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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
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 * external API header
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 */
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#include <errno.h>
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#include "libavcore/samplefmt.h"
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#include "libavutil/avutil.h"
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#include "libavutil/cpu.h"
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#define LIBAVCODEC_VERSION_MAJOR 52
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#define LIBAVCODEC_VERSION_MINOR 108
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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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/**
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 * Those FF_API_* defines are not part of public API.
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 * They may change, break or disappear at any time.
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 */
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#ifndef FF_API_PALETTE_CONTROL
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#define FF_API_PALETTE_CONTROL  (LIBAVCODEC_VERSION_MAJOR < 54)
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#endif
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#ifndef FF_API_MM_FLAGS
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#define FF_API_MM_FLAGS         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OPT_SHOW
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#define FF_API_OPT_SHOW         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_AUDIO_OLD
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#define FF_API_AUDIO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_VIDEO_OLD
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#define FF_API_VIDEO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SUBTITLE_OLD
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#define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_USE_LPC
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#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SET_STRING_OLD
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#define FF_API_SET_STRING_OLD   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_INOFFICIAL
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#define FF_API_INOFFICIAL       (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_SAMPLE_FMT
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#define FF_API_OLD_SAMPLE_FMT   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_AUDIOCONVERT
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#define FF_API_OLD_AUDIOCONVERT (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#   define FF_INTERNALC_MEM_TYPE unsigned int
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#else
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#   define FF_INTERNALC_MEM_TYPE size_t
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#endif
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/**
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 * Identify 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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#if LIBAVCODEC_VERSION_MAJOR < 53
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    CODEC_ID_XVID,
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#endif
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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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    CODEC_ID_TMV,
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    CODEC_ID_V210,
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    CODEC_ID_DPX,
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    CODEC_ID_MAD,
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    CODEC_ID_FRWU,
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    CODEC_ID_FLASHSV2,
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    CODEC_ID_CDGRAPHICS,
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    CODEC_ID_R210,
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    CODEC_ID_ANM,
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    CODEC_ID_BINKVIDEO,
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    CODEC_ID_IFF_ILBM,
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    CODEC_ID_IFF_BYTERUN1,
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    CODEC_ID_KGV1,
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    CODEC_ID_YOP,
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    CODEC_ID_VP8,
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    CODEC_ID_PICTOR,
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    CODEC_ID_ANSI,
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    CODEC_ID_A64_MULTI,
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    CODEC_ID_A64_MULTI5,
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    CODEC_ID_R10K,
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    CODEC_ID_MXPEG,
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    CODEC_ID_LAGARITH,
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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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    CODEC_ID_PCM_BLURAY,
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    CODEC_ID_PCM_LXF,
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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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    CODEC_ID_ADPCM_G722,
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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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    CODEC_ID_ATRAC1,
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    CODEC_ID_BINKAUDIO_RDFT,
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    CODEC_ID_BINKAUDIO_DCT,
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    CODEC_ID_AAC_LATM,
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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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    CODEC_ID_HDMV_PGS_SUBTITLE,
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    CODEC_ID_DVB_TELETEXT,
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    CODEC_ID_SRT,
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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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    CODEC_ID_FFMETADATA=0x21000,   ///< Dummy codec for streams containing only metadata information.
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};
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#define CodecType AVMediaType
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#define CODEC_TYPE_UNKNOWN    AVMEDIA_TYPE_UNKNOWN
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#define CODEC_TYPE_VIDEO      AVMEDIA_TYPE_VIDEO
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#define CODEC_TYPE_AUDIO      AVMEDIA_TYPE_AUDIO
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#define CODEC_TYPE_DATA       AVMEDIA_TYPE_DATA
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#define CODEC_TYPE_SUBTITLE   AVMEDIA_TYPE_SUBTITLE
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#define CODEC_TYPE_ATTACHMENT AVMEDIA_TYPE_ATTACHMENT
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#define CODEC_TYPE_NB         AVMEDIA_TYPE_NB
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#endif
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#if FF_API_OLD_SAMPLE_FMT
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#define SampleFormat AVSampleFormat
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#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE
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#define SAMPLE_FMT_U8   AV_SAMPLE_FMT_U8
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#define SAMPLE_FMT_S16  AV_SAMPLE_FMT_S16
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#define SAMPLE_FMT_S32  AV_SAMPLE_FMT_S32
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#define SAMPLE_FMT_FLT  AV_SAMPLE_FMT_FLT
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#define SAMPLE_FMT_DBL  AV_SAMPLE_FMT_DBL
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#define SAMPLE_FMT_NB   AV_SAMPLE_FMT_NB
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#endif
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#if FF_API_OLD_AUDIOCONVERT
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#include "libavcore/audioconvert.h"
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/* Audio channel masks */
441
#define CH_FRONT_LEFT            AV_CH_FRONT_LEFT
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#define CH_FRONT_RIGHT           AV_CH_FRONT_RIGHT
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#define CH_FRONT_CENTER          AV_CH_FRONT_CENTER
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#define CH_LOW_FREQUENCY         AV_CH_LOW_FREQUENCY
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#define CH_BACK_LEFT             AV_CH_BACK_LEFT
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#define CH_BACK_RIGHT            AV_CH_BACK_RIGHT
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#define CH_FRONT_LEFT_OF_CENTER  AV_CH_FRONT_LEFT_OF_CENTER
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#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER
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#define CH_BACK_CENTER           AV_CH_BACK_CENTER
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#define CH_SIDE_LEFT             AV_CH_SIDE_LEFT
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#define CH_SIDE_RIGHT            AV_CH_SIDE_RIGHT
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#define CH_TOP_CENTER            AV_CH_TOP_CENTER
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#define CH_TOP_FRONT_LEFT        AV_CH_TOP_FRONT_LEFT
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#define CH_TOP_FRONT_CENTER      AV_CH_TOP_FRONT_CENTER
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#define CH_TOP_FRONT_RIGHT       AV_CH_TOP_FRONT_RIGHT
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#define CH_TOP_BACK_LEFT         AV_CH_TOP_BACK_LEFT
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#define CH_TOP_BACK_CENTER       AV_CH_TOP_BACK_CENTER
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#define CH_TOP_BACK_RIGHT        AV_CH_TOP_BACK_RIGHT
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#define CH_STEREO_LEFT           AV_CH_STEREO_LEFT
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#define CH_STEREO_RIGHT          AV_CH_STEREO_RIGHT
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/** Channel mask value used for AVCodecContext.request_channel_layout
463
    to indicate that the user requests the channel order of the decoder output
464
    to be the native codec channel order. */
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#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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467
/* Audio channel convenience macros */
468
#define CH_LAYOUT_MONO           AV_CH_LAYOUT_MONO
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#define CH_LAYOUT_STEREO         AV_CH_LAYOUT_STEREO
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#define CH_LAYOUT_2_1            AV_CH_LAYOUT_2_1
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#define CH_LAYOUT_SURROUND       AV_CH_LAYOUT_SURROUND
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#define CH_LAYOUT_4POINT0        AV_CH_LAYOUT_4POINT0
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#define CH_LAYOUT_2_2            AV_CH_LAYOUT_2_2
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#define CH_LAYOUT_QUAD           AV_CH_LAYOUT_QUAD
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#define CH_LAYOUT_5POINT0        AV_CH_LAYOUT_5POINT0
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#define CH_LAYOUT_5POINT1        AV_CH_LAYOUT_5POINT1
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#define CH_LAYOUT_5POINT0_BACK   AV_CH_LAYOUT_5POINT0_BACK
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#define CH_LAYOUT_5POINT1_BACK   AV_CH_LAYOUT_5POINT1_BACK
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#define CH_LAYOUT_7POINT0        AV_CH_LAYOUT_7POINT0
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#define CH_LAYOUT_7POINT1        AV_CH_LAYOUT_7POINT1
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#define CH_LAYOUT_7POINT1_WIDE   AV_CH_LAYOUT_7POINT1_WIDE
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#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX
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#endif
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/* in bytes */
486
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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488
/**
489
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
490
 * This is mainly needed because some optimized bitstream readers read
491
 * 32 or 64 bit at once and could read over the end.<br>
492
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
493
 * MPEG bitstreams could cause overread and segfault.
494
 */
495
#define FF_INPUT_BUFFER_PADDING_SIZE 8
496

    
497
/**
498
 * minimum encoding buffer size
499
 * Used to avoid some checks during header writing.
500
 */
501
#define FF_MIN_BUFFER_SIZE 16384
502

    
503

    
504
/**
505
 * motion estimation type.
506
 */
507
enum Motion_Est_ID {
508
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
509
    ME_FULL,
510
    ME_LOG,
511
    ME_PHODS,
512
    ME_EPZS,        ///< enhanced predictive zonal search
513
    ME_X1,          ///< reserved for experiments
514
    ME_HEX,         ///< hexagon based search
515
    ME_UMH,         ///< uneven multi-hexagon search
516
    ME_ITER,        ///< iterative search
517
    ME_TESA,        ///< transformed exhaustive search algorithm
518
};
519

    
520
enum AVDiscard{
521
    /* We leave some space between them for extensions (drop some
522
     * keyframes for intra-only or drop just some bidir frames). */
523
    AVDISCARD_NONE   =-16, ///< discard nothing
524
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
525
    AVDISCARD_NONREF =  8, ///< discard all non reference
526
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
527
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
528
    AVDISCARD_ALL    = 48, ///< discard all
529
};
530

    
531
enum AVColorPrimaries{
532
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
533
    AVCOL_PRI_UNSPECIFIED=2,
534
    AVCOL_PRI_BT470M     =4,
535
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
536
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
537
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
538
    AVCOL_PRI_FILM       =8,
539
    AVCOL_PRI_NB           , ///< Not part of ABI
540
};
541

    
542
enum AVColorTransferCharacteristic{
543
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
544
    AVCOL_TRC_UNSPECIFIED=2,
545
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
546
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
547
    AVCOL_TRC_NB           , ///< Not part of ABI
548
};
549

    
550
enum AVColorSpace{
551
    AVCOL_SPC_RGB        =0,
552
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
553
    AVCOL_SPC_UNSPECIFIED=2,
554
    AVCOL_SPC_FCC        =4,
555
    AVCOL_SPC_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
556
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
557
    AVCOL_SPC_SMPTE240M  =7,
558
    AVCOL_SPC_NB           , ///< Not part of ABI
559
};
560

    
561
enum AVColorRange{
562
    AVCOL_RANGE_UNSPECIFIED=0,
563
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
564
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
565
    AVCOL_RANGE_NB           , ///< Not part of ABI
566
};
567

    
568
/**
569
 *  X   X      3 4 X      X are luma samples,
570
 *             1 2        1-6 are possible chroma positions
571
 *  X   X      5 6 X      0 is undefined/unknown position
572
 */
573
enum AVChromaLocation{
574
    AVCHROMA_LOC_UNSPECIFIED=0,
575
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
576
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
577
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
578
    AVCHROMA_LOC_TOP        =4,
579
    AVCHROMA_LOC_BOTTOMLEFT =5,
580
    AVCHROMA_LOC_BOTTOM     =6,
581
    AVCHROMA_LOC_NB           , ///< Not part of ABI
582
};
583

    
584
/**
585
 * LPC analysis type
586
 */
587
enum AVLPCType {
588
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
589
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
590
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
591
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
592
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
593
    AV_LPC_TYPE_NB              , ///< Not part of ABI
594
};
595

    
596
typedef struct RcOverride{
597
    int start_frame;
598
    int end_frame;
599
    int qscale; // If this is 0 then quality_factor will be used instead.
600
    float quality_factor;
601
} RcOverride;
602

    
603
#define FF_MAX_B_FRAMES 16
604

    
605
/* encoding support
606
   These flags can be passed in AVCodecContext.flags before initialization.
607
   Note: Not everything is supported yet.
608
*/
609

    
610
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
611
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
612
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
613
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
614
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
615
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
616
/**
617
 * The parent program guarantees that the input for B-frames containing
618
 * streams is not written to for at least s->max_b_frames+1 frames, if
619
 * this is not set the input will be copied.
620
 */
621
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
622
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
623
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
624
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
625
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
626
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
627
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
628
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
629
                                                  location instead of only at frame boundaries. */
630
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
631
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
632
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
633
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
634
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
635
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
636
/* Fx : Flag for h263+ extra options */
637
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
638
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
639
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
640
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
641
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
642
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
643
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
644
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
645
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
646
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
647
#define CODEC_FLAG_CLOSED_GOP     0x80000000
648
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
649
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
650
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
651
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
652
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
653
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
654
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
655
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
656
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
657
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
658
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
659
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
660
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
661
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
662
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
663
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
664
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
665
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
666
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
667
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
668
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
669
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
670

    
671
/* Unsupported options :
672
 *              Syntax Arithmetic coding (SAC)
673
 *              Reference Picture Selection
674
 *              Independent Segment Decoding */
675
/* /Fx */
676
/* codec capabilities */
677

    
678
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
679
/**
680
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
681
 * If not set, it might not use get_buffer() at all or use operations that
682
 * assume the buffer was allocated by avcodec_default_get_buffer.
683
 */
684
#define CODEC_CAP_DR1             0x0002
685
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
686
#define CODEC_CAP_PARSE_ONLY      0x0004
687
#define CODEC_CAP_TRUNCATED       0x0008
688
/* Codec can export data for HW decoding (XvMC). */
689
#define CODEC_CAP_HWACCEL         0x0010
690
/**
691
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
692
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
693
 */
694
#define CODEC_CAP_DELAY           0x0020
695
/**
696
 * Codec can be fed a final frame with a smaller size.
697
 * This can be used to prevent truncation of the last audio samples.
698
 */
699
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
700
/**
701
 * Codec can export data for HW decoding (VDPAU).
702
 */
703
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
704
/**
705
 * Codec can output multiple frames per AVPacket
706
 * Normally demuxers return one frame at a time, demuxers which do not do
707
 * are connected to a parser to split what they return into proper frames.
708
 * This flag is reserved to the very rare category of codecs which have a
709
 * bitstream that cannot be split into frames without timeconsuming
710
 * operations like full decoding. Demuxers carring such bitstreams thus
711
 * may return multiple frames in a packet. This has many disadvantages like
712
 * prohibiting stream copy in many cases thus it should only be considered
713
 * as a last resort.
714
 */
715
#define CODEC_CAP_SUBFRAMES        0x0100
716
/**
717
 * Codec is experimental and is thus avoided in favor of non experimental
718
 * encoders
719
 */
720
#define CODEC_CAP_EXPERIMENTAL     0x0200
721
/**
722
 * Codec should fill in channel configuration and samplerate instead of container
723
 */
724
#define CODEC_CAP_CHANNEL_CONF     0x0400
725
/**
726
 * Codec is able to deal with negative linesizes
727
 */
728
#define CODEC_CAP_NEG_LINESIZES    0x0800
729

    
730
//The following defines may change, don't expect compatibility if you use them.
731
#define MB_TYPE_INTRA4x4   0x0001
732
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
733
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
734
#define MB_TYPE_16x16      0x0008
735
#define MB_TYPE_16x8       0x0010
736
#define MB_TYPE_8x16       0x0020
737
#define MB_TYPE_8x8        0x0040
738
#define MB_TYPE_INTERLACED 0x0080
739
#define MB_TYPE_DIRECT2    0x0100 //FIXME
740
#define MB_TYPE_ACPRED     0x0200
741
#define MB_TYPE_GMC        0x0400
742
#define MB_TYPE_SKIP       0x0800
743
#define MB_TYPE_P0L0       0x1000
744
#define MB_TYPE_P1L0       0x2000
745
#define MB_TYPE_P0L1       0x4000
746
#define MB_TYPE_P1L1       0x8000
747
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
748
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
749
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
750
#define MB_TYPE_QUANT      0x00010000
751
#define MB_TYPE_CBP        0x00020000
752
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
753

