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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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 * @file libavcodec/avcodec.h
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 * external API header
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 */
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#include <errno.h>
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#include "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 52
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#define LIBAVCODEC_VERSION_MINOR 27
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#define LIBAVCODEC_VERSION_MICRO  0
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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                                               LIBAVCODEC_VERSION_MINOR, \
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                                               LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
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                                           LIBAVCODEC_VERSION_MINOR,    \
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                                           LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
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#define AV_TIME_BASE            1000000
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#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
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/**
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 * Identifies the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. it is as close as possible to similar codecs.
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 */
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enum CodecID {
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    CODEC_ID_NONE,
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    /* video codecs */
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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    CODEC_ID_MPEG2VIDEO_XVMC,
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    CODEC_ID_H261,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_RV20,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MJPEGB,
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    CODEC_ID_LJPEG,
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    CODEC_ID_SP5X,
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    CODEC_ID_JPEGLS,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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    CODEC_ID_WMV2,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    CODEC_ID_FLV1,
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    CODEC_ID_SVQ1,
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    CODEC_ID_SVQ3,
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    CODEC_ID_DVVIDEO,
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    CODEC_ID_HUFFYUV,
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    CODEC_ID_CYUV,
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    CODEC_ID_H264,
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    CODEC_ID_INDEO3,
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    CODEC_ID_VP3,
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    CODEC_ID_THEORA,
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    CODEC_ID_ASV1,
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    CODEC_ID_ASV2,
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    CODEC_ID_FFV1,
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    CODEC_ID_4XM,
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    CODEC_ID_VCR1,
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    CODEC_ID_CLJR,
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    CODEC_ID_MDEC,
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    CODEC_ID_ROQ,
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    CODEC_ID_INTERPLAY_VIDEO,
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    CODEC_ID_XAN_WC3,
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    CODEC_ID_XAN_WC4,
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    CODEC_ID_RPZA,
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    CODEC_ID_CINEPAK,
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    CODEC_ID_WS_VQA,
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    CODEC_ID_MSRLE,
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    CODEC_ID_MSVIDEO1,
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    CODEC_ID_IDCIN,
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    CODEC_ID_8BPS,
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    CODEC_ID_SMC,
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    CODEC_ID_FLIC,
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    CODEC_ID_TRUEMOTION1,
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    CODEC_ID_VMDVIDEO,
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    CODEC_ID_MSZH,
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    CODEC_ID_ZLIB,
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    CODEC_ID_QTRLE,
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    CODEC_ID_SNOW,
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    CODEC_ID_TSCC,
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    CODEC_ID_ULTI,
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    CODEC_ID_QDRAW,
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    CODEC_ID_VIXL,
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    CODEC_ID_QPEG,
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    CODEC_ID_XVID,
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    CODEC_ID_PNG,
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    CODEC_ID_PPM,
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    CODEC_ID_PBM,
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    CODEC_ID_PGM,
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    CODEC_ID_PGMYUV,
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    CODEC_ID_PAM,
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    CODEC_ID_FFVHUFF,
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    CODEC_ID_RV30,
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    CODEC_ID_RV40,
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    CODEC_ID_VC1,
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    CODEC_ID_WMV3,
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    CODEC_ID_LOCO,
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    CODEC_ID_WNV1,
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    CODEC_ID_AASC,
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    CODEC_ID_INDEO2,
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    CODEC_ID_FRAPS,
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    CODEC_ID_TRUEMOTION2,
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    CODEC_ID_BMP,
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    CODEC_ID_CSCD,
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    CODEC_ID_MMVIDEO,
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    CODEC_ID_ZMBV,
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    CODEC_ID_AVS,
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    CODEC_ID_SMACKVIDEO,
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    CODEC_ID_NUV,
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    CODEC_ID_KMVC,
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    CODEC_ID_FLASHSV,
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    CODEC_ID_CAVS,
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    CODEC_ID_JPEG2000,
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    CODEC_ID_VMNC,
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    CODEC_ID_VP5,
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    CODEC_ID_VP6,
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    CODEC_ID_VP6F,
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    CODEC_ID_TARGA,
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    CODEC_ID_DSICINVIDEO,
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    CODEC_ID_TIERTEXSEQVIDEO,
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    CODEC_ID_TIFF,
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    CODEC_ID_GIF,
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    CODEC_ID_FFH264,
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    CODEC_ID_DXA,
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    CODEC_ID_DNXHD,
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    CODEC_ID_THP,
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    CODEC_ID_SGI,
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    CODEC_ID_C93,
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    CODEC_ID_BETHSOFTVID,
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    CODEC_ID_PTX,
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    CODEC_ID_TXD,
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    CODEC_ID_VP6A,
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    CODEC_ID_AMV,
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    CODEC_ID_VB,
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    CODEC_ID_PCX,
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    CODEC_ID_SUNRAST,
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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    CODEC_ID_RL2,
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    CODEC_ID_8SVX_EXP,
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    CODEC_ID_8SVX_FIB,
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    CODEC_ID_ESCAPE124,
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    CODEC_ID_DIRAC,
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    CODEC_ID_BFI,
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    CODEC_ID_CMV,
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    CODEC_ID_MOTIONPIXELS,
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    CODEC_ID_TGV,
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    CODEC_ID_TGQ,
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    CODEC_ID_TQI,
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    CODEC_ID_AURA,
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    CODEC_ID_AURA2,
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    CODEC_ID_V210X,
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    /* various PCM "codecs" */
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    CODEC_ID_PCM_S16LE= 0x10000,
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    CODEC_ID_PCM_S16BE,
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    CODEC_ID_PCM_U16LE,
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    CODEC_ID_PCM_U16BE,
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    CODEC_ID_PCM_S8,
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    CODEC_ID_PCM_U8,
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    CODEC_ID_PCM_MULAW,
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    CODEC_ID_PCM_ALAW,
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    CODEC_ID_PCM_S32LE,
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    CODEC_ID_PCM_S32BE,
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    CODEC_ID_PCM_U32LE,
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    CODEC_ID_PCM_U32BE,
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    CODEC_ID_PCM_S24LE,
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    CODEC_ID_PCM_S24BE,
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    CODEC_ID_PCM_U24LE,
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    CODEC_ID_PCM_U24BE,
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    CODEC_ID_PCM_S24DAUD,
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    CODEC_ID_PCM_ZORK,
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    CODEC_ID_PCM_S16LE_PLANAR,
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    CODEC_ID_PCM_DVD,
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    CODEC_ID_PCM_F32BE,
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    CODEC_ID_PCM_F32LE,
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    CODEC_ID_PCM_F64BE,
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    CODEC_ID_PCM_F64LE,
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    /* various ADPCM codecs */
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    CODEC_ID_ADPCM_IMA_QT= 0x11000,
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    CODEC_ID_ADPCM_IMA_WAV,
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    CODEC_ID_ADPCM_IMA_DK3,
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    CODEC_ID_ADPCM_IMA_DK4,
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    CODEC_ID_ADPCM_IMA_WS,
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    CODEC_ID_ADPCM_IMA_SMJPEG,
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    CODEC_ID_ADPCM_MS,
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    CODEC_ID_ADPCM_4XM,
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    CODEC_ID_ADPCM_XA,
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    CODEC_ID_ADPCM_ADX,
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    CODEC_ID_ADPCM_EA,
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    CODEC_ID_ADPCM_G726,
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    CODEC_ID_ADPCM_CT,
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    CODEC_ID_ADPCM_SWF,
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    CODEC_ID_ADPCM_YAMAHA,
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    CODEC_ID_ADPCM_SBPRO_4,
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    CODEC_ID_ADPCM_SBPRO_3,
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    CODEC_ID_ADPCM_SBPRO_2,
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    CODEC_ID_ADPCM_THP,
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    CODEC_ID_ADPCM_IMA_AMV,
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    CODEC_ID_ADPCM_EA_R1,
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    CODEC_ID_ADPCM_EA_R3,
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    CODEC_ID_ADPCM_EA_R2,
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    CODEC_ID_ADPCM_IMA_EA_SEAD,
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    CODEC_ID_ADPCM_IMA_EA_EACS,
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    CODEC_ID_ADPCM_EA_XAS,
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    CODEC_ID_ADPCM_EA_MAXIS_XA,
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    CODEC_ID_ADPCM_IMA_ISS,
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    /* AMR */
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    CODEC_ID_AMR_NB= 0x12000,
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    CODEC_ID_AMR_WB,
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    /* RealAudio codecs*/
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    CODEC_ID_RA_144= 0x13000,
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    CODEC_ID_RA_288,
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    /* various DPCM codecs */
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    CODEC_ID_ROQ_DPCM= 0x14000,
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    CODEC_ID_INTERPLAY_DPCM,
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    CODEC_ID_XAN_DPCM,
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    CODEC_ID_SOL_DPCM,
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    /* audio codecs */
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    CODEC_ID_MP2= 0x15000,
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    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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    CODEC_ID_AAC,
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    CODEC_ID_AC3,
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    CODEC_ID_DTS,
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    CODEC_ID_VORBIS,
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    CODEC_ID_DVAUDIO,
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    CODEC_ID_WMAV1,
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    CODEC_ID_WMAV2,
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    CODEC_ID_MACE3,
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    CODEC_ID_MACE6,
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    CODEC_ID_VMDAUDIO,
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    CODEC_ID_SONIC,
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    CODEC_ID_SONIC_LS,
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    CODEC_ID_FLAC,
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    CODEC_ID_MP3ADU,
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    CODEC_ID_MP3ON4,
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    CODEC_ID_SHORTEN,
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    CODEC_ID_ALAC,
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    CODEC_ID_WESTWOOD_SND1,
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    CODEC_ID_GSM, ///< as in Berlin toast format
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    CODEC_ID_QDM2,
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    CODEC_ID_COOK,
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    CODEC_ID_TRUESPEECH,
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    CODEC_ID_TTA,
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    CODEC_ID_SMACKAUDIO,
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    CODEC_ID_QCELP,
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    CODEC_ID_WAVPACK,
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    CODEC_ID_DSICINAUDIO,
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    CODEC_ID_IMC,
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    CODEC_ID_MUSEPACK7,
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    CODEC_ID_MLP,
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    CODEC_ID_GSM_MS, /* as found in WAV */
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    CODEC_ID_ATRAC3,
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    CODEC_ID_VOXWARE,
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    CODEC_ID_APE,
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    CODEC_ID_NELLYMOSER,
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    CODEC_ID_MUSEPACK8,
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    CODEC_ID_SPEEX,
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    CODEC_ID_WMAVOICE,
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    CODEC_ID_WMAPRO,
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    CODEC_ID_WMALOSSLESS,
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    CODEC_ID_ATRAC3P,
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    CODEC_ID_EAC3,
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    CODEC_ID_SIPR,
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    CODEC_ID_MP1,
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    CODEC_ID_TWINVQ,
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    CODEC_ID_TRUEHD,
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    CODEC_ID_MP4ALS,
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    /* subtitle codecs */
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    CODEC_ID_DVD_SUBTITLE= 0x17000,
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    CODEC_ID_DVB_SUBTITLE,
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    CODEC_ID_TEXT,  ///< raw UTF-8 text
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    CODEC_ID_XSUB,
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    CODEC_ID_SSA,
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    CODEC_ID_MOV_TEXT,
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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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    CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
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    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
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                                * stream (only used by libavformat) */
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};
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enum CodecType {
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    CODEC_TYPE_UNKNOWN = -1,
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    CODEC_TYPE_VIDEO,
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    CODEC_TYPE_AUDIO,
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    CODEC_TYPE_DATA,
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    CODEC_TYPE_SUBTITLE,
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    CODEC_TYPE_ATTACHMENT,
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    CODEC_TYPE_NB
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};
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/**
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 * all in native-endian format
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 */
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enum SampleFormat {
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    SAMPLE_FMT_NONE = -1,
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    SAMPLE_FMT_U8,              ///< unsigned 8 bits
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    SAMPLE_FMT_S16,             ///< signed 16 bits
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    SAMPLE_FMT_S32,             ///< signed 32 bits
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    SAMPLE_FMT_FLT,             ///< float
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    SAMPLE_FMT_DBL,             ///< double
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    SAMPLE_FMT_NB               ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
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};
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/* Audio channel masks */
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#define CH_FRONT_LEFT             0x00000001
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#define CH_FRONT_RIGHT            0x00000002
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#define CH_FRONT_CENTER           0x00000004
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#define CH_LOW_FREQUENCY          0x00000008
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#define CH_BACK_LEFT              0x00000010
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#define CH_BACK_RIGHT             0x00000020
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#define CH_FRONT_LEFT_OF_CENTER   0x00000040
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#define CH_FRONT_RIGHT_OF_CENTER  0x00000080
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#define CH_BACK_CENTER            0x00000100
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#define CH_SIDE_LEFT              0x00000200
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#define CH_SIDE_RIGHT             0x00000400
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#define CH_TOP_CENTER             0x00000800
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#define CH_TOP_FRONT_LEFT         0x00001000
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#define CH_TOP_FRONT_CENTER       0x00002000
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#define CH_TOP_FRONT_RIGHT        0x00004000
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#define CH_TOP_BACK_LEFT          0x00008000
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#define CH_TOP_BACK_CENTER        0x00010000
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#define CH_TOP_BACK_RIGHT         0x00020000
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#define CH_STEREO_LEFT            0x20000000  ///< Stereo downmix.
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#define CH_STEREO_RIGHT           0x40000000  ///< See CH_STEREO_LEFT.
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/* Audio channel convenience macros */
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#define CH_LAYOUT_MONO              (CH_FRONT_CENTER)
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#define CH_LAYOUT_STEREO            (CH_FRONT_LEFT|CH_FRONT_RIGHT)
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#define CH_LAYOUT_2_1               (CH_LAYOUT_STEREO|CH_BACK_CENTER)
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#define CH_LAYOUT_SURROUND          (CH_LAYOUT_STEREO|CH_FRONT_CENTER)
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#define CH_LAYOUT_4POINT0           (CH_LAYOUT_SURROUND|CH_BACK_CENTER)
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#define CH_LAYOUT_2_2               (CH_LAYOUT_STEREO|CH_SIDE_LEFT|CH_SIDE_RIGHT)
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#define CH_LAYOUT_QUAD              (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT)
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#define CH_LAYOUT_5POINT0           (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT)
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#define CH_LAYOUT_5POINT1           (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY)
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#define CH_LAYOUT_5POINT0_BACK      (CH_LAYOUT_SURROUND|CH_BACK_LEFT|CH_BACK_RIGHT)
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#define CH_LAYOUT_5POINT1_BACK      (CH_LAYOUT_5POINT0_BACK|CH_LOW_FREQUENCY)
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#define CH_LAYOUT_7POINT1           (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT)
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#define CH_LAYOUT_7POINT1_WIDE      (CH_LAYOUT_5POINT1_BACK|\
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                                          CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER)
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#define CH_LAYOUT_STEREO_DOWNMIX    (CH_STEREO_LEFT|CH_STEREO_RIGHT)
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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/**
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 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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 * This is mainly needed because some optimized bitstream readers read
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 * 32 or 64 bit at once and could read over the end.<br>
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 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
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 * MPEG bitstreams could cause overread and segfault.
407
 */
408
#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/**
411
 * minimum encoding buffer size
412
 * Used to avoid some checks during header writing.
413
 */
414
#define FF_MIN_BUFFER_SIZE 16384
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/**
418
 * motion estimation type.
419
 */
420
enum Motion_Est_ID {
421
    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
430
    ME_TESA,        ///< transformed exhaustive search algorithm
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};
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enum AVDiscard{
434
    /* We leave some space between them for extensions (drop some
435
     * keyframes for intra-only or drop just some bidir frames). */
436
    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
442
};
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444
typedef struct RcOverride{
445
    int start_frame;
446
    int end_frame;
447
    int qscale; // If this is 0 then quality_factor will be used instead.
448
    float quality_factor;
449
} RcOverride;
450

