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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 "libavutil/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 113
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#define LIBAVCODEC_VERSION_MICRO  1
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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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    CODEC_ID_PRORES,
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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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    CODEC_ID_QDMC,
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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 "libavutil/audioconvert.h"
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/* Audio channel masks */
443
#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
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    to indicate that the user requests the channel order of the decoder output
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    to be the native codec channel order. */
467
#define CH_LAYOUT_NATIVE         AV_CH_LAYOUT_NATIVE
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/* Audio channel convenience macros */
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#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 */
488
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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490
/**
491
 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
492
 * This is mainly needed because some optimized bitstream readers read
493
 * 32 or 64 bit at once and could read over the end.<br>
494
 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
495
 * MPEG bitstreams could cause overread and segfault.
496
 */
497
#define FF_INPUT_BUFFER_PADDING_SIZE 8
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499
/**
500
 * minimum encoding buffer size
501
 * Used to avoid some checks during header writing.
502
 */
503
#define FF_MIN_BUFFER_SIZE 16384
504

    
505

    
506
/**
507
 * motion estimation type.
508
 */
509
enum Motion_Est_ID {
510
    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
511
    ME_FULL,
512
    ME_LOG,
513
    ME_PHODS,
514
    ME_EPZS,        ///< enhanced predictive zonal search
515
    ME_X1,          ///< reserved for experiments
516
    ME_HEX,         ///< hexagon based search
517
    ME_UMH,         ///< uneven multi-hexagon search
518
    ME_ITER,        ///< iterative search
519
    ME_TESA,        ///< transformed exhaustive search algorithm
520
};
521

    
522
enum AVDiscard{
523
    /* We leave some space between them for extensions (drop some
524
     * keyframes for intra-only or drop just some bidir frames). */
525
    AVDISCARD_NONE   =-16, ///< discard nothing
526
    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
527
    AVDISCARD_NONREF =  8, ///< discard all non reference
528
    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
529
    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
530
    AVDISCARD_ALL    = 48, ///< discard all
531
};
532

    
533
enum AVColorPrimaries{
534
    AVCOL_PRI_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
535
    AVCOL_PRI_UNSPECIFIED=2,
536
    AVCOL_PRI_BT470M     =4,
537
    AVCOL_PRI_BT470BG    =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
538
    AVCOL_PRI_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
539
    AVCOL_PRI_SMPTE240M  =7, ///< functionally identical to above
540
    AVCOL_PRI_FILM       =8,
541
    AVCOL_PRI_NB           , ///< Not part of ABI
542
};
543

    
544
enum AVColorTransferCharacteristic{
545
    AVCOL_TRC_BT709      =1, ///< also ITU-R BT1361
546
    AVCOL_TRC_UNSPECIFIED=2,
547
    AVCOL_TRC_GAMMA22    =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
548
    AVCOL_TRC_GAMMA28    =5, ///< also ITU-R BT470BG
549
    AVCOL_TRC_NB           , ///< Not part of ABI
550
};
551

    
552
enum AVColorSpace{
553
    AVCOL_SPC_RGB        =0,
554
    AVCOL_SPC_BT709      =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
555
    AVCOL_SPC_UNSPECIFIED=2,
556
    AVCOL_SPC_FCC        =4,
557
    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
558
    AVCOL_SPC_SMPTE170M  =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
559
    AVCOL_SPC_SMPTE240M  =7,
560
    AVCOL_SPC_NB           , ///< Not part of ABI
561
};
562

    
563
enum AVColorRange{
564
    AVCOL_RANGE_UNSPECIFIED=0,
565
    AVCOL_RANGE_MPEG       =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
566
    AVCOL_RANGE_JPEG       =2, ///< the normal     2^n-1   "JPEG" YUV ranges
567
    AVCOL_RANGE_NB           , ///< Not part of ABI
568
};
569

    
570
/**
571
 *  X   X      3 4 X      X are luma samples,
572
 *             1 2        1-6 are possible chroma positions
573
 *  X   X      5 6 X      0 is undefined/unknown position
574
 */
575
enum AVChromaLocation{
576
    AVCHROMA_LOC_UNSPECIFIED=0,
577
    AVCHROMA_LOC_LEFT       =1, ///< mpeg2/4, h264 default
578
    AVCHROMA_LOC_CENTER     =2, ///< mpeg1, jpeg, h263
579
    AVCHROMA_LOC_TOPLEFT    =3, ///< DV
580
    AVCHROMA_LOC_TOP        =4,
581
    AVCHROMA_LOC_BOTTOMLEFT =5,
582
    AVCHROMA_LOC_BOTTOM     =6,
583
    AVCHROMA_LOC_NB           , ///< Not part of ABI
584
};
585

    
586
/**
587
 * LPC analysis type
588
 */
589
enum AVLPCType {
590
    AV_LPC_TYPE_DEFAULT     = -1, ///< use the codec default LPC type
591
    AV_LPC_TYPE_NONE        =  0, ///< do not use LPC prediction or use all zero coefficients
592
    AV_LPC_TYPE_FIXED       =  1, ///< fixed LPC coefficients
593
    AV_LPC_TYPE_LEVINSON    =  2, ///< Levinson-Durbin recursion
594
    AV_LPC_TYPE_CHOLESKY    =  3, ///< Cholesky factorization
595
    AV_LPC_TYPE_NB              , ///< Not part of ABI
596
};
597

    
598
typedef struct RcOverride{
599
    int start_frame;
600
    int end_frame;
601
    int qscale; // If this is 0 then quality_factor will be used instead.
602
    float quality_factor;
603
} RcOverride;
604

    
605
#define FF_MAX_B_FRAMES 16
606

    
607
/* encoding support
608
   These flags can be passed in AVCodecContext.flags before initialization.
609
   Note: Not everything is supported yet.
610
*/
611

    
612
#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
613
#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
614
#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
615
#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
616
#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
617
#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
618
/**
619
 * The parent program guarantees that the input for B-frames containing
620
 * streams is not written to for at least s->max_b_frames+1 frames, if
621
 * this is not set the input will be copied.
622
 */
623
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
624
#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
625
#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
626
#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
627
#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
628
#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
629
#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
630
#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
631
                                                  location instead of only at frame boundaries. */
632
#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
633
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
634
#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
635
#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
636
#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
637
#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
638
/* Fx : Flag for h263+ extra options */
639
#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
640
#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
641
#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
642
#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
643
#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
644
#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
645
#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
646
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
647
#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
648
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
649
#define CODEC_FLAG_CLOSED_GOP     0x80000000
650
#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
651
#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
652
#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
653
#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
654
#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
655
#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
656
#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
657
#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
658
#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
659
#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
660
#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
661
#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
662
#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
663
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
664
#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
665
#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
666
#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
667
#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
668
#define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
669
#define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
670
#define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
671
#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
672

    
673
/* Unsupported options :
674
 *              Syntax Arithmetic coding (SAC)
675
 *              Reference Picture Selection
676
 *              Independent Segment Decoding */
677
/* /Fx */
678
/* codec capabilities */
679

    
680
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
681
/**
682
 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
683
 * If not set, it might not use get_buffer() at all or use operations that
684
 * assume the buffer was allocated by avcodec_default_get_buffer.
685
 */
686
#define CODEC_CAP_DR1             0x0002
687
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
688
#define CODEC_CAP_PARSE_ONLY      0x0004
689
#define CODEC_CAP_TRUNCATED       0x0008
690
/* Codec can export data for HW decoding (XvMC). */
691
#define CODEC_CAP_HWACCEL         0x0010
692
/**
693
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
694
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
695
 */
696
#define CODEC_CAP_DELAY           0x0020
697
/**
698
 * Codec can be fed a final frame with a smaller size.
699
 * This can be used to prevent truncation of the last audio samples.
700
 */
701
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
702
/**
703
 * Codec can export data for HW decoding (VDPAU).
704
 */
705
#define CODEC_CAP_HWACCEL_VDPAU    0x0080
706
/**
707
 * Codec can output multiple frames per AVPacket
708
 * Normally demuxers return one frame at a time, demuxers which do not do
709
 * are connected to a parser to split what they return into proper frames.
710
 * This flag is reserved to the very rare category of codecs which have a
711
 * bitstream that cannot be split into frames without timeconsuming
712
 * operations like full decoding. Demuxers carring such bitstreams thus
713
 * may return multiple frames in a packet. This has many disadvantages like
714
 * prohibiting stream copy in many cases thus it should only be considered
715
 * as a last resort.
716
 */
717
#define CODEC_CAP_SUBFRAMES        0x0100
718
/**
719
 * Codec is experimental and is thus avoided in favor of non experimental
720
 * encoders
721
 */
722
#define CODEC_CAP_EXPERIMENTAL     0x0200
723
/**
724
 * Codec should fill in channel configuration and samplerate instead of container
725
 */
726
#define CODEC_CAP_CHANNEL_CONF     0x0400
727
/**
728
 * Codec is able to deal with negative linesizes
729
 */
730
#define CODEC_CAP_NEG_LINESIZES    0x0800
731
/**
732
 * Codec supports frame-level multithreading.
733
 */
734
#define CODEC_CAP_FRAME_THREADS    0x1000
735

    
736
//The following defines may change, don't expect compatibility if you use them.
737
#define MB_TYPE_INTRA4x4   0x0001
738
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
739
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
740
#define MB_TYPE_16x16      0x0008
741
#define MB_TYPE_16x8       0x0010
742
#define MB_TYPE_8x16       0x0020
743
#define MB_TYPE_8x8        0x0040
744
#define MB_TYPE_INTERLACED 0x0080
745
#define MB_TYPE_DIRECT2    0x0100 //FIXME
746
#define MB_TYPE_ACPRED     0x0200
747
#define MB_TYPE_GMC        0x0400
748
#define MB_TYPE_SKIP       0x0800
749
#define MB_TYPE_P0L0       0x1000
750
#define MB_TYPE_P1L0       0x2000
751
#define MB_TYPE_P0L1       0x4000
752
#define MB_TYPE_P1L1       0x8000
753
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
754
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
755
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
756
#define MB_TYPE_QUANT      0x00010000
757
#define MB_TYPE_CBP        0x00020000
758
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
759

    
760
/**
761
 * Pan Scan area.
762
 * This specifies the area which should be displayed.
763
 * Note there may be multiple such areas for one frame.
764
 */
765
typedef struct AVPanScan{
766
    /**
767
     * id
768
     * - encoding: Set by user.
769
     * - decoding: Set by libavcodec.
770
     */
771
    int id;
772

    
773
    /**
774
     * width and height in 1/16 pel
775
     * - encoding: Set by user.
776
     * - decoding: Set by libavcodec.
777
     */
778
    int width;
779
    int height;
780

    
781
    /**
782
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
783
     * - encoding: Set by user.
784
     * - decoding: Set by libavcodec.
785
     */
786
    int16_t position[3][2];
787
}AVPanScan;
788

    
789
#define FF_COMMON_FRAME \
790
    /**\
791
     * pointer to the picture planes.\
792
     * This might be different from the first allocated byte\
793
     * - encoding: \
794
     * - decoding: \
795
     */\
796
    uint8_t *data[4];\
797
    int linesize[4];\
798
    /**\
799
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
800
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
801
     * - encoding: \
802
     * - decoding: \
803
     */\
804
    uint8_t *base[4];\
805
    /**\
806
     * 1 -> keyframe, 0-> not\
807
     * - encoding: Set by libavcodec.\
808
     * - decoding: Set by libavcodec.\
809
     */\
810
    int key_frame;\
811
\
812
    /**\
813
     * Picture type of the frame, see ?_TYPE below.\
814
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
815
     * - decoding: Set by libavcodec.\
816
     */\
817
    int pict_type;\
818
\
819
    /**\
820
     * presentation timestamp in time_base units (time when frame should be shown to user)\
821
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
822
     * - encoding: MUST be set by user.\
823
     * - decoding: Set by libavcodec.\
824
     */\
825
    int64_t pts;\
826
\
827
    /**\
828
     * picture number in bitstream order\
829
     * - encoding: set by\
830
     * - decoding: Set by libavcodec.\
831
     */\
832
    int coded_picture_number;\
833
    /**\
834
     * picture number in display order\
835
     * - encoding: set by\
836
     * - decoding: Set by libavcodec.\
837
     */\
838
    int display_picture_number;\
839
\
840
    /**\
841
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
842
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
843
     * - decoding: Set by libavcodec.\
844
     */\
845
    int quality; \
846
\
847
    /**\
848
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
849
     * Set to INT_MAX if the buffer has not been used yet.\
850
     * - encoding: unused\
851
     * - decoding: MUST be set by get_buffer().\
852
     */\
853
    int age;\
854
\
855
    /**\
856
     * is this picture used as reference\
857
     * The values for this are the same as the MpegEncContext.picture_structure\
858
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
859
     * Set to 4 for delayed, non-reference frames.\
860
     * - encoding: unused\
861
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
862
     */\
863
    int reference;\
864
\
865
    /**\
866
     * QP table\
867
     * - encoding: unused\
868
     * - decoding: Set by libavcodec.\
869
     */\
870
    int8_t *qscale_table;\
871
    /**\
872
     * QP store stride\
873
     * - encoding: unused\
874
     * - decoding: Set by libavcodec.\
875
     */\
876
    int qstride;\
877
\
878
    /**\
879
     * mbskip_table[mb]>=1 if MB didn't change\
880
     * stride= mb_width = (width+15)>>4\
881
     * - encoding: unused\
882
     * - decoding: Set by libavcodec.\
883
     */\
884
    uint8_t *mbskip_table;\
885
\
886
    /**\
887
     * motion vector table\
888
     * @code\
889
     * example:\
890
     * int mv_sample_log2= 4 - motion_subsample_log2;\
891
     * int mb_width= (width+15)>>4;\
892
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
893
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
894
     * @endcode\
895
     * - encoding: Set by user.\
896
     * - decoding: Set by libavcodec.\
897
     */\
898
    int16_t (*motion_val[2])[2];\
899
\
900
    /**\
901
     * macroblock type table\
902
     * mb_type_base + mb_width + 2\
903
     * - encoding: Set by user.\
904
     * - decoding: Set by libavcodec.\
905
     */\
906
    uint32_t *mb_type;\
907
\
908
    /**\
909
     * log2 of the size of the block which a single vector in motion_val represents: \
910
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
911
     * - encoding: unused\
912
     * - decoding: Set by libavcodec.\
913
     */\
914
    uint8_t motion_subsample_log2;\
915
\
916
    /**\
917
     * for some private data of the user\
918
     * - encoding: unused\
919
     * - decoding: Set by user.\
920
     */\
921
    void *opaque;\
922
\
923
    /**\
924
     * error\
925
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
926
     * - decoding: unused\
927
     */\
928
    uint64_t error[4];\
929
\
930
    /**\
931
     * type of the buffer (to keep track of who has to deallocate data[*])\
932
     * - encoding: Set by the one who allocates it.\
933
     * - decoding: Set by the one who allocates it.\
934
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
935
     */\
936
    int type;\
937
    \
938
    /**\
939
     * When decoding, this signals how much the picture must be delayed.\
940
     * extra_delay = repeat_pict / (2*fps)\
941
     * - encoding: unused\
942
     * - decoding: Set by libavcodec.\
943
     */\
944
    int repeat_pict;\
945
    \
946
    /**\
947
     * \
948
     */\
949
    int qscale_type;\
950
    \
951
    /**\
952
     * The content of the picture is interlaced.\
953
     * - encoding: Set by user.\
954
     * - decoding: Set by libavcodec. (default 0)\
955
     */\
956
    int interlaced_frame;\
957
    \
958
    /**\
959
     * If the content is interlaced, is top field displayed first.\
960
     * - encoding: Set by user.\
961
     * - decoding: Set by libavcodec.\
962
     */\
963
    int top_field_first;\
964
    \
965
    /**\
966
     * Pan scan.\
967
     * - encoding: Set by user.\
968
     * - decoding: Set by libavcodec.\
969
     */\
970
    AVPanScan *pan_scan;\
971
    \
972
    /**\
973
     * Tell user application that palette has changed from previous frame.\
974
     * - encoding: ??? (no palette-enabled encoder yet)\
975
     * - decoding: Set by libavcodec. (default 0).\
976
     */\
977
    int palette_has_changed;\
978
    \
979
    /**\
980
     * codec suggestion on buffer type if != 0\
981
     * - encoding: unused\
982
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
983
     */\
984
    int buffer_hints;\
985
\
986
    /**\
987
     * DCT coefficients\
988
     * - encoding: unused\
989
     * - decoding: Set by libavcodec.\
990
     */\
991
    short *dct_coeff;\
992
\
993
    /**\
994
     * motion reference frame index\
995
     * the order in which these are stored can depend on the codec.\
996
     * - encoding: Set by user.\
997
     * - decoding: Set by libavcodec.\
998
     */\
999
    int8_t *ref_index[2];\
1000
\
1001
    /**\
1002
     * reordered opaque 64bit (generally an integer or a double precision float\
1003
     * PTS but can be anything). \
1004
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
1005
     * that time,\
1006
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
1007
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
1008
     * @deprecated in favor of pkt_pts\
1009
     * - encoding: unused\
1010
     * - decoding: Read by user.\
1011
     */\
1012
    int64_t reordered_opaque;\
1013
\
1014
    /**\
1015
     * hardware accelerator private data (FFmpeg allocated)\
1016
     * - encoding: unused\
1017
     * - decoding: Set by libavcodec\
1018
     */\
1019
    void *hwaccel_picture_private;\
1020
\
1021
    /**\
1022
     * reordered pts from the last AVPacket that has been input into the decoder\
1023
     * - encoding: unused\
1024
     * - decoding: Read by user.\
1025
     */\
1026
    int64_t pkt_pts;\
1027
\
1028
    /**\
1029
     * dts from the last AVPacket that has been input into the decoder\
1030
     * - encoding: unused\
1031
     * - decoding: Read by user.\
1032
     */\
1033
    int64_t pkt_dts;\
1034
\
1035
    /**\
1036
     * the AVCodecContext which ff_thread_get_buffer() was last called on\
1037
     * - encoding: Set by libavcodec.\
1038
     * - decoding: Set by libavcodec.\
1039
     */\
1040
    struct AVCodecContext *owner;\
1041
\
1042
    /**\
1043
     * used by multithreading to store frame-specific info\
1044
     * - encoding: Set by libavcodec.\
1045
     * - decoding: Set by libavcodec.\
1046
     */\
1047
    void *thread_opaque;\
1048