    
754
/**
755
 * Pan Scan area.
756
 * This specifies the area which should be displayed.
757
 * Note there may be multiple such areas for one frame.
758
 */
759
typedef struct AVPanScan{
760
    /**
761
     * id
762
     * - encoding: Set by user.
763
     * - decoding: Set by libavcodec.
764
     */
765
    int id;
766

    
767
    /**
768
     * width and height in 1/16 pel
769
     * - encoding: Set by user.
770
     * - decoding: Set by libavcodec.
771
     */
772
    int width;
773
    int height;
774

    
775
    /**
776
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
777
     * - encoding: Set by user.
778
     * - decoding: Set by libavcodec.
779
     */
780
    int16_t position[3][2];
781
}AVPanScan;
782

    
783
#define FF_COMMON_FRAME \
784
    /**\
785
     * pointer to the picture planes.\
786
     * This might be different from the first allocated byte\
787
     * - encoding: \
788
     * - decoding: \
789
     */\
790
    uint8_t *data[4];\
791
    int linesize[4];\
792
    /**\
793
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
794
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
795
     * - encoding: \
796
     * - decoding: \
797
     */\
798
    uint8_t *base[4];\
799
    /**\
800
     * 1 -> keyframe, 0-> not\
801
     * - encoding: Set by libavcodec.\
802
     * - decoding: Set by libavcodec.\
803
     */\
804
    int key_frame;\
805
\
806
    /**\
807
     * Picture type of the frame, see ?_TYPE below.\
808
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
809
     * - decoding: Set by libavcodec.\
810
     */\
811
    int pict_type;\
812
\
813
    /**\
814
     * presentation timestamp in time_base units (time when frame should be shown to user)\
815
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
816
     * - encoding: MUST be set by user.\
817
     * - decoding: Set by libavcodec.\
818
     */\
819
    int64_t pts;\
820
\
821
    /**\
822
     * picture number in bitstream order\
823
     * - encoding: set by\
824
     * - decoding: Set by libavcodec.\
825
     */\
826
    int coded_picture_number;\
827
    /**\
828
     * picture number in display order\
829
     * - encoding: set by\
830
     * - decoding: Set by libavcodec.\
831
     */\
832
    int display_picture_number;\
833
\
834
    /**\
835
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
836
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
837
     * - decoding: Set by libavcodec.\
838
     */\
839
    int quality; \
840
\
841
    /**\
842
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
843
     * Set to INT_MAX if the buffer has not been used yet.\
844
     * - encoding: unused\
845
     * - decoding: MUST be set by get_buffer().\
846
     */\
847
    int age;\
848
\
849
    /**\
850
     * is this picture used as reference\
851
     * The values for this are the same as the MpegEncContext.picture_structure\
852
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
853
     * Set to 4 for delayed, non-reference frames.\
854
     * - encoding: unused\
855
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
856
     */\
857
    int reference;\
858
\
859
    /**\
860
     * QP table\
861
     * - encoding: unused\
862
     * - decoding: Set by libavcodec.\
863
     */\
864
    int8_t *qscale_table;\
865
    /**\
866
     * QP store stride\
867
     * - encoding: unused\
868
     * - decoding: Set by libavcodec.\
869
     */\
870
    int qstride;\
871
\
872
    /**\
873
     * mbskip_table[mb]>=1 if MB didn't change\
874
     * stride= mb_width = (width+15)>>4\
875
     * - encoding: unused\
876
     * - decoding: Set by libavcodec.\
877
     */\
878
    uint8_t *mbskip_table;\
879
\
880
    /**\
881
     * motion vector table\
882
     * @code\
883
     * example:\
884
     * int mv_sample_log2= 4 - motion_subsample_log2;\
885
     * int mb_width= (width+15)>>4;\
886
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
887
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
888
     * @endcode\
889
     * - encoding: Set by user.\
890
     * - decoding: Set by libavcodec.\
891
     */\
892
    int16_t (*motion_val[2])[2];\
893
\
894
    /**\
895
     * macroblock type table\
896
     * mb_type_base + mb_width + 2\
897
     * - encoding: Set by user.\
898
     * - decoding: Set by libavcodec.\
899
     */\
900
    uint32_t *mb_type;\
901
\
902
    /**\
903
     * log2 of the size of the block which a single vector in motion_val represents: \
904
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
905
     * - encoding: unused\
906
     * - decoding: Set by libavcodec.\
907
     */\
908
    uint8_t motion_subsample_log2;\
909
\
910
    /**\
911
     * for some private data of the user\
912
     * - encoding: unused\
913
     * - decoding: Set by user.\
914
     */\
915
    void *opaque;\
916
\
917
    /**\
918
     * error\
919
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
920
     * - decoding: unused\
921
     */\
922
    uint64_t error[4];\
923
\
924
    /**\
925
     * type of the buffer (to keep track of who has to deallocate data[*])\
926
     * - encoding: Set by the one who allocates it.\
927
     * - decoding: Set by the one who allocates it.\
928
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
929
     */\
930
    int type;\
931
    \
932
    /**\
933
     * When decoding, this signals how much the picture must be delayed.\
934
     * extra_delay = repeat_pict / (2*fps)\
935
     * - encoding: unused\
936
     * - decoding: Set by libavcodec.\
937
     */\
938
    int repeat_pict;\
939
    \
940
    /**\
941
     * \
942
     */\
943
    int qscale_type;\
944
    \
945
    /**\
946
     * The content of the picture is interlaced.\
947
     * - encoding: Set by user.\
948
     * - decoding: Set by libavcodec. (default 0)\
949
     */\
950
    int interlaced_frame;\
951
    \
952
    /**\
953
     * If the content is interlaced, is top field displayed first.\
954
     * - encoding: Set by user.\
955
     * - decoding: Set by libavcodec.\
956
     */\
957
    int top_field_first;\
958
    \
959
    /**\
960
     * Pan scan.\
961
     * - encoding: Set by user.\
962
     * - decoding: Set by libavcodec.\
963
     */\
964
    AVPanScan *pan_scan;\
965
    \
966
    /**\
967
     * Tell user application that palette has changed from previous frame.\
968
     * - encoding: ??? (no palette-enabled encoder yet)\
969
     * - decoding: Set by libavcodec. (default 0).\
970
     */\
971
    int palette_has_changed;\
972
    \
973
    /**\
974
     * codec suggestion on buffer type if != 0\
975
     * - encoding: unused\
976
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
977
     */\
978
    int buffer_hints;\
979
\
980
    /**\
981
     * DCT coefficients\
982
     * - encoding: unused\
983
     * - decoding: Set by libavcodec.\
984
     */\
985
    short *dct_coeff;\
986
\
987
    /**\
988
     * motion reference frame index\
989
     * the order in which these are stored can depend on the codec.\
990
     * - encoding: Set by user.\
991
     * - decoding: Set by libavcodec.\
992
     */\
993
    int8_t *ref_index[2];\
994
\
995
    /**\
996
     * reordered opaque 64bit (generally an integer or a double precision float\
997
     * PTS but can be anything). \
998
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
999
     * that time,\
1000
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
1001
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
1002
     * @deprecated in favor of pkt_pts\
1003
     * - encoding: unused\
1004
     * - decoding: Read by user.\
1005
     */\
1006
    int64_t reordered_opaque;\
1007
\
1008
    /**\
1009
     * hardware accelerator private data (FFmpeg allocated)\
1010
     * - encoding: unused\
1011
     * - decoding: Set by libavcodec\
1012
     */\
1013
    void *hwaccel_picture_private;\
1014
\
1015
    /**\
1016
     * reordered pts from the last AVPacket that has been input into the decoder\
1017
     * - encoding: unused\
1018
     * - decoding: Read by user.\
1019
     */\
1020
    int64_t pkt_pts;\
1021
\
1022
    /**\
1023
     * dts from the last AVPacket that has been input into the decoder\
1024
     * - encoding: unused\
1025
     * - decoding: Read by user.\
1026
     */\
1027
    int64_t pkt_dts;\
1028

    
1029

    
1030
#define FF_QSCALE_TYPE_MPEG1 0
1031
#define FF_QSCALE_TYPE_MPEG2 1
1032
#define FF_QSCALE_TYPE_H264  2
1033
#define FF_QSCALE_TYPE_VP56  3
1034

    
1035
#define FF_BUFFER_TYPE_INTERNAL 1
1036
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1037
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1038
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1039

    
1040

    
1041
#define FF_I_TYPE  1 ///< Intra
1042
#define FF_P_TYPE  2 ///< Predicted
1043
#define FF_B_TYPE  3 ///< Bi-dir predicted
1044
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1045
#define FF_SI_TYPE 5 ///< Switching Intra
1046
#define FF_SP_TYPE 6 ///< Switching Predicted
1047
#define FF_BI_TYPE 7
1048

    
1049
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1050
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1051
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1052
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1053

    
1054
typedef struct AVPacket {
1055
    /**
1056
     * Presentation timestamp in AVStream->time_base units; the time at which
1057
     * the decompressed packet will be presented to the user.
1058
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1059
     * pts MUST be larger or equal to dts as presentation cannot happen before
1060
     * decompression, unless one wants to view hex dumps. Some formats misuse
1061
     * the terms dts and pts/cts to mean something different. Such timestamps
1062
     * must be converted to true pts/dts before they are stored in AVPacket.
1063
     */
1064
    int64_t pts;
1065
    /**
1066
     * Decompression timestamp in AVStream->time_base units; the time at which
1067
     * the packet is decompressed.
1068
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1069
     */
1070
    int64_t dts;
1071
    uint8_t *data;
1072
    int   size;
1073
    int   stream_index;
1074
    int   flags;
1075
    /**
1076
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1077
     * Equals next_pts - this_pts in presentation order.
1078
     */
1079
    int   duration;
1080
    void  (*destruct)(struct AVPacket *);
1081
    void  *priv;
1082
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1083

    
1084
    /**
1085
     * Time difference in AVStream->time_base units from the pts of this
1086
     * packet to the point at which the output from the decoder has converged
1087
     * independent from the availability of previous frames. That is, the
1088
     * frames are virtually identical no matter if decoding started from
1089
     * the very first frame or from this keyframe.
1090
     * Is AV_NOPTS_VALUE if unknown.
1091
     * This field is not the display duration of the current packet.
1092
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1093
     * set.
1094
     *
1095
     * The purpose of this field is to allow seeking in streams that have no
1096
     * keyframes in the conventional sense. It corresponds to the
1097
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1098
     * essential for some types of subtitle streams to ensure that all
1099
     * subtitles are correctly displayed after seeking.
1100
     */
1101
    int64_t convergence_duration;
1102
} AVPacket;
1103
#define AV_PKT_FLAG_KEY   0x0001
1104
#if LIBAVCODEC_VERSION_MAJOR < 53
1105
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1106
#endif
1107

    
1108
/**
1109
 * Audio Video Frame.
1110
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1111
 * bumps.
1112
 * Removal, reordering and changes to existing fields require a major
1113
 * version bump. No fields should be added into AVFrame before or after
1114
 * FF_COMMON_FRAME!
1115
 * sizeof(AVFrame) must not be used outside libav*.
1116
 */
1117
typedef struct AVFrame {
1118
    FF_COMMON_FRAME
1119
} AVFrame;
1120

    
1121
/**
1122
 * main external API structure.
1123
 * New fields can be added to the end with minor version bumps.
1124
 * Removal, reordering and changes to existing fields require a major
1125
 * version bump.
1126
 * sizeof(AVCodecContext) must not be used outside libav*.
1127
 */
1128
typedef struct AVCodecContext {
1129
    /**
1130
     * information on struct for av_log
1131
     * - set by avcodec_alloc_context
1132
     */
1133
    const AVClass *av_class;
1134
    /**
1135
     * the average bitrate
1136
     * - encoding: Set by user; unused for constant quantizer encoding.
1137
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1138
     */
1139
    int bit_rate;
1140

    
1141
    /**
1142
     * number of bits the bitstream is allowed to diverge from the reference.
1143
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1144
     * - encoding: Set by user; unused for constant quantizer encoding.
1145
     * - decoding: unused
1146
     */
1147
    int bit_rate_tolerance;
1148

    
1149
    /**
1150
     * CODEC_FLAG_*.
1151
     * - encoding: Set by user.
1152
     * - decoding: Set by user.
1153
     */
1154
    int flags;
1155

    
1156
    /**
1157
     * Some codecs need additional format info. It is stored here.
1158
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1159
     * specific codec MUST set it correctly otherwise stream copy breaks.
1160
     * In general use of this field by muxers is not recommanded.
1161
     * - encoding: Set by libavcodec.
1162
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1163
     */
1164
    int sub_id;
1165

    
1166
    /**
1167
     * Motion estimation algorithm used for video coding.
1168
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1169
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1170
     * - encoding: MUST be set by user.
1171
     * - decoding: unused
1172
     */
1173
    int me_method;
1174

    
1175
    /**
1176
     * some codecs need / can use extradata like Huffman tables.
1177
     * mjpeg: Huffman tables
1178
     * rv10: additional flags
1179
     * mpeg4: global headers (they can be in the bitstream or here)
1180
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1181
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1182
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1183
     * - encoding: Set/allocated/freed by libavcodec.
1184
     * - decoding: Set/allocated/freed by user.
1185
     */
1186
    uint8_t *extradata;
1187
    int extradata_size;
1188

    
1189
    /**
1190
     * This is the fundamental unit of time (in seconds) in terms
1191
     * of which frame timestamps are represented. For fixed-fps content,
1192
     * timebase should be 1/framerate and timestamp increments should be
1193
     * identically 1.
1194
     * - encoding: MUST be set by user.
1195
     * - decoding: Set by libavcodec.
1196
     */
1197
    AVRational time_base;
1198

    
1199
    /* video only */
1200
    /**
1201
     * picture width / height.
1202
     * - encoding: MUST be set by user.
1203
     * - decoding: Set by libavcodec.
1204
     * Note: For compatibility it is possible to set this instead of
1205
     * coded_width/height before decoding.
1206
     */
1207
    int width, height;
1208

    
1209
#define FF_ASPECT_EXTENDED 15
1210

    
1211
    /**
1212
     * the number of pictures in a group of pictures, or 0 for intra_only
1213
     * - encoding: Set by user.
1214
     * - decoding: unused
1215
     */
1216
    int gop_size;
1217

    
1218
    /**
1219
     * Pixel format, see PIX_FMT_xxx.
1220
     * May be set by the demuxer if known from headers.
1221
     * May be overriden by the decoder if it knows better.
1222
     * - encoding: Set by user.
1223
     * - decoding: Set by user if known, overridden by libavcodec if known
1224
     */
1225
    enum PixelFormat pix_fmt;
1226

    
1227
    /**
1228
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1229
     * has to read frames at native frame rate.
1230
     * - encoding: Set by user.
1231
     * - decoding: unused
1232
     */
1233
    int rate_emu;
1234

