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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 St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#ifndef AVCODEC_H
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#define 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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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "avutil.h"
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#include <sys/types.h> /* size_t */
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#define AV_STRINGIFY(s)         AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBAVCODEC_VERSION_INT  ((51<<16)+(40<<8)+4)
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#define LIBAVCODEC_VERSION      51.40.4
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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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 *
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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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    /* 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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    /* 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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    /* 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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    /* 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_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_NB
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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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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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/* motion estimation type, EPZS by default */
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enum Motion_Est_ID {
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    ME_ZERO = 1,
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    ME_FULL,
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    ME_LOG,
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    ME_PHODS,
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    ME_EPZS,
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    ME_X1,
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    ME_HEX,
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    ME_UMH,
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    ME_ITER,
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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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/* 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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#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 location instead
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                                            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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/* Unsupported options :
409
 *              Syntax Arithmetic coding (SAC)
410
 *              Reference Picture Selection
411
 *              Independent Segment Decoding */
412
/* /Fx */
413
/* codec capabilities */
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415
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
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/**
417
 * Codec uses get_buffer() for allocating buffers.
418
 * direct rendering method 1
419
 */
420
#define CODEC_CAP_DR1             0x0002
421
/* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
422
#define CODEC_CAP_PARSE_ONLY      0x0004
423
#define CODEC_CAP_TRUNCATED       0x0008
424
/* Codec can export data for HW decoding (XvMC). */
425
#define CODEC_CAP_HWACCEL         0x0010
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/**
427
 * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
428
 * If this is not set, the codec is guaranteed to never be fed with NULL data.
429
 */
430
#define CODEC_CAP_DELAY           0x0020
431
/**
432
 * Codec can be fed a final frame with a smaller size.
433
 * This can be used to prevent truncation of the last audio samples.
434
 */
435
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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437
//The following defines may change, don't expect compatibility if you use them.
438
#define MB_TYPE_INTRA4x4   0x0001
439
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
440
#define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
441
#define MB_TYPE_16x16      0x0008
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#define MB_TYPE_16x8       0x0010
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#define MB_TYPE_8x16       0x0020
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#define MB_TYPE_8x8        0x0040
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#define MB_TYPE_INTERLACED 0x0080
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#define MB_TYPE_DIRECT2     0x0100 //FIXME
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#define MB_TYPE_ACPRED     0x0200
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#define MB_TYPE_GMC        0x0400
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#define MB_TYPE_SKIP       0x0800
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#define MB_TYPE_P0L0       0x1000
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#define MB_TYPE_P1L0       0x2000
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#define MB_TYPE_P0L1       0x4000
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#define MB_TYPE_P1L1       0x8000
454
#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
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#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
456
#define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
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#define MB_TYPE_QUANT      0x00010000
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#define MB_TYPE_CBP        0x00020000
459
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
460

    
461
/**
462
 * Pan Scan area.
463
 * This specifies the area which should be displayed.
464
 * Note there may be multiple such areas for one frame.
465
 */
466
typedef struct AVPanScan{
467
    /**
468
     * id
469
     * - encoding: Set by user.
470
     * - decoding: Set by libavcodec.
471
     */
472
    int id;
473

    
474
    /**
475
     * width and height in 1/16 pel
476
     * - encoding: Set by user.
477
     * - decoding: Set by libavcodec.
478
     */
479
    int width;
480
    int height;
481

    
482
    /**
483
     * position of the top left corner in 1/16 pel for up to 3 fields/frames
484
     * - encoding: Set by user.
485
     * - decoding: Set by libavcodec.
486
     */
487
    int16_t position[3][2];
488
}AVPanScan;
489

    
490
#define FF_COMMON_FRAME \
491
    /**\
492
     * pointer to the picture planes.\
493
     * This might be different from the first allocated byte\
494
     * - encoding: \
495
     * - decoding: \
496
     */\
497
    uint8_t *data[4];\
498
    int linesize[4];\
499
    /**\
500
     * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
501
     * This isn't used by libavcodec unless the default get/release_buffer() is used.\
502
     * - encoding: \
503
     * - decoding: \
504
     */\
505
    uint8_t *base[4];\
506
    /**\
507
     * 1 -> keyframe, 0-> not\
508
     * - encoding: Set by libavcodec.\
509
     * - decoding: Set by libavcodec.\
510
     */\
511
    int key_frame;\
512
\
513
    /**\
514
     * Picture type of the frame, see ?_TYPE below.\
515
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
516
     * - decoding: Set by libavcodec.\
517
     */\
518
    int pict_type;\
519
\
520
    /**\
521
     * presentation timestamp in time_base units (time when frame should be shown to user)\
522
     * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
523
     * - encoding: MUST be set by user.\
524
     * - decoding: Set by libavcodec.\
525
     */\
526
    int64_t pts;\
527
\
528
    /**\
529
     * picture number in bitstream order\
530
     * - encoding: set by\
531
     * - decoding: Set by libavcodec.\
532
     */\
533
    int coded_picture_number;\
534
    /**\
535
     * picture number in display order\
536
     * - encoding: set by\
537
     * - decoding: Set by libavcodec.\
538
     */\
539
    int display_picture_number;\
540
\
541
    /**\
542
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
543
     * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
544
     * - decoding: Set by libavcodec.\
545
     */\
546
    int quality; \
547
\
548
    /**\
549
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
550
     * Set to INT_MAX if the buffer has not been used yet.\
551
     * - encoding: unused\
552
     * - decoding: MUST be set by get_buffer().\
553
     */\
554
    int age;\
555
\
556
    /**\
557
     * is this picture used as reference\
558
     * - encoding: unused\
559
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
560
     */\
561
    int reference;\
562
\
563
    /**\
564
     * QP table\
565
     * - encoding: unused\
566
     * - decoding: Set by libavcodec.\
567
     */\
568
    int8_t *qscale_table;\
569
    /**\
570
     * QP store stride\
571
     * - encoding: unused\
572
     * - decoding: Set by libavcodec.\
573
     */\
574
    int qstride;\
575
\
576
    /**\
577
     * mbskip_table[mb]>=1 if MB didn't change\
578
     * stride= mb_width = (width+15)>>4\
579
     * - encoding: unused\
580
     * - decoding: Set by libavcodec.\
581
     */\
582
    uint8_t *mbskip_table;\
583
\
584
    /**\
585
     * motion vector table\
586
     * @code\
587
     * example:\
588
     * int mv_sample_log2= 4 - motion_subsample_log2;\
589
     * int mb_width= (width+15)>>4;\
590
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
591
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
592
     * @endcode\
593
     * - encoding: Set by user.\
594
     * - decoding: Set by libavcodec.\
595
     */\
596
    int16_t (*motion_val[2])[2];\
597
\
598
    /**\
599
     * macroblock type table\
600
     * mb_type_base + mb_width + 2\
601
     * - encoding: Set by user.\
602
     * - decoding: Set by libavcodec.\
603
     */\
604
    uint32_t *mb_type;\
605
\
606
    /**\
607
     * log2 of the size of the block which a single vector in motion_val represents: \
608
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
609
     * - encoding: unused\
610
     * - decoding: Set by libavcodec.\
611
     */\
612
    uint8_t motion_subsample_log2;\
613
\
614
    /**\
615
     * for some private data of the user\
616
     * - encoding: unused\
617
     * - decoding: Set by user.\
618
     */\
619
    void *opaque;\
620
\
621
    /**\
622
     * error\
623
     * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
624
     * - decoding: unused\
625
     */\
626
    uint64_t error[4];\
627
\
628
    /**\
629
     * type of the buffer (to keep track of who has to deallocate data[*])\
630
     * - encoding: Set by the one who allocates it.\
631
     * - decoding: Set by the one who allocates it.\
632
     * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
633
     */\
634
    int type;\
635
    \
636
    /**\
637
     * When decoding, this signals how much the picture must be delayed.\
638
     * extra_delay = repeat_pict / (2*fps)\
639
     * - encoding: unused\
640
     * - decoding: Set by libavcodec.\
641
     */\
642
    int repeat_pict;\
643
    \
644
    /**\
645
     * \
646
     */\
647
    int qscale_type;\
648
    \
649
    /**\
650
     * The content of the picture is interlaced.\
651
     * - encoding: Set by user.\
652
     * - decoding: Set by libavcodec. (default 0)\
653
     */\
654
    int interlaced_frame;\
655
    \
656
    /**\
657
     * If the content is interlaced, is top field displayed first.\
658
     * - encoding: Set by user.\
659
     * - decoding: Set by libavcodec.\
660
     */\
661
    int top_field_first;\
662
    \
663
    /**\
664
     * Pan scan.\
665
     * - encoding: Set by user.\
666
     * - decoding: Set by libavcodec.\
667
     */\
668
    AVPanScan *pan_scan;\
669
    \
670
    /**\
671
     * Tell user application that palette has changed from previous frame.\
672
     * - encoding: ??? (no palette-enabled encoder yet)\
673
     * - decoding: Set by libavcodec. (default 0).\
674
     */\
675
    int palette_has_changed;\
676
    \
677
    /**\
678
     * codec suggestion on buffer type if != 0\
679
     * - encoding: unused\
680
     * - decoding: Set by libavcodec. (before get_buffer() call)).\
681
     */\
682
    int buffer_hints;\
683
\
684
    /**\
685
     * DCT coefficients\
686
     * - encoding: unused\
687
     * - decoding: Set by libavcodec.\
688
     */\
689
    short *dct_coeff;\
690
\
691
    /**\
692
     * motion referece frame index\
693
     * - encoding: Set by user.\
694
     * - decoding: Set by libavcodec.\
695
     */\
696
    int8_t *ref_index[2];
697

    
698
#define FF_QSCALE_TYPE_MPEG1 0
699
#define FF_QSCALE_TYPE_MPEG2 1
700
#define FF_QSCALE_TYPE_H264  2
701

    
702
#define FF_BUFFER_TYPE_INTERNAL 1
703
#define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
704
#define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
705
#define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
706

    
707

    
708
#define FF_I_TYPE 1 // Intra
709
#define FF_P_TYPE 2 // Predicted
710
#define FF_B_TYPE 3 // Bi-dir predicted
711
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
712
#define FF_SI_TYPE 5
713
#define FF_SP_TYPE 6
714

    
715
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
716
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
717
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
718
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
719

    
720
/**
721
 * Audio Video Frame.
722
 */
723
typedef struct AVFrame {
724
    FF_COMMON_FRAME
725
} AVFrame;
726

    
727
#define DEFAULT_FRAME_RATE_BASE 1001000
728

    
729
/**
730
 * main external API structure
731
 */
732
typedef struct AVCodecContext {
733
    /**
734
     * information on struct for av_log
735
     * - set by avcodec_alloc_context
736
     */
737
    AVClass *av_class;
738
    /**
739
     * the average bitrate
740
     * - encoding: Set by user; unused for constant quantizer encoding.
741
     * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
742
     */
743
    int bit_rate;
744

    
745
    /**
746
     * number of bits the bitstream is allowed to diverge from the reference.
747
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
748
     * - encoding: Set by user; unused for constant quantizer encoding.
749
     * - decoding: unused
750
     */
751
    int bit_rate_tolerance;
752

    
753
    /**
754
     * CODEC_FLAG_*.
755
     * - encoding: Set by user.
756
     * - decoding: Set by user.
757
     */
758
    int flags;
759

    
760
    /**
761
     * Some codecs need additional format info. It is stored here.
762
     * If any muxer uses this then ALL demuxers/parsers AND encoders for the
763
     * specific codec MUST set it correctly otherwise stream copy breaks.
764
     * In general use of this field by muxers is not recommanded.
765
     * - encoding: Set by libavcodec.
766
     * - decoding: Set by libavcodec. (FIXME: Is this OK?)
767
     */
768
    int sub_id;
769

