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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 FFMPEG_AVCODEC_H
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#define FFMPEG_AVCODEC_H
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/**
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 * @file avcodec.h
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 * external API header
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 */
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#include "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 51
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#define LIBAVCODEC_VERSION_MINOR 54
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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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    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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    /* various PCM "codecs" */
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    CODEC_ID_PCM_S16LE= 0x10000,
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    CODEC_ID_PCM_S16BE,
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    CODEC_ID_PCM_U16LE,
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    CODEC_ID_PCM_U16BE,
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    CODEC_ID_PCM_S8,
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    CODEC_ID_PCM_U8,
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    CODEC_ID_PCM_MULAW,
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    CODEC_ID_PCM_ALAW,
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    CODEC_ID_PCM_S32LE,
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    CODEC_ID_PCM_S32BE,
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    CODEC_ID_PCM_U32LE,
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    CODEC_ID_PCM_U32BE,
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    CODEC_ID_PCM_S24LE,
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    CODEC_ID_PCM_S24BE,
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    CODEC_ID_PCM_U24LE,
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    CODEC_ID_PCM_U24BE,
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    CODEC_ID_PCM_S24DAUD,
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    CODEC_ID_PCM_ZORK,
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    CODEC_ID_PCM_S16LE_PLANAR,
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    /* various ADPCM codecs */
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    CODEC_ID_ADPCM_IMA_QT= 0x11000,
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    CODEC_ID_ADPCM_IMA_WAV,
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    CODEC_ID_ADPCM_IMA_DK3,
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    CODEC_ID_ADPCM_IMA_DK4,
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    CODEC_ID_ADPCM_IMA_WS,
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    CODEC_ID_ADPCM_IMA_SMJPEG,
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    CODEC_ID_ADPCM_MS,
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    CODEC_ID_ADPCM_4XM,
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    CODEC_ID_ADPCM_XA,
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    CODEC_ID_ADPCM_ADX,
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    CODEC_ID_ADPCM_EA,
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    CODEC_ID_ADPCM_G726,
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    CODEC_ID_ADPCM_CT,
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    CODEC_ID_ADPCM_SWF,
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    CODEC_ID_ADPCM_YAMAHA,
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    CODEC_ID_ADPCM_SBPRO_4,
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    CODEC_ID_ADPCM_SBPRO_3,
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    CODEC_ID_ADPCM_SBPRO_2,
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    CODEC_ID_ADPCM_THP,
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    CODEC_ID_ADPCM_IMA_AMV,
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    CODEC_ID_ADPCM_EA_R1,
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    CODEC_ID_ADPCM_EA_R3,
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    CODEC_ID_ADPCM_EA_R2,
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    CODEC_ID_ADPCM_IMA_EA_SEAD,
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    CODEC_ID_ADPCM_IMA_EA_EACS,
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    CODEC_ID_ADPCM_EA_XAS,
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    /* AMR */
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    CODEC_ID_AMR_NB= 0x12000,
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    CODEC_ID_AMR_WB,
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    /* RealAudio codecs*/
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    CODEC_ID_RA_144= 0x13000,
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    CODEC_ID_RA_288,
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    /* various DPCM codecs */
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    CODEC_ID_ROQ_DPCM= 0x14000,
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    CODEC_ID_INTERPLAY_DPCM,
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    CODEC_ID_XAN_DPCM,
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    CODEC_ID_SOL_DPCM,
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    CODEC_ID_MP2= 0x15000,
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    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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    CODEC_ID_AAC,
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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    CODEC_ID_MPEG4AAC,
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#endif
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    CODEC_ID_AC3,
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    CODEC_ID_DTS,
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    CODEC_ID_VORBIS,
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    CODEC_ID_DVAUDIO,
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    CODEC_ID_WMAV1,
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    CODEC_ID_WMAV2,
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    CODEC_ID_MACE3,
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    CODEC_ID_MACE6,
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    CODEC_ID_VMDAUDIO,
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    CODEC_ID_SONIC,
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    CODEC_ID_SONIC_LS,
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    CODEC_ID_FLAC,
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    CODEC_ID_MP3ADU,
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    CODEC_ID_MP3ON4,
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    CODEC_ID_SHORTEN,
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    CODEC_ID_ALAC,
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    CODEC_ID_WESTWOOD_SND1,
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    CODEC_ID_GSM, ///< as in Berlin toast format
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    CODEC_ID_QDM2,
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    CODEC_ID_COOK,
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    CODEC_ID_TRUESPEECH,
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    CODEC_ID_TTA,
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    CODEC_ID_SMACKAUDIO,
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    CODEC_ID_QCELP,
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    CODEC_ID_WAVPACK,
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    CODEC_ID_DSICINAUDIO,
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    CODEC_ID_IMC,
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    CODEC_ID_MUSEPACK7,
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    CODEC_ID_MLP,
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    CODEC_ID_GSM_MS, /* as found in WAV */
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    CODEC_ID_ATRAC3,
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    CODEC_ID_VOXWARE,
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    CODEC_ID_APE,
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    CODEC_ID_NELLYMOSER,
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    CODEC_ID_MUSEPACK8,
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    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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    /* 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_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
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                                * stream (only used by libavformat) */
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};
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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/* CODEC_ID_MP3LAME is obsolete */
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#define CODEC_ID_MP3LAME CODEC_ID_MP3
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
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#endif
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enum CodecType {
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    CODEC_TYPE_UNKNOWN = -1,
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    CODEC_TYPE_VIDEO,
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    CODEC_TYPE_AUDIO,
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    CODEC_TYPE_DATA,
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    CODEC_TYPE_SUBTITLE,
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    CODEC_TYPE_ATTACHMENT,
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    CODEC_TYPE_NB
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};
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/**
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 * Currently unused, may be used if 24/32 bits samples are ever supported.
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 * all in native-endian format
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 */
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enum SampleFormat {
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    SAMPLE_FMT_NONE = -1,
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    SAMPLE_FMT_U8,              ///< unsigned 8 bits
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    SAMPLE_FMT_S16,             ///< signed 16 bits
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    SAMPLE_FMT_S24,             ///< signed 24 bits
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    SAMPLE_FMT_S32,             ///< signed 32 bits
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    SAMPLE_FMT_FLT,             ///< float
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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/**
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 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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 * This is mainly needed because some optimized bitstream readers read
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 * 32 or 64 bit at once and could read over the end.<br>
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 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
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 * MPEG bitstreams could cause overread and segfault.
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 */
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/**
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 * minimum encoding buffer size
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 * Used to avoid some checks during header writing.
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 */
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#define FF_MIN_BUFFER_SIZE 16384
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/**
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 * motion estimation type.
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 */
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enum Motion_Est_ID {
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    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,        ///< enhanced predictive zonal search
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    ME_X1,          ///< reserved for experiments
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    ME_HEX,         ///< hexagon based search
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    ME_UMH,         ///< uneven multi-hexagon search
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    ME_ITER,        ///< iterative search
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};
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enum AVDiscard{
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    /* We leave some space between them for extensions (drop some
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     * keyframes for intra-only or drop just some bidir frames). */
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    AVDISCARD_NONE   =-16, ///< discard nothing
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    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
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    AVDISCARD_NONREF =  8, ///< discard all non reference
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    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
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    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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    AVDISCARD_ALL    = 48, ///< discard all
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};
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typedef struct RcOverride{
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    int start_frame;
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    int end_frame;
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    int qscale; // If this is 0 then quality_factor will be used instead.
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    float quality_factor;
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} RcOverride;
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#define FF_MAX_B_FRAMES 16
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/* encoding support
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   These flags can be passed in AVCodecContext.flags before initialization.
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   Note: Not everything is supported yet.
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*/
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#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
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#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
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#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
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#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
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#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
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#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
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/**
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 * The parent program guarantees that the input for B-frames containing
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 * streams is not written to for at least s->max_b_frames+1 frames, if
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 * this is not set the input will be copied.
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 */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
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#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
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#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
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#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
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#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
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#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
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#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
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                                                  location instead of only at frame boundaries. */
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#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
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#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
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#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
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#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< Use trellis quantization.
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#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
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#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
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/* Fx : Flag for h263+ extra options */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
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#endif
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#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
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#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
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#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
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#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
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#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
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#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
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#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
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#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
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#define CODEC_FLAG_CLOSED_GOP     0x80000000
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#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
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#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
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#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
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#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
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#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
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#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
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#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
447
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
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#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
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#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
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#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
451
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
452
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
453
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
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#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
455
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
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#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
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458
/* Unsupported options :
459
 *              Syntax Arithmetic coding (SAC)
460
 *              Reference Picture Selection
461
 *              Independent Segment Decoding */
462
/* /Fx */
463
/* codec capabilities */
464

    
465
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
466
/**
467
 * Codec uses get_buffer() for allocating buffers.
468
 * direct rendering method 1
469
 */
470
#define CODEC_CAP_DR1             0x0002
471
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
472
#define CODEC_CAP_PARSE_ONLY      0x0004
473
#define CODEC_CAP_TRUNCATED       0x0008
474
/* Codec can export data for HW decoding (XvMC). */
475
#define CODEC_CAP_HWACCEL         0x0010
476
/**
477
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
478
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
479
 */
480
#define CODEC_CAP_DELAY           0x0020
481
/**
482
 * Codec can be fed a final frame with a smaller size.
483
 * This can be used to prevent truncation of the last audio samples.
484
 */
485
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
486

    
487
//The following defines may change, don't expect compatibility if you use them.
488
#define MB_TYPE_INTRA4x4   0x0001
489
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
490
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
491
#define MB_TYPE_16x16      0x0008
492
#define MB_TYPE_16x8       0x0010
493
#define MB_TYPE_8x16       0x0020
494
#define MB_TYPE_8x8        0x0040
495
#define MB_TYPE_INTERLACED 0x0080
496
#define MB_TYPE_DIRECT2    0x0100 //FIXME
497
#define MB_TYPE_ACPRED     0x0200
498
#define MB_TYPE_GMC        0x0400
499
#define MB_TYPE_SKIP       0x0800
500
#define MB_TYPE_P0L0       0x1000
501
#define MB_TYPE_P1L0       0x2000
502
#define MB_TYPE_P0L1       0x4000
503
#define MB_TYPE_P1L1       0x8000
504
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
505
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
506
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
507
#define MB_TYPE_QUANT      0x00010000
508
#define MB_TYPE_CBP        0x00020000
509
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
510

    
511
/**
512
 * Pan Scan area.
513
 * This specifies the area which should be displayed.
514
 * Note there may be multiple such areas for one frame.
515
 */
516
typedef struct AVPanScan{
517
    /**
518
     * id
519
     * - encoding: Set by user.
520
     * - decoding: Set by libavcodec.
521
     */
522
    int id;
523

    
524
    /**
525
     * width and height in 1/16 pel
526
     * - encoding: Set by user.
527
     * - decoding: Set by libavcodec.
528
     */
529
    int width;
530
    int height;
531