    
1235
    /**
1236
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1237
     * decoder to draw a horizontal band. It improves cache usage. Not
1238
     * all codecs can do that. You must check the codec capabilities
1239
     * beforehand.
1240
     * The function is also used by hardware acceleration APIs.
1241
     * It is called at least once during frame decoding to pass
1242
     * the data needed for hardware render.
1243
     * In that mode instead of pixel data, AVFrame points to
1244
     * a structure specific to the acceleration API. The application
1245
     * reads the structure and can change some fields to indicate progress
1246
     * or mark state.
1247
     * - encoding: unused
1248
     * - decoding: Set by user.
1249
     * @param height the height of the slice
1250
     * @param y the y position of the slice
1251
     * @param type 1->top field, 2->bottom field, 3->frame
1252
     * @param offset offset into the AVFrame.data from which the slice should be read
1253
     */
1254
    void (*draw_horiz_band)(struct AVCodecContext *s,
1255
                            const AVFrame *src, int offset[4],
1256
                            int y, int type, int height);
1257

    
1258
    /* audio only */
1259
    int sample_rate; ///< samples per second
1260
    int channels;    ///< number of audio channels
1261

    
1262
    /**
1263
     * audio sample format
1264
     * - encoding: Set by user.
1265
     * - decoding: Set by libavcodec.
1266
     */
1267
    enum AVSampleFormat sample_fmt;  ///< sample format
1268

    
1269
    /* The following data should not be initialized. */
1270
    /**
1271
     * Samples per packet, initialized when calling 'init'.
1272
     */
1273
    int frame_size;
1274
    int frame_number;   ///< audio or video frame number
1275
#if LIBAVCODEC_VERSION_MAJOR < 53
1276
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1277
#endif
1278

    
1279
    /**
1280
     * Number of frames the decoded output will be delayed relative to
1281
     * the encoded input.
1282
     * - encoding: Set by libavcodec.
1283
     * - decoding: unused
1284
     */
1285
    int delay;
1286

    
1287
    /* - encoding parameters */
1288
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1289
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1290

    
1291
    /**
1292
     * minimum quantizer
1293
     * - encoding: Set by user.
1294
     * - decoding: unused
1295
     */
1296
    int qmin;
1297

    
1298
    /**
1299
     * maximum quantizer
1300
     * - encoding: Set by user.
1301
     * - decoding: unused
1302
     */
1303
    int qmax;
1304

    
1305
    /**
1306
     * maximum quantizer difference between frames
1307
     * - encoding: Set by user.
1308
     * - decoding: unused
1309
     */
1310
    int max_qdiff;
1311

    
1312
    /**
1313
     * maximum number of B-frames between non-B-frames
1314
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1315
     * - encoding: Set by user.
1316
     * - decoding: unused
1317
     */
1318
    int max_b_frames;
1319

    
1320
    /**
1321
     * qscale factor between IP and B-frames
1322
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1323
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1324
     * - encoding: Set by user.
1325
     * - decoding: unused
1326
     */
1327
    float b_quant_factor;
1328

    
1329
    /** obsolete FIXME remove */
1330
    int rc_strategy;
1331
#define FF_RC_STRATEGY_XVID 1
1332

    
1333
    int b_frame_strategy;
1334

    
1335
    /**
1336
     * hurry up amount
1337
     * - encoding: unused
1338
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1339
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1340
     */
1341
    int hurry_up;
1342

    
1343
    struct AVCodec *codec;
1344

    
1345
    void *priv_data;
1346

    
1347
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1348
                            /* do its best to deliver a chunk with size     */
1349
                            /* below rtp_payload_size, the chunk will start */
1350
                            /* with a start code on some codecs like H.263. */
1351
                            /* This doesn't take account of any particular  */
1352
                            /* headers inside the transmitted RTP payload.  */
1353

    
1354

    
1355
    /* The RTP callback: This function is called    */
1356
    /* every time the encoder has a packet to send. */
1357
    /* It depends on the encoder if the data starts */
1358
    /* with a Start Code (it should). H.263 does.   */
1359
    /* mb_nb contains the number of macroblocks     */
1360
    /* encoded in the RTP payload.                  */
1361
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1362

    
1363
    /* statistics, used for 2-pass encoding */
1364
    int mv_bits;
1365
    int header_bits;
1366
    int i_tex_bits;
1367
    int p_tex_bits;
1368
    int i_count;
1369
    int p_count;
1370
    int skip_count;
1371
    int misc_bits;
1372

    
1373
    /**
1374
     * number of bits used for the previously encoded frame
1375
     * - encoding: Set by libavcodec.
1376
     * - decoding: unused
1377
     */
1378
    int frame_bits;
1379

    
1380
    /**
1381
     * Private data of the user, can be used to carry app specific stuff.
1382
     * - encoding: Set by user.
1383
     * - decoding: Set by user.
1384
     */
1385
    void *opaque;
1386

    
1387
    char codec_name[32];
1388
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1389
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1390

    
1391
    /**
1392
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1393
     * This is used to work around some encoder bugs.
1394
     * A demuxer should set this to what is stored in the field used to identify the codec.
1395
     * If there are multiple such fields in a container then the demuxer should choose the one
1396
     * which maximizes the information about the used codec.
1397
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1398
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1399
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1400
     * first.
1401
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1402
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1403
     */
1404
    unsigned int codec_tag;
1405

    
1406
    /**
1407
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1408
     * - encoding: Set by user
1409
     * - decoding: Set by user
1410
     */
1411
    int workaround_bugs;
1412
#define FF_BUG_AUTODETECT       1  ///< autodetection
1413
#define FF_BUG_OLD_MSMPEG4      2
1414
#define FF_BUG_XVID_ILACE       4
1415
#define FF_BUG_UMP4             8
1416
#define FF_BUG_NO_PADDING       16
1417
#define FF_BUG_AMV              32
1418
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1419
#define FF_BUG_QPEL_CHROMA      64
1420
#define FF_BUG_STD_QPEL         128
1421
#define FF_BUG_QPEL_CHROMA2     256
1422
#define FF_BUG_DIRECT_BLOCKSIZE 512
1423
#define FF_BUG_EDGE             1024
1424
#define FF_BUG_HPEL_CHROMA      2048
1425
#define FF_BUG_DC_CLIP          4096
1426
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1427
#define FF_BUG_TRUNCATED       16384
1428
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1429

    
1430
    /**
1431
     * luma single coefficient elimination threshold
1432
     * - encoding: Set by user.
1433
     * - decoding: unused
1434
     */
1435
    int luma_elim_threshold;
1436

    
1437
    /**
1438
     * chroma single coeff elimination threshold
1439
     * - encoding: Set by user.
1440
     * - decoding: unused
1441
     */
1442
    int chroma_elim_threshold;
1443

    
1444
    /**
1445
     * strictly follow the standard (MPEG4, ...).
1446
     * - encoding: Set by user.
1447
     * - decoding: Set by user.
1448
     * Setting this to STRICT or higher means the encoder and decoder will
1449
     * generally do stupid things, whereas setting it to unofficial or lower
1450
     * will mean the encoder might produce output that is not supported by all
1451
     * spec-compliant decoders. Decoders don't differentiate between normal,
1452
     * unofficial and experimental (that is, they always try to decode things
1453
     * when they can) unless they are explicitly asked to behave stupidly
1454
     * (=strictly conform to the specs)
1455
     */
1456
    int strict_std_compliance;
1457
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1458
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1459
#define FF_COMPLIANCE_NORMAL        0
1460
#if FF_API_INOFFICIAL
1461
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1462
#endif
1463
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1464
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1465

    
1466
    /**
1467
     * qscale offset between IP and B-frames
1468
     * - encoding: Set by user.
1469
     * - decoding: unused
1470
     */
1471
    float b_quant_offset;
1472

    
1473
    /**
1474
     * Error recognization; higher values will detect more errors but may
1475
     * misdetect some more or less valid parts as errors.
1476
     * - encoding: unused
1477
     * - decoding: Set by user.
1478
     */
1479
    int error_recognition;
1480
#define FF_ER_CAREFUL         1
1481
#define FF_ER_COMPLIANT       2
1482
#define FF_ER_AGGRESSIVE      3
1483
#define FF_ER_VERY_AGGRESSIVE 4
1484

    
1485
    /**
1486
     * Called at the beginning of each frame to get a buffer for it.
1487
     * If pic.reference is set then the frame will be read later by libavcodec.
1488
     * avcodec_align_dimensions2() should be used to find the required width and
1489
     * height, as they normally need to be rounded up to the next multiple of 16.
1490
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1491
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1492
     * some other means.
1493
     * - encoding: unused
1494
     * - decoding: Set by libavcodec, user can override.
1495
     */
1496
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1497

    
1498
    /**
1499
     * Called to release buffers which were allocated with get_buffer.
1500
     * A released buffer can be reused in get_buffer().
1501
     * pic.data[*] must be set to NULL.
1502
     * - encoding: unused
1503
     * - decoding: Set by libavcodec, user can override.
1504
     */
1505
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1506

    
1507
    /**
1508
     * Size of the frame reordering buffer in the decoder.
1509
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1510
     * - encoding: Set by libavcodec.
1511
     * - decoding: Set by libavcodec.
1512
     */
1513
    int has_b_frames;
1514

    
1515
    /**
1516
     * number of bytes per packet if constant and known or 0
1517
     * Used by some WAV based audio codecs.
1518
     */
1519
    int block_align;
1520

    
1521
    int parse_only; /* - decoding only: If true, only parsing is done
1522
                       (function avcodec_parse_frame()). The frame
1523
                       data is returned. Only MPEG codecs support this now. */
1524

    
1525
    /**
1526
     * 0-> h263 quant 1-> mpeg quant
1527
     * - encoding: Set by user.
1528
     * - decoding: unused
1529
     */
1530
    int mpeg_quant;
1531

    
1532
    /**
1533
     * pass1 encoding statistics output buffer
1534
     * - encoding: Set by libavcodec.
1535
     * - decoding: unused
1536
     */
1537
    char *stats_out;
1538

    
1539
    /**
1540
     * pass2 encoding statistics input buffer
1541
     * Concatenated stuff from stats_out of pass1 should be placed here.
1542
     * - encoding: Allocated/set/freed by user.
1543
     * - decoding: unused
1544
     */
1545
    char *stats_in;
1546

    
1547
    /**
1548
     * ratecontrol qmin qmax limiting method
1549
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1550
     * - encoding: Set by user.
1551
     * - decoding: unused
1552
     */
1553
    float rc_qsquish;
1554

    
1555
    float rc_qmod_amp;
1556
    int rc_qmod_freq;
1557

    
1558
    /**
1559
     * ratecontrol override, see RcOverride
1560
     * - encoding: Allocated/set/freed by user.
1561
     * - decoding: unused
1562
     */
1563
    RcOverride *rc_override;
1564
    int rc_override_count;
1565

    
1566
    /**
1567
     * rate control equation
1568
     * - encoding: Set by user
1569
     * - decoding: unused
1570
     */
1571
    const char *rc_eq;
1572

    
1573
    /**
1574
     * maximum bitrate
1575
     * - encoding: Set by user.
1576
     * - decoding: unused
1577
     */
1578
    int rc_max_rate;
1579

    
1580
    /**
1581
     * minimum bitrate
1582
     * - encoding: Set by user.
1583
     * - decoding: unused
1584
     */
1585
    int rc_min_rate;
1586

    
1587
    /**
1588
     * decoder bitstream buffer size
1589
     * - encoding: Set by user.
1590
     * - decoding: unused
1591
     */
1592
    int rc_buffer_size;
1593
    float rc_buffer_aggressivity;
1594

    
1595
    /**
1596
     * qscale factor between P and I-frames
1597
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1598
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1599
     * - encoding: Set by user.
1600
     * - decoding: unused
1601
     */
1602
    float i_quant_factor;
1603

    
1604
    /**
1605
     * qscale offset between P and I-frames
1606
     * - encoding: Set by user.
1607
     * - decoding: unused
1608
     */
1609
    float i_quant_offset;
1610

    
1611
    /**
1612
     * initial complexity for pass1 ratecontrol
1613
     * - encoding: Set by user.
1614
     * - decoding: unused
1615
     */
1616
    float rc_initial_cplx;
1617

    
1618
    /**
1619
     * DCT algorithm, see FF_DCT_* below
1620
     * - encoding: Set by user.
1621
     * - decoding: unused
1622
     */
1623
    int dct_algo;
1624
#define FF_DCT_AUTO    0
1625
#define FF_DCT_FASTINT 1
1626
#define FF_DCT_INT     2
1627
#define FF_DCT_MMX     3
1628
#define FF_DCT_MLIB    4
1629
#define FF_DCT_ALTIVEC 5
1630
#define FF_DCT_FAAN    6
1631

    
1632
    /**
1633
     * luminance masking (0-> disabled)
1634
     * - encoding: Set by user.
1635
     * - decoding: unused
1636
     */
1637
    float lumi_masking;
1638

    
1639
    /**
1640
     * temporary complexity masking (0-> disabled)
1641
     * - encoding: Set by user.
1642
     * - decoding: unused
1643
     */
1644
    float temporal_cplx_masking;
1645

    
1646
    /**
1647
     * spatial complexity masking (0-> disabled)
1648
     * - encoding: Set by user.
1649
     * - decoding: unused
1650
     */
1651
    float spatial_cplx_masking;
1652

    
1653
    /**
1654
     * p block masking (0-> disabled)
1655
     * - encoding: Set by user.
1656
     * - decoding: unused
1657
     */
1658
    float p_masking;
1659

    
1660
    /**
1661
     * darkness masking (0-> disabled)
1662
     * - encoding: Set by user.
1663
     * - decoding: unused
1664
     */
1665
    float dark_masking;
1666

    
1667
    /**
1668
     * IDCT algorithm, see FF_IDCT_* below.
1669
     * - encoding: Set by user.
1670
     * - decoding: Set by user.
1671
     */
1672
    int idct_algo;
1673
#define FF_IDCT_AUTO          0
1674
#define FF_IDCT_INT           1
1675
#define FF_IDCT_SIMPLE        2
1676
#define FF_IDCT_SIMPLEMMX     3
1677
#define FF_IDCT_LIBMPEG2MMX   4
1678
#define FF_IDCT_PS2           5
1679
#define FF_IDCT_MLIB          6
1680
#define FF_IDCT_ARM           7
1681
#define FF_IDCT_ALTIVEC       8
1682
#define FF_IDCT_SH4           9
1683
#define FF_IDCT_SIMPLEARM     10
1684
#define FF_IDCT_H264          11
1685
#define FF_IDCT_VP3           12
1686
#define FF_IDCT_IPP           13
1687
#define FF_IDCT_XVIDMMX       14
1688
#define FF_IDCT_CAVS          15
1689
#define FF_IDCT_SIMPLEARMV5TE 16
1690
#define FF_IDCT_SIMPLEARMV6   17
1691
#define FF_IDCT_SIMPLEVIS     18
1692
#define FF_IDCT_WMV2          19
1693
#define FF_IDCT_FAAN          20
1694
#define FF_IDCT_EA            21
1695
#define FF_IDCT_SIMPLENEON    22
1696
#define FF_IDCT_SIMPLEALPHA   23
1697
#define FF_IDCT_BINK          24
1698

    
1699
    /**
1700
     * slice count
1701
     * - encoding: Set by libavcodec.
1702
     * - decoding: Set by user (or 0).
1703
     */
1704
    int slice_count;
1705
    /**
1706
     * slice offsets in the frame in bytes
1707
     * - encoding: Set/allocated by libavcodec.
1708
     * - decoding: Set/allocated by user (or NULL).
1709
     */
1710
    int *slice_offset;
1711

    
1712
    /**
1713
     * error concealment flags
1714
     * - encoding: unused
1715
     * - decoding: Set by user.
1716
     */
1717
    int error_concealment;
1718
#define FF_EC_GUESS_MVS   1
1719
#define FF_EC_DEBLOCK     2
1720