    
1049
#define FF_QSCALE_TYPE_MPEG1 0
1050
#define FF_QSCALE_TYPE_MPEG2 1
1051
#define FF_QSCALE_TYPE_H264  2
1052
#define FF_QSCALE_TYPE_VP56  3
1053

    
1054
#define FF_BUFFER_TYPE_INTERNAL 1
1055
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1056
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1057
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1058

    
1059

    
1060
#define FF_I_TYPE  1 ///< Intra
1061
#define FF_P_TYPE  2 ///< Predicted
1062
#define FF_B_TYPE  3 ///< Bi-dir predicted
1063
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1064
#define FF_SI_TYPE 5 ///< Switching Intra
1065
#define FF_SP_TYPE 6 ///< Switching Predicted
1066
#define FF_BI_TYPE 7
1067

    
1068
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1069
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1070
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1071
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1072

    
1073
typedef struct AVPacket {
1074
    /**
1075
     * Presentation timestamp in AVStream->time_base units; the time at which
1076
     * the decompressed packet will be presented to the user.
1077
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1078
     * pts MUST be larger or equal to dts as presentation cannot happen before
1079
     * decompression, unless one wants to view hex dumps. Some formats misuse
1080
     * the terms dts and pts/cts to mean something different. Such timestamps
1081
     * must be converted to true pts/dts before they are stored in AVPacket.
1082
     */
1083
    int64_t pts;
1084
    /**
1085
     * Decompression timestamp in AVStream->time_base units; the time at which
1086
     * the packet is decompressed.
1087
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1088
     */
1089
    int64_t dts;
1090
    uint8_t *data;
1091
    int   size;
1092
    int   stream_index;
1093
    int   flags;
1094
    /**
1095
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1096
     * Equals next_pts - this_pts in presentation order.
1097
     */
1098
    int   duration;
1099
    void  (*destruct)(struct AVPacket *);
1100
    void  *priv;
1101
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1102

    
1103
    /**
1104
     * Time difference in AVStream->time_base units from the pts of this
1105
     * packet to the point at which the output from the decoder has converged
1106
     * independent from the availability of previous frames. That is, the
1107
     * frames are virtually identical no matter if decoding started from
1108
     * the very first frame or from this keyframe.
1109
     * Is AV_NOPTS_VALUE if unknown.
1110
     * This field is not the display duration of the current packet.
1111
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1112
     * set.
1113
     *
1114
     * The purpose of this field is to allow seeking in streams that have no
1115
     * keyframes in the conventional sense. It corresponds to the
1116
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1117
     * essential for some types of subtitle streams to ensure that all
1118
     * subtitles are correctly displayed after seeking.
1119
     */
1120
    int64_t convergence_duration;
1121
} AVPacket;
1122
#define AV_PKT_FLAG_KEY   0x0001
1123
#if LIBAVCODEC_VERSION_MAJOR < 53
1124
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1125
#endif
1126

    
1127
/**
1128
 * Audio Video Frame.
1129
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1130
 * bumps.
1131
 * Removal, reordering and changes to existing fields require a major
1132
 * version bump. No fields should be added into AVFrame before or after
1133
 * FF_COMMON_FRAME!
1134
 * sizeof(AVFrame) must not be used outside libav*.
1135
 */
1136
typedef struct AVFrame {
1137
    FF_COMMON_FRAME
1138
} AVFrame;
1139

    
1140
/**
1141
 * main external API structure.
1142
 * New fields can be added to the end with minor version bumps.
1143
 * Removal, reordering and changes to existing fields require a major
1144
 * version bump.
1145
 * sizeof(AVCodecContext) must not be used outside libav*.
1146
 */
1147
typedef struct AVCodecContext {
1148
    /**
1149
     * information on struct for av_log
1150
     * - set by avcodec_alloc_context
1151
     */
1152
    const AVClass *av_class;
1153
    /**
1154
     * the average bitrate
1155
     * - encoding: Set by user; unused for constant quantizer encoding.
1156
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1157
     */
1158
    int bit_rate;
1159

    
1160
    /**
1161
     * number of bits the bitstream is allowed to diverge from the reference.
1162
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1163
     * - encoding: Set by user; unused for constant quantizer encoding.
1164
     * - decoding: unused
1165
     */
1166
    int bit_rate_tolerance;
1167

    
1168
    /**
1169
     * CODEC_FLAG_*.
1170
     * - encoding: Set by user.
1171
     * - decoding: Set by user.
1172
     */
1173
    int flags;
1174

    
1175
    /**
1176
     * Some codecs need additional format info. It is stored here.
1177
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1178
     * specific codec MUST set it correctly otherwise stream copy breaks.
1179
     * In general use of this field by muxers is not recommanded.
1180
     * - encoding: Set by libavcodec.
1181
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1182
     */
1183
    int sub_id;
1184

    
1185
    /**
1186
     * Motion estimation algorithm used for video coding.
1187
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1188
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1189
     * - encoding: MUST be set by user.
1190
     * - decoding: unused
1191
     */
1192
    int me_method;
1193

    
1194
    /**
1195
     * some codecs need / can use extradata like Huffman tables.
1196
     * mjpeg: Huffman tables
1197
     * rv10: additional flags
1198
     * mpeg4: global headers (they can be in the bitstream or here)
1199
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1200
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1201
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1202
     * - encoding: Set/allocated/freed by libavcodec.
1203
     * - decoding: Set/allocated/freed by user.
1204
     */
1205
    uint8_t *extradata;
1206
    int extradata_size;
1207

    
1208
    /**
1209
     * This is the fundamental unit of time (in seconds) in terms
1210
     * of which frame timestamps are represented. For fixed-fps content,
1211
     * timebase should be 1/framerate and timestamp increments should be
1212
     * identically 1.
1213
     * - encoding: MUST be set by user.
1214
     * - decoding: Set by libavcodec.
1215
     */
1216
    AVRational time_base;
1217

    
1218
    /* video only */
1219
    /**
1220
     * picture width / height.
1221
     * - encoding: MUST be set by user.
1222
     * - decoding: Set by libavcodec.
1223
     * Note: For compatibility it is possible to set this instead of
1224
     * coded_width/height before decoding.
1225
     */
1226
    int width, height;
1227

    
1228
#define FF_ASPECT_EXTENDED 15
1229

    
1230
    /**
1231
     * the number of pictures in a group of pictures, or 0 for intra_only
1232
     * - encoding: Set by user.
1233
     * - decoding: unused
1234
     */
1235
    int gop_size;
1236

    
1237
    /**
1238
     * Pixel format, see PIX_FMT_xxx.
1239
     * May be set by the demuxer if known from headers.
1240
     * May be overriden by the decoder if it knows better.
1241
     * - encoding: Set by user.
1242
     * - decoding: Set by user if known, overridden by libavcodec if known
1243
     */
1244
    enum PixelFormat pix_fmt;
1245

    
1246
    /**
1247
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1248
     * has to read frames at native frame rate.
1249
     * - encoding: Set by user.
1250
     * - decoding: unused
1251
     */
1252
    int rate_emu;
1253

    
1254
    /**
1255
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1256
     * decoder to draw a horizontal band. It improves cache usage. Not
1257
     * all codecs can do that. You must check the codec capabilities
1258
     * beforehand.
1259
     * When multithreading is used, it may be called from multiple threads
1260
     * at the same time; threads might draw different parts of the same AVFrame,
1261
     * or multiple AVFrames, and there is no guarantee that slices will be drawn
1262
     * in order.
1263
     * The function is also used by hardware acceleration APIs.
1264
     * It is called at least once during frame decoding to pass
1265
     * the data needed for hardware render.
1266
     * In that mode instead of pixel data, AVFrame points to
1267
     * a structure specific to the acceleration API. The application
1268
     * reads the structure and can change some fields to indicate progress
1269
     * or mark state.
1270
     * - encoding: unused
1271
     * - decoding: Set by user.
1272
     * @param height the height of the slice
1273
     * @param y the y position of the slice
1274
     * @param type 1->top field, 2->bottom field, 3->frame
1275
     * @param offset offset into the AVFrame.data from which the slice should be read
1276
     */
1277
    void (*draw_horiz_band)(struct AVCodecContext *s,
1278
                            const AVFrame *src, int offset[4],
1279
                            int y, int type, int height);
1280

    
1281
    /* audio only */
1282
    int sample_rate; ///< samples per second
1283
    int channels;    ///< number of audio channels
1284

    
1285
    /**
1286
     * audio sample format
1287
     * - encoding: Set by user.
1288
     * - decoding: Set by libavcodec.
1289
     */
1290
    enum AVSampleFormat sample_fmt;  ///< sample format
1291

    
1292
    /* The following data should not be initialized. */
1293
    /**
1294
     * Samples per packet, initialized when calling 'init'.
1295
     */
1296
    int frame_size;
1297
    int frame_number;   ///< audio or video frame number
1298
#if LIBAVCODEC_VERSION_MAJOR < 53
1299
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1300
#endif
1301

    
1302
    /**
1303
     * Number of frames the decoded output will be delayed relative to
1304
     * the encoded input.
1305
     * - encoding: Set by libavcodec.
1306
     * - decoding: unused
1307
     */
1308
    int delay;
1309

    
1310
    /* - encoding parameters */
1311
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1312
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1313

    
1314
    /**
1315
     * minimum quantizer
1316
     * - encoding: Set by user.
1317
     * - decoding: unused
1318
     */
1319
    int qmin;
1320

    
1321
    /**
1322
     * maximum quantizer
1323
     * - encoding: Set by user.
1324
     * - decoding: unused
1325
     */
1326
    int qmax;
1327

    
1328
    /**
1329
     * maximum quantizer difference between frames
1330
     * - encoding: Set by user.
1331
     * - decoding: unused
1332
     */
1333
    int max_qdiff;
1334

    
1335
    /**
1336
     * maximum number of B-frames between non-B-frames
1337
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1338
     * - encoding: Set by user.
1339
     * - decoding: unused
1340
     */
1341
    int max_b_frames;
1342

    
1343
    /**
1344
     * qscale factor between IP and B-frames
1345
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1346
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1347
     * - encoding: Set by user.
1348
     * - decoding: unused
1349
     */
1350
    float b_quant_factor;
1351

    
1352
    /** obsolete FIXME remove */
1353
    int rc_strategy;
1354
#define FF_RC_STRATEGY_XVID 1
1355

    
1356
    int b_frame_strategy;
1357

    
1358
    /**
1359
     * hurry up amount
1360
     * - encoding: unused
1361
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1362
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1363
     */
1364
    int hurry_up;
1365

    
1366
    struct AVCodec *codec;
1367

    
1368
    void *priv_data;
1369

    
1370
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1371
                            /* do its best to deliver a chunk with size     */
1372
                            /* below rtp_payload_size, the chunk will start */
1373
                            /* with a start code on some codecs like H.263. */
1374
                            /* This doesn't take account of any particular  */
1375
                            /* headers inside the transmitted RTP payload.  */
1376

    
1377

    
1378
    /* The RTP callback: This function is called    */
1379
    /* every time the encoder has a packet to send. */
1380
    /* It depends on the encoder if the data starts */
1381
    /* with a Start Code (it should). H.263 does.   */
1382
    /* mb_nb contains the number of macroblocks     */
1383
    /* encoded in the RTP payload.                  */
1384
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1385

    
1386
    /* statistics, used for 2-pass encoding */
1387
    int mv_bits;
1388
    int header_bits;
1389
    int i_tex_bits;
1390
    int p_tex_bits;
1391
    int i_count;
1392
    int p_count;
1393
    int skip_count;
1394
    int misc_bits;
1395

    
1396
    /**
1397
     * number of bits used for the previously encoded frame
1398
     * - encoding: Set by libavcodec.
1399
     * - decoding: unused
1400
     */
1401
    int frame_bits;
1402

    
1403
    /**
1404
     * Private data of the user, can be used to carry app specific stuff.
1405
     * - encoding: Set by user.
1406
     * - decoding: Set by user.
1407
     */
1408
    void *opaque;
1409

    
1410
    char codec_name[32];
1411
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1412
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1413

