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https://github.com/FFmpeg/FFmpeg.git
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4205 lines
139 KiB
C
4205 lines
139 KiB
C
/*
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* copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_AVCODEC_H
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#define AVCODEC_AVCODEC_H
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/**
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* @file
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* @ingroup libavc
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* Libavcodec external API header
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*/
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#include <errno.h>
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#include "libavutil/samplefmt.h"
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#include "libavutil/attributes.h"
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#include "libavutil/avutil.h"
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#include "libavutil/buffer.h"
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#include "libavutil/cpu.h"
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#include "libavutil/dict.h"
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#include "libavutil/frame.h"
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#include "libavutil/log.h"
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#include "libavutil/pixfmt.h"
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#include "libavutil/rational.h"
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#include "libavcodec/version.h"
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/**
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* @defgroup libavc Encoding/Decoding Library
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* @{
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*
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* @defgroup lavc_decoding Decoding
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* @{
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* @}
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*
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* @defgroup lavc_encoding Encoding
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* @{
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* @}
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*
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* @defgroup lavc_codec Codecs
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* @{
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* @defgroup lavc_codec_native Native Codecs
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* @{
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* @}
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* @defgroup lavc_codec_wrappers External library wrappers
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* @{
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* @}
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* @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
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* @{
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* @}
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* @}
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* @defgroup lavc_internal Internal
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* @{
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* @}
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* @}
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*
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*/
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/**
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* @defgroup lavc_core Core functions/structures.
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* @ingroup libavc
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*
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* Basic definitions, functions for querying libavcodec capabilities,
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* allocating core structures, etc.
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* @{
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*/
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/**
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* Identify the syntax and semantics of the bitstream.
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* The principle is roughly:
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* Two decoders with the same ID can decode the same streams.
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* Two encoders with the same ID can encode compatible streams.
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* There may be slight deviations from the principle due to implementation
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* details.
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*
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* If you add a codec ID to this list, add it so that
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* 1. no value of a existing codec ID changes (that would break ABI),
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* 2. it is as close as possible to similar codecs.
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*
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* After adding new codec IDs, do not forget to add an entry to the codec
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* descriptor list and bump libavcodec minor version.
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*/
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enum AVCodecID {
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AV_CODEC_ID_NONE,
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/* video codecs */
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AV_CODEC_ID_MPEG1VIDEO,
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AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
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AV_CODEC_ID_MPEG2VIDEO_XVMC,
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AV_CODEC_ID_H261,
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AV_CODEC_ID_H263,
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AV_CODEC_ID_RV10,
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AV_CODEC_ID_RV20,
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AV_CODEC_ID_MJPEG,
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AV_CODEC_ID_MJPEGB,
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AV_CODEC_ID_LJPEG,
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AV_CODEC_ID_SP5X,
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AV_CODEC_ID_JPEGLS,
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AV_CODEC_ID_MPEG4,
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AV_CODEC_ID_RAWVIDEO,
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AV_CODEC_ID_MSMPEG4V1,
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AV_CODEC_ID_MSMPEG4V2,
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AV_CODEC_ID_MSMPEG4V3,
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AV_CODEC_ID_WMV1,
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AV_CODEC_ID_WMV2,
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AV_CODEC_ID_H263P,
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AV_CODEC_ID_H263I,
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AV_CODEC_ID_FLV1,
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AV_CODEC_ID_SVQ1,
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AV_CODEC_ID_SVQ3,
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AV_CODEC_ID_DVVIDEO,
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AV_CODEC_ID_HUFFYUV,
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AV_CODEC_ID_CYUV,
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AV_CODEC_ID_H264,
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AV_CODEC_ID_INDEO3,
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AV_CODEC_ID_VP3,
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AV_CODEC_ID_THEORA,
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AV_CODEC_ID_ASV1,
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AV_CODEC_ID_ASV2,
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AV_CODEC_ID_FFV1,
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AV_CODEC_ID_4XM,
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AV_CODEC_ID_VCR1,
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AV_CODEC_ID_CLJR,
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AV_CODEC_ID_MDEC,
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AV_CODEC_ID_ROQ,
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AV_CODEC_ID_INTERPLAY_VIDEO,
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AV_CODEC_ID_XAN_WC3,
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AV_CODEC_ID_XAN_WC4,
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AV_CODEC_ID_RPZA,
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AV_CODEC_ID_CINEPAK,
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AV_CODEC_ID_WS_VQA,
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AV_CODEC_ID_MSRLE,
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AV_CODEC_ID_MSVIDEO1,
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AV_CODEC_ID_IDCIN,
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AV_CODEC_ID_8BPS,
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AV_CODEC_ID_SMC,
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AV_CODEC_ID_FLIC,
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AV_CODEC_ID_TRUEMOTION1,
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AV_CODEC_ID_VMDVIDEO,
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AV_CODEC_ID_MSZH,
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AV_CODEC_ID_ZLIB,
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AV_CODEC_ID_QTRLE,
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AV_CODEC_ID_TSCC,
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AV_CODEC_ID_ULTI,
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AV_CODEC_ID_QDRAW,
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AV_CODEC_ID_VIXL,
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AV_CODEC_ID_QPEG,
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AV_CODEC_ID_PNG,
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AV_CODEC_ID_PPM,
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AV_CODEC_ID_PBM,
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AV_CODEC_ID_PGM,
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AV_CODEC_ID_PGMYUV,
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AV_CODEC_ID_PAM,
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AV_CODEC_ID_FFVHUFF,
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AV_CODEC_ID_RV30,
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AV_CODEC_ID_RV40,
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AV_CODEC_ID_VC1,
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AV_CODEC_ID_WMV3,
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AV_CODEC_ID_LOCO,
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AV_CODEC_ID_WNV1,
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AV_CODEC_ID_AASC,
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AV_CODEC_ID_INDEO2,
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AV_CODEC_ID_FRAPS,
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AV_CODEC_ID_TRUEMOTION2,
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AV_CODEC_ID_BMP,
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AV_CODEC_ID_CSCD,
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AV_CODEC_ID_MMVIDEO,
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AV_CODEC_ID_ZMBV,
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AV_CODEC_ID_AVS,
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AV_CODEC_ID_SMACKVIDEO,
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AV_CODEC_ID_NUV,
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AV_CODEC_ID_KMVC,
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AV_CODEC_ID_FLASHSV,
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AV_CODEC_ID_CAVS,
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AV_CODEC_ID_JPEG2000,
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AV_CODEC_ID_VMNC,
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AV_CODEC_ID_VP5,
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AV_CODEC_ID_VP6,
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AV_CODEC_ID_VP6F,
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AV_CODEC_ID_TARGA,
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AV_CODEC_ID_DSICINVIDEO,
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AV_CODEC_ID_TIERTEXSEQVIDEO,
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AV_CODEC_ID_TIFF,
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AV_CODEC_ID_GIF,
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AV_CODEC_ID_DXA,
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AV_CODEC_ID_DNXHD,
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AV_CODEC_ID_THP,
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AV_CODEC_ID_SGI,
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AV_CODEC_ID_C93,
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AV_CODEC_ID_BETHSOFTVID,
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AV_CODEC_ID_PTX,
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AV_CODEC_ID_TXD,
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AV_CODEC_ID_VP6A,
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AV_CODEC_ID_AMV,
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AV_CODEC_ID_VB,
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AV_CODEC_ID_PCX,
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AV_CODEC_ID_SUNRAST,
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AV_CODEC_ID_INDEO4,
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AV_CODEC_ID_INDEO5,
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AV_CODEC_ID_MIMIC,
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AV_CODEC_ID_RL2,
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AV_CODEC_ID_ESCAPE124,
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AV_CODEC_ID_DIRAC,
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AV_CODEC_ID_BFI,
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AV_CODEC_ID_CMV,
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AV_CODEC_ID_MOTIONPIXELS,
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AV_CODEC_ID_TGV,
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AV_CODEC_ID_TGQ,
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AV_CODEC_ID_TQI,
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AV_CODEC_ID_AURA,
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AV_CODEC_ID_AURA2,
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AV_CODEC_ID_V210X,
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AV_CODEC_ID_TMV,
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AV_CODEC_ID_V210,
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AV_CODEC_ID_DPX,
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AV_CODEC_ID_MAD,
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AV_CODEC_ID_FRWU,
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AV_CODEC_ID_FLASHSV2,
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AV_CODEC_ID_CDGRAPHICS,
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AV_CODEC_ID_R210,
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AV_CODEC_ID_ANM,
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AV_CODEC_ID_BINKVIDEO,
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AV_CODEC_ID_IFF_ILBM,
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AV_CODEC_ID_IFF_BYTERUN1,
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AV_CODEC_ID_KGV1,
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AV_CODEC_ID_YOP,
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AV_CODEC_ID_VP8,
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AV_CODEC_ID_PICTOR,
