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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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 * @file
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 * external API header
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 */
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#include <errno.h>
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#include "libavcore/samplefmt.h"
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#include "libavutil/avutil.h"
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#include "libavutil/cpu.h"
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#define LIBAVCODEC_VERSION_MAJOR 52
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#define LIBAVCODEC_VERSION_MINOR 110
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#define LIBAVCODEC_VERSION_MICRO  0
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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                                               LIBAVCODEC_VERSION_MINOR, \
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                                               LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
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                                           LIBAVCODEC_VERSION_MINOR,    \
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                                           LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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/**
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 * Those FF_API_* defines are not part of public API.
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 * They may change, break or disappear at any time.
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 */
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#ifndef FF_API_PALETTE_CONTROL
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#define FF_API_PALETTE_CONTROL  (LIBAVCODEC_VERSION_MAJOR < 54)
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#endif
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#ifndef FF_API_MM_FLAGS
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#define FF_API_MM_FLAGS         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OPT_SHOW
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#define FF_API_OPT_SHOW         (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_AUDIO_OLD
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#define FF_API_AUDIO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_VIDEO_OLD
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#define FF_API_VIDEO_OLD        (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SUBTITLE_OLD
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#define FF_API_SUBTITLE_OLD     (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_USE_LPC
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#define FF_API_USE_LPC          (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_SET_STRING_OLD
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#define FF_API_SET_STRING_OLD   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_INOFFICIAL
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#define FF_API_INOFFICIAL       (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_SAMPLE_FMT
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#define FF_API_OLD_SAMPLE_FMT   (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#ifndef FF_API_OLD_AUDIOCONVERT
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#define FF_API_OLD_AUDIOCONVERT (LIBAVCODEC_VERSION_MAJOR < 53)
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#endif
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#if LIBAVCODEC_VERSION_MAJOR < 53
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#   define FF_INTERNALC_MEM_TYPE unsigned int
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#else
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#   define FF_INTERNALC_MEM_TYPE size_t
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#endif
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/**
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 * Identify the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. it is as close as possible to similar codecs.
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 */
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enum CodecID {
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    CODEC_ID_NONE,
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    /* video codecs */
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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    CODEC_ID_MPEG2VIDEO_XVMC,
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    CODEC_ID_H261,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_RV20,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MJPEGB,
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    CODEC_ID_LJPEG,
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    CODEC_ID_SP5X,
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    CODEC_ID_JPEGLS,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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    CODEC_ID_WMV2,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    CODEC_ID_FLV1,
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    CODEC_ID_SVQ1,
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    CODEC_ID_SVQ3,
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    CODEC_ID_DVVIDEO,
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    CODEC_ID_HUFFYUV,
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    CODEC_ID_CYUV,
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    CODEC_ID_H264,
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    CODEC_ID_INDEO3,
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    CODEC_ID_VP3,
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    CODEC_ID_THEORA,
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    CODEC_ID_ASV1,
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    CODEC_ID_ASV2,
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    CODEC_ID_FFV1,
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    CODEC_ID_4XM,
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    CODEC_ID_VCR1,
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    CODEC_ID_CLJR,
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    CODEC_ID_MDEC,
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    CODEC_ID_ROQ,
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    CODEC_ID_INTERPLAY_VIDEO,
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    CODEC_ID_XAN_WC3,
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    CODEC_ID_XAN_WC4,
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    CODEC_ID_RPZA,
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    CODEC_ID_CINEPAK,
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    CODEC_ID_WS_VQA,
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    CODEC_ID_MSRLE,
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    CODEC_ID_MSVIDEO1,
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    CODEC_ID_IDCIN,
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    CODEC_ID_8BPS,
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    CODEC_ID_SMC,
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    CODEC_ID_FLIC,
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    CODEC_ID_TRUEMOTION1,
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    CODEC_ID_VMDVIDEO,
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    CODEC_ID_MSZH,
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    CODEC_ID_ZLIB,
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    CODEC_ID_QTRLE,
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    CODEC_ID_SNOW,
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    CODEC_ID_TSCC,
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    CODEC_ID_ULTI,
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    CODEC_ID_QDRAW,
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    CODEC_ID_VIXL,
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    CODEC_ID_QPEG,
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#if LIBAVCODEC_VERSION_MAJOR < 53
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    CODEC_ID_XVID,
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#endif
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    CODEC_ID_PNG,
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    CODEC_ID_PPM,
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    CODEC_ID_PBM,
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    CODEC_ID_PGM,
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    CODEC_ID_PGMYUV,
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    CODEC_ID_PAM,
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    CODEC_ID_FFVHUFF,
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    CODEC_ID_RV30,
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    CODEC_ID_RV40,
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    CODEC_ID_VC1,
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    CODEC_ID_WMV3,
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    CODEC_ID_LOCO,
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    CODEC_ID_WNV1,
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    CODEC_ID_AASC,
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    CODEC_ID_INDEO2,
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    CODEC_ID_FRAPS,
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    CODEC_ID_TRUEMOTION2,
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    CODEC_ID_BMP,
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    CODEC_ID_CSCD,
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    CODEC_ID_MMVIDEO,
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    CODEC_ID_ZMBV,
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    CODEC_ID_AVS,
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    CODEC_ID_SMACKVIDEO,
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    CODEC_ID_NUV,
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    CODEC_ID_KMVC,
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    CODEC_ID_FLASHSV,
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    CODEC_ID_CAVS,
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    CODEC_ID_JPEG2000,
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    CODEC_ID_VMNC,
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    CODEC_ID_VP5,
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    CODEC_ID_VP6,
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    CODEC_ID_VP6F,
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    CODEC_ID_TARGA,
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    CODEC_ID_DSICINVIDEO,
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    CODEC_ID_TIERTEXSEQVIDEO,
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    CODEC_ID_TIFF,
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    CODEC_ID_GIF,
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    CODEC_ID_FFH264,
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    CODEC_ID_DXA,
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    CODEC_ID_DNXHD,
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    CODEC_ID_THP,
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    CODEC_ID_SGI,
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    CODEC_ID_C93,
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    CODEC_ID_BETHSOFTVID,
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    CODEC_ID_PTX,
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    CODEC_ID_TXD,
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    CODEC_ID_VP6A,
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    CODEC_ID_AMV,
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    CODEC_ID_VB,
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    CODEC_ID_PCX,
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    CODEC_ID_SUNRAST,
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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    CODEC_ID_RL2,
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    CODEC_ID_8SVX_EXP,
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    CODEC_ID_8SVX_FIB,
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    CODEC_ID_ESCAPE124,
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    CODEC_ID_DIRAC,
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    CODEC_ID_BFI,
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    CODEC_ID_CMV,
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    CODEC_ID_MOTIONPIXELS,
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    CODEC_ID_TGV,
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    CODEC_ID_TGQ,
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    CODEC_ID_TQI,
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    CODEC_ID_AURA,
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    CODEC_ID_AURA2,
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    CODEC_ID_V210X,
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    CODEC_ID_TMV,
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    CODEC_ID_V210,
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    CODEC_ID_DPX,
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    CODEC_ID_MAD,
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    CODEC_ID_FRWU,
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    CODEC_ID_FLASHSV2,
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    CODEC_ID_CDGRAPHICS,
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    CODEC_ID_R210,
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    CODEC_ID_ANM,
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    CODEC_ID_BINKVIDEO,
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    CODEC_ID_IFF_ILBM,
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    CODEC_ID_IFF_BYTERUN1,
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    CODEC_ID_KGV1,
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    CODEC_ID_YOP,
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    CODEC_ID_VP8,
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    CODEC_ID_PICTOR,
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    CODEC_ID_ANSI,
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    CODEC_ID_A64_MULTI,
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    CODEC_ID_A64_MULTI5,
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    CODEC_ID_R10K,
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    CODEC_ID_MXPEG,
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    CODEC_ID_LAGARITH,
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    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 "libavcore/audioconvert.h"
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/* Audio channel masks */
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#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. */
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#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
//The following defines may change, don't expect compatibility if you use them.
733
#define MB_TYPE_INTRA4x4   0x0001
734
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
735
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
736
#define MB_TYPE_16x16      0x0008
737
#define MB_TYPE_16x8       0x0010
738
#define MB_TYPE_8x16       0x0020
739
#define MB_TYPE_8x8        0x0040
740
#define MB_TYPE_INTERLACED 0x0080
741
#define MB_TYPE_DIRECT2    0x0100 //FIXME
742
#define MB_TYPE_ACPRED     0x0200
743
#define MB_TYPE_GMC        0x0400
744
#define MB_TYPE_SKIP       0x0800
745
#define MB_TYPE_P0L0       0x1000
746
#define MB_TYPE_P1L0       0x2000
747
#define MB_TYPE_P0L1       0x4000
748
#define MB_TYPE_P1L1       0x8000
749
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
750
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
751
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
752
#define MB_TYPE_QUANT      0x00010000
753
#define MB_TYPE_CBP        0x00020000
754
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
755

    
756
/**
757
 * Pan Scan area.
758
 * This specifies the area which should be displayed.
759
 * Note there may be multiple such areas for one frame.
760
 */
761
typedef struct AVPanScan{
762
    /**
763
     * id
764
     * - encoding: Set by user.
765
     * - decoding: Set by libavcodec.
766
     */
767
    int id;
768

    
769
    /**
770
     * width and height in 1/16 pel
771
     * - encoding: Set by user.
772
     * - decoding: Set by libavcodec.
773
     */
774
    int width;
775
    int height;
776

    
777
    /**
778
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
779
     * - encoding: Set by user.
780
     * - decoding: Set by libavcodec.
781
     */
782
    int16_t position[3][2];
783
}AVPanScan;
784

    
785
#define FF_COMMON_FRAME \
786
    /**\
787
     * pointer to the picture planes.\
788
     * This might be different from the first allocated byte\
789
     * - encoding: \
790
     * - decoding: \
791
     */\
792
    uint8_t *data[4];\
793
    int linesize[4];\
794
    /**\
795
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
796
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
797
     * - encoding: \
798
     * - decoding: \
799
     */\
800
    uint8_t *base[4];\
801
    /**\
802
     * 1 -> keyframe, 0-> not\
803
     * - encoding: Set by libavcodec.\
804
     * - decoding: Set by libavcodec.\
805
     */\
806
    int key_frame;\
807
\
808
    /**\
809
     * Picture type of the frame, see ?_TYPE below.\
810
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
811
     * - decoding: Set by libavcodec.\
812
     */\
813
    int pict_type;\
814
\
815
    /**\
816
     * presentation timestamp in time_base units (time when frame should be shown to user)\
817
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
818
     * - encoding: MUST be set by user.\
819
     * - decoding: Set by libavcodec.\
820
     */\
821
    int64_t pts;\
822
\
823
    /**\
824
     * picture number in bitstream order\
825
     * - encoding: set by\
826
     * - decoding: Set by libavcodec.\
827
     */\
828
    int coded_picture_number;\
829
    /**\
830
     * picture number in display order\
831
     * - encoding: set by\
832
     * - decoding: Set by libavcodec.\
833
     */\
834
    int display_picture_number;\
835
\
836
    /**\
837
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
838
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
839
     * - decoding: Set by libavcodec.\
840
     */\
841
    int quality; \
842
\
843
    /**\
844
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
845
     * Set to INT_MAX if the buffer has not been used yet.\
846
     * - encoding: unused\
847
     * - decoding: MUST be set by get_buffer().\
848
     */\
849
    int age;\
850
\
851
    /**\
852
     * is this picture used as reference\
853
     * The values for this are the same as the MpegEncContext.picture_structure\
854
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
855
     * Set to 4 for delayed, non-reference frames.\
856
     * - encoding: unused\
857
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
858
     */\
859
    int reference;\
860
\
861
    /**\
862
     * QP table\
863
     * - encoding: unused\
864
     * - decoding: Set by libavcodec.\
865
     */\
866
    int8_t *qscale_table;\
867
    /**\
868
     * QP store stride\
869
     * - encoding: unused\
870
     * - decoding: Set by libavcodec.\
871
     */\
872
    int qstride;\
873
\
874
    /**\
875
     * mbskip_table[mb]>=1 if MB didn't change\
876
     * stride= mb_width = (width+15)>>4\
877
     * - encoding: unused\
878
     * - decoding: Set by libavcodec.\
879
     */\
880
    uint8_t *mbskip_table;\
881
\
882
    /**\
883
     * motion vector table\
884
     * @code\
885
     * example:\
886
     * int mv_sample_log2= 4 - motion_subsample_log2;\
887
     * int mb_width= (width+15)>>4;\
888
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
889
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
890
     * @endcode\
891
     * - encoding: Set by user.\
892
     * - decoding: Set by libavcodec.\
893
     */\
894
    int16_t (*motion_val[2])[2];\
895
\
896
    /**\
897
     * macroblock type table\
898
     * mb_type_base + mb_width + 2\
899
     * - encoding: Set by user.\
900
     * - decoding: Set by libavcodec.\
901
     */\
902
    uint32_t *mb_type;\
903
\
904
    /**\
905
     * log2 of the size of the block which a single vector in motion_val represents: \
906
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
907
     * - encoding: unused\
908
     * - decoding: Set by libavcodec.\
909
     */\
910
    uint8_t motion_subsample_log2;\
911
\
912
    /**\
913
     * for some private data of the user\
914
     * - encoding: unused\
915
     * - decoding: Set by user.\
916
     */\
917
    void *opaque;\
918
\
919
    /**\
920
     * error\
921
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
922
     * - decoding: unused\
923
     */\
924
    uint64_t error[4];\
925
\
926
    /**\
927
     * type of the buffer (to keep track of who has to deallocate data[*])\
928
     * - encoding: Set by the one who allocates it.\
929
     * - decoding: Set by the one who allocates it.\
930
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
931
     */\
932
    int type;\
933
    \
934
    /**\
935
     * When decoding, this signals how much the picture must be delayed.\
936
     * extra_delay = repeat_pict / (2*fps)\
937
     * - encoding: unused\
938
     * - decoding: Set by libavcodec.\
939
     */\
940
    int repeat_pict;\
941
    \
942
    /**\
943
     * \
944
     */\
945
    int qscale_type;\
946
    \
947
    /**\
948
     * The content of the picture is interlaced.\
949
     * - encoding: Set by user.\
950
     * - decoding: Set by libavcodec. (default 0)\
951
     */\
952
    int interlaced_frame;\
953
    \
954
    /**\
955
     * If the content is interlaced, is top field displayed first.\
956
     * - encoding: Set by user.\
957
     * - decoding: Set by libavcodec.\
958
     */\
959
    int top_field_first;\
960
    \
961
    /**\
962
     * Pan scan.\
963
     * - encoding: Set by user.\
964
     * - decoding: Set by libavcodec.\
965
     */\
966
    AVPanScan *pan_scan;\
967
    \
968
    /**\
969
     * Tell user application that palette has changed from previous frame.\
970
     * - encoding: ??? (no palette-enabled encoder yet)\
971
     * - decoding: Set by libavcodec. (default 0).\
972
     */\
973
    int palette_has_changed;\
974
    \
975
    /**\
976
     * codec suggestion on buffer type if != 0\
977
     * - encoding: unused\
978
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
979
     */\
980
    int buffer_hints;\
981
\
982
    /**\
983
     * DCT coefficients\
984
     * - encoding: unused\
985
     * - decoding: Set by libavcodec.\
986
     */\
987
    short *dct_coeff;\
988
\
989
    /**\
990
     * motion reference frame index\
991
     * the order in which these are stored can depend on the codec.\
992
     * - encoding: Set by user.\
993
     * - decoding: Set by libavcodec.\
994
     */\
995
    int8_t *ref_index[2];\
996
\
997
    /**\
998
     * reordered opaque 64bit (generally an integer or a double precision float\
999
     * PTS but can be anything). \
1000
     * The user sets AVCodecContext.reordered_opaque to represent the input at\
1001
     * that time,\
1002
     * the decoder reorders values as needed and sets AVFrame.reordered_opaque\
1003
     * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \
1004
     * @deprecated in favor of pkt_pts\
1005
     * - encoding: unused\
1006
     * - decoding: Read by user.\
1007
     */\
1008
    int64_t reordered_opaque;\
1009
\
1010
    /**\
1011
     * hardware accelerator private data (FFmpeg allocated)\
1012
     * - encoding: unused\
1013
     * - decoding: Set by libavcodec\
1014
     */\
1015
    void *hwaccel_picture_private;\
1016
\
1017
    /**\
1018
     * reordered pts from the last AVPacket that has been input into the decoder\
1019
     * - encoding: unused\
1020
     * - decoding: Read by user.\
1021
     */\
1022
    int64_t pkt_pts;\
1023
\
1024
    /**\
1025
     * dts from the last AVPacket that has been input into the decoder\
1026
     * - encoding: unused\
1027
     * - decoding: Read by user.\
1028
     */\
1029
    int64_t pkt_dts;\
1030
\
1031
    /**\
1032
     * frame timestamp estimated using various heuristics, in stream time base\
1033
     * - encoding: unused\
1034
     * - decoding: set by libavcodec, read by user.\
1035
     */\
1036
    int64_t best_effort_timestamp;\
1037