    
770
    /**
771
     * Motion estimation algorithm used for video coding.
772
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
773
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
774
     * - encoding: MUST be set by user.
775
     * - decoding: unused
776
     */
777
    int me_method;
778

    
779
    /**
780
     * some codecs need / can use extradata like Huffman tables.
781
     * mjpeg: Huffman tables
782
     * rv10: additional flags
783
     * mpeg4: global headers (they can be in the bitstream or here)
784
     * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
785
     * than extradata_size to avoid prolems if it is read with the bitstream reader.
786
     * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
787
     * - encoding: Set/allocated/freed by libavcodec.
788
     * - decoding: Set/allocated/freed by user.
789
     */
790
    uint8_t *extradata;
791
    int extradata_size;
792

    
793
    /**
794
     * This is the fundamental unit of time (in seconds) in terms
795
     * of which frame timestamps are represented. For fixed-fps content,
796
     * timebase should be 1/framerate and timestamp increments should be
797
     * identically 1.
798
     * - encoding: MUST be set by user.
799
     * - decoding: Set by libavcodec.
800
     */
801
    AVRational time_base;
802

    
803
    /* video only */
804
    /**
805
     * picture width / height.
806
     * - encoding: MUST be set by user.
807
     * - decoding: Set by libavcodec.
808
     * Note: For compatibility it is possible to set this instead of
809
     * coded_width/height before decoding.
810
     */
811
    int width, height;
812

    
813
#define FF_ASPECT_EXTENDED 15
814

    
815
    /**
816
     * the number of pictures in a group of pictures, or 0 for intra_only
817
     * - encoding: Set by user.
818
     * - decoding: unused
819
     */
820
    int gop_size;
821

    
822
    /**
823
     * Pixel format, see PIX_FMT_xxx.
824
     * - encoding: Set by user.
825
     * - decoding: Set by libavcodec.
826
     */
827
    enum PixelFormat pix_fmt;
828

    
829
    /**
830
     * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
831
     * has to read frames at native frame rate.
832
     * - encoding: Set by user.
833
     * - decoding: unused
834
     */
835
    int rate_emu;
836

    
837
    /**
838
     * If non NULL, 'draw_horiz_band' is called by the libavcodec
839
     * decoder to draw a horizontal band. It improves cache usage. Not
840
     * all codecs can do that. You must check the codec capabilities
841
     * beforehand.
842
     * - encoding: unused
843
     * - decoding: Set by user.
844
     * @param height the height of the slice
845
     * @param y the y position of the slice
846
     * @param type 1->top field, 2->bottom field, 3->frame
847
     * @param offset offset into the AVFrame.data from which the slice should be read
848
     */
849
    void (*draw_horiz_band)(struct AVCodecContext *s,
850
                            const AVFrame *src, int offset[4],
851
                            int y, int type, int height);
852

    
853
    /* audio only */
854
    int sample_rate; ///< samples per second
855
    int channels;
856

    
857
    /**
858
     * audio sample format
859
     * - encoding: Set by user.
860
     * - decoding: Set by libavcodec.
861
     */
862
    enum SampleFormat sample_fmt;  ///< sample format, currently unused
863

    
864
    /* The following data should not be initialized. */
865
    /**
866
     * Samples per packet, initialized when calling 'init'.
867
     */
868
    int frame_size;
869
    int frame_number;   ///< audio or video frame number
870
    int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
871

    
872
    /**
873
     * Number of frames the decoded output will be delayed relative to
874
     * the encoded input.
875
     * - encoding: Set by libavcodec.
876
     * - decoding: unused
877
     */
878
    int delay;
879

    
880
    /* - encoding parameters */
881
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
882
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
883

    
884
    /**
885
     * minimum quantizer
886
     * - encoding: Set by user.
887
     * - decoding: unused
888
     */
889
    int qmin;
890

    
891
    /**
892
     * maximum quantizer
893
     * - encoding: Set by user.
894
     * - decoding: unused
895
     */
896
    int qmax;
897

    
898
    /**
899
     * maximum quantizer difference between frames
900
     * - encoding: Set by user.
901
     * - decoding: unused
902
     */
903
    int max_qdiff;
904

    
905
    /**
906
     * maximum number of B-frames between non-B-frames
907
     * Note: The output will be delayed by max_b_frames+1 relative to the input.
908
     * - encoding: Set by user.
909
     * - decoding: unused
910
     */
911
    int max_b_frames;
912

    
913
    /**
914
     * qscale factor between IP and B-frames
915
     * - encoding: Set by user.
916
     * - decoding: unused
917
     */
918
    float b_quant_factor;
919

    
920
    /** obsolete FIXME remove */
921
    int rc_strategy;
922
#define FF_RC_STRATEGY_XVID 1
923

    
924
    int b_frame_strategy;
925

    
926
    /**
927
     * hurry up amount
928
     * - encoding: unused
929
     * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
930
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
931
     */
932
    int hurry_up;
933

    
934
    struct AVCodec *codec;
935

    
936
    void *priv_data;
937

    
938
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
939
    /* unused, FIXME remove*/
940
    int rtp_mode;
941
#endif
942

    
943
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
944
                            /* do its best to deliver a chunk with size     */
945
                            /* below rtp_payload_size, the chunk will start */
946
                            /* with a start code on some codecs like H.263. */
947
                            /* This doesn't take account of any particular  */
948
                            /* headers inside the transmitted RTP payload.  */
949

    
950

    
951
    /* The RTP callback: This function is called    */
952
    /* every time the encoder has a packet to send. */
953
    /* It depends on the encoder if the data starts */
954
    /* with a Start Code (it should). H.263 does.   */
955
    /* mb_nb contains the number of macroblocks     */
956
    /* encoded in the RTP payload.                  */
957
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
958

    
959
    /* statistics, used for 2-pass encoding */
960
    int mv_bits;
961
    int header_bits;
962
    int i_tex_bits;
963
    int p_tex_bits;
964
    int i_count;
965
    int p_count;
966
    int skip_count;
967
    int misc_bits;
968

    
969
    /**
970
     * number of bits used for the previously encoded frame
971
     * - encoding: Set by libavcodec.
972
     * - decoding: unused
973
     */
974
    int frame_bits;
975

    
976
    /**
977
     * Private data of the user, can be used to carry app specific stuff.
978
     * - encoding: Set by user.
979
     * - decoding: Set by user.
980
     */
981
    void *opaque;
982

    
983
    char codec_name[32];
984
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
985
    enum CodecID codec_id; /* see CODEC_ID_xxx */
986

    
987
    /**
988
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
989
     * This is used to work around some encoder bugs.
990
     * A demuxer should set this to what is stored in the field used to identify the codec.
991
     * If there are multiple such fields in a container then the demuxer should choose the one
992
     * which maximizes the information about the used codec.
993
     * If the codec tag field in a container is larger then 32 bits then the demuxer should
994
     * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
995
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
996
     * first.
997
     * - encoding: Set by user, if not then the default based on codec_id will be used.
998
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
999
     */
1000
    unsigned int codec_tag;
1001

    
1002
    /**
1003
     * Work around bugs in encoders which sometimes cannot be detected automatically.
1004
     * - encoding: Set by user
1005
     * - decoding: Set by user
1006
     */
1007
    int workaround_bugs;
1008
#define FF_BUG_AUTODETECT       1  ///< autodetection
1009
#define FF_BUG_OLD_MSMPEG4      2
1010
#define FF_BUG_XVID_ILACE       4
1011
#define FF_BUG_UMP4             8
1012
#define FF_BUG_NO_PADDING       16
1013
#define FF_BUG_AMV              32
1014
#define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1015
#define FF_BUG_QPEL_CHROMA      64
1016
#define FF_BUG_STD_QPEL         128
1017
#define FF_BUG_QPEL_CHROMA2     256
1018
#define FF_BUG_DIRECT_BLOCKSIZE 512
1019
#define FF_BUG_EDGE             1024
1020
#define FF_BUG_HPEL_CHROMA      2048
1021
#define FF_BUG_DC_CLIP          4096
1022
#define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1023
//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1024

    
1025
    /**
1026
     * luma single coefficient elimination threshold
1027
     * - encoding: Set by user.
1028
     * - decoding: unused
1029
     */
1030
    int luma_elim_threshold;
1031

    
1032
    /**
1033
     * chroma single coeff elimination threshold
1034
     * - encoding: Set by user.
1035
     * - decoding: unused
1036
     */
1037
    int chroma_elim_threshold;
1038

    
1039
    /**
1040
     * strictly follow the standard (MPEG4, ...).
1041
     * - encoding: Set by user.
1042
     * - decoding: unused
1043
     */
1044
    int strict_std_compliance;
1045
#define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1046
#define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1047
#define FF_COMPLIANCE_NORMAL        0
1048
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1049
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1050

    
1051
    /**
1052
     * qscale offset between IP and B-frames
1053
     * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1054
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1055
     * - encoding: Set by user.
1056
     * - decoding: unused
1057
     */
1058
    float b_quant_offset;
1059

    
1060
    /**
1061
     * Error resilience; higher values will detect more errors but may
1062
     * misdetect some more or less valid parts as errors.
1063
     * - encoding: unused
1064
     * - decoding: Set by user.
1065
     */
1066
    int error_resilience;
1067
#define FF_ER_CAREFUL         1
1068
#define FF_ER_COMPLIANT       2
1069
#define FF_ER_AGGRESSIVE      3
1070
#define FF_ER_VERY_AGGRESSIVE 4
1071

    
1072
    /**
1073
     * Called at the beginning of each frame to get a buffer for it.
1074
     * If pic.reference is set then the frame will be read later by libavcodec.
1075
     * avcodec_align_dimensions() should be used to find the required width and
1076
     * height, as they normally need to be rounded up to the next multiple of 16.
1077
     * - encoding: unused
1078
     * - decoding: Set by libavcodec., user can override.
1079
     */
1080
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1081

    
1082
    /**
1083
     * Called to release buffers which where allocated with get_buffer.
1084
     * A released buffer can be reused in get_buffer().
1085
     * pic.data[*] must be set to NULL.
1086
     * - encoding: unused
1087
     * - decoding: Set by libavcodec., user can override.
1088
     */
1089
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1090

    
1091
    /**
1092
     * If 1 the stream has a 1 frame delay during decoding.
1093
     * - encoding: Set by libavcodec.
1094
     * - decoding: Set by libavcodec.
1095
     */
1096
    int has_b_frames;
1097

    
1098
    /**
1099
     * number of bytes per packet if constant and known or 0
1100
     * Used by some WAV based audio codecs.
1101
     */
1102
    int block_align;
1103

    
1104
    int parse_only; /* - decoding only: If true, only parsing is done
1105
                       (function avcodec_parse_frame()). The frame
1106
                       data is returned. Only MPEG codecs support this now. */
1107

    
1108
    /**
1109
     * 0-> h263 quant 1-> mpeg quant
1110
     * - encoding: Set by user.
1111
     * - decoding: unused
1112
     */
1113
    int mpeg_quant;
1114

    
1115
    /**
1116
     * pass1 encoding statistics output buffer
1117
     * - encoding: Set by libavcodec.
1118
     * - decoding: unused
1119
     */
1120
    char *stats_out;
1121

    
1122
    /**
1123
     * pass2 encoding statistics input buffer
1124
     * Concatenated stuff from stats_out of pass1 should be placed here.
1125
     * - encoding: Allocated/set/freed by user.
1126
     * - decoding: unused
1127
     */
1128
    char *stats_in;
1129

