--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/avwrapper.c Mon Jun 04 21:32:30 2012 +0400
@@ -0,0 +1,470 @@
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include "libavformat/avformat.h"
+
+static AVFormatContext* g_pContainer;
+static AVOutputFormat* g_pFormat;
+static AVStream* g_pAStream;
+static AVStream* g_pVStream;
+static AVFrame* g_pAFrame;
+static AVFrame* g_pVFrame;
+static AVCodec* g_pACodec;
+static AVCodec* g_pVCodec;
+static AVCodecContext* g_pAudio;
+static AVCodecContext* g_pVideo;
+
+static int g_Width, g_Height, g_Framerate;
+static int g_Frequency, g_Channels;
+
+static FILE* g_pSoundFile;
+static int16_t* g_pSamples;
+static int g_NumSamples;
+
+/*
+Initially I wrote code for latest ffmpeg, but on Linux (Ubuntu)
+only older version is available from repository. That's why you see here
+all of this #if LIBAVCODEC_VERSION_MAJOR < 54.
+Actually, it may be possible to remove code for newer version
+and use only code for older version.
+*/
+
+#if LIBAVCODEC_VERSION_MAJOR < 54
+#define OUTBUFFER_SIZE 200000
+static uint8_t g_OutBuffer[OUTBUFFER_SIZE];
+#endif
+
+// pointer to function from hwengine (uUtils.pas)
+static void (*AddFileLogRaw)(const char* pString);
+
+static void FatalError(const char* pFmt, ...)
+{
+ const char Buffer[1024];
+ va_list VaArgs;
+
+ va_start(VaArgs, pFmt);
+ vsnprintf(Buffer, 1024, pFmt, VaArgs);
+ va_end(VaArgs);
+
+ AddFileLogRaw("Error in av-wrapper: ");
+ AddFileLogRaw(Buffer);
+ AddFileLogRaw("\n");
+ exit(1);
+}
+
+// Function to be called from libav for logging.
+// Note: libav can call LogCallback from different threads
+// (there is mutex in AddFileLogRaw).
+static void LogCallback(void* p, int Level, const char* pFmt, va_list VaArgs)
+{
+ const char Buffer[1024];
+
+ vsnprintf(Buffer, 1024, pFmt, VaArgs);
+ AddFileLogRaw(Buffer);
+}
+
+static void Log(const char* pFmt, ...)
+{
+ const char Buffer[1024];
+ va_list VaArgs;
+
+ va_start(VaArgs, pFmt);
+ vsnprintf(Buffer, 1024, pFmt, VaArgs);
+ va_end(VaArgs);
+
+ AddFileLogRaw(Buffer);
+}
+
+static void AddAudioStream(enum CodecID codec_id)
+{
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ g_pAStream = avformat_new_stream(g_pContainer, g_pACodec);
+#else
+ g_pAStream = av_new_stream(g_pContainer, 1);
+#endif
+ if(!g_pAStream)
+ FatalError("Could not allocate audio stream");
+ g_pAStream->id = 1;
+
+ g_pAudio = g_pAStream->codec;
+ avcodec_get_context_defaults3(g_pAudio, g_pACodec);
+ g_pAudio->codec_id = codec_id;
+
+ // put parameters
+ g_pAudio->sample_fmt = AV_SAMPLE_FMT_S16;
+ // pContext->bit_rate = 128000;
+ g_pAudio->sample_rate = g_Frequency;
+ g_pAudio->channels = g_Channels;
+
+ // some formats want stream headers to be separate
+ if (g_pFormat->flags & AVFMT_GLOBALHEADER)
+ g_pAudio->flags |= CODEC_FLAG_GLOBAL_HEADER;
+
+ // open it
+ if (avcodec_open2(g_pAudio, g_pACodec, NULL) < 0)
+ FatalError("Could not open audio codec %s", g_pACodec->long_name);
+
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ if (g_pACodec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)
+#else
+ if (g_pAudio->frame_size == 0)
+#endif
+ g_NumSamples = 4096;
+ else
+ g_NumSamples = g_pAudio->frame_size;
+ g_pSamples = (int16_t*)av_malloc(g_NumSamples*g_Channels*sizeof(int16_t));
+ g_pAFrame = avcodec_alloc_frame();