    
1414
    /**
1415
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1416
     * This is used to work around some encoder bugs.
1417
     * A demuxer should set this to what is stored in the field used to identify the codec.
1418
     * If there are multiple such fields in a container then the demuxer should choose the one
1419
     * which maximizes the information about the used codec.
1420
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1421
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1422
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1423
     * first.
1424
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1425
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1426
     */
1427
    unsigned int codec_tag;
1428

    
1429
    /**
1430
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1431
     * - encoding: Set by user
1432
     * - decoding: Set by user
1433
     */
1434
    int workaround_bugs;
1435
#define FF_BUG_AUTODETECT       1  ///< autodetection
1436
#define FF_BUG_OLD_MSMPEG4      2
1437
#define FF_BUG_XVID_ILACE       4
1438
#define FF_BUG_UMP4             8
1439
#define FF_BUG_NO_PADDING       16
1440
#define FF_BUG_AMV              32
1441
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1442
#define FF_BUG_QPEL_CHROMA      64
1443
#define FF_BUG_STD_QPEL         128
1444
#define FF_BUG_QPEL_CHROMA2     256
1445
#define FF_BUG_DIRECT_BLOCKSIZE 512
1446
#define FF_BUG_EDGE             1024
1447
#define FF_BUG_HPEL_CHROMA      2048
1448
#define FF_BUG_DC_CLIP          4096
1449
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1450
#define FF_BUG_TRUNCATED       16384
1451
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1452

    
1453
    /**
1454
     * luma single coefficient elimination threshold
1455
     * - encoding: Set by user.
1456
     * - decoding: unused
1457
     */
1458
    int luma_elim_threshold;
1459

    
1460
    /**
1461
     * chroma single coeff elimination threshold
1462
     * - encoding: Set by user.
1463
     * - decoding: unused
1464
     */
1465
    int chroma_elim_threshold;
1466

    
1467
    /**
1468
     * strictly follow the standard (MPEG4, ...).
1469
     * - encoding: Set by user.
1470
     * - decoding: Set by user.
1471
     * Setting this to STRICT or higher means the encoder and decoder will
1472
     * generally do stupid things, whereas setting it to unofficial or lower
1473
     * will mean the encoder might produce output that is not supported by all
1474
     * spec-compliant decoders. Decoders don't differentiate between normal,
1475
     * unofficial and experimental (that is, they always try to decode things
1476
     * when they can) unless they are explicitly asked to behave stupidly
1477
     * (=strictly conform to the specs)
1478
     */
1479
    int strict_std_compliance;
1480
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1481
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1482
#define FF_COMPLIANCE_NORMAL        0
1483
#if FF_API_INOFFICIAL
1484
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1485
#endif
1486
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1487
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1488

    
1489
    /**
1490
     * qscale offset between IP and B-frames
1491
     * - encoding: Set by user.
1492
     * - decoding: unused
1493
     */
1494
    float b_quant_offset;
1495

    
1496
    /**
1497
     * Error recognization; higher values will detect more errors but may
1498
     * misdetect some more or less valid parts as errors.
1499
     * - encoding: unused
1500
     * - decoding: Set by user.
1501
     */
1502
    int error_recognition;
1503
#define FF_ER_CAREFUL         1
1504
#define FF_ER_COMPLIANT       2
1505
#define FF_ER_AGGRESSIVE      3
1506
#define FF_ER_VERY_AGGRESSIVE 4
1507

    
1508
    /**
1509
     * Called at the beginning of each frame to get a buffer for it.
1510
     * If pic.reference is set then the frame will be read later by libavcodec.
1511
     * avcodec_align_dimensions2() should be used to find the required width and
1512
     * height, as they normally need to be rounded up to the next multiple of 16.
1513
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1514
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1515
     * some other means.
1516
     * If frame multithreading is used and thread_safe_callbacks is set,
1517
     * it may be called from a different thread, but not from more than one at once.
1518
     * Does not need to be reentrant.
1519
     * - encoding: unused
1520
     * - decoding: Set by libavcodec, user can override.
1521
     */
1522
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1523

    
1524
    /**
1525
     * Called to release buffers which were allocated with get_buffer.
1526
     * A released buffer can be reused in get_buffer().
1527
     * pic.data[*] must be set to NULL.
1528
     * May be called from a different thread if frame multithreading is used,
1529
     * but not by more than one thread at once, so does not need to be reentrant.
1530
     * - encoding: unused
1531
     * - decoding: Set by libavcodec, user can override.
1532
     */
1533
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1534

    
1535
    /**
1536
     * Size of the frame reordering buffer in the decoder.
1537
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1538
     * - encoding: Set by libavcodec.
1539
     * - decoding: Set by libavcodec.
1540
     */
1541
    int has_b_frames;
1542

    
1543
    /**
1544
     * number of bytes per packet if constant and known or 0
1545
     * Used by some WAV based audio codecs.
1546
     */
1547
    int block_align;
1548

    
1549
    int parse_only; /* - decoding only: If true, only parsing is done
1550
                       (function avcodec_parse_frame()). The frame
1551
                       data is returned. Only MPEG codecs support this now. */
1552

    
1553
    /**
1554
     * 0-> h263 quant 1-> mpeg quant
1555
     * - encoding: Set by user.
1556
     * - decoding: unused
1557
     */
1558
    int mpeg_quant;
1559

    
1560
    /**
1561
     * pass1 encoding statistics output buffer
1562
     * - encoding: Set by libavcodec.
1563
     * - decoding: unused
1564
     */
1565
    char *stats_out;
1566

    
1567
    /**
1568
     * pass2 encoding statistics input buffer
1569
     * Concatenated stuff from stats_out of pass1 should be placed here.
1570
     * - encoding: Allocated/set/freed by user.
1571
     * - decoding: unused
1572
     */
1573
    char *stats_in;
1574

    
1575
    /**
1576
     * ratecontrol qmin qmax limiting method
1577
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1578
     * - encoding: Set by user.
1579
     * - decoding: unused
1580
     */
1581
    float rc_qsquish;
1582

    
1583
    float rc_qmod_amp;
1584
    int rc_qmod_freq;
1585

    
1586
    /**
1587
     * ratecontrol override, see RcOverride
1588
     * - encoding: Allocated/set/freed by user.
1589
     * - decoding: unused
1590
     */
1591
    RcOverride *rc_override;
1592
    int rc_override_count;
1593

    
1594
    /**
1595
     * rate control equation
1596
     * - encoding: Set by user
1597
     * - decoding: unused
1598
     */
1599
    const char *rc_eq;
1600

    
1601
    /**
1602
     * maximum bitrate
1603
     * - encoding: Set by user.
1604
     * - decoding: unused
1605
     */
1606
    int rc_max_rate;
1607

    
1608
    /**
1609
     * minimum bitrate
1610
     * - encoding: Set by user.
1611
     * - decoding: unused
1612
     */
1613
    int rc_min_rate;
1614

    
1615
    /**
1616
     * decoder bitstream buffer size
1617
     * - encoding: Set by user.
1618
     * - decoding: unused
1619
     */
1620
    int rc_buffer_size;
1621
    float rc_buffer_aggressivity;
1622

    
1623
    /**
1624
     * qscale factor between P and I-frames
1625
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1626
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1627
     * - encoding: Set by user.
1628
     * - decoding: unused
1629
     */
1630
    float i_quant_factor;
1631

    
1632
    /**
1633
     * qscale offset between P and I-frames
1634
     * - encoding: Set by user.
1635
     * - decoding: unused
1636
     */
1637
    float i_quant_offset;
1638

    
1639
    /**
1640
     * initial complexity for pass1 ratecontrol
1641
     * - encoding: Set by user.
1642
     * - decoding: unused
1643
     */
1644
    float rc_initial_cplx;
1645

    
1646
    /**
1647
     * DCT algorithm, see FF_DCT_* below
1648
     * - encoding: Set by user.
1649
     * - decoding: unused
1650
     */
1651
    int dct_algo;
1652
#define FF_DCT_AUTO    0
1653
#define FF_DCT_FASTINT 1
1654
#define FF_DCT_INT     2
1655
#define FF_DCT_MMX     3
1656
#define FF_DCT_MLIB    4
1657
#define FF_DCT_ALTIVEC 5
1658
#define FF_DCT_FAAN    6
1659

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

    
1667
    /**
1668
     * temporary complexity masking (0-> disabled)
1669
     * - encoding: Set by user.
1670
     * - decoding: unused
1671
     */
1672
    float temporal_cplx_masking;
1673

    
1674
    /**
1675
     * spatial complexity masking (0-> disabled)
1676
     * - encoding: Set by user.
1677
     * - decoding: unused
1678
     */
1679
    float spatial_cplx_masking;
1680

    
1681
    /**
1682
     * p block masking (0-> disabled)
1683
     * - encoding: Set by user.
1684
     * - decoding: unused
1685
     */
1686
    float p_masking;
1687

    
1688
    /**
1689
     * darkness masking (0-> disabled)
1690
     * - encoding: Set by user.
1691
     * - decoding: unused
1692
     */
1693
    float dark_masking;
1694

    
1695
    /**
1696
     * IDCT algorithm, see FF_IDCT_* below.
1697
     * - encoding: Set by user.
1698
     * - decoding: Set by user.
1699
     */
1700
    int idct_algo;
1701
#define FF_IDCT_AUTO          0
1702
#define FF_IDCT_INT           1
1703
#define FF_IDCT_SIMPLE        2
1704
#define FF_IDCT_SIMPLEMMX     3
1705
#define FF_IDCT_LIBMPEG2MMX   4
1706
#define FF_IDCT_PS2           5
1707
#define FF_IDCT_MLIB          6
1708
#define FF_IDCT_ARM           7
1709
#define FF_IDCT_ALTIVEC       8
1710
#define FF_IDCT_SH4           9
1711
#define FF_IDCT_SIMPLEARM     10
1712
#define FF_IDCT_H264          11
1713
#define FF_IDCT_VP3           12
1714
#define FF_IDCT_IPP           13
1715
#define FF_IDCT_XVIDMMX       14
1716
#define FF_IDCT_CAVS          15
1717
#define FF_IDCT_SIMPLEARMV5TE 16
1718
#define FF_IDCT_SIMPLEARMV6   17
1719
#define FF_IDCT_SIMPLEVIS     18
1720
#define FF_IDCT_WMV2          19
1721
#define FF_IDCT_FAAN          20
1722
#define FF_IDCT_EA            21
1723
#define FF_IDCT_SIMPLENEON    22
1724
#define FF_IDCT_SIMPLEALPHA   23
1725
#define FF_IDCT_BINK          24
1726

    
1727
    /**
1728
     * slice count
1729
     * - encoding: Set by libavcodec.
1730
     * - decoding: Set by user (or 0).
1731
     */
1732
    int slice_count;
1733
    /**
1734
     * slice offsets in the frame in bytes
1735
     * - encoding: Set/allocated by libavcodec.
1736
     * - decoding: Set/allocated by user (or NULL).
1737
     */
1738
    int *slice_offset;
1739

    
1740
    /**
1741
     * error concealment flags
1742
     * - encoding: unused
1743
     * - decoding: Set by user.
1744
     */
1745
    int error_concealment;
1746
#define FF_EC_GUESS_MVS   1
1747
#define FF_EC_DEBLOCK     2
1748

    
1749
    /**
1750
     * dsp_mask could be add used to disable unwanted CPU features
1751
     * CPU features (i.e. MMX, SSE. ...)
1752
     *
1753
     * With the FORCE flag you may instead enable given CPU features.
1754
     * (Dangerous: Usable in case of misdetection, improper usage however will
1755
     * result into program crash.)
1756
     */
1757
    unsigned dsp_mask;
1758

    
1759
#if FF_API_MM_FLAGS
1760
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1761
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1762
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1763
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1764
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1765
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1766
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1767
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1768
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1769
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1770
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1771
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1772
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1773
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1774
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1775
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1776
#endif
1777

    
1778
    /**
1779
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1780
     * - encoding: Set by libavcodec.
1781
     * - decoding: Set by user.
1782
     */
1783
     int bits_per_coded_sample;
1784

    
1785
    /**
1786
     * prediction method (needed for huffyuv)
1787
     * - encoding: Set by user.
1788
     * - decoding: unused
1789
     */
1790
     int prediction_method;
1791
#define FF_PRED_LEFT   0
1792
#define FF_PRED_PLANE  1
1793
#define FF_PRED_MEDIAN 2
1794

    
1795
    /**
1796
     * sample aspect ratio (0 if unknown)
1797
     * That is the width of a pixel divided by the height of the pixel.
1798
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1799
     * - encoding: Set by user.
1800
     * - decoding: Set by libavcodec.
1801
     */
1802
    AVRational sample_aspect_ratio;
1803

    
1804
    /**
1805
     * the picture in the bitstream
1806
     * - encoding: Set by libavcodec.
1807
     * - decoding: Set by libavcodec.
1808
     */
1809
    AVFrame *coded_frame;
1810

    
1811
    /**
1812
     * debug
1813
     * - encoding: Set by user.
1814
     * - decoding: Set by user.
1815
     */
1816
    int debug;
1817
#define FF_DEBUG_PICT_INFO   1
1818
#define FF_DEBUG_RC          2
1819
#define FF_DEBUG_BITSTREAM   4
1820
#define FF_DEBUG_MB_TYPE     8
1821
#define FF_DEBUG_QP          16
1822
#define FF_DEBUG_MV          32
1823
#define FF_DEBUG_DCT_COEFF   0x00000040
1824
#define FF_DEBUG_SKIP        0x00000080
1825
#define FF_DEBUG_STARTCODE   0x00000100
1826
#define FF_DEBUG_PTS         0x00000200
1827
#define FF_DEBUG_ER          0x00000400
1828
#define FF_DEBUG_MMCO        0x00000800
1829
#define FF_DEBUG_BUGS        0x00001000
1830
#define FF_DEBUG_VIS_QP      0x00002000
1831
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1832
#define FF_DEBUG_BUFFERS     0x00008000
1833
#define FF_DEBUG_THREADS     0x00010000
1834

    
1835
    /**
1836
     * debug
1837
     * - encoding: Set by user.
1838
     * - decoding: Set by user.
1839
     */
1840
    int debug_mv;
1841
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1842
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1843
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1844

    
1845
    /**
1846
     * error
1847
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1848
     * - decoding: unused
1849
     */
1850
    uint64_t error[4];
1851

    
1852
    /**
1853
     * minimum MB quantizer
1854
     * - encoding: unused
1855
     * - decoding: unused
1856
     */
1857
    int mb_qmin;
1858

    
1859
    /**
1860
     * maximum MB quantizer
1861
     * - encoding: unused
1862
     * - decoding: unused
1863
     */
1864
    int mb_qmax;
1865

