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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)+2)
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#define LIBAVCODEC_VERSION      51.40.2
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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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enum CodecID {
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    CODEC_ID_NONE,
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    CODEC_ID_MPEG1VIDEO,
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    CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 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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    /* 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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    /* 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, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
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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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    /* 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 MPEG2 transport
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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 absolete */
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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 ever supported */
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/* all in native endian */
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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 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 initing
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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 H263
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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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/* parent program guarantees that the input for b-frame containing streams is not written to
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   for at least s->max_b_frames+1 frames, if this is not set than 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 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
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#endif
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#define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 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 ///< H263 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 skiping
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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 non linear quantizer
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/* Unsupported options :
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 *              Syntax Arithmetic coding (SAC)
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 *              Reference Picture Selection
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 *              Independent Segment Decoding */
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/* /Fx */
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/* codec capabilities */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
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/**
401
 * Codec uses get_buffer() for allocating buffers.
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 * direct rendering method 1
403
 */
404
#define CODEC_CAP_DR1             0x0002
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/* if 'parse_only' field is true, then avcodec_parse_frame() can be
406
   used */
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#define CODEC_CAP_PARSE_ONLY      0x0004
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#define CODEC_CAP_TRUNCATED       0x0008
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/* codec can export data for HW decoding (XvMC) */
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#define CODEC_CAP_HWACCEL         0x0010
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/**
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 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
413
 * if this is not set, the codec is guaranteed to never be feeded with NULL data
414
 */
415
#define CODEC_CAP_DELAY           0x0020
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/**
417
 * Codec can be fed a final frame with a smaller size.
418
 * This can be used to prevent truncation of the last audio samples.
419
 */
420
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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//the following defines may change, don't expect compatibility if you use them
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#define MB_TYPE_INTRA4x4   0x0001
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#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
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#define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
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#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
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#define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
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#define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
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#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
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//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
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/**
447
 * Pan Scan area.
448
 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
449
 */
450
typedef struct AVPanScan{
451
    /**
452
     * id.
453
     * - encoding: set by user.
454
     * - decoding: set by lavc
455
     */
456
    int id;
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458
    /**
459
     * width and height in 1/16 pel
460
     * - encoding: set by user.
461
     * - decoding: set by lavc
462
     */
463
    int width;
464
    int height;
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466
    /**
467
     * position of the top left corner in 1/16 pel for up to 3 fields/frames.
468
     * - encoding: set by user.
469
     * - decoding: set by lavc
470
     */
471
    int16_t position[3][2];
472
}AVPanScan;
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474
#define FF_COMMON_FRAME \
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    /**\
476
     * pointer to the picture planes.\
477
     * this might be different from the first allocated byte\
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     * - encoding: \
479
     * - decoding: \
480
     */\
481
    uint8_t *data[4];\
482
    int linesize[4];\
483
    /**\
484
     * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
485
     * this isn't used by lavc unless the default get/release_buffer() is used\
486
     * - encoding: \
487
     * - decoding: \
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     */\
489
    uint8_t *base[4];\
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    /**\
491
     * 1 -> keyframe, 0-> not\
492
     * - encoding: set by lavc\
493
     * - decoding: set by lavc\
494
     */\
495
    int key_frame;\
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\
497
    /**\
498
     * picture type of the frame, see ?_TYPE below.\
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     * - encoding: set by lavc for coded_picture (and set by user for input)\
500
     * - decoding: set by lavc\
501
     */\
502
    int pict_type;\
503
\
504
    /**\
505
     * presentation timestamp in time_base units (time when frame should be shown to user)\
506
     * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
507
     * - encoding: MUST be set by user\
508
     * - decoding: set by lavc\
509
     */\
510
    int64_t pts;\
511
\
512
    /**\
513
     * picture number in bitstream order.\
514
     * - encoding: set by\
515
     * - decoding: set by lavc\
516
     */\
517
    int coded_picture_number;\
518
    /**\
519
     * picture number in display order.\
520
     * - encoding: set by\
521
     * - decoding: set by lavc\
522
     */\
523
    int display_picture_number;\
524
\
525
    /**\
526
     * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
527
     * - encoding: set by lavc for coded_picture (and set by user for input)\
528
     * - decoding: set by lavc\
529
     */\
530
    int quality; \
531
\
532
    /**\
533
     * buffer age (1->was last buffer and dint change, 2->..., ...).\
534
     * set to INT_MAX if the buffer has not been used yet \
535
     * - encoding: unused\
536
     * - decoding: MUST be set by get_buffer()\
537
     */\
538
    int age;\
539
\
540
    /**\
541
     * is this picture used as reference\
542
     * - encoding: unused\
543
     * - decoding: set by lavc (before get_buffer() call))\
544
     */\
545
    int reference;\
546
\
547
    /**\
548
     * QP table\
549
     * - encoding: unused\
550
     * - decoding: set by lavc\
551
     */\
552
    int8_t *qscale_table;\
553
    /**\
554
     * QP store stride\
555
     * - encoding: unused\
556
     * - decoding: set by lavc\
557
     */\
558
    int qstride;\
559
\
560
    /**\
561
     * mbskip_table[mb]>=1 if MB didnt change\
562
     * stride= mb_width = (width+15)>>4\
563
     * - encoding: unused\
564
     * - decoding: set by lavc\
565
     */\
566
    uint8_t *mbskip_table;\
567
\
568
    /**\
569
     * Motion vector table.\
570
     * @code\
571
     * example:\
572
     * int mv_sample_log2= 4 - motion_subsample_log2;\
573
     * int mb_width= (width+15)>>4;\
574
     * int mv_stride= (mb_width << mv_sample_log2) + 1;\
575
     * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
576
     * @endcode\
577
     * - encoding: set by user\
578
     * - decoding: set by lavc\
579
     */\
580
    int16_t (*motion_val[2])[2];\
581
\
582
    /**\
583
     * Macroblock type table\
584
     * mb_type_base + mb_width + 2\
585
     * - encoding: set by user\
586
     * - decoding: set by lavc\
587
     */\
588
    uint32_t *mb_type;\
589
\
590
    /**\
591
     * log2 of the size of the block which a single vector in motion_val represents: \
592
     * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
593
     * - encoding: unused\
594
     * - decoding: set by lavc\
595
     */\
596
    uint8_t motion_subsample_log2;\
597
\
598
    /**\
599
     * for some private data of the user\
600
     * - encoding: unused\
601
     * - decoding: set by user\
602
     */\
603
    void *opaque;\
604
\
605
    /**\
606
     * error\
607
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
608
     * - decoding: unused\
609
     */\
610
    uint64_t error[4];\
611
\
612
    /**\
613
     * type of the buffer (to keep track of who has to dealloc data[*])\
614
     * - encoding: set by the one who allocs it\
615
     * - decoding: set by the one who allocs it\
616
     * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
617
     */\
618
    int type;\
619
    \
620
    /**\
621
     * when decoding, this signal how much the picture must be delayed.\
622
     * extra_delay = repeat_pict / (2*fps)\
623
     * - encoding: unused\
624
     * - decoding: set by lavc\
625
     */\
626
    int repeat_pict;\
627
    \
628
    /**\
629
     * \
630
     */\
631
    int qscale_type;\
632
    \
633
    /**\
634
     * The content of the picture is interlaced.\
635
     * - encoding: set by user\
636
     * - decoding: set by lavc (default 0)\
637
     */\
638
    int interlaced_frame;\
639
    \
640
    /**\
641
     * if the content is interlaced, is top field displayed first.\
642
     * - encoding: set by user\
643
     * - decoding: set by lavc\
644
     */\
645
    int top_field_first;\
646
    \
647
    /**\
648
     * Pan scan.\
649
     * - encoding: set by user\
650
     * - decoding: set by lavc\
651
     */\
652
    AVPanScan *pan_scan;\
653
    \
654
    /**\
655
     * tell user application that palette has changed from previous frame.\
656
     * - encoding: ??? (no palette-enabled encoder yet)\
657
     * - decoding: set by lavc (default 0)\
658
     */\
659
    int palette_has_changed;\
660
    \
661
    /**\
662
     * Codec suggestion on buffer type if != 0\
663
     * - encoding: unused\
664
     * - decoding: set by lavc (before get_buffer() call))\
665
     */\
666
    int buffer_hints;\
667
\
668
    /**\
669
     * DCT coeffitients\
670
     * - encoding: unused\
671
     * - decoding: set by lavc\
672
     */\
673
    short *dct_coeff;\
674
\
675
    /**\
676
     * Motion referece frame index\
677
     * - encoding: set by user\
678
     * - decoding: set by lavc\
679
     */\
680
    int8_t *ref_index[2];
681

    
682
#define FF_QSCALE_TYPE_MPEG1 0
683
#define FF_QSCALE_TYPE_MPEG2 1
684
#define FF_QSCALE_TYPE_H264  2
685

    
686
#define FF_BUFFER_TYPE_INTERNAL 1
687
#define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
688
#define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
689
#define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
690

    
691

    
692
#define FF_I_TYPE 1 // Intra
693
#define FF_P_TYPE 2 // Predicted
694
#define FF_B_TYPE 3 // Bi-dir predicted
695
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
696
#define FF_SI_TYPE 5
697
#define FF_SP_TYPE 6
698

    
699
#define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
700
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
701
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
702
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
703

    
704
/**
705
 * Audio Video Frame.
706
 */
707
typedef struct AVFrame {
708
    FF_COMMON_FRAME
709
} AVFrame;
710

    
711
#define DEFAULT_FRAME_RATE_BASE 1001000
712

    
713
/**
714
 * main external api structure.
715
 */
716
typedef struct AVCodecContext {
717
    /**
718
     * Info on struct for av_log
719
     * - set by avcodec_alloc_context
720
     */
721
    AVClass *av_class;
722
    /**
723
     * the average bitrate.
724
     * - encoding: set by user. unused for constant quantizer encoding
725
     * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
726
     */
727
    int bit_rate;
728

    
729
    /**
730
     * number of bits the bitstream is allowed to diverge from the reference.
731
     *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
732
     * - encoding: set by user. unused for constant quantizer encoding
733
     * - decoding: unused
734
     */
735
    int bit_rate_tolerance;
736

    
737
    /**
738
     * CODEC_FLAG_*.
739
     * - encoding: set by user.
740
     * - decoding: set by user.
741
     */
742
    int flags;
743

    
744
    /**
745
     * some codecs needs additionnal format info. It is stored here
746
     * if any muxer uses this then ALL demuxers/parsers AND encoders for the specific codec MUST set it correctly
747
     * too otherwise stream copy breaks
748
     * in general use of this field by muxers is not recommanded
749
     * - encoding: set by lavc.
750
     * - decoding: set by lavc. (FIXME is this ok?)
751
     */
752
    int sub_id;
753

    
754
    /**
755
     * motion estimation algorithm used for video coding.
756
     * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
757
     * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
758
     * - encoding: MUST be set by user.
759
     * - decoding: unused
760
     */
761
    int me_method;
762

    
763
    /**
764
     * some codecs need / can use extra-data like huffman tables.
765
     * mjpeg: huffman tables
766
     * rv10: additional flags
767
     * mpeg4: global headers (they can be in the bitstream or here)
768
     * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
769
     * then extradata_size to avoid prolems if its read with the bitstream reader
770
     * the bytewise contents of extradata must not depend on the architecture or cpu endianness
771
     * - encoding: set/allocated/freed by lavc.
772
     * - decoding: set/allocated/freed by user.
773
     */
774
    uint8_t *extradata;
775
    int extradata_size;
776

