1408352ada
applied by the audio decoder, and use that option in the AC3 decoder. Originally committed as revision 11280 to svn://svn.ffmpeg.org/ffmpeg/trunk
2972 lines
91 KiB
C
2972 lines
91 KiB
C
/*
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* copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef FFMPEG_AVCODEC_H
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#define FFMPEG_AVCODEC_H
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/**
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* @file avcodec.h
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* external API header
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*/
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#include "avutil.h"
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#include <sys/types.h> /* size_t */
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#define AV_STRINGIFY(s) AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBAVCODEC_VERSION_INT ((51<<16)+(49<<8)+0)
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#define LIBAVCODEC_VERSION 51.49.0
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#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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#define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
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#define AV_TIME_BASE 1000000
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#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
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/**
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* Identifies the syntax and semantics of the bitstream.
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* The principle is roughly:
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* Two decoders with the same ID can decode the same streams.
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* Two encoders with the same ID can encode compatible streams.
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* There may be slight deviations from the principle due to implementation
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* details.
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*
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* If you add a codec ID to this list, add it so that
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* 1. no value of a existing codec ID changes (that would break ABI),
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* 2. it is as close as possible to similar codecs.
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*/
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enum CodecID {
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CODEC_ID_NONE,
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CODEC_ID_MPEG1VIDEO,
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CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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CODEC_ID_MPEG2VIDEO_XVMC,
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CODEC_ID_H261,
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CODEC_ID_H263,
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CODEC_ID_RV10,
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CODEC_ID_RV20,
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CODEC_ID_MJPEG,
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CODEC_ID_MJPEGB,
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CODEC_ID_LJPEG,
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CODEC_ID_SP5X,
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CODEC_ID_JPEGLS,
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CODEC_ID_MPEG4,
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CODEC_ID_RAWVIDEO,
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CODEC_ID_MSMPEG4V1,
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CODEC_ID_MSMPEG4V2,
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CODEC_ID_MSMPEG4V3,
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CODEC_ID_WMV1,
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CODEC_ID_WMV2,
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CODEC_ID_H263P,
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CODEC_ID_H263I,
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CODEC_ID_FLV1,
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CODEC_ID_SVQ1,
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CODEC_ID_SVQ3,
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CODEC_ID_DVVIDEO,
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CODEC_ID_HUFFYUV,
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CODEC_ID_CYUV,
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CODEC_ID_H264,
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CODEC_ID_INDEO3,
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CODEC_ID_VP3,
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CODEC_ID_THEORA,
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CODEC_ID_ASV1,
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CODEC_ID_ASV2,
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CODEC_ID_FFV1,
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CODEC_ID_4XM,
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CODEC_ID_VCR1,
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CODEC_ID_CLJR,
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CODEC_ID_MDEC,
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CODEC_ID_ROQ,
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CODEC_ID_INTERPLAY_VIDEO,
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CODEC_ID_XAN_WC3,
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CODEC_ID_XAN_WC4,
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CODEC_ID_RPZA,
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CODEC_ID_CINEPAK,
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CODEC_ID_WS_VQA,
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CODEC_ID_MSRLE,
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CODEC_ID_MSVIDEO1,
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CODEC_ID_IDCIN,
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CODEC_ID_8BPS,
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CODEC_ID_SMC,
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CODEC_ID_FLIC,
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CODEC_ID_TRUEMOTION1,
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CODEC_ID_VMDVIDEO,
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CODEC_ID_MSZH,
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CODEC_ID_ZLIB,
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CODEC_ID_QTRLE,
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CODEC_ID_SNOW,
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CODEC_ID_TSCC,
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CODEC_ID_ULTI,
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CODEC_ID_QDRAW,
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CODEC_ID_VIXL,
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CODEC_ID_QPEG,
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CODEC_ID_XVID,
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CODEC_ID_PNG,
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CODEC_ID_PPM,
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CODEC_ID_PBM,
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CODEC_ID_PGM,
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CODEC_ID_PGMYUV,
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CODEC_ID_PAM,
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CODEC_ID_FFVHUFF,
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CODEC_ID_RV30,
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CODEC_ID_RV40,
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CODEC_ID_VC1,
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CODEC_ID_WMV3,
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CODEC_ID_LOCO,
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CODEC_ID_WNV1,
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CODEC_ID_AASC,
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CODEC_ID_INDEO2,
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CODEC_ID_FRAPS,
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CODEC_ID_TRUEMOTION2,
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CODEC_ID_BMP,
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CODEC_ID_CSCD,
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CODEC_ID_MMVIDEO,
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CODEC_ID_ZMBV,
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CODEC_ID_AVS,
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CODEC_ID_SMACKVIDEO,
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CODEC_ID_NUV,
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CODEC_ID_KMVC,
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CODEC_ID_FLASHSV,
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CODEC_ID_CAVS,
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CODEC_ID_JPEG2000,
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CODEC_ID_VMNC,
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CODEC_ID_VP5,
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CODEC_ID_VP6,
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CODEC_ID_VP6F,
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CODEC_ID_TARGA,
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CODEC_ID_DSICINVIDEO,
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CODEC_ID_TIERTEXSEQVIDEO,
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CODEC_ID_TIFF,
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CODEC_ID_GIF,
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CODEC_ID_FFH264,
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CODEC_ID_DXA,
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CODEC_ID_DNXHD,
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CODEC_ID_THP,
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CODEC_ID_SGI,
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CODEC_ID_C93,
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CODEC_ID_BETHSOFTVID,
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CODEC_ID_PTX,
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CODEC_ID_TXD,
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CODEC_ID_VP6A,
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CODEC_ID_AMV,
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CODEC_ID_VB,
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/* various PCM "codecs" */
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CODEC_ID_PCM_S16LE= 0x10000,
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CODEC_ID_PCM_S16BE,
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CODEC_ID_PCM_U16LE,
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CODEC_ID_PCM_U16BE,
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CODEC_ID_PCM_S8,
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CODEC_ID_PCM_U8,
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CODEC_ID_PCM_MULAW,
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CODEC_ID_PCM_ALAW,
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CODEC_ID_PCM_S32LE,
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CODEC_ID_PCM_S32BE,
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CODEC_ID_PCM_U32LE,
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CODEC_ID_PCM_U32BE,
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CODEC_ID_PCM_S24LE,
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CODEC_ID_PCM_S24BE,
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CODEC_ID_PCM_U24LE,
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CODEC_ID_PCM_U24BE,
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CODEC_ID_PCM_S24DAUD,