    
532
    /**
533
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
534
     * - encoding: Set by user.
535
     * - decoding: Set by libavcodec.
536
     */
537
    int16_t position[3][2];
538
}AVPanScan;
539

    
540
#define FF_COMMON_FRAME \
541
    /**\
542
     * pointer to the picture planes.\
543
     * This might be different from the first allocated byte\
544
     * - encoding: \
545
     * - decoding: \
546
     */\
547
    uint8_t *data[4];\
548
    int linesize[4];\
549
    /**\
550
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
551
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
552
     * - encoding: \
553
     * - decoding: \
554
     */\
555
    uint8_t *base[4];\
556
    /**\
557
     * 1 -> keyframe, 0-> not\
558
     * - encoding: Set by libavcodec.\
559
     * - decoding: Set by libavcodec.\
560
     */\
561
    int key_frame;\
562
\
563
    /**\
564
     * Picture type of the frame, see ?_TYPE below.\
565
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
566
     * - decoding: Set by libavcodec.\
567
     */\
568
    int pict_type;\
569
\
570
    /**\
571
     * presentation timestamp in time_base units (time when frame should be shown to user)\
572
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
573
     * - encoding: MUST be set by user.\
574
     * - decoding: Set by libavcodec.\
575
     */\
576
    int64_t pts;\
577
\
578
    /**\
579
     * picture number in bitstream order\
580
     * - encoding: set by\
581
     * - decoding: Set by libavcodec.\
582
     */\
583
    int coded_picture_number;\
584
    /**\
585
     * picture number in display order\
586
     * - encoding: set by\
587
     * - decoding: Set by libavcodec.\
588
     */\
589
    int display_picture_number;\
590
\
591
    /**\
592
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
593
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
594
     * - decoding: Set by libavcodec.\
595
     */\
596
    int quality; \
597
\
598
    /**\
599
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
600
     * Set to INT_MAX if the buffer has not been used yet.\
601
     * - encoding: unused\
602
     * - decoding: MUST be set by get_buffer().\
603
     */\
604
    int age;\
605
\
606
    /**\
607
     * is this picture used as reference\
608
     * The values for this are the same as the MpegEncContext.picture_structure\
609
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
610
     * - encoding: unused\
611
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
612
     */\
613
    int reference;\
614
\
615
    /**\
616
     * QP table\
617
     * - encoding: unused\
618
     * - decoding: Set by libavcodec.\
619
     */\
620
    int8_t *qscale_table;\
621
    /**\
622
     * QP store stride\
623
     * - encoding: unused\
624
     * - decoding: Set by libavcodec.\
625
     */\
626
    int qstride;\
627
\
628
    /**\
629
     * mbskip_table[mb]>=1 if MB didn't change\
630
     * stride= mb_width = (width+15)>>4\
631
     * - encoding: unused\
632
     * - decoding: Set by libavcodec.\
633
     */\
634
    uint8_t *mbskip_table;\
635
\
636
    /**\
637
     * motion vector table\
638
     * @code\
639
     * example:\
640
     * int mv_sample_log2= 4 - motion_subsample_log2;\
641
     * int mb_width= (width+15)>>4;\
642
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
643
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
644
     * @endcode\
645
     * - encoding: Set by user.\
646
     * - decoding: Set by libavcodec.\
647
     */\
648
    int16_t (*motion_val[2])[2];\
649
\
650
    /**\
651
     * macroblock type table\
652
     * mb_type_base + mb_width + 2\
653
     * - encoding: Set by user.\
654
     * - decoding: Set by libavcodec.\
655
     */\
656
    uint32_t *mb_type;\
657
\
658
    /**\
659
     * log2 of the size of the block which a single vector in motion_val represents: \
660
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
661
     * - encoding: unused\
662
     * - decoding: Set by libavcodec.\
663
     */\
664
    uint8_t motion_subsample_log2;\
665
\
666
    /**\
667
     * for some private data of the user\
668
     * - encoding: unused\
669
     * - decoding: Set by user.\
670
     */\
671
    void *opaque;\
672
\
673
    /**\
674
     * error\
675
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
676
     * - decoding: unused\
677
     */\
678
    uint64_t error[4];\
679
\
680
    /**\
681
     * type of the buffer (to keep track of who has to deallocate data[*])\
682
     * - encoding: Set by the one who allocates it.\
683
     * - decoding: Set by the one who allocates it.\
684
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
685
     */\
686
    int type;\
687
    \
688
    /**\
689
     * When decoding, this signals how much the picture must be delayed.\
690
     * extra_delay = repeat_pict / (2*fps)\
691
     * - encoding: unused\
692
     * - decoding: Set by libavcodec.\
693
     */\
694
    int repeat_pict;\
695
    \
696
    /**\
697
     * \
698
     */\
699
    int qscale_type;\
700
    \
701
    /**\
702
     * The content of the picture is interlaced.\
703
     * - encoding: Set by user.\
704
     * - decoding: Set by libavcodec. (default 0)\
705
     */\
706
    int interlaced_frame;\
707
    \
708
    /**\
709
     * If the content is interlaced, is top field displayed first.\
710
     * - encoding: Set by user.\
711
     * - decoding: Set by libavcodec.\
712
     */\
713
    int top_field_first;\
714
    \
715
    /**\
716
     * Pan scan.\
717
     * - encoding: Set by user.\
718
     * - decoding: Set by libavcodec.\
719
     */\
720
    AVPanScan *pan_scan;\
721
    \
722
    /**\
723
     * Tell user application that palette has changed from previous frame.\
724
     * - encoding: ??? (no palette-enabled encoder yet)\
725
     * - decoding: Set by libavcodec. (default 0).\
726
     */\
727
    int palette_has_changed;\
728
    \
729
    /**\
730
     * codec suggestion on buffer type if != 0\
731
     * - encoding: unused\
732
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
733
     */\
734
    int buffer_hints;\
735
\
736
    /**\
737
     * DCT coefficients\
738
     * - encoding: unused\
739
     * - decoding: Set by libavcodec.\
740
     */\
741
    short *dct_coeff;\
742
\
743
    /**\
744
     * motion referece frame index\
745
     * - encoding: Set by user.\
746
     * - decoding: Set by libavcodec.\
747
     */\
748
    int8_t *ref_index[2];
749

    
750
#define FF_QSCALE_TYPE_MPEG1 0
751
#define FF_QSCALE_TYPE_MPEG2 1
752
#define FF_QSCALE_TYPE_H264  2
753

    
754
#define FF_BUFFER_TYPE_INTERNAL 1
755
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
756
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
757
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
758

    
759

    
760
#define FF_I_TYPE  1 ///< Intra
761
#define FF_P_TYPE  2 ///< Predicted
762
#define FF_B_TYPE  3 ///< Bi-dir predicted
763
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
764
#define FF_SI_TYPE 5 ///< Switching Intra
765
#define FF_SP_TYPE 6 ///< Switching Predicted
766
#define FF_BI_TYPE 7
767

    
768
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
769
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
770
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
771
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
772

    
773
/**
774
 * Audio Video Frame.
775
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
776
 * bumps.
777
 * Removal, reordering and changes to existing fields require a major
778
 * version bump. No fields should be added into AVFrame before or after
779
 * FF_COMMON_FRAME!
780
 * sizeof(AVFrame) must not be used outside libav*.
781
 */
782
typedef struct AVFrame {
783
    FF_COMMON_FRAME
784
} AVFrame;
785

    
786
#define DEFAULT_FRAME_RATE_BASE 1001000
787

    
788
/**
789
 * main external API structure.
790
 * New fields can be added to the end with minor version bumps.
791
 * Removal, reordering and changes to existing fields require a major
792
 * version bump.
793
 * sizeof(AVCodecContext) must not be used outside libav*.
794
 */
795
typedef struct AVCodecContext {
796
    /**
797
     * information on struct for av_log
798
     * - set by avcodec_alloc_context
799
     */
800
    const AVClass *av_class;
801
    /**
802
     * the average bitrate
803
     * - encoding: Set by user; unused for constant quantizer encoding.
804
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
805
     */
806
    int bit_rate;
807

    
808
    /**
809
     * number of bits the bitstream is allowed to diverge from the reference.
810
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
811
     * - encoding: Set by user; unused for constant quantizer encoding.
812
     * - decoding: unused
813
     */
814
    int bit_rate_tolerance;
815

    
816
    /**
817
     * CODEC_FLAG_*.
818
     * - encoding: Set by user.
819
     * - decoding: Set by user.
820
     */
821
    int flags;
822

    
823
    /**
824
     * Some codecs need additional format info. It is stored here.
825
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
826
     * specific codec MUST set it correctly otherwise stream copy breaks.
827
     * In general use of this field by muxers is not recommanded.
828
     * - encoding: Set by libavcodec.
829
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
830
     */
831
    int sub_id;
832

    
833
    /**
834
     * Motion estimation algorithm used for video coding.
835
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
836
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
837
     * - encoding: MUST be set by user.
838
     * - decoding: unused
839
     */
840
    int me_method;
841

    
842
    /**
843
     * some codecs need / can use extradata like Huffman tables.
844
     * mjpeg: Huffman tables
845
     * rv10: additional flags
846
     * mpeg4: global headers (they can be in the bitstream or here)
847
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
848
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
849
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
850
     * - encoding: Set/allocated/freed by libavcodec.
851
     * - decoding: Set/allocated/freed by user.
852
     */
853
    uint8_t *extradata;
854
    int extradata_size;
855

    
856
    /**
857
     * This is the fundamental unit of time (in seconds) in terms
858
     * of which frame timestamps are represented. For fixed-fps content,
859
     * timebase should be 1/framerate and timestamp increments should be
860
     * identically 1.
861
     * - encoding: MUST be set by user.
862
     * - decoding: Set by libavcodec.
863
     */
864
    AVRational time_base;
865

    
866
    /* video only */
867
    /**
868
     * picture width / height.
869
     * - encoding: MUST be set by user.
870
     * - decoding: Set by libavcodec.
871
     * Note: For compatibility it is possible to set this instead of
872
     * coded_width/height before decoding.
873
     */
874
    int width, height;
875

    
876
#define FF_ASPECT_EXTENDED 15
877

    
878
    /**
879
     * the number of pictures in a group of pictures, or 0 for intra_only
880
     * - encoding: Set by user.
881
     * - decoding: unused
882
     */
883
    int gop_size;
884

    
885
    /**
886
     * Pixel format, see PIX_FMT_xxx.
887
     * - encoding: Set by user.
888
     * - decoding: Set by libavcodec.
889
     */
890
    enum PixelFormat pix_fmt;
891

    
892
    /**
893
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
894
     * has to read frames at native frame rate.
895
     * - encoding: Set by user.
896
     * - decoding: unused
897
     */
898
    int rate_emu;
899