    
777
    /**
778
     * this is the fundamental unit of time (in seconds) in terms
779
     * of which frame timestamps are represented. for fixed-fps content,
780
     * timebase should be 1/framerate and timestamp increments should be
781
     * identically 1.
782
     * - encoding: MUST be set by user
783
     * - decoding: set by lavc.
784
     */
785
    AVRational time_base;
786

    
787
    /* video only */
788
    /**
789
     * picture width / height.
790
     * - encoding: MUST be set by user.
791
     * - decoding: set by lavc.
792
     * Note, for compatibility its possible to set this instead of
793
     * coded_width/height before decoding
794
     */
795
    int width, height;
796

    
797
#define FF_ASPECT_EXTENDED 15
798

    
799
    /**
800
     * the number of pictures in a group of pitures, or 0 for intra_only.
801
     * - encoding: set by user.
802
     * - decoding: unused
803
     */
804
    int gop_size;
805

    
806
    /**
807
     * pixel format, see PIX_FMT_xxx.
808
     * - encoding: set by user.
809
     * - decoding: set by lavc.
810
     */
811
    enum PixelFormat pix_fmt;
812

    
813
    /**
814
     * Frame rate emulation. If not zero lower layer (i.e. format handler)
815
     * has to read frames at native frame rate.
816
     * - encoding: set by user.
817
     * - decoding: unused.
818
     */
819
    int rate_emu;
820

    
821
    /**
822
     * if non NULL, 'draw_horiz_band' is called by the libavcodec
823
     * decoder to draw an horizontal band. It improve cache usage. Not
824
     * all codecs can do that. You must check the codec capabilities
825
     * before
826
     * - encoding: unused
827
     * - decoding: set by user.
828
     * @param height the height of the slice
829
     * @param y the y position of the slice
830
     * @param type 1->top field, 2->bottom field, 3->frame
831
     * @param offset offset into the AVFrame.data from which the slice should be read
832
     */
833
    void (*draw_horiz_band)(struct AVCodecContext *s,
834
                            const AVFrame *src, int offset[4],
835
                            int y, int type, int height);
836

    
837
    /* audio only */
838
    int sample_rate; ///< samples per sec
839
    int channels;
840

    
841
    /**
842
     * audio sample format.
843
     * - encoding: set by user.
844
     * - decoding: set by lavc.
845
     */
846
    enum SampleFormat sample_fmt;  ///< sample format, currenly unused
847

    
848
    /* the following data should not be initialized */
849
    /**
850
     * samples per packet. initialized when calling 'init'
851
     */
852
    int frame_size;
853
    int frame_number;   ///< audio or video frame number
854
    int real_pict_num;  ///< returns the real picture number of previous encoded frame
855

    
856
    /**
857
     * number of frames the decoded output will be delayed relative to
858
     * the encoded input.
859
     * - encoding: set by lavc.
860
     * - decoding: unused
861
     */
862
    int delay;
863

    
864
    /* - encoding parameters */
865
    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
866
    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
867

    
868
    /**
869
     * minimum quantizer.
870
     * - encoding: set by user.
871
     * - decoding: unused
872
     */
873
    int qmin;
874

    
875
    /**
876
     * maximum quantizer.
877
     * - encoding: set by user.
878
     * - decoding: unused
879
     */
880
    int qmax;
881

    
882
    /**
883
     * maximum quantizer difference between frames.
884
     * - encoding: set by user.
885
     * - decoding: unused
886
     */
887
    int max_qdiff;
888

    
889
    /**
890
     * maximum number of b frames between non b frames.
891
     * note: the output will be delayed by max_b_frames+1 relative to the input
892
     * - encoding: set by user.
893
     * - decoding: unused
894
     */
895
    int max_b_frames;
896

    
897
    /**
898
     * qscale factor between ip and b frames.
899
     * - encoding: set by user.
900
     * - decoding: unused
901
     */
902
    float b_quant_factor;
903

    
904
    /** obsolete FIXME remove */
905
    int rc_strategy;
906
#define FF_RC_STRATEGY_XVID 1
907

    
908
    int b_frame_strategy;
909

    
910
    /**
911
     * hurry up amount.
912
     * - encoding: unused
913
     * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
914
     * @deprecated Deprecated in favor of skip_idct and skip_frame.
915
     */
916
    int hurry_up;
917

    
918
    struct AVCodec *codec;
919

    
920
    void *priv_data;
921

    
922
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
923
    /* unused, FIXME remove*/
924
    int rtp_mode;
925
#endif
926

    
927
    int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
928
                            /* do it's best to deliver a chunk with size    */
929
                            /* below rtp_payload_size, the chunk will start */
930
                            /* with a start code on some codecs like H.263  */
931
                            /* This doesn't take account of any particular  */
932
                            /* headers inside the transmited RTP payload    */
933

    
934

    
935
    /* The RTP callback: This function is called   */
936
    /* every time the encoder has a packet to send */
937
    /* Depends on the encoder if the data starts   */
938
    /* with a Start Code (it should) H.263 does.   */
939
    /* mb_nb contains the number of macroblocks    */
940
    /* encoded in the RTP payload                  */
941
    void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
942

    
943
    /* statistics, used for 2-pass encoding */
944
    int mv_bits;
945
    int header_bits;
946
    int i_tex_bits;
947
    int p_tex_bits;
948
    int i_count;
949
    int p_count;
950
    int skip_count;
951
    int misc_bits;
952

    
953
    /**
954
     * number of bits used for the previously encoded frame.
955
     * - encoding: set by lavc
956
     * - decoding: unused
957
     */
958
    int frame_bits;
959

    
960
    /**
961
     * private data of the user, can be used to carry app specific stuff.
962
     * - encoding: set by user
963
     * - decoding: set by user
964
     */
965
    void *opaque;
966

    
967
    char codec_name[32];
968
    enum CodecType codec_type; /* see CODEC_TYPE_xxx */
969
    enum CodecID codec_id; /* see CODEC_ID_xxx */
970

    
971
    /**
972
     * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
973
     * this is used to workaround some encoder bugs
974
     * a demuxer should set this to what is stored in the field used to identify the codec
975
     * if there are mutiple such fields in a container then the demuxer should choose the one
976
     * which maximizes the information about the used codec
977
     * if the codec tag field in a container is larger then 32bit then the demxuer should
978
     * remap the longer id to 32bit with a table or other structure alternatively a new
979
     * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
980
     * first
981
     * - encoding: set by user, if not then the default based on codec_id will be used
982
     * - decoding: set by user, will be converted to upper case by lavc during init
983
     */
984
    unsigned int codec_tag;
985

    
986
    /**
987
     * workaround bugs in encoders which sometimes cannot be detected automatically.
988
     * - encoding: set by user
989
     * - decoding: set by user
990
     */
991
    int workaround_bugs;
992
#define FF_BUG_AUTODETECT       1  ///< autodetection
993
#define FF_BUG_OLD_MSMPEG4      2
994
#define FF_BUG_XVID_ILACE       4
995
#define FF_BUG_UMP4             8
996
#define FF_BUG_NO_PADDING       16
997
#define FF_BUG_AMV              32
998
#define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
999
#define FF_BUG_QPEL_CHROMA      64
1000
#define FF_BUG_STD_QPEL         128
1001
#define FF_BUG_QPEL_CHROMA2     256
1002
#define FF_BUG_DIRECT_BLOCKSIZE 512
1003
#define FF_BUG_EDGE             1024
1004
#define FF_BUG_HPEL_CHROMA      2048
1005
#define FF_BUG_DC_CLIP          4096
1006
#define FF_BUG_MS               8192 ///< workaround various bugs in microsofts broken decoders
1007
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
1008

    
1009
    /**
1010
     * luma single coeff elimination threshold.
1011
     * - encoding: set by user
1012
     * - decoding: unused
1013
     */
1014
    int luma_elim_threshold;
1015

    
1016
    /**
1017
     * chroma single coeff elimination threshold.
1018
     * - encoding: set by user
1019
     * - decoding: unused
1020
     */
1021
    int chroma_elim_threshold;
1022

    
1023
    /**
1024
     * strictly follow the std (MPEG4, ...).
1025
     * - encoding: set by user
1026
     * - decoding: unused
1027
     */
1028
    int strict_std_compliance;
1029
#define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a older more strict version of the spec or reference software
1030
#define FF_COMPLIANCE_STRICT        1 ///< strictly conform to all the things in the spec no matter what consequences
1031
#define FF_COMPLIANCE_NORMAL        0
1032
#define FF_COMPLIANCE_INOFFICIAL   -1 ///< allow inofficial extensions
1033
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1034

    
1035
    /**
1036
     * qscale offset between ip and b frames.
1037
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1038
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1039
     * - encoding: set by user.
1040
     * - decoding: unused
1041
     */
1042
    float b_quant_offset;
1043

    
1044
    /**
1045
     * error resilience higher values will detect more errors but may missdetect
1046
     * some more or less valid parts as errors.
1047
     * - encoding: unused
1048
     * - decoding: set by user
1049
     */
1050
    int error_resilience;
1051
#define FF_ER_CAREFUL         1
1052
#define FF_ER_COMPLIANT       2
1053
#define FF_ER_AGGRESSIVE      3
1054
#define FF_ER_VERY_AGGRESSIVE 4
1055

    
1056
    /**
1057
     * called at the beginning of each frame to get a buffer for it.
1058
     * if pic.reference is set then the frame will be read later by lavc
1059
     * avcodec_align_dimensions() should be used to find the required width and
1060
     * height, as they normally need to be rounded up to the next multiple of 16
1061
     * - encoding: unused
1062
     * - decoding: set by lavc, user can override
1063
     */
1064
    int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1065

    
1066
    /**
1067
     * called to release buffers which where allocated with get_buffer.
1068
     * a released buffer can be reused in get_buffer()
1069
     * pic.data[*] must be set to NULL
1070
     * - encoding: unused
1071
     * - decoding: set by lavc, user can override
1072
     */
1073
    void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1074

    
1075
    /**
1076
     * if 1 the stream has a 1 frame delay during decoding.
1077
     * - encoding: set by lavc
1078
     * - decoding: set by lavc
1079
     */
1080
    int has_b_frames;
1081

    
1082
    /**
1083
     * number of bytes per packet if constant and known or 0
1084
     * used by some WAV based audio codecs
1085
     */
1086
    int block_align;
1087

    
1088
    int parse_only; /* - decoding only: if true, only parsing is done
1089
                       (function avcodec_parse_frame()). The frame
1090
                       data is returned. Only MPEG codecs support this now. */
1091

    
1092
    /**
1093
     * 0-> h263 quant 1-> mpeg quant.
1094
     * - encoding: set by user.
1095
     * - decoding: unused
1096
     */
1097
    int mpeg_quant;
1098

    
1099
    /**
1100
     * pass1 encoding statistics output buffer.
1101
     * - encoding: set by lavc
1102
     * - decoding: unused
1103
     */
1104
    char *stats_out;
1105

    
1106
    /**
1107
     * pass2 encoding statistics input buffer.
1108
     * concatenated stuff from stats_out of pass1 should be placed here
1109
     * - encoding: allocated/set/freed by user
1110
     * - decoding: unused
1111
     */
1112
    char *stats_in;
1113

    
1114
    /**
1115
     * ratecontrol qmin qmax limiting method.
1116
     * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1117
     * - encoding: set by user.
1118
     * - decoding: unused
1119
     */
1120
    float rc_qsquish;
1121

