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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef FFMPEG_AVCODEC_H
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#define FFMPEG_AVCODEC_H
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/**
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 * @file avcodec.h
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 * external API header
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 */
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#include "libavutil/avutil.h"
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#define LIBAVCODEC_VERSION_MAJOR 51
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#define LIBAVCODEC_VERSION_MINOR 52
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#define LIBAVCODEC_VERSION_MICRO  0
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#define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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                                               LIBAVCODEC_VERSION_MINOR, \
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                                               LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
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                                           LIBAVCODEC_VERSION_MINOR,    \
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                                           LIBAVCODEC_VERSION_MICRO)
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#define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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#define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
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#define AV_TIME_BASE            1000000
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#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
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/**
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 * Identifies the syntax and semantics of the bitstream.
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 * The principle is roughly:
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 * Two decoders with the same ID can decode the same streams.
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 * Two encoders with the same ID can encode compatible streams.
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 * There may be slight deviations from the principle due to implementation
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 * details.
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 *
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 * If you add a codec ID to this list, add it so that
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 * 1. no value of a existing codec ID changes (that would break ABI),
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 * 2. it is as close as possible to similar codecs.
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 */
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enum CodecID {
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    CODEC_ID_NONE,
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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    CODEC_ID_MPEG2VIDEO_XVMC,
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    CODEC_ID_H261,
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    CODEC_ID_H263,
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    CODEC_ID_RV10,
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    CODEC_ID_RV20,
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    CODEC_ID_MJPEG,
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    CODEC_ID_MJPEGB,
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    CODEC_ID_LJPEG,
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    CODEC_ID_SP5X,
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    CODEC_ID_JPEGLS,
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    CODEC_ID_MPEG4,
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    CODEC_ID_RAWVIDEO,
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    CODEC_ID_MSMPEG4V1,
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    CODEC_ID_MSMPEG4V2,
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    CODEC_ID_MSMPEG4V3,
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    CODEC_ID_WMV1,
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    CODEC_ID_WMV2,
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    CODEC_ID_H263P,
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    CODEC_ID_H263I,
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    CODEC_ID_FLV1,
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    CODEC_ID_SVQ1,
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    CODEC_ID_SVQ3,
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    CODEC_ID_DVVIDEO,
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    CODEC_ID_HUFFYUV,
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    CODEC_ID_CYUV,
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    CODEC_ID_H264,
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    CODEC_ID_INDEO3,
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    CODEC_ID_VP3,
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    CODEC_ID_THEORA,
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    CODEC_ID_ASV1,
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    CODEC_ID_ASV2,
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    CODEC_ID_FFV1,
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    CODEC_ID_4XM,
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    CODEC_ID_VCR1,
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    CODEC_ID_CLJR,
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    CODEC_ID_MDEC,
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    CODEC_ID_ROQ,
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    CODEC_ID_INTERPLAY_VIDEO,
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    CODEC_ID_XAN_WC3,
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    CODEC_ID_XAN_WC4,
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    CODEC_ID_RPZA,
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    CODEC_ID_CINEPAK,
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    CODEC_ID_WS_VQA,
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    CODEC_ID_MSRLE,
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    CODEC_ID_MSVIDEO1,
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    CODEC_ID_IDCIN,
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    CODEC_ID_8BPS,
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    CODEC_ID_SMC,
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    CODEC_ID_FLIC,
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    CODEC_ID_TRUEMOTION1,
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    CODEC_ID_VMDVIDEO,
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    CODEC_ID_MSZH,
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    CODEC_ID_ZLIB,
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    CODEC_ID_QTRLE,
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    CODEC_ID_SNOW,
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    CODEC_ID_TSCC,
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    CODEC_ID_ULTI,
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    CODEC_ID_QDRAW,
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    CODEC_ID_VIXL,
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    CODEC_ID_QPEG,
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    CODEC_ID_XVID,
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    CODEC_ID_PNG,
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    CODEC_ID_PPM,
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    CODEC_ID_PBM,
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    CODEC_ID_PGM,
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    CODEC_ID_PGMYUV,
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    CODEC_ID_PAM,
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    CODEC_ID_FFVHUFF,
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    CODEC_ID_RV30,
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    CODEC_ID_RV40,
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    CODEC_ID_VC1,
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    CODEC_ID_WMV3,
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    CODEC_ID_LOCO,
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    CODEC_ID_WNV1,
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    CODEC_ID_AASC,
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    CODEC_ID_INDEO2,
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    CODEC_ID_FRAPS,
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    CODEC_ID_TRUEMOTION2,
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    CODEC_ID_BMP,
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    CODEC_ID_CSCD,
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    CODEC_ID_MMVIDEO,
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    CODEC_ID_ZMBV,
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    CODEC_ID_AVS,
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    CODEC_ID_SMACKVIDEO,
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    CODEC_ID_NUV,
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    CODEC_ID_KMVC,
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    CODEC_ID_FLASHSV,
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    CODEC_ID_CAVS,
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    CODEC_ID_JPEG2000,
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    CODEC_ID_VMNC,
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    CODEC_ID_VP5,
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    CODEC_ID_VP6,
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    CODEC_ID_VP6F,
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    CODEC_ID_TARGA,
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    CODEC_ID_DSICINVIDEO,
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    CODEC_ID_TIERTEXSEQVIDEO,
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    CODEC_ID_TIFF,
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    CODEC_ID_GIF,
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    CODEC_ID_FFH264,
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    CODEC_ID_DXA,
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    CODEC_ID_DNXHD,
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    CODEC_ID_THP,
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    CODEC_ID_SGI,
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    CODEC_ID_C93,
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    CODEC_ID_BETHSOFTVID,
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    CODEC_ID_PTX,
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    CODEC_ID_TXD,
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    CODEC_ID_VP6A,
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    CODEC_ID_AMV,
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    CODEC_ID_VB,
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    CODEC_ID_PCX,
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    CODEC_ID_SUNRAST,
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    CODEC_ID_INDEO4,
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    CODEC_ID_INDEO5,
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    CODEC_ID_MIMIC,
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    /* various PCM "codecs" */
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    CODEC_ID_PCM_S16LE= 0x10000,
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    CODEC_ID_PCM_S16BE,
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    CODEC_ID_PCM_U16LE,
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    CODEC_ID_PCM_U16BE,
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    CODEC_ID_PCM_S8,
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    CODEC_ID_PCM_U8,
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    CODEC_ID_PCM_MULAW,
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    CODEC_ID_PCM_ALAW,
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    CODEC_ID_PCM_S32LE,
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    CODEC_ID_PCM_S32BE,
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    CODEC_ID_PCM_U32LE,
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    CODEC_ID_PCM_U32BE,
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    CODEC_ID_PCM_S24LE,
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    CODEC_ID_PCM_S24BE,
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    CODEC_ID_PCM_U24LE,
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    CODEC_ID_PCM_U24BE,
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    CODEC_ID_PCM_S24DAUD,
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    CODEC_ID_PCM_ZORK,
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    CODEC_ID_PCM_S16LE_PLANAR,
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    /* various ADPCM codecs */
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    CODEC_ID_ADPCM_IMA_QT= 0x11000,
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    CODEC_ID_ADPCM_IMA_WAV,
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    CODEC_ID_ADPCM_IMA_DK3,
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    CODEC_ID_ADPCM_IMA_DK4,
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    CODEC_ID_ADPCM_IMA_WS,
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    CODEC_ID_ADPCM_IMA_SMJPEG,
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    CODEC_ID_ADPCM_MS,
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    CODEC_ID_ADPCM_4XM,
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    CODEC_ID_ADPCM_XA,
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    CODEC_ID_ADPCM_ADX,
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    CODEC_ID_ADPCM_EA,
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    CODEC_ID_ADPCM_G726,
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    CODEC_ID_ADPCM_CT,
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    CODEC_ID_ADPCM_SWF,
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    CODEC_ID_ADPCM_YAMAHA,
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    CODEC_ID_ADPCM_SBPRO_4,
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    CODEC_ID_ADPCM_SBPRO_3,
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    CODEC_ID_ADPCM_SBPRO_2,
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    CODEC_ID_ADPCM_THP,
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    CODEC_ID_ADPCM_IMA_AMV,
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    CODEC_ID_ADPCM_EA_R1,
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    CODEC_ID_ADPCM_EA_R3,
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    CODEC_ID_ADPCM_EA_R2,
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    CODEC_ID_ADPCM_IMA_EA_SEAD,
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    CODEC_ID_ADPCM_IMA_EA_EACS,
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    CODEC_ID_ADPCM_EA_XAS,
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    /* AMR */
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    CODEC_ID_AMR_NB= 0x12000,
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    CODEC_ID_AMR_WB,
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    /* RealAudio codecs*/
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    CODEC_ID_RA_144= 0x13000,
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    CODEC_ID_RA_288,
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    /* various DPCM codecs */
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    CODEC_ID_ROQ_DPCM= 0x14000,
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    CODEC_ID_INTERPLAY_DPCM,
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    CODEC_ID_XAN_DPCM,
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    CODEC_ID_SOL_DPCM,
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    CODEC_ID_MP2= 0x15000,
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    CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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    CODEC_ID_AAC,
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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    CODEC_ID_MPEG4AAC,
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#endif
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    CODEC_ID_AC3,
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    CODEC_ID_DTS,
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    CODEC_ID_VORBIS,
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    CODEC_ID_DVAUDIO,
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    CODEC_ID_WMAV1,
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    CODEC_ID_WMAV2,
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    CODEC_ID_MACE3,
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    CODEC_ID_MACE6,
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    CODEC_ID_VMDAUDIO,
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    CODEC_ID_SONIC,
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    CODEC_ID_SONIC_LS,
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    CODEC_ID_FLAC,
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    CODEC_ID_MP3ADU,
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    CODEC_ID_MP3ON4,
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    CODEC_ID_SHORTEN,
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    CODEC_ID_ALAC,
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    CODEC_ID_WESTWOOD_SND1,
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    CODEC_ID_GSM, ///< as in Berlin toast format
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    CODEC_ID_QDM2,
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    CODEC_ID_COOK,
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    CODEC_ID_TRUESPEECH,
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    CODEC_ID_TTA,
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    CODEC_ID_SMACKAUDIO,
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    CODEC_ID_QCELP,
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    CODEC_ID_WAVPACK,
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    CODEC_ID_DSICINAUDIO,
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    CODEC_ID_IMC,
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    CODEC_ID_MUSEPACK7,
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    CODEC_ID_MLP,
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    CODEC_ID_GSM_MS, /* as found in WAV */
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    CODEC_ID_ATRAC3,
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    CODEC_ID_VOXWARE,
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    CODEC_ID_APE,
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    CODEC_ID_NELLYMOSER,
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    CODEC_ID_MUSEPACK8,
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    CODEC_ID_SPEEX,
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    CODEC_ID_WMAVOICE,
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    CODEC_ID_WMAPRO,
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    CODEC_ID_WMALOSSLESS,
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    /* subtitle codecs */
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    CODEC_ID_DVD_SUBTITLE= 0x17000,
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    CODEC_ID_DVB_SUBTITLE,
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    CODEC_ID_TEXT,  ///< raw UTF-8 text
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    CODEC_ID_XSUB,
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    CODEC_ID_SSA,
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    CODEC_ID_MOV_TEXT,
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    /* other specific kind of codecs (generally used for attachments) */
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    CODEC_ID_TTF= 0x18000,
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    CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
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                                * stream (only used by libavformat) */
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};
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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/* CODEC_ID_MP3LAME is obsolete */
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#define CODEC_ID_MP3LAME CODEC_ID_MP3
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
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#endif
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enum CodecType {
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    CODEC_TYPE_UNKNOWN = -1,
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    CODEC_TYPE_VIDEO,
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    CODEC_TYPE_AUDIO,
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    CODEC_TYPE_DATA,
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    CODEC_TYPE_SUBTITLE,
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    CODEC_TYPE_ATTACHMENT,
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    CODEC_TYPE_NB
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};
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/**
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 * Currently unused, may be used if 24/32 bits samples are ever supported.
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 * all in native-endian format
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 */
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enum SampleFormat {
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    SAMPLE_FMT_NONE = -1,
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    SAMPLE_FMT_U8,              ///< unsigned 8 bits
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    SAMPLE_FMT_S16,             ///< signed 16 bits
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    SAMPLE_FMT_S24,             ///< signed 24 bits
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    SAMPLE_FMT_S32,             ///< signed 32 bits
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    SAMPLE_FMT_FLT,             ///< float
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};
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/* in bytes */
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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/**
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 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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 * This is mainly needed because some optimized bitstream readers read
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 * 32 or 64 bit at once and could read over the end.<br>
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 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
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 * MPEG bitstreams could cause overread and segfault.
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 */
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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/**
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 * minimum encoding buffer size
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 * Used to avoid some checks during header writing.
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 */
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#define FF_MIN_BUFFER_SIZE 16384
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/**
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 * motion estimation type.
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 */
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enum Motion_Est_ID {
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    ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,        ///< enhanced predictive zonal search
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    ME_X1,          ///< reserved for experiments
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    ME_HEX,         ///< hexagon based search
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    ME_UMH,         ///< uneven multi-hexagon search
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    ME_ITER,        ///< iterative search
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};
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enum AVDiscard{
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    /* We leave some space between them for extensions (drop some
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     * keyframes for intra-only or drop just some bidir frames). */
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    AVDISCARD_NONE   =-16, ///< discard nothing
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    AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
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    AVDISCARD_NONREF =  8, ///< discard all non reference
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    AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
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    AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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    AVDISCARD_ALL    = 48, ///< discard all
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};
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typedef struct RcOverride{
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    int start_frame;
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    int end_frame;
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    int qscale; // If this is 0 then quality_factor will be used instead.
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    float quality_factor;
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} RcOverride;
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#define FF_MAX_B_FRAMES 16
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/* encoding support
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   These flags can be passed in AVCodecContext.flags before initialization.
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   Note: Not everything is supported yet.
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*/
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#define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
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#define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
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#define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
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#define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
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#define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
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#define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
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/**
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 * The parent program guarantees that the input for B-frames containing
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 * streams is not written to for at least s->max_b_frames+1 frames, if
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 * this is not set the input will be copied.
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 */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
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#define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
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#define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
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#define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
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#define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
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#define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
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#define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
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                                                  location instead of only at frame boundaries. */
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#define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
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#define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
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#define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
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#define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< Use trellis quantization.
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#define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
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#define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
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/* Fx : Flag for h263+ extra options */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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#define CODEC_FLAG_H263P_AIC      0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
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#endif
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#define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
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#define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
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#define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
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#define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
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#define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
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#define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
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#define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
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#define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
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#define CODEC_FLAG_CLOSED_GOP     ((int)0x80000000)
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#define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
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#define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
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#define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
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#define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
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#define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
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#define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
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#define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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#define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
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#define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
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#define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
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#define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
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#define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
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#define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
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#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
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#define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
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#define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
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#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
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#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
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/* Unsupported options :
455
 *              Syntax Arithmetic coding (SAC)
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 *              Reference Picture Selection
457
 *              Independent Segment Decoding */
458
/* /Fx */
459
/* codec capabilities */
460