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AV_CODEC_ID_ANSI,
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AV_CODEC_ID_A64_MULTI,
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AV_CODEC_ID_A64_MULTI5,
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AV_CODEC_ID_R10K,
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AV_CODEC_ID_MXPEG,
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AV_CODEC_ID_LAGARITH,
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AV_CODEC_ID_PRORES,
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AV_CODEC_ID_JV,
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AV_CODEC_ID_DFA,
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AV_CODEC_ID_WMV3IMAGE,
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AV_CODEC_ID_VC1IMAGE,
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AV_CODEC_ID_UTVIDEO,
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AV_CODEC_ID_BMV_VIDEO,
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AV_CODEC_ID_VBLE,
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AV_CODEC_ID_DXTORY,
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AV_CODEC_ID_V410,
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AV_CODEC_ID_XWD,
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AV_CODEC_ID_CDXL,
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AV_CODEC_ID_XBM,
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AV_CODEC_ID_ZEROCODEC,
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AV_CODEC_ID_MSS1,
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AV_CODEC_ID_MSA1,
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AV_CODEC_ID_TSCC2,
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AV_CODEC_ID_MTS2,
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AV_CODEC_ID_CLLC,
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AV_CODEC_ID_MSS2,
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AV_CODEC_ID_VP9,
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AV_CODEC_ID_AIC,
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AV_CODEC_ID_ESCAPE130,
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AV_CODEC_ID_G2M,
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/* various PCM "codecs" */
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AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
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AV_CODEC_ID_PCM_S16LE = 0x10000,
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AV_CODEC_ID_PCM_S16BE,
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AV_CODEC_ID_PCM_U16LE,
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AV_CODEC_ID_PCM_U16BE,
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AV_CODEC_ID_PCM_S8,
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AV_CODEC_ID_PCM_U8,
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AV_CODEC_ID_PCM_MULAW,
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AV_CODEC_ID_PCM_ALAW,
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AV_CODEC_ID_PCM_S32LE,
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AV_CODEC_ID_PCM_S32BE,
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AV_CODEC_ID_PCM_U32LE,
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AV_CODEC_ID_PCM_U32BE,
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AV_CODEC_ID_PCM_S24LE,
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AV_CODEC_ID_PCM_S24BE,
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AV_CODEC_ID_PCM_U24LE,
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AV_CODEC_ID_PCM_U24BE,
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AV_CODEC_ID_PCM_S24DAUD,
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AV_CODEC_ID_PCM_ZORK,
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AV_CODEC_ID_PCM_S16LE_PLANAR,
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AV_CODEC_ID_PCM_DVD,
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AV_CODEC_ID_PCM_F32BE,
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AV_CODEC_ID_PCM_F32LE,
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AV_CODEC_ID_PCM_F64BE,
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AV_CODEC_ID_PCM_F64LE,
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AV_CODEC_ID_PCM_BLURAY,
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AV_CODEC_ID_PCM_LXF,
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AV_CODEC_ID_S302M,
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AV_CODEC_ID_PCM_S8_PLANAR,
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/* various ADPCM codecs */
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AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
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AV_CODEC_ID_ADPCM_IMA_WAV,
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AV_CODEC_ID_ADPCM_IMA_DK3,
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AV_CODEC_ID_ADPCM_IMA_DK4,
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AV_CODEC_ID_ADPCM_IMA_WS,
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AV_CODEC_ID_ADPCM_IMA_SMJPEG,
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AV_CODEC_ID_ADPCM_MS,
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AV_CODEC_ID_ADPCM_4XM,
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AV_CODEC_ID_ADPCM_XA,
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AV_CODEC_ID_ADPCM_ADX,
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AV_CODEC_ID_ADPCM_EA,
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AV_CODEC_ID_ADPCM_G726,
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AV_CODEC_ID_ADPCM_CT,
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AV_CODEC_ID_ADPCM_SWF,
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AV_CODEC_ID_ADPCM_YAMAHA,
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AV_CODEC_ID_ADPCM_SBPRO_4,
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AV_CODEC_ID_ADPCM_SBPRO_3,
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AV_CODEC_ID_ADPCM_SBPRO_2,
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AV_CODEC_ID_ADPCM_THP,
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AV_CODEC_ID_ADPCM_IMA_AMV,
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AV_CODEC_ID_ADPCM_EA_R1,
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AV_CODEC_ID_ADPCM_EA_R3,
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AV_CODEC_ID_ADPCM_EA_R2,
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AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
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AV_CODEC_ID_ADPCM_IMA_EA_EACS,
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AV_CODEC_ID_ADPCM_EA_XAS,
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AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
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AV_CODEC_ID_ADPCM_IMA_ISS,
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AV_CODEC_ID_ADPCM_G722,
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AV_CODEC_ID_ADPCM_IMA_APC,
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/* AMR */
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AV_CODEC_ID_AMR_NB = 0x12000,
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AV_CODEC_ID_AMR_WB,
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/* RealAudio codecs*/
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AV_CODEC_ID_RA_144 = 0x13000,
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AV_CODEC_ID_RA_288,
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/* various DPCM codecs */
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AV_CODEC_ID_ROQ_DPCM = 0x14000,
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AV_CODEC_ID_INTERPLAY_DPCM,
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AV_CODEC_ID_XAN_DPCM,
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AV_CODEC_ID_SOL_DPCM,
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/* audio codecs */
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AV_CODEC_ID_MP2 = 0x15000,
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AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
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AV_CODEC_ID_AAC,
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AV_CODEC_ID_AC3,
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AV_CODEC_ID_DTS,
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AV_CODEC_ID_VORBIS,
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AV_CODEC_ID_DVAUDIO,
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AV_CODEC_ID_WMAV1,
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AV_CODEC_ID_WMAV2,
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AV_CODEC_ID_MACE3,
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AV_CODEC_ID_MACE6,
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AV_CODEC_ID_VMDAUDIO,
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AV_CODEC_ID_FLAC,
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AV_CODEC_ID_MP3ADU,
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AV_CODEC_ID_MP3ON4,
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AV_CODEC_ID_SHORTEN,
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AV_CODEC_ID_ALAC,
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AV_CODEC_ID_WESTWOOD_SND1,
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AV_CODEC_ID_GSM, ///< as in Berlin toast format
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AV_CODEC_ID_QDM2,
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AV_CODEC_ID_COOK,
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AV_CODEC_ID_TRUESPEECH,
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AV_CODEC_ID_TTA,
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AV_CODEC_ID_SMACKAUDIO,
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AV_CODEC_ID_QCELP,
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AV_CODEC_ID_WAVPACK,
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AV_CODEC_ID_DSICINAUDIO,
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AV_CODEC_ID_IMC,
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AV_CODEC_ID_MUSEPACK7,
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AV_CODEC_ID_MLP,
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AV_CODEC_ID_GSM_MS, /* as found in WAV */
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AV_CODEC_ID_ATRAC3,
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AV_CODEC_ID_VOXWARE,
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AV_CODEC_ID_APE,
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AV_CODEC_ID_NELLYMOSER,
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AV_CODEC_ID_MUSEPACK8,
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AV_CODEC_ID_SPEEX,
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AV_CODEC_ID_WMAVOICE,
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AV_CODEC_ID_WMAPRO,
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AV_CODEC_ID_WMALOSSLESS,
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AV_CODEC_ID_ATRAC3P,
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AV_CODEC_ID_EAC3,
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AV_CODEC_ID_SIPR,
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AV_CODEC_ID_MP1,
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AV_CODEC_ID_TWINVQ,
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AV_CODEC_ID_TRUEHD,
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AV_CODEC_ID_MP4ALS,
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AV_CODEC_ID_ATRAC1,
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AV_CODEC_ID_BINKAUDIO_RDFT,
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AV_CODEC_ID_BINKAUDIO_DCT,
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AV_CODEC_ID_AAC_LATM,
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AV_CODEC_ID_QDMC,
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AV_CODEC_ID_CELT,
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AV_CODEC_ID_G723_1,
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AV_CODEC_ID_G729,
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AV_CODEC_ID_8SVX_EXP,
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AV_CODEC_ID_8SVX_FIB,
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AV_CODEC_ID_BMV_AUDIO,
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AV_CODEC_ID_RALF,
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AV_CODEC_ID_IAC,
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AV_CODEC_ID_ILBC,
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AV_CODEC_ID_OPUS,
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AV_CODEC_ID_COMFORT_NOISE,
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AV_CODEC_ID_TAK,
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/* subtitle codecs */
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AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
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AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
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AV_CODEC_ID_DVB_SUBTITLE,
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AV_CODEC_ID_TEXT, ///< raw UTF-8 text
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AV_CODEC_ID_XSUB,
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AV_CODEC_ID_SSA,
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AV_CODEC_ID_MOV_TEXT,
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AV_CODEC_ID_HDMV_PGS_SUBTITLE,
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AV_CODEC_ID_DVB_TELETEXT,
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AV_CODEC_ID_SRT,
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/* other specific kind of codecs (generally used for attachments) */
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AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
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AV_CODEC_ID_TTF = 0x18000,
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AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
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AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
|
|
* stream (only used by libavformat) */
|
|
AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
|
|
* stream (only used by libavformat) */
|
|
AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
|
|
};
|
|
|
|
/**
|
|
* This struct describes the properties of a single codec described by an
|
|
* AVCodecID.
|
|
* @see avcodec_get_descriptor()
|
|
*/
|
|
typedef struct AVCodecDescriptor {
|
|
enum AVCodecID id;
|
|
enum AVMediaType type;
|
|
/**
|
|
* Name of the codec described by this descriptor. It is non-empty and
|
|
* unique for each codec descriptor. It should contain alphanumeric
|
|
* characters and '_' only.
|
|
*/
|
|
const char *name;
|
|
/**
|
|
* A more descriptive name for this codec. May be NULL.
|
|
*/
|
|
const char *long_name;
|
|
/**
|
|
* Codec properties, a combination of AV_CODEC_PROP_* flags.
|
|
*/
|
|
int props;
|
|
} AVCodecDescriptor;
|
|
|
|
/**
|
|
* Codec uses only intra compression.
|
|
* Video codecs only.
|
|
*/
|
|
#define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
|
|
/**
|
|
* Codec supports lossy compression. Audio and video codecs only.
|
|
* @note a codec may support both lossy and lossless
|
|
* compression modes
|
|
*/
|
|
#define AV_CODEC_PROP_LOSSY (1 << 1)
|
|
/**
|
|
* Codec supports lossless compression. Audio and video codecs only.
|
|
*/
|
|
#define AV_CODEC_PROP_LOSSLESS (1 << 2)
|
|
|
|
/**
|
|
* @ingroup lavc_decoding
|
|
* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
|
|
* This is mainly needed because some optimized bitstream readers read
|
|
* 32 or 64 bit at once and could read over the end.<br>
|
|
* Note: If the first 23 bits of the additional bytes are not 0, then damaged
|
|
* MPEG bitstreams could cause overread and segfault.
|
|
*/
|
|
#define FF_INPUT_BUFFER_PADDING_SIZE 8
|
|
|
|
/**
|
|
* @ingroup lavc_encoding
|
|
* minimum encoding buffer size
|
|
* Used to avoid some checks during header writing.
|
|
*/
|
|
#define FF_MIN_BUFFER_SIZE 16384
|
|
|
|
|
|
/**
|
|
* @ingroup lavc_encoding
|
|
* motion estimation type.