    
1130
    /**
1131
     * ratecontrol qmin qmax limiting method
1132
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1133
     * - encoding: Set by user.
1134
     * - decoding: unused
1135
     */
1136
    float rc_qsquish;
1137

    
1138
    float rc_qmod_amp;
1139
    int rc_qmod_freq;
1140

    
1141
    /**
1142
     * ratecontrol override, see RcOverride
1143
     * - encoding: Allocated/set/freed by user.
1144
     * - decoding: unused
1145
     */
1146
    RcOverride *rc_override;
1147
    int rc_override_count;
1148

    
1149
    /**
1150
     * rate control equation
1151
     * - encoding: Set by user
1152
     * - decoding: unused
1153
     */
1154
    char *rc_eq;
1155

    
1156
    /**
1157
     * maximum bitrate
1158
     * - encoding: Set by user.
1159
     * - decoding: unused
1160
     */
1161
    int rc_max_rate;
1162

    
1163
    /**
1164
     * minimum bitrate
1165
     * - encoding: Set by user.
1166
     * - decoding: unused
1167
     */
1168
    int rc_min_rate;
1169

    
1170
    /**
1171
     * decoder bitstream buffer size
1172
     * - encoding: Set by user.
1173
     * - decoding: unused
1174
     */
1175
    int rc_buffer_size;
1176
    float rc_buffer_aggressivity;
1177

    
1178
    /**
1179
     * qscale factor between P and I-frames
1180
     * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1181
     * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1182
     * - encoding: Set by user.
1183
     * - decoding: unused
1184
     */
1185
    float i_quant_factor;
1186

    
1187
    /**
1188
     * qscale offset between P and I-frames
1189
     * - encoding: Set by user.
1190
     * - decoding: unused
1191
     */
1192
    float i_quant_offset;
1193

    
1194
    /**
1195
     * initial complexity for pass1 ratecontrol
1196
     * - encoding: Set by user.
1197
     * - decoding: unused
1198
     */
1199
    float rc_initial_cplx;
1200

    
1201
    /**
1202
     * DCT algorithm, see FF_DCT_* below
1203
     * - encoding: Set by user.
1204
     * - decoding: unused
1205
     */
1206
    int dct_algo;
1207
#define FF_DCT_AUTO    0
1208
#define FF_DCT_FASTINT 1
1209
#define FF_DCT_INT     2
1210
#define FF_DCT_MMX     3
1211
#define FF_DCT_MLIB    4
1212
#define FF_DCT_ALTIVEC 5
1213
#define FF_DCT_FAAN    6
1214

    
1215
    /**
1216
     * luminance masking (0-> disabled)
1217
     * - encoding: Set by user.
1218
     * - decoding: unused
1219
     */
1220
    float lumi_masking;
1221

    
1222
    /**
1223
     * temporary complexity masking (0-> disabled)
1224
     * - encoding: Set by user.
1225
     * - decoding: unused
1226
     */
1227
    float temporal_cplx_masking;
1228

    
1229
    /**
1230
     * spatial complexity masking (0-> disabled)
1231
     * - encoding: Set by user.
1232
     * - decoding: unused
1233
     */
1234
    float spatial_cplx_masking;
1235

    
1236
    /**
1237
     * p block masking (0-> disabled)
1238
     * - encoding: Set by user.
1239
     * - decoding: unused
1240
     */
1241
    float p_masking;
1242

    
1243
    /**
1244
     * darkness masking (0-> disabled)
1245
     * - encoding: Set by user.
1246
     * - decoding: unused
1247
     */
1248
    float dark_masking;
1249

    
1250

    
1251
    /* for binary compatibility */
1252
    int unused;
1253

    
1254
    /**
1255
     * IDCT algorithm, see FF_IDCT_* below.
1256
     * - encoding: Set by user.
1257
     * - decoding: Set by user.
1258
     */
1259
    int idct_algo;
1260
#define FF_IDCT_AUTO         0
1261
#define FF_IDCT_INT          1
1262
#define FF_IDCT_SIMPLE       2
1263
#define FF_IDCT_SIMPLEMMX    3
1264
#define FF_IDCT_LIBMPEG2MMX  4
1265
#define FF_IDCT_PS2          5
1266
#define FF_IDCT_MLIB         6
1267
#define FF_IDCT_ARM          7
1268
#define FF_IDCT_ALTIVEC      8
1269
#define FF_IDCT_SH4          9
1270
#define FF_IDCT_SIMPLEARM    10
1271
#define FF_IDCT_H264         11
1272
#define FF_IDCT_VP3          12
1273
#define FF_IDCT_IPP          13
1274
#define FF_IDCT_XVIDMMX      14
1275
#define FF_IDCT_CAVS         15
1276
#define FF_IDCT_SIMPLEARMV5TE 16
1277
#define FF_IDCT_SIMPLEARMV6  17
1278

    
1279
    /**
1280
     * slice count
1281
     * - encoding: Set by libavcodec.
1282
     * - decoding: Set by user (or 0).
1283
     */
1284
    int slice_count;
1285
    /**
1286
     * slice offsets in the frame in bytes
1287
     * - encoding: Set/allocated by libavcodec.
1288
     * - decoding: Set/allocated by user (or NULL).
1289
     */
1290
    int *slice_offset;
1291

    
1292
    /**
1293
     * error concealment flags
1294
     * - encoding: unused
1295
     * - decoding: Set by user.
1296
     */
1297
    int error_concealment;
1298
#define FF_EC_GUESS_MVS   1
1299
#define FF_EC_DEBLOCK     2
1300

    
1301
    /**
1302
     * dsp_mask could be add used to disable unwanted CPU features
1303
     * CPU features (i.e. MMX, SSE. ...)
1304
     *
1305
     * With the FORCE flag you may instead enable given CPU features.
1306
     * (Dangerous: Usable in case of misdetection, improper usage however will
1307
     * result into program crash.)
1308
     */
1309
    unsigned dsp_mask;
1310
#define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1311
    /* lower 16 bits - CPU features */
1312
#ifdef HAVE_MMX
1313
#define FF_MM_MMX      0x0001 /* standard MMX */
1314
#define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1315
#define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1316
#define FF_MM_SSE      0x0008 /* SSE functions */
1317
#define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1318
#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1319
#endif /* HAVE_MMX */
1320
#ifdef HAVE_IWMMXT
1321
#define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1322
#endif /* HAVE_IWMMXT */
1323

    
1324
    /**
1325
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1326
     * - encoding: Set by libavcodec.
1327
     * - decoding: Set by user.
1328
     */
1329
     int bits_per_sample;
1330

    
1331
    /**
1332
     * prediction method (needed for huffyuv)
1333
     * - encoding: Set by user.
1334
     * - decoding: unused
1335
     */
1336
     int prediction_method;
1337
#define FF_PRED_LEFT   0
1338
#define FF_PRED_PLANE  1
1339
#define FF_PRED_MEDIAN 2
1340

    
1341
    /**
1342
     * sample aspect ratio (0 if unknown)
1343
     * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1344
     * - encoding: Set by user.
1345
     * - decoding: Set by libavcodec.
1346
     */
1347
    AVRational sample_aspect_ratio;
1348

    
1349
    /**
1350
     * the picture in the bitstream
1351
     * - encoding: Set by libavcodec.
1352
     * - decoding: Set by libavcodec.
1353
     */
1354
    AVFrame *coded_frame;
1355

    
1356
    /**
1357
     * debug
1358
     * - encoding: Set by user.
1359
     * - decoding: Set by user.
1360
     */
1361
    int debug;
1362
#define FF_DEBUG_PICT_INFO 1
1363
#define FF_DEBUG_RC        2
1364
#define FF_DEBUG_BITSTREAM 4
1365
#define FF_DEBUG_MB_TYPE   8
1366
#define FF_DEBUG_QP        16
1367
#define FF_DEBUG_MV        32
1368
#define FF_DEBUG_DCT_COEFF 0x00000040
1369
#define FF_DEBUG_SKIP      0x00000080
1370
#define FF_DEBUG_STARTCODE 0x00000100
1371
#define FF_DEBUG_PTS       0x00000200
1372
#define FF_DEBUG_ER        0x00000400
1373
#define FF_DEBUG_MMCO      0x00000800
1374
#define FF_DEBUG_BUGS      0x00001000
1375
#define FF_DEBUG_VIS_QP    0x00002000
1376
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1377

    
1378
    /**
1379
     * debug
1380
     * - encoding: Set by user.
1381
     * - decoding: Set by user.
1382
     */
1383
    int debug_mv;
1384
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1385
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1386
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1387

    
1388
    /**
1389
     * error
1390
     * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1391
     * - decoding: unused
1392
     */
1393
    uint64_t error[4];
1394

    
1395
    /**
1396
     * minimum MB quantizer
1397
     * - encoding: unused
1398
     * - decoding: unused
1399
     */
1400
    int mb_qmin;
1401

    
1402
    /**
1403
     * maximum MB quantizer
1404
     * - encoding: unused
1405
     * - decoding: unused
1406
     */
1407
    int mb_qmax;
1408

    
1409
    /**
1410
     * motion estimation comparison function
1411
     * - encoding: Set by user.
1412
     * - decoding: unused
1413
     */
1414
    int me_cmp;
1415
    /**
1416
     * subpixel motion estimation comparison function
1417
     * - encoding: Set by user.
1418
     * - decoding: unused
1419
     */
1420
    int me_sub_cmp;
1421
    /**
1422
     * macroblock comparison function (not supported yet)
1423
     * - encoding: Set by user.
1424
     * - decoding: unused
1425
     */
1426
    int mb_cmp;
1427
    /**
1428
     * interlaced DCT comparison function
1429
     * - encoding: Set by user.
1430
     * - decoding: unused
1431
     */
1432
    int ildct_cmp;
1433
#define FF_CMP_SAD  0
1434
#define FF_CMP_SSE  1
1435
#define FF_CMP_SATD 2
1436
#define FF_CMP_DCT  3
1437
#define FF_CMP_PSNR 4
1438
#define FF_CMP_BIT  5
1439
#define FF_CMP_RD   6
1440
#define FF_CMP_ZERO 7
1441
#define FF_CMP_VSAD 8
1442
#define FF_CMP_VSSE 9
1443
#define FF_CMP_NSSE 10
1444
#define FF_CMP_W53  11
1445
#define FF_CMP_W97  12
1446
#define FF_CMP_DCTMAX 13
1447
#define FF_CMP_DCT264 14
1448
#define FF_CMP_CHROMA 256
1449

    
1450
    /**
1451
     * ME diamond size & shape
1452
     * - encoding: Set by user.
1453
     * - decoding: unused
1454
     */
1455
    int dia_size;
1456

    
1457
    /**
1458
     * amount of previous MV predictors (2a+1 x 2a+1 square)
1459
     * - encoding: Set by user.
1460
     * - decoding: unused
1461
     */
1462
    int last_predictor_count;
1463

    
1464
    /**
1465
     * prepass for motion estimation
1466
     * - encoding: Set by user.
1467
     * - decoding: unused
1468
     */
1469
    int pre_me;
1470

    
1471
    /**
1472
     * motion estimation prepass comparison function
1473
     * - encoding: Set by user.
1474
     * - decoding: unused
1475
     */
1476
    int me_pre_cmp;
1477

    
1478
    /**
1479
     * ME prepass diamond size & shape
1480
     * - encoding: Set by user.
1481
     * - decoding: unused
1482
     */
1483
    int pre_dia_size;
1484

    
1485
    /**
1486
     * subpel ME quality
1487
     * - encoding: Set by user.
1488
     * - decoding: unused
1489
     */
1490
    int me_subpel_quality;
1491

