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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of 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 AVCODEC_AVCODEC_H
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#define AVCODEC_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 "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 52
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#define LIBAVCODEC_VERSION_MINOR  9
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#define LIBAVCODEC_VERSION_MICRO  0
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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                                               LIBAVCODEC_VERSION_MINOR, \
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                                               LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
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                                           LIBAVCODEC_VERSION_MINOR,    \
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                                           LIBAVCODEC_VERSION_MICRO)
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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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    /* video codecs */
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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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    CODEC_ID_PCX,
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    CODEC_ID_SUNRAST,
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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    CODEC_ID_RL2,
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    CODEC_ID_8SVX_EXP,
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    CODEC_ID_8SVX_FIB,
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    CODEC_ID_ESCAPE124,
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    CODEC_ID_DIRAC,
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    CODEC_ID_BFI,
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    CODEC_ID_CMV,
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    CODEC_ID_MOTIONPIXELS,
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    CODEC_ID_TGV,
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    CODEC_ID_TGQ,
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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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    CODEC_ID_PCM_DVD,
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    CODEC_ID_PCM_F32BE,
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    CODEC_ID_PCM_F32LE,
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    CODEC_ID_PCM_F64BE,
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    CODEC_ID_PCM_F64LE,
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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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    CODEC_ID_ADPCM_EA_MAXIS_XA,
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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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    /* audio codecs */
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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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    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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    CODEC_ID_SPEEX,
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    CODEC_ID_WMAVOICE,
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    CODEC_ID_WMAPRO,
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    CODEC_ID_WMALOSSLESS,
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    CODEC_ID_ATRAC3P,
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    CODEC_ID_EAC3,
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    CODEC_ID_SIPR,
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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_SSA,
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    CODEC_ID_MOV_TEXT,
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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
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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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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_ATTACHMENT,
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    CODEC_TYPE_NB
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};
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/**
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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_S32,             ///< signed 32 bits
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    SAMPLE_FMT_FLT,             ///< float
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    SAMPLE_FMT_DBL,             ///< double
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    SAMPLE_FMT_NB               ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
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};
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/* Audio channel masks */
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#define CH_FRONT_LEFT             0x00000001
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#define CH_FRONT_RIGHT            0x00000002
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#define CH_FRONT_CENTER           0x00000004
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#define CH_LOW_FREQUENCY          0x00000008
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#define CH_BACK_LEFT              0x00000010
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#define CH_BACK_RIGHT             0x00000020
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#define CH_FRONT_LEFT_OF_CENTER   0x00000040
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#define CH_FRONT_RIGHT_OF_CENTER  0x00000080
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#define CH_BACK_CENTER            0x00000100
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#define CH_SIDE_LEFT              0x00000200
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#define CH_SIDE_RIGHT             0x00000400
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#define CH_TOP_CENTER             0x00000800
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#define CH_TOP_FRONT_LEFT         0x00001000
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#define CH_TOP_FRONT_CENTER       0x00002000
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#define CH_TOP_FRONT_RIGHT        0x00004000
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#define CH_TOP_BACK_LEFT          0x00008000
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#define CH_TOP_BACK_CENTER        0x00010000
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#define CH_TOP_BACK_RIGHT         0x00020000
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#define CH_STEREO_LEFT            0x20000000  ///< Stereo downmix.
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#define CH_STEREO_RIGHT           0x40000000  ///< See CH_STEREO_LEFT.
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/* Audio channel convenience macros */
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#define CH_LAYOUT_MONO              (CH_FRONT_CENTER)
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#define CH_LAYOUT_STEREO            (CH_FRONT_LEFT|CH_FRONT_RIGHT)
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#define CH_LAYOUT_SURROUND          (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
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#define CH_LAYOUT_QUAD              (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
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#define CH_LAYOUT_5POINT0           (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
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#define CH_LAYOUT_5POINT1           (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
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#define CH_LAYOUT_7POINT1           (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
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#define CH_LAYOUT_7POINT1_WIDE      (CH_LAYOUT_SURROUND|CH_LOW_FREQUENCY|\
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                                          CH_BACK_LEFT|CH_BACK_RIGHT|\
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                                          CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
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#define CH_LAYOUT_STEREO_DOWNMIX    (CH_STEREO_LEFT|CH_STEREO_RIGHT)
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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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    ME_TESA,        ///< transformed exhaustive search algorithm
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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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/**
451
 * 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.
454
 */
455
#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
463
                                                  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_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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#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     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.
487
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
488
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
489
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
490
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
491
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
492
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
493
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
494
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
495
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
496
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
497
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
498
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
499
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
500

    
501
/* Unsupported options :
502
 *              Syntax Arithmetic coding (SAC)
503
 *              Reference Picture Selection
504
 *              Independent Segment Decoding */
505
/* /Fx */
506
/* codec capabilities */
507

    
508
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
509
/**
510
 * Codec uses get_buffer() for allocating buffers.
511
 * direct rendering method 1
512
 */
513
#define CODEC_CAP_DR1             0x0002
514
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
515
#define CODEC_CAP_PARSE_ONLY      0x0004
516
#define CODEC_CAP_TRUNCATED       0x0008
517
/* Codec can export data for HW decoding (XvMC). */
518
#define CODEC_CAP_HWACCEL         0x0010
519
/**
520
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
521
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
522
 */
523
#define CODEC_CAP_DELAY           0x0020
524
/**
525
 * Codec can be fed a final frame with a smaller size.
526
 * This can be used to prevent truncation of the last audio samples.
527
 */
528
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
529

    
530
//The following defines may change, don't expect compatibility if you use them.
531
#define MB_TYPE_INTRA4x4   0x0001
532
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
533
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
534
#define MB_TYPE_16x16      0x0008
535
#define MB_TYPE_16x8       0x0010
536
#define MB_TYPE_8x16       0x0020
537
#define MB_TYPE_8x8        0x0040
538
#define MB_TYPE_INTERLACED 0x0080
539
#define MB_TYPE_DIRECT2    0x0100 //FIXME
540
#define MB_TYPE_ACPRED     0x0200
541
#define MB_TYPE_GMC        0x0400
542
#define MB_TYPE_SKIP       0x0800
543
#define MB_TYPE_P0L0       0x1000
544
#define MB_TYPE_P1L0       0x2000
545
#define MB_TYPE_P0L1       0x4000
546
#define MB_TYPE_P1L1       0x8000
547
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
548
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
549
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
550
#define MB_TYPE_QUANT      0x00010000
551
#define MB_TYPE_CBP        0x00020000
552
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
553

    
554
/**
555
 * Pan Scan area.
556
 * This specifies the area which should be displayed.
557
 * Note there may be multiple such areas for one frame.
558
 */
559
typedef struct AVPanScan{
560
    /**
561
     * id
562
     * - encoding: Set by user.
563
     * - decoding: Set by libavcodec.
564
     */
565
    int id;
566

    
567
    /**
568
     * width and height in 1/16 pel
569
     * - encoding: Set by user.
570
     * - decoding: Set by libavcodec.
571
     */
572
    int width;
573
    int height;
574

    
575
    /**
576
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
577
     * - encoding: Set by user.
578
     * - decoding: Set by libavcodec.
579
     */
580
    int16_t position[3][2];
581
}AVPanScan;
582

    
583
#define FF_COMMON_FRAME \
584
    /**\
585
     * pointer to the picture planes.\
586
     * This might be different from the first allocated byte\
587
     * - encoding: \
588
     * - decoding: \
589
     */\
590
    uint8_t *data[4];\
591
    int linesize[4];\
592
    /**\
593
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
594
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
595
     * - encoding: \
596
     * - decoding: \
597
     */\
598
    uint8_t *base[4];\
599
    /**\
600
     * 1 -> keyframe, 0-> not\
601
     * - encoding: Set by libavcodec.\
602
     * - decoding: Set by libavcodec.\
603
     */\
604
    int key_frame;\
605
\
606
    /**\
607
     * Picture type of the frame, see ?_TYPE below.\
608
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
609
     * - decoding: Set by libavcodec.\
610
     */\
611
    int pict_type;\
612
\
613
    /**\
614
     * presentation timestamp in time_base units (time when frame should be shown to user)\
615
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
616
     * - encoding: MUST be set by user.\
617
     * - decoding: Set by libavcodec.\
618
     */\
619
    int64_t pts;\
620
\
621
    /**\
622
     * picture number in bitstream order\
623
     * - encoding: set by\
624
     * - decoding: Set by libavcodec.\
625
     */\
626
    int coded_picture_number;\
627
    /**\
628
     * picture number in display order\
629
     * - encoding: set by\
630
     * - decoding: Set by libavcodec.\
631
     */\
632
    int display_picture_number;\
633
\
634
    /**\
635
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
636
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
637
     * - decoding: Set by libavcodec.\
638
     */\
639
    int quality; \
640
\
641
    /**\
642
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
643
     * Set to INT_MAX if the buffer has not been used yet.\
644
     * - encoding: unused\
645
     * - decoding: MUST be set by get_buffer().\
646
     */\
647
    int age;\
648
\
649
    /**\
650
     * is this picture used as reference\
651
     * The values for this are the same as the MpegEncContext.picture_structure\
652
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
653
     * - encoding: unused\
654
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
655
     */\
656
    int reference;\
657
\
658
    /**\
659
     * QP table\
660
     * - encoding: unused\
661
     * - decoding: Set by libavcodec.\
662
     */\
663
    int8_t *qscale_table;\
664
    /**\
665
     * QP store stride\
666
     * - encoding: unused\
667
     * - decoding: Set by libavcodec.\
668
     */\
669
    int qstride;\
670
\
671
    /**\
672
     * mbskip_table[mb]>=1 if MB didn't change\
673
     * stride= mb_width = (width+15)>>4\
674
     * - encoding: unused\
675
     * - decoding: Set by libavcodec.\
676
     */\
677
    uint8_t *mbskip_table;\
678
\
679
    /**\
680
     * motion vector table\
681
     * @code\
682
     * example:\
683
     * int mv_sample_log2= 4 - motion_subsample_log2;\
684
     * int mb_width= (width+15)>>4;\
685
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
686
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
687
     * @endcode\
688
     * - encoding: Set by user.\
689
     * - decoding: Set by libavcodec.\
690
     */\
691
    int16_t (*motion_val[2])[2];\
692
\
693
    /**\
694
     * macroblock type table\
695
     * mb_type_base + mb_width + 2\
696
     * - encoding: Set by user.\
697
     * - decoding: Set by libavcodec.\
698
     */\
699
    uint32_t *mb_type;\
700
\
701
    /**\
702
     * log2 of the size of the block which a single vector in motion_val represents: \
703
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
704
     * - encoding: unused\
705
     * - decoding: Set by libavcodec.\
706
     */\
707
    uint8_t motion_subsample_log2;\
708
\
709
    /**\
710
     * for some private data of the user\
711
     * - encoding: unused\
712
     * - decoding: Set by user.\
713
     */\
714
    void *opaque;\
715
\
716
    /**\
717
     * error\
718
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
719
     * - decoding: unused\
720
     */\
721
    uint64_t error[4];\
722
\
723
    /**\
724
     * type of the buffer (to keep track of who has to deallocate data[*])\
725
     * - encoding: Set by the one who allocates it.\
726
     * - decoding: Set by the one who allocates it.\
727
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
728
     */\
729
    int type;\
730
    \
731
    /**\
732
     * When decoding, this signals how much the picture must be delayed.\
733
     * extra_delay = repeat_pict / (2*fps)\
734
     * - encoding: unused\
735
     * - decoding: Set by libavcodec.\
736
     */\
737
    int repeat_pict;\
738
    \
739
    /**\
740
     * \
741
     */\
742
    int qscale_type;\
743
    \
744
    /**\
745
     * The content of the picture is interlaced.\
746
     * - encoding: Set by user.\
747
     * - decoding: Set by libavcodec. (default 0)\
748
     */\
749
    int interlaced_frame;\
750
    \
751
    /**\
752
     * If the content is interlaced, is top field displayed first.\
753
     * - encoding: Set by user.\
754
     * - decoding: Set by libavcodec.\
755
     */\
756
    int top_field_first;\
757
    \
758
    /**\
759
     * Pan scan.\
760
     * - encoding: Set by user.\
761
     * - decoding: Set by libavcodec.\
762
     */\
763
    AVPanScan *pan_scan;\
764
    \
765
    /**\
766
     * Tell user application that palette has changed from previous frame.\
767
     * - encoding: ??? (no palette-enabled encoder yet)\
768
     * - decoding: Set by libavcodec. (default 0).\
769
     */\
770
    int palette_has_changed;\
771
    \
772
    /**\
773
     * codec suggestion on buffer type if != 0\
774
     * - encoding: unused\
775
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
776
     */\
777
    int buffer_hints;\
778
\
779
    /**\
780
     * DCT coefficients\
781
     * - encoding: unused\
782
     * - decoding: Set by libavcodec.\
783
     */\
784
    short *dct_coeff;\
785
\
786
    /**\
787
     * motion referece frame index\
788
     * - encoding: Set by user.\
789
     * - decoding: Set by libavcodec.\
790
     */\
791
    int8_t *ref_index[2];\
792
\
793
    /**\
794
     * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
795
     * output in AVFrame.reordered_opaque\
796
     * - encoding: unused\
797
     * - decoding: Read by user.\
798
     */\
799
    int64_t reordered_opaque;\
800