    
1721
    /**
1722
     * dsp_mask could be add used to disable unwanted CPU features
1723
     * CPU features (i.e. MMX, SSE. ...)
1724
     *
1725
     * With the FORCE flag you may instead enable given CPU features.
1726
     * (Dangerous: Usable in case of misdetection, improper usage however will
1727
     * result into program crash.)
1728
     */
1729
    unsigned dsp_mask;
1730

    
1731
#if FF_API_MM_FLAGS
1732
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1733
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1734
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1735
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1736
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1737
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1738
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1739
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1740
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1741
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1742
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1743
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1744
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1745
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1746
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1747
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1748
#endif
1749

    
1750
    /**
1751
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1752
     * - encoding: Set by libavcodec.
1753
     * - decoding: Set by user.
1754
     */
1755
     int bits_per_coded_sample;
1756

    
1757
    /**
1758
     * prediction method (needed for huffyuv)
1759
     * - encoding: Set by user.
1760
     * - decoding: unused
1761
     */
1762
     int prediction_method;
1763
#define FF_PRED_LEFT   0
1764
#define FF_PRED_PLANE  1
1765
#define FF_PRED_MEDIAN 2
1766

    
1767
    /**
1768
     * sample aspect ratio (0 if unknown)
1769
     * That is the width of a pixel divided by the height of the pixel.
1770
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1771
     * - encoding: Set by user.
1772
     * - decoding: Set by libavcodec.
1773
     */
1774
    AVRational sample_aspect_ratio;
1775

    
1776
    /**
1777
     * the picture in the bitstream
1778
     * - encoding: Set by libavcodec.
1779
     * - decoding: Set by libavcodec.
1780
     */
1781
    AVFrame *coded_frame;
1782

    
1783
    /**
1784
     * debug
1785
     * - encoding: Set by user.
1786
     * - decoding: Set by user.
1787
     */
1788
    int debug;
1789
#define FF_DEBUG_PICT_INFO   1
1790
#define FF_DEBUG_RC          2
1791
#define FF_DEBUG_BITSTREAM   4
1792
#define FF_DEBUG_MB_TYPE     8
1793
#define FF_DEBUG_QP          16
1794
#define FF_DEBUG_MV          32
1795
#define FF_DEBUG_DCT_COEFF   0x00000040
1796
#define FF_DEBUG_SKIP        0x00000080
1797
#define FF_DEBUG_STARTCODE   0x00000100
1798
#define FF_DEBUG_PTS         0x00000200
1799
#define FF_DEBUG_ER          0x00000400
1800
#define FF_DEBUG_MMCO        0x00000800
1801
#define FF_DEBUG_BUGS        0x00001000
1802
#define FF_DEBUG_VIS_QP      0x00002000
1803
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1804
#define FF_DEBUG_BUFFERS     0x00008000
1805

    
1806
    /**
1807
     * debug
1808
     * - encoding: Set by user.
1809
     * - decoding: Set by user.
1810
     */
1811
    int debug_mv;
1812
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1813
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1814
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1815

    
1816
    /**
1817
     * error
1818
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1819
     * - decoding: unused
1820
     */
1821
    uint64_t error[4];
1822

    
1823
    /**
1824
     * minimum MB quantizer
1825
     * - encoding: unused
1826
     * - decoding: unused
1827
     */
1828
    int mb_qmin;
1829

    
1830
    /**
1831
     * maximum MB quantizer
1832
     * - encoding: unused
1833
     * - decoding: unused
1834
     */
1835
    int mb_qmax;
1836

    
1837
    /**
1838
     * motion estimation comparison function
1839
     * - encoding: Set by user.
1840
     * - decoding: unused
1841
     */
1842
    int me_cmp;
1843
    /**
1844
     * subpixel motion estimation comparison function
1845
     * - encoding: Set by user.
1846
     * - decoding: unused
1847
     */
1848
    int me_sub_cmp;
1849
    /**
1850
     * macroblock comparison function (not supported yet)
1851
     * - encoding: Set by user.
1852
     * - decoding: unused
1853
     */
1854
    int mb_cmp;
1855
    /**
1856
     * interlaced DCT comparison function
1857
     * - encoding: Set by user.
1858
     * - decoding: unused
1859
     */
1860
    int ildct_cmp;
1861
#define FF_CMP_SAD    0
1862
#define FF_CMP_SSE    1
1863
#define FF_CMP_SATD   2
1864
#define FF_CMP_DCT    3
1865
#define FF_CMP_PSNR   4
1866
#define FF_CMP_BIT    5
1867
#define FF_CMP_RD     6
1868
#define FF_CMP_ZERO   7
1869
#define FF_CMP_VSAD   8
1870
#define FF_CMP_VSSE   9
1871
#define FF_CMP_NSSE   10
1872
#define FF_CMP_W53    11
1873
#define FF_CMP_W97    12
1874
#define FF_CMP_DCTMAX 13
1875
#define FF_CMP_DCT264 14
1876
#define FF_CMP_CHROMA 256
1877

    
1878
    /**
1879
     * ME diamond size & shape
1880
     * - encoding: Set by user.
1881
     * - decoding: unused
1882
     */
1883
    int dia_size;
1884

    
1885
    /**
1886
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1887
     * - encoding: Set by user.
1888
     * - decoding: unused
1889
     */
1890
    int last_predictor_count;
1891

    
1892
    /**
1893
     * prepass for motion estimation
1894
     * - encoding: Set by user.
1895
     * - decoding: unused
1896
     */
1897
    int pre_me;
1898

    
1899
    /**
1900
     * motion estimation prepass comparison function
1901
     * - encoding: Set by user.
1902
     * - decoding: unused
1903
     */
1904
    int me_pre_cmp;
1905

    
1906
    /**
1907
     * ME prepass diamond size & shape
1908
     * - encoding: Set by user.
1909
     * - decoding: unused
1910
     */
1911
    int pre_dia_size;
1912

    
1913
    /**
1914
     * subpel ME quality
1915
     * - encoding: Set by user.
1916
     * - decoding: unused
1917
     */
1918
    int me_subpel_quality;
1919

    
1920
    /**
1921
     * callback to negotiate the pixelFormat
1922
     * @param fmt is the list of formats which are supported by the codec,
1923
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1924
     * The first is always the native one.
1925
     * @return the chosen format
1926
     * - encoding: unused
1927
     * - decoding: Set by user, if not set the native format will be chosen.
1928
     */
1929
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1930

    
1931
    /**
1932
     * DTG active format information (additional aspect ratio
1933
     * information only used in DVB MPEG-2 transport streams)
1934
     * 0 if not set.
1935
     *
1936
     * - encoding: unused
1937
     * - decoding: Set by decoder.
1938
     */
1939
    int dtg_active_format;
1940
#define FF_DTG_AFD_SAME         8
1941
#define FF_DTG_AFD_4_3          9
1942
#define FF_DTG_AFD_16_9         10
1943
#define FF_DTG_AFD_14_9         11
1944
#define FF_DTG_AFD_4_3_SP_14_9  13
1945
#define FF_DTG_AFD_16_9_SP_14_9 14
1946
#define FF_DTG_AFD_SP_4_3       15
1947

    
1948
    /**
1949
     * maximum motion estimation search range in subpel units
1950
     * If 0 then no limit.
1951
     *
1952
     * - encoding: Set by user.
1953
     * - decoding: unused
1954
     */
1955
    int me_range;
1956

    
1957
    /**
1958
     * intra quantizer bias
1959
     * - encoding: Set by user.
1960
     * - decoding: unused
1961
     */
1962
    int intra_quant_bias;
1963
#define FF_DEFAULT_QUANT_BIAS 999999
1964

    
1965
    /**
1966
     * inter quantizer bias
1967
     * - encoding: Set by user.
1968
     * - decoding: unused
1969
     */
1970
    int inter_quant_bias;
1971

    
1972
    /**
1973
     * color table ID
1974
     * - encoding: unused
1975
     * - decoding: Which clrtable should be used for 8bit RGB images.
1976
     *             Tables have to be stored somewhere. FIXME
1977
     */
1978
    int color_table_id;
1979

    
1980
    /**
1981
     * internal_buffer count
1982
     * Don't touch, used by libavcodec default_get_buffer().
1983
     */
1984
    int internal_buffer_count;
1985

    
1986
    /**
1987
     * internal_buffers
1988
     * Don't touch, used by libavcodec default_get_buffer().
1989
     */
1990
    void *internal_buffer;
1991

    
1992
    /**
1993
     * Global quality for codecs which cannot change it per frame.
1994
     * This should be proportional to MPEG-1/2/4 qscale.
1995
     * - encoding: Set by user.
1996
     * - decoding: unused
1997
     */
1998
    int global_quality;
1999

    
2000
#define FF_CODER_TYPE_VLC       0
2001
#define FF_CODER_TYPE_AC        1
2002
#define FF_CODER_TYPE_RAW       2
2003
#define FF_CODER_TYPE_RLE       3
2004
#define FF_CODER_TYPE_DEFLATE   4
2005
    /**
2006
     * coder type
2007
     * - encoding: Set by user.
2008
     * - decoding: unused
2009
     */
2010
    int coder_type;
2011

    
2012
    /**
2013
     * context model
2014
     * - encoding: Set by user.
2015
     * - decoding: unused
2016
     */
2017
    int context_model;
2018
#if 0
2019
    /**
2020
     *
2021
     * - encoding: unused
2022
     * - decoding: Set by user.
2023
     */
2024
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2025
#endif
2026

    
2027
    /**
2028
     * slice flags
2029
     * - encoding: unused
2030
     * - decoding: Set by user.
2031
     */
2032
    int slice_flags;
2033
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2034
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2035
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2036

    
2037
    /**
2038
     * XVideo Motion Acceleration
2039
     * - encoding: forbidden
2040
     * - decoding: set by decoder
2041
     */
2042
    int xvmc_acceleration;
2043

    
2044
    /**
2045
     * macroblock decision mode
2046
     * - encoding: Set by user.
2047
     * - decoding: unused
2048
     */
2049
    int mb_decision;
2050
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2051
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2052
#define FF_MB_DECISION_RD     2        ///< rate distortion
2053

    
2054
    /**
2055
     * custom intra quantization matrix
2056
     * - encoding: Set by user, can be NULL.
2057
     * - decoding: Set by libavcodec.
2058
     */
2059
    uint16_t *intra_matrix;
2060

    
2061
    /**
2062
     * custom inter quantization matrix
2063
     * - encoding: Set by user, can be NULL.
2064
     * - decoding: Set by libavcodec.
2065
     */
2066
    uint16_t *inter_matrix;
2067

    
2068
    /**
2069
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2070
     * This is used to work around some encoder bugs.
2071
     * - encoding: unused
2072
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2073
     */
2074
    unsigned int stream_codec_tag;
2075

    
2076
    /**
2077
     * scene change detection threshold
2078
     * 0 is default, larger means fewer detected scene changes.
2079
     * - encoding: Set by user.
2080
     * - decoding: unused
2081
     */
2082
    int scenechange_threshold;
2083

    
2084
    /**
2085
     * minimum Lagrange multipler
2086
     * - encoding: Set by user.
2087
     * - decoding: unused
2088
     */
2089
    int lmin;
2090

    
2091
    /**
2092
     * maximum Lagrange multipler
2093
     * - encoding: Set by user.
2094
     * - decoding: unused
2095
     */
2096
    int lmax;
2097

    
2098
#if FF_API_PALETTE_CONTROL
2099
    /**
2100
     * palette control structure
2101
     * - encoding: ??? (no palette-enabled encoder yet)
2102
     * - decoding: Set by user.
2103
     */
2104
    struct AVPaletteControl *palctrl;
2105
#endif
2106

    
2107
    /**
2108
     * noise reduction strength
2109
     * - encoding: Set by user.
2110
     * - decoding: unused
2111
     */
2112
    int noise_reduction;
2113

    
2114
    /**
2115
     * Called at the beginning of a frame to get cr buffer for it.
2116
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2117
     * libavcodec will pass previous buffer in pic, function should return
2118
     * same buffer or new buffer with old frame "painted" into it.
2119
     * If pic.data[0] == NULL must behave like get_buffer().
2120
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2121
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2122
     * some other means.
2123
     * - encoding: unused
2124
     * - decoding: Set by libavcodec, user can override.
2125
     */
2126
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2127

    
2128
    /**
2129
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2130
     * - encoding: Set by user.
2131
     * - decoding: unused
2132
     */
2133
    int rc_initial_buffer_occupancy;
2134

    
2135
    /**
2136
     *
2137
     * - encoding: Set by user.
2138
     * - decoding: unused
2139
     */
2140
    int inter_threshold;
2141

    
2142
    /**
2143
     * CODEC_FLAG2_*
2144
     * - encoding: Set by user.
2145
     * - decoding: Set by user.
2146
     */
2147
    int flags2;
2148

    
2149
    /**
2150
     * Simulates errors in the bitstream to test error concealment.
2151
     * - encoding: Set by user.
2152
     * - decoding: unused
2153
     */
2154
    int error_rate;
2155

    
2156
    /**
2157
     * MP3 antialias algorithm, see FF_AA_* below.
2158
     * - encoding: unused
2159
     * - decoding: Set by user.
2160
     */
2161
    int antialias_algo;
2162
#define FF_AA_AUTO    0
2163
#define FF_AA_FASTINT 1 //not implemented yet
2164
#define FF_AA_INT     2
2165
#define FF_AA_FLOAT   3
2166
    /**
2167
     * quantizer noise shaping
2168
     * - encoding: Set by user.
2169
     * - decoding: unused
2170
     */
2171
    int quantizer_noise_shaping;
2172

    
2173
    /**
2174
     * thread count
2175
     * is used to decide how many independent tasks should be passed to execute()
2176
     * - encoding: Set by user.
2177
     * - decoding: Set by user.
2178
     */
2179
    int thread_count;
2180

    
2181
    /**
2182
     * The codec may call this to execute several independent things.
2183
     * It will return only after finishing all tasks.
2184
     * The user may replace this with some multithreaded implementation,
2185
     * the default implementation will execute the parts serially.
2186
     * @param count the number of things to execute
2187
     * - encoding: Set by libavcodec, user can override.
2188
     * - decoding: Set by libavcodec, user can override.
2189
     */
2190
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2191

    
2192
    /**
2193
     * thread opaque
2194
     * Can be used by execute() to store some per AVCodecContext stuff.
2195
     * - encoding: set by execute()
2196
     * - decoding: set by execute()
2197
     */
2198
    void *thread_opaque;
2199

    
2200
    /**
2201
     * Motion estimation threshold below which no motion estimation is
2202
     * performed, but instead the user specified motion vectors are used.
2203
     *
2204
     * - encoding: Set by user.
2205
     * - decoding: unused
2206
     */
2207
     int me_threshold;
2208

    
2209
    /**
2210
     * Macroblock threshold below which the user specified macroblock types will be used.
2211
     * - encoding: Set by user.
2212
     * - decoding: unused
2213
     */
2214
     int mb_threshold;
2215

    
2216
    /**
2217
     * precision of the intra DC coefficient - 8
2218
     * - encoding: Set by user.
2219
     * - decoding: unused
2220
     */
2221
     int intra_dc_precision;
2222

    
2223
    /**
2224
     * noise vs. sse weight for the nsse comparsion function
2225
     * - encoding: Set by user.
2226
     * - decoding: unused
2227
     */
2228
     int nsse_weight;
2229

    
2230
    /**
2231
     * Number of macroblock rows at the top which are skipped.
2232
     * - encoding: unused
2233
     * - decoding: Set by user.
2234
     */
2235
     int skip_top;
2236