    
461
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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/**
463
 * Codec uses get_buffer() for allocating buffers.
464
 * direct rendering method 1
465
 */
466
#define CODEC_CAP_DR1             0x0002
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/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
468
#define CODEC_CAP_PARSE_ONLY      0x0004
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#define CODEC_CAP_TRUNCATED       0x0008
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/* Codec can export data for HW decoding (XvMC). */
471
#define CODEC_CAP_HWACCEL         0x0010
472
/**
473
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
474
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
475
 */
476
#define CODEC_CAP_DELAY           0x0020
477
/**
478
 * Codec can be fed a final frame with a smaller size.
479
 * This can be used to prevent truncation of the last audio samples.
480
 */
481
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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483
//The following defines may change, don't expect compatibility if you use them.
484
#define MB_TYPE_INTRA4x4   0x0001
485
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
486
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
487
#define MB_TYPE_16x16      0x0008
488
#define MB_TYPE_16x8       0x0010
489
#define MB_TYPE_8x16       0x0020
490
#define MB_TYPE_8x8        0x0040
491
#define MB_TYPE_INTERLACED 0x0080
492
#define MB_TYPE_DIRECT2    0x0100 //FIXME
493
#define MB_TYPE_ACPRED     0x0200
494
#define MB_TYPE_GMC        0x0400
495
#define MB_TYPE_SKIP       0x0800
496
#define MB_TYPE_P0L0       0x1000
497
#define MB_TYPE_P1L0       0x2000
498
#define MB_TYPE_P0L1       0x4000
499
#define MB_TYPE_P1L1       0x8000
500
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
501
#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
502
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
503
#define MB_TYPE_QUANT      0x00010000
504
#define MB_TYPE_CBP        0x00020000
505
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
506

    
507
/**
508
 * Pan Scan area.
509
 * This specifies the area which should be displayed.
510
 * Note there may be multiple such areas for one frame.
511
 */
512
typedef struct AVPanScan{
513
    /**
514
     * id
515
     * - encoding: Set by user.
516
     * - decoding: Set by libavcodec.
517
     */
518
    int id;
519

    
520
    /**
521
     * width and height in 1/16 pel
522
     * - encoding: Set by user.
523
     * - decoding: Set by libavcodec.
524
     */
525
    int width;
526
    int height;
527

    
528
    /**
529
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
530
     * - encoding: Set by user.
531
     * - decoding: Set by libavcodec.
532
     */
533
    int16_t position[3][2];
534
}AVPanScan;
535

    
536
#define FF_COMMON_FRAME \
537
    /**\
538
     * pointer to the picture planes.\
539
     * This might be different from the first allocated byte\
540
     * - encoding: \
541
     * - decoding: \
542
     */\
543
    uint8_t *data[4];\
544
    int linesize[4];\
545
    /**\
546
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
547
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
548
     * - encoding: \
549
     * - decoding: \
550
     */\
551
    uint8_t *base[4];\
552
    /**\
553
     * 1 -> keyframe, 0-> not\
554
     * - encoding: Set by libavcodec.\
555
     * - decoding: Set by libavcodec.\
556
     */\
557
    int key_frame;\
558
\
559
    /**\
560
     * Picture type of the frame, see ?_TYPE below.\
561
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
562
     * - decoding: Set by libavcodec.\
563
     */\
564
    int pict_type;\
565
\
566
    /**\
567
     * presentation timestamp in time_base units (time when frame should be shown to user)\
568
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
569
     * - encoding: MUST be set by user.\
570
     * - decoding: Set by libavcodec.\
571
     */\
572
    int64_t pts;\
573
\
574
    /**\
575
     * picture number in bitstream order\
576
     * - encoding: set by\
577
     * - decoding: Set by libavcodec.\
578
     */\
579
    int coded_picture_number;\
580
    /**\
581
     * picture number in display order\
582
     * - encoding: set by\
583
     * - decoding: Set by libavcodec.\
584
     */\
585
    int display_picture_number;\
586
\
587
    /**\
588
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
589
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
590
     * - decoding: Set by libavcodec.\
591
     */\
592
    int quality; \
593
\
594
    /**\
595
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
596
     * Set to INT_MAX if the buffer has not been used yet.\
597
     * - encoding: unused\
598
     * - decoding: MUST be set by get_buffer().\
599
     */\
600
    int age;\
601
\
602
    /**\
603
     * is this picture used as reference\
604
     * The values for this are the same as the MpegEncContext.picture_structure\
605
     * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
606
     * - encoding: unused\
607
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
608
     */\
609
    int reference;\
610
\
611
    /**\
612
     * QP table\
613
     * - encoding: unused\
614
     * - decoding: Set by libavcodec.\
615
     */\
616
    int8_t *qscale_table;\
617
    /**\
618
     * QP store stride\
619
     * - encoding: unused\
620
     * - decoding: Set by libavcodec.\
621
     */\
622
    int qstride;\
623
\
624
    /**\
625
     * mbskip_table[mb]>=1 if MB didn't change\
626
     * stride= mb_width = (width+15)>>4\
627
     * - encoding: unused\
628
     * - decoding: Set by libavcodec.\
629
     */\
630
    uint8_t *mbskip_table;\
631
\
632
    /**\
633
     * motion vector table\
634
     * @code\
635
     * example:\
636
     * int mv_sample_log2= 4 - motion_subsample_log2;\
637
     * int mb_width= (width+15)>>4;\
638
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
639
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
640
     * @endcode\
641
     * - encoding: Set by user.\
642
     * - decoding: Set by libavcodec.\
643
     */\
644
    int16_t (*motion_val[2])[2];\
645
\
646
    /**\
647
     * macroblock type table\
648
     * mb_type_base + mb_width + 2\
649
     * - encoding: Set by user.\
650
     * - decoding: Set by libavcodec.\
651
     */\
652
    uint32_t *mb_type;\
653
\
654
    /**\
655
     * log2 of the size of the block which a single vector in motion_val represents: \
656
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
657
     * - encoding: unused\
658
     * - decoding: Set by libavcodec.\
659
     */\
660
    uint8_t motion_subsample_log2;\
661
\
662
    /**\
663
     * for some private data of the user\
664
     * - encoding: unused\
665
     * - decoding: Set by user.\
666
     */\
667
    void *opaque;\
668
\
669
    /**\
670
     * error\
671
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
672
     * - decoding: unused\
673
     */\
674
    uint64_t error[4];\
675
\
676
    /**\
677
     * type of the buffer (to keep track of who has to deallocate data[*])\
678
     * - encoding: Set by the one who allocates it.\
679
     * - decoding: Set by the one who allocates it.\
680
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
681
     */\
682
    int type;\
683
    \
684
    /**\
685
     * When decoding, this signals how much the picture must be delayed.\
686
     * extra_delay = repeat_pict / (2*fps)\
687
     * - encoding: unused\
688
     * - decoding: Set by libavcodec.\
689
     */\
690
    int repeat_pict;\
691
    \
692
    /**\
693
     * \
694
     */\
695
    int qscale_type;\
696
    \
697
    /**\
698
     * The content of the picture is interlaced.\
699
     * - encoding: Set by user.\
700
     * - decoding: Set by libavcodec. (default 0)\
701
     */\
702
    int interlaced_frame;\
703
    \
704
    /**\
705
     * If the content is interlaced, is top field displayed first.\
706
     * - encoding: Set by user.\
707
     * - decoding: Set by libavcodec.\
708
     */\
709
    int top_field_first;\
710
    \
711
    /**\
712
     * Pan scan.\
713
     * - encoding: Set by user.\
714
     * - decoding: Set by libavcodec.\
715
     */\
716
    AVPanScan *pan_scan;\
717
    \
718
    /**\
719
     * Tell user application that palette has changed from previous frame.\
720
     * - encoding: ??? (no palette-enabled encoder yet)\
721
     * - decoding: Set by libavcodec. (default 0).\
722
     */\
723
    int palette_has_changed;\
724
    \
725
    /**\
726
     * codec suggestion on buffer type if != 0\
727
     * - encoding: unused\
728
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
729
     */\
730
    int buffer_hints;\
731
\
732
    /**\
733
     * DCT coefficients\
734
     * - encoding: unused\
735
     * - decoding: Set by libavcodec.\
736
     */\
737
    short *dct_coeff;\
738
\
739
    /**\
740
     * motion referece frame index\
741
     * - encoding: Set by user.\
742
     * - decoding: Set by libavcodec.\
743
     */\
744
    int8_t *ref_index[2];
745