    
1492
    /**
1493
     * callback to negotiate the pixelFormat
1494
     * @param fmt is the list of formats which are supported by the codec,
1495
     * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1496
     * The first is always the native one.
1497
     * @return the chosen format
1498
     * - encoding: unused
1499
     * - decoding: Set by user, if not set the native format will be chosen.
1500
     */
1501
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1502

    
1503
    /**
1504
     * DTG active format information (additional aspect ratio
1505
     * information only used in DVB MPEG-2 transport streams)
1506
     * 0 if not set.
1507
     *
1508
     * - encoding: unused
1509
     * - decoding: Set by decoder.
1510
     */
1511
    int dtg_active_format;
1512
#define FF_DTG_AFD_SAME         8
1513
#define FF_DTG_AFD_4_3          9
1514
#define FF_DTG_AFD_16_9         10
1515
#define FF_DTG_AFD_14_9         11
1516
#define FF_DTG_AFD_4_3_SP_14_9  13
1517
#define FF_DTG_AFD_16_9_SP_14_9 14
1518
#define FF_DTG_AFD_SP_4_3       15
1519

    
1520
    /**
1521
     * maximum motion estimation search range in subpel units
1522
     * If 0 then no limit.
1523
     *
1524
     * - encoding: Set by user.
1525
     * - decoding: unused
1526
     */
1527
    int me_range;
1528

    
1529
    /**
1530
     * intra quantizer bias
1531
     * - encoding: Set by user.
1532
     * - decoding: unused
1533
     */
1534
    int intra_quant_bias;
1535
#define FF_DEFAULT_QUANT_BIAS 999999
1536

    
1537
    /**
1538
     * inter quantizer bias
1539
     * - encoding: Set by user.
1540
     * - decoding: unused
1541
     */
1542
    int inter_quant_bias;
1543

    
1544
    /**
1545
     * color table ID
1546
     * - encoding: unused
1547
     * - decoding: Which clrtable should be used for 8bit RGB images.
1548
     *             Tables have to be stored somewhere. FIXME
1549
     */
1550
    int color_table_id;
1551

    
1552
    /**
1553
     * internal_buffer count
1554
     * Don't touch, used by libavcodec default_get_buffer().
1555
     */
1556
    int internal_buffer_count;
1557

    
1558
    /**
1559
     * internal_buffers
1560
     * Don't touch, used by libavcodec default_get_buffer().
1561
     */
1562
    void *internal_buffer;
1563

    
1564
#define FF_LAMBDA_SHIFT 7
1565
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1566
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1567
#define FF_LAMBDA_MAX (256*128-1)
1568

    
1569
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1570
    /**
1571
     * Global quality for codecs which cannot change it per frame.
1572
     * This should be proportional to MPEG-1/2/4 qscale.
1573
     * - encoding: Set by user.
1574
     * - decoding: unused
1575
     */
1576
    int global_quality;
1577

    
1578
#define FF_CODER_TYPE_VLC       0
1579
#define FF_CODER_TYPE_AC        1
1580
#define FF_CODER_TYPE_RAW       2
1581
#define FF_CODER_TYPE_RLE       3
1582
#define FF_CODER_TYPE_DEFLATE   4
1583
    /**
1584
     * coder type
1585
     * - encoding: Set by user.
1586
     * - decoding: unused
1587
     */
1588
    int coder_type;
1589

    
1590
    /**
1591
     * context model
1592
     * - encoding: Set by user.
1593
     * - decoding: unused
1594
     */
1595
    int context_model;
1596
#if 0
1597
    /**
1598
     *
1599
     * - encoding: unused
1600
     * - decoding: Set by user.
1601
     */
1602
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1603
#endif
1604

    
1605
    /**
1606
     * slice flags
1607
     * - encoding: unused
1608
     * - decoding: Set by user.
1609
     */
1610
    int slice_flags;
1611
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1612
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1613
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1614

    
1615
    /**
1616
     * XVideo Motion Acceleration
1617
     * - encoding: forbidden
1618
     * - decoding: set by decoder
1619
     */
1620
    int xvmc_acceleration;
1621

    
1622
    /**
1623
     * macroblock decision mode
1624
     * - encoding: Set by user.
1625
     * - decoding: unused
1626
     */
1627
    int mb_decision;
1628
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1629
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1630
#define FF_MB_DECISION_RD     2        ///< rate distoration
1631

    
1632
    /**
1633
     * custom intra quantization matrix
1634
     * - encoding: Set by user, can be NULL.
1635
     * - decoding: Set by libavcodec.
1636
     */
1637
    uint16_t *intra_matrix;
1638

    
1639
    /**
1640
     * custom inter quantization matrix
1641
     * - encoding: Set by user, can be NULL.
1642
     * - decoding: Set by libavcodec.
1643
     */
1644
    uint16_t *inter_matrix;
1645

    
1646
    /**
1647
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1648
     * This is used to work around some encoder bugs.
1649
     * - encoding: unused
1650
     * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1651
     */
1652
    unsigned int stream_codec_tag;
1653

    
1654
    /**
1655
     * scene change detection threshold
1656
     * 0 is default, larger means fewer detected scene changes.
1657
     * - encoding: Set by user.
1658
     * - decoding: unused
1659
     */
1660
    int scenechange_threshold;
1661

    
1662
    /**
1663
     * minimum Lagrange multipler
1664
     * - encoding: Set by user.
1665
     * - decoding: unused
1666
     */
1667
    int lmin;
1668

    
1669
    /**
1670
     * maximum Lagrange multipler
1671
     * - encoding: Set by user.
1672
     * - decoding: unused
1673
     */
1674
    int lmax;
1675

    
1676
    /**
1677
     * palette control structure
1678
     * - encoding: ??? (no palette-enabled encoder yet)
1679
     * - decoding: Set by user.
1680
     */
1681
    struct AVPaletteControl *palctrl;
1682

    
1683
    /**
1684
     * noise reduction strength
1685
     * - encoding: Set by user.
1686
     * - decoding: unused
1687
     */
1688
    int noise_reduction;
1689

    
1690
    /**
1691
     * Called at the beginning of a frame to get cr buffer for it.
1692
     * Buffer type (size, hints) must be the same. libavcodec won't check it.
1693
     * libavcodec will pass previous buffer in pic, function should return
1694
     * same buffer or new buffer with old frame "painted" into it.
1695
     * If pic.data[0] == NULL must behave like get_buffer().
1696
     * - encoding: unused
1697
     * - decoding: Set by libavcodec., user can override
1698
     */
1699
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1700

    
1701
    /**
1702
     * Number of bits which should be loaded into the rc buffer before decoding starts.
1703
     * - encoding: Set by user.
1704
     * - decoding: unused
1705
     */
1706
    int rc_initial_buffer_occupancy;
1707

    
1708
    /**
1709
     *
1710
     * - encoding: Set by user.
1711
     * - decoding: unused
1712
     */
1713
    int inter_threshold;
1714

    
1715
    /**
1716
     * CODEC_FLAG2_*
1717
     * - encoding: Set by user.
1718
     * - decoding: Set by user.
1719
     */
1720
    int flags2;
1721

    
1722
    /**
1723
     * Simulates errors in the bitstream to test error concealment.
1724
     * - encoding: Set by user.
1725
     * - decoding: unused
1726
     */
1727
    int error_rate;
1728

    
1729
    /**
1730
     * MP3 antialias algorithm, see FF_AA_* below.
1731
     * - encoding: unused
1732
     * - decoding: Set by user.
1733
     */
1734
    int antialias_algo;
1735
#define FF_AA_AUTO    0
1736
#define FF_AA_FASTINT 1 //not implemented yet
1737
#define FF_AA_INT     2
1738
#define FF_AA_FLOAT   3
1739
    /**
1740
     * quantizer noise shaping
1741
     * - encoding: Set by user.
1742
     * - decoding: unused
1743
     */
1744
    int quantizer_noise_shaping;
1745

    
1746
    /**
1747
     * thread count
1748
     * is used to decide how many independent tasks should be passed to execute()
1749
     * - encoding: Set by user.
1750
     * - decoding: Set by user.
1751
     */
1752
    int thread_count;
1753

    
1754
    /**
1755
     * The codec may call this to execute several independent things.
1756
     * It will return only after finishing all tasks.
1757
     * The user may replace this with some multithreaded implementation,
1758
     * the default implementation will execute the parts serially.
1759
     * @param count the number of things to execute
1760
     * - encoding: Set by libavcodec, user can override.
1761
     * - decoding: Set by libavcodec, user can override.
1762
     */
1763
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1764

    
1765
    /**
1766
     * thread opaque
1767
     * Can be used by execute() to store some per AVCodecContext stuff.
1768
     * - encoding: set by execute()
1769
     * - decoding: set by execute()
1770
     */
1771
    void *thread_opaque;
1772

    
1773
    /**
1774
     * Motion estimation threshold below which no motion estimation is
1775
     * performed, but instead the user specified motion vectors are used.
1776
     *
1777
     * - encoding: Set by user.
1778
     * - decoding: unused
1779
     */
1780
     int me_threshold;
1781

    
1782
    /**
1783
     * Macroblock threshold below which the user specified macroblock types will be used.
1784
     * - encoding: Set by user.
1785
     * - decoding: unused
1786
     */
1787
     int mb_threshold;
1788

    
1789
    /**
1790
     * precision of the intra DC coefficient - 8
1791
     * - encoding: Set by user.
1792
     * - decoding: unused
1793
     */
1794
     int intra_dc_precision;
1795

    
1796
    /**
1797
     * noise vs. sse weight for the nsse comparsion function
1798
     * - encoding: Set by user.
1799
     * - decoding: unused
1800
     */
1801
     int nsse_weight;
1802

    
1803
    /**
1804
     * Number of macroblock rows at the top which are skipped.
1805
     * - encoding: unused
1806
     * - decoding: Set by user.
1807
     */
1808
     int skip_top;
1809

    
1810
    /**
1811
     * Number of macroblock rows at the bottom which are skipped.
1812
     * - encoding: unused
1813
     * - decoding: Set by user.
1814
     */
1815
     int skip_bottom;
1816

    
1817
    /**
1818
     * profile
1819
     * - encoding: Set by user.
1820
     * - decoding: Set by libavcodec.
1821
     */
1822
     int profile;
1823
#define FF_PROFILE_UNKNOWN -99
1824
#define FF_PROFILE_AAC_MAIN 0
1825
#define FF_PROFILE_AAC_LOW 1
1826
#define FF_PROFILE_AAC_SSR 2
1827
#define FF_PROFILE_AAC_LTP 3
1828

    
1829
    /**
1830
     * level
1831
     * - encoding: Set by user.
1832
     * - decoding: Set by libavcodec.
1833
     */
1834
     int level;
1835
#define FF_LEVEL_UNKNOWN -99
1836

    
1837
    /**
1838
     * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1839
     * - encoding: unused
1840
     * - decoding: Set by user.
1841
     */
1842
     int lowres;
1843

    
1844
    /**
1845
     * Bitstream width / height, may be different from width/height if lowres
1846
     * or other things are used.
1847
     * - encoding: unused
1848
     * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1849
     */
1850
    int coded_width, coded_height;
1851

    
1852
    /**
1853
     * frame skip threshold
1854
     * - encoding: Set by user.
1855
     * - decoding: unused
1856
     */
1857
    int frame_skip_threshold;
1858

    
1859
    /**
1860
     * frame skip factor
1861
     * - encoding: Set by user.
1862
     * - decoding: unused
1863
     */
1864
    int frame_skip_factor;
1865