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CODEC_ID_PCM_ZORK,
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CODEC_ID_PCM_S16LE_PLANAR,
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/* various ADPCM codecs */
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CODEC_ID_ADPCM_IMA_QT= 0x11000,
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CODEC_ID_ADPCM_IMA_WAV,
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CODEC_ID_ADPCM_IMA_DK3,
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CODEC_ID_ADPCM_IMA_DK4,
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CODEC_ID_ADPCM_IMA_WS,
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CODEC_ID_ADPCM_IMA_SMJPEG,
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CODEC_ID_ADPCM_MS,
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CODEC_ID_ADPCM_4XM,
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CODEC_ID_ADPCM_XA,
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CODEC_ID_ADPCM_ADX,
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CODEC_ID_ADPCM_EA,
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CODEC_ID_ADPCM_G726,
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CODEC_ID_ADPCM_CT,
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CODEC_ID_ADPCM_SWF,
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CODEC_ID_ADPCM_YAMAHA,
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CODEC_ID_ADPCM_SBPRO_4,
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CODEC_ID_ADPCM_SBPRO_3,
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CODEC_ID_ADPCM_SBPRO_2,
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CODEC_ID_ADPCM_THP,
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CODEC_ID_ADPCM_IMA_AMV,
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CODEC_ID_ADPCM_EA_R1,
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CODEC_ID_ADPCM_EA_R3,
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CODEC_ID_ADPCM_EA_R2,
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CODEC_ID_ADPCM_IMA_EA_SEAD,
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CODEC_ID_ADPCM_IMA_EA_EACS,
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CODEC_ID_ADPCM_EA_XAS,
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/* AMR */
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CODEC_ID_AMR_NB= 0x12000,
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CODEC_ID_AMR_WB,
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/* RealAudio codecs*/
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CODEC_ID_RA_144= 0x13000,
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CODEC_ID_RA_288,
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/* various DPCM codecs */
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CODEC_ID_ROQ_DPCM= 0x14000,
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CODEC_ID_INTERPLAY_DPCM,
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CODEC_ID_XAN_DPCM,
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CODEC_ID_SOL_DPCM,
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CODEC_ID_MP2= 0x15000,
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CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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CODEC_ID_AAC,
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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CODEC_ID_MPEG4AAC,
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#endif
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CODEC_ID_AC3,
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CODEC_ID_DTS,
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CODEC_ID_VORBIS,
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CODEC_ID_DVAUDIO,
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CODEC_ID_WMAV1,
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CODEC_ID_WMAV2,
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CODEC_ID_MACE3,
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CODEC_ID_MACE6,
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CODEC_ID_VMDAUDIO,
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CODEC_ID_SONIC,
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CODEC_ID_SONIC_LS,
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CODEC_ID_FLAC,
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CODEC_ID_MP3ADU,
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CODEC_ID_MP3ON4,
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CODEC_ID_SHORTEN,
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CODEC_ID_ALAC,
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CODEC_ID_WESTWOOD_SND1,
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CODEC_ID_GSM, ///< as in Berlin toast format
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CODEC_ID_QDM2,
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CODEC_ID_COOK,
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CODEC_ID_TRUESPEECH,
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CODEC_ID_TTA,
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CODEC_ID_SMACKAUDIO,
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CODEC_ID_QCELP,
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CODEC_ID_WAVPACK,
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CODEC_ID_DSICINAUDIO,
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CODEC_ID_IMC,
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CODEC_ID_MUSEPACK7,
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CODEC_ID_MLP,
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CODEC_ID_GSM_MS, /* as found in WAV */
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CODEC_ID_ATRAC3,
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CODEC_ID_VOXWARE,
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CODEC_ID_APE,
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CODEC_ID_NELLYMOSER,
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CODEC_ID_MUSEPACK8,
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/* subtitle codecs */
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CODEC_ID_DVD_SUBTITLE= 0x17000,
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CODEC_ID_DVB_SUBTITLE,
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CODEC_ID_TEXT, ///< raw UTF-8 text
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CODEC_ID_XSUB,
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CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
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* stream (only used by libavformat) */
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};
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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/* CODEC_ID_MP3LAME is obsolete */
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#define CODEC_ID_MP3LAME CODEC_ID_MP3
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
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#endif
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enum CodecType {
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CODEC_TYPE_UNKNOWN = -1,
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CODEC_TYPE_VIDEO,
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CODEC_TYPE_AUDIO,
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CODEC_TYPE_DATA,
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CODEC_TYPE_SUBTITLE,
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CODEC_TYPE_NB
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};
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/**
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* Currently unused, may be used if 24/32 bits samples are ever supported.
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* all in native-endian format
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*/
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enum SampleFormat {
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SAMPLE_FMT_NONE = -1,
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SAMPLE_FMT_U8, ///< unsigned 8 bits
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SAMPLE_FMT_S16, ///< signed 16 bits
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SAMPLE_FMT_S24, ///< signed 24 bits
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SAMPLE_FMT_S32, ///< signed 32 bits
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SAMPLE_FMT_FLT, ///< float
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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/**
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* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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* This is mainly needed because some optimized bitstream readers read
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* 32 or 64 bit at once and could read over the end.<br>
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* Note: If the first 23 bits of the additional bytes are not 0, then damaged
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* MPEG bitstreams could cause overread and segfault.
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*/
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/**
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* minimum encoding buffer size
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* Used to avoid some checks during header writing.
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*/
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#define FF_MIN_BUFFER_SIZE 16384
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/**
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* motion estimation type.
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*/
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enum Motion_Est_ID {
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ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
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ME_FULL,
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ME_LOG,
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ME_PHODS,
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ME_EPZS, ///< enhanced predictive zonal search
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ME_X1, ///< reserved for experiments
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ME_HEX, ///< hexagon based search
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ME_UMH, ///< uneven multi-hexagon search
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ME_ITER, ///< iterative search
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};
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enum AVDiscard{
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/* We leave some space between them for extensions (drop some
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* keyframes for intra-only or drop just some bidir frames). */
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AVDISCARD_NONE =-16, ///< discard nothing
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AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
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AVDISCARD_NONREF = 8, ///< discard all non reference
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AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
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AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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AVDISCARD_ALL = 48, ///< discard all
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};
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typedef struct RcOverride{
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int start_frame;
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int end_frame;
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int qscale; // If this is 0 then quality_factor will be used instead.