    
1038

    
1039
#define FF_QSCALE_TYPE_MPEG1 0
1040
#define FF_QSCALE_TYPE_MPEG2 1
1041
#define FF_QSCALE_TYPE_H264  2
1042
#define FF_QSCALE_TYPE_VP56  3
1043

    
1044
#define FF_BUFFER_TYPE_INTERNAL 1
1045
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
1046
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
1047
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
1048

    
1049

    
1050
#define FF_I_TYPE  1 ///< Intra
1051
#define FF_P_TYPE  2 ///< Predicted
1052
#define FF_B_TYPE  3 ///< Bi-dir predicted
1053
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
1054
#define FF_SI_TYPE 5 ///< Switching Intra
1055
#define FF_SP_TYPE 6 ///< Switching Predicted
1056
#define FF_BI_TYPE 7
1057

    
1058
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
1059
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
1060
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
1061
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
1062

    
1063
typedef struct AVPacket {
1064
    /**
1065
     * Presentation timestamp in AVStream->time_base units; the time at which
1066
     * the decompressed packet will be presented to the user.
1067
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1068
     * pts MUST be larger or equal to dts as presentation cannot happen before
1069
     * decompression, unless one wants to view hex dumps. Some formats misuse
1070
     * the terms dts and pts/cts to mean something different. Such timestamps
1071
     * must be converted to true pts/dts before they are stored in AVPacket.
1072
     */
1073
    int64_t pts;
1074
    /**
1075
     * Decompression timestamp in AVStream->time_base units; the time at which
1076
     * the packet is decompressed.
1077
     * Can be AV_NOPTS_VALUE if it is not stored in the file.
1078
     */
1079
    int64_t dts;
1080
    uint8_t *data;
1081
    int   size;
1082
    int   stream_index;
1083
    int   flags;
1084
    /**
1085
     * Duration of this packet in AVStream->time_base units, 0 if unknown.
1086
     * Equals next_pts - this_pts in presentation order.
1087
     */
1088
    int   duration;
1089
    void  (*destruct)(struct AVPacket *);
1090
    void  *priv;
1091
    int64_t pos;                            ///< byte position in stream, -1 if unknown
1092

    
1093
    /**
1094
     * Time difference in AVStream->time_base units from the pts of this
1095
     * packet to the point at which the output from the decoder has converged
1096
     * independent from the availability of previous frames. That is, the
1097
     * frames are virtually identical no matter if decoding started from
1098
     * the very first frame or from this keyframe.
1099
     * Is AV_NOPTS_VALUE if unknown.
1100
     * This field is not the display duration of the current packet.
1101
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
1102
     * set.
1103
     *
1104
     * The purpose of this field is to allow seeking in streams that have no
1105
     * keyframes in the conventional sense. It corresponds to the
1106
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
1107
     * essential for some types of subtitle streams to ensure that all
1108
     * subtitles are correctly displayed after seeking.
1109
     */
1110
    int64_t convergence_duration;
1111
} AVPacket;
1112
#define AV_PKT_FLAG_KEY   0x0001
1113
#if LIBAVCODEC_VERSION_MAJOR < 53
1114
#define PKT_FLAG_KEY AV_PKT_FLAG_KEY
1115
#endif
1116

    
1117
/**
1118
 * Audio Video Frame.
1119
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
1120
 * bumps.
1121
 * Removal, reordering and changes to existing fields require a major
1122
 * version bump. No fields should be added into AVFrame before or after
1123
 * FF_COMMON_FRAME!
1124
 * sizeof(AVFrame) must not be used outside libav*.
1125
 */
1126
typedef struct AVFrame {
1127
    FF_COMMON_FRAME
1128
} AVFrame;
1129

    
1130
/**
1131
 * main external API structure.
1132
 * New fields can be added to the end with minor version bumps.
1133
 * Removal, reordering and changes to existing fields require a major
1134
 * version bump.
1135
 * sizeof(AVCodecContext) must not be used outside libav*.
1136
 */
1137
typedef struct AVCodecContext {
1138
    /**
1139
     * information on struct for av_log
1140
     * - set by avcodec_alloc_context
1141
     */
1142
    const AVClass *av_class;
1143
    /**
1144
     * the average bitrate
1145
     * - encoding: Set by user; unused for constant quantizer encoding.
1146
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
1147
     */
1148
    int bit_rate;
1149

    
1150
    /**
1151
     * number of bits the bitstream is allowed to diverge from the reference.
1152
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
1153
     * - encoding: Set by user; unused for constant quantizer encoding.
1154
     * - decoding: unused
1155
     */
1156
    int bit_rate_tolerance;
1157

    
1158
    /**
1159
     * CODEC_FLAG_*.
1160
     * - encoding: Set by user.
1161
     * - decoding: Set by user.
1162
     */
1163
    int flags;
1164

    
1165
    /**
1166
     * Some codecs need additional format info. It is stored here.
1167
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
1168
     * specific codec MUST set it correctly otherwise stream copy breaks.
1169
     * In general use of this field by muxers is not recommanded.
1170
     * - encoding: Set by libavcodec.
1171
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
1172
     */
1173
    int sub_id;
1174

    
1175
    /**
1176
     * Motion estimation algorithm used for video coding.
1177
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
1178
     * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
1179
     * - encoding: MUST be set by user.
1180
     * - decoding: unused
1181
     */
1182
    int me_method;
1183

    
1184
    /**
1185
     * some codecs need / can use extradata like Huffman tables.
1186
     * mjpeg: Huffman tables
1187
     * rv10: additional flags
1188
     * mpeg4: global headers (they can be in the bitstream or here)
1189
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
1190
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
1191
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1192
     * - encoding: Set/allocated/freed by libavcodec.
1193
     * - decoding: Set/allocated/freed by user.
1194
     */
1195
    uint8_t *extradata;
1196
    int extradata_size;
1197

    
1198
    /**
1199
     * This is the fundamental unit of time (in seconds) in terms
1200
     * of which frame timestamps are represented. For fixed-fps content,
1201
     * timebase should be 1/framerate and timestamp increments should be
1202
     * identically 1.
1203
     * - encoding: MUST be set by user.
1204
     * - decoding: Set by libavcodec.
1205
     */
1206
    AVRational time_base;
1207

    
1208
    /* video only */
1209
    /**
1210
     * picture width / height.
1211
     * - encoding: MUST be set by user.
1212
     * - decoding: Set by libavcodec.
1213
     * Note: For compatibility it is possible to set this instead of
1214
     * coded_width/height before decoding.
1215
     */
1216
    int width, height;
1217

    
1218
#define FF_ASPECT_EXTENDED 15
1219

    
1220
    /**
1221
     * the number of pictures in a group of pictures, or 0 for intra_only
1222
     * - encoding: Set by user.
1223
     * - decoding: unused
1224
     */
1225
    int gop_size;
1226

    
1227
    /**
1228
     * Pixel format, see PIX_FMT_xxx.
1229
     * May be set by the demuxer if known from headers.
1230
     * May be overriden by the decoder if it knows better.
1231
     * - encoding: Set by user.
1232
     * - decoding: Set by user if known, overridden by libavcodec if known
1233
     */
1234
    enum PixelFormat pix_fmt;
1235

    
1236
    /**
1237
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
1238
     * has to read frames at native frame rate.
1239
     * - encoding: Set by user.
1240
     * - decoding: unused
1241
     */
1242
    int rate_emu;
1243

    
1244
    /**
1245
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
1246
     * decoder to draw a horizontal band. It improves cache usage. Not
1247
     * all codecs can do that. You must check the codec capabilities
1248
     * beforehand.
1249
     * The function is also used by hardware acceleration APIs.
1250
     * It is called at least once during frame decoding to pass
1251
     * the data needed for hardware render.
1252
     * In that mode instead of pixel data, AVFrame points to
1253
     * a structure specific to the acceleration API. The application
1254
     * reads the structure and can change some fields to indicate progress
1255
     * or mark state.
1256
     * - encoding: unused
1257
     * - decoding: Set by user.
1258
     * @param height the height of the slice
1259
     * @param y the y position of the slice
1260
     * @param type 1->top field, 2->bottom field, 3->frame
1261
     * @param offset offset into the AVFrame.data from which the slice should be read
1262
     */
1263
    void (*draw_horiz_band)(struct AVCodecContext *s,
1264
                            const AVFrame *src, int offset[4],
1265
                            int y, int type, int height);
1266

    
1267
    /* audio only */
1268
    int sample_rate; ///< samples per second
1269
    int channels;    ///< number of audio channels
1270

    
1271
    /**
1272
     * audio sample format
1273
     * - encoding: Set by user.
1274
     * - decoding: Set by libavcodec.
1275
     */
1276
    enum AVSampleFormat sample_fmt;  ///< sample format
1277

    
1278
    /* The following data should not be initialized. */
1279
    /**
1280
     * Samples per packet, initialized when calling 'init'.
1281
     */
1282
    int frame_size;
1283
    int frame_number;   ///< audio or video frame number
1284
#if LIBAVCODEC_VERSION_MAJOR < 53
1285
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
1286
#endif
1287

    
1288
    /**
1289
     * Number of frames the decoded output will be delayed relative to
1290
     * the encoded input.
1291
     * - encoding: Set by libavcodec.
1292
     * - decoding: unused
1293
     */
1294
    int delay;
1295

    
1296
    /* - encoding parameters */
1297
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
1298
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
1299

    
1300
    /**
1301
     * minimum quantizer
1302
     * - encoding: Set by user.
1303
     * - decoding: unused
1304
     */
1305
    int qmin;
1306

    
1307
    /**
1308
     * maximum quantizer
1309
     * - encoding: Set by user.
1310
     * - decoding: unused
1311
     */
1312
    int qmax;
1313

    
1314
    /**
1315
     * maximum quantizer difference between frames
1316
     * - encoding: Set by user.
1317
     * - decoding: unused
1318
     */
1319
    int max_qdiff;
1320

    
1321
    /**
1322
     * maximum number of B-frames between non-B-frames
1323
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
1324
     * - encoding: Set by user.
1325
     * - decoding: unused
1326
     */
1327
    int max_b_frames;
1328

    
1329
    /**
1330
     * qscale factor between IP and B-frames
1331
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1332
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1333
     * - encoding: Set by user.
1334
     * - decoding: unused
1335
     */
1336
    float b_quant_factor;
1337

    
1338
    /** obsolete FIXME remove */
1339
    int rc_strategy;
1340
#define FF_RC_STRATEGY_XVID 1
1341

    
1342
    int b_frame_strategy;
1343

    
1344
    /**
1345
     * hurry up amount
1346
     * - encoding: unused
1347
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1348
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
1349
     */
1350
    int hurry_up;
1351

    
1352
    struct AVCodec *codec;
1353

    
1354
    void *priv_data;
1355

    
1356
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1357
                            /* do its best to deliver a chunk with size     */
1358
                            /* below rtp_payload_size, the chunk will start */
1359
                            /* with a start code on some codecs like H.263. */
1360
                            /* This doesn't take account of any particular  */
1361
                            /* headers inside the transmitted RTP payload.  */
1362

    
1363

    
1364
    /* The RTP callback: This function is called    */
1365
    /* every time the encoder has a packet to send. */
1366
    /* It depends on the encoder if the data starts */
1367
    /* with a Start Code (it should). H.263 does.   */
1368
    /* mb_nb contains the number of macroblocks     */
1369
    /* encoded in the RTP payload.                  */
1370
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1371

    
1372
    /* statistics, used for 2-pass encoding */
1373
    int mv_bits;
1374
    int header_bits;
1375
    int i_tex_bits;
1376
    int p_tex_bits;
1377
    int i_count;
1378
    int p_count;
1379
    int skip_count;
1380
    int misc_bits;
1381

    
1382
    /**
1383
     * number of bits used for the previously encoded frame
1384
     * - encoding: Set by libavcodec.
1385
     * - decoding: unused
1386
     */
1387
    int frame_bits;
1388

    
1389
    /**
1390
     * Private data of the user, can be used to carry app specific stuff.
1391
     * - encoding: Set by user.
1392
     * - decoding: Set by user.
1393
     */
1394
    void *opaque;
1395

    
1396
    char codec_name[32];
1397
    enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1398
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1399

    
1400
    /**
1401
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1402
     * This is used to work around some encoder bugs.
1403
     * A demuxer should set this to what is stored in the field used to identify the codec.
1404
     * If there are multiple such fields in a container then the demuxer should choose the one
1405
     * which maximizes the information about the used codec.
1406
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1407
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1408
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1409
     * first.
1410
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1411
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1412
     */
1413
    unsigned int codec_tag;
1414

    
1415
    /**
1416
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1417
     * - encoding: Set by user
1418
     * - decoding: Set by user
1419
     */
1420
    int workaround_bugs;
1421
#define FF_BUG_AUTODETECT       1  ///< autodetection
1422
#define FF_BUG_OLD_MSMPEG4      2
1423
#define FF_BUG_XVID_ILACE       4
1424
#define FF_BUG_UMP4             8
1425
#define FF_BUG_NO_PADDING       16
1426
#define FF_BUG_AMV              32
1427
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1428
#define FF_BUG_QPEL_CHROMA      64
1429
#define FF_BUG_STD_QPEL         128
1430
#define FF_BUG_QPEL_CHROMA2     256
1431
#define FF_BUG_DIRECT_BLOCKSIZE 512
1432
#define FF_BUG_EDGE             1024
1433
#define FF_BUG_HPEL_CHROMA      2048
1434
#define FF_BUG_DC_CLIP          4096
1435
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1436
#define FF_BUG_TRUNCATED       16384
1437
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1438

    
1439
    /**
1440
     * luma single coefficient elimination threshold
1441
     * - encoding: Set by user.
1442
     * - decoding: unused
1443
     */
1444
    int luma_elim_threshold;
1445

    
1446
    /**
1447
     * chroma single coeff elimination threshold
1448
     * - encoding: Set by user.
1449
     * - decoding: unused
1450
     */
1451
    int chroma_elim_threshold;
1452