    
1122
    float rc_qmod_amp;
1123
    int rc_qmod_freq;
1124

    
1125
    /**
1126
     * ratecontrol override, see RcOverride.
1127
     * - encoding: allocated/set/freed by user.
1128
     * - decoding: unused
1129
     */
1130
    RcOverride *rc_override;
1131
    int rc_override_count;
1132

    
1133
    /**
1134
     * rate control equation.
1135
     * - encoding: set by user
1136
     * - decoding: unused
1137
     */
1138
    char *rc_eq;
1139

    
1140
    /**
1141
     * maximum bitrate.
1142
     * - encoding: set by user.
1143
     * - decoding: unused
1144
     */
1145
    int rc_max_rate;
1146

    
1147
    /**
1148
     * minimum bitrate.
1149
     * - encoding: set by user.
1150
     * - decoding: unused
1151
     */
1152
    int rc_min_rate;
1153

    
1154
    /**
1155
     * decoder bitstream buffer size.
1156
     * - encoding: set by user.
1157
     * - decoding: unused
1158
     */
1159
    int rc_buffer_size;
1160
    float rc_buffer_aggressivity;
1161

    
1162
    /**
1163
     * qscale factor between p and i frames.
1164
     * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1165
     * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1166
     * - encoding: set by user.
1167
     * - decoding: unused
1168
     */
1169
    float i_quant_factor;
1170

    
1171
    /**
1172
     * qscale offset between p and i frames.
1173
     * - encoding: set by user.
1174
     * - decoding: unused
1175
     */
1176
    float i_quant_offset;
1177

    
1178
    /**
1179
     * initial complexity for pass1 ratecontrol.
1180
     * - encoding: set by user.
1181
     * - decoding: unused
1182
     */
1183
    float rc_initial_cplx;
1184

    
1185
    /**
1186
     * dct algorithm, see FF_DCT_* below.
1187
     * - encoding: set by user
1188
     * - decoding: unused
1189
     */
1190
    int dct_algo;
1191
#define FF_DCT_AUTO    0
1192
#define FF_DCT_FASTINT 1
1193
#define FF_DCT_INT     2
1194
#define FF_DCT_MMX     3
1195
#define FF_DCT_MLIB    4
1196
#define FF_DCT_ALTIVEC 5
1197
#define FF_DCT_FAAN    6
1198

    
1199
    /**
1200
     * luminance masking (0-> disabled).
1201
     * - encoding: set by user
1202
     * - decoding: unused
1203
     */
1204
    float lumi_masking;
1205

    
1206
    /**
1207
     * temporary complexity masking (0-> disabled).
1208
     * - encoding: set by user
1209
     * - decoding: unused
1210
     */
1211
    float temporal_cplx_masking;
1212

    
1213
    /**
1214
     * spatial complexity masking (0-> disabled).
1215
     * - encoding: set by user
1216
     * - decoding: unused
1217
     */
1218
    float spatial_cplx_masking;
1219

    
1220
    /**
1221
     * p block masking (0-> disabled).
1222
     * - encoding: set by user
1223
     * - decoding: unused
1224
     */
1225
    float p_masking;
1226

    
1227
    /**
1228
     * darkness masking (0-> disabled).
1229
     * - encoding: set by user
1230
     * - decoding: unused
1231
     */
1232
    float dark_masking;
1233

    
1234

    
1235
    /* for binary compatibility */
1236
    int unused;
1237

    
1238
    /**
1239
     * idct algorithm, see FF_IDCT_* below.
1240
     * - encoding: set by user
1241
     * - decoding: set by user
1242
     */
1243
    int idct_algo;
1244
#define FF_IDCT_AUTO         0
1245
#define FF_IDCT_INT          1
1246
#define FF_IDCT_SIMPLE       2
1247
#define FF_IDCT_SIMPLEMMX    3
1248
#define FF_IDCT_LIBMPEG2MMX  4
1249
#define FF_IDCT_PS2          5
1250
#define FF_IDCT_MLIB         6
1251
#define FF_IDCT_ARM          7
1252
#define FF_IDCT_ALTIVEC      8
1253
#define FF_IDCT_SH4          9
1254
#define FF_IDCT_SIMPLEARM    10
1255
#define FF_IDCT_H264         11
1256
#define FF_IDCT_VP3          12
1257
#define FF_IDCT_IPP          13
1258
#define FF_IDCT_XVIDMMX      14
1259
#define FF_IDCT_CAVS         15
1260
#define FF_IDCT_SIMPLEARMV5TE 16
1261
#define FF_IDCT_SIMPLEARMV6  17
1262

    
1263
    /**
1264
     * slice count.
1265
     * - encoding: set by lavc
1266
     * - decoding: set by user (or 0)
1267
     */
1268
    int slice_count;
1269
    /**
1270
     * slice offsets in the frame in bytes.
1271
     * - encoding: set/allocated by lavc
1272
     * - decoding: set/allocated by user (or NULL)
1273
     */
1274
    int *slice_offset;
1275

    
1276
    /**
1277
     * error concealment flags.
1278
     * - encoding: unused
1279
     * - decoding: set by user
1280
     */
1281
    int error_concealment;
1282
#define FF_EC_GUESS_MVS   1
1283
#define FF_EC_DEBLOCK     2
1284

    
1285
    /**
1286
     * dsp_mask could be add used to disable unwanted CPU features
1287
     * CPU features (i.e. MMX, SSE. ...)
1288
     *
1289
     * with FORCE flag you may instead enable given CPU features
1290
     * (Dangerous: usable in case of misdetection, improper usage however will
1291
     * result into program crash)
1292
     */
1293
    unsigned dsp_mask;
1294
#define FF_MM_FORCE    0x80000000 /* force usage of selected flags (OR) */
1295
    /* lower 16 bits - CPU features */
1296
#ifdef HAVE_MMX
1297
#define FF_MM_MMX      0x0001 /* standard MMX */
1298
#define FF_MM_3DNOW    0x0004 /* AMD 3DNOW */
1299
#define FF_MM_MMXEXT   0x0002 /* SSE integer functions or AMD MMX ext */
1300
#define FF_MM_SSE      0x0008 /* SSE functions */
1301
#define FF_MM_SSE2     0x0010 /* PIV SSE2 functions */
1302
#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1303
#endif /* HAVE_MMX */
1304
#ifdef HAVE_IWMMXT
1305
#define FF_MM_IWMMXT   0x0100 /* XScale IWMMXT */
1306
#endif /* HAVE_IWMMXT */
1307

    
1308
    /**
1309
     * bits per sample/pixel from the demuxer (needed for huffyuv).
1310
     * - encoding: set by lavc
1311
     * - decoding: set by user
1312
     */
1313
     int bits_per_sample;
1314

    
1315
    /**
1316
     * prediction method (needed for huffyuv).
1317
     * - encoding: set by user
1318
     * - decoding: unused
1319
     */
1320
     int prediction_method;
1321
#define FF_PRED_LEFT   0
1322
#define FF_PRED_PLANE  1
1323
#define FF_PRED_MEDIAN 2
1324

    
1325
    /**
1326
     * sample aspect ratio (0 if unknown).
1327
     * numerator and denominator must be relative prime and smaller then 256 for some video standards
1328
     * - encoding: set by user.
1329
     * - decoding: set by lavc.
1330
     */
1331
    AVRational sample_aspect_ratio;
1332

    
1333
    /**
1334
     * the picture in the bitstream.
1335
     * - encoding: set by lavc
1336
     * - decoding: set by lavc
1337
     */
1338
    AVFrame *coded_frame;
1339

    
1340
    /**
1341
     * debug.
1342
     * - encoding: set by user.
1343
     * - decoding: set by user.
1344
     */
1345
    int debug;
1346
#define FF_DEBUG_PICT_INFO 1
1347
#define FF_DEBUG_RC        2
1348
#define FF_DEBUG_BITSTREAM 4
1349
#define FF_DEBUG_MB_TYPE   8
1350
#define FF_DEBUG_QP        16
1351
#define FF_DEBUG_MV        32
1352
#define FF_DEBUG_DCT_COEFF 0x00000040
1353
#define FF_DEBUG_SKIP      0x00000080
1354
#define FF_DEBUG_STARTCODE 0x00000100
1355
#define FF_DEBUG_PTS       0x00000200
1356
#define FF_DEBUG_ER        0x00000400
1357
#define FF_DEBUG_MMCO      0x00000800
1358
#define FF_DEBUG_BUGS      0x00001000
1359
#define FF_DEBUG_VIS_QP    0x00002000
1360
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1361

    
1362
    /**
1363
     * debug.
1364
     * - encoding: set by user.
1365
     * - decoding: set by user.
1366
     */
1367
    int debug_mv;
1368
#define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1369
#define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1370
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1371

    
1372
    /**
1373
     * error.
1374
     * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1375
     * - decoding: unused
1376
     */
1377
    uint64_t error[4];
1378

    
1379
    /**
1380
     * minimum MB quantizer.
1381
     * - encoding: unused
1382
     * - decoding: unused
1383
     */
1384
    int mb_qmin;
1385

    
1386
    /**
1387
     * maximum MB quantizer.
1388
     * - encoding: unused
1389
     * - decoding: unused
1390
     */
1391
    int mb_qmax;
1392

    
1393
    /**
1394
     * motion estimation compare function.
1395
     * - encoding: set by user.
1396
     * - decoding: unused
1397
     */
1398
    int me_cmp;
1399
    /**
1400
     * subpixel motion estimation compare function.
1401
     * - encoding: set by user.
1402
     * - decoding: unused
1403
     */
1404
    int me_sub_cmp;
1405
    /**
1406
     * macroblock compare function (not supported yet).
1407
     * - encoding: set by user.
1408
     * - decoding: unused
1409
     */
1410
    int mb_cmp;
1411
    /**
1412
     * interlaced dct compare function
1413
     * - encoding: set by user.
1414
     * - decoding: unused
1415
     */
1416
    int ildct_cmp;
1417
#define FF_CMP_SAD  0
1418
#define FF_CMP_SSE  1
1419
#define FF_CMP_SATD 2
1420
#define FF_CMP_DCT  3
1421
#define FF_CMP_PSNR 4
1422
#define FF_CMP_BIT  5
1423
#define FF_CMP_RD   6
1424
#define FF_CMP_ZERO 7
1425
#define FF_CMP_VSAD 8
1426
#define FF_CMP_VSSE 9
1427
#define FF_CMP_NSSE 10
1428
#define FF_CMP_W53  11
1429
#define FF_CMP_W97  12
1430
#define FF_CMP_DCTMAX 13
1431
#define FF_CMP_DCT264 14
1432
#define FF_CMP_CHROMA 256
1433

    
1434
    /**
1435
     * ME diamond size & shape.
1436
     * - encoding: set by user.
1437
     * - decoding: unused
1438
     */
1439
    int dia_size;
1440

    
1441
    /**
1442
     * amount of previous MV predictors (2a+1 x 2a+1 square).
1443
     * - encoding: set by user.
1444
     * - decoding: unused
1445
     */
1446
    int last_predictor_count;
1447

    
1448
    /**
1449
     * pre pass for motion estimation.
1450
     * - encoding: set by user.
1451
     * - decoding: unused
1452
     */
1453
    int pre_me;
1454

    
1455
    /**
1456
     * motion estimation pre pass compare function.
1457
     * - encoding: set by user.
1458
     * - decoding: unused
1459
     */
1460
    int me_pre_cmp;
1461

    
1462
    /**
1463
     * ME pre pass diamond size & shape.
1464
     * - encoding: set by user.
1465
     * - decoding: unused
1466
     */
1467
    int pre_dia_size;
1468

