misc/winutils/include/libavformat/avformat.h
author unc0rr
Tue, 04 Feb 2014 23:53:43 +0400
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permissions -rw-r--r--
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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVFORMAT_AVFORMAT_H
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#define AVFORMAT_AVFORMAT_H
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/**
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 * @file
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 * @ingroup libavf
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 * Main libavformat public API header
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 */
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/**
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 * @defgroup libavf I/O and Muxing/Demuxing Library
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 * @{
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 *
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 * Libavformat (lavf) is a library for dealing with various media container
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 * formats. Its main two purposes are demuxing - i.e. splitting a media file
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 * into component streams, and the reverse process of muxing - writing supplied
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 * data in a specified container format. It also has an @ref lavf_io
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 * "I/O module" which supports a number of protocols for accessing the data (e.g.
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 * file, tcp, http and others). Before using lavf, you need to call
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 * av_register_all() to register all compiled muxers, demuxers and protocols.
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 * Unless you are absolutely sure you won't use libavformat's network
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 * capabilities, you should also call avformat_network_init().
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 *
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 * A supported input format is described by an AVInputFormat struct, conversely
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 * an output format is described by AVOutputFormat. You can iterate over all
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 * registered input/output formats using the av_iformat_next() /
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 * av_oformat_next() functions. The protocols layer is not part of the public
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 * API, so you can only get the names of supported protocols with the
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 * avio_enum_protocols() function.
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 *
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 * Main lavf structure used for both muxing and demuxing is AVFormatContext,
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 * which exports all information about the file being read or written. As with
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 * most Libav structures, its size is not part of public ABI, so it cannot be
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 * allocated on stack or directly with av_malloc(). To create an
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 * AVFormatContext, use avformat_alloc_context() (some functions, like
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 * avformat_open_input() might do that for you).
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 *
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 * Most importantly an AVFormatContext contains:
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 * @li the @ref AVFormatContext.iformat "input" or @ref AVFormatContext.oformat
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 * "output" format. It is either autodetected or set by user for input;
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 * always set by user for output.
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 * @li an @ref AVFormatContext.streams "array" of AVStreams, which describe all
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 * elementary streams stored in the file. AVStreams are typically referred to
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 * using their index in this array.
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 * @li an @ref AVFormatContext.pb "I/O context". It is either opened by lavf or
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 * set by user for input, always set by user for output (unless you are dealing
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 * with an AVFMT_NOFILE format).
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 *
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 * @section lavf_options Passing options to (de)muxers
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 * Lavf allows to configure muxers and demuxers using the @ref avoptions
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 * mechanism. Generic (format-independent) libavformat options are provided by
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 * AVFormatContext, they can be examined from a user program by calling
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 * av_opt_next() / av_opt_find() on an allocated AVFormatContext (or its AVClass
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 * from avformat_get_class()). Private (format-specific) options are provided by
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 * AVFormatContext.priv_data if and only if AVInputFormat.priv_class /
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 * AVOutputFormat.priv_class of the corresponding format struct is non-NULL.
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 * Further options may be provided by the @ref AVFormatContext.pb "I/O context",
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 * if its AVClass is non-NULL, and the protocols layer. See the discussion on
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 * nesting in @ref avoptions documentation to learn how to access those.
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 *
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 * @defgroup lavf_decoding Demuxing
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 * @{
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 * Demuxers read a media file and split it into chunks of data (@em packets). A
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 * @ref AVPacket "packet" contains one or more encoded frames which belongs to a
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 * single elementary stream. In the lavf API this process is represented by the
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 * avformat_open_input() function for opening a file, av_read_frame() for
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 * reading a single packet and finally avformat_close_input(), which does the
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 * cleanup.
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 *
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 * @section lavf_decoding_open Opening a media file
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 * The minimum information required to open a file is its URL or filename, which
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 * is passed to avformat_open_input(), as in the following code:
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 * @code
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 * const char    *url = "in.mp3";
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 * AVFormatContext *s = NULL;
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 * int ret = avformat_open_input(&s, url, NULL, NULL);
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 * if (ret < 0)
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 *     abort();
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 * @endcode
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 * The above code attempts to allocate an AVFormatContext, open the
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 * specified file (autodetecting the format) and read the header, exporting the
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 * information stored there into s. Some formats do not have a header or do not
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 * store enough information there, so it is recommended that you call the
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 * avformat_find_stream_info() function which tries to read and decode a few
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 * frames to find missing information.
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 *
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 * In some cases you might want to preallocate an AVFormatContext yourself with
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 * avformat_alloc_context() and do some tweaking on it before passing it to
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 * avformat_open_input(). One such case is when you want to use custom functions
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 * for reading input data instead of lavf internal I/O layer.
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 * To do that, create your own AVIOContext with avio_alloc_context(), passing
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 * your reading callbacks to it. Then set the @em pb field of your
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 * AVFormatContext to newly created AVIOContext.
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 *
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 * Since the format of the opened file is in general not known until after
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 * avformat_open_input() has returned, it is not possible to set demuxer private
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 * options on a preallocated context. Instead, the options should be passed to
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 * avformat_open_input() wrapped in an AVDictionary:
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 * @code
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 * AVDictionary *options = NULL;
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 * av_dict_set(&options, "video_size", "640x480", 0);
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 * av_dict_set(&options, "pixel_format", "rgb24", 0);
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 *
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 * if (avformat_open_input(&s, url, NULL, &options) < 0)
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 *     abort();
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 * av_dict_free(&options);
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 * @endcode
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 * This code passes the private options 'video_size' and 'pixel_format' to the
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 * demuxer. They would be necessary for e.g. the rawvideo demuxer, since it
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 * cannot know how to interpret raw video data otherwise. If the format turns
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 * out to be something different than raw video, those options will not be
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 * recognized by the demuxer and therefore will not be applied. Such unrecognized
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 * options are then returned in the options dictionary (recognized options are
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 * consumed). The calling program can handle such unrecognized options as it
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 * wishes, e.g.
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 * @code
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 * AVDictionaryEntry *e;
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 * if (e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
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 *     fprintf(stderr, "Option %s not recognized by the demuxer.\n", e->key);
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 *     abort();
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 * }
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 * @endcode
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 *
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 * After you have finished reading the file, you must close it with
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 * avformat_close_input(). It will free everything associated with the file.
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 *
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 * @section lavf_decoding_read Reading from an opened file
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 * Reading data from an opened AVFormatContext is done by repeatedly calling
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 * av_read_frame() on it. Each call, if successful, will return an AVPacket
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 * containing encoded data for one AVStream, identified by
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 * AVPacket.stream_index. This packet may be passed straight into the libavcodec
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 * decoding functions avcodec_decode_video2(), avcodec_decode_audio4() or
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 * avcodec_decode_subtitle2() if the caller wishes to decode the data.
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 *
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 * AVPacket.pts, AVPacket.dts and AVPacket.duration timing information will be
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 * set if known. They may also be unset (i.e. AV_NOPTS_VALUE for
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 * pts/dts, 0 for duration) if the stream does not provide them. The timing
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 * information will be in AVStream.time_base units, i.e. it has to be
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 * multiplied by the timebase to convert them to seconds.
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 *
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 * The packet data belongs to the demuxer and is invalid after the next call to
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 * av_read_frame(). The user must free the packet with av_free_packet() before
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 * calling av_read_frame() again or closing the file.
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 *
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 * @section lavf_decoding_seek Seeking
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 * @}
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 *
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 * @defgroup lavf_encoding Muxing
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 * @{
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 * @}
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 *
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 * @defgroup lavf_io I/O Read/Write
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 * @{
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 * @}
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 *
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 * @defgroup lavf_codec Demuxers
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 * @{
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 * @defgroup lavf_codec_native Native Demuxers
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 * @{
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 * @}
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 * @defgroup lavf_codec_wrappers External library wrappers
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 * @{
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 * @}
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 * @}
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 * @defgroup lavf_protos I/O Protocols
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 * @{
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 * @}
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 * @defgroup lavf_internal Internal
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 * @{
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 * @}
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 * @}
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 *
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 */
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#include <time.h>
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#include <stdio.h>  /* FILE */
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#include "libavcodec/avcodec.h"
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#include "libavutil/dict.h"
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#include "libavutil/log.h"
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#include "avio.h"
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#include "libavformat/version.h"
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#if FF_API_AV_GETTIME
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#include "libavutil/time.h"
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#endif
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struct AVFormatContext;
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/**
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 * @defgroup metadata_api Public Metadata API
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 * @{
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 * @ingroup libavf
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 * The metadata API allows libavformat to export metadata tags to a client
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 * application when demuxing. Conversely it allows a client application to
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 * set metadata when muxing.