    
801

    
802
#define FF_QSCALE_TYPE_MPEG1 0
803
#define FF_QSCALE_TYPE_MPEG2 1
804
#define FF_QSCALE_TYPE_H264  2
805

    
806
#define FF_BUFFER_TYPE_INTERNAL 1
807
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
808
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
809
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
810

    
811

    
812
#define FF_I_TYPE  1 ///< Intra
813
#define FF_P_TYPE  2 ///< Predicted
814
#define FF_B_TYPE  3 ///< Bi-dir predicted
815
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
816
#define FF_SI_TYPE 5 ///< Switching Intra
817
#define FF_SP_TYPE 6 ///< Switching Predicted
818
#define FF_BI_TYPE 7
819

    
820
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
821
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
822
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
823
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
824

    
825
/**
826
 * Audio Video Frame.
827
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
828
 * bumps.
829
 * Removal, reordering and changes to existing fields require a major
830
 * version bump. No fields should be added into AVFrame before or after
831
 * FF_COMMON_FRAME!
832
 * sizeof(AVFrame) must not be used outside libav*.
833
 */
834
typedef struct AVFrame {
835
    FF_COMMON_FRAME
836
} AVFrame;
837

    
838
/**
839
 * main external API structure.
840
 * New fields can be added to the end with minor version bumps.
841
 * Removal, reordering and changes to existing fields require a major
842
 * version bump.
843
 * sizeof(AVCodecContext) must not be used outside libav*.
844
 */
845
typedef struct AVCodecContext {
846
    /**
847
     * information on struct for av_log
848
     * - set by avcodec_alloc_context
849
     */
850
    const AVClass *av_class;
851
    /**
852
     * the average bitrate
853
     * - encoding: Set by user; unused for constant quantizer encoding.
854
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
855
     */
856
    int bit_rate;
857

    
858
    /**
859
     * number of bits the bitstream is allowed to diverge from the reference.
860
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
861
     * - encoding: Set by user; unused for constant quantizer encoding.
862
     * - decoding: unused
863
     */
864
    int bit_rate_tolerance;
865

    
866
    /**
867
     * CODEC_FLAG_*.
868
     * - encoding: Set by user.
869
     * - decoding: Set by user.
870
     */
871
    int flags;
872

    
873
    /**
874
     * Some codecs need additional format info. It is stored here.
875
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
876
     * specific codec MUST set it correctly otherwise stream copy breaks.
877
     * In general use of this field by muxers is not recommanded.
878
     * - encoding: Set by libavcodec.
879
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
880
     */
881
    int sub_id;
882

    
883
    /**
884
     * Motion estimation algorithm used for video coding.
885
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
886
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
887
     * - encoding: MUST be set by user.
888
     * - decoding: unused
889
     */
890
    int me_method;
891

    
892
    /**
893
     * some codecs need / can use extradata like Huffman tables.
894
     * mjpeg: Huffman tables
895
     * rv10: additional flags
896
     * mpeg4: global headers (they can be in the bitstream or here)
897
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
898
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
899
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
900
     * - encoding: Set/allocated/freed by libavcodec.
901
     * - decoding: Set/allocated/freed by user.
902
     */
903
    uint8_t *extradata;
904
    int extradata_size;
905

    
906
    /**
907
     * This is the fundamental unit of time (in seconds) in terms
908
     * of which frame timestamps are represented. For fixed-fps content,
909
     * timebase should be 1/framerate and timestamp increments should be
910
     * identically 1.
911
     * - encoding: MUST be set by user.
912
     * - decoding: Set by libavcodec.
913
     */
914
    AVRational time_base;
915

    
916
    /* video only */
917
    /**
918
     * picture width / height.
919
     * - encoding: MUST be set by user.
920
     * - decoding: Set by libavcodec.
921
     * Note: For compatibility it is possible to set this instead of
922
     * coded_width/height before decoding.
923
     */
924
    int width, height;
925

    
926
#define FF_ASPECT_EXTENDED 15
927

    
928
    /**
929
     * the number of pictures in a group of pictures, or 0 for intra_only
930
     * - encoding: Set by user.
931
     * - decoding: unused
932
     */
933
    int gop_size;
934

    
935
    /**
936
     * Pixel format, see PIX_FMT_xxx.
937
     * - encoding: Set by user.
938
     * - decoding: Set by libavcodec.
939
     */
940
    enum PixelFormat pix_fmt;
941

    
942
    /**
943
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
944
     * has to read frames at native frame rate.
945
     * - encoding: Set by user.
946
     * - decoding: unused
947
     */
948
    int rate_emu;
949

    
950
    /**
951
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
952
     * decoder to draw a horizontal band. It improves cache usage. Not
953
     * all codecs can do that. You must check the codec capabilities
954
     * beforehand.
955
     * - encoding: unused
956
     * - decoding: Set by user.
957
     * @param height the height of the slice
958
     * @param y the y position of the slice
959
     * @param type 1->top field, 2->bottom field, 3->frame
960
     * @param offset offset into the AVFrame.data from which the slice should be read
961
     */
962
    void (*draw_horiz_band)(struct AVCodecContext *s,
963
                            const AVFrame *src, int offset[4],
964
                            int y, int type, int height);
965

    
966
    /* audio only */
967
    int sample_rate; ///< samples per second
968
    int channels;    ///< number of audio channels
969

    
970
    /**
971
     * audio sample format
972
     * - encoding: Set by user.
973
     * - decoding: Set by libavcodec.
974
     */
975
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
976

    
977
    /* The following data should not be initialized. */
978
    /**
979
     * Samples per packet, initialized when calling 'init'.
980
     */
981
    int frame_size;
982
    int frame_number;   ///< audio or video frame number
983
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
984

    
985
    /**
986
     * Number of frames the decoded output will be delayed relative to
987
     * the encoded input.
988
     * - encoding: Set by libavcodec.
989
     * - decoding: unused
990
     */
991
    int delay;
992

    
993
    /* - encoding parameters */
994
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
995
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
996

    
997
    /**
998
     * minimum quantizer
999
     * - encoding: Set by user.
1000
     * - decoding: unused
1001
     */
1002
    int qmin;
1003

    
1004
    /**
1005
     * maximum quantizer
1006
     * - encoding: Set by user.
1007
     * - decoding: unused
1008
     */
1009
    int qmax;
1010

    
1011
    /**
1012
     * maximum quantizer difference between frames
1013
     * - encoding: Set by user.
1014
     * - decoding: unused
1015
     */
1016
    int max_qdiff;
1017

    
1018
    /**
1019
     * maximum number of B-frames between non-B-frames
1020
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1021
     * - encoding: Set by user.
1022
     * - decoding: unused
1023
     */
1024
    int max_b_frames;
1025

    
1026
    /**
1027
     * qscale factor between IP and B-frames
1028
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1029
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1030
     * - encoding: Set by user.
1031
     * - decoding: unused
1032
     */
1033
    float b_quant_factor;
1034

    
1035
    /** obsolete FIXME remove */
1036
    int rc_strategy;
1037
#define FF_RC_STRATEGY_XVID 1
1038

    
1039
    int b_frame_strategy;
1040

    
1041
    /**
1042
     * hurry up amount
1043
     * - encoding: unused
1044
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1045
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1046
     */
1047
    int hurry_up;
1048

    
1049
    struct AVCodec *codec;
1050

    
1051
    void *priv_data;
1052

    
1053
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1054
                            /* do its best to deliver a chunk with size     */
1055
                            /* below rtp_payload_size, the chunk will start */
1056
                            /* with a start code on some codecs like H.263. */
1057
                            /* This doesn't take account of any particular  */
1058
                            /* headers inside the transmitted RTP payload.  */
1059