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float quality_factor;
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} RcOverride;
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#define FF_MAX_B_FRAMES 16
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/* encoding support
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These flags can be passed in AVCodecContext.flags before initialization.
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Note: Not everything is supported yet.
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*/
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#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
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#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
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#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
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#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
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#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
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#define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
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/**
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* The parent program guarantees that the input for B-frames containing
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* streams is not written to for at least s->max_b_frames+1 frames, if
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* this is not set the input will be copied.
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*/
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
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#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
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#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
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#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
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#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
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#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
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#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
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location instead of only at frame boundaries. */
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#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
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#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
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#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
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#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< Use trellis quantization.
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#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
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#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
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/* Fx : Flag for h263+ extra options */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
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#endif
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#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
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#define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
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#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
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#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
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#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
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#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
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#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
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#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
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#define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
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#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
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#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
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#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
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#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
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#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
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#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
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#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
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#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
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#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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#define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
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#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
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#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
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#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
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#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
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#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
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#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
|
|
|
|
/* 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.
|
|
* direct rendering method 1
|
|
*/
|
|
#define CODEC_CAP_DR1 0x0002
|
|
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
|
|
#define CODEC_CAP_PARSE_ONLY 0x0004
|
|
#define CODEC_CAP_TRUNCATED 0x0008
|
|
/* Codec can export data for HW decoding (XvMC). */
|
|
#define CODEC_CAP_HWACCEL 0x0010
|
|
/**
|
|
* Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
|
|
* If this is not set, the codec is guaranteed to never be fed with NULL data.
|
|
*/
|
|
#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
|
|
|
|
//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_COMMON_FRAME \
|
|
/**\
|
|
* pointer to the picture planes.\
|
|
* This might be different from the first allocated byte\
|
|
* - encoding: \
|
|
* - decoding: \
|
|
*/\
|
|
uint8_t *data[4];\
|
|
int linesize[4];\
|
|
/**\
|
|
* 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[4];\
|
|
/**\
|
|
* 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.\
|
|
*/\
|
|
int pict_type;\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* 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; \
|
|
\
|
|
/**\
|
|
* buffer age (1->was last buffer and dint change, 2->..., ...).\
|
|
* Set to INT_MAX if the buffer has not been used yet.\
|
|
* - encoding: unused\
|
|
* - decoding: MUST be set by get_buffer().\
|
|
*/\
|
|
int age;\
|
|
\
|
|
/**\
|
|
* is this picture used as reference\
|
|
* - 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;\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* 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[4];\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* \
|
|
*/\
|
|
int qscale_type;\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* Pan scan.\
|
|
* - encoding: Set by user.\
|
|
* - decoding: Set by libavcodec.\
|
|
*/\
|
|
AVPanScan *pan_scan;\
|
|
\
|
|
/**\
|
|
* 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;\
|
|
\
|
|
/**\
|
|
* DCT coefficients\
|
|
* - encoding: unused\
|
|
* - decoding: Set by libavcodec.\
|
|
*/\
|
|
short *dct_coeff;\
|
|
\
|
|
/**\
|
|
* motion referece frame index\
|
|
* - encoding: Set by user.\
|
|
* - decoding: Set by libavcodec.\
|
|
*/\
|
|
int8_t *ref_index[2];
|
|
|
|
#define FF_QSCALE_TYPE_MPEG1 0
|
|
#define FF_QSCALE_TYPE_MPEG2 1
|
|
#define FF_QSCALE_TYPE_H264 2
|
|
|
|
#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_I_TYPE 1 // Intra
|
|
#define FF_P_TYPE 2 // Predicted
|
|
#define FF_B_TYPE 3 // Bi-dir predicted
|
|
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
|
|
#define FF_SI_TYPE 5
|
|
#define FF_SP_TYPE 6
|
|
|
|
#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).
|
|
|
|
/**
|
|
* Audio Video Frame.
|
|
*/
|
|
typedef struct AVFrame {
|
|
FF_COMMON_FRAME
|
|
} AVFrame;
|
|
|
|
#define DEFAULT_FRAME_RATE_BASE 1001000
|
|
|
|
/**
|
|
* main external API structure
|
|
*/
|
|
typedef struct AVCodecContext {
|
|
/**
|
|
* information on struct for av_log
|
|
* - set by avcodec_alloc_context
|
|
*/
|
|
AVClass *av_class;
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* CODEC_FLAG_*.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int flags;
|
|
|
|
/**
|
|
* Some codecs need additional format info. It is stored here.
|
|
* If any muxer uses this then ALL demuxers/parsers AND encoders for the
|
|
* specific codec MUST set it correctly otherwise stream copy breaks.
|
|
* In general use of this field by muxers is not recommanded.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec. (FIXME: Is this OK?)
|
|
*/
|
|
int sub_id;
|
|
|
|
/**
|
|
* 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) [7, 8 are x264 specific, 9 is snow specific]
|
|
* - encoding: MUST be set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_method;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* 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;
|
|
|
|
#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 PIX_FMT_xxx.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
enum PixelFormat pix_fmt;
|
|
|
|
/**
|
|
* Frame rate emulation. If not zero, the lower layer (i.e. format handler)
|
|
* has to read frames at native frame rate.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rate_emu;
|
|
|
|
/**
|
|
* 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.
|
|
* - 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[4],
|
|
int y, int type, int height);
|
|
|
|
/* audio only */
|
|
int sample_rate; ///< samples per second
|
|
int channels;
|
|
|
|
/**
|
|
* audio sample format
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
enum SampleFormat sample_fmt; ///< sample format, currently unused
|
|
|
|
/* The following data should not be initialized. */
|
|
/**
|
|
* Samples per packet, initialized when calling 'init'.
|
|
*/
|
|
int frame_size;
|
|
int frame_number; ///< audio or video frame number
|
|
int real_pict_num; ///< Returns the real picture number of previous encoded frame.