    
1469
    /**
1470
     * subpel ME quality.
1471
     * - encoding: set by user.
1472
     * - decoding: unused
1473
     */
1474
    int me_subpel_quality;
1475

    
1476
    /**
1477
     * callback to negotiate the pixelFormat.
1478
     * @param fmt is the list of formats which are supported by the codec,
1479
     * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1480
     * the first is allways the native one
1481
     * @return the choosen format
1482
     * - encoding: unused
1483
     * - decoding: set by user, if not set then the native format will always be choosen
1484
     */
1485
    enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1486

    
1487
    /**
1488
     * DTG active format information (additionnal aspect ratio
1489
     * information only used in DVB MPEG2 transport streams). 0 if
1490
     * not set.
1491
     *
1492
     * - encoding: unused.
1493
     * - decoding: set by decoder
1494
     */
1495
    int dtg_active_format;
1496
#define FF_DTG_AFD_SAME         8
1497
#define FF_DTG_AFD_4_3          9
1498
#define FF_DTG_AFD_16_9         10
1499
#define FF_DTG_AFD_14_9         11
1500
#define FF_DTG_AFD_4_3_SP_14_9  13
1501
#define FF_DTG_AFD_16_9_SP_14_9 14
1502
#define FF_DTG_AFD_SP_4_3       15
1503

    
1504
    /**
1505
     * Maximum motion estimation search range in subpel units.
1506
     * if 0 then no limit
1507
     *
1508
     * - encoding: set by user.
1509
     * - decoding: unused.
1510
     */
1511
    int me_range;
1512

    
1513
    /**
1514
     * intra quantizer bias.
1515
     * - encoding: set by user.
1516
     * - decoding: unused
1517
     */
1518
    int intra_quant_bias;
1519
#define FF_DEFAULT_QUANT_BIAS 999999
1520

    
1521
    /**
1522
     * inter quantizer bias.
1523
     * - encoding: set by user.
1524
     * - decoding: unused
1525
     */
1526
    int inter_quant_bias;
1527

    
1528
    /**
1529
     * color table ID.
1530
     * - encoding: unused.
1531
     * - decoding: which clrtable should be used for 8bit RGB images
1532
     *             table have to be stored somewhere FIXME
1533
     */
1534
    int color_table_id;
1535

    
1536
    /**
1537
     * internal_buffer count.
1538
     * Don't touch, used by lavc default_get_buffer()
1539
     */
1540
    int internal_buffer_count;
1541

    
1542
    /**
1543
     * internal_buffers.
1544
     * Don't touch, used by lavc default_get_buffer()
1545
     */
1546
    void *internal_buffer;
1547

    
1548
#define FF_LAMBDA_SHIFT 7
1549
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1550
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1551
#define FF_LAMBDA_MAX (256*128-1)
1552

    
1553
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1554
    /**
1555
     * global quality for codecs which cannot change it per frame.
1556
     * this should be proportional to MPEG1/2/4 qscale.
1557
     * - encoding: set by user.
1558
     * - decoding: unused
1559
     */
1560
    int global_quality;
1561

    
1562
#define FF_CODER_TYPE_VLC   0
1563
#define FF_CODER_TYPE_AC    1
1564
    /**
1565
     * coder type
1566
     * - encoding: set by user.
1567
     * - decoding: unused
1568
     */
1569
    int coder_type;
1570

    
1571
    /**
1572
     * context model
1573
     * - encoding: set by user.
1574
     * - decoding: unused
1575
     */
1576
    int context_model;
1577
#if 0
1578
    /**
1579
     *
1580
     * - encoding: unused
1581
     * - decoding: set by user.
1582
     */
1583
    uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1584
#endif
1585

    
1586
    /**
1587
     * slice flags
1588
     * - encoding: unused
1589
     * - decoding: set by user.
1590
     */
1591
    int slice_flags;
1592
#define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1593
#define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1594
#define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1595

    
1596
    /**
1597
     * XVideo Motion Acceleration
1598
     * - encoding: forbidden
1599
     * - decoding: set by decoder
1600
     */
1601
    int xvmc_acceleration;
1602

    
1603
    /**
1604
     * macroblock decision mode
1605
     * - encoding: set by user.
1606
     * - decoding: unused
1607
     */
1608
    int mb_decision;
1609
#define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1610
#define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1611
#define FF_MB_DECISION_RD     2        ///< rate distoration
1612

    
1613
    /**
1614
     * custom intra quantization matrix
1615
     * - encoding: set by user, can be NULL
1616
     * - decoding: set by lavc
1617
     */
1618
    uint16_t *intra_matrix;
1619

    
1620
    /**
1621
     * custom inter quantization matrix
1622
     * - encoding: set by user, can be NULL
1623
     * - decoding: set by lavc
1624
     */
1625
    uint16_t *inter_matrix;
1626

    
1627
    /**
1628
     * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1629
     * this is used to workaround some encoder bugs
1630
     * - encoding: unused
1631
     * - decoding: set by user, will be converted to upper case by lavc during init
1632
     */
1633
    unsigned int stream_codec_tag;
1634

    
1635
    /**
1636
     * scene change detection threshold.
1637
     * 0 is default, larger means fewer detected scene changes
1638
     * - encoding: set by user.
1639
     * - decoding: unused
1640
     */
1641
    int scenechange_threshold;
1642

    
1643
    /**
1644
     * minimum lagrange multipler
1645
     * - encoding: set by user.
1646
     * - decoding: unused
1647
     */
1648
    int lmin;
1649

    
1650
    /**
1651
     * maximum lagrange multipler
1652
     * - encoding: set by user.
1653
     * - decoding: unused
1654
     */
1655
    int lmax;
1656

    
1657
    /**
1658
     * Palette control structure
1659
     * - encoding: ??? (no palette-enabled encoder yet)
1660
     * - decoding: set by user.
1661
     */
1662
    struct AVPaletteControl *palctrl;
1663

    
1664
    /**
1665
     * noise reduction strength
1666
     * - encoding: set by user.
1667
     * - decoding: unused
1668
     */
1669
    int noise_reduction;
1670

    
1671
    /**
1672
     * called at the beginning of a frame to get cr buffer for it.
1673
     * buffer type (size, hints) must be the same. lavc won't check it.
1674
     * lavc will pass previous buffer in pic, function should return
1675
     * same buffer or new buffer with old frame "painted" into it.
1676
     * if pic.data[0] == NULL must behave like get_buffer().
1677
     * - encoding: unused
1678
     * - decoding: set by lavc, user can override
1679
     */
1680
    int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1681

    
1682
    /**
1683
     * number of bits which should be loaded into the rc buffer before decoding starts
1684
     * - encoding: set by user.
1685
     * - decoding: unused
1686
     */
1687
    int rc_initial_buffer_occupancy;
1688

    
1689
    /**
1690
     *
1691
     * - encoding: set by user.
1692
     * - decoding: unused
1693
     */
1694
    int inter_threshold;
1695

    
1696
    /**
1697
     * CODEC_FLAG2_*.
1698
     * - encoding: set by user.
1699
     * - decoding: set by user.
1700
     */
1701
    int flags2;
1702

    
1703
    /**
1704
     * simulates errors in the bitstream to test error concealment.
1705
     * - encoding: set by user.
1706
     * - decoding: unused.
1707
     */
1708
    int error_rate;
1709

    
1710
    /**
1711
     * MP3 antialias algorithm, see FF_AA_* below.
1712
     * - encoding: unused
1713
     * - decoding: set by user
1714
     */
1715
    int antialias_algo;
1716
#define FF_AA_AUTO    0
1717
#define FF_AA_FASTINT 1 //not implemented yet
1718
#define FF_AA_INT     2
1719
#define FF_AA_FLOAT   3
1720
    /**
1721
     * Quantizer noise shaping.
1722
     * - encoding: set by user
1723
     * - decoding: unused
1724
     */
1725
    int quantizer_noise_shaping;
1726

    
1727
    /**
1728
     * Thread count.
1729
     * is used to decide how many independent tasks should be passed to execute()
1730
     * - encoding: set by user
1731
     * - decoding: set by user
1732
     */
1733
    int thread_count;
1734

    
1735
    /**
1736
     * the codec may call this to execute several independent things. it will return only after
1737
     * finishing all tasks, the user may replace this with some multithreaded implementation, the
1738
     * default implementation will execute the parts serially
1739
     * @param count the number of things to execute
1740
     * - encoding: set by lavc, user can override
1741
     * - decoding: set by lavc, user can override
1742
     */
1743
    int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1744

    
1745
    /**
1746
     * Thread opaque.
1747
     * can be used by execute() to store some per AVCodecContext stuff.
1748
     * - encoding: set by execute()
1749
     * - decoding: set by execute()
1750
     */
1751
    void *thread_opaque;
1752

    
1753
    /**
1754
     * Motion estimation threshold. under which no motion estimation is
1755
     * performed, but instead the user specified motion vectors are used
1756
     *
1757
     * - encoding: set by user
1758
     * - decoding: unused
1759
     */
1760
     int me_threshold;
1761

    
1762
    /**
1763
     * Macroblock threshold. under which the user specified macroblock types will be used
1764
     * - encoding: set by user
1765
     * - decoding: unused
1766
     */
1767
     int mb_threshold;
1768

    
1769
    /**
1770
     * precision of the intra dc coefficient - 8.
1771
     * - encoding: set by user
1772
     * - decoding: unused
1773
     */
1774
     int intra_dc_precision;
1775

    
1776
    /**
1777
     * noise vs. sse weight for the nsse comparsion function.
1778
     * - encoding: set by user
1779
     * - decoding: unused
1780
     */
1781
     int nsse_weight;
1782

    
1783
    /**
1784
     * number of macroblock rows at the top which are skipped.
1785
     * - encoding: unused
1786
     * - decoding: set by user
1787
     */
1788
     int skip_top;
1789

    
1790
    /**
1791
     * number of macroblock rows at the bottom which are skipped.
1792
     * - encoding: unused
1793
     * - decoding: set by user
1794
     */
1795
     int skip_bottom;
1796

    
1797
    /**
1798
     * profile
1799
     * - encoding: set by user
1800
     * - decoding: set by lavc
1801
     */
1802
     int profile;
1803
#define FF_PROFILE_UNKNOWN -99
1804

    
1805
    /**
1806
     * level
1807
     * - encoding: set by user
1808
     * - decoding: set by lavc
1809
     */
1810
     int level;
1811
#define FF_LEVEL_UNKNOWN -99
1812

    
1813
    /**
1814
     * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1815
     * - encoding: unused
1816
     * - decoding: set by user
1817
     */
1818
     int lowres;
1819

    
1820
    /**
1821
     * bitsream width / height. may be different from width/height if lowres
1822
     * or other things are used
1823
     * - encoding: unused
1824
     * - decoding: set by user before init if known, codec should override / dynamically change if needed
1825
     */
1826
    int coded_width, coded_height;
1827

    
1828
    /**
1829
     * frame skip threshold
1830
     * - encoding: set by user
1831
     * - decoding: unused
1832
     */
1833
    int frame_skip_threshold;
1834

    
1835
    /**
1836
     * frame skip factor
1837
     * - encoding: set by user
1838
     * - decoding: unused
1839
     */
1840
    int frame_skip_factor;
1841

    
1842
    /**
1843
     * frame skip exponent
1844
     * - encoding: set by user
1845
     * - decoding: unused
1846
     */
1847
    int frame_skip_exp;
1848