    
900
    /**
901
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
902
     * decoder to draw a horizontal band. It improves cache usage. Not
903
     * all codecs can do that. You must check the codec capabilities
904
     * beforehand.
905
     * - encoding: unused
906
     * - decoding: Set by user.
907
     * @param height the height of the slice
908
     * @param y the y position of the slice
909
     * @param type 1->top field, 2->bottom field, 3->frame
910
     * @param offset offset into the AVFrame.data from which the slice should be read
911
     */
912
    void (*draw_horiz_band)(struct AVCodecContext *s,
913
                            const AVFrame *src, int offset[4],
914
                            int y, int type, int height);
915

    
916
    /* audio only */
917
    int sample_rate; ///< samples per second
918
    int channels;
919

    
920
    /**
921
     * audio sample format
922
     * - encoding: Set by user.
923
     * - decoding: Set by libavcodec.
924
     */
925
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
926

    
927
    /* The following data should not be initialized. */
928
    /**
929
     * Samples per packet, initialized when calling 'init'.
930
     */
931
    int frame_size;
932
    int frame_number;   ///< audio or video frame number
933
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
934

    
935
    /**
936
     * Number of frames the decoded output will be delayed relative to
937
     * the encoded input.
938
     * - encoding: Set by libavcodec.
939
     * - decoding: unused
940
     */
941
    int delay;
942

    
943
    /* - encoding parameters */
944
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
945
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
946

    
947
    /**
948
     * minimum quantizer
949
     * - encoding: Set by user.
950
     * - decoding: unused
951
     */
952
    int qmin;
953

    
954
    /**
955
     * maximum quantizer
956
     * - encoding: Set by user.
957
     * - decoding: unused
958
     */
959
    int qmax;
960

    
961
    /**
962
     * maximum quantizer difference between frames
963
     * - encoding: Set by user.
964
     * - decoding: unused
965
     */
966
    int max_qdiff;
967

    
968
    /**
969
     * maximum number of B-frames between non-B-frames
970
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
971
     * - encoding: Set by user.
972
     * - decoding: unused
973
     */
974
    int max_b_frames;
975

    
976
    /**
977
     * qscale factor between IP and B-frames
978
     * - encoding: Set by user.
979
     * - decoding: unused
980
     */
981
    float b_quant_factor;
982

    
983
    /** obsolete FIXME remove */
984
    int rc_strategy;
985
#define FF_RC_STRATEGY_XVID 1
986

    
987
    int b_frame_strategy;
988

    
989
    /**
990
     * hurry up amount
991
     * - encoding: unused
992
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
993
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
994
     */
995
    int hurry_up;
996

    
997
    struct AVCodec *codec;
998

    
999
    void *priv_data;
1000

    
1001
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1002
    /* unused, FIXME remove*/
1003
    int rtp_mode;
1004
#endif
1005

    
1006
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1007
                            /* do its best to deliver a chunk with size     */
1008
                            /* below rtp_payload_size, the chunk will start */
1009
                            /* with a start code on some codecs like H.263. */
1010
                            /* This doesn't take account of any particular  */
1011
                            /* headers inside the transmitted RTP payload.  */
1012

    
1013

    
1014
    /* The RTP callback: This function is called    */
1015
    /* every time the encoder has a packet to send. */
1016
    /* It depends on the encoder if the data starts */
1017
    /* with a Start Code (it should). H.263 does.   */
1018
    /* mb_nb contains the number of macroblocks     */
1019
    /* encoded in the RTP payload.                  */
1020
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1021

    
1022
    /* statistics, used for 2-pass encoding */
1023
    int mv_bits;
1024
    int header_bits;
1025
    int i_tex_bits;
1026
    int p_tex_bits;
1027
    int i_count;
1028
    int p_count;
1029
    int skip_count;
1030
    int misc_bits;
1031

    
1032
    /**
1033
     * number of bits used for the previously encoded frame
1034
     * - encoding: Set by libavcodec.
1035
     * - decoding: unused
1036
     */
1037
    int frame_bits;
1038

    
1039
    /**
1040
     * Private data of the user, can be used to carry app specific stuff.
1041
     * - encoding: Set by user.
1042
     * - decoding: Set by user.
1043
     */
1044
    void *opaque;
1045

    
1046
    char codec_name[32];
1047
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1048
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1049

    
1050
    /**
1051
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1052
     * This is used to work around some encoder bugs.
1053
     * A demuxer should set this to what is stored in the field used to identify the codec.
1054
     * If there are multiple such fields in a container then the demuxer should choose the one
1055
     * which maximizes the information about the used codec.
1056
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1057
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1058
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1059
     * first.
1060
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1061
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1062
     */
1063
    unsigned int codec_tag;
1064

    
1065
    /**
1066
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1067
     * - encoding: Set by user
1068
     * - decoding: Set by user
1069
     */
1070
    int workaround_bugs;
1071
#define FF_BUG_AUTODETECT       1  ///< autodetection
1072
#define FF_BUG_OLD_MSMPEG4      2
1073
#define FF_BUG_XVID_ILACE       4
1074
#define FF_BUG_UMP4             8
1075
#define FF_BUG_NO_PADDING       16
1076
#define FF_BUG_AMV              32
1077
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1078
#define FF_BUG_QPEL_CHROMA      64
1079
#define FF_BUG_STD_QPEL         128
1080
#define FF_BUG_QPEL_CHROMA2     256
1081
#define FF_BUG_DIRECT_BLOCKSIZE 512
1082
#define FF_BUG_EDGE             1024
1083
#define FF_BUG_HPEL_CHROMA      2048
1084
#define FF_BUG_DC_CLIP          4096
1085
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1086
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1087

    
1088
    /**
1089
     * luma single coefficient elimination threshold
1090
     * - encoding: Set by user.
1091
     * - decoding: unused
1092
     */
1093
    int luma_elim_threshold;
1094

    
1095
    /**
1096
     * chroma single coeff elimination threshold
1097
     * - encoding: Set by user.
1098
     * - decoding: unused
1099
     */
1100
    int chroma_elim_threshold;
1101

    
1102
    /**
1103
     * strictly follow the standard (MPEG4, ...).
1104
     * - encoding: Set by user.
1105
     * - decoding: unused
1106
     */
1107
    int strict_std_compliance;
1108
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1109
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1110
#define FF_COMPLIANCE_NORMAL        0
1111
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1112
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1113

    
1114
    /**
1115
     * qscale offset between IP and B-frames
1116
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1117
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1118
     * - encoding: Set by user.
1119
     * - decoding: unused
1120
     */
1121
    float b_quant_offset;
1122

    
1123
    /**
1124
     * Error resilience; higher values will detect more errors but may
1125
     * misdetect some more or less valid parts as errors.
1126
     * - encoding: unused
1127
     * - decoding: Set by user.
1128
     */
1129
    int error_resilience;
1130
#define FF_ER_CAREFUL         1
1131
#define FF_ER_COMPLIANT       2
1132
#define FF_ER_AGGRESSIVE      3
1133
#define FF_ER_VERY_AGGRESSIVE 4
1134

    
1135
    /**
1136
     * Called at the beginning of each frame to get a buffer for it.
1137
     * If pic.reference is set then the frame will be read later by libavcodec.
1138
     * avcodec_align_dimensions() should be used to find the required width and
1139
     * height, as they normally need to be rounded up to the next multiple of 16.
1140
     * - encoding: unused
1141
     * - decoding: Set by libavcodec., user can override.
1142
     */
1143
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1144

    
1145
    /**
1146
     * Called to release buffers which were allocated with get_buffer.
1147
     * A released buffer can be reused in get_buffer().
1148
     * pic.data[*] must be set to NULL.
1149
     * - encoding: unused
1150
     * - decoding: Set by libavcodec., user can override.
1151
     */
1152
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1153

    
1154
    /**
1155
     * If 1 the stream has a 1 frame delay during decoding.
1156
     * - encoding: Set by libavcodec.
1157
     * - decoding: Set by libavcodec.
1158
     */
1159
    int has_b_frames;
1160

    
1161
    /**
1162
     * number of bytes per packet if constant and known or 0
1163
     * Used by some WAV based audio codecs.
1164
     */
1165
    int block_align;
1166

    
1167
    int parse_only; /* - decoding only: If true, only parsing is done
1168
                       (function avcodec_parse_frame()). The frame
1169
                       data is returned. Only MPEG codecs support this now. */
1170

    
1171
    /**
1172
     * 0-> h263 quant 1-> mpeg quant
1173
     * - encoding: Set by user.
1174
     * - decoding: unused
1175
     */
1176
    int mpeg_quant;
1177

    
1178
    /**
1179
     * pass1 encoding statistics output buffer
1180
     * - encoding: Set by libavcodec.
1181
     * - decoding: unused
1182
     */
1183
    char *stats_out;
1184

    
1185
    /**
1186
     * pass2 encoding statistics input buffer
1187
     * Concatenated stuff from stats_out of pass1 should be placed here.
1188
     * - encoding: Allocated/set/freed by user.
1189
     * - decoding: unused
1190
     */
1191
    char *stats_in;
1192

    
1193
    /**
1194
     * ratecontrol qmin qmax limiting method
1195
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1196
     * - encoding: Set by user.
1197
     * - decoding: unused
1198
     */
1199
    float rc_qsquish;
1200

    
1201
    float rc_qmod_amp;
1202
    int rc_qmod_freq;
1203

    
1204
    /**
1205
     * ratecontrol override, see RcOverride
1206
     * - encoding: Allocated/set/freed by user.
1207
     * - decoding: unused
1208
     */
1209
    RcOverride *rc_override;
1210
    int rc_override_count;
1211

    
1212
    /**
1213
     * rate control equation
1214
     * - encoding: Set by user
1215
     * - decoding: unused
1216
     */
1217
    const char *rc_eq;
1218

    
1219
    /**
1220
     * maximum bitrate
1221
     * - encoding: Set by user.
1222
     * - decoding: unused
1223
     */
1224
    int rc_max_rate;
1225

    
1226
    /**
1227
     * minimum bitrate
1228
     * - encoding: Set by user.
1229
     * - decoding: unused
1230
     */
1231
    int rc_min_rate;
1232

    
1233
    /**
1234
     * decoder bitstream buffer size
1235
     * - encoding: Set by user.
1236
     * - decoding: unused
1237
     */
1238
    int rc_buffer_size;
1239
    float rc_buffer_aggressivity;
1240

    
1241
    /**
1242
     * qscale factor between P and I-frames
1243
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1244
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1245
     * - encoding: Set by user.
1246
     * - decoding: unused
1247
     */
1248
    float i_quant_factor;
1249

    
1250
    /**
1251
     * qscale offset between P and I-frames
1252
     * - encoding: Set by user.
1253
     * - decoding: unused
1254
     */
1255
    float i_quant_offset;
1256

    
1257
    /**
1258
     * initial complexity for pass1 ratecontrol
1259
     * - encoding: Set by user.
1260
     * - decoding: unused
1261
     */
1262
    float rc_initial_cplx;
1263