|
|
|
|
/**
|
|
* Number of frames the decoded output will be delayed relative to
|
|
* the encoded input.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: unused
|
|
*/
|
|
int delay;
|
|
|
|
/* - 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;
|
|
|
|
/**
|
|
* 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
|
|
* - 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;
|
|
|
|
/**
|
|
* hurry up amount
|
|
* - encoding: unused
|
|
* - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
|
|
* @deprecated Deprecated in favor of skip_idct and skip_frame.
|
|
*/
|
|
int hurry_up;
|
|
|
|
struct AVCodec *codec;
|
|
|
|
void *priv_data;
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
/* unused, FIXME remove*/
|
|
int rtp_mode;
|
|
#endif
|
|
|
|
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. */
|
|
|
|
|
|
/* 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);
|
|
|
|
/* 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;
|
|
|
|
/**
|
|
* Private data of the user, can be used to carry app specific stuff.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
void *opaque;
|
|
|
|
char codec_name[32];
|
|
enum CodecType codec_type; /* see CODEC_TYPE_xxx */
|
|
enum CodecID codec_id; /* see 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 then 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;
|
|
|
|
/**
|
|
* 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_FAKE_SCALABILITY 16 //Autodetection should work 100%.
|
|
|
|
/**
|
|
* luma single coefficient elimination threshold
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int luma_elim_threshold;
|
|
|
|
/**
|
|
* chroma single coeff elimination threshold
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int chroma_elim_threshold;
|
|
|
|
/**
|
|
* strictly follow the standard (MPEG4, ...).
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int strict_std_compliance;
|
|
#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a 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_INOFFICIAL -1 ///< Allow inofficial extensions.
|
|
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
|
|
|
|
/**
|
|
* qscale offset 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_offset;
|
|
|
|
/**
|
|
* Error resilience; higher values will detect more errors but may
|
|
* misdetect some more or less valid parts as errors.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int error_resilience;
|
|
#define FF_ER_CAREFUL 1
|
|
#define FF_ER_COMPLIANT 2
|
|
#define FF_ER_AGGRESSIVE 3
|
|
#define FF_ER_VERY_AGGRESSIVE 4
|
|
|
|
/**
|
|
* Called at the beginning of each frame to get a buffer for it.
|
|
* If pic.reference is set then the frame will be read later by libavcodec.
|
|
* avcodec_align_dimensions() should be used to find the required width and
|
|
* height, as they normally need to be rounded up to the next multiple of 16.
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec., user can override.
|
|
*/
|
|
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
|
/**
|
|
* Called to release buffers which where allocated with get_buffer.
|
|
* A released buffer can be reused in get_buffer().
|
|
* pic.data[*] must be set to NULL.
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec., user can override.
|
|
*/
|
|
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
|
/**
|
|
* If 1 the stream has a 1 frame delay during decoding.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int has_b_frames;
|
|
|
|
/**
|
|
* number of bytes per packet if constant and known or 0
|
|
* Used by some WAV based audio codecs.
|
|
*/
|
|
int block_align;
|
|
|
|
int parse_only; /* - decoding only: If true, only parsing is done
|
|
(function avcodec_parse_frame()). The frame
|
|
data is returned. Only MPEG codecs support this now. */
|
|
|
|
/**
|
|
* 0-> h263 quant 1-> mpeg quant
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mpeg_quant;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* ratecontrol override, see RcOverride
|
|
* - encoding: Allocated/set/freed by user.
|
|
* - decoding: unused
|
|
*/
|
|
RcOverride *rc_override;
|
|
int rc_override_count;
|
|
|
|
/**
|
|
* rate control equation
|
|
* - encoding: Set by user
|
|
* - decoding: unused
|
|
*/
|
|
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;
|
|
|
|
/**
|
|
* decoder bitstream buffer size
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_buffer_size;
|
|
float rc_buffer_aggressivity;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* initial complexity for pass1 ratecontrol
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float rc_initial_cplx;
|
|
|
|
/**
|
|
* 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_MLIB 4
|
|
#define FF_DCT_ALTIVEC 5
|
|
#define FF_DCT_FAAN 6
|
|
|
|
/**
|
|
* 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;
|
|
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
/* for binary compatibility */
|
|
int unused;
|
|
#endif
|
|
|
|
/**
|
|
* 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
|
|
#define FF_IDCT_LIBMPEG2MMX 4
|
|
#define FF_IDCT_PS2 5
|
|
#define FF_IDCT_MLIB 6
|
|
#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
|
|
|
|
/**
|
|
* slice count
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by user (or 0).
|
|
*/
|
|
int slice_count;
|
|
/**
|
|
* slice offsets in the frame in bytes
|
|
* - encoding: Set/allocated by libavcodec.
|
|
* - decoding: Set/allocated by user (or NULL).
|
|
*/
|
|
int *slice_offset;
|
|
|
|
/**
|
|
* error concealment flags
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int error_concealment;
|
|
#define FF_EC_GUESS_MVS 1
|
|
#define FF_EC_DEBLOCK 2
|
|
|
|
/**
|
|
* dsp_mask could be add used to disable unwanted CPU features
|
|
* CPU features (i.e. MMX, SSE. ...)
|
|
*
|
|
* With the FORCE flag you may instead enable given CPU features.
|
|
* (Dangerous: Usable in case of misdetection, improper usage however will
|
|
* result into program crash.)
|
|
*/
|
|
unsigned dsp_mask;
|
|
#define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
|
|
/* lower 16 bits - CPU features */
|
|
#define FF_MM_MMX 0x0001 ///< standard MMX
|
|
#define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
|
|
#define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
|
|
#define FF_MM_SSE 0x0008 ///< SSE functions
|
|
#define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
|
|
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
|
|
#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
|
|
#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
|
|
#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
|
|
|
|
/**
|
|
* bits per sample/pixel from the demuxer (needed for huffyuv).