    
1453
    /**
1454
     * strictly follow the standard (MPEG4, ...).
1455
     * - encoding: Set by user.
1456
     * - decoding: Set by user.
1457
     * Setting this to STRICT or higher means the encoder and decoder will
1458
     * generally do stupid things, whereas setting it to unofficial or lower
1459
     * will mean the encoder might produce output that is not supported by all
1460
     * spec-compliant decoders. Decoders don't differentiate between normal,
1461
     * unofficial and experimental (that is, they always try to decode things
1462
     * when they can) unless they are explicitly asked to behave stupidly
1463
     * (=strictly conform to the specs)
1464
     */
1465
    int strict_std_compliance;
1466
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to an older more strict version of the spec or reference software.
1467
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1468
#define FF_COMPLIANCE_NORMAL        0
1469
#if FF_API_INOFFICIAL
1470
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions (deprecated - use FF_COMPLIANCE_UNOFFICIAL instead).
1471
#endif
1472
#define FF_COMPLIANCE_UNOFFICIAL   -1 ///< Allow unofficial extensions
1473
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1474

    
1475
    /**
1476
     * qscale offset between IP and B-frames
1477
     * - encoding: Set by user.
1478
     * - decoding: unused
1479
     */
1480
    float b_quant_offset;
1481

    
1482
    /**
1483
     * Error recognization; higher values will detect more errors but may
1484
     * misdetect some more or less valid parts as errors.
1485
     * - encoding: unused
1486
     * - decoding: Set by user.
1487
     */
1488
    int error_recognition;
1489
#define FF_ER_CAREFUL         1
1490
#define FF_ER_COMPLIANT       2
1491
#define FF_ER_AGGRESSIVE      3
1492
#define FF_ER_VERY_AGGRESSIVE 4
1493

    
1494
    /**
1495
     * Called at the beginning of each frame to get a buffer for it.
1496
     * If pic.reference is set then the frame will be read later by libavcodec.
1497
     * avcodec_align_dimensions2() should be used to find the required width and
1498
     * height, as they normally need to be rounded up to the next multiple of 16.
1499
     * if CODEC_CAP_DR1 is not set then get_buffer() must call
1500
     * avcodec_default_get_buffer() instead of providing buffers allocated by
1501
     * some other means.
1502
     * - encoding: unused
1503
     * - decoding: Set by libavcodec, user can override.
1504
     */
1505
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1506

    
1507
    /**
1508
     * Called to release buffers which were allocated with get_buffer.
1509
     * A released buffer can be reused in get_buffer().
1510
     * pic.data[*] must be set to NULL.
1511
     * - encoding: unused
1512
     * - decoding: Set by libavcodec, user can override.
1513
     */
1514
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1515

    
1516
    /**
1517
     * Size of the frame reordering buffer in the decoder.
1518
     * For MPEG-2 it is 1 IPB or 0 low delay IP.
1519
     * - encoding: Set by libavcodec.
1520
     * - decoding: Set by libavcodec.
1521
     */
1522
    int has_b_frames;
1523

    
1524
    /**
1525
     * number of bytes per packet if constant and known or 0
1526
     * Used by some WAV based audio codecs.
1527
     */
1528
    int block_align;
1529

    
1530
    int parse_only; /* - decoding only: If true, only parsing is done
1531
                       (function avcodec_parse_frame()). The frame
1532
                       data is returned. Only MPEG codecs support this now. */
1533

    
1534
    /**
1535
     * 0-> h263 quant 1-> mpeg quant
1536
     * - encoding: Set by user.
1537
     * - decoding: unused
1538
     */
1539
    int mpeg_quant;
1540

    
1541
    /**
1542
     * pass1 encoding statistics output buffer
1543
     * - encoding: Set by libavcodec.
1544
     * - decoding: unused
1545
     */
1546
    char *stats_out;
1547

    
1548
    /**
1549
     * pass2 encoding statistics input buffer
1550
     * Concatenated stuff from stats_out of pass1 should be placed here.
1551
     * - encoding: Allocated/set/freed by user.
1552
     * - decoding: unused
1553
     */
1554
    char *stats_in;
1555

    
1556
    /**
1557
     * ratecontrol qmin qmax limiting method
1558
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1559
     * - encoding: Set by user.
1560
     * - decoding: unused
1561
     */
1562
    float rc_qsquish;
1563

    
1564
    float rc_qmod_amp;
1565
    int rc_qmod_freq;
1566

    
1567
    /**
1568
     * ratecontrol override, see RcOverride
1569
     * - encoding: Allocated/set/freed by user.
1570
     * - decoding: unused
1571
     */
1572
    RcOverride *rc_override;
1573
    int rc_override_count;
1574

    
1575
    /**
1576
     * rate control equation
1577
     * - encoding: Set by user
1578
     * - decoding: unused
1579
     */
1580
    const char *rc_eq;
1581

    
1582
    /**
1583
     * maximum bitrate
1584
     * - encoding: Set by user.
1585
     * - decoding: unused
1586
     */
1587
    int rc_max_rate;
1588

    
1589
    /**
1590
     * minimum bitrate
1591
     * - encoding: Set by user.
1592
     * - decoding: unused
1593
     */
1594
    int rc_min_rate;
1595

    
1596
    /**
1597
     * decoder bitstream buffer size
1598
     * - encoding: Set by user.
1599
     * - decoding: unused
1600
     */
1601
    int rc_buffer_size;
1602
    float rc_buffer_aggressivity;
1603

    
1604
    /**
1605
     * qscale factor between P and I-frames
1606
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1607
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1608
     * - encoding: Set by user.
1609
     * - decoding: unused
1610
     */
1611
    float i_quant_factor;
1612

    
1613
    /**
1614
     * qscale offset between P and I-frames
1615
     * - encoding: Set by user.
1616
     * - decoding: unused
1617
     */
1618
    float i_quant_offset;
1619

    
1620
    /**
1621
     * initial complexity for pass1 ratecontrol
1622
     * - encoding: Set by user.
1623
     * - decoding: unused
1624
     */
1625
    float rc_initial_cplx;
1626

    
1627
    /**
1628
     * DCT algorithm, see FF_DCT_* below
1629
     * - encoding: Set by user.
1630
     * - decoding: unused
1631
     */
1632
    int dct_algo;
1633
#define FF_DCT_AUTO    0
1634
#define FF_DCT_FASTINT 1
1635
#define FF_DCT_INT     2
1636
#define FF_DCT_MMX     3
1637
#define FF_DCT_MLIB    4
1638
#define FF_DCT_ALTIVEC 5
1639
#define FF_DCT_FAAN    6
1640

    
1641
    /**
1642
     * luminance masking (0-> disabled)
1643
     * - encoding: Set by user.
1644
     * - decoding: unused
1645
     */
1646
    float lumi_masking;
1647

    
1648
    /**
1649
     * temporary complexity masking (0-> disabled)
1650
     * - encoding: Set by user.
1651
     * - decoding: unused
1652
     */
1653
    float temporal_cplx_masking;
1654

    
1655
    /**
1656
     * spatial complexity masking (0-> disabled)
1657
     * - encoding: Set by user.
1658
     * - decoding: unused
1659
     */
1660
    float spatial_cplx_masking;
1661

    
1662
    /**
1663
     * p block masking (0-> disabled)
1664
     * - encoding: Set by user.
1665
     * - decoding: unused
1666
     */
1667
    float p_masking;
1668

    
1669
    /**
1670
     * darkness masking (0-> disabled)
1671
     * - encoding: Set by user.
1672
     * - decoding: unused
1673
     */
1674
    float dark_masking;
1675

    
1676
    /**
1677
     * IDCT algorithm, see FF_IDCT_* below.
1678
     * - encoding: Set by user.
1679
     * - decoding: Set by user.
1680
     */
1681
    int idct_algo;
1682
#define FF_IDCT_AUTO          0
1683
#define FF_IDCT_INT           1
1684
#define FF_IDCT_SIMPLE        2
1685
#define FF_IDCT_SIMPLEMMX     3
1686
#define FF_IDCT_LIBMPEG2MMX   4
1687
#define FF_IDCT_PS2           5
1688
#define FF_IDCT_MLIB          6
1689
#define FF_IDCT_ARM           7
1690
#define FF_IDCT_ALTIVEC       8
1691
#define FF_IDCT_SH4           9
1692
#define FF_IDCT_SIMPLEARM     10
1693
#define FF_IDCT_H264          11
1694
#define FF_IDCT_VP3           12
1695
#define FF_IDCT_IPP           13
1696
#define FF_IDCT_XVIDMMX       14
1697
#define FF_IDCT_CAVS          15
1698
#define FF_IDCT_SIMPLEARMV5TE 16
1699
#define FF_IDCT_SIMPLEARMV6   17
1700
#define FF_IDCT_SIMPLEVIS     18
1701
#define FF_IDCT_WMV2          19
1702
#define FF_IDCT_FAAN          20
1703
#define FF_IDCT_EA            21
1704
#define FF_IDCT_SIMPLENEON    22
1705
#define FF_IDCT_SIMPLEALPHA   23
1706
#define FF_IDCT_BINK          24
1707

    
1708
    /**
1709
     * slice count
1710
     * - encoding: Set by libavcodec.
1711
     * - decoding: Set by user (or 0).
1712
     */
1713
    int slice_count;
1714
    /**
1715
     * slice offsets in the frame in bytes
1716
     * - encoding: Set/allocated by libavcodec.
1717
     * - decoding: Set/allocated by user (or NULL).
1718
     */
1719
    int *slice_offset;
1720

    
1721
    /**
1722
     * error concealment flags
1723
     * - encoding: unused
1724
     * - decoding: Set by user.
1725
     */
1726
    int error_concealment;
1727
#define FF_EC_GUESS_MVS   1
1728
#define FF_EC_DEBLOCK     2
1729

    
1730
    /**
1731
     * dsp_mask could be add used to disable unwanted CPU features
1732
     * CPU features (i.e. MMX, SSE. ...)
1733
     *
1734
     * With the FORCE flag you may instead enable given CPU features.
1735
     * (Dangerous: Usable in case of misdetection, improper usage however will
1736
     * result into program crash.)
1737
     */
1738
    unsigned dsp_mask;
1739

    
1740
#if FF_API_MM_FLAGS
1741
#define FF_MM_FORCE      AV_CPU_FLAG_FORCE
1742
#define FF_MM_MMX        AV_CPU_FLAG_MMX
1743
#define FF_MM_3DNOW      AV_CPU_FLAG_3DNOW
1744
#define FF_MM_MMXEXT     AV_CPU_FLAG_MMX2
1745
#define FF_MM_MMX2       AV_CPU_FLAG_MMX2
1746
#define FF_MM_SSE        AV_CPU_FLAG_SSE
1747
#define FF_MM_SSE2       AV_CPU_FLAG_SSE2
1748
#define FF_MM_SSE2SLOW   AV_CPU_FLAG_SSE2SLOW
1749
#define FF_MM_3DNOWEXT   AV_CPU_FLAG_3DNOWEXT
1750
#define FF_MM_SSE3       AV_CPU_FLAG_SSE3
1751
#define FF_MM_SSE3SLOW   AV_CPU_FLAG_SSE3SLOW
1752
#define FF_MM_SSSE3      AV_CPU_FLAG_SSSE3
1753
#define FF_MM_SSE4       AV_CPU_FLAG_SSE4
1754
#define FF_MM_SSE42      AV_CPU_FLAG_SSE42
1755
#define FF_MM_IWMMXT     AV_CPU_FLAG_IWMMXT
1756
#define FF_MM_ALTIVEC    AV_CPU_FLAG_ALTIVEC
1757
#endif
1758

    
1759
    /**
1760
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1761
     * - encoding: Set by libavcodec.
1762
     * - decoding: Set by user.
1763
     */
1764
     int bits_per_coded_sample;
1765

    
1766
    /**
1767
     * prediction method (needed for huffyuv)
1768
     * - encoding: Set by user.
1769
     * - decoding: unused
1770
     */
1771
     int prediction_method;
1772
#define FF_PRED_LEFT   0
1773
#define FF_PRED_PLANE  1
1774
#define FF_PRED_MEDIAN 2
1775

    
1776
    /**
1777
     * sample aspect ratio (0 if unknown)
1778
     * That is the width of a pixel divided by the height of the pixel.
1779
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1780
     * - encoding: Set by user.
1781
     * - decoding: Set by libavcodec.
1782
     */
1783
    AVRational sample_aspect_ratio;
1784

    
1785
    /**
1786
     * the picture in the bitstream
1787
     * - encoding: Set by libavcodec.
1788
     * - decoding: Set by libavcodec.
1789
     */
1790
    AVFrame *coded_frame;
1791

    
1792
    /**
1793
     * debug
1794
     * - encoding: Set by user.
1795
     * - decoding: Set by user.
1796
     */
1797
    int debug;
1798
#define FF_DEBUG_PICT_INFO   1
1799
#define FF_DEBUG_RC          2
1800
#define FF_DEBUG_BITSTREAM   4
1801
#define FF_DEBUG_MB_TYPE     8
1802
#define FF_DEBUG_QP          16
1803
#define FF_DEBUG_MV          32
1804
#define FF_DEBUG_DCT_COEFF   0x00000040
1805
#define FF_DEBUG_SKIP        0x00000080
1806
#define FF_DEBUG_STARTCODE   0x00000100
1807
#define FF_DEBUG_PTS         0x00000200
1808
#define FF_DEBUG_ER          0x00000400
1809
#define FF_DEBUG_MMCO        0x00000800
1810
#define FF_DEBUG_BUGS        0x00001000
1811
#define FF_DEBUG_VIS_QP      0x00002000
1812
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1813
#define FF_DEBUG_BUFFERS     0x00008000
1814

    
1815
    /**
1816
     * debug
1817
     * - encoding: Set by user.
1818
     * - decoding: Set by user.
1819
     */
1820
    int debug_mv;
1821
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1822
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1823
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1824

    
1825
    /**
1826
     * error
1827
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1828
     * - decoding: unused
1829
     */
1830
    uint64_t error[4];
1831

    
1832
    /**
1833
     * minimum MB quantizer
1834
     * - encoding: unused
1835
     * - decoding: unused
1836
     */
1837
    int mb_qmin;
1838

    
1839
    /**
1840
     * maximum MB quantizer
1841
     * - encoding: unused
1842
     * - decoding: unused
1843
     */
1844
    int mb_qmax;
1845

    
1846
    /**
1847
     * motion estimation comparison function
1848
     * - encoding: Set by user.
1849
     * - decoding: unused
1850
     */
1851
    int me_cmp;
1852
    /**
1853
     * subpixel motion estimation comparison function
1854
     * - encoding: Set by user.
1855
     * - decoding: unused
1856
     */
1857
    int me_sub_cmp;
1858
    /**
1859
     * macroblock comparison function (not supported yet)
1860
     * - encoding: Set by user.
1861
     * - decoding: unused
1862
     */
1863
    int mb_cmp;
1864
    /**
1865
     * interlaced DCT comparison function
1866
     * - encoding: Set by user.
1867
     * - decoding: unused
1868
     */
1869
    int ildct_cmp;
1870
#define FF_CMP_SAD    0
1871
#define FF_CMP_SSE    1
1872
#define FF_CMP_SATD   2
1873
#define FF_CMP_DCT    3
1874
#define FF_CMP_PSNR   4
1875
#define FF_CMP_BIT    5
1876
#define FF_CMP_RD     6
1877
#define FF_CMP_ZERO   7
1878
#define FF_CMP_VSAD   8
1879
#define FF_CMP_VSSE   9
1880
#define FF_CMP_NSSE   10
1881
#define FF_CMP_W53    11
1882
#define FF_CMP_W97    12
1883
#define FF_CMP_DCTMAX 13
1884
#define FF_CMP_DCT264 14
1885
#define FF_CMP_CHROMA 256
1886

    
1887
    /**
1888
     * ME diamond size & shape
1889
     * - encoding: Set by user.
1890
     * - decoding: unused
1891
     */
1892
    int dia_size;
1893

    
1894
    /**
1895
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1896
     * - encoding: Set by user.
1897
     * - decoding: unused
1898
     */
1899
    int last_predictor_count;
1900

    
1901
    /**
1902
     * prepass for motion estimation
1903
     * - encoding: Set by user.
1904
     * - decoding: unused
1905
     */
1906
    int pre_me;
1907