    
1866
    /**
1867
     * motion estimation comparison function
1868
     * - encoding: Set by user.
1869
     * - decoding: unused
1870
     */
1871
    int me_cmp;
1872
    /**
1873
     * subpixel motion estimation comparison function
1874
     * - encoding: Set by user.
1875
     * - decoding: unused
1876
     */
1877
    int me_sub_cmp;
1878
    /**
1879
     * macroblock comparison function (not supported yet)
1880
     * - encoding: Set by user.
1881
     * - decoding: unused
1882
     */
1883
    int mb_cmp;
1884
    /**
1885
     * interlaced DCT comparison function
1886
     * - encoding: Set by user.
1887
     * - decoding: unused
1888
     */
1889
    int ildct_cmp;
1890
#define FF_CMP_SAD    0
1891
#define FF_CMP_SSE    1
1892
#define FF_CMP_SATD   2
1893
#define FF_CMP_DCT    3
1894
#define FF_CMP_PSNR   4
1895
#define FF_CMP_BIT    5
1896
#define FF_CMP_RD     6
1897
#define FF_CMP_ZERO   7
1898
#define FF_CMP_VSAD   8
1899
#define FF_CMP_VSSE   9
1900
#define FF_CMP_NSSE   10
1901
#define FF_CMP_W53    11
1902
#define FF_CMP_W97    12
1903
#define FF_CMP_DCTMAX 13
1904
#define FF_CMP_DCT264 14
1905
#define FF_CMP_CHROMA 256
1906

    
1907
    /**
1908
     * ME diamond size & shape
1909
     * - encoding: Set by user.
1910
     * - decoding: unused
1911
     */
1912
    int dia_size;
1913

    
1914
    /**
1915
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1916
     * - encoding: Set by user.
1917
     * - decoding: unused
1918
     */
1919
    int last_predictor_count;
1920

    
1921
    /**
1922
     * prepass for motion estimation
1923
     * - encoding: Set by user.
1924
     * - decoding: unused
1925
     */
1926
    int pre_me;
1927

    
1928
    /**
1929
     * motion estimation prepass comparison function
1930
     * - encoding: Set by user.
1931
     * - decoding: unused
1932
     */
1933
    int me_pre_cmp;
1934

    
1935
    /**
1936
     * ME prepass diamond size & shape
1937
     * - encoding: Set by user.
1938
     * - decoding: unused
1939
     */
1940
    int pre_dia_size;
1941

    
1942
    /**
1943
     * subpel ME quality
1944
     * - encoding: Set by user.
1945
     * - decoding: unused
1946
     */
1947
    int me_subpel_quality;
1948

    
1949
    /**
1950
     * callback to negotiate the pixelFormat
1951
     * @param fmt is the list of formats which are supported by the codec,
1952
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1953
     * The first is always the native one.
1954
     * @return the chosen format
1955
     * - encoding: unused
1956
     * - decoding: Set by user, if not set the native format will be chosen.
1957
     */
1958
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1959

    
1960
    /**
1961
     * DTG active format information (additional aspect ratio
1962
     * information only used in DVB MPEG-2 transport streams)
1963
     * 0 if not set.
1964
     *
1965
     * - encoding: unused
1966
     * - decoding: Set by decoder.
1967
     */
1968
    int dtg_active_format;
1969
#define FF_DTG_AFD_SAME         8
1970
#define FF_DTG_AFD_4_3          9
1971
#define FF_DTG_AFD_16_9         10
1972
#define FF_DTG_AFD_14_9         11
1973
#define FF_DTG_AFD_4_3_SP_14_9  13
1974
#define FF_DTG_AFD_16_9_SP_14_9 14
1975
#define FF_DTG_AFD_SP_4_3       15
1976

    
1977
    /**
1978
     * maximum motion estimation search range in subpel units
1979
     * If 0 then no limit.
1980
     *
1981
     * - encoding: Set by user.
1982
     * - decoding: unused
1983
     */
1984
    int me_range;
1985

    
1986
    /**
1987
     * intra quantizer bias
1988
     * - encoding: Set by user.
1989
     * - decoding: unused
1990
     */
1991
    int intra_quant_bias;
1992
#define FF_DEFAULT_QUANT_BIAS 999999
1993

    
1994
    /**
1995
     * inter quantizer bias
1996
     * - encoding: Set by user.
1997
     * - decoding: unused
1998
     */
1999
    int inter_quant_bias;
2000

    
2001
    /**
2002
     * color table ID
2003
     * - encoding: unused
2004
     * - decoding: Which clrtable should be used for 8bit RGB images.
2005
     *             Tables have to be stored somewhere. FIXME
2006
     */
2007
    int color_table_id;
2008

    
2009
    /**
2010
     * internal_buffer count
2011
     * Don't touch, used by libavcodec default_get_buffer().
2012
     */
2013
    int internal_buffer_count;
2014

    
2015
    /**
2016
     * internal_buffers
2017
     * Don't touch, used by libavcodec default_get_buffer().
2018
     */
2019
    void *internal_buffer;
2020

    
2021
    /**
2022
     * Global quality for codecs which cannot change it per frame.
2023
     * This should be proportional to MPEG-1/2/4 qscale.
2024
     * - encoding: Set by user.
2025
     * - decoding: unused
2026
     */
2027
    int global_quality;
2028

    
2029
#define FF_CODER_TYPE_VLC       0
2030
#define FF_CODER_TYPE_AC        1
2031
#define FF_CODER_TYPE_RAW       2
2032
#define FF_CODER_TYPE_RLE       3
2033
#define FF_CODER_TYPE_DEFLATE   4
2034
    /**
2035
     * coder type
2036
     * - encoding: Set by user.
2037
     * - decoding: unused
2038
     */
2039
    int coder_type;
2040

    
2041
    /**
2042
     * context model
2043
     * - encoding: Set by user.
2044
     * - decoding: unused
2045
     */
2046
    int context_model;
2047
#if 0
2048
    /**
2049
     *
2050
     * - encoding: unused
2051
     * - decoding: Set by user.
2052
     */
2053
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2054
#endif
2055

    
2056
    /**
2057
     * slice flags
2058
     * - encoding: unused
2059
     * - decoding: Set by user.
2060
     */
2061
    int slice_flags;
2062
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2063
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2064
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2065

    
2066
    /**
2067
     * XVideo Motion Acceleration
2068
     * - encoding: forbidden
2069
     * - decoding: set by decoder
2070
     */
2071
    int xvmc_acceleration;
2072

    
2073
    /**
2074
     * macroblock decision mode
2075
     * - encoding: Set by user.
2076
     * - decoding: unused
2077
     */
2078
    int mb_decision;
2079
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2080
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2081
#define FF_MB_DECISION_RD     2        ///< rate distortion
2082

    
2083
    /**
2084
     * custom intra quantization matrix
2085
     * - encoding: Set by user, can be NULL.
2086
     * - decoding: Set by libavcodec.
2087
     */
2088
    uint16_t *intra_matrix;
2089

    
2090
    /**
2091
     * custom inter quantization matrix
2092
     * - encoding: Set by user, can be NULL.
2093
     * - decoding: Set by libavcodec.
2094
     */
2095
    uint16_t *inter_matrix;
2096

    
2097
    /**
2098
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2099
     * This is used to work around some encoder bugs.
2100
     * - encoding: unused
2101
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2102
     */
2103
    unsigned int stream_codec_tag;
2104

    
2105
    /**
2106
     * scene change detection threshold
2107
     * 0 is default, larger means fewer detected scene changes.
2108
     * - encoding: Set by user.
2109
     * - decoding: unused
2110
     */
2111
    int scenechange_threshold;
2112

    
2113
    /**
2114
     * minimum Lagrange multipler
2115
     * - encoding: Set by user.
2116
     * - decoding: unused
2117
     */
2118
    int lmin;
2119

    
2120
    /**
2121
     * maximum Lagrange multipler
2122
     * - encoding: Set by user.
2123
     * - decoding: unused
2124
     */
2125
    int lmax;
2126

    
2127
#if FF_API_PALETTE_CONTROL
2128
    /**
2129
     * palette control structure
2130
     * - encoding: ??? (no palette-enabled encoder yet)
2131
     * - decoding: Set by user.
2132
     */
2133
    struct AVPaletteControl *palctrl;
2134
#endif
2135

    
2136
    /**
2137
     * noise reduction strength
2138
     * - encoding: Set by user.
2139
     * - decoding: unused
2140
     */
2141
    int noise_reduction;
2142

    
2143
    /**
2144
     * Called at the beginning of a frame to get cr buffer for it.
2145
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2146
     * libavcodec will pass previous buffer in pic, function should return
2147
     * same buffer or new buffer with old frame "painted" into it.
2148
     * If pic.data[0] == NULL must behave like get_buffer().
2149
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2150
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2151
     * some other means.
2152
     * - encoding: unused
2153
     * - decoding: Set by libavcodec, user can override.
2154
     */
2155
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2156

    
2157
    /**
2158
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2159
     * - encoding: Set by user.
2160
     * - decoding: unused
2161
     */
2162
    int rc_initial_buffer_occupancy;
2163

    
2164
    /**
2165
     *
2166
     * - encoding: Set by user.
2167
     * - decoding: unused
2168
     */
2169
    int inter_threshold;
2170

    
2171
    /**
2172
     * CODEC_FLAG2_*
2173
     * - encoding: Set by user.
2174
     * - decoding: Set by user.
2175
     */
2176
    int flags2;
2177

    
2178
    /**
2179
     * Simulates errors in the bitstream to test error concealment.
2180
     * - encoding: Set by user.
2181
     * - decoding: unused
2182
     */
2183
    int error_rate;
2184

    
2185
    /**
2186
     * MP3 antialias algorithm, see FF_AA_* below.
2187
     * - encoding: unused
2188
     * - decoding: Set by user.
2189
     */
2190
    int antialias_algo;
2191
#define FF_AA_AUTO    0
2192
#define FF_AA_FASTINT 1 //not implemented yet
2193
#define FF_AA_INT     2
2194
#define FF_AA_FLOAT   3
2195
    /**
2196
     * quantizer noise shaping
2197
     * - encoding: Set by user.
2198
     * - decoding: unused
2199
     */
2200
    int quantizer_noise_shaping;
2201

    
2202
    /**
2203
     * thread count
2204
     * is used to decide how many independent tasks should be passed to execute()
2205
     * - encoding: Set by user.
2206
     * - decoding: Set by user.
2207
     */
2208
    int thread_count;
2209

    
2210
    /**
2211
     * The codec may call this to execute several independent things.
2212
     * It will return only after finishing all tasks.
2213
     * The user may replace this with some multithreaded implementation,
2214
     * the default implementation will execute the parts serially.
2215
     * @param count the number of things to execute
2216
     * - encoding: Set by libavcodec, user can override.
2217
     * - decoding: Set by libavcodec, user can override.
2218
     */
2219
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2220

    
2221
    /**
2222
     * thread opaque
2223
     * Can be used by execute() to store some per AVCodecContext stuff.
2224
     * - encoding: set by execute()
2225
     * - decoding: set by execute()
2226
     */
2227
    void *thread_opaque;
2228

    
2229
    /**
2230
     * Motion estimation threshold below which no motion estimation is
2231
     * performed, but instead the user specified motion vectors are used.
2232
     *
2233
     * - encoding: Set by user.
2234
     * - decoding: unused
2235
     */
2236
     int me_threshold;
2237

    
2238
    /**
2239
     * Macroblock threshold below which the user specified macroblock types will be used.
2240
     * - encoding: Set by user.
2241
     * - decoding: unused
2242
     */
2243
     int mb_threshold;
2244

    
2245
    /**
2246
     * precision of the intra DC coefficient - 8
2247
     * - encoding: Set by user.
2248
     * - decoding: unused
2249
     */
2250
     int intra_dc_precision;
2251

    
2252
    /**
2253
     * noise vs. sse weight for the nsse comparsion function
2254
     * - encoding: Set by user.
2255
     * - decoding: unused
2256
     */
2257
     int nsse_weight;
2258

    
2259
    /**
2260
     * Number of macroblock rows at the top which are skipped.
2261
     * - encoding: unused
2262
     * - decoding: Set by user.
2263
     */
2264
     int skip_top;
2265

    
2266
    /**
2267
     * Number of macroblock rows at the bottom which are skipped.
2268
     * - encoding: unused
2269
     * - decoding: Set by user.
2270
     */
2271
     int skip_bottom;
2272

    
2273
    /**
2274
     * profile
2275
     * - encoding: Set by user.
2276
     * - decoding: Set by libavcodec.
2277
     */
2278
     int profile;
2279
#define FF_PROFILE_UNKNOWN -99
2280

    
2281
#define FF_PROFILE_AAC_MAIN 0
2282
#define FF_PROFILE_AAC_LOW  1
2283
#define FF_PROFILE_AAC_SSR  2
2284
#define FF_PROFILE_AAC_LTP  3
2285

    
2286
#define FF_PROFILE_DTS         20
2287
#define FF_PROFILE_DTS_ES      30
2288
#define FF_PROFILE_DTS_96_24   40
2289
#define FF_PROFILE_DTS_HD_HRA  50
2290
#define FF_PROFILE_DTS_HD_MA   60
2291

    
2292
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2293
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2294

    
2295
#define FF_PROFILE_H264_BASELINE             66
2296
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2297
#define FF_PROFILE_H264_MAIN                 77
2298
#define FF_PROFILE_H264_EXTENDED             88
2299
#define FF_PROFILE_H264_HIGH                 100
2300
#define FF_PROFILE_H264_HIGH_10              110
2301
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2302
#define FF_PROFILE_H264_HIGH_422             122
2303
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2304
#define FF_PROFILE_H264_HIGH_444             144
2305
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2306
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2307
#define FF_PROFILE_H264_CAVLC_444            44
2308

    
2309
    /**
2310
     * level
2311
     * - encoding: Set by user.
2312
     * - decoding: Set by libavcodec.
2313
     */
2314
     int level;
2315
#define FF_LEVEL_UNKNOWN -99
2316

    
2317
    /**
2318
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2319
     * - encoding: unused
2320
     * - decoding: Set by user.
2321
     */
2322
     int lowres;
2323

    
2324
    /**
2325
     * Bitstream width / height, may be different from width/height if lowres
2326
     * or other things are used.
2327
     * - encoding: unused
2328
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2329
     */
2330
    int coded_width, coded_height;
2331

    
2332
    /**
2333
     * frame skip threshold
2334
     * - encoding: Set by user.
2335
     * - decoding: unused
2336
     */
2337
    int frame_skip_threshold;
2338

    
2339
    /**
2340
     * frame skip factor
2341
     * - encoding: Set by user.
2342
     * - decoding: unused
2343
     */
2344
    int frame_skip_factor;
2345

    
2346
    /**
2347
     * frame skip exponent
2348
     * - encoding: Set by user.
2349
     * - decoding: unused
2350
     */
2351
    int frame_skip_exp;
2352

    
2353
    /**
2354
     * frame skip comparison function
2355
     * - encoding: Set by user.
2356
     * - decoding: unused
2357
     */
2358
    int frame_skip_cmp;
2359

    
2360
    /**
2361
     * Border processing masking, raises the quantizer for mbs on the borders
2362
     * of the picture.
2363
     * - encoding: Set by user.
2364
     * - decoding: unused
2365
     */
2366
    float border_masking;
2367

    
2368
    /**
2369
     * minimum MB lagrange multipler
2370
     * - encoding: Set by user.
2371
     * - decoding: unused
2372
     */
2373
    int mb_lmin;
2374

    
2375
    /**
2376
     * maximum MB lagrange multipler
2377
     * - encoding: Set by user.
2378
     * - decoding: unused
2379
     */
2380
    int mb_lmax;
2381

    
2382
    /**
2383
     *
2384
     * - encoding: Set by user.
2385
     * - decoding: unused
2386
     */
2387
    int me_penalty_compensation;
2388