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 *
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 * Metadata is exported or set as pairs of key/value strings in the 'metadata'
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 * fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs
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 * using the @ref lavu_dict "AVDictionary" API. Like all strings in Libav,
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 * metadata is assumed to be UTF-8 encoded Unicode. Note that metadata
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 * exported by demuxers isn't checked to be valid UTF-8 in most cases.
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 *
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 * Important concepts to keep in mind:
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 * -  Keys are unique; there can never be 2 tags with the same key. This is
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 *    also meant semantically, i.e., a demuxer should not knowingly produce
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 *    several keys that are literally different but semantically identical.
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 *    E.g., key=Author5, key=Author6. In this example, all authors must be
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 *    placed in the same tag.
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 * -  Metadata is flat, not hierarchical; there are no subtags. If you
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 *    want to store, e.g., the email address of the child of producer Alice
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 *    and actor Bob, that could have key=alice_and_bobs_childs_email_address.
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 * -  Several modifiers can be applied to the tag name. This is done by
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 *    appending a dash character ('-') and the modifier name in the order
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 *    they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng.
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 *    -  language -- a tag whose value is localized for a particular language
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 *       is appended with the ISO 639-2/B 3-letter language code.
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 *       For example: Author-ger=Michael, Author-eng=Mike
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 *       The original/default language is in the unqualified "Author" tag.
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 *       A demuxer should set a default if it sets any translated tag.
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 *    -  sorting  -- a modified version of a tag that should be used for
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 *       sorting will have '-sort' appended. E.g. artist="The Beatles",
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 *       artist-sort="Beatles, The".
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 *
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 * -  Demuxers attempt to export metadata in a generic format, however tags
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 *    with no generic equivalents are left as they are stored in the container.
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 *    Follows a list of generic tag names:
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 *
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 @verbatim
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 album        -- name of the set this work belongs to
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 album_artist -- main creator of the set/album, if different from artist.
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                 e.g. "Various Artists" for compilation albums.
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 artist       -- main creator of the work
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 comment      -- any additional description of the file.
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 composer     -- who composed the work, if different from artist.
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 copyright    -- name of copyright holder.
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 creation_time-- date when the file was created, preferably in ISO 8601.
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 date         -- date when the work was created, preferably in ISO 8601.
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 disc         -- number of a subset, e.g. disc in a multi-disc collection.
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 encoder      -- name/settings of the software/hardware that produced the file.
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 encoded_by   -- person/group who created the file.
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 filename     -- original name of the file.
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 genre        -- <self-evident>.
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 language     -- main language in which the work is performed, preferably
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                 in ISO 639-2 format. Multiple languages can be specified by
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                 separating them with commas.
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 performer    -- artist who performed the work, if different from artist.
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                 E.g for "Also sprach Zarathustra", artist would be "Richard
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                 Strauss" and performer "London Philharmonic Orchestra".
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 publisher    -- name of the label/publisher.
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 service_name     -- name of the service in broadcasting (channel name).
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 service_provider -- name of the service provider in broadcasting.
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 title        -- name of the work.
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 track        -- number of this work in the set, can be in form current/total.
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 variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of
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 @endverbatim
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 *
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 * Look in the examples section for an application example how to use the Metadata API.
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 *
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 * @}
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 */
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/* packet functions */
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/**
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 * Allocate and read the payload of a packet and initialize its
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 * fields with default values.
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 *
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 * @param pkt packet
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 * @param size desired payload size
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 * @return >0 (read size) if OK, AVERROR_xxx otherwise
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 */
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int av_get_packet(AVIOContext *s, AVPacket *pkt, int size);
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/**
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 * Read data and append it to the current content of the AVPacket.
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 * If pkt->size is 0 this is identical to av_get_packet.
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 * Note that this uses av_grow_packet and thus involves a realloc
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 * which is inefficient. Thus this function should only be used
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 * when there is no reasonable way to know (an upper bound of)
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 * the final size.
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 *
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 * @param pkt packet
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 * @param size amount of data to read
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 * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data
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 *         will not be lost even if an error occurs.
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 */
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int av_append_packet(AVIOContext *s, AVPacket *pkt, int size);
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/*************************************************/
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/* fractional numbers for exact pts handling */
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/**
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 * The exact value of the fractional number is: 'val + num / den'.
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 * num is assumed to be 0 <= num < den.
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 */
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typedef struct AVFrac {
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    int64_t val, num, den;
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} AVFrac;
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/*************************************************/
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/* input/output formats */
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struct AVCodecTag;
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/**
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 * This structure contains the data a format has to probe a file.
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 */
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typedef struct AVProbeData {
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    const char *filename;
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    unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */
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    int buf_size;       /**< Size of buf except extra allocated bytes */
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} AVProbeData;
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#define AVPROBE_SCORE_MAX 100               ///< maximum score, half of that is used for file-extension-based detection
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#define AVPROBE_PADDING_SIZE 32             ///< extra allocated bytes at the end of the probe buffer
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   341
/// Demuxer will use avio_open, no opened file should be provided by the caller.
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   342
#define AVFMT_NOFILE        0x0001
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   343
#define AVFMT_NEEDNUMBER    0x0002 /**< Needs '%d' in filename. */
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   344
#define AVFMT_SHOW_IDS      0x0008 /**< Show format stream IDs numbers. */
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   345
#define AVFMT_RAWPICTURE    0x0020 /**< Format wants AVPicture structure for
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   346
                                      raw picture data. */
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   347
#define AVFMT_GLOBALHEADER  0x0040 /**< Format wants global header. */
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   348
#define AVFMT_NOTIMESTAMPS  0x0080 /**< Format does not need / have any timestamps. */
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   349
#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
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   350
#define AVFMT_TS_DISCONT    0x0200 /**< Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps */
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   351
#define AVFMT_VARIABLE_FPS  0x0400 /**< Format allows variable fps. */
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   352
#define AVFMT_NODIMENSIONS  0x0800 /**< Format does not need width/height */
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   353
#define AVFMT_NOSTREAMS     0x1000 /**< Format does not require any streams */
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   354
#define AVFMT_NOBINSEARCH   0x2000 /**< Format does not allow to fallback to binary search via read_timestamp */
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   355
#define AVFMT_NOGENSEARCH   0x4000 /**< Format does not allow to fallback to generic search */
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   356
#define AVFMT_NO_BYTE_SEEK  0x8000 /**< Format does not allow seeking by bytes */
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   357
#define AVFMT_ALLOW_FLUSH  0x10000 /**< Format allows flushing. If not set, the muxer will not receive a NULL packet in the write_packet function. */
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   358
#define AVFMT_TS_NONSTRICT 0x20000 /**< Format does not require strictly
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   359
                                        increasing timestamps, but they must
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   360
                                        still be monotonic */
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   361
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   362
/**
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   363
 * @addtogroup lavf_encoding
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   364
 * @{
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   365
 */
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   366
typedef struct AVOutputFormat {
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   367
    const char *name;
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   368
    /**
7ac83d79b897 support video recording on windows with automation and headers
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   369
     * Descriptive name for the format, meant to be more human-readable
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koda
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   370
     * than name. You should use the NULL_IF_CONFIG_SMALL() macro
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   371
     * to define it.