|
|
*/
|
|
enum Motion_Est_ID {
|
|
ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
|
|
ME_FULL,
|
|
ME_LOG,
|
|
ME_PHODS,
|
|
ME_EPZS, ///< enhanced predictive zonal search
|
|
ME_X1, ///< reserved for experiments
|
|
ME_HEX, ///< hexagon based search
|
|
ME_UMH, ///< uneven multi-hexagon search
|
|
ME_TESA, ///< transformed exhaustive search algorithm
|
|
};
|
|
|
|
/**
|
|
* @ingroup lavc_decoding
|
|
*/
|
|
enum AVDiscard{
|
|
/* We leave some space between them for extensions (drop some
|
|
* keyframes for intra-only or drop just some bidir frames). */
|
|
AVDISCARD_NONE =-16, ///< discard nothing
|
|
AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
|
|
AVDISCARD_NONREF = 8, ///< discard all non reference
|
|
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
|
|
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
|
|
AVDISCARD_ALL = 48, ///< discard all
|
|
};
|
|
|
|
enum AVColorPrimaries{
|
|
AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
|
|
AVCOL_PRI_UNSPECIFIED = 2,
|
|
AVCOL_PRI_BT470M = 4,
|
|
AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
|
|
AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
|
|
AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
|
|
AVCOL_PRI_FILM = 8,
|
|
AVCOL_PRI_NB , ///< Not part of ABI
|
|
};
|
|
|
|
enum AVColorTransferCharacteristic{
|
|
AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
|
|
AVCOL_TRC_UNSPECIFIED = 2,
|
|
AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
|
|
AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
|
|
AVCOL_TRC_SMPTE240M = 7,
|
|
AVCOL_TRC_NB , ///< Not part of ABI
|
|
};
|
|
|
|
enum AVColorSpace{
|
|
AVCOL_SPC_RGB = 0,
|
|
AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
|
|
AVCOL_SPC_UNSPECIFIED = 2,
|
|
AVCOL_SPC_FCC = 4,
|
|
AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
|
|
AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
|
|
AVCOL_SPC_SMPTE240M = 7,
|
|
AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
|
|
AVCOL_SPC_NB , ///< Not part of ABI
|
|
};
|
|
|
|
enum AVColorRange{
|
|
AVCOL_RANGE_UNSPECIFIED = 0,
|
|
AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
|
|
AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
|
|
AVCOL_RANGE_NB , ///< Not part of ABI
|
|
};
|
|
|
|
/**
|
|
* X X 3 4 X X are luma samples,
|
|
* 1 2 1-6 are possible chroma positions
|
|
* X X 5 6 X 0 is undefined/unknown position
|
|
*/
|
|
enum AVChromaLocation{
|
|
AVCHROMA_LOC_UNSPECIFIED = 0,
|
|
AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
|
|
AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
|
|
AVCHROMA_LOC_TOPLEFT = 3, ///< DV
|
|
AVCHROMA_LOC_TOP = 4,
|
|
AVCHROMA_LOC_BOTTOMLEFT = 5,
|
|
AVCHROMA_LOC_BOTTOM = 6,
|
|
AVCHROMA_LOC_NB , ///< Not part of ABI
|
|
};
|
|
|
|
enum AVAudioServiceType {
|
|
AV_AUDIO_SERVICE_TYPE_MAIN = 0,
|
|
AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
|
|
AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
|
|
AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
|
|
AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
|
|
AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
|
|
AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
|
|
AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
|
|
AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
|
|
AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
|
|
};
|
|
|
|
/**
|
|
* @ingroup lavc_encoding
|
|
*/
|
|
typedef struct RcOverride{
|
|
int start_frame;
|
|
int end_frame;
|
|
int qscale; // If this is 0 then quality_factor will be used instead.
|
|
float quality_factor;
|
|
} RcOverride;
|
|
|
|
#define FF_MAX_B_FRAMES 16
|
|
|
|
/* encoding support
|
|
These flags can be passed in AVCodecContext.flags before initialization.
|
|
Note: Not everything is supported yet.
|
|
*/
|
|
|
|
/**
|
|
* Allow decoders to produce frames with data planes that are not aligned
|
|
* to CPU requirements (e.g. due to cropping).
|
|
*/
|
|
#define CODEC_FLAG_UNALIGNED 0x0001
|
|
#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
|
|
#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
|
|
#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
|
|
#define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
|
|
#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
|
|
/**
|
|
* The parent program guarantees that the input for B-frames containing
|
|
* streams is not written to for at least s->max_b_frames+1 frames, if
|
|
* this is not set the input will be copied.
|
|
*/
|
|
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
|
|
#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
|
|
#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
|
|
#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
|
|
#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
|
|
#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
|
|
#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
|
|
location instead of only at frame boundaries. */
|
|
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
|
|
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
|
|
#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
|
|
#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
|
|
#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
|
|
/* Fx : Flag for h263+ extra options */
|
|
#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
|
|
#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
|
|
#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
|
|
#define CODEC_FLAG_CLOSED_GOP 0x80000000
|
|
#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
|
|
#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
|
|
#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
|
|
#define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
|
|
|
|
#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
|
|
|
|
/* Unsupported options :
|
|
* Syntax Arithmetic coding (SAC)
|
|
* Reference Picture Selection
|
|
* Independent Segment Decoding */
|
|
/* /Fx */
|
|
/* codec capabilities */
|
|
|
|
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
|
|
/**
|
|
* Codec uses get_buffer() for allocating buffers and supports custom allocators.
|
|
* If not set, it might not use get_buffer() at all or use operations that
|
|
* assume the buffer was allocated by avcodec_default_get_buffer.
|
|
*/
|
|
#define CODEC_CAP_DR1 0x0002
|
|
#define CODEC_CAP_TRUNCATED 0x0008
|
|
/* Codec can export data for HW decoding (XvMC). */
|
|
#define CODEC_CAP_HWACCEL 0x0010
|
|
/**
|
|
* Encoder or decoder requires flushing with NULL input at the end in order to
|
|
* give the complete and correct output.
|
|
*
|
|
* NOTE: If this flag is not set, the codec is guaranteed to never be fed with
|
|
* with NULL data. The user can still send NULL data to the public encode
|
|
* or decode function, but libavcodec will not pass it along to the codec
|
|
* unless this flag is set.
|
|
*
|
|
* Decoders:
|
|
* The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
|
|
* avpkt->size=0 at the end to get the delayed data until the decoder no longer
|
|
* returns frames.
|
|
*
|
|
* Encoders:
|
|
* The encoder needs to be fed with NULL data at the end of encoding until the
|
|
* encoder no longer returns data.
|
|
*
|
|
* NOTE: For encoders implementing the AVCodec.encode2() function, setting this
|
|
* flag also means that the encoder must set the pts and duration for
|
|
* each output packet. If this flag is not set, the pts and duration will
|
|
* be determined by libavcodec from the input frame.
|
|
*/
|
|
#define CODEC_CAP_DELAY 0x0020
|
|
/**
|
|
* Codec can be fed a final frame with a smaller size.
|
|
* This can be used to prevent truncation of the last audio samples.
|
|
*/
|
|
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
|
|
/**
|
|
* Codec can export data for HW decoding (VDPAU).
|
|
*/
|
|
#define CODEC_CAP_HWACCEL_VDPAU 0x0080
|
|
/**
|
|
* Codec can output multiple frames per AVPacket
|
|
* Normally demuxers return one frame at a time, demuxers which do not do
|
|
* are connected to a parser to split what they return into proper frames.
|
|
* This flag is reserved to the very rare category of codecs which have a
|
|
* bitstream that cannot be split into frames without timeconsuming
|
|
* operations like full decoding. Demuxers carring such bitstreams thus
|
|
* may return multiple frames in a packet. This has many disadvantages like
|
|
* prohibiting stream copy in many cases thus it should only be considered
|
|
* as a last resort.
|
|
*/
|
|
#define CODEC_CAP_SUBFRAMES 0x0100
|
|
/**
|
|
* Codec is experimental and is thus avoided in favor of non experimental
|
|
* encoders
|
|
*/
|
|
#define CODEC_CAP_EXPERIMENTAL 0x0200
|
|
/**
|
|
* Codec should fill in channel configuration and samplerate instead of container
|
|
*/
|
|
#define CODEC_CAP_CHANNEL_CONF 0x0400
|
|
/**
|
|
* Codec is able to deal with negative linesizes
|
|
*/
|
|
#define CODEC_CAP_NEG_LINESIZES 0x0800
|
|
/**
|
|
* Codec supports frame-level multithreading.
|
|
*/
|
|
#define CODEC_CAP_FRAME_THREADS 0x1000
|
|
/**
|
|
* Codec supports slice-based (or partition-based) multithreading.
|
|
*/
|
|
#define CODEC_CAP_SLICE_THREADS 0x2000
|
|
/**
|
|
* Codec supports changed parameters at any point.
|
|
*/
|
|
#define CODEC_CAP_PARAM_CHANGE 0x4000
|
|
/**
|
|
* Codec supports avctx->thread_count == 0 (auto).
|
|
*/
|
|
#define CODEC_CAP_AUTO_THREADS 0x8000
|
|
/**
|
|
* Audio encoder supports receiving a different number of samples in each call.
|
|
*/
|
|
#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
|
|
|
|
//The following defines may change, don't expect compatibility if you use them.
|
|
#define MB_TYPE_INTRA4x4 0x0001
|
|
#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
|
|
#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
|
|
#define MB_TYPE_16x16 0x0008
|
|
#define MB_TYPE_16x8 0x0010
|
|
#define MB_TYPE_8x16 0x0020
|
|
#define MB_TYPE_8x8 0x0040
|
|
#define MB_TYPE_INTERLACED 0x0080
|
|
#define MB_TYPE_DIRECT2 0x0100 //FIXME
|
|
#define MB_TYPE_ACPRED 0x0200
|
|
#define MB_TYPE_GMC 0x0400
|
|
#define MB_TYPE_SKIP 0x0800
|
|
#define MB_TYPE_P0L0 0x1000
|
|
#define MB_TYPE_P1L0 0x2000
|
|
#define MB_TYPE_P0L1 0x4000
|
|
#define MB_TYPE_P1L1 0x8000
|
|
#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
|
|
#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
|
|
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
|
|
#define MB_TYPE_QUANT 0x00010000
|
|
#define MB_TYPE_CBP 0x00020000
|
|
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
|
|
|
|
/**
|
|
* Pan Scan area.
|
|
* This specifies the area which should be displayed.
|
|
* Note there may be multiple such areas for one frame.
|
|
*/
|
|
typedef struct AVPanScan{
|
|
/**
|
|
* id
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int id;
|
|
|
|
/**
|
|
* width and height in 1/16 pel
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int width;
|
|
int height;
|
|
|
|
/**
|
|
* position of the top left corner in 1/16 pel for up to 3 fields/frames
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int16_t position[3][2];
|
|
}AVPanScan;
|
|
|
|
#define FF_QSCALE_TYPE_MPEG1 0
|
|
#define FF_QSCALE_TYPE_MPEG2 1
|
|
#define FF_QSCALE_TYPE_H264 2
|
|
#define FF_QSCALE_TYPE_VP56 3
|
|
|
|
#if FF_API_GET_BUFFER
|
|
#define FF_BUFFER_TYPE_INTERNAL 1
|
|
#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
|
|
#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
|
|
#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
|
|
|
|
#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
|
|
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
|
|
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
|
|
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
|
|
#endif
|
|
|
|
/**
|
|
* The decoder will keep a reference to the frame and may reuse it later.
|
|
*/
|
|
#define AV_GET_BUFFER_FLAG_REF (1 << 0)
|
|
|
|
/**
|
|
* @defgroup lavc_packet AVPacket
|
|
*
|
|
* Types and functions for working with AVPacket.