    
1908
    /**
1909
     * motion estimation prepass comparison function
1910
     * - encoding: Set by user.
1911
     * - decoding: unused
1912
     */
1913
    int me_pre_cmp;
1914

    
1915
    /**
1916
     * ME prepass diamond size & shape
1917
     * - encoding: Set by user.
1918
     * - decoding: unused
1919
     */
1920
    int pre_dia_size;
1921

    
1922
    /**
1923
     * subpel ME quality
1924
     * - encoding: Set by user.
1925
     * - decoding: unused
1926
     */
1927
    int me_subpel_quality;
1928

    
1929
    /**
1930
     * callback to negotiate the pixelFormat
1931
     * @param fmt is the list of formats which are supported by the codec,
1932
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1933
     * The first is always the native one.
1934
     * @return the chosen format
1935
     * - encoding: unused
1936
     * - decoding: Set by user, if not set the native format will be chosen.
1937
     */
1938
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1939

    
1940
    /**
1941
     * DTG active format information (additional aspect ratio
1942
     * information only used in DVB MPEG-2 transport streams)
1943
     * 0 if not set.
1944
     *
1945
     * - encoding: unused
1946
     * - decoding: Set by decoder.
1947
     */
1948
    int dtg_active_format;
1949
#define FF_DTG_AFD_SAME         8
1950
#define FF_DTG_AFD_4_3          9
1951
#define FF_DTG_AFD_16_9         10
1952
#define FF_DTG_AFD_14_9         11
1953
#define FF_DTG_AFD_4_3_SP_14_9  13
1954
#define FF_DTG_AFD_16_9_SP_14_9 14
1955
#define FF_DTG_AFD_SP_4_3       15
1956

    
1957
    /**
1958
     * maximum motion estimation search range in subpel units
1959
     * If 0 then no limit.
1960
     *
1961
     * - encoding: Set by user.
1962
     * - decoding: unused
1963
     */
1964
    int me_range;
1965

    
1966
    /**
1967
     * intra quantizer bias
1968
     * - encoding: Set by user.
1969
     * - decoding: unused
1970
     */
1971
    int intra_quant_bias;
1972
#define FF_DEFAULT_QUANT_BIAS 999999
1973

    
1974
    /**
1975
     * inter quantizer bias
1976
     * - encoding: Set by user.
1977
     * - decoding: unused
1978
     */
1979
    int inter_quant_bias;
1980

    
1981
    /**
1982
     * color table ID
1983
     * - encoding: unused
1984
     * - decoding: Which clrtable should be used for 8bit RGB images.
1985
     *             Tables have to be stored somewhere. FIXME
1986
     */
1987
    int color_table_id;
1988

    
1989
    /**
1990
     * internal_buffer count
1991
     * Don't touch, used by libavcodec default_get_buffer().
1992
     */
1993
    int internal_buffer_count;
1994

    
1995
    /**
1996
     * internal_buffers
1997
     * Don't touch, used by libavcodec default_get_buffer().
1998
     */
1999
    void *internal_buffer;
2000

    
2001
    /**
2002
     * Global quality for codecs which cannot change it per frame.
2003
     * This should be proportional to MPEG-1/2/4 qscale.
2004
     * - encoding: Set by user.
2005
     * - decoding: unused
2006
     */
2007
    int global_quality;
2008

    
2009
#define FF_CODER_TYPE_VLC       0
2010
#define FF_CODER_TYPE_AC        1
2011
#define FF_CODER_TYPE_RAW       2
2012
#define FF_CODER_TYPE_RLE       3
2013
#define FF_CODER_TYPE_DEFLATE   4
2014
    /**
2015
     * coder type
2016
     * - encoding: Set by user.
2017
     * - decoding: unused
2018
     */
2019
    int coder_type;
2020

    
2021
    /**
2022
     * context model
2023
     * - encoding: Set by user.
2024
     * - decoding: unused
2025
     */
2026
    int context_model;
2027
#if 0
2028
    /**
2029
     *
2030
     * - encoding: unused
2031
     * - decoding: Set by user.
2032
     */
2033
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
2034
#endif
2035

    
2036
    /**
2037
     * slice flags
2038
     * - encoding: unused
2039
     * - decoding: Set by user.
2040
     */
2041
    int slice_flags;
2042
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
2043
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
2044
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2045

    
2046
    /**
2047
     * XVideo Motion Acceleration
2048
     * - encoding: forbidden
2049
     * - decoding: set by decoder
2050
     */
2051
    int xvmc_acceleration;
2052

    
2053
    /**
2054
     * macroblock decision mode
2055
     * - encoding: Set by user.
2056
     * - decoding: unused
2057
     */
2058
    int mb_decision;
2059
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
2060
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
2061
#define FF_MB_DECISION_RD     2        ///< rate distortion
2062

    
2063
    /**
2064
     * custom intra quantization matrix
2065
     * - encoding: Set by user, can be NULL.
2066
     * - decoding: Set by libavcodec.
2067
     */
2068
    uint16_t *intra_matrix;
2069

    
2070
    /**
2071
     * custom inter quantization matrix
2072
     * - encoding: Set by user, can be NULL.
2073
     * - decoding: Set by libavcodec.
2074
     */
2075
    uint16_t *inter_matrix;
2076

    
2077
    /**
2078
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
2079
     * This is used to work around some encoder bugs.
2080
     * - encoding: unused
2081
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
2082
     */
2083
    unsigned int stream_codec_tag;
2084

    
2085
    /**
2086
     * scene change detection threshold
2087
     * 0 is default, larger means fewer detected scene changes.
2088
     * - encoding: Set by user.
2089
     * - decoding: unused
2090
     */
2091
    int scenechange_threshold;
2092

    
2093
    /**
2094
     * minimum Lagrange multipler
2095
     * - encoding: Set by user.
2096
     * - decoding: unused
2097
     */
2098
    int lmin;
2099

    
2100
    /**
2101
     * maximum Lagrange multipler
2102
     * - encoding: Set by user.
2103
     * - decoding: unused
2104
     */
2105
    int lmax;
2106

    
2107
#if FF_API_PALETTE_CONTROL
2108
    /**
2109
     * palette control structure
2110
     * - encoding: ??? (no palette-enabled encoder yet)
2111
     * - decoding: Set by user.
2112
     */
2113
    struct AVPaletteControl *palctrl;
2114
#endif
2115

    
2116
    /**
2117
     * noise reduction strength
2118
     * - encoding: Set by user.
2119
     * - decoding: unused
2120
     */
2121
    int noise_reduction;
2122

    
2123
    /**
2124
     * Called at the beginning of a frame to get cr buffer for it.
2125
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
2126
     * libavcodec will pass previous buffer in pic, function should return
2127
     * same buffer or new buffer with old frame "painted" into it.
2128
     * If pic.data[0] == NULL must behave like get_buffer().
2129
     * if CODEC_CAP_DR1 is not set then reget_buffer() must call
2130
     * avcodec_default_reget_buffer() instead of providing buffers allocated by
2131
     * some other means.
2132
     * - encoding: unused
2133
     * - decoding: Set by libavcodec, user can override.
2134
     */
2135
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
2136

    
2137
    /**
2138
     * Number of bits which should be loaded into the rc buffer before decoding starts.
2139
     * - encoding: Set by user.
2140
     * - decoding: unused
2141
     */
2142
    int rc_initial_buffer_occupancy;
2143

    
2144
    /**
2145
     *
2146
     * - encoding: Set by user.
2147
     * - decoding: unused
2148
     */
2149
    int inter_threshold;
2150

    
2151
    /**
2152
     * CODEC_FLAG2_*
2153
     * - encoding: Set by user.
2154
     * - decoding: Set by user.
2155
     */
2156
    int flags2;
2157

    
2158
    /**
2159
     * Simulates errors in the bitstream to test error concealment.
2160
     * - encoding: Set by user.
2161
     * - decoding: unused
2162
     */
2163
    int error_rate;
2164

    
2165
    /**
2166
     * MP3 antialias algorithm, see FF_AA_* below.
2167
     * - encoding: unused
2168
     * - decoding: Set by user.
2169
     */
2170
    int antialias_algo;
2171
#define FF_AA_AUTO    0
2172
#define FF_AA_FASTINT 1 //not implemented yet
2173
#define FF_AA_INT     2
2174
#define FF_AA_FLOAT   3
2175
    /**
2176
     * quantizer noise shaping
2177
     * - encoding: Set by user.
2178
     * - decoding: unused
2179
     */
2180
    int quantizer_noise_shaping;
2181

    
2182
    /**
2183
     * thread count
2184
     * is used to decide how many independent tasks should be passed to execute()
2185
     * - encoding: Set by user.
2186
     * - decoding: Set by user.
2187
     */
2188
    int thread_count;
2189

    
2190
    /**
2191
     * The codec may call this to execute several independent things.
2192
     * It will return only after finishing all tasks.
2193
     * The user may replace this with some multithreaded implementation,
2194
     * the default implementation will execute the parts serially.
2195
     * @param count the number of things to execute
2196
     * - encoding: Set by libavcodec, user can override.
2197
     * - decoding: Set by libavcodec, user can override.
2198
     */
2199
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2200

    
2201
    /**
2202
     * thread opaque
2203
     * Can be used by execute() to store some per AVCodecContext stuff.
2204
     * - encoding: set by execute()
2205
     * - decoding: set by execute()
2206
     */
2207
    void *thread_opaque;
2208

    
2209
    /**
2210
     * Motion estimation threshold below which no motion estimation is
2211
     * performed, but instead the user specified motion vectors are used.
2212
     *
2213
     * - encoding: Set by user.
2214
     * - decoding: unused
2215
     */
2216
     int me_threshold;
2217

    
2218
    /**
2219
     * Macroblock threshold below which the user specified macroblock types will be used.
2220
     * - encoding: Set by user.
2221
     * - decoding: unused
2222
     */
2223
     int mb_threshold;
2224

    
2225
    /**
2226
     * precision of the intra DC coefficient - 8
2227
     * - encoding: Set by user.
2228
     * - decoding: unused
2229
     */
2230
     int intra_dc_precision;
2231

    
2232
    /**
2233
     * noise vs. sse weight for the nsse comparsion function
2234
     * - encoding: Set by user.
2235
     * - decoding: unused
2236
     */
2237
     int nsse_weight;
2238

    
2239
    /**
2240
     * Number of macroblock rows at the top which are skipped.
2241
     * - encoding: unused
2242
     * - decoding: Set by user.
2243
     */
2244
     int skip_top;
2245

    
2246
    /**
2247
     * Number of macroblock rows at the bottom which are skipped.
2248
     * - encoding: unused
2249
     * - decoding: Set by user.
2250
     */
2251
     int skip_bottom;
2252

    
2253
    /**
2254
     * profile
2255
     * - encoding: Set by user.
2256
     * - decoding: Set by libavcodec.
2257
     */
2258
     int profile;
2259
#define FF_PROFILE_UNKNOWN -99
2260

    
2261
#define FF_PROFILE_AAC_MAIN 0
2262
#define FF_PROFILE_AAC_LOW  1
2263
#define FF_PROFILE_AAC_SSR  2
2264
#define FF_PROFILE_AAC_LTP  3
2265

    
2266
#define FF_PROFILE_DTS         20
2267
#define FF_PROFILE_DTS_ES      30
2268
#define FF_PROFILE_DTS_96_24   40
2269
#define FF_PROFILE_DTS_HD_HRA  50
2270
#define FF_PROFILE_DTS_HD_MA   60
2271

    
2272
#define FF_PROFILE_H264_CONSTRAINED  (1<<9)  // 8+1; constraint_set1_flag
2273
#define FF_PROFILE_H264_INTRA        (1<<11) // 8+3; constraint_set3_flag
2274

    
2275
#define FF_PROFILE_H264_BASELINE             66
2276
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2277
#define FF_PROFILE_H264_MAIN                 77
2278
#define FF_PROFILE_H264_EXTENDED             88
2279
#define FF_PROFILE_H264_HIGH                 100
2280
#define FF_PROFILE_H264_HIGH_10              110
2281
#define FF_PROFILE_H264_HIGH_10_INTRA        (110|FF_PROFILE_H264_INTRA)
2282
#define FF_PROFILE_H264_HIGH_422             122
2283
#define FF_PROFILE_H264_HIGH_422_INTRA       (122|FF_PROFILE_H264_INTRA)
2284
#define FF_PROFILE_H264_HIGH_444             144
2285
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE  244
2286
#define FF_PROFILE_H264_HIGH_444_INTRA       (244|FF_PROFILE_H264_INTRA)
2287
#define FF_PROFILE_H264_CAVLC_444            44
2288

    
2289
    /**
2290
     * level
2291
     * - encoding: Set by user.
2292
     * - decoding: Set by libavcodec.
2293
     */
2294
     int level;
2295
#define FF_LEVEL_UNKNOWN -99
2296

    
2297
    /**
2298
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2299
     * - encoding: unused
2300
     * - decoding: Set by user.
2301
     */
2302
     int lowres;
2303

    
2304
    /**
2305
     * Bitstream width / height, may be different from width/height if lowres
2306
     * or other things are used.
2307
     * - encoding: unused
2308
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
2309
     */
2310
    int coded_width, coded_height;
2311

    
2312
    /**
2313
     * frame skip threshold
2314
     * - encoding: Set by user.
2315
     * - decoding: unused
2316
     */
2317
    int frame_skip_threshold;
2318

    
2319
    /**
2320
     * frame skip factor
2321
     * - encoding: Set by user.
2322
     * - decoding: unused
2323
     */
2324
    int frame_skip_factor;
2325

    
2326
    /**
2327
     * frame skip exponent
2328
     * - encoding: Set by user.
2329
     * - decoding: unused
2330
     */
2331
    int frame_skip_exp;
2332

    
2333
    /**
2334
     * frame skip comparison function
2335
     * - encoding: Set by user.
2336
     * - decoding: unused
2337
     */
2338
    int frame_skip_cmp;
2339

    
2340
    /**
2341
     * Border processing masking, raises the quantizer for mbs on the borders
2342
     * of the picture.
2343
     * - encoding: Set by user.
2344
     * - decoding: unused
2345
     */
2346
    float border_masking;
2347

    
2348
    /**
2349
     * minimum MB lagrange multipler
2350
     * - encoding: Set by user.
2351
     * - decoding: unused
2352
     */
2353
    int mb_lmin;
2354

    
2355
    /**
2356
     * maximum MB lagrange multipler
2357
     * - encoding: Set by user.
2358
     * - decoding: unused
2359
     */
2360
    int mb_lmax;
2361

    
2362
    /**
2363
     *
2364
     * - encoding: Set by user.
2365
     * - decoding: unused
2366
     */
2367
    int me_penalty_compensation;
2368

    
2369
    /**
2370
     *
2371
     * - encoding: unused
2372
     * - decoding: Set by user.
2373
     */
2374
    enum AVDiscard skip_loop_filter;
2375

    
2376
    /**
2377
     *
2378
     * - encoding: unused
2379
     * - decoding: Set by user.
2380
     */
2381
    enum AVDiscard skip_idct;
2382

    
2383
    /**
2384
     *
2385
     * - encoding: unused
2386
     * - decoding: Set by user.
2387
     */
2388
    enum AVDiscard skip_frame;
2389

    
2390
    /**
2391
     *
2392
     * - encoding: Set by user.
2393
     * - decoding: unused
2394
     */
2395
    int bidir_refine;
2396

    
2397
    /**
2398
     *
2399
     * - encoding: Set by user.
2400
     * - decoding: unused
2401
     */
2402
    int brd_scale;
2403

    
2404
    /**
2405
     * constant rate factor - quality-based VBR - values ~correspond to qps
2406
     * - encoding: Set by user.
2407
     * - decoding: unused
2408
     */
2409
    float crf;
2410