7ac83d79b897 support video recording on windows with automation and headers
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   372
     */
7ac83d79b897 support video recording on windows with automation and headers
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   373
    const char *long_name;
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   374
    const char *mime_type;
7ac83d79b897 support video recording on windows with automation and headers
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   375
    const char *extensions; /**< comma-separated filename extensions */
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   376
    /* output support */
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   377
    enum AVCodecID audio_codec;    /**< default audio codec */
7ac83d79b897 support video recording on windows with automation and headers
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   378
    enum AVCodecID video_codec;    /**< default video codec */
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   379
    enum AVCodecID subtitle_codec; /**< default subtitle codec */
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   380
    /**
7ac83d79b897 support video recording on windows with automation and headers
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   381
     * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE,
7ac83d79b897 support video recording on windows with automation and headers
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   382
     * AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS,
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   383
     * AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH,
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   384
     * AVFMT_TS_NONSTRICT
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   385
     */
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   386
    int flags;
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diff changeset
   387
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   388
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   389
     * List of supported codec_id-codec_tag pairs, ordered by "better
7ac83d79b897 support video recording on windows with automation and headers
koda
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   390
     * choice first". The arrays are all terminated by AV_CODEC_ID_NONE.
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koda
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diff changeset
   391
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   392
    const struct AVCodecTag * const *codec_tag;
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diff changeset
   393
7ac83d79b897 support video recording on windows with automation and headers
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diff changeset
   394
7ac83d79b897 support video recording on windows with automation and headers
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   395
    const AVClass *priv_class; ///< AVClass for the private context
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diff changeset
   396
7ac83d79b897 support video recording on windows with automation and headers
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diff changeset
   397
    /*****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
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diff changeset
   398
     * No fields below this line are part of the public API. They
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   399
     * may not be used outside of libavformat and can be changed and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   400
     * removed at will.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   401
     * New public fields should be added right above.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   402
     *****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   403
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   404
    struct AVOutputFormat *next;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   405
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   406
     * size of private data so that it can be allocated in the wrapper
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   407
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   408
    int priv_data_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   409
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   410
    int (*write_header)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   411
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   412
     * Write a packet. If AVFMT_ALLOW_FLUSH is set in flags,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   413
     * pkt can be NULL in order to flush data buffered in the muxer.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   414
     * When flushing, return 0 if there still is more data to flush,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   415
     * or 1 if everything was flushed and there is no more buffered
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   416
     * data.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   417
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   418
    int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
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koda
parents:
diff changeset
   419
    int (*write_trailer)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   420
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   421
     * Currently only used to set pixel format if not YUV420P.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   422
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   423
    int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
7ac83d79b897 support video recording on windows with automation and headers
koda
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diff changeset
   424
                             AVPacket *in, int flush);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   425
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   426
     * Test if the given codec can be stored in this container.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   427
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   428
     * @return 1 if the codec is supported, 0 if it is not.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   429
     *         A negative number if unknown.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   430
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   431
    int (*query_codec)(enum AVCodecID id, int std_compliance);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   432
} AVOutputFormat;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   433
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   434
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   435
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   436
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   437
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   438
 * @addtogroup lavf_decoding
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   439
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   440
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   441
typedef struct AVInputFormat {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   442
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   443
     * A comma separated list of short names for the format. New names
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   444
     * may be appended with a minor bump.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   445
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   446
    const char *name;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   447
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   448
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   449
     * Descriptive name for the format, meant to be more human-readable
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   450
     * than name. You should use the NULL_IF_CONFIG_SMALL() macro
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   451
     * to define it.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   452
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   453
    const char *long_name;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   454
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   455
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   456
     * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   457
     * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   458
     * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   459
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   460
    int flags;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   461
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   462
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   463
     * If extensions are defined, then no probe is done. You should
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   464
     * usually not use extension format guessing because it is not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   465
     * reliable enough
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   466
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   467
    const char *extensions;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   468
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   469
    const struct AVCodecTag * const *codec_tag;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   470
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   471
    const AVClass *priv_class; ///< AVClass for the private context
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   472
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   473
    /*****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   474
     * No fields below this line are part of the public API. They
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   475
     * may not be used outside of libavformat and can be changed and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   476
     * removed at will.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   477
     * New public fields should be added right above.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   478
     *****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   479
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   480
    struct AVInputFormat *next;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   481
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   482
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   483
     * Raw demuxers store their codec ID here.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   484
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   485
    int raw_codec_id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   486
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   487
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   488
     * Size of private data so that it can be allocated in the wrapper.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   489
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   490
    int priv_data_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   491
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   492
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   493
     * Tell if a given file has a chance of being parsed as this format.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   494
     * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   495
     * big so you do not have to check for that unless you need more.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   496
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   497
    int (*read_probe)(AVProbeData *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   498
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   499
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   500
     * Read the format header and initialize the AVFormatContext
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   501
     * structure. Return 0 if OK. Only used in raw format right
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   502
     * now. 'avformat_new_stream' should be called to create new streams.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   503
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   504
    int (*read_header)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   505
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   506
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   507
     * Read one packet and put it in 'pkt'. pts and flags are also
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   508
     * set. 'avformat_new_stream' can be called only if the flag
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   509
     * AVFMTCTX_NOHEADER is used and only in the calling thread (not in a
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   510
     * background thread).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   511
     * @return 0 on success, < 0 on error.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   512
     *         When returning an error, pkt must not have been allocated
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   513
     *         or must be freed before returning
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   514
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   515
    int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   516
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   517
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   518
     * Close the stream. The AVFormatContext and AVStreams are not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   519
     * freed by this function
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   520
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   521
    int (*read_close)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   522
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   523
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   524
     * Seek to a given timestamp relative to the frames in
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   525
     * stream component stream_index.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   526
     * @param stream_index Must not be -1.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   527
     * @param flags Selects which direction should be preferred if no exact
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   528
     *              match is available.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   529
     * @return >= 0 on success (but not necessarily the new offset)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   530
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   531
    int (*read_seek)(struct AVFormatContext *,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   532
                     int stream_index, int64_t timestamp, int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   533
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   534
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   535
     * Get the next timestamp in stream[stream_index].time_base units.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   536
     * @return the timestamp or AV_NOPTS_VALUE if an error occurred
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   537
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   538
    int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   539
                              int64_t *pos, int64_t pos_limit);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   540
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   541
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   542
     * Start/resume playing - only meaningful if using a network-based format
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   543
     * (RTSP).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   544
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   545
    int (*read_play)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   546
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   547
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   548
     * Pause playing - only meaningful if using a network-based format
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   549
     * (RTSP).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   550
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   551
    int (*read_pause)(struct AVFormatContext *);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   552
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   553
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   554
     * Seek to timestamp ts.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   555
     * Seeking will be done so that the point from which all active streams
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   556
     * can be presented successfully will be closest to ts and within min/max_ts.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   557
     * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   558
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   559
    int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   560
} AVInputFormat;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   561
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   562
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   563
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   564
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   565
enum AVStreamParseType {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   566
    AVSTREAM_PARSE_NONE,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   567
    AVSTREAM_PARSE_FULL,       /**< full parsing and repack */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   568
    AVSTREAM_PARSE_HEADERS,    /**< Only parse headers, do not repack. */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   569
    AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   570
    AVSTREAM_PARSE_FULL_ONCE,  /**< full parsing and repack of the first frame only, only implemented for H.264 currently */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   571
};
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   572
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   573
typedef struct AVIndexEntry {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   574
    int64_t pos;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   575
    int64_t timestamp;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   576
#define AVINDEX_KEYFRAME 0x0001
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   577
    int flags:2;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   578
    int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   579
    int min_distance;         /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   580
} AVIndexEntry;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   581
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   582
#define AV_DISPOSITION_DEFAULT   0x0001
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   583
#define AV_DISPOSITION_DUB       0x0002
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   584
#define AV_DISPOSITION_ORIGINAL  0x0004
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   585
#define AV_DISPOSITION_COMMENT   0x0008
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   586
#define AV_DISPOSITION_LYRICS    0x0010
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   587
#define AV_DISPOSITION_KARAOKE   0x0020
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   588
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   589
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   590
 * Track should be used during playback by default.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   591
 * Useful for subtitle track that should be displayed
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   592
 * even when user did not explicitly ask for subtitles.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   593
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   594
#define AV_DISPOSITION_FORCED    0x0040
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   595
#define AV_DISPOSITION_HEARING_IMPAIRED  0x0080  /**< stream for hearing impaired audiences */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   596
#define AV_DISPOSITION_VISUAL_IMPAIRED   0x0100  /**< stream for visual impaired audiences */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   597
#define AV_DISPOSITION_CLEAN_EFFECTS     0x0200  /**< stream without voice */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   598
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   599
 * The stream is stored in the file as an attached picture/"cover art" (e.g.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   600
 * APIC frame in ID3v2). The single packet associated with it will be returned
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   601
 * among the first few packets read from the file unless seeking takes place.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   602
 * It can also be accessed at any time in AVStream.attached_pic.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   603
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   604
#define AV_DISPOSITION_ATTACHED_PIC      0x0400
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   605
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   606
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   607
 * Stream structure.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   608
 * New fields can be added to the end with minor version bumps.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   609
 * Removal, reordering and changes to existing fields require a major
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   610
 * version bump.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   611
 * sizeof(AVStream) must not be used outside libav*.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   612
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   613
typedef struct AVStream {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   614
    int index;    /**< stream index in AVFormatContext */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   615
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   616
     * Format-specific stream ID.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   617
     * decoding: set by libavformat
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   618
     * encoding: set by the user
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   619
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   620
    int id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   621
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   622
     * Codec context associated with this stream. Allocated and freed by
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   623
     * libavformat.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   624
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   625
     * - decoding: The demuxer exports codec information stored in the headers
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   626
     *             here.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   627
     * - encoding: The user sets codec information, the muxer writes it to the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   628
     *             output. Mandatory fields as specified in AVCodecContext
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   629
     *             documentation must be set even if this AVCodecContext is
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   630
     *             not actually used for encoding.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   631
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   632
    AVCodecContext *codec;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   633
#if FF_API_R_FRAME_RATE
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   634
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   635
     * Real base framerate of the stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   636
     * This is the lowest framerate with which all timestamps can be
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   637
     * represented accurately (it is the least common multiple of all
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   638
     * framerates in the stream). Note, this value is just a guess!