+ if (!g_pAFrame)
+ FatalError("Could not allocate frame");
+}
+
+// returns non-zero if there is more sound
+static int WriteAudioFrame()
+{
+ AVPacket Packet = { 0 };
+ av_init_packet(&Packet);
+
+ int NumSamples = fread(g_pSamples, 2*g_Channels, g_NumSamples, g_pSoundFile);
+
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ AVFrame* pFrame = NULL;
+ if (NumSamples > 0)
+ {
+ g_pAFrame->nb_samples = NumSamples;
+ avcodec_fill_audio_frame(g_pAFrame, g_Channels, AV_SAMPLE_FMT_S16,
+ (uint8_t*)g_pSamples, NumSamples*2*g_Channels, 1);
+ pFrame = g_pAFrame;
+ }
+ // when NumSamples == 0 we still need to call encode_audio2 to flush
+ int got_packet;
+ if (avcodec_encode_audio2(g_pAudio, &Packet, pFrame, &got_packet) != 0)
+ FatalError("avcodec_encode_audio2 failed");
+ if (!got_packet)
+ return 0;
+#else
+ if (NumSamples == 0)
+ return 0;
+ int BufferSize = OUTBUFFER_SIZE;
+ if (g_pAudio->frame_size == 0)
+ BufferSize = NumSamples*g_Channels*2;
+ Packet.size = avcodec_encode_audio(g_pAudio, g_OutBuffer, BufferSize, g_pSamples);
+ if (Packet.size == 0)
+ return 1;
+ if (g_pAudio->coded_frame && g_pAudio->coded_frame->pts != AV_NOPTS_VALUE)
+ Packet.pts = av_rescale_q(g_pAudio->coded_frame->pts, g_pAudio->time_base, g_pAStream->time_base);
+ Packet.flags |= AV_PKT_FLAG_KEY;
+ Packet.data = g_OutBuffer;
+#endif
+
+ // Write the compressed frame to the media file.
+ Packet.stream_index = g_pAStream->index;
+ if (av_interleaved_write_frame(g_pContainer, &Packet) != 0)
+ FatalError("Error while writing audio frame");
+ return 1;
+}
+
+// add a video output stream
+static void AddVideoStream(enum CodecID codec_id)
+{
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ g_pVStream = avformat_new_stream(g_pContainer, g_pVCodec);
+#else
+ g_pVStream = av_new_stream(g_pContainer, 0);
+#endif
+ if (!g_pVStream)
+ FatalError("Could not allocate video stream");
+
+ g_pVideo = g_pVStream->codec;
+ avcodec_get_context_defaults3( g_pVideo, g_pVCodec );
+ g_pVideo->codec_id = codec_id;
+
+ // put parameters
+ // resolution must be a multiple of two
+ g_pVideo->width = g_Width;
+ g_pVideo->height = g_Height;
+ /* time base: this is the fundamental unit of time (in seconds) in terms
+ of which frame timestamps are represented. for fixed-fps content,
+ timebase should be 1/framerate and timestamp increments should be
+ identically 1. */
+ g_pVideo->time_base.den = g_Framerate;
+ g_pVideo->time_base.num = 1;
+ //g_pVideo->gop_size = 12; /* emit one intra frame every twelve frames at most */
+ g_pVideo->pix_fmt = PIX_FMT_YUV420P;
+
+ // some formats want stream headers to be separate
+ if (g_pFormat->flags & AVFMT_GLOBALHEADER)
+ g_pVideo->flags |= CODEC_FLAG_GLOBAL_HEADER;
+
+ AVDictionary* pDict = NULL;
+ if (codec_id == CODEC_ID_H264)
+ {
+ // av_dict_set(&pDict, "tune", "animation", 0);
+ // av_dict_set(&pDict, "preset", "veryslow", 0);
+ av_dict_set(&pDict, "crf", "20", 0);
+ }
+ else
+ {
+ g_pVideo->flags |= CODEC_FLAG_QSCALE;
+ // g_pVideo->bit_rate = g_Width*g_Height*g_Framerate/4;
+ g_pVideo->global_quality = 15*FF_QP2LAMBDA;
+ }
+
+ // open the codec
+ if (avcodec_open2(g_pVideo, g_pVCodec, &pDict) < 0)
+ FatalError("Could not open video codec %s", g_pVCodec->long_name);
+
+ g_pVFrame = avcodec_alloc_frame();
+ if (!g_pVFrame)
+ FatalError("Could not allocate frame");