    
2237
    /**
2238
     * Number of macroblock rows at the bottom which are skipped.
2239
     * - encoding: unused
2240
     * - decoding: Set by user.
2241
     */
2242
     int skip_bottom;
2243

    
2244
    /**
2245
     * profile
2246
     * - encoding: Set by user.
2247
     * - decoding: Set by libavcodec.
2248
     */
2249
     int profile;
2250
#define FF_PROFILE_UNKNOWN -99
2251

    
2252
#define FF_PROFILE_AAC_MAIN 0
2253
#define FF_PROFILE_AAC_LOW  1
2254
#define FF_PROFILE_AAC_SSR  2
2255
#define FF_PROFILE_AAC_LTP  3
2256

    
2257
#define FF_PROFILE_DTS         20
2258
#define FF_PROFILE_DTS_ES      30
2259
#define FF_PROFILE_DTS_96_24   40
2260
#define FF_PROFILE_DTS_HD_HRA  50
2261
#define FF_PROFILE_DTS_HD_MA   60
2262

    
2263
#define FF_PROFILE_H264_BASELINE    66
2264
#define FF_PROFILE_H264_MAIN        77
2265
#define FF_PROFILE_H264_EXTENDED    88
2266
#define FF_PROFILE_H264_HIGH        100
2267
#define FF_PROFILE_H264_HIGH_10     110
2268
#define FF_PROFILE_H264_HIGH_422    122
2269
#define FF_PROFILE_H264_HIGH_444    244
2270
#define FF_PROFILE_H264_CAVLC_444   44
2271

    
2272
    /**
2273
     * level
2274
     * - encoding: Set by user.
2275
     * - decoding: Set by libavcodec.
2276
     */
2277
     int level;
2278
#define FF_LEVEL_UNKNOWN -99
2279

    
2280
    /**
2281
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2282
     * - encoding: unused
2283
     * - decoding: Set by user.
2284
     */
2285
     int lowres;
2286

    
2287
    /**
2288
     * Bitstream width / height, may be different from width/height if lowres
2289
     * or other things are used.
2290
     * - encoding: unused
2291
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2292
     */
2293
    int coded_width, coded_height;
2294

    
2295
    /**
2296
     * frame skip threshold
2297
     * - encoding: Set by user.
2298
     * - decoding: unused
2299
     */
2300
    int frame_skip_threshold;
2301

    
2302
    /**
2303
     * frame skip factor
2304
     * - encoding: Set by user.
2305
     * - decoding: unused
2306
     */
2307
    int frame_skip_factor;
2308

    
2309
    /**
2310
     * frame skip exponent
2311
     * - encoding: Set by user.
2312
     * - decoding: unused
2313
     */
2314
    int frame_skip_exp;
2315

    
2316
    /**
2317
     * frame skip comparison function
2318
     * - encoding: Set by user.
2319
     * - decoding: unused
2320
     */
2321
    int frame_skip_cmp;
2322

    
2323
    /**
2324
     * Border processing masking, raises the quantizer for mbs on the borders
2325
     * of the picture.
2326
     * - encoding: Set by user.
2327
     * - decoding: unused
2328
     */
2329
    float border_masking;
2330

    
2331
    /**
2332
     * minimum MB lagrange multipler
2333
     * - encoding: Set by user.
2334
     * - decoding: unused
2335
     */
2336
    int mb_lmin;
2337

    
2338
    /**
2339
     * maximum MB lagrange multipler
2340
     * - encoding: Set by user.
2341
     * - decoding: unused
2342
     */
2343
    int mb_lmax;
2344

    
2345
    /**
2346
     *
2347
     * - encoding: Set by user.
2348
     * - decoding: unused
2349
     */
2350
    int me_penalty_compensation;
2351

    
2352
    /**
2353
     *
2354
     * - encoding: unused
2355
     * - decoding: Set by user.
2356
     */
2357
    enum AVDiscard skip_loop_filter;
2358

    
2359
    /**
2360
     *
2361
     * - encoding: unused
2362
     * - decoding: Set by user.
2363
     */
2364
    enum AVDiscard skip_idct;
2365

    
2366
    /**
2367
     *
2368
     * - encoding: unused
2369
     * - decoding: Set by user.
2370
     */
2371
    enum AVDiscard skip_frame;
2372

    
2373
    /**
2374
     *
2375
     * - encoding: Set by user.
2376
     * - decoding: unused
2377
     */
2378
    int bidir_refine;
2379

    
2380
    /**
2381
     *
2382
     * - encoding: Set by user.
2383
     * - decoding: unused
2384
     */
2385
    int brd_scale;
2386

    
2387
    /**
2388
     * constant rate factor - quality-based VBR - values ~correspond to qps
2389
     * - encoding: Set by user.
2390
     * - decoding: unused
2391
     */
2392
    float crf;
2393

    
2394
    /**
2395
     * constant quantization parameter rate control method
2396
     * - encoding: Set by user.
2397
     * - decoding: unused
2398
     */
2399
    int cqp;
2400

    
2401
    /**
2402
     * minimum GOP size
2403
     * - encoding: Set by user.
2404
     * - decoding: unused
2405
     */
2406
    int keyint_min;
2407

    
2408
    /**
2409
     * number of reference frames
2410
     * - encoding: Set by user.
2411
     * - decoding: Set by lavc.
2412
     */
2413
    int refs;
2414

    
2415
    /**
2416
     * chroma qp offset from luma
2417
     * - encoding: Set by user.
2418
     * - decoding: unused
2419
     */
2420
    int chromaoffset;
2421

    
2422
    /**
2423
     * Influences how often B-frames are used.
2424
     * - encoding: Set by user.
2425
     * - decoding: unused
2426
     */
2427
    int bframebias;
2428

    
2429
    /**
2430
     * trellis RD quantization
2431
     * - encoding: Set by user.
2432
     * - decoding: unused
2433
     */
2434
    int trellis;
2435

    
2436
    /**
2437
     * Reduce fluctuations in qp (before curve compression).
2438
     * - encoding: Set by user.
2439
     * - decoding: unused
2440
     */
2441
    float complexityblur;
2442

    
2443
    /**
2444
     * in-loop deblocking filter alphac0 parameter
2445
     * alpha is in the range -6...6
2446
     * - encoding: Set by user.
2447
     * - decoding: unused
2448
     */
2449
    int deblockalpha;
2450

    
2451
    /**
2452
     * in-loop deblocking filter beta parameter
2453
     * beta is in the range -6...6
2454
     * - encoding: Set by user.
2455
     * - decoding: unused
2456
     */
2457
    int deblockbeta;
2458

    
2459
    /**
2460
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2461
     * - encoding: Set by user.
2462
     * - decoding: unused
2463
     */
2464
    int partitions;
2465
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2466
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2467
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2468
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2469
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2470

    
2471
    /**
2472
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2473
     * - encoding: Set by user.
2474
     * - decoding: unused
2475
     */
2476
    int directpred;
2477

    
2478
    /**
2479
     * Audio cutoff bandwidth (0 means "automatic")
2480
     * - encoding: Set by user.
2481
     * - decoding: unused
2482
     */
2483
    int cutoff;
2484

    
2485
    /**
2486
     * Multiplied by qscale for each frame and added to scene_change_score.
2487
     * - encoding: Set by user.
2488
     * - decoding: unused
2489
     */
2490
    int scenechange_factor;
2491

    
2492
    /**
2493
     *
2494
     * Note: Value depends upon the compare function used for fullpel ME.
2495
     * - encoding: Set by user.
2496
     * - decoding: unused
2497
     */
2498
    int mv0_threshold;
2499

    
2500
    /**
2501
     * Adjusts sensitivity of b_frame_strategy 1.
2502
     * - encoding: Set by user.
2503
     * - decoding: unused
2504
     */
2505
    int b_sensitivity;
2506

    
2507
    /**
2508
     * - encoding: Set by user.
2509
     * - decoding: unused
2510
     */
2511
    int compression_level;
2512
#define FF_COMPRESSION_DEFAULT -1
2513

    
2514
#if FF_API_USE_LPC
2515
    /**
2516
     * Sets whether to use LPC mode - used by FLAC encoder.
2517
     * - encoding: Set by user.
2518
     * - decoding: unused
2519
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2520
     */
2521
    int use_lpc;
2522
#endif
2523

    
2524
    /**
2525
     * LPC coefficient precision - used by FLAC encoder
2526
     * - encoding: Set by user.
2527
     * - decoding: unused
2528
     */
2529
    int lpc_coeff_precision;
2530

    
2531
    /**
2532
     * - encoding: Set by user.
2533
     * - decoding: unused
2534
     */
2535
    int min_prediction_order;
2536

    
2537
    /**
2538
     * - encoding: Set by user.
2539
     * - decoding: unused
2540
     */
2541
    int max_prediction_order;
2542

    
2543
    /**
2544
     * search method for selecting prediction order
2545
     * - encoding: Set by user.
2546
     * - decoding: unused
2547
     */
2548
    int prediction_order_method;
2549

    
2550
    /**
2551
     * - encoding: Set by user.
2552
     * - decoding: unused
2553
     */
2554
    int min_partition_order;
2555

    
2556
    /**
2557
     * - encoding: Set by user.
2558
     * - decoding: unused
2559
     */
2560
    int max_partition_order;
2561

    
2562
    /**
2563
     * GOP timecode frame start number, in non drop frame format
2564
     * - encoding: Set by user.
2565
     * - decoding: unused
2566
     */
2567
    int64_t timecode_frame_start;
2568

    
2569
#if LIBAVCODEC_VERSION_MAJOR < 53
2570
    /**
2571
     * Decoder should decode to this many channels if it can (0 for default)
2572
     * - encoding: unused
2573
     * - decoding: Set by user.
2574
     * @deprecated Deprecated in favor of request_channel_layout.
2575
     */
2576
    int request_channels;
2577
#endif
2578

    
2579
    /**
2580
     * Percentage of dynamic range compression to be applied by the decoder.
2581
     * The default value is 1.0, corresponding to full compression.
2582
     * - encoding: unused
2583
     * - decoding: Set by user.
2584
     */
2585
    float drc_scale;
2586

    
2587
    /**
2588
     * opaque 64bit number (generally a PTS) that will be reordered and
2589
     * output in AVFrame.reordered_opaque
2590
     * @deprecated in favor of pkt_pts
2591
     * - encoding: unused
2592
     * - decoding: Set by user.
2593
     */
2594
    int64_t reordered_opaque;
2595

    
2596
    /**
2597
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2598
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2599
     * - encoding: set by user.
2600
     * - decoding: set by libavcodec.
2601
     */
2602
    int bits_per_raw_sample;
2603

    
2604
    /**
2605
     * Audio channel layout.
2606
     * - encoding: set by user.
2607
     * - decoding: set by libavcodec.
2608
     */
2609
    int64_t channel_layout;
2610

    
2611
    /**
2612
     * Request decoder to use this channel layout if it can (0 for default)
2613
     * - encoding: unused
2614
     * - decoding: Set by user.
2615
     */
2616
    int64_t request_channel_layout;
2617

    
2618
    /**
2619
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2620
     * - encoding: Set by user.
2621
     * - decoding: unused.
2622
     */
2623
    float rc_max_available_vbv_use;
2624

    
2625
    /**
2626
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2627
     * - encoding: Set by user.
2628
     * - decoding: unused.
2629
     */
2630
    float rc_min_vbv_overflow_use;
2631

    
2632
    /**
2633
     * Hardware accelerator in use
2634
     * - encoding: unused.
2635
     * - decoding: Set by libavcodec
2636
     */
2637
    struct AVHWAccel *hwaccel;
2638

    
2639
    /**
2640
     * For some codecs, the time base is closer to the field rate than the frame rate.
2641
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2642
     * if no telecine is used ...
2643
     *
2644
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2645
     */
2646
    int ticks_per_frame;
2647

    
2648
    /**
2649
     * Hardware accelerator context.
2650
     * For some hardware accelerators, a global context needs to be
2651
     * provided by the user. In that case, this holds display-dependent
2652
     * data FFmpeg cannot instantiate itself. Please refer to the
2653
     * FFmpeg HW accelerator documentation to know how to fill this
2654
     * is. e.g. for VA API, this is a struct vaapi_context.
2655
     * - encoding: unused
2656
     * - decoding: Set by user
2657
     */
2658
    void *hwaccel_context;
2659

    
2660
    /**
2661
     * Chromaticity coordinates of the source primaries.
2662
     * - encoding: Set by user
2663
     * - decoding: Set by libavcodec
2664
     */
2665
    enum AVColorPrimaries color_primaries;
2666

    
2667
    /**
2668
     * Color Transfer Characteristic.
2669
     * - encoding: Set by user
2670
     * - decoding: Set by libavcodec
2671
     */
2672
    enum AVColorTransferCharacteristic color_trc;
2673

    
2674
    /**
2675
     * YUV colorspace type.
2676
     * - encoding: Set by user
2677
     * - decoding: Set by libavcodec
2678
     */
2679
    enum AVColorSpace colorspace;
2680

    
2681
    /**
2682
     * MPEG vs JPEG YUV range.
2683
     * - encoding: Set by user
2684
     * - decoding: Set by libavcodec
2685
     */
2686
    enum AVColorRange color_range;
2687

    
2688
    /**
2689
     * This defines the location of chroma samples.
2690
     * - encoding: Set by user
2691
     * - decoding: Set by libavcodec
2692
     */
2693
    enum AVChromaLocation chroma_sample_location;
2694

    
2695
    /**
2696
     * The codec may call this to execute several independent things.
2697
     * It will return only after finishing all tasks.
2698
     * The user may replace this with some multithreaded implementation,
2699
     * the default implementation will execute the parts serially.
2700
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2701
     * @param c context passed also to func
2702
     * @param count the number of things to execute
2703
     * @param arg2 argument passed unchanged to func
2704
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2705
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2706
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2707
     *             two instances of func executing at the same time will have the same threadnr.
2708
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2709
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2710
     * - encoding: Set by libavcodec, user can override.
2711
     * - decoding: Set by libavcodec, user can override.
2712
     */
2713
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2714

    
2715
    /**
2716
     * explicit P-frame weighted prediction analysis method
2717
     * 0: off
2718
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2719
     * 2: smart weighting (full fade detection analysis)
2720
     * - encoding: Set by user.
2721
     * - decoding: unused
2722
     */
2723
    int weighted_p_pred;
2724

    
2725
    /**
2726
     * AQ mode
2727
     * 0: Disabled
2728
     * 1: Variance AQ (complexity mask)
2729
     * 2: Auto-variance AQ (experimental)
2730
     * - encoding: Set by user
2731
     * - decoding: unused
2732
     */
2733
    int aq_mode;
2734

    
2735
    /**
2736
     * AQ strength
2737
     * Reduces blocking and blurring in flat and textured areas.
2738
     * - encoding: Set by user
2739
     * - decoding: unused
2740
     */
2741
    float aq_strength;
2742

    
2743
    /**
2744
     * PSY RD
2745
     * Strength of psychovisual optimization
2746
     * - encoding: Set by user
2747
     * - decoding: unused
2748
     */
2749
    float psy_rd;
2750

    
2751
    /**
2752
     * PSY trellis
2753
     * Strength of psychovisual optimization
2754
     * - encoding: Set by user
2755
     * - decoding: unused
2756
     */
2757
    float psy_trellis;
2758