    
451
#define FF_MAX_B_FRAMES 16
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453
/* encoding support
454
   These flags can be passed in AVCodecContext.flags before initialization.
455
   Note: Not everything is supported yet.
456
*/
457

    
458
#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>.
463
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
464
/**
465
 * The parent program guarantees that the input for B-frames containing
466
 * streams is not written to for at least s->max_b_frames+1 frames, if
467
 * this is not set the input will be copied.
468
 */
469
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
470
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
471
#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).
473
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
474
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
475
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
476
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
477
                                                  location instead of only at frame boundaries. */
478
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
479
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
480
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
481
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
482
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
483
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
484
/* Fx : Flag for h263+ extra options */
485
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
486
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
487
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
488
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
489
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
490
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
491
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
492
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
493
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
494
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
495
#define CODEC_FLAG_CLOSED_GOP     0x80000000
496
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
497
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
498
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
499
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
500
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
501
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
502
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
503
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
504
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
505
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
506
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
507
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
508
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
509
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
510
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
511
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
512
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
513
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
514

    
515
/* Unsupported options :
516
 *              Syntax Arithmetic coding (SAC)
517
 *              Reference Picture Selection
518
 *              Independent Segment Decoding */
519
/* /Fx */
520
/* codec capabilities */
521

    
522
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
523
/**
524
 * Codec uses get_buffer() for allocating buffers.
525
 * direct rendering method 1
526
 */
527
#define CODEC_CAP_DR1             0x0002
528
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
529
#define CODEC_CAP_PARSE_ONLY      0x0004
530
#define CODEC_CAP_TRUNCATED       0x0008
531
/* Codec can export data for HW decoding (XvMC). */
532
#define CODEC_CAP_HWACCEL         0x0010
533
/**
534
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
535
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
536
 */
537
#define CODEC_CAP_DELAY           0x0020
538
/**
539
 * Codec can be fed a final frame with a smaller size.
540
 * This can be used to prevent truncation of the last audio samples.
541
 */
542
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
543
/**
544
 * Codec can export data for HW decoding (VDPAU).
545
 */
546
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
547

    
548
//The following defines may change, don't expect compatibility if you use them.
549
#define MB_TYPE_INTRA4x4   0x0001
550
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
551
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
552
#define MB_TYPE_16x16      0x0008
553
#define MB_TYPE_16x8       0x0010
554
#define MB_TYPE_8x16       0x0020
555
#define MB_TYPE_8x8        0x0040
556
#define MB_TYPE_INTERLACED 0x0080
557
#define MB_TYPE_DIRECT2    0x0100 //FIXME
558
#define MB_TYPE_ACPRED     0x0200
559
#define MB_TYPE_GMC        0x0400
560
#define MB_TYPE_SKIP       0x0800
561
#define MB_TYPE_P0L0       0x1000
562
#define MB_TYPE_P1L0       0x2000
563
#define MB_TYPE_P0L1       0x4000
564
#define MB_TYPE_P1L1       0x8000
565
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
566
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
567
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
568
#define MB_TYPE_QUANT      0x00010000
569
#define MB_TYPE_CBP        0x00020000
570
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
571

    
572
/**
573
 * Pan Scan area.
574
 * This specifies the area which should be displayed.
575
 * Note there may be multiple such areas for one frame.
576
 */
577
typedef struct AVPanScan{
578
    /**
579
     * id
580
     * - encoding: Set by user.
581
     * - decoding: Set by libavcodec.
582
     */
583
    int id;
584

    
585
    /**
586
     * width and height in 1/16 pel
587
     * - encoding: Set by user.
588
     * - decoding: Set by libavcodec.
589
     */
590
    int width;
591
    int height;
592

    
593
    /**
594
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
595
     * - encoding: Set by user.
596
     * - decoding: Set by libavcodec.
597
     */
598
    int16_t position[3][2];
599
}AVPanScan;
600

    
601
#define FF_COMMON_FRAME \
602
    /**\
603
     * pointer to the picture planes.\
604
     * This might be different from the first allocated byte\
605
     * - encoding: \
606
     * - decoding: \
607
     */\
608
    uint8_t *data[4];\
609
    int linesize[4];\
610
    /**\
611
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
612
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
613
     * - encoding: \
614
     * - decoding: \
615
     */\
616
    uint8_t *base[4];\
617
    /**\
618
     * 1 -> keyframe, 0-> not\
619
     * - encoding: Set by libavcodec.\
620
     * - decoding: Set by libavcodec.\
621
     */\
622
    int key_frame;\
623
\
624
    /**\
625
     * Picture type of the frame, see ?_TYPE below.\
626
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
627
     * - decoding: Set by libavcodec.\
628
     */\
629
    int pict_type;\
630
\
631
    /**\
632
     * presentation timestamp in time_base units (time when frame should be shown to user)\
633
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
634
     * - encoding: MUST be set by user.\
635
     * - decoding: Set by libavcodec.\
636
     */\
637
    int64_t pts;\
638
\
639
    /**\
640
     * picture number in bitstream order\
641
     * - encoding: set by\
642
     * - decoding: Set by libavcodec.\
643
     */\
644
    int coded_picture_number;\
645
    /**\
646
     * picture number in display order\
647
     * - encoding: set by\
648
     * - decoding: Set by libavcodec.\
649
     */\
650
    int display_picture_number;\
651
\
652
    /**\
653
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
654
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
655
     * - decoding: Set by libavcodec.\
656
     */\
657
    int quality; \
658
\
659
    /**\
660
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
661
     * Set to INT_MAX if the buffer has not been used yet.\
662
     * - encoding: unused\
663
     * - decoding: MUST be set by get_buffer().\
664
     */\
665
    int age;\
666
\
667
    /**\
668
     * is this picture used as reference\
669
     * The values for this are the same as the MpegEncContext.picture_structure\
670
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
671
     * Set to 4 for delayed, non-reference frames.\
672
     * - encoding: unused\
673
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
674
     */\
675
    int reference;\
676
\
677
    /**\
678
     * QP table\
679
     * - encoding: unused\
680
     * - decoding: Set by libavcodec.\
681
     */\
682
    int8_t *qscale_table;\
683
    /**\
684
     * QP store stride\
685
     * - encoding: unused\
686
     * - decoding: Set by libavcodec.\
687
     */\
688
    int qstride;\
689
\
690
    /**\
691
     * mbskip_table[mb]>=1 if MB didn't change\
692
     * stride= mb_width = (width+15)>>4\
693
     * - encoding: unused\
694
     * - decoding: Set by libavcodec.\
695
     */\
696
    uint8_t *mbskip_table;\
697
\
698
    /**\
699
     * motion vector table\
700
     * @code\
701
     * example:\
702
     * int mv_sample_log2= 4 - motion_subsample_log2;\
703
     * int mb_width= (width+15)>>4;\
704
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
705
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
706
     * @endcode\
707
     * - encoding: Set by user.\
708
     * - decoding: Set by libavcodec.\
709
     */\
710
    int16_t (*motion_val[2])[2];\
711
\
712
    /**\
713
     * macroblock type table\
714
     * mb_type_base + mb_width + 2\
715
     * - encoding: Set by user.\
716
     * - decoding: Set by libavcodec.\
717
     */\
718
    uint32_t *mb_type;\
719
\
720
    /**\
721
     * log2 of the size of the block which a single vector in motion_val represents: \
722
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
723
     * - encoding: unused\
724
     * - decoding: Set by libavcodec.\
725
     */\
726
    uint8_t motion_subsample_log2;\
727
\
728
    /**\
729
     * for some private data of the user\
730
     * - encoding: unused\
731
     * - decoding: Set by user.\
732
     */\
733
    void *opaque;\
734
\
735
    /**\
736
     * error\
737
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
738
     * - decoding: unused\
739
     */\
740
    uint64_t error[4];\
741
\
742
    /**\
743
     * type of the buffer (to keep track of who has to deallocate data[*])\
744
     * - encoding: Set by the one who allocates it.\
745
     * - decoding: Set by the one who allocates it.\
746
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
747
     */\
748
    int type;\
749
    \
750
    /**\
751
     * When decoding, this signals how much the picture must be delayed.\
752
     * extra_delay = repeat_pict / (2*fps)\
753
     * - encoding: unused\
754
     * - decoding: Set by libavcodec.\
755
     */\
756
    int repeat_pict;\
757
    \
758
    /**\
759
     * \
760
     */\
761
    int qscale_type;\
762
    \
763
    /**\
764
     * The content of the picture is interlaced.\
765
     * - encoding: Set by user.\
766
     * - decoding: Set by libavcodec. (default 0)\
767
     */\
768
    int interlaced_frame;\
769
    \
770
    /**\
771
     * If the content is interlaced, is top field displayed first.\
772
     * - encoding: Set by user.\
773
     * - decoding: Set by libavcodec.\
774
     */\
775
    int top_field_first;\
776
    \
777
    /**\
778
     * Pan scan.\
779
     * - encoding: Set by user.\
780
     * - decoding: Set by libavcodec.\
781
     */\
782
    AVPanScan *pan_scan;\
783
    \
784
    /**\
785
     * Tell user application that palette has changed from previous frame.\
786
     * - encoding: ??? (no palette-enabled encoder yet)\
787
     * - decoding: Set by libavcodec. (default 0).\
788
     */\
789
    int palette_has_changed;\
790
    \
791
    /**\
792
     * codec suggestion on buffer type if != 0\
793
     * - encoding: unused\
794
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
795
     */\
796
    int buffer_hints;\
797
\
798
    /**\
799
     * DCT coefficients\
800
     * - encoding: unused\
801
     * - decoding: Set by libavcodec.\
802
     */\
803
    short *dct_coeff;\
804
\
805
    /**\
806
     * motion referece frame index\
807
     * - encoding: Set by user.\
808
     * - decoding: Set by libavcodec.\
809
     */\
810
    int8_t *ref_index[2];\
811
\
812
    /**\
813
     * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
814
     * output in AVFrame.reordered_opaque\
815
     * - encoding: unused\
816
     * - decoding: Read by user.\
817
     */\
818
    int64_t reordered_opaque;\
819
\
820
    /**\
821
     * hardware accelerator private data (FFmpeg allocated)\
822
     * - encoding: unused\
823
     * - decoding: Set by libavcodec\
824
     */\
825
    void *hwaccel_picture_private;\
826

    
827

    
828
#define FF_QSCALE_TYPE_MPEG1 0
829
#define FF_QSCALE_TYPE_MPEG2 1
830
#define FF_QSCALE_TYPE_H264  2
831

    
832
#define FF_BUFFER_TYPE_INTERNAL 1
833
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
834
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
835
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
836

    
837

    
838
#define FF_I_TYPE  1 ///< Intra
839
#define FF_P_TYPE  2 ///< Predicted
840
#define FF_B_TYPE  3 ///< Bi-dir predicted
841
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
842
#define FF_SI_TYPE 5 ///< Switching Intra
843
#define FF_SP_TYPE 6 ///< Switching Predicted
844
#define FF_BI_TYPE 7
845

    
846
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
847
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
848
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
849
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
850

    
851
typedef struct AVPacket {
852
    /**
853
     * Presentation timestamp in AVStream->time_base units; the time at which
854
     * the decompressed packet will be presented to the user.
855
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
856
     * pts MUST be larger or equal to dts as presentation cannot happen before
857
     * decompression, unless one wants to view hex dumps. Some formats misuse
858
     * the terms dts and pts/cts to mean something different. Such timestamps
859
     * must be converted to true pts/dts before they are stored in AVPacket.
860
     */
861
    int64_t pts;
862
    /**
863
     * Decompression timestamp in AVStream->time_base units; the time at which
864
     * the packet is decompressed.
865
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
866
     */
867
    int64_t dts;
868
    uint8_t *data;
869
    int   size;
870
    int   stream_index;
871
    int   flags;
872
    /**
873
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
874
     * Equals next_pts - this_pts in presentation order.
875
     */
876
    int   duration;
877
    void  (*destruct)(struct AVPacket *);
878
    void  *priv;
879
    int64_t pos;                            ///< byte position in stream, -1 if unknown
880

    
881
    /**
882
     * Time difference in AVStream->time_base units from the pts of this
883
     * packet to the point at which the output from the decoder has converged
884
     * independent from the availability of previous frames. That is, the
885
     * frames are virtually identical no matter if decoding started from
886
     * the very first frame or from this keyframe.
887
     * Is AV_NOPTS_VALUE if unknown.
888
     * This field is not the display duration of the current packet.
889
     *
890
     * The purpose of this field is to allow seeking in streams that have no
891
     * keyframes in the conventional sense. It corresponds to the
892
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
893
     * essential for some types of subtitle streams to ensure that all
894
     * subtitles are correctly displayed after seeking.
895
     */
896
    int64_t convergence_duration;
897
} AVPacket;
898
#define PKT_FLAG_KEY   0x0001
899

    
900
/**
901
 * Audio Video Frame.
902
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
903
 * bumps.
904
 * Removal, reordering and changes to existing fields require a major
905
 * version bump. No fields should be added into AVFrame before or after
906
 * FF_COMMON_FRAME!
907
 * sizeof(AVFrame) must not be used outside libav*.
908
 */
909
typedef struct AVFrame {
910
    FF_COMMON_FRAME
911
} AVFrame;
912