    
1849
    /**
1850
     * frame skip comparission function
1851
     * - encoding: set by user.
1852
     * - decoding: unused
1853
     */
1854
    int frame_skip_cmp;
1855

    
1856
    /**
1857
     * border processing masking. raises the quantizer for mbs on the borders
1858
     * of the picture.
1859
     * - encoding: set by user
1860
     * - decoding: unused
1861
     */
1862
    float border_masking;
1863

    
1864
    /**
1865
     * minimum MB lagrange multipler.
1866
     * - encoding: set by user.
1867
     * - decoding: unused
1868
     */
1869
    int mb_lmin;
1870

    
1871
    /**
1872
     * maximum MB lagrange multipler.
1873
     * - encoding: set by user.
1874
     * - decoding: unused
1875
     */
1876
    int mb_lmax;
1877

    
1878
    /**
1879
     *
1880
     * - encoding: set by user.
1881
     * - decoding: unused
1882
     */
1883
    int me_penalty_compensation;
1884

    
1885
    /**
1886
     *
1887
     * - encoding: unused
1888
     * - decoding: set by user.
1889
     */
1890
    enum AVDiscard skip_loop_filter;
1891

    
1892
    /**
1893
     *
1894
     * - encoding: unused
1895
     * - decoding: set by user.
1896
     */
1897
    enum AVDiscard skip_idct;
1898

    
1899
    /**
1900
     *
1901
     * - encoding: unused
1902
     * - decoding: set by user.
1903
     */
1904
    enum AVDiscard skip_frame;
1905

    
1906
    /**
1907
     *
1908
     * - encoding: set by user.
1909
     * - decoding: unused
1910
     */
1911
    int bidir_refine;
1912

    
1913
    /**
1914
     *
1915
     * - encoding: set by user.
1916
     * - decoding: unused
1917
     */
1918
    int brd_scale;
1919

    
1920
    /**
1921
     * constant rate factor - quality-based VBR - values ~correspond to qps
1922
     * - encoding: set by user.
1923
     * - decoding: unused
1924
     */
1925
    float crf;
1926

    
1927
    /**
1928
     * constant quantization parameter rate control method
1929
     * - encoding: set by user.
1930
     * - decoding: unused
1931
     */
1932
    int cqp;
1933

    
1934
    /**
1935
     * minimum gop size
1936
     * - encoding: set by user.
1937
     * - decoding: unused
1938
     */
1939
    int keyint_min;
1940

    
1941
    /**
1942
     * number of reference frames
1943
     * - encoding: set by user.
1944
     * - decoding: unused
1945
     */
1946
    int refs;
1947

    
1948
    /**
1949
     * chroma qp offset from luma
1950
     * - encoding: set by user.
1951
     * - decoding: unused
1952
     */
1953
    int chromaoffset;
1954

    
1955
    /**
1956
     * influences how often b-frames are used
1957
     * - encoding: set by user.
1958
     * - decoding: unused
1959
     */
1960
    int bframebias;
1961

    
1962
    /**
1963
     * trellis RD quantization
1964
     * - encoding: set by user.
1965
     * - decoding: unused
1966
     */
1967
    int trellis;
1968

    
1969
    /**
1970
     * reduce fluctuations in qp (before curve compression)
1971
     * - encoding: set by user.
1972
     * - decoding: unused
1973
     */
1974
    float complexityblur;
1975

    
1976
    /**
1977
     * in-loop deblocking filter alphac0 parameter
1978
     * alpha is in the range -6...6
1979
     * - encoding: set by user.
1980
     * - decoding: unused
1981
     */
1982
    int deblockalpha;
1983

    
1984
    /**
1985
     * in-loop deblocking filter beta parameter
1986
     * beta is in the range -6...6
1987
     * - encoding: set by user.
1988
     * - decoding: unused
1989
     */
1990
    int deblockbeta;
1991

    
1992
    /**
1993
     * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1994
     * - encoding: set by user.
1995
     * - decoding: unused
1996
     */
1997
    int partitions;
1998
#define X264_PART_I4X4 0x001  /* Analyse i4x4 */
1999
#define X264_PART_I8X8 0x002  /* Analyse i8x8 (requires 8x8 transform) */
2000
#define X264_PART_P8X8 0x010  /* Analyse p16x8, p8x16 and p8x8 */
2001
#define X264_PART_P4X4 0x020  /* Analyse p8x4, p4x8, p4x4 */
2002
#define X264_PART_B8X8 0x100  /* Analyse b16x8, b8x16 and b8x8 */
2003

    
2004
    /**
2005
     * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2006
     * - encoding: set by user.
2007
     * - decoding: unused
2008
     */
2009
    int directpred;
2010

    
2011
    /**
2012
     * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
2013
     * - encoding: set by user.
2014
     * - decoding: unused
2015
     */
2016
    int cutoff;
2017

    
2018
    /**
2019
     * multiplied by qscale for each frame and added to scene_change_score
2020
     * - encoding: set by user.
2021
     * - decoding: unused
2022
     */
2023
    int scenechange_factor;
2024

    
2025
    /**
2026
     *
2027
     * note: value depends upon the compare functin used for fullpel ME
2028
     * - encoding: set by user.
2029
     * - decoding: unused
2030
     */
2031
    int mv0_threshold;
2032

    
2033
    /**
2034
     * adjusts sensitivity of b_frame_strategy 1
2035
     * - encoding: set by user.
2036
     * - decoding: unused
2037
     */
2038
    int b_sensitivity;
2039

    
2040
    /**
2041
     * - encoding: set by user.
2042
     * - decoding: unused
2043
     */
2044
    int compression_level;
2045
#define FF_COMPRESSION_DEFAULT -1
2046

    
2047
    /**
2048
     * sets whether to use LPC mode - used by FLAC encoder
2049
     * - encoding: set by user.
2050
     * - decoding: unused.
2051
     */
2052
    int use_lpc;
2053

    
2054
    /**
2055
     * LPC coefficient precision - used by FLAC encoder
2056
     * - encoding: set by user.
2057
     * - decoding: unused.
2058
     */
2059
    int lpc_coeff_precision;
2060

    
2061
    /**
2062
     * - encoding: set by user.
2063
     * - decoding: unused.
2064
     */
2065
    int min_prediction_order;
2066

    
2067
    /**
2068
     * - encoding: set by user.
2069
     * - decoding: unused.
2070
     */
2071
    int max_prediction_order;
2072

    
2073
    /**
2074
     * search method for selecting prediction order
2075
     * - encoding: set by user.
2076
     * - decoding: unused.
2077
     */
2078
    int prediction_order_method;
2079

    
2080
    /**
2081
     * - encoding: set by user.
2082
     * - decoding: unused.
2083
     */
2084
    int min_partition_order;
2085

    
2086
    /**
2087
     * - encoding: set by user.
2088
     * - decoding: unused.
2089
     */
2090
    int max_partition_order;
2091

    
2092
    /**
2093
     * GOP timecode frame start number, in non drop frame format
2094
     * - encoding: set by user.
2095
     * - decoding: unused.
2096
     */
2097
    int64_t timecode_frame_start;
2098
} AVCodecContext;
2099

    
2100
/**
2101
 * AVCodec.
2102
 */
2103
typedef struct AVCodec {
2104
    const char *name;
2105
    enum CodecType type;
2106
    enum CodecID id;
2107
    int priv_data_size;
2108
    int (*init)(AVCodecContext *);
2109
    int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2110
    int (*close)(AVCodecContext *);
2111
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2112
                  uint8_t *buf, int buf_size);
2113
    int capabilities;
2114
    struct AVCodec *next;
2115
    void (*flush)(AVCodecContext *);
2116
    const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2117
    const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2118
} AVCodec;
2119

    
2120
/**
2121
 * four components are given, that's all.
2122
 * the last component is alpha
2123
 */
2124
typedef struct AVPicture {
2125
    uint8_t *data[4];
2126
    int linesize[4];       ///< number of bytes per line
2127
} AVPicture;
2128

    
2129
/**
2130
 * AVPaletteControl
2131
 * This structure defines a method for communicating palette changes
2132
 * between and demuxer and a decoder.
2133
 * this is totally broken, palette changes should be sent as AVPackets
2134
 */
2135
#define AVPALETTE_SIZE 1024
2136
#define AVPALETTE_COUNT 256
2137
typedef struct AVPaletteControl {
2138

    
2139
    /* demuxer sets this to 1 to indicate the palette has changed;
2140
     * decoder resets to 0 */
2141
    int palette_changed;
2142

    
2143
    /* 4-byte ARGB palette entries, stored in native byte order; note that
2144
     * the individual palette components should be on a 8-bit scale; if
2145
     * the palette data comes from a IBM VGA native format, the component
2146
     * data is probably 6 bits in size and needs to be scaled */
2147
    unsigned int palette[AVPALETTE_COUNT];
2148

    
2149
} AVPaletteControl attribute_deprecated;
2150

    
2151
typedef struct AVSubtitleRect {
2152
    uint16_t x;
2153
    uint16_t y;
2154
    uint16_t w;
2155
    uint16_t h;
2156
    uint16_t nb_colors;
2157
    int linesize;
2158
    uint32_t *rgba_palette;
2159
    uint8_t *bitmap;
2160
} AVSubtitleRect;
2161

    
2162
typedef struct AVSubtitle {
2163
    uint16_t format; /* 0 = graphics */
2164
    uint32_t start_display_time; /* relative to packet pts, in ms */
2165
    uint32_t end_display_time; /* relative to packet pts, in ms */
2166
    uint32_t num_rects;
2167
    AVSubtitleRect *rects;
2168
} AVSubtitle;
2169

    
2170
extern AVCodec ac3_encoder;
2171
extern AVCodec amr_nb_encoder;
2172
extern AVCodec amr_wb_encoder;
2173
extern AVCodec asv1_encoder;
2174
extern AVCodec asv2_encoder;
2175
extern AVCodec bmp_encoder;
2176
extern AVCodec dvvideo_encoder;
2177
extern AVCodec faac_encoder;
2178
extern AVCodec ffv1_encoder;
2179
extern AVCodec ffvhuff_encoder;
2180
extern AVCodec flac_encoder;
2181
extern AVCodec flashsv_encoder;
2182
extern AVCodec flv_encoder;
2183
extern AVCodec gif_encoder;
2184
extern AVCodec h261_encoder;
2185
extern AVCodec h263_encoder;
2186
extern AVCodec h263p_encoder;
2187
extern AVCodec h264_encoder;
2188
extern AVCodec huffyuv_encoder;
2189
extern AVCodec jpegls_encoder;
2190
extern AVCodec libgsm_encoder;
2191
extern AVCodec libgsm_ms_encoder;
2192
extern AVCodec libtheora_encoder;
2193
extern AVCodec ljpeg_encoder;
2194
extern AVCodec mdec_encoder;
2195
extern AVCodec mjpeg_encoder;
2196
extern AVCodec mp2_encoder;
2197
extern AVCodec mp3lame_encoder;
2198
extern AVCodec mpeg1video_encoder;
2199
extern AVCodec mpeg2video_encoder;
2200
extern AVCodec mpeg4_encoder;
2201
extern AVCodec msmpeg4v1_encoder;
2202
extern AVCodec msmpeg4v2_encoder;
2203
extern AVCodec msmpeg4v3_encoder;
2204
extern AVCodec oggvorbis_encoder;
2205
extern AVCodec pam_encoder;
2206
extern AVCodec pbm_encoder;
2207
extern AVCodec pgm_encoder;
2208
extern AVCodec pgmyuv_encoder;
2209
extern AVCodec png_encoder;
2210
extern AVCodec ppm_encoder;
2211
extern AVCodec rv10_encoder;
2212
extern AVCodec rv20_encoder;
2213
extern AVCodec snow_encoder;
2214
extern AVCodec sonic_encoder;
2215
extern AVCodec sonic_ls_encoder;
2216
extern AVCodec svq1_encoder;
2217
extern AVCodec targa_encoder;
2218
extern AVCodec vcr1_encoder;
2219
extern AVCodec vorbis_encoder;
2220
extern AVCodec wmav1_encoder;
2221
extern AVCodec wmav2_encoder;
2222
extern AVCodec wmv1_encoder;
2223
extern AVCodec wmv2_encoder;
2224
extern AVCodec x264_encoder;
2225
extern AVCodec xvid_encoder;
2226
extern AVCodec zlib_encoder;
2227
extern AVCodec zmbv_encoder;
2228