    
2759
    /**
2760
     * RC lookahead
2761
     * Number of frames for frametype and ratecontrol lookahead
2762
     * - encoding: Set by user
2763
     * - decoding: unused
2764
     */
2765
    int rc_lookahead;
2766

    
2767
    /**
2768
     * Constant rate factor maximum
2769
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2770
     * than crf_max, even if doing so would violate VBV restrictions.
2771
     * - encoding: Set by user.
2772
     * - decoding: unused
2773
     */
2774
    float crf_max;
2775

    
2776
    int log_level_offset;
2777

    
2778
    /**
2779
     * Determines which LPC analysis algorithm to use.
2780
     * - encoding: Set by user
2781
     * - decoding: unused
2782
     */
2783
    enum AVLPCType lpc_type;
2784

    
2785
    /**
2786
     * Number of passes to use for Cholesky factorization during LPC analysis
2787
     * - encoding: Set by user
2788
     * - decoding: unused
2789
     */
2790
    int lpc_passes;
2791

    
2792
    /**
2793
     * Number of slices.
2794
     * Indicates number of picture subdivisions. Used for parallelized
2795
     * decoding.
2796
     * - encoding: Set by user
2797
     * - decoding: unused
2798
     */
2799
    int slices;
2800

    
2801
    /**
2802
     * Header containing style information for text subtitles.
2803
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2804
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2805
     * the Format line following. It shouldn't include any Dialogue line.
2806
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2807
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2808
     */
2809
    uint8_t *subtitle_header;
2810
    int subtitle_header_size;
2811

    
2812
    /**
2813
     * Current packet as passed into the decoder, to avoid having
2814
     * to pass the packet into every function. Currently only valid
2815
     * inside lavc and get/release_buffer callbacks.
2816
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2817
     * - encoding: unused
2818
     */
2819
    AVPacket *pkt;
2820
} AVCodecContext;
2821

    
2822
/**
2823
 * AVProfile.
2824
 */
2825
typedef struct AVProfile {
2826
    int profile;
2827
    const char *name; ///< short name for the profile
2828
} AVProfile;
2829

    
2830
/**
2831
 * AVCodec.
2832
 */
2833
typedef struct AVCodec {
2834
    /**
2835
     * Name of the codec implementation.
2836
     * The name is globally unique among encoders and among decoders (but an
2837
     * encoder and a decoder can share the same name).
2838
     * This is the primary way to find a codec from the user perspective.
2839
     */
2840
    const char *name;
2841
    enum AVMediaType type;
2842
    enum CodecID id;
2843
    int priv_data_size;
2844
    int (*init)(AVCodecContext *);
2845
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2846
    int (*close)(AVCodecContext *);
2847
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2848
    /**
2849
     * Codec capabilities.
2850
     * see CODEC_CAP_*
2851
     */
2852
    int capabilities;
2853
    struct AVCodec *next;
2854
    /**
2855
     * Flush buffers.
2856
     * Will be called when seeking
2857
     */
2858
    void (*flush)(AVCodecContext *);
2859
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2860
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2861
    /**
2862
     * Descriptive name for the codec, meant to be more human readable than name.
2863
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2864
     */
2865
    const char *long_name;
2866
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2867
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2868
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2869
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2870
    AVClass *priv_class;                    ///< AVClass for the private context
2871
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2872
} AVCodec;
2873

    
2874
/**
2875
 * AVHWAccel.
2876
 */
2877
typedef struct AVHWAccel {
2878
    /**
2879
     * Name of the hardware accelerated codec.
2880
     * The name is globally unique among encoders and among decoders (but an
2881
     * encoder and a decoder can share the same name).
2882
     */
2883
    const char *name;
2884

    
2885
    /**
2886
     * Type of codec implemented by the hardware accelerator.
2887
     *
2888
     * See AVMEDIA_TYPE_xxx
2889
     */
2890
    enum AVMediaType type;
2891

    
2892
    /**
2893
     * Codec implemented by the hardware accelerator.
2894
     *
2895
     * See CODEC_ID_xxx
2896
     */
2897
    enum CodecID id;
2898

    
2899
    /**
2900
     * Supported pixel format.
2901
     *
2902
     * Only hardware accelerated formats are supported here.
2903
     */
2904
    enum PixelFormat pix_fmt;
2905

    
2906
    /**
2907
     * Hardware accelerated codec capabilities.
2908
     * see FF_HWACCEL_CODEC_CAP_*
2909
     */
2910
    int capabilities;
2911

    
2912
    struct AVHWAccel *next;
2913

    
2914
    /**
2915
     * Called at the beginning of each frame or field picture.
2916
     *
2917
     * Meaningful frame information (codec specific) is guaranteed to
2918
     * be parsed at this point. This function is mandatory.
2919
     *
2920
     * Note that buf can be NULL along with buf_size set to 0.
2921
     * Otherwise, this means the whole frame is available at this point.
2922
     *
2923
     * @param avctx the codec context
2924
     * @param buf the frame data buffer base
2925
     * @param buf_size the size of the frame in bytes
2926
     * @return zero if successful, a negative value otherwise
2927
     */
2928
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2929

    
2930
    /**
2931
     * Callback for each slice.
2932
     *
2933
     * Meaningful slice information (codec specific) is guaranteed to
2934
     * be parsed at this point. This function is mandatory.
2935
     *
2936
     * @param avctx the codec context
2937
     * @param buf the slice data buffer base
2938
     * @param buf_size the size of the slice in bytes
2939
     * @return zero if successful, a negative value otherwise
2940
     */
2941
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2942

    
2943
    /**
2944
     * Called at the end of each frame or field picture.
2945
     *
2946
     * The whole picture is parsed at this point and can now be sent
2947
     * to the hardware accelerator. This function is mandatory.
2948
     *
2949
     * @param avctx the codec context
2950
     * @return zero if successful, a negative value otherwise
2951
     */
2952
    int (*end_frame)(AVCodecContext *avctx);
2953

    
2954
    /**
2955
     * Size of HW accelerator private data.
2956
     *
2957
     * Private data is allocated with av_mallocz() before
2958
     * AVCodecContext.get_buffer() and deallocated after
2959
     * AVCodecContext.release_buffer().
2960
     */
2961
    int priv_data_size;
2962
} AVHWAccel;
2963

    
2964
/**
2965
 * four components are given, that's all.
2966
 * the last component is alpha
2967
 */
2968
typedef struct AVPicture {
2969
    uint8_t *data[4];
2970
    int linesize[4];       ///< number of bytes per line
2971
} AVPicture;
2972

    
2973
#if FF_API_PALETTE_CONTROL
2974
/**
2975
 * AVPaletteControl
2976
 * This structure defines a method for communicating palette changes
2977
 * between and demuxer and a decoder.
2978
 *
2979
 * @deprecated Use AVPacket to send palette changes instead.
2980
 * This is totally broken.
2981
 */
2982
#define AVPALETTE_SIZE 1024
2983
#define AVPALETTE_COUNT 256
2984
typedef struct AVPaletteControl {
2985

    
2986
    /* Demuxer sets this to 1 to indicate the palette has changed;
2987
     * decoder resets to 0. */
2988
    int palette_changed;
2989

    
2990
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2991
     * the individual palette components should be on a 8-bit scale; if
2992
     * the palette data comes from an IBM VGA native format, the component
2993
     * data is probably 6 bits in size and needs to be scaled. */
2994
    unsigned int palette[AVPALETTE_COUNT];
2995

    
2996
} AVPaletteControl attribute_deprecated;
2997
#endif
2998

    
2999
enum AVSubtitleType {
3000
    SUBTITLE_NONE,
3001

    
3002
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3003

    
3004
    /**
3005
     * Plain text, the text field must be set by the decoder and is
3006
     * authoritative. ass and pict fields may contain approximations.
3007
     */
3008
    SUBTITLE_TEXT,
3009

    
3010
    /**
3011
     * Formatted text, the ass field must be set by the decoder and is
3012
     * authoritative. pict and text fields may contain approximations.
3013
     */
3014
    SUBTITLE_ASS,
3015
};
3016

    
3017
typedef struct AVSubtitleRect {
3018
    int x;         ///< top left corner  of pict, undefined when pict is not set
3019
    int y;         ///< top left corner  of pict, undefined when pict is not set
3020
    int w;         ///< width            of pict, undefined when pict is not set
3021
    int h;         ///< height           of pict, undefined when pict is not set
3022
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3023

    
3024
    /**
3025
     * data+linesize for the bitmap of this subtitle.
3026
     * can be set for text/ass as well once they where rendered
3027
     */
3028
    AVPicture pict;
3029
    enum AVSubtitleType type;
3030

    
3031
    char *text;                     ///< 0 terminated plain UTF-8 text
3032

    
3033
    /**
3034
     * 0 terminated ASS/SSA compatible event line.
3035
     * The pressentation of this is unaffected by the other values in this
3036
     * struct.
3037
     */
3038
    char *ass;
3039
} AVSubtitleRect;
3040

    
3041
typedef struct AVSubtitle {
3042
    uint16_t format; /* 0 = graphics */
3043
    uint32_t start_display_time; /* relative to packet pts, in ms */
3044
    uint32_t end_display_time; /* relative to packet pts, in ms */
3045
    unsigned num_rects;
3046
    AVSubtitleRect **rects;
3047
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3048
} AVSubtitle;
3049

    
3050
/* packet functions */
3051

    
3052
/**
3053
 * @deprecated use NULL instead
3054
 */
3055
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3056

    
3057
/**
3058
 * Default packet destructor.
3059
 */
3060
void av_destruct_packet(AVPacket *pkt);
3061

    
3062
/**
3063
 * Initialize optional fields of a packet with default values.
3064
 *
3065
 * @param pkt packet
3066
 */
3067
void av_init_packet(AVPacket *pkt);
3068

    
3069
/**
3070
 * Allocate the payload of a packet and initialize its fields with
3071
 * default values.
3072
 *
3073
 * @param pkt packet
3074
 * @param size wanted payload size
3075
 * @return 0 if OK, AVERROR_xxx otherwise
3076
 */
3077
int av_new_packet(AVPacket *pkt, int size);
3078

    
3079
/**
3080
 * Reduce packet size, correctly zeroing padding
3081
 *
3082
 * @param pkt packet
3083
 * @param size new size
3084
 */
3085
void av_shrink_packet(AVPacket *pkt, int size);
3086

    
3087
/**
3088
 * Increase packet size, correctly zeroing padding
3089
 *
3090
 * @param pkt packet
3091
 * @param grow_by number of bytes by which to increase the size of the packet
3092
 */
3093
int av_grow_packet(AVPacket *pkt, int grow_by);
3094

    
3095
/**
3096
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3097
 * packet is allocated if it was not really allocated.
3098
 */
3099
int av_dup_packet(AVPacket *pkt);
3100

    
3101
/**
3102
 * Free a packet.
3103
 *
3104
 * @param pkt packet to free
3105
 */
3106
void av_free_packet(AVPacket *pkt);
3107

    
3108
/* resample.c */
3109

    
3110
struct ReSampleContext;
3111
struct AVResampleContext;
3112

    
3113
typedef struct ReSampleContext ReSampleContext;
3114

    
3115
#if FF_API_AUDIO_OLD
3116
/**
3117
 * @deprecated Use av_audio_resample_init() instead.
3118
 */
3119
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3120
                                                          int output_rate, int input_rate);
3121
#endif
3122
/**
3123
 *  Initialize audio resampling context
3124
 *
3125
 * @param output_channels  number of output channels
3126
 * @param input_channels   number of input channels
3127
 * @param output_rate      output sample rate
3128
 * @param input_rate       input sample rate
3129
 * @param sample_fmt_out   requested output sample format
3130
 * @param sample_fmt_in    input sample format
3131
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff freq
3132
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3133
 * @param linear           If 1 then the used FIR filter will be linearly interpolated
3134
                           between the 2 closest, if 0 the closest will be used
3135
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3136
 * @return allocated ReSampleContext, NULL if error occured
3137
 */
3138
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3139
                                        int output_rate, int input_rate,
3140
                                        enum AVSampleFormat sample_fmt_out,
3141
                                        enum AVSampleFormat sample_fmt_in,
3142
                                        int filter_length, int log2_phase_count,
3143
                                        int linear, double cutoff);
3144

    
3145
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3146
void audio_resample_close(ReSampleContext *s);
3147

    
3148

    
3149
/**
3150
 * Initialize an audio resampler.
3151
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3152
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3153
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3154
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3155
                 between the 2 closest, if 0 the closest will be used
3156
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3157
 */
3158
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3159

    
3160
/**
3161
 * Resample an array of samples using a previously configured context.
3162
 * @param src an array of unconsumed samples
3163
 * @param consumed the number of samples of src which have been consumed are returned here
3164
 * @param src_size the number of unconsumed samples available
3165
 * @param dst_size the amount of space in samples available in dst
3166
 * @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.
3167
 * @return the number of samples written in dst or -1 if an error occurred
3168
 */
3169
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3170

    
3171

    
3172
/**
3173
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3174
 * the resampler parameters, so no audible clicks or similar distortions occur
3175
 * @param compensation_distance distance in output samples over which the compensation should be performed
3176
 * @param sample_delta number of output samples which should be output less
3177
 *
3178
 * example: av_resample_compensate(c, 10, 500)
3179
 * here instead of 510 samples only 500 samples would be output
3180
 *
3181
 * note, due to rounding the actual compensation might be slightly different,
3182
 * especially if the compensation_distance is large and the in_rate used during init is small
3183
 */
3184
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3185
void av_resample_close(struct AVResampleContext *c);
3186

    
3187
/**
3188
 * Allocate memory for a picture.  Call avpicture_free to free it.
3189
 *
3190
 * @param picture the picture to be filled in
3191
 * @param pix_fmt the format of the picture
3192
 * @param width the width of the picture
3193
 * @param height the height of the picture
3194
 * @return zero if successful, a negative value if not
3195
 */
3196
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3197

    
3198
/**
3199
 * Free a picture previously allocated by avpicture_alloc().
3200
 *
3201
 * @param picture the AVPicture to be freed
3202
 */
3203
void avpicture_free(AVPicture *picture);
3204

    
3205
/**
3206
 * Fill in the AVPicture fields.
3207
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3208
 * which points to the image data buffer. Depending on the specified picture
3209
 * format, one or multiple image data pointers and line sizes will be set.
3210
 * If a planar format is specified, several pointers will be set pointing to
3211
 * the different picture planes and the line sizes of the different planes
3212
 * will be stored in the lines_sizes array.
3213
 * Call with ptr == NULL to get the required size for the ptr buffer.
3214
 *
3215
 * @param picture AVPicture whose fields are to be filled in
3216
 * @param ptr Buffer which will contain or contains the actual image data
3217
 * @param pix_fmt The format in which the picture data is stored.
3218
 * @param width the width of the image in pixels
3219
 * @param height the height of the image in pixels
3220
 * @return size of the image data in bytes
3221
 */
3222
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3223
                   enum PixelFormat pix_fmt, int width, int height);
3224
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3225
                     unsigned char *dest, int dest_size);
3226

    
3227
/**
3228
 * Calculate the size in bytes that a picture of the given width and height
3229
 * would occupy if stored in the given picture format.
3230
 * Note that this returns the size of a compact representation as generated
3231
 * by avpicture_layout, which can be smaller than the size required for e.g.
3232
 * avpicture_fill.
3233
 *
3234
 * @param pix_fmt the given picture format
3235
 * @param width the width of the image
3236
 * @param height the height of the image
3237
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3238
 */
3239
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3240
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3241
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3242
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3243