    
1866
    /**
1867
     * frame skip exponent
1868
     * - encoding: Set by user.
1869
     * - decoding: unused
1870
     */
1871
    int frame_skip_exp;
1872

    
1873
    /**
1874
     * frame skip comparison function
1875
     * - encoding: Set by user.
1876
     * - decoding: unused
1877
     */
1878
    int frame_skip_cmp;
1879

    
1880
    /**
1881
     * Border processing masking, raises the quantizer for mbs on the borders
1882
     * of the picture.
1883
     * - encoding: Set by user.
1884
     * - decoding: unused
1885
     */
1886
    float border_masking;
1887

    
1888
    /**
1889
     * minimum MB lagrange multipler
1890
     * - encoding: Set by user.
1891
     * - decoding: unused
1892
     */
1893
    int mb_lmin;
1894

    
1895
    /**
1896
     * maximum MB lagrange multipler
1897
     * - encoding: Set by user.
1898
     * - decoding: unused
1899
     */
1900
    int mb_lmax;
1901

    
1902
    /**
1903
     *
1904
     * - encoding: Set by user.
1905
     * - decoding: unused
1906
     */
1907
    int me_penalty_compensation;
1908

    
1909
    /**
1910
     *
1911
     * - encoding: unused
1912
     * - decoding: Set by user.
1913
     */
1914
    enum AVDiscard skip_loop_filter;
1915

    
1916
    /**
1917
     *
1918
     * - encoding: unused
1919
     * - decoding: Set by user.
1920
     */
1921
    enum AVDiscard skip_idct;
1922

    
1923
    /**
1924
     *
1925
     * - encoding: unused
1926
     * - decoding: Set by user.
1927
     */
1928
    enum AVDiscard skip_frame;
1929

    
1930
    /**
1931
     *
1932
     * - encoding: Set by user.
1933
     * - decoding: unused
1934
     */
1935
    int bidir_refine;
1936

    
1937
    /**
1938
     *
1939
     * - encoding: Set by user.
1940
     * - decoding: unused
1941
     */
1942
    int brd_scale;
1943

    
1944
    /**
1945
     * constant rate factor - quality-based VBR - values ~correspond to qps
1946
     * - encoding: Set by user.
1947
     * - decoding: unused
1948
     */
1949
    float crf;
1950

    
1951
    /**
1952
     * constant quantization parameter rate control method
1953
     * - encoding: Set by user.
1954
     * - decoding: unused
1955
     */
1956
    int cqp;
1957

    
1958
    /**
1959
     * minimum GOP size
1960
     * - encoding: Set by user.
1961
     * - decoding: unused
1962
     */
1963
    int keyint_min;
1964

    
1965
    /**
1966
     * number of reference frames
1967
     * - encoding: Set by user.
1968
     * - decoding: unused
1969
     */
1970
    int refs;
1971

    
1972
    /**
1973
     * chroma qp offset from luma
1974
     * - encoding: Set by user.
1975
     * - decoding: unused
1976
     */
1977
    int chromaoffset;
1978

    
1979
    /**
1980
     * Influences how often B-frames are used.
1981
     * - encoding: Set by user.
1982
     * - decoding: unused
1983
     */
1984
    int bframebias;
1985

    
1986
    /**
1987
     * trellis RD quantization
1988
     * - encoding: Set by user.
1989
     * - decoding: unused
1990
     */
1991
    int trellis;
1992

    
1993
    /**
1994
     * Reduce fluctuations in qp (before curve compression).
1995
     * - encoding: Set by user.
1996
     * - decoding: unused
1997
     */
1998
    float complexityblur;
1999

    
2000
    /**
2001
     * in-loop deblocking filter alphac0 parameter
2002
     * alpha is in the range -6...6
2003
     * - encoding: Set by user.
2004
     * - decoding: unused
2005
     */
2006
    int deblockalpha;
2007

    
2008
    /**
2009
     * in-loop deblocking filter beta parameter
2010
     * beta is in the range -6...6
2011
     * - encoding: Set by user.
2012
     * - decoding: unused
2013
     */
2014
    int deblockbeta;
2015

    
2016
    /**
2017
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2018
     * - encoding: Set by user.
2019
     * - decoding: unused
2020
     */
2021
    int partitions;
2022
#define X264_PART_I4X4 0x001  /* Analyse i4x4 */
2023
#define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
2024
#define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
2025
#define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
2026
#define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
2027

    
2028
    /**
2029
     * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2030
     * - encoding: Set by user.
2031
     * - decoding: unused
2032
     */
2033
    int directpred;
2034

    
2035
    /**
2036
     * Audio cutoff bandwidth (0 means "automatic"), currently used only by FAAC.
2037
     * - encoding: Set by user.
2038
     * - decoding: unused
2039
     */
2040
    int cutoff;
2041

    
2042
    /**
2043
     * Multiplied by qscale for each frame and added to scene_change_score.
2044
     * - encoding: Set by user.
2045
     * - decoding: unused
2046
     */
2047
    int scenechange_factor;
2048

    
2049
    /**
2050
     *
2051
     * Note: Value depends upon the compare function used for fullpel ME.
2052
     * - encoding: Set by user.
2053
     * - decoding: unused
2054
     */
2055
    int mv0_threshold;
2056

    
2057
    /**
2058
     * Adjusts sensitivity of b_frame_strategy 1.
2059
     * - encoding: Set by user.
2060
     * - decoding: unused
2061
     */
2062
    int b_sensitivity;
2063

    
2064
    /**
2065
     * - encoding: Set by user.
2066
     * - decoding: unused
2067
     */
2068
    int compression_level;
2069
#define FF_COMPRESSION_DEFAULT -1
2070

    
2071
    /**
2072
     * Sets whether to use LPC mode - used by FLAC encoder.
2073
     * - encoding: Set by user.
2074
     * - decoding: unused
2075
     */
2076
    int use_lpc;
2077

    
2078
    /**
2079
     * LPC coefficient precision - used by FLAC encoder
2080
     * - encoding: Set by user.
2081
     * - decoding: unused
2082
     */
2083
    int lpc_coeff_precision;
2084

    
2085
    /**
2086
     * - encoding: Set by user.
2087
     * - decoding: unused
2088
     */
2089
    int min_prediction_order;
2090

    
2091
    /**
2092
     * - encoding: Set by user.
2093
     * - decoding: unused
2094
     */
2095
    int max_prediction_order;
2096

    
2097
    /**
2098
     * search method for selecting prediction order
2099
     * - encoding: Set by user.
2100
     * - decoding: unused
2101
     */
2102
    int prediction_order_method;
2103

    
2104
    /**
2105
     * - encoding: Set by user.
2106
     * - decoding: unused
2107
     */
2108
    int min_partition_order;
2109

    
2110
    /**
2111
     * - encoding: Set by user.
2112
     * - decoding: unused
2113
     */
2114
    int max_partition_order;
2115

    
2116
    /**
2117
     * GOP timecode frame start number, in non drop frame format
2118
     * - encoding: Set by user.
2119
     * - decoding: unused
2120
     */
2121
    int64_t timecode_frame_start;
2122
} AVCodecContext;
2123

    
2124
/**
2125
 * AVCodec.
2126
 */
2127
typedef struct AVCodec {
2128
    const char *name;
2129
    enum CodecType type;
2130
    enum CodecID id;
2131
    int priv_data_size;
2132
    int (*init)(AVCodecContext *);
2133
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2134
    int (*close)(AVCodecContext *);
2135
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2136
                  uint8_t *buf, int buf_size);
2137
    int capabilities;
2138
    struct AVCodec *next;
2139
    void (*flush)(AVCodecContext *);
2140
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2141
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2142
} AVCodec;
2143

    
2144
/**
2145
 * four components are given, that's all.
2146
 * the last component is alpha
2147
 */
2148
typedef struct AVPicture {
2149
    uint8_t *data[4];
2150
    int linesize[4];       ///< number of bytes per line
2151
} AVPicture;
2152

    
2153
/**
2154
 * AVPaletteControl
2155
 * This structure defines a method for communicating palette changes
2156
 * between and demuxer and a decoder.
2157
 *
2158
 * @deprecated Use AVPacket to send palette changes instead.
2159
 * This is totally broken.
2160
 */
2161
#define AVPALETTE_SIZE 1024
2162
#define AVPALETTE_COUNT 256
2163
typedef struct AVPaletteControl {
2164

    
2165
    /* Demuxer sets this to 1 to indicate the palette has changed;
2166
     * decoder resets to 0. */
2167
    int palette_changed;
2168

    
2169
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2170
     * the individual palette components should be on a 8-bit scale; if
2171
     * the palette data comes from an IBM VGA native format, the component
2172
     * data is probably 6 bits in size and needs to be scaled. */
2173
    unsigned int palette[AVPALETTE_COUNT];
2174

    
2175
} AVPaletteControl attribute_deprecated;
2176

    
2177
typedef struct AVSubtitleRect {
2178
    uint16_t x;
2179
    uint16_t y;
2180
    uint16_t w;
2181
    uint16_t h;
2182
    uint16_t nb_colors;
2183
    int linesize;
2184
    uint32_t *rgba_palette;
2185
    uint8_t *bitmap;
2186
} AVSubtitleRect;
2187

    
2188
typedef struct AVSubtitle {
2189
    uint16_t format; /* 0 = graphics */
2190
    uint32_t start_display_time; /* relative to packet pts, in ms */
2191
    uint32_t end_display_time; /* relative to packet pts, in ms */
2192
    uint32_t num_rects;
2193
    AVSubtitleRect *rects;
2194
} AVSubtitle;
2195

    
2196
extern AVCodec ac3_encoder;
2197
extern AVCodec asv1_encoder;
2198
extern AVCodec asv2_encoder;
2199
extern AVCodec bmp_encoder;
2200
extern AVCodec dvvideo_encoder;
2201
extern AVCodec ffv1_encoder;
2202
extern AVCodec ffvhuff_encoder;
2203
extern AVCodec flac_encoder;
2204
extern AVCodec flashsv_encoder;
2205
extern AVCodec flv_encoder;
2206
extern AVCodec gif_encoder;
2207
extern AVCodec h261_encoder;
2208
extern AVCodec h263_encoder;
2209
extern AVCodec h263p_encoder;
2210
extern AVCodec h264_encoder;
2211
extern AVCodec huffyuv_encoder;
2212
extern AVCodec jpegls_encoder;
2213
extern AVCodec ljpeg_encoder;
2214
extern AVCodec mdec_encoder;
2215
extern AVCodec mjpeg_encoder;
2216
extern AVCodec mp2_encoder;
2217
extern AVCodec mpeg1video_encoder;
2218
extern AVCodec mpeg2video_encoder;
2219
extern AVCodec mpeg4_encoder;
2220
extern AVCodec msmpeg4v1_encoder;
2221
extern AVCodec msmpeg4v2_encoder;
2222
extern AVCodec msmpeg4v3_encoder;
2223
extern AVCodec pam_encoder;
2224
extern AVCodec pbm_encoder;
2225
extern AVCodec pgm_encoder;
2226
extern AVCodec pgmyuv_encoder;
2227
extern AVCodec png_encoder;
2228
extern AVCodec ppm_encoder;
2229
extern AVCodec roq_dpcm_encoder;
2230
extern AVCodec rv10_encoder;
2231
extern AVCodec rv20_encoder;
2232
extern AVCodec sgi_encoder;
2233
extern AVCodec snow_encoder;
2234
extern AVCodec sonic_encoder;
2235
extern AVCodec sonic_ls_encoder;
2236
extern AVCodec svq1_encoder;
2237
extern AVCodec targa_encoder;
2238
extern AVCodec tiff_encoder;
2239
extern AVCodec vcr1_encoder;
2240
extern AVCodec vorbis_encoder;
2241
extern AVCodec wmav1_encoder;
2242
extern AVCodec wmav2_encoder;
2243
extern AVCodec wmv1_encoder;
2244
extern AVCodec wmv2_encoder;
2245
extern AVCodec zmbv_encoder;
2246