    
2229
extern AVCodec aac_decoder;
2230
extern AVCodec aasc_decoder;
2231
extern AVCodec alac_decoder;
2232
extern AVCodec amr_nb_decoder;
2233
extern AVCodec amr_wb_decoder;
2234
extern AVCodec asv1_decoder;
2235
extern AVCodec asv2_decoder;
2236
extern AVCodec avs_decoder;
2237
extern AVCodec bmp_decoder;
2238
extern AVCodec cavs_decoder;
2239
extern AVCodec cinepak_decoder;
2240
extern AVCodec cljr_decoder;
2241
extern AVCodec cook_decoder;
2242
extern AVCodec cscd_decoder;
2243
extern AVCodec cyuv_decoder;
2244
extern AVCodec dca_decoder;
2245
extern AVCodec dnxhd_decoder;
2246
extern AVCodec dsicinaudio_decoder;
2247
extern AVCodec dsicinvideo_decoder;
2248
extern AVCodec dvvideo_decoder;
2249
extern AVCodec dxa_decoder;
2250
extern AVCodec eightbps_decoder;
2251
extern AVCodec ffv1_decoder;
2252
extern AVCodec ffvhuff_decoder;
2253
extern AVCodec flac_decoder;
2254
extern AVCodec flashsv_decoder;
2255
extern AVCodec flic_decoder;
2256
extern AVCodec flv_decoder;
2257
extern AVCodec fourxm_decoder;
2258
extern AVCodec fraps_decoder;
2259
extern AVCodec gif_decoder;
2260
extern AVCodec h261_decoder;
2261
extern AVCodec h263_decoder;
2262
extern AVCodec h263i_decoder;
2263
extern AVCodec h264_decoder;
2264
extern AVCodec huffyuv_decoder;
2265
extern AVCodec idcin_decoder;
2266
extern AVCodec imc_decoder;
2267
extern AVCodec indeo2_decoder;
2268
extern AVCodec indeo3_decoder;
2269
extern AVCodec interplay_dpcm_decoder;
2270
extern AVCodec interplay_video_decoder;
2271
extern AVCodec kmvc_decoder;
2272
extern AVCodec libgsm_decoder;
2273
extern AVCodec libgsm_ms_decoder;
2274
extern AVCodec loco_decoder;
2275
extern AVCodec mace3_decoder;
2276
extern AVCodec mace6_decoder;
2277
extern AVCodec mdec_decoder;
2278
extern AVCodec mjpeg_decoder;
2279
extern AVCodec mjpegb_decoder;
2280
extern AVCodec mmvideo_decoder;
2281
extern AVCodec mp2_decoder;
2282
extern AVCodec mp3_decoder;
2283
extern AVCodec mp3adu_decoder;
2284
extern AVCodec mp3on4_decoder;
2285
extern AVCodec mpc7_decoder;
2286
extern AVCodec mpeg1video_decoder;
2287
extern AVCodec mpeg2video_decoder;
2288
extern AVCodec mpeg4_decoder;
2289
extern AVCodec mpeg4aac_decoder;
2290
extern AVCodec mpeg_xvmc_decoder;
2291
extern AVCodec mpegvideo_decoder;
2292
extern AVCodec msmpeg4v1_decoder;
2293
extern AVCodec msmpeg4v2_decoder;
2294
extern AVCodec msmpeg4v3_decoder;
2295
extern AVCodec msrle_decoder;
2296
extern AVCodec msvideo1_decoder;
2297
extern AVCodec mszh_decoder;
2298
extern AVCodec nuv_decoder;
2299
extern AVCodec oggvorbis_decoder;
2300
extern AVCodec png_decoder;
2301
extern AVCodec qdm2_decoder;
2302
extern AVCodec qdraw_decoder;
2303
extern AVCodec qpeg_decoder;
2304
extern AVCodec qtrle_decoder;
2305
extern AVCodec ra_144_decoder;
2306
extern AVCodec ra_288_decoder;
2307
extern AVCodec roq_decoder;
2308
extern AVCodec roq_dpcm_decoder;
2309
extern AVCodec rpza_decoder;
2310
extern AVCodec rv10_decoder;
2311
extern AVCodec rv20_decoder;
2312
extern AVCodec rv30_decoder;
2313
extern AVCodec rv40_decoder;
2314
extern AVCodec shorten_decoder;
2315
extern AVCodec smackaud_decoder;
2316
extern AVCodec smacker_decoder;
2317
extern AVCodec smc_decoder;
2318
extern AVCodec snow_decoder;
2319
extern AVCodec sol_dpcm_decoder;
2320
extern AVCodec sonic_decoder;
2321
extern AVCodec sp5x_decoder;
2322
extern AVCodec svq1_decoder;
2323
extern AVCodec svq3_decoder;
2324
extern AVCodec targa_decoder;
2325
extern AVCodec theora_decoder;
2326
extern AVCodec tiertexseqvideo_decoder;
2327
extern AVCodec tiff_decoder;
2328
extern AVCodec truemotion1_decoder;
2329
extern AVCodec truemotion2_decoder;
2330
extern AVCodec truespeech_decoder;
2331
extern AVCodec tscc_decoder;
2332
extern AVCodec tta_decoder;
2333
extern AVCodec ulti_decoder;
2334
extern AVCodec vc1_decoder;
2335
extern AVCodec vcr1_decoder;
2336
extern AVCodec vmdaudio_decoder;
2337
extern AVCodec vmdvideo_decoder;
2338
extern AVCodec vmnc_decoder;
2339
extern AVCodec vorbis_decoder;
2340
extern AVCodec vp3_decoder;
2341
extern AVCodec vp5_decoder;
2342
extern AVCodec vp6_decoder;
2343
extern AVCodec vp6f_decoder;
2344
extern AVCodec vqa_decoder;
2345
extern AVCodec wavpack_decoder;
2346
extern AVCodec wmav1_decoder;
2347
extern AVCodec wmav2_decoder;
2348
extern AVCodec wmv1_decoder;
2349
extern AVCodec wmv2_decoder;
2350
extern AVCodec wmv3_decoder;
2351
extern AVCodec wnv1_decoder;
2352
extern AVCodec ws_snd1_decoder;
2353
extern AVCodec xan_dpcm_decoder;
2354
extern AVCodec xan_wc3_decoder;
2355
extern AVCodec xl_decoder;
2356
extern AVCodec zlib_decoder;
2357
extern AVCodec zmbv_decoder;
2358

    
2359
/* pcm codecs */
2360
#define PCM_CODEC(id, name) \
2361
extern AVCodec name ## _decoder; \
2362
extern AVCodec name ## _encoder
2363

    
2364
PCM_CODEC(CODEC_ID_PCM_ALAW,    pcm_alaw);
2365
PCM_CODEC(CODEC_ID_PCM_MULAW,   pcm_mulaw);
2366
PCM_CODEC(CODEC_ID_PCM_S8,      pcm_s8);
2367
PCM_CODEC(CODEC_ID_PCM_S16BE,   pcm_s16be);
2368
PCM_CODEC(CODEC_ID_PCM_S16LE,   pcm_s16le);
2369
PCM_CODEC(CODEC_ID_PCM_S24BE,   pcm_s24be);
2370
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2371
PCM_CODEC(CODEC_ID_PCM_S24LE,   pcm_s24le);
2372
PCM_CODEC(CODEC_ID_PCM_S32BE,   pcm_s32be);
2373
PCM_CODEC(CODEC_ID_PCM_S32LE,   pcm_s32le);
2374
PCM_CODEC(CODEC_ID_PCM_U8,      pcm_u8);
2375
PCM_CODEC(CODEC_ID_PCM_U16BE,   pcm_u16be);
2376
PCM_CODEC(CODEC_ID_PCM_U16LE,   pcm_u16le);
2377
PCM_CODEC(CODEC_ID_PCM_U24BE,   pcm_u24be);
2378
PCM_CODEC(CODEC_ID_PCM_U24LE,   pcm_u24le);
2379
PCM_CODEC(CODEC_ID_PCM_U32BE,   pcm_u32be);
2380
PCM_CODEC(CODEC_ID_PCM_U32LE,   pcm_u32le);
2381

    
2382
/* adpcm codecs */
2383

    
2384
PCM_CODEC(CODEC_ID_ADPCM_4XM,     adpcm_4xm);
2385
PCM_CODEC(CODEC_ID_ADPCM_ADX,     adpcm_adx);
2386
PCM_CODEC(CODEC_ID_ADPCM_CT,      adpcm_ct);
2387
PCM_CODEC(CODEC_ID_ADPCM_EA,      adpcm_ea);
2388
PCM_CODEC(CODEC_ID_ADPCM_G726,    adpcm_g726);
2389
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2390
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2391
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT,  adpcm_ima_qt);
2392
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2393
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS,  adpcm_ima_ws);
2394
PCM_CODEC(CODEC_ID_ADPCM_MS,      adpcm_ms);
2395
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2396
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2397
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2398
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG,  adpcm_ima_smjpeg);
2399
PCM_CODEC(CODEC_ID_ADPCM_SWF,     adpcm_swf);
2400
PCM_CODEC(CODEC_ID_ADPCM_XA,      adpcm_xa);
2401
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA,  adpcm_yamaha);
2402

    
2403
#undef PCM_CODEC
2404

    
2405
/* dummy raw video codec */
2406
extern AVCodec rawvideo_decoder;
2407
extern AVCodec rawvideo_encoder;
2408

    
2409
/* the following codecs use external GPL libs */
2410
extern AVCodec dts_decoder;
2411
extern AVCodec liba52_decoder;
2412

    
2413
/* subtitles */
2414
extern AVCodec dvbsub_decoder;
2415
extern AVCodec dvbsub_encoder;
2416
extern AVCodec dvdsub_decoder;
2417
extern AVCodec dvdsub_encoder;
2418

    
2419
/* resample.c */
2420

    
2421
struct ReSampleContext;
2422
struct AVResampleContext;
2423

    
2424
typedef struct ReSampleContext ReSampleContext;
2425

    
2426
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2427
                                     int output_rate, int input_rate);
2428
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2429
void audio_resample_close(ReSampleContext *s);
2430

    
2431
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2432
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2433
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2434
void av_resample_close(struct AVResampleContext *c);
2435

    
2436
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2437
/* YUV420 format is assumed ! */
2438

    
2439
struct ImgReSampleContext attribute_deprecated;
2440

    
2441
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2442

    
2443
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2444
                                      int input_width, int input_height);
2445

    
2446
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2447
                                      int iwidth, int iheight,
2448
                                      int topBand, int bottomBand,
2449
                                      int leftBand, int rightBand,
2450
                                      int padtop, int padbottom,
2451
                                      int padleft, int padright);
2452