    
3244
#if LIBAVCODEC_VERSION_MAJOR < 53
3245
/**
3246
 * Return the pixel format corresponding to the name name.
3247
 *
3248
 * If there is no pixel format with name name, then look for a
3249
 * pixel format with the name corresponding to the native endian
3250
 * format of name.
3251
 * For example in a little-endian system, first look for "gray16",
3252
 * then for "gray16le".
3253
 *
3254
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3255
 *
3256
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3257
 */
3258
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3259
#endif
3260

    
3261
/**
3262
 * Return a value representing the fourCC code associated to the
3263
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3264
 * found.
3265
 */
3266
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3267

    
3268
/**
3269
 * Put a string representing the codec tag codec_tag in buf.
3270
 *
3271
 * @param buf_size size in bytes of buf
3272
 * @return the length of the string that would have been generated if
3273
 * enough space had been available, excluding the trailing null
3274
 */
3275
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3276

    
3277
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3278
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3279
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3280
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3281
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3282
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3283

    
3284
/**
3285
 * Compute what kind of losses will occur when converting from one specific
3286
 * pixel format to another.
3287
 * When converting from one pixel format to another, information loss may occur.
3288
 * For example, when converting from RGB24 to GRAY, the color information will
3289
 * be lost. Similarly, other losses occur when converting from some formats to
3290
 * other formats. These losses can involve loss of chroma, but also loss of
3291
 * resolution, loss of color depth, loss due to the color space conversion, loss
3292
 * of the alpha bits or loss due to color quantization.
3293
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3294
 * which will occur when converting from one pixel format to another.
3295
 *
3296
 * @param[in] dst_pix_fmt destination pixel format
3297
 * @param[in] src_pix_fmt source pixel format
3298
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3299
 * @return Combination of flags informing you what kind of losses will occur.
3300
 */
3301
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3302
                             int has_alpha);
3303

    
3304
/**
3305
 * Find the best pixel format to convert to given a certain source pixel
3306
 * format.  When converting from one pixel format to another, information loss
3307
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3308
 * information will be lost. Similarly, other losses occur when converting from
3309
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3310
 * the given pixel formats should be used to suffer the least amount of loss.
3311
 * The pixel formats from which it chooses one, are determined by the
3312
 * pix_fmt_mask parameter.
3313
 *
3314
 * @code
3315
 * src_pix_fmt = PIX_FMT_YUV420P;
3316
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3317
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3318
 * @endcode
3319
 *
3320
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3321
 * @param[in] src_pix_fmt source pixel format
3322
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3323
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3324
 * @return The best pixel format to convert to or -1 if none was found.
3325
 */
3326
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3327
                              int has_alpha, int *loss_ptr);
3328

    
3329
#if LIBAVCODEC_VERSION_MAJOR < 53
3330
/**
3331
 * @deprecated Use av_get_pix_fmt_string() instead.
3332
 */
3333
attribute_deprecated
3334
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3335
#endif
3336

    
3337
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3338
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3339

    
3340
/**
3341
 * Tell if an image really has transparent alpha values.
3342
 * @return ored mask of FF_ALPHA_xxx constants
3343
 */
3344
int img_get_alpha_info(const AVPicture *src,
3345
                       enum PixelFormat pix_fmt, int width, int height);
3346

    
3347
/* deinterlace a picture */
3348
/* deinterlace - if not supported return -1 */
3349
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3350
                          enum PixelFormat pix_fmt, int width, int height);
3351

    
3352
/* external high level API */
3353

    
3354
/**
3355
 * If c is NULL, returns the first registered codec,
3356
 * if c is non-NULL, returns the next registered codec after c,
3357
 * or NULL if c is the last one.
3358
 */
3359
AVCodec *av_codec_next(AVCodec *c);
3360

    
3361
/**
3362
 * Return the LIBAVCODEC_VERSION_INT constant.
3363
 */
3364
unsigned avcodec_version(void);
3365

    
3366
/**
3367
 * Return the libavcodec build-time configuration.
3368
 */
3369
const char *avcodec_configuration(void);
3370

    
3371
/**
3372
 * Return the libavcodec license.
3373
 */
3374
const char *avcodec_license(void);
3375

    
3376
/**
3377
 * Initialize libavcodec.
3378
 *
3379
 * @warning This function must be called before any other libavcodec
3380
 * function.
3381
 */
3382
void avcodec_init(void);
3383

    
3384
#if LIBAVCODEC_VERSION_MAJOR < 53
3385
/**
3386
 * @deprecated Deprecated in favor of avcodec_register().
3387
 */
3388
attribute_deprecated void register_avcodec(AVCodec *codec);
3389
#endif
3390

    
3391
/**
3392
 * Register the codec codec and initialize libavcodec.
3393
 *
3394
 * @see avcodec_init()
3395
 */
3396
void avcodec_register(AVCodec *codec);
3397

    
3398
/**
3399
 * Find a registered encoder with a matching codec ID.
3400
 *
3401
 * @param id CodecID of the requested encoder
3402
 * @return An encoder if one was found, NULL otherwise.
3403
 */
3404
AVCodec *avcodec_find_encoder(enum CodecID id);
3405

    
3406
/**
3407
 * Find a registered encoder with the specified name.
3408
 *
3409
 * @param name name of the requested encoder
3410
 * @return An encoder if one was found, NULL otherwise.
3411
 */
3412
AVCodec *avcodec_find_encoder_by_name(const char *name);
3413

    
3414
/**
3415
 * Find a registered decoder with a matching codec ID.
3416
 *
3417
 * @param id CodecID of the requested decoder
3418
 * @return A decoder if one was found, NULL otherwise.
3419
 */
3420
AVCodec *avcodec_find_decoder(enum CodecID id);
3421

    
3422
/**
3423
 * Find a registered decoder with the specified name.
3424
 *
3425
 * @param name name of the requested decoder
3426
 * @return A decoder if one was found, NULL otherwise.
3427
 */
3428
AVCodec *avcodec_find_decoder_by_name(const char *name);
3429
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3430

    
3431
/**
3432
 * Return a name for the specified profile, if available.
3433
 *
3434
 * @param codec the codec that is searched for the given profile
3435
 * @param profile the profile value for which a name is requested
3436
 * @return A name for the profile if found, NULL otherwise.
3437
 */
3438
const char *av_get_profile_name(const AVCodec *codec, int profile);
3439

    
3440
/**
3441
 * Set the fields of the given AVCodecContext to default values.
3442
 *
3443
 * @param s The AVCodecContext of which the fields should be set to default values.
3444
 */
3445
void avcodec_get_context_defaults(AVCodecContext *s);
3446

    
3447
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3448
 *  we WILL change its arguments and name a few times! */
3449
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3450

    
3451
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3452
 *  we WILL change its arguments and name a few times! */
3453
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3454

    
3455
/**
3456
 * Allocate an AVCodecContext and set its fields to default values.  The
3457
 * resulting struct can be deallocated by simply calling av_free().
3458
 *
3459
 * @return An AVCodecContext filled with default values or NULL on failure.
3460
 * @see avcodec_get_context_defaults
3461
 */
3462
AVCodecContext *avcodec_alloc_context(void);
3463

    
3464
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3465
 *  we WILL change its arguments and name a few times! */
3466
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3467

    
3468
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3469
 *  we WILL change its arguments and name a few times! */
3470
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3471

    
3472
/**
3473
 * Copy the settings of the source AVCodecContext into the destination
3474
 * AVCodecContext. The resulting destination codec context will be
3475
 * unopened, i.e. you are required to call avcodec_open() before you
3476
 * can use this AVCodecContext to decode/encode video/audio data.
3477
 *
3478
 * @param dest target codec context, should be initialized with
3479
 *             avcodec_alloc_context(), but otherwise uninitialized
3480
 * @param src source codec context
3481
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3482
 */
3483
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3484

    
3485
/**
3486
 * Set the fields of the given AVFrame to default values.
3487
 *
3488
 * @param pic The AVFrame of which the fields should be set to default values.
3489
 */
3490
void avcodec_get_frame_defaults(AVFrame *pic);
3491

    
3492
/**
3493
 * Allocate an AVFrame and set its fields to default values.  The resulting
3494
 * struct can be deallocated by simply calling av_free().
3495
 *
3496
 * @return An AVFrame filled with default values or NULL on failure.
3497
 * @see avcodec_get_frame_defaults
3498
 */
3499
AVFrame *avcodec_alloc_frame(void);
3500

    
3501
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3502
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3503
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3504

    
3505
/**
3506
 * Return the amount of padding in pixels which the get_buffer callback must
3507
 * provide around the edge of the image for codecs which do not have the
3508
 * CODEC_FLAG_EMU_EDGE flag.
3509
 *
3510
 * @return Required padding in pixels.
3511
 */
3512
unsigned avcodec_get_edge_width(void);
3513
/**
3514
 * Modify width and height values so that they will result in a memory
3515
 * buffer that is acceptable for the codec if you do not use any horizontal
3516
 * padding.
3517
 *
3518
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3519
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3520
 * according to avcodec_get_edge_width() before.
3521
 */
3522
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3523
/**
3524
 * Modify width and height values so that they will result in a memory
3525
 * buffer that is acceptable for the codec if you also ensure that all
3526
 * line sizes are a multiple of the respective linesize_align[i].
3527
 *
3528
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3529
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3530
 * according to avcodec_get_edge_width() before.
3531
 */
3532
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3533
                               int linesize_align[4]);
3534

    
3535
#if LIBAVCODEC_VERSION_MAJOR < 53
3536
/**
3537
 * @deprecated Deprecated in favor of av_check_image_size().
3538
 */
3539
attribute_deprecated
3540
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3541
#endif
3542

    
3543
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3544

    
3545
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3546
void avcodec_thread_free(AVCodecContext *s);
3547
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3548
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3549
//FIXME func typedef
3550

    
3551
/**
3552
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3553
 * function the context has to be allocated.
3554
 *
3555
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3556
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3557
 * retrieving a codec.
3558
 *
3559
 * @warning This function is not thread safe!
3560
 *
3561
 * @code
3562
 * avcodec_register_all();
3563
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3564
 * if (!codec)
3565
 *     exit(1);
3566
 *
3567
 * context = avcodec_alloc_context();
3568
 *
3569
 * if (avcodec_open(context, codec) < 0)
3570
 *     exit(1);
3571
 * @endcode
3572
 *
3573
 * @param avctx The context which will be set up to use the given codec.
3574
 * @param codec The codec to use within the context.
3575
 * @return zero on success, a negative value on error
3576
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3577
 */
3578
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3579

    
3580
#if FF_API_AUDIO_OLD
3581
/**
3582
 * Decode an audio frame from buf into samples.
3583
 * Wrapper function which calls avcodec_decode_audio3.
3584
 *
3585
 * @deprecated Use avcodec_decode_audio3 instead.
3586
 * @param avctx the codec context
3587
 * @param[out] samples the output buffer
3588
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3589
 * @param[in] buf the input buffer
3590
 * @param[in] buf_size the input buffer size in bytes
3591
 * @return On error a negative value is returned, otherwise the number of bytes
3592
 * used or zero if no frame could be decompressed.
3593
 */
3594
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3595
                         int *frame_size_ptr,
3596
                         const uint8_t *buf, int buf_size);
3597
#endif
3598

    
3599
/**
3600
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3601
 * Some decoders may support multiple frames in a single AVPacket, such
3602
 * decoders would then just decode the first frame. In this case,
3603
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3604
 * the remaining data in order to decode the second frame etc.
3605
 * If no frame
3606
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3607
 * decompressed frame size in bytes.
3608
 *
3609
 * @warning You must set frame_size_ptr to the allocated size of the
3610
 * output buffer before calling avcodec_decode_audio3().
3611
 *
3612
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3613
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3614
 * bits at once and could read over the end.
3615
 *
3616
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3617
 * no overreading happens for damaged MPEG streams.
3618
 *
3619
 * @note You might have to align the input buffer avpkt->data and output buffer
3620
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3621
 * necessary at all, on others it won't work at all if not aligned and on others
3622
 * it will work but it will have an impact on performance.
3623
 *
3624
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3625
 * samples should be 16 byte aligned unless the CPU doesn't need it
3626
 * (AltiVec and SSE do).
3627
 *
3628
 * @param avctx the codec context
3629
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3630
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3631
 * @param[in] avpkt The input AVPacket containing the input buffer.
3632
 *            You can create such packet with av_init_packet() and by then setting
3633
 *            data and size, some decoders might in addition need other fields.
3634
 *            All decoders are designed to use the least fields possible though.
3635
 * @return On error a negative value is returned, otherwise the number of bytes
3636
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3637
 */
3638
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3639
                         int *frame_size_ptr,
3640
                         AVPacket *avpkt);
3641

    
3642
#if FF_API_VIDEO_OLD
3643
/**
3644
 * Decode a video frame from buf into picture.
3645
 * Wrapper function which calls avcodec_decode_video2.
3646
 *
3647
 * @deprecated Use avcodec_decode_video2 instead.
3648
 * @param avctx the codec context
3649
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3650
 * @param[in] buf the input buffer
3651
 * @param[in] buf_size the size of the input buffer in bytes
3652
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3653
 * @return On error a negative value is returned, otherwise the number of bytes
3654
 * used or zero if no frame could be decompressed.
3655
 */
3656
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3657
                         int *got_picture_ptr,
3658
                         const uint8_t *buf, int buf_size);
3659
#endif
3660

    
3661
/**
3662
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3663
 * Some decoders may support multiple frames in a single AVPacket, such
3664
 * decoders would then just decode the first frame.
3665
 *
3666
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3667
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3668
 * bits at once and could read over the end.
3669
 *
3670
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3671
 * no overreading happens for damaged MPEG streams.
3672
 *
3673
 * @note You might have to align the input buffer avpkt->data.
3674
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3675
 * necessary at all, on others it won't work at all if not aligned and on others
3676
 * it will work but it will have an impact on performance.
3677
 *
3678
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3679
 *
3680
 * @note Some codecs have a delay between input and output, these need to be
3681
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3682
 *
3683
 * @param avctx the codec context
3684
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3685
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3686
 *             allocate memory for the actual bitmap.
3687
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3688
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3689
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3690
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3691
 *
3692
 * @param[in] avpkt The input AVpacket containing the input buffer.
3693
 *            You can create such packet with av_init_packet() and by then setting
3694
 *            data and size, some decoders might in addition need other fields like
3695
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3696
 *            fields possible.
3697
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3698
 * @return On error a negative value is returned, otherwise the number of bytes
3699
 * used or zero if no frame could be decompressed.
3700
 */
3701
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3702
                         int *got_picture_ptr,
3703
                         AVPacket *avpkt);
3704

    
3705
#if FF_API_SUBTITLE_OLD
3706
/* Decode a subtitle message. Return -1 if error, otherwise return the
3707
 * number of bytes used. If no subtitle could be decompressed,
3708
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3709
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3710
                            int *got_sub_ptr,
3711
                            const uint8_t *buf, int buf_size);
3712
#endif
3713

    
3714
/**
3715
 * Decode a subtitle message.
3716
 * Return a negative value on error, otherwise return the number of bytes used.
3717
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3718
 * Otherwise, the subtitle is stored in *sub.
3719
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3720
 * simplicity, because the performance difference is expect to be negligible
3721
 * and reusing a get_buffer written for video codecs would probably perform badly
3722
 * due to a potentially very different allocation pattern.
3723
 *
3724
 * @param avctx the codec context
3725
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3726
                   freed with avsubtitle_free if *got_sub_ptr is set.
3727
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3728
 * @param[in] avpkt The input AVPacket containing the input buffer.
3729
 */
3730
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3731
                            int *got_sub_ptr,
3732
                            AVPacket *avpkt);
3733