    
1264
    /**
1265
     * DCT algorithm, see FF_DCT_* below
1266
     * - encoding: Set by user.
1267
     * - decoding: unused
1268
     */
1269
    int dct_algo;
1270
#define FF_DCT_AUTO    0
1271
#define FF_DCT_FASTINT 1
1272
#define FF_DCT_INT     2
1273
#define FF_DCT_MMX     3
1274
#define FF_DCT_MLIB    4
1275
#define FF_DCT_ALTIVEC 5
1276
#define FF_DCT_FAAN    6
1277

    
1278
    /**
1279
     * luminance masking (0-> disabled)
1280
     * - encoding: Set by user.
1281
     * - decoding: unused
1282
     */
1283
    float lumi_masking;
1284

    
1285
    /**
1286
     * temporary complexity masking (0-> disabled)
1287
     * - encoding: Set by user.
1288
     * - decoding: unused
1289
     */
1290
    float temporal_cplx_masking;
1291

    
1292
    /**
1293
     * spatial complexity masking (0-> disabled)
1294
     * - encoding: Set by user.
1295
     * - decoding: unused
1296
     */
1297
    float spatial_cplx_masking;
1298

    
1299
    /**
1300
     * p block masking (0-> disabled)
1301
     * - encoding: Set by user.
1302
     * - decoding: unused
1303
     */
1304
    float p_masking;
1305

    
1306
    /**
1307
     * darkness masking (0-> disabled)
1308
     * - encoding: Set by user.
1309
     * - decoding: unused
1310
     */
1311
    float dark_masking;
1312

    
1313

    
1314
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1315
    /* for binary compatibility */
1316
    int unused;
1317
#endif
1318

    
1319
    /**
1320
     * IDCT algorithm, see FF_IDCT_* below.
1321
     * - encoding: Set by user.
1322
     * - decoding: Set by user.
1323
     */
1324
    int idct_algo;
1325
#define FF_IDCT_AUTO          0
1326
#define FF_IDCT_INT           1
1327
#define FF_IDCT_SIMPLE        2
1328
#define FF_IDCT_SIMPLEMMX     3
1329
#define FF_IDCT_LIBMPEG2MMX   4
1330
#define FF_IDCT_PS2           5
1331
#define FF_IDCT_MLIB          6
1332
#define FF_IDCT_ARM           7
1333
#define FF_IDCT_ALTIVEC       8
1334
#define FF_IDCT_SH4           9
1335
#define FF_IDCT_SIMPLEARM     10
1336
#define FF_IDCT_H264          11
1337
#define FF_IDCT_VP3           12
1338
#define FF_IDCT_IPP           13
1339
#define FF_IDCT_XVIDMMX       14
1340
#define FF_IDCT_CAVS          15
1341
#define FF_IDCT_SIMPLEARMV5TE 16
1342
#define FF_IDCT_SIMPLEARMV6   17
1343
#define FF_IDCT_SIMPLEVIS     18
1344
#define FF_IDCT_WMV2          19
1345
#define FF_IDCT_FAAN          20
1346

    
1347
    /**
1348
     * slice count
1349
     * - encoding: Set by libavcodec.
1350
     * - decoding: Set by user (or 0).
1351
     */
1352
    int slice_count;
1353
    /**
1354
     * slice offsets in the frame in bytes
1355
     * - encoding: Set/allocated by libavcodec.
1356
     * - decoding: Set/allocated by user (or NULL).
1357
     */
1358
    int *slice_offset;
1359

    
1360
    /**
1361
     * error concealment flags
1362
     * - encoding: unused
1363
     * - decoding: Set by user.
1364
     */
1365
    int error_concealment;
1366
#define FF_EC_GUESS_MVS   1
1367
#define FF_EC_DEBLOCK     2
1368

    
1369
    /**
1370
     * dsp_mask could be add used to disable unwanted CPU features
1371
     * CPU features (i.e. MMX, SSE. ...)
1372
     *
1373
     * With the FORCE flag you may instead enable given CPU features.
1374
     * (Dangerous: Usable in case of misdetection, improper usage however will
1375
     * result into program crash.)
1376
     */
1377
    unsigned dsp_mask;
1378
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1379
    /* lower 16 bits - CPU features */
1380
#define FF_MM_MMX      0x0001 ///< standard MMX
1381
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1382
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1383
#define FF_MM_SSE      0x0008 ///< SSE functions
1384
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1385
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1386
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1387
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1388
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1389

    
1390
    /**
1391
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1392
     * - encoding: Set by libavcodec.
1393
     * - decoding: Set by user.
1394
     */
1395
     int bits_per_sample;
1396

    
1397
    /**
1398
     * prediction method (needed for huffyuv)
1399
     * - encoding: Set by user.
1400
     * - decoding: unused
1401
     */
1402
     int prediction_method;
1403
#define FF_PRED_LEFT   0
1404
#define FF_PRED_PLANE  1
1405
#define FF_PRED_MEDIAN 2
1406

    
1407
    /**
1408
     * sample aspect ratio (0 if unknown)
1409
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1410
     * - encoding: Set by user.
1411
     * - decoding: Set by libavcodec.
1412
     */
1413
    AVRational sample_aspect_ratio;
1414

    
1415
    /**
1416
     * the picture in the bitstream
1417
     * - encoding: Set by libavcodec.
1418
     * - decoding: Set by libavcodec.
1419
     */
1420
    AVFrame *coded_frame;
1421

    
1422
    /**
1423
     * debug
1424
     * - encoding: Set by user.
1425
     * - decoding: Set by user.
1426
     */
1427
    int debug;
1428
#define FF_DEBUG_PICT_INFO   1
1429
#define FF_DEBUG_RC          2
1430
#define FF_DEBUG_BITSTREAM   4
1431
#define FF_DEBUG_MB_TYPE     8
1432
#define FF_DEBUG_QP          16
1433
#define FF_DEBUG_MV          32
1434
#define FF_DEBUG_DCT_COEFF   0x00000040
1435
#define FF_DEBUG_SKIP        0x00000080
1436
#define FF_DEBUG_STARTCODE   0x00000100
1437
#define FF_DEBUG_PTS         0x00000200
1438
#define FF_DEBUG_ER          0x00000400
1439
#define FF_DEBUG_MMCO        0x00000800
1440
#define FF_DEBUG_BUGS        0x00001000
1441
#define FF_DEBUG_VIS_QP      0x00002000
1442
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1443

    
1444
    /**
1445
     * debug
1446
     * - encoding: Set by user.
1447
     * - decoding: Set by user.
1448
     */
1449
    int debug_mv;
1450
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1451
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1452
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1453

    
1454
    /**
1455
     * error
1456
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1457
     * - decoding: unused
1458
     */
1459
    uint64_t error[4];
1460

    
1461
    /**
1462
     * minimum MB quantizer
1463
     * - encoding: unused
1464
     * - decoding: unused
1465
     */
1466
    int mb_qmin;
1467

    
1468
    /**
1469
     * maximum MB quantizer
1470
     * - encoding: unused
1471
     * - decoding: unused
1472
     */
1473
    int mb_qmax;
1474

    
1475
    /**
1476
     * motion estimation comparison function
1477
     * - encoding: Set by user.
1478
     * - decoding: unused
1479
     */
1480
    int me_cmp;
1481
    /**
1482
     * subpixel motion estimation comparison function
1483
     * - encoding: Set by user.
1484
     * - decoding: unused
1485
     */
1486
    int me_sub_cmp;
1487
    /**
1488
     * macroblock comparison function (not supported yet)
1489
     * - encoding: Set by user.
1490
     * - decoding: unused
1491
     */
1492
    int mb_cmp;
1493
    /**
1494
     * interlaced DCT comparison function
1495
     * - encoding: Set by user.
1496
     * - decoding: unused
1497
     */
1498
    int ildct_cmp;
1499
#define FF_CMP_SAD    0
1500
#define FF_CMP_SSE    1
1501
#define FF_CMP_SATD   2
1502
#define FF_CMP_DCT    3
1503
#define FF_CMP_PSNR   4
1504
#define FF_CMP_BIT    5
1505
#define FF_CMP_RD     6
1506
#define FF_CMP_ZERO   7
1507
#define FF_CMP_VSAD   8
1508
#define FF_CMP_VSSE   9
1509
#define FF_CMP_NSSE   10
1510
#define FF_CMP_W53    11
1511
#define FF_CMP_W97    12
1512
#define FF_CMP_DCTMAX 13
1513
#define FF_CMP_DCT264 14
1514
#define FF_CMP_CHROMA 256
1515

    
1516
    /**
1517
     * ME diamond size & shape
1518
     * - encoding: Set by user.
1519
     * - decoding: unused
1520
     */
1521
    int dia_size;
1522

    
1523
    /**
1524
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1525
     * - encoding: Set by user.
1526
     * - decoding: unused
1527
     */
1528
    int last_predictor_count;
1529

    
1530
    /**
1531
     * prepass for motion estimation
1532
     * - encoding: Set by user.
1533
     * - decoding: unused
1534
     */
1535
    int pre_me;
1536

    
1537
    /**
1538
     * motion estimation prepass comparison function
1539
     * - encoding: Set by user.
1540
     * - decoding: unused
1541
     */
1542
    int me_pre_cmp;
1543

    
1544
    /**
1545
     * ME prepass diamond size & shape
1546
     * - encoding: Set by user.
1547
     * - decoding: unused
1548
     */
1549
    int pre_dia_size;
1550

    
1551
    /**
1552
     * subpel ME quality
1553
     * - encoding: Set by user.
1554
     * - decoding: unused
1555
     */
1556
    int me_subpel_quality;
1557

    
1558
    /**
1559
     * callback to negotiate the pixelFormat
1560
     * @param fmt is the list of formats which are supported by the codec,
1561
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1562
     * The first is always the native one.
1563
     * @return the chosen format
1564
     * - encoding: unused
1565
     * - decoding: Set by user, if not set the native format will be chosen.
1566
     */
1567
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1568

    
1569
    /**
1570
     * DTG active format information (additional aspect ratio
1571
     * information only used in DVB MPEG-2 transport streams)
1572
     * 0 if not set.
1573
     *
1574
     * - encoding: unused
1575
     * - decoding: Set by decoder.
1576
     */
1577
    int dtg_active_format;
1578
#define FF_DTG_AFD_SAME         8
1579
#define FF_DTG_AFD_4_3          9
1580
#define FF_DTG_AFD_16_9         10
1581
#define FF_DTG_AFD_14_9         11
1582
#define FF_DTG_AFD_4_3_SP_14_9  13
1583
#define FF_DTG_AFD_16_9_SP_14_9 14
1584
#define FF_DTG_AFD_SP_4_3       15
1585

    
1586
    /**
1587
     * maximum motion estimation search range in subpel units
1588
     * If 0 then no limit.
1589
     *
1590
     * - encoding: Set by user.
1591
     * - decoding: unused
1592
     */
1593
    int me_range;
1594

    
1595
    /**
1596
     * intra quantizer bias
1597
     * - encoding: Set by user.
1598
     * - decoding: unused
1599
     */
1600
    int intra_quant_bias;
1601
#define FF_DEFAULT_QUANT_BIAS 999999
1602