    
2389
    /**
2390
     *
2391
     * - encoding: unused
2392
     * - decoding: Set by user.
2393
     */
2394
    enum AVDiscard skip_loop_filter;
2395

    
2396
    /**
2397
     *
2398
     * - encoding: unused
2399
     * - decoding: Set by user.
2400
     */
2401
    enum AVDiscard skip_idct;
2402

    
2403
    /**
2404
     *
2405
     * - encoding: unused
2406
     * - decoding: Set by user.
2407
     */
2408
    enum AVDiscard skip_frame;
2409

    
2410
    /**
2411
     *
2412
     * - encoding: Set by user.
2413
     * - decoding: unused
2414
     */
2415
    int bidir_refine;
2416

    
2417
    /**
2418
     *
2419
     * - encoding: Set by user.
2420
     * - decoding: unused
2421
     */
2422
    int brd_scale;
2423

    
2424
    /**
2425
     * constant rate factor - quality-based VBR - values ~correspond to qps
2426
     * - encoding: Set by user.
2427
     * - decoding: unused
2428
     */
2429
    float crf;
2430

    
2431
    /**
2432
     * constant quantization parameter rate control method
2433
     * - encoding: Set by user.
2434
     * - decoding: unused
2435
     */
2436
    int cqp;
2437

    
2438
    /**
2439
     * minimum GOP size
2440
     * - encoding: Set by user.
2441
     * - decoding: unused
2442
     */
2443
    int keyint_min;
2444

    
2445
    /**
2446
     * number of reference frames
2447
     * - encoding: Set by user.
2448
     * - decoding: Set by lavc.
2449
     */
2450
    int refs;
2451

    
2452
    /**
2453
     * chroma qp offset from luma
2454
     * - encoding: Set by user.
2455
     * - decoding: unused
2456
     */
2457
    int chromaoffset;
2458

    
2459
    /**
2460
     * Influences how often B-frames are used.
2461
     * - encoding: Set by user.
2462
     * - decoding: unused
2463
     */
2464
    int bframebias;
2465

    
2466
    /**
2467
     * trellis RD quantization
2468
     * - encoding: Set by user.
2469
     * - decoding: unused
2470
     */
2471
    int trellis;
2472

    
2473
    /**
2474
     * Reduce fluctuations in qp (before curve compression).
2475
     * - encoding: Set by user.
2476
     * - decoding: unused
2477
     */
2478
    float complexityblur;
2479

    
2480
    /**
2481
     * in-loop deblocking filter alphac0 parameter
2482
     * alpha is in the range -6...6
2483
     * - encoding: Set by user.
2484
     * - decoding: unused
2485
     */
2486
    int deblockalpha;
2487

    
2488
    /**
2489
     * in-loop deblocking filter beta parameter
2490
     * beta is in the range -6...6
2491
     * - encoding: Set by user.
2492
     * - decoding: unused
2493
     */
2494
    int deblockbeta;
2495

    
2496
    /**
2497
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2498
     * - encoding: Set by user.
2499
     * - decoding: unused
2500
     */
2501
    int partitions;
2502
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2503
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2504
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2505
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2506
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2507

    
2508
    /**
2509
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2510
     * - encoding: Set by user.
2511
     * - decoding: unused
2512
     */
2513
    int directpred;
2514

    
2515
    /**
2516
     * Audio cutoff bandwidth (0 means "automatic")
2517
     * - encoding: Set by user.
2518
     * - decoding: unused
2519
     */
2520
    int cutoff;
2521

    
2522
    /**
2523
     * Multiplied by qscale for each frame and added to scene_change_score.
2524
     * - encoding: Set by user.
2525
     * - decoding: unused
2526
     */
2527
    int scenechange_factor;
2528

    
2529
    /**
2530
     *
2531
     * Note: Value depends upon the compare function used for fullpel ME.
2532
     * - encoding: Set by user.
2533
     * - decoding: unused
2534
     */
2535
    int mv0_threshold;
2536

    
2537
    /**
2538
     * Adjusts sensitivity of b_frame_strategy 1.
2539
     * - encoding: Set by user.
2540
     * - decoding: unused
2541
     */
2542
    int b_sensitivity;
2543

    
2544
    /**
2545
     * - encoding: Set by user.
2546
     * - decoding: unused
2547
     */
2548
    int compression_level;
2549
#define FF_COMPRESSION_DEFAULT -1
2550

    
2551
#if FF_API_USE_LPC
2552
    /**
2553
     * Sets whether to use LPC mode - used by FLAC encoder.
2554
     * - encoding: Set by user.
2555
     * - decoding: unused
2556
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2557
     */
2558
    int use_lpc;
2559
#endif
2560

    
2561
    /**
2562
     * LPC coefficient precision - used by FLAC encoder
2563
     * - encoding: Set by user.
2564
     * - decoding: unused
2565
     */
2566
    int lpc_coeff_precision;
2567

    
2568
    /**
2569
     * - encoding: Set by user.
2570
     * - decoding: unused
2571
     */
2572
    int min_prediction_order;
2573

    
2574
    /**
2575
     * - encoding: Set by user.
2576
     * - decoding: unused
2577
     */
2578
    int max_prediction_order;
2579

    
2580
    /**
2581
     * search method for selecting prediction order
2582
     * - encoding: Set by user.
2583
     * - decoding: unused
2584
     */
2585
    int prediction_order_method;
2586

    
2587
    /**
2588
     * - encoding: Set by user.
2589
     * - decoding: unused
2590
     */
2591
    int min_partition_order;
2592

    
2593
    /**
2594
     * - encoding: Set by user.
2595
     * - decoding: unused
2596
     */
2597
    int max_partition_order;
2598

    
2599
    /**
2600
     * GOP timecode frame start number, in non drop frame format
2601
     * - encoding: Set by user.
2602
     * - decoding: unused
2603
     */
2604
    int64_t timecode_frame_start;
2605

    
2606
#if LIBAVCODEC_VERSION_MAJOR < 53
2607
    /**
2608
     * Decoder should decode to this many channels if it can (0 for default)
2609
     * - encoding: unused
2610
     * - decoding: Set by user.
2611
     * @deprecated Deprecated in favor of request_channel_layout.
2612
     */
2613
    int request_channels;
2614
#endif
2615

    
2616
    /**
2617
     * Percentage of dynamic range compression to be applied by the decoder.
2618
     * The default value is 1.0, corresponding to full compression.
2619
     * - encoding: unused
2620
     * - decoding: Set by user.
2621
     */
2622
    float drc_scale;
2623

    
2624
    /**
2625
     * opaque 64bit number (generally a PTS) that will be reordered and
2626
     * output in AVFrame.reordered_opaque
2627
     * @deprecated in favor of pkt_pts
2628
     * - encoding: unused
2629
     * - decoding: Set by user.
2630
     */
2631
    int64_t reordered_opaque;
2632

    
2633
    /**
2634
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2635
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2636
     * - encoding: set by user.
2637
     * - decoding: set by libavcodec.
2638
     */
2639
    int bits_per_raw_sample;
2640

    
2641
    /**
2642
     * Audio channel layout.
2643
     * - encoding: set by user.
2644
     * - decoding: set by libavcodec.
2645
     */
2646
    int64_t channel_layout;
2647

    
2648
    /**
2649
     * Request decoder to use this channel layout if it can (0 for default)
2650
     * - encoding: unused
2651
     * - decoding: Set by user.
2652
     */
2653
    int64_t request_channel_layout;
2654

    
2655
    /**
2656
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2657
     * - encoding: Set by user.
2658
     * - decoding: unused.
2659
     */
2660
    float rc_max_available_vbv_use;
2661

    
2662
    /**
2663
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2664
     * - encoding: Set by user.
2665
     * - decoding: unused.
2666
     */
2667
    float rc_min_vbv_overflow_use;
2668

    
2669
    /**
2670
     * Hardware accelerator in use
2671
     * - encoding: unused.
2672
     * - decoding: Set by libavcodec
2673
     */
2674
    struct AVHWAccel *hwaccel;
2675

    
2676
    /**
2677
     * For some codecs, the time base is closer to the field rate than the frame rate.
2678
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2679
     * if no telecine is used ...
2680
     *
2681
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2682
     */
2683
    int ticks_per_frame;
2684

    
2685
    /**
2686
     * Hardware accelerator context.
2687
     * For some hardware accelerators, a global context needs to be
2688
     * provided by the user. In that case, this holds display-dependent
2689
     * data FFmpeg cannot instantiate itself. Please refer to the
2690
     * FFmpeg HW accelerator documentation to know how to fill this
2691
     * is. e.g. for VA API, this is a struct vaapi_context.
2692
     * - encoding: unused
2693
     * - decoding: Set by user
2694
     */
2695
    void *hwaccel_context;
2696

    
2697
    /**
2698
     * Chromaticity coordinates of the source primaries.
2699
     * - encoding: Set by user
2700
     * - decoding: Set by libavcodec
2701
     */
2702
    enum AVColorPrimaries color_primaries;
2703

    
2704
    /**
2705
     * Color Transfer Characteristic.
2706
     * - encoding: Set by user
2707
     * - decoding: Set by libavcodec
2708
     */
2709
    enum AVColorTransferCharacteristic color_trc;
2710

    
2711
    /**
2712
     * YUV colorspace type.
2713
     * - encoding: Set by user
2714
     * - decoding: Set by libavcodec
2715
     */
2716
    enum AVColorSpace colorspace;
2717

    
2718
    /**
2719
     * MPEG vs JPEG YUV range.
2720
     * - encoding: Set by user
2721
     * - decoding: Set by libavcodec
2722
     */
2723
    enum AVColorRange color_range;
2724

    
2725
    /**
2726
     * This defines the location of chroma samples.
2727
     * - encoding: Set by user
2728
     * - decoding: Set by libavcodec
2729
     */
2730
    enum AVChromaLocation chroma_sample_location;
2731

    
2732
    /**
2733
     * The codec may call this to execute several independent things.
2734
     * It will return only after finishing all tasks.
2735
     * The user may replace this with some multithreaded implementation,
2736
     * the default implementation will execute the parts serially.
2737
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2738
     * @param c context passed also to func
2739
     * @param count the number of things to execute
2740
     * @param arg2 argument passed unchanged to func
2741
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2742
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2743
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2744
     *             two instances of func executing at the same time will have the same threadnr.
2745
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2746
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2747
     * - encoding: Set by libavcodec, user can override.
2748
     * - decoding: Set by libavcodec, user can override.
2749
     */
2750
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2751

    
2752
    /**
2753
     * explicit P-frame weighted prediction analysis method
2754
     * 0: off
2755
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2756
     * 2: smart weighting (full fade detection analysis)
2757
     * - encoding: Set by user.
2758
     * - decoding: unused
2759
     */
2760
    int weighted_p_pred;
2761

    
2762
    /**
2763
     * AQ mode
2764
     * 0: Disabled
2765
     * 1: Variance AQ (complexity mask)
2766
     * 2: Auto-variance AQ (experimental)
2767
     * - encoding: Set by user
2768
     * - decoding: unused
2769
     */
2770
    int aq_mode;
2771

    
2772
    /**
2773
     * AQ strength
2774
     * Reduces blocking and blurring in flat and textured areas.
2775
     * - encoding: Set by user
2776
     * - decoding: unused
2777
     */
2778
    float aq_strength;
2779

    
2780
    /**
2781
     * PSY RD
2782
     * Strength of psychovisual optimization
2783
     * - encoding: Set by user
2784
     * - decoding: unused
2785
     */
2786
    float psy_rd;
2787

    
2788
    /**
2789
     * PSY trellis
2790
     * Strength of psychovisual optimization
2791
     * - encoding: Set by user
2792
     * - decoding: unused
2793
     */
2794
    float psy_trellis;
2795

    
2796
    /**
2797
     * RC lookahead
2798
     * Number of frames for frametype and ratecontrol lookahead
2799
     * - encoding: Set by user
2800
     * - decoding: unused
2801
     */
2802
    int rc_lookahead;
2803

    
2804
    /**
2805
     * Constant rate factor maximum
2806
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2807
     * than crf_max, even if doing so would violate VBV restrictions.
2808
     * - encoding: Set by user.
2809
     * - decoding: unused
2810
     */
2811
    float crf_max;
2812

    
2813
    int log_level_offset;
2814

    
2815
    /**
2816
     * Determines which LPC analysis algorithm to use.
2817
     * - encoding: Set by user
2818
     * - decoding: unused
2819
     */
2820
    enum AVLPCType lpc_type;
2821

    
2822
    /**
2823
     * Number of passes to use for Cholesky factorization during LPC analysis
2824
     * - encoding: Set by user
2825
     * - decoding: unused
2826
     */
2827
    int lpc_passes;
2828

    
2829
    /**
2830
     * Number of slices.
2831
     * Indicates number of picture subdivisions. Used for parallelized
2832
     * decoding.
2833
     * - encoding: Set by user
2834
     * - decoding: unused
2835
     */
2836
    int slices;
2837

    
2838
    /**
2839
     * Header containing style information for text subtitles.
2840
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2841
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2842
     * the Format line following. It shouldn't include any Dialogue line.
2843
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2844
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2845
     */
2846
    uint8_t *subtitle_header;
2847
    int subtitle_header_size;
2848

    
2849
    /**
2850
     * Current packet as passed into the decoder, to avoid having
2851
     * to pass the packet into every function. Currently only valid
2852
     * inside lavc and get/release_buffer callbacks.
2853
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2854
     * - encoding: unused
2855
     */
2856
    AVPacket *pkt;
2857

    
2858
    /**
2859
     * Whether this is a copy of the context which had init() called on it.
2860
     * This is used by multithreading - shared tables and picture pointers
2861
     * should be freed from the original context only.
2862
     * - encoding: Set by libavcodec.
2863
     * - decoding: Set by libavcodec.
2864
     */
2865
    int is_copy;
2866

    
2867
    /**
2868
     * Which multithreading methods to use.
2869
     * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2870
     * so clients which cannot provide future frames should not use it.
2871
     *
2872
     * - encoding: Set by user, otherwise the default is used.
2873
     * - decoding: Set by user, otherwise the default is used.
2874
     */
2875
    int thread_type;
2876
#define FF_THREAD_FRAME   1 //< Decode more than one frame at once
2877
#define FF_THREAD_SLICE   2 //< Decode more than one part of a single frame at once
2878

    
2879
    /**
2880
     * Which multithreading methods are in use by the codec.
2881
     * - encoding: Set by libavcodec.
2882
     * - decoding: Set by libavcodec.
2883
     */
2884
    int active_thread_type;
2885

    
2886
    /**
2887
     * Set by the client if its custom get_buffer() callback can be called
2888
     * from another thread, which allows faster multithreaded decoding.
2889
     * draw_horiz_band() will be called from other threads regardless of this setting.
2890
     * Ignored if the default get_buffer() is used.
2891
     * - encoding: Set by user.
2892
     * - decoding: Set by user.
2893
     */
2894
    int thread_safe_callbacks;
2895

    
2896
    /**
2897
     * VBV delay coded in the last frame (in periods of a 27 MHz clock).
2898
     * Used for compliant TS muxing.
2899
     * - encoding: Set by libavcodec.
2900
     * - decoding: unused.
2901
     */
2902
    uint64_t vbv_delay;
2903
} AVCodecContext;
2904