    
1060

    
1061
    /* The RTP callback: This function is called    */
1062
    /* every time the encoder has a packet to send. */
1063
    /* It depends on the encoder if the data starts */
1064
    /* with a Start Code (it should). H.263 does.   */
1065
    /* mb_nb contains the number of macroblocks     */
1066
    /* encoded in the RTP payload.                  */
1067
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1068

    
1069
    /* statistics, used for 2-pass encoding */
1070
    int mv_bits;
1071
    int header_bits;
1072
    int i_tex_bits;
1073
    int p_tex_bits;
1074
    int i_count;
1075
    int p_count;
1076
    int skip_count;
1077
    int misc_bits;
1078

    
1079
    /**
1080
     * number of bits used for the previously encoded frame
1081
     * - encoding: Set by libavcodec.
1082
     * - decoding: unused
1083
     */
1084
    int frame_bits;
1085

    
1086
    /**
1087
     * Private data of the user, can be used to carry app specific stuff.
1088
     * - encoding: Set by user.
1089
     * - decoding: Set by user.
1090
     */
1091
    void *opaque;
1092

    
1093
    char codec_name[32];
1094
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1095
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1096

    
1097
    /**
1098
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1099
     * This is used to work around some encoder bugs.
1100
     * A demuxer should set this to what is stored in the field used to identify the codec.
1101
     * If there are multiple such fields in a container then the demuxer should choose the one
1102
     * which maximizes the information about the used codec.
1103
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1104
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1105
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1106
     * first.
1107
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1108
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1109
     */
1110
    unsigned int codec_tag;
1111

    
1112
    /**
1113
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1114
     * - encoding: Set by user
1115
     * - decoding: Set by user
1116
     */
1117
    int workaround_bugs;
1118
#define FF_BUG_AUTODETECT       1  ///< autodetection
1119
#define FF_BUG_OLD_MSMPEG4      2
1120
#define FF_BUG_XVID_ILACE       4
1121
#define FF_BUG_UMP4             8
1122
#define FF_BUG_NO_PADDING       16
1123
#define FF_BUG_AMV              32
1124
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1125
#define FF_BUG_QPEL_CHROMA      64
1126
#define FF_BUG_STD_QPEL         128
1127
#define FF_BUG_QPEL_CHROMA2     256
1128
#define FF_BUG_DIRECT_BLOCKSIZE 512
1129
#define FF_BUG_EDGE             1024
1130
#define FF_BUG_HPEL_CHROMA      2048
1131
#define FF_BUG_DC_CLIP          4096
1132
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1133
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1134

    
1135
    /**
1136
     * luma single coefficient elimination threshold
1137
     * - encoding: Set by user.
1138
     * - decoding: unused
1139
     */
1140
    int luma_elim_threshold;
1141

    
1142
    /**
1143
     * chroma single coeff elimination threshold
1144
     * - encoding: Set by user.
1145
     * - decoding: unused
1146
     */
1147
    int chroma_elim_threshold;
1148

    
1149
    /**
1150
     * strictly follow the standard (MPEG4, ...).
1151
     * - encoding: Set by user.
1152
     * - decoding: Set by user.
1153
     * Setting this to STRICT or higher means the encoder and decoder will
1154
     * generally do stupid things. While setting it to inofficial or lower
1155
     * will mean the encoder might use things that are not supported by all
1156
     * spec compliant decoders. Decoders make no difference between normal,
1157
     * inofficial and experimental, that is they always try to decode things
1158
     * when they can unless they are explicitly asked to behave stupid
1159
     * (=strictly conform to the specs)
1160
     */
1161
    int strict_std_compliance;
1162
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1163
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1164
#define FF_COMPLIANCE_NORMAL        0
1165
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1166
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1167

    
1168
    /**
1169
     * qscale offset between IP and B-frames
1170
     * - encoding: Set by user.
1171
     * - decoding: unused
1172
     */
1173
    float b_quant_offset;
1174

    
1175
    /**
1176
     * Error recognization; higher values will detect more errors but may
1177
     * misdetect some more or less valid parts as errors.
1178
     * - encoding: unused
1179
     * - decoding: Set by user.
1180
     */
1181
    int error_recognition;
1182
#define FF_ER_CAREFUL         1
1183
#define FF_ER_COMPLIANT       2
1184
#define FF_ER_AGGRESSIVE      3
1185
#define FF_ER_VERY_AGGRESSIVE 4
1186

    
1187
    /**
1188
     * Called at the beginning of each frame to get a buffer for it.
1189
     * If pic.reference is set then the frame will be read later by libavcodec.
1190
     * avcodec_align_dimensions() should be used to find the required width and
1191
     * height, as they normally need to be rounded up to the next multiple of 16.
1192
     * - encoding: unused
1193
     * - decoding: Set by libavcodec., user can override.
1194
     */
1195
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1196

    
1197
    /**
1198
     * Called to release buffers which were allocated with get_buffer.
1199
     * A released buffer can be reused in get_buffer().
1200
     * pic.data[*] must be set to NULL.
1201
     * - encoding: unused
1202
     * - decoding: Set by libavcodec., user can override.
1203
     */
1204
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1205

    
1206
    /**
1207
     * If 1 the stream has a 1 frame delay during decoding.
1208
     * - encoding: Set by libavcodec.
1209
     * - decoding: Set by libavcodec.
1210
     */
1211
    int has_b_frames;
1212

    
1213
    /**
1214
     * number of bytes per packet if constant and known or 0
1215
     * Used by some WAV based audio codecs.
1216
     */
1217
    int block_align;
1218

    
1219
    int parse_only; /* - decoding only: If true, only parsing is done
1220
                       (function avcodec_parse_frame()). The frame
1221
                       data is returned. Only MPEG codecs support this now. */
1222

    
1223
    /**
1224
     * 0-> h263 quant 1-> mpeg quant
1225
     * - encoding: Set by user.
1226
     * - decoding: unused
1227
     */
1228
    int mpeg_quant;
1229

    
1230
    /**
1231
     * pass1 encoding statistics output buffer
1232
     * - encoding: Set by libavcodec.
1233
     * - decoding: unused
1234
     */
1235
    char *stats_out;
1236

    
1237
    /**
1238
     * pass2 encoding statistics input buffer
1239
     * Concatenated stuff from stats_out of pass1 should be placed here.
1240
     * - encoding: Allocated/set/freed by user.
1241
     * - decoding: unused
1242
     */
1243
    char *stats_in;
1244

    
1245
    /**
1246
     * ratecontrol qmin qmax limiting method
1247
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1248
     * - encoding: Set by user.
1249
     * - decoding: unused
1250
     */
1251
    float rc_qsquish;
1252

    
1253
    float rc_qmod_amp;
1254
    int rc_qmod_freq;
1255

    
1256
    /**
1257
     * ratecontrol override, see RcOverride
1258
     * - encoding: Allocated/set/freed by user.
1259
     * - decoding: unused
1260
     */
1261
    RcOverride *rc_override;
1262
    int rc_override_count;
1263

    
1264
    /**
1265
     * rate control equation
1266
     * - encoding: Set by user
1267
     * - decoding: unused
1268
     */
1269
    const char *rc_eq;
1270

    
1271
    /**
1272
     * maximum bitrate
1273
     * - encoding: Set by user.
1274
     * - decoding: unused
1275
     */
1276
    int rc_max_rate;
1277

    
1278
    /**
1279
     * minimum bitrate
1280
     * - encoding: Set by user.
1281
     * - decoding: unused
1282
     */
1283
    int rc_min_rate;
1284

    
1285
    /**
1286
     * decoder bitstream buffer size
1287
     * - encoding: Set by user.
1288
     * - decoding: unused
1289
     */
1290
    int rc_buffer_size;
1291
    float rc_buffer_aggressivity;
1292

    
1293
    /**
1294
     * qscale factor between P and I-frames
1295
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1296
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1297
     * - encoding: Set by user.
1298
     * - decoding: unused
1299
     */
1300
    float i_quant_factor;
1301

    
1302
    /**
1303
     * qscale offset between P and I-frames
1304
     * - encoding: Set by user.
1305
     * - decoding: unused
1306
     */
1307
    float i_quant_offset;
1308

    
1309
    /**
1310
     * initial complexity for pass1 ratecontrol
1311
     * - encoding: Set by user.
1312
     * - decoding: unused
1313
     */
1314
    float rc_initial_cplx;
1315

    
1316
    /**
1317
     * DCT algorithm, see FF_DCT_* below
1318
     * - encoding: Set by user.
1319
     * - decoding: unused
1320
     */
1321
    int dct_algo;
1322
#define FF_DCT_AUTO    0
1323
#define FF_DCT_FASTINT 1
1324
#define FF_DCT_INT     2
1325
#define FF_DCT_MMX     3
1326
#define FF_DCT_MLIB    4
1327
#define FF_DCT_ALTIVEC 5
1328
#define FF_DCT_FAAN    6
1329

    
1330
    /**
1331
     * luminance masking (0-> disabled)
1332
     * - encoding: Set by user.
1333
     * - decoding: unused
1334
     */
1335
    float lumi_masking;
1336

    
1337
    /**
1338
     * temporary complexity masking (0-> disabled)
1339
     * - encoding: Set by user.
1340
     * - decoding: unused
1341
     */
1342
    float temporal_cplx_masking;
1343

    
1344
    /**
1345
     * spatial complexity masking (0-> disabled)
1346
     * - encoding: Set by user.
1347
     * - decoding: unused
1348
     */
1349
    float spatial_cplx_masking;
1350

    
1351
    /**
1352
     * p block masking (0-> disabled)
1353
     * - encoding: Set by user.
1354
     * - decoding: unused
1355
     */
1356
    float p_masking;
1357

    
1358
    /**
1359
     * darkness masking (0-> disabled)
1360
     * - encoding: Set by user.
1361
     * - decoding: unused
1362
     */
1363
    float dark_masking;
1364

    
1365
    /**
1366
     * IDCT algorithm, see FF_IDCT_* below.
1367
     * - encoding: Set by user.
1368
     * - decoding: Set by user.
1369
     */
1370
    int idct_algo;
1371
#define FF_IDCT_AUTO          0
1372
#define FF_IDCT_INT           1
1373
#define FF_IDCT_SIMPLE        2
1374
#define FF_IDCT_SIMPLEMMX     3
1375
#define FF_IDCT_LIBMPEG2MMX   4
1376
#define FF_IDCT_PS2           5
1377
#define FF_IDCT_MLIB          6
1378
#define FF_IDCT_ARM           7
1379
#define FF_IDCT_ALTIVEC       8
1380
#define FF_IDCT_SH4           9
1381
#define FF_IDCT_SIMPLEARM     10
1382
#define FF_IDCT_H264          11
1383
#define FF_IDCT_VP3           12
1384
#define FF_IDCT_IPP           13
1385
#define FF_IDCT_XVIDMMX       14
1386
#define FF_IDCT_CAVS          15
1387
#define FF_IDCT_SIMPLEARMV5TE 16
1388
#define FF_IDCT_SIMPLEARMV6   17
1389
#define FF_IDCT_SIMPLEVIS     18
1390
#define FF_IDCT_WMV2          19
1391
#define FF_IDCT_FAAN          20
1392
#define FF_IDCT_EA            21
1393
#define FF_IDCT_SIMPLENEON    22
1394