    
1603
    /**
1604
     * inter quantizer bias
1605
     * - encoding: Set by user.
1606
     * - decoding: unused
1607
     */
1608
    int inter_quant_bias;
1609

    
1610
    /**
1611
     * color table ID
1612
     * - encoding: unused
1613
     * - decoding: Which clrtable should be used for 8bit RGB images.
1614
     *             Tables have to be stored somewhere. FIXME
1615
     */
1616
    int color_table_id;
1617

    
1618
    /**
1619
     * internal_buffer count
1620
     * Don't touch, used by libavcodec default_get_buffer().
1621
     */
1622
    int internal_buffer_count;
1623

    
1624
    /**
1625
     * internal_buffers
1626
     * Don't touch, used by libavcodec default_get_buffer().
1627
     */
1628
    void *internal_buffer;
1629

    
1630
#define FF_LAMBDA_SHIFT 7
1631
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1632
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1633
#define FF_LAMBDA_MAX (256*128-1)
1634

    
1635
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1636
    /**
1637
     * Global quality for codecs which cannot change it per frame.
1638
     * This should be proportional to MPEG-1/2/4 qscale.
1639
     * - encoding: Set by user.
1640
     * - decoding: unused
1641
     */
1642
    int global_quality;
1643

    
1644
#define FF_CODER_TYPE_VLC       0
1645
#define FF_CODER_TYPE_AC        1
1646
#define FF_CODER_TYPE_RAW       2
1647
#define FF_CODER_TYPE_RLE       3
1648
#define FF_CODER_TYPE_DEFLATE   4
1649
    /**
1650
     * coder type
1651
     * - encoding: Set by user.
1652
     * - decoding: unused
1653
     */
1654
    int coder_type;
1655

    
1656
    /**
1657
     * context model
1658
     * - encoding: Set by user.
1659
     * - decoding: unused
1660
     */
1661
    int context_model;
1662
#if 0
1663
    /**
1664
     *
1665
     * - encoding: unused
1666
     * - decoding: Set by user.
1667
     */
1668
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1669
#endif
1670

    
1671
    /**
1672
     * slice flags
1673
     * - encoding: unused
1674
     * - decoding: Set by user.
1675
     */
1676
    int slice_flags;
1677
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1678
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1679
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1680

    
1681
    /**
1682
     * XVideo Motion Acceleration
1683
     * - encoding: forbidden
1684
     * - decoding: set by decoder
1685
     */
1686
    int xvmc_acceleration;
1687

    
1688
    /**
1689
     * macroblock decision mode
1690
     * - encoding: Set by user.
1691
     * - decoding: unused
1692
     */
1693
    int mb_decision;
1694
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1695
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1696
#define FF_MB_DECISION_RD     2        ///< rate distoration
1697

    
1698
    /**
1699
     * custom intra quantization matrix
1700
     * - encoding: Set by user, can be NULL.
1701
     * - decoding: Set by libavcodec.
1702
     */
1703
    uint16_t *intra_matrix;
1704

    
1705
    /**
1706
     * custom inter quantization matrix
1707
     * - encoding: Set by user, can be NULL.
1708
     * - decoding: Set by libavcodec.
1709
     */
1710
    uint16_t *inter_matrix;
1711

    
1712
    /**
1713
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1714
     * This is used to work around some encoder bugs.
1715
     * - encoding: unused
1716
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1717
     */
1718
    unsigned int stream_codec_tag;
1719

    
1720
    /**
1721
     * scene change detection threshold
1722
     * 0 is default, larger means fewer detected scene changes.
1723
     * - encoding: Set by user.
1724
     * - decoding: unused
1725
     */
1726
    int scenechange_threshold;
1727

    
1728
    /**
1729
     * minimum Lagrange multipler
1730
     * - encoding: Set by user.
1731
     * - decoding: unused
1732
     */
1733
    int lmin;
1734

    
1735
    /**
1736
     * maximum Lagrange multipler
1737
     * - encoding: Set by user.
1738
     * - decoding: unused
1739
     */
1740
    int lmax;
1741

    
1742
    /**
1743
     * palette control structure
1744
     * - encoding: ??? (no palette-enabled encoder yet)
1745
     * - decoding: Set by user.
1746
     */
1747
    struct AVPaletteControl *palctrl;
1748

    
1749
    /**
1750
     * noise reduction strength
1751
     * - encoding: Set by user.
1752
     * - decoding: unused
1753
     */
1754
    int noise_reduction;
1755

    
1756
    /**
1757
     * Called at the beginning of a frame to get cr buffer for it.
1758
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1759
     * libavcodec will pass previous buffer in pic, function should return
1760
     * same buffer or new buffer with old frame "painted" into it.
1761
     * If pic.data[0] == NULL must behave like get_buffer().
1762
     * - encoding: unused
1763
     * - decoding: Set by libavcodec., user can override
1764
     */
1765
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1766

    
1767
    /**
1768
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1769
     * - encoding: Set by user.
1770
     * - decoding: unused
1771
     */
1772
    int rc_initial_buffer_occupancy;
1773

    
1774
    /**
1775
     *
1776
     * - encoding: Set by user.
1777
     * - decoding: unused
1778
     */
1779
    int inter_threshold;
1780

    
1781
    /**
1782
     * CODEC_FLAG2_*
1783
     * - encoding: Set by user.
1784
     * - decoding: Set by user.
1785
     */
1786
    int flags2;
1787

    
1788
    /**
1789
     * Simulates errors in the bitstream to test error concealment.
1790
     * - encoding: Set by user.
1791
     * - decoding: unused
1792
     */
1793
    int error_rate;
1794

    
1795
    /**
1796
     * MP3 antialias algorithm, see FF_AA_* below.
1797
     * - encoding: unused
1798
     * - decoding: Set by user.
1799
     */
1800
    int antialias_algo;
1801
#define FF_AA_AUTO    0
1802
#define FF_AA_FASTINT 1 //not implemented yet
1803
#define FF_AA_INT     2
1804
#define FF_AA_FLOAT   3
1805
    /**
1806
     * quantizer noise shaping
1807
     * - encoding: Set by user.
1808
     * - decoding: unused
1809
     */
1810
    int quantizer_noise_shaping;
1811

    
1812
    /**
1813
     * thread count
1814
     * is used to decide how many independent tasks should be passed to execute()
1815
     * - encoding: Set by user.
1816
     * - decoding: Set by user.
1817
     */
1818
    int thread_count;
1819

    
1820
    /**
1821
     * The codec may call this to execute several independent things.
1822
     * It will return only after finishing all tasks.
1823
     * The user may replace this with some multithreaded implementation,
1824
     * the default implementation will execute the parts serially.
1825
     * @param count the number of things to execute
1826
     * - encoding: Set by libavcodec, user can override.
1827
     * - decoding: Set by libavcodec, user can override.
1828
     */
1829
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1830

    
1831
    /**
1832
     * thread opaque
1833
     * Can be used by execute() to store some per AVCodecContext stuff.
1834
     * - encoding: set by execute()
1835
     * - decoding: set by execute()
1836
     */
1837
    void *thread_opaque;
1838

    
1839
    /**
1840
     * Motion estimation threshold below which no motion estimation is
1841
     * performed, but instead the user specified motion vectors are used.
1842
     *
1843
     * - encoding: Set by user.
1844
     * - decoding: unused
1845
     */
1846
     int me_threshold;
1847

    
1848
    /**
1849
     * Macroblock threshold below which the user specified macroblock types will be used.
1850
     * - encoding: Set by user.
1851
     * - decoding: unused
1852
     */
1853
     int mb_threshold;
1854

    
1855
    /**
1856
     * precision of the intra DC coefficient - 8
1857
     * - encoding: Set by user.
1858
     * - decoding: unused
1859
     */
1860
     int intra_dc_precision;
1861

    
1862
    /**
1863
     * noise vs. sse weight for the nsse comparsion function
1864
     * - encoding: Set by user.
1865
     * - decoding: unused
1866
     */
1867
     int nsse_weight;
1868

    
1869
    /**
1870
     * Number of macroblock rows at the top which are skipped.
1871
     * - encoding: unused
1872
     * - decoding: Set by user.
1873
     */
1874
     int skip_top;
1875

    
1876
    /**
1877
     * Number of macroblock rows at the bottom which are skipped.
1878
     * - encoding: unused
1879
     * - decoding: Set by user.
1880
     */
1881
     int skip_bottom;
1882

    
1883
    /**
1884
     * profile
1885
     * - encoding: Set by user.
1886
     * - decoding: Set by libavcodec.
1887
     */
1888
     int profile;
1889
#define FF_PROFILE_UNKNOWN -99
1890
#define FF_PROFILE_AAC_MAIN 0
1891
#define FF_PROFILE_AAC_LOW  1
1892
#define FF_PROFILE_AAC_SSR  2
1893
#define FF_PROFILE_AAC_LTP  3
1894

    
1895
    /**
1896
     * level
1897
     * - encoding: Set by user.
1898
     * - decoding: Set by libavcodec.
1899
     */
1900
     int level;
1901
#define FF_LEVEL_UNKNOWN -99
1902

    
1903
    /**
1904
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1905
     * - encoding: unused
1906
     * - decoding: Set by user.
1907
     */
1908
     int lowres;
1909

    
1910
    /**
1911
     * Bitstream width / height, may be different from width/height if lowres
1912
     * or other things are used.
1913
     * - encoding: unused
1914
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1915
     */
1916
    int coded_width, coded_height;
1917

    
1918
    /**
1919
     * frame skip threshold
1920
     * - encoding: Set by user.
1921
     * - decoding: unused
1922
     */
1923
    int frame_skip_threshold;
1924

    
1925
    /**
1926
     * frame skip factor
1927
     * - encoding: Set by user.
1928
     * - decoding: unused
1929
     */
1930
    int frame_skip_factor;
1931

    
1932
    /**
1933
     * frame skip exponent
1934
     * - encoding: Set by user.
1935
     * - decoding: unused
1936
     */
1937
    int frame_skip_exp;
1938

    
1939
    /**
1940
     * frame skip comparison function
1941
     * - encoding: Set by user.
1942
     * - decoding: unused
1943
     */
1944
    int frame_skip_cmp;
1945

    
1946
    /**
1947
     * Border processing masking, raises the quantizer for mbs on the borders
1948
     * of the picture.
1949
     * - encoding: Set by user.
1950
     * - decoding: unused
1951
     */
1952
    float border_masking;
1953

    
1954
    /**
1955
     * minimum MB lagrange multipler
1956
     * - encoding: Set by user.
1957
     * - decoding: unused
1958
     */
1959
    int mb_lmin;
1960

    
1961
    /**
1962
     * maximum MB lagrange multipler
1963
     * - encoding: Set by user.
1964
     * - decoding: unused
1965
     */
1966
    int mb_lmax;
1967