+
+ g_pVFrame->linesize[0] = g_Width;
+ g_pVFrame->linesize[1] = g_Width/2;
+ g_pVFrame->linesize[2] = g_Width/2;
+ g_pVFrame->linesize[3] = 0;
+}
+
+static int WriteFrame( AVFrame* pFrame )
+{
+ double AudioTime, VideoTime;
+
+ // write interleaved audio frame
+ if (g_pAStream)
+ {
+ VideoTime = (double)g_pVStream->pts.val*g_pVStream->time_base.num/g_pVStream->time_base.den;
+ do
+ AudioTime = (double)g_pAStream->pts.val*g_pAStream->time_base.num/g_pAStream->time_base.den;
+ while (AudioTime < VideoTime && WriteAudioFrame());
+ }
+
+ AVPacket Packet;
+ av_init_packet(&Packet);
+ Packet.data = NULL;
+ Packet.size = 0;
+
+ g_pVFrame->pts++;
+ if (g_pFormat->flags & AVFMT_RAWPICTURE)
+ {
+ /* raw video case. The API will change slightly in the near
+ future for that. */
+ Packet.flags |= AV_PKT_FLAG_KEY;
+ Packet.stream_index = g_pVStream->index;
+ Packet.data = (uint8_t*)pFrame;
+ Packet.size = sizeof(AVPicture);
+
+ if (av_interleaved_write_frame(g_pContainer, &Packet) != 0)
+ FatalError("Error while writing video frame");
+ return 0;
+ }
+ else
+ {
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ int got_packet;
+ if (avcodec_encode_video2(g_pVideo, &Packet, pFrame, &got_packet) < 0)
+ FatalError("avcodec_encode_video2 failed");
+ if (!got_packet)
+ return 0;
+
+ if (Packet.pts != AV_NOPTS_VALUE)
+ Packet.pts = av_rescale_q(Packet.pts, g_pVideo->time_base, g_pVStream->time_base);
+ if (Packet.dts != AV_NOPTS_VALUE)
+ Packet.dts = av_rescale_q(Packet.dts, g_pVideo->time_base, g_pVStream->time_base);
+#else
+ Packet.size = avcodec_encode_video(g_pVideo, g_OutBuffer, OUTBUFFER_SIZE, pFrame);
+ if (Packet.size < 0)
+ FatalError("avcodec_encode_video failed");
+ if (Packet.size == 0)
+ return 0;
+
+ if( g_pVideo->coded_frame->pts != AV_NOPTS_VALUE)
+ Packet.pts = av_rescale_q(g_pVideo->coded_frame->pts, g_pVideo->time_base, g_pVStream->time_base);
+ if( g_pVideo->coded_frame->key_frame )
+ Packet.flags |= AV_PKT_FLAG_KEY;
+ Packet.data = g_OutBuffer;
+#endif
+ // write the compressed frame in the media file
+ Packet.stream_index = g_pVStream->index;
+ if (av_interleaved_write_frame(g_pContainer, &Packet) != 0)
+ FatalError("Error while writing video frame");
+
+ return 1;
+ }
+}
+
+void AVWrapper_WriteFrame(uint8_t* pY, uint8_t* pCb, uint8_t* pCr)
+{
+ g_pVFrame->data[0] = pY;
+ g_pVFrame->data[1] = pCb;
+ g_pVFrame->data[2] = pCr;
+ WriteFrame(g_pVFrame);
+}
+
+void AVWrapper_GetList()
+{
+ // initialize libav and register all codecs and formats
+ av_register_all();
+
+#if 0
+ AVOutputFormat* pFormat = NULL;
+ while (pFormat = av_oformat_next(pFormat))
+ {
+ Log("%s; %s; %s;\n", pFormat->name, pFormat->long_name, pFormat->mime_type);
+
+ AVCodec* pCodec = NULL;
+ while (pCodec = av_codec_next(pCodec))
+ {
+ if (!av_codec_is_encoder(pCodec))
+ continue;
+ if (avformat_query_codec(pFormat, pCodec->id, FF_COMPLIANCE_NORMAL) != 1)
+ continue;
+ if (pCodec->type = AVMEDIA_TYPE_VIDEO)
+ {
+ if (pCodec->supported_framerate != NULL)
+ continue;
+ Log(" Video: %s; %s;\n", pCodec->name, pCodec->long_name);
+ }
+ if (pCodec->type = AVMEDIA_TYPE_AUDIO)
+ {
+ /* if (pCodec->supported_samplerates == NULL)
+ continue;
+ int i;
+ for(i = 0; i <)
+ supported_samplerates*/
+ Log(" Audio: %s; %s;\n", pCodec->name, pCodec->long_name);
+ }
+ }