    
2247
extern AVCodec aasc_decoder;
2248
extern AVCodec alac_decoder;
2249
extern AVCodec asv1_decoder;
2250
extern AVCodec asv2_decoder;
2251
extern AVCodec atrac3_decoder;
2252
extern AVCodec avs_decoder;
2253
extern AVCodec bethsoftvid_decoder;
2254
extern AVCodec bmp_decoder;
2255
extern AVCodec c93_decoder;
2256
extern AVCodec cavs_decoder;
2257
extern AVCodec cinepak_decoder;
2258
extern AVCodec cljr_decoder;
2259
extern AVCodec cook_decoder;
2260
extern AVCodec cscd_decoder;
2261
extern AVCodec cyuv_decoder;
2262
extern AVCodec dca_decoder;
2263
extern AVCodec dnxhd_decoder;
2264
extern AVCodec dsicinaudio_decoder;
2265
extern AVCodec dsicinvideo_decoder;
2266
extern AVCodec dvvideo_decoder;
2267
extern AVCodec dxa_decoder;
2268
extern AVCodec eightbps_decoder;
2269
extern AVCodec ffv1_decoder;
2270
extern AVCodec ffvhuff_decoder;
2271
extern AVCodec flac_decoder;
2272
extern AVCodec flashsv_decoder;
2273
extern AVCodec flic_decoder;
2274
extern AVCodec flv_decoder;
2275
extern AVCodec fourxm_decoder;
2276
extern AVCodec fraps_decoder;
2277
extern AVCodec gif_decoder;
2278
extern AVCodec h261_decoder;
2279
extern AVCodec h263_decoder;
2280
extern AVCodec h263i_decoder;
2281
extern AVCodec h264_decoder;
2282
extern AVCodec huffyuv_decoder;
2283
extern AVCodec idcin_decoder;
2284
extern AVCodec imc_decoder;
2285
extern AVCodec indeo2_decoder;
2286
extern AVCodec indeo3_decoder;
2287
extern AVCodec interplay_dpcm_decoder;
2288
extern AVCodec interplay_video_decoder;
2289
extern AVCodec kmvc_decoder;
2290
extern AVCodec loco_decoder;
2291
extern AVCodec mace3_decoder;
2292
extern AVCodec mace6_decoder;
2293
extern AVCodec mdec_decoder;
2294
extern AVCodec mjpeg_decoder;
2295
extern AVCodec mjpegb_decoder;
2296
extern AVCodec mmvideo_decoder;
2297
extern AVCodec mp2_decoder;
2298
extern AVCodec mp3_decoder;
2299
extern AVCodec mp3adu_decoder;
2300
extern AVCodec mp3on4_decoder;
2301
extern AVCodec mpc7_decoder;
2302
extern AVCodec mpeg1video_decoder;
2303
extern AVCodec mpeg2video_decoder;
2304
extern AVCodec mpeg4_decoder;
2305
extern AVCodec mpeg_xvmc_decoder;
2306
extern AVCodec mpegvideo_decoder;
2307
extern AVCodec msmpeg4v1_decoder;
2308
extern AVCodec msmpeg4v2_decoder;
2309
extern AVCodec msmpeg4v3_decoder;
2310
extern AVCodec msrle_decoder;
2311
extern AVCodec msvideo1_decoder;
2312
extern AVCodec mszh_decoder;
2313
extern AVCodec nuv_decoder;
2314
extern AVCodec png_decoder;
2315
extern AVCodec ptx_decoder;
2316
extern AVCodec qdm2_decoder;
2317
extern AVCodec qdraw_decoder;
2318
extern AVCodec qpeg_decoder;
2319
extern AVCodec qtrle_decoder;
2320
extern AVCodec ra_144_decoder;
2321
extern AVCodec ra_288_decoder;
2322
extern AVCodec roq_decoder;
2323
extern AVCodec roq_dpcm_decoder;
2324
extern AVCodec rpza_decoder;
2325
extern AVCodec rv10_decoder;
2326
extern AVCodec rv20_decoder;
2327
extern AVCodec rv30_decoder;
2328
extern AVCodec rv40_decoder;
2329
extern AVCodec sgi_decoder;
2330
extern AVCodec shorten_decoder;
2331
extern AVCodec smackaud_decoder;
2332
extern AVCodec smacker_decoder;
2333
extern AVCodec smc_decoder;
2334
extern AVCodec snow_decoder;
2335
extern AVCodec sol_dpcm_decoder;
2336
extern AVCodec sonic_decoder;
2337
extern AVCodec sp5x_decoder;
2338
extern AVCodec svq1_decoder;
2339
extern AVCodec svq3_decoder;
2340
extern AVCodec targa_decoder;
2341
extern AVCodec theora_decoder;
2342
extern AVCodec thp_decoder;
2343
extern AVCodec tiertexseqvideo_decoder;
2344
extern AVCodec tiff_decoder;
2345
extern AVCodec truemotion1_decoder;
2346
extern AVCodec truemotion2_decoder;
2347
extern AVCodec truespeech_decoder;
2348
extern AVCodec tscc_decoder;
2349
extern AVCodec tta_decoder;
2350
extern AVCodec txd_decoder;
2351
extern AVCodec ulti_decoder;
2352
extern AVCodec vc1_decoder;
2353
extern AVCodec vcr1_decoder;
2354
extern AVCodec vmdaudio_decoder;
2355
extern AVCodec vmdvideo_decoder;
2356
extern AVCodec vmnc_decoder;
2357
extern AVCodec vorbis_decoder;
2358
extern AVCodec vp3_decoder;
2359
extern AVCodec vp5_decoder;
2360
extern AVCodec vp6_decoder;
2361
extern AVCodec vp6f_decoder;
2362
extern AVCodec vqa_decoder;
2363
extern AVCodec wavpack_decoder;
2364
extern AVCodec wmav1_decoder;
2365
extern AVCodec wmav2_decoder;
2366
extern AVCodec wmv1_decoder;
2367
extern AVCodec wmv2_decoder;
2368
extern AVCodec wmv3_decoder;
2369
extern AVCodec wnv1_decoder;
2370
extern AVCodec ws_snd1_decoder;
2371
extern AVCodec xan_dpcm_decoder;
2372
extern AVCodec xan_wc3_decoder;
2373
extern AVCodec xl_decoder;
2374
extern AVCodec zmbv_decoder;
2375

    
2376
/* PCM codecs */
2377
#define PCM_CODEC(id, name) \
2378
extern AVCodec name ## _decoder; \
2379
extern AVCodec name ## _encoder
2380

    
2381
PCM_CODEC(CODEC_ID_PCM_ALAW,    pcm_alaw);
2382
PCM_CODEC(CODEC_ID_PCM_MULAW,   pcm_mulaw);
2383
PCM_CODEC(CODEC_ID_PCM_S8,      pcm_s8);
2384
PCM_CODEC(CODEC_ID_PCM_S16BE,   pcm_s16be);
2385
PCM_CODEC(CODEC_ID_PCM_S16LE,   pcm_s16le);
2386
PCM_CODEC(CODEC_ID_PCM_S24BE,   pcm_s24be);
2387
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2388
PCM_CODEC(CODEC_ID_PCM_S24LE,   pcm_s24le);
2389
PCM_CODEC(CODEC_ID_PCM_S32BE,   pcm_s32be);
2390
PCM_CODEC(CODEC_ID_PCM_S32LE,   pcm_s32le);
2391
PCM_CODEC(CODEC_ID_PCM_U8,      pcm_u8);
2392
PCM_CODEC(CODEC_ID_PCM_U16BE,   pcm_u16be);
2393
PCM_CODEC(CODEC_ID_PCM_U16LE,   pcm_u16le);
2394
PCM_CODEC(CODEC_ID_PCM_U24BE,   pcm_u24be);
2395
PCM_CODEC(CODEC_ID_PCM_U24LE,   pcm_u24le);
2396
PCM_CODEC(CODEC_ID_PCM_U32BE,   pcm_u32be);
2397
PCM_CODEC(CODEC_ID_PCM_U32LE,   pcm_u32le);
2398

    
2399
/* ADPCM codecs */
2400

    
2401
PCM_CODEC(CODEC_ID_ADPCM_4XM,     adpcm_4xm);
2402
PCM_CODEC(CODEC_ID_ADPCM_ADX,     adpcm_adx);
2403
PCM_CODEC(CODEC_ID_ADPCM_CT,      adpcm_ct);
2404
PCM_CODEC(CODEC_ID_ADPCM_EA,      adpcm_ea);
2405
PCM_CODEC(CODEC_ID_ADPCM_G726,    adpcm_g726);
2406
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2407
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2408
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT,  adpcm_ima_qt);
2409
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2410
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS,  adpcm_ima_ws);
2411
PCM_CODEC(CODEC_ID_ADPCM_MS,      adpcm_ms);
2412
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2413
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2414
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2415
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG,  adpcm_ima_smjpeg);
2416
PCM_CODEC(CODEC_ID_ADPCM_SWF,     adpcm_swf);
2417
PCM_CODEC(CODEC_ID_ADPCM_THP,     adpcm_thp);
2418
PCM_CODEC(CODEC_ID_ADPCM_XA,      adpcm_xa);
2419
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA,  adpcm_yamaha);
2420

    
2421
#undef PCM_CODEC
2422

    
2423
/* dummy raw video codec */
2424
extern AVCodec rawvideo_decoder;
2425
extern AVCodec rawvideo_encoder;
2426

    
2427
/* the following codecs use external libs */
2428
extern AVCodec aac_decoder;
2429
extern AVCodec faac_encoder;
2430
extern AVCodec liba52_decoder;
2431
extern AVCodec libamr_nb_decoder;
2432
extern AVCodec libamr_nb_encoder;
2433
extern AVCodec libamr_wb_decoder;
2434
extern AVCodec libamr_wb_encoder;
2435
extern AVCodec libdts_decoder;
2436
extern AVCodec libgsm_decoder;
2437
extern AVCodec libgsm_encoder;
2438
extern AVCodec libgsm_ms_decoder;
2439
extern AVCodec libgsm_ms_encoder;
2440
extern AVCodec libtheora_encoder;
2441
extern AVCodec libvorbis_decoder;
2442
extern AVCodec libvorbis_encoder;
2443
extern AVCodec mp3lame_encoder;
2444
extern AVCodec mpeg4aac_decoder;
2445
extern AVCodec x264_encoder;
2446
extern AVCodec xvid_encoder;
2447
extern AVCodec zlib_decoder;
2448
extern AVCodec zlib_encoder;
2449

    
2450
/* subtitles */
2451
extern AVCodec dvbsub_decoder;
2452
extern AVCodec dvbsub_encoder;
2453
extern AVCodec dvdsub_decoder;
2454
extern AVCodec dvdsub_encoder;
2455

    
2456
/* resample.c */
2457

    
2458
struct ReSampleContext;
2459
struct AVResampleContext;
2460

    
2461
typedef struct ReSampleContext ReSampleContext;
2462

    
2463
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2464
                                     int output_rate, int input_rate);
2465
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2466
void audio_resample_close(ReSampleContext *s);
2467

    
2468
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2469
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2470
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2471
void av_resample_close(struct AVResampleContext *c);
2472

    
2473
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2474
/* YUV420 format is assumed ! */
2475