    
2453

    
2454
attribute_deprecated void img_resample(ImgReSampleContext *s,
2455
                  AVPicture *output, const AVPicture *input);
2456

    
2457
attribute_deprecated void img_resample_close(ImgReSampleContext *s);
2458

    
2459
#endif
2460

    
2461
/**
2462
 * Allocate memory for a picture.  Call avpicture_free to free it.
2463
 *
2464
 * @param picture the picture to be filled in.
2465
 * @param pix_fmt the format of the picture.
2466
 * @param width the width of the picture.
2467
 * @param height the height of the picture.
2468
 * @return Zero if successful, a negative value if not.
2469
 */
2470
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2471

    
2472
/**
2473
 * Free a picture previously allocated by avpicture_alloc().
2474
 *
2475
 * @param picture The AVPicture to be freed.
2476
 */
2477
void avpicture_free(AVPicture *picture);
2478

    
2479
/**
2480
 * Fill in AVPicture's fields.
2481
 * The fields of the given AVPicture are filled in by using the 'ptr' address
2482
 * which points to the image data buffer. Depending on the specified picture
2483
 * format, one or multiple image data pointers and line sizes will be set.
2484
 * If a planar format is specified, several pointers will be set pointing to
2485
 * the different picture planes and the line sizes of the different planes
2486
 * will be stored in the lines_sizes array.
2487
 *
2488
 * @param picture AVPicture who's fields are to be filled in
2489
 * @param ptr Buffer which will contain or contains the actual image data
2490
 * @param pix_fmt The format in which the picture data is stored
2491
 * @param width The width of the image in pixels
2492
 * @param height The height of the image in pixels
2493
 * @return Size of the image data in bytes.
2494
 */
2495
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2496
                   int pix_fmt, int width, int height);
2497
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2498
                     unsigned char *dest, int dest_size);
2499

    
2500
/**
2501
 * Calculate the size in bytes that a picture of the given width and height
2502
 * would occupy if stored in the given picture format.
2503
 *
2504
 * @param pix_fmt The given picture format
2505
 * @param width The width of the image
2506
 * @param height The height of the image
2507
 * @return Image data size in bytes
2508
 */
2509
int avpicture_get_size(int pix_fmt, int width, int height);
2510
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2511
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2512
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2513
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2514
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2515

    
2516
#define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2517
#define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2518
#define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2519
#define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2520
#define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2521
#define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2522

    
2523
/**
2524
 * Computes what kind of losses will occur when converting from one specific
2525
 * pixel format to another.
2526
 * When converting from one pixel format to another, information loss may occur.
2527
 * For example, when converting from RGB24 to GRAY, the color information will
2528
 * be lost. Similarly, other losses occur when converting from some formats to
2529
 * other formats. These losses can involve loss of chroma, but also loss of
2530
 * resolution, loss of color depth, loss due to the color space conversion, loss
2531
 * of the alpha bits or loss due to color quantization.
2532
 * avcodec_get_fix_fmt_loss() informs you on the various types of losses which
2533
 * will occur when converting from one pixel format to another.
2534
 *
2535
 * @param[in] dst_pix_fmt Destination pixel format.
2536
 * @param[in] src_pix_fmt Source pixel format.
2537
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2538
 * @return Combination of flags informing you what kind of losses will occur.
2539
 */
2540
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2541
                             int has_alpha);
2542

    
2543
/**
2544
 * Finds the best pixel format to convert to given a certain source pixel
2545
 * format.  When converting from one pixel format to another, information loss
2546
 * may occur.  For example, when converting from RGB24 to GRAY, the color
2547
 * information will be lost. Similarly, other losses occur when converting from
2548
 * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2549
 * the given pixel formats should be used to undergo the least amount of losses.
2550
 * The pixel formats from which it choses one, are determined by the
2551
 * \p pix_fmt_mask parameter.
2552
 *
2553
 * @code
2554
 * src_pix_fmt = PIX_FMT_YUV420P;
2555
 * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2556
 * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2557
 * @endcode
2558
 *
2559
 * @param[in] pix_fmt_mask Bitmask determining which pixel format to choose from.
2560
 * @param[in] src_pix_fmt Source pixel format.
2561
 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2562
 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2563
 * @return The best pixel format to convert to or -1 if none was found.
2564
 */
2565
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2566
                              int has_alpha, int *loss_ptr);
2567

    
2568
#define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2569
#define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2570

    
2571
/**
2572
 * Tell if an image really has transparent alpha values.
2573
 * @return ored mask of FF_ALPHA_xxx constants
2574
 */
2575
int img_get_alpha_info(const AVPicture *src,
2576
                       int pix_fmt, int width, int height);
2577

    
2578
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2579
/* convert among pixel formats */
2580
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2581
                const AVPicture *src, int pix_fmt,
2582
                int width, int height);
2583
#endif
2584

    
2585
/* deinterlace a picture */
2586
/* deinterlace - if not supported return -1 */
2587
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2588
                          int pix_fmt, int width, int height);
2589

    
2590
/* external high level API */
2591

    
2592
extern AVCodec *first_avcodec;
2593

    
2594
/* returns LIBAVCODEC_VERSION_INT constant */
2595
unsigned avcodec_version(void);
2596
/* returns LIBAVCODEC_BUILD constant */
2597
unsigned avcodec_build(void);
2598

    
2599
/**
2600
 * Initializes libavcodec.
2601
 *
2602
 * @warning This function \e must be called before any other libavcodec
2603
 * function.
2604
 */
2605
void avcodec_init(void);
2606

    
2607
void register_avcodec(AVCodec *format);
2608

    
2609
/**
2610
 * Finds an encoder with a matching codec ID.
2611
 *
2612
 * @param id CodecID of the requested encoder.
2613
 * @return An encoder if one was found, NULL otherwise.
2614
 */
2615
AVCodec *avcodec_find_encoder(enum CodecID id);
2616

    
2617
/**
2618
 * Finds an encoder with the specified name.
2619
 *
2620
 * @param name Name of the requested encoder.
2621
 * @return An encoder if one was found, NULL otherwise.
2622
 */
2623
AVCodec *avcodec_find_encoder_by_name(const char *name);
2624

    
2625
/**
2626
 * Finds a decoder with a matching codec ID.
2627
 *
2628
 * @param id CodecID of the requested decoder.
2629
 * @return A decoder if one was found, NULL otherwise.
2630
 */
2631
AVCodec *avcodec_find_decoder(enum CodecID id);
2632

    
2633
/**
2634
 * Finds an decoder with the specified name.
2635
 *
2636
 * @param name Name of the requested decoder.
2637
 * @return A decoder if one was found, NULL otherwise.
2638
 */
2639
AVCodec *avcodec_find_decoder_by_name(const char *name);
2640
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2641

    
2642
/**
2643
 * Sets the fields of the given AVCodecContext to default values.
2644
 *
2645
 * @param s The AVCodecContext of which the fields should be set to default values.
2646
 */
2647
void avcodec_get_context_defaults(AVCodecContext *s);
2648

    
2649
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2650
 *  we WILL change its arguments and name a few times! */
2651
void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2652

    
2653
/**
2654
 * Allocates an AVCodecContext and sets its fields to default values.  The
2655
 * resulting struct can be deallocated by simply calling av_free().
2656
 *
2657
 * @return An AVCodecContext filled with default values or NULL on failure.
2658
 * @see avcodec_get_context_defaults
2659
 */
2660
AVCodecContext *avcodec_alloc_context(void);
2661

    
2662
/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2663
 *  we WILL change its arguments and name a few times! */
2664
AVCodecContext *avcodec_alloc_context2(enum CodecType);
2665

    
2666
/**
2667
 * Sets the fields of the given AVFrame to default values.
2668
 *
2669
 * @param pic The AVFrame of which the fields should be set to default values.
2670
 */
2671
void avcodec_get_frame_defaults(AVFrame *pic);
2672

    
2673
/**
2674
 * Allocates an AVFrame and sets its fields to default values.  The resulting
2675
 * struct can be deallocated by simply calling av_free().
2676
 *
2677
 * @return An AVFrame filled with default values or NULL on failure.
2678
 * @see avcodec_get_frame_defaults
2679
 */
2680
AVFrame *avcodec_alloc_frame(void);
2681

    
2682
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2683
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2684
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2685
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2686

    
2687
/**
2688
 * Checks if the given dimension of a picture is valid, meaning that all
2689
 * bytes of the picture can be addressed with a signed int.
2690
 *
2691
 * @param[in] w Width of the picture.
2692
 * @param[in] h Height of the picture.
2693
 * @return Zero if valid, a negative value if invalid.
2694
 */
2695
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2696
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2697

    
2698
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2699
void avcodec_thread_free(AVCodecContext *s);
2700
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2701
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2702
//FIXME func typedef
2703

    
2704
/**
2705
 * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2706
 * function the context has to be allocated.
2707
 *
2708
 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2709
 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2710
 * retrieving a codec.
2711
 *
2712
 * @warning This function is not thread save!
2713
 *
2714
 * @code
2715
 * codec = avcodec_find_decoder(CODEC_ID_H264);
2716
 * if (!codec)
2717
 *     exit(1);
2718
 *
2719
 * context = avcodec_alloc_context();
2720
 *
2721
 * if (avcodec_open(context, codec) < 0)
2722
 *     exit(1);
2723
 * @endcode
2724
 *
2725
 * @param avctx The context which will be setup to use the given codec.
2726
 * @param codec The codec to use within the context.
2727
 * @return Zero on success, a negative value on error.
2728
 * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2729
 */
2730
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2731

    
2732
/**
2733
 * @deprecated Use avcodec_decode_audio2() instead.
2734
 */
2735
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2736
                         int *frame_size_ptr,
2737
                         uint8_t *buf, int buf_size);
2738

    
2739
/**
2740
 * Decodes an audio frame from \p buf into \p samples.
2741
 * The avcodec_decode_audio2() function decodes a frame of audio from the input
2742
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2743
 * audiocodec which was coupled with \p avctx using avcodec_open(). The
2744
 * resulting decoded frame is stored in output buffer \p samples.  If no frame
2745
 * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2746
 * decompressed frame size in \e bytes.
2747
 *
2748
 * @warning You \e must set \p frame_size_ptr to the allocated size of the
2749
 * output buffer before calling avcodec_decode_audio2().
2750
 *
2751
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2752
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2753
 * bits at once and could read over the end.
2754
 *
2755
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2756
 * no overreading happens for damaged MPEG streams.
2757
 *
2758
 * @note You might have to align the input buffer \p buf and output buffer \p
2759
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2760
 * necessary at all, on others it won't work at all if not aligned and on others
2761
 * it will work but it will have an impact on performance. In practice, the
2762
 * bitstream should have 4 byte alignment at minimum and all sample data should
2763
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2764
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2765
 * start of the buffer to 16.
2766
 *
2767
 * @param avctx The codec context.
2768
 * @param[out] samples The output buffer.
2769
 * @param[in,out] frame_size_ptr The output buffer size in bytes.
2770
 * @param[in] buf The input buffer.
2771
 * @param[in] buf_size The input buffer size in bytes.
2772
 * @return On error a negative value is returned, otherwise the number of bytes
2773
 * used or zero if no frame could be decompressed.
2774
 */
2775
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2776
                         int *frame_size_ptr,
2777
                         uint8_t *buf, int buf_size);
2778

