hedgewars: comparison misc/winutils/include/libavcodec/avcodec.h

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-:90a79670de52
+:262003f2e19a
-/*
-* copyright (c) 2001 Fabrice Bellard
-*
-* This file is part of Libav.
-*
-* Libav is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public
-* License as published by the Free Software Foundation; either
-* version 2.1 of the License, or (at your option) any later version.
-*
-* Libav is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public
-* License along with Libav; if not, write to the Free Software
-* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-*/
-#ifndef AVCODEC_AVCODEC_H
-#define AVCODEC_AVCODEC_H
-/**
-* @file
-* external API header
-*/
-#include <errno.h>
-#include "libavutil/samplefmt.h"
-#include "libavutil/avutil.h"
-#include "libavutil/cpu.h"
-#include "libavutil/dict.h"
-#include "libavutil/log.h"
-#include "libavutil/pixfmt.h"
-#include "libavutil/rational.h"
-#include "libavcodec/version.h"
-/**
-* @defgroup libavc Encoding/Decoding Library
-* @{
-*
-* @defgroup lavc_decoding Decoding
-* @{
-* @}
-*
-* @defgroup lavc_encoding Encoding
-* @{
-* @}
-*
-* @defgroup lavc_codec Codecs
-* @{
-* @defgroup lavc_codec_native Native Codecs
-* @{
-* @}
-* @defgroup lavc_codec_wrappers External library wrappers
-* @{
-* @}
-* @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
-* @{
-* @}
-* @}
-* @defgroup lavc_internal Internal
-* @{
-* @}
-* @}
-*
-*/
-/**
-* @defgroup lavc_core Core functions/structures.
-* @ingroup libavc
-*
-* Basic definitions, functions for querying libavcodec capabilities,
-* allocating core structures, etc.
-* @{
-*/
-/**
-* Identify the syntax and semantics of the bitstream.
-* The principle is roughly:
-* Two decoders with the same ID can decode the same streams.
-* Two encoders with the same ID can encode compatible streams.
-* There may be slight deviations from the principle due to implementation
-* details.
-*
-* If you add a codec ID to this list, add it so that
-* 1. no value of a existing codec ID changes (that would break ABI),
-* 2. it is as close as possible to similar codecs.
-*
-* After adding new codec IDs, do not forget to add an entry to the codec
-* descriptor list and bump libavcodec minor version.
-*/
-enum AVCodecID {
-AV_CODEC_ID_NONE,
-/* video codecs */
-AV_CODEC_ID_MPEG1VIDEO,
-AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
-AV_CODEC_ID_MPEG2VIDEO_XVMC,
-AV_CODEC_ID_H261,
-AV_CODEC_ID_H263,
-AV_CODEC_ID_RV10,
-AV_CODEC_ID_RV20,
-AV_CODEC_ID_MJPEG,
-AV_CODEC_ID_MJPEGB,
-AV_CODEC_ID_LJPEG,
-AV_CODEC_ID_SP5X,
-AV_CODEC_ID_JPEGLS,
-AV_CODEC_ID_MPEG4,
-AV_CODEC_ID_RAWVIDEO,
-AV_CODEC_ID_MSMPEG4V1,
-AV_CODEC_ID_MSMPEG4V2,
-AV_CODEC_ID_MSMPEG4V3,
-AV_CODEC_ID_WMV1,
-AV_CODEC_ID_WMV2,
-AV_CODEC_ID_H263P,
-AV_CODEC_ID_H263I,
-AV_CODEC_ID_FLV1,
-AV_CODEC_ID_SVQ1,
-AV_CODEC_ID_SVQ3,
-AV_CODEC_ID_DVVIDEO,
-AV_CODEC_ID_HUFFYUV,
-AV_CODEC_ID_CYUV,
-AV_CODEC_ID_H264,
-AV_CODEC_ID_INDEO3,
-AV_CODEC_ID_VP3,
-AV_CODEC_ID_THEORA,
-AV_CODEC_ID_ASV1,
-AV_CODEC_ID_ASV2,
-AV_CODEC_ID_FFV1,
-AV_CODEC_ID_4XM,
-AV_CODEC_ID_VCR1,
-AV_CODEC_ID_CLJR,
-AV_CODEC_ID_MDEC,
-AV_CODEC_ID_ROQ,
-AV_CODEC_ID_INTERPLAY_VIDEO,
-AV_CODEC_ID_XAN_WC3,
-AV_CODEC_ID_XAN_WC4,
-AV_CODEC_ID_RPZA,
-AV_CODEC_ID_CINEPAK,
-AV_CODEC_ID_WS_VQA,
-AV_CODEC_ID_MSRLE,
-AV_CODEC_ID_MSVIDEO1,
-AV_CODEC_ID_IDCIN,
-AV_CODEC_ID_8BPS,
-AV_CODEC_ID_SMC,
-AV_CODEC_ID_FLIC,
-AV_CODEC_ID_TRUEMOTION1,
-AV_CODEC_ID_VMDVIDEO,
-AV_CODEC_ID_MSZH,
-AV_CODEC_ID_ZLIB,
-AV_CODEC_ID_QTRLE,
-AV_CODEC_ID_SNOW,
-AV_CODEC_ID_TSCC,
-AV_CODEC_ID_ULTI,
-AV_CODEC_ID_QDRAW,
-AV_CODEC_ID_VIXL,
-AV_CODEC_ID_QPEG,
-AV_CODEC_ID_PNG,
-AV_CODEC_ID_PPM,
-AV_CODEC_ID_PBM,
-AV_CODEC_ID_PGM,
-AV_CODEC_ID_PGMYUV,
-AV_CODEC_ID_PAM,
-AV_CODEC_ID_FFVHUFF,
-AV_CODEC_ID_RV30,
-AV_CODEC_ID_RV40,
-AV_CODEC_ID_VC1,
-AV_CODEC_ID_WMV3,
-AV_CODEC_ID_LOCO,
-AV_CODEC_ID_WNV1,
-AV_CODEC_ID_AASC,
-AV_CODEC_ID_INDEO2,
-AV_CODEC_ID_FRAPS,
-AV_CODEC_ID_TRUEMOTION2,
-AV_CODEC_ID_BMP,
-AV_CODEC_ID_CSCD,
-AV_CODEC_ID_MMVIDEO,
-AV_CODEC_ID_ZMBV,
-AV_CODEC_ID_AVS,
-AV_CODEC_ID_SMACKVIDEO,
-AV_CODEC_ID_NUV,
-AV_CODEC_ID_KMVC,
-AV_CODEC_ID_FLASHSV,
-AV_CODEC_ID_CAVS,
-AV_CODEC_ID_JPEG2000,
-AV_CODEC_ID_VMNC,
-AV_CODEC_ID_VP5,
-AV_CODEC_ID_VP6,
-AV_CODEC_ID_VP6F,
-AV_CODEC_ID_TARGA,
-AV_CODEC_ID_DSICINVIDEO,
-AV_CODEC_ID_TIERTEXSEQVIDEO,
-AV_CODEC_ID_TIFF,
-AV_CODEC_ID_GIF,
-AV_CODEC_ID_DXA,
-AV_CODEC_ID_DNXHD,
-AV_CODEC_ID_THP,
-AV_CODEC_ID_SGI,
-AV_CODEC_ID_C93,
-AV_CODEC_ID_BETHSOFTVID,
-AV_CODEC_ID_PTX,
-AV_CODEC_ID_TXD,
-AV_CODEC_ID_VP6A,
-AV_CODEC_ID_AMV,
-AV_CODEC_ID_VB,
-AV_CODEC_ID_PCX,
-AV_CODEC_ID_SUNRAST,
-AV_CODEC_ID_INDEO4,
-AV_CODEC_ID_INDEO5,
-AV_CODEC_ID_MIMIC,
-AV_CODEC_ID_RL2,
-AV_CODEC_ID_ESCAPE124,
-AV_CODEC_ID_DIRAC,
-AV_CODEC_ID_BFI,
-AV_CODEC_ID_CMV,
-AV_CODEC_ID_MOTIONPIXELS,
-AV_CODEC_ID_TGV,
-AV_CODEC_ID_TGQ,
-AV_CODEC_ID_TQI,
-AV_CODEC_ID_AURA,
-AV_CODEC_ID_AURA2,
-AV_CODEC_ID_V210X,
-AV_CODEC_ID_TMV,
-AV_CODEC_ID_V210,
-AV_CODEC_ID_DPX,
-AV_CODEC_ID_MAD,
-AV_CODEC_ID_FRWU,
-AV_CODEC_ID_FLASHSV2,
-AV_CODEC_ID_CDGRAPHICS,
-AV_CODEC_ID_R210,
-AV_CODEC_ID_ANM,
-AV_CODEC_ID_BINKVIDEO,
-AV_CODEC_ID_IFF_ILBM,
-AV_CODEC_ID_IFF_BYTERUN1,
-AV_CODEC_ID_KGV1,
-AV_CODEC_ID_YOP,
-AV_CODEC_ID_VP8,
-AV_CODEC_ID_PICTOR,
-AV_CODEC_ID_ANSI,
-AV_CODEC_ID_A64_MULTI,
-AV_CODEC_ID_A64_MULTI5,
-AV_CODEC_ID_R10K,
-AV_CODEC_ID_MXPEG,
-AV_CODEC_ID_LAGARITH,
-AV_CODEC_ID_PRORES,
-AV_CODEC_ID_JV,
-AV_CODEC_ID_DFA,
-AV_CODEC_ID_WMV3IMAGE,
-AV_CODEC_ID_VC1IMAGE,
-AV_CODEC_ID_UTVIDEO,
-AV_CODEC_ID_BMV_VIDEO,
-AV_CODEC_ID_VBLE,
-AV_CODEC_ID_DXTORY,
-AV_CODEC_ID_V410,
-AV_CODEC_ID_XWD,
-AV_CODEC_ID_CDXL,
-AV_CODEC_ID_XBM,
-AV_CODEC_ID_ZEROCODEC,
-AV_CODEC_ID_MSS1,
-AV_CODEC_ID_MSA1,
-AV_CODEC_ID_TSCC2,
-AV_CODEC_ID_MTS2,
-AV_CODEC_ID_CLLC,
-AV_CODEC_ID_MSS2,
-/* various PCM "codecs" */
-AV_CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs
-AV_CODEC_ID_PCM_S16LE = 0x10000,
-AV_CODEC_ID_PCM_S16BE,
-AV_CODEC_ID_PCM_U16LE,
-AV_CODEC_ID_PCM_U16BE,
-AV_CODEC_ID_PCM_S8,
-AV_CODEC_ID_PCM_U8,
-AV_CODEC_ID_PCM_MULAW,
-AV_CODEC_ID_PCM_ALAW,
-AV_CODEC_ID_PCM_S32LE,
-AV_CODEC_ID_PCM_S32BE,
-AV_CODEC_ID_PCM_U32LE,
-AV_CODEC_ID_PCM_U32BE,
-AV_CODEC_ID_PCM_S24LE,
-AV_CODEC_ID_PCM_S24BE,
-AV_CODEC_ID_PCM_U24LE,
-AV_CODEC_ID_PCM_U24BE,
-AV_CODEC_ID_PCM_S24DAUD,
-AV_CODEC_ID_PCM_ZORK,
-AV_CODEC_ID_PCM_S16LE_PLANAR,
-AV_CODEC_ID_PCM_DVD,
-AV_CODEC_ID_PCM_F32BE,
-AV_CODEC_ID_PCM_F32LE,
-AV_CODEC_ID_PCM_F64BE,
-AV_CODEC_ID_PCM_F64LE,
-AV_CODEC_ID_PCM_BLURAY,
-AV_CODEC_ID_PCM_LXF,
-AV_CODEC_ID_S302M,
-AV_CODEC_ID_PCM_S8_PLANAR,
-/* various ADPCM codecs */
-AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
-AV_CODEC_ID_ADPCM_IMA_WAV,
-AV_CODEC_ID_ADPCM_IMA_DK3,
-AV_CODEC_ID_ADPCM_IMA_DK4,
-AV_CODEC_ID_ADPCM_IMA_WS,
-AV_CODEC_ID_ADPCM_IMA_SMJPEG,
-AV_CODEC_ID_ADPCM_MS,
-AV_CODEC_ID_ADPCM_4XM,
-AV_CODEC_ID_ADPCM_XA,
-AV_CODEC_ID_ADPCM_ADX,
-AV_CODEC_ID_ADPCM_EA,
-AV_CODEC_ID_ADPCM_G726,
-AV_CODEC_ID_ADPCM_CT,
-AV_CODEC_ID_ADPCM_SWF,
-AV_CODEC_ID_ADPCM_YAMAHA,
-AV_CODEC_ID_ADPCM_SBPRO_4,
-AV_CODEC_ID_ADPCM_SBPRO_3,
-AV_CODEC_ID_ADPCM_SBPRO_2,
-AV_CODEC_ID_ADPCM_THP,
-AV_CODEC_ID_ADPCM_IMA_AMV,
-AV_CODEC_ID_ADPCM_EA_R1,
-AV_CODEC_ID_ADPCM_EA_R3,
-AV_CODEC_ID_ADPCM_EA_R2,
-AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
-AV_CODEC_ID_ADPCM_IMA_EA_EACS,
-AV_CODEC_ID_ADPCM_EA_XAS,
-AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
-AV_CODEC_ID_ADPCM_IMA_ISS,
-AV_CODEC_ID_ADPCM_G722,
-AV_CODEC_ID_ADPCM_IMA_APC,
-/* AMR */
-AV_CODEC_ID_AMR_NB = 0x12000,
-AV_CODEC_ID_AMR_WB,
-/* RealAudio codecs*/
-AV_CODEC_ID_RA_144 = 0x13000,
-AV_CODEC_ID_RA_288,
-/* various DPCM codecs */
-AV_CODEC_ID_ROQ_DPCM = 0x14000,
-AV_CODEC_ID_INTERPLAY_DPCM,
-AV_CODEC_ID_XAN_DPCM,
-AV_CODEC_ID_SOL_DPCM,
-/* audio codecs */
-AV_CODEC_ID_MP2 = 0x15000,
-AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
-AV_CODEC_ID_AAC,
-AV_CODEC_ID_AC3,
-AV_CODEC_ID_DTS,
-AV_CODEC_ID_VORBIS,
-AV_CODEC_ID_DVAUDIO,
-AV_CODEC_ID_WMAV1,
-AV_CODEC_ID_WMAV2,
-AV_CODEC_ID_MACE3,
-AV_CODEC_ID_MACE6,
-AV_CODEC_ID_VMDAUDIO,
-AV_CODEC_ID_FLAC,
-AV_CODEC_ID_MP3ADU,
-AV_CODEC_ID_MP3ON4,
-AV_CODEC_ID_SHORTEN,
-AV_CODEC_ID_ALAC,
-AV_CODEC_ID_WESTWOOD_SND1,
-AV_CODEC_ID_GSM, ///< as in Berlin toast format
-AV_CODEC_ID_QDM2,
-AV_CODEC_ID_COOK,
-AV_CODEC_ID_TRUESPEECH,
-AV_CODEC_ID_TTA,
-AV_CODEC_ID_SMACKAUDIO,
-AV_CODEC_ID_QCELP,
-AV_CODEC_ID_WAVPACK,
-AV_CODEC_ID_DSICINAUDIO,
-AV_CODEC_ID_IMC,
-AV_CODEC_ID_MUSEPACK7,
-AV_CODEC_ID_MLP,
-AV_CODEC_ID_GSM_MS, /* as found in WAV */
-AV_CODEC_ID_ATRAC3,
-AV_CODEC_ID_VOXWARE,
-AV_CODEC_ID_APE,
-AV_CODEC_ID_NELLYMOSER,
-AV_CODEC_ID_MUSEPACK8,
-AV_CODEC_ID_SPEEX,
-AV_CODEC_ID_WMAVOICE,
-AV_CODEC_ID_WMAPRO,
-AV_CODEC_ID_WMALOSSLESS,
-AV_CODEC_ID_ATRAC3P,
-AV_CODEC_ID_EAC3,
-AV_CODEC_ID_SIPR,
-AV_CODEC_ID_MP1,
-AV_CODEC_ID_TWINVQ,
-AV_CODEC_ID_TRUEHD,
-AV_CODEC_ID_MP4ALS,
-AV_CODEC_ID_ATRAC1,
-AV_CODEC_ID_BINKAUDIO_RDFT,
-AV_CODEC_ID_BINKAUDIO_DCT,
-AV_CODEC_ID_AAC_LATM,
-AV_CODEC_ID_QDMC,
-AV_CODEC_ID_CELT,
-AV_CODEC_ID_G723_1,
-AV_CODEC_ID_G729,
-AV_CODEC_ID_8SVX_EXP,
-AV_CODEC_ID_8SVX_FIB,
-AV_CODEC_ID_BMV_AUDIO,
-AV_CODEC_ID_RALF,
-AV_CODEC_ID_IAC,
-AV_CODEC_ID_ILBC,
-AV_CODEC_ID_OPUS,
-/* subtitle codecs */
-AV_CODEC_ID_FIRST_SUBTITLE = 0x17000,          ///< A dummy ID pointing at the start of subtitle codecs.
-AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
-AV_CODEC_ID_DVB_SUBTITLE,
-AV_CODEC_ID_TEXT,  ///< raw UTF-8 text
-AV_CODEC_ID_XSUB,
-AV_CODEC_ID_SSA,
-AV_CODEC_ID_MOV_TEXT,
-AV_CODEC_ID_HDMV_PGS_SUBTITLE,
-AV_CODEC_ID_DVB_TELETEXT,
-AV_CODEC_ID_SRT,
-/* other specific kind of codecs (generally used for attachments) */
-AV_CODEC_ID_FIRST_UNKNOWN = 0x18000,           ///< A dummy ID pointing at the start of various fake codecs.
-AV_CODEC_ID_TTF = 0x18000,
-AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
-AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
-* stream (only used by libavformat) */
-AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
-* stream (only used by libavformat) */
-AV_CODEC_ID_FFMETADATA = 0x21000,   ///< Dummy codec for streams containing only metadata information.
-#if FF_API_CODEC_ID
-#include "old_codec_ids.h"
-#endif
-};
-#if FF_API_CODEC_ID
-#define CodecID AVCodecID
-#endif
-/**
-* This struct describes the properties of a single codec described by an
-* AVCodecID.
-* @see avcodec_get_descriptor()
-*/
-typedef struct AVCodecDescriptor {
-enum AVCodecID     id;
-enum AVMediaType type;
-/**
-* Name of the codec described by this descriptor. It is non-empty and
-* unique for each codec descriptor. It should contain alphanumeric
-* characters and '_' only.
-*/
-const char      *name;
-/**
-* A more descriptive name for this codec. May be NULL.
-*/
-const char *long_name;
-/**
-* Codec properties, a combination of AV_CODEC_PROP_* flags.
-*/
-int             props;
-} AVCodecDescriptor;
-/**
-* Codec uses only intra compression.
-* Video codecs only.
-*/
-#define AV_CODEC_PROP_INTRA_ONLY    (1 << 0)
-/**
-* Codec supports lossy compression. Audio and video codecs only.
-* @note a codec may support both lossy and lossless
-* compression modes
-*/
-#define AV_CODEC_PROP_LOSSY         (1 << 1)
-/**
-* Codec supports lossless compression. Audio and video codecs only.
-*/
-#define AV_CODEC_PROP_LOSSLESS      (1 << 2)
-#if FF_API_OLD_DECODE_AUDIO
-/* in bytes */
-#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
-#endif
-/**
-* @ingroup lavc_decoding
-* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
-* This is mainly needed because some optimized bitstream readers read
-* 32 or 64 bit at once and could read over the end.<br>
-* Note: If the first 23 bits of the additional bytes are not 0, then damaged
-* MPEG bitstreams could cause overread and segfault.
-*/
-#define FF_INPUT_BUFFER_PADDING_SIZE 8
-/**
-* @ingroup lavc_encoding
-* minimum encoding buffer size
-* Used to avoid some checks during header writing.
-*/
-#define FF_MIN_BUFFER_SIZE 16384
-/**
-* @ingroup lavc_encoding
-* motion estimation type.
-*/
-enum Motion_Est_ID {
-ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
-ME_FULL,
-ME_LOG,
-ME_PHODS,
-ME_EPZS,        ///< enhanced predictive zonal search
-ME_X1,          ///< reserved for experiments
-ME_HEX,         ///< hexagon based search
-ME_UMH,         ///< uneven multi-hexagon search
-ME_ITER,        ///< iterative search
-ME_TESA,        ///< transformed exhaustive search algorithm
-};
-/**
-* @ingroup lavc_decoding
-*/
-enum AVDiscard{
-/* We leave some space between them for extensions (drop some
-* keyframes for intra-only or drop just some bidir frames). */
-AVDISCARD_NONE    =-16, ///< discard nothing
-AVDISCARD_DEFAULT =  0, ///< discard useless packets like 0 size packets in avi
-AVDISCARD_NONREF  =  8, ///< discard all non reference
-AVDISCARD_BIDIR   = 16, ///< discard all bidirectional frames
-AVDISCARD_NONKEY  = 32, ///< discard all frames except keyframes
-AVDISCARD_ALL     = 48, ///< discard all
-};
-enum AVColorPrimaries{
-AVCOL_PRI_BT709       = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
-AVCOL_PRI_UNSPECIFIED = 2,
-AVCOL_PRI_BT470M      = 4,
-AVCOL_PRI_BT470BG     = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
-AVCOL_PRI_SMPTE170M   = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
-AVCOL_PRI_SMPTE240M   = 7, ///< functionally identical to above
-AVCOL_PRI_FILM        = 8,
-AVCOL_PRI_NB             , ///< Not part of ABI
-};
-enum AVColorTransferCharacteristic{
-AVCOL_TRC_BT709       = 1, ///< also ITU-R BT1361
-AVCOL_TRC_UNSPECIFIED = 2,
-AVCOL_TRC_GAMMA22     = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
-AVCOL_TRC_GAMMA28     = 5, ///< also ITU-R BT470BG
-AVCOL_TRC_SMPTE240M   = 7,
-AVCOL_TRC_NB             , ///< Not part of ABI
-};
-enum AVColorSpace{
-AVCOL_SPC_RGB         = 0,
-AVCOL_SPC_BT709       = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
-AVCOL_SPC_UNSPECIFIED = 2,
-AVCOL_SPC_FCC         = 4,
-AVCOL_SPC_BT470BG     = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
-AVCOL_SPC_SMPTE170M   = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
-AVCOL_SPC_SMPTE240M   = 7,
-AVCOL_SPC_YCOCG       = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
-AVCOL_SPC_NB             , ///< Not part of ABI
-};
-enum AVColorRange{
-AVCOL_RANGE_UNSPECIFIED = 0,
-AVCOL_RANGE_MPEG        = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
-AVCOL_RANGE_JPEG        = 2, ///< the normal     2^n-1   "JPEG" YUV ranges
-AVCOL_RANGE_NB             , ///< Not part of ABI
-};
-/**
-*  X   X      3 4 X      X are luma samples,
-*             1 2        1-6 are possible chroma positions
-*  X   X      5 6 X      0 is undefined/unknown position
-*/
-enum AVChromaLocation{
-AVCHROMA_LOC_UNSPECIFIED = 0,
-AVCHROMA_LOC_LEFT        = 1, ///< mpeg2/4, h264 default
-AVCHROMA_LOC_CENTER      = 2, ///< mpeg1, jpeg, h263
-AVCHROMA_LOC_TOPLEFT     = 3, ///< DV
-AVCHROMA_LOC_TOP         = 4,
-AVCHROMA_LOC_BOTTOMLEFT  = 5,
-AVCHROMA_LOC_BOTTOM      = 6,
-AVCHROMA_LOC_NB             , ///< Not part of ABI
-};
-enum AVAudioServiceType {
-AV_AUDIO_SERVICE_TYPE_MAIN              = 0,
-AV_AUDIO_SERVICE_TYPE_EFFECTS           = 1,
-AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
-AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED  = 3,
-AV_AUDIO_SERVICE_TYPE_DIALOGUE          = 4,
-AV_AUDIO_SERVICE_TYPE_COMMENTARY        = 5,
-AV_AUDIO_SERVICE_TYPE_EMERGENCY         = 6,
-AV_AUDIO_SERVICE_TYPE_VOICE_OVER        = 7,
-AV_AUDIO_SERVICE_TYPE_KARAOKE           = 8,
-AV_AUDIO_SERVICE_TYPE_NB                   , ///< Not part of ABI
-};
-/**
-* @ingroup lavc_encoding
-*/
-typedef struct RcOverride{
-int start_frame;
-int end_frame;
-int qscale; // If this is 0 then quality_factor will be used instead.
-float quality_factor;
-} RcOverride;
-#define FF_MAX_B_FRAMES 16
-/* encoding support
-These flags can be passed in AVCodecContext.flags before initialization.
-Note: Not everything is supported yet.
-*/
-#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
-#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
-#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
-#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
-#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
-/**
-* The parent program guarantees that the input for B-frames containing
-* streams is not written to for at least s->max_b_frames+1 frames, if
-* this is not set the input will be copied.
-*/
-#define CODEC_FLAG_INPUT_PRESERVED 0x0100
-#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
-#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
-#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
-#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
-#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
-#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
-location instead of only at frame boundaries. */
-#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
-#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
-#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
-#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
-#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
-/* Fx : Flag for h263+ extra options */
-#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
-#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
-#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
-#define CODEC_FLAG_CLOSED_GOP     0x80000000
-#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
-#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
-#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
-#if FF_API_MPV_GLOBAL_OPTS
-#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
-#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
-#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
-#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
-#endif
-#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
-/* Unsupported options :
-*              Syntax Arithmetic coding (SAC)
-*              Reference Picture Selection
-*              Independent Segment Decoding */
-/* /Fx */
-/* codec capabilities */
-#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
-/**
-* Codec uses get_buffer() for allocating buffers and supports custom allocators.
-* If not set, it might not use get_buffer() at all or use operations that
-* assume the buffer was allocated by avcodec_default_get_buffer.
-*/
-#define CODEC_CAP_DR1             0x0002
-#define CODEC_CAP_TRUNCATED       0x0008
-/* Codec can export data for HW decoding (XvMC). */
-#define CODEC_CAP_HWACCEL         0x0010
-/**
-* Encoder or decoder requires flushing with NULL input at the end in order to
-* give the complete and correct output.
-*
-* NOTE: If this flag is not set, the codec is guaranteed to never be fed with
-*       with NULL data. The user can still send NULL data to the public encode
-*       or decode function, but libavcodec will not pass it along to the codec
-*       unless this flag is set.
-*
-* Decoders:
-* The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
-* avpkt->size=0 at the end to get the delayed data until the decoder no longer
-* returns frames.
-*
-* Encoders:
-* The encoder needs to be fed with NULL data at the end of encoding until the
-* encoder no longer returns data.
-*
-* NOTE: For encoders implementing the AVCodec.encode2() function, setting this
-*       flag also means that the encoder must set the pts and duration for
-*       each output packet. If this flag is not set, the pts and duration will
-*       be determined by libavcodec from the input frame.
-*/
-#define CODEC_CAP_DELAY           0x0020
-/**
-* Codec can be fed a final frame with a smaller size.
-* This can be used to prevent truncation of the last audio samples.
-*/
-#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
-/**
-* Codec can export data for HW decoding (VDPAU).
-*/
-#define CODEC_CAP_HWACCEL_VDPAU    0x0080
-/**
-* Codec can output multiple frames per AVPacket
-* Normally demuxers return one frame at a time, demuxers which do not do
-* are connected to a parser to split what they return into proper frames.
-* This flag is reserved to the very rare category of codecs which have a
-* bitstream that cannot be split into frames without timeconsuming
-* operations like full decoding. Demuxers carring such bitstreams thus
-* may return multiple frames in a packet. This has many disadvantages like
-* prohibiting stream copy in many cases thus it should only be considered
-* as a last resort.
-*/
-#define CODEC_CAP_SUBFRAMES        0x0100
-/**
-* Codec is experimental and is thus avoided in favor of non experimental
-* encoders
-*/
-#define CODEC_CAP_EXPERIMENTAL     0x0200
-/**
-* Codec should fill in channel configuration and samplerate instead of container
-*/
-#define CODEC_CAP_CHANNEL_CONF     0x0400
-/**
-* Codec is able to deal with negative linesizes
-*/
-#define CODEC_CAP_NEG_LINESIZES    0x0800
-/**
-* Codec supports frame-level multithreading.
-*/
-#define CODEC_CAP_FRAME_THREADS    0x1000
-/**
-* Codec supports slice-based (or partition-based) multithreading.
-*/
-#define CODEC_CAP_SLICE_THREADS    0x2000
-/**
-* Codec supports changed parameters at any point.
-*/
-#define CODEC_CAP_PARAM_CHANGE     0x4000
-/**
-* Codec supports avctx->thread_count == 0 (auto).
-*/
-#define CODEC_CAP_AUTO_THREADS     0x8000
-/**
-* Audio encoder supports receiving a different number of samples in each call.
-*/
-#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
-//The following defines may change, don't expect compatibility if you use them.
-#define MB_TYPE_INTRA4x4   0x0001
-#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
-#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
-#define MB_TYPE_16x16      0x0008
-#define MB_TYPE_16x8       0x0010
-#define MB_TYPE_8x16       0x0020
-#define MB_TYPE_8x8        0x0040
-#define MB_TYPE_INTERLACED 0x0080
-#define MB_TYPE_DIRECT2    0x0100 //FIXME
-#define MB_TYPE_ACPRED     0x0200
-#define MB_TYPE_GMC        0x0400
-#define MB_TYPE_SKIP       0x0800
-#define MB_TYPE_P0L0       0x1000
-#define MB_TYPE_P1L0       0x2000
-#define MB_TYPE_P0L1       0x4000
-#define MB_TYPE_P1L1       0x8000
-#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
-#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
-#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
-#define MB_TYPE_QUANT      0x00010000
-#define MB_TYPE_CBP        0x00020000
-//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
-/**
-* Pan Scan area.
-* This specifies the area which should be displayed.
-* Note there may be multiple such areas for one frame.
-*/
-typedef struct AVPanScan{
-/**
-* id
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int id;
-/**
-* width and height in 1/16 pel
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int width;
-int height;
-/**
-* position of the top left corner in 1/16 pel for up to 3 fields/frames
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int16_t position[3][2];
-}AVPanScan;
-#define FF_QSCALE_TYPE_MPEG1 0
-#define FF_QSCALE_TYPE_MPEG2 1
-#define FF_QSCALE_TYPE_H264  2
-#define FF_QSCALE_TYPE_VP56  3
-#define FF_BUFFER_TYPE_INTERNAL 1
-#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
-#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
-#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
-#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
-#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
-#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
-#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
-/**
-* @defgroup lavc_packet AVPacket
-*
-* Types and functions for working with AVPacket.
-* @{
-*/
-enum AVPacketSideDataType {
-AV_PKT_DATA_PALETTE,
-AV_PKT_DATA_NEW_EXTRADATA,
-/**
-* An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
-* @code
-* u32le param_flags
-* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
-*     s32le channel_count
-* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
-*     u64le channel_layout
-* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
-*     s32le sample_rate
-* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
-*     s32le width
-*     s32le height
-* @endcode
-*/
-AV_PKT_DATA_PARAM_CHANGE,
-/**
-* An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
-* structures with info about macroblocks relevant to splitting the
-* packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
-* That is, it does not necessarily contain info about all macroblocks,
-* as long as the distance between macroblocks in the info is smaller
-* than the target payload size.
-* Each MB info structure is 12 bytes, and is laid out as follows:
-* @code
-* u32le bit offset from the start of the packet
-* u8    current quantizer at the start of the macroblock
-* u8    GOB number
-* u16le macroblock address within the GOB
-* u8    horizontal MV predictor
-* u8    vertical MV predictor
-* u8    horizontal MV predictor for block number 3
-* u8    vertical MV predictor for block number 3
-* @endcode
-*/
-AV_PKT_DATA_H263_MB_INFO,
-};
-typedef struct AVPacket {
-/**
-* Presentation timestamp in AVStream->time_base units; the time at which
-* the decompressed packet will be presented to the user.
-* Can be AV_NOPTS_VALUE if it is not stored in the file.