    
3734
/**
3735
 * Frees all allocated data in the given subtitle struct.
3736
 *
3737
 * @param sub AVSubtitle to free.
3738
 */
3739
void avsubtitle_free(AVSubtitle *sub);
3740

    
3741
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3742
                        int *data_size_ptr,
3743
                        uint8_t *buf, int buf_size);
3744

    
3745
/**
3746
 * Encode an audio frame from samples into buf.
3747
 *
3748
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3749
 * However, for PCM audio the user will know how much space is needed
3750
 * because it depends on the value passed in buf_size as described
3751
 * below. In that case a lower value can be used.
3752
 *
3753
 * @param avctx the codec context
3754
 * @param[out] buf the output buffer
3755
 * @param[in] buf_size the output buffer size
3756
 * @param[in] samples the input buffer containing the samples
3757
 * The number of samples read from this buffer is frame_size*channels,
3758
 * both of which are defined in avctx.
3759
 * For PCM audio the number of samples read from samples is equal to
3760
 * buf_size * input_sample_size / output_sample_size.
3761
 * @return On error a negative value is returned, on success zero or the number
3762
 * of bytes used to encode the data read from the input buffer.
3763
 */
3764
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3765
                         const short *samples);
3766

    
3767
/**
3768
 * Encode a video frame from pict into buf.
3769
 * The input picture should be
3770
 * stored using a specific format, namely avctx.pix_fmt.
3771
 *
3772
 * @param avctx the codec context
3773
 * @param[out] buf the output buffer for the bitstream of encoded frame
3774
 * @param[in] buf_size the size of the output buffer in bytes
3775
 * @param[in] pict the input picture to encode
3776
 * @return On error a negative value is returned, on success zero or the number
3777
 * of bytes used from the output buffer.
3778
 */
3779
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3780
                         const AVFrame *pict);
3781
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3782
                            const AVSubtitle *sub);
3783

    
3784
int avcodec_close(AVCodecContext *avctx);
3785

    
3786
/**
3787
 * Register all the codecs, parsers and bitstream filters which were enabled at
3788
 * configuration time. If you do not call this function you can select exactly
3789
 * which formats you want to support, by using the individual registration
3790
 * functions.
3791
 *
3792
 * @see avcodec_register
3793
 * @see av_register_codec_parser
3794
 * @see av_register_bitstream_filter
3795
 */
3796
void avcodec_register_all(void);
3797

    
3798
/**
3799
 * Flush buffers, should be called when seeking or when switching to a different stream.
3800
 */
3801
void avcodec_flush_buffers(AVCodecContext *avctx);
3802

    
3803
void avcodec_default_free_buffers(AVCodecContext *s);
3804

    
3805
/* misc useful functions */
3806

    
3807
/**
3808
 * Return a single letter to describe the given picture type pict_type.
3809
 *
3810
 * @param[in] pict_type the picture type
3811
 * @return A single character representing the picture type.
3812
 */
3813
char av_get_pict_type_char(int pict_type);
3814

    
3815
/**
3816
 * Return codec bits per sample.
3817
 *
3818
 * @param[in] codec_id the codec
3819
 * @return Number of bits per sample or zero if unknown for the given codec.
3820
 */
3821
int av_get_bits_per_sample(enum CodecID codec_id);
3822

    
3823
#if FF_API_OLD_SAMPLE_FMT
3824
/**
3825
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3826
 */
3827
attribute_deprecated
3828
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3829
#endif
3830

    
3831
/* frame parsing */
3832
typedef struct AVCodecParserContext {
3833
    void *priv_data;
3834
    struct AVCodecParser *parser;
3835
    int64_t frame_offset; /* offset of the current frame */
3836
    int64_t cur_offset; /* current offset
3837
                           (incremented by each av_parser_parse()) */
3838
    int64_t next_frame_offset; /* offset of the next frame */
3839
    /* video info */
3840
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3841
    /**
3842
     * This field is used for proper frame duration computation in lavf.
3843
     * It signals, how much longer the frame duration of the current frame
3844
     * is compared to normal frame duration.
3845
     *
3846
     * frame_duration = (1 + repeat_pict) * time_base
3847
     *
3848
     * It is used by codecs like H.264 to display telecined material.
3849
     */
3850
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3851
    int64_t pts;     /* pts of the current frame */
3852
    int64_t dts;     /* dts of the current frame */
3853

    
3854
    /* private data */
3855
    int64_t last_pts;
3856
    int64_t last_dts;
3857
    int fetch_timestamp;
3858

    
3859
#define AV_PARSER_PTS_NB 4
3860
    int cur_frame_start_index;
3861
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3862
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3863
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3864

    
3865
    int flags;
3866
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3867
#define PARSER_FLAG_ONCE                      0x0002
3868
/// Set if the parser has a valid file offset
3869
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3870

    
3871
    int64_t offset;      ///< byte offset from starting packet start
3872
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3873

    
3874
    /*!
3875
     * Set by parser to 1 for key frames and 0 for non-key frames.
3876
     * It is initialized to -1, so if the parser doesn't set this flag,
3877
     * old-style fallback using FF_I_TYPE picture type as key frames
3878
     * will be used.
3879
     */
3880
    int key_frame;
3881

    
3882
    /**
3883
     * Time difference in stream time base units from the pts of this
3884
     * packet to the point at which the output from the decoder has converged
3885
     * independent from the availability of previous frames. That is, the
3886
     * frames are virtually identical no matter if decoding started from
3887
     * the very first frame or from this keyframe.
3888
     * Is AV_NOPTS_VALUE if unknown.
3889
     * This field is not the display duration of the current frame.
3890
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3891
     * set.
3892
     *
3893
     * The purpose of this field is to allow seeking in streams that have no
3894
     * keyframes in the conventional sense. It corresponds to the
3895
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3896
     * essential for some types of subtitle streams to ensure that all
3897
     * subtitles are correctly displayed after seeking.
3898
     */
3899
    int64_t convergence_duration;
3900

    
3901
    // Timestamp generation support:
3902
    /**
3903
     * Synchronization point for start of timestamp generation.
3904
     *
3905
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3906
     * (default).
3907
     *
3908
     * For example, this corresponds to presence of H.264 buffering period
3909
     * SEI message.
3910
     */
3911
    int dts_sync_point;
3912

    
3913
    /**
3914
     * Offset of the current timestamp against last timestamp sync point in
3915
     * units of AVCodecContext.time_base.
3916
     *
3917
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3918
     * contain a valid timestamp offset.
3919
     *
3920
     * Note that the timestamp of sync point has usually a nonzero
3921
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3922
     * the next frame after timestamp sync point will be usually 1.
3923
     *
3924
     * For example, this corresponds to H.264 cpb_removal_delay.
3925
     */
3926
    int dts_ref_dts_delta;
3927

    
3928
    /**
3929
     * Presentation delay of current frame in units of AVCodecContext.time_base.
3930
     *
3931
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3932
     * contain valid non-negative timestamp delta (presentation time of a frame
3933
     * must not lie in the past).
3934
     *
3935
     * This delay represents the difference between decoding and presentation
3936
     * time of the frame.
3937
     *
3938
     * For example, this corresponds to H.264 dpb_output_delay.
3939
     */
3940
    int pts_dts_delta;
3941

    
3942
    /**
3943
     * Position of the packet in file.
3944
     *
3945
     * Analogous to cur_frame_pts/dts
3946
     */
3947
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3948

    
3949
    /**
3950
     * Byte position of currently parsed frame in stream.
3951
     */
3952
    int64_t pos;
3953

    
3954
    /**
3955
     * Previous frame byte position.
3956
     */
3957
    int64_t last_pos;
3958
} AVCodecParserContext;
3959

    
3960
typedef struct AVCodecParser {
3961
    int codec_ids[5]; /* several codec IDs are permitted */
3962
    int priv_data_size;
3963
    int (*parser_init)(AVCodecParserContext *s);
3964
    int (*parser_parse)(AVCodecParserContext *s,
3965
                        AVCodecContext *avctx,
3966
                        const uint8_t **poutbuf, int *poutbuf_size,
3967
                        const uint8_t *buf, int buf_size);
3968
    void (*parser_close)(AVCodecParserContext *s);
3969
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3970
    struct AVCodecParser *next;
3971
} AVCodecParser;
3972

    
3973
AVCodecParser *av_parser_next(AVCodecParser *c);
3974

    
3975
void av_register_codec_parser(AVCodecParser *parser);
3976
AVCodecParserContext *av_parser_init(int codec_id);
3977

    
3978
#if LIBAVCODEC_VERSION_MAJOR < 53
3979
attribute_deprecated
3980
int av_parser_parse(AVCodecParserContext *s,
3981
                    AVCodecContext *avctx,
3982
                    uint8_t **poutbuf, int *poutbuf_size,
3983
                    const uint8_t *buf, int buf_size,
3984
                    int64_t pts, int64_t dts);
3985
#endif
3986

    
3987
/**
3988
 * Parse a packet.
3989
 *
3990
 * @param s             parser context.
3991
 * @param avctx         codec context.
3992
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
3993
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
3994
 * @param buf           input buffer.
3995
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
3996
 * @param pts           input presentation timestamp.
3997
 * @param dts           input decoding timestamp.
3998
 * @param pos           input byte position in stream.
3999
 * @return the number of bytes of the input bitstream used.
4000
 *
4001
 * Example:
4002
 * @code
4003
 *   while(in_len){
4004
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4005
 *                                        in_data, in_len,
4006
 *                                        pts, dts, pos);
4007
 *       in_data += len;
4008
 *       in_len  -= len;
4009
 *
4010
 *       if(size)
4011
 *          decode_frame(data, size);
4012
 *   }
4013
 * @endcode
4014
 */
4015
int av_parser_parse2(AVCodecParserContext *s,
4016
                     AVCodecContext *avctx,
4017
                     uint8_t **poutbuf, int *poutbuf_size,
4018
                     const uint8_t *buf, int buf_size,
4019
                     int64_t pts, int64_t dts,
4020
                     int64_t pos);
4021

    
4022
int av_parser_change(AVCodecParserContext *s,
4023
                     AVCodecContext *avctx,
4024
                     uint8_t **poutbuf, int *poutbuf_size,
4025
                     const uint8_t *buf, int buf_size, int keyframe);
4026
void av_parser_close(AVCodecParserContext *s);
4027

    
4028

    
4029
typedef struct AVBitStreamFilterContext {
4030
    void *priv_data;
4031
    struct AVBitStreamFilter *filter;
4032
    AVCodecParserContext *parser;
4033
    struct AVBitStreamFilterContext *next;
4034
} AVBitStreamFilterContext;
4035

    
4036

    
4037
typedef struct AVBitStreamFilter {
4038
    const char *name;
4039
    int priv_data_size;
4040
    int (*filter)(AVBitStreamFilterContext *bsfc,
4041
                  AVCodecContext *avctx, const char *args,
4042
                  uint8_t **poutbuf, int *poutbuf_size,
4043
                  const uint8_t *buf, int buf_size, int keyframe);
4044
    void (*close)(AVBitStreamFilterContext *bsfc);
4045
    struct AVBitStreamFilter *next;
4046
} AVBitStreamFilter;
4047

    
4048
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4049
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4050
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4051
                               AVCodecContext *avctx, const char *args,
4052
                               uint8_t **poutbuf, int *poutbuf_size,
4053
                               const uint8_t *buf, int buf_size, int keyframe);
4054
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4055

    
4056
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4057

    
4058
/* memory */
4059

    
4060
/**
4061
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4062
 *
4063
 * @see av_realloc
4064
 */
4065
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4066

    
4067
/**
4068
 * Allocate a buffer, reusing the given one if large enough.
4069
 *
4070
 * Contrary to av_fast_realloc the current buffer contents might not be
4071
 * preserved and on error the old buffer is freed, thus no special
4072
 * handling to avoid memleaks is necessary.
4073
 *
4074
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4075
 * @param size size of the buffer *ptr points to
4076
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4077
 *                 *size 0 if an error occurred.
4078
 */
4079
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4080

    
4081
#if LIBAVCODEC_VERSION_MAJOR < 53
4082
/**
4083
 * @deprecated Deprecated in favor of av_image_copy().
4084
 */
4085
attribute_deprecated
4086
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4087
                          uint8_t *src_data[4], int src_linesize[4],
4088
                          enum PixelFormat pix_fmt, int width, int height);
4089
#endif
4090

    
4091
/**
4092
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4093
 */
4094
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4095
                     enum PixelFormat pix_fmt, int width, int height);
4096

    
4097
/**
4098
 * Crop image top and left side.
4099
 */
4100
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4101
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4102

    
4103
/**
4104
 * Pad image.
4105
 */
4106
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4107
            int padtop, int padbottom, int padleft, int padright, int *color);
4108

    
4109
/**
4110
 * Encode extradata length to a buffer. Used by xiph codecs.
4111
 *
4112
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4113
 * @param v size of extradata in bytes
4114
 * @return number of bytes written to the buffer.
4115
 */
4116
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4117

    
4118
#if LIBAVCODEC_VERSION_MAJOR < 53
4119
/**
4120
 * Parse str and put in width_ptr and height_ptr the detected values.
4121
 *
4122
 * @deprecated Deprecated in favor of av_parse_video_size().
4123
 */
4124
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4125

    
4126
/**
4127
 * Parse str and store the detected values in *frame_rate.
4128
 *
4129
 * @deprecated Deprecated in favor of av_parse_video_rate().
4130
 */
4131
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4132
#endif
4133

    
4134
/**
4135
 * Logs a generic warning message about a missing feature. This function is
4136
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4137
 * only, and would normally not be used by applications.
4138
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4139
 * a pointer to an AVClass struct
4140
 * @param[in] feature string containing the name of the missing feature
4141
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4142
 * If want_sample is non-zero, additional verbage will be added to the log
4143
 * message which tells the user how to report samples to the development
4144
 * mailing list.
4145
 */
4146
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4147

    
4148
/**
4149
 * Log a generic warning message asking for a sample. This function is
4150
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4151
 * only, and would normally not be used by applications.
4152
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4153
 * a pointer to an AVClass struct
4154
 * @param[in] msg string containing an optional message, or NULL if no message
4155
 */
4156
void av_log_ask_for_sample(void *avc, const char *msg);
4157

    
4158
/**
4159
 * Register the hardware accelerator hwaccel.
4160
 */
4161
void av_register_hwaccel(AVHWAccel *hwaccel);
4162

    
4163
/**
4164
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4165
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4166
 * after hwaccel, or NULL if hwaccel is the last one.
4167
 */
4168
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4169

    
4170

    
4171
/**
4172
 * Lock operation used by lockmgr
4173
 */
4174
enum AVLockOp {
4175
  AV_LOCK_CREATE,  ///< Create a mutex
4176
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4177
  AV_LOCK_RELEASE, ///< Unlock the mutex
4178
  AV_LOCK_DESTROY, ///< Free mutex resources
4179
};
4180

    
4181
/**
4182
 * Register a user provided lock manager supporting the operations
4183
 * specified by AVLockOp. mutex points to a (void *) where the
4184
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4185
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4186
 *
4187
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4188
 *           callback during the call to av_lockmgr_register().
4189
 *           Thus, the application must be prepared to handle that.
4190
 *           If cb is set to NULL the lockmgr will be unregistered.
4191
 *           Also note that during unregistration the previously registered
4192
 *           lockmgr callback may also be invoked.
4193
 */
4194
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4195

    
4196
#endif /* AVCODEC_AVCODEC_H */