    
913
/**
914
 * main external API structure.
915
 * New fields can be added to the end with minor version bumps.
916
 * Removal, reordering and changes to existing fields require a major
917
 * version bump.
918
 * sizeof(AVCodecContext) must not be used outside libav*.
919
 */
920
typedef struct AVCodecContext {
921
    /**
922
     * information on struct for av_log
923
     * - set by avcodec_alloc_context
924
     */
925
    const AVClass *av_class;
926
    /**
927
     * the average bitrate
928
     * - encoding: Set by user; unused for constant quantizer encoding.
929
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
930
     */
931
    int bit_rate;
932

    
933
    /**
934
     * number of bits the bitstream is allowed to diverge from the reference.
935
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
936
     * - encoding: Set by user; unused for constant quantizer encoding.
937
     * - decoding: unused
938
     */
939
    int bit_rate_tolerance;
940

    
941
    /**
942
     * CODEC_FLAG_*.
943
     * - encoding: Set by user.
944
     * - decoding: Set by user.
945
     */
946
    int flags;
947

    
948
    /**
949
     * Some codecs need additional format info. It is stored here.
950
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
951
     * specific codec MUST set it correctly otherwise stream copy breaks.
952
     * In general use of this field by muxers is not recommanded.
953
     * - encoding: Set by libavcodec.
954
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
955
     */
956
    int sub_id;
957

    
958
    /**
959
     * Motion estimation algorithm used for video coding.
960
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
961
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
962
     * - encoding: MUST be set by user.
963
     * - decoding: unused
964
     */
965
    int me_method;
966

    
967
    /**
968
     * some codecs need / can use extradata like Huffman tables.
969
     * mjpeg: Huffman tables
970
     * rv10: additional flags
971
     * mpeg4: global headers (they can be in the bitstream or here)
972
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
973
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
974
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
975
     * - encoding: Set/allocated/freed by libavcodec.
976
     * - decoding: Set/allocated/freed by user.
977
     */
978
    uint8_t *extradata;
979
    int extradata_size;
980

    
981
    /**
982
     * This is the fundamental unit of time (in seconds) in terms
983
     * of which frame timestamps are represented. For fixed-fps content,
984
     * timebase should be 1/framerate and timestamp increments should be
985
     * identically 1.
986
     * - encoding: MUST be set by user.
987
     * - decoding: Set by libavcodec.
988
     */
989
    AVRational time_base;
990

    
991
    /* video only */
992
    /**
993
     * picture width / height.
994
     * - encoding: MUST be set by user.
995
     * - decoding: Set by libavcodec.
996
     * Note: For compatibility it is possible to set this instead of
997
     * coded_width/height before decoding.
998
     */
999
    int width, height;
1000

    
1001
#define FF_ASPECT_EXTENDED 15
1002

    
1003
    /**
1004
     * the number of pictures in a group of pictures, or 0 for intra_only
1005
     * - encoding: Set by user.
1006
     * - decoding: unused
1007
     */
1008
    int gop_size;
1009

    
1010
    /**
1011
     * Pixel format, see PIX_FMT_xxx.
1012
     * - encoding: Set by user.
1013
     * - decoding: Set by libavcodec.
1014
     */
1015
    enum PixelFormat pix_fmt;
1016

    
1017
    /**
1018
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1019
     * has to read frames at native frame rate.
1020
     * - encoding: Set by user.
1021
     * - decoding: unused
1022
     */
1023
    int rate_emu;
1024

    
1025
    /**
1026
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1027
     * decoder to draw a horizontal band. It improves cache usage. Not
1028
     * all codecs can do that. You must check the codec capabilities
1029
     * beforehand.
1030
     * The function is also used by hardware acceleration APIs.
1031
     * It is called at least once during frame decoding to pass
1032
     * the data needed for hardware render.
1033
     * In that mode instead of pixel data, AVFrame points to
1034
     * a structure specific to the acceleration API. The application
1035
     * reads the structure and can change some fields to indicate progress
1036
     * or mark state.
1037
     * - encoding: unused
1038
     * - decoding: Set by user.
1039
     * @param height the height of the slice
1040
     * @param y the y position of the slice
1041
     * @param type 1->top field, 2->bottom field, 3->frame
1042
     * @param offset offset into the AVFrame.data from which the slice should be read
1043
     */
1044
    void (*draw_horiz_band)(struct AVCodecContext *s,
1045
                            const AVFrame *src, int offset[4],
1046
                            int y, int type, int height);
1047

    
1048
    /* audio only */
1049
    int sample_rate; ///< samples per second
1050
    int channels;    ///< number of audio channels
1051

    
1052
    /**
1053
     * audio sample format
1054
     * - encoding: Set by user.
1055
     * - decoding: Set by libavcodec.
1056
     */
1057
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
1058

    
1059
    /* The following data should not be initialized. */
1060
    /**
1061
     * Samples per packet, initialized when calling 'init'.
1062
     */
1063
    int frame_size;
1064
    int frame_number;   ///< audio or video frame number
1065
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1066

    
1067
    /**
1068
     * Number of frames the decoded output will be delayed relative to
1069
     * the encoded input.
1070
     * - encoding: Set by libavcodec.
1071
     * - decoding: unused
1072
     */
1073
    int delay;
1074

    
1075
    /* - encoding parameters */
1076
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1077
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1078

    
1079
    /**
1080
     * minimum quantizer
1081
     * - encoding: Set by user.
1082
     * - decoding: unused
1083
     */
1084
    int qmin;
1085

    
1086
    /**
1087
     * maximum quantizer
1088
     * - encoding: Set by user.
1089
     * - decoding: unused
1090
     */
1091
    int qmax;
1092

    
1093
    /**
1094
     * maximum quantizer difference between frames
1095
     * - encoding: Set by user.
1096
     * - decoding: unused
1097
     */
1098
    int max_qdiff;
1099

    
1100
    /**
1101
     * maximum number of B-frames between non-B-frames
1102
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1103
     * - encoding: Set by user.
1104
     * - decoding: unused
1105
     */
1106
    int max_b_frames;
1107

    
1108
    /**
1109
     * qscale factor between IP and B-frames
1110
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1111
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1112
     * - encoding: Set by user.
1113
     * - decoding: unused
1114
     */
1115
    float b_quant_factor;
1116

    
1117
    /** obsolete FIXME remove */
1118
    int rc_strategy;
1119
#define FF_RC_STRATEGY_XVID 1
1120

    
1121
    int b_frame_strategy;
1122

    
1123
    /**
1124
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1125
     */
1126
    int hurry_up;
1127

    
1128
    struct AVCodec *codec;
1129

    
1130
    void *priv_data;
1131

    
1132
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1133
                            /* do its best to deliver a chunk with size     */
1134
                            /* below rtp_payload_size, the chunk will start */
1135
                            /* with a start code on some codecs like H.263. */
1136
                            /* This doesn't take account of any particular  */
1137
                            /* headers inside the transmitted RTP payload.  */
1138

    
1139

    
1140
    /* The RTP callback: This function is called    */
1141
    /* every time the encoder has a packet to send. */
1142
    /* It depends on the encoder if the data starts */
1143
    /* with a Start Code (it should). H.263 does.   */
1144
    /* mb_nb contains the number of macroblocks     */
1145
    /* encoded in the RTP payload.                  */
1146
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1147

    
1148
    /* statistics, used for 2-pass encoding */
1149
    int mv_bits;
1150
    int header_bits;
1151
    int i_tex_bits;
1152
    int p_tex_bits;
1153
    int i_count;
1154
    int p_count;
1155
    int skip_count;
1156
    int misc_bits;
1157

    
1158
    /**
1159
     * number of bits used for the previously encoded frame
1160
     * - encoding: Set by libavcodec.
1161
     * - decoding: unused
1162
     */
1163
    int frame_bits;
1164

    
1165
    /**
1166
     * Private data of the user, can be used to carry app specific stuff.
1167
     * - encoding: Set by user.
1168
     * - decoding: Set by user.
1169
     */
1170
    void *opaque;
1171

    
1172
    char codec_name[32];
1173
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1174
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1175

    
1176
    /**
1177
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1178
     * This is used to work around some encoder bugs.
1179
     * A demuxer should set this to what is stored in the field used to identify the codec.
1180
     * If there are multiple such fields in a container then the demuxer should choose the one
1181
     * which maximizes the information about the used codec.
1182
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1183
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1184
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1185
     * first.
1186
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1187
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1188
     */
1189
    unsigned int codec_tag;
1190

    
1191
    /**
1192
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1193
     * - encoding: Set by user
1194
     * - decoding: Set by user
1195
     */
1196
    int workaround_bugs;
1197
#define FF_BUG_AUTODETECT       1  ///< autodetection
1198
#define FF_BUG_OLD_MSMPEG4      2
1199
#define FF_BUG_XVID_ILACE       4
1200
#define FF_BUG_UMP4             8
1201
#define FF_BUG_NO_PADDING       16
1202
#define FF_BUG_AMV              32
1203
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1204
#define FF_BUG_QPEL_CHROMA      64
1205
#define FF_BUG_STD_QPEL         128
1206
#define FF_BUG_QPEL_CHROMA2     256
1207
#define FF_BUG_DIRECT_BLOCKSIZE 512
1208
#define FF_BUG_EDGE             1024
1209
#define FF_BUG_HPEL_CHROMA      2048
1210
#define FF_BUG_DC_CLIP          4096
1211
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1212
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1213

    
1214
    /**
1215
     * luma single coefficient elimination threshold
1216
     * - encoding: Set by user.
1217
     * - decoding: unused
1218
     */
1219
    int luma_elim_threshold;
1220

    
1221
    /**
1222
     * chroma single coeff elimination threshold
1223
     * - encoding: Set by user.
1224
     * - decoding: unused
1225
     */
1226
    int chroma_elim_threshold;
1227

    
1228
    /**
1229
     * strictly follow the standard (MPEG4, ...).
1230
     * - encoding: Set by user.
1231
     * - decoding: Set by user.
1232
     * Setting this to STRICT or higher means the encoder and decoder will
1233
     * generally do stupid things. While setting it to inofficial or lower
1234
     * will mean the encoder might use things that are not supported by all
1235
     * spec compliant decoders. Decoders make no difference between normal,
1236
     * inofficial and experimental, that is they always try to decode things
1237
     * when they can unless they are explicitly asked to behave stupid
1238
     * (=strictly conform to the specs)
1239
     */
1240
    int strict_std_compliance;
1241
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1242
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1243
#define FF_COMPLIANCE_NORMAL        0
1244
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1245
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1246

    
1247
    /**
1248
     * qscale offset between IP and B-frames
1249
     * - encoding: Set by user.
1250
     * - decoding: unused
1251
     */
1252
    float b_quant_offset;
1253

    
1254
    /**
1255
     * Error recognization; higher values will detect more errors but may
1256
     * misdetect some more or less valid parts as errors.
1257
     * - encoding: unused
1258
     * - decoding: Set by user.
1259
     */
1260
    int error_recognition;
1261
#define FF_ER_CAREFUL         1
1262
#define FF_ER_COMPLIANT       2
1263
#define FF_ER_AGGRESSIVE      3
1264
#define FF_ER_VERY_AGGRESSIVE 4
1265

    
1266
    /**
1267
     * Called at the beginning of each frame to get a buffer for it.
1268
     * If pic.reference is set then the frame will be read later by libavcodec.
1269
     * avcodec_align_dimensions() should be used to find the required width and
1270
     * height, as they normally need to be rounded up to the next multiple of 16.
1271
     * - encoding: unused
1272
     * - decoding: Set by libavcodec., user can override.
1273
     */
1274
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1275

    
1276
    /**
1277
     * Called to release buffers which were allocated with get_buffer.
1278
     * A released buffer can be reused in get_buffer().
1279
     * pic.data[*] must be set to NULL.
1280
     * - encoding: unused
1281
     * - decoding: Set by libavcodec., user can override.
1282
     */
1283
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1284

    
1285
    /**
1286
     * Size of the frame reordering buffer in the decoder.
1287
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1288
     * - encoding: Set by libavcodec.
1289
     * - decoding: Set by libavcodec.
1290
     */
1291
    int has_b_frames;
1292

    
1293
    /**
1294
     * number of bytes per packet if constant and known or 0
1295
     * Used by some WAV based audio codecs.
1296
     */
1297
    int block_align;
1298

    
1299
    int parse_only; /* - decoding only: If true, only parsing is done
1300
                       (function avcodec_parse_frame()). The frame
1301
                       data is returned. Only MPEG codecs support this now. */
1302

    
1303
    /**
1304
     * 0-> h263 quant 1-> mpeg quant
1305
     * - encoding: Set by user.
1306
     * - decoding: unused
1307
     */
1308
    int mpeg_quant;
1309

    
1310
    /**
1311
     * pass1 encoding statistics output buffer
1312
     * - encoding: Set by libavcodec.
1313
     * - decoding: unused
1314
     */
1315
    char *stats_out;
1316

    
1317
    /**
1318
     * pass2 encoding statistics input buffer
1319
     * Concatenated stuff from stats_out of pass1 should be placed here.
1320
     * - encoding: Allocated/set/freed by user.
1321
     * - decoding: unused
1322
     */
1323
    char *stats_in;
1324

    
1325
    /**
1326
     * ratecontrol qmin qmax limiting method
1327
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1328
     * - encoding: Set by user.
1329
     * - decoding: unused
1330
     */
1331
    float rc_qsquish;
1332

    
1333
    float rc_qmod_amp;
1334
    int rc_qmod_freq;
1335

    
1336
    /**
1337
     * ratecontrol override, see RcOverride
1338
     * - encoding: Allocated/set/freed by user.
1339
     * - decoding: unused
1340
     */
1341
    RcOverride *rc_override;
1342
    int rc_override_count;
1343

    
1344
    /**
1345
     * rate control equation
1346
     * - encoding: Set by user
1347
     * - decoding: unused
1348
     */
1349
    const char *rc_eq;
1350

    
1351
    /**
1352
     * maximum bitrate
1353
     * - encoding: Set by user.
1354
     * - decoding: unused
1355
     */
1356
    int rc_max_rate;
1357

    
1358
    /**
1359
     * minimum bitrate
1360
     * - encoding: Set by user.
1361
     * - decoding: unused
1362
     */
1363
    int rc_min_rate;
1364