    
1395
    /**
1396
     * slice count
1397
     * - encoding: Set by libavcodec.
1398
     * - decoding: Set by user (or 0).
1399
     */
1400
    int slice_count;
1401
    /**
1402
     * slice offsets in the frame in bytes
1403
     * - encoding: Set/allocated by libavcodec.
1404
     * - decoding: Set/allocated by user (or NULL).
1405
     */
1406
    int *slice_offset;
1407

    
1408
    /**
1409
     * error concealment flags
1410
     * - encoding: unused
1411
     * - decoding: Set by user.
1412
     */
1413
    int error_concealment;
1414
#define FF_EC_GUESS_MVS   1
1415
#define FF_EC_DEBLOCK     2
1416

    
1417
    /**
1418
     * dsp_mask could be add used to disable unwanted CPU features
1419
     * CPU features (i.e. MMX, SSE. ...)
1420
     *
1421
     * With the FORCE flag you may instead enable given CPU features.
1422
     * (Dangerous: Usable in case of misdetection, improper usage however will
1423
     * result into program crash.)
1424
     */
1425
    unsigned dsp_mask;
1426
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1427
    /* lower 16 bits - CPU features */
1428
#define FF_MM_MMX      0x0001 ///< standard MMX
1429
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1430
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1431
#define FF_MM_SSE      0x0008 ///< SSE functions
1432
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1433
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1434
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1435
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1436
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1437
#define FF_MM_ALTIVEC  0x0001 ///< standard AltiVec
1438

    
1439
    /**
1440
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1441
     * - encoding: Set by libavcodec.
1442
     * - decoding: Set by user.
1443
     */
1444
     int bits_per_coded_sample;
1445

    
1446
    /**
1447
     * prediction method (needed for huffyuv)
1448
     * - encoding: Set by user.
1449
     * - decoding: unused
1450
     */
1451
     int prediction_method;
1452
#define FF_PRED_LEFT   0
1453
#define FF_PRED_PLANE  1
1454
#define FF_PRED_MEDIAN 2
1455

    
1456
    /**
1457
     * sample aspect ratio (0 if unknown)
1458
     * That is the width of a pixel divided by the height of the pixel.
1459
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1460
     * - encoding: Set by user.
1461
     * - decoding: Set by libavcodec.
1462
     */
1463
    AVRational sample_aspect_ratio;
1464

    
1465
    /**
1466
     * the picture in the bitstream
1467
     * - encoding: Set by libavcodec.
1468
     * - decoding: Set by libavcodec.
1469
     */
1470
    AVFrame *coded_frame;
1471

    
1472
    /**
1473
     * debug
1474
     * - encoding: Set by user.
1475
     * - decoding: Set by user.
1476
     */
1477
    int debug;
1478
#define FF_DEBUG_PICT_INFO   1
1479
#define FF_DEBUG_RC          2
1480
#define FF_DEBUG_BITSTREAM   4
1481
#define FF_DEBUG_MB_TYPE     8
1482
#define FF_DEBUG_QP          16
1483
#define FF_DEBUG_MV          32
1484
#define FF_DEBUG_DCT_COEFF   0x00000040
1485
#define FF_DEBUG_SKIP        0x00000080
1486
#define FF_DEBUG_STARTCODE   0x00000100
1487
#define FF_DEBUG_PTS         0x00000200
1488
#define FF_DEBUG_ER          0x00000400
1489
#define FF_DEBUG_MMCO        0x00000800
1490
#define FF_DEBUG_BUGS        0x00001000
1491
#define FF_DEBUG_VIS_QP      0x00002000
1492
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1493
#define FF_DEBUG_BUFFERS     0x00008000
1494

    
1495
    /**
1496
     * debug
1497
     * - encoding: Set by user.
1498
     * - decoding: Set by user.
1499
     */
1500
    int debug_mv;
1501
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1502
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1503
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1504

    
1505
    /**
1506
     * error
1507
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1508
     * - decoding: unused
1509
     */
1510
    uint64_t error[4];
1511

    
1512
    /**
1513
     * minimum MB quantizer
1514
     * - encoding: unused
1515
     * - decoding: unused
1516
     */
1517
    int mb_qmin;
1518

    
1519
    /**
1520
     * maximum MB quantizer
1521
     * - encoding: unused
1522
     * - decoding: unused
1523
     */
1524
    int mb_qmax;
1525

    
1526
    /**
1527
     * motion estimation comparison function
1528
     * - encoding: Set by user.
1529
     * - decoding: unused
1530
     */
1531
    int me_cmp;
1532
    /**
1533
     * subpixel motion estimation comparison function
1534
     * - encoding: Set by user.
1535
     * - decoding: unused
1536
     */
1537
    int me_sub_cmp;
1538
    /**
1539
     * macroblock comparison function (not supported yet)
1540
     * - encoding: Set by user.
1541
     * - decoding: unused
1542
     */
1543
    int mb_cmp;
1544
    /**
1545
     * interlaced DCT comparison function
1546
     * - encoding: Set by user.
1547
     * - decoding: unused
1548
     */
1549
    int ildct_cmp;
1550
#define FF_CMP_SAD    0
1551
#define FF_CMP_SSE    1
1552
#define FF_CMP_SATD   2
1553
#define FF_CMP_DCT    3
1554
#define FF_CMP_PSNR   4
1555
#define FF_CMP_BIT    5
1556
#define FF_CMP_RD     6
1557
#define FF_CMP_ZERO   7
1558
#define FF_CMP_VSAD   8
1559
#define FF_CMP_VSSE   9
1560
#define FF_CMP_NSSE   10
1561
#define FF_CMP_W53    11
1562
#define FF_CMP_W97    12
1563
#define FF_CMP_DCTMAX 13
1564
#define FF_CMP_DCT264 14
1565
#define FF_CMP_CHROMA 256
1566

    
1567
    /**
1568
     * ME diamond size & shape
1569
     * - encoding: Set by user.
1570
     * - decoding: unused
1571
     */
1572
    int dia_size;
1573

    
1574
    /**
1575
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1576
     * - encoding: Set by user.
1577
     * - decoding: unused
1578
     */
1579
    int last_predictor_count;
1580

    
1581
    /**
1582
     * prepass for motion estimation
1583
     * - encoding: Set by user.
1584
     * - decoding: unused
1585
     */
1586
    int pre_me;
1587

    
1588
    /**
1589
     * motion estimation prepass comparison function
1590
     * - encoding: Set by user.
1591
     * - decoding: unused
1592
     */
1593
    int me_pre_cmp;
1594

    
1595
    /**
1596
     * ME prepass diamond size & shape
1597
     * - encoding: Set by user.
1598
     * - decoding: unused
1599
     */
1600
    int pre_dia_size;
1601

    
1602
    /**
1603
     * subpel ME quality
1604
     * - encoding: Set by user.
1605
     * - decoding: unused
1606
     */
1607
    int me_subpel_quality;
1608

    
1609
    /**
1610
     * callback to negotiate the pixelFormat
1611
     * @param fmt is the list of formats which are supported by the codec,
1612
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1613
     * The first is always the native one.
1614
     * @return the chosen format
1615
     * - encoding: unused
1616
     * - decoding: Set by user, if not set the native format will be chosen.
1617
     */
1618
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1619

    
1620
    /**
1621
     * DTG active format information (additional aspect ratio
1622
     * information only used in DVB MPEG-2 transport streams)
1623
     * 0 if not set.
1624
     *
1625
     * - encoding: unused
1626
     * - decoding: Set by decoder.
1627
     */
1628
    int dtg_active_format;
1629
#define FF_DTG_AFD_SAME         8
1630
#define FF_DTG_AFD_4_3          9
1631
#define FF_DTG_AFD_16_9         10
1632
#define FF_DTG_AFD_14_9         11
1633
#define FF_DTG_AFD_4_3_SP_14_9  13
1634
#define FF_DTG_AFD_16_9_SP_14_9 14
1635
#define FF_DTG_AFD_SP_4_3       15
1636

    
1637
    /**
1638
     * maximum motion estimation search range in subpel units
1639
     * If 0 then no limit.
1640
     *
1641
     * - encoding: Set by user.
1642
     * - decoding: unused
1643
     */
1644
    int me_range;
1645

    
1646
    /**
1647
     * intra quantizer bias
1648
     * - encoding: Set by user.
1649
     * - decoding: unused
1650
     */
1651
    int intra_quant_bias;
1652
#define FF_DEFAULT_QUANT_BIAS 999999
1653

    
1654
    /**
1655
     * inter quantizer bias
1656
     * - encoding: Set by user.
1657
     * - decoding: unused
1658
     */
1659
    int inter_quant_bias;
1660

    
1661
    /**
1662
     * color table ID
1663
     * - encoding: unused
1664
     * - decoding: Which clrtable should be used for 8bit RGB images.
1665
     *             Tables have to be stored somewhere. FIXME
1666
     */
1667
    int color_table_id;
1668

    
1669
    /**
1670
     * internal_buffer count
1671
     * Don't touch, used by libavcodec default_get_buffer().
1672
     */
1673
    int internal_buffer_count;
1674

    
1675
    /**
1676
     * internal_buffers
1677
     * Don't touch, used by libavcodec default_get_buffer().
1678
     */
1679
    void *internal_buffer;
1680

    
1681
#define FF_LAMBDA_SHIFT 7
1682
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1683
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1684
#define FF_LAMBDA_MAX (256*128-1)
1685

    
1686
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1687
    /**
1688
     * Global quality for codecs which cannot change it per frame.
1689
     * This should be proportional to MPEG-1/2/4 qscale.
1690
     * - encoding: Set by user.
1691
     * - decoding: unused
1692
     */
1693
    int global_quality;
1694