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   639
     * For example, if the time base is 1/90000 and all frames have either
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   640
     * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   641
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   642
    AVRational r_frame_rate;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   643
#endif
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   644
    void *priv_data;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   645
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   646
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   647
     * encoding: pts generation when outputting stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   648
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   649
    struct AVFrac pts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   650
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   651
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   652
     * This is the fundamental unit of time (in seconds) in terms
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   653
     * of which frame timestamps are represented.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   654
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   655
     * decoding: set by libavformat
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   656
     * encoding: set by libavformat in avformat_write_header. The muxer may use the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   657
     * user-provided value of @ref AVCodecContext.time_base "codec->time_base"
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   658
     * as a hint.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   659
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   660
    AVRational time_base;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   661
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   662
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   663
     * Decoding: pts of the first frame of the stream, in stream time base.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   664
     * Only set this if you are absolutely 100% sure that the value you set
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   665
     * it to really is the pts of the first frame.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   666
     * This may be undefined (AV_NOPTS_VALUE).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   667
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   668
    int64_t start_time;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   669
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   670
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   671
     * Decoding: duration of the stream, in stream time base.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   672
     * If a source file does not specify a duration, but does specify
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   673
     * a bitrate, this value will be estimated from bitrate and file size.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   674
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   675
    int64_t duration;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   676
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   677
    int64_t nb_frames;                 ///< number of frames in this stream if known or 0
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   678
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   679
    int disposition; /**< AV_DISPOSITION_* bit field */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   680
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   681
    enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   682
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   683
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   684
     * sample aspect ratio (0 if unknown)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   685
     * - encoding: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   686
     * - decoding: Set by libavformat.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   687
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   688
    AVRational sample_aspect_ratio;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   689
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   690
    AVDictionary *metadata;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   691
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   692
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   693
     * Average framerate
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   694
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   695
    AVRational avg_frame_rate;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   696
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   697
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   698
     * For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   699
     * will contain the attached picture.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   700
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   701
     * decoding: set by libavformat, must not be modified by the caller.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   702
     * encoding: unused
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   703
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   704
    AVPacket attached_pic;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   705
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   706
    /*****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   707
     * All fields below this line are not part of the public API. They
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   708
     * may not be used outside of libavformat and can be changed and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   709
     * removed at will.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   710
     * New public fields should be added right above.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   711
     *****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   712
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   713
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   714
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   715
     * Stream information used internally by av_find_stream_info()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   716
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   717
#define MAX_STD_TIMEBASES (60*12+5)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   718
    struct {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   719
#if FF_API_R_FRAME_RATE
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   720
        int64_t last_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   721
        int64_t duration_gcd;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   722
        int duration_count;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   723
        double duration_error[MAX_STD_TIMEBASES];
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   724
#endif
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   725
        int nb_decoded_frames;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   726
        int found_decoder;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   727
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   728
        /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   729
         * Those are used for average framerate estimation.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   730
         */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   731
        int64_t fps_first_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   732
        int     fps_first_dts_idx;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   733
        int64_t fps_last_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   734
        int     fps_last_dts_idx;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   735
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   736
    } *info;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   737
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   738
    int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   739
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   740
    // Timestamp generation support:
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   741
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   742
     * Timestamp corresponding to the last dts sync point.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   743
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   744
     * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   745
     * a DTS is received from the underlying container. Otherwise set to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   746
     * AV_NOPTS_VALUE by default.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   747
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   748
    int64_t reference_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   749
    int64_t first_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   750
    int64_t cur_dts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   751
    int64_t last_IP_pts;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   752
    int last_IP_duration;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   753
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   754
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   755
     * Number of packets to buffer for codec probing
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   756
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   757
#define MAX_PROBE_PACKETS 2500
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   758
    int probe_packets;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   759
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   760
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   761
     * Number of frames that have been demuxed during av_find_stream_info()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   762
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   763
    int codec_info_nb_frames;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   764
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   765
    /* av_read_frame() support */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   766
    enum AVStreamParseType need_parsing;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   767
    struct AVCodecParserContext *parser;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   768
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   769
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   770
     * last packet in packet_buffer for this stream when muxing.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   771
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   772
    struct AVPacketList *last_in_packet_buffer;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   773
    AVProbeData probe_data;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   774
#define MAX_REORDER_DELAY 16
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   775
    int64_t pts_buffer[MAX_REORDER_DELAY+1];
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   776
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   777
    AVIndexEntry *index_entries; /**< Only used if the format does not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   778
                                    support seeking natively. */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   779
    int nb_index_entries;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   780
    unsigned int index_entries_allocated_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   781
} AVStream;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   782
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   783
#define AV_PROGRAM_RUNNING 1
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   784
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   785
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   786
 * New fields can be added to the end with minor version bumps.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   787
 * Removal, reordering and changes to existing fields require a major
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   788
 * version bump.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   789
 * sizeof(AVProgram) must not be used outside libav*.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   790
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   791
typedef struct AVProgram {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   792
    int            id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   793
    int            flags;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   794
    enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   795
    unsigned int   *stream_index;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   796
    unsigned int   nb_stream_indexes;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   797
    AVDictionary *metadata;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   798
} AVProgram;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   799
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   800
#define AVFMTCTX_NOHEADER      0x0001 /**< signal that no header is present
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   801
                                         (streams are added dynamically) */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   802
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   803
typedef struct AVChapter {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   804
    int id;                 ///< unique ID to identify the chapter
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   805
    AVRational time_base;   ///< time base in which the start/end timestamps are specified
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   806
    int64_t start, end;     ///< chapter start/end time in time_base units
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   807
    AVDictionary *metadata;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   808
} AVChapter;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   809
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   810
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   811
 * Format I/O context.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   812
 * New fields can be added to the end with minor version bumps.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   813
 * Removal, reordering and changes to existing fields require a major
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   814
 * version bump.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   815
 * sizeof(AVFormatContext) must not be used outside libav*, use
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   816
 * avformat_alloc_context() to create an AVFormatContext.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   817
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   818
typedef struct AVFormatContext {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   819
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   820
     * A class for logging and AVOptions. Set by avformat_alloc_context().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   821
     * Exports (de)muxer private options if they exist.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   822
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   823
    const AVClass *av_class;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   824
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   825
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   826
     * Can only be iformat or oformat, not both at the same time.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   827
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   828
     * decoding: set by avformat_open_input().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   829
     * encoding: set by the user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   830
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   831
    struct AVInputFormat *iformat;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   832
    struct AVOutputFormat *oformat;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   833
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   834
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   835
     * Format private data. This is an AVOptions-enabled struct
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   836
     * if and only if iformat/oformat.priv_class is not NULL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   837
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   838
    void *priv_data;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   839
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   840
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   841
     * I/O context.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   842
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   843
     * decoding: either set by the user before avformat_open_input() (then
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   844
     * the user must close it manually) or set by avformat_open_input().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   845
     * encoding: set by the user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   846
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   847
     * Do NOT set this field if AVFMT_NOFILE flag is set in
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   848
     * iformat/oformat.flags. In such a case, the (de)muxer will handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   849
     * I/O in some other way and this field will be NULL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   850
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   851
    AVIOContext *pb;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   852
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   853
    /* stream info */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   854
    int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   855
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   856
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   857
     * A list of all streams in the file. New streams are created with
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   858
     * avformat_new_stream().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   859
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   860
     * decoding: streams are created by libavformat in avformat_open_input().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   861
     * If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   862
     * appear in av_read_frame().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   863
     * encoding: streams are created by the user before avformat_write_header().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   864
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   865
    unsigned int nb_streams;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   866