    
1365
    /**
1366
     * decoder bitstream buffer size
1367
     * - encoding: Set by user.
1368
     * - decoding: unused
1369
     */
1370
    int rc_buffer_size;
1371
    float rc_buffer_aggressivity;
1372

    
1373
    /**
1374
     * qscale factor between P and I-frames
1375
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1376
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1377
     * - encoding: Set by user.
1378
     * - decoding: unused
1379
     */
1380
    float i_quant_factor;
1381

    
1382
    /**
1383
     * qscale offset between P and I-frames
1384
     * - encoding: Set by user.
1385
     * - decoding: unused
1386
     */
1387
    float i_quant_offset;
1388

    
1389
    /**
1390
     * initial complexity for pass1 ratecontrol
1391
     * - encoding: Set by user.
1392
     * - decoding: unused
1393
     */
1394
    float rc_initial_cplx;
1395

    
1396
    /**
1397
     * DCT algorithm, see FF_DCT_* below
1398
     * - encoding: Set by user.
1399
     * - decoding: unused
1400
     */
1401
    int dct_algo;
1402
#define FF_DCT_AUTO    0
1403
#define FF_DCT_FASTINT 1
1404
#define FF_DCT_INT     2
1405
#define FF_DCT_MMX     3
1406
#define FF_DCT_MLIB    4
1407
#define FF_DCT_ALTIVEC 5
1408
#define FF_DCT_FAAN    6
1409

    
1410
    /**
1411
     * luminance masking (0-> disabled)
1412
     * - encoding: Set by user.
1413
     * - decoding: unused
1414
     */
1415
    float lumi_masking;
1416

    
1417
    /**
1418
     * temporary complexity masking (0-> disabled)
1419
     * - encoding: Set by user.
1420
     * - decoding: unused
1421
     */
1422
    float temporal_cplx_masking;
1423

    
1424
    /**
1425
     * spatial complexity masking (0-> disabled)
1426
     * - encoding: Set by user.
1427
     * - decoding: unused
1428
     */
1429
    float spatial_cplx_masking;
1430

    
1431
    /**
1432
     * p block masking (0-> disabled)
1433
     * - encoding: Set by user.
1434
     * - decoding: unused
1435
     */
1436
    float p_masking;
1437

    
1438
    /**
1439
     * darkness masking (0-> disabled)
1440
     * - encoding: Set by user.
1441
     * - decoding: unused
1442
     */
1443
    float dark_masking;
1444

    
1445
    /**
1446
     * IDCT algorithm, see FF_IDCT_* below.
1447
     * - encoding: Set by user.
1448
     * - decoding: Set by user.
1449
     */
1450
    int idct_algo;
1451
#define FF_IDCT_AUTO          0
1452
#define FF_IDCT_INT           1
1453
#define FF_IDCT_SIMPLE        2
1454
#define FF_IDCT_SIMPLEMMX     3
1455
#define FF_IDCT_LIBMPEG2MMX   4
1456
#define FF_IDCT_PS2           5
1457
#define FF_IDCT_MLIB          6
1458
#define FF_IDCT_ARM           7
1459
#define FF_IDCT_ALTIVEC       8
1460
#define FF_IDCT_SH4           9
1461
#define FF_IDCT_SIMPLEARM     10
1462
#define FF_IDCT_H264          11
1463
#define FF_IDCT_VP3           12
1464
#define FF_IDCT_IPP           13
1465
#define FF_IDCT_XVIDMMX       14
1466
#define FF_IDCT_CAVS          15
1467
#define FF_IDCT_SIMPLEARMV5TE 16
1468
#define FF_IDCT_SIMPLEARMV6   17
1469
#define FF_IDCT_SIMPLEVIS     18
1470
#define FF_IDCT_WMV2          19
1471
#define FF_IDCT_FAAN          20
1472
#define FF_IDCT_EA            21
1473
#define FF_IDCT_SIMPLENEON    22
1474
#define FF_IDCT_SIMPLEALPHA   23
1475

    
1476
    /**
1477
     * slice count
1478
     * - encoding: Set by libavcodec.
1479
     * - decoding: Set by user (or 0).
1480
     */
1481
    int slice_count;
1482
    /**
1483
     * slice offsets in the frame in bytes
1484
     * - encoding: Set/allocated by libavcodec.
1485
     * - decoding: Set/allocated by user (or NULL).
1486
     */
1487
    int *slice_offset;
1488

    
1489
    /**
1490
     * error concealment flags
1491
     * - encoding: unused
1492
     * - decoding: Set by user.
1493
     */
1494
    int error_concealment;
1495
#define FF_EC_GUESS_MVS   1
1496
#define FF_EC_DEBLOCK     2
1497

    
1498
    /**
1499
     * dsp_mask could be add used to disable unwanted CPU features
1500
     * CPU features (i.e. MMX, SSE. ...)
1501
     *
1502
     * With the FORCE flag you may instead enable given CPU features.
1503
     * (Dangerous: Usable in case of misdetection, improper usage however will
1504
     * result into program crash.)
1505
     */
1506
    unsigned dsp_mask;
1507
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1508
    /* lower 16 bits - CPU features */
1509
#define FF_MM_MMX      0x0001 ///< standard MMX
1510
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1511
#if LIBAVCODEC_VERSION_MAJOR < 53
1512
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1513
#endif
1514
#define FF_MM_MMX2     0x0002 ///< SSE integer functions or AMD MMX ext
1515
#define FF_MM_SSE      0x0008 ///< SSE functions
1516
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1517
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1518
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1519
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1520
#define FF_MM_SSE4     0x0100 ///< Penryn SSE4.1 functions
1521
#define FF_MM_SSE42    0x0200 ///< Nehalem SSE4.2 functions
1522
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1523
#define FF_MM_ALTIVEC  0x0001 ///< standard AltiVec
1524

    
1525
    /**
1526
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1527
     * - encoding: Set by libavcodec.
1528
     * - decoding: Set by user.
1529
     */
1530
     int bits_per_coded_sample;
1531

    
1532
    /**
1533
     * prediction method (needed for huffyuv)
1534
     * - encoding: Set by user.
1535
     * - decoding: unused
1536
     */
1537
     int prediction_method;
1538
#define FF_PRED_LEFT   0
1539
#define FF_PRED_PLANE  1
1540
#define FF_PRED_MEDIAN 2
1541

    
1542
    /**
1543
     * sample aspect ratio (0 if unknown)
1544
     * That is the width of a pixel divided by the height of the pixel.
1545
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1546
     * - encoding: Set by user.
1547
     * - decoding: Set by libavcodec.
1548
     */
1549
    AVRational sample_aspect_ratio;
1550

    
1551
    /**
1552
     * the picture in the bitstream
1553
     * - encoding: Set by libavcodec.
1554
     * - decoding: Set by libavcodec.
1555
     */
1556
    AVFrame *coded_frame;
1557

    
1558
    /**
1559
     * debug
1560
     * - encoding: Set by user.
1561
     * - decoding: Set by user.
1562
     */
1563
    int debug;
1564
#define FF_DEBUG_PICT_INFO   1
1565
#define FF_DEBUG_RC          2
1566
#define FF_DEBUG_BITSTREAM   4
1567
#define FF_DEBUG_MB_TYPE     8
1568
#define FF_DEBUG_QP          16
1569
#define FF_DEBUG_MV          32
1570
#define FF_DEBUG_DCT_COEFF   0x00000040
1571
#define FF_DEBUG_SKIP        0x00000080
1572
#define FF_DEBUG_STARTCODE   0x00000100
1573
#define FF_DEBUG_PTS         0x00000200
1574
#define FF_DEBUG_ER          0x00000400
1575
#define FF_DEBUG_MMCO        0x00000800
1576
#define FF_DEBUG_BUGS        0x00001000
1577
#define FF_DEBUG_VIS_QP      0x00002000
1578
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1579
#define FF_DEBUG_BUFFERS     0x00008000
1580

    
1581
    /**
1582
     * debug
1583
     * - encoding: Set by user.
1584
     * - decoding: Set by user.
1585
     */
1586
    int debug_mv;
1587
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1588
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1589
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1590

    
1591
    /**
1592
     * error
1593
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1594
     * - decoding: unused
1595
     */
1596
    uint64_t error[4];
1597

    
1598
    /**
1599
     * minimum MB quantizer
1600
     * - encoding: unused
1601
     * - decoding: unused
1602
     */
1603
    int mb_qmin;
1604

    
1605
    /**
1606
     * maximum MB quantizer
1607
     * - encoding: unused
1608
     * - decoding: unused
1609
     */
1610
    int mb_qmax;
1611

    
1612
    /**
1613
     * motion estimation comparison function
1614
     * - encoding: Set by user.
1615
     * - decoding: unused
1616
     */
1617
    int me_cmp;
1618
    /**
1619
     * subpixel motion estimation comparison function
1620
     * - encoding: Set by user.
1621
     * - decoding: unused
1622
     */
1623
    int me_sub_cmp;
1624
    /**
1625
     * macroblock comparison function (not supported yet)
1626
     * - encoding: Set by user.
1627
     * - decoding: unused
1628
     */
1629
    int mb_cmp;
1630
    /**
1631
     * interlaced DCT comparison function
1632
     * - encoding: Set by user.
1633
     * - decoding: unused
1634
     */
1635
    int ildct_cmp;
1636
#define FF_CMP_SAD    0
1637
#define FF_CMP_SSE    1
1638
#define FF_CMP_SATD   2
1639
#define FF_CMP_DCT    3
1640
#define FF_CMP_PSNR   4
1641
#define FF_CMP_BIT    5
1642
#define FF_CMP_RD     6
1643
#define FF_CMP_ZERO   7
1644
#define FF_CMP_VSAD   8
1645
#define FF_CMP_VSSE   9
1646
#define FF_CMP_NSSE   10
1647
#define FF_CMP_W53    11
1648
#define FF_CMP_W97    12
1649
#define FF_CMP_DCTMAX 13
1650
#define FF_CMP_DCT264 14
1651
#define FF_CMP_CHROMA 256
1652

    
1653
    /**
1654
     * ME diamond size & shape
1655
     * - encoding: Set by user.
1656
     * - decoding: unused
1657
     */
1658
    int dia_size;
1659

    
1660
    /**
1661
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1662
     * - encoding: Set by user.
1663
     * - decoding: unused
1664
     */
1665
    int last_predictor_count;
1666

    
1667
    /**
1668
     * prepass for motion estimation
1669
     * - encoding: Set by user.
1670
     * - decoding: unused
1671
     */
1672
    int pre_me;
1673

    
1674
    /**
1675
     * motion estimation prepass comparison function
1676
     * - encoding: Set by user.
1677
     * - decoding: unused
1678
     */
1679
    int me_pre_cmp;
1680

    
1681
    /**
1682
     * ME prepass diamond size & shape
1683
     * - encoding: Set by user.
1684
     * - decoding: unused
1685
     */
1686
    int pre_dia_size;
1687

    
1688
    /**
1689
     * subpel ME quality
1690
     * - encoding: Set by user.
1691
     * - decoding: unused
1692
     */
1693
    int me_subpel_quality;
1694

    
1695
    /**
1696
     * callback to negotiate the pixelFormat
1697
     * @param fmt is the list of formats which are supported by the codec,
1698
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1699
     * The first is always the native one.
1700
     * @return the chosen format
1701
     * - encoding: unused
1702
     * - decoding: Set by user, if not set the native format will be chosen.
1703
     */
1704
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1705

    
1706
    /**
1707
     * DTG active format information (additional aspect ratio
1708
     * information only used in DVB MPEG-2 transport streams)
1709
     * 0 if not set.
1710
     *
1711
     * - encoding: unused
1712
     * - decoding: Set by decoder.
1713
     */
1714
    int dtg_active_format;
1715
#define FF_DTG_AFD_SAME         8
1716
#define FF_DTG_AFD_4_3          9
1717
#define FF_DTG_AFD_16_9         10
1718
#define FF_DTG_AFD_14_9         11
1719
#define FF_DTG_AFD_4_3_SP_14_9  13
1720
#define FF_DTG_AFD_16_9_SP_14_9 14
1721
#define FF_DTG_AFD_SP_4_3       15
1722

    
1723
    /**
1724
     * maximum motion estimation search range in subpel units
1725
     * If 0 then no limit.
1726
     *
1727
     * - encoding: Set by user.
1728
     * - decoding: unused
1729
     */
1730
    int me_range;
1731

    
1732
    /**
1733
     * intra quantizer bias
1734
     * - encoding: Set by user.
1735
     * - decoding: unused
1736
     */
1737
    int intra_quant_bias;
1738
#define FF_DEFAULT_QUANT_BIAS 999999
1739

    
1740
    /**
1741
     * inter quantizer bias
1742
     * - encoding: Set by user.
1743
     * - decoding: unused
1744
     */
1745
    int inter_quant_bias;
1746

    
1747
    /**
1748
     * color table ID
1749
     * - encoding: unused
1750
     * - decoding: Which clrtable should be used for 8bit RGB images.
1751
     *             Tables have to be stored somewhere. FIXME
1752
     */
1753
    int color_table_id;
1754

    
1755
    /**
1756
     * internal_buffer count
1757
     * Don't touch, used by libavcodec default_get_buffer().
1758
     */
1759
    int internal_buffer_count;
1760

    
1761
    /**
1762
     * internal_buffers
1763
     * Don't touch, used by libavcodec default_get_buffer().
1764
     */
1765
    void *internal_buffer;
1766

    
1767
#define FF_LAMBDA_SHIFT 7
1768
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1769
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1770
#define FF_LAMBDA_MAX (256*128-1)
1771

    
1772
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1773
    /**
1774
     * Global quality for codecs which cannot change it per frame.
1775
     * This should be proportional to MPEG-1/2/4 qscale.
1776
     * - encoding: Set by user.
1777
     * - decoding: unused
1778
     */
1779
    int global_quality;
1780

    
1781
#define FF_CODER_TYPE_VLC       0
1782
#define FF_CODER_TYPE_AC        1
1783
#define FF_CODER_TYPE_RAW       2
1784
#define FF_CODER_TYPE_RLE       3
1785
#define FF_CODER_TYPE_DEFLATE   4
1786
    /**
1787
     * coder type
1788
     * - encoding: Set by user.
1789
     * - decoding: unused
1790
     */
1791
    int coder_type;
1792

    
1793
    /**
1794
     * context model
1795
     * - encoding: Set by user.
1796
     * - decoding: unused
1797
     */
1798
    int context_model;
1799
#if 0
1800
    /**
1801
     *
1802
     * - encoding: unused
1803
     * - decoding: Set by user.
1804
     */
1805
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1806
#endif
1807