    
1695
#define FF_CODER_TYPE_VLC       0
1696
#define FF_CODER_TYPE_AC        1
1697
#define FF_CODER_TYPE_RAW       2
1698
#define FF_CODER_TYPE_RLE       3
1699
#define FF_CODER_TYPE_DEFLATE   4
1700
    /**
1701
     * coder type
1702
     * - encoding: Set by user.
1703
     * - decoding: unused
1704
     */
1705
    int coder_type;
1706

    
1707
    /**
1708
     * context model
1709
     * - encoding: Set by user.
1710
     * - decoding: unused
1711
     */
1712
    int context_model;
1713
#if 0
1714
    /**
1715
     *
1716
     * - encoding: unused
1717
     * - decoding: Set by user.
1718
     */
1719
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1720
#endif
1721

    
1722
    /**
1723
     * slice flags
1724
     * - encoding: unused
1725
     * - decoding: Set by user.
1726
     */
1727
    int slice_flags;
1728
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1729
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1730
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1731

    
1732
    /**
1733
     * XVideo Motion Acceleration
1734
     * - encoding: forbidden
1735
     * - decoding: set by decoder
1736
     */
1737
    int xvmc_acceleration;
1738

    
1739
    /**
1740
     * macroblock decision mode
1741
     * - encoding: Set by user.
1742
     * - decoding: unused
1743
     */
1744
    int mb_decision;
1745
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1746
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1747
#define FF_MB_DECISION_RD     2        ///< rate distortion
1748

    
1749
    /**
1750
     * custom intra quantization matrix
1751
     * - encoding: Set by user, can be NULL.
1752
     * - decoding: Set by libavcodec.
1753
     */
1754
    uint16_t *intra_matrix;
1755

    
1756
    /**
1757
     * custom inter quantization matrix
1758
     * - encoding: Set by user, can be NULL.
1759
     * - decoding: Set by libavcodec.
1760
     */
1761
    uint16_t *inter_matrix;
1762

    
1763
    /**
1764
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1765
     * This is used to work around some encoder bugs.
1766
     * - encoding: unused
1767
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1768
     */
1769
    unsigned int stream_codec_tag;
1770

    
1771
    /**
1772
     * scene change detection threshold
1773
     * 0 is default, larger means fewer detected scene changes.
1774
     * - encoding: Set by user.
1775
     * - decoding: unused
1776
     */
1777
    int scenechange_threshold;
1778

    
1779
    /**
1780
     * minimum Lagrange multipler
1781
     * - encoding: Set by user.
1782
     * - decoding: unused
1783
     */
1784
    int lmin;
1785

    
1786
    /**
1787
     * maximum Lagrange multipler
1788
     * - encoding: Set by user.
1789
     * - decoding: unused
1790
     */
1791
    int lmax;
1792

    
1793
    /**
1794
     * palette control structure
1795
     * - encoding: ??? (no palette-enabled encoder yet)
1796
     * - decoding: Set by user.
1797
     */
1798
    struct AVPaletteControl *palctrl;
1799

    
1800
    /**
1801
     * noise reduction strength
1802
     * - encoding: Set by user.
1803
     * - decoding: unused
1804
     */
1805
    int noise_reduction;
1806

    
1807
    /**
1808
     * Called at the beginning of a frame to get cr buffer for it.
1809
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1810
     * libavcodec will pass previous buffer in pic, function should return
1811
     * same buffer or new buffer with old frame "painted" into it.
1812
     * If pic.data[0] == NULL must behave like get_buffer().
1813
     * - encoding: unused
1814
     * - decoding: Set by libavcodec., user can override
1815
     */
1816
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1817

    
1818
    /**
1819
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1820
     * - encoding: Set by user.
1821
     * - decoding: unused
1822
     */
1823
    int rc_initial_buffer_occupancy;
1824

    
1825
    /**
1826
     *
1827
     * - encoding: Set by user.
1828
     * - decoding: unused
1829
     */
1830
    int inter_threshold;
1831

    
1832
    /**
1833
     * CODEC_FLAG2_*
1834
     * - encoding: Set by user.
1835
     * - decoding: Set by user.
1836
     */
1837
    int flags2;
1838

    
1839
    /**
1840
     * Simulates errors in the bitstream to test error concealment.
1841
     * - encoding: Set by user.
1842
     * - decoding: unused
1843
     */
1844
    int error_rate;
1845

    
1846
    /**
1847
     * MP3 antialias algorithm, see FF_AA_* below.
1848
     * - encoding: unused
1849
     * - decoding: Set by user.
1850
     */
1851
    int antialias_algo;
1852
#define FF_AA_AUTO    0
1853
#define FF_AA_FASTINT 1 //not implemented yet
1854
#define FF_AA_INT     2
1855
#define FF_AA_FLOAT   3
1856
    /**
1857
     * quantizer noise shaping
1858
     * - encoding: Set by user.
1859
     * - decoding: unused
1860
     */
1861
    int quantizer_noise_shaping;
1862

    
1863
    /**
1864
     * thread count
1865
     * is used to decide how many independent tasks should be passed to execute()
1866
     * - encoding: Set by user.
1867
     * - decoding: Set by user.
1868
     */
1869
    int thread_count;
1870

    
1871
    /**
1872
     * The codec may call this to execute several independent things.
1873
     * It will return only after finishing all tasks.
1874
     * The user may replace this with some multithreaded implementation,
1875
     * the default implementation will execute the parts serially.
1876
     * @param count the number of things to execute
1877
     * - encoding: Set by libavcodec, user can override.
1878
     * - decoding: Set by libavcodec, user can override.
1879
     */
1880
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
1881

    
1882
    /**
1883
     * thread opaque
1884
     * Can be used by execute() to store some per AVCodecContext stuff.
1885
     * - encoding: set by execute()
1886
     * - decoding: set by execute()
1887
     */
1888
    void *thread_opaque;
1889

    
1890
    /**
1891
     * Motion estimation threshold below which no motion estimation is
1892
     * performed, but instead the user specified motion vectors are used.
1893
     *
1894
     * - encoding: Set by user.
1895
     * - decoding: unused
1896
     */
1897
     int me_threshold;
1898

    
1899
    /**
1900
     * Macroblock threshold below which the user specified macroblock types will be used.
1901
     * - encoding: Set by user.
1902
     * - decoding: unused
1903
     */
1904
     int mb_threshold;
1905

    
1906
    /**
1907
     * precision of the intra DC coefficient - 8
1908
     * - encoding: Set by user.
1909
     * - decoding: unused
1910
     */
1911
     int intra_dc_precision;
1912

    
1913
    /**
1914
     * noise vs. sse weight for the nsse comparsion function
1915
     * - encoding: Set by user.
1916
     * - decoding: unused
1917
     */
1918
     int nsse_weight;
1919

    
1920
    /**
1921
     * Number of macroblock rows at the top which are skipped.
1922
     * - encoding: unused
1923
     * - decoding: Set by user.
1924
     */
1925
     int skip_top;
1926

    
1927
    /**
1928
     * Number of macroblock rows at the bottom which are skipped.
1929
     * - encoding: unused
1930
     * - decoding: Set by user.
1931
     */
1932
     int skip_bottom;
1933

    
1934
    /**
1935
     * profile
1936
     * - encoding: Set by user.
1937
     * - decoding: Set by libavcodec.
1938
     */
1939
     int profile;
1940
#define FF_PROFILE_UNKNOWN -99
1941
#define FF_PROFILE_AAC_MAIN 0
1942
#define FF_PROFILE_AAC_LOW  1
1943
#define FF_PROFILE_AAC_SSR  2
1944
#define FF_PROFILE_AAC_LTP  3
1945

    
1946
    /**
1947
     * level
1948
     * - encoding: Set by user.
1949
     * - decoding: Set by libavcodec.
1950
     */
1951
     int level;
1952
#define FF_LEVEL_UNKNOWN -99
1953

    
1954
    /**
1955
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1956
     * - encoding: unused
1957
     * - decoding: Set by user.
1958
     */
1959
     int lowres;
1960

    
1961
    /**
1962
     * Bitstream width / height, may be different from width/height if lowres
1963
     * or other things are used.
1964
     * - encoding: unused
1965
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1966
     */
1967
    int coded_width, coded_height;
1968

    
1969
    /**
1970
     * frame skip threshold
1971
     * - encoding: Set by user.
1972
     * - decoding: unused
1973
     */
1974
    int frame_skip_threshold;
1975

    
1976
    /**
1977
     * frame skip factor
1978
     * - encoding: Set by user.
1979
     * - decoding: unused
1980
     */
1981
    int frame_skip_factor;
1982

    
1983
    /**
1984
     * frame skip exponent
1985
     * - encoding: Set by user.
1986
     * - decoding: unused
1987
     */
1988
    int frame_skip_exp;
1989

    
1990
    /**
1991
     * frame skip comparison function
1992
     * - encoding: Set by user.
1993
     * - decoding: unused
1994
     */
1995
    int frame_skip_cmp;
1996

    
1997
    /**
1998
     * Border processing masking, raises the quantizer for mbs on the borders
1999
     * of the picture.
2000
     * - encoding: Set by user.
2001
     * - decoding: unused
2002
     */
2003
    float border_masking;
2004

    
2005
    /**
2006
     * minimum MB lagrange multipler
2007
     * - encoding: Set by user.
2008
     * - decoding: unused
2009
     */
2010
    int mb_lmin;
2011

    
2012
    /**
2013
     * maximum MB lagrange multipler
2014
     * - encoding: Set by user.
2015
     * - decoding: unused
2016
     */
2017
    int mb_lmax;
2018

    
2019
    /**
2020
     *
2021
     * - encoding: Set by user.
2022
     * - decoding: unused
2023
     */
2024
    int me_penalty_compensation;
2025

    
2026
    /**
2027
     *
2028
     * - encoding: unused
2029
     * - decoding: Set by user.
2030
     */
2031
    enum AVDiscard skip_loop_filter;
2032

    
2033
    /**
2034
     *
2035
     * - encoding: unused
2036
     * - decoding: Set by user.
2037
     */
2038
    enum AVDiscard skip_idct;
2039

    
2040
    /**
2041
     *
2042
     * - encoding: unused
2043
     * - decoding: Set by user.
2044
     */
2045
    enum AVDiscard skip_frame;
2046

    
2047
    /**
2048
     *
2049
     * - encoding: Set by user.
2050
     * - decoding: unused
2051
     */
2052
    int bidir_refine;
2053

    
2054
    /**
2055
     *
2056
     * - encoding: Set by user.
2057
     * - decoding: unused
2058
     */
2059
    int brd_scale;
2060

    
2061
    /**
2062
     * constant rate factor - quality-based VBR - values ~correspond to qps
2063
     * - encoding: Set by user.
2064
     * - decoding: unused
2065
     */
2066
    float crf;
2067