|
|
* @{
|
|
*/
|
|
enum AVPacketSideDataType {
|
|
AV_PKT_DATA_PALETTE,
|
|
AV_PKT_DATA_NEW_EXTRADATA,
|
|
|
|
/**
|
|
* An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
|
|
* @code
|
|
* u32le param_flags
|
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
|
|
* s32le channel_count
|
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
|
|
* u64le channel_layout
|
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
|
|
* s32le sample_rate
|
|
* if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
|
|
* s32le width
|
|
* s32le height
|
|
* @endcode
|
|
*/
|
|
AV_PKT_DATA_PARAM_CHANGE,
|
|
|
|
/**
|
|
* An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
|
|
* structures with info about macroblocks relevant to splitting the
|
|
* packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
|
|
* That is, it does not necessarily contain info about all macroblocks,
|
|
* as long as the distance between macroblocks in the info is smaller
|
|
* than the target payload size.
|
|
* Each MB info structure is 12 bytes, and is laid out as follows:
|
|
* @code
|
|
* u32le bit offset from the start of the packet
|
|
* u8 current quantizer at the start of the macroblock
|
|
* u8 GOB number
|
|
* u16le macroblock address within the GOB
|
|
* u8 horizontal MV predictor
|
|
* u8 vertical MV predictor
|
|
* u8 horizontal MV predictor for block number 3
|
|
* u8 vertical MV predictor for block number 3
|
|
* @endcode
|
|
*/
|
|
AV_PKT_DATA_H263_MB_INFO,
|
|
};
|
|
|
|
/**
|
|
* This structure stores compressed data. It is typically exported by demuxers
|
|
* and then passed as input to decoders, or received as output from encoders and
|
|
* then passed to muxers.
|
|
*
|
|
* For video, it should typically contain one compressed frame. For audio it may
|
|
* contain several compressed frames.
|
|
*
|
|
* AVPacket is one of the few structs in Libav, whose size is a part of public
|
|
* ABI. Thus it may be allocated on stack and no new fields can be added to it
|
|
* without libavcodec and libavformat major bump.
|
|
*
|
|
* The semantics of data ownership depends on the buf or destruct (deprecated)
|
|
* fields. If either is set, the packet data is dynamically allocated and is
|
|
* valid indefinitely until av_free_packet() is called (which in turn calls
|
|
* av_buffer_unref()/the destruct callback to free the data). If neither is set,
|
|
* the packet data is typically backed by some static buffer somewhere and is
|
|
* only valid for a limited time (e.g. until the next read call when demuxing).
|
|
*
|
|
* The side data is always allocated with av_malloc() and is freed in
|
|
* av_free_packet().
|
|
*/
|
|
typedef struct AVPacket {
|
|
/**
|
|
* A reference to the reference-counted buffer where the packet data is
|
|
* stored.
|
|
* May be NULL, then the packet data is not reference-counted.
|
|
*/
|
|
AVBufferRef *buf;
|
|
/**
|
|
* Presentation timestamp in AVStream->time_base units; the time at which
|
|
* the decompressed packet will be presented to the user.
|
|
* Can be AV_NOPTS_VALUE if it is not stored in the file.
|
|
* pts MUST be larger or equal to dts as presentation cannot happen before
|
|
* decompression, unless one wants to view hex dumps. Some formats misuse
|
|
* the terms dts and pts/cts to mean something different. Such timestamps
|
|
* must be converted to true pts/dts before they are stored in AVPacket.
|
|
*/
|
|
int64_t pts;
|
|
/**
|
|
* Decompression timestamp in AVStream->time_base units; the time at which
|
|
* the packet is decompressed.
|
|
* Can be AV_NOPTS_VALUE if it is not stored in the file.
|
|
*/
|
|
int64_t dts;
|
|
uint8_t *data;
|
|
int size;
|
|
int stream_index;
|
|
/**
|
|
* A combination of AV_PKT_FLAG values
|
|
*/
|
|
int flags;
|
|
/**
|
|
* Additional packet data that can be provided by the container.
|
|
* Packet can contain several types of side information.
|
|
*/
|
|
struct {
|
|
uint8_t *data;
|
|
int size;
|
|
enum AVPacketSideDataType type;
|
|
} *side_data;
|
|
int side_data_elems;
|
|
|
|
/**
|
|
* Duration of this packet in AVStream->time_base units, 0 if unknown.
|
|
* Equals next_pts - this_pts in presentation order.
|
|
*/
|
|
int duration;
|
|
#if FF_API_DESTRUCT_PACKET
|
|
attribute_deprecated
|
|
void (*destruct)(struct AVPacket *);
|
|
attribute_deprecated
|
|
void *priv;
|
|
#endif
|
|
int64_t pos; ///< byte position in stream, -1 if unknown
|
|
|
|
/**
|
|
* Time difference in AVStream->time_base units from the pts of this
|
|
* packet to the point at which the output from the decoder has converged
|
|
* independent from the availability of previous frames. That is, the
|
|
* frames are virtually identical no matter if decoding started from
|
|
* the very first frame or from this keyframe.
|
|
* Is AV_NOPTS_VALUE if unknown.
|
|
* This field is not the display duration of the current packet.
|
|
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
|
|
* set.
|
|
*
|
|
* The purpose of this field is to allow seeking in streams that have no
|
|
* keyframes in the conventional sense. It corresponds to the
|
|
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
|
|
* essential for some types of subtitle streams to ensure that all
|
|
* subtitles are correctly displayed after seeking.
|
|
*/
|
|
int64_t convergence_duration;
|
|
} AVPacket;
|
|
#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
|
|
#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
|
|
|
|
enum AVSideDataParamChangeFlags {
|
|
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
|
|
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
|
|
AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
|
|
AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
|
|
};
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
struct AVCodecInternal;
|
|
|
|
enum AVFieldOrder {
|
|
AV_FIELD_UNKNOWN,
|
|
AV_FIELD_PROGRESSIVE,
|
|
AV_FIELD_TT, //< Top coded_first, top displayed first
|
|
AV_FIELD_BB, //< Bottom coded first, bottom displayed first
|
|
AV_FIELD_TB, //< Top coded first, bottom displayed first
|
|
AV_FIELD_BT, //< Bottom coded first, top displayed first
|
|
};
|
|
|
|
/**
|
|
* main external API structure.
|
|
* New fields can be added to the end with minor version bumps.
|
|
* Removal, reordering and changes to existing fields require a major
|
|
* version bump.
|
|
* sizeof(AVCodecContext) must not be used outside libav*.
|
|
*/
|
|
typedef struct AVCodecContext {
|
|
/**
|
|
* information on struct for av_log
|
|
* - set by avcodec_alloc_context3
|
|
*/
|
|
const AVClass *av_class;
|
|
int log_level_offset;
|
|
|
|
enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
|
|
const struct AVCodec *codec;
|
|
char codec_name[32];
|
|
enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
|
|
|
|
/**
|
|
* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
|
|
* This is used to work around some encoder bugs.
|
|
* A demuxer should set this to what is stored in the field used to identify the codec.
|
|
* If there are multiple such fields in a container then the demuxer should choose the one
|
|
* which maximizes the information about the used codec.
|
|
* If the codec tag field in a container is larger than 32 bits then the demuxer should
|
|
* remap the longer ID to 32 bits with a table or other structure. Alternatively a new
|
|
* extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
|
|
* first.
|
|
* - encoding: Set by user, if not then the default based on codec_id will be used.
|
|
* - decoding: Set by user, will be converted to uppercase by libavcodec during init.
|
|
*/
|
|
unsigned int codec_tag;
|
|
|
|
/**
|
|
* fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
|
|
* This is used to work around some encoder bugs.
|
|
* - encoding: unused
|
|
* - decoding: Set by user, will be converted to uppercase by libavcodec during init.
|
|
*/
|
|
unsigned int stream_codec_tag;
|
|
|
|
void *priv_data;
|
|
|
|
/**
|
|
* Private context used for internal data.
|
|
*
|
|
* Unlike priv_data, this is not codec-specific. It is used in general
|
|
* libavcodec functions.
|
|
*/
|
|
struct AVCodecInternal *internal;
|
|
|
|
/**
|
|
* Private data of the user, can be used to carry app specific stuff.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
void *opaque;
|
|
|
|
/**
|
|
* the average bitrate
|
|
* - encoding: Set by user; unused for constant quantizer encoding.
|
|
* - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
|
|
*/
|
|
int bit_rate;
|
|
|
|
/**
|
|
* number of bits the bitstream is allowed to diverge from the reference.
|
|
* the reference can be CBR (for CBR pass1) or VBR (for pass2)
|
|
* - encoding: Set by user; unused for constant quantizer encoding.
|
|
* - decoding: unused
|
|
*/
|
|
int bit_rate_tolerance;
|
|
|
|
/**
|
|
* Global quality for codecs which cannot change it per frame.
|
|
* This should be proportional to MPEG-1/2/4 qscale.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int global_quality;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int compression_level;
|
|
#define FF_COMPRESSION_DEFAULT -1
|
|
|
|
/**
|
|
* CODEC_FLAG_*.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int flags;
|
|
|
|
/**
|
|
* CODEC_FLAG2_*
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int flags2;
|
|
|
|
/**
|
|
* some codecs need / can use extradata like Huffman tables.
|
|
* mjpeg: Huffman tables
|
|
* rv10: additional flags
|
|
* mpeg4: global headers (they can be in the bitstream or here)
|
|
* The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
|
|
* than extradata_size to avoid prolems if it is read with the bitstream reader.
|
|
* The bytewise contents of extradata must not depend on the architecture or CPU endianness.
|
|
* - encoding: Set/allocated/freed by libavcodec.
|
|
* - decoding: Set/allocated/freed by user.
|
|
*/
|
|
uint8_t *extradata;
|
|
int extradata_size;
|
|
|
|
/**
|
|
* This is the fundamental unit of time (in seconds) in terms
|
|
* of which frame timestamps are represented. For fixed-fps content,
|
|
* timebase should be 1/framerate and timestamp increments should be
|
|
* identically 1.
|
|
* - encoding: MUST be set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
AVRational time_base;
|
|
|
|
/**
|
|
* For some codecs, the time base is closer to the field rate than the frame rate.
|
|
* Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
|
|
* if no telecine is used ...
|
|
*
|
|
* Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
|
|
*/
|
|
int ticks_per_frame;
|
|
|
|
/**
|
|
* Codec delay.
|
|
*
|
|
* Video:
|
|
* Number of frames the decoded output will be delayed relative to the
|
|
* encoded input.