-* pts MUST be larger or equal to dts as presentation cannot happen before
-* decompression, unless one wants to view hex dumps. Some formats misuse
-* the terms dts and pts/cts to mean something different. Such timestamps
-* must be converted to true pts/dts before they are stored in AVPacket.
-*/
-int64_t pts;
-/**
-* Decompression timestamp in AVStream->time_base units; the time at which
-* the packet is decompressed.
-* Can be AV_NOPTS_VALUE if it is not stored in the file.
-*/
-int64_t dts;
-uint8_t *data;
-int   size;
-int   stream_index;
-/**
-* A combination of AV_PKT_FLAG values
-*/
-int   flags;
-/**
-* Additional packet data that can be provided by the container.
-* Packet can contain several types of side information.
-*/
-struct {
-uint8_t *data;
-int      size;
-enum AVPacketSideDataType type;
-} *side_data;
-int side_data_elems;
-/**
-* Duration of this packet in AVStream->time_base units, 0 if unknown.
-* Equals next_pts - this_pts in presentation order.
-*/
-int   duration;
-void  (*destruct)(struct AVPacket *);
-void  *priv;
-int64_t pos;                            ///< byte position in stream, -1 if unknown
-/**
-* Time difference in AVStream->time_base units from the pts of this
-* packet to the point at which the output from the decoder has converged
-* independent from the availability of previous frames. That is, the
-* frames are virtually identical no matter if decoding started from
-* the very first frame or from this keyframe.
-* Is AV_NOPTS_VALUE if unknown.
-* This field is not the display duration of the current packet.
-* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
-* set.
-*
-* The purpose of this field is to allow seeking in streams that have no
-* keyframes in the conventional sense. It corresponds to the
-* recovery point SEI in H.264 and match_time_delta in NUT. It is also
-* essential for some types of subtitle streams to ensure that all
-* subtitles are correctly displayed after seeking.
-*/
-int64_t convergence_duration;
-} AVPacket;
-#define AV_PKT_FLAG_KEY     0x0001 ///< The packet contains a keyframe
-#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
-enum AVSideDataParamChangeFlags {
-AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT  = 0x0001,
-AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
-AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE    = 0x0004,
-AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS     = 0x0008,
-};
-/**
-* @}
-*/
-/**
-* Audio Video Frame.
-* New fields can be added to the end of AVFRAME with minor version
-* bumps. Removal, reordering and changes to existing fields require
-* a major version bump.
-* sizeof(AVFrame) must not be used outside libav*.
-*/
-typedef struct AVFrame {
-#define AV_NUM_DATA_POINTERS 8
-/**
-* pointer to the picture/channel planes.
-* This might be different from the first allocated byte
-* - encoding: Set by user
-* - decoding: set by AVCodecContext.get_buffer()
-*/
-uint8_t *data[AV_NUM_DATA_POINTERS];
-/**
-* Size, in bytes, of the data for each picture/channel plane.
-*
-* For audio, only linesize[0] may be set. For planar audio, each channel
-* plane must be the same size.
-*
-* - encoding: Set by user
-* - decoding: set by AVCodecContext.get_buffer()
-*/
-int linesize[AV_NUM_DATA_POINTERS];
-/**
-* pointers to the data planes/channels.
-*
-* For video, this should simply point to data[].
-*
-* For planar audio, each channel has a separate data pointer, and
-* linesize[0] contains the size of each channel buffer.
-* For packed audio, there is just one data pointer, and linesize[0]
-* contains the total size of the buffer for all channels.
-*
-* Note: Both data and extended_data will always be set by get_buffer(),
-* but for planar audio with more channels that can fit in data,
-* extended_data must be used by the decoder in order to access all
-* channels.
-*
-* encoding: set by user
-* decoding: set by AVCodecContext.get_buffer()
-*/
-uint8_t **extended_data;
-/**
-* width and height of the video frame
-* - encoding: unused
-* - decoding: Read by user.
-*/
-int width, height;
-/**
-* number of audio samples (per channel) described by this frame
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-int nb_samples;
-/**
-* format of the frame, -1 if unknown or unset
-* Values correspond to enum AVPixelFormat for video frames,
-* enum AVSampleFormat for audio)
-* - encoding: unused
-* - decoding: Read by user.
-*/
-int format;
-/**
-* 1 -> keyframe, 0-> not
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-int key_frame;
-/**
-* Picture type of the frame, see ?_TYPE below.
-* - encoding: Set by libavcodec. for coded_picture (and set by user for input).
-* - decoding: Set by libavcodec.
-*/
-enum AVPictureType pict_type;
-/**
-* pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.
-* This isn't used by libavcodec unless the default get/release_buffer() is used.
-* - encoding:
-* - decoding:
-*/
-uint8_t *base[AV_NUM_DATA_POINTERS];
-/**
-* sample aspect ratio for the video frame, 0/1 if unknown/unspecified
-* - encoding: unused
-* - decoding: Read by user.
-*/
-AVRational sample_aspect_ratio;
-/**
-* presentation timestamp in time_base units (time when frame should be shown to user)
-* If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.
-* - encoding: MUST be set by user.
-* - decoding: Set by libavcodec.
-*/
-int64_t pts;
-/**
-* reordered pts from the last AVPacket that has been input into the decoder
-* - encoding: unused
-* - decoding: Read by user.
-*/
-int64_t pkt_pts;
-/**
-* dts from the last AVPacket that has been input into the decoder
-* - encoding: unused
-* - decoding: Read by user.
-*/
-int64_t pkt_dts;
-/**
-* picture number in bitstream order
-* - encoding: set by
-* - decoding: Set by libavcodec.
-*/
-int coded_picture_number;
-/**
-* picture number in display order
-* - encoding: set by
-* - decoding: Set by libavcodec.
-*/
-int display_picture_number;
-/**
-* quality (between 1 (good) and FF_LAMBDA_MAX (bad))
-* - encoding: Set by libavcodec. for coded_picture (and set by user for input).
-* - decoding: Set by libavcodec.
-*/
-int quality;
-/**
-* is this picture used as reference
-* The values for this are the same as the MpegEncContext.picture_structure
-* variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
-* Set to 4 for delayed, non-reference frames.
-* - encoding: unused
-* - decoding: Set by libavcodec. (before get_buffer() call)).
-*/
-int reference;
-/**
-* QP table
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-int8_t *qscale_table;
-/**
-* QP store stride
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-int qstride;
-/**
-*
-*/
-int qscale_type;
-/**
-* mbskip_table[mb]>=1 if MB didn't change
-* stride= mb_width = (width+15)>>4
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-uint8_t *mbskip_table;
-/**
-* motion vector table
-* @code
-* example:
-* int mv_sample_log2= 4 - motion_subsample_log2;
-* int mb_width= (width+15)>>4;
-* int mv_stride= (mb_width << mv_sample_log2) + 1;
-* motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
-* @endcode
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int16_t (*motion_val[2])[2];
-/**
-* macroblock type table
-* mb_type_base + mb_width + 2
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-uint32_t *mb_type;
-/**
-* DCT coefficients
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-short *dct_coeff;
-/**
-* motion reference frame index
-* the order in which these are stored can depend on the codec.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int8_t *ref_index[2];
-/**
-* for some private data of the user
-* - encoding: unused
-* - decoding: Set by user.
-*/
-void *opaque;
-/**
-* error
-* - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.
-* - decoding: unused
-*/
-uint64_t error[AV_NUM_DATA_POINTERS];
-/**
-* type of the buffer (to keep track of who has to deallocate data[*])
-* - encoding: Set by the one who allocates it.
-* - decoding: Set by the one who allocates it.
-* Note: User allocated (direct rendering) & internal buffers cannot coexist currently.
-*/
-int type;
-/**
-* When decoding, this signals how much the picture must be delayed.
-* extra_delay = repeat_pict / (2*fps)
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-int repeat_pict;
-/**
-* The content of the picture is interlaced.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec. (default 0)
-*/
-int interlaced_frame;
-/**
-* If the content is interlaced, is top field displayed first.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int top_field_first;
-/**
-* Tell user application that palette has changed from previous frame.
-* - encoding: ??? (no palette-enabled encoder yet)
-* - decoding: Set by libavcodec. (default 0).
-*/
-int palette_has_changed;
-/**
-* codec suggestion on buffer type if != 0
-* - encoding: unused
-* - decoding: Set by libavcodec. (before get_buffer() call)).
-*/
-int buffer_hints;
-/**
-* Pan scan.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-AVPanScan *pan_scan;
-/**
-* reordered opaque 64bit (generally an integer or a double precision float
-* PTS but can be anything).
-* The user sets AVCodecContext.reordered_opaque to represent the input at
-* that time,
-* the decoder reorders values as needed and sets AVFrame.reordered_opaque
-* to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
-* @deprecated in favor of pkt_pts
-* - encoding: unused
-* - decoding: Read by user.
-*/
-int64_t reordered_opaque;
-/**
-* hardware accelerator private data (Libav-allocated)
-* - encoding: unused
-* - decoding: Set by libavcodec
-*/
-void *hwaccel_picture_private;
-/**
-* the AVCodecContext which ff_thread_get_buffer() was last called on
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-struct AVCodecContext *owner;
-/**
-* used by multithreading to store frame-specific info
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-void *thread_opaque;
-/**
-* log2 of the size of the block which a single vector in motion_val represents:
-* (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
-* - encoding: unused
-* - decoding: Set by libavcodec.
-*/
-uint8_t motion_subsample_log2;
-/**
-* Sample rate of the audio data.
-*
-* - encoding: unused
-* - decoding: set by get_buffer()
-*/
-int sample_rate;
-/**
-* Channel layout of the audio data.
-*
-* - encoding: unused
-* - decoding: set by get_buffer()
-*/
-uint64_t channel_layout;
-} AVFrame;
-struct AVCodecInternal;
-enum AVFieldOrder {
-AV_FIELD_UNKNOWN,
-AV_FIELD_PROGRESSIVE,
-AV_FIELD_TT,          //< Top coded_first, top displayed first
-AV_FIELD_BB,          //< Bottom coded first, bottom displayed first
-AV_FIELD_TB,          //< Top coded first, bottom displayed first
-AV_FIELD_BT,          //< Bottom coded first, top displayed first
-};
-/**
-* main external API structure.
-* New fields can be added to the end with minor version bumps.
-* Removal, reordering and changes to existing fields require a major
-* version bump.
-* sizeof(AVCodecContext) must not be used outside libav*.
-*/
-typedef struct AVCodecContext {
-/**
-* information on struct for av_log
-* - set by avcodec_alloc_context3
-*/
-const AVClass *av_class;
-int log_level_offset;
-enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
-const struct AVCodec  *codec;
-char             codec_name[32];
-enum AVCodecID     codec_id; /* see AV_CODEC_ID_xxx */
-/**
-* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-* This is used to work around some encoder bugs.
-* A demuxer should set this to what is stored in the field used to identify the codec.
-* If there are multiple such fields in a container then the demuxer should choose the one
-* which maximizes the information about the used codec.
-* If the codec tag field in a container is larger than 32 bits then the demuxer should
-* remap the longer ID to 32 bits with a table or other structure. Alternatively a new
-* extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
-* first.
-* - encoding: Set by user, if not then the default based on codec_id will be used.
-* - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-*/
-unsigned int codec_tag;
-/**
-* fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
-* This is used to work around some encoder bugs.
-* - encoding: unused
-* - decoding: Set by user, will be converted to uppercase by libavcodec during init.
-*/
-unsigned int stream_codec_tag;
-#if FF_API_SUB_ID
-/**
-* @deprecated this field is unused
-*/
-attribute_deprecated int sub_id;
-#endif
-void *priv_data;
-/**
-* Private context used for internal data.
-*
-* Unlike priv_data, this is not codec-specific. It is used in general
-* libavcodec functions.
-*/
-struct AVCodecInternal *internal;
-/**
-* Private data of the user, can be used to carry app specific stuff.
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-void *opaque;
-/**
-* the average bitrate
-* - encoding: Set by user; unused for constant quantizer encoding.
-* - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
-*/
-int bit_rate;
-/**
-* number of bits the bitstream is allowed to diverge from the reference.
-*           the reference can be CBR (for CBR pass1) or VBR (for pass2)
-* - encoding: Set by user; unused for constant quantizer encoding.
-* - decoding: unused
-*/
-int bit_rate_tolerance;
-/**
-* Global quality for codecs which cannot change it per frame.
-* This should be proportional to MPEG-1/2/4 qscale.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int global_quality;
-/**
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int compression_level;
-#define FF_COMPRESSION_DEFAULT -1
-/**
-* CODEC_FLAG_*.
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int flags;
-/**
-* CODEC_FLAG2_*
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int flags2;
-/**
-* some codecs need / can use extradata like Huffman tables.
-* mjpeg: Huffman tables
-* rv10: additional flags
-* mpeg4: global headers (they can be in the bitstream or here)
-* The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
-* than extradata_size to avoid prolems if it is read with the bitstream reader.
-* The bytewise contents of extradata must not depend on the architecture or CPU endianness.
-* - encoding: Set/allocated/freed by libavcodec.
-* - decoding: Set/allocated/freed by user.
-*/
-uint8_t *extradata;
-int extradata_size;
-/**
-* 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.
-* - encoding: MUST be set by user.
-* - decoding: Set by libavcodec.
-*/
-AVRational time_base;
-/**
-* For some codecs, the time base is closer to the field rate than the frame rate.
-* Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
-* if no telecine is used ...
-*
-* Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
-*/
-int ticks_per_frame;
-/**
-* Encoder delay.
-*
-* Video:
-*   Number of frames the decoded output will be delayed relative to the
-*   encoded input.
-*
-* Audio:
-*   For encoding, this is the number of "priming" samples added to the
-*   beginning of the stream. The decoded output will be delayed by this
-*   many samples relative to the input to the encoder. Note that this
-*   field is purely informational and does not directly affect the pts
-*   output by the encoder, which should always be based on the actual
-*   presentation time, including any delay.
-*   For decoding, this is the number of samples the decoder needs to
-*   output before the decoder's output is valid. When seeking, you should
-*   start decoding this many samples prior to your desired seek point.
-*
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-int delay;
-/* video only */
-/**
-* picture width / height.
-* - encoding: MUST be set by user.
-* - decoding: Set by libavcodec.
-* Note: For compatibility it is possible to set this instead of
-* coded_width/height before decoding.
-*/
-int width, height;
-/**
-* Bitstream width / height, may be different from width/height.
-* - encoding: unused
-* - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
-*/
-int coded_width, coded_height;
-#define FF_ASPECT_EXTENDED 15
-/**
-* the number of pictures in a group of pictures, or 0 for intra_only
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int gop_size;
-/**
-* Pixel format, see AV_PIX_FMT_xxx.
-* May be set by the demuxer if known from headers.
-* May be overriden by the decoder if it knows better.
-* - encoding: Set by user.
-* - decoding: Set by user if known, overridden by libavcodec if known
-*/
-enum AVPixelFormat pix_fmt;
-/**
-* Motion estimation algorithm used for video coding.
-* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
-* 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
-* - encoding: MUST be set by user.
-* - decoding: unused
-*/
-int me_method;
-/**
-* If non NULL, 'draw_horiz_band' is called by the libavcodec
-* decoder to draw a horizontal band. It improves cache usage. Not
-* all codecs can do that. You must check the codec capabilities
-* beforehand.
-* When multithreading is used, it may be called from multiple threads
-* at the same time; threads might draw different parts of the same AVFrame,
-* or multiple AVFrames, and there is no guarantee that slices will be drawn
-* in order.
-* The function is also used by hardware acceleration APIs.
-* It is called at least once during frame decoding to pass
-* the data needed for hardware render.
-* In that mode instead of pixel data, AVFrame points to
-* a structure specific to the acceleration API. The application
-* reads the structure and can change some fields to indicate progress
-* or mark state.
-* - encoding: unused
-* - decoding: Set by user.
-* @param height the height of the slice
-* @param y the y position of the slice
-* @param type 1->top field, 2->bottom field, 3->frame
-* @param offset offset into the AVFrame.data from which the slice should be read
-*/
-void (*draw_horiz_band)(struct AVCodecContext *s,
-const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
-int y, int type, int height);
-/**
-* callback to negotiate the pixelFormat
-* @param fmt is the list of formats which are supported by the codec,
-* it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
-* The first is always the native one.