    
1808
    /**
1809
     * slice flags
1810
     * - encoding: unused
1811
     * - decoding: Set by user.
1812
     */
1813
    int slice_flags;
1814
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1815
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1816
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1817

    
1818
    /**
1819
     * XVideo Motion Acceleration
1820
     * - encoding: forbidden
1821
     * - decoding: set by decoder
1822
     */
1823
    int xvmc_acceleration;
1824

    
1825
    /**
1826
     * macroblock decision mode
1827
     * - encoding: Set by user.
1828
     * - decoding: unused
1829
     */
1830
    int mb_decision;
1831
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1832
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1833
#define FF_MB_DECISION_RD     2        ///< rate distortion
1834

    
1835
    /**
1836
     * custom intra quantization matrix
1837
     * - encoding: Set by user, can be NULL.
1838
     * - decoding: Set by libavcodec.
1839
     */
1840
    uint16_t *intra_matrix;
1841

    
1842
    /**
1843
     * custom inter quantization matrix
1844
     * - encoding: Set by user, can be NULL.
1845
     * - decoding: Set by libavcodec.
1846
     */
1847
    uint16_t *inter_matrix;
1848

    
1849
    /**
1850
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1851
     * This is used to work around some encoder bugs.
1852
     * - encoding: unused
1853
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1854
     */
1855
    unsigned int stream_codec_tag;
1856

    
1857
    /**
1858
     * scene change detection threshold
1859
     * 0 is default, larger means fewer detected scene changes.
1860
     * - encoding: Set by user.
1861
     * - decoding: unused
1862
     */
1863
    int scenechange_threshold;
1864

    
1865
    /**
1866
     * minimum Lagrange multipler
1867
     * - encoding: Set by user.
1868
     * - decoding: unused
1869
     */
1870
    int lmin;
1871

    
1872
    /**
1873
     * maximum Lagrange multipler
1874
     * - encoding: Set by user.
1875
     * - decoding: unused
1876
     */
1877
    int lmax;
1878

    
1879
    /**
1880
     * palette control structure
1881
     * - encoding: ??? (no palette-enabled encoder yet)
1882
     * - decoding: Set by user.
1883
     */
1884
    struct AVPaletteControl *palctrl;
1885

    
1886
    /**
1887
     * noise reduction strength
1888
     * - encoding: Set by user.
1889
     * - decoding: unused
1890
     */
1891
    int noise_reduction;
1892

    
1893
    /**
1894
     * Called at the beginning of a frame to get cr buffer for it.
1895
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1896
     * libavcodec will pass previous buffer in pic, function should return
1897
     * same buffer or new buffer with old frame "painted" into it.
1898
     * If pic.data[0] == NULL must behave like get_buffer().
1899
     * - encoding: unused
1900
     * - decoding: Set by libavcodec., user can override
1901
     */
1902
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1903

    
1904
    /**
1905
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1906
     * - encoding: Set by user.
1907
     * - decoding: unused
1908
     */
1909
    int rc_initial_buffer_occupancy;
1910

    
1911
    /**
1912
     *
1913
     * - encoding: Set by user.
1914
     * - decoding: unused
1915
     */
1916
    int inter_threshold;
1917

    
1918
    /**
1919
     * CODEC_FLAG2_*
1920
     * - encoding: Set by user.
1921
     * - decoding: Set by user.
1922
     */
1923
    int flags2;
1924

    
1925
    /**
1926
     * Simulates errors in the bitstream to test error concealment.
1927
     * - encoding: Set by user.
1928
     * - decoding: unused
1929
     */
1930
    int error_rate;
1931

    
1932
    /**
1933
     * MP3 antialias algorithm, see FF_AA_* below.
1934
     * - encoding: unused
1935
     * - decoding: Set by user.
1936
     */
1937
    int antialias_algo;
1938
#define FF_AA_AUTO    0
1939
#define FF_AA_FASTINT 1 //not implemented yet
1940
#define FF_AA_INT     2
1941
#define FF_AA_FLOAT   3
1942
    /**
1943
     * quantizer noise shaping
1944
     * - encoding: Set by user.
1945
     * - decoding: unused
1946
     */
1947
    int quantizer_noise_shaping;
1948

    
1949
    /**
1950
     * thread count
1951
     * is used to decide how many independent tasks should be passed to execute()
1952
     * - encoding: Set by user.
1953
     * - decoding: Set by user.
1954
     */
1955
    int thread_count;
1956

    
1957
    /**
1958
     * The codec may call this to execute several independent things.
1959
     * It will return only after finishing all tasks.
1960
     * The user may replace this with some multithreaded implementation,
1961
     * the default implementation will execute the parts serially.
1962
     * @param count the number of things to execute
1963
     * - encoding: Set by libavcodec, user can override.
1964
     * - decoding: Set by libavcodec, user can override.
1965
     */
1966
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
1967

    
1968
    /**
1969
     * thread opaque
1970
     * Can be used by execute() to store some per AVCodecContext stuff.
1971
     * - encoding: set by execute()
1972
     * - decoding: set by execute()
1973
     */
1974
    void *thread_opaque;
1975

    
1976
    /**
1977
     * Motion estimation threshold below which no motion estimation is
1978
     * performed, but instead the user specified motion vectors are used.
1979
     *
1980
     * - encoding: Set by user.
1981
     * - decoding: unused
1982
     */
1983
     int me_threshold;
1984

    
1985
    /**
1986
     * Macroblock threshold below which the user specified macroblock types will be used.
1987
     * - encoding: Set by user.
1988
     * - decoding: unused
1989
     */
1990
     int mb_threshold;
1991

    
1992
    /**
1993
     * precision of the intra DC coefficient - 8
1994
     * - encoding: Set by user.
1995
     * - decoding: unused
1996
     */
1997
     int intra_dc_precision;
1998

    
1999
    /**
2000
     * noise vs. sse weight for the nsse comparsion function
2001
     * - encoding: Set by user.
2002
     * - decoding: unused
2003
     */
2004
     int nsse_weight;
2005

    
2006
    /**
2007
     * Number of macroblock rows at the top which are skipped.
2008
     * - encoding: unused
2009
     * - decoding: Set by user.
2010
     */
2011
     int skip_top;
2012

    
2013
    /**
2014
     * Number of macroblock rows at the bottom which are skipped.
2015
     * - encoding: unused
2016
     * - decoding: Set by user.
2017
     */
2018
     int skip_bottom;
2019

    
2020
    /**
2021
     * profile
2022
     * - encoding: Set by user.
2023
     * - decoding: Set by libavcodec.
2024
     */
2025
     int profile;
2026
#define FF_PROFILE_UNKNOWN -99
2027
#define FF_PROFILE_AAC_MAIN 0
2028
#define FF_PROFILE_AAC_LOW  1
2029
#define FF_PROFILE_AAC_SSR  2
2030
#define FF_PROFILE_AAC_LTP  3
2031

    
2032
    /**
2033
     * level
2034
     * - encoding: Set by user.
2035
     * - decoding: Set by libavcodec.
2036
     */
2037
     int level;
2038
#define FF_LEVEL_UNKNOWN -99
2039

    
2040
    /**
2041
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2042
     * - encoding: unused
2043
     * - decoding: Set by user.
2044
     */
2045
     int lowres;
2046

    
2047
    /**
2048
     * Bitstream width / height, may be different from width/height if lowres
2049
     * or other things are used.
2050
     * - encoding: unused
2051
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2052
     */
2053
    int coded_width, coded_height;
2054

    
2055
    /**
2056
     * frame skip threshold
2057
     * - encoding: Set by user.
2058
     * - decoding: unused
2059
     */
2060
    int frame_skip_threshold;
2061

    
2062
    /**
2063
     * frame skip factor
2064
     * - encoding: Set by user.
2065
     * - decoding: unused
2066
     */
2067
    int frame_skip_factor;
2068

    
2069
    /**
2070
     * frame skip exponent
2071
     * - encoding: Set by user.
2072
     * - decoding: unused
2073
     */
2074
    int frame_skip_exp;
2075

    
2076
    /**
2077
     * frame skip comparison function
2078
     * - encoding: Set by user.
2079
     * - decoding: unused
2080
     */
2081
    int frame_skip_cmp;
2082

    
2083
    /**
2084
     * Border processing masking, raises the quantizer for mbs on the borders
2085
     * of the picture.
2086
     * - encoding: Set by user.
2087
     * - decoding: unused
2088
     */
2089
    float border_masking;
2090

    
2091
    /**
2092
     * minimum MB lagrange multipler
2093
     * - encoding: Set by user.
2094
     * - decoding: unused
2095
     */
2096
    int mb_lmin;
2097

    
2098
    /**
2099
     * maximum MB lagrange multipler
2100
     * - encoding: Set by user.
2101
     * - decoding: unused
2102
     */
2103
    int mb_lmax;
2104

    
2105
    /**
2106
     *
2107
     * - encoding: Set by user.
2108
     * - decoding: unused
2109
     */
2110
    int me_penalty_compensation;
2111

    
2112
    /**
2113
     *
2114
     * - encoding: unused
2115
     * - decoding: Set by user.
2116
     */
2117
    enum AVDiscard skip_loop_filter;
2118

    
2119
    /**
2120
     *
2121
     * - encoding: unused
2122
     * - decoding: Set by user.
2123
     */
2124
    enum AVDiscard skip_idct;
2125

    
2126
    /**
2127
     *
2128
     * - encoding: unused
2129
     * - decoding: Set by user.
2130
     */
2131
    enum AVDiscard skip_frame;
2132

    
2133
    /**
2134
     *
2135
     * - encoding: Set by user.
2136
     * - decoding: unused
2137
     */
2138
    int bidir_refine;
2139

    
2140
    /**
2141
     *
2142
     * - encoding: Set by user.
2143
     * - decoding: unused
2144
     */
2145
    int brd_scale;
2146

    
2147
    /**
2148
     * constant rate factor - quality-based VBR - values ~correspond to qps
2149
     * - encoding: Set by user.
2150
     * - decoding: unused
2151
     */
2152
    float crf;
2153

    
2154
    /**
2155
     * constant quantization parameter rate control method
2156
     * - encoding: Set by user.
2157
     * - decoding: unused
2158
     */
2159
    int cqp;
2160

    
2161
    /**
2162
     * minimum GOP size
2163
     * - encoding: Set by user.
2164
     * - decoding: unused
2165
     */
2166
    int keyint_min;
2167

    
2168
    /**
2169
     * number of reference frames
2170
     * - encoding: Set by user.
2171
     * - decoding: Set by lavc.
2172
     */
2173
    int refs;
2174

    
2175
    /**
2176
     * chroma qp offset from luma
2177
     * - encoding: Set by user.
2178
     * - decoding: unused
2179
     */
2180
    int chromaoffset;
2181

    
2182
    /**
2183
     * Influences how often B-frames are used.
2184
     * - encoding: Set by user.
2185
     * - decoding: unused
2186
     */
2187
    int bframebias;
2188

    
2189
    /**
2190
     * trellis RD quantization
2191
     * - encoding: Set by user.
2192
     * - decoding: unused
2193
     */
2194
    int trellis;
2195

    
2196
    /**
2197
     * Reduce fluctuations in qp (before curve compression).
2198
     * - encoding: Set by user.
2199
     * - decoding: unused
2200
     */
2201
    float complexityblur;
2202

    
2203
    /**
2204
     * in-loop deblocking filter alphac0 parameter
2205
     * alpha is in the range -6...6
2206
     * - encoding: Set by user.
2207
     * - decoding: unused
2208
     */
2209
    int deblockalpha;
2210

    
2211
    /**
2212
     * in-loop deblocking filter beta parameter
2213
     * beta is in the range -6...6
2214
     * - encoding: Set by user.
2215
     * - decoding: unused
2216
     */
2217
    int deblockbeta;
2218

    
2219
    /**
2220
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2221
     * - encoding: Set by user.
2222
     * - decoding: unused
2223
     */
2224
    int partitions;
2225
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2226
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2227
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2228
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2229
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2230

    
2231
    /**
2232
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2233
     * - encoding: Set by user.
2234
     * - decoding: unused
2235
     */
2236
    int directpred;
2237

    
2238
    /**
2239
     * Audio cutoff bandwidth (0 means "automatic")
2240
     * - encoding: Set by user.
2241
     * - decoding: unused
2242
     */
2243
    int cutoff;
2244

    
2245
    /**
2246
     * Multiplied by qscale for each frame and added to scene_change_score.
2247
     * - encoding: Set by user.
2248
     * - decoding: unused
2249
     */
2250
    int scenechange_factor;
2251

    
2252
    /**
2253
     *
2254
     * Note: Value depends upon the compare function used for fullpel ME.
2255
     * - encoding: Set by user.
2256
     * - decoding: unused
2257
     */
2258
    int mv0_threshold;
2259

    
2260
    /**
2261
     * Adjusts sensitivity of b_frame_strategy 1.
2262
     * - encoding: Set by user.
2263
     * - decoding: unused
2264
     */
2265
    int b_sensitivity;
2266

    
2267
    /**
2268
     * - encoding: Set by user.
2269
     * - decoding: unused
2270
     */
2271
    int compression_level;
2272
#define FF_COMPRESSION_DEFAULT -1
2273

    
2274
    /**
2275
     * Sets whether to use LPC mode - used by FLAC encoder.
2276
     * - encoding: Set by user.
2277
     * - decoding: unused
2278
     */
2279
    int use_lpc;
2280

    
2281
    /**
2282
     * LPC coefficient precision - used by FLAC encoder
2283
     * - encoding: Set by user.
2284
     * - decoding: unused
2285
     */
2286
    int lpc_coeff_precision;
2287

    
2288
    /**
2289
     * - encoding: Set by user.
2290
     * - decoding: unused
2291
     */
2292
    int min_prediction_order;
2293

    
2294
    /**
2295
     * - encoding: Set by user.
2296
     * - decoding: unused
2297
     */
2298
    int max_prediction_order;
2299

    
2300
    /**
2301
     * search method for selecting prediction order
2302
     * - encoding: Set by user.
2303
     * - decoding: unused
2304
     */
2305
    int prediction_order_method;
2306

    
2307
    /**
2308
     * - encoding: Set by user.
2309
     * - decoding: unused
2310
     */
2311
    int min_partition_order;
2312

    
2313
    /**
2314
     * - encoding: Set by user.
2315
     * - decoding: unused
2316
     */
2317
    int max_partition_order;
2318