    
1968
    /**
1969
     *
1970
     * - encoding: Set by user.
1971
     * - decoding: unused
1972
     */
1973
    int me_penalty_compensation;
1974

    
1975
    /**
1976
     *
1977
     * - encoding: unused
1978
     * - decoding: Set by user.
1979
     */
1980
    enum AVDiscard skip_loop_filter;
1981

    
1982
    /**
1983
     *
1984
     * - encoding: unused
1985
     * - decoding: Set by user.
1986
     */
1987
    enum AVDiscard skip_idct;
1988

    
1989
    /**
1990
     *
1991
     * - encoding: unused
1992
     * - decoding: Set by user.
1993
     */
1994
    enum AVDiscard skip_frame;
1995

    
1996
    /**
1997
     *
1998
     * - encoding: Set by user.
1999
     * - decoding: unused
2000
     */
2001
    int bidir_refine;
2002

    
2003
    /**
2004
     *
2005
     * - encoding: Set by user.
2006
     * - decoding: unused
2007
     */
2008
    int brd_scale;
2009

    
2010
    /**
2011
     * constant rate factor - quality-based VBR - values ~correspond to qps
2012
     * - encoding: Set by user.
2013
     * - decoding: unused
2014
     */
2015
    float crf;
2016

    
2017
    /**
2018
     * constant quantization parameter rate control method
2019
     * - encoding: Set by user.
2020
     * - decoding: unused
2021
     */
2022
    int cqp;
2023

    
2024
    /**
2025
     * minimum GOP size
2026
     * - encoding: Set by user.
2027
     * - decoding: unused
2028
     */
2029
    int keyint_min;
2030

    
2031
    /**
2032
     * number of reference frames
2033
     * - encoding: Set by user.
2034
     * - decoding: unused
2035
     */
2036
    int refs;
2037

    
2038
    /**
2039
     * chroma qp offset from luma
2040
     * - encoding: Set by user.
2041
     * - decoding: unused
2042
     */
2043
    int chromaoffset;
2044

    
2045
    /**
2046
     * Influences how often B-frames are used.
2047
     * - encoding: Set by user.
2048
     * - decoding: unused
2049
     */
2050
    int bframebias;
2051

    
2052
    /**
2053
     * trellis RD quantization
2054
     * - encoding: Set by user.
2055
     * - decoding: unused
2056
     */
2057
    int trellis;
2058

    
2059
    /**
2060
     * Reduce fluctuations in qp (before curve compression).
2061
     * - encoding: Set by user.
2062
     * - decoding: unused
2063
     */
2064
    float complexityblur;
2065

    
2066
    /**
2067
     * in-loop deblocking filter alphac0 parameter
2068
     * alpha is in the range -6...6
2069
     * - encoding: Set by user.
2070
     * - decoding: unused
2071
     */
2072
    int deblockalpha;
2073

    
2074
    /**
2075
     * in-loop deblocking filter beta parameter
2076
     * beta is in the range -6...6
2077
     * - encoding: Set by user.
2078
     * - decoding: unused
2079
     */
2080
    int deblockbeta;
2081

    
2082
    /**
2083
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2084
     * - encoding: Set by user.
2085
     * - decoding: unused
2086
     */
2087
    int partitions;
2088
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2089
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2090
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2091
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2092
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2093

    
2094
    /**
2095
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2096
     * - encoding: Set by user.
2097
     * - decoding: unused
2098
     */
2099
    int directpred;
2100

    
2101
    /**
2102
     * Audio cutoff bandwidth (0 means "automatic")
2103
     * - encoding: Set by user.
2104
     * - decoding: unused
2105
     */
2106
    int cutoff;
2107

    
2108
    /**
2109
     * Multiplied by qscale for each frame and added to scene_change_score.
2110
     * - encoding: Set by user.
2111
     * - decoding: unused
2112
     */
2113
    int scenechange_factor;
2114

    
2115
    /**
2116
     *
2117
     * Note: Value depends upon the compare function used for fullpel ME.
2118
     * - encoding: Set by user.
2119
     * - decoding: unused
2120
     */
2121
    int mv0_threshold;
2122

    
2123
    /**
2124
     * Adjusts sensitivity of b_frame_strategy 1.
2125
     * - encoding: Set by user.
2126
     * - decoding: unused
2127
     */
2128
    int b_sensitivity;
2129

    
2130
    /**
2131
     * - encoding: Set by user.
2132
     * - decoding: unused
2133
     */
2134
    int compression_level;
2135
#define FF_COMPRESSION_DEFAULT -1
2136

    
2137
    /**
2138
     * Sets whether to use LPC mode - used by FLAC encoder.
2139
     * - encoding: Set by user.
2140
     * - decoding: unused
2141
     */
2142
    int use_lpc;
2143

    
2144
    /**
2145
     * LPC coefficient precision - used by FLAC encoder
2146
     * - encoding: Set by user.
2147
     * - decoding: unused
2148
     */
2149
    int lpc_coeff_precision;
2150

    
2151
    /**
2152
     * - encoding: Set by user.
2153
     * - decoding: unused
2154
     */
2155
    int min_prediction_order;
2156

    
2157
    /**
2158
     * - encoding: Set by user.
2159
     * - decoding: unused
2160
     */
2161
    int max_prediction_order;
2162

    
2163
    /**
2164
     * search method for selecting prediction order
2165
     * - encoding: Set by user.
2166
     * - decoding: unused
2167
     */
2168
    int prediction_order_method;
2169

    
2170
    /**
2171
     * - encoding: Set by user.
2172
     * - decoding: unused
2173
     */
2174
    int min_partition_order;
2175

    
2176
    /**
2177
     * - encoding: Set by user.
2178
     * - decoding: unused
2179
     */
2180
    int max_partition_order;
2181

    
2182
    /**
2183
     * GOP timecode frame start number, in non drop frame format
2184
     * - encoding: Set by user.
2185
     * - decoding: unused
2186
     */
2187
    int64_t timecode_frame_start;
2188

    
2189
    /**
2190
     * Decoder should decode to this many channels if it can (0 for default)
2191
     * - encoding: unused
2192
     * - decoding: Set by user.
2193
     */
2194
    int request_channels;
2195

    
2196
    /**
2197
     * Percentage of dynamic range compression to be applied by the decoder.
2198
     * The default value is 1.0, corresponding to full compression.
2199
     * - encoding: unused
2200
     * - decoding: Set by user.
2201
     */
2202
    float drc_scale;
2203
} AVCodecContext;
2204

    
2205
/**
2206
 * AVCodec.
2207
 */
2208
typedef struct AVCodec {
2209
    /**
2210
     * Name of the codec implementation.
2211
     * The name is globally unique among encoders and among decoders (but an
2212
     * encoder and a decoder can share the same name).
2213
     * This is the primary way to find a codec from the user perspective.
2214
     */
2215
    const char *name;
2216
    enum CodecType type;
2217
    enum CodecID id;
2218
    int priv_data_size;
2219
    int (*init)(AVCodecContext *);
2220
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2221
    int (*close)(AVCodecContext *);
2222
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2223
                  const uint8_t *buf, int buf_size);
2224
    /**
2225
     * Codec capabilities.
2226
     * see CODEC_CAP_*
2227
     */
2228
    int capabilities;
2229
    struct AVCodec *next;
2230
    /**
2231
     * Flush buffers.
2232
     * Will be called when seeking
2233
     */
2234
    void (*flush)(AVCodecContext *);
2235
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2236
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2237
} AVCodec;
2238

    
2239
/**
2240
 * four components are given, that's all.
2241
 * the last component is alpha
2242
 */
2243
typedef struct AVPicture {
2244
    uint8_t *data[4];
2245
    int linesize[4];       ///< number of bytes per line
2246
} AVPicture;
2247

    
2248
/**
2249
 * AVPaletteControl
2250
 * This structure defines a method for communicating palette changes
2251
 * between and demuxer and a decoder.
2252
 *
2253
 * @deprecated Use AVPacket to send palette changes instead.
2254
 * This is totally broken.
2255
 */
2256
#define AVPALETTE_SIZE 1024
2257
#define AVPALETTE_COUNT 256
2258
typedef struct AVPaletteControl {
2259

    
2260
    /* Demuxer sets this to 1 to indicate the palette has changed;
2261
     * decoder resets to 0. */
2262
    int palette_changed;
2263

    
2264
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2265
     * the individual palette components should be on a 8-bit scale; if
2266
     * the palette data comes from an IBM VGA native format, the component
2267
     * data is probably 6 bits in size and needs to be scaled. */
2268
    unsigned int palette[AVPALETTE_COUNT];
2269

    
2270
} AVPaletteControl attribute_deprecated;
2271

    
2272
typedef struct AVSubtitleRect {
2273
    uint16_t x;
2274
    uint16_t y;
2275
    uint16_t w;
2276
    uint16_t h;
2277
    uint16_t nb_colors;
2278
    int linesize;
2279
    uint32_t *rgba_palette;
2280
    uint8_t *bitmap;
2281
} AVSubtitleRect;
2282

    
2283
typedef struct AVSubtitle {
2284
    uint16_t format; /* 0 = graphics */
2285
    uint32_t start_display_time; /* relative to packet pts, in ms */
2286
    uint32_t end_display_time; /* relative to packet pts, in ms */
2287
    uint32_t num_rects;
2288
    AVSubtitleRect *rects;
2289
} AVSubtitle;
2290

    
2291

    
2292
/* resample.c */
2293

    
2294
struct ReSampleContext;
2295
struct AVResampleContext;
2296

    
2297
typedef struct ReSampleContext ReSampleContext;
2298

    
2299
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2300
                                     int output_rate, int input_rate);
2301
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2302
void audio_resample_close(ReSampleContext *s);
2303

    
2304
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2305
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2306
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2307
void av_resample_close(struct AVResampleContext *c);
2308

    
2309
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2310
/* YUV420 format is assumed ! */
2311

    
2312
/**
2313
 * @deprecated Use the software scaler (swscale) instead.
2314
 */
2315
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2316

    
2317
/**
2318
 * @deprecated Use the software scaler (swscale) instead.
2319
 */
2320
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2321
                                      int input_width, int input_height);
2322

    
2323
/**
2324
 * @deprecated Use the software scaler (swscale) instead.
2325
 */
2326
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2327
                                      int iwidth, int iheight,
2328
                                      int topBand, int bottomBand,
2329
                                      int leftBand, int rightBand,
2330
                                      int padtop, int padbottom,
2331
                                      int padleft, int padright);
2332

    
2333
/**
2334
 * @deprecated Use the software scaler (swscale) instead.
2335
 */
2336
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2337
                  AVPicture *output, const AVPicture *input);
2338

    
2339
/**
2340
 * @deprecated Use the software scaler (swscale) instead.
2341
 */
2342
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2343