    
2411
    /**
2412
     * constant quantization parameter rate control method
2413
     * - encoding: Set by user.
2414
     * - decoding: unused
2415
     */
2416
    int cqp;
2417

    
2418
    /**
2419
     * minimum GOP size
2420
     * - encoding: Set by user.
2421
     * - decoding: unused
2422
     */
2423
    int keyint_min;
2424

    
2425
    /**
2426
     * number of reference frames
2427
     * - encoding: Set by user.
2428
     * - decoding: Set by lavc.
2429
     */
2430
    int refs;
2431

    
2432
    /**
2433
     * chroma qp offset from luma
2434
     * - encoding: Set by user.
2435
     * - decoding: unused
2436
     */
2437
    int chromaoffset;
2438

    
2439
    /**
2440
     * Influences how often B-frames are used.
2441
     * - encoding: Set by user.
2442
     * - decoding: unused
2443
     */
2444
    int bframebias;
2445

    
2446
    /**
2447
     * trellis RD quantization
2448
     * - encoding: Set by user.
2449
     * - decoding: unused
2450
     */
2451
    int trellis;
2452

    
2453
    /**
2454
     * Reduce fluctuations in qp (before curve compression).
2455
     * - encoding: Set by user.
2456
     * - decoding: unused
2457
     */
2458
    float complexityblur;
2459

    
2460
    /**
2461
     * in-loop deblocking filter alphac0 parameter
2462
     * alpha is in the range -6...6
2463
     * - encoding: Set by user.
2464
     * - decoding: unused
2465
     */
2466
    int deblockalpha;
2467

    
2468
    /**
2469
     * in-loop deblocking filter beta parameter
2470
     * beta is in the range -6...6
2471
     * - encoding: Set by user.
2472
     * - decoding: unused
2473
     */
2474
    int deblockbeta;
2475

    
2476
    /**
2477
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2478
     * - encoding: Set by user.
2479
     * - decoding: unused
2480
     */
2481
    int partitions;
2482
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2483
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2484
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2485
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2486
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2487

    
2488
    /**
2489
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
2490
     * - encoding: Set by user.
2491
     * - decoding: unused
2492
     */
2493
    int directpred;
2494

    
2495
    /**
2496
     * Audio cutoff bandwidth (0 means "automatic")
2497
     * - encoding: Set by user.
2498
     * - decoding: unused
2499
     */
2500
    int cutoff;
2501

    
2502
    /**
2503
     * Multiplied by qscale for each frame and added to scene_change_score.
2504
     * - encoding: Set by user.
2505
     * - decoding: unused
2506
     */
2507
    int scenechange_factor;
2508

    
2509
    /**
2510
     *
2511
     * Note: Value depends upon the compare function used for fullpel ME.
2512
     * - encoding: Set by user.
2513
     * - decoding: unused
2514
     */
2515
    int mv0_threshold;
2516

    
2517
    /**
2518
     * Adjusts sensitivity of b_frame_strategy 1.
2519
     * - encoding: Set by user.
2520
     * - decoding: unused
2521
     */
2522
    int b_sensitivity;
2523

    
2524
    /**
2525
     * - encoding: Set by user.
2526
     * - decoding: unused
2527
     */
2528
    int compression_level;
2529
#define FF_COMPRESSION_DEFAULT -1
2530

    
2531
#if FF_API_USE_LPC
2532
    /**
2533
     * Sets whether to use LPC mode - used by FLAC encoder.
2534
     * - encoding: Set by user.
2535
     * - decoding: unused
2536
     * @deprecated Deprecated in favor of lpc_type and lpc_passes.
2537
     */
2538
    int use_lpc;
2539
#endif
2540

    
2541
    /**
2542
     * LPC coefficient precision - used by FLAC encoder
2543
     * - encoding: Set by user.
2544
     * - decoding: unused
2545
     */
2546
    int lpc_coeff_precision;
2547

    
2548
    /**
2549
     * - encoding: Set by user.
2550
     * - decoding: unused
2551
     */
2552
    int min_prediction_order;
2553

    
2554
    /**
2555
     * - encoding: Set by user.
2556
     * - decoding: unused
2557
     */
2558
    int max_prediction_order;
2559

    
2560
    /**
2561
     * search method for selecting prediction order
2562
     * - encoding: Set by user.
2563
     * - decoding: unused
2564
     */
2565
    int prediction_order_method;
2566

    
2567
    /**
2568
     * - encoding: Set by user.
2569
     * - decoding: unused
2570
     */
2571
    int min_partition_order;
2572

    
2573
    /**
2574
     * - encoding: Set by user.
2575
     * - decoding: unused
2576
     */
2577
    int max_partition_order;
2578

    
2579
    /**
2580
     * GOP timecode frame start number, in non drop frame format
2581
     * - encoding: Set by user.
2582
     * - decoding: unused
2583
     */
2584
    int64_t timecode_frame_start;
2585

    
2586
#if LIBAVCODEC_VERSION_MAJOR < 53
2587
    /**
2588
     * Decoder should decode to this many channels if it can (0 for default)
2589
     * - encoding: unused
2590
     * - decoding: Set by user.
2591
     * @deprecated Deprecated in favor of request_channel_layout.
2592
     */
2593
    int request_channels;
2594
#endif
2595

    
2596
    /**
2597
     * Percentage of dynamic range compression to be applied by the decoder.
2598
     * The default value is 1.0, corresponding to full compression.
2599
     * - encoding: unused
2600
     * - decoding: Set by user.
2601
     */
2602
    float drc_scale;
2603

    
2604
    /**
2605
     * opaque 64bit number (generally a PTS) that will be reordered and
2606
     * output in AVFrame.reordered_opaque
2607
     * @deprecated in favor of pkt_pts
2608
     * - encoding: unused
2609
     * - decoding: Set by user.
2610
     */
2611
    int64_t reordered_opaque;
2612

    
2613
    /**
2614
     * Bits per sample/pixel of internal libavcodec pixel/sample format.
2615
     * This field is applicable only when sample_fmt is AV_SAMPLE_FMT_S32.
2616
     * - encoding: set by user.
2617
     * - decoding: set by libavcodec.
2618
     */
2619
    int bits_per_raw_sample;
2620

    
2621
    /**
2622
     * Audio channel layout.
2623
     * - encoding: set by user.
2624
     * - decoding: set by libavcodec.
2625
     */
2626
    int64_t channel_layout;
2627

    
2628
    /**
2629
     * Request decoder to use this channel layout if it can (0 for default)
2630
     * - encoding: unused
2631
     * - decoding: Set by user.
2632
     */
2633
    int64_t request_channel_layout;
2634

    
2635
    /**
2636
     * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2637
     * - encoding: Set by user.
2638
     * - decoding: unused.
2639
     */
2640
    float rc_max_available_vbv_use;
2641

    
2642
    /**
2643
     * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2644
     * - encoding: Set by user.
2645
     * - decoding: unused.
2646
     */
2647
    float rc_min_vbv_overflow_use;
2648

    
2649
    /**
2650
     * Hardware accelerator in use
2651
     * - encoding: unused.
2652
     * - decoding: Set by libavcodec
2653
     */
2654
    struct AVHWAccel *hwaccel;
2655

    
2656
    /**
2657
     * For some codecs, the time base is closer to the field rate than the frame rate.
2658
     * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
2659
     * if no telecine is used ...
2660
     *
2661
     * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
2662
     */
2663
    int ticks_per_frame;
2664

    
2665
    /**
2666
     * Hardware accelerator context.
2667
     * For some hardware accelerators, a global context needs to be
2668
     * provided by the user. In that case, this holds display-dependent
2669
     * data FFmpeg cannot instantiate itself. Please refer to the
2670
     * FFmpeg HW accelerator documentation to know how to fill this
2671
     * is. e.g. for VA API, this is a struct vaapi_context.
2672
     * - encoding: unused
2673
     * - decoding: Set by user
2674
     */
2675
    void *hwaccel_context;
2676

    
2677
    /**
2678
     * Chromaticity coordinates of the source primaries.
2679
     * - encoding: Set by user
2680
     * - decoding: Set by libavcodec
2681
     */
2682
    enum AVColorPrimaries color_primaries;
2683

    
2684
    /**
2685
     * Color Transfer Characteristic.
2686
     * - encoding: Set by user
2687
     * - decoding: Set by libavcodec
2688
     */
2689
    enum AVColorTransferCharacteristic color_trc;
2690

    
2691
    /**
2692
     * YUV colorspace type.
2693
     * - encoding: Set by user
2694
     * - decoding: Set by libavcodec
2695
     */
2696
    enum AVColorSpace colorspace;
2697

    
2698
    /**
2699
     * MPEG vs JPEG YUV range.
2700
     * - encoding: Set by user
2701
     * - decoding: Set by libavcodec
2702
     */
2703
    enum AVColorRange color_range;
2704

    
2705
    /**
2706
     * This defines the location of chroma samples.
2707
     * - encoding: Set by user
2708
     * - decoding: Set by libavcodec
2709
     */
2710
    enum AVChromaLocation chroma_sample_location;
2711

    
2712
    /**
2713
     * The codec may call this to execute several independent things.
2714
     * It will return only after finishing all tasks.
2715
     * The user may replace this with some multithreaded implementation,
2716
     * the default implementation will execute the parts serially.
2717
     * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2718
     * @param c context passed also to func
2719
     * @param count the number of things to execute
2720
     * @param arg2 argument passed unchanged to func
2721
     * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2722
     * @param func function that will be called count times, with jobnr from 0 to count-1.
2723
     *             threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2724
     *             two instances of func executing at the same time will have the same threadnr.
2725
     * @return always 0 currently, but code should handle a future improvement where when any call to func
2726
     *         returns < 0 no further calls to func may be done and < 0 is returned.
2727
     * - encoding: Set by libavcodec, user can override.
2728
     * - decoding: Set by libavcodec, user can override.
2729
     */
2730
    int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2731

    
2732
    /**
2733
     * explicit P-frame weighted prediction analysis method
2734
     * 0: off
2735
     * 1: fast blind weighting (one reference duplicate with -1 offset)
2736
     * 2: smart weighting (full fade detection analysis)
2737
     * - encoding: Set by user.
2738
     * - decoding: unused
2739
     */
2740
    int weighted_p_pred;
2741

    
2742
    /**
2743
     * AQ mode
2744
     * 0: Disabled
2745
     * 1: Variance AQ (complexity mask)
2746
     * 2: Auto-variance AQ (experimental)
2747
     * - encoding: Set by user
2748
     * - decoding: unused
2749
     */
2750
    int aq_mode;
2751

    
2752
    /**
2753
     * AQ strength
2754
     * Reduces blocking and blurring in flat and textured areas.
2755
     * - encoding: Set by user
2756
     * - decoding: unused
2757
     */
2758
    float aq_strength;
2759

    
2760
    /**
2761
     * PSY RD
2762
     * Strength of psychovisual optimization
2763
     * - encoding: Set by user
2764
     * - decoding: unused
2765
     */
2766
    float psy_rd;
2767

    
2768
    /**
2769
     * PSY trellis
2770
     * Strength of psychovisual optimization
2771
     * - encoding: Set by user
2772
     * - decoding: unused
2773
     */
2774
    float psy_trellis;
2775

    
2776
    /**
2777
     * RC lookahead
2778
     * Number of frames for frametype and ratecontrol lookahead
2779
     * - encoding: Set by user
2780
     * - decoding: unused
2781
     */
2782
    int rc_lookahead;
2783

    
2784
    /**
2785
     * Constant rate factor maximum
2786
     * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse
2787
     * than crf_max, even if doing so would violate VBV restrictions.
2788
     * - encoding: Set by user.
2789
     * - decoding: unused
2790
     */
2791
    float crf_max;
2792

    
2793
    int log_level_offset;
2794

    
2795
    /**
2796
     * Determines which LPC analysis algorithm to use.
2797
     * - encoding: Set by user
2798
     * - decoding: unused
2799
     */
2800
    enum AVLPCType lpc_type;
2801

    
2802
    /**
2803
     * Number of passes to use for Cholesky factorization during LPC analysis
2804
     * - encoding: Set by user
2805
     * - decoding: unused
2806
     */
2807
    int lpc_passes;
2808

    
2809
    /**
2810
     * Number of slices.
2811
     * Indicates number of picture subdivisions. Used for parallelized
2812
     * decoding.
2813
     * - encoding: Set by user
2814
     * - decoding: unused
2815
     */
2816
    int slices;
2817

    
2818
    /**
2819
     * Header containing style information for text subtitles.
2820
     * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
2821
     * [Script Info] and [V4+ Styles] section, plus the [Events] line and
2822
     * the Format line following. It shouldn't include any Dialogue line.
2823
     * - encoding: Set/allocated/freed by user (before avcodec_open())
2824
     * - decoding: Set/allocated/freed by libavcodec (by avcodec_open())
2825
     */
2826
    uint8_t *subtitle_header;
2827
    int subtitle_header_size;
2828

    
2829
    /**
2830
     * Current packet as passed into the decoder, to avoid having
2831
     * to pass the packet into every function. Currently only valid
2832
     * inside lavc and get/release_buffer callbacks.
2833
     * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
2834
     * - encoding: unused
2835
     */
2836
    AVPacket *pkt;
2837

    
2838
    /**
2839
     * Current statistics for PTS correction.
2840
     * - decoding: maintained and used by libavcodec
2841
     * - encoding: unused
2842
     */
2843
    int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
2844
    int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
2845
    int64_t pts_correction_last_pts;       /// PTS of the last frame
2846
    int64_t pts_correction_last_dts;       /// DTS of the last frame
2847

    
2848
} AVCodecContext;
2849

    
2850
/**
2851
 * AVProfile.
2852
 */
2853
typedef struct AVProfile {
2854
    int profile;
2855
    const char *name; ///< short name for the profile
2856
} AVProfile;
2857

    
2858
/**
2859
 * AVCodec.
2860
 */
2861
typedef struct AVCodec {
2862
    /**
2863
     * Name of the codec implementation.
2864
     * The name is globally unique among encoders and among decoders (but an
2865
     * encoder and a decoder can share the same name).
2866
     * This is the primary way to find a codec from the user perspective.
2867
     */
2868
    const char *name;
2869
    enum AVMediaType type;
2870
    enum CodecID id;
2871
    int priv_data_size;
2872
    int (*init)(AVCodecContext *);
2873
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2874
    int (*close)(AVCodecContext *);
2875
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
2876
    /**
2877
     * Codec capabilities.
2878
     * see CODEC_CAP_*
2879
     */
2880
    int capabilities;
2881
    struct AVCodec *next;
2882
    /**
2883
     * Flush buffers.
2884
     * Will be called when seeking
2885
     */
2886
    void (*flush)(AVCodecContext *);
2887
    const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2888
    const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2889
    /**
2890
     * Descriptive name for the codec, meant to be more human readable than name.
2891
     * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
2892
     */
2893
    const char *long_name;
2894
    const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2895
    const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2896
    const int64_t *channel_layouts;         ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
2897
    uint8_t max_lowres;                     ///< maximum value for lowres supported by the decoder
2898
    AVClass *priv_class;                    ///< AVClass for the private context
2899
    const AVProfile *profiles;              ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
2900
} AVCodec;
2901

    
2902
/**
2903
 * AVHWAccel.
2904
 */
2905
typedef struct AVHWAccel {
2906
    /**
2907
     * Name of the hardware accelerated codec.
2908
     * The name is globally unique among encoders and among decoders (but an
2909
     * encoder and a decoder can share the same name).
2910
     */
2911
    const char *name;
2912

    
2913
    /**
2914
     * Type of codec implemented by the hardware accelerator.
2915
     *
2916
     * See AVMEDIA_TYPE_xxx
2917
     */
2918
    enum AVMediaType type;
2919

    
2920
    /**
2921
     * Codec implemented by the hardware accelerator.
2922
     *
2923
     * See CODEC_ID_xxx
2924
     */
2925
    enum CodecID id;
2926