    
746
#define FF_QSCALE_TYPE_MPEG1 0
747
#define FF_QSCALE_TYPE_MPEG2 1
748
#define FF_QSCALE_TYPE_H264  2
749

    
750
#define FF_BUFFER_TYPE_INTERNAL 1
751
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
752
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
753
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
754

    
755

    
756
#define FF_I_TYPE  1 ///< Intra
757
#define FF_P_TYPE  2 ///< Predicted
758
#define FF_B_TYPE  3 ///< Bi-dir predicted
759
#define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
760
#define FF_SI_TYPE 5 ///< Switching Intra
761
#define FF_SP_TYPE 6 ///< Switching Predicted
762
#define FF_BI_TYPE 7
763

    
764
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
765
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
766
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
767
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
768

    
769
/**
770
 * Audio Video Frame.
771
 * New fields can be added to the end of FF_COMMON_FRAME with minor version
772
 * bumps.
773
 * Removal, reordering and changes to existing fields require a major
774
 * version bump. No fields should be added into AVFrame before or after
775
 * FF_COMMON_FRAME!
776
 * sizeof(AVFrame) must not be used outside libav*.
777
 */
778
typedef struct AVFrame {
779
    FF_COMMON_FRAME
780
} AVFrame;
781

    
782
#define DEFAULT_FRAME_RATE_BASE 1001000
783

    
784
/**
785
 * main external API structure.
786
 * New fields can be added to the end with minor version bumps.
787
 * Removal, reordering and changes to existing fields require a major
788
 * version bump.
789
 * sizeof(AVCodecContext) must not be used outside libav*.
790
 */
791
typedef struct AVCodecContext {
792
    /**
793
     * information on struct for av_log
794
     * - set by avcodec_alloc_context
795
     */
796
    const AVClass *av_class;
797
    /**
798
     * the average bitrate
799
     * - encoding: Set by user; unused for constant quantizer encoding.
800
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
801
     */
802
    int bit_rate;
803

    
804
    /**
805
     * number of bits the bitstream is allowed to diverge from the reference.
806
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
807
     * - encoding: Set by user; unused for constant quantizer encoding.
808
     * - decoding: unused
809
     */
810
    int bit_rate_tolerance;
811

    
812
    /**
813
     * CODEC_FLAG_*.
814
     * - encoding: Set by user.
815
     * - decoding: Set by user.
816
     */
817
    int flags;
818

    
819
    /**
820
     * Some codecs need additional format info. It is stored here.
821
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
822
     * specific codec MUST set it correctly otherwise stream copy breaks.
823
     * In general use of this field by muxers is not recommanded.
824
     * - encoding: Set by libavcodec.
825
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
826
     */
827
    int sub_id;
828

    
829
    /**
830
     * Motion estimation algorithm used for video coding.
831
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
832
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
833
     * - encoding: MUST be set by user.
834
     * - decoding: unused
835
     */
836
    int me_method;
837

    
838
    /**
839
     * some codecs need / can use extradata like Huffman tables.
840
     * mjpeg: Huffman tables
841
     * rv10: additional flags
842
     * mpeg4: global headers (they can be in the bitstream or here)
843
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
844
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
845
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
846
     * - encoding: Set/allocated/freed by libavcodec.
847
     * - decoding: Set/allocated/freed by user.
848
     */
849
    uint8_t *extradata;
850
    int extradata_size;
851

    
852
    /**
853
     * This is the fundamental unit of time (in seconds) in terms
854
     * of which frame timestamps are represented. For fixed-fps content,
855
     * timebase should be 1/framerate and timestamp increments should be
856
     * identically 1.
857
     * - encoding: MUST be set by user.
858
     * - decoding: Set by libavcodec.
859
     */
860
    AVRational time_base;
861

    
862
    /* video only */
863
    /**
864
     * picture width / height.
865
     * - encoding: MUST be set by user.
866
     * - decoding: Set by libavcodec.
867
     * Note: For compatibility it is possible to set this instead of
868
     * coded_width/height before decoding.
869
     */
870
    int width, height;
871

    
872
#define FF_ASPECT_EXTENDED 15
873

    
874
    /**
875
     * the number of pictures in a group of pictures, or 0 for intra_only
876
     * - encoding: Set by user.
877
     * - decoding: unused
878
     */
879
    int gop_size;
880

    
881
    /**
882
     * Pixel format, see PIX_FMT_xxx.
883
     * - encoding: Set by user.
884
     * - decoding: Set by libavcodec.
885
     */
886
    enum PixelFormat pix_fmt;
887

    
888
    /**
889
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
890
     * has to read frames at native frame rate.
891
     * - encoding: Set by user.
892
     * - decoding: unused
893
     */
894
    int rate_emu;
895

    
896
    /**
897
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
898
     * decoder to draw a horizontal band. It improves cache usage. Not
899
     * all codecs can do that. You must check the codec capabilities
900
     * beforehand.
901
     * - encoding: unused
902
     * - decoding: Set by user.
903
     * @param height the height of the slice
904
     * @param y the y position of the slice
905
     * @param type 1->top field, 2->bottom field, 3->frame
906
     * @param offset offset into the AVFrame.data from which the slice should be read
907
     */
908
    void (*draw_horiz_band)(struct AVCodecContext *s,
909
                            const AVFrame *src, int offset[4],
910
                            int y, int type, int height);
911

    
912
    /* audio only */
913
    int sample_rate; ///< samples per second
914
    int channels;
915

    
916
    /**
917
     * audio sample format
918
     * - encoding: Set by user.
919
     * - decoding: Set by libavcodec.
920
     */
921
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
922

    
923
    /* The following data should not be initialized. */
924
    /**
925
     * Samples per packet, initialized when calling 'init'.
926
     */
927
    int frame_size;
928
    int frame_number;   ///< audio or video frame number
929
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
930

    
931
    /**
932
     * Number of frames the decoded output will be delayed relative to
933
     * the encoded input.
934
     * - encoding: Set by libavcodec.
935
     * - decoding: unused
936
     */
937
    int delay;
938

    
939
    /* - encoding parameters */
940
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
941
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
942

    
943
    /**
944
     * minimum quantizer
945
     * - encoding: Set by user.
946
     * - decoding: unused
947
     */
948
    int qmin;
949

    
950
    /**
951
     * maximum quantizer
952
     * - encoding: Set by user.
953
     * - decoding: unused
954
     */
955
    int qmax;
956

    
957
    /**
958
     * maximum quantizer difference between frames
959
     * - encoding: Set by user.
960
     * - decoding: unused
961
     */
962
    int max_qdiff;
963

    
964
    /**
965
     * maximum number of B-frames between non-B-frames
966
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
967
     * - encoding: Set by user.
968
     * - decoding: unused
969
     */
970
    int max_b_frames;
971

    
972
    /**
973
     * qscale factor between IP and B-frames
974
     * - encoding: Set by user.
975
     * - decoding: unused
976
     */
977
    float b_quant_factor;
978

    
979
    /** obsolete FIXME remove */
980
    int rc_strategy;
981
#define FF_RC_STRATEGY_XVID 1
982

    
983
    int b_frame_strategy;
984

    
985
    /**
986
     * hurry up amount
987
     * - encoding: unused
988
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
989
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
990
     */
991
    int hurry_up;
992

    
993
    struct AVCodec *codec;
994

    
995
    void *priv_data;
996

    
997
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
998
    /* unused, FIXME remove*/
999
    int rtp_mode;
1000
#endif
1001

    
1002
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1003
                            /* do its best to deliver a chunk with size     */
1004
                            /* below rtp_payload_size, the chunk will start */
1005
                            /* with a start code on some codecs like H.263. */
1006
                            /* This doesn't take account of any particular  */
1007
                            /* headers inside the transmitted RTP payload.  */
1008

    
1009

    
1010
    /* The RTP callback: This function is called    */
1011
    /* every time the encoder has a packet to send. */
1012
    /* It depends on the encoder if the data starts */
1013
    /* with a Start Code (it should). H.263 does.   */
1014
    /* mb_nb contains the number of macroblocks     */
1015
    /* encoded in the RTP payload.                  */
1016
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1017

    
1018
    /* statistics, used for 2-pass encoding */
1019
    int mv_bits;
1020
    int header_bits;
1021
    int i_tex_bits;
1022
    int p_tex_bits;
1023
    int i_count;
1024
    int p_count;
1025
    int skip_count;
1026
    int misc_bits;
1027

    
1028
    /**
1029
     * number of bits used for the previously encoded frame
1030
     * - encoding: Set by libavcodec.
1031
     * - decoding: unused
1032
     */
1033
    int frame_bits;
1034

    
1035
    /**
1036
     * Private data of the user, can be used to carry app specific stuff.
1037
     * - encoding: Set by user.
1038
     * - decoding: Set by user.
1039
     */
1040
    void *opaque;
1041

    
1042
    char codec_name[32];
1043
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1044
    enum CodecID codec_id; /* see CODEC_ID_xxx */
1045

    
1046
    /**
1047
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1048
     * This is used to work around some encoder bugs.
1049
     * A demuxer should set this to what is stored in the field used to identify the codec.
1050
     * If there are multiple such fields in a container then the demuxer should choose the one
1051
     * which maximizes the information about the used codec.
1052
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
1053
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1054
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1055
     * first.
1056
     * - encoding: Set by user, if not then the default based on codec_id will be used.
1057
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1058
     */
1059
    unsigned int codec_tag;
1060

    
1061
    /**
1062
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1063
     * - encoding: Set by user
1064
     * - decoding: Set by user
1065
     */
1066
    int workaround_bugs;
1067
#define FF_BUG_AUTODETECT       1  ///< autodetection
1068
#define FF_BUG_OLD_MSMPEG4      2
1069
#define FF_BUG_XVID_ILACE       4
1070
#define FF_BUG_UMP4             8
1071
#define FF_BUG_NO_PADDING       16
1072
#define FF_BUG_AMV              32
1073
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1074
#define FF_BUG_QPEL_CHROMA      64
1075
#define FF_BUG_STD_QPEL         128
1076
#define FF_BUG_QPEL_CHROMA2     256
1077
#define FF_BUG_DIRECT_BLOCKSIZE 512
1078
#define FF_BUG_EDGE             1024
1079
#define FF_BUG_HPEL_CHROMA      2048
1080
#define FF_BUG_DC_CLIP          4096
1081
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1082
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1083

    
1084
    /**
1085
     * luma single coefficient elimination threshold
1086
     * - encoding: Set by user.
1087
     * - decoding: unused
1088
     */
1089
    int luma_elim_threshold;
1090

    
1091
    /**
1092
     * chroma single coeff elimination threshold
1093
     * - encoding: Set by user.
1094
     * - decoding: unused
1095
     */
1096
    int chroma_elim_threshold;
1097

    
1098
    /**
1099
     * strictly follow the standard (MPEG4, ...).
1100
     * - encoding: Set by user.
1101
     * - decoding: unused
1102
     */
1103
    int strict_std_compliance;
1104
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1105
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1106
#define FF_COMPLIANCE_NORMAL        0
1107
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1108
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1109

    
1110
    /**
1111
     * qscale offset between IP and B-frames
1112
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1113
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1114
     * - encoding: Set by user.
1115
     * - decoding: unused
1116
     */
1117
    float b_quant_offset;
1118

    
1119
    /**
1120
     * Error resilience; higher values will detect more errors but may
1121
     * misdetect some more or less valid parts as errors.
1122
     * - encoding: unused
1123
     * - decoding: Set by user.
1124
     */
1125
    int error_resilience;
1126
#define FF_ER_CAREFUL         1
1127
#define FF_ER_COMPLIANT       2
1128
#define FF_ER_AGGRESSIVE      3
1129
#define FF_ER_VERY_AGGRESSIVE 4
1130