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int bits_per_sample;
|
|
|
|
/**
|
|
* 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
|
|
|
|
/**
|
|
* sample aspect ratio (0 if unknown)
|
|
* 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;
|
|
|
|
/**
|
|
* the picture in the bitstream
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
AVFrame *coded_frame;
|
|
|
|
/**
|
|
* 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
|
|
|
|
/**
|
|
* 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
|
|
* - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
|
|
* - decoding: unused
|
|
*/
|
|
uint64_t error[4];
|
|
|
|
/**
|
|
* minimum MB quantizer
|
|
* - encoding: unused
|
|
* - decoding: unused
|
|
*/
|
|
int mb_qmin;
|
|
|
|
/**
|
|
* maximum MB quantizer
|
|
* - encoding: unused
|
|
* - decoding: unused
|
|
*/
|
|
int mb_qmax;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* 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 PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* color table ID
|
|
* - encoding: unused
|
|
* - decoding: Which clrtable should be used for 8bit RGB images.
|
|
* Tables have to be stored somewhere. FIXME
|
|
*/
|
|
int color_table_id;
|
|
|
|
/**
|
|
* internal_buffer count
|
|
* Don't touch, used by libavcodec default_get_buffer().
|
|
*/
|
|
int internal_buffer_count;
|
|
|
|
/**
|
|
* internal_buffers
|
|
* Don't touch, used by libavcodec default_get_buffer().
|
|
*/
|
|
void *internal_buffer;
|
|
|
|
#define FF_LAMBDA_SHIFT 7
|
|
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
|
|
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
|
|
#define FF_LAMBDA_MAX (256*128-1)
|
|
|
|
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
|
|
/**
|
|
* 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;
|
|
|
|
#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;
|
|
#if 0
|
|
/**
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
|
|
#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 distoration
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* scene change detection threshold
|
|
* 0 is default, larger means fewer detected scene changes.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int scenechange_threshold;
|
|
|
|
/**
|
|
* minimum Lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int lmin;
|
|
|
|
/**
|
|
* maximum Lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int lmax;
|
|
|
|
/**
|
|
* palette control structure
|
|
* - encoding: ??? (no palette-enabled encoder yet)
|
|
* - decoding: Set by user.
|
|
*/
|
|
struct AVPaletteControl *palctrl;
|
|
|
|
/**
|
|
* noise reduction strength
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int noise_reduction;
|
|
|
|
/**
|
|
* 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().
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec., user can override
|
|
*/
|
|
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int inter_threshold;
|
|
|
|
/**
|
|
* CODEC_FLAG2_*
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int flags2;
|
|
|
|
/**
|
|
* Simulates errors in the bitstream to test error concealment.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int error_rate;
|
|
|
|
/**
|
|
* MP3 antialias algorithm, see FF_AA_* below.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int antialias_algo;
|
|
#define FF_AA_AUTO 0
|
|
#define FF_AA_FASTINT 1 //not implemented yet
|
|
#define FF_AA_INT 2
|
|
#define FF_AA_FLOAT 3
|
|
/**
|
|
* quantizer noise shaping
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int quantizer_noise_shaping;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/**
|
|
* thread opaque
|
|
* Can be used by execute() to store some per AVCodecContext stuff.
|
|
* - encoding: set by execute()
|
|
* - decoding: set by execute()
|
|
*/
|
|
void *thread_opaque;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* noise vs. sse weight for the nsse comparsion function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int nsse_weight;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* profile
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int profile;
|
|
#define FF_PROFILE_UNKNOWN -99
|
|
#define FF_PROFILE_AAC_MAIN 0
|
|
#define FF_PROFILE_AAC_LOW 1
|
|
#define FF_PROFILE_AAC_SSR 2
|
|
#define FF_PROFILE_AAC_LTP 3
|
|
|
|
/**
|
|
* level
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int level;
|
|
#define FF_LEVEL_UNKNOWN -99
|
|
|
|
/**
|
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int lowres;
|
|
|
|
/**
|
|
* Bitstream width / height, may be different from width/height if lowres
|
|
* or other things are used.
|
|
* - encoding: unused
|
|
* - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
|
|
*/
|
|
int coded_width, coded_height;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* 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: 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;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int bidir_refine;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int brd_scale;
|
|
|
|
/**
|
|
* constant rate factor - quality-based VBR - values ~correspond to qps
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float crf;
|
|
|
|
/**
|
|
* constant quantization parameter rate control method
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int cqp;
|
|
|
|
/**
|
|
* minimum GOP size
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int keyint_min;
|
|
|
|
/**
|
|
* number of reference frames
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int refs;
|
|
|
|
/**
|
|
* chroma qp offset from luma
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int chromaoffset;
|
|
|
|
/**
|
|
* Influences how often B-frames are used.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int bframebias;
|
|
|
|
/**
|
|
* trellis RD quantization
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int trellis;
|
|
|
|
/**
|
|
* Reduce fluctuations in qp (before curve compression).
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float complexityblur;
|
|
|
|
/**
|
|
* in-loop deblocking filter alphac0 parameter
|
|
* alpha is in the range -6...6
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int deblockalpha;
|
|
|
|
/**
|
|
* in-loop deblocking filter beta parameter
|
|
* beta is in the range -6...6
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int deblockbeta;
|
|
|
|
/**
|
|
* macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int partitions;
|
|
#define X264_PART_I4X4 0x001 /* Analyze i4x4 */
|
|
#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
|
|
#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
|
|
#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
|
|
#define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
|
|
|
|
/**
|
|
* direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int directpred;
|
|
|
|
/**
|
|
* Audio cutoff bandwidth (0 means "automatic"), currently used only by FAAC.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int cutoff;
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/**
|
|
* Adjusts sensitivity of b_frame_strategy 1.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int b_sensitivity;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int compression_level;
|
|
#define FF_COMPRESSION_DEFAULT -1
|
|
|
|
/**
|
|
* Sets whether to use LPC mode - used by FLAC encoder.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int use_lpc;
|
|
|
|
/**
|
|
* LPC coefficient precision - used by FLAC encoder
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int lpc_coeff_precision;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int min_prediction_order;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int max_prediction_order;
|
|
|
|
/**
|
|
* search method for selecting prediction order
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int prediction_order_method;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int min_partition_order;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int max_partition_order;
|
|
|
|
/**
|
|
* GOP timecode frame start number, in non drop frame format
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int64_t timecode_frame_start;
|
|
|
|
/**
|
|
* Decoder should decode to this many channels if it can (0 for default)
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int request_channels;
|
|
|
|
/**
|
|
* Percentage of dynamic range compression to be applied by the decoder.