    AVStream **streams;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   867
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   868
    char filename[1024]; /**< input or output filename */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   869
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   870
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   871
     * Decoding: position of the first frame of the component, in
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   872
     * AV_TIME_BASE fractional seconds. NEVER set this value directly:
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   873
     * It is deduced from the AVStream values.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   874
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   875
    int64_t start_time;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   876
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   877
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   878
     * Decoding: duration of the stream, in AV_TIME_BASE fractional
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   879
     * seconds. Only set this value if you know none of the individual stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   880
     * durations and also do not set any of them. This is deduced from the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   881
     * AVStream values if not set.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   882
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   883
    int64_t duration;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   884
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   885
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   886
     * Decoding: total stream bitrate in bit/s, 0 if not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   887
     * available. Never set it directly if the file_size and the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   888
     * duration are known as Libav can compute it automatically.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   889
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   890
    int bit_rate;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   891
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   892
    unsigned int packet_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   893
    int max_delay;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   894
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   895
    int flags;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   896
#define AVFMT_FLAG_GENPTS       0x0001 ///< Generate missing pts even if it requires parsing future frames.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   897
#define AVFMT_FLAG_IGNIDX       0x0002 ///< Ignore index.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   898
#define AVFMT_FLAG_NONBLOCK     0x0004 ///< Do not block when reading packets from input.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   899
#define AVFMT_FLAG_IGNDTS       0x0008 ///< Ignore DTS on frames that contain both DTS & PTS
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   900
#define AVFMT_FLAG_NOFILLIN     0x0010 ///< Do not infer any values from other values, just return what is stored in the container
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   901
#define AVFMT_FLAG_NOPARSE      0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   902
#define AVFMT_FLAG_NOBUFFER     0x0040 ///< Do not buffer frames when possible
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   903
#define AVFMT_FLAG_CUSTOM_IO    0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   904
#define AVFMT_FLAG_DISCARD_CORRUPT  0x0100 ///< Discard frames marked corrupted
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   905
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   906
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   907
     * decoding: size of data to probe; encoding: unused.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   908
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   909
    unsigned int probesize;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   910
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   911
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   912
     * decoding: maximum time (in AV_TIME_BASE units) during which the input should
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   913
     * be analyzed in avformat_find_stream_info().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   914
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   915
    int max_analyze_duration;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   916
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   917
    const uint8_t *key;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   918
    int keylen;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   919
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   920
    unsigned int nb_programs;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   921
    AVProgram **programs;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   922
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   923
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   924
     * Forced video codec_id.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   925
     * Demuxing: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   926
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   927
    enum AVCodecID video_codec_id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   928
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   929
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   930
     * Forced audio codec_id.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   931
     * Demuxing: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   932
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   933
    enum AVCodecID audio_codec_id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   934
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   935
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   936
     * Forced subtitle codec_id.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   937
     * Demuxing: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   938
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   939
    enum AVCodecID subtitle_codec_id;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   940
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   941
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   942
     * Maximum amount of memory in bytes to use for the index of each stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   943
     * If the index exceeds this size, entries will be discarded as
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   944
     * needed to maintain a smaller size. This can lead to slower or less
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   945
     * accurate seeking (depends on demuxer).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   946
     * Demuxers for which a full in-memory index is mandatory will ignore
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   947
     * this.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   948
     * muxing  : unused
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   949
     * demuxing: set by user
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   950
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   951
    unsigned int max_index_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   952
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   953
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   954
     * Maximum amount of memory in bytes to use for buffering frames
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   955
     * obtained from realtime capture devices.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   956
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   957
    unsigned int max_picture_buffer;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   958
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   959
    unsigned int nb_chapters;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   960
    AVChapter **chapters;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   961
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   962
    AVDictionary *metadata;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   963
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   964
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   965
     * Start time of the stream in real world time, in microseconds
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   966
     * since the unix epoch (00:00 1st January 1970). That is, pts=0
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   967
     * in the stream was captured at this real world time.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   968
     * - encoding: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   969
     * - decoding: Unused.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   970
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   971
    int64_t start_time_realtime;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   972
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   973
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   974
     * decoding: number of frames used to probe fps
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   975
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   976
    int fps_probe_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   977
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   978
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   979
     * Error recognition; higher values will detect more errors but may
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   980
     * misdetect some more or less valid parts as errors.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   981
     * - encoding: unused
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   982
     * - decoding: Set by user.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   983
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   984
    int error_recognition;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   985
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   986
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   987
     * Custom interrupt callbacks for the I/O layer.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   988
     *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   989
     * decoding: set by the user before avformat_open_input().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   990
     * encoding: set by the user before avformat_write_header()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   991
     * (mainly useful for AVFMT_NOFILE formats). The callback
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   992
     * should also be passed to avio_open2() if it's used to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   993
     * open the file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   994
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   995
    AVIOInterruptCB interrupt_callback;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   996
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   997
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   998
     * Flags to enable debugging.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
   999
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1000
    int debug;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1001
#define FF_FDEBUG_TS        0x0001
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1002
    /*****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1003
     * All fields below this line are not part of the public API. They
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1004
     * may not be used outside of libavformat and can be changed and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1005
     * removed at will.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1006
     * New public fields should be added right above.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1007
     *****************************************************************
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1008
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1009
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1010
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1011
     * This buffer is only needed when packets were already buffered but
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1012
     * not decoded, for example to get the codec parameters in MPEG
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1013
     * streams.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1014
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1015
    struct AVPacketList *packet_buffer;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1016
    struct AVPacketList *packet_buffer_end;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1017
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1018
    /* av_seek_frame() support */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1019
    int64_t data_offset; /**< offset of the first packet */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1020
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1021
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1022
     * Raw packets from the demuxer, prior to parsing and decoding.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1023
     * This buffer is used for buffering packets until the codec can
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1024
     * be identified, as parsing cannot be done without knowing the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1025
     * codec.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1026
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1027
    struct AVPacketList *raw_packet_buffer;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1028
    struct AVPacketList *raw_packet_buffer_end;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1029
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1030
     * Packets split by the parser get queued here.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1031
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1032
    struct AVPacketList *parse_queue;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1033
    struct AVPacketList *parse_queue_end;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1034
    /**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1035
     * Remaining size available for raw_packet_buffer, in bytes.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1036
     */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1037
#define RAW_PACKET_BUFFER_SIZE 2500000
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1038
    int raw_packet_buffer_remaining_size;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1039
} AVFormatContext;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1040
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1041
typedef struct AVPacketList {
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1042
    AVPacket pkt;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1043
    struct AVPacketList *next;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1044
} AVPacketList;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1045
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1046
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1047
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1048
 * @defgroup lavf_core Core functions
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1049
 * @ingroup libavf
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1050
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1051
 * Functions for querying libavformat capabilities, allocating core structures,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1052
 * etc.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1053
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1054
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1055
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1056
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1057
 * Return the LIBAVFORMAT_VERSION_INT constant.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1058
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1059
unsigned avformat_version(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1060
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1061
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1062
 * Return the libavformat build-time configuration.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1063
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1064
const char *avformat_configuration(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1065
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1066
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1067
 * Return the libavformat license.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1068
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1069
const char *avformat_license(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1070
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1071
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1072
 * Initialize libavformat and register all the muxers, demuxers and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1073
 * protocols. If you do not call this function, then you can select
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1074
 * exactly which formats you want to support.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1075
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1076
 * @see av_register_input_format()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1077
 * @see av_register_output_format()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1078
 * @see av_register_protocol()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1079
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1080
void av_register_all(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1081
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1082
void av_register_input_format(AVInputFormat *format);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1083
void av_register_output_format(AVOutputFormat *format);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1084
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1085
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1086
 * Do global initialization of network components. This is optional,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1087
 * but recommended, since it avoids the overhead of implicitly
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1088
 * doing the setup for each session.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1089
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1090
 * Calling this function will become mandatory if using network
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1091
 * protocols at some major version bump.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1092
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1093
int avformat_network_init(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1094