    
2476
/**
2477
 * @deprecated Use the software scaler (swscale) instead.
2478
 */
2479
struct ImgReSampleContext attribute_deprecated;
2480

    
2481
/**
2482
 * @deprecated Use the software scaler (swscale) instead.
2483
 */
2484
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2485

    
2486
/**
2487
 * @deprecated Use the software scaler (swscale) instead.
2488
 */
2489
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2490
                                      int input_width, int input_height);
2491

    
2492
/**
2493
 * @deprecated Use the software scaler (swscale) instead.
2494
 */
2495
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2496
                                      int iwidth, int iheight,
2497
                                      int topBand, int bottomBand,
2498
                                      int leftBand, int rightBand,
2499
                                      int padtop, int padbottom,
2500
                                      int padleft, int padright);
2501

    
2502
/**
2503
 * @deprecated Use the software scaler (swscale) instead.
2504
 */
2505
attribute_deprecated void img_resample(ImgReSampleContext *s,
2506
                  AVPicture *output, const AVPicture *input);
2507

    
2508
/**
2509
 * @deprecated Use the software scaler (swscale) instead.
2510
 */
2511
attribute_deprecated void img_resample_close(ImgReSampleContext *s);
2512

    
2513
#endif
2514

    
2515
/**
2516
 * Allocate memory for a picture.  Call avpicture_free to free it.
2517
 *
2518
 * @param picture the picture to be filled in
2519
 * @param pix_fmt the format of the picture
2520
 * @param width the width of the picture
2521
 * @param height the height of the picture
2522
 * @return zero if successful, a negative value if not
2523
 */
2524
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2525

    
2526
/**
2527
 * Free a picture previously allocated by avpicture_alloc().
2528
 *
2529
 * @param picture the AVPicture to be freed
2530
 */
2531
void avpicture_free(AVPicture *picture);
2532

    
2533
/**
2534
 * Fill in the AVPicture fields.
2535
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2536
 * which points to the image data buffer. Depending on the specified picture
2537
 * format, one or multiple image data pointers and line sizes will be set.
2538
 * If a planar format is specified, several pointers will be set pointing to
2539
 * the different picture planes and the line sizes of the different planes
2540
 * will be stored in the lines_sizes array.
2541
 *
2542
 * @param picture AVPicture whose fields are to be filled in
2543
 * @param ptr Buffer which will contain or contains the actual image data
2544
 * @param pix_fmt The format in which the picture data is stored.
2545
 * @param width the width of the image in pixels
2546
 * @param height the height of the image in pixels
2547
 * @return size of the image data in bytes
2548
 */
2549
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2550
                   int pix_fmt, int width, int height);
2551
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2552
                     unsigned char *dest, int dest_size);
2553

    
2554
/**
2555
 * Calculate the size in bytes that a picture of the given width and height
2556
 * would occupy if stored in the given picture format.
2557
 *
2558
 * @param pix_fmt the given picture format
2559
 * @param width the width of the image
2560
 * @param height the height of the image
2561
 * @return Image data size in bytes
2562
 */
2563
int avpicture_get_size(int pix_fmt, int width, int height);
2564
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2565
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2566
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2567
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2568
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2569

    
2570
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2571
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2572
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2573
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2574
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2575
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2576

    
2577
/**
2578
 * Computes what kind of losses will occur when converting from one specific
2579
 * pixel format to another.
2580
 * When converting from one pixel format to another, information loss may occur.
2581
 * For example, when converting from RGB24 to GRAY, the color information will
2582
 * be lost. Similarly, other losses occur when converting from some formats to
2583
 * other formats. These losses can involve loss of chroma, but also loss of
2584
 * resolution, loss of color depth, loss due to the color space conversion, loss
2585
 * of the alpha bits or loss due to color quantization.
2586
 * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2587
 * which will occur when converting from one pixel format to another.
2588
 *
2589
 * @param[in] dst_pix_fmt destination pixel format
2590
 * @param[in] src_pix_fmt source pixel format
2591
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2592
 * @return Combination of flags informing you what kind of losses will occur.
2593
 */
2594
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2595
                             int has_alpha);
2596

    
2597
/**
2598
 * Finds the best pixel format to convert to given a certain source pixel
2599
 * format.  When converting from one pixel format to another, information loss
2600
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2601
 * information will be lost. Similarly, other losses occur when converting from
2602
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2603
 * the given pixel formats should be used to suffer the least amount of loss.
2604
 * The pixel formats from which it chooses one, are determined by the
2605
 * \p pix_fmt_mask parameter.
2606
 *
2607
 * @code
2608
 * src_pix_fmt = PIX_FMT_YUV420P;
2609
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2610
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2611
 * @endcode
2612
 *
2613
 * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2614
 * @param[in] src_pix_fmt source pixel format
2615
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2616
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2617
 * @return The best pixel format to convert to or -1 if none was found.
2618
 */
2619
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2620
                              int has_alpha, int *loss_ptr);
2621

    
2622
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2623
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2624

    
2625
/**
2626
 * Tell if an image really has transparent alpha values.
2627
 * @return ored mask of FF_ALPHA_xxx constants
2628
 */
2629
int img_get_alpha_info(const AVPicture *src,
2630
                       int pix_fmt, int width, int height);
2631

    
2632
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2633
/**
2634
 * convert among pixel formats
2635
 * @deprecated Use the software scaler (swscale) instead.
2636
 */
2637
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2638
                const AVPicture *src, int pix_fmt,
2639
                int width, int height);
2640
#endif
2641

    
2642
/* deinterlace a picture */
2643
/* deinterlace - if not supported return -1 */
2644
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2645
                          int pix_fmt, int width, int height);
2646

    
2647
/* external high level API */
2648

    
2649
extern AVCodec *first_avcodec;
2650

    
2651
/* returns LIBAVCODEC_VERSION_INT constant */
2652
unsigned avcodec_version(void);
2653
/* returns LIBAVCODEC_BUILD constant */
2654
unsigned avcodec_build(void);
2655

    
2656
/**
2657
 * Initializes libavcodec.
2658
 *
2659
 * @warning This function \e must be called before any other libavcodec
2660
 * function.
2661
 */
2662
void avcodec_init(void);
2663

    
2664
void register_avcodec(AVCodec *format);
2665

    
2666
/**
2667
 * Finds an encoder with a matching codec ID.
2668
 *
2669
 * @param id CodecID of the requested encoder
2670
 * @return An encoder if one was found, NULL otherwise.
2671
 */
2672
AVCodec *avcodec_find_encoder(enum CodecID id);
2673

    
2674
/**
2675
 * Finds an encoder with the specified name.
2676
 *
2677
 * @param name name of the requested encoder
2678
 * @return An encoder if one was found, NULL otherwise.
2679
 */
2680
AVCodec *avcodec_find_encoder_by_name(const char *name);
2681

    
2682
/**
2683
 * Finds a decoder with a matching codec ID.
2684
 *
2685
 * @param id CodecID of the requested decoder
2686
 * @return A decoder if one was found, NULL otherwise.
2687
 */
2688
AVCodec *avcodec_find_decoder(enum CodecID id);
2689

    
2690
/**
2691
 * Finds an decoder with the specified name.
2692
 *
2693
 * @param name name of the requested decoder
2694
 * @return A decoder if one was found, NULL otherwise.
2695
 */
2696
AVCodec *avcodec_find_decoder_by_name(const char *name);
2697
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2698

    
2699
/**
2700
 * Sets the fields of the given AVCodecContext to default values.
2701
 *
2702
 * @param s The AVCodecContext of which the fields should be set to default values.
2703
 */
2704
void avcodec_get_context_defaults(AVCodecContext *s);
2705

    
2706
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2707
 *  we WILL change its arguments and name a few times! */
2708
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2709

    
2710
/**
2711
 * Allocates an AVCodecContext and sets its fields to default values.  The
2712
 * resulting struct can be deallocated by simply calling av_free().
2713
 *
2714
 * @return An AVCodecContext filled with default values or NULL on failure.
2715
 * @see avcodec_get_context_defaults
2716
 */
2717
AVCodecContext *avcodec_alloc_context(void);
2718

    
2719
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2720
 *  we WILL change its arguments and name a few times! */
2721
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2722

    
2723
/**
2724
 * Sets the fields of the given AVFrame to default values.
2725
 *
2726
 * @param pic The AVFrame of which the fields should be set to default values.
2727
 */
2728
void avcodec_get_frame_defaults(AVFrame *pic);
2729

    
2730
/**
2731
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2732
 * struct can be deallocated by simply calling av_free().
2733
 *
2734
 * @return An AVFrame filled with default values or NULL on failure.
2735
 * @see avcodec_get_frame_defaults
2736
 */
2737
AVFrame *avcodec_alloc_frame(void);
2738

    
2739
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2740
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2741
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2742
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2743

    
2744
/**
2745
 * Checks if the given dimension of a picture is valid, meaning that all
2746
 * bytes of the picture can be addressed with a signed int.
2747
 *
2748
 * @param[in] w Width of the picture.
2749
 * @param[in] h Height of the picture.
2750
 * @return Zero if valid, a negative value if invalid.
2751
 */
2752
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2753
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2754

    
2755
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2756
void avcodec_thread_free(AVCodecContext *s);
2757
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2758
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2759
//FIXME func typedef
2760

    
2761
/**
2762
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2763
 * function the context has to be allocated.
2764
 *
2765
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2766
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2767
 * retrieving a codec.
2768
 *
2769
 * @warning This function is not thread safe!
2770
 *
2771
 * @code
2772
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2773
 * if (!codec)
2774
 *     exit(1);
2775
 *
2776
 * context = avcodec_alloc_context();
2777
 *
2778
 * if (avcodec_open(context, codec) < 0)
2779
 *     exit(1);
2780
 * @endcode
2781
 *
2782
 * @param avctx The context which will be set up to use the given codec.
2783
 * @param codec The codec to use within the context.
2784
 * @return zero on success, a negative value on error
2785
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2786
 */
2787
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2788

    
2789
/**
2790
 * @deprecated Use avcodec_decode_audio2() instead.
2791
 */
2792
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2793
                         int *frame_size_ptr,
2794
                         uint8_t *buf, int buf_size);
2795

    
2796
/**
2797
 * Decodes an audio frame from \p buf into \p samples.
2798
 * The avcodec_decode_audio2() function decodes an audio frame from the input
2799
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2800
 * audio codec which was coupled with \p avctx using avcodec_open(). The
2801
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2802
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2803
 * decompressed frame size in \e bytes.
2804
 *
2805
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2806
 * output buffer before calling avcodec_decode_audio2().
2807
 *
2808
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2809
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2810
 * bits at once and could read over the end.
2811
 *
2812
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2813
 * no overreading happens for damaged MPEG streams.
2814
 *
2815
 * @note You might have to align the input buffer \p buf and output buffer \p
2816
 * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2817
 * necessary at all, on others it won't work at all if not aligned and on others
2818
 * it will work but it will have an impact on performance. In practice, the
2819
 * bitstream should have 4 byte alignment at minimum and all sample data should
2820
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2821
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2822
 * start of the buffer to 16.
2823
 *
2824
 * @param avctx the codec context
2825
 * @param[out] samples the output buffer
2826
 * @param[in,out] frame_size_ptr the output buffer size in bytes
2827
 * @param[in] buf the input buffer
2828
 * @param[in] buf_size the input buffer size in bytes
2829
 * @return On error a negative value is returned, otherwise the number of bytes
2830
 * used or zero if no frame could be decompressed.
2831
 */
2832
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2833
                         int *frame_size_ptr,
2834
                         uint8_t *buf, int buf_size);
2835