|
|
* The default value is 1.0, corresponding to full compression.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
float drc_scale;
|
|
} AVCodecContext;
|
|
|
|
/**
|
|
* 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;
|
|
enum CodecType type;
|
|
enum CodecID id;
|
|
int priv_data_size;
|
|
int (*init)(AVCodecContext *);
|
|
int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
|
|
int (*close)(AVCodecContext *);
|
|
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
|
|
uint8_t *buf, int buf_size);
|
|
int capabilities;
|
|
struct AVCodec *next;
|
|
void (*flush)(AVCodecContext *);
|
|
const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
|
|
const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
|
|
} AVCodec;
|
|
|
|
/**
|
|
* four components are given, that's all.
|
|
* the last component is alpha
|
|
*/
|
|
typedef struct AVPicture {
|
|
uint8_t *data[4];
|
|
int linesize[4]; ///< number of bytes per line
|
|
} AVPicture;
|
|
|
|
/**
|
|
* AVPaletteControl
|
|
* This structure defines a method for communicating palette changes
|
|
* between and demuxer and a decoder.
|
|
*
|
|
* @deprecated Use AVPacket to send palette changes instead.
|
|
* This is totally broken.
|
|
*/
|
|
#define AVPALETTE_SIZE 1024
|
|
#define AVPALETTE_COUNT 256
|
|
typedef struct AVPaletteControl {
|
|
|
|
/* Demuxer sets this to 1 to indicate the palette has changed;
|
|
* decoder resets to 0. */
|
|
int palette_changed;
|
|
|
|
/* 4-byte ARGB palette entries, stored in native byte order; note that
|
|
* the individual palette components should be on a 8-bit scale; if
|
|
* the palette data comes from an IBM VGA native format, the component
|
|
* data is probably 6 bits in size and needs to be scaled. */
|
|
unsigned int palette[AVPALETTE_COUNT];
|
|
|
|
} AVPaletteControl attribute_deprecated;
|
|
|
|
typedef struct AVSubtitleRect {
|
|
uint16_t x;
|
|
uint16_t y;
|
|
uint16_t w;
|
|
uint16_t h;
|
|
uint16_t nb_colors;
|
|
int linesize;
|
|
uint32_t *rgba_palette;
|
|
uint8_t *bitmap;
|
|
} 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 */
|
|
uint32_t num_rects;
|
|
AVSubtitleRect *rects;
|
|
} AVSubtitle;
|
|
|
|
|
|
/* resample.c */
|
|
|
|
struct ReSampleContext;
|
|
struct AVResampleContext;
|
|
|
|
typedef struct ReSampleContext ReSampleContext;
|
|
|
|
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
|
|
int output_rate, int input_rate);
|
|
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
|
|
void audio_resample_close(ReSampleContext *s);
|
|
|
|
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
|
|
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
|
|
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
|
|
void av_resample_close(struct AVResampleContext *c);
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
/* YUV420 format is assumed ! */
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
|
|
int input_width, int input_height);
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
|
|
int iwidth, int iheight,
|
|
int topBand, int bottomBand,
|
|
int leftBand, int rightBand,
|
|
int padtop, int padbottom,
|
|
int padleft, int padright);
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
|
|
AVPicture *output, const AVPicture *input);
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
|
|
|
|
#endif
|
|
|
|
/**
|
|
* Allocate memory for a picture. Call avpicture_free to free it.
|
|
*
|
|
* @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, int pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* Free a picture previously allocated by avpicture_alloc().
|
|
*
|
|
* @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.
|
|
*
|
|
* @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,
|
|
int pix_fmt, int width, int height);
|
|
int avpicture_layout(const AVPicture* src, int 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.
|
|
*
|
|
* @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
|
|
*/
|
|
int avpicture_get_size(int pix_fmt, int width, int height);
|
|
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
|
|
const char *avcodec_get_pix_fmt_name(int pix_fmt);
|
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
|
|
enum PixelFormat avcodec_get_pix_fmt(const char* name);
|
|
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
|
|
|
|
#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) */
|
|
|
|
/**
|
|
* Computes 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(int dst_pix_fmt, int src_pix_fmt,
|
|
int has_alpha);
|
|
|
|
/**
|
|
* Finds 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
|
|
* \p pix_fmt_mask parameter.
|
|
*
|
|
* @code
|
|
* src_pix_fmt = PIX_FMT_YUV420P;
|
|
* pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << 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.
|
|
*/
|
|
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
|
|
int has_alpha, int *loss_ptr);
|
|
|
|
|
|
/**
|
|
* Print in buf the string corresponding to the pixel format with
|
|
* number pix_fmt, or an header if pix_fmt is negative.
|
|
*
|
|
* @param[in] buf the buffer where to write the string
|
|
* @param[in] buf_size the size of buf
|
|
* @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
|
|
* a negative value to print the corresponding header.
|
|
* Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
|
|
*/
|
|
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
|
|
|
|
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
|
|
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
|
|
|
|
/**
|
|
* Tell if an image really has transparent alpha values.
|
|
* @return ored mask of FF_ALPHA_xxx constants
|
|
*/
|
|
int img_get_alpha_info(const AVPicture *src,
|
|
int pix_fmt, int width, int height);
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
/**
|
|
* convert among pixel formats
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
|
|
const AVPicture *src, int pix_fmt,
|
|
int width, int height);
|
|
#endif
|
|
|
|
/* deinterlace a picture */
|
|
/* deinterlace - if not supported return -1 */
|
|
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
|
|
int pix_fmt, int width, int height);
|
|
|
|
/* external high level API */
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
extern AVCodec *first_avcodec;
|
|
#endif
|
|
AVCodec *av_codec_next(AVCodec *c);
|
|
|
|
/* returns LIBAVCODEC_VERSION_INT constant */
|
|
unsigned avcodec_version(void);
|
|
/* returns LIBAVCODEC_BUILD constant */
|
|
unsigned avcodec_build(void);
|
|
|
|
/**
|
|
* Initializes libavcodec.
|
|
*
|
|
* @warning This function \e must be called before any other libavcodec
|
|
* function.