-* @return the chosen format
-* - encoding: unused
-* - decoding: Set by user, if not set the native format will be chosen.
-*/
-enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
-/**
-* maximum number of B-frames between non-B-frames
-* Note: The output will be delayed by max_b_frames+1 relative to the input.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int max_b_frames;
-/**
-* qscale factor between IP and B-frames
-* If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
-* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float b_quant_factor;
-/** obsolete FIXME remove */
-int rc_strategy;
-#define FF_RC_STRATEGY_XVID 1
-int b_frame_strategy;
-#if FF_API_MPV_GLOBAL_OPTS
-/**
-* luma single coefficient elimination threshold
-* - encoding: Set by user.
-* - decoding: unused
-*/
-attribute_deprecated int luma_elim_threshold;
-/**
-* chroma single coeff elimination threshold
-* - encoding: Set by user.
-* - decoding: unused
-*/
-attribute_deprecated int chroma_elim_threshold;
-#endif
-/**
-* qscale offset between IP and B-frames
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float b_quant_offset;
-/**
-* Size of the frame reordering buffer in the decoder.
-* For MPEG-2 it is 1 IPB or 0 low delay IP.
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-int has_b_frames;
-/**
-* 0-> h263 quant 1-> mpeg quant
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mpeg_quant;
-/**
-* qscale factor between P and I-frames
-* If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
-* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float i_quant_factor;
-/**
-* qscale offset between P and I-frames
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float i_quant_offset;
-/**
-* luminance masking (0-> disabled)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float lumi_masking;
-/**
-* temporary complexity masking (0-> disabled)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float temporal_cplx_masking;
-/**
-* spatial complexity masking (0-> disabled)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float spatial_cplx_masking;
-/**
-* p block masking (0-> disabled)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float p_masking;
-/**
-* darkness masking (0-> disabled)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float dark_masking;
-/**
-* slice count
-* - encoding: Set by libavcodec.
-* - decoding: Set by user (or 0).
-*/
-int slice_count;
-/**
-* prediction method (needed for huffyuv)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int prediction_method;
-#define FF_PRED_LEFT   0
-#define FF_PRED_PLANE  1
-#define FF_PRED_MEDIAN 2
-/**
-* slice offsets in the frame in bytes
-* - encoding: Set/allocated by libavcodec.
-* - decoding: Set/allocated by user (or NULL).
-*/
-int *slice_offset;
-/**
-* sample aspect ratio (0 if unknown)
-* That is the width of a pixel divided by the height of the pixel.
-* Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-AVRational sample_aspect_ratio;
-/**
-* motion estimation comparison function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_cmp;
-/**
-* subpixel motion estimation comparison function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_sub_cmp;
-/**
-* macroblock comparison function (not supported yet)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mb_cmp;
-/**
-* interlaced DCT comparison function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int ildct_cmp;
-#define FF_CMP_SAD    0
-#define FF_CMP_SSE    1
-#define FF_CMP_SATD   2
-#define FF_CMP_DCT    3
-#define FF_CMP_PSNR   4
-#define FF_CMP_BIT    5
-#define FF_CMP_RD     6
-#define FF_CMP_ZERO   7
-#define FF_CMP_VSAD   8
-#define FF_CMP_VSSE   9
-#define FF_CMP_NSSE   10
-#define FF_CMP_W53    11
-#define FF_CMP_W97    12
-#define FF_CMP_DCTMAX 13
-#define FF_CMP_DCT264 14
-#define FF_CMP_CHROMA 256
-/**
-* ME diamond size & shape
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int dia_size;
-/**
-* amount of previous MV predictors (2a+1 x 2a+1 square)
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int last_predictor_count;
-/**
-* prepass for motion estimation
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int pre_me;
-/**
-* motion estimation prepass comparison function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_pre_cmp;
-/**
-* ME prepass diamond size & shape
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int pre_dia_size;
-/**
-* subpel ME quality
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_subpel_quality;
-/**
-* DTG active format information (additional aspect ratio
-* information only used in DVB MPEG-2 transport streams)
-* 0 if not set.
-*
-* - encoding: unused
-* - decoding: Set by decoder.
-*/
-int dtg_active_format;
-#define FF_DTG_AFD_SAME         8
-#define FF_DTG_AFD_4_3          9
-#define FF_DTG_AFD_16_9         10
-#define FF_DTG_AFD_14_9         11
-#define FF_DTG_AFD_4_3_SP_14_9  13
-#define FF_DTG_AFD_16_9_SP_14_9 14
-#define FF_DTG_AFD_SP_4_3       15
-/**
-* maximum motion estimation search range in subpel units
-* If 0 then no limit.
-*
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_range;
-/**
-* intra quantizer bias
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int intra_quant_bias;
-#define FF_DEFAULT_QUANT_BIAS 999999
-/**
-* inter quantizer bias
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int inter_quant_bias;
-#if FF_API_COLOR_TABLE_ID
-/**
-* color table ID
-* - encoding: unused
-* - decoding: Which clrtable should be used for 8bit RGB images.
-*             Tables have to be stored somewhere. FIXME
-*/
-attribute_deprecated int color_table_id;
-#endif
-/**
-* slice flags
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int slice_flags;
-#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
-#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
-#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
-/**
-* XVideo Motion Acceleration
-* - encoding: forbidden
-* - decoding: set by decoder
-*/
-int xvmc_acceleration;
-/**
-* macroblock decision mode
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mb_decision;
-#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
-#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
-#define FF_MB_DECISION_RD     2        ///< rate distortion
-/**
-* custom intra quantization matrix
-* - encoding: Set by user, can be NULL.
-* - decoding: Set by libavcodec.
-*/
-uint16_t *intra_matrix;
-/**
-* custom inter quantization matrix
-* - encoding: Set by user, can be NULL.
-* - decoding: Set by libavcodec.
-*/
-uint16_t *inter_matrix;
-/**
-* scene change detection threshold
-* 0 is default, larger means fewer detected scene changes.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int scenechange_threshold;
-/**
-* noise reduction strength
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int noise_reduction;
-#if FF_API_INTER_THRESHOLD
-/**
-* @deprecated this field is unused
-*/
-attribute_deprecated int inter_threshold;
-#endif
-#if FF_API_MPV_GLOBAL_OPTS
-/**
-* @deprecated use mpegvideo private options instead
-*/
-attribute_deprecated int quantizer_noise_shaping;
-#endif
-/**
-* Motion estimation threshold below which no motion estimation is
-* performed, but instead the user specified motion vectors are used.
-*
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_threshold;
-/**
-* Macroblock threshold below which the user specified macroblock types will be used.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mb_threshold;
-/**
-* precision of the intra DC coefficient - 8
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int intra_dc_precision;
-/**
-* Number of macroblock rows at the top which are skipped.
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int skip_top;
-/**
-* Number of macroblock rows at the bottom which are skipped.
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int skip_bottom;
-/**
-* Border processing masking, raises the quantizer for mbs on the borders
-* of the picture.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float border_masking;
-/**
-* minimum MB lagrange multipler
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mb_lmin;
-/**
-* maximum MB lagrange multipler
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mb_lmax;
-/**
-*
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int me_penalty_compensation;
-/**
-*
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int bidir_refine;
-/**
-*
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int brd_scale;
-/**
-* minimum GOP size
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int keyint_min;
-/**
-* number of reference frames
-* - encoding: Set by user.
-* - decoding: Set by lavc.
-*/
-int refs;
-/**
-* chroma qp offset from luma
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int chromaoffset;
-/**
-* Multiplied by qscale for each frame and added to scene_change_score.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int scenechange_factor;
-/**
-*
-* Note: Value depends upon the compare function used for fullpel ME.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int mv0_threshold;
-/**
-* Adjust sensitivity of b_frame_strategy 1.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int b_sensitivity;
-/**
-* Chromaticity coordinates of the source primaries.
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-enum AVColorPrimaries color_primaries;
-/**
-* Color Transfer Characteristic.
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-enum AVColorTransferCharacteristic color_trc;
-/**
-* YUV colorspace type.
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-enum AVColorSpace colorspace;
-/**
-* MPEG vs JPEG YUV range.
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-enum AVColorRange color_range;
-/**
-* This defines the location of chroma samples.
-* - encoding: Set by user
-* - decoding: Set by libavcodec
-*/
-enum AVChromaLocation chroma_sample_location;
-/**
-* Number of slices.
-* Indicates number of picture subdivisions. Used for parallelized
-* decoding.
-* - encoding: Set by user
-* - decoding: unused
-*/
-int slices;
-/** Field order
-* - encoding: set by libavcodec
-* - decoding: Set by libavcodec
-*/
-enum AVFieldOrder field_order;
-/* audio only */
-int sample_rate; ///< samples per second
-int channels;    ///< number of audio channels
-/**
-* audio sample format
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-enum AVSampleFormat sample_fmt;  ///< sample format
-/* The following data should not be initialized. */
-/**
-* Samples per packet, initialized when calling 'init'.
-*/
-int frame_size;
-/**
-* Frame counter, set by libavcodec.
-*
-* - decoding: total number of frames returned from the decoder so far.
-* - encoding: total number of frames passed to the encoder so far.
-*
-*   @note the counter is not incremented if encoding/decoding resulted in
-*   an error.
-*/
-int frame_number;
-/**
-* number of bytes per packet if constant and known or 0
-* Used by some WAV based audio codecs.
-*/
-int block_align;
-/**
-* Audio cutoff bandwidth (0 means "automatic")
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int cutoff;
-#if FF_API_REQUEST_CHANNELS
-/**
-* Decoder should decode to this many channels if it can (0 for default)
-* - encoding: unused
-* - decoding: Set by user.
-* @deprecated Deprecated in favor of request_channel_layout.
-*/
-int request_channels;
-#endif
-/**
-* Audio channel layout.
-* - encoding: set by user.
-* - decoding: set by libavcodec.
-*/
-uint64_t channel_layout;
-/**
-* Request decoder to use this channel layout if it can (0 for default)
-* - encoding: unused
-* - decoding: Set by user.
-*/
-uint64_t request_channel_layout;
-/**
-* Type of service that the audio stream conveys.
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-enum AVAudioServiceType audio_service_type;
-/**
-* Used to request a sample format from the decoder.
-* - encoding: unused.
-* - decoding: Set by user.
-*/
-enum AVSampleFormat request_sample_fmt;
-/**
-* Called at the beginning of each frame to get a buffer for it.
-*
-* The function will set AVFrame.data[], AVFrame.linesize[].
-* AVFrame.extended_data[] must also be set, but it should be the same as
-* AVFrame.data[] except for planar audio with more channels than can fit
-* in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
-* many data pointers as it can hold.
-*
-* if CODEC_CAP_DR1 is not set then get_buffer() must call
-* avcodec_default_get_buffer() instead of providing buffers allocated by
-* some other means.
-*
-* AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
-* need it. avcodec_default_get_buffer() aligns the output buffer properly,
-* but if get_buffer() is overridden then alignment considerations should
-* be taken into account.
-*
-* @see avcodec_default_get_buffer()
-*
-* Video:
-*
-* If pic.reference is set then the frame will be read later by libavcodec.
-* avcodec_align_dimensions2() should be used to find the required width and
-* height, as they normally need to be rounded up to the next multiple of 16.
-*
-* If frame multithreading is used and thread_safe_callbacks is set,
-* it may be called from a different thread, but not from more than one at
-* once. Does not need to be reentrant.
-*
-* @see release_buffer(), reget_buffer()
-* @see avcodec_align_dimensions2()
-*
-* Audio:
-*
-* Decoders request a buffer of a particular size by setting
-* AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
-* however, utilize only part of the buffer by setting AVFrame.nb_samples
-* to a smaller value in the output frame.
-*
-* Decoders cannot use the buffer after returning from
-* avcodec_decode_audio4(), so they will not call release_buffer(), as it
-* is assumed to be released immediately upon return.
-*
-* As a convenience, av_samples_get_buffer_size() and
-* av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
-* functions to find the required data size and to fill data pointers and
-* linesize. In AVFrame.linesize, only linesize[0] may be set for audio
-* since all planes must be the same size.
-*
-* @see av_samples_get_buffer_size(), av_samples_fill_arrays()
-*
-* - encoding: unused
-* - decoding: Set by libavcodec, user can override.
-*/
-int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
-/**
-* Called to release buffers which were allocated with get_buffer.
-* A released buffer can be reused in get_buffer().
-* pic.data[*] must be set to NULL.
-* May be called from a different thread if frame multithreading is used,
-* but not by more than one thread at once, so does not need to be reentrant.
-* - encoding: unused
-* - decoding: Set by libavcodec, user can override.
-*/
-void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
-/**
-* Called at the beginning of a frame to get cr buffer for it.
-* Buffer type (size, hints) must be the same. libavcodec won't check it.
-* libavcodec will pass previous buffer in pic, function should return
-* same buffer or new buffer with old frame "painted" into it.
-* If pic.data[0] == NULL must behave like get_buffer().
-* if CODEC_CAP_DR1 is not set then reget_buffer() must call
-* avcodec_default_reget_buffer() instead of providing buffers allocated by
-* some other means.
-* - encoding: unused
-* - decoding: Set by libavcodec, user can override.
-*/
-int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
-/* - encoding parameters */
-float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
-float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
-/**
-* minimum quantizer
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int qmin;
-/**
-* maximum quantizer
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int qmax;
-/**
-* maximum quantizer difference between frames
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int max_qdiff;
-/**
-* ratecontrol qmin qmax limiting method
-* 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float rc_qsquish;
-float rc_qmod_amp;
-int rc_qmod_freq;
-/**
-* decoder bitstream buffer size
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int rc_buffer_size;
-/**
-* ratecontrol override, see RcOverride
-* - encoding: Allocated/set/freed by user.
-* - decoding: unused
-*/
-int rc_override_count;
-RcOverride *rc_override;
-/**
-* rate control equation
-* - encoding: Set by user
-* - decoding: unused
-*/
-const char *rc_eq;
-/**
-* maximum bitrate
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int rc_max_rate;
-/**
-* minimum bitrate
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int rc_min_rate;
-float rc_buffer_aggressivity;
-/**
-* initial complexity for pass1 ratecontrol
-* - encoding: Set by user.
-* - decoding: unused
-*/
-float rc_initial_cplx;
-/**
-* Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
-* - encoding: Set by user.
-* - decoding: unused.
-*/
-float rc_max_available_vbv_use;
-/**
-* Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
-* - encoding: Set by user.
-* - decoding: unused.
-*/
-float rc_min_vbv_overflow_use;
-/**
-* Number of bits which should be loaded into the rc buffer before decoding starts.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int rc_initial_buffer_occupancy;
-#define FF_CODER_TYPE_VLC       0
-#define FF_CODER_TYPE_AC        1
-#define FF_CODER_TYPE_RAW       2
-#define FF_CODER_TYPE_RLE       3
-#define FF_CODER_TYPE_DEFLATE   4
-/**
-* coder type
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int coder_type;
-/**
-* context model
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int context_model;
-/**
-* minimum Lagrange multipler
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int lmin;
-/**
-* maximum Lagrange multipler
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int lmax;
-/**
-* frame skip threshold
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int frame_skip_threshold;
-/**
-* frame skip factor
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int frame_skip_factor;
-/**
-* frame skip exponent
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int frame_skip_exp;
-/**
-* frame skip comparison function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int frame_skip_cmp;
-/**
-* trellis RD quantization
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int trellis;
-/**
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int min_prediction_order;
-/**
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int max_prediction_order;
-/**
-* GOP timecode frame start number, in non drop frame format
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int64_t timecode_frame_start;
-/* The RTP callback: This function is called    */
-/* every time the encoder has a packet to send. */
-/* It depends on the encoder if the data starts */
-/* with a Start Code (it should). H.263 does.   */
-/* mb_nb contains the number of macroblocks     */
-/* encoded in the RTP payload.                  */
-void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
-int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
-/* do its best to deliver a chunk with size     */
-/* below rtp_payload_size, the chunk will start */
-/* with a start code on some codecs like H.263. */
-/* This doesn't take account of any particular  */
-/* headers inside the transmitted RTP payload.  */
-/* statistics, used for 2-pass encoding */
-int mv_bits;
-int header_bits;
-int i_tex_bits;
-int p_tex_bits;
-int i_count;
-int p_count;
-int skip_count;
-int misc_bits;
-/**
-* number of bits used for the previously encoded frame
-* - encoding: Set by libavcodec.