|
|
*
|
|
* Audio:
|
|
* For encoding, this is the number of "priming" samples added to the
|
|
* beginning of the stream. The decoded output will be delayed by this
|
|
* many samples relative to the input to the encoder. Note that this
|
|
* field is purely informational and does not directly affect the pts
|
|
* output by the encoder, which should always be based on the actual
|
|
* presentation time, including any delay.
|
|
* For decoding, this is the number of samples the decoder needs to
|
|
* output before the decoder's output is valid. When seeking, you should
|
|
* start decoding this many samples prior to your desired seek point.
|
|
*
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int delay;
|
|
|
|
|
|
/* video only */
|
|
/**
|
|
* picture width / height.
|
|
* - encoding: MUST be set by user.
|
|
* - decoding: May be set by the user before opening the decoder if known e.g.
|
|
* from the container. Some decoders will require the dimensions
|
|
* to be set by the caller. During decoding, the decoder may
|
|
* overwrite those values as required.
|
|
*/
|
|
int width, height;
|
|
|
|
/**
|
|
* Bitstream width / height, may be different from width/height e.g. when
|
|
* the decoded frame is cropped before being output.
|
|
* - encoding: unused
|
|
* - decoding: May be set by the user before opening the decoder if known
|
|
* e.g. from the container. During decoding, the decoder may
|
|
* overwrite those values as required.
|
|
*/
|
|
int coded_width, coded_height;
|
|
|
|
#define FF_ASPECT_EXTENDED 15
|
|
|
|
/**
|
|
* the number of pictures in a group of pictures, or 0 for intra_only
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int gop_size;
|
|
|
|
/**
|
|
* Pixel format, see AV_PIX_FMT_xxx.
|
|
* May be set by the demuxer if known from headers.
|
|
* May be overriden by the decoder if it knows better.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user if known, overridden by libavcodec if known
|
|
*/
|
|
enum AVPixelFormat pix_fmt;
|
|
|
|
/**
|
|
* Motion estimation algorithm used for video coding.
|
|
* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
|
|
* 8 (umh), 10 (tesa) [7, 8, 10 are x264 specific]
|
|
* - encoding: MUST be set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_method;
|
|
|
|
/**
|
|
* If non NULL, 'draw_horiz_band' is called by the libavcodec
|
|
* decoder to draw a horizontal band. It improves cache usage. Not
|
|
* all codecs can do that. You must check the codec capabilities
|
|
* beforehand.
|
|
* When multithreading is used, it may be called from multiple threads
|
|
* at the same time; threads might draw different parts of the same AVFrame,
|
|
* or multiple AVFrames, and there is no guarantee that slices will be drawn
|
|
* in order.
|
|
* The function is also used by hardware acceleration APIs.
|
|
* It is called at least once during frame decoding to pass
|
|
* the data needed for hardware render.
|
|
* In that mode instead of pixel data, AVFrame points to
|
|
* a structure specific to the acceleration API. The application
|
|
* reads the structure and can change some fields to indicate progress
|
|
* or mark state.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
* @param height the height of the slice
|
|
* @param y the y position of the slice
|
|
* @param type 1->top field, 2->bottom field, 3->frame
|
|
* @param offset offset into the AVFrame.data from which the slice should be read
|
|
*/
|
|
void (*draw_horiz_band)(struct AVCodecContext *s,
|
|
const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
|
|
int y, int type, int height);
|
|
|
|
/**
|
|
* callback to negotiate the pixelFormat
|
|
* @param fmt is the list of formats which are supported by the codec,
|
|
* it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
|
|
* The first is always the native one.
|
|
* @return the chosen format
|
|
* - encoding: unused
|
|
* - decoding: Set by user, if not set the native format will be chosen.
|
|
*/
|
|
enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
|
|
|
|
/**
|
|
* maximum number of B-frames between non-B-frames
|
|
* Note: The output will be delayed by max_b_frames+1 relative to the input.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int max_b_frames;
|
|
|
|
/**
|
|
* qscale factor between IP and B-frames
|
|
* If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
|
|
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float b_quant_factor;
|
|
|
|
/** obsolete FIXME remove */
|
|
int rc_strategy;
|
|
#define FF_RC_STRATEGY_XVID 1
|
|
|
|
int b_frame_strategy;
|
|
|
|
/**
|
|
* qscale offset between IP and B-frames
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float b_quant_offset;
|
|
|
|
/**
|
|
* Size of the frame reordering buffer in the decoder.
|
|
* For MPEG-2 it is 1 IPB or 0 low delay IP.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int has_b_frames;
|
|
|
|
/**
|
|
* 0-> h263 quant 1-> mpeg quant
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mpeg_quant;
|
|
|
|
/**
|
|
* qscale factor between P and I-frames
|
|
* If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
|
|
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float i_quant_factor;
|
|
|
|
/**
|
|
* qscale offset between P and I-frames
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float i_quant_offset;
|
|
|
|
/**
|
|
* luminance masking (0-> disabled)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float lumi_masking;
|
|
|
|
/**
|
|
* temporary complexity masking (0-> disabled)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float temporal_cplx_masking;
|
|
|
|
/**
|
|
* spatial complexity masking (0-> disabled)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float spatial_cplx_masking;
|
|
|
|
/**
|
|
* p block masking (0-> disabled)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float p_masking;
|
|
|
|
/**
|
|
* darkness masking (0-> disabled)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float dark_masking;
|
|
|
|
/**
|
|
* slice count
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by user (or 0).
|
|
*/
|
|
int slice_count;
|
|
/**
|
|
* prediction method (needed for huffyuv)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int prediction_method;
|
|
#define FF_PRED_LEFT 0
|
|
#define FF_PRED_PLANE 1
|
|
#define FF_PRED_MEDIAN 2
|
|
|
|
/**
|
|
* slice offsets in the frame in bytes
|
|
* - encoding: Set/allocated by libavcodec.
|
|
* - decoding: Set/allocated by user (or NULL).
|
|
*/
|
|
int *slice_offset;
|
|
|
|
/**
|
|
* sample aspect ratio (0 if unknown)
|
|
* That is the width of a pixel divided by the height of the pixel.
|
|
* Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
AVRational sample_aspect_ratio;
|
|
|
|
/**
|
|
* motion estimation comparison function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_cmp;
|
|
/**
|
|
* subpixel motion estimation comparison function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_sub_cmp;
|
|
/**
|
|
* macroblock comparison function (not supported yet)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mb_cmp;
|
|
/**
|
|
* interlaced DCT comparison function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int ildct_cmp;
|
|
#define FF_CMP_SAD 0
|
|
#define FF_CMP_SSE 1
|
|
#define FF_CMP_SATD 2
|
|
#define FF_CMP_DCT 3
|
|
#define FF_CMP_PSNR 4
|
|
#define FF_CMP_BIT 5
|
|
#define FF_CMP_RD 6
|
|
#define FF_CMP_ZERO 7
|
|
#define FF_CMP_VSAD 8
|
|
#define FF_CMP_VSSE 9
|
|
#define FF_CMP_NSSE 10
|
|
#define FF_CMP_DCTMAX 13
|
|
#define FF_CMP_DCT264 14
|
|
#define FF_CMP_CHROMA 256
|
|
|
|
/**
|
|
* ME diamond size & shape
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int dia_size;
|
|
|
|
/**
|
|
* amount of previous MV predictors (2a+1 x 2a+1 square)
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int last_predictor_count;
|
|
|
|
/**
|
|
* prepass for motion estimation
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int pre_me;
|
|
|
|
/**
|
|
* motion estimation prepass comparison function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_pre_cmp;
|
|
|
|
/**
|
|
* ME prepass diamond size & shape
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int pre_dia_size;
|
|
|
|
/**
|
|
* subpel ME quality
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_subpel_quality;
|
|
|
|
/**
|
|
* DTG active format information (additional aspect ratio
|
|
* information only used in DVB MPEG-2 transport streams)
|
|
* 0 if not set.
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by decoder.
|
|
*/
|
|
int dtg_active_format;
|
|
#define FF_DTG_AFD_SAME 8
|
|
#define FF_DTG_AFD_4_3 9
|
|
#define FF_DTG_AFD_16_9 10
|
|
#define FF_DTG_AFD_14_9 11
|
|
#define FF_DTG_AFD_4_3_SP_14_9 13
|
|
#define FF_DTG_AFD_16_9_SP_14_9 14
|
|
#define FF_DTG_AFD_SP_4_3 15
|
|
|
|
/**
|
|
* maximum motion estimation search range in subpel units
|
|
* If 0 then no limit.
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_range;
|
|
|
|
/**
|
|
* intra quantizer bias
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int intra_quant_bias;
|
|
#define FF_DEFAULT_QUANT_BIAS 999999
|
|
|
|
/**
|
|
* inter quantizer bias
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int inter_quant_bias;
|
|
|
|
/**
|
|
* slice flags
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int slice_flags;
|
|
#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
|
|
#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
|
|
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
|
|
|
|
/**
|
|
* XVideo Motion Acceleration
|
|
* - encoding: forbidden
|
|
* - decoding: set by decoder
|
|
*/
|
|
int xvmc_acceleration;
|
|
|
|
/**
|
|
* macroblock decision mode
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mb_decision;
|
|
#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
|
|
#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
|
|
#define FF_MB_DECISION_RD 2 ///< rate distortion
|
|
|
|
/**
|
|
* custom intra quantization matrix
|
|
* - encoding: Set by user, can be NULL.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
uint16_t *intra_matrix;
|
|
|
|
/**
|
|
* custom inter quantization matrix
|
|
* - encoding: Set by user, can be NULL.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
uint16_t *inter_matrix;
|
|
|
|
/**
|
|
* scene change detection threshold
|
|
* 0 is default, larger means fewer detected scene changes.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int scenechange_threshold;
|
|
|
|
/**
|
|
* noise reduction strength
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int noise_reduction;
|
|
|
|
/**
|
|
* Motion estimation threshold below which no motion estimation is
|
|
* performed, but instead the user specified motion vectors are used.