|
|
*/
|
|
void avcodec_init(void);
|
|
|
|
void register_avcodec(AVCodec *format);
|
|
|
|
/**
|
|
* Finds a registered encoder with a matching codec ID.
|
|
*
|
|
* @param id CodecID of the requested encoder
|
|
* @return An encoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_encoder(enum CodecID id);
|
|
|
|
/**
|
|
* Finds 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);
|
|
|
|
/**
|
|
* Finds a registered decoder with a matching codec ID.
|
|
*
|
|
* @param id CodecID of the requested decoder
|
|
* @return A decoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_decoder(enum CodecID id);
|
|
|
|
/**
|
|
* Finds 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);
|
|
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
|
|
|
|
/**
|
|
* Sets the fields of the given AVCodecContext to default values.
|
|
*
|
|
* @param s The AVCodecContext of which the fields should be set to default values.
|
|
*/
|
|
void avcodec_get_context_defaults(AVCodecContext *s);
|
|
|
|
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
|
|
* we WILL change its arguments and name a few times! */
|
|
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
|
|
|
|
/**
|
|
* Allocates an AVCodecContext and sets its fields to default values. The
|
|
* resulting struct can be deallocated by simply calling av_free().
|
|
*
|
|
* @return An AVCodecContext filled with default values or NULL on failure.
|
|
* @see avcodec_get_context_defaults
|
|
*/
|
|
AVCodecContext *avcodec_alloc_context(void);
|
|
|
|
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
|
|
* we WILL change its arguments and name a few times! */
|
|
AVCodecContext *avcodec_alloc_context2(enum CodecType);
|
|
|
|
/**
|
|
* Sets the fields of the given AVFrame to default values.
|
|
*
|
|
* @param pic The AVFrame of which the fields should be set to default values.
|
|
*/
|
|
void avcodec_get_frame_defaults(AVFrame *pic);
|
|
|
|
/**
|
|
* Allocates an AVFrame and sets its fields to default values. The resulting
|
|
* struct can be deallocated by simply calling av_free().
|
|
*
|
|
* @return An AVFrame filled with default values or NULL on failure.
|
|
* @see avcodec_get_frame_defaults
|
|
*/
|
|
AVFrame *avcodec_alloc_frame(void);
|
|
|
|
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);
|
|
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
|
|
|
|
/**
|
|
* Checks if the given dimension of a picture is valid, meaning that all
|
|
* bytes of the picture can be addressed with a signed int.
|
|
*
|
|
* @param[in] w Width of the picture.
|
|
* @param[in] h Height of the picture.
|
|
* @return Zero if valid, a negative value if invalid.
|
|
*/
|
|
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
|
|
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
|
|
|
|
int avcodec_thread_init(AVCodecContext *s, int thread_count);
|
|
void avcodec_thread_free(AVCodecContext *s);
|
|
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
|
|
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
|
|
//FIXME func typedef
|
|
|
|
/**
|
|
* Initializes the AVCodecContext to use the given AVCodec. Prior to using this
|
|
* function the context has to be allocated.
|
|
*
|
|
* 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();
|
|
* codec = avcodec_find_decoder(CODEC_ID_H264);
|
|
* if (!codec)
|
|
* exit(1);
|
|
*
|
|
* context = avcodec_alloc_context();
|
|
*
|
|
* if (avcodec_open(context, codec) < 0)
|
|
* exit(1);
|
|
* @endcode
|
|
*
|
|
* @param avctx The context which will be set up to use the given codec.
|
|
* @param codec The codec to use within the context.
|
|
* @return zero on success, a negative value on error
|
|
* @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
|
|
*/
|
|
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
|
|
|
|
/**
|
|
* @deprecated Use avcodec_decode_audio2() instead.
|
|
*/
|
|
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
|
|
int *frame_size_ptr,
|
|
uint8_t *buf, int buf_size);
|
|
|
|
/**
|
|
* Decodes an audio frame from \p buf into \p samples.
|
|
* The avcodec_decode_audio2() function decodes an audio frame from the input
|
|
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
|
|
* audio codec which was coupled with \p avctx using avcodec_open(). The
|
|
* resulting decoded frame is stored in output buffer \p samples. If no frame
|
|
* could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
|
|
* decompressed frame size in \e bytes.
|
|
*
|
|
* @warning You \e must set \p frame_size_ptr to the allocated size of the
|
|
* output buffer before calling avcodec_decode_audio2().
|
|
*
|
|
* @warning The input buffer must be \c 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 \p 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 \p buf and output buffer \p
|
|
* 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, the
|
|
* bitstream should have 4 byte alignment at minimum and all sample data should
|
|
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
|
|
* the linesize is not a multiple of 16 then there's no sense in aligning the
|
|
* start of the buffer to 16.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param[out] samples the output buffer
|
|
* @param[in,out] frame_size_ptr the output buffer size in bytes
|
|
* @param[in] buf the input buffer
|
|
* @param[in] buf_size the input buffer size in bytes
|
|
* @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_audio2(AVCodecContext *avctx, int16_t *samples,
|
|
int *frame_size_ptr,
|
|
uint8_t *buf, int buf_size);
|
|
|
|
/**
|
|
* Decodes a video frame from \p buf into \p picture.
|
|
* The avcodec_decode_video() function decodes a video frame from the input
|
|
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
|
|
* video codec which was coupled with \p avctx using avcodec_open(). The
|
|
* resulting decoded frame is stored in \p picture.
|
|
*
|
|
* @warning The input buffer must be \c 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 \p 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 \p buf and output buffer \p
|
|
* 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, the
|
|
* bitstream should have 4 byte alignment at minimum and all sample data should
|
|
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
|
|
* the linesize is not a multiple of 16 then there's no sense in aligning the
|
|
* start of the buffer to 16.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
|
|
* @param[in] buf the input buffer
|
|
* @param[in] buf_size the size of the input buffer in bytes
|
|
* @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_video(AVCodecContext *avctx, AVFrame *picture,
|
|
int *got_picture_ptr,
|
|
uint8_t *buf, int buf_size);
|
|
|
|
/* Decode a subtitle message. Return -1 if 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. */
|
|
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
|
|
int *got_sub_ptr,
|
|
const uint8_t *buf, int buf_size);
|
|
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
|
|
int *data_size_ptr,
|
|
uint8_t *buf, int buf_size);
|
|
|
|
/**
|
|
* Encodes an audio frame from \p samples into \p buf.