    
2905
/**
2906
 * AVProfile.
2907
 */
2908
typedef struct AVProfile {
2909
    int profile;
2910
    const char *name; ///< short name for the profile
2911
} AVProfile;
2912

    
2913
/**
2914
 * AVCodec.
2915
 */
2916
typedef struct AVCodec {
2917
    /**
2918
     * Name of the codec implementation.
2919
     * The name is globally unique among encoders and among decoders (but an
2920
     * encoder and a decoder can share the same name).
2921
     * This is the primary way to find a codec from the user perspective.
2922
     */
2923
    const char *name;
2924
    enum AVMediaType type;
2925
    enum CodecID id;
2926
    int priv_data_size;
2927
    int (*init)(AVCodecContext *);
2928
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2929
    int (*close)(AVCodecContext *);
2930
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2931
    /**
2932
     * Codec capabilities.
2933
     * see CODEC_CAP_*
2934
     */
2935
    int capabilities;
2936
    struct AVCodec *next;
2937
    /**
2938
     * Flush buffers.
2939
     * Will be called when seeking
2940
     */
2941
    void (*flush)(AVCodecContext *);
2942
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2943
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2944
    /**
2945
     * Descriptive name for the codec, meant to be more human readable than name.
2946
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2947
     */
2948
    const char *long_name;
2949
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2950
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2951
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2952
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2953
    AVClass *priv_class;                    ///< AVClass for the private context
2954
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2955

    
2956
    /**
2957
     * @defgroup framethreading Frame-level threading support functions.
2958
     * @{
2959
     */
2960
    /**
2961
     * If defined, called on thread contexts when they are created.
2962
     * If the codec allocates writable tables in init(), re-allocate them here.
2963
     * priv_data will be set to a copy of the original.
2964
     */
2965
    int (*init_thread_copy)(AVCodecContext *);
2966
    /**
2967
     * Copy necessary context variables from a previous thread context to the current one.
2968
     * If not defined, the next thread will start automatically; otherwise, the codec
2969
     * must call ff_thread_finish_setup().
2970
     *
2971
     * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
2972
     */
2973
    int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
2974
    /** @} */
2975
} AVCodec;
2976

    
2977
/**
2978
 * AVHWAccel.
2979
 */
2980
typedef struct AVHWAccel {
2981
    /**
2982
     * Name of the hardware accelerated codec.
2983
     * The name is globally unique among encoders and among decoders (but an
2984
     * encoder and a decoder can share the same name).
2985
     */
2986
    const char *name;
2987

    
2988
    /**
2989
     * Type of codec implemented by the hardware accelerator.
2990
     *
2991
     * See AVMEDIA_TYPE_xxx
2992
     */
2993
    enum AVMediaType type;
2994

    
2995
    /**
2996
     * Codec implemented by the hardware accelerator.
2997
     *
2998
     * See CODEC_ID_xxx
2999
     */
3000
    enum CodecID id;
3001

    
3002
    /**
3003
     * Supported pixel format.
3004
     *
3005
     * Only hardware accelerated formats are supported here.
3006
     */
3007
    enum PixelFormat pix_fmt;
3008

    
3009
    /**
3010
     * Hardware accelerated codec capabilities.
3011
     * see FF_HWACCEL_CODEC_CAP_*
3012
     */
3013
    int capabilities;
3014

    
3015
    struct AVHWAccel *next;
3016

    
3017
    /**
3018
     * Called at the beginning of each frame or field picture.
3019
     *
3020
     * Meaningful frame information (codec specific) is guaranteed to
3021
     * be parsed at this point. This function is mandatory.
3022
     *
3023
     * Note that buf can be NULL along with buf_size set to 0.
3024
     * Otherwise, this means the whole frame is available at this point.
3025
     *
3026
     * @param avctx the codec context
3027
     * @param buf the frame data buffer base
3028
     * @param buf_size the size of the frame in bytes
3029
     * @return zero if successful, a negative value otherwise
3030
     */
3031
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3032

    
3033
    /**
3034
     * Callback for each slice.
3035
     *
3036
     * Meaningful slice information (codec specific) is guaranteed to
3037
     * be parsed at this point. This function is mandatory.
3038
     *
3039
     * @param avctx the codec context
3040
     * @param buf the slice data buffer base
3041
     * @param buf_size the size of the slice in bytes
3042
     * @return zero if successful, a negative value otherwise
3043
     */
3044
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3045

    
3046
    /**
3047
     * Called at the end of each frame or field picture.
3048
     *
3049
     * The whole picture is parsed at this point and can now be sent
3050
     * to the hardware accelerator. This function is mandatory.
3051
     *
3052
     * @param avctx the codec context
3053
     * @return zero if successful, a negative value otherwise
3054
     */
3055
    int (*end_frame)(AVCodecContext *avctx);
3056

    
3057
    /**
3058
     * Size of HW accelerator private data.
3059
     *
3060
     * Private data is allocated with av_mallocz() before
3061
     * AVCodecContext.get_buffer() and deallocated after
3062
     * AVCodecContext.release_buffer().
3063
     */
3064
    int priv_data_size;
3065
} AVHWAccel;
3066

    
3067
/**
3068
 * four components are given, that's all.
3069
 * the last component is alpha
3070
 */
3071
typedef struct AVPicture {
3072
    uint8_t *data[4];
3073
    int linesize[4];       ///< number of bytes per line
3074
} AVPicture;
3075

    
3076
#if FF_API_PALETTE_CONTROL
3077
/**
3078
 * AVPaletteControl
3079
 * This structure defines a method for communicating palette changes
3080
 * between and demuxer and a decoder.
3081
 *
3082
 * @deprecated Use AVPacket to send palette changes instead.
3083
 * This is totally broken.
3084
 */
3085
#define AVPALETTE_SIZE 1024
3086
#define AVPALETTE_COUNT 256
3087
typedef struct AVPaletteControl {
3088

    
3089
    /* Demuxer sets this to 1 to indicate the palette has changed;
3090
     * decoder resets to 0. */
3091
    int palette_changed;
3092

    
3093
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3094
     * the individual palette components should be on a 8-bit scale; if
3095
     * the palette data comes from an IBM VGA native format, the component
3096
     * data is probably 6 bits in size and needs to be scaled. */
3097
    unsigned int palette[AVPALETTE_COUNT];
3098

    
3099
} AVPaletteControl attribute_deprecated;
3100
#endif
3101

    
3102
enum AVSubtitleType {
3103
    SUBTITLE_NONE,
3104

    
3105
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3106

    
3107
    /**
3108
     * Plain text, the text field must be set by the decoder and is
3109
     * authoritative. ass and pict fields may contain approximations.
3110
     */
3111
    SUBTITLE_TEXT,
3112

    
3113
    /**
3114
     * Formatted text, the ass field must be set by the decoder and is
3115
     * authoritative. pict and text fields may contain approximations.
3116
     */
3117
    SUBTITLE_ASS,
3118
};
3119

    
3120
typedef struct AVSubtitleRect {
3121
    int x;         ///< top left corner  of pict, undefined when pict is not set
3122
    int y;         ///< top left corner  of pict, undefined when pict is not set
3123
    int w;         ///< width            of pict, undefined when pict is not set
3124
    int h;         ///< height           of pict, undefined when pict is not set
3125
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3126

    
3127
    /**
3128
     * data+linesize for the bitmap of this subtitle.
3129
     * can be set for text/ass as well once they where rendered
3130
     */
3131
    AVPicture pict;
3132
    enum AVSubtitleType type;
3133

    
3134
    char *text;                     ///< 0 terminated plain UTF-8 text
3135

    
3136
    /**
3137
     * 0 terminated ASS/SSA compatible event line.
3138
     * The pressentation of this is unaffected by the other values in this
3139
     * struct.
3140
     */
3141
    char *ass;
3142
} AVSubtitleRect;
3143

    
3144
typedef struct AVSubtitle {
3145
    uint16_t format; /* 0 = graphics */
3146
    uint32_t start_display_time; /* relative to packet pts, in ms */
3147
    uint32_t end_display_time; /* relative to packet pts, in ms */
3148
    unsigned num_rects;
3149
    AVSubtitleRect **rects;
3150
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3151
} AVSubtitle;
3152

    
3153
/* packet functions */
3154

    
3155
/**
3156
 * @deprecated use NULL instead
3157
 */
3158
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3159

    
3160
/**
3161
 * Default packet destructor.
3162
 */
3163
void av_destruct_packet(AVPacket *pkt);
3164

    
3165
/**
3166
 * Initialize optional fields of a packet with default values.
3167
 *
3168
 * @param pkt packet
3169
 */
3170
void av_init_packet(AVPacket *pkt);
3171

    
3172
/**
3173
 * Allocate the payload of a packet and initialize its fields with
3174
 * default values.
3175
 *
3176
 * @param pkt packet
3177
 * @param size wanted payload size
3178
 * @return 0 if OK, AVERROR_xxx otherwise
3179
 */
3180
int av_new_packet(AVPacket *pkt, int size);
3181

    
3182
/**
3183
 * Reduce packet size, correctly zeroing padding
3184
 *
3185
 * @param pkt packet
3186
 * @param size new size
3187
 */
3188
void av_shrink_packet(AVPacket *pkt, int size);
3189

    
3190
/**
3191
 * Increase packet size, correctly zeroing padding
3192
 *
3193
 * @param pkt packet
3194
 * @param grow_by number of bytes by which to increase the size of the packet
3195
 */
3196
int av_grow_packet(AVPacket *pkt, int grow_by);
3197

    
3198
/**
3199
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3200
 * packet is allocated if it was not really allocated.
3201
 */
3202
int av_dup_packet(AVPacket *pkt);
3203

    
3204
/**
3205
 * Free a packet.
3206
 *
3207
 * @param pkt packet to free
3208
 */
3209
void av_free_packet(AVPacket *pkt);
3210

    
3211
/* resample.c */
3212

    
3213
struct ReSampleContext;
3214
struct AVResampleContext;
3215

    
3216
typedef struct ReSampleContext ReSampleContext;
3217

    
3218
#if FF_API_AUDIO_OLD
3219
/**
3220
 * @deprecated Use av_audio_resample_init() instead.
3221
 */
3222
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3223
                                                          int output_rate, int input_rate);
3224
#endif
3225

    
3226
/**
3227
 *  Initialize audio resampling context.
3228
 *
3229
 * @param output_channels  number of output channels
3230
 * @param input_channels   number of input channels
3231
 * @param output_rate      output sample rate
3232
 * @param input_rate       input sample rate
3233
 * @param sample_fmt_out   requested output sample format
3234
 * @param sample_fmt_in    input sample format
3235
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff frequency
3236
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3237
 * @param linear           if 1 then the used FIR filter will be linearly interpolated
3238
                           between the 2 closest, if 0 the closest will be used
3239
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3240
 * @return allocated ReSampleContext, NULL if error occured
3241
 */
3242
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3243
                                        int output_rate, int input_rate,
3244
                                        enum AVSampleFormat sample_fmt_out,
3245
                                        enum AVSampleFormat sample_fmt_in,
3246
                                        int filter_length, int log2_phase_count,
3247
                                        int linear, double cutoff);
3248

    
3249
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3250

    
3251
/**
3252
 * Free resample context.
3253
 *
3254
 * @param s a non-NULL pointer to a resample context previously
3255
 *          created with av_audio_resample_init()
3256
 */
3257
void audio_resample_close(ReSampleContext *s);
3258

    
3259

    
3260
/**
3261
 * Initialize an audio resampler.
3262
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3263
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3264
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3265
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3266
                 between the 2 closest, if 0 the closest will be used
3267
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3268
 */
3269
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3270

    
3271
/**
3272
 * Resample an array of samples using a previously configured context.
3273
 * @param src an array of unconsumed samples
3274
 * @param consumed the number of samples of src which have been consumed are returned here
3275
 * @param src_size the number of unconsumed samples available
3276
 * @param dst_size the amount of space in samples available in dst
3277
 * @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.
3278
 * @return the number of samples written in dst or -1 if an error occurred
3279
 */
3280
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3281

    
3282

    
3283
/**
3284
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3285
 * the resampler parameters, so no audible clicks or similar distortions occur
3286
 * @param compensation_distance distance in output samples over which the compensation should be performed
3287
 * @param sample_delta number of output samples which should be output less
3288
 *
3289
 * example: av_resample_compensate(c, 10, 500)
3290
 * here instead of 510 samples only 500 samples would be output
3291
 *
3292
 * note, due to rounding the actual compensation might be slightly different,
3293
 * especially if the compensation_distance is large and the in_rate used during init is small
3294
 */
3295
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3296
void av_resample_close(struct AVResampleContext *c);
3297

    
3298
/**
3299
 * Allocate memory for a picture.  Call avpicture_free to free it.
3300
 *
3301
 * @param picture the picture to be filled in
3302
 * @param pix_fmt the format of the picture
3303
 * @param width the width of the picture
3304
 * @param height the height of the picture
3305
 * @return zero if successful, a negative value if not
3306
 */
3307
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3308

    
3309
/**
3310
 * Free a picture previously allocated by avpicture_alloc().
3311
 *
3312
 * @param picture the AVPicture to be freed
3313
 */
3314
void avpicture_free(AVPicture *picture);
3315

    
3316
/**
3317
 * Fill in the AVPicture fields.
3318
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3319
 * which points to the image data buffer. Depending on the specified picture
3320
 * format, one or multiple image data pointers and line sizes will be set.
3321
 * If a planar format is specified, several pointers will be set pointing to
3322
 * the different picture planes and the line sizes of the different planes
3323
 * will be stored in the lines_sizes array.
3324
 * Call with ptr == NULL to get the required size for the ptr buffer.
3325
 *
3326
 * @param picture AVPicture whose fields are to be filled in
3327
 * @param ptr Buffer which will contain or contains the actual image data
3328
 * @param pix_fmt The format in which the picture data is stored.
3329
 * @param width the width of the image in pixels
3330
 * @param height the height of the image in pixels
3331
 * @return size of the image data in bytes
3332
 */
3333
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3334
                   enum PixelFormat pix_fmt, int width, int height);
3335
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3336
                     unsigned char *dest, int dest_size);
3337

    
3338
/**
3339
 * Calculate the size in bytes that a picture of the given width and height
3340
 * would occupy if stored in the given picture format.
3341
 * Note that this returns the size of a compact representation as generated
3342
 * by avpicture_layout, which can be smaller than the size required for e.g.
3343
 * avpicture_fill.
3344
 *
3345
 * @param pix_fmt the given picture format
3346
 * @param width the width of the image
3347
 * @param height the height of the image
3348
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3349
 */
3350
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3351
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3352
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3353
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3354

    
3355
#if LIBAVCODEC_VERSION_MAJOR < 53
3356
/**
3357
 * Return the pixel format corresponding to the name name.
3358
 *
3359
 * If there is no pixel format with name name, then look for a
3360
 * pixel format with the name corresponding to the native endian
3361
 * format of name.
3362
 * For example in a little-endian system, first look for "gray16",
3363
 * then for "gray16le".
3364
 *
3365
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3366
 *
3367
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3368
 */
3369
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3370
#endif
3371

    
3372
/**
3373
 * Return a value representing the fourCC code associated to the
3374
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3375
 * found.
3376
 */
3377
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3378