    
2927
    /**
2928
     * Supported pixel format.
2929
     *
2930
     * Only hardware accelerated formats are supported here.
2931
     */
2932
    enum PixelFormat pix_fmt;
2933

    
2934
    /**
2935
     * Hardware accelerated codec capabilities.
2936
     * see FF_HWACCEL_CODEC_CAP_*
2937
     */
2938
    int capabilities;
2939

    
2940
    struct AVHWAccel *next;
2941

    
2942
    /**
2943
     * Called at the beginning of each frame or field picture.
2944
     *
2945
     * Meaningful frame information (codec specific) is guaranteed to
2946
     * be parsed at this point. This function is mandatory.
2947
     *
2948
     * Note that buf can be NULL along with buf_size set to 0.
2949
     * Otherwise, this means the whole frame is available at this point.
2950
     *
2951
     * @param avctx the codec context
2952
     * @param buf the frame data buffer base
2953
     * @param buf_size the size of the frame in bytes
2954
     * @return zero if successful, a negative value otherwise
2955
     */
2956
    int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2957

    
2958
    /**
2959
     * Callback for each slice.
2960
     *
2961
     * Meaningful slice information (codec specific) is guaranteed to
2962
     * be parsed at this point. This function is mandatory.
2963
     *
2964
     * @param avctx the codec context
2965
     * @param buf the slice data buffer base
2966
     * @param buf_size the size of the slice in bytes
2967
     * @return zero if successful, a negative value otherwise
2968
     */
2969
    int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
2970

    
2971
    /**
2972
     * Called at the end of each frame or field picture.
2973
     *
2974
     * The whole picture is parsed at this point and can now be sent
2975
     * to the hardware accelerator. This function is mandatory.
2976
     *
2977
     * @param avctx the codec context
2978
     * @return zero if successful, a negative value otherwise
2979
     */
2980
    int (*end_frame)(AVCodecContext *avctx);
2981

    
2982
    /**
2983
     * Size of HW accelerator private data.
2984
     *
2985
     * Private data is allocated with av_mallocz() before
2986
     * AVCodecContext.get_buffer() and deallocated after
2987
     * AVCodecContext.release_buffer().
2988
     */
2989
    int priv_data_size;
2990
} AVHWAccel;
2991

    
2992
/**
2993
 * four components are given, that's all.
2994
 * the last component is alpha
2995
 */
2996
typedef struct AVPicture {
2997
    uint8_t *data[4];
2998
    int linesize[4];       ///< number of bytes per line
2999
} AVPicture;
3000

    
3001
#if FF_API_PALETTE_CONTROL
3002
/**
3003
 * AVPaletteControl
3004
 * This structure defines a method for communicating palette changes
3005
 * between and demuxer and a decoder.
3006
 *
3007
 * @deprecated Use AVPacket to send palette changes instead.
3008
 * This is totally broken.
3009
 */
3010
#define AVPALETTE_SIZE 1024
3011
#define AVPALETTE_COUNT 256
3012
typedef struct AVPaletteControl {
3013

    
3014
    /* Demuxer sets this to 1 to indicate the palette has changed;
3015
     * decoder resets to 0. */
3016
    int palette_changed;
3017

    
3018
    /* 4-byte ARGB palette entries, stored in native byte order; note that
3019
     * the individual palette components should be on a 8-bit scale; if
3020
     * the palette data comes from an IBM VGA native format, the component
3021
     * data is probably 6 bits in size and needs to be scaled. */
3022
    unsigned int palette[AVPALETTE_COUNT];
3023

    
3024
} AVPaletteControl attribute_deprecated;
3025
#endif
3026

    
3027
enum AVSubtitleType {
3028
    SUBTITLE_NONE,
3029

    
3030
    SUBTITLE_BITMAP,                ///< A bitmap, pict will be set
3031

    
3032
    /**
3033
     * Plain text, the text field must be set by the decoder and is
3034
     * authoritative. ass and pict fields may contain approximations.
3035
     */
3036
    SUBTITLE_TEXT,
3037

    
3038
    /**
3039
     * Formatted text, the ass field must be set by the decoder and is
3040
     * authoritative. pict and text fields may contain approximations.
3041
     */
3042
    SUBTITLE_ASS,
3043
};
3044

    
3045
typedef struct AVSubtitleRect {
3046
    int x;         ///< top left corner  of pict, undefined when pict is not set
3047
    int y;         ///< top left corner  of pict, undefined when pict is not set
3048
    int w;         ///< width            of pict, undefined when pict is not set
3049
    int h;         ///< height           of pict, undefined when pict is not set
3050
    int nb_colors; ///< number of colors in pict, undefined when pict is not set
3051

    
3052
    /**
3053
     * data+linesize for the bitmap of this subtitle.
3054
     * can be set for text/ass as well once they where rendered
3055
     */
3056
    AVPicture pict;
3057
    enum AVSubtitleType type;
3058

    
3059
    char *text;                     ///< 0 terminated plain UTF-8 text
3060

    
3061
    /**
3062
     * 0 terminated ASS/SSA compatible event line.
3063
     * The pressentation of this is unaffected by the other values in this
3064
     * struct.
3065
     */
3066
    char *ass;
3067
} AVSubtitleRect;
3068

    
3069
typedef struct AVSubtitle {
3070
    uint16_t format; /* 0 = graphics */
3071
    uint32_t start_display_time; /* relative to packet pts, in ms */
3072
    uint32_t end_display_time; /* relative to packet pts, in ms */
3073
    unsigned num_rects;
3074
    AVSubtitleRect **rects;
3075
    int64_t pts;    ///< Same as packet pts, in AV_TIME_BASE
3076
} AVSubtitle;
3077

    
3078
/* packet functions */
3079

    
3080
/**
3081
 * @deprecated use NULL instead
3082
 */
3083
attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
3084

    
3085
/**
3086
 * Default packet destructor.
3087
 */
3088
void av_destruct_packet(AVPacket *pkt);
3089

    
3090
/**
3091
 * Initialize optional fields of a packet with default values.
3092
 *
3093
 * @param pkt packet
3094
 */
3095
void av_init_packet(AVPacket *pkt);
3096

    
3097
/**
3098
 * Allocate the payload of a packet and initialize its fields with
3099
 * default values.
3100
 *
3101
 * @param pkt packet
3102
 * @param size wanted payload size
3103
 * @return 0 if OK, AVERROR_xxx otherwise
3104
 */
3105
int av_new_packet(AVPacket *pkt, int size);
3106

    
3107
/**
3108
 * Reduce packet size, correctly zeroing padding
3109
 *
3110
 * @param pkt packet
3111
 * @param size new size
3112
 */
3113
void av_shrink_packet(AVPacket *pkt, int size);
3114

    
3115
/**
3116
 * Increase packet size, correctly zeroing padding
3117
 *
3118
 * @param pkt packet
3119
 * @param grow_by number of bytes by which to increase the size of the packet
3120
 */
3121
int av_grow_packet(AVPacket *pkt, int grow_by);
3122

    
3123
/**
3124
 * @warning This is a hack - the packet memory allocation stuff is broken. The
3125
 * packet is allocated if it was not really allocated.
3126
 */
3127
int av_dup_packet(AVPacket *pkt);
3128

    
3129
/**
3130
 * Free a packet.
3131
 *
3132
 * @param pkt packet to free
3133
 */
3134
void av_free_packet(AVPacket *pkt);
3135

    
3136
/* resample.c */
3137

    
3138
struct ReSampleContext;
3139
struct AVResampleContext;
3140

    
3141
typedef struct ReSampleContext ReSampleContext;
3142

    
3143
#if FF_API_AUDIO_OLD
3144
/**
3145
 * @deprecated Use av_audio_resample_init() instead.
3146
 */
3147
attribute_deprecated ReSampleContext *audio_resample_init(int output_channels, int input_channels,
3148
                                                          int output_rate, int input_rate);
3149
#endif
3150
/**
3151
 *  Initialize audio resampling context
3152
 *
3153
 * @param output_channels  number of output channels
3154
 * @param input_channels   number of input channels
3155
 * @param output_rate      output sample rate
3156
 * @param input_rate       input sample rate
3157
 * @param sample_fmt_out   requested output sample format
3158
 * @param sample_fmt_in    input sample format
3159
 * @param filter_length    length of each FIR filter in the filterbank relative to the cutoff freq
3160
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3161
 * @param linear           If 1 then the used FIR filter will be linearly interpolated
3162
                           between the 2 closest, if 0 the closest will be used
3163
 * @param cutoff           cutoff frequency, 1.0 corresponds to half the output sampling rate
3164
 * @return allocated ReSampleContext, NULL if error occured
3165
 */
3166
ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
3167
                                        int output_rate, int input_rate,
3168
                                        enum AVSampleFormat sample_fmt_out,
3169
                                        enum AVSampleFormat sample_fmt_in,
3170
                                        int filter_length, int log2_phase_count,
3171
                                        int linear, double cutoff);
3172

    
3173
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
3174
void audio_resample_close(ReSampleContext *s);
3175

    
3176

    
3177
/**
3178
 * Initialize an audio resampler.
3179
 * Note, if either rate is not an integer then simply scale both rates up so they are.
3180
 * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
3181
 * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
3182
 * @param linear If 1 then the used FIR filter will be linearly interpolated
3183
                 between the 2 closest, if 0 the closest will be used
3184
 * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
3185
 */
3186
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
3187

    
3188
/**
3189
 * Resample an array of samples using a previously configured context.
3190
 * @param src an array of unconsumed samples
3191
 * @param consumed the number of samples of src which have been consumed are returned here
3192
 * @param src_size the number of unconsumed samples available
3193
 * @param dst_size the amount of space in samples available in dst
3194
 * @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.
3195
 * @return the number of samples written in dst or -1 if an error occurred
3196
 */
3197
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
3198

    
3199

    
3200
/**
3201
 * Compensate samplerate/timestamp drift. The compensation is done by changing
3202
 * the resampler parameters, so no audible clicks or similar distortions occur
3203
 * @param compensation_distance distance in output samples over which the compensation should be performed
3204
 * @param sample_delta number of output samples which should be output less
3205
 *
3206
 * example: av_resample_compensate(c, 10, 500)
3207
 * here instead of 510 samples only 500 samples would be output
3208
 *
3209
 * note, due to rounding the actual compensation might be slightly different,
3210
 * especially if the compensation_distance is large and the in_rate used during init is small
3211
 */
3212
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
3213
void av_resample_close(struct AVResampleContext *c);
3214

    
3215
/**
3216
 * Allocate memory for a picture.  Call avpicture_free to free it.
3217
 *
3218
 * @param picture the picture to be filled in
3219
 * @param pix_fmt the format of the picture
3220
 * @param width the width of the picture
3221
 * @param height the height of the picture
3222
 * @return zero if successful, a negative value if not
3223
 */
3224
int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
3225

    
3226
/**
3227
 * Free a picture previously allocated by avpicture_alloc().
3228
 *
3229
 * @param picture the AVPicture to be freed
3230
 */
3231
void avpicture_free(AVPicture *picture);
3232

    
3233
/**
3234
 * Fill in the AVPicture fields.
3235
 * The fields of the given AVPicture are filled in by using the 'ptr' address
3236
 * which points to the image data buffer. Depending on the specified picture
3237
 * format, one or multiple image data pointers and line sizes will be set.
3238
 * If a planar format is specified, several pointers will be set pointing to
3239
 * the different picture planes and the line sizes of the different planes
3240
 * will be stored in the lines_sizes array.
3241
 * Call with ptr == NULL to get the required size for the ptr buffer.
3242
 *
3243
 * @param picture AVPicture whose fields are to be filled in
3244
 * @param ptr Buffer which will contain or contains the actual image data
3245
 * @param pix_fmt The format in which the picture data is stored.
3246
 * @param width the width of the image in pixels
3247
 * @param height the height of the image in pixels
3248
 * @return size of the image data in bytes
3249
 */
3250
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
3251
                   enum PixelFormat pix_fmt, int width, int height);
3252
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
3253
                     unsigned char *dest, int dest_size);
3254

    
3255
/**
3256
 * Calculate the size in bytes that a picture of the given width and height
3257
 * would occupy if stored in the given picture format.
3258
 * Note that this returns the size of a compact representation as generated
3259
 * by avpicture_layout, which can be smaller than the size required for e.g.
3260
 * avpicture_fill.
3261
 *
3262
 * @param pix_fmt the given picture format
3263
 * @param width the width of the image
3264
 * @param height the height of the image
3265
 * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
3266
 */
3267
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
3268
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
3269
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt);
3270
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
3271

    
3272
#if LIBAVCODEC_VERSION_MAJOR < 53
3273
/**
3274
 * Return the pixel format corresponding to the name name.
3275
 *
3276
 * If there is no pixel format with name name, then look for a
3277
 * pixel format with the name corresponding to the native endian
3278
 * format of name.
3279
 * For example in a little-endian system, first look for "gray16",
3280
 * then for "gray16le".
3281
 *
3282
 * Finally if no pixel format has been found, return PIX_FMT_NONE.
3283
 *
3284
 * @deprecated Deprecated in favor of av_get_pix_fmt().
3285
 */
3286
attribute_deprecated enum PixelFormat avcodec_get_pix_fmt(const char* name);
3287
#endif
3288

    
3289
/**
3290
 * Return a value representing the fourCC code associated to the
3291
 * pixel format pix_fmt, or 0 if no associated fourCC code can be
3292
 * found.
3293
 */
3294
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
3295

    
3296
/**
3297
 * Put a string representing the codec tag codec_tag in buf.
3298
 *
3299
 * @param buf_size size in bytes of buf
3300
 * @return the length of the string that would have been generated if
3301
 * enough space had been available, excluding the trailing null
3302
 */
3303
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
3304

    
3305
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
3306
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
3307
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
3308
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
3309
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
3310
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
3311

    
3312
/**
3313
 * Compute what kind of losses will occur when converting from one specific
3314
 * pixel format to another.
3315
 * When converting from one pixel format to another, information loss may occur.
3316
 * For example, when converting from RGB24 to GRAY, the color information will
3317
 * be lost. Similarly, other losses occur when converting from some formats to
3318
 * other formats. These losses can involve loss of chroma, but also loss of
3319
 * resolution, loss of color depth, loss due to the color space conversion, loss
3320
 * of the alpha bits or loss due to color quantization.
3321
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
3322
 * which will occur when converting from one pixel format to another.
3323
 *
3324
 * @param[in] dst_pix_fmt destination pixel format
3325
 * @param[in] src_pix_fmt source pixel format
3326
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3327
 * @return Combination of flags informing you what kind of losses will occur.
3328
 */
3329
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
3330
                             int has_alpha);
3331

    
3332
/**
3333
 * Find the best pixel format to convert to given a certain source pixel
3334
 * format.  When converting from one pixel format to another, information loss
3335
 * may occur.  For example, when converting from RGB24 to GRAY, the color
3336
 * information will be lost. Similarly, other losses occur when converting from
3337
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
3338
 * the given pixel formats should be used to suffer the least amount of loss.
3339
 * The pixel formats from which it chooses one, are determined by the
3340
 * pix_fmt_mask parameter.
3341
 *
3342
 * @code
3343
 * src_pix_fmt = PIX_FMT_YUV420P;
3344
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
3345
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
3346
 * @endcode
3347
 *
3348
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
3349
 * @param[in] src_pix_fmt source pixel format
3350
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
3351
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
3352
 * @return The best pixel format to convert to or -1 if none was found.
3353
 */
3354
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
3355
                              int has_alpha, int *loss_ptr);
3356

    
3357
#if LIBAVCODEC_VERSION_MAJOR < 53
3358
/**
3359
 * @deprecated Use av_get_pix_fmt_string() instead.
3360
 */
3361
attribute_deprecated
3362
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt);
3363
#endif
3364