    
2068
    /**
2069
     * constant quantization parameter rate control method
2070
     * - encoding: Set by user.
2071
     * - decoding: unused
2072
     */
2073
    int cqp;
2074

    
2075
    /**
2076
     * minimum GOP size
2077
     * - encoding: Set by user.
2078
     * - decoding: unused
2079
     */
2080
    int keyint_min;
2081

    
2082
    /**
2083
     * number of reference frames
2084
     * - encoding: Set by user.
2085
     * - decoding: Set by lavc.
2086
     */
2087
    int refs;
2088

    
2089
    /**
2090
     * chroma qp offset from luma
2091
     * - encoding: Set by user.
2092
     * - decoding: unused
2093
     */
2094
    int chromaoffset;
2095

    
2096
    /**
2097
     * Influences how often B-frames are used.
2098
     * - encoding: Set by user.
2099
     * - decoding: unused
2100
     */
2101
    int bframebias;
2102

    
2103
    /**
2104
     * trellis RD quantization
2105
     * - encoding: Set by user.
2106
     * - decoding: unused
2107
     */
2108
    int trellis;
2109

    
2110
    /**
2111
     * Reduce fluctuations in qp (before curve compression).
2112
     * - encoding: Set by user.
2113
     * - decoding: unused
2114
     */
2115
    float complexityblur;
2116

    
2117
    /**
2118
     * in-loop deblocking filter alphac0 parameter
2119
     * alpha is in the range -6...6
2120
     * - encoding: Set by user.
2121
     * - decoding: unused
2122
     */
2123
    int deblockalpha;
2124

    
2125
    /**
2126
     * in-loop deblocking filter beta parameter
2127
     * beta is in the range -6...6
2128
     * - encoding: Set by user.
2129
     * - decoding: unused
2130
     */
2131
    int deblockbeta;
2132

    
2133
    /**
2134
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2135
     * - encoding: Set by user.
2136
     * - decoding: unused
2137
     */
2138
    int partitions;
2139
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2140
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2141
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2142
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2143
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2144

    
2145
    /**
2146
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2147
     * - encoding: Set by user.
2148
     * - decoding: unused
2149
     */
2150
    int directpred;
2151

    
2152
    /**
2153
     * Audio cutoff bandwidth (0 means "automatic")
2154
     * - encoding: Set by user.
2155
     * - decoding: unused
2156
     */
2157
    int cutoff;
2158

    
2159
    /**
2160
     * Multiplied by qscale for each frame and added to scene_change_score.
2161
     * - encoding: Set by user.
2162
     * - decoding: unused
2163
     */
2164
    int scenechange_factor;
2165

    
2166
    /**
2167
     *
2168
     * Note: Value depends upon the compare function used for fullpel ME.
2169
     * - encoding: Set by user.
2170
     * - decoding: unused
2171
     */
2172
    int mv0_threshold;
2173

    
2174
    /**
2175
     * Adjusts sensitivity of b_frame_strategy 1.
2176
     * - encoding: Set by user.
2177
     * - decoding: unused
2178
     */
2179
    int b_sensitivity;
2180

    
2181
    /**
2182
     * - encoding: Set by user.
2183
     * - decoding: unused
2184
     */
2185
    int compression_level;
2186
#define FF_COMPRESSION_DEFAULT -1
2187

    
2188
    /**
2189
     * Sets whether to use LPC mode - used by FLAC encoder.
2190
     * - encoding: Set by user.
2191
     * - decoding: unused
2192
     */
2193
    int use_lpc;
2194

    
2195
    /**
2196
     * LPC coefficient precision - used by FLAC encoder
2197
     * - encoding: Set by user.
2198
     * - decoding: unused
2199
     */
2200
    int lpc_coeff_precision;
2201

    
2202
    /**
2203
     * - encoding: Set by user.
2204
     * - decoding: unused
2205
     */
2206
    int min_prediction_order;
2207

    
2208
    /**
2209
     * - encoding: Set by user.
2210
     * - decoding: unused
2211
     */
2212
    int max_prediction_order;
2213

    
2214
    /**
2215
     * search method for selecting prediction order
2216
     * - encoding: Set by user.
2217
     * - decoding: unused
2218
     */
2219
    int prediction_order_method;
2220

    
2221
    /**
2222
     * - encoding: Set by user.
2223
     * - decoding: unused
2224
     */
2225
    int min_partition_order;
2226

    
2227
    /**
2228
     * - encoding: Set by user.
2229
     * - decoding: unused
2230
     */
2231
    int max_partition_order;
2232

    
2233
    /**
2234
     * GOP timecode frame start number, in non drop frame format
2235
     * - encoding: Set by user.
2236
     * - decoding: unused
2237
     */
2238
    int64_t timecode_frame_start;
2239

    
2240
#if LIBAVCODEC_VERSION_MAJOR < 53
2241
    /**
2242
     * Decoder should decode to this many channels if it can (0 for default)
2243
     * - encoding: unused
2244
     * - decoding: Set by user.
2245
     * @deprecated Deprecated in favor of request_channel_layout.
2246
     */
2247
    int request_channels;
2248
#endif
2249

    
2250
    /**
2251
     * Percentage of dynamic range compression to be applied by the decoder.
2252
     * The default value is 1.0, corresponding to full compression.
2253
     * - encoding: unused
2254
     * - decoding: Set by user.
2255
     */
2256
    float drc_scale;
2257

    
2258
    /**
2259
     * opaque 64bit number (generally a PTS) that will be reordered and
2260
     * output in AVFrame.reordered_opaque
2261
     * - encoding: unused
2262
     * - decoding: Set by user.
2263
     */
2264
    int64_t reordered_opaque;
2265

    
2266
    /**
2267
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2268
     * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2269
     * - encoding: set by user.
2270
     * - decoding: set by libavcodec.
2271
     */
2272
    int bits_per_raw_sample;
2273

    
2274
    /**
2275
     * Audio channel layout.
2276
     * - encoding: set by user.
2277
     * - decoding: set by libavcodec.
2278
     */
2279
    int64_t channel_layout;
2280

    
2281
    /**
2282
     * Request decoder to use this channel layout if it can (0 for default)
2283
     * - encoding: unused
2284
     * - decoding: Set by user.
2285
     */
2286
    int64_t request_channel_layout;
2287

    
2288
    /**
2289
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2290
     * - encoding: Set by user.
2291
     * - decoding: unused.
2292
     */
2293
    float rc_max_available_vbv_use;
2294

    
2295
    /**
2296
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2297
     * - encoding: Set by user.
2298
     * - decoding: unused.
2299
     */
2300
    float rc_min_vbv_overflow_use;
2301
} AVCodecContext;
2302

    
2303
/**
2304
 * AVCodec.
2305
 */
2306
typedef struct AVCodec {
2307
    /**
2308
     * Name of the codec implementation.
2309
     * The name is globally unique among encoders and among decoders (but an
2310
     * encoder and a decoder can share the same name).
2311
     * This is the primary way to find a codec from the user perspective.
2312
     */
2313
    const char *name;
2314
    enum CodecType type;
2315
    enum CodecID id;
2316
    int priv_data_size;
2317
    int (*init)(AVCodecContext *);
2318
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2319
    int (*close)(AVCodecContext *);
2320
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2321
                  const uint8_t *buf, int buf_size);
2322
    /**
2323
     * Codec capabilities.
2324
     * see CODEC_CAP_*
2325
     */
2326
    int capabilities;
2327
    struct AVCodec *next;
2328
    /**
2329
     * Flush buffers.
2330
     * Will be called when seeking
2331
     */
2332
    void (*flush)(AVCodecContext *);
2333
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2334
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2335
    /**
2336
     * Descriptive name for the codec, meant to be more human readable than \p name.
2337
     * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it.
2338
     */
2339
    const char *long_name;
2340
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2341
    const enum SampleFormat *sample_fmts;   ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2342
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2343
} AVCodec;
2344

    
2345
/**
2346
 * four components are given, that's all.
2347
 * the last component is alpha
2348
 */
2349
typedef struct AVPicture {
2350
    uint8_t *data[4];
2351
    int linesize[4];       ///< number of bytes per line
2352
} AVPicture;
2353

    
2354
/**
2355
 * AVPaletteControl
2356
 * This structure defines a method for communicating palette changes
2357
 * between and demuxer and a decoder.
2358
 *
2359
 * @deprecated Use AVPacket to send palette changes instead.
2360
 * This is totally broken.
2361
 */
2362
#define AVPALETTE_SIZE 1024
2363
#define AVPALETTE_COUNT 256
2364
typedef struct AVPaletteControl {
2365

    
2366
    /* Demuxer sets this to 1 to indicate the palette has changed;
2367
     * decoder resets to 0. */
2368
    int palette_changed;
2369

    
2370
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2371
     * the individual palette components should be on a 8-bit scale; if
2372
     * the palette data comes from an IBM VGA native format, the component
2373
     * data is probably 6 bits in size and needs to be scaled. */
2374
    unsigned int palette[AVPALETTE_COUNT];
2375

    
2376
} AVPaletteControl attribute_deprecated;
2377

    
2378
enum AVSubtitleType {
2379
    SUBTITLE_NONE,
2380

    
2381
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
2382

    
2383
    /**
2384
     * Plain text, the text field must be set by the decoder and is
2385
     * authoritative. ass and pict fields may contain approximations.
2386
     */
2387
    SUBTITLE_TEXT,
2388

    
2389
    /**
2390
     * Formatted text, the ass field must be set by the decoder and is
2391
     * authoritative. pict and text fields may contain approximations.
2392
     */
2393
    SUBTITLE_ASS,
2394
};
2395

    
2396
typedef struct AVSubtitleRect {
2397
    uint16_t x;         ///< top left corner  of pict, undefined when pict is not set
2398
    uint16_t y;         ///< top left corner  of pict, undefined when pict is not set
2399
    uint16_t w;         ///< width            of pict, undefined when pict is not set
2400
    uint16_t h;         ///< height           of pict, undefined when pict is not set
2401
    uint16_t nb_colors; ///< number of colors in pict, undefined when pict is not set
2402
    int linesize;
2403
    uint32_t *rgba_palette;
2404
    uint8_t *bitmap;
2405
} AVSubtitleRect;
2406

    
2407
typedef struct AVSubtitle {
2408
    uint16_t format; /* 0 = graphics */
2409
    uint32_t start_display_time; /* relative to packet pts, in ms */
2410
    uint32_t end_display_time; /* relative to packet pts, in ms */
2411
    uint32_t num_rects;
2412
    AVSubtitleRect **rects;
2413
} AVSubtitle;
2414