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1095
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1096
 * Undo the initialization done by avformat_network_init.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1097
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1098
int avformat_network_deinit(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1099
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1100
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1101
 * If f is NULL, returns the first registered input format,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1102
 * if f is non-NULL, returns the next registered input format after f
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1103
 * or NULL if f is the last one.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1104
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1105
AVInputFormat  *av_iformat_next(AVInputFormat  *f);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1106
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1107
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1108
 * If f is NULL, returns the first registered output format,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1109
 * if f is non-NULL, returns the next registered output format after f
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1110
 * or NULL if f is the last one.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1111
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1112
AVOutputFormat *av_oformat_next(AVOutputFormat *f);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1113
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1114
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1115
 * Allocate an AVFormatContext.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1116
 * avformat_free_context() can be used to free the context and everything
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1117
 * allocated by the framework within it.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1118
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1119
AVFormatContext *avformat_alloc_context(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1120
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1121
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1122
 * Free an AVFormatContext and all its streams.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1123
 * @param s context to free
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1124
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1125
void avformat_free_context(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1126
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1127
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1128
 * Get the AVClass for AVFormatContext. It can be used in combination with
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1129
 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1130
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1131
 * @see av_opt_find().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1132
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1133
const AVClass *avformat_get_class(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1134
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1135
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1136
 * Add a new stream to a media file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1137
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1138
 * When demuxing, it is called by the demuxer in read_header(). If the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1139
 * flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1140
 * be called in read_packet().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1141
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1142
 * When muxing, should be called by the user before avformat_write_header().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1143
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1144
 * @param c If non-NULL, the AVCodecContext corresponding to the new stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1145
 * will be initialized to use this codec. This is needed for e.g. codec-specific
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1146
 * defaults to be set, so codec should be provided if it is known.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1147
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1148
 * @return newly created stream or NULL on error.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1149
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1150
AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1151
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1152
AVProgram *av_new_program(AVFormatContext *s, int id);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1153
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1154
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1155
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1156
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1157
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1158
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1159
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1160
 * @addtogroup lavf_decoding
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1161
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1162
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1163
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1164
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1165
 * Find AVInputFormat based on the short name of the input format.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1166
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1167
AVInputFormat *av_find_input_format(const char *short_name);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1168
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1169
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1170
 * Guess the file format.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1171
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1172
 * @param is_opened Whether the file is already opened; determines whether
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1173
 *                  demuxers with or without AVFMT_NOFILE are probed.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1174
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1175
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1176
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1177
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1178
 * Guess the file format.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1179
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1180
 * @param is_opened Whether the file is already opened; determines whether
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1181
 *                  demuxers with or without AVFMT_NOFILE are probed.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1182
 * @param score_max A probe score larger that this is required to accept a
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1183
 *                  detection, the variable is set to the actual detection
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1184
 *                  score afterwards.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1185
 *                  If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1186
 *                  to retry with a larger probe buffer.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1187
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1188
AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1189
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1190
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1191
 * Probe a bytestream to determine the input format. Each time a probe returns
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1192
 * with a score that is too low, the probe buffer size is increased and another
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1193
 * attempt is made. When the maximum probe size is reached, the input format
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1194
 * with the highest score is returned.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1195
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1196
 * @param pb the bytestream to probe
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1197
 * @param fmt the input format is put here
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1198
 * @param filename the filename of the stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1199
 * @param logctx the log context
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1200
 * @param offset the offset within the bytestream to probe from
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1201
 * @param max_probe_size the maximum probe buffer size (zero for default)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1202
 * @return 0 in case of success, a negative value corresponding to an
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1203
 * AVERROR code otherwise
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1204
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1205
int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1206
                          const char *filename, void *logctx,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1207
                          unsigned int offset, unsigned int max_probe_size);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1208
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1209
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1210
 * Open an input stream and read the header. The codecs are not opened.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1211
 * The stream must be closed with av_close_input_file().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1212
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1213
 * @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1214
 *           May be a pointer to NULL, in which case an AVFormatContext is allocated by this
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1215
 *           function and written into ps.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1216
 *           Note that a user-supplied AVFormatContext will be freed on failure.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1217
 * @param filename Name of the stream to open.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1218
 * @param fmt If non-NULL, this parameter forces a specific input format.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1219
 *            Otherwise the format is autodetected.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1220
 * @param options  A dictionary filled with AVFormatContext and demuxer-private options.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1221
 *                 On return this parameter will be destroyed and replaced with a dict containing
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1222
 *                 options that were not found. May be NULL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1223
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1224
 * @return 0 on success, a negative AVERROR on failure.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1225
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1226
 * @note If you want to use custom IO, preallocate the format context and set its pb field.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1227
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1228
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1229
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1230
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1231
 * Read packets of a media file to get stream information. This
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1232
 * is useful for file formats with no headers such as MPEG. This
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1233
 * function also computes the real framerate in case of MPEG-2 repeat
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1234
 * frame mode.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1235
 * The logical file position is not changed by this function;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1236
 * examined packets may be buffered for later processing.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1237
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1238
 * @param ic media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1239
 * @param options  If non-NULL, an ic.nb_streams long array of pointers to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1240
 *                 dictionaries, where i-th member contains options for
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1241
 *                 codec corresponding to i-th stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1242
 *                 On return each dictionary will be filled with options that were not found.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1243
 * @return >=0 if OK, AVERROR_xxx on error
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1244
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1245
 * @note this function isn't guaranteed to open all the codecs, so
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1246
 *       options being non-empty at return is a perfectly normal behavior.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1247
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1248
 * @todo Let the user decide somehow what information is needed so that
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1249
 *       we do not waste time getting stuff the user does not need.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1250
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1251
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1252
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1253
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1254
 * Find the "best" stream in the file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1255
 * The best stream is determined according to various heuristics as the most
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1256
 * likely to be what the user expects.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1257
 * If the decoder parameter is non-NULL, av_find_best_stream will find the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1258
 * default decoder for the stream's codec; streams for which no decoder can
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1259
 * be found are ignored.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1260
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1261
 * @param ic                media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1262
 * @param type              stream type: video, audio, subtitles, etc.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1263
 * @param wanted_stream_nb  user-requested stream number,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1264
 *                          or -1 for automatic selection
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1265
 * @param related_stream    try to find a stream related (eg. in the same
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1266
 *                          program) to this one, or -1 if none
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1267
 * @param decoder_ret       if non-NULL, returns the decoder for the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1268
 *                          selected stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1269
 * @param flags             flags; none are currently defined
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1270
 * @return  the non-negative stream number in case of success,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1271
 *          AVERROR_STREAM_NOT_FOUND if no stream with the requested type
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1272
 *          could be found,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1273
 *          AVERROR_DECODER_NOT_FOUND if streams were found but no decoder
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1274
 * @note  If av_find_best_stream returns successfully and decoder_ret is not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1275
 *        NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1276
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1277
int av_find_best_stream(AVFormatContext *ic,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1278
                        enum AVMediaType type,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1279
                        int wanted_stream_nb,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1280
                        int related_stream,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1281
                        AVCodec **decoder_ret,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1282
                        int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1283
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1284
#if FF_API_READ_PACKET
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1285
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1286
 * @deprecated use AVFMT_FLAG_NOFILLIN | AVFMT_FLAG_NOPARSE to read raw
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1287
 * unprocessed packets
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1288
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1289
 * Read a transport packet from a media file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1290
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1291
 * This function is obsolete and should never be used.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1292
 * Use av_read_frame() instead.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1293
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1294
 * @param s media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1295
 * @param pkt is filled
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1296
 * @return 0 if OK, AVERROR_xxx on error
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1297
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1298
attribute_deprecated
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1299
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1300
#endif
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1301
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1302
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1303
 * Return the next frame of a stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1304
 * This function returns what is stored in the file, and does not validate
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1305
 * that what is there are valid frames for the decoder. It will split what is
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1306
 * stored in the file into frames and return one for each call. It will not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1307
 * omit invalid data between valid frames so as to give the decoder the maximum
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1308
 * information possible for decoding.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1309
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1310