-* - decoding: unused
-*/
-int frame_bits;
-/**
-* pass1 encoding statistics output buffer
-* - encoding: Set by libavcodec.
-* - decoding: unused
-*/
-char *stats_out;
-/**
-* pass2 encoding statistics input buffer
-* Concatenated stuff from stats_out of pass1 should be placed here.
-* - encoding: Allocated/set/freed by user.
-* - decoding: unused
-*/
-char *stats_in;
-/**
-* Work around bugs in encoders which sometimes cannot be detected automatically.
-* - encoding: Set by user
-* - decoding: Set by user
-*/
-int workaround_bugs;
-#define FF_BUG_AUTODETECT       1  ///< autodetection
-#define FF_BUG_OLD_MSMPEG4      2
-#define FF_BUG_XVID_ILACE       4
-#define FF_BUG_UMP4             8
-#define FF_BUG_NO_PADDING       16
-#define FF_BUG_AMV              32
-#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
-#define FF_BUG_QPEL_CHROMA      64
-#define FF_BUG_STD_QPEL         128
-#define FF_BUG_QPEL_CHROMA2     256
-#define FF_BUG_DIRECT_BLOCKSIZE 512
-#define FF_BUG_EDGE             1024
-#define FF_BUG_HPEL_CHROMA      2048
-#define FF_BUG_DC_CLIP          4096
-#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
-#define FF_BUG_TRUNCATED       16384
-/**
-* strictly follow the standard (MPEG4, ...).
-* - encoding: Set by user.
-* - decoding: Set by user.
-* Setting this to STRICT or higher means the encoder and decoder will
-* generally do stupid things, whereas setting it to unofficial or lower
-* will mean the encoder might produce output that is not supported by all
-* spec-compliant decoders. Decoders don't differentiate between normal,
-* unofficial and experimental (that is, they always try to decode things
-* when they can) unless they are explicitly asked to behave stupidly
-* (=strictly conform to the specs)
-*/
-int strict_std_compliance;
-#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
-#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
-#define FF_COMPLIANCE_NORMAL        0
-#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
-#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
-/**
-* error concealment flags
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int error_concealment;
-#define FF_EC_GUESS_MVS   1
-#define FF_EC_DEBLOCK     2
-/**
-* debug
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int debug;
-#define FF_DEBUG_PICT_INFO   1
-#define FF_DEBUG_RC          2
-#define FF_DEBUG_BITSTREAM   4
-#define FF_DEBUG_MB_TYPE     8
-#define FF_DEBUG_QP          16
-#define FF_DEBUG_MV          32
-#define FF_DEBUG_DCT_COEFF   0x00000040
-#define FF_DEBUG_SKIP        0x00000080
-#define FF_DEBUG_STARTCODE   0x00000100
-#define FF_DEBUG_PTS         0x00000200
-#define FF_DEBUG_ER          0x00000400
-#define FF_DEBUG_MMCO        0x00000800
-#define FF_DEBUG_BUGS        0x00001000
-#define FF_DEBUG_VIS_QP      0x00002000
-#define FF_DEBUG_VIS_MB_TYPE 0x00004000
-#define FF_DEBUG_BUFFERS     0x00008000
-#define FF_DEBUG_THREADS     0x00010000
-/**
-* debug
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int debug_mv;
-#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
-#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
-#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
-/**
-* Error recognition; may misdetect some more or less valid parts as errors.
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int err_recognition;
-#define AV_EF_CRCCHECK  (1<<0)
-#define AV_EF_BITSTREAM (1<<1)
-#define AV_EF_BUFFER    (1<<2)
-#define AV_EF_EXPLODE   (1<<3)
-/**
-* opaque 64bit number (generally a PTS) that will be reordered and
-* output in AVFrame.reordered_opaque
-* @deprecated in favor of pkt_pts
-* - encoding: unused
-* - decoding: Set by user.
-*/
-int64_t reordered_opaque;
-/**
-* Hardware accelerator in use
-* - encoding: unused.
-* - decoding: Set by libavcodec
-*/
-struct AVHWAccel *hwaccel;
-/**
-* Hardware accelerator context.
-* For some hardware accelerators, a global context needs to be
-* provided by the user. In that case, this holds display-dependent
-* data Libav cannot instantiate itself. Please refer to the
-* Libav HW accelerator documentation to know how to fill this
-* is. e.g. for VA API, this is a struct vaapi_context.
-* - encoding: unused
-* - decoding: Set by user
-*/
-void *hwaccel_context;
-/**
-* error
-* - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
-* - decoding: unused
-*/
-uint64_t error[AV_NUM_DATA_POINTERS];
-/**
-* DCT algorithm, see FF_DCT_* below
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int dct_algo;
-#define FF_DCT_AUTO    0
-#define FF_DCT_FASTINT 1
-#define FF_DCT_INT     2
-#define FF_DCT_MMX     3
-#define FF_DCT_ALTIVEC 5
-#define FF_DCT_FAAN    6
-/**
-* IDCT algorithm, see FF_IDCT_* below.
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int idct_algo;
-#define FF_IDCT_AUTO          0
-#define FF_IDCT_INT           1
-#define FF_IDCT_SIMPLE        2
-#define FF_IDCT_SIMPLEMMX     3
-#if FF_API_LIBMPEG2
-#define FF_IDCT_LIBMPEG2MMX   4
-#endif
-#if FF_API_MMI
-#define FF_IDCT_MMI           5
-#endif
-#define FF_IDCT_ARM           7
-#define FF_IDCT_ALTIVEC       8
-#define FF_IDCT_SH4           9
-#define FF_IDCT_SIMPLEARM     10
-#define FF_IDCT_H264          11
-#define FF_IDCT_VP3           12
-#define FF_IDCT_IPP           13
-#define FF_IDCT_XVIDMMX       14
-#define FF_IDCT_CAVS          15
-#define FF_IDCT_SIMPLEARMV5TE 16
-#define FF_IDCT_SIMPLEARMV6   17
-#define FF_IDCT_SIMPLEVIS     18
-#define FF_IDCT_WMV2          19
-#define FF_IDCT_FAAN          20
-#define FF_IDCT_EA            21
-#define FF_IDCT_SIMPLENEON    22
-#define FF_IDCT_SIMPLEALPHA   23
-#define FF_IDCT_BINK          24
-#if FF_API_DSP_MASK
-/**
-* Unused.
-* @deprecated use av_set_cpu_flags_mask() instead.
-*/
-attribute_deprecated unsigned dsp_mask;
-#endif
-/**
-* bits per sample/pixel from the demuxer (needed for huffyuv).
-* - encoding: Set by libavcodec.
-* - decoding: Set by user.
-*/
-int bits_per_coded_sample;
-/**
-* Bits per sample/pixel of internal libavcodec pixel/sample format.
-* - encoding: set by user.
-* - decoding: set by libavcodec.
-*/
-int bits_per_raw_sample;
-/**
-* low resolution decoding, 1-> 1/2 size, 2->1/4 size
-* - encoding: unused
-* - decoding: Set by user.
-*/
-attribute_deprecated int lowres;
-/**
-* the picture in the bitstream
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-AVFrame *coded_frame;
-/**
-* thread count
-* is used to decide how many independent tasks should be passed to execute()
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int thread_count;
-/**
-* Which multithreading methods to use.
-* Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
-* so clients which cannot provide future frames should not use it.
-*
-* - encoding: Set by user, otherwise the default is used.
-* - decoding: Set by user, otherwise the default is used.
-*/
-int thread_type;
-#define FF_THREAD_FRAME   1 ///< Decode more than one frame at once
-#define FF_THREAD_SLICE   2 ///< Decode more than one part of a single frame at once
-/**
-* Which multithreading methods are in use by the codec.
-* - encoding: Set by libavcodec.
-* - decoding: Set by libavcodec.
-*/
-int active_thread_type;
-/**
-* Set by the client if its custom get_buffer() callback can be called
-* synchronously from another thread, which allows faster multithreaded decoding.
-* draw_horiz_band() will be called from other threads regardless of this setting.
-* Ignored if the default get_buffer() is used.
-* - encoding: Set by user.
-* - decoding: Set by user.
-*/
-int thread_safe_callbacks;
-/**
-* The codec may call this to execute several independent things.
-* It will return only after finishing all tasks.
-* The user may replace this with some multithreaded implementation,
-* the default implementation will execute the parts serially.
-* @param count the number of things to execute
-* - encoding: Set by libavcodec, user can override.
-* - decoding: Set by libavcodec, user can override.
-*/
-int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
-/**
-* The codec may call this to execute several independent things.
-* It will return only after finishing all tasks.
-* The user may replace this with some multithreaded implementation,
-* the default implementation will execute the parts serially.
-* Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
-* @param c context passed also to func
-* @param count the number of things to execute
-* @param arg2 argument passed unchanged to func
-* @param ret return values of executed functions, must have space for "count" values. May be NULL.
-* @param func function that will be called count times, with jobnr from 0 to count-1.
-*             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
-*             two instances of func executing at the same time will have the same threadnr.
-* @return always 0 currently, but code should handle a future improvement where when any call to func
-*         returns < 0 no further calls to func may be done and < 0 is returned.
-* - encoding: Set by libavcodec, user can override.
-* - decoding: Set by libavcodec, user can override.
-*/
-int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
-/**
-* thread opaque
-* Can be used by execute() to store some per AVCodecContext stuff.
-* - encoding: set by execute()
-* - decoding: set by execute()
-*/
-void *thread_opaque;
-/**
-* noise vs. sse weight for the nsse comparsion function
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int nsse_weight;
-/**
-* profile
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int profile;
-#define FF_PROFILE_UNKNOWN -99
-#define FF_PROFILE_RESERVED -100
-#define FF_PROFILE_AAC_MAIN 0
-#define FF_PROFILE_AAC_LOW  1
-#define FF_PROFILE_AAC_SSR  2
-#define FF_PROFILE_AAC_LTP  3
-#define FF_PROFILE_AAC_HE   4
-#define FF_PROFILE_AAC_HE_V2 28
-#define FF_PROFILE_AAC_LD   22
-#define FF_PROFILE_AAC_ELD  38
-#define FF_PROFILE_DTS         20
-#define FF_PROFILE_DTS_ES      30
-#define FF_PROFILE_DTS_96_24   40
-#define FF_PROFILE_DTS_HD_HRA  50
-#define FF_PROFILE_DTS_HD_MA   60
-#define FF_PROFILE_MPEG2_422    0
-#define FF_PROFILE_MPEG2_HIGH   1
-#define FF_PROFILE_MPEG2_SS     2
-#define FF_PROFILE_MPEG2_SNR_SCALABLE  3
-#define FF_PROFILE_MPEG2_MAIN   4
-#define FF_PROFILE_MPEG2_SIMPLE 5
-#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
-#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
-#define FF_PROFILE_H264_BASELINE             66
-#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
-#define FF_PROFILE_H264_MAIN                 77
-#define FF_PROFILE_H264_EXTENDED             88
-#define FF_PROFILE_H264_HIGH                 100
-#define FF_PROFILE_H264_HIGH_10              110
-#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_HIGH_422             122
-#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_HIGH_444             144
-#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
-#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
-#define FF_PROFILE_H264_CAVLC_444            44
-#define FF_PROFILE_VC1_SIMPLE   0
-#define FF_PROFILE_VC1_MAIN     1
-#define FF_PROFILE_VC1_COMPLEX  2
-#define FF_PROFILE_VC1_ADVANCED 3
-#define FF_PROFILE_MPEG4_SIMPLE                     0
-#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE            1
-#define FF_PROFILE_MPEG4_CORE                       2
-#define FF_PROFILE_MPEG4_MAIN                       3
-#define FF_PROFILE_MPEG4_N_BIT                      4
-#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE           5
-#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION      6
-#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE     7
-#define FF_PROFILE_MPEG4_HYBRID                     8
-#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME         9
-#define FF_PROFILE_MPEG4_CORE_SCALABLE             10
-#define FF_PROFILE_MPEG4_ADVANCED_CODING           11
-#define FF_PROFILE_MPEG4_ADVANCED_CORE             12
-#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
-#define FF_PROFILE_MPEG4_SIMPLE_STUDIO             14
-#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE           15
-/**
-* level
-* - encoding: Set by user.
-* - decoding: Set by libavcodec.
-*/
-int level;
-#define FF_LEVEL_UNKNOWN -99
-/**
-*
-* - encoding: unused
-* - decoding: Set by user.
-*/
-enum AVDiscard skip_loop_filter;
-/**
-*
-* - encoding: unused
-* - decoding: Set by user.
-*/
-enum AVDiscard skip_idct;
-/**
-*
-* - encoding: unused
-* - decoding: Set by user.
-*/
-enum AVDiscard skip_frame;
-/**
-* Header containing style information for text subtitles.
-* For SUBTITLE_ASS subtitle type, it should contain the whole ASS
-* [Script Info] and [V4+ Styles] section, plus the [Events] line and
-* the Format line following. It shouldn't include any Dialogue line.
-* - encoding: Set/allocated/freed by user (before avcodec_open2())
-* - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
-*/
-uint8_t *subtitle_header;
-int subtitle_header_size;
-/**
-* Simulates errors in the bitstream to test error concealment.
-* - encoding: Set by user.
-* - decoding: unused
-*/
-int error_rate;
-/**
-* Current packet as passed into the decoder, to avoid having
-* to pass the packet into every function. Currently only valid
-* inside lavc and get/release_buffer callbacks.
-* - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
-* - encoding: unused
-*/
-AVPacket *pkt;
-/**
-* VBV delay coded in the last frame (in periods of a 27 MHz clock).
-* Used for compliant TS muxing.
-* - encoding: Set by libavcodec.
-* - decoding: unused.
-*/
-uint64_t vbv_delay;
-} AVCodecContext;
-/**
-* AVProfile.
-*/
-typedef struct AVProfile {
-int profile;
-const char *name; ///< short name for the profile
-} AVProfile;
-typedef struct AVCodecDefault AVCodecDefault;
-struct AVSubtitle;
-/**
-* AVCodec.
-*/
-typedef struct AVCodec {
-/**
-* Name of the codec implementation.
-* The name is globally unique among encoders and among decoders (but an
-* encoder and a decoder can share the same name).
-* This is the primary way to find a codec from the user perspective.
-*/
-const char *name;
-/**
-* Descriptive name for the codec, meant to be more human readable than name.
-* You should use the NULL_IF_CONFIG_SMALL() macro to define it.
-*/
-const char *long_name;
-enum AVMediaType type;
-enum AVCodecID id;
-/**
-* Codec capabilities.
-* see CODEC_CAP_*
-*/
-int capabilities;
-const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
-const enum AVPixelFormat *pix_fmts;     ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
-const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
-const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
-const uint64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
-attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
-const AVClass *priv_class;              ///< AVClass for the private context
-const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
-/*****************************************************************
-* No fields below this line are part of the public API. They
-* may not be used outside of libavcodec and can be changed and
-* removed at will.
-* New public fields should be added right above.
-*****************************************************************
-*/
-int priv_data_size;
-struct AVCodec *next;
-/**
-* @name Frame-level threading support functions
-* @{
-*/
-/**
-* If defined, called on thread contexts when they are created.
-* If the codec allocates writable tables in init(), re-allocate them here.
-* priv_data will be set to a copy of the original.
-*/
-int (*init_thread_copy)(AVCodecContext *);
-/**
-* Copy necessary context variables from a previous thread context to the current one.
-* If not defined, the next thread will start automatically; otherwise, the codec
-* must call ff_thread_finish_setup().
-*
-* dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
-*/
-int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
-/** @} */
-/**
-* Private codec-specific defaults.
-*/
-const AVCodecDefault *defaults;
-/**
-* Initialize codec static data, called from avcodec_register().
-*/
-void (*init_static_data)(struct AVCodec *codec);
-int (*init)(AVCodecContext *);
-int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
-const struct AVSubtitle *sub);
-/**
-* Encode data to an AVPacket.
-*
-* @param      avctx          codec context
-* @param      avpkt          output AVPacket (may contain a user-provided buffer)
-* @param[in]  frame          AVFrame containing the raw data to be encoded
-* @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
-*                            non-empty packet was returned in avpkt.