    
2836
/**
2837
 * Decodes a video frame from \p buf into \p picture.
2838
 * The avcodec_decode_video() function decodes a video frame from the input
2839
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2840
 * video codec which was coupled with \p avctx using avcodec_open(). The
2841
 * resulting decoded frame is stored in \p picture.
2842
 *
2843
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2844
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2845
 * bits at once and could read over the end.
2846
 *
2847
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2848
 * no overreading happens for damaged MPEG streams.
2849
 *
2850
 * @note You might have to align the input buffer \p buf and output buffer \p
2851
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2852
 * necessary at all, on others it won't work at all if not aligned and on others
2853
 * it will work but it will have an impact on performance. In practice, the
2854
 * bitstream should have 4 byte alignment at minimum and all sample data should
2855
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2856
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2857
 * start of the buffer to 16.
2858
 *
2859
 * @param avctx the codec context
2860
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2861
 * @param[in] buf the input buffer
2862
 * @param[in] buf_size the size of the input buffer in bytes
2863
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2864
 * @return On error a negative value is returned, otherwise the number of bytes
2865
 * used or zero if no frame could be decompressed.
2866
 */
2867
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2868
                         int *got_picture_ptr,
2869
                         uint8_t *buf, int buf_size);
2870

    
2871
/* Decode a subtitle message. Return -1 if error, otherwise return the
2872
 * number of bytes used. If no subtitle could be decompressed,
2873
 * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2874
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2875
                            int *got_sub_ptr,
2876
                            const uint8_t *buf, int buf_size);
2877
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2878
                        int *data_size_ptr,
2879
                        uint8_t *buf, int buf_size);
2880

    
2881
/**
2882
 * Encodes an audio frame from \p samples into \p buf.
2883
 * The avcodec_encode_audio() function encodes an audio frame from the input
2884
 * buffer \p samples. To encode it, it makes use of the audio codec which was
2885
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2886
 * stored in output buffer \p buf.
2887
 *
2888
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2889
 *
2890
 * @param avctx the codec context
2891
 * @param[out] buf the output buffer
2892
 * @param[in] buf_size the output buffer size
2893
 * @param[in] samples the input buffer containing the samples
2894
 * @return On error a negative value is returned, on succes zero or the number
2895
 * of bytes used from the input buffer.
2896
 */
2897
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2898
                         const short *samples);
2899

    
2900
/**
2901
 * Encodes a video frame from \p pict into \p buf.
2902
 * The avcodec_encode_video() function encodes a video frame from the input
2903
 * \p pict. To encode it, it makes use of the video codec which was coupled with
2904
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2905
 * frame are stored in the output buffer \p buf. The input picture should be
2906
 * stored using a specific format, namely \c avctx.pix_fmt.
2907
 *
2908
 * @param avctx the codec context
2909
 * @param[out] buf the output buffer for the bitstream of encoded frame
2910
 * @param[in] buf_size the size of the output buffer in bytes
2911
 * @param[in] pict the input picture to encode
2912
 * @return On error a negative value is returned, on success zero or the number
2913
 * of bytes used from the input buffer.
2914
 */
2915
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2916
                         const AVFrame *pict);
2917
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2918
                            const AVSubtitle *sub);
2919

    
2920
int avcodec_close(AVCodecContext *avctx);
2921

    
2922
void avcodec_register_all(void);
2923

    
2924
/**
2925
 * Flush buffers, should be called when seeking or when switching to a different stream.
2926
 */
2927
void avcodec_flush_buffers(AVCodecContext *avctx);
2928

    
2929
void avcodec_default_free_buffers(AVCodecContext *s);
2930

    
2931
/* misc useful functions */
2932

    
2933
/**
2934
 * Returns a single letter to describe the given picture type \p pict_type.
2935
 *
2936
 * @param[in] pict_type the picture type
2937
 * @return A single character representing the picture type.
2938
 */
2939
char av_get_pict_type_char(int pict_type);
2940

    
2941
/**
2942
 * Returns codec bits per sample.
2943
 *
2944
 * @param[in] codec_id the codec
2945
 * @return Number of bits per sample or zero if unknown for the given codec.
2946
 */
2947
int av_get_bits_per_sample(enum CodecID codec_id);
2948

    
2949
/* frame parsing */
2950
typedef struct AVCodecParserContext {
2951
    void *priv_data;
2952
    struct AVCodecParser *parser;
2953
    int64_t frame_offset; /* offset of the current frame */
2954
    int64_t cur_offset; /* current offset
2955
                           (incremented by each av_parser_parse()) */
2956
    int64_t last_frame_offset; /* offset of the last frame */
2957
    /* video info */
2958
    int pict_type; /* XXX: Put it back in AVCodecContext. */
2959
    int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2960
    int64_t pts;     /* pts of the current frame */
2961
    int64_t dts;     /* dts of the current frame */
2962

    
2963
    /* private data */
2964
    int64_t last_pts;
2965
    int64_t last_dts;
2966
    int fetch_timestamp;
2967

    
2968
#define AV_PARSER_PTS_NB 4
2969
    int cur_frame_start_index;
2970
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2971
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2972
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2973

    
2974
    int flags;
2975
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2976

    
2977
    int64_t offset;      ///< byte offset from starting packet start
2978
    int64_t last_offset;
2979
} AVCodecParserContext;
2980

    
2981
typedef struct AVCodecParser {
2982
    int codec_ids[5]; /* several codec IDs are permitted */
2983
    int priv_data_size;
2984
    int (*parser_init)(AVCodecParserContext *s);
2985
    int (*parser_parse)(AVCodecParserContext *s,
2986
                        AVCodecContext *avctx,
2987
                        const uint8_t **poutbuf, int *poutbuf_size,
2988
                        const uint8_t *buf, int buf_size);
2989
    void (*parser_close)(AVCodecParserContext *s);
2990
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2991
    struct AVCodecParser *next;
2992
} AVCodecParser;
2993

    
2994
extern AVCodecParser *av_first_parser;
2995

    
2996
void av_register_codec_parser(AVCodecParser *parser);
2997
AVCodecParserContext *av_parser_init(int codec_id);
2998
int av_parser_parse(AVCodecParserContext *s,
2999
                    AVCodecContext *avctx,
3000
                    uint8_t **poutbuf, int *poutbuf_size,
3001
                    const uint8_t *buf, int buf_size,
3002
                    int64_t pts, int64_t dts);
3003
int av_parser_change(AVCodecParserContext *s,
3004
                     AVCodecContext *avctx,
3005
                     uint8_t **poutbuf, int *poutbuf_size,
3006
                     const uint8_t *buf, int buf_size, int keyframe);
3007
void av_parser_close(AVCodecParserContext *s);
3008

    
3009
extern AVCodecParser aac_parser;
3010
extern AVCodecParser ac3_parser;
3011
extern AVCodecParser cavsvideo_parser;
3012
extern AVCodecParser dca_parser;
3013
extern AVCodecParser dvbsub_parser;
3014
extern AVCodecParser dvdsub_parser;
3015
extern AVCodecParser h261_parser;
3016
extern AVCodecParser h263_parser;
3017
extern AVCodecParser h264_parser;
3018
extern AVCodecParser mjpeg_parser;
3019
extern AVCodecParser mpeg4video_parser;
3020
extern AVCodecParser mpegaudio_parser;
3021
extern AVCodecParser mpegvideo_parser;
3022
extern AVCodecParser pnm_parser;
3023
extern AVCodecParser vc1_parser;
3024

    
3025

    
3026
typedef struct AVBitStreamFilterContext {
3027
    void *priv_data;
3028
    struct AVBitStreamFilter *filter;
3029
    AVCodecParserContext *parser;
3030
    struct AVBitStreamFilterContext *next;
3031
} AVBitStreamFilterContext;
3032

    
3033

    
3034
typedef struct AVBitStreamFilter {
3035
    const char *name;
3036
    int priv_data_size;
3037
    int (*filter)(AVBitStreamFilterContext *bsfc,
3038
                  AVCodecContext *avctx, const char *args,
3039
                  uint8_t **poutbuf, int *poutbuf_size,
3040
                  const uint8_t *buf, int buf_size, int keyframe);
3041
    struct AVBitStreamFilter *next;
3042
} AVBitStreamFilter;
3043

    
3044
extern AVBitStreamFilter *av_first_bitstream_filter;
3045

    
3046
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
3047
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
3048
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
3049
                               AVCodecContext *avctx, const char *args,
3050
                               uint8_t **poutbuf, int *poutbuf_size,
3051
                               const uint8_t *buf, int buf_size, int keyframe);
3052
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
3053

    
3054
extern AVBitStreamFilter dump_extradata_bsf;
3055
extern AVBitStreamFilter remove_extradata_bsf;
3056
extern AVBitStreamFilter noise_bsf;
3057
extern AVBitStreamFilter mp3_header_compress_bsf;
3058
extern AVBitStreamFilter mp3_header_decompress_bsf;
3059
extern AVBitStreamFilter mjpega_dump_header_bsf;
3060
extern AVBitStreamFilter imx_dump_header_bsf;
3061

    
3062

    
3063
/* memory */
3064

    
3065
/**
3066
 * Reallocates the given block if it is not large enough, otherwise it
3067
 * does nothing.
3068
 *
3069
 * @see av_realloc
3070
 */
3071
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3072

    
3073
/* for static data only */
3074

    
3075
/**
3076
 * Frees all static arrays and resets their pointers to 0.
3077
 * Call this function to release all statically allocated tables.
3078
 *
3079
 * @deprecated. Code which uses av_free_static is broken/missdesigned
3080
 * and should correctly use static arrays
3081
 *
3082
 */
3083
attribute_deprecated void av_free_static(void);
3084

    
3085
/**
3086
 * Allocation of static arrays.
3087
 *
3088
 * @warning Do not use for normal allocation.
3089
 *
3090
 * @param[in] size The amount of memory you need in bytes.
3091
 * @return block of memory of the requested size
3092
 * @deprecated. Code which uses av_mallocz_static is broken/missdesigned
3093
 * and should correctly use static arrays
3094
 */
3095
attribute_deprecated void *av_mallocz_static(unsigned int size);
3096

    
3097
/**
3098
 * Copy image 'src' to 'dst'.
3099
 */
3100
void av_picture_copy(AVPicture *dst, const AVPicture *src,
3101
              int pix_fmt, int width, int height);
3102

    
3103
/**
3104
 * Crop image top and left side.
3105
 */
3106
int av_picture_crop(AVPicture *dst, const AVPicture *src,
3107
             int pix_fmt, int top_band, int left_band);
3108

    
3109
/**
3110
 * Pad image.
3111
 */
3112
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3113
            int padtop, int padbottom, int padleft, int padright, int *color);
3114

    
3115
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
3116
/**
3117
 * @deprecated Use the software scaler (swscale) instead.
3118
 */
3119
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
3120
              int pix_fmt, int width, int height);
3121

    
3122
/**
3123
 * @deprecated Use the software scaler (swscale) instead.
3124
 */
3125
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
3126
             int pix_fmt, int top_band, int left_band);
3127

    
3128
/**
3129
 * @deprecated Use the software scaler (swscale) instead.
3130
 */
3131
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3132
            int padtop, int padbottom, int padleft, int padright, int *color);
3133
#endif
3134

    
3135
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3136

    
3137
/* error handling */
3138
#if EINVAL > 0
3139
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3140
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3141
#else
3142
/* Some platforms have E* and errno already negated. */
3143
#define AVERROR(e) (e)
3144
#define AVUNERROR(e) (e)
3145
#endif
3146
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3147
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3148
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3149
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3150
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3151
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3152
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3153

    
3154
#ifdef __cplusplus
3155
}
3156
#endif
3157

    
3158
#endif /* AVCODEC_H */