    
1131
    /**
1132
     * Called at the beginning of each frame to get a buffer for it.
1133
     * If pic.reference is set then the frame will be read later by libavcodec.
1134
     * avcodec_align_dimensions() should be used to find the required width and
1135
     * height, as they normally need to be rounded up to the next multiple of 16.
1136
     * - encoding: unused
1137
     * - decoding: Set by libavcodec., user can override.
1138
     */
1139
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1140

    
1141
    /**
1142
     * Called to release buffers which were allocated with get_buffer.
1143
     * A released buffer can be reused in get_buffer().
1144
     * pic.data[*] must be set to NULL.
1145
     * - encoding: unused
1146
     * - decoding: Set by libavcodec., user can override.
1147
     */
1148
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1149

    
1150
    /**
1151
     * If 1 the stream has a 1 frame delay during decoding.
1152
     * - encoding: Set by libavcodec.
1153
     * - decoding: Set by libavcodec.
1154
     */
1155
    int has_b_frames;
1156

    
1157
    /**
1158
     * number of bytes per packet if constant and known or 0
1159
     * Used by some WAV based audio codecs.
1160
     */
1161
    int block_align;
1162

    
1163
    int parse_only; /* - decoding only: If true, only parsing is done
1164
                       (function avcodec_parse_frame()). The frame
1165
                       data is returned. Only MPEG codecs support this now. */
1166

    
1167
    /**
1168
     * 0-> h263 quant 1-> mpeg quant
1169
     * - encoding: Set by user.
1170
     * - decoding: unused
1171
     */
1172
    int mpeg_quant;
1173

    
1174
    /**
1175
     * pass1 encoding statistics output buffer
1176
     * - encoding: Set by libavcodec.
1177
     * - decoding: unused
1178
     */
1179
    char *stats_out;
1180

    
1181
    /**
1182
     * pass2 encoding statistics input buffer
1183
     * Concatenated stuff from stats_out of pass1 should be placed here.
1184
     * - encoding: Allocated/set/freed by user.
1185
     * - decoding: unused
1186
     */
1187
    char *stats_in;
1188

    
1189
    /**
1190
     * ratecontrol qmin qmax limiting method
1191
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1192
     * - encoding: Set by user.
1193
     * - decoding: unused
1194
     */
1195
    float rc_qsquish;
1196

    
1197
    float rc_qmod_amp;
1198
    int rc_qmod_freq;
1199

    
1200
    /**
1201
     * ratecontrol override, see RcOverride
1202
     * - encoding: Allocated/set/freed by user.
1203
     * - decoding: unused
1204
     */
1205
    RcOverride *rc_override;
1206
    int rc_override_count;
1207

    
1208
    /**
1209
     * rate control equation
1210
     * - encoding: Set by user
1211
     * - decoding: unused
1212
     */
1213
    const char *rc_eq;
1214

    
1215
    /**
1216
     * maximum bitrate
1217
     * - encoding: Set by user.
1218
     * - decoding: unused
1219
     */
1220
    int rc_max_rate;
1221

    
1222
    /**
1223
     * minimum bitrate
1224
     * - encoding: Set by user.
1225
     * - decoding: unused
1226
     */
1227
    int rc_min_rate;
1228

    
1229
    /**
1230
     * decoder bitstream buffer size
1231
     * - encoding: Set by user.
1232
     * - decoding: unused
1233
     */
1234
    int rc_buffer_size;
1235
    float rc_buffer_aggressivity;
1236

    
1237
    /**
1238
     * qscale factor between P and I-frames
1239
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1240
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1241
     * - encoding: Set by user.
1242
     * - decoding: unused
1243
     */
1244
    float i_quant_factor;
1245

    
1246
    /**
1247
     * qscale offset between P and I-frames
1248
     * - encoding: Set by user.
1249
     * - decoding: unused
1250
     */
1251
    float i_quant_offset;
1252

    
1253
    /**
1254
     * initial complexity for pass1 ratecontrol
1255
     * - encoding: Set by user.
1256
     * - decoding: unused
1257
     */
1258
    float rc_initial_cplx;
1259

    
1260
    /**
1261
     * DCT algorithm, see FF_DCT_* below
1262
     * - encoding: Set by user.
1263
     * - decoding: unused
1264
     */
1265
    int dct_algo;
1266
#define FF_DCT_AUTO    0
1267
#define FF_DCT_FASTINT 1
1268
#define FF_DCT_INT     2
1269
#define FF_DCT_MMX     3
1270
#define FF_DCT_MLIB    4
1271
#define FF_DCT_ALTIVEC 5
1272
#define FF_DCT_FAAN    6
1273

    
1274
    /**
1275
     * luminance masking (0-> disabled)
1276
     * - encoding: Set by user.
1277
     * - decoding: unused
1278
     */
1279
    float lumi_masking;
1280

    
1281
    /**
1282
     * temporary complexity masking (0-> disabled)
1283
     * - encoding: Set by user.
1284
     * - decoding: unused
1285
     */
1286
    float temporal_cplx_masking;
1287

    
1288
    /**
1289
     * spatial complexity masking (0-> disabled)
1290
     * - encoding: Set by user.
1291
     * - decoding: unused
1292
     */
1293
    float spatial_cplx_masking;
1294

    
1295
    /**
1296
     * p block masking (0-> disabled)
1297
     * - encoding: Set by user.
1298
     * - decoding: unused
1299
     */
1300
    float p_masking;
1301

    
1302
    /**
1303
     * darkness masking (0-> disabled)
1304
     * - encoding: Set by user.
1305
     * - decoding: unused
1306
     */
1307
    float dark_masking;
1308

    
1309

    
1310
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1311
    /* for binary compatibility */
1312
    int unused;
1313
#endif
1314

    
1315
    /**
1316
     * IDCT algorithm, see FF_IDCT_* below.
1317
     * - encoding: Set by user.
1318
     * - decoding: Set by user.
1319
     */
1320
    int idct_algo;
1321
#define FF_IDCT_AUTO          0
1322
#define FF_IDCT_INT           1
1323
#define FF_IDCT_SIMPLE        2
1324
#define FF_IDCT_SIMPLEMMX     3
1325
#define FF_IDCT_LIBMPEG2MMX   4
1326
#define FF_IDCT_PS2           5
1327
#define FF_IDCT_MLIB          6
1328
#define FF_IDCT_ARM           7
1329
#define FF_IDCT_ALTIVEC       8
1330
#define FF_IDCT_SH4           9
1331
#define FF_IDCT_SIMPLEARM     10
1332
#define FF_IDCT_H264          11
1333
#define FF_IDCT_VP3           12
1334
#define FF_IDCT_IPP           13
1335
#define FF_IDCT_XVIDMMX       14
1336
#define FF_IDCT_CAVS          15
1337
#define FF_IDCT_SIMPLEARMV5TE 16
1338
#define FF_IDCT_SIMPLEARMV6   17
1339
#define FF_IDCT_SIMPLEVIS     18
1340
#define FF_IDCT_WMV2          19
1341
#define FF_IDCT_FAAN          20
1342

    
1343
    /**
1344
     * slice count
1345
     * - encoding: Set by libavcodec.
1346
     * - decoding: Set by user (or 0).
1347
     */
1348
    int slice_count;
1349
    /**
1350
     * slice offsets in the frame in bytes
1351
     * - encoding: Set/allocated by libavcodec.
1352
     * - decoding: Set/allocated by user (or NULL).
1353
     */
1354
    int *slice_offset;
1355

    
1356
    /**
1357
     * error concealment flags
1358
     * - encoding: unused
1359
     * - decoding: Set by user.
1360
     */
1361
    int error_concealment;
1362
#define FF_EC_GUESS_MVS   1
1363
#define FF_EC_DEBLOCK     2
1364

    
1365
    /**
1366
     * dsp_mask could be add used to disable unwanted CPU features
1367
     * CPU features (i.e. MMX, SSE. ...)
1368
     *
1369
     * With the FORCE flag you may instead enable given CPU features.
1370
     * (Dangerous: Usable in case of misdetection, improper usage however will
1371
     * result into program crash.)
1372
     */
1373
    unsigned dsp_mask;
1374
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1375
    /* lower 16 bits - CPU features */
1376
#define FF_MM_MMX      0x0001 ///< standard MMX
1377
#define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1378
#define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1379
#define FF_MM_SSE      0x0008 ///< SSE functions
1380
#define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1381
#define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1382
#define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1383
#define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1384
#define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1385

    
1386
    /**
1387
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1388
     * - encoding: Set by libavcodec.
1389
     * - decoding: Set by user.
1390
     */
1391
     int bits_per_sample;
1392

    
1393
    /**
1394
     * prediction method (needed for huffyuv)
1395
     * - encoding: Set by user.
1396
     * - decoding: unused
1397
     */
1398
     int prediction_method;
1399
#define FF_PRED_LEFT   0
1400
#define FF_PRED_PLANE  1
1401
#define FF_PRED_MEDIAN 2
1402

    
1403
    /**
1404
     * sample aspect ratio (0 if unknown)
1405
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1406
     * - encoding: Set by user.
1407
     * - decoding: Set by libavcodec.
1408
     */
1409
    AVRational sample_aspect_ratio;
1410

    
1411
    /**
1412
     * the picture in the bitstream
1413
     * - encoding: Set by libavcodec.
1414
     * - decoding: Set by libavcodec.
1415
     */
1416
    AVFrame *coded_frame;
1417

    
1418
    /**
1419
     * debug
1420
     * - encoding: Set by user.
1421
     * - decoding: Set by user.
1422
     */
1423
    int debug;
1424
#define FF_DEBUG_PICT_INFO   1
1425
#define FF_DEBUG_RC          2
1426
#define FF_DEBUG_BITSTREAM   4
1427
#define FF_DEBUG_MB_TYPE     8
1428
#define FF_DEBUG_QP          16
1429
#define FF_DEBUG_MV          32
1430
#define FF_DEBUG_DCT_COEFF   0x00000040
1431
#define FF_DEBUG_SKIP        0x00000080
1432
#define FF_DEBUG_STARTCODE   0x00000100
1433
#define FF_DEBUG_PTS         0x00000200
1434
#define FF_DEBUG_ER          0x00000400
1435
#define FF_DEBUG_MMCO        0x00000800
1436
#define FF_DEBUG_BUGS        0x00001000
1437
#define FF_DEBUG_VIS_QP      0x00002000
1438
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1439

    
1440
    /**
1441
     * debug
1442
     * - encoding: Set by user.
1443
     * - decoding: Set by user.
1444
     */
1445
    int debug_mv;
1446
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1447
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1448
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1449

    
1450
    /**
1451
     * error
1452
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1453
     * - decoding: unused
1454
     */
1455
    uint64_t error[4];
1456

    
1457
    /**
1458
     * minimum MB quantizer
1459
     * - encoding: unused
1460
     * - decoding: unused
1461
     */
1462
    int mb_qmin;
1463

    
1464
    /**
1465
     * maximum MB quantizer
1466
     * - encoding: unused
1467
     * - decoding: unused
1468
     */
1469
    int mb_qmax;
1470