-* @return 0 on success, negative error code on failure
-*/
-int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
-int *got_packet_ptr);
-int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
-int (*close)(AVCodecContext *);
-/**
-* Flush buffers.
-* Will be called when seeking
-*/
-void (*flush)(AVCodecContext *);
-} AVCodec;
-/**
-* AVHWAccel.
-*/
-typedef struct AVHWAccel {
-/**
-* Name of the hardware accelerated codec.
-* The name is globally unique among encoders and among decoders (but an
-* encoder and a decoder can share the same name).
-*/
-const char *name;
-/**
-* Type of codec implemented by the hardware accelerator.
-*
-* See AVMEDIA_TYPE_xxx
-*/
-enum AVMediaType type;
-/**
-* Codec implemented by the hardware accelerator.
-*
-* See AV_CODEC_ID_xxx
-*/
-enum AVCodecID id;
-/**
-* Supported pixel format.
-*
-* Only hardware accelerated formats are supported here.
-*/
-enum AVPixelFormat pix_fmt;
-/**
-* Hardware accelerated codec capabilities.
-* see FF_HWACCEL_CODEC_CAP_*
-*/
-int capabilities;
-struct AVHWAccel *next;
-/**
-* Called at the beginning of each frame or field picture.
-*
-* Meaningful frame information (codec specific) is guaranteed to
-* be parsed at this point. This function is mandatory.
-*
-* Note that buf can be NULL along with buf_size set to 0.
-* Otherwise, this means the whole frame is available at this point.
-*
-* @param avctx the codec context
-* @param buf the frame data buffer base
-* @param buf_size the size of the frame in bytes
-* @return zero if successful, a negative value otherwise
-*/
-int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
-/**
-* Callback for each slice.
-*
-* Meaningful slice information (codec specific) is guaranteed to
-* be parsed at this point. This function is mandatory.
-*
-* @param avctx the codec context
-* @param buf the slice data buffer base
-* @param buf_size the size of the slice in bytes
-* @return zero if successful, a negative value otherwise
-*/
-int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
-/**
-* Called at the end of each frame or field picture.
-*
-* The whole picture is parsed at this point and can now be sent
-* to the hardware accelerator. This function is mandatory.
-*
-* @param avctx the codec context
-* @return zero if successful, a negative value otherwise
-*/
-int (*end_frame)(AVCodecContext *avctx);
-/**
-* Size of HW accelerator private data.
-*
-* Private data is allocated with av_mallocz() before
-* AVCodecContext.get_buffer() and deallocated after
-* AVCodecContext.release_buffer().
-*/
-int priv_data_size;
-} AVHWAccel;
-/**
-* @defgroup lavc_picture AVPicture
-*
-* Functions for working with AVPicture
-* @{
-*/
-/**
-* four components are given, that's all.
-* the last component is alpha
-*/
-typedef struct AVPicture {
-uint8_t *data[AV_NUM_DATA_POINTERS];
-int linesize[AV_NUM_DATA_POINTERS];     ///< number of bytes per line
-} AVPicture;
-/**
-* @}
-*/
-#define AVPALETTE_SIZE 1024
-#define AVPALETTE_COUNT 256
-enum AVSubtitleType {
-SUBTITLE_NONE,
-SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
-/**
-* Plain text, the text field must be set by the decoder and is
-* authoritative. ass and pict fields may contain approximations.
-*/
-SUBTITLE_TEXT,
-/**
-* Formatted text, the ass field must be set by the decoder and is
-* authoritative. pict and text fields may contain approximations.
-*/
-SUBTITLE_ASS,
-};
-typedef struct AVSubtitleRect {
-int x;         ///< top left corner  of pict, undefined when pict is not set
-int y;         ///< top left corner  of pict, undefined when pict is not set
-int w;         ///< width            of pict, undefined when pict is not set
-int h;         ///< height           of pict, undefined when pict is not set
-int nb_colors; ///< number of colors in pict, undefined when pict is not set
-/**
-* data+linesize for the bitmap of this subtitle.
-* can be set for text/ass as well once they where rendered
-*/
-AVPicture pict;
-enum AVSubtitleType type;
-char *text;                     ///< 0 terminated plain UTF-8 text
-/**
-* 0 terminated ASS/SSA compatible event line.
-* The pressentation of this is unaffected by the other values in this
-* struct.
-*/
-char *ass;
-} AVSubtitleRect;
-typedef struct AVSubtitle {
-uint16_t format; /* 0 = graphics */
-uint32_t start_display_time; /* relative to packet pts, in ms */
-uint32_t end_display_time; /* relative to packet pts, in ms */
-unsigned num_rects;
-AVSubtitleRect **rects;
-int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
-} AVSubtitle;
-/**
-* If c is NULL, returns the first registered codec,
-* if c is non-NULL, returns the next registered codec after c,
-* or NULL if c is the last one.
-*/
-AVCodec *av_codec_next(const AVCodec *c);
-/**
-* Return the LIBAVCODEC_VERSION_INT constant.
-*/
-unsigned avcodec_version(void);
-/**
-* Return the libavcodec build-time configuration.
-*/
-const char *avcodec_configuration(void);
-/**
-* Return the libavcodec license.
-*/
-const char *avcodec_license(void);
-/**
-* Register the codec codec and initialize libavcodec.
-*
-* @warning either this function or avcodec_register_all() must be called
-* before any other libavcodec functions.
-*
-* @see avcodec_register_all()
-*/
-void avcodec_register(AVCodec *codec);
-/**
-* Register all the codecs, parsers and bitstream filters which were enabled at
-* configuration time. If you do not call this function you can select exactly
-* which formats you want to support, by using the individual registration
-* functions.
-*
-* @see avcodec_register
-* @see av_register_codec_parser
-* @see av_register_bitstream_filter
-*/
-void avcodec_register_all(void);
-/**
-* Allocate an AVCodecContext and set its fields to default values.  The
-* resulting struct can be deallocated by calling avcodec_close() on it followed
-* by av_free().
-*
-* @param codec if non-NULL, allocate private data and initialize defaults
-*              for the given codec. It is illegal to then call avcodec_open2()
-*              with a different codec.
-*              If NULL, then the codec-specific defaults won't be initialized,
-*              which may result in suboptimal default settings (this is
-*              important mainly for encoders, e.g. libx264).
-*
-* @return An AVCodecContext filled with default values or NULL on failure.
-* @see avcodec_get_context_defaults
-*/
-AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
-/**
-* Set the fields of the given AVCodecContext to default values corresponding
-* to the given codec (defaults may be codec-dependent).
-*
-* Do not call this function if a non-NULL codec has been passed
-* to avcodec_alloc_context3() that allocated this AVCodecContext.
-* If codec is non-NULL, it is illegal to call avcodec_open2() with a
-* different codec on this AVCodecContext.
-*/
-int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
-/**
-* Get the AVClass for AVCodecContext. It can be used in combination with
-* AV_OPT_SEARCH_FAKE_OBJ for examining options.
-*
-* @see av_opt_find().
-*/
-const AVClass *avcodec_get_class(void);
-/**
-* Copy the settings of the source AVCodecContext into the destination
-* AVCodecContext. The resulting destination codec context will be
-* unopened, i.e. you are required to call avcodec_open2() before you
-* can use this AVCodecContext to decode/encode video/audio data.
-*
-* @param dest target codec context, should be initialized with
-*             avcodec_alloc_context3(), but otherwise uninitialized
-* @param src source codec context
-* @return AVERROR() on error (e.g. memory allocation error), 0 on success
-*/
-int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
-/**
-* Allocate an AVFrame and set its fields to default values.  The resulting
-* struct must be freed using avcodec_free_frame().
-*
-* @return An AVFrame filled with default values or NULL on failure.
-* @see avcodec_get_frame_defaults
-*/
-AVFrame *avcodec_alloc_frame(void);
-/**
-* Set the fields of the given AVFrame to default values.
-*
-* @param frame The AVFrame of which the fields should be set to default values.
-*/
-void avcodec_get_frame_defaults(AVFrame *frame);
-/**
-* Free the frame and any dynamically allocated objects in it,
-* e.g. extended_data.
-*
-* @param frame frame to be freed. The pointer will be set to NULL.
-*
-* @warning this function does NOT free the data buffers themselves
-* (it does not know how, since they might have been allocated with
-*  a custom get_buffer()).
-*/
-void avcodec_free_frame(AVFrame **frame);
-/**
-* Initialize the AVCodecContext to use the given AVCodec. Prior to using this
-* function the context has to be allocated with avcodec_alloc_context3().
-*
-* The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
-* avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
-* retrieving a codec.
-*
-* @warning This function is not thread safe!
-*
-* @code
-* avcodec_register_all();
-* av_dict_set(&opts, "b", "2.5M", 0);
-* codec = avcodec_find_decoder(AV_CODEC_ID_H264);
-* if (!codec)
-*     exit(1);
-*
-* context = avcodec_alloc_context3(codec);
-*
-* if (avcodec_open2(context, codec, opts) < 0)
-*     exit(1);
-* @endcode
-*
-* @param avctx The context to initialize.
-* @param codec The codec to open this context for. If a non-NULL codec has been
-*              previously passed to avcodec_alloc_context3() or
-*              avcodec_get_context_defaults3() for this context, then this
-*              parameter MUST be either NULL or equal to the previously passed
-*              codec.
-* @param options A dictionary filled with AVCodecContext and codec-private options.
-*                On return this object will be filled with options that were not found.
-*
-* @return zero on success, a negative value on error
-* @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
-*      av_dict_set(), av_opt_find().
-*/
-int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
-/**
-* Close a given AVCodecContext and free all the data associated with it
-* (but not the AVCodecContext itself).
-*
-* Calling this function on an AVCodecContext that hasn't been opened will free
-* the codec-specific data allocated in avcodec_alloc_context3() /
-* avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
-* do nothing.
-*/
-int avcodec_close(AVCodecContext *avctx);
-/**
-* Free all allocated data in the given subtitle struct.
-*
-* @param sub AVSubtitle to free.
-*/
-void avsubtitle_free(AVSubtitle *sub);
-/**
-* @}
-*/
-/**
-* @addtogroup lavc_packet
-* @{
-*/
-/**
-* Default packet destructor.
-*/
-void av_destruct_packet(AVPacket *pkt);
-/**
-* Initialize optional fields of a packet with default values.
-*
-* Note, this does not touch the data and size members, which have to be
-* initialized separately.
-*
-* @param pkt packet
-*/
-void av_init_packet(AVPacket *pkt);
-/**
-* Allocate the payload of a packet and initialize its fields with
-* default values.
-*
-* @param pkt packet
-* @param size wanted payload size
-* @return 0 if OK, AVERROR_xxx otherwise
-*/
-int av_new_packet(AVPacket *pkt, int size);
-/**
-* Reduce packet size, correctly zeroing padding
-*
-* @param pkt packet
-* @param size new size
-*/
-void av_shrink_packet(AVPacket *pkt, int size);
-/**
-* Increase packet size, correctly zeroing padding
-*
-* @param pkt packet
-* @param grow_by number of bytes by which to increase the size of the packet
-*/
-int av_grow_packet(AVPacket *pkt, int grow_by);
-/**
-* @warning This is a hack - the packet memory allocation stuff is broken. The
-* packet is allocated if it was not really allocated.
-*/
-int av_dup_packet(AVPacket *pkt);
-/**
-* Free a packet.
-*
-* @param pkt packet to free
-*/
-void av_free_packet(AVPacket *pkt);
-/**
-* Allocate new information of a packet.
-*
-* @param pkt packet
-* @param type side information type
-* @param size side information size
-* @return pointer to fresh allocated data or NULL otherwise
-*/
-uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-int size);
-/**
-* Shrink the already allocated side data buffer
-*
-* @param pkt packet
-* @param type side information type
-* @param size new side information size
-* @return 0 on success, < 0 on failure
-*/
-int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-int size);
-/**
-* Get side information from packet.
-*
-* @param pkt packet
-* @param type desired side information type
-* @param size pointer for side information size to store (optional)
-* @return pointer to data if present or NULL otherwise
-*/
-uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-int *size);
-/**
-* @}
-*/
-/**
-* @addtogroup lavc_decoding
-* @{
-*/
-/**
-* Find a registered decoder with a matching codec ID.
-*
-* @param id AVCodecID of the requested decoder
-* @return A decoder if one was found, NULL otherwise.
-*/
-AVCodec *avcodec_find_decoder(enum AVCodecID id);
-/**
-* Find a registered decoder with the specified name.
-*
-* @param name name of the requested decoder
-* @return A decoder if one was found, NULL otherwise.
-*/
-AVCodec *avcodec_find_decoder_by_name(const char *name);
-int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
-void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
-int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
-/**
-* Return the amount of padding in pixels which the get_buffer callback must
-* provide around the edge of the image for codecs which do not have the
-* CODEC_FLAG_EMU_EDGE flag.
-*
-* @return Required padding in pixels.
-*/
-unsigned avcodec_get_edge_width(void);
-/**
-* Modify width and height values so that they will result in a memory
-* buffer that is acceptable for the codec if you do not use any horizontal
-* padding.
-*
-* May only be used if a codec with CODEC_CAP_DR1 has been opened.
-* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
-* according to avcodec_get_edge_width() before.
-*/
-void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
-/**
-* Modify width and height values so that they will result in a memory
-* buffer that is acceptable for the codec if you also ensure that all
-* line sizes are a multiple of the respective linesize_align[i].
-*
-* May only be used if a codec with CODEC_CAP_DR1 has been opened.
-* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
-* according to avcodec_get_edge_width() before.
-*/
-void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
-int linesize_align[AV_NUM_DATA_POINTERS]);
-#if FF_API_OLD_DECODE_AUDIO
-/**
-* Wrapper function which calls avcodec_decode_audio4.
-*
-* @deprecated Use avcodec_decode_audio4 instead.
-*
-* Decode the audio frame of size avpkt->size from avpkt->data into samples.
-* Some decoders may support multiple frames in a single AVPacket, such
-* decoders would then just decode the first frame. In this case,
-* avcodec_decode_audio3 has to be called again with an AVPacket that contains
-* the remaining data in order to decode the second frame etc.
-* If no frame
-* could be outputted, frame_size_ptr is zero. Otherwise, it is the
-* decompressed frame size in bytes.
-*
-* @warning You must set frame_size_ptr to the allocated size of the
-* output buffer before calling avcodec_decode_audio3().
-*
-* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
-* the actual read bytes because some optimized bitstream readers read 32 or 64
-* bits at once and could read over the end.
-*
-* @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
-* no overreading happens for damaged MPEG streams.
-*
-* @warning You must not provide a custom get_buffer() when using
-* avcodec_decode_audio3().  Doing so will override it with
-* avcodec_default_get_buffer.  Use avcodec_decode_audio4() instead,
-* which does allow the application to provide a custom get_buffer().
-*
-* @note You might have to align the input buffer avpkt->data and output buffer
-* samples. The alignment requirements depend on the CPU: On some CPUs it isn't
-* necessary at all, on others it won't work at all if not aligned and on others
-* it will work but it will have an impact on performance.
-*
-* In practice, avpkt->data should have 4 byte alignment at minimum and
-* samples should be 16 byte aligned unless the CPU doesn't need it
-* (AltiVec and SSE do).
-*
-* @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
-* between input and output, these need to be fed with avpkt->data=NULL,
-* avpkt->size=0 at the end to return the remaining frames.
-*
-* @param avctx the codec context
-* @param[out] samples the output buffer, sample type in avctx->sample_fmt
-*                     If the sample format is planar, each channel plane will
-*                     be the same size, with no padding between channels.
-* @param[in,out] frame_size_ptr the output buffer size in bytes
-* @param[in] avpkt The input AVPacket containing the input buffer.
-*            You can create such packet with av_init_packet() and by then setting
-*            data and size, some decoders might in addition need other fields.
-*            All decoders are designed to use the least fields possible though.
-* @return On error a negative value is returned, otherwise the number of bytes
-* used or zero if no frame data was decompressed (used) from the input AVPacket.
-*/
-attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
-int *frame_size_ptr,
-AVPacket *avpkt);
-#endif
-/**
-* Decode the audio frame of size avpkt->size from avpkt->data into frame.