|
|
* The avcodec_encode_audio() function encodes an audio frame from the input
|
|
* buffer \p samples. To encode it, it makes use of the audio codec which was
|
|
* coupled with \p avctx using avcodec_open(). The resulting encoded frame is
|
|
* stored in output buffer \p buf.
|
|
*
|
|
* @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
|
|
*
|
|
* @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 \p avctx.
|
|
* @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 avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
const short *samples);
|
|
|
|
/**
|
|
* Encodes a video frame from \p pict into \p buf.
|
|
* The avcodec_encode_video() function encodes a video frame from the input
|
|
* \p pict. To encode it, it makes use of the video codec which was coupled with
|
|
* \p avctx using avcodec_open(). The resulting encoded bytes representing the
|
|
* frame are stored in the output buffer \p buf. The input picture should be
|
|
* stored using a specific format, namely \c 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 input buffer.
|
|
*/
|
|
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
const AVFrame *pict);
|
|
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
const AVSubtitle *sub);
|
|
|
|
int avcodec_close(AVCodecContext *avctx);
|
|
|
|
void avcodec_register_all(void);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/* misc useful functions */
|
|
|
|
/**
|
|
* Returns a single letter to describe the given picture type \p pict_type.
|
|
*
|
|
* @param[in] pict_type the picture type
|
|
* @return A single character representing the picture type.
|
|
*/
|
|
char av_get_pict_type_char(int pict_type);
|
|
|
|
/**
|
|
* Returns 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 CodecID codec_id);
|
|
|
|
/**
|
|
* Returns sample format bits per sample.
|
|
*
|
|
* @param[in] sample_fmt the sample format
|
|
* @return Number of bits per sample or zero if unknown for the given sample format.
|
|
*/
|
|
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
|
|
|
|
/* 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 last_frame_offset; /* offset of the last frame */
|
|
/* video info */
|
|
int pict_type; /* XXX: Put it back in AVCodecContext. */
|
|
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
|
|
|
|
int64_t offset; ///< byte offset from starting packet start
|
|
int64_t last_offset;
|
|
} 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;
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
extern AVCodecParser *av_first_parser;
|
|
#endif
|
|
AVCodecParser *av_parser_next(AVCodecParser *c);
|
|
|
|
void av_register_codec_parser(AVCodecParser *parser);
|
|
AVCodecParserContext *av_parser_init(int codec_id);
|
|
int av_parser_parse(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size,
|
|
int64_t pts, int64_t dts);
|
|
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);
|
|
|
|
|
|
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 */
|
|
|
|
/**
|
|
* Reallocates the given block if it is not large enough, otherwise it
|
|
* does nothing.
|
|
*
|
|
* @see av_realloc
|
|
*/
|
|
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
|
|
|
|
/* for static data only */
|
|
|
|
/**
|
|
* Frees all static arrays and resets their pointers to 0.
|
|
* Call this function to release all statically allocated tables.
|
|
*
|
|
* @deprecated. Code which uses av_free_static is broken/misdesigned
|
|
* and should correctly use static arrays
|
|
*
|
|
*/
|
|
attribute_deprecated void av_free_static(void);
|
|
|
|
/**
|
|
* Allocation of static arrays.
|
|
*
|
|
* @warning Do not use for normal allocation.
|
|
*
|
|
* @param[in] size The amount of memory you need in bytes.
|
|
* @return block of memory of the requested size
|
|
* @deprecated. Code which uses av_mallocz_static is broken/misdesigned
|
|
* and should correctly use static arrays
|
|
*/
|
|
attribute_deprecated void *av_mallocz_static(unsigned int size);
|
|
|
|
/**
|
|
* Copy image 'src' to 'dst'.
|
|
*/
|
|
void av_picture_copy(AVPicture *dst, const AVPicture *src,
|
|
int pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* Crop image top and left side.
|
|
*/
|
|
int av_picture_crop(AVPicture *dst, const AVPicture *src,
|
|
int pix_fmt, int top_band, int left_band);
|
|
|
|
/**
|
|
* Pad image.
|
|
*/
|
|
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
|
|
int padtop, int padbottom, int padleft, int padright, int *color);
|
|
|
|
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
|
|
int pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
|
|
int pix_fmt, int top_band, int left_band);
|
|
|
|
/**
|
|
* @deprecated Use the software scaler (swscale) instead.
|
|
*/
|
|
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
|
|
int padtop, int padbottom, int padleft, int padright, int *color);
|
|
#endif
|
|
|
|
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
|
|
|
|
/**
|
|
* Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
|
|
*
|
|
* @return 0 in case of a successful parsing, a negative value otherwise
|
|
* @param[in] str the string to parse: it has to be a string in the format
|
|
* <width>x<height> or a valid video frame size abbreviation.
|
|
* @param[in,out] width_ptr pointer to the variable which will contain the detected
|
|
* frame width value
|
|
* @param[in,out] height_ptr pointer to the variable which will contain the detected
|
|
* frame height value
|
|
*/
|
|
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
|
|
|
|
/**
|
|
* Parses \p str and put in \p frame_rate the detected values.
|
|
*
|
|
* @return 0 in case of a successful parsing, a negative value otherwise
|
|
* @param[in] str the string to parse: it has to be a string in the format
|
|
* <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
|
|
* @param[in,out] frame_rate pointer to the AVRational which will contain the detected
|
|
* frame rate
|
|
*/
|
|
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
|
|
|
|
/* error handling */
|
|
#if EINVAL > 0
|
|
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
|
|
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
|
|
#else
|
|
/* Some platforms have E* and errno already negated. */
|
|
#define AVERROR(e) (e)
|
|
#define AVUNERROR(e) (e)
|
|
#endif
|
|
#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
|
|
#define AVERROR_IO AVERROR(EIO) /**< I/O error */
|
|
#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */
|
|
#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
|
|
#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
|
|
#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
|
|
#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */
|
|
#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */
|
|
#define AVERROR_PATCHWELCOME -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
|
|
|
|
#endif /* FFMPEG_AVCODEC_H */
|