+ /* struct AVCodecTag** pTags = pCur->codec_tag;
+ int i;
+ for (i = 0; ; i++)
+ {
+ enum CodecID id = av_codec_get_id(pTags, i);
+ if (id == CODEC_ID_NONE)
+ break;
+ AVCodec* pCodec = avcodec_find_encoder(id);
+ Log(" %i: %s; %s;\n", id, pCodec->name, pCodec->long_name);
+ }*/
+ }
+#endif
+}
+
+void AVWrapper_Init(void (*pAddFileLogRaw)(const char*), const char* pFilename, const char* pSoundFile, int Width, int Height, int Framerate, int Frequency, int Channels)
+{
+ AddFileLogRaw = pAddFileLogRaw;
+ av_log_set_callback( &LogCallback );
+
+ g_Width = Width;
+ g_Height = Height;
+ g_Framerate = Framerate;
+ g_Frequency = Frequency;
+ g_Channels = Channels;
+
+ // initialize libav and register all codecs and formats
+ av_register_all();
+
+ AVWrapper_GetList();
+
+ // allocate the output media context
+#if LIBAVCODEC_VERSION_MAJOR >= 54
+ avformat_alloc_output_context2(&g_pContainer, NULL, "mp4", pFilename);
+#else
+ g_pFormat = av_guess_format(NULL, pFilename, NULL);
+ if (!g_pFormat)
+ FatalError("guess_format");
+
+ // allocate the output media context
+ g_pContainer = avformat_alloc_context();
+ if (g_pContainer)
+ {
+ g_pContainer->oformat = g_pFormat;
+ snprintf(g_pContainer->filename, sizeof(g_pContainer->filename), "%s", pFilename);
+ }
+#endif
+ if (!g_pContainer)
+ FatalError("Could not allocate output context");
+
+ g_pFormat = g_pContainer->oformat;
+
+ enum CodecID VideoCodecID = g_pFormat->video_codec;//CODEC_ID_H264;
+ enum CodecID AudioCodecID = g_pFormat->audio_codec;
+
+ g_pVStream = NULL;
+ g_pAStream = NULL;
+ if (VideoCodecID != CODEC_ID_NONE)
+ {
+ g_pVCodec = avcodec_find_encoder(VideoCodecID);
+ if (!g_pVCodec)
+ FatalError("Video codec not found");
+ AddVideoStream(VideoCodecID);
+ }
+
+ if (AudioCodecID != CODEC_ID_NONE)
+ {
+ g_pACodec = avcodec_find_encoder(AudioCodecID);
+ if (!g_pACodec)
+ FatalError("Audio codec not found");
+ AddAudioStream(AudioCodecID);
+ }
+
+ if (g_pAStream)
+ {
+ g_pSoundFile = fopen(pSoundFile, "rb");
+ if (!g_pSoundFile)
+ FatalError("Could not open %s", pSoundFile);
+ }
+
+ // write format info to log
+ av_dump_format(g_pContainer, 0, pFilename, 1);
+
+ // open the output file, if needed
+ if (!(g_pFormat->flags & AVFMT_NOFILE))
+ {
+ if (avio_open(&g_pContainer->pb, pFilename, AVIO_FLAG_WRITE) < 0)
+ FatalError("Could not open output file (%s)", pFilename);
+ }
+
+ // write the stream header, if any
+ avformat_write_header(g_pContainer, NULL);
+ g_pVFrame->pts = -1;
+}
+
+void AVWrapper_Close()
+{
+ // output buffered frames
+ if (g_pVCodec->capabilities & CODEC_CAP_DELAY)
+ while( WriteFrame(NULL) );
+ // output any remaining audio
+ while( WriteAudioFrame() );
+
+ // write the trailer, if any.
+ av_write_trailer(g_pContainer);
+
+ // close each codec
+ if( g_pVStream )
+ {
+ avcodec_close(g_pVStream->codec);
+ av_free(g_pVFrame);
+ }
+ if( g_pAStream )
+ {
+ avcodec_close(g_pAStream->codec);
+ av_free(g_pAFrame);
+ av_free(g_pSamples);
+ fclose(g_pSoundFile);
+ }
+
+ // free the streams
+ int i;
+ for (i = 0; i < g_pContainer->nb_streams; i++)
+ {
+ av_freep(&g_pContainer->streams[i]->codec);
+ av_freep(&g_pContainer->streams[i]);
+ }
+
+ // close the output file
+ if (!(g_pFormat->flags & AVFMT_NOFILE))
+ avio_close(g_pContainer->pb);
+
+ // free the stream
+ av_free(g_pContainer);
+}