-*
-* Some decoders may support multiple frames in a single AVPacket. Such
-* decoders would then just decode the first frame. In this case,
-* avcodec_decode_audio4 has to be called again with an AVPacket containing
-* the remaining data in order to decode the second frame, etc...
-* Even if no frames are returned, the packet needs to be fed to the decoder
-* with remaining data until it is completely consumed or an error occurs.
-*
-* @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE
-*          larger than the actual read bytes because some optimized bitstream
-*          readers read 32 or 64 bits at once and could read over the end.
-*
-* @note You might have to align the input buffer. The alignment requirements
-*       depend on the CPU and the decoder.
-*
-* @param      avctx the codec context
-* @param[out] frame The AVFrame in which to store decoded audio samples.
-*                   Decoders request a buffer of a particular size by setting
-*                   AVFrame.nb_samples prior to calling get_buffer(). The
-*                   decoder may, however, only utilize part of the buffer by
-*                   setting AVFrame.nb_samples to a smaller value in the
-*                   output frame.
-* @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
-*                           non-zero.
-* @param[in]  avpkt The input AVPacket containing the input buffer.
-*                   At least avpkt->data and avpkt->size should be set. Some
-*                   decoders might also require additional fields to be set.
-* @return A negative error code is returned if an error occurred during
-*         decoding, otherwise the number of bytes consumed from the input
-*         AVPacket is returned.
-*/
-int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
-int *got_frame_ptr, AVPacket *avpkt);
-/**
-* Decode the video frame of size avpkt->size from avpkt->data into picture.
-* Some decoders may support multiple frames in a single AVPacket, such
-* decoders would then just decode the first frame.
-*
-* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
-* the actual read bytes because some optimized bitstream readers read 32 or 64
-* bits at once and could read over the end.
-*
-* @warning The end of the input buffer buf should be set to 0 to ensure that
-* no overreading happens for damaged MPEG streams.
-*
-* @note You might have to align the input buffer avpkt->data.
-* The alignment requirements depend on the CPU: on some CPUs it isn't
-* necessary at all, on others it won't work at all if not aligned and on others
-* it will work but it will have an impact on performance.
-*
-* In practice, avpkt->data should have 4 byte alignment at minimum.
-*
-* @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
-* between input and output, these need to be fed with avpkt->data=NULL,
-* avpkt->size=0 at the end to return the remaining frames.
-*
-* @param avctx the codec context
-* @param[out] picture The AVFrame in which the decoded video frame will be stored.
-*             Use avcodec_alloc_frame to get an AVFrame, the codec will
-*             allocate memory for the actual bitmap.
-*             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
-*             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
-*                   decodes and the decoder tells the user once it does not need the data anymore,
-*                   the user app can at this point free/reuse/keep the memory as it sees fit.
-*
-* @param[in] avpkt The input AVpacket containing the input buffer.
-*            You can create such packet with av_init_packet() and by then setting
-*            data and size, some decoders might in addition need other fields like
-*            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
-*            fields possible.
-* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
-* @return On error a negative value is returned, otherwise the number of bytes
-* used or zero if no frame could be decompressed.
-*/
-int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
-int *got_picture_ptr,
-AVPacket *avpkt);
-/**
-* Decode a subtitle message.
-* Return a negative value on error, otherwise return the number of bytes used.
-* If no subtitle could be decompressed, got_sub_ptr is zero.
-* Otherwise, the subtitle is stored in *sub.
-* Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
-* simplicity, because the performance difference is expect to be negligible
-* and reusing a get_buffer written for video codecs would probably perform badly
-* due to a potentially very different allocation pattern.
-*
-* @param avctx the codec context
-* @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
-freed with avsubtitle_free if *got_sub_ptr is set.
-* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
-* @param[in] avpkt The input AVPacket containing the input buffer.
-*/
-int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
-int *got_sub_ptr,
-AVPacket *avpkt);
-/**
-* @defgroup lavc_parsing Frame parsing
-* @{
-*/
-typedef struct AVCodecParserContext {
-void *priv_data;
-struct AVCodecParser *parser;
-int64_t frame_offset; /* offset of the current frame */
-int64_t cur_offset; /* current offset
-(incremented by each av_parser_parse()) */
-int64_t next_frame_offset; /* offset of the next frame */
-/* video info */
-int pict_type; /* XXX: Put it back in AVCodecContext. */
-/**
-* This field is used for proper frame duration computation in lavf.
-* It signals, how much longer the frame duration of the current frame
-* is compared to normal frame duration.
-*
-* frame_duration = (1 + repeat_pict) * time_base
-*
-* It is used by codecs like H.264 to display telecined material.
-*/
-int repeat_pict; /* XXX: Put it back in AVCodecContext. */
-int64_t pts;     /* pts of the current frame */
-int64_t dts;     /* dts of the current frame */
-/* private data */
-int64_t last_pts;
-int64_t last_dts;
-int fetch_timestamp;
-#define AV_PARSER_PTS_NB 4
-int cur_frame_start_index;
-int64_t cur_frame_offset[AV_PARSER_PTS_NB];
-int64_t cur_frame_pts[AV_PARSER_PTS_NB];
-int64_t cur_frame_dts[AV_PARSER_PTS_NB];
-int flags;
-#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
-#define PARSER_FLAG_ONCE                      0x0002
-/// Set if the parser has a valid file offset
-#define PARSER_FLAG_FETCHED_OFFSET            0x0004
-int64_t offset;      ///< byte offset from starting packet start
-int64_t cur_frame_end[AV_PARSER_PTS_NB];
-/**
-* Set by parser to 1 for key frames and 0 for non-key frames.
-* It is initialized to -1, so if the parser doesn't set this flag,
-* old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
-* will be used.
-*/
-int key_frame;
-/**
-* Time difference in stream time base units from the pts of this
-* packet to the point at which the output from the decoder has converged
-* independent from the availability of previous frames. That is, the
-* frames are virtually identical no matter if decoding started from
-* the very first frame or from this keyframe.
-* Is AV_NOPTS_VALUE if unknown.
-* This field is not the display duration of the current frame.
-* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
-* set.
-*
-* The purpose of this field is to allow seeking in streams that have no
-* keyframes in the conventional sense. It corresponds to the
-* recovery point SEI in H.264 and match_time_delta in NUT. It is also
-* essential for some types of subtitle streams to ensure that all
-* subtitles are correctly displayed after seeking.
-*/
-int64_t convergence_duration;
-// Timestamp generation support:
-/**
-* Synchronization point for start of timestamp generation.
-*
-* Set to >0 for sync point, 0 for no sync point and <0 for undefined
-* (default).
-*
-* For example, this corresponds to presence of H.264 buffering period
-* SEI message.
-*/
-int dts_sync_point;
-/**
-* Offset of the current timestamp against last timestamp sync point in
-* units of AVCodecContext.time_base.
-*
-* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
-* contain a valid timestamp offset.
-*
-* Note that the timestamp of sync point has usually a nonzero
-* dts_ref_dts_delta, which refers to the previous sync point. Offset of
-* the next frame after timestamp sync point will be usually 1.
-*
-* For example, this corresponds to H.264 cpb_removal_delay.
-*/
-int dts_ref_dts_delta;
-/**
-* Presentation delay of current frame in units of AVCodecContext.time_base.
-*
-* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
-* contain valid non-negative timestamp delta (presentation time of a frame
-* must not lie in the past).
-*
-* This delay represents the difference between decoding and presentation
-* time of the frame.
-*
-* For example, this corresponds to H.264 dpb_output_delay.
-*/
-int pts_dts_delta;
-/**
-* Position of the packet in file.
-*
-* Analogous to cur_frame_pts/dts
-*/
-int64_t cur_frame_pos[AV_PARSER_PTS_NB];
-/**
-* Byte position of currently parsed frame in stream.
-*/
-int64_t pos;
-/**
-* Previous frame byte position.
-*/
-int64_t last_pos;
-/**
-* Duration of the current frame.
-* For audio, this is in units of 1 / AVCodecContext.sample_rate.
-* For all other types, this is in units of AVCodecContext.time_base.
-*/
-int duration;
-} AVCodecParserContext;
-typedef struct AVCodecParser {
-int codec_ids[5]; /* several codec IDs are permitted */
-int priv_data_size;
-int (*parser_init)(AVCodecParserContext *s);
-int (*parser_parse)(AVCodecParserContext *s,
-AVCodecContext *avctx,
-const uint8_t **poutbuf, int *poutbuf_size,
-const uint8_t *buf, int buf_size);
-void (*parser_close)(AVCodecParserContext *s);
-int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
-struct AVCodecParser *next;
-} AVCodecParser;
-AVCodecParser *av_parser_next(AVCodecParser *c);
-void av_register_codec_parser(AVCodecParser *parser);
-AVCodecParserContext *av_parser_init(int codec_id);
-/**
-* Parse a packet.
-*
-* @param s             parser context.
-* @param avctx         codec context.
-* @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
-* @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
-* @param buf           input buffer.
-* @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
-* @param pts           input presentation timestamp.
-* @param dts           input decoding timestamp.
-* @param pos           input byte position in stream.
-* @return the number of bytes of the input bitstream used.
-*
-* Example:
-* @code
-*   while(in_len){
-*       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
-*                                        in_data, in_len,
-*                                        pts, dts, pos);
-*       in_data += len;
-*       in_len  -= len;
-*
-*       if(size)
-*          decode_frame(data, size);
-*   }
-* @endcode
-*/
-int av_parser_parse2(AVCodecParserContext *s,
-AVCodecContext *avctx,
-uint8_t **poutbuf, int *poutbuf_size,
-const uint8_t *buf, int buf_size,
-int64_t pts, int64_t dts,
-int64_t pos);
-int av_parser_change(AVCodecParserContext *s,
-AVCodecContext *avctx,
-uint8_t **poutbuf, int *poutbuf_size,
-const uint8_t *buf, int buf_size, int keyframe);
-void av_parser_close(AVCodecParserContext *s);
-/**
-* @}
-* @}
-*/
-/**
-* @addtogroup lavc_encoding
-* @{
-*/
-/**
-* Find a registered encoder with a matching codec ID.
-*
-* @param id AVCodecID of the requested encoder
-* @return An encoder if one was found, NULL otherwise.
-*/
-AVCodec *avcodec_find_encoder(enum AVCodecID id);
-/**
-* Find a registered encoder with the specified name.
-*
-* @param name name of the requested encoder
-* @return An encoder if one was found, NULL otherwise.
-*/
-AVCodec *avcodec_find_encoder_by_name(const char *name);
-#if FF_API_OLD_ENCODE_AUDIO
-/**
-* Encode an audio frame from samples into buf.
-*
-* @deprecated Use avcodec_encode_audio2 instead.
-*
-* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
-* However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
-* will know how much space is needed because it depends on the value passed
-* in buf_size as described below. In that case a lower value can be used.
-*
-* @param avctx the codec context
-* @param[out] buf the output buffer
-* @param[in] buf_size the output buffer size
-* @param[in] samples the input buffer containing the samples
-* The number of samples read from this buffer is frame_size*channels,
-* both of which are defined in avctx.
-* For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
-* samples read from samples is equal to:
-* buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
-* This also implies that av_get_bits_per_sample() must not return 0 for these
-* codecs.
-* @return On error a negative value is returned, on success zero or the number
-* of bytes used to encode the data read from the input buffer.
-*/
-int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
-uint8_t *buf, int buf_size,
-const short *samples);
-#endif
-/**
-* Encode a frame of audio.
-*
-* Takes input samples from frame and writes the next output packet, if
-* available, to avpkt. The output packet does not necessarily contain data for
-* the most recent frame, as encoders can delay, split, and combine input frames
-* internally as needed.
-*
-* @param avctx     codec context
-* @param avpkt     output AVPacket.
-*                  The user can supply an output buffer by setting
-*                  avpkt->data and avpkt->size prior to calling the
-*                  function, but if the size of the user-provided data is not
-*                  large enough, encoding will fail. All other AVPacket fields
-*                  will be reset by the encoder using av_init_packet(). If
-*                  avpkt->data is NULL, the encoder will allocate it.
-*                  The encoder will set avpkt->size to the size of the
-*                  output packet.
-*
-*                  If this function fails or produces no output, avpkt will be
-*                  freed using av_free_packet() (i.e. avpkt->destruct will be
-*                  called to free the user supplied buffer).
-* @param[in] frame AVFrame containing the raw audio data to be encoded.
-*                  May be NULL when flushing an encoder that has the
-*                  CODEC_CAP_DELAY capability set.
-*                  If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
-*                  can have any number of samples.
-*                  If it is not set, frame->nb_samples must be equal to
-*                  avctx->frame_size for all frames except the last.
-*                  The final frame may be smaller than avctx->frame_size.
-* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
-*                            output packet is non-empty, and to 0 if it is
-*                            empty. If the function returns an error, the
-*                            packet can be assumed to be invalid, and the
-*                            value of got_packet_ptr is undefined and should
-*                            not be used.
-* @return          0 on success, negative error code on failure
-*/
-int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
-const AVFrame *frame, int *got_packet_ptr);
-#if FF_API_OLD_ENCODE_VIDEO
-/**
-* @deprecated use avcodec_encode_video2() instead.
-*
-* Encode a video frame from pict into buf.
-* The input picture should be
-* stored using a specific format, namely avctx.pix_fmt.
-*
-* @param avctx the codec context
-* @param[out] buf the output buffer for the bitstream of encoded frame
-* @param[in] buf_size the size of the output buffer in bytes
-* @param[in] pict the input picture to encode
-* @return On error a negative value is returned, on success zero or the number
-* of bytes used from the output buffer.
-*/
-attribute_deprecated
-int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-const AVFrame *pict);
-#endif
-/**
-* Encode a frame of video.
-*
-* Takes input raw video data from frame and writes the next output packet, if
-* available, to avpkt. The output packet does not necessarily contain data for
-* the most recent frame, as encoders can delay and reorder input frames
-* internally as needed.
-*
-* @param avctx     codec context
-* @param avpkt     output AVPacket.
-*                  The user can supply an output buffer by setting
-*                  avpkt->data and avpkt->size prior to calling the
-*                  function, but if the size of the user-provided data is not
-*                  large enough, encoding will fail. All other AVPacket fields
-*                  will be reset by the encoder using av_init_packet(). If
-*                  avpkt->data is NULL, the encoder will allocate it.
-*                  The encoder will set avpkt->size to the size of the
-*                  output packet. The returned data (if any) belongs to the
-*                  caller, he is responsible for freeing it.
-*
-*                  If this function fails or produces no output, avpkt will be
-*                  freed using av_free_packet() (i.e. avpkt->destruct will be
-*                  called to free the user supplied buffer).
-* @param[in] frame AVFrame containing the raw video data to be encoded.
-*                  May be NULL when flushing an encoder that has the
-*                  CODEC_CAP_DELAY capability set.
-* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
-*                            output packet is non-empty, and to 0 if it is
-*                            empty. If the function returns an error, the
-*                            packet can be assumed to be invalid, and the
-*                            value of got_packet_ptr is undefined and should
-*                            not be used.
-* @return          0 on success, negative error code on failure
-*/
-int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
-const AVFrame *frame, int *got_packet_ptr);
-int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-const AVSubtitle *sub);
-/**
-* @}
-*/
-#if FF_API_AVCODEC_RESAMPLE
-/**
-* @defgroup lavc_resample Audio resampling
-* @ingroup libavc
-* @deprecated use libavresample instead
-*
-* @{
-*/
-struct ReSampleContext;
-struct AVResampleContext;
-typedef struct ReSampleContext ReSampleContext;
-/**
-*  Initialize audio resampling context.
-*
-* @param output_channels  number of output channels
-* @param input_channels   number of input channels
-* @param output_rate      output sample rate
-* @param input_rate       input sample rate
-* @param sample_fmt_out   requested output sample format
-* @param sample_fmt_in    input sample format
-* @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
-* @param log2_phase_count log2 of the number of entries in the polyphase filterbank
-* @param linear           if 1 then the used FIR filter will be linearly interpolated
-between the 2 closest, if 0 the closest will be used
-* @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
-* @return allocated ReSampleContext, NULL if error occurred
-*/
-attribute_deprecated
-ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
-int output_rate, int input_rate,
-enum AVSampleFormat sample_fmt_out,
-enum AVSampleFormat sample_fmt_in,
-int filter_length, int log2_phase_count,
-int linear, double cutoff);
-attribute_deprecated
-int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
-/**
-* Free resample context.