    
3379
/**
3380
 * Put a string representing the codec tag codec_tag in buf.
3381
 *
3382
 * @param buf_size size in bytes of buf
3383
 * @return the length of the string that would have been generated if
3384
 * enough space had been available, excluding the trailing null
3385
 */
3386
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3387

    
3388
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3389
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3390
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3391
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3392
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3393
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3394

    
3395
/**
3396
 * Compute what kind of losses will occur when converting from one specific
3397
 * pixel format to another.
3398
 * When converting from one pixel format to another, information loss may occur.
3399
 * For example, when converting from RGB24 to GRAY, the color information will
3400
 * be lost. Similarly, other losses occur when converting from some formats to
3401
 * other formats. These losses can involve loss of chroma, but also loss of
3402
 * resolution, loss of color depth, loss due to the color space conversion, loss
3403
 * of the alpha bits or loss due to color quantization.
3404
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3405
 * which will occur when converting from one pixel format to another.
3406
 *
3407
 * @param[in] dst_pix_fmt destination pixel format
3408
 * @param[in] src_pix_fmt source pixel format
3409
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3410
 * @return Combination of flags informing you what kind of losses will occur.
3411
 */
3412
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3413
                             int has_alpha);
3414

    
3415
/**
3416
 * Find the best pixel format to convert to given a certain source pixel
3417
 * format.  When converting from one pixel format to another, information loss
3418
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3419
 * information will be lost. Similarly, other losses occur when converting from
3420
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3421
 * the given pixel formats should be used to suffer the least amount of loss.
3422
 * The pixel formats from which it chooses one, are determined by the
3423
 * pix_fmt_mask parameter.
3424
 *
3425
 * @code
3426
 * src_pix_fmt = PIX_FMT_YUV420P;
3427
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3428
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3429
 * @endcode
3430
 *
3431
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3432
 * @param[in] src_pix_fmt source pixel format
3433
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3434
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3435
 * @return The best pixel format to convert to or -1 if none was found.
3436
 */
3437
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3438
                              int has_alpha, int *loss_ptr);
3439

    
3440
#if LIBAVCODEC_VERSION_MAJOR < 53
3441
/**
3442
 * @deprecated Use av_get_pix_fmt_string() instead.
3443
 */
3444
attribute_deprecated
3445
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3446
#endif
3447

    
3448
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3449
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3450

    
3451
/**
3452
 * Tell if an image really has transparent alpha values.
3453
 * @return ored mask of FF_ALPHA_xxx constants
3454
 */
3455
int img_get_alpha_info(const AVPicture *src,
3456
                       enum PixelFormat pix_fmt, int width, int height);
3457

    
3458
/* deinterlace a picture */
3459
/* deinterlace - if not supported return -1 */
3460
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3461
                          enum PixelFormat pix_fmt, int width, int height);
3462

    
3463
/* external high level API */
3464

    
3465
/**
3466
 * If c is NULL, returns the first registered codec,
3467
 * if c is non-NULL, returns the next registered codec after c,
3468
 * or NULL if c is the last one.
3469
 */
3470
AVCodec *av_codec_next(AVCodec *c);
3471

    
3472
/**
3473
 * Return the LIBAVCODEC_VERSION_INT constant.
3474
 */
3475
unsigned avcodec_version(void);
3476

    
3477
/**
3478
 * Return the libavcodec build-time configuration.
3479
 */
3480
const char *avcodec_configuration(void);
3481

    
3482
/**
3483
 * Return the libavcodec license.
3484
 */
3485
const char *avcodec_license(void);
3486

    
3487
/**
3488
 * Initialize libavcodec.
3489
 *
3490
 * @warning This function must be called before any other libavcodec
3491
 * function.
3492
 */
3493
void avcodec_init(void);
3494

    
3495
#if LIBAVCODEC_VERSION_MAJOR < 53
3496
/**
3497
 * @deprecated Deprecated in favor of avcodec_register().
3498
 */
3499
attribute_deprecated void register_avcodec(AVCodec *codec);
3500
#endif
3501

    
3502
/**
3503
 * Register the codec codec and initialize libavcodec.
3504
 *
3505
 * @see avcodec_init()
3506
 */
3507
void avcodec_register(AVCodec *codec);
3508

    
3509
/**
3510
 * Find a registered encoder with a matching codec ID.
3511
 *
3512
 * @param id CodecID of the requested encoder
3513
 * @return An encoder if one was found, NULL otherwise.
3514
 */
3515
AVCodec *avcodec_find_encoder(enum CodecID id);
3516

    
3517
/**
3518
 * Find a registered encoder with the specified name.
3519
 *
3520
 * @param name name of the requested encoder
3521
 * @return An encoder if one was found, NULL otherwise.
3522
 */
3523
AVCodec *avcodec_find_encoder_by_name(const char *name);
3524

    
3525
/**
3526
 * Find a registered decoder with a matching codec ID.
3527
 *
3528
 * @param id CodecID of the requested decoder
3529
 * @return A decoder if one was found, NULL otherwise.
3530
 */
3531
AVCodec *avcodec_find_decoder(enum CodecID id);
3532

    
3533
/**
3534
 * Find a registered decoder with the specified name.
3535
 *
3536
 * @param name name of the requested decoder
3537
 * @return A decoder if one was found, NULL otherwise.
3538
 */
3539
AVCodec *avcodec_find_decoder_by_name(const char *name);
3540
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3541

    
3542
/**
3543
 * Return a name for the specified profile, if available.
3544
 *
3545
 * @param codec the codec that is searched for the given profile
3546
 * @param profile the profile value for which a name is requested
3547
 * @return A name for the profile if found, NULL otherwise.
3548
 */
3549
const char *av_get_profile_name(const AVCodec *codec, int profile);
3550

    
3551
/**
3552
 * Set the fields of the given AVCodecContext to default values.
3553
 *
3554
 * @param s The AVCodecContext of which the fields should be set to default values.
3555
 */
3556
void avcodec_get_context_defaults(AVCodecContext *s);
3557

    
3558
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3559
 *  we WILL change its arguments and name a few times! */
3560
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3561

    
3562
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3563
 *  we WILL change its arguments and name a few times! */
3564
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3565

    
3566
/**
3567
 * Allocate an AVCodecContext and set its fields to default values.  The
3568
 * resulting struct can be deallocated by simply calling av_free().
3569
 *
3570
 * @return An AVCodecContext filled with default values or NULL on failure.
3571
 * @see avcodec_get_context_defaults
3572
 */
3573
AVCodecContext *avcodec_alloc_context(void);
3574

    
3575
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3576
 *  we WILL change its arguments and name a few times! */
3577
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3578

    
3579
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3580
 *  we WILL change its arguments and name a few times! */
3581
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3582

    
3583
/**
3584
 * Copy the settings of the source AVCodecContext into the destination
3585
 * AVCodecContext. The resulting destination codec context will be
3586
 * unopened, i.e. you are required to call avcodec_open() before you
3587
 * can use this AVCodecContext to decode/encode video/audio data.
3588
 *
3589
 * @param dest target codec context, should be initialized with
3590
 *             avcodec_alloc_context(), but otherwise uninitialized
3591
 * @param src source codec context
3592
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3593
 */
3594
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3595

    
3596
/**
3597
 * Set the fields of the given AVFrame to default values.
3598
 *
3599
 * @param pic The AVFrame of which the fields should be set to default values.
3600
 */
3601
void avcodec_get_frame_defaults(AVFrame *pic);
3602

    
3603
/**
3604
 * Allocate an AVFrame and set its fields to default values.  The resulting
3605
 * struct can be deallocated by simply calling av_free().
3606
 *
3607
 * @return An AVFrame filled with default values or NULL on failure.
3608
 * @see avcodec_get_frame_defaults
3609
 */
3610
AVFrame *avcodec_alloc_frame(void);
3611

    
3612
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3613
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3614
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3615

    
3616
/**
3617
 * Return the amount of padding in pixels which the get_buffer callback must
3618
 * provide around the edge of the image for codecs which do not have the
3619
 * CODEC_FLAG_EMU_EDGE flag.
3620
 *
3621
 * @return Required padding in pixels.
3622
 */
3623
unsigned avcodec_get_edge_width(void);
3624
/**
3625
 * Modify width and height values so that they will result in a memory
3626
 * buffer that is acceptable for the codec if you do not use any horizontal
3627
 * padding.
3628
 *
3629
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3630
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3631
 * according to avcodec_get_edge_width() before.
3632
 */
3633
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3634
/**
3635
 * Modify width and height values so that they will result in a memory
3636
 * buffer that is acceptable for the codec if you also ensure that all
3637
 * line sizes are a multiple of the respective linesize_align[i].
3638
 *
3639
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3640
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3641
 * according to avcodec_get_edge_width() before.
3642
 */
3643
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3644
                               int linesize_align[4]);
3645

    
3646
#if LIBAVCODEC_VERSION_MAJOR < 53
3647
/**
3648
 * @deprecated Deprecated in favor of av_check_image_size().
3649
 */
3650
attribute_deprecated
3651
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3652
#endif
3653

    
3654
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3655

    
3656
#if LIBAVCODEC_VERSION_MAJOR < 53
3657
/**
3658
 * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this.
3659
 */
3660
attribute_deprecated
3661
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3662
void avcodec_thread_free(AVCodecContext *s);
3663
#endif
3664
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3665
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3666
//FIXME func typedef
3667

    
3668
/**
3669
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3670
 * function the context has to be allocated.
3671
 *
3672
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3673
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3674
 * retrieving a codec.
3675
 *
3676
 * @warning This function is not thread safe!
3677
 *
3678
 * @code
3679
 * avcodec_register_all();
3680
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3681
 * if (!codec)
3682
 *     exit(1);
3683
 *
3684
 * context = avcodec_alloc_context();
3685
 *
3686
 * if (avcodec_open(context, codec) < 0)
3687
 *     exit(1);
3688
 * @endcode
3689
 *
3690
 * @param avctx The context which will be set up to use the given codec.
3691
 * @param codec The codec to use within the context.
3692
 * @return zero on success, a negative value on error
3693
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3694
 */
3695
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3696

    
3697
#if FF_API_AUDIO_OLD
3698
/**
3699
 * Decode an audio frame from buf into samples.
3700
 * Wrapper function which calls avcodec_decode_audio3.
3701
 *
3702
 * @deprecated Use avcodec_decode_audio3 instead.
3703
 * @param avctx the codec context
3704
 * @param[out] samples the output buffer
3705
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3706
 * @param[in] buf the input buffer
3707
 * @param[in] buf_size the input buffer size in bytes
3708
 * @return On error a negative value is returned, otherwise the number of bytes
3709
 * used or zero if no frame could be decompressed.
3710
 */
3711
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3712
                         int *frame_size_ptr,
3713
                         const uint8_t *buf, int buf_size);
3714
#endif
3715

    
3716
/**
3717
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3718
 * Some decoders may support multiple frames in a single AVPacket, such
3719
 * decoders would then just decode the first frame. In this case,
3720
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3721
 * the remaining data in order to decode the second frame etc.
3722
 * If no frame
3723
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3724
 * decompressed frame size in bytes.
3725
 *
3726
 * @warning You must set frame_size_ptr to the allocated size of the
3727
 * output buffer before calling avcodec_decode_audio3().
3728
 *
3729
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3730
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3731
 * bits at once and could read over the end.
3732
 *
3733
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3734
 * no overreading happens for damaged MPEG streams.
3735
 *
3736
 * @note You might have to align the input buffer avpkt->data and output buffer
3737
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3738
 * necessary at all, on others it won't work at all if not aligned and on others
3739
 * it will work but it will have an impact on performance.
3740
 *
3741
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3742
 * samples should be 16 byte aligned unless the CPU doesn't need it
3743
 * (AltiVec and SSE do).
3744
 *
3745
 * @param avctx the codec context
3746
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3747
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3748
 * @param[in] avpkt The input AVPacket containing the input buffer.
3749
 *            You can create such packet with av_init_packet() and by then setting
3750
 *            data and size, some decoders might in addition need other fields.
3751
 *            All decoders are designed to use the least fields possible though.
3752
 * @return On error a negative value is returned, otherwise the number of bytes
3753
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3754
 */
3755
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3756
                         int *frame_size_ptr,
3757
                         AVPacket *avpkt);
3758

    
3759
#if FF_API_VIDEO_OLD
3760
/**
3761
 * Decode a video frame from buf into picture.
3762
 * Wrapper function which calls avcodec_decode_video2.
3763
 *
3764
 * @deprecated Use avcodec_decode_video2 instead.
3765
 * @param avctx the codec context
3766
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3767
 * @param[in] buf the input buffer
3768
 * @param[in] buf_size the size of the input buffer in bytes
3769
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3770
 * @return On error a negative value is returned, otherwise the number of bytes
3771
 * used or zero if no frame could be decompressed.
3772
 */
3773
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3774
                         int *got_picture_ptr,
3775
                         const uint8_t *buf, int buf_size);
3776
#endif
3777

    
3778
/**
3779
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3780
 * Some decoders may support multiple frames in a single AVPacket, such
3781
 * decoders would then just decode the first frame.
3782
 *
3783
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3784
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3785
 * bits at once and could read over the end.
3786
 *
3787
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3788
 * no overreading happens for damaged MPEG streams.
3789
 *
3790
 * @note You might have to align the input buffer avpkt->data.
3791
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3792
 * necessary at all, on others it won't work at all if not aligned and on others
3793
 * it will work but it will have an impact on performance.
3794
 *
3795
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3796
 *
3797
 * @note Some codecs have a delay between input and output, these need to be
3798
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3799
 *
3800
 * @param avctx the codec context
3801
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3802
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3803
 *             allocate memory for the actual bitmap.
3804
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3805
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3806
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3807
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3808
 *
3809
 * @param[in] avpkt The input AVpacket containing the input buffer.
3810
 *            You can create such packet with av_init_packet() and by then setting
3811
 *            data and size, some decoders might in addition need other fields like
3812
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3813
 *            fields possible.
3814
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3815
 * @return On error a negative value is returned, otherwise the number of bytes
3816
 * used or zero if no frame could be decompressed.
3817
 */
3818
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3819
                         int *got_picture_ptr,
3820
                         AVPacket *avpkt);
3821

    
3822
#if FF_API_SUBTITLE_OLD
3823
/* Decode a subtitle message. Return -1 if error, otherwise return the
3824
 * number of bytes used. If no subtitle could be decompressed,
3825
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3826
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3827
                            int *got_sub_ptr,
3828
                            const uint8_t *buf, int buf_size);
3829
#endif
3830

    
3831
/**
3832
 * Decode a subtitle message.
3833
 * Return a negative value on error, otherwise return the number of bytes used.
3834
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3835
 * Otherwise, the subtitle is stored in *sub.
3836
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3837
 * simplicity, because the performance difference is expect to be negligible
3838
 * and reusing a get_buffer written for video codecs would probably perform badly
3839
 * due to a potentially very different allocation pattern.
3840
 *
3841
 * @param avctx the codec context
3842
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3843
                   freed with avsubtitle_free if *got_sub_ptr is set.
3844
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3845
 * @param[in] avpkt The input AVPacket containing the input buffer.
3846
 */
3847
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3848
                            int *got_sub_ptr,
3849
                            AVPacket *avpkt);
3850

    
3851
/**
3852
 * Frees all allocated data in the given subtitle struct.
3853
 *
3854
 * @param sub AVSubtitle to free.
3855
 */
3856
void avsubtitle_free(AVSubtitle *sub);
3857