    
2319
    /**
2320
     * GOP timecode frame start number, in non drop frame format
2321
     * - encoding: Set by user.
2322
     * - decoding: unused
2323
     */
2324
    int64_t timecode_frame_start;
2325

    
2326
#if LIBAVCODEC_VERSION_MAJOR < 53
2327
    /**
2328
     * @deprecated Deprecated in favor of request_channel_layout.
2329
     */
2330
    int request_channels;
2331
#endif
2332

    
2333
    /**
2334
     * Percentage of dynamic range compression to be applied by the decoder.
2335
     * The default value is 1.0, corresponding to full compression.
2336
     * - encoding: unused
2337
     * - decoding: Set by user.
2338
     */
2339
    float drc_scale;
2340

    
2341
    /**
2342
     * opaque 64bit number (generally a PTS) that will be reordered and
2343
     * output in AVFrame.reordered_opaque
2344
     * - encoding: unused
2345
     * - decoding: Set by user.
2346
     */
2347
    int64_t reordered_opaque;
2348

    
2349
    /**
2350
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2351
     * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2352
     * - encoding: set by user.
2353
     * - decoding: set by libavcodec.
2354
     */
2355
    int bits_per_raw_sample;
2356

    
2357
    /**
2358
     * Audio channel layout.
2359
     * - encoding: set by user.
2360
     * - decoding: set by libavcodec.
2361
     */
2362
    int64_t channel_layout;
2363

    
2364
    /**
2365
     * Request decoder to use this channel layout if it can (0 for default)
2366
     * - encoding: unused
2367
     * - decoding: Set by user.
2368
     */
2369
    int64_t request_channel_layout;
2370

    
2371
    /**
2372
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2373
     * - encoding: Set by user.
2374
     * - decoding: unused.
2375
     */
2376
    float rc_max_available_vbv_use;
2377

    
2378
    /**
2379
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2380
     * - encoding: Set by user.
2381
     * - decoding: unused.
2382
     */
2383
    float rc_min_vbv_overflow_use;
2384

    
2385
    /**
2386
     * Hardware accelerator in use
2387
     * - encoding: unused.
2388
     * - decoding: Set by libavcodec
2389
     */
2390
    struct AVHWAccel *hwaccel;
2391

    
2392
    /**
2393
     * For some codecs, the time base is closer to the field rate than the frame rate.
2394
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2395
     * if no telecine is used ...
2396
     *
2397
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2398
     */
2399
    int ticks_per_frame;
2400

    
2401
    /**
2402
     * Hardware accelerator context.
2403
     * For some hardware accelerators, a global context needs to be
2404
     * provided by the user. In that case, this holds display-dependent
2405
     * data FFmpeg cannot instantiate itself. Please refer to the
2406
     * FFmpeg HW accelerator documentation to know how to fill this
2407
     * is. e.g. for VA API, this is a struct vaapi_context.
2408
     * - encoding: unused
2409
     * - decoding: Set by user
2410
     */
2411
    void *hwaccel_context;
2412
} AVCodecContext;
2413

    
2414
/**
2415
 * AVCodec.
2416
 */
2417
typedef struct AVCodec {
2418
    /**
2419
     * Name of the codec implementation.
2420
     * The name is globally unique among encoders and among decoders (but an
2421
     * encoder and a decoder can share the same name).
2422
     * This is the primary way to find a codec from the user perspective.
2423
     */
2424
    const char *name;
2425
    enum CodecType type;
2426
    enum CodecID id;
2427
    int priv_data_size;
2428
    int (*init)(AVCodecContext *);
2429
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2430
    int (*close)(AVCodecContext *);
2431
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2432
    /**
2433
     * Codec capabilities.
2434
     * see CODEC_CAP_*
2435
     */
2436
    int capabilities;
2437
    struct AVCodec *next;
2438
    /**
2439
     * Flush buffers.
2440
     * Will be called when seeking
2441
     */
2442
    void (*flush)(AVCodecContext *);
2443
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2444
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2445
    /**
2446
     * Descriptive name for the codec, meant to be more human readable than \p name.
2447
     * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it.
2448
     */
2449
    const char *long_name;
2450
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2451
    const enum SampleFormat *sample_fmts;   ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2452
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2453
} AVCodec;
2454

    
2455
/**
2456
 * AVHWAccel.
2457
 */
2458
typedef struct AVHWAccel {
2459
    /**
2460
     * Name of the hardware accelerated codec.
2461
     * The name is globally unique among encoders and among decoders (but an
2462
     * encoder and a decoder can share the same name).
2463
     */
2464
    const char *name;
2465

    
2466
    /**
2467
     * Type of codec implemented by the hardware accelerator.
2468
     *
2469
     * See CODEC_TYPE_xxx
2470
     */
2471
    enum CodecType type;
2472

    
2473
    /**
2474
     * Codec implemented by the hardware accelerator.
2475
     *
2476
     * See CODEC_ID_xxx
2477
     */
2478
    enum CodecID id;
2479

    
2480
    /**
2481
     * Supported pixel format.
2482
     *
2483
     * Only hardware accelerated formats are supported here.
2484
     */
2485
    enum PixelFormat pix_fmt;
2486

    
2487
    /**
2488
     * Hardware accelerated codec capabilities.
2489
     * see FF_HWACCEL_CODEC_CAP_*
2490
     */
2491
    int capabilities;
2492

    
2493
    struct AVHWAccel *next;
2494

    
2495
    /**
2496
     * Called at the beginning of each frame or field picture.
2497
     *
2498
     * Meaningful frame information (codec specific) is guaranteed to
2499
     * be parsed at this point. This function is mandatory.
2500
     *
2501
     * Note that \p buf can be NULL along with \p buf_size set to 0.
2502
     * Otherwise, this means the whole frame is available at this point.
2503
     *
2504
     * @param avctx the codec context
2505
     * @param buf the frame data buffer base
2506
     * @param buf_size the size of the frame in bytes
2507
     * @return zero if successful, a negative value otherwise
2508
     */
2509
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2510

    
2511
    /**
2512
     * Callback for each slice.
2513
     *
2514
     * Meaningful slice information (codec specific) is guaranteed to
2515
     * be parsed at this point. This function is mandatory.
2516
     *
2517
     * @param avctx the codec context
2518
     * @param buf the slice data buffer base
2519
     * @param buf_size the size of the slice in bytes
2520
     * @return zero if successful, a negative value otherwise
2521
     */
2522
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2523

    
2524
    /**
2525
     * Called at the end of each frame or field picture.
2526
     *
2527
     * The whole picture is parsed at this point and can now be sent
2528
     * to the hardware accelerator. This function is mandatory.
2529
     *
2530
     * @param avctx the codec context
2531
     * @return zero if successful, a negative value otherwise
2532
     */
2533
    int (*end_frame)(AVCodecContext *avctx);
2534

    
2535
    /**
2536
     * Size of HW accelerator private data.
2537
     *
2538
     * Private data is allocated with av_mallocz() before
2539
     * AVCodecContext.get_buffer() and deallocated after
2540
     * AVCodecContext.release_buffer().
2541
     */
2542
    int priv_data_size;
2543
} AVHWAccel;
2544

    
2545
/**
2546
 * four components are given, that's all.
2547
 * the last component is alpha
2548
 */
2549
typedef struct AVPicture {
2550
    uint8_t *data[4];
2551
    int linesize[4];       ///< number of bytes per line
2552
} AVPicture;
2553

    
2554
#if LIBAVCODEC_VERSION_MAJOR < 53
2555
/**
2556
 * @deprecated Use AVPacket to send palette changes instead.
2557
 */
2558
#define AVPALETTE_SIZE 1024
2559
#define AVPALETTE_COUNT 256
2560
typedef struct AVPaletteControl {
2561

    
2562
    /* Demuxer sets this to 1 to indicate the palette has changed;
2563
     * decoder resets to 0. */
2564
    int palette_changed;
2565

    
2566
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2567
     * the individual palette components should be on a 8-bit scale; if
2568
     * the palette data comes from an IBM VGA native format, the component
2569
     * data is probably 6 bits in size and needs to be scaled. */
2570
    unsigned int palette[AVPALETTE_COUNT];
2571

    
2572
} AVPaletteControl attribute_deprecated;
2573
#endif
2574

    
2575
enum AVSubtitleType {
2576
    SUBTITLE_NONE,
2577

    
2578
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
2579

    
2580
    /**
2581
     * Plain text, the text field must be set by the decoder and is
2582
     * authoritative. ass and pict fields may contain approximations.
2583
     */
2584
    SUBTITLE_TEXT,
2585

    
2586
    /**
2587
     * Formatted text, the ass field must be set by the decoder and is
2588
     * authoritative. pict and text fields may contain approximations.
2589
     */
2590
    SUBTITLE_ASS,
2591
};
2592

    
2593
typedef struct AVSubtitleRect {
2594
    int x;         ///< top left corner  of pict, undefined when pict is not set
2595
    int y;         ///< top left corner  of pict, undefined when pict is not set
2596
    int w;         ///< width            of pict, undefined when pict is not set
2597
    int h;         ///< height           of pict, undefined when pict is not set
2598
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
2599

    
2600
    /**
2601
     * data+linesize for the bitmap of this subtitle.
2602
     * can be set for text/ass as well once they where rendered
2603
     */
2604
    AVPicture pict;
2605
    enum AVSubtitleType type;
2606

    
2607
    char *text;                     ///< 0 terminated plain UTF-8 text
2608

    
2609
    /**
2610
     * 0 terminated ASS/SSA compatible event line.
2611
     * The pressentation of this is unaffected by the other values in this
2612
     * struct.
2613
     */
2614
    char *ass;
2615
} AVSubtitleRect;
2616

    
2617
typedef struct AVSubtitle {
2618
    uint16_t format; /* 0 = graphics */
2619
    uint32_t start_display_time; /* relative to packet pts, in ms */
2620
    uint32_t end_display_time; /* relative to packet pts, in ms */
2621
    unsigned num_rects;
2622
    AVSubtitleRect **rects;
2623
} AVSubtitle;
2624

    
2625
/* packet functions */
2626

    
2627
/**
2628
 * @deprecated use NULL instead
2629
 */
2630
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
2631

    
2632
/**
2633
 * Default packet destructor.
2634
 */
2635
void av_destruct_packet(AVPacket *pkt);
2636

    
2637
/**
2638
 * Initialize optional fields of a packet with default values.
2639
 *
2640
 * @param pkt packet
2641
 */
2642
void av_init_packet(AVPacket *pkt);
2643

    
2644
/**
2645
 * Allocate the payload of a packet and initialize its fields with
2646
 * default values.
2647
 *
2648
 * @param pkt packet
2649
 * @param size wanted payload size
2650
 * @return 0 if OK, AVERROR_xxx otherwise
2651
 */
2652
int av_new_packet(AVPacket *pkt, int size);
2653

    
2654
/**
2655
 * Reduce packet size, correctly zeroing padding
2656
 *
2657
 * @param pkt packet
2658
 * @param size new size
2659
 */
2660
void av_shrink_packet(AVPacket *pkt, int size);
2661

    
2662
/**
2663
 * @warning This is a hack - the packet memory allocation stuff is broken. The
2664
 * packet is allocated if it was not really allocated.
2665
 */
2666
int av_dup_packet(AVPacket *pkt);
2667

    
2668
/**
2669
 * Free a packet.
2670
 *
2671
 * @param pkt packet to free
2672
 */
2673
static inline void av_free_packet(AVPacket *pkt)
2674
{
2675
    if (pkt) {
2676
        if (pkt->destruct) pkt->destruct(pkt);
2677
        pkt->data = NULL; pkt->size = 0;
2678
    }
2679
}
2680

    
2681
/* resample.c */
2682

    
2683
struct ReSampleContext;
2684
struct AVResampleContext;
2685

    
2686
typedef struct ReSampleContext ReSampleContext;
2687

    
2688
#if LIBAVCODEC_VERSION_MAJOR < 53
2689
/**
2690
 * @deprecated Use av_audio_resample_init() instead.
2691
 */
2692
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2693
                                                          int output_rate, int input_rate);
2694
#endif
2695
/**
2696
 *  Initializes audio resampling context
2697
 *
2698
 * @param output_channels  number of output channels
2699
 * @param input_channels   number of input channels
2700
 * @param output_rate      output sample rate
2701
 * @param input_rate       input sample rate
2702
 * @param sample_fmt_out   requested output sample format
2703
 * @param sample_fmt_in    input sample format
2704
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff freq
2705
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2706
 * @param linear           If 1 then the used FIR filter will be linearly interpolated
2707
                           between the 2 closest, if 0 the closest will be used
2708
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
2709
 * @return allocated ReSampleContext, NULL if error occured
2710
 */
2711
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
2712
                                        int output_rate, int input_rate,
2713
                                        enum SampleFormat sample_fmt_out,
2714
                                        enum SampleFormat sample_fmt_in,
2715
                                        int filter_length, int log2_phase_count,
2716
                                        int linear, double cutoff);
2717

    
2718
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2719
void audio_resample_close(ReSampleContext *s);
2720

    
2721

    
2722
/**
2723
 * Initializes an audio resampler.
2724
 * Note, if either rate is not an integer then simply scale both rates up so they are.
2725
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
2726
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
2727
 * @param linear If 1 then the used FIR filter will be linearly interpolated
2728
                 between the 2 closest, if 0 the closest will be used
2729
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
2730
 */
2731
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2732

    
2733
/**
2734
 * resamples.
2735
 * @param src an array of unconsumed samples
2736
 * @param consumed the number of samples of src which have been consumed are returned here
2737
 * @param src_size the number of unconsumed samples available
2738
 * @param dst_size the amount of space in samples available in dst
2739
 * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
2740
 * @return the number of samples written in dst or -1 if an error occurred
2741
 */
2742
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2743

    
2744

    
2745
/**
2746
 * Compensates samplerate/timestamp drift. The compensation is done by changing
2747
 * the resampler parameters, so no audible clicks or similar distortions occur
2748
 * @param compensation_distance distance in output samples over which the compensation should be performed
2749
 * @param sample_delta number of output samples which should be output less
2750
 *
2751
 * example: av_resample_compensate(c, 10, 500)
2752
 * here instead of 510 samples only 500 samples would be output
2753
 *
2754
 * note, due to rounding the actual compensation might be slightly different,
2755
 * especially if the compensation_distance is large and the in_rate used during init is small
2756
 */
2757
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2758
void av_resample_close(struct AVResampleContext *c);
2759