-*
-* @param s a non-NULL pointer to a resample context previously
-*          created with av_audio_resample_init()
-*/
-attribute_deprecated
-void audio_resample_close(ReSampleContext *s);
-/**
-* Initialize an audio resampler.
-* Note, if either rate is not an integer then simply scale both rates up so they are.
-* @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
-* @param log2_phase_count log2 of the number of entries in the polyphase filterbank
-* @param linear If 1 then the used FIR filter will be linearly interpolated
-between the 2 closest, if 0 the closest will be used
-* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
-*/
-attribute_deprecated
-struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
-/**
-* Resample an array of samples using a previously configured context.
-* @param src an array of unconsumed samples
-* @param consumed the number of samples of src which have been consumed are returned here
-* @param src_size the number of unconsumed samples available
-* @param dst_size the amount of space in samples available in dst
-* @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
-* @return the number of samples written in dst or -1 if an error occurred
-*/
-attribute_deprecated
-int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
-/**
-* Compensate samplerate/timestamp drift. The compensation is done by changing
-* the resampler parameters, so no audible clicks or similar distortions occur
-* @param compensation_distance distance in output samples over which the compensation should be performed
-* @param sample_delta number of output samples which should be output less
-*
-* example: av_resample_compensate(c, 10, 500)
-* here instead of 510 samples only 500 samples would be output
-*
-* note, due to rounding the actual compensation might be slightly different,
-* especially if the compensation_distance is large and the in_rate used during init is small
-*/
-attribute_deprecated
-void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
-attribute_deprecated
-void av_resample_close(struct AVResampleContext *c);
-/**
-* @}
-*/
-#endif
-/**
-* @addtogroup lavc_picture
-* @{
-*/
-/**
-* Allocate memory for a picture.  Call avpicture_free() to free it.
-*
-* @see avpicture_fill()
-*
-* @param picture the picture to be filled in
-* @param pix_fmt the format of the picture
-* @param width the width of the picture
-* @param height the height of the picture
-* @return zero if successful, a negative value if not
-*/
-int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
-/**
-* Free a picture previously allocated by avpicture_alloc().
-* The data buffer used by the AVPicture is freed, but the AVPicture structure
-* itself is not.
-*
-* @param picture the AVPicture to be freed
-*/
-void avpicture_free(AVPicture *picture);
-/**
-* Fill in the AVPicture fields.
-* The fields of the given AVPicture are filled in by using the 'ptr' address
-* which points to the image data buffer. Depending on the specified picture
-* format, one or multiple image data pointers and line sizes will be set.
-* If a planar format is specified, several pointers will be set pointing to
-* the different picture planes and the line sizes of the different planes
-* will be stored in the lines_sizes array.
-* Call with ptr == NULL to get the required size for the ptr buffer.
-*
-* To allocate the buffer and fill in the AVPicture fields in one call,
-* use avpicture_alloc().
-*
-* @param picture AVPicture whose fields are to be filled in
-* @param ptr Buffer which will contain or contains the actual image data
-* @param pix_fmt The format in which the picture data is stored.
-* @param width the width of the image in pixels
-* @param height the height of the image in pixels
-* @return size of the image data in bytes
-*/
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
-enum AVPixelFormat pix_fmt, int width, int height);
-/**
-* Copy pixel data from an AVPicture into a buffer.
-* The data is stored compactly, without any gaps for alignment or padding
-* which may be applied by avpicture_fill().
-*
-* @see avpicture_get_size()
-*
-* @param[in] src AVPicture containing image data
-* @param[in] pix_fmt The format in which the picture data is stored.
-* @param[in] width the width of the image in pixels.
-* @param[in] height the height of the image in pixels.
-* @param[out] dest A buffer into which picture data will be copied.
-* @param[in] dest_size The size of 'dest'.
-* @return The number of bytes written to dest, or a negative value (error code) on error.
-*/
-int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
-int width, int height,
-unsigned char *dest, int dest_size);
-/**
-* Calculate the size in bytes that a picture of the given width and height
-* would occupy if stored in the given picture format.
-* Note that this returns the size of a compact representation as generated
-* by avpicture_layout(), which can be smaller than the size required for e.g.
-* avpicture_fill().
-*
-* @param pix_fmt the given picture format
-* @param width the width of the image
-* @param height the height of the image
-* @return Image data size in bytes or -1 on error (e.g. too large dimensions).
-*/
-int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
-/**
-*  deinterlace - if not supported return -1
-*/
-int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
-enum AVPixelFormat pix_fmt, int width, int height);
-/**
-* Copy image src to dst. Wraps av_picture_data_copy() above.
-*/
-void av_picture_copy(AVPicture *dst, const AVPicture *src,
-enum AVPixelFormat pix_fmt, int width, int height);
-/**
-* Crop image top and left side.
-*/
-int av_picture_crop(AVPicture *dst, const AVPicture *src,
-enum AVPixelFormat pix_fmt, int top_band, int left_band);
-/**
-* Pad image.
-*/
-int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
-int padtop, int padbottom, int padleft, int padright, int *color);
-/**
-* @}
-*/
-/**
-* @defgroup lavc_misc Utility functions
-* @ingroup libavc
-*
-* Miscellaneous utility functions related to both encoding and decoding
-* (or neither).
-* @{
-*/
-/**
-* @defgroup lavc_misc_pixfmt Pixel formats
-*
-* Functions for working with pixel formats.
-* @{
-*/
-void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
-/**
-* Return a value representing the fourCC code associated to the
-* pixel format pix_fmt, or 0 if no associated fourCC code can be
-* found.
-*/
-unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
-#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
-#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
-#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
-#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
-#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
-#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
-/**
-* Compute what kind of losses will occur when converting from one specific
-* pixel format to another.
-* When converting from one pixel format to another, information loss may occur.
-* For example, when converting from RGB24 to GRAY, the color information will
-* be lost. Similarly, other losses occur when converting from some formats to
-* other formats. These losses can involve loss of chroma, but also loss of
-* resolution, loss of color depth, loss due to the color space conversion, loss
-* of the alpha bits or loss due to color quantization.
-* avcodec_get_fix_fmt_loss() informs you about the various types of losses
-* which will occur when converting from one pixel format to another.
-*
-* @param[in] dst_pix_fmt destination pixel format
-* @param[in] src_pix_fmt source pixel format
-* @param[in] has_alpha Whether the source pixel format alpha channel is used.
-* @return Combination of flags informing you what kind of losses will occur.
-*/
-int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
-int has_alpha);
-#if FF_API_FIND_BEST_PIX_FMT
-/**
-* @deprecated use avcodec_find_best_pix_fmt2() instead.
-*
-* Find the best pixel format to convert to given a certain source pixel
-* format.  When converting from one pixel format to another, information loss
-* may occur.  For example, when converting from RGB24 to GRAY, the color
-* information will be lost. Similarly, other losses occur when converting from
-* some formats to other formats. avcodec_find_best_pix_fmt() searches which of
-* the given pixel formats should be used to suffer the least amount of loss.
-* The pixel formats from which it chooses one, are determined by the
-* pix_fmt_mask parameter.
-*
-* @code
-* src_pix_fmt = AV_PIX_FMT_YUV420P;
-* pix_fmt_mask = (1 << AV_PIX_FMT_YUV422P) || (1 << AV_PIX_FMT_RGB24);
-* dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
-* @endcode
-*
-* @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
-* @param[in] src_pix_fmt source pixel format
-* @param[in] has_alpha Whether the source pixel format alpha channel is used.
-* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
-* @return The best pixel format to convert to or -1 if none was found.
-*/
-attribute_deprecated
-enum AVPixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum AVPixelFormat src_pix_fmt,
-int has_alpha, int *loss_ptr);
-#endif /* FF_API_FIND_BEST_PIX_FMT */
-/**
-* Find the best pixel format to convert to given a certain source pixel
-* format.  When converting from one pixel format to another, information loss
-* may occur.  For example, when converting from RGB24 to GRAY, the color
-* information will be lost. Similarly, other losses occur when converting from
-* some formats to other formats. avcodec_find_best_pix_fmt2() searches which of
-* the given pixel formats should be used to suffer the least amount of loss.
-* The pixel formats from which it chooses one, are determined by the
-* pix_fmt_list parameter.
-*
-*
-* @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
-* @param[in] src_pix_fmt source pixel format
-* @param[in] has_alpha Whether the source pixel format alpha channel is used.
-* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
-* @return The best pixel format to convert to or -1 if none was found.
-*/
-enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
-enum AVPixelFormat src_pix_fmt,
-int has_alpha, int *loss_ptr);
-enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
-/**
-* @}
-*/
-void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
-/**
-* Put a string representing the codec tag codec_tag in buf.
-*
-* @param buf_size size in bytes of buf
-* @return the length of the string that would have been generated if
-* enough space had been available, excluding the trailing null
-*/
-size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
-void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
-/**
-* Return a name for the specified profile, if available.
-*
-* @param codec the codec that is searched for the given profile
-* @param profile the profile value for which a name is requested
-* @return A name for the profile if found, NULL otherwise.
-*/
-const char *av_get_profile_name(const AVCodec *codec, int profile);
-int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
-int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
-//FIXME func typedef
-/**
-* Fill audio frame data and linesize.
-* AVFrame extended_data channel pointers are allocated if necessary for
-* planar audio.
-*
-* @param frame       the AVFrame
-*                    frame->nb_samples must be set prior to calling the
-*                    function. This function fills in frame->data,
-*                    frame->extended_data, frame->linesize[0].
-* @param nb_channels channel count
-* @param sample_fmt  sample format
-* @param buf         buffer to use for frame data
-* @param buf_size    size of buffer
-* @param align       plane size sample alignment (0 = default)
-* @return            0 on success, negative error code on failure
-*/
-int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
-enum AVSampleFormat sample_fmt, const uint8_t *buf,
-int buf_size, int align);
-/**
-* Flush buffers, should be called when seeking or when switching to a different stream.
-*/
-void avcodec_flush_buffers(AVCodecContext *avctx);
-void avcodec_default_free_buffers(AVCodecContext *s);
-/**
-* Return codec bits per sample.
-*
-* @param[in] codec_id the codec
-* @return Number of bits per sample or zero if unknown for the given codec.
-*/
-int av_get_bits_per_sample(enum AVCodecID codec_id);
-/**
-* Return codec bits per sample.
-* Only return non-zero if the bits per sample is exactly correct, not an
-* approximation.
-*
-* @param[in] codec_id the codec
-* @return Number of bits per sample or zero if unknown for the given codec.
-*/
-int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
-/**
-* Return audio frame duration.
-*
-* @param avctx        codec context
-* @param frame_bytes  size of the frame, or 0 if unknown
-* @return             frame duration, in samples, if known. 0 if not able to
-*                     determine.
-*/
-int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
-typedef struct AVBitStreamFilterContext {
-void *priv_data;
-struct AVBitStreamFilter *filter;
-AVCodecParserContext *parser;
-struct AVBitStreamFilterContext *next;
-} AVBitStreamFilterContext;
-typedef struct AVBitStreamFilter {
-const char *name;
-int priv_data_size;
-int (*filter)(AVBitStreamFilterContext *bsfc,
-AVCodecContext *avctx, const char *args,
-uint8_t **poutbuf, int *poutbuf_size,
-const uint8_t *buf, int buf_size, int keyframe);
-void (*close)(AVBitStreamFilterContext *bsfc);
-struct AVBitStreamFilter *next;
-} AVBitStreamFilter;
-void av_register_bitstream_filter(AVBitStreamFilter *bsf);
-AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
-int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
-AVCodecContext *avctx, const char *args,
-uint8_t **poutbuf, int *poutbuf_size,
-const uint8_t *buf, int buf_size, int keyframe);
-void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
-AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
-/* memory */
-/**
-* Reallocate the given block if it is not large enough, otherwise do nothing.
-*
-* @see av_realloc
-*/
-void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
-/**
-* Allocate a buffer, reusing the given one if large enough.
-*
-* Contrary to av_fast_realloc the current buffer contents might not be
-* preserved and on error the old buffer is freed, thus no special
-* handling to avoid memleaks is necessary.
-*
-* @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
-* @param size size of the buffer *ptr points to
-* @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
-*                 *size 0 if an error occurred.
-*/
-void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
-/**
-* Allocate a buffer with padding, reusing the given one if large enough.
-*
-* Same behaviour av_fast_malloc but the buffer has additional
-* FF_INPUT_PADDING_SIZE at the end which will always memset to 0.
-*
-*/
-void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
-/**
-* Encode extradata length to a buffer. Used by xiph codecs.
-*
-* @param s buffer to write to; must be at least (v/255+1) bytes long
-* @param v size of extradata in bytes
-* @return number of bytes written to the buffer.
-*/
-unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
-/**
-* Log a generic warning message about a missing feature. This function is
-* intended to be used internally by Libav (libavcodec, libavformat, etc.)
-* only, and would normally not be used by applications.
-* @param[in] avc a pointer to an arbitrary struct of which the first field is
-* a pointer to an AVClass struct
-* @param[in] feature string containing the name of the missing feature
-* @param[in] want_sample indicates if samples are wanted which exhibit this feature.
-* If want_sample is non-zero, additional verbage will be added to the log
-* message which tells the user how to report samples to the development
-* mailing list.
-*/
-void av_log_missing_feature(void *avc, const char *feature, int want_sample);
-/**
-* Log a generic warning message asking for a sample. This function is
-* intended to be used internally by Libav (libavcodec, libavformat, etc.)
-* only, and would normally not be used by applications.
-* @param[in] avc a pointer to an arbitrary struct of which the first field is
-* a pointer to an AVClass struct
-* @param[in] msg string containing an optional message, or NULL if no message
-*/
-void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3);
-/**
-* Register the hardware accelerator hwaccel.
-*/
-void av_register_hwaccel(AVHWAccel *hwaccel);
-/**
-* If hwaccel is NULL, returns the first registered hardware accelerator,
-* if hwaccel is non-NULL, returns the next registered hardware accelerator
-* after hwaccel, or NULL if hwaccel is the last one.
-*/
-AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
-/**
-* Lock operation used by lockmgr
-*/
-enum AVLockOp {
-AV_LOCK_CREATE,  ///< Create a mutex
-AV_LOCK_OBTAIN,  ///< Lock the mutex
-AV_LOCK_RELEASE, ///< Unlock the mutex
-AV_LOCK_DESTROY, ///< Free mutex resources
-};
-/**
-* Register a user provided lock manager supporting the operations
-* specified by AVLockOp. mutex points to a (void *) where the
-* lockmgr should store/get a pointer to a user allocated mutex. It's
-* NULL upon AV_LOCK_CREATE and != NULL for all other ops.
-*
-* @param cb User defined callback. Note: Libav may invoke calls to this
-*           callback during the call to av_lockmgr_register().
-*           Thus, the application must be prepared to handle that.
-*           If cb is set to NULL the lockmgr will be unregistered.
-*           Also note that during unregistration the previously registered
-*           lockmgr callback may also be invoked.
-*/
-int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
-/**
-* Get the type of the given codec.
-*/
-enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
-/**
-* @return a positive value if s is open (i.e. avcodec_open2() was called on it
-* with no corresponding avcodec_close()), 0 otherwise.
-*/
-int avcodec_is_open(AVCodecContext *s);
-/**
-* @return a non-zero number if codec is an encoder, zero otherwise
-*/
-int av_codec_is_encoder(const AVCodec *codec);
-/**
-* @return a non-zero number if codec is a decoder, zero otherwise
-*/
-int av_codec_is_decoder(const AVCodec *codec);
-/**
-* @return descriptor for given codec ID or NULL if no descriptor exists.
-*/
-const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
-/**
-* Iterate over all codec descriptors known to libavcodec.
-*
-* @param prev previous descriptor. NULL to get the first descriptor.
-*
-* @return next descriptor or NULL after the last descriptor
-*/
-const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
-/**
-* @return codec descriptor with the given name or NULL if no such descriptor
-*         exists.
-*/
-const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
-/**
-* @}
-*/
-#endif /* AVCODEC_AVCODEC_H */

changeset 15388	262003f2e19a
parent 15387	90a79670de52
child 15389	7718bdf60d45