    
1471
    /**
1472
     * motion estimation comparison function
1473
     * - encoding: Set by user.
1474
     * - decoding: unused
1475
     */
1476
    int me_cmp;
1477
    /**
1478
     * subpixel motion estimation comparison function
1479
     * - encoding: Set by user.
1480
     * - decoding: unused
1481
     */
1482
    int me_sub_cmp;
1483
    /**
1484
     * macroblock comparison function (not supported yet)
1485
     * - encoding: Set by user.
1486
     * - decoding: unused
1487
     */
1488
    int mb_cmp;
1489
    /**
1490
     * interlaced DCT comparison function
1491
     * - encoding: Set by user.
1492
     * - decoding: unused
1493
     */
1494
    int ildct_cmp;
1495
#define FF_CMP_SAD    0
1496
#define FF_CMP_SSE    1
1497
#define FF_CMP_SATD   2
1498
#define FF_CMP_DCT    3
1499
#define FF_CMP_PSNR   4
1500
#define FF_CMP_BIT    5
1501
#define FF_CMP_RD     6
1502
#define FF_CMP_ZERO   7
1503
#define FF_CMP_VSAD   8
1504
#define FF_CMP_VSSE   9
1505
#define FF_CMP_NSSE   10
1506
#define FF_CMP_W53    11
1507
#define FF_CMP_W97    12
1508
#define FF_CMP_DCTMAX 13
1509
#define FF_CMP_DCT264 14
1510
#define FF_CMP_CHROMA 256
1511

    
1512
    /**
1513
     * ME diamond size & shape
1514
     * - encoding: Set by user.
1515
     * - decoding: unused
1516
     */
1517
    int dia_size;
1518

    
1519
    /**
1520
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1521
     * - encoding: Set by user.
1522
     * - decoding: unused
1523
     */
1524
    int last_predictor_count;
1525

    
1526
    /**
1527
     * prepass for motion estimation
1528
     * - encoding: Set by user.
1529
     * - decoding: unused
1530
     */
1531
    int pre_me;
1532

    
1533
    /**
1534
     * motion estimation prepass comparison function
1535
     * - encoding: Set by user.
1536
     * - decoding: unused
1537
     */
1538
    int me_pre_cmp;
1539

    
1540
    /**
1541
     * ME prepass diamond size & shape
1542
     * - encoding: Set by user.
1543
     * - decoding: unused
1544
     */
1545
    int pre_dia_size;
1546

    
1547
    /**
1548
     * subpel ME quality
1549
     * - encoding: Set by user.
1550
     * - decoding: unused
1551
     */
1552
    int me_subpel_quality;
1553

    
1554
    /**
1555
     * callback to negotiate the pixelFormat
1556
     * @param fmt is the list of formats which are supported by the codec,
1557
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1558
     * The first is always the native one.
1559
     * @return the chosen format
1560
     * - encoding: unused
1561
     * - decoding: Set by user, if not set the native format will be chosen.
1562
     */
1563
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1564

    
1565
    /**
1566
     * DTG active format information (additional aspect ratio
1567
     * information only used in DVB MPEG-2 transport streams)
1568
     * 0 if not set.
1569
     *
1570
     * - encoding: unused
1571
     * - decoding: Set by decoder.
1572
     */
1573
    int dtg_active_format;
1574
#define FF_DTG_AFD_SAME         8
1575
#define FF_DTG_AFD_4_3          9
1576
#define FF_DTG_AFD_16_9         10
1577
#define FF_DTG_AFD_14_9         11
1578
#define FF_DTG_AFD_4_3_SP_14_9  13
1579
#define FF_DTG_AFD_16_9_SP_14_9 14
1580
#define FF_DTG_AFD_SP_4_3       15
1581

    
1582
    /**
1583
     * maximum motion estimation search range in subpel units
1584
     * If 0 then no limit.
1585
     *
1586
     * - encoding: Set by user.
1587
     * - decoding: unused
1588
     */
1589
    int me_range;
1590

    
1591
    /**
1592
     * intra quantizer bias
1593
     * - encoding: Set by user.
1594
     * - decoding: unused
1595
     */
1596
    int intra_quant_bias;
1597
#define FF_DEFAULT_QUANT_BIAS 999999
1598

    
1599
    /**
1600
     * inter quantizer bias
1601
     * - encoding: Set by user.
1602
     * - decoding: unused
1603
     */
1604
    int inter_quant_bias;
1605

    
1606
    /**
1607
     * color table ID
1608
     * - encoding: unused
1609
     * - decoding: Which clrtable should be used for 8bit RGB images.
1610
     *             Tables have to be stored somewhere. FIXME
1611
     */
1612
    int color_table_id;
1613

    
1614
    /**
1615
     * internal_buffer count
1616
     * Don't touch, used by libavcodec default_get_buffer().
1617
     */
1618
    int internal_buffer_count;
1619

    
1620
    /**
1621
     * internal_buffers
1622
     * Don't touch, used by libavcodec default_get_buffer().
1623
     */
1624
    void *internal_buffer;
1625

    
1626
#define FF_LAMBDA_SHIFT 7
1627
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1628
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1629
#define FF_LAMBDA_MAX (256*128-1)
1630

    
1631
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1632
    /**
1633
     * Global quality for codecs which cannot change it per frame.
1634
     * This should be proportional to MPEG-1/2/4 qscale.
1635
     * - encoding: Set by user.
1636
     * - decoding: unused
1637
     */
1638
    int global_quality;
1639

    
1640
#define FF_CODER_TYPE_VLC       0
1641
#define FF_CODER_TYPE_AC        1
1642
#define FF_CODER_TYPE_RAW       2
1643
#define FF_CODER_TYPE_RLE       3
1644
#define FF_CODER_TYPE_DEFLATE   4
1645
    /**
1646
     * coder type
1647
     * - encoding: Set by user.
1648
     * - decoding: unused
1649
     */
1650
    int coder_type;
1651

    
1652
    /**
1653
     * context model
1654
     * - encoding: Set by user.
1655
     * - decoding: unused
1656
     */
1657
    int context_model;
1658
#if 0
1659
    /**
1660
     *
1661
     * - encoding: unused
1662
     * - decoding: Set by user.
1663
     */
1664
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1665
#endif
1666

    
1667
    /**
1668
     * slice flags
1669
     * - encoding: unused
1670
     * - decoding: Set by user.
1671
     */
1672
    int slice_flags;
1673
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1674
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1675
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1676

    
1677
    /**
1678
     * XVideo Motion Acceleration
1679
     * - encoding: forbidden
1680
     * - decoding: set by decoder
1681
     */
1682
    int xvmc_acceleration;
1683

    
1684
    /**
1685
     * macroblock decision mode
1686
     * - encoding: Set by user.
1687
     * - decoding: unused
1688
     */
1689
    int mb_decision;
1690
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1691
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1692
#define FF_MB_DECISION_RD     2        ///< rate distoration
1693

    
1694
    /**
1695
     * custom intra quantization matrix
1696
     * - encoding: Set by user, can be NULL.
1697
     * - decoding: Set by libavcodec.
1698
     */
1699
    uint16_t *intra_matrix;
1700

    
1701
    /**
1702
     * custom inter quantization matrix
1703
     * - encoding: Set by user, can be NULL.
1704
     * - decoding: Set by libavcodec.
1705
     */
1706
    uint16_t *inter_matrix;
1707

    
1708
    /**
1709
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1710
     * This is used to work around some encoder bugs.
1711
     * - encoding: unused
1712
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1713
     */
1714
    unsigned int stream_codec_tag;
1715

    
1716
    /**
1717
     * scene change detection threshold
1718
     * 0 is default, larger means fewer detected scene changes.
1719
     * - encoding: Set by user.
1720
     * - decoding: unused
1721
     */
1722
    int scenechange_threshold;
1723

    
1724
    /**
1725
     * minimum Lagrange multipler
1726
     * - encoding: Set by user.
1727
     * - decoding: unused
1728
     */
1729
    int lmin;
1730

    
1731
    /**
1732
     * maximum Lagrange multipler
1733
     * - encoding: Set by user.
1734
     * - decoding: unused
1735
     */
1736
    int lmax;
1737

    
1738
    /**
1739
     * palette control structure
1740
     * - encoding: ??? (no palette-enabled encoder yet)
1741
     * - decoding: Set by user.
1742
     */
1743
    struct AVPaletteControl *palctrl;
1744

    
1745
    /**
1746
     * noise reduction strength
1747
     * - encoding: Set by user.
1748
     * - decoding: unused
1749
     */
1750
    int noise_reduction;
1751

    
1752
    /**
1753
     * Called at the beginning of a frame to get cr buffer for it.
1754
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1755
     * libavcodec will pass previous buffer in pic, function should return
1756
     * same buffer or new buffer with old frame "painted" into it.
1757
     * If pic.data[0] == NULL must behave like get_buffer().
1758
     * - encoding: unused
1759
     * - decoding: Set by libavcodec., user can override
1760
     */
1761
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1762

    
1763
    /**
1764
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1765
     * - encoding: Set by user.
1766
     * - decoding: unused
1767
     */
1768
    int rc_initial_buffer_occupancy;
1769

    
1770
    /**
1771
     *
1772
     * - encoding: Set by user.
1773
     * - decoding: unused
1774
     */
1775
    int inter_threshold;
1776

    
1777
    /**
1778
     * CODEC_FLAG2_*
1779
     * - encoding: Set by user.
1780
     * - decoding: Set by user.
1781
     */
1782
    int flags2;
1783

    
1784
    /**
1785
     * Simulates errors in the bitstream to test error concealment.
1786
     * - encoding: Set by user.
1787
     * - decoding: unused
1788
     */
1789
    int error_rate;
1790

    
1791
    /**
1792
     * MP3 antialias algorithm, see FF_AA_* below.
1793
     * - encoding: unused
1794
     * - decoding: Set by user.
1795
     */
1796
    int antialias_algo;
1797
#define FF_AA_AUTO    0
1798
#define FF_AA_FASTINT 1 //not implemented yet
1799
#define FF_AA_INT     2
1800
#define FF_AA_FLOAT   3
1801
    /**
1802
     * quantizer noise shaping
1803
     * - encoding: Set by user.
1804
     * - decoding: unused
1805
     */
1806
    int quantizer_noise_shaping;
1807

    
1808
    /**
1809
     * thread count
1810
     * is used to decide how many independent tasks should be passed to execute()
1811
     * - encoding: Set by user.
1812
     * - decoding: Set by user.
1813
     */
1814
    int thread_count;
1815

    
1816
    /**
1817
     * The codec may call this to execute several independent things.
1818
     * It will return only after finishing all tasks.
1819
     * The user may replace this with some multithreaded implementation,
1820
     * the default implementation will execute the parts serially.
1821
     * @param count the number of things to execute
1822
     * - encoding: Set by libavcodec, user can override.
1823
     * - decoding: Set by libavcodec, user can override.
1824
     */
1825
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1826

    
1827
    /**
1828
     * thread opaque
1829
     * Can be used by execute() to store some per AVCodecContext stuff.
1830
     * - encoding: set by execute()
1831
     * - decoding: set by execute()
1832
     */
1833
    void *thread_opaque;
1834

    
1835
    /**
1836
     * Motion estimation threshold below which no motion estimation is
1837
     * performed, but instead the user specified motion vectors are used.
1838
     *
1839
     * - encoding: Set by user.
1840
     * - decoding: unused
1841
     */
1842
     int me_threshold;
1843

    
1844
    /**
1845
     * Macroblock threshold below which the user specified macroblock types will be used.
1846
     * - encoding: Set by user.
1847
     * - decoding: unused
1848
     */
1849
     int mb_threshold;
1850

    
1851
    /**
1852
     * precision of the intra DC coefficient - 8
1853
     * - encoding: Set by user.
1854
     * - decoding: unused
1855
     */
1856
     int intra_dc_precision;
1857

    
1858
    /**
1859
     * noise vs. sse weight for the nsse comparsion function
1860
     * - encoding: Set by user.
1861
     * - decoding: unused
1862
     */
1863
     int nsse_weight;
1864

    
1865
    /**
1866
     * Number of macroblock rows at the top which are skipped.
1867
     * - encoding: unused
1868
     * - decoding: Set by user.
1869
     */
1870
     int skip_top;
1871

    
1872
    /**
1873
     * Number of macroblock rows at the bottom which are skipped.
1874
     * - encoding: unused
1875
     * - decoding: Set by user.
1876
     */
1877
     int skip_bottom;
1878