    
2415

    
2416
/* resample.c */
2417

    
2418
struct ReSampleContext;
2419
struct AVResampleContext;
2420

    
2421
typedef struct ReSampleContext ReSampleContext;
2422

    
2423
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2424
                                     int output_rate, int input_rate);
2425
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2426
void audio_resample_close(ReSampleContext *s);
2427

    
2428
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2429
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2430
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2431
void av_resample_close(struct AVResampleContext *c);
2432

    
2433
/**
2434
 * Allocate memory for a picture.  Call avpicture_free to free it.
2435
 *
2436
 * @param picture the picture to be filled in
2437
 * @param pix_fmt the format of the picture
2438
 * @param width the width of the picture
2439
 * @param height the height of the picture
2440
 * @return zero if successful, a negative value if not
2441
 */
2442
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2443

    
2444
/**
2445
 * Free a picture previously allocated by avpicture_alloc().
2446
 *
2447
 * @param picture the AVPicture to be freed
2448
 */
2449
void avpicture_free(AVPicture *picture);
2450

    
2451
/**
2452
 * Fill in the AVPicture fields.
2453
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2454
 * which points to the image data buffer. Depending on the specified picture
2455
 * format, one or multiple image data pointers and line sizes will be set.
2456
 * If a planar format is specified, several pointers will be set pointing to
2457
 * the different picture planes and the line sizes of the different planes
2458
 * will be stored in the lines_sizes array.
2459
 *
2460
 * @param picture AVPicture whose fields are to be filled in
2461
 * @param ptr Buffer which will contain or contains the actual image data
2462
 * @param pix_fmt The format in which the picture data is stored.
2463
 * @param width the width of the image in pixels
2464
 * @param height the height of the image in pixels
2465
 * @return size of the image data in bytes
2466
 */
2467
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2468
                   int pix_fmt, int width, int height);
2469
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2470
                     unsigned char *dest, int dest_size);
2471

    
2472
/**
2473
 * Calculate the size in bytes that a picture of the given width and height
2474
 * would occupy if stored in the given picture format.
2475
 *
2476
 * @param pix_fmt the given picture format
2477
 * @param width the width of the image
2478
 * @param height the height of the image
2479
 * @return Image data size in bytes
2480
 */
2481
int avpicture_get_size(int pix_fmt, int width, int height);
2482
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2483
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2484
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2485
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2486
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2487

    
2488
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2489
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2490
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2491
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2492
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2493
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2494

    
2495
/**
2496
 * Computes what kind of losses will occur when converting from one specific
2497
 * pixel format to another.
2498
 * When converting from one pixel format to another, information loss may occur.
2499
 * For example, when converting from RGB24 to GRAY, the color information will
2500
 * be lost. Similarly, other losses occur when converting from some formats to
2501
 * other formats. These losses can involve loss of chroma, but also loss of
2502
 * resolution, loss of color depth, loss due to the color space conversion, loss
2503
 * of the alpha bits or loss due to color quantization.
2504
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2505
 * which will occur when converting from one pixel format to another.
2506
 *
2507
 * @param[in] dst_pix_fmt destination pixel format
2508
 * @param[in] src_pix_fmt source pixel format
2509
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2510
 * @return Combination of flags informing you what kind of losses will occur.
2511
 */
2512
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2513
                             int has_alpha);
2514

    
2515
/**
2516
 * Finds the best pixel format to convert to given a certain source pixel
2517
 * format.  When converting from one pixel format to another, information loss
2518
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2519
 * information will be lost. Similarly, other losses occur when converting from
2520
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2521
 * the given pixel formats should be used to suffer the least amount of loss.
2522
 * The pixel formats from which it chooses one, are determined by the
2523
 * \p pix_fmt_mask parameter.
2524
 *
2525
 * @code
2526
 * src_pix_fmt = PIX_FMT_YUV420P;
2527
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2528
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2529
 * @endcode
2530
 *
2531
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2532
 * @param[in] src_pix_fmt source pixel format
2533
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2534
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2535
 * @return The best pixel format to convert to or -1 if none was found.
2536
 */
2537
int avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, int src_pix_fmt,
2538
                              int has_alpha, int *loss_ptr);
2539

    
2540

    
2541
/**
2542
 * Print in buf the string corresponding to the pixel format with
2543
 * number pix_fmt, or an header if pix_fmt is negative.
2544
 *
2545
 * @param[in] buf the buffer where to write the string
2546
 * @param[in] buf_size the size of buf
2547
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2548
 * a negative value to print the corresponding header.
2549
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2550
 */
2551
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2552

    
2553
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2554
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2555

    
2556
/**
2557
 * Tell if an image really has transparent alpha values.
2558
 * @return ored mask of FF_ALPHA_xxx constants
2559
 */
2560
int img_get_alpha_info(const AVPicture *src,
2561
                       int pix_fmt, int width, int height);
2562

    
2563
/* deinterlace a picture */
2564
/* deinterlace - if not supported return -1 */
2565
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2566
                          int pix_fmt, int width, int height);
2567

    
2568
/* external high level API */
2569

    
2570
AVCodec *av_codec_next(AVCodec *c);
2571

    
2572
/**
2573
 * Returns the LIBAVCODEC_VERSION_INT constant.
2574
 */
2575
unsigned avcodec_version(void);
2576

    
2577
/**
2578
 * Initializes libavcodec.
2579
 *
2580
 * @warning This function \e must be called before any other libavcodec
2581
 * function.
2582
 */
2583
void avcodec_init(void);
2584

    
2585
/**
2586
 * Register the codec \p codec and initialize libavcodec.
2587
 *
2588
 * @see avcodec_init()
2589
 */
2590
void register_avcodec(AVCodec *codec);
2591

    
2592
/**
2593
 * Finds a registered encoder with a matching codec ID.
2594
 *
2595
 * @param id CodecID of the requested encoder
2596
 * @return An encoder if one was found, NULL otherwise.
2597
 */
2598
AVCodec *avcodec_find_encoder(enum CodecID id);
2599

    
2600
/**
2601
 * Finds a registered encoder with the specified name.
2602
 *
2603
 * @param name name of the requested encoder
2604
 * @return An encoder if one was found, NULL otherwise.
2605
 */
2606
AVCodec *avcodec_find_encoder_by_name(const char *name);
2607

    
2608
/**
2609
 * Finds a registered decoder with a matching codec ID.
2610
 *
2611
 * @param id CodecID of the requested decoder
2612
 * @return A decoder if one was found, NULL otherwise.
2613
 */
2614
AVCodec *avcodec_find_decoder(enum CodecID id);
2615

    
2616
/**
2617
 * Finds a registered decoder with the specified name.
2618
 *
2619
 * @param name name of the requested decoder
2620
 * @return A decoder if one was found, NULL otherwise.
2621
 */
2622
AVCodec *avcodec_find_decoder_by_name(const char *name);
2623
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2624

    
2625
/**
2626
 * Sets the fields of the given AVCodecContext to default values.
2627
 *
2628
 * @param s The AVCodecContext of which the fields should be set to default values.
2629
 */
2630
void avcodec_get_context_defaults(AVCodecContext *s);
2631

    
2632
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2633
 *  we WILL change its arguments and name a few times! */
2634
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2635

    
2636
/**
2637
 * Allocates an AVCodecContext and sets its fields to default values.  The
2638
 * resulting struct can be deallocated by simply calling av_free().
2639
 *
2640
 * @return An AVCodecContext filled with default values or NULL on failure.
2641
 * @see avcodec_get_context_defaults
2642
 */
2643
AVCodecContext *avcodec_alloc_context(void);
2644

    
2645
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2646
 *  we WILL change its arguments and name a few times! */
2647
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2648

    
2649
/**
2650
 * Sets the fields of the given AVFrame to default values.
2651
 *
2652
 * @param pic The AVFrame of which the fields should be set to default values.
2653
 */
2654
void avcodec_get_frame_defaults(AVFrame *pic);
2655

    
2656
/**
2657
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2658
 * struct can be deallocated by simply calling av_free().
2659
 *
2660
 * @return An AVFrame filled with default values or NULL on failure.
2661
 * @see avcodec_get_frame_defaults
2662
 */
2663
AVFrame *avcodec_alloc_frame(void);
2664

    
2665
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2666
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2667
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2668
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2669

    
2670
/**
2671
 * Checks if the given dimension of a picture is valid, meaning that all
2672
 * bytes of the picture can be addressed with a signed int.
2673
 *
2674
 * @param[in] w Width of the picture.
2675
 * @param[in] h Height of the picture.
2676
 * @return Zero if valid, a negative value if invalid.
2677
 */
2678
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2679
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2680

    
2681
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2682
void avcodec_thread_free(AVCodecContext *s);
2683
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
2684
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
2685
//FIXME func typedef
2686

    
2687
/**
2688
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2689
 * function the context has to be allocated.
2690
 *
2691
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2692
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2693
 * retrieving a codec.
2694
 *
2695
 * @warning This function is not thread safe!
2696
 *
2697
 * @code
2698
 * avcodec_register_all();
2699
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2700
 * if (!codec)
2701
 *     exit(1);
2702
 *
2703
 * context = avcodec_alloc_context();
2704
 *
2705
 * if (avcodec_open(context, codec) < 0)
2706
 *     exit(1);
2707
 * @endcode
2708
 *
2709
 * @param avctx The context which will be set up to use the given codec.
2710
 * @param codec The codec to use within the context.
2711
 * @return zero on success, a negative value on error
2712
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2713
 */
2714
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2715

    
2716
/**
2717
 * Decodes an audio frame from \p buf into \p samples.
2718
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2719
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2720
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2721
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2722
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2723
 * decompressed frame size in \e bytes.
2724
 *
2725
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2726
 * output buffer before calling avcodec_decode_audio2().
2727
 *
2728
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2729
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2730
 * bits at once and could read over the end.
2731
 *
2732
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2733
 * no overreading happens for damaged MPEG streams.
2734
 *
2735
 * @note You might have to align the input buffer \p buf and output buffer \p
2736
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2737
 * necessary at all, on others it won't work at all if not aligned and on others
2738
 * it will work but it will have an impact on performance. In practice, the
2739
 * bitstream should have 4 byte alignment at minimum and all sample data should
2740
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2741
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2742
 * start of the buffer to 16.
2743
 *
2744
 * @param avctx the codec context
2745
 * @param[out] samples the output buffer
2746
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2747
 * @param[in] buf the input buffer
2748
 * @param[in] buf_size the input buffer size in bytes
2749
 * @return On error a negative value is returned, otherwise the number of bytes
2750
 * used or zero if no frame could be decompressed.
2751
 */
2752
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2753
                         int *frame_size_ptr,
2754
                         const uint8_t *buf, int buf_size);
2755