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_threshold;
|
|
|
|
/**
|
|
* Macroblock threshold below which the user specified macroblock types will be used.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mb_threshold;
|
|
|
|
/**
|
|
* precision of the intra DC coefficient - 8
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int intra_dc_precision;
|
|
|
|
/**
|
|
* Number of macroblock rows at the top which are skipped.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int skip_top;
|
|
|
|
/**
|
|
* Number of macroblock rows at the bottom which are skipped.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int skip_bottom;
|
|
|
|
/**
|
|
* Border processing masking, raises the quantizer for mbs on the borders
|
|
* of the picture.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float border_masking;
|
|
|
|
/**
|
|
* minimum MB lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mb_lmin;
|
|
|
|
/**
|
|
* maximum MB lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mb_lmax;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int me_penalty_compensation;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int bidir_refine;
|
|
|
|
/**
|
|
*
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int brd_scale;
|
|
|
|
/**
|
|
* minimum GOP size
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int keyint_min;
|
|
|
|
/**
|
|
* number of reference frames
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by lavc.
|
|
*/
|
|
int refs;
|
|
|
|
/**
|
|
* chroma qp offset from luma
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int chromaoffset;
|
|
|
|
/**
|
|
* Multiplied by qscale for each frame and added to scene_change_score.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int scenechange_factor;
|
|
|
|
/**
|
|
*
|
|
* Note: Value depends upon the compare function used for fullpel ME.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int mv0_threshold;
|
|
|
|
/**
|
|
* Adjust sensitivity of b_frame_strategy 1.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int b_sensitivity;
|
|
|
|
/**
|
|
* Chromaticity coordinates of the source primaries.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVColorPrimaries color_primaries;
|
|
|
|
/**
|
|
* Color Transfer Characteristic.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVColorTransferCharacteristic color_trc;
|
|
|
|
/**
|
|
* YUV colorspace type.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVColorSpace colorspace;
|
|
|
|
/**
|
|
* MPEG vs JPEG YUV range.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVColorRange color_range;
|
|
|
|
/**
|
|
* This defines the location of chroma samples.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVChromaLocation chroma_sample_location;
|
|
|
|
/**
|
|
* Number of slices.
|
|
* Indicates number of picture subdivisions. Used for parallelized
|
|
* decoding.
|
|
* - encoding: Set by user
|
|
* - decoding: unused
|
|
*/
|
|
int slices;
|
|
|
|
/** Field order
|
|
* - encoding: set by libavcodec
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
enum AVFieldOrder field_order;
|
|
|
|
/* audio only */
|
|
int sample_rate; ///< samples per second
|
|
int channels; ///< number of audio channels
|
|
|
|
/**
|
|
* audio sample format
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
enum AVSampleFormat sample_fmt; ///< sample format
|
|
|
|
/* The following data should not be initialized. */
|
|
/**
|
|
* Number of samples per channel in an audio frame.
|
|
*
|
|
* - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
|
|
* except the last must contain exactly frame_size samples per channel.
|
|
* May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
|
|
* frame size is not restricted.
|
|
* - decoding: may be set by some decoders to indicate constant frame size
|
|
*/
|
|
int frame_size;
|
|
|
|
/**
|
|
* Frame counter, set by libavcodec.
|
|
*
|
|
* - decoding: total number of frames returned from the decoder so far.
|
|
* - encoding: total number of frames passed to the encoder so far.
|
|
*
|
|
* @note the counter is not incremented if encoding/decoding resulted in
|
|
* an error.
|
|
*/
|
|
int frame_number;
|
|
|
|
/**
|
|
* number of bytes per packet if constant and known or 0
|
|
* Used by some WAV based audio codecs.
|
|
*/
|
|
int block_align;
|
|
|
|
/**
|
|
* Audio cutoff bandwidth (0 means "automatic")
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int cutoff;
|
|
|
|
#if FF_API_REQUEST_CHANNELS
|
|
/**
|
|
* Decoder should decode to this many channels if it can (0 for default)
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
* @deprecated Deprecated in favor of request_channel_layout.
|
|
*/
|
|
attribute_deprecated int request_channels;
|
|
#endif
|
|
|
|
/**
|
|
* Audio channel layout.
|
|
* - encoding: set by user.
|
|
* - decoding: set by libavcodec.
|
|
*/
|
|
uint64_t channel_layout;
|
|
|
|
/**
|
|
* Request decoder to use this channel layout if it can (0 for default)
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
uint64_t request_channel_layout;
|
|
|
|
/**
|
|
* Type of service that the audio stream conveys.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
enum AVAudioServiceType audio_service_type;
|
|
|
|
/**
|
|
* Used to request a sample format from the decoder.
|
|
* - encoding: unused.
|
|
* - decoding: Set by user.
|
|
*/
|
|
enum AVSampleFormat request_sample_fmt;
|
|
|
|
#if FF_API_GET_BUFFER
|
|
/**
|
|
* Called at the beginning of each frame to get a buffer for it.
|
|
*
|
|
* The function will set AVFrame.data[], AVFrame.linesize[].
|
|
* AVFrame.extended_data[] must also be set, but it should be the same as
|
|
* AVFrame.data[] except for planar audio with more channels than can fit
|
|
* in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
|
|
* many data pointers as it can hold.
|
|
*
|
|
* if CODEC_CAP_DR1 is not set then get_buffer() must call
|
|
* avcodec_default_get_buffer() instead of providing buffers allocated by
|
|
* some other means.
|
|
*
|
|
* AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
|
|
* need it. avcodec_default_get_buffer() aligns the output buffer properly,
|
|
* but if get_buffer() is overridden then alignment considerations should
|
|
* be taken into account.
|
|
*
|
|
* @see avcodec_default_get_buffer()
|
|
*
|
|
* Video:
|
|
*
|
|
* If pic.reference is set then the frame will be read later by libavcodec.
|
|
* avcodec_align_dimensions2() should be used to find the required width and
|
|
* height, as they normally need to be rounded up to the next multiple of 16.
|
|
*
|
|
* If frame multithreading is used and thread_safe_callbacks is set,
|
|
* it may be called from a different thread, but not from more than one at
|
|
* once. Does not need to be reentrant.
|
|
*
|
|
* @see release_buffer(), reget_buffer()
|
|
* @see avcodec_align_dimensions2()
|
|
*
|
|
* Audio:
|
|
*
|
|
* Decoders request a buffer of a particular size by setting
|
|
* AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
|
|
* however, utilize only part of the buffer by setting AVFrame.nb_samples
|
|
* to a smaller value in the output frame.
|
|
*
|
|
* Decoders cannot use the buffer after returning from
|
|
* avcodec_decode_audio4(), so they will not call release_buffer(), as it
|
|
* is assumed to be released immediately upon return. In some rare cases,
|
|
* a decoder may need to call get_buffer() more than once in a single
|
|
* call to avcodec_decode_audio4(). In that case, when get_buffer() is
|
|
* called again after it has already been called once, the previously
|
|
* acquired buffer is assumed to be released at that time and may not be
|
|
* reused by the decoder.
|
|
*
|
|
* As a convenience, av_samples_get_buffer_size() and
|
|
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
|
|
* functions to find the required data size and to fill data pointers and
|
|
* linesize. In AVFrame.linesize, only linesize[0] may be set for audio
|
|
* since all planes must be the same size.
|
|
*
|
|
* @see av_samples_get_buffer_size(), av_samples_fill_arrays()
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*
|
|
* @deprecated use get_buffer2()
|
|
*/
|
|
attribute_deprecated
|
|
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
|
/**
|
|
* Called to release buffers which were allocated with get_buffer.
|
|
* A released buffer can be reused in get_buffer().
|
|
* pic.data[*] must be set to NULL.
|
|
* May be called from a different thread if frame multithreading is used,
|
|
* but not by more than one thread at once, so does not need to be reentrant.
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*
|
|
* @deprecated custom freeing callbacks should be set from get_buffer2()
|
|
*/
|
|
attribute_deprecated
|
|
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
|
|
/**
|
|
* Called at the beginning of a frame to get cr buffer for it.
|
|
* Buffer type (size, hints) must be the same. libavcodec won't check it.
|
|
* libavcodec will pass previous buffer in pic, function should return
|
|
* same buffer or new buffer with old frame "painted" into it.
|
|
* If pic.data[0] == NULL must behave like get_buffer().
|
|
* if CODEC_CAP_DR1 is not set then reget_buffer() must call
|
|
* avcodec_default_reget_buffer() instead of providing buffers allocated by
|
|
* some other means.
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*/
|
|
attribute_deprecated
|
|
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
|
|
#endif
|
|
|
|
/**
|
|
* This callback is called at the beginning of each frame to get data
|
|
* buffer(s) for it. There may be one contiguous buffer for all the data or
|
|
* there may be a buffer per each data plane or anything in between. What
|
|
* this means is, you may set however many entries in buf[] you feel necessary.
|
|
* Each buffer must be reference-counted using the AVBuffer API (see description
|
|
* of buf[] below).
|
|
*
|
|
* The following fields will be set in the frame before this callback is
|
|
* called:
|
|
* - format
|
|
* - width, height (video only)
|
|
* - sample_rate, channel_layout, nb_samples (audio only)
|
|
* Their values may differ from the corresponding values in
|
|
* AVCodecContext. This callback must use the frame values, not the codec
|
|
* context values, to calculate the required buffer size.
|
|
*
|
|
* This callback must fill the following fields in the frame:
|
|
* - data[]
|
|
* - linesize[]
|
|
* - extended_data:
|
|
* * if the data is planar audio with more than 8 channels, then this
|
|
* callback must allocate and fill extended_data to contain all pointers
|
|
* to all data planes. data[] must hold as many pointers as it can.
|
|
* extended_data must be allocated with av_malloc() and will be freed in
|
|
* av_frame_unref().
|
|
* * otherwise exended_data must point to data
|
|
* - buf[] must contain one or more pointers to AVBufferRef structures. Each of
|
|
* the frame's data and extended_data pointers must be contained in these. That
|
|
* is, one AVBufferRef for each allocated chunk of memory, not necessarily one
|
|
* AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
|
|
* and av_buffer_ref().
|
|
* - extended_buf and nb_extended_buf must be allocated with av_malloc() by
|
|
* this callback and filled with the extra buffers if there are more
|
|
* buffers than buf[] can hold. extended_buf will be freed in
|
|
* av_frame_unref().
|
|
*
|
|
* If CODEC_CAP_DR1 is not set then get_buffer2() must call
|
|
* avcodec_default_get_buffer2() instead of providing buffers allocated by
|
|
* some other means.
|
|
*
|
|
* Each data plane must be aligned to the maximum required by the target
|
|
* CPU.
|
|
*
|
|
* @see avcodec_default_get_buffer2()
|
|
*
|
|
* Video:
|
|
*
|
|
* If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
|
|
* (read and/or written to if it is writable) later by libavcodec.
|
|
*
|
|
* If CODEC_FLAG_EMU_EDGE is not set in s->flags, the buffer must contain an
|
|
* edge of the size returned by avcodec_get_edge_width() on all sides.
|
|
*
|
|
* avcodec_align_dimensions2() should be used to find the required width and
|
|
* height, as they normally need to be rounded up to the next multiple of 16.
|
|
*
|
|
* If frame multithreading is used and thread_safe_callbacks is set,
|
|
* this callback may be called from a different thread, but not from more
|
|
* than one at once. Does not need to be reentrant.
|
|
*
|
|
* @see avcodec_align_dimensions2()
|
|
*
|
|
* Audio:
|
|
*
|
|
* Decoders request a buffer of a particular size by setting
|
|
* AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
|
|
* however, utilize only part of the buffer by setting AVFrame.nb_samples
|
|
* to a smaller value in the output frame.
|
|
*
|
|
* As a convenience, av_samples_get_buffer_size() and
|
|
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
|
|
* functions to find the required data size and to fill data pointers and
|
|
* linesize. In AVFrame.linesize, only linesize[0] may be set for audio
|
|
* since all planes must be the same size.
|
|
*
|
|
* @see av_samples_get_buffer_size(), av_samples_fill_arrays()
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*/
|
|
int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
|
|
|
|
/**
|
|
* If non-zero, the decoded audio and video frames returned from
|
|
* avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
|
|
* and are valid indefinitely. The caller must free them with
|
|
* av_frame_unref() when they are not needed anymore.
|
|
* Otherwise, the decoded frames must not be freed by the caller and are
|
|
* only valid until the next decode call.