    
3365
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
3366
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
3367

    
3368
/**
3369
 * Tell if an image really has transparent alpha values.
3370
 * @return ored mask of FF_ALPHA_xxx constants
3371
 */
3372
int img_get_alpha_info(const AVPicture *src,
3373
                       enum PixelFormat pix_fmt, int width, int height);
3374

    
3375
/* deinterlace a picture */
3376
/* deinterlace - if not supported return -1 */
3377
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
3378
                          enum PixelFormat pix_fmt, int width, int height);
3379

    
3380
/* external high level API */
3381

    
3382
/**
3383
 * If c is NULL, returns the first registered codec,
3384
 * if c is non-NULL, returns the next registered codec after c,
3385
 * or NULL if c is the last one.
3386
 */
3387
AVCodec *av_codec_next(AVCodec *c);
3388

    
3389
/**
3390
 * Return the LIBAVCODEC_VERSION_INT constant.
3391
 */
3392
unsigned avcodec_version(void);
3393

    
3394
/**
3395
 * Return the libavcodec build-time configuration.
3396
 */
3397
const char *avcodec_configuration(void);
3398

    
3399
/**
3400
 * Return the libavcodec license.
3401
 */
3402
const char *avcodec_license(void);
3403

    
3404
/**
3405
 * Initialize libavcodec.
3406
 *
3407
 * @warning This function must be called before any other libavcodec
3408
 * function.
3409
 */
3410
void avcodec_init(void);
3411

    
3412
#if LIBAVCODEC_VERSION_MAJOR < 53
3413
/**
3414
 * @deprecated Deprecated in favor of avcodec_register().
3415
 */
3416
attribute_deprecated void register_avcodec(AVCodec *codec);
3417
#endif
3418

    
3419
/**
3420
 * Register the codec codec and initialize libavcodec.
3421
 *
3422
 * @see avcodec_init()
3423
 */
3424
void avcodec_register(AVCodec *codec);
3425

    
3426
/**
3427
 * Find a registered encoder with a matching codec ID.
3428
 *
3429
 * @param id CodecID of the requested encoder
3430
 * @return An encoder if one was found, NULL otherwise.
3431
 */
3432
AVCodec *avcodec_find_encoder(enum CodecID id);
3433

    
3434
/**
3435
 * Find a registered encoder with the specified name.
3436
 *
3437
 * @param name name of the requested encoder
3438
 * @return An encoder if one was found, NULL otherwise.
3439
 */
3440
AVCodec *avcodec_find_encoder_by_name(const char *name);
3441

    
3442
/**
3443
 * Find a registered decoder with a matching codec ID.
3444
 *
3445
 * @param id CodecID of the requested decoder
3446
 * @return A decoder if one was found, NULL otherwise.
3447
 */
3448
AVCodec *avcodec_find_decoder(enum CodecID id);
3449

    
3450
/**
3451
 * Find a registered decoder with the specified name.
3452
 *
3453
 * @param name name of the requested decoder
3454
 * @return A decoder if one was found, NULL otherwise.
3455
 */
3456
AVCodec *avcodec_find_decoder_by_name(const char *name);
3457
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
3458

    
3459
/**
3460
 * Return a name for the specified profile, if available.
3461
 *
3462
 * @param codec the codec that is searched for the given profile
3463
 * @param profile the profile value for which a name is requested
3464
 * @return A name for the profile if found, NULL otherwise.
3465
 */
3466
const char *av_get_profile_name(const AVCodec *codec, int profile);
3467

    
3468
/**
3469
 * Set the fields of the given AVCodecContext to default values.
3470
 *
3471
 * @param s The AVCodecContext of which the fields should be set to default values.
3472
 */
3473
void avcodec_get_context_defaults(AVCodecContext *s);
3474

    
3475
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3476
 *  we WILL change its arguments and name a few times! */
3477
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType);
3478

    
3479
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3480
 *  we WILL change its arguments and name a few times! */
3481
int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
3482

    
3483
/**
3484
 * Allocate an AVCodecContext and set its fields to default values.  The
3485
 * resulting struct can be deallocated by simply calling av_free().
3486
 *
3487
 * @return An AVCodecContext filled with default values or NULL on failure.
3488
 * @see avcodec_get_context_defaults
3489
 */
3490
AVCodecContext *avcodec_alloc_context(void);
3491

    
3492
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3493
 *  we WILL change its arguments and name a few times! */
3494
AVCodecContext *avcodec_alloc_context2(enum AVMediaType);
3495

    
3496
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
3497
 *  we WILL change its arguments and name a few times! */
3498
AVCodecContext *avcodec_alloc_context3(AVCodec *codec);
3499

    
3500
/**
3501
 * Copy the settings of the source AVCodecContext into the destination
3502
 * AVCodecContext. The resulting destination codec context will be
3503
 * unopened, i.e. you are required to call avcodec_open() before you
3504
 * can use this AVCodecContext to decode/encode video/audio data.
3505
 *
3506
 * @param dest target codec context, should be initialized with
3507
 *             avcodec_alloc_context(), but otherwise uninitialized
3508
 * @param src source codec context
3509
 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
3510
 */
3511
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
3512

    
3513
/**
3514
 * Set the fields of the given AVFrame to default values.
3515
 *
3516
 * @param pic The AVFrame of which the fields should be set to default values.
3517
 */
3518
void avcodec_get_frame_defaults(AVFrame *pic);
3519

    
3520
/**
3521
 * Allocate an AVFrame and set its fields to default values.  The resulting
3522
 * struct can be deallocated by simply calling av_free().
3523
 *
3524
 * @return An AVFrame filled with default values or NULL on failure.
3525
 * @see avcodec_get_frame_defaults
3526
 */
3527
AVFrame *avcodec_alloc_frame(void);
3528

    
3529
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
3530
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
3531
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
3532

    
3533
/**
3534
 * Return the amount of padding in pixels which the get_buffer callback must
3535
 * provide around the edge of the image for codecs which do not have the
3536
 * CODEC_FLAG_EMU_EDGE flag.
3537
 *
3538
 * @return Required padding in pixels.
3539
 */
3540
unsigned avcodec_get_edge_width(void);
3541
/**
3542
 * Modify width and height values so that they will result in a memory
3543
 * buffer that is acceptable for the codec if you do not use any horizontal
3544
 * padding.
3545
 *
3546
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3547
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3548
 * according to avcodec_get_edge_width() before.
3549
 */
3550
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
3551
/**
3552
 * Modify width and height values so that they will result in a memory
3553
 * buffer that is acceptable for the codec if you also ensure that all
3554
 * line sizes are a multiple of the respective linesize_align[i].
3555
 *
3556
 * May only be used if a codec with CODEC_CAP_DR1 has been opened.
3557
 * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
3558
 * according to avcodec_get_edge_width() before.
3559
 */
3560
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
3561
                               int linesize_align[4]);
3562

    
3563
#if LIBAVCODEC_VERSION_MAJOR < 53
3564
/**
3565
 * @deprecated Deprecated in favor of av_check_image_size().
3566
 */
3567
attribute_deprecated
3568
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
3569
#endif
3570

    
3571
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
3572

    
3573
int avcodec_thread_init(AVCodecContext *s, int thread_count);
3574
void avcodec_thread_free(AVCodecContext *s);
3575
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
3576
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
3577
//FIXME func typedef
3578

    
3579
/**
3580
 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
3581
 * function the context has to be allocated.
3582
 *
3583
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
3584
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
3585
 * retrieving a codec.
3586
 *
3587
 * @warning This function is not thread safe!
3588
 *
3589
 * @code
3590
 * avcodec_register_all();
3591
 * codec = avcodec_find_decoder(CODEC_ID_H264);
3592
 * if (!codec)
3593
 *     exit(1);
3594
 *
3595
 * context = avcodec_alloc_context();
3596
 *
3597
 * if (avcodec_open(context, codec) < 0)
3598
 *     exit(1);
3599
 * @endcode
3600
 *
3601
 * @param avctx The context which will be set up to use the given codec.
3602
 * @param codec The codec to use within the context.
3603
 * @return zero on success, a negative value on error
3604
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
3605
 */
3606
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
3607

    
3608
#if FF_API_AUDIO_OLD
3609
/**
3610
 * Decode an audio frame from buf into samples.
3611
 * Wrapper function which calls avcodec_decode_audio3.
3612
 *
3613
 * @deprecated Use avcodec_decode_audio3 instead.
3614
 * @param avctx the codec context
3615
 * @param[out] samples the output buffer
3616
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3617
 * @param[in] buf the input buffer
3618
 * @param[in] buf_size the input buffer size in bytes
3619
 * @return On error a negative value is returned, otherwise the number of bytes
3620
 * used or zero if no frame could be decompressed.
3621
 */
3622
attribute_deprecated int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
3623
                         int *frame_size_ptr,
3624
                         const uint8_t *buf, int buf_size);
3625
#endif
3626

    
3627
/**
3628
 * Decode the audio frame of size avpkt->size from avpkt->data into samples.
3629
 * Some decoders may support multiple frames in a single AVPacket, such
3630
 * decoders would then just decode the first frame. In this case,
3631
 * avcodec_decode_audio3 has to be called again with an AVPacket that contains
3632
 * the remaining data in order to decode the second frame etc.
3633
 * If no frame
3634
 * could be outputted, frame_size_ptr is zero. Otherwise, it is the
3635
 * decompressed frame size in bytes.
3636
 *
3637
 * @warning You must set frame_size_ptr to the allocated size of the
3638
 * output buffer before calling avcodec_decode_audio3().
3639
 *
3640
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3641
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3642
 * bits at once and could read over the end.
3643
 *
3644
 * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
3645
 * no overreading happens for damaged MPEG streams.
3646
 *
3647
 * @note You might have to align the input buffer avpkt->data and output buffer
3648
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
3649
 * necessary at all, on others it won't work at all if not aligned and on others
3650
 * it will work but it will have an impact on performance.
3651
 *
3652
 * In practice, avpkt->data should have 4 byte alignment at minimum and
3653
 * samples should be 16 byte aligned unless the CPU doesn't need it
3654
 * (AltiVec and SSE do).
3655
 *
3656
 * @param avctx the codec context
3657
 * @param[out] samples the output buffer, sample type in avctx->sample_fmt
3658
 * @param[in,out] frame_size_ptr the output buffer size in bytes
3659
 * @param[in] avpkt The input AVPacket containing the input buffer.
3660
 *            You can create such packet with av_init_packet() and by then setting
3661
 *            data and size, some decoders might in addition need other fields.
3662
 *            All decoders are designed to use the least fields possible though.
3663
 * @return On error a negative value is returned, otherwise the number of bytes
3664
 * used or zero if no frame data was decompressed (used) from the input AVPacket.
3665
 */
3666
int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
3667
                         int *frame_size_ptr,
3668
                         AVPacket *avpkt);
3669

    
3670
#if FF_API_VIDEO_OLD
3671
/**
3672
 * Decode a video frame from buf into picture.
3673
 * Wrapper function which calls avcodec_decode_video2.
3674
 *
3675
 * @deprecated Use avcodec_decode_video2 instead.
3676
 * @param avctx the codec context
3677
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3678
 * @param[in] buf the input buffer
3679
 * @param[in] buf_size the size of the input buffer in bytes
3680
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3681
 * @return On error a negative value is returned, otherwise the number of bytes
3682
 * used or zero if no frame could be decompressed.
3683
 */
3684
attribute_deprecated int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
3685
                         int *got_picture_ptr,
3686
                         const uint8_t *buf, int buf_size);
3687
#endif
3688

    
3689
/**
3690
 * Decode the video frame of size avpkt->size from avpkt->data into picture.
3691
 * Some decoders may support multiple frames in a single AVPacket, such
3692
 * decoders would then just decode the first frame.
3693
 *
3694
 * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
3695
 * the actual read bytes because some optimized bitstream readers read 32 or 64
3696
 * bits at once and could read over the end.
3697
 *
3698
 * @warning The end of the input buffer buf should be set to 0 to ensure that
3699
 * no overreading happens for damaged MPEG streams.
3700
 *
3701
 * @note You might have to align the input buffer avpkt->data.
3702
 * The alignment requirements depend on the CPU: on some CPUs it isn't
3703
 * necessary at all, on others it won't work at all if not aligned and on others
3704
 * it will work but it will have an impact on performance.
3705
 *
3706
 * In practice, avpkt->data should have 4 byte alignment at minimum.
3707
 *
3708
 * @note Some codecs have a delay between input and output, these need to be
3709
 * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
3710
 *
3711
 * @param avctx the codec context
3712
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
3713
 *             Use avcodec_alloc_frame to get an AVFrame, the codec will
3714
 *             allocate memory for the actual bitmap.
3715
 *             with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
3716
 *             with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
3717
 *                   decodes and the decoder tells the user once it does not need the data anymore,
3718
 *                   the user app can at this point free/reuse/keep the memory as it sees fit.
3719
 *
3720
 * @param[in] avpkt The input AVpacket containing the input buffer.
3721
 *            You can create such packet with av_init_packet() and by then setting
3722
 *            data and size, some decoders might in addition need other fields like
3723
 *            flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
3724
 *            fields possible.
3725
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
3726
 * @return On error a negative value is returned, otherwise the number of bytes
3727
 * used or zero if no frame could be decompressed.
3728
 */
3729
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
3730
                         int *got_picture_ptr,
3731
                         AVPacket *avpkt);
3732

    
3733
#if FF_API_SUBTITLE_OLD
3734
/* Decode a subtitle message. Return -1 if error, otherwise return the
3735
 * number of bytes used. If no subtitle could be decompressed,
3736
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
3737
attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
3738
                            int *got_sub_ptr,
3739
                            const uint8_t *buf, int buf_size);
3740
#endif
3741

    
3742
/**
3743
 * Decode a subtitle message.
3744
 * Return a negative value on error, otherwise return the number of bytes used.
3745
 * If no subtitle could be decompressed, got_sub_ptr is zero.
3746
 * Otherwise, the subtitle is stored in *sub.
3747
 * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
3748
 * simplicity, because the performance difference is expect to be negligible
3749
 * and reusing a get_buffer written for video codecs would probably perform badly
3750
 * due to a potentially very different allocation pattern.
3751
 *
3752
 * @param avctx the codec context
3753
 * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
3754
                   freed with avsubtitle_free if *got_sub_ptr is set.
3755
 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
3756
 * @param[in] avpkt The input AVPacket containing the input buffer.
3757
 */
3758
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
3759
                            int *got_sub_ptr,
3760
                            AVPacket *avpkt);
3761

    
3762
/**
3763
 * Frees all allocated data in the given subtitle struct.
3764
 *
3765
 * @param sub AVSubtitle to free.
3766
 */
3767
void avsubtitle_free(AVSubtitle *sub);
3768

    
3769
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
3770
                        int *data_size_ptr,
3771
                        uint8_t *buf, int buf_size);
3772

    
3773
/**
3774
 * Encode an audio frame from samples into buf.
3775
 *
3776
 * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
3777
 * However, for PCM audio the user will know how much space is needed
3778
 * because it depends on the value passed in buf_size as described
3779
 * below. In that case a lower value can be used.
3780
 *
3781
 * @param avctx the codec context
3782
 * @param[out] buf the output buffer
3783
 * @param[in] buf_size the output buffer size
3784
 * @param[in] samples the input buffer containing the samples
3785
 * The number of samples read from this buffer is frame_size*channels,
3786
 * both of which are defined in avctx.
3787
 * For PCM audio the number of samples read from samples is equal to
3788
 * buf_size * input_sample_size / output_sample_size.
3789
 * @return On error a negative value is returned, on success zero or the number
3790
 * of bytes used to encode the data read from the input buffer.
3791
 */
3792
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3793
                         const short *samples);
3794