    
2756
/**
2757
 * Decodes a video frame from \p buf into \p picture.
2758
 * The avcodec_decode_video() function decodes a video frame from the input
2759
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2760
 * video codec which was coupled with \p avctx using avcodec_open(). The
2761
 * resulting decoded frame is stored in \p picture.
2762
 *
2763
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2764
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2765
 * bits at once and could read over the end.
2766
 *
2767
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2768
 * no overreading happens for damaged MPEG streams.
2769
 *
2770
 * @note You might have to align the input buffer \p buf and output buffer \p
2771
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2772
 * necessary at all, on others it won't work at all if not aligned and on others
2773
 * it will work but it will have an impact on performance. In practice, the
2774
 * bitstream should have 4 byte alignment at minimum and all sample data should
2775
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2776
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2777
 * start of the buffer to 16.
2778
 *
2779
 * @param avctx the codec context
2780
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2781
 * @param[in] buf the input buffer
2782
 * @param[in] buf_size the size of the input buffer in bytes
2783
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2784
 * @return On error a negative value is returned, otherwise the number of bytes
2785
 * used or zero if no frame could be decompressed.
2786
 */
2787
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2788
                         int *got_picture_ptr,
2789
                         const uint8_t *buf, int buf_size);
2790

    
2791
/* Decode a subtitle message. Return -1 if error, otherwise return the
2792
 * number of bytes used. If no subtitle could be decompressed,
2793
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2794
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2795
                            int *got_sub_ptr,
2796
                            const uint8_t *buf, int buf_size);
2797
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2798
                        int *data_size_ptr,
2799
                        uint8_t *buf, int buf_size);
2800

    
2801
/**
2802
 * Encodes an audio frame from \p samples into \p buf.
2803
 * The avcodec_encode_audio() function encodes an audio frame from the input
2804
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2805
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2806
 * stored in output buffer \p buf.
2807
 *
2808
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2809
 *
2810
 * @param avctx the codec context
2811
 * @param[out] buf the output buffer
2812
 * @param[in] buf_size the output buffer size
2813
 * @param[in] samples the input buffer containing the samples
2814
 * The number of samples read from this buffer is frame_size*channels,
2815
 * both of which are defined in \p avctx.
2816
 * For PCM audio the number of samples read from \p samples is equal to
2817
 * \p buf_size * input_sample_size / output_sample_size.
2818
 * @return On error a negative value is returned, on success zero or the number
2819
 * of bytes used to encode the data read from the input buffer.
2820
 */
2821
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2822
                         const short *samples);
2823

    
2824
/**
2825
 * Encodes a video frame from \p pict into \p buf.
2826
 * The avcodec_encode_video() function encodes a video frame from the input
2827
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2828
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2829
 * frame are stored in the output buffer \p buf. The input picture should be
2830
 * stored using a specific format, namely \c avctx.pix_fmt.
2831
 *
2832
 * @param avctx the codec context
2833
 * @param[out] buf the output buffer for the bitstream of encoded frame
2834
 * @param[in] buf_size the size of the output buffer in bytes
2835
 * @param[in] pict the input picture to encode
2836
 * @return On error a negative value is returned, on success zero or the number
2837
 * of bytes used from the input buffer.
2838
 */
2839
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2840
                         const AVFrame *pict);
2841
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2842
                            const AVSubtitle *sub);
2843

    
2844
int avcodec_close(AVCodecContext *avctx);
2845

    
2846
/**
2847
 * Register all the codecs, parsers and bitstream filters which were enabled at
2848
 * configuration time. If you do not call this function you can select exactly
2849
 * which formats you want to support, by using the individual registration
2850
 * functions.
2851
 *
2852
 * @see register_avcodec
2853
 * @see av_register_codec_parser
2854
 * @see av_register_bitstream_filter
2855
 */
2856
void avcodec_register_all(void);
2857

    
2858
/**
2859
 * Flush buffers, should be called when seeking or when switching to a different stream.
2860
 */
2861
void avcodec_flush_buffers(AVCodecContext *avctx);
2862

    
2863
void avcodec_default_free_buffers(AVCodecContext *s);
2864

    
2865
/* misc useful functions */
2866

    
2867
/**
2868
 * Returns a single letter to describe the given picture type \p pict_type.
2869
 *
2870
 * @param[in] pict_type the picture type
2871
 * @return A single character representing the picture type.
2872
 */
2873
char av_get_pict_type_char(int pict_type);
2874

    
2875
/**
2876
 * Returns codec bits per sample.
2877
 *
2878
 * @param[in] codec_id the codec
2879
 * @return Number of bits per sample or zero if unknown for the given codec.
2880
 */
2881
int av_get_bits_per_sample(enum CodecID codec_id);
2882

    
2883
/**
2884
 * Returns sample format bits per sample.
2885
 *
2886
 * @param[in] sample_fmt the sample format
2887
 * @return Number of bits per sample or zero if unknown for the given sample format.
2888
 */
2889
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2890

    
2891
/* frame parsing */
2892
typedef struct AVCodecParserContext {
2893
    void *priv_data;
2894
    struct AVCodecParser *parser;
2895
    int64_t frame_offset; /* offset of the current frame */
2896
    int64_t cur_offset; /* current offset
2897
                           (incremented by each av_parser_parse()) */
2898
    int64_t next_frame_offset; /* offset of the next frame */
2899
    /* video info */
2900
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2901
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2902
    int64_t pts;     /* pts of the current frame */
2903
    int64_t dts;     /* dts of the current frame */
2904

    
2905
    /* private data */
2906
    int64_t last_pts;
2907
    int64_t last_dts;
2908
    int fetch_timestamp;
2909

    
2910
#define AV_PARSER_PTS_NB 4
2911
    int cur_frame_start_index;
2912
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2913
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2914
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2915

    
2916
    int flags;
2917
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2918

    
2919
    int64_t offset;      ///< byte offset from starting packet start
2920
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
2921
} AVCodecParserContext;
2922

    
2923
typedef struct AVCodecParser {
2924
    int codec_ids[5]; /* several codec IDs are permitted */
2925
    int priv_data_size;
2926
    int (*parser_init)(AVCodecParserContext *s);
2927
    int (*parser_parse)(AVCodecParserContext *s,
2928
                        AVCodecContext *avctx,
2929
                        const uint8_t **poutbuf, int *poutbuf_size,
2930
                        const uint8_t *buf, int buf_size);
2931
    void (*parser_close)(AVCodecParserContext *s);
2932
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2933
    struct AVCodecParser *next;
2934
} AVCodecParser;
2935

    
2936
AVCodecParser *av_parser_next(AVCodecParser *c);
2937

    
2938
void av_register_codec_parser(AVCodecParser *parser);
2939
AVCodecParserContext *av_parser_init(int codec_id);
2940
int av_parser_parse(AVCodecParserContext *s,
2941
                    AVCodecContext *avctx,
2942
                    uint8_t **poutbuf, int *poutbuf_size,
2943
                    const uint8_t *buf, int buf_size,
2944
                    int64_t pts, int64_t dts);
2945
int av_parser_change(AVCodecParserContext *s,
2946
                     AVCodecContext *avctx,
2947
                     uint8_t **poutbuf, int *poutbuf_size,
2948
                     const uint8_t *buf, int buf_size, int keyframe);
2949
void av_parser_close(AVCodecParserContext *s);
2950

    
2951

    
2952
typedef struct AVBitStreamFilterContext {
2953
    void *priv_data;
2954
    struct AVBitStreamFilter *filter;
2955
    AVCodecParserContext *parser;
2956
    struct AVBitStreamFilterContext *next;
2957
} AVBitStreamFilterContext;
2958

    
2959

    
2960
typedef struct AVBitStreamFilter {
2961
    const char *name;
2962
    int priv_data_size;
2963
    int (*filter)(AVBitStreamFilterContext *bsfc,
2964
                  AVCodecContext *avctx, const char *args,
2965
                  uint8_t **poutbuf, int *poutbuf_size,
2966
                  const uint8_t *buf, int buf_size, int keyframe);
2967
    void (*close)(AVBitStreamFilterContext *bsfc);
2968
    struct AVBitStreamFilter *next;
2969
} AVBitStreamFilter;
2970

    
2971
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2972
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2973
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2974
                               AVCodecContext *avctx, const char *args,
2975
                               uint8_t **poutbuf, int *poutbuf_size,
2976
                               const uint8_t *buf, int buf_size, int keyframe);
2977
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2978

    
2979
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2980

    
2981
/* memory */
2982

    
2983
/**
2984
 * Reallocates the given block if it is not large enough, otherwise it
2985
 * does nothing.
2986
 *
2987
 * @see av_realloc
2988
 */
2989
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2990

    
2991
/**
2992
 * Copy image 'src' to 'dst'.
2993
 */
2994
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2995
              int pix_fmt, int width, int height);
2996

    
2997
/**
2998
 * Crop image top and left side.
2999
 */
3000
int av_picture_crop(AVPicture *dst, const AVPicture *src,
3001
             int pix_fmt, int top_band, int left_band);
3002

    
3003
/**
3004
 * Pad image.
3005
 */
3006
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3007
            int padtop, int padbottom, int padleft, int padright, int *color);
3008

    
3009
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3010

    
3011
/**
3012
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
3013
 *
3014
 * @return 0 in case of a successful parsing, a negative value otherwise
3015
 * @param[in] str the string to parse: it has to be a string in the format
3016
 * <width>x<height> or a valid video frame size abbreviation.
3017
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
3018
 * frame width value
3019
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
3020
 * frame height value
3021
 */
3022
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
3023

    
3024
/**
3025
 * Parses \p str and put in \p frame_rate the detected values.
3026
 *
3027
 * @return 0 in case of a successful parsing, a negative value otherwise
3028
 * @param[in] str the string to parse: it has to be a string in the format
3029
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
3030
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
3031
 * frame rate
3032
 */
3033
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
3034

    
3035
/* error handling */
3036
#if EINVAL > 0
3037
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3038
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3039
#else
3040
/* Some platforms have E* and errno already negated. */
3041
#define AVERROR(e) (e)
3042
#define AVUNERROR(e) (e)
3043
#endif
3044
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3045
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3046
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3047
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3048
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3049
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3050
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3051
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3052
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3053

    
3054
#endif /* AVCODEC_AVCODEC_H */