 * The returned packet is valid
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1311
 * until the next av_read_frame() or until av_close_input_file() and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1312
 * must be freed with av_free_packet. For video, the packet contains
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1313
 * exactly one frame. For audio, it contains an integer number of
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1314
 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1315
 * data). If the audio frames have a variable size (e.g. MPEG audio),
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1316
 * then it contains one frame.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1317
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1318
 * pkt->pts, pkt->dts and pkt->duration are always set to correct
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1319
 * values in AVStream.time_base units (and guessed if the format cannot
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1320
 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1321
 * has B-frames, so it is better to rely on pkt->dts if you do not
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1322
 * decompress the payload.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1323
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1324
 * @return 0 if OK, < 0 on error or end of file
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1325
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1326
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1327
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1328
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1329
 * Seek to the keyframe at timestamp.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1330
 * 'timestamp' in 'stream_index'.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1331
 * @param stream_index If stream_index is (-1), a default
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1332
 * stream is selected, and timestamp is automatically converted
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1333
 * from AV_TIME_BASE units to the stream specific time_base.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1334
 * @param timestamp Timestamp in AVStream.time_base units
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1335
 *        or, if no stream is specified, in AV_TIME_BASE units.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1336
 * @param flags flags which select direction and seeking mode
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1337
 * @return >= 0 on success
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1338
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1339
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1340
                  int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1341
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1342
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1343
 * Seek to timestamp ts.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1344
 * Seeking will be done so that the point from which all active streams
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1345
 * can be presented successfully will be closest to ts and within min/max_ts.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1346
 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1347
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1348
 * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1349
 * are the file position (this may not be supported by all demuxers).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1350
 * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1351
 * in the stream with stream_index (this may not be supported by all demuxers).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1352
 * Otherwise all timestamps are in units of the stream selected by stream_index
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1353
 * or if stream_index is -1, in AV_TIME_BASE units.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1354
 * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1355
 * keyframes (this may not be supported by all demuxers).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1356
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1357
 * @param stream_index index of the stream which is used as time base reference
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1358
 * @param min_ts smallest acceptable timestamp
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1359
 * @param ts target timestamp
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1360
 * @param max_ts largest acceptable timestamp
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1361
 * @param flags flags
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1362
 * @return >=0 on success, error code otherwise
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1363
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1364
 * @note This is part of the new seek API which is still under construction.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1365
 *       Thus do not use this yet. It may change at any time, do not expect
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1366
 *       ABI compatibility yet!
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1367
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1368
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1369
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1370
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1371
 * Start playing a network-based stream (e.g. RTSP stream) at the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1372
 * current position.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1373
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1374
int av_read_play(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1375
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1376
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1377
 * Pause a network-based stream (e.g. RTSP stream).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1378
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1379
 * Use av_read_play() to resume it.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1380
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1381
int av_read_pause(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1382
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1383
#if FF_API_CLOSE_INPUT_FILE
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1384
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1385
 * @deprecated use avformat_close_input()
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1386
 * Close a media file (but not its codecs).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1387
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1388
 * @param s media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1389
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1390
attribute_deprecated
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1391
void av_close_input_file(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1392
#endif
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1393
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1394
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1395
 * Close an opened input AVFormatContext. Free it and all its contents
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1396
 * and set *s to NULL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1397
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1398
void avformat_close_input(AVFormatContext **s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1399
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1400
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1401
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1402
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1403
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1404
#define AVSEEK_FLAG_BYTE     2 ///< seeking based on position in bytes
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1405
#define AVSEEK_FLAG_ANY      4 ///< seek to any frame, even non-keyframes
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1406
#define AVSEEK_FLAG_FRAME    8 ///< seeking based on frame number
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1407
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1408
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1409
 * @addtogroup lavf_encoding
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1410
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1411
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1412
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1413
 * Allocate the stream private data and write the stream header to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1414
 * an output media file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1415
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1416
 * @param s Media file handle, must be allocated with avformat_alloc_context().
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1417
 *          Its oformat field must be set to the desired output format;
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1418
 *          Its pb field must be set to an already openened AVIOContext.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1419
 * @param options  An AVDictionary filled with AVFormatContext and muxer-private options.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1420
 *                 On return this parameter will be destroyed and replaced with a dict containing
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1421
 *                 options that were not found. May be NULL.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1422
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1423
 * @return 0 on success, negative AVERROR on failure.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1424
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1425
 * @see av_opt_find, av_dict_set, avio_open, av_oformat_next.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1426
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1427
int avformat_write_header(AVFormatContext *s, AVDictionary **options);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1428
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1429
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1430
 * Write a packet to an output media file.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1431
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1432
 * The packet shall contain one audio or video frame.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1433
 * The packet must be correctly interleaved according to the container
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1434
 * specification, if not then av_interleaved_write_frame must be used.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1435
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1436
 * @param s media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1437
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1438
 *            dts/pts, ...
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1439
 *            This can be NULL (at any time, not just at the end), in
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1440
 *            order to immediately flush data buffered within the muxer,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1441
 *            for muxers that buffer up data internally before writing it
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1442
 *            to the output.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1443
 * @return < 0 on error, = 0 if OK, 1 if flushed and there is no more data to flush
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1444
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1445
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1446
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1447
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1448
 * Write a packet to an output media file ensuring correct interleaving.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1449
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1450
 * The packet must contain one audio or video frame.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1451
 * If the packets are already correctly interleaved, the application should
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1452
 * call av_write_frame() instead as it is slightly faster. It is also important
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1453
 * to keep in mind that completely non-interleaved input will need huge amounts
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1454
 * of memory to interleave with this, so it is preferable to interleave at the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1455
 * demuxer level.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1456
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1457
 * @param s media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1458
 * @param pkt The packet containing the data to be written. Libavformat takes
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1459
 * ownership of the data and will free it when it sees fit using the packet's
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1460
 * This can be NULL (at any time, not just at the end), to flush the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1461
 * interleaving queues.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1462
 * @ref AVPacket.destruct "destruct" field. The caller must not access the data
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1463
 * after this function returns, as it may already be freed.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1464
 * Packet's @ref AVPacket.stream_index "stream_index" field must be set to the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1465
 * index of the corresponding stream in @ref AVFormatContext.streams
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1466
 * "s.streams".
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1467
 * It is very strongly recommended that timing information (@ref AVPacket.pts
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1468
 * "pts", @ref AVPacket.dts "dts" @ref AVPacket.duration "duration") is set to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1469
 * correct values.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1470
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1471
 * @return 0 on success, a negative AVERROR on error.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1472
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1473
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1474
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1475
#if FF_API_INTERLEAVE_PACKET
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1476
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1477
 * @deprecated this function was never meant to be called by the user
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1478
 * programs.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1479
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1480
attribute_deprecated
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1481
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1482
                                 AVPacket *pkt, int flush);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1483
#endif
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1484
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1485
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1486
 * Write the stream trailer to an output media file and free the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1487
 * file private data.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1488
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1489
 * May only be called after a successful call to avformat_write_header.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1490
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1491
 * @param s media file handle
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1492
 * @return 0 if OK, AVERROR_xxx on error
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1493
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1494
int av_write_trailer(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1495
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1496
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1497
 * Return the output format in the list of registered output formats
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1498
 * which best matches the provided parameters, or return NULL if
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1499
 * there is no match.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1500
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1501
 * @param short_name if non-NULL checks if short_name matches with the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1502
 * names of the registered formats
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1503
 * @param filename if non-NULL checks if filename terminates with the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1504
 * extensions of the registered formats
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1505
 * @param mime_type if non-NULL checks if mime_type matches with the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1506
 * MIME type of the registered formats
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1507
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1508
AVOutputFormat *av_guess_format(const char *short_name,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1509
                                const char *filename,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1510
                                const char *mime_type);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1511
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1512
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1513
 * Guess the codec ID based upon muxer and filename.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1514
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1515
enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1516
                            const char *filename, const char *mime_type,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1517
                            enum AVMediaType type);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1518
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1519
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1520
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1521
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1522
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1523
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1524
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1525
 * @defgroup lavf_misc Utility functions
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1526
 * @ingroup libavf
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1527
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1528
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1529
 * Miscelaneous utility functions related to both muxing and demuxing
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1530
 * (or neither).