    
1879
    /**
1880
     * profile
1881
     * - encoding: Set by user.
1882
     * - decoding: Set by libavcodec.
1883
     */
1884
     int profile;
1885
#define FF_PROFILE_UNKNOWN -99
1886
#define FF_PROFILE_AAC_MAIN 0
1887
#define FF_PROFILE_AAC_LOW  1
1888
#define FF_PROFILE_AAC_SSR  2
1889
#define FF_PROFILE_AAC_LTP  3
1890

    
1891
    /**
1892
     * level
1893
     * - encoding: Set by user.
1894
     * - decoding: Set by libavcodec.
1895
     */
1896
     int level;
1897
#define FF_LEVEL_UNKNOWN -99
1898

    
1899
    /**
1900
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1901
     * - encoding: unused
1902
     * - decoding: Set by user.
1903
     */
1904
     int lowres;
1905

    
1906
    /**
1907
     * Bitstream width / height, may be different from width/height if lowres
1908
     * or other things are used.
1909
     * - encoding: unused
1910
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1911
     */
1912
    int coded_width, coded_height;
1913

    
1914
    /**
1915
     * frame skip threshold
1916
     * - encoding: Set by user.
1917
     * - decoding: unused
1918
     */
1919
    int frame_skip_threshold;
1920

    
1921
    /**
1922
     * frame skip factor
1923
     * - encoding: Set by user.
1924
     * - decoding: unused
1925
     */
1926
    int frame_skip_factor;
1927

    
1928
    /**
1929
     * frame skip exponent
1930
     * - encoding: Set by user.
1931
     * - decoding: unused
1932
     */
1933
    int frame_skip_exp;
1934

    
1935
    /**
1936
     * frame skip comparison function
1937
     * - encoding: Set by user.
1938
     * - decoding: unused
1939
     */
1940
    int frame_skip_cmp;
1941

    
1942
    /**
1943
     * Border processing masking, raises the quantizer for mbs on the borders
1944
     * of the picture.
1945
     * - encoding: Set by user.
1946
     * - decoding: unused
1947
     */
1948
    float border_masking;
1949

    
1950
    /**
1951
     * minimum MB lagrange multipler
1952
     * - encoding: Set by user.
1953
     * - decoding: unused
1954
     */
1955
    int mb_lmin;
1956

    
1957
    /**
1958
     * maximum MB lagrange multipler
1959
     * - encoding: Set by user.
1960
     * - decoding: unused
1961
     */
1962
    int mb_lmax;
1963

    
1964
    /**
1965
     *
1966
     * - encoding: Set by user.
1967
     * - decoding: unused
1968
     */
1969
    int me_penalty_compensation;
1970

    
1971
    /**
1972
     *
1973
     * - encoding: unused
1974
     * - decoding: Set by user.
1975
     */
1976
    enum AVDiscard skip_loop_filter;
1977

    
1978
    /**
1979
     *
1980
     * - encoding: unused
1981
     * - decoding: Set by user.
1982
     */
1983
    enum AVDiscard skip_idct;
1984

    
1985
    /**
1986
     *
1987
     * - encoding: unused
1988
     * - decoding: Set by user.
1989
     */
1990
    enum AVDiscard skip_frame;
1991

    
1992
    /**
1993
     *
1994
     * - encoding: Set by user.
1995
     * - decoding: unused
1996
     */
1997
    int bidir_refine;
1998

    
1999
    /**
2000
     *
2001
     * - encoding: Set by user.
2002
     * - decoding: unused
2003
     */
2004
    int brd_scale;
2005

    
2006
    /**
2007
     * constant rate factor - quality-based VBR - values ~correspond to qps
2008
     * - encoding: Set by user.
2009
     * - decoding: unused
2010
     */
2011
    float crf;
2012

    
2013
    /**
2014
     * constant quantization parameter rate control method
2015
     * - encoding: Set by user.
2016
     * - decoding: unused
2017
     */
2018
    int cqp;
2019

    
2020
    /**
2021
     * minimum GOP size
2022
     * - encoding: Set by user.
2023
     * - decoding: unused
2024
     */
2025
    int keyint_min;
2026

    
2027
    /**
2028
     * number of reference frames
2029
     * - encoding: Set by user.
2030
     * - decoding: unused
2031
     */
2032
    int refs;
2033

    
2034
    /**
2035
     * chroma qp offset from luma
2036
     * - encoding: Set by user.
2037
     * - decoding: unused
2038
     */
2039
    int chromaoffset;
2040

    
2041
    /**
2042
     * Influences how often B-frames are used.
2043
     * - encoding: Set by user.
2044
     * - decoding: unused
2045
     */
2046
    int bframebias;
2047

    
2048
    /**
2049
     * trellis RD quantization
2050
     * - encoding: Set by user.
2051
     * - decoding: unused
2052
     */
2053
    int trellis;
2054

    
2055
    /**
2056
     * Reduce fluctuations in qp (before curve compression).
2057
     * - encoding: Set by user.
2058
     * - decoding: unused
2059
     */
2060
    float complexityblur;
2061

    
2062
    /**
2063
     * in-loop deblocking filter alphac0 parameter
2064
     * alpha is in the range -6...6
2065
     * - encoding: Set by user.
2066
     * - decoding: unused
2067
     */
2068
    int deblockalpha;
2069

    
2070
    /**
2071
     * in-loop deblocking filter beta parameter
2072
     * beta is in the range -6...6
2073
     * - encoding: Set by user.
2074
     * - decoding: unused
2075
     */
2076
    int deblockbeta;
2077

    
2078
    /**
2079
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2080
     * - encoding: Set by user.
2081
     * - decoding: unused
2082
     */
2083
    int partitions;
2084
#define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2085
#define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2086
#define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2087
#define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2088
#define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2089

    
2090
    /**
2091
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2092
     * - encoding: Set by user.
2093
     * - decoding: unused
2094
     */
2095
    int directpred;
2096

    
2097
    /**
2098
     * Audio cutoff bandwidth (0 means "automatic")
2099
     * - encoding: Set by user.
2100
     * - decoding: unused
2101
     */
2102
    int cutoff;
2103

    
2104
    /**
2105
     * Multiplied by qscale for each frame and added to scene_change_score.
2106
     * - encoding: Set by user.
2107
     * - decoding: unused
2108
     */
2109
    int scenechange_factor;
2110

    
2111
    /**
2112
     *
2113
     * Note: Value depends upon the compare function used for fullpel ME.
2114
     * - encoding: Set by user.
2115
     * - decoding: unused
2116
     */
2117
    int mv0_threshold;
2118

    
2119
    /**
2120
     * Adjusts sensitivity of b_frame_strategy 1.
2121
     * - encoding: Set by user.
2122
     * - decoding: unused
2123
     */
2124
    int b_sensitivity;
2125

    
2126
    /**
2127
     * - encoding: Set by user.
2128
     * - decoding: unused
2129
     */
2130
    int compression_level;
2131
#define FF_COMPRESSION_DEFAULT -1
2132

    
2133
    /**
2134
     * Sets whether to use LPC mode - used by FLAC encoder.
2135
     * - encoding: Set by user.
2136
     * - decoding: unused
2137
     */
2138
    int use_lpc;
2139

    
2140
    /**
2141
     * LPC coefficient precision - used by FLAC encoder
2142
     * - encoding: Set by user.
2143
     * - decoding: unused
2144
     */
2145
    int lpc_coeff_precision;
2146

    
2147
    /**
2148
     * - encoding: Set by user.
2149
     * - decoding: unused
2150
     */
2151
    int min_prediction_order;
2152

    
2153
    /**
2154
     * - encoding: Set by user.
2155
     * - decoding: unused
2156
     */
2157
    int max_prediction_order;
2158

    
2159
    /**
2160
     * search method for selecting prediction order
2161
     * - encoding: Set by user.
2162
     * - decoding: unused
2163
     */
2164
    int prediction_order_method;
2165

    
2166
    /**
2167
     * - encoding: Set by user.
2168
     * - decoding: unused
2169
     */
2170
    int min_partition_order;
2171

    
2172
    /**
2173
     * - encoding: Set by user.
2174
     * - decoding: unused
2175
     */
2176
    int max_partition_order;
2177

    
2178
    /**
2179
     * GOP timecode frame start number, in non drop frame format
2180
     * - encoding: Set by user.
2181
     * - decoding: unused
2182
     */
2183
    int64_t timecode_frame_start;
2184

    
2185
    /**
2186
     * Decoder should decode to this many channels if it can (0 for default)
2187
     * - encoding: unused
2188
     * - decoding: Set by user.
2189
     */
2190
    int request_channels;
2191

    
2192
    /**
2193
     * Percentage of dynamic range compression to be applied by the decoder.
2194
     * The default value is 1.0, corresponding to full compression.
2195
     * - encoding: unused
2196
     * - decoding: Set by user.
2197
     */
2198
    float drc_scale;
2199
} AVCodecContext;
2200

    
2201
/**
2202
 * AVCodec.
2203
 */
2204
typedef struct AVCodec {
2205
    /**
2206
     * Name of the codec implementation.
2207
     * The name is globally unique among encoders and among decoders (but an
2208
     * encoder and a decoder can share the same name).
2209
     * This is the primary way to find a codec from the user perspective.
2210
     */
2211
    const char *name;
2212
    enum CodecType type;
2213
    enum CodecID id;
2214
    int priv_data_size;
2215
    int (*init)(AVCodecContext *);
2216
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2217
    int (*close)(AVCodecContext *);
2218
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2219
                  const uint8_t *buf, int buf_size);
2220
    int capabilities;
2221
    struct AVCodec *next;
2222
    void (*flush)(AVCodecContext *);
2223
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2224
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2225
} AVCodec;
2226

    
2227
/**
2228
 * four components are given, that's all.
2229
 * the last component is alpha
2230
 */
2231
typedef struct AVPicture {
2232
    uint8_t *data[4];
2233
    int linesize[4];       ///< number of bytes per line
2234
} AVPicture;
2235

    
2236
/**
2237
 * AVPaletteControl
2238
 * This structure defines a method for communicating palette changes
2239
 * between and demuxer and a decoder.
2240
 *
2241
 * @deprecated Use AVPacket to send palette changes instead.
2242
 * This is totally broken.
2243
 */
2244
#define AVPALETTE_SIZE 1024
2245
#define AVPALETTE_COUNT 256
2246
typedef struct AVPaletteControl {
2247

    
2248
    /* Demuxer sets this to 1 to indicate the palette has changed;
2249
     * decoder resets to 0. */
2250
    int palette_changed;
2251

    
2252
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2253
     * the individual palette components should be on a 8-bit scale; if
2254
     * the palette data comes from an IBM VGA native format, the component
2255
     * data is probably 6 bits in size and needs to be scaled. */
2256
    unsigned int palette[AVPALETTE_COUNT];
2257

    
2258
} AVPaletteControl attribute_deprecated;
2259

    
2260
typedef struct AVSubtitleRect {
2261
    uint16_t x;
2262
    uint16_t y;
2263
    uint16_t w;
2264
    uint16_t h;
2265
    uint16_t nb_colors;
2266
    int linesize;
2267
    uint32_t *rgba_palette;
2268
    uint8_t *bitmap;
2269
} AVSubtitleRect;
2270

    
2271
typedef struct AVSubtitle {
2272
    uint16_t format; /* 0 = graphics */
2273
    uint32_t start_display_time; /* relative to packet pts, in ms */
2274
    uint32_t end_display_time; /* relative to packet pts, in ms */
2275
    uint32_t num_rects;
2276
    AVSubtitleRect *rects;
2277
} AVSubtitle;
2278