    
2344
#endif
2345

    
2346
/**
2347
 * Allocate memory for a picture.  Call avpicture_free to free it.
2348
 *
2349
 * @param picture the picture to be filled in
2350
 * @param pix_fmt the format of the picture
2351
 * @param width the width of the picture
2352
 * @param height the height of the picture
2353
 * @return zero if successful, a negative value if not
2354
 */
2355
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2356

    
2357
/**
2358
 * Free a picture previously allocated by avpicture_alloc().
2359
 *
2360
 * @param picture the AVPicture to be freed
2361
 */
2362
void avpicture_free(AVPicture *picture);
2363

    
2364
/**
2365
 * Fill in the AVPicture fields.
2366
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2367
 * which points to the image data buffer. Depending on the specified picture
2368
 * format, one or multiple image data pointers and line sizes will be set.
2369
 * If a planar format is specified, several pointers will be set pointing to
2370
 * the different picture planes and the line sizes of the different planes
2371
 * will be stored in the lines_sizes array.
2372
 *
2373
 * @param picture AVPicture whose fields are to be filled in
2374
 * @param ptr Buffer which will contain or contains the actual image data
2375
 * @param pix_fmt The format in which the picture data is stored.
2376
 * @param width the width of the image in pixels
2377
 * @param height the height of the image in pixels
2378
 * @return size of the image data in bytes
2379
 */
2380
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2381
                   int pix_fmt, int width, int height);
2382
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2383
                     unsigned char *dest, int dest_size);
2384

    
2385
/**
2386
 * Calculate the size in bytes that a picture of the given width and height
2387
 * would occupy if stored in the given picture format.
2388
 *
2389
 * @param pix_fmt the given picture format
2390
 * @param width the width of the image
2391
 * @param height the height of the image
2392
 * @return Image data size in bytes
2393
 */
2394
int avpicture_get_size(int pix_fmt, int width, int height);
2395
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2396
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2397
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2398
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2399
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2400

    
2401
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2402
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2403
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2404
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2405
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2406
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2407

    
2408
/**
2409
 * Computes what kind of losses will occur when converting from one specific
2410
 * pixel format to another.
2411
 * When converting from one pixel format to another, information loss may occur.
2412
 * For example, when converting from RGB24 to GRAY, the color information will
2413
 * be lost. Similarly, other losses occur when converting from some formats to
2414
 * other formats. These losses can involve loss of chroma, but also loss of
2415
 * resolution, loss of color depth, loss due to the color space conversion, loss
2416
 * of the alpha bits or loss due to color quantization.
2417
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2418
 * which will occur when converting from one pixel format to another.
2419
 *
2420
 * @param[in] dst_pix_fmt destination pixel format
2421
 * @param[in] src_pix_fmt source pixel format
2422
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2423
 * @return Combination of flags informing you what kind of losses will occur.
2424
 */
2425
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2426
                             int has_alpha);
2427

    
2428
/**
2429
 * Finds the best pixel format to convert to given a certain source pixel
2430
 * format.  When converting from one pixel format to another, information loss
2431
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2432
 * information will be lost. Similarly, other losses occur when converting from
2433
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2434
 * the given pixel formats should be used to suffer the least amount of loss.
2435
 * The pixel formats from which it chooses one, are determined by the
2436
 * \p pix_fmt_mask parameter.
2437
 *
2438
 * @code
2439
 * src_pix_fmt = PIX_FMT_YUV420P;
2440
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2441
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2442
 * @endcode
2443
 *
2444
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2445
 * @param[in] src_pix_fmt source pixel format
2446
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2447
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2448
 * @return The best pixel format to convert to or -1 if none was found.
2449
 */
2450
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2451
                              int has_alpha, int *loss_ptr);
2452

    
2453

    
2454
/**
2455
 * Print in buf the string corresponding to the pixel format with
2456
 * number pix_fmt, or an header if pix_fmt is negative.
2457
 *
2458
 * @param[in] buf the buffer where to write the string
2459
 * @param[in] buf_size the size of buf
2460
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2461
 * a negative value to print the corresponding header.
2462
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2463
 */
2464
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2465

    
2466
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2467
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2468

    
2469
/**
2470
 * Tell if an image really has transparent alpha values.
2471
 * @return ored mask of FF_ALPHA_xxx constants
2472
 */
2473
int img_get_alpha_info(const AVPicture *src,
2474
                       int pix_fmt, int width, int height);
2475

    
2476
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2477
/**
2478
 * convert among pixel formats
2479
 * @deprecated Use the software scaler (swscale) instead.
2480
 */
2481
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2482
                const AVPicture *src, int pix_fmt,
2483
                int width, int height);
2484
#endif
2485

    
2486
/* deinterlace a picture */
2487
/* deinterlace - if not supported return -1 */
2488
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2489
                          int pix_fmt, int width, int height);
2490

    
2491
/* external high level API */
2492

    
2493
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2494
extern AVCodec *first_avcodec;
2495
#endif
2496
AVCodec *av_codec_next(AVCodec *c);
2497

    
2498
/* returns LIBAVCODEC_VERSION_INT constant */
2499
unsigned avcodec_version(void);
2500
/* returns LIBAVCODEC_BUILD constant */
2501
unsigned avcodec_build(void);
2502

    
2503
/**
2504
 * Initializes libavcodec.
2505
 *
2506
 * @warning This function \e must be called before any other libavcodec
2507
 * function.
2508
 */
2509
void avcodec_init(void);
2510

    
2511
void register_avcodec(AVCodec *format);
2512

    
2513
/**
2514
 * Finds a registered encoder with a matching codec ID.
2515
 *
2516
 * @param id CodecID of the requested encoder
2517
 * @return An encoder if one was found, NULL otherwise.
2518
 */
2519
AVCodec *avcodec_find_encoder(enum CodecID id);
2520

    
2521
/**
2522
 * Finds a registered encoder with the specified name.
2523
 *
2524
 * @param name name of the requested encoder
2525
 * @return An encoder if one was found, NULL otherwise.
2526
 */
2527
AVCodec *avcodec_find_encoder_by_name(const char *name);
2528

    
2529
/**
2530
 * Finds a registered decoder with a matching codec ID.
2531
 *
2532
 * @param id CodecID of the requested decoder
2533
 * @return A decoder if one was found, NULL otherwise.
2534
 */
2535
AVCodec *avcodec_find_decoder(enum CodecID id);
2536

    
2537
/**
2538
 * Finds a registered decoder with the specified name.
2539
 *
2540
 * @param name name of the requested decoder
2541
 * @return A decoder if one was found, NULL otherwise.
2542
 */
2543
AVCodec *avcodec_find_decoder_by_name(const char *name);
2544
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2545

    
2546
/**
2547
 * Sets the fields of the given AVCodecContext to default values.
2548
 *
2549
 * @param s The AVCodecContext of which the fields should be set to default values.
2550
 */
2551
void avcodec_get_context_defaults(AVCodecContext *s);
2552

    
2553
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2554
 *  we WILL change its arguments and name a few times! */
2555
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2556

    
2557
/**
2558
 * Allocates an AVCodecContext and sets its fields to default values.  The
2559
 * resulting struct can be deallocated by simply calling av_free().
2560
 *
2561
 * @return An AVCodecContext filled with default values or NULL on failure.
2562
 * @see avcodec_get_context_defaults
2563
 */
2564
AVCodecContext *avcodec_alloc_context(void);
2565

    
2566
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2567
 *  we WILL change its arguments and name a few times! */
2568
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2569

    
2570
/**
2571
 * Sets the fields of the given AVFrame to default values.
2572
 *
2573
 * @param pic The AVFrame of which the fields should be set to default values.
2574
 */
2575
void avcodec_get_frame_defaults(AVFrame *pic);
2576

    
2577
/**
2578
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2579
 * struct can be deallocated by simply calling av_free().
2580
 *
2581
 * @return An AVFrame filled with default values or NULL on failure.
2582
 * @see avcodec_get_frame_defaults
2583
 */
2584
AVFrame *avcodec_alloc_frame(void);
2585

    
2586
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2587
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2588
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2589
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2590

    
2591
/**
2592
 * Checks if the given dimension of a picture is valid, meaning that all
2593
 * bytes of the picture can be addressed with a signed int.
2594
 *
2595
 * @param[in] w Width of the picture.
2596
 * @param[in] h Height of the picture.
2597
 * @return Zero if valid, a negative value if invalid.
2598
 */
2599
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2600
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2601

    
2602
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2603
void avcodec_thread_free(AVCodecContext *s);
2604
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2605
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2606
//FIXME func typedef
2607

    
2608
/**
2609
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2610
 * function the context has to be allocated.
2611
 *
2612
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2613
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2614
 * retrieving a codec.
2615
 *
2616
 * @warning This function is not thread safe!
2617
 *
2618
 * @code
2619
 * avcodec_register_all();
2620
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2621
 * if (!codec)
2622
 *     exit(1);
2623
 *
2624
 * context = avcodec_alloc_context();
2625
 *
2626
 * if (avcodec_open(context, codec) < 0)
2627
 *     exit(1);
2628
 * @endcode
2629
 *
2630
 * @param avctx The context which will be set up to use the given codec.
2631
 * @param codec The codec to use within the context.
2632
 * @return zero on success, a negative value on error
2633
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2634
 */
2635
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2636

    
2637
/**
2638
 * @deprecated Use avcodec_decode_audio2() instead.
2639
 */
2640
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2641
                         int *frame_size_ptr,
2642
                         const uint8_t *buf, int buf_size);
2643

    
2644
/**
2645
 * Decodes an audio frame from \p buf into \p samples.
2646
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2647
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2648
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2649
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2650
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2651
 * decompressed frame size in \e bytes.
2652
 *
2653
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2654
 * output buffer before calling avcodec_decode_audio2().
2655
 *
2656
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2657
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2658
 * bits at once and could read over the end.
2659
 *
2660
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2661
 * no overreading happens for damaged MPEG streams.
2662
 *
2663
 * @note You might have to align the input buffer \p buf and output buffer \p
2664
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2665
 * necessary at all, on others it won't work at all if not aligned and on others
2666
 * it will work but it will have an impact on performance. In practice, the
2667
 * bitstream should have 4 byte alignment at minimum and all sample data should
2668
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2669
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2670
 * start of the buffer to 16.
2671
 *
2672
 * @param avctx the codec context
2673
 * @param[out] samples the output buffer
2674
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2675
 * @param[in] buf the input buffer
2676
 * @param[in] buf_size the input buffer size in bytes
2677
 * @return On error a negative value is returned, otherwise the number of bytes
2678
 * used or zero if no frame could be decompressed.
2679
 */
2680
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2681
                         int *frame_size_ptr,
2682
                         const uint8_t *buf, int buf_size);
2683