    
3858
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3859
                        int *data_size_ptr,
3860
                        uint8_t *buf, int buf_size);
3861

    
3862
/**
3863
 * Encode an audio frame from samples into buf.
3864
 *
3865
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3866
 * However, for PCM audio the user will know how much space is needed
3867
 * because it depends on the value passed in buf_size as described
3868
 * below. In that case a lower value can be used.
3869
 *
3870
 * @param avctx the codec context
3871
 * @param[out] buf the output buffer
3872
 * @param[in] buf_size the output buffer size
3873
 * @param[in] samples the input buffer containing the samples
3874
 * The number of samples read from this buffer is frame_size*channels,
3875
 * both of which are defined in avctx.
3876
 * For PCM audio the number of samples read from samples is equal to
3877
 * buf_size * input_sample_size / output_sample_size.
3878
 * @return On error a negative value is returned, on success zero or the number
3879
 * of bytes used to encode the data read from the input buffer.
3880
 */
3881
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3882
                         const short *samples);
3883

    
3884
/**
3885
 * Encode a video frame from pict into buf.
3886
 * The input picture should be
3887
 * stored using a specific format, namely avctx.pix_fmt.
3888
 *
3889
 * @param avctx the codec context
3890
 * @param[out] buf the output buffer for the bitstream of encoded frame
3891
 * @param[in] buf_size the size of the output buffer in bytes
3892
 * @param[in] pict the input picture to encode
3893
 * @return On error a negative value is returned, on success zero or the number
3894
 * of bytes used from the output buffer.
3895
 */
3896
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3897
                         const AVFrame *pict);
3898
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3899
                            const AVSubtitle *sub);
3900

    
3901
int avcodec_close(AVCodecContext *avctx);
3902

    
3903
/**
3904
 * Register all the codecs, parsers and bitstream filters which were enabled at
3905
 * configuration time. If you do not call this function you can select exactly
3906
 * which formats you want to support, by using the individual registration
3907
 * functions.
3908
 *
3909
 * @see avcodec_register
3910
 * @see av_register_codec_parser
3911
 * @see av_register_bitstream_filter
3912
 */
3913
void avcodec_register_all(void);
3914

    
3915
/**
3916
 * Flush buffers, should be called when seeking or when switching to a different stream.
3917
 */
3918
void avcodec_flush_buffers(AVCodecContext *avctx);
3919

    
3920
void avcodec_default_free_buffers(AVCodecContext *s);
3921

    
3922
/* misc useful functions */
3923

    
3924
/**
3925
 * Return a single letter to describe the given picture type pict_type.
3926
 *
3927
 * @param[in] pict_type the picture type
3928
 * @return A single character representing the picture type.
3929
 */
3930
char av_get_pict_type_char(int pict_type);
3931

    
3932
/**
3933
 * Return codec bits per sample.
3934
 *
3935
 * @param[in] codec_id the codec
3936
 * @return Number of bits per sample or zero if unknown for the given codec.
3937
 */
3938
int av_get_bits_per_sample(enum CodecID codec_id);
3939

    
3940
#if FF_API_OLD_SAMPLE_FMT
3941
/**
3942
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3943
 */
3944
attribute_deprecated
3945
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3946
#endif
3947

    
3948
/* frame parsing */
3949
typedef struct AVCodecParserContext {
3950
    void *priv_data;
3951
    struct AVCodecParser *parser;
3952
    int64_t frame_offset; /* offset of the current frame */
3953
    int64_t cur_offset; /* current offset
3954
                           (incremented by each av_parser_parse()) */
3955
    int64_t next_frame_offset; /* offset of the next frame */
3956
    /* video info */
3957
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3958
    /**
3959
     * This field is used for proper frame duration computation in lavf.
3960
     * It signals, how much longer the frame duration of the current frame
3961
     * is compared to normal frame duration.
3962
     *
3963
     * frame_duration = (1 + repeat_pict) * time_base
3964
     *
3965
     * It is used by codecs like H.264 to display telecined material.
3966
     */
3967
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3968
    int64_t pts;     /* pts of the current frame */
3969
    int64_t dts;     /* dts of the current frame */
3970

    
3971
    /* private data */
3972
    int64_t last_pts;
3973
    int64_t last_dts;
3974
    int fetch_timestamp;
3975

    
3976
#define AV_PARSER_PTS_NB 4
3977
    int cur_frame_start_index;
3978
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3979
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3980
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3981

    
3982
    int flags;
3983
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3984
#define PARSER_FLAG_ONCE                      0x0002
3985
/// Set if the parser has a valid file offset
3986
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3987

    
3988
    int64_t offset;      ///< byte offset from starting packet start
3989
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3990

    
3991
    /*!
3992
     * Set by parser to 1 for key frames and 0 for non-key frames.
3993
     * It is initialized to -1, so if the parser doesn't set this flag,
3994
     * old-style fallback using FF_I_TYPE picture type as key frames
3995
     * will be used.
3996
     */
3997
    int key_frame;
3998

    
3999
    /**
4000
     * Time difference in stream time base units from the pts of this
4001
     * packet to the point at which the output from the decoder has converged
4002
     * independent from the availability of previous frames. That is, the
4003
     * frames are virtually identical no matter if decoding started from
4004
     * the very first frame or from this keyframe.
4005
     * Is AV_NOPTS_VALUE if unknown.
4006
     * This field is not the display duration of the current frame.
4007
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
4008
     * set.
4009
     *
4010
     * The purpose of this field is to allow seeking in streams that have no
4011
     * keyframes in the conventional sense. It corresponds to the
4012
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
4013
     * essential for some types of subtitle streams to ensure that all
4014
     * subtitles are correctly displayed after seeking.
4015
     */
4016
    int64_t convergence_duration;
4017

    
4018
    // Timestamp generation support:
4019
    /**
4020
     * Synchronization point for start of timestamp generation.
4021
     *
4022
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
4023
     * (default).
4024
     *
4025
     * For example, this corresponds to presence of H.264 buffering period
4026
     * SEI message.
4027
     */
4028
    int dts_sync_point;
4029

    
4030
    /**
4031
     * Offset of the current timestamp against last timestamp sync point in
4032
     * units of AVCodecContext.time_base.
4033
     *
4034
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4035
     * contain a valid timestamp offset.
4036
     *
4037
     * Note that the timestamp of sync point has usually a nonzero
4038
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
4039
     * the next frame after timestamp sync point will be usually 1.
4040
     *
4041
     * For example, this corresponds to H.264 cpb_removal_delay.
4042
     */
4043
    int dts_ref_dts_delta;
4044

    
4045
    /**
4046
     * Presentation delay of current frame in units of AVCodecContext.time_base.
4047
     *
4048
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
4049
     * contain valid non-negative timestamp delta (presentation time of a frame
4050
     * must not lie in the past).
4051
     *
4052
     * This delay represents the difference between decoding and presentation
4053
     * time of the frame.
4054
     *
4055
     * For example, this corresponds to H.264 dpb_output_delay.
4056
     */
4057
    int pts_dts_delta;
4058

    
4059
    /**
4060
     * Position of the packet in file.
4061
     *
4062
     * Analogous to cur_frame_pts/dts
4063
     */
4064
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
4065

    
4066
    /**
4067
     * Byte position of currently parsed frame in stream.
4068
     */
4069
    int64_t pos;
4070

    
4071
    /**
4072
     * Previous frame byte position.
4073
     */
4074
    int64_t last_pos;
4075
} AVCodecParserContext;
4076

    
4077
typedef struct AVCodecParser {
4078
    int codec_ids[5]; /* several codec IDs are permitted */
4079
    int priv_data_size;
4080
    int (*parser_init)(AVCodecParserContext *s);
4081
    int (*parser_parse)(AVCodecParserContext *s,
4082
                        AVCodecContext *avctx,
4083
                        const uint8_t **poutbuf, int *poutbuf_size,
4084
                        const uint8_t *buf, int buf_size);
4085
    void (*parser_close)(AVCodecParserContext *s);
4086
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
4087
    struct AVCodecParser *next;
4088
} AVCodecParser;
4089

    
4090
AVCodecParser *av_parser_next(AVCodecParser *c);
4091

    
4092
void av_register_codec_parser(AVCodecParser *parser);
4093
AVCodecParserContext *av_parser_init(int codec_id);
4094

    
4095
#if LIBAVCODEC_VERSION_MAJOR < 53
4096
attribute_deprecated
4097
int av_parser_parse(AVCodecParserContext *s,
4098
                    AVCodecContext *avctx,
4099
                    uint8_t **poutbuf, int *poutbuf_size,
4100
                    const uint8_t *buf, int buf_size,
4101
                    int64_t pts, int64_t dts);
4102
#endif
4103

    
4104
/**
4105
 * Parse a packet.
4106
 *
4107
 * @param s             parser context.
4108
 * @param avctx         codec context.
4109
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4110
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4111
 * @param buf           input buffer.
4112
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4113
 * @param pts           input presentation timestamp.
4114
 * @param dts           input decoding timestamp.
4115
 * @param pos           input byte position in stream.
4116
 * @return the number of bytes of the input bitstream used.
4117
 *
4118
 * Example:
4119
 * @code
4120
 *   while(in_len){
4121
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4122
 *                                        in_data, in_len,
4123
 *                                        pts, dts, pos);
4124
 *       in_data += len;
4125
 *       in_len  -= len;
4126
 *
4127
 *       if(size)
4128
 *          decode_frame(data, size);
4129
 *   }
4130
 * @endcode
4131
 */
4132
int av_parser_parse2(AVCodecParserContext *s,
4133
                     AVCodecContext *avctx,
4134
                     uint8_t **poutbuf, int *poutbuf_size,
4135
                     const uint8_t *buf, int buf_size,
4136
                     int64_t pts, int64_t dts,
4137
                     int64_t pos);
4138

    
4139
int av_parser_change(AVCodecParserContext *s,
4140
                     AVCodecContext *avctx,
4141
                     uint8_t **poutbuf, int *poutbuf_size,
4142
                     const uint8_t *buf, int buf_size, int keyframe);
4143
void av_parser_close(AVCodecParserContext *s);
4144

    
4145

    
4146
typedef struct AVBitStreamFilterContext {
4147
    void *priv_data;
4148
    struct AVBitStreamFilter *filter;
4149
    AVCodecParserContext *parser;
4150
    struct AVBitStreamFilterContext *next;
4151
} AVBitStreamFilterContext;
4152

    
4153

    
4154
typedef struct AVBitStreamFilter {
4155
    const char *name;
4156
    int priv_data_size;
4157
    int (*filter)(AVBitStreamFilterContext *bsfc,
4158
                  AVCodecContext *avctx, const char *args,
4159
                  uint8_t **poutbuf, int *poutbuf_size,
4160
                  const uint8_t *buf, int buf_size, int keyframe);
4161
    void (*close)(AVBitStreamFilterContext *bsfc);
4162
    struct AVBitStreamFilter *next;
4163
} AVBitStreamFilter;
4164

    
4165
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4166
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4167
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4168
                               AVCodecContext *avctx, const char *args,
4169
                               uint8_t **poutbuf, int *poutbuf_size,
4170
                               const uint8_t *buf, int buf_size, int keyframe);
4171
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4172

    
4173
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4174

    
4175
/* memory */
4176

    
4177
/**
4178
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4179
 *
4180
 * @see av_realloc
4181
 */
4182
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4183

    
4184
/**
4185
 * Allocate a buffer, reusing the given one if large enough.
4186
 *
4187
 * Contrary to av_fast_realloc the current buffer contents might not be
4188
 * preserved and on error the old buffer is freed, thus no special
4189
 * handling to avoid memleaks is necessary.
4190
 *
4191
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4192
 * @param size size of the buffer *ptr points to
4193
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4194
 *                 *size 0 if an error occurred.
4195
 */
4196
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4197

    
4198
#if LIBAVCODEC_VERSION_MAJOR < 53
4199
/**
4200
 * @deprecated Deprecated in favor of av_image_copy().
4201
 */
4202
attribute_deprecated
4203
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4204
                          uint8_t *src_data[4], int src_linesize[4],
4205
                          enum PixelFormat pix_fmt, int width, int height);
4206
#endif
4207

    
4208
/**
4209
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4210
 */
4211
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4212
                     enum PixelFormat pix_fmt, int width, int height);
4213

    
4214
/**
4215
 * Crop image top and left side.
4216
 */
4217
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4218
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4219

    
4220
/**
4221
 * Pad image.
4222
 */
4223
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4224
            int padtop, int padbottom, int padleft, int padright, int *color);
4225

    
4226
/**
4227
 * Encode extradata length to a buffer. Used by xiph codecs.
4228
 *
4229
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4230
 * @param v size of extradata in bytes
4231
 * @return number of bytes written to the buffer.
4232
 */
4233
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4234

    
4235
#if LIBAVCODEC_VERSION_MAJOR < 53
4236
/**
4237
 * Parse str and put in width_ptr and height_ptr the detected values.
4238
 *
4239
 * @deprecated Deprecated in favor of av_parse_video_size().
4240
 */
4241
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4242

    
4243
/**
4244
 * Parse str and store the detected values in *frame_rate.
4245
 *
4246
 * @deprecated Deprecated in favor of av_parse_video_rate().
4247
 */
4248
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4249
#endif
4250

    
4251
/**
4252
 * Logs a generic warning message about a missing feature. This function is
4253
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4254
 * only, and would normally not be used by applications.
4255
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4256
 * a pointer to an AVClass struct
4257
 * @param[in] feature string containing the name of the missing feature
4258
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4259
 * If want_sample is non-zero, additional verbage will be added to the log
4260
 * message which tells the user how to report samples to the development
4261
 * mailing list.
4262
 */
4263
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4264

    
4265
/**
4266
 * Log a generic warning message asking for a sample. This function is
4267
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4268
 * only, and would normally not be used by applications.
4269
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4270
 * a pointer to an AVClass struct
4271
 * @param[in] msg string containing an optional message, or NULL if no message
4272
 */
4273
void av_log_ask_for_sample(void *avc, const char *msg);
4274

    
4275
/**
4276
 * Register the hardware accelerator hwaccel.
4277
 */
4278
void av_register_hwaccel(AVHWAccel *hwaccel);
4279

    
4280
/**
4281
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4282
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4283
 * after hwaccel, or NULL if hwaccel is the last one.
4284
 */
4285
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4286

    
4287

    
4288
/**
4289
 * Lock operation used by lockmgr
4290
 */
4291
enum AVLockOp {
4292
  AV_LOCK_CREATE,  ///< Create a mutex
4293
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4294
  AV_LOCK_RELEASE, ///< Unlock the mutex
4295
  AV_LOCK_DESTROY, ///< Free mutex resources
4296
};
4297

    
4298
/**
4299
 * Register a user provided lock manager supporting the operations
4300
 * specified by AVLockOp. mutex points to a (void *) where the
4301
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4302
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4303
 *
4304
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4305
 *           callback during the call to av_lockmgr_register().
4306
 *           Thus, the application must be prepared to handle that.
4307
 *           If cb is set to NULL the lockmgr will be unregistered.
4308
 *           Also note that during unregistration the previously registered
4309
 *           lockmgr callback may also be invoked.
4310
 */
4311
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4312

    
4313
#endif /* AVCODEC_AVCODEC_H */