    
2279

    
2280
/* resample.c */
2281

    
2282
struct ReSampleContext;
2283
struct AVResampleContext;
2284

    
2285
typedef struct ReSampleContext ReSampleContext;
2286

    
2287
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2288
                                     int output_rate, int input_rate);
2289
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2290
void audio_resample_close(ReSampleContext *s);
2291

    
2292
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2293
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2294
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2295
void av_resample_close(struct AVResampleContext *c);
2296

    
2297
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2298
/* YUV420 format is assumed ! */
2299

    
2300
/**
2301
 * @deprecated Use the software scaler (swscale) instead.
2302
 */
2303
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2304

    
2305
/**
2306
 * @deprecated Use the software scaler (swscale) instead.
2307
 */
2308
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2309
                                      int input_width, int input_height);
2310

    
2311
/**
2312
 * @deprecated Use the software scaler (swscale) instead.
2313
 */
2314
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2315
                                      int iwidth, int iheight,
2316
                                      int topBand, int bottomBand,
2317
                                      int leftBand, int rightBand,
2318
                                      int padtop, int padbottom,
2319
                                      int padleft, int padright);
2320

    
2321
/**
2322
 * @deprecated Use the software scaler (swscale) instead.
2323
 */
2324
attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2325
                  AVPicture *output, const AVPicture *input);
2326

    
2327
/**
2328
 * @deprecated Use the software scaler (swscale) instead.
2329
 */
2330
attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2331

    
2332
#endif
2333

    
2334
/**
2335
 * Allocate memory for a picture.  Call avpicture_free to free it.
2336
 *
2337
 * @param picture the picture to be filled in
2338
 * @param pix_fmt the format of the picture
2339
 * @param width the width of the picture
2340
 * @param height the height of the picture
2341
 * @return zero if successful, a negative value if not
2342
 */
2343
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2344

    
2345
/**
2346
 * Free a picture previously allocated by avpicture_alloc().
2347
 *
2348
 * @param picture the AVPicture to be freed
2349
 */
2350
void avpicture_free(AVPicture *picture);
2351

    
2352
/**
2353
 * Fill in the AVPicture fields.
2354
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2355
 * which points to the image data buffer. Depending on the specified picture
2356
 * format, one or multiple image data pointers and line sizes will be set.
2357
 * If a planar format is specified, several pointers will be set pointing to
2358
 * the different picture planes and the line sizes of the different planes
2359
 * will be stored in the lines_sizes array.
2360
 *
2361
 * @param picture AVPicture whose fields are to be filled in
2362
 * @param ptr Buffer which will contain or contains the actual image data
2363
 * @param pix_fmt The format in which the picture data is stored.
2364
 * @param width the width of the image in pixels
2365
 * @param height the height of the image in pixels
2366
 * @return size of the image data in bytes
2367
 */
2368
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2369
                   int pix_fmt, int width, int height);
2370
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2371
                     unsigned char *dest, int dest_size);
2372

    
2373
/**
2374
 * Calculate the size in bytes that a picture of the given width and height
2375
 * would occupy if stored in the given picture format.
2376
 *
2377
 * @param pix_fmt the given picture format
2378
 * @param width the width of the image
2379
 * @param height the height of the image
2380
 * @return Image data size in bytes
2381
 */
2382
int avpicture_get_size(int pix_fmt, int width, int height);
2383
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2384
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2385
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2386
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2387
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2388

    
2389
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2390
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2391
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2392
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2393
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2394
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2395

    
2396
/**
2397
 * Computes what kind of losses will occur when converting from one specific
2398
 * pixel format to another.
2399
 * When converting from one pixel format to another, information loss may occur.
2400
 * For example, when converting from RGB24 to GRAY, the color information will
2401
 * be lost. Similarly, other losses occur when converting from some formats to
2402
 * other formats. These losses can involve loss of chroma, but also loss of
2403
 * resolution, loss of color depth, loss due to the color space conversion, loss
2404
 * of the alpha bits or loss due to color quantization.
2405
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2406
 * which will occur when converting from one pixel format to another.
2407
 *
2408
 * @param[in] dst_pix_fmt destination pixel format
2409
 * @param[in] src_pix_fmt source pixel format
2410
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2411
 * @return Combination of flags informing you what kind of losses will occur.
2412
 */
2413
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2414
                             int has_alpha);
2415

    
2416
/**
2417
 * Finds the best pixel format to convert to given a certain source pixel
2418
 * format.  When converting from one pixel format to another, information loss
2419
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2420
 * information will be lost. Similarly, other losses occur when converting from
2421
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2422
 * the given pixel formats should be used to suffer the least amount of loss.
2423
 * The pixel formats from which it chooses one, are determined by the
2424
 * \p pix_fmt_mask parameter.
2425
 *
2426
 * @code
2427
 * src_pix_fmt = PIX_FMT_YUV420P;
2428
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2429
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2430
 * @endcode
2431
 *
2432
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2433
 * @param[in] src_pix_fmt source pixel format
2434
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2435
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2436
 * @return The best pixel format to convert to or -1 if none was found.
2437
 */
2438
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2439
                              int has_alpha, int *loss_ptr);
2440

    
2441

    
2442
/**
2443
 * Print in buf the string corresponding to the pixel format with
2444
 * number pix_fmt, or an header if pix_fmt is negative.
2445
 *
2446
 * @param[in] buf the buffer where to write the string
2447
 * @param[in] buf_size the size of buf
2448
 * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2449
 * a negative value to print the corresponding header.
2450
 * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2451
 */
2452
void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2453

    
2454
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2455
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2456

    
2457
/**
2458
 * Tell if an image really has transparent alpha values.
2459
 * @return ored mask of FF_ALPHA_xxx constants
2460
 */
2461
int img_get_alpha_info(const AVPicture *src,
2462
                       int pix_fmt, int width, int height);
2463

    
2464
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2465
/**
2466
 * convert among pixel formats
2467
 * @deprecated Use the software scaler (swscale) instead.
2468
 */
2469
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2470
                const AVPicture *src, int pix_fmt,
2471
                int width, int height);
2472
#endif
2473

    
2474
/* deinterlace a picture */
2475
/* deinterlace - if not supported return -1 */
2476
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2477
                          int pix_fmt, int width, int height);
2478

    
2479
/* external high level API */
2480

    
2481
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2482
extern AVCodec *first_avcodec;
2483
#endif
2484
AVCodec *av_codec_next(AVCodec *c);
2485

    
2486
/* returns LIBAVCODEC_VERSION_INT constant */
2487
unsigned avcodec_version(void);
2488
/* returns LIBAVCODEC_BUILD constant */
2489
unsigned avcodec_build(void);
2490

    
2491
/**
2492
 * Initializes libavcodec.
2493
 *
2494
 * @warning This function \e must be called before any other libavcodec
2495
 * function.
2496
 */
2497
void avcodec_init(void);
2498

    
2499
void register_avcodec(AVCodec *format);
2500

    
2501
/**
2502
 * Finds a registered encoder with a matching codec ID.
2503
 *
2504
 * @param id CodecID of the requested encoder
2505
 * @return An encoder if one was found, NULL otherwise.
2506
 */
2507
AVCodec *avcodec_find_encoder(enum CodecID id);
2508

    
2509
/**
2510
 * Finds a registered encoder with the specified name.
2511
 *
2512
 * @param name name of the requested encoder
2513
 * @return An encoder if one was found, NULL otherwise.
2514
 */
2515
AVCodec *avcodec_find_encoder_by_name(const char *name);
2516

    
2517
/**
2518
 * Finds a registered decoder with a matching codec ID.
2519
 *
2520
 * @param id CodecID of the requested decoder
2521
 * @return A decoder if one was found, NULL otherwise.
2522
 */
2523
AVCodec *avcodec_find_decoder(enum CodecID id);
2524

    
2525
/**
2526
 * Finds a registered decoder with the specified name.
2527
 *
2528
 * @param name name of the requested decoder
2529
 * @return A decoder if one was found, NULL otherwise.
2530
 */
2531
AVCodec *avcodec_find_decoder_by_name(const char *name);
2532
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2533

    
2534
/**
2535
 * Sets the fields of the given AVCodecContext to default values.
2536
 *
2537
 * @param s The AVCodecContext of which the fields should be set to default values.
2538
 */
2539
void avcodec_get_context_defaults(AVCodecContext *s);
2540

    
2541
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2542
 *  we WILL change its arguments and name a few times! */
2543
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2544

    
2545
/**
2546
 * Allocates an AVCodecContext and sets its fields to default values.  The
2547
 * resulting struct can be deallocated by simply calling av_free().
2548
 *
2549
 * @return An AVCodecContext filled with default values or NULL on failure.
2550
 * @see avcodec_get_context_defaults
2551
 */
2552
AVCodecContext *avcodec_alloc_context(void);
2553

    
2554
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2555
 *  we WILL change its arguments and name a few times! */
2556
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2557

    
2558
/**
2559
 * Sets the fields of the given AVFrame to default values.
2560
 *
2561
 * @param pic The AVFrame of which the fields should be set to default values.
2562
 */
2563
void avcodec_get_frame_defaults(AVFrame *pic);
2564

    
2565
/**
2566
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2567
 * struct can be deallocated by simply calling av_free().
2568
 *
2569
 * @return An AVFrame filled with default values or NULL on failure.
2570
 * @see avcodec_get_frame_defaults
2571
 */
2572
AVFrame *avcodec_alloc_frame(void);
2573

    
2574
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2575
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2576
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2577
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2578

    
2579
/**
2580
 * Checks if the given dimension of a picture is valid, meaning that all
2581
 * bytes of the picture can be addressed with a signed int.
2582
 *
2583
 * @param[in] w Width of the picture.
2584
 * @param[in] h Height of the picture.
2585
 * @return Zero if valid, a negative value if invalid.
2586
 */
2587
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2588
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2589

    
2590
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2591
void avcodec_thread_free(AVCodecContext *s);
2592
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2593
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2594
//FIXME func typedef
2595

    
2596
/**
2597
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2598
 * function the context has to be allocated.
2599
 *
2600
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2601
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2602
 * retrieving a codec.
2603
 *
2604
 * @warning This function is not thread safe!
2605
 *
2606
 * @code
2607
 * avcodec_register_all();
2608
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2609
 * if (!codec)
2610
 *     exit(1);
2611
 *
2612
 * context = avcodec_alloc_context();
2613
 *
2614
 * if (avcodec_open(context, codec) < 0)
2615
 *     exit(1);
2616
 * @endcode
2617
 *
2618
 * @param avctx The context which will be set up to use the given codec.
2619
 * @param codec The codec to use within the context.
2620
 * @return zero on success, a negative value on error
2621
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2622
 */
2623
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2624

    
2625
/**
2626
 * @deprecated Use avcodec_decode_audio2() instead.
2627
 */
2628
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2629
                         int *frame_size_ptr,
2630
                         const uint8_t *buf, int buf_size);
2631

    
2632
/**
2633
 * Decodes an audio frame from \p buf into \p samples.
2634
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2635
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2636
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2637
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2638
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2639
 * decompressed frame size in \e bytes.
2640
 *
2641
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2642
 * output buffer before calling avcodec_decode_audio2().
2643
 *
2644
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2645
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2646
 * bits at once and could read over the end.
2647
 *
2648
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2649
 * no overreading happens for damaged MPEG streams.
2650
 *
2651
 * @note You might have to align the input buffer \p buf and output buffer \p
2652
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2653
 * necessary at all, on others it won't work at all if not aligned and on others
2654
 * it will work but it will have an impact on performance. In practice, the
2655
 * bitstream should have 4 byte alignment at minimum and all sample data should
2656
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2657
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2658
 * start of the buffer to 16.
2659
 *
2660
 * @param avctx the codec context
2661
 * @param[out] samples the output buffer
2662
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2663
 * @param[in] buf the input buffer
2664
 * @param[in] buf_size the input buffer size in bytes
2665
 * @return On error a negative value is returned, otherwise the number of bytes
2666
 * used or zero if no frame could be decompressed.
2667
 */
2668
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2669
                         int *frame_size_ptr,
2670
                         const uint8_t *buf, int buf_size);
2671