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1531
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1532
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1533
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1534
 * Send a nice hexadecimal dump of a buffer to the specified file stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1535
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1536
 * @param f The file stream pointer where the dump should be sent to.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1537
 * @param buf buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1538
 * @param size buffer size
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1539
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1540
 * @see av_hex_dump_log, av_pkt_dump2, av_pkt_dump_log2
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1541
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1542
void av_hex_dump(FILE *f, const uint8_t *buf, int size);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1543
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1544
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1545
 * Send a nice hexadecimal dump of a buffer to the log.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1546
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1547
 * @param avcl A pointer to an arbitrary struct of which the first field is a
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1548
 * pointer to an AVClass struct.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1549
 * @param level The importance level of the message, lower values signifying
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1550
 * higher importance.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1551
 * @param buf buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1552
 * @param size buffer size
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1553
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1554
 * @see av_hex_dump, av_pkt_dump2, av_pkt_dump_log2
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1555
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1556
void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1557
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1558
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1559
 * Send a nice dump of a packet to the specified file stream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1560
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1561
 * @param f The file stream pointer where the dump should be sent to.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1562
 * @param pkt packet to dump
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1563
 * @param dump_payload True if the payload must be displayed, too.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1564
 * @param st AVStream that the packet belongs to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1565
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1566
void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1567
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1568
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1569
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1570
 * Send a nice dump of a packet to the log.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1571
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1572
 * @param avcl A pointer to an arbitrary struct of which the first field is a
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1573
 * pointer to an AVClass struct.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1574
 * @param level The importance level of the message, lower values signifying
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1575
 * higher importance.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1576
 * @param pkt packet to dump
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1577
 * @param dump_payload True if the payload must be displayed, too.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1578
 * @param st AVStream that the packet belongs to
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1579
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1580
void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1581
                      AVStream *st);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1582
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1583
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1584
 * Get the AVCodecID for the given codec tag tag.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1585
 * If no codec id is found returns AV_CODEC_ID_NONE.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1586
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1587
 * @param tags list of supported codec_id-codec_tag pairs, as stored
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1588
 * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1589
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1590
enum AVCodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1591
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1592
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1593
 * Get the codec tag for the given codec id id.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1594
 * If no codec tag is found returns 0.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1595
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1596
 * @param tags list of supported codec_id-codec_tag pairs, as stored
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1597
 * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1598
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1599
unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum AVCodecID id);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1600
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1601
int av_find_default_stream_index(AVFormatContext *s);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1602
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1603
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1604
 * Get the index for a specific timestamp.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1605
 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1606
 *                 to the timestamp which is <= the requested one, if backward
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1607
 *                 is 0, then it will be >=
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1608
 *              if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1609
 * @return < 0 if no such timestamp could be found
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1610
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1611
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1612
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1613
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1614
 * Add an index entry into a sorted list. Update the entry if the list
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1615
 * already contains it.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1616
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1617
 * @param timestamp timestamp in the time base of the given stream
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1618
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1619
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1620
                       int size, int distance, int flags);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1621
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1622
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1623
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1624
 * Split a URL string into components.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1625
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1626
 * The pointers to buffers for storing individual components may be null,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1627
 * in order to ignore that component. Buffers for components not found are
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1628
 * set to empty strings. If the port is not found, it is set to a negative
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1629
 * value.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1630
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1631
 * @param proto the buffer for the protocol
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1632
 * @param proto_size the size of the proto buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1633
 * @param authorization the buffer for the authorization
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1634
 * @param authorization_size the size of the authorization buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1635
 * @param hostname the buffer for the host name
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1636
 * @param hostname_size the size of the hostname buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1637
 * @param port_ptr a pointer to store the port number in
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1638
 * @param path the buffer for the path
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1639
 * @param path_size the size of the path buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1640
 * @param url the URL to split
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1641
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1642
void av_url_split(char *proto,         int proto_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1643
                  char *authorization, int authorization_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1644
                  char *hostname,      int hostname_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1645
                  int *port_ptr,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1646
                  char *path,          int path_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1647
                  const char *url);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1648
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1649
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1650
void av_dump_format(AVFormatContext *ic,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1651
                    int index,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1652
                    const char *url,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1653
                    int is_output);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1654
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1655
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1656
 * Return in 'buf' the path with '%d' replaced by a number.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1657
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1658
 * Also handles the '%0nd' format where 'n' is the total number
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1659
 * of digits and '%%'.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1660
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1661
 * @param buf destination buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1662
 * @param buf_size destination buffer size
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1663
 * @param path numbered sequence string
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1664
 * @param number frame number
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1665
 * @return 0 if OK, -1 on format error
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1666
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1667
int av_get_frame_filename(char *buf, int buf_size,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1668
                          const char *path, int number);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1669
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1670
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1671
 * Check whether filename actually is a numbered sequence generator.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1672
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1673
 * @param filename possible numbered sequence string
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1674
 * @return 1 if a valid numbered sequence string, 0 otherwise
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1675
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1676
int av_filename_number_test(const char *filename);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1677
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1678
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1679
 * Generate an SDP for an RTP session.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1680
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1681
 * @param ac array of AVFormatContexts describing the RTP streams. If the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1682
 *           array is composed by only one context, such context can contain
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1683
 *           multiple AVStreams (one AVStream per RTP stream). Otherwise,
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1684
 *           all the contexts in the array (an AVCodecContext per RTP stream)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1685
 *           must contain only one AVStream.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1686
 * @param n_files number of AVCodecContexts contained in ac
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1687
 * @param buf buffer where the SDP will be stored (must be allocated by
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1688
 *            the caller)
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1689
 * @param size the size of the buffer
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1690
 * @return 0 if OK, AVERROR_xxx on error
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1691
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1692
int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1693
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1694
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1695
 * Return a positive value if the given filename has one of the given
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1696
 * extensions, 0 otherwise.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1697
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1698
 * @param extensions a comma-separated list of filename extensions
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1699
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1700
int av_match_ext(const char *filename, const char *extensions);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1701
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1702
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1703
 * Test if the given container can store a codec.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1704
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1705
 * @param std_compliance standards compliance level, one of FF_COMPLIANCE_*
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1706
 *
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1707
 * @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1708
 *         A negative number if this information is not available.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1709
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1710
int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1711
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1712
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1713
 * @defgroup riff_fourcc RIFF FourCCs
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1714
 * @{
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1715
 * Get the tables mapping RIFF FourCCs to libavcodec AVCodecIDs. The tables are
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1716
 * meant to be passed to av_codec_get_id()/av_codec_get_tag() as in the
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1717
 * following code:
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1718
 * @code
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1719
 * uint32_t tag = MKTAG('H', '2', '6', '4');
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1720
 * const struct AVCodecTag *table[] = { avformat_get_riff_video_tags(), 0 };
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1721
 * enum AVCodecID id = av_codec_get_id(table, tag);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1722
 * @endcode
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1723
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1724
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1725
 * @return the table mapping RIFF FourCCs for video to libavcodec AVCodecID.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1726
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1727
const struct AVCodecTag *avformat_get_riff_video_tags(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1728
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1729
 * @return the table mapping RIFF FourCCs for audio to AVCodecID.
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1730
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1731
const struct AVCodecTag *avformat_get_riff_audio_tags(void);
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1732
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1733
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1734
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1735
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1736
/**
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1737
 * @}
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1738
 */
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1739
7ac83d79b897 support video recording on windows with automation and headers
koda
parents:
diff changeset
  1740
#endif /* AVFORMAT_AVFORMAT_H */