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: set by the caller before avcodec_open2().
|
|
*/
|
|
int refcounted_frames;
|
|
|
|
/* - encoding parameters */
|
|
float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
|
|
float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
|
|
|
|
/**
|
|
* minimum quantizer
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int qmin;
|
|
|
|
/**
|
|
* maximum quantizer
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int qmax;
|
|
|
|
/**
|
|
* maximum quantizer difference between frames
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int max_qdiff;
|
|
|
|
/**
|
|
* ratecontrol qmin qmax limiting method
|
|
* 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float rc_qsquish;
|
|
|
|
float rc_qmod_amp;
|
|
int rc_qmod_freq;
|
|
|
|
/**
|
|
* decoder bitstream buffer size
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_buffer_size;
|
|
|
|
/**
|
|
* ratecontrol override, see RcOverride
|
|
* - encoding: Allocated/set/freed by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_override_count;
|
|
RcOverride *rc_override;
|
|
|
|
/**
|
|
* rate control equation
|
|
* - encoding: Set by user
|
|
* - decoding: unused
|
|
*/
|
|
const char *rc_eq;
|
|
|
|
/**
|
|
* maximum bitrate
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_max_rate;
|
|
|
|
/**
|
|
* minimum bitrate
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_min_rate;
|
|
|
|
float rc_buffer_aggressivity;
|
|
|
|
/**
|
|
* initial complexity for pass1 ratecontrol
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
float rc_initial_cplx;
|
|
|
|
/**
|
|
* Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused.
|
|
*/
|
|
float rc_max_available_vbv_use;
|
|
|
|
/**
|
|
* Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused.
|
|
*/
|
|
float rc_min_vbv_overflow_use;
|
|
|
|
/**
|
|
* Number of bits which should be loaded into the rc buffer before decoding starts.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int rc_initial_buffer_occupancy;
|
|
|
|
#define FF_CODER_TYPE_VLC 0
|
|
#define FF_CODER_TYPE_AC 1
|
|
#define FF_CODER_TYPE_RAW 2
|
|
#define FF_CODER_TYPE_RLE 3
|
|
#define FF_CODER_TYPE_DEFLATE 4
|
|
/**
|
|
* coder type
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int coder_type;
|
|
|
|
/**
|
|
* context model
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int context_model;
|
|
|
|
/**
|
|
* minimum Lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int lmin;
|
|
|
|
/**
|
|
* maximum Lagrange multipler
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int lmax;
|
|
|
|
/**
|
|
* frame skip threshold
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int frame_skip_threshold;
|
|
|
|
/**
|
|
* frame skip factor
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int frame_skip_factor;
|
|
|
|
/**
|
|
* frame skip exponent
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int frame_skip_exp;
|
|
|
|
/**
|
|
* frame skip comparison function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int frame_skip_cmp;
|
|
|
|
/**
|
|
* trellis RD quantization
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int trellis;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int min_prediction_order;
|
|
|
|
/**
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int max_prediction_order;
|
|
|
|
/**
|
|
* GOP timecode frame start number, in non drop frame format
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int64_t timecode_frame_start;
|
|
|
|
/* The RTP callback: This function is called */
|
|
/* every time the encoder has a packet to send. */
|
|
/* It depends on the encoder if the data starts */
|
|
/* with a Start Code (it should). H.263 does. */
|
|
/* mb_nb contains the number of macroblocks */
|
|
/* encoded in the RTP payload. */
|
|
void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
|
|
|
|
int rtp_payload_size; /* The size of the RTP payload: the coder will */
|
|
/* do its best to deliver a chunk with size */
|
|
/* below rtp_payload_size, the chunk will start */
|
|
/* with a start code on some codecs like H.263. */
|
|
/* This doesn't take account of any particular */
|
|
/* headers inside the transmitted RTP payload. */
|
|
|
|
/* statistics, used for 2-pass encoding */
|
|
int mv_bits;
|
|
int header_bits;
|
|
int i_tex_bits;
|
|
int p_tex_bits;
|
|
int i_count;
|
|
int p_count;
|
|
int skip_count;
|
|
int misc_bits;
|
|
|
|
/**
|
|
* number of bits used for the previously encoded frame
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: unused
|
|
*/
|
|
int frame_bits;
|
|
|
|
/**
|
|
* pass1 encoding statistics output buffer
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: unused
|
|
*/
|
|
char *stats_out;
|
|
|
|
/**
|
|
* pass2 encoding statistics input buffer
|
|
* Concatenated stuff from stats_out of pass1 should be placed here.
|
|
* - encoding: Allocated/set/freed by user.
|
|
* - decoding: unused
|
|
*/
|
|
char *stats_in;
|
|
|
|
/**
|
|
* Work around bugs in encoders which sometimes cannot be detected automatically.
|
|
* - encoding: Set by user
|
|
* - decoding: Set by user
|
|
*/
|
|
int workaround_bugs;
|
|
#define FF_BUG_AUTODETECT 1 ///< autodetection
|
|
#define FF_BUG_OLD_MSMPEG4 2
|
|
#define FF_BUG_XVID_ILACE 4
|
|
#define FF_BUG_UMP4 8
|
|
#define FF_BUG_NO_PADDING 16
|
|
#define FF_BUG_AMV 32
|
|
#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
|
|
#define FF_BUG_QPEL_CHROMA 64
|
|
#define FF_BUG_STD_QPEL 128
|
|
#define FF_BUG_QPEL_CHROMA2 256
|
|
#define FF_BUG_DIRECT_BLOCKSIZE 512
|
|
#define FF_BUG_EDGE 1024
|
|
#define FF_BUG_HPEL_CHROMA 2048
|
|
#define FF_BUG_DC_CLIP 4096
|
|
#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
|
|
#define FF_BUG_TRUNCATED 16384
|
|
|
|
/**
|
|
* strictly follow the standard (MPEG4, ...).
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
* Setting this to STRICT or higher means the encoder and decoder will
|
|
* generally do stupid things, whereas setting it to unofficial or lower
|
|
* will mean the encoder might produce output that is not supported by all
|
|
* spec-compliant decoders. Decoders don't differentiate between normal,
|
|
* unofficial and experimental (that is, they always try to decode things
|
|
* when they can) unless they are explicitly asked to behave stupidly
|
|
* (=strictly conform to the specs)
|
|
*/
|
|
int strict_std_compliance;
|
|
#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
|
|
#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
|
|
#define FF_COMPLIANCE_NORMAL 0
|
|
#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
|
|
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
|
|
|
|
/**
|
|
* error concealment flags
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int error_concealment;
|
|
#define FF_EC_GUESS_MVS 1
|
|
#define FF_EC_DEBLOCK 2
|
|
|
|
/**
|
|
* debug
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int debug;
|
|
#define FF_DEBUG_PICT_INFO 1
|
|
#define FF_DEBUG_RC 2
|
|
#define FF_DEBUG_BITSTREAM 4
|
|
#define FF_DEBUG_MB_TYPE 8
|
|
#define FF_DEBUG_QP 16
|
|
#define FF_DEBUG_MV 32
|
|
#define FF_DEBUG_DCT_COEFF 0x00000040
|
|
#define FF_DEBUG_SKIP 0x00000080
|
|
#define FF_DEBUG_STARTCODE 0x00000100
|
|
#define FF_DEBUG_PTS 0x00000200
|
|
#define FF_DEBUG_ER 0x00000400
|
|
#define FF_DEBUG_MMCO 0x00000800
|
|
#define FF_DEBUG_BUGS 0x00001000
|
|
#define FF_DEBUG_VIS_QP 0x00002000
|
|
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
|
|
#define FF_DEBUG_BUFFERS 0x00008000
|
|
#define FF_DEBUG_THREADS 0x00010000
|
|
|
|
/**
|
|
* debug
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int debug_mv;
|
|
#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
|
|
#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
|
|
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
|
|
|
|
/**
|
|
* Error recognition; may misdetect some more or less valid parts as errors.
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int err_recognition;
|
|
#define AV_EF_CRCCHECK (1<<0)
|
|
#define AV_EF_BITSTREAM (1<<1)
|
|
#define AV_EF_BUFFER (1<<2)
|
|
#define AV_EF_EXPLODE (1<<3)
|
|
|
|
/**
|
|
* opaque 64bit number (generally a PTS) that will be reordered and
|
|
* output in AVFrame.reordered_opaque
|
|
* @deprecated in favor of pkt_pts
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
int64_t reordered_opaque;
|
|
|
|
/**
|
|
* Hardware accelerator in use
|
|
* - encoding: unused.
|
|
* - decoding: Set by libavcodec
|
|
*/
|
|
struct AVHWAccel *hwaccel;
|
|
|
|
/**
|
|
* Hardware accelerator context.
|
|
* For some hardware accelerators, a global context needs to be
|
|
* provided by the user. In that case, this holds display-dependent
|
|
* data Libav cannot instantiate itself. Please refer to the
|
|
* Libav HW accelerator documentation to know how to fill this
|
|
* is. e.g. for VA API, this is a struct vaapi_context.
|
|
* - encoding: unused
|
|
* - decoding: Set by user
|
|
*/
|
|
void *hwaccel_context;
|
|
|
|
/**
|
|
* error
|
|
* - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
|
|
* - decoding: unused
|
|
*/
|
|
uint64_t error[AV_NUM_DATA_POINTERS];
|
|
|
|
/**
|
|
* DCT algorithm, see FF_DCT_* below
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int dct_algo;
|
|
#define FF_DCT_AUTO 0
|
|
#define FF_DCT_FASTINT 1
|
|
#define FF_DCT_INT 2
|
|
#define FF_DCT_MMX 3
|
|
#define FF_DCT_ALTIVEC 5
|
|
#define FF_DCT_FAAN 6
|
|
|
|
/**
|
|
* IDCT algorithm, see FF_IDCT_* below.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int idct_algo;
|
|
#define FF_IDCT_AUTO 0
|
|
#define FF_IDCT_INT 1
|
|
#define FF_IDCT_SIMPLE 2
|
|
#define FF_IDCT_SIMPLEMMX 3
|
|
#define FF_IDCT_ARM 7
|
|
#define FF_IDCT_ALTIVEC 8
|
|
#define FF_IDCT_SH4 9
|
|
#define FF_IDCT_SIMPLEARM 10
|
|
#define FF_IDCT_IPP 13
|
|
#define FF_IDCT_XVIDMMX 14
|
|
#define FF_IDCT_SIMPLEARMV5TE 16
|
|
#define FF_IDCT_SIMPLEARMV6 17
|
|
#define FF_IDCT_SIMPLEVIS 18
|
|
#define FF_IDCT_FAAN 20
|
|
#define FF_IDCT_SIMPLENEON 22
|
|
#define FF_IDCT_SIMPLEALPHA 23
|
|
|
|
/**
|
|
* bits per sample/pixel from the demuxer (needed for huffyuv).