    
3795
/**
3796
 * Encode a video frame from pict into buf.
3797
 * The input picture should be
3798
 * stored using a specific format, namely avctx.pix_fmt.
3799
 *
3800
 * @param avctx the codec context
3801
 * @param[out] buf the output buffer for the bitstream of encoded frame
3802
 * @param[in] buf_size the size of the output buffer in bytes
3803
 * @param[in] pict the input picture to encode
3804
 * @return On error a negative value is returned, on success zero or the number
3805
 * of bytes used from the output buffer.
3806
 */
3807
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3808
                         const AVFrame *pict);
3809
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
3810
                            const AVSubtitle *sub);
3811

    
3812
int avcodec_close(AVCodecContext *avctx);
3813

    
3814
/**
3815
 * Register all the codecs, parsers and bitstream filters which were enabled at
3816
 * configuration time. If you do not call this function you can select exactly
3817
 * which formats you want to support, by using the individual registration
3818
 * functions.
3819
 *
3820
 * @see avcodec_register
3821
 * @see av_register_codec_parser
3822
 * @see av_register_bitstream_filter
3823
 */
3824
void avcodec_register_all(void);
3825

    
3826
/**
3827
 * Flush buffers, should be called when seeking or when switching to a different stream.
3828
 */
3829
void avcodec_flush_buffers(AVCodecContext *avctx);
3830

    
3831
void avcodec_default_free_buffers(AVCodecContext *s);
3832

    
3833
/* misc useful functions */
3834

    
3835
/**
3836
 * Return a single letter to describe the given picture type pict_type.
3837
 *
3838
 * @param[in] pict_type the picture type
3839
 * @return A single character representing the picture type.
3840
 */
3841
char av_get_pict_type_char(int pict_type);
3842

    
3843
/**
3844
 * Return codec bits per sample.
3845
 *
3846
 * @param[in] codec_id the codec
3847
 * @return Number of bits per sample or zero if unknown for the given codec.
3848
 */
3849
int av_get_bits_per_sample(enum CodecID codec_id);
3850

    
3851
#if FF_API_OLD_SAMPLE_FMT
3852
/**
3853
 * @deprecated Use av_get_bits_per_sample_fmt() instead.
3854
 */
3855
attribute_deprecated
3856
int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt);
3857
#endif
3858

    
3859
/* frame parsing */
3860
typedef struct AVCodecParserContext {
3861
    void *priv_data;
3862
    struct AVCodecParser *parser;
3863
    int64_t frame_offset; /* offset of the current frame */
3864
    int64_t cur_offset; /* current offset
3865
                           (incremented by each av_parser_parse()) */
3866
    int64_t next_frame_offset; /* offset of the next frame */
3867
    /* video info */
3868
    int pict_type; /* XXX: Put it back in AVCodecContext. */
3869
    /**
3870
     * This field is used for proper frame duration computation in lavf.
3871
     * It signals, how much longer the frame duration of the current frame
3872
     * is compared to normal frame duration.
3873
     *
3874
     * frame_duration = (1 + repeat_pict) * time_base
3875
     *
3876
     * It is used by codecs like H.264 to display telecined material.
3877
     */
3878
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
3879
    int64_t pts;     /* pts of the current frame */
3880
    int64_t dts;     /* dts of the current frame */
3881

    
3882
    /* private data */
3883
    int64_t last_pts;
3884
    int64_t last_dts;
3885
    int fetch_timestamp;
3886

    
3887
#define AV_PARSER_PTS_NB 4
3888
    int cur_frame_start_index;
3889
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
3890
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
3891
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
3892

    
3893
    int flags;
3894
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
3895
#define PARSER_FLAG_ONCE                      0x0002
3896
/// Set if the parser has a valid file offset
3897
#define PARSER_FLAG_FETCHED_OFFSET            0x0004
3898

    
3899
    int64_t offset;      ///< byte offset from starting packet start
3900
    int64_t cur_frame_end[AV_PARSER_PTS_NB];
3901

    
3902
    /*!
3903
     * Set by parser to 1 for key frames and 0 for non-key frames.
3904
     * It is initialized to -1, so if the parser doesn't set this flag,
3905
     * old-style fallback using FF_I_TYPE picture type as key frames
3906
     * will be used.
3907
     */
3908
    int key_frame;
3909

    
3910
    /**
3911
     * Time difference in stream time base units from the pts of this
3912
     * packet to the point at which the output from the decoder has converged
3913
     * independent from the availability of previous frames. That is, the
3914
     * frames are virtually identical no matter if decoding started from
3915
     * the very first frame or from this keyframe.
3916
     * Is AV_NOPTS_VALUE if unknown.
3917
     * This field is not the display duration of the current frame.
3918
     * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
3919
     * set.
3920
     *
3921
     * The purpose of this field is to allow seeking in streams that have no
3922
     * keyframes in the conventional sense. It corresponds to the
3923
     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
3924
     * essential for some types of subtitle streams to ensure that all
3925
     * subtitles are correctly displayed after seeking.
3926
     */
3927
    int64_t convergence_duration;
3928

    
3929
    // Timestamp generation support:
3930
    /**
3931
     * Synchronization point for start of timestamp generation.
3932
     *
3933
     * Set to >0 for sync point, 0 for no sync point and <0 for undefined
3934
     * (default).
3935
     *
3936
     * For example, this corresponds to presence of H.264 buffering period
3937
     * SEI message.
3938
     */
3939
    int dts_sync_point;
3940

    
3941
    /**
3942
     * Offset of the current timestamp against last timestamp sync point in
3943
     * units of AVCodecContext.time_base.
3944
     *
3945
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3946
     * contain a valid timestamp offset.
3947
     *
3948
     * Note that the timestamp of sync point has usually a nonzero
3949
     * dts_ref_dts_delta, which refers to the previous sync point. Offset of
3950
     * the next frame after timestamp sync point will be usually 1.
3951
     *
3952
     * For example, this corresponds to H.264 cpb_removal_delay.
3953
     */
3954
    int dts_ref_dts_delta;
3955

    
3956
    /**
3957
     * Presentation delay of current frame in units of AVCodecContext.time_base.
3958
     *
3959
     * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
3960
     * contain valid non-negative timestamp delta (presentation time of a frame
3961
     * must not lie in the past).
3962
     *
3963
     * This delay represents the difference between decoding and presentation
3964
     * time of the frame.
3965
     *
3966
     * For example, this corresponds to H.264 dpb_output_delay.
3967
     */
3968
    int pts_dts_delta;
3969

    
3970
    /**
3971
     * Position of the packet in file.
3972
     *
3973
     * Analogous to cur_frame_pts/dts
3974
     */
3975
    int64_t cur_frame_pos[AV_PARSER_PTS_NB];
3976

    
3977
    /**
3978
     * Byte position of currently parsed frame in stream.
3979
     */
3980
    int64_t pos;
3981

    
3982
    /**
3983
     * Previous frame byte position.
3984
     */
3985
    int64_t last_pos;
3986
} AVCodecParserContext;
3987

    
3988
typedef struct AVCodecParser {
3989
    int codec_ids[5]; /* several codec IDs are permitted */
3990
    int priv_data_size;
3991
    int (*parser_init)(AVCodecParserContext *s);
3992
    int (*parser_parse)(AVCodecParserContext *s,
3993
                        AVCodecContext *avctx,
3994
                        const uint8_t **poutbuf, int *poutbuf_size,
3995
                        const uint8_t *buf, int buf_size);
3996
    void (*parser_close)(AVCodecParserContext *s);
3997
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
3998
    struct AVCodecParser *next;
3999
} AVCodecParser;
4000

    
4001
AVCodecParser *av_parser_next(AVCodecParser *c);
4002

    
4003
void av_register_codec_parser(AVCodecParser *parser);
4004
AVCodecParserContext *av_parser_init(int codec_id);
4005

    
4006
#if LIBAVCODEC_VERSION_MAJOR < 53
4007
attribute_deprecated
4008
int av_parser_parse(AVCodecParserContext *s,
4009
                    AVCodecContext *avctx,
4010
                    uint8_t **poutbuf, int *poutbuf_size,
4011
                    const uint8_t *buf, int buf_size,
4012
                    int64_t pts, int64_t dts);
4013
#endif
4014

    
4015
/**
4016
 * Parse a packet.
4017
 *
4018
 * @param s             parser context.
4019
 * @param avctx         codec context.
4020
 * @param poutbuf       set to pointer to parsed buffer or NULL if not yet finished.
4021
 * @param poutbuf_size  set to size of parsed buffer or zero if not yet finished.
4022
 * @param buf           input buffer.
4023
 * @param buf_size      input length, to signal EOF, this should be 0 (so that the last frame can be output).
4024
 * @param pts           input presentation timestamp.
4025
 * @param dts           input decoding timestamp.
4026
 * @param pos           input byte position in stream.
4027
 * @return the number of bytes of the input bitstream used.
4028
 *
4029
 * Example:
4030
 * @code
4031
 *   while(in_len){
4032
 *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
4033
 *                                        in_data, in_len,
4034
 *                                        pts, dts, pos);
4035
 *       in_data += len;
4036
 *       in_len  -= len;
4037
 *
4038
 *       if(size)
4039
 *          decode_frame(data, size);
4040
 *   }
4041
 * @endcode
4042
 */
4043
int av_parser_parse2(AVCodecParserContext *s,
4044
                     AVCodecContext *avctx,
4045
                     uint8_t **poutbuf, int *poutbuf_size,
4046
                     const uint8_t *buf, int buf_size,
4047
                     int64_t pts, int64_t dts,
4048
                     int64_t pos);
4049

    
4050
int av_parser_change(AVCodecParserContext *s,
4051
                     AVCodecContext *avctx,
4052
                     uint8_t **poutbuf, int *poutbuf_size,
4053
                     const uint8_t *buf, int buf_size, int keyframe);
4054
void av_parser_close(AVCodecParserContext *s);
4055

    
4056

    
4057
typedef struct AVBitStreamFilterContext {
4058
    void *priv_data;
4059
    struct AVBitStreamFilter *filter;
4060
    AVCodecParserContext *parser;
4061
    struct AVBitStreamFilterContext *next;
4062
} AVBitStreamFilterContext;
4063

    
4064

    
4065
typedef struct AVBitStreamFilter {
4066
    const char *name;
4067
    int priv_data_size;
4068
    int (*filter)(AVBitStreamFilterContext *bsfc,
4069
                  AVCodecContext *avctx, const char *args,
4070
                  uint8_t **poutbuf, int *poutbuf_size,
4071
                  const uint8_t *buf, int buf_size, int keyframe);
4072
    void (*close)(AVBitStreamFilterContext *bsfc);
4073
    struct AVBitStreamFilter *next;
4074
} AVBitStreamFilter;
4075

    
4076
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
4077
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
4078
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
4079
                               AVCodecContext *avctx, const char *args,
4080
                               uint8_t **poutbuf, int *poutbuf_size,
4081
                               const uint8_t *buf, int buf_size, int keyframe);
4082
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
4083

    
4084
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
4085

    
4086
/* memory */
4087

    
4088
/**
4089
 * Reallocate the given block if it is not large enough, otherwise do nothing.
4090
 *
4091
 * @see av_realloc
4092
 */
4093
void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4094

    
4095
/**
4096
 * Allocate a buffer, reusing the given one if large enough.
4097
 *
4098
 * Contrary to av_fast_realloc the current buffer contents might not be
4099
 * preserved and on error the old buffer is freed, thus no special
4100
 * handling to avoid memleaks is necessary.
4101
 *
4102
 * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
4103
 * @param size size of the buffer *ptr points to
4104
 * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
4105
 *                 *size 0 if an error occurred.
4106
 */
4107
void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size);
4108

    
4109
#if LIBAVCODEC_VERSION_MAJOR < 53
4110
/**
4111
 * @deprecated Deprecated in favor of av_image_copy().
4112
 */
4113
attribute_deprecated
4114
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
4115
                          uint8_t *src_data[4], int src_linesize[4],
4116
                          enum PixelFormat pix_fmt, int width, int height);
4117
#endif
4118

    
4119
/**
4120
 * Copy image src to dst. Wraps av_picture_data_copy() above.
4121
 */
4122
void av_picture_copy(AVPicture *dst, const AVPicture *src,
4123
                     enum PixelFormat pix_fmt, int width, int height);
4124

    
4125
/**
4126
 * Crop image top and left side.
4127
 */
4128
int av_picture_crop(AVPicture *dst, const AVPicture *src,
4129
                    enum PixelFormat pix_fmt, int top_band, int left_band);
4130

    
4131
/**
4132
 * Pad image.
4133
 */
4134
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
4135
            int padtop, int padbottom, int padleft, int padright, int *color);
4136

    
4137
/**
4138
 * Encode extradata length to a buffer. Used by xiph codecs.
4139
 *
4140
 * @param s buffer to write to; must be at least (v/255+1) bytes long
4141
 * @param v size of extradata in bytes
4142
 * @return number of bytes written to the buffer.
4143
 */
4144
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
4145

    
4146
#if LIBAVCODEC_VERSION_MAJOR < 53
4147
/**
4148
 * Parse str and put in width_ptr and height_ptr the detected values.
4149
 *
4150
 * @deprecated Deprecated in favor of av_parse_video_size().
4151
 */
4152
attribute_deprecated int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
4153

    
4154
/**
4155
 * Parse str and store the detected values in *frame_rate.
4156
 *
4157
 * @deprecated Deprecated in favor of av_parse_video_rate().
4158
 */
4159
attribute_deprecated int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
4160
#endif
4161

    
4162
/**
4163
 * Logs a generic warning message about a missing feature. This function is
4164
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4165
 * only, and would normally not be used by applications.
4166
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4167
 * a pointer to an AVClass struct
4168
 * @param[in] feature string containing the name of the missing feature
4169
 * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
4170
 * If want_sample is non-zero, additional verbage will be added to the log
4171
 * message which tells the user how to report samples to the development
4172
 * mailing list.
4173
 */
4174
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
4175

    
4176
/**
4177
 * Log a generic warning message asking for a sample. This function is
4178
 * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
4179
 * only, and would normally not be used by applications.
4180
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
4181
 * a pointer to an AVClass struct
4182
 * @param[in] msg string containing an optional message, or NULL if no message
4183
 */
4184
void av_log_ask_for_sample(void *avc, const char *msg);
4185

    
4186
/**
4187
 * Register the hardware accelerator hwaccel.
4188
 */
4189
void av_register_hwaccel(AVHWAccel *hwaccel);
4190

    
4191
/**
4192
 * If hwaccel is NULL, returns the first registered hardware accelerator,
4193
 * if hwaccel is non-NULL, returns the next registered hardware accelerator
4194
 * after hwaccel, or NULL if hwaccel is the last one.
4195
 */
4196
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
4197

    
4198

    
4199
/**
4200
 * Lock operation used by lockmgr
4201
 */
4202
enum AVLockOp {
4203
  AV_LOCK_CREATE,  ///< Create a mutex
4204
  AV_LOCK_OBTAIN,  ///< Lock the mutex
4205
  AV_LOCK_RELEASE, ///< Unlock the mutex
4206
  AV_LOCK_DESTROY, ///< Free mutex resources
4207
};
4208

    
4209
/**
4210
 * Register a user provided lock manager supporting the operations
4211
 * specified by AVLockOp. mutex points to a (void *) where the
4212
 * lockmgr should store/get a pointer to a user allocated mutex. It's
4213
 * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
4214
 *
4215
 * @param cb User defined callback. Note: FFmpeg may invoke calls to this
4216
 *           callback during the call to av_lockmgr_register().
4217
 *           Thus, the application must be prepared to handle that.
4218
 *           If cb is set to NULL the lockmgr will be unregistered.
4219
 *           Also note that during unregistration the previously registered
4220
 *           lockmgr callback may also be invoked.
4221
 */
4222
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
4223

    
4224
#endif /* AVCODEC_AVCODEC_H */