    
2779
/**
2780
 * Decodes a video frame from \p buf into \p picture.
2781
 * The avcodec_decode_video() function decodes a frame of video from the input
2782
 * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2783
 * videocodec which was coupled with \p avctx using avcodec_open(). The
2784
 * resulting decoded frame is stored in \p picture.
2785
 *
2786
 * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2787
 * the actual read bytes because some optimized bitstream readers read 32 or 64
2788
 * bits at once and could read over the end.
2789
 *
2790
 * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2791
 * no overreading happens for damaged MPEG streams.
2792
 *
2793
 * @note You might have to align the input buffer \p buf and output buffer \p
2794
 * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2795
 * necessary at all, on others it won't work at all if not aligned and on others
2796
 * it will work but it will have an impact on performance. In practice, the
2797
 * bitstream should have 4 byte alignment at minimum and all sample data should
2798
 * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2799
 * the linesize is not a multiple of 16 then there's no sense in aligning the
2800
 * start of the buffer to 16.
2801
 *
2802
 * @param avctx The codec context.
2803
 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2804
 * @param[in] buf The input buffer.
2805
 * @param[in] buf_size The size of the input buffer in bytes.
2806
 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is non zero.
2807
 * @return On error a negative value is returned, otherwise the number of bytes
2808
 * used or zero if no frame could be decompressed.
2809
 */
2810
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2811
                         int *got_picture_ptr,
2812
                         uint8_t *buf, int buf_size);
2813

    
2814
/* decode a subtitle message. return -1 if error, otherwise return the
2815
   *number of bytes used. If no subtitle could be decompressed,
2816
   *got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2817
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2818
                            int *got_sub_ptr,
2819
                            const uint8_t *buf, int buf_size);
2820
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2821
                        int *data_size_ptr,
2822
                        uint8_t *buf, int buf_size);
2823

    
2824
/**
2825
 * Encodes an audio frame from \p samples into \p buf.
2826
 * The avcodec_encode_audio() function encodes a frame of audio from the input
2827
 * buffer \p samples. To encode it, it makes use of the audiocodec which was
2828
 * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2829
 * stored in output buffer \p buf.
2830
 *
2831
 * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2832
 *
2833
 * @param avctx The codec context.
2834
 * @param[out] buf The output buffer.
2835
 * @param[in] buf_size The output buffer size.
2836
 * @param[in] samples The input buffer containing the samples.
2837
 * @return On error a negative value is returned, on succes zero or the number
2838
 * of bytes used from the input buffer.
2839
 */
2840
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2841
                         const short *samples);
2842

    
2843
/**
2844
 * Encodes a video frame from \p pict into \p buf.
2845
 * The avcodec_encode_video() function encodes a frame of video from the input
2846
 * \p pict. To encode it, it makes use of the videocodec which was coupled with
2847
 * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2848
 * frame are stored in the output buffer \p buf. The input picture should be
2849
 * stored using a specific format, namely \c avctx.pix_fmt.
2850
 *
2851
 * @param avctx The codec context.
2852
 * @param[out] buf The output buffer for the bitstream of encoded frame.
2853
 * @param[in] buf_size The size of the outputbuffer in bytes.
2854
 * @param[in] pict The input picture to encode.
2855
 * @return On error a negative value is returned, on success zero or the number
2856
 * of bytes used from the input buffer.
2857
 */
2858
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2859
                         const AVFrame *pict);
2860
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2861
                            const AVSubtitle *sub);
2862

    
2863
int avcodec_close(AVCodecContext *avctx);
2864

    
2865
void avcodec_register_all(void);
2866

    
2867
/**
2868
 * Flush buffers, should be called when seeking or when switching to a different stream.
2869
 */
2870
void avcodec_flush_buffers(AVCodecContext *avctx);
2871

    
2872
void avcodec_default_free_buffers(AVCodecContext *s);
2873

    
2874
/* misc useful functions */
2875

    
2876
/**
2877
 * Returns a single letter to describe the given picture type \p pict_type.
2878
 *
2879
 * @param[in] pict_type The picture type.
2880
 * @return A single character representing the picture type.
2881
 */
2882
char av_get_pict_type_char(int pict_type);
2883

    
2884
/**
2885
 * Returns codec bits per sample.
2886
 *
2887
 * @param[in] codec_id The codec.
2888
 * @return Number of bits per sample or zero if unknown for the given codec.
2889
 */
2890
int av_get_bits_per_sample(enum CodecID codec_id);
2891

    
2892
/* frame parsing */
2893
typedef struct AVCodecParserContext {
2894
    void *priv_data;
2895
    struct AVCodecParser *parser;
2896
    int64_t frame_offset; /* offset of the current frame */
2897
    int64_t cur_offset; /* current offset
2898
                           (incremented by each av_parser_parse()) */
2899
    int64_t last_frame_offset; /* offset of the last frame */
2900
    /* video info */
2901
    int pict_type; /* XXX: put it back in AVCodecContext */
2902
    int repeat_pict; /* XXX: put it back in AVCodecContext */
2903
    int64_t pts;     /* pts of the current frame */
2904
    int64_t dts;     /* dts of the current frame */
2905

    
2906
    /* private data */
2907
    int64_t last_pts;
2908
    int64_t last_dts;
2909
    int fetch_timestamp;
2910

    
2911
#define AV_PARSER_PTS_NB 4
2912
    int cur_frame_start_index;
2913
    int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2914
    int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2915
    int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2916

    
2917
    int flags;
2918
#define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2919
} AVCodecParserContext;
2920

    
2921
typedef struct AVCodecParser {
2922
    int codec_ids[5]; /* several codec IDs are permitted */
2923
    int priv_data_size;
2924
    int (*parser_init)(AVCodecParserContext *s);
2925
    int (*parser_parse)(AVCodecParserContext *s,
2926
                        AVCodecContext *avctx,
2927
                        uint8_t **poutbuf, int *poutbuf_size,
2928
                        const uint8_t *buf, int buf_size);
2929
    void (*parser_close)(AVCodecParserContext *s);
2930
    int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2931
    struct AVCodecParser *next;
2932
} AVCodecParser;
2933

    
2934
extern AVCodecParser *av_first_parser;
2935

    
2936
void av_register_codec_parser(AVCodecParser *parser);
2937
AVCodecParserContext *av_parser_init(int codec_id);
2938
int av_parser_parse(AVCodecParserContext *s,
2939
                    AVCodecContext *avctx,
2940
                    uint8_t **poutbuf, int *poutbuf_size,
2941
                    const uint8_t *buf, int buf_size,
2942
                    int64_t pts, int64_t dts);
2943
int av_parser_change(AVCodecParserContext *s,
2944
                     AVCodecContext *avctx,
2945
                     uint8_t **poutbuf, int *poutbuf_size,
2946
                     const uint8_t *buf, int buf_size, int keyframe);
2947
void av_parser_close(AVCodecParserContext *s);
2948

    
2949
extern AVCodecParser aac_parser;
2950
extern AVCodecParser ac3_parser;
2951
extern AVCodecParser cavsvideo_parser;
2952
extern AVCodecParser dca_parser;
2953
extern AVCodecParser dvbsub_parser;
2954
extern AVCodecParser dvdsub_parser;
2955
extern AVCodecParser h261_parser;
2956
extern AVCodecParser h263_parser;
2957
extern AVCodecParser h264_parser;
2958
extern AVCodecParser mjpeg_parser;
2959
extern AVCodecParser mpeg4video_parser;
2960
extern AVCodecParser mpegaudio_parser;
2961
extern AVCodecParser mpegvideo_parser;
2962
extern AVCodecParser pnm_parser;
2963
extern AVCodecParser vc1_parser;
2964

    
2965

    
2966
typedef struct AVBitStreamFilterContext {
2967
    void *priv_data;
2968
    struct AVBitStreamFilter *filter;
2969
    AVCodecParserContext *parser;
2970
    struct AVBitStreamFilterContext *next;
2971
} AVBitStreamFilterContext;
2972

    
2973

    
2974
typedef struct AVBitStreamFilter {
2975
    const char *name;
2976
    int priv_data_size;
2977
    int (*filter)(AVBitStreamFilterContext *bsfc,
2978
                  AVCodecContext *avctx, const char *args,
2979
                  uint8_t **poutbuf, int *poutbuf_size,
2980
                  const uint8_t *buf, int buf_size, int keyframe);
2981
    struct AVBitStreamFilter *next;
2982
} AVBitStreamFilter;
2983

    
2984
extern AVBitStreamFilter *av_first_bitstream_filter;
2985

    
2986
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2987
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2988
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2989
                               AVCodecContext *avctx, const char *args,
2990
                               uint8_t **poutbuf, int *poutbuf_size,
2991
                               const uint8_t *buf, int buf_size, int keyframe);
2992
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2993

    
2994
extern AVBitStreamFilter dump_extradata_bsf;
2995
extern AVBitStreamFilter remove_extradata_bsf;
2996
extern AVBitStreamFilter noise_bsf;
2997
extern AVBitStreamFilter mp3_header_compress_bsf;
2998
extern AVBitStreamFilter mp3_header_decompress_bsf;
2999
extern AVBitStreamFilter mjpega_dump_header_bsf;
3000
extern AVBitStreamFilter imx_dump_header_bsf;
3001

    
3002

    
3003
/* memory */
3004

    
3005
/**
3006
 * Reallocates the given block if it is not large enough, otherwise it
3007
 * does nothing.
3008
 *
3009
 * @see av_realloc
3010
 */
3011
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
3012

    
3013
/* for static data only */
3014

    
3015
/**
3016
 * Frees all static arrays and reset their pointers to 0.
3017
 * Call this function to release all statically allocated tables.
3018
 */
3019
attribute_deprecated void av_free_static(void);
3020

    
3021
/**
3022
 * Allocation of static arrays.
3023
 *
3024
 * @warning Do not use for normal allocation.
3025
 *
3026
 * @param[in] size The amount of memory you need in bytes.
3027
 * @return Block of memory of the requested size.
3028
 */
3029
attribute_deprecated void *av_mallocz_static(unsigned int size);
3030

    
3031
/**
3032
 * Copy image 'src' to 'dst'.
3033
 */
3034
void av_picture_copy(AVPicture *dst, const AVPicture *src,
3035
              int pix_fmt, int width, int height);
3036

    
3037
/**
3038
 * Crop image top and left side
3039
 */
3040
int av_picture_crop(AVPicture *dst, const AVPicture *src,
3041
             int pix_fmt, int top_band, int left_band);
3042

    
3043
/**
3044
 * Pad image
3045
 */
3046
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3047
            int padtop, int padbottom, int padleft, int padright, int *color);
3048

    
3049
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
3050
attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
3051
              int pix_fmt, int width, int height);
3052

    
3053
attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
3054
             int pix_fmt, int top_band, int left_band);
3055

    
3056
attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3057
            int padtop, int padbottom, int padleft, int padright, int *color);
3058
#endif
3059

    
3060
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3061

    
3062
/* error handling */
3063
#if EINVAL > 0
3064
#define AVERROR(e) (-(e)) /**< returns a negative error code from a POSIX error code, to return from library functions. */
3065
#define AVUNERROR(e) (-(e)) /**< returns a POSIX error code from a library function error return value. */
3066
#else
3067
/* some platforms have E* and errno already negated. */
3068
#define AVERROR(e) (e)
3069
#define AVUNERROR(e) (e)
3070
#endif
3071
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3072
#define AVERROR_IO          AVERROR(EIO)     /**< i/o error */
3073
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< number syntax expected in filename */
3074
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3075
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3076
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3077
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< operation not supported */
3078

    
3079
#ifdef __cplusplus
3080
}
3081
#endif
3082

    
3083
#endif /* AVCODEC_H */