    
2760
/**
2761
 * Allocate memory for a picture.  Call avpicture_free to free it.
2762
 *
2763
 * @param picture the picture to be filled in
2764
 * @param pix_fmt the format of the picture
2765
 * @param width the width of the picture
2766
 * @param height the height of the picture
2767
 * @return zero if successful, a negative value if not
2768
 */
2769
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
2770

    
2771
/**
2772
 * Free a picture previously allocated by avpicture_alloc().
2773
 *
2774
 * @param picture the AVPicture to be freed
2775
 */
2776
void avpicture_free(AVPicture *picture);
2777

    
2778
/**
2779
 * Fill in the AVPicture fields.
2780
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2781
 * which points to the image data buffer. Depending on the specified picture
2782
 * format, one or multiple image data pointers and line sizes will be set.
2783
 * If a planar format is specified, several pointers will be set pointing to
2784
 * the different picture planes and the line sizes of the different planes
2785
 * will be stored in the lines_sizes array.
2786
 * Call with ptr == NULL to get the required size for the ptr buffer.
2787
 *
2788
 * @param picture AVPicture whose fields are to be filled in
2789
 * @param ptr Buffer which will contain or contains the actual image data
2790
 * @param pix_fmt The format in which the picture data is stored.
2791
 * @param width the width of the image in pixels
2792
 * @param height the height of the image in pixels
2793
 * @return size of the image data in bytes
2794
 */
2795
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2796
                   int pix_fmt, int width, int height);
2797
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
2798
                     unsigned char *dest, int dest_size);
2799

    
2800
/**
2801
 * Calculate the size in bytes that a picture of the given width and height
2802
 * would occupy if stored in the given picture format.
2803
 * Note that this returns the size of a compact representation as generated
2804
 * by avpicture_layout, which can be smaller than the size required for e.g.
2805
 * avpicture_fill.
2806
 *
2807
 * @param pix_fmt the given picture format
2808
 * @param width the width of the image
2809
 * @param height the height of the image
2810
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
2811
 */
2812
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
2813
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
2814
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
2815
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2816

    
2817
/**
2818
 * Returns the pixel format corresponding to the name \p name.
2819
 *
2820
 * If there is no pixel format with name \p name, then looks for a
2821
 * pixel format with the name corresponding to the native endian
2822
 * format of \p name.
2823
 * For example in a little-endian system, first looks for "gray16",
2824
 * then for "gray16le".
2825
 *
2826
 * Finally if no pixel format has been found, returns \c PIX_FMT_NONE.
2827
 */
2828
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2829
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2830

    
2831
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2832
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2833
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2834
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2835
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2836
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2837

    
2838
/**
2839
 * Computes what kind of losses will occur when converting from one specific
2840
 * pixel format to another.
2841
 * When converting from one pixel format to another, information loss may occur.
2842
 * For example, when converting from RGB24 to GRAY, the color information will
2843
 * be lost. Similarly, other losses occur when converting from some formats to
2844
 * other formats. These losses can involve loss of chroma, but also loss of
2845
 * resolution, loss of color depth, loss due to the color space conversion, loss
2846
 * of the alpha bits or loss due to color quantization.
2847
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2848
 * which will occur when converting from one pixel format to another.
2849
 *
2850
 * @param[in] dst_pix_fmt destination pixel format
2851
 * @param[in] src_pix_fmt source pixel format
2852
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2853
 * @return Combination of flags informing you what kind of losses will occur.
2854
 */
2855
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
2856
                             int has_alpha);
2857

    
2858
/**
2859
 * Finds the best pixel format to convert to given a certain source pixel
2860
 * format.  When converting from one pixel format to another, information loss
2861
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2862
 * information will be lost. Similarly, other losses occur when converting from
2863
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2864
 * the given pixel formats should be used to suffer the least amount of loss.
2865
 * The pixel formats from which it chooses one, are determined by the
2866
 * \p pix_fmt_mask parameter.
2867
 *
2868
 * @code
2869
 * src_pix_fmt = PIX_FMT_YUV420P;
2870
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2871
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2872
 * @endcode
2873
 *
2874
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2875
 * @param[in] src_pix_fmt source pixel format
2876
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2877
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2878
 * @return The best pixel format to convert to or -1 if none was found.
2879
 */
2880
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
2881
                              int has_alpha, int *loss_ptr);
2882

    
2883

    
2884
/**
2885
 * Print in buf the string corresponding to the pixel format with
2886
 * number pix_fmt, or an header if pix_fmt is negative.
2887
 *
2888
 * @param[in] buf the buffer where to write the string
2889
 * @param[in] buf_size the size of buf
2890
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2891
 * a negative value to print the corresponding header.
2892
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2893
 */
2894
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
2895

    
2896
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2897
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2898

    
2899
/**
2900
 * Tell if an image really has transparent alpha values.
2901
 * @return ored mask of FF_ALPHA_xxx constants
2902
 */
2903
int img_get_alpha_info(const AVPicture *src,
2904
                       enum PixelFormat pix_fmt, int width, int height);
2905

    
2906
/* deinterlace a picture */
2907
/* deinterlace - if not supported return -1 */
2908
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2909
                          enum PixelFormat pix_fmt, int width, int height);
2910

    
2911
/* external high level API */
2912

    
2913
/**
2914
 * If c is NULL, returns the first registered codec,
2915
 * if c is non-NULL, returns the next registered codec after c,
2916
 * or NULL if c is the last one.
2917
 */
2918
AVCodec *av_codec_next(AVCodec *c);
2919

    
2920
/**
2921
 * Returns the LIBAVCODEC_VERSION_INT constant.
2922
 */
2923
unsigned avcodec_version(void);
2924

    
2925
/**
2926
 * Initializes libavcodec.
2927
 *
2928
 * @warning This function \e must be called before any other libavcodec
2929
 * function.
2930
 */
2931
void avcodec_init(void);
2932

    
2933
#if LIBAVCODEC_VERSION_MAJOR < 53
2934
/**
2935
 * @deprecated Deprecated in favor of avcodec_register().
2936
 */
2937
attribute_deprecated void register_avcodec(AVCodec *codec);
2938
#endif
2939

    
2940
/**
2941
 * Register the codec \p codec and initialize libavcodec.
2942
 *
2943
 * @see avcodec_init()
2944
 */
2945
void avcodec_register(AVCodec *codec);
2946

    
2947
/**
2948
 * Finds a registered encoder with a matching codec ID.
2949
 *
2950
 * @param id CodecID of the requested encoder
2951
 * @return An encoder if one was found, NULL otherwise.
2952
 */
2953
AVCodec *avcodec_find_encoder(enum CodecID id);
2954

    
2955
/**
2956
 * Finds a registered encoder with the specified name.
2957
 *
2958
 * @param name name of the requested encoder
2959
 * @return An encoder if one was found, NULL otherwise.
2960
 */
2961
AVCodec *avcodec_find_encoder_by_name(const char *name);
2962

    
2963
/**
2964
 * Finds a registered decoder with a matching codec ID.
2965
 *
2966
 * @param id CodecID of the requested decoder
2967
 * @return A decoder if one was found, NULL otherwise.
2968
 */
2969
AVCodec *avcodec_find_decoder(enum CodecID id);
2970

    
2971
/**
2972
 * Finds a registered decoder with the specified name.
2973
 *
2974
 * @param name name of the requested decoder
2975
 * @return A decoder if one was found, NULL otherwise.
2976
 */
2977
AVCodec *avcodec_find_decoder_by_name(const char *name);
2978
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2979

    
2980
/**
2981
 * Sets the fields of the given AVCodecContext to default values.
2982
 *
2983
 * @param s The AVCodecContext of which the fields should be set to default values.
2984
 */
2985
void avcodec_get_context_defaults(AVCodecContext *s);
2986

    
2987
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2988
 *  we WILL change its arguments and name a few times! */
2989
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2990

    
2991
/**
2992
 * Allocates an AVCodecContext and sets its fields to default values.  The
2993
 * resulting struct can be deallocated by simply calling av_free().
2994
 *
2995
 * @return An AVCodecContext filled with default values or NULL on failure.
2996
 * @see avcodec_get_context_defaults
2997
 */
2998
AVCodecContext *avcodec_alloc_context(void);
2999

    
3000
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3001
 *  we WILL change its arguments and name a few times! */
3002
AVCodecContext *avcodec_alloc_context2(enum CodecType);
3003

    
3004
/**
3005
 * Sets the fields of the given AVFrame to default values.
3006
 *
3007
 * @param pic The AVFrame of which the fields should be set to default values.
3008
 */
3009
void avcodec_get_frame_defaults(AVFrame *pic);
3010

    
3011
/**
3012
 * Allocates an AVFrame and sets its fields to default values.  The resulting
3013
 * struct can be deallocated by simply calling av_free().
3014
 *
3015
 * @return An AVFrame filled with default values or NULL on failure.
3016
 * @see avcodec_get_frame_defaults
3017
 */
3018
AVFrame *avcodec_alloc_frame(void);
3019

    
3020
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3021
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3022
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3023
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3024

    
3025
/**
3026
 * Checks if the given dimension of a picture is valid, meaning that all
3027
 * bytes of the picture can be addressed with a signed int.
3028
 *
3029
 * @param[in] w Width of the picture.
3030
 * @param[in] h Height of the picture.
3031
 * @return Zero if valid, a negative value if invalid.
3032
 */
3033
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3034
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3035

    
3036
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3037
void avcodec_thread_free(AVCodecContext *s);
3038
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3039
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3040
//FIXME func typedef
3041

    
3042
/**
3043
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
3044
 * function the context has to be allocated.
3045
 *
3046
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3047
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3048
 * retrieving a codec.
3049
 *
3050
 * @warning This function is not thread safe!
3051
 *
3052
 * @code
3053
 * avcodec_register_all();
3054
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3055
 * if (!codec)
3056
 *     exit(1);
3057
 *
3058
 * context = avcodec_alloc_context();
3059
 *
3060
 * if (avcodec_open(context, codec) < 0)
3061
 *     exit(1);
3062
 * @endcode
3063
 *
3064
 * @param avctx The context which will be set up to use the given codec.
3065
 * @param codec The codec to use within the context.
3066
 * @return zero on success, a negative value on error
3067
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3068
 */
3069
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3070

    
3071
#if LIBAVCODEC_VERSION_MAJOR < 53
3072
/**
3073
 * @deprecated Use avcodec_decode_audio3 instead.
3074
 */
3075
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3076
                         int *frame_size_ptr,
3077
                         const uint8_t *buf, int buf_size);
3078
#endif
3079

    
3080
/**
3081
 * Decodes the audio frame of size avpkt->size from avpkt->data into samples.
3082
 * Some decoders may support multiple frames in a single AVPacket, such
3083
 * decoders would then just decode the first frame.
3084
 * If no frame
3085
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
3086
 * decompressed frame size in \e bytes.
3087
 *
3088
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
3089
 * output buffer before calling avcodec_decode_audio3().
3090
 *
3091
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
3092
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3093
 * bits at once and could read over the end.
3094
 *
3095
 * @warning The end of the input buffer \p avpkt->data should be set to 0 to ensure that
3096
 * no overreading happens for damaged MPEG streams.
3097
 *
3098
 * @note You might have to align the input buffer \p avpkt->data and output buffer \p
3099
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3100
 * necessary at all, on others it won't work at all if not aligned and on others
3101
 * it will work but it will have an impact on performance. In practice, the
3102
 * bitstream should have 4 byte alignment at minimum and all sample data should
3103
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
3104
 * the linesize is not a multiple of 16 then there's no sense in aligning the
3105
 * start of the buffer to 16.
3106
 *
3107
 * @param avctx the codec context
3108
 * @param[out] samples the output buffer
3109
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3110
 * @param[in] avpkt The input AVPacket containing the input buffer.
3111
 * @return On error a negative value is returned, otherwise the number of bytes
3112
 * used or zero if no frame could be decompressed.
3113
 */
3114
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3115
                         int *frame_size_ptr,
3116
                         AVPacket *avpkt);
3117

    
3118
#if LIBAVCODEC_VERSION_MAJOR < 53
3119
/**
3120
 * @deprecated Use avcodec_decode_video2 instead.
3121
 */
3122
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3123
                         int *got_picture_ptr,
3124
                         const uint8_t *buf, int buf_size);
3125
#endif
3126

    
3127
/**
3128
 * Decodes the video frame of size avpkt->size from avpkt->data into picture.
3129
 * Some decoders may support multiple frames in a single AVPacket, such
3130
 * decoders would then just decode the first frame.
3131
 *
3132
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
3133
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3134
 * bits at once and could read over the end.
3135
 *
3136
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
3137
 * no overreading happens for damaged MPEG streams.
3138
 *
3139
 * @note You might have to align the input buffer \p avpkt->data and output buffer \p
3140
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
3141
 * necessary at all, on others it won't work at all if not aligned and on others
3142
 * it will work but it will have an impact on performance. In practice, the
3143
 * bitstream should have 4 byte alignment at minimum and all sample data should
3144
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
3145
 * the linesize is not a multiple of 16 then there's no sense in aligning the
3146
 * start of the buffer to 16.
3147
 *
3148
 * @note Some codecs have a delay between input and output, these need to be
3149
 * feeded with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3150
 *
3151
 * @param avctx the codec context
3152
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3153
 * @param[in] avpkt The input AVpacket containing the input buffer.
3154
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3155
 * @return On error a negative value is returned, otherwise the number of bytes
3156
 * used or zero if no frame could be decompressed.
3157
 */
3158
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3159
                         int *got_picture_ptr,
3160
                         AVPacket *avpkt);
3161

    
3162
#if LIBAVCODEC_VERSION_MAJOR < 53
3163
/* Decode a subtitle message. Return -1 if error, otherwise return the
3164
 * number of bytes used. If no subtitle could be decompressed,
3165
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3166
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3167
                            int *got_sub_ptr,
3168
                            const uint8_t *buf, int buf_size);
3169
#endif
3170

    
3171
/**
3172
 * Decodes a subtitle message.
3173
 * Returns a negative value on error, otherwise returns the number of bytes used.
3174
 * If no subtitle could be decompressed, \p got_sub_ptr is zero.
3175
 * Otherwise, the subtitle is stored in \p *sub.
3176
 *
3177
 * @param avctx the codec context
3178
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
3179
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3180
 * @param[in] avpkt The input AVPacket containing the input buffer.
3181
 */
3182
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3183
                            int *got_sub_ptr,
3184
                            AVPacket *avpkt);
3185
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3186
                        int *data_size_ptr,
3187
                        uint8_t *buf, int buf_size);
3188