    
2672
/**
2673
 * Decodes a video frame from \p buf into \p picture.
2674
 * The avcodec_decode_video() function decodes a video frame from the input
2675
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2676
 * video codec which was coupled with \p avctx using avcodec_open(). The
2677
 * resulting decoded frame is stored in \p picture.
2678
 *
2679
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2680
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2681
 * bits at once and could read over the end.
2682
 *
2683
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2684
 * no overreading happens for damaged MPEG streams.
2685
 *
2686
 * @note You might have to align the input buffer \p buf and output buffer \p
2687
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2688
 * necessary at all, on others it won't work at all if not aligned and on others
2689
 * it will work but it will have an impact on performance. In practice, the
2690
 * bitstream should have 4 byte alignment at minimum and all sample data should
2691
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2692
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2693
 * start of the buffer to 16.
2694
 *
2695
 * @param avctx the codec context
2696
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2697
 * @param[in] buf the input buffer
2698
 * @param[in] buf_size the size of the input buffer in bytes
2699
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2700
 * @return On error a negative value is returned, otherwise the number of bytes
2701
 * used or zero if no frame could be decompressed.
2702
 */
2703
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2704
                         int *got_picture_ptr,
2705
                         const uint8_t *buf, int buf_size);
2706

    
2707
/* Decode a subtitle message. Return -1 if error, otherwise return the
2708
 * number of bytes used. If no subtitle could be decompressed,
2709
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2710
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2711
                            int *got_sub_ptr,
2712
                            const uint8_t *buf, int buf_size);
2713
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2714
                        int *data_size_ptr,
2715
                        uint8_t *buf, int buf_size);
2716

    
2717
/**
2718
 * Encodes an audio frame from \p samples into \p buf.
2719
 * The avcodec_encode_audio() function encodes an audio frame from the input
2720
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2721
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2722
 * stored in output buffer \p buf.
2723
 *
2724
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2725
 *
2726
 * @param avctx the codec context
2727
 * @param[out] buf the output buffer
2728
 * @param[in] buf_size the output buffer size
2729
 * @param[in] samples the input buffer containing the samples
2730
 * The number of samples read from this buffer is frame_size*channels,
2731
 * both of which are defined in \p avctx.
2732
 * @return On error a negative value is returned, on success zero or the number
2733
 * of bytes used to encode the data read from the input buffer.
2734
 */
2735
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2736
                         const short *samples);
2737

    
2738
/**
2739
 * Encodes a video frame from \p pict into \p buf.
2740
 * The avcodec_encode_video() function encodes a video frame from the input
2741
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2742
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2743
 * frame are stored in the output buffer \p buf. The input picture should be
2744
 * stored using a specific format, namely \c avctx.pix_fmt.
2745
 *
2746
 * @param avctx the codec context
2747
 * @param[out] buf the output buffer for the bitstream of encoded frame
2748
 * @param[in] buf_size the size of the output buffer in bytes
2749
 * @param[in] pict the input picture to encode
2750
 * @return On error a negative value is returned, on success zero or the number
2751
 * of bytes used from the input buffer.
2752
 */
2753
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2754
                         const AVFrame *pict);
2755
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2756
                            const AVSubtitle *sub);
2757

    
2758
int avcodec_close(AVCodecContext *avctx);
2759

    
2760
void avcodec_register_all(void);
2761

    
2762
/**
2763
 * Flush buffers, should be called when seeking or when switching to a different stream.
2764
 */
2765
void avcodec_flush_buffers(AVCodecContext *avctx);
2766

    
2767
void avcodec_default_free_buffers(AVCodecContext *s);
2768

    
2769
/* misc useful functions */
2770

    
2771
/**
2772
 * Returns a single letter to describe the given picture type \p pict_type.
2773
 *
2774
 * @param[in] pict_type the picture type
2775
 * @return A single character representing the picture type.
2776
 */
2777
char av_get_pict_type_char(int pict_type);
2778

    
2779
/**
2780
 * Returns codec bits per sample.
2781
 *
2782
 * @param[in] codec_id the codec
2783
 * @return Number of bits per sample or zero if unknown for the given codec.
2784
 */
2785
int av_get_bits_per_sample(enum CodecID codec_id);
2786

    
2787
/**
2788
 * Returns sample format bits per sample.
2789
 *
2790
 * @param[in] sample_fmt the sample format
2791
 * @return Number of bits per sample or zero if unknown for the given sample format.
2792
 */
2793
int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2794

    
2795
/* frame parsing */
2796
typedef struct AVCodecParserContext {
2797
    void *priv_data;
2798
    struct AVCodecParser *parser;
2799
    int64_t frame_offset; /* offset of the current frame */
2800
    int64_t cur_offset; /* current offset
2801
                           (incremented by each av_parser_parse()) */
2802
    int64_t last_frame_offset; /* offset of the last frame */
2803
    /* video info */
2804
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2805
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2806
    int64_t pts;     /* pts of the current frame */
2807
    int64_t dts;     /* dts of the current frame */
2808

    
2809
    /* private data */
2810
    int64_t last_pts;
2811
    int64_t last_dts;
2812
    int fetch_timestamp;
2813

    
2814
#define AV_PARSER_PTS_NB 4
2815
    int cur_frame_start_index;
2816
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2817
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2818
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2819

    
2820
    int flags;
2821
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2822

    
2823
    int64_t offset;      ///< byte offset from starting packet start
2824
    int64_t last_offset;
2825
} AVCodecParserContext;
2826

    
2827
typedef struct AVCodecParser {
2828
    int codec_ids[5]; /* several codec IDs are permitted */
2829
    int priv_data_size;
2830
    int (*parser_init)(AVCodecParserContext *s);
2831
    int (*parser_parse)(AVCodecParserContext *s,
2832
                        AVCodecContext *avctx,
2833
                        const uint8_t **poutbuf, int *poutbuf_size,
2834
                        const uint8_t *buf, int buf_size);
2835
    void (*parser_close)(AVCodecParserContext *s);
2836
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2837
    struct AVCodecParser *next;
2838
} AVCodecParser;
2839

    
2840
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2841
extern AVCodecParser *av_first_parser;
2842
#endif
2843
AVCodecParser *av_parser_next(AVCodecParser *c);
2844

    
2845
void av_register_codec_parser(AVCodecParser *parser);
2846
AVCodecParserContext *av_parser_init(int codec_id);
2847
int av_parser_parse(AVCodecParserContext *s,
2848
                    AVCodecContext *avctx,
2849
                    uint8_t **poutbuf, int *poutbuf_size,
2850
                    const uint8_t *buf, int buf_size,
2851
                    int64_t pts, int64_t dts);
2852
int av_parser_change(AVCodecParserContext *s,
2853
                     AVCodecContext *avctx,
2854
                     uint8_t **poutbuf, int *poutbuf_size,
2855
                     const uint8_t *buf, int buf_size, int keyframe);
2856
void av_parser_close(AVCodecParserContext *s);
2857

    
2858

    
2859
typedef struct AVBitStreamFilterContext {
2860
    void *priv_data;
2861
    struct AVBitStreamFilter *filter;
2862
    AVCodecParserContext *parser;
2863
    struct AVBitStreamFilterContext *next;
2864
} AVBitStreamFilterContext;
2865

    
2866

    
2867
typedef struct AVBitStreamFilter {
2868
    const char *name;
2869
    int priv_data_size;
2870
    int (*filter)(AVBitStreamFilterContext *bsfc,
2871
                  AVCodecContext *avctx, const char *args,
2872
                  uint8_t **poutbuf, int *poutbuf_size,
2873
                  const uint8_t *buf, int buf_size, int keyframe);
2874
    void (*close)(AVBitStreamFilterContext *bsfc);
2875
    struct AVBitStreamFilter *next;
2876
} AVBitStreamFilter;
2877

    
2878
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2879
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2880
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2881
                               AVCodecContext *avctx, const char *args,
2882
                               uint8_t **poutbuf, int *poutbuf_size,
2883
                               const uint8_t *buf, int buf_size, int keyframe);
2884
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2885

    
2886
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2887

    
2888
/* memory */
2889

    
2890
/**
2891
 * Reallocates the given block if it is not large enough, otherwise it
2892
 * does nothing.
2893
 *
2894
 * @see av_realloc
2895
 */
2896
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2897

    
2898
/* for static data only */
2899

    
2900
/**
2901
 * Frees all static arrays and resets their pointers to 0.
2902
 * Call this function to release all statically allocated tables.
2903
 *
2904
 * @deprecated. Code which uses av_free_static is broken/misdesigned
2905
 * and should correctly use static arrays
2906
 *
2907
 */
2908
attribute_deprecated void av_free_static(void);
2909

    
2910
/**
2911
 * Allocation of static arrays.
2912
 *
2913
 * @warning Do not use for normal allocation.
2914
 *
2915
 * @param[in] size The amount of memory you need in bytes.
2916
 * @return block of memory of the requested size
2917
 * @deprecated. Code which uses av_mallocz_static is broken/misdesigned
2918
 * and should correctly use static arrays
2919
 */
2920
attribute_deprecated void *av_mallocz_static(unsigned int size);
2921

    
2922
/**
2923
 * Copy image 'src' to 'dst'.
2924
 */
2925
void av_picture_copy(AVPicture *dst, const AVPicture *src,
2926
              int pix_fmt, int width, int height);
2927

    
2928
/**
2929
 * Crop image top and left side.
2930
 */
2931
int av_picture_crop(AVPicture *dst, const AVPicture *src,
2932
             int pix_fmt, int top_band, int left_band);
2933

    
2934
/**
2935
 * Pad image.
2936
 */
2937
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2938
            int padtop, int padbottom, int padleft, int padright, int *color);
2939

    
2940
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2941
/**
2942
 * @deprecated Use the software scaler (swscale) instead.
2943
 */
2944
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
2945
              int pix_fmt, int width, int height);
2946

    
2947
/**
2948
 * @deprecated Use the software scaler (swscale) instead.
2949
 */
2950
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
2951
             int pix_fmt, int top_band, int left_band);
2952

    
2953
/**
2954
 * @deprecated Use the software scaler (swscale) instead.
2955
 */
2956
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2957
            int padtop, int padbottom, int padleft, int padright, int *color);
2958
#endif
2959

    
2960
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2961

    
2962
/**
2963
 * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
2964
 *
2965
 * @return 0 in case of a successful parsing, a negative value otherwise
2966
 * @param[in] str the string to parse: it has to be a string in the format
2967
 * <width>x<height> or a valid video frame size abbreviation.
2968
 * @param[in,out] width_ptr pointer to the variable which will contain the detected
2969
 * frame width value
2970
 * @param[in,out] height_ptr pointer to the variable which will contain the detected
2971
 * frame height value
2972
 */
2973
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
2974

    
2975
/**
2976
 * Parses \p str and put in \p frame_rate the detected values.
2977
 *
2978
 * @return 0 in case of a successful parsing, a negative value otherwise
2979
 * @param[in] str the string to parse: it has to be a string in the format
2980
 * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
2981
 * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
2982
 * frame rate
2983
 */
2984
int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
2985

    
2986
/* error handling */
2987
#if EINVAL > 0
2988
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
2989
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
2990
#else
2991
/* Some platforms have E* and errno already negated. */
2992
#define AVERROR(e) (e)
2993
#define AVUNERROR(e) (e)
2994
#endif
2995
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
2996
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
2997
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
2998
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
2999
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3000
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3001
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3002
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3003
#define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3004

    
3005
#endif /* FFMPEG_AVCODEC_H */