    
2684
/**
2685
 * Decodes a video frame from \p buf into \p picture.
2686
 * The avcodec_decode_video() function decodes a video frame from the input
2687
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2688
 * video codec which was coupled with \p avctx using avcodec_open(). The
2689
 * resulting decoded frame is stored in \p picture.
2690
 *
2691
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2692
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2693
 * bits at once and could read over the end.
2694
 *
2695
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2696
 * no overreading happens for damaged MPEG streams.
2697
 *
2698
 * @note You might have to align the input buffer \p buf and output buffer \p
2699
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2700
 * necessary at all, on others it won't work at all if not aligned and on others
2701
 * it will work but it will have an impact on performance. In practice, the
2702
 * bitstream should have 4 byte alignment at minimum and all sample data should
2703
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2704
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2705
 * start of the buffer to 16.
2706
 *
2707
 * @param avctx the codec context
2708
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2709
 * @param[in] buf the input buffer
2710
 * @param[in] buf_size the size of the input buffer in bytes
2711
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2712
 * @return On error a negative value is returned, otherwise the number of bytes
2713
 * used or zero if no frame could be decompressed.
2714
 */
2715
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2716
                         int *got_picture_ptr,
2717
                         const uint8_t *buf, int buf_size);
2718

    
2719
/* Decode a subtitle message. Return -1 if error, otherwise return the
2720
 * number of bytes used. If no subtitle could be decompressed,
2721
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2722
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2723
                            int *got_sub_ptr,
2724
                            const uint8_t *buf, int buf_size);
2725
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2726
                        int *data_size_ptr,
2727
                        uint8_t *buf, int buf_size);
2728

    
2729
/**
2730
 * Encodes an audio frame from \p samples into \p buf.
2731
 * The avcodec_encode_audio() function encodes an audio frame from the input
2732
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2733
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2734
 * stored in output buffer \p buf.
2735
 *
2736
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2737
 *
2738
 * @param avctx the codec context
2739
 * @param[out] buf the output buffer
2740
 * @param[in] buf_size the output buffer size
2741
 * @param[in] samples the input buffer containing the samples
2742
 * The number of samples read from this buffer is frame_size*channels,
2743
 * both of which are defined in \p avctx.
2744
 * @return On error a negative value is returned, on success zero or the number
2745
 * of bytes used to encode the data read from the input buffer.
2746
 */
2747
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2748
                         const short *samples);
2749

    
2750
/**
2751
 * Encodes a video frame from \p pict into \p buf.
2752
 * The avcodec_encode_video() function encodes a video frame from the input
2753
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2754
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2755
 * frame are stored in the output buffer \p buf. The input picture should be
2756
 * stored using a specific format, namely \c avctx.pix_fmt.
2757
 *
2758
 * @param avctx the codec context
2759
 * @param[out] buf the output buffer for the bitstream of encoded frame
2760
 * @param[in] buf_size the size of the output buffer in bytes
2761
 * @param[in] pict the input picture to encode
2762
 * @return On error a negative value is returned, on success zero or the number
2763
 * of bytes used from the input buffer.
2764
 */
2765
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2766
                         const AVFrame *pict);
2767
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2768
                            const AVSubtitle *sub);
2769

    
2770
int avcodec_close(AVCodecContext *avctx);
2771

    
2772
void avcodec_register_all(void);
2773

    
2774
/**
2775
 * Flush buffers, should be called when seeking or when switching to a different stream.
2776
 */
2777
void avcodec_flush_buffers(AVCodecContext *avctx);
2778

    
2779
void avcodec_default_free_buffers(AVCodecContext *s);
2780

    
2781
/* misc useful functions */
2782

    
2783
/**
2784
 * Returns a single letter to describe the given picture type \p pict_type.
2785
 *
2786
 * @param[in] pict_type the picture type
2787
 * @return A single character representing the picture type.
2788
 */
2789
char av_get_pict_type_char(int pict_type);
2790

    
2791
/**
2792
 * Returns codec bits per sample.
2793
 *
2794
 * @param[in] codec_id the codec
2795
 * @return Number of bits per sample or zero if unknown for the given codec.
2796
 */
2797
int av_get_bits_per_sample(enum CodecID codec_id);
2798

    
2799
/**
2800
 * Returns sample format bits per sample.
2801
 *
2802
 * @param[in] sample_fmt the sample format
2803
 * @return Number of bits per sample or zero if unknown for the given sample format.
2804
 */
2805
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2806

    
2807
/* frame parsing */
2808
typedef struct AVCodecParserContext {
2809
    void *priv_data;
2810
    struct AVCodecParser *parser;
2811
    int64_t frame_offset; /* offset of the current frame */
2812
    int64_t cur_offset; /* current offset
2813
                           (incremented by each av_parser_parse()) */
2814
    int64_t last_frame_offset; /* offset of the last frame */
2815
    /* video info */
2816
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2817
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2818
    int64_t pts;     /* pts of the current frame */
2819
    int64_t dts;     /* dts of the current frame */
2820

    
2821
    /* private data */
2822
    int64_t last_pts;
2823
    int64_t last_dts;
2824
    int fetch_timestamp;
2825

    
2826
#define AV_PARSER_PTS_NB 4
2827
    int cur_frame_start_index;
2828
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2829
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2830
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2831

    
2832
    int flags;
2833
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2834

    
2835
    int64_t offset;      ///< byte offset from starting packet start
2836
    int64_t last_offset;
2837
} AVCodecParserContext;
2838

    
2839
typedef struct AVCodecParser {
2840
    int codec_ids[5]; /* several codec IDs are permitted */
2841
    int priv_data_size;
2842
    int (*parser_init)(AVCodecParserContext *s);
2843
    int (*parser_parse)(AVCodecParserContext *s,
2844
                        AVCodecContext *avctx,
2845
                        const uint8_t **poutbuf, int *poutbuf_size,
2846
                        const uint8_t *buf, int buf_size);
2847
    void (*parser_close)(AVCodecParserContext *s);
2848
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2849
    struct AVCodecParser *next;
2850
} AVCodecParser;
2851

    
2852
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2853
extern AVCodecParser *av_first_parser;
2854
#endif
2855
AVCodecParser *av_parser_next(AVCodecParser *c);
2856

    
2857
void av_register_codec_parser(AVCodecParser *parser);
2858
AVCodecParserContext *av_parser_init(int codec_id);
2859
int av_parser_parse(AVCodecParserContext *s,
2860
                    AVCodecContext *avctx,
2861
                    uint8_t **poutbuf, int *poutbuf_size,
2862
                    const uint8_t *buf, int buf_size,
2863
                    int64_t pts, int64_t dts);
2864
int av_parser_change(AVCodecParserContext *s,
2865
                     AVCodecContext *avctx,
2866
                     uint8_t **poutbuf, int *poutbuf_size,
2867
                     const uint8_t *buf, int buf_size, int keyframe);
2868
void av_parser_close(AVCodecParserContext *s);
2869

    
2870

    
2871
typedef struct AVBitStreamFilterContext {
2872
    void *priv_data;
2873
    struct AVBitStreamFilter *filter;
2874
    AVCodecParserContext *parser;
2875
    struct AVBitStreamFilterContext *next;
2876
} AVBitStreamFilterContext;
2877

    
2878

    
2879
typedef struct AVBitStreamFilter {
2880
    const char *name;
2881
    int priv_data_size;
2882
    int (*filter)(AVBitStreamFilterContext *bsfc,
2883
                  AVCodecContext *avctx, const char *args,
2884
                  uint8_t **poutbuf, int *poutbuf_size,
2885
                  const uint8_t *buf, int buf_size, int keyframe);
2886
    void (*close)(AVBitStreamFilterContext *bsfc);
2887
    struct AVBitStreamFilter *next;
2888
} AVBitStreamFilter;
2889

    
2890
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2891
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2892
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2893
                               AVCodecContext *avctx, const char *args,
2894
                               uint8_t **poutbuf, int *poutbuf_size,
2895
                               const uint8_t *buf, int buf_size, int keyframe);
2896
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2897

    
2898
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2899

    
2900
/* memory */
2901

    
2902
/**
2903
 * Reallocates the given block if it is not large enough, otherwise it
2904
 * does nothing.
2905
 *
2906
 * @see av_realloc
2907
 */
2908
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2909

    
2910
/* for static data only */
2911

    
2912
/**
2913
 * Frees all static arrays and resets their pointers to 0.
2914
 * Call this function to release all statically allocated tables.
2915
 *
2916
 * @deprecated. Code which uses av_free_static is broken/misdesigned
2917
 * and should correctly use static arrays
2918
 *
2919
 */
2920
attribute_deprecated void av_free_static(void);
2921

    
2922
/**
2923
 * Allocation of static arrays.
2924
 *
2925
 * @warning Do not use for normal allocation.
2926
 *
2927
 * @param[in] size The amount of memory you need in bytes.
2928
 * @return block of memory of the requested size
2929
 * @deprecated. Code which uses av_mallocz_static is broken/misdesigned
2930
 * and should correctly use static arrays
2931
 */
2932
attribute_deprecated av_malloc_attrib av_alloc_size(1)
2933
void *av_mallocz_static(unsigned int size);
2934

    
2935
/**
2936
 * Copy image 'src' to 'dst'.
2937
 */
2938
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2939
              int pix_fmt, int width, int height);
2940

    
2941
/**
2942
 * Crop image top and left side.
2943
 */
2944
int av_picture_crop(AVPicture *dst, const AVPicture *src,
2945
             int pix_fmt, int top_band, int left_band);
2946

    
2947
/**
2948
 * Pad image.
2949
 */
2950
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2951
            int padtop, int padbottom, int padleft, int padright, int *color);
2952

    
2953
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2954
/**
2955
 * @deprecated Use the software scaler (swscale) instead.
2956
 */
2957
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
2958
              int pix_fmt, int width, int height);
2959

    
2960
/**
2961
 * @deprecated Use the software scaler (swscale) instead.
2962
 */
2963
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
2964
             int pix_fmt, int top_band, int left_band);
2965

    
2966
/**
2967
 * @deprecated Use the software scaler (swscale) instead.
2968
 */
2969
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2970
            int padtop, int padbottom, int padleft, int padright, int *color);
2971
#endif
2972

    
2973
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2974

    
2975
/**
2976
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
2977
 *
2978
 * @return 0 in case of a successful parsing, a negative value otherwise
2979
 * @param[in] str the string to parse: it has to be a string in the format
2980
 * <width>x<height> or a valid video frame size abbreviation.
2981
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
2982
 * frame width value
2983
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
2984
 * frame height value
2985
 */
2986
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
2987

    
2988
/**
2989
 * Parses \p str and put in \p frame_rate the detected values.
2990
 *
2991
 * @return 0 in case of a successful parsing, a negative value otherwise
2992
 * @param[in] str the string to parse: it has to be a string in the format
2993
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
2994
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
2995
 * frame rate
2996
 */
2997
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
2998

    
2999
/* error handling */
3000
#if EINVAL > 0
3001
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3002
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3003
#else
3004
/* Some platforms have E* and errno already negated. */
3005
#define AVERROR(e) (e)
3006
#define AVUNERROR(e) (e)
3007
#endif
3008
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3009
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3010
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3011
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3012
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3013
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3014
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3015
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3016
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3017

    
3018
#endif /* FFMPEG_AVCODEC_H */