    
3189
/**
3190
 * Encodes an audio frame from \p samples into \p buf.
3191
 * The avcodec_encode_audio() function encodes an audio frame from the input
3192
 * buffer \p samples. To encode it, it makes use of the audio codec which was
3193
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
3194
 * stored in output buffer \p buf.
3195
 *
3196
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
3197
 * However, for PCM audio the user will know how much space is needed
3198
 * because it depends on the value passed in \p buf_size as described
3199
 * below. In that case a lower value can be used.
3200
 *
3201
 * @param avctx the codec context
3202
 * @param[out] buf the output buffer
3203
 * @param[in] buf_size the output buffer size
3204
 * @param[in] samples the input buffer containing the samples
3205
 * The number of samples read from this buffer is frame_size*channels,
3206
 * both of which are defined in \p avctx.
3207
 * For PCM audio the number of samples read from \p samples is equal to
3208
 * \p buf_size * input_sample_size / output_sample_size.
3209
 * @return On error a negative value is returned, on success zero or the number
3210
 * of bytes used to encode the data read from the input buffer.
3211
 */
3212
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3213
                         const short *samples);
3214

    
3215
/**
3216
 * Encodes a video frame from \p pict into \p buf.
3217
 * The avcodec_encode_video() function encodes a video frame from the input
3218
 * \p pict. To encode it, it makes use of the video codec which was coupled with
3219
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
3220
 * frame are stored in the output buffer \p buf. The input picture should be
3221
 * stored using a specific format, namely \c avctx.pix_fmt.
3222
 *
3223
 * @param avctx the codec context
3224
 * @param[out] buf the output buffer for the bitstream of encoded frame
3225
 * @param[in] buf_size the size of the output buffer in bytes
3226
 * @param[in] pict the input picture to encode
3227
 * @return On error a negative value is returned, on success zero or the number
3228
 * of bytes used from the output buffer.
3229
 */
3230
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3231
                         const AVFrame *pict);
3232
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3233
                            const AVSubtitle *sub);
3234

    
3235
int avcodec_close(AVCodecContext *avctx);
3236

    
3237
/**
3238
 * Register all the codecs, parsers and bitstream filters which were enabled at
3239
 * configuration time. If you do not call this function you can select exactly
3240
 * which formats you want to support, by using the individual registration
3241
 * functions.
3242
 *
3243
 * @see avcodec_register
3244
 * @see av_register_codec_parser
3245
 * @see av_register_bitstream_filter
3246
 */
3247
void avcodec_register_all(void);
3248

    
3249
/**
3250
 * Flush buffers, should be called when seeking or when switching to a different stream.
3251
 */
3252
void avcodec_flush_buffers(AVCodecContext *avctx);
3253

    
3254
void avcodec_default_free_buffers(AVCodecContext *s);
3255

    
3256
/* misc useful functions */
3257

    
3258
/**
3259
 * Returns a single letter to describe the given picture type \p pict_type.
3260
 *
3261
 * @param[in] pict_type the picture type
3262
 * @return A single character representing the picture type.
3263
 */
3264
char av_get_pict_type_char(int pict_type);
3265

    
3266
/**
3267
 * Returns codec bits per sample.
3268
 *
3269
 * @param[in] codec_id the codec
3270
 * @return Number of bits per sample or zero if unknown for the given codec.
3271
 */
3272
int av_get_bits_per_sample(enum CodecID codec_id);
3273

    
3274
/**
3275
 * Returns sample format bits per sample.
3276
 *
3277
 * @param[in] sample_fmt the sample format
3278
 * @return Number of bits per sample or zero if unknown for the given sample format.
3279
 */
3280
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
3281

    
3282
/* frame parsing */
3283
typedef struct AVCodecParserContext {
3284
    void *priv_data;
3285
    struct AVCodecParser *parser;
3286
    int64_t frame_offset; /* offset of the current frame */
3287
    int64_t cur_offset; /* current offset
3288
                           (incremented by each av_parser_parse()) */
3289
    int64_t next_frame_offset; /* offset of the next frame */
3290
    /* video info */
3291
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3292
    /**
3293
     * This field is used for proper frame duration computation in lavf.
3294
     * It signals, how much longer the frame duration of the current frame
3295
     * is compared to normal frame duration.
3296
     *
3297
     * frame_duration = (1 + repeat_pict) * time_base
3298
     *
3299
     * It is used by codecs like H.264 to display telecined material.
3300
     */
3301
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3302
    int64_t pts;     /* pts of the current frame */
3303
    int64_t dts;     /* dts of the current frame */
3304

    
3305
    /* private data */
3306
    int64_t last_pts;
3307
    int64_t last_dts;
3308
    int fetch_timestamp;
3309

    
3310
#define AV_PARSER_PTS_NB 4
3311
    int cur_frame_start_index;
3312
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3313
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3314
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3315

    
3316
    int flags;
3317
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3318

    
3319
    int64_t offset;      ///< byte offset from starting packet start
3320
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3321

    
3322
    /*!
3323
     * Set by parser to 1 for key frames and 0 for non-key frames.
3324
     * It is initialized to -1, so if the parser doesn't set this flag,
3325
     * old-style fallback using FF_I_TYPE picture type as key frames
3326
     * will be used.
3327
     */
3328
    int key_frame;
3329

    
3330
    /**
3331
     * Time difference in stream time base units from the pts of this
3332
     * packet to the point at which the output from the decoder has converged
3333
     * independent from the availability of previous frames. That is, the
3334
     * frames are virtually identical no matter if decoding started from
3335
     * the very first frame or from this keyframe.
3336
     * Is AV_NOPTS_VALUE if unknown.
3337
     * This field is not the display duration of the current frame.
3338
     *
3339
     * The purpose of this field is to allow seeking in streams that have no
3340
     * keyframes in the conventional sense. It corresponds to the
3341
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3342
     * essential for some types of subtitle streams to ensure that all
3343
     * subtitles are correctly displayed after seeking.
3344
     */
3345
    int64_t convergence_duration;
3346

    
3347
    // Timestamp generation support:
3348
    /**
3349
     * Synchronization point for start of timestamp generation.
3350
     *
3351
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3352
     * (default).
3353
     *
3354
     * For example, this corresponds to presence of H.264 buffering period
3355
     * SEI message.
3356
     */
3357
    int dts_sync_point;
3358

    
3359
    /**
3360
     * Offset of the current timestamp against last timestamp sync point in
3361
     * units of AVCodecContext.time_base.
3362
     *
3363
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3364
     * contain a valid timestamp offset.
3365
     *
3366
     * Note that the timestamp of sync point has usually a nonzero
3367
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3368
     * the next frame after timestamp sync point will be usually 1.
3369
     *
3370
     * For example, this corresponds to H.264 cpb_removal_delay.
3371
     */
3372
    int dts_ref_dts_delta;
3373

    
3374
    /**
3375
     * Presentation delay of current frame in units of AVCodecContext.time_base.
3376
     *
3377
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3378
     * contain valid non-negative timestamp delta (presentation time of a frame
3379
     * must not lie in the past).
3380
     *
3381
     * This delay represents the difference between decoding and presentation
3382
     * time of the frame.
3383
     *
3384
     * For example, this corresponds to H.264 dpb_output_delay.
3385
     */
3386
    int pts_dts_delta;
3387

    
3388
    /**
3389
     * Position of the packet in file.
3390
     *
3391
     * Analogous to cur_frame_pts/dts
3392
     */
3393
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3394

    
3395
    /**
3396
     * Byte position of currently parsed frame in stream.
3397
     */
3398
    int64_t pos;
3399

    
3400
    /**
3401
     * Previous frame byte position.
3402
     */
3403
    int64_t last_pos;
3404
} AVCodecParserContext;
3405

    
3406
typedef struct AVCodecParser {
3407
    int codec_ids[5]; /* several codec IDs are permitted */
3408
    int priv_data_size;
3409
    int (*parser_init)(AVCodecParserContext *s);
3410
    int (*parser_parse)(AVCodecParserContext *s,
3411
                        AVCodecContext *avctx,
3412
                        const uint8_t **poutbuf, int *poutbuf_size,
3413
                        const uint8_t *buf, int buf_size);
3414
    void (*parser_close)(AVCodecParserContext *s);
3415
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3416
    struct AVCodecParser *next;
3417
} AVCodecParser;
3418

    
3419
AVCodecParser *av_parser_next(AVCodecParser *c);
3420

    
3421
void av_register_codec_parser(AVCodecParser *parser);
3422
AVCodecParserContext *av_parser_init(int codec_id);
3423

    
3424
#if LIBAVCODEC_VERSION_MAJOR < 53
3425
attribute_deprecated
3426
int av_parser_parse(AVCodecParserContext *s,
3427
                    AVCodecContext *avctx,
3428
                    uint8_t **poutbuf, int *poutbuf_size,
3429
                    const uint8_t *buf, int buf_size,
3430
                    int64_t pts, int64_t dts);
3431
#endif
3432

    
3433
/**
3434
 * Parse a packet.
3435
 *
3436
 * @param s             parser context.
3437
 * @param avctx         codec context.
3438
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
3439
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
3440
 * @param buf           input buffer.
3441
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
3442
 * @param pts           input presentation timestamp.
3443
 * @param dts           input decoding timestamp.
3444
 * @param pos           input byte position in stream.
3445
 * @return the number of bytes of the input bitstream used.
3446
 *
3447
 * Example:
3448
 * @code
3449
 *   while(in_len){
3450
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
3451
 *                                        in_data, in_len,
3452
 *                                        pts, dts, pos);
3453
 *       in_data += len;
3454
 *       in_len  -= len;
3455
 *
3456
 *       if(size)
3457
 *          decode_frame(data, size);
3458
 *   }
3459
 * @endcode
3460
 */
3461
int av_parser_parse2(AVCodecParserContext *s,
3462
                     AVCodecContext *avctx,
3463
                     uint8_t **poutbuf, int *poutbuf_size,
3464
                     const uint8_t *buf, int buf_size,
3465
                     int64_t pts, int64_t dts,
3466
                     int64_t pos);
3467

    
3468
int av_parser_change(AVCodecParserContext *s,
3469
                     AVCodecContext *avctx,
3470
                     uint8_t **poutbuf, int *poutbuf_size,
3471
                     const uint8_t *buf, int buf_size, int keyframe);
3472
void av_parser_close(AVCodecParserContext *s);
3473

    
3474

    
3475
typedef struct AVBitStreamFilterContext {
3476
    void *priv_data;
3477
    struct AVBitStreamFilter *filter;
3478
    AVCodecParserContext *parser;
3479
    struct AVBitStreamFilterContext *next;
3480
} AVBitStreamFilterContext;
3481

    
3482

    
3483
typedef struct AVBitStreamFilter {
3484
    const char *name;
3485
    int priv_data_size;
3486
    int (*filter)(AVBitStreamFilterContext *bsfc,
3487
                  AVCodecContext *avctx, const char *args,
3488
                  uint8_t **poutbuf, int *poutbuf_size,
3489
                  const uint8_t *buf, int buf_size, int keyframe);
3490
    void (*close)(AVBitStreamFilterContext *bsfc);
3491
    struct AVBitStreamFilter *next;
3492
} AVBitStreamFilter;
3493

    
3494
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3495
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3496
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3497
                               AVCodecContext *avctx, const char *args,
3498
                               uint8_t **poutbuf, int *poutbuf_size,
3499
                               const uint8_t *buf, int buf_size, int keyframe);
3500
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
3501

    
3502
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
3503

    
3504
/* memory */
3505

    
3506
/**
3507
 * Reallocates the given block if it is not large enough, otherwise it
3508
 * does nothing.
3509
 *
3510
 * @see av_realloc
3511
 */
3512
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3513

    
3514
/**
3515
 * Allocates a buffer, reusing the given one if large enough.
3516
 *
3517
 * Contrary to av_fast_realloc the current buffer contents might not be
3518
 * preserved and on error the old buffer is freed, thus no special
3519
 * handling to avoid memleaks is necessary.
3520
 *
3521
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
3522
 * @param size size of the buffer *ptr points to
3523
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
3524
 *                 *size 0 if an error occurred.
3525
 */
3526
void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size);
3527

    
3528
/**
3529
 * Copy image 'src' to 'dst'.
3530
 */
3531
void av_picture_copy(AVPicture *dst, const AVPicture *src,
3532
                     enum PixelFormat pix_fmt, int width, int height);
3533

    
3534
/**
3535
 * Crop image top and left side.
3536
 */
3537
int av_picture_crop(AVPicture *dst, const AVPicture *src,
3538
                    enum PixelFormat pix_fmt, int top_band, int left_band);
3539

    
3540
/**
3541
 * Pad image.
3542
 */
3543
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
3544
            int padtop, int padbottom, int padleft, int padright, int *color);
3545

    
3546
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3547

    
3548
/**
3549
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
3550
 *
3551
 * @return 0 in case of a successful parsing, a negative value otherwise
3552
 * @param[in] str the string to parse: it has to be a string in the format
3553
 * <width>x<height> or a valid video frame size abbreviation.
3554
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
3555
 * frame width value
3556
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
3557
 * frame height value
3558
 */
3559
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
3560

    
3561
/**
3562
 * Parses \p str and put in \p frame_rate the detected values.
3563
 *
3564
 * @return 0 in case of a successful parsing, a negative value otherwise
3565
 * @param[in] str the string to parse: it has to be a string in the format
3566
 * <frame_rate_num>/<frame_rate_den>, a float number or a valid video rate abbreviation
3567
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
3568
 * frame rate
3569
 */
3570
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
3571

    
3572
/* error handling */
3573
#if EINVAL > 0
3574
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3575
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3576
#else
3577
/* Some platforms have E* and errno already negated. */
3578
#define AVERROR(e) (e)
3579
#define AVUNERROR(e) (e)
3580
#endif
3581
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3582
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3583
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3584
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3585
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3586
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3587
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3588
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3589
#define AVERROR_EOF         AVERROR(EPIPE)   /**< End of file. */
3590
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3591

    
3592
/**
3593
 * Registers the hardware accelerator \p hwaccel.
3594
 */
3595
void av_register_hwaccel(AVHWAccel *hwaccel);
3596

    
3597
/**
3598
 * If hwaccel is NULL, returns the first registered hardware accelerator,
3599
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
3600
 * after hwaccel, or NULL if hwaccel is the last one.
3601
 */
3602
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
3603

    
3604
#endif /* AVCODEC_AVCODEC_H */