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int bits_per_coded_sample;
|
|
|
|
/**
|
|
* Bits per sample/pixel of internal libavcodec pixel/sample format.
|
|
* - encoding: set by user.
|
|
* - decoding: set by libavcodec.
|
|
*/
|
|
int bits_per_raw_sample;
|
|
|
|
#if FF_API_LOWRES
|
|
/**
|
|
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*
|
|
* @deprecated use decoder private options instead
|
|
*/
|
|
attribute_deprecated int lowres;
|
|
#endif
|
|
|
|
/**
|
|
* the picture in the bitstream
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
AVFrame *coded_frame;
|
|
|
|
/**
|
|
* thread count
|
|
* is used to decide how many independent tasks should be passed to execute()
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int thread_count;
|
|
|
|
/**
|
|
* Which multithreading methods to use.
|
|
* Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
|
|
* so clients which cannot provide future frames should not use it.
|
|
*
|
|
* - encoding: Set by user, otherwise the default is used.
|
|
* - decoding: Set by user, otherwise the default is used.
|
|
*/
|
|
int thread_type;
|
|
#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
|
|
#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
|
|
|
|
/**
|
|
* Which multithreading methods are in use by the codec.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int active_thread_type;
|
|
|
|
/**
|
|
* Set by the client if its custom get_buffer() callback can be called
|
|
* synchronously from another thread, which allows faster multithreaded decoding.
|
|
* draw_horiz_band() will be called from other threads regardless of this setting.
|
|
* Ignored if the default get_buffer() is used.
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by user.
|
|
*/
|
|
int thread_safe_callbacks;
|
|
|
|
/**
|
|
* The codec may call this to execute several independent things.
|
|
* It will return only after finishing all tasks.
|
|
* The user may replace this with some multithreaded implementation,
|
|
* the default implementation will execute the parts serially.
|
|
* @param count the number of things to execute
|
|
* - encoding: Set by libavcodec, user can override.
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*/
|
|
int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
|
|
|
|
/**
|
|
* The codec may call this to execute several independent things.
|
|
* It will return only after finishing all tasks.
|
|
* The user may replace this with some multithreaded implementation,
|
|
* the default implementation will execute the parts serially.
|
|
* Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
|
|
* @param c context passed also to func
|
|
* @param count the number of things to execute
|
|
* @param arg2 argument passed unchanged to func
|
|
* @param ret return values of executed functions, must have space for "count" values. May be NULL.
|
|
* @param func function that will be called count times, with jobnr from 0 to count-1.
|
|
* threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
|
|
* two instances of func executing at the same time will have the same threadnr.
|
|
* @return always 0 currently, but code should handle a future improvement where when any call to func
|
|
* returns < 0 no further calls to func may be done and < 0 is returned.
|
|
* - encoding: Set by libavcodec, user can override.
|
|
* - decoding: Set by libavcodec, user can override.
|
|
*/
|
|
int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
|
|
|
|
/**
|
|
* thread opaque
|
|
* Can be used by execute() to store some per AVCodecContext stuff.
|
|
* - encoding: set by execute()
|
|
* - decoding: set by execute()
|
|
*/
|
|
void *thread_opaque;
|
|
|
|
/**
|
|
* noise vs. sse weight for the nsse comparsion function
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int nsse_weight;
|
|
|
|
/**
|
|
* profile
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int profile;
|
|
#define FF_PROFILE_UNKNOWN -99
|
|
#define FF_PROFILE_RESERVED -100
|
|
|
|
#define FF_PROFILE_AAC_MAIN 0
|
|
#define FF_PROFILE_AAC_LOW 1
|
|
#define FF_PROFILE_AAC_SSR 2
|
|
#define FF_PROFILE_AAC_LTP 3
|
|
#define FF_PROFILE_AAC_HE 4
|
|
#define FF_PROFILE_AAC_HE_V2 28
|
|
#define FF_PROFILE_AAC_LD 22
|
|
#define FF_PROFILE_AAC_ELD 38
|
|
#define FF_PROFILE_MPEG2_AAC_LOW 128
|
|
#define FF_PROFILE_MPEG2_AAC_HE 131
|
|
|
|
#define FF_PROFILE_DTS 20
|
|
#define FF_PROFILE_DTS_ES 30
|
|
#define FF_PROFILE_DTS_96_24 40
|
|
#define FF_PROFILE_DTS_HD_HRA 50
|
|
#define FF_PROFILE_DTS_HD_MA 60
|
|
|
|
#define FF_PROFILE_MPEG2_422 0
|
|
#define FF_PROFILE_MPEG2_HIGH 1
|
|
#define FF_PROFILE_MPEG2_SS 2
|
|
#define FF_PROFILE_MPEG2_SNR_SCALABLE 3
|
|
#define FF_PROFILE_MPEG2_MAIN 4
|
|
#define FF_PROFILE_MPEG2_SIMPLE 5
|
|
|
|
#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
|
|
#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
|
|
|
|
#define FF_PROFILE_H264_BASELINE 66
|
|
#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
|
|
#define FF_PROFILE_H264_MAIN 77
|
|
#define FF_PROFILE_H264_EXTENDED 88
|
|
#define FF_PROFILE_H264_HIGH 100
|
|
#define FF_PROFILE_H264_HIGH_10 110
|
|
#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
|
|
#define FF_PROFILE_H264_HIGH_422 122
|
|
#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
|
|
#define FF_PROFILE_H264_HIGH_444 144
|
|
#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
|
|
#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
|
|
#define FF_PROFILE_H264_CAVLC_444 44
|
|
|
|
#define FF_PROFILE_VC1_SIMPLE 0
|
|
#define FF_PROFILE_VC1_MAIN 1
|
|
#define FF_PROFILE_VC1_COMPLEX 2
|
|
#define FF_PROFILE_VC1_ADVANCED 3
|
|
|
|
#define FF_PROFILE_MPEG4_SIMPLE 0
|
|
#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
|
|
#define FF_PROFILE_MPEG4_CORE 2
|
|
#define FF_PROFILE_MPEG4_MAIN 3
|
|
#define FF_PROFILE_MPEG4_N_BIT 4
|
|
#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
|
|
#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
|
|
#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
|
|
#define FF_PROFILE_MPEG4_HYBRID 8
|
|
#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
|
|
#define FF_PROFILE_MPEG4_CORE_SCALABLE 10
|
|
#define FF_PROFILE_MPEG4_ADVANCED_CODING 11
|
|
#define FF_PROFILE_MPEG4_ADVANCED_CORE 12
|
|
#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
|
|
#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
|
|
#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
|
|
|
|
#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0
|
|
#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1
|
|
#define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2
|
|
#define FF_PROFILE_JPEG2000_DCINEMA_2K 3
|
|
#define FF_PROFILE_JPEG2000_DCINEMA_4K 4
|
|
|
|
/**
|
|
* level
|
|
* - encoding: Set by user.
|
|
* - decoding: Set by libavcodec.
|
|
*/
|
|
int level;
|
|
#define FF_LEVEL_UNKNOWN -99
|
|
|
|
/**
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
enum AVDiscard skip_loop_filter;
|
|
|
|
/**
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
enum AVDiscard skip_idct;
|
|
|
|
/**
|
|
*
|
|
* - encoding: unused
|
|
* - decoding: Set by user.
|
|
*/
|
|
enum AVDiscard skip_frame;
|
|
|
|
/**
|
|
* Header containing style information for text subtitles.
|
|
* For SUBTITLE_ASS subtitle type, it should contain the whole ASS
|
|
* [Script Info] and [V4+ Styles] section, plus the [Events] line and
|
|
* the Format line following. It shouldn't include any Dialogue line.
|
|
* - encoding: Set/allocated/freed by user (before avcodec_open2())
|
|
* - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
|
|
*/
|
|
uint8_t *subtitle_header;
|
|
int subtitle_header_size;
|
|
|
|
/**
|
|
* Simulates errors in the bitstream to test error concealment.
|
|
* - encoding: Set by user.
|
|
* - decoding: unused
|
|
*/
|
|
int error_rate;
|
|
|
|
/**
|
|
* Current packet as passed into the decoder, to avoid having
|
|
* to pass the packet into every function. Currently only valid
|
|
* inside lavc and get/release_buffer callbacks.
|
|
* - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts
|
|
* - encoding: unused
|
|
*/
|
|
AVPacket *pkt;
|
|
|
|
/**
|
|
* VBV delay coded in the last frame (in periods of a 27 MHz clock).
|
|
* Used for compliant TS muxing.
|
|
* - encoding: Set by libavcodec.
|
|
* - decoding: unused.
|
|
*/
|
|
uint64_t vbv_delay;
|
|
} AVCodecContext;
|
|
|
|
/**
|
|
* AVProfile.
|
|
*/
|
|
typedef struct AVProfile {
|
|
int profile;
|
|
const char *name; ///< short name for the profile
|
|
} AVProfile;
|
|
|
|
typedef struct AVCodecDefault AVCodecDefault;
|
|
|
|
struct AVSubtitle;
|
|
|
|
/**
|
|
* AVCodec.
|
|
*/
|
|
typedef struct AVCodec {
|
|
/**
|
|
* Name of the codec implementation.
|
|
* The name is globally unique among encoders and among decoders (but an
|
|
* encoder and a decoder can share the same name).
|
|
* This is the primary way to find a codec from the user perspective.
|
|
*/
|
|
const char *name;
|
|
/**
|
|
* Descriptive name for the codec, meant to be more human readable than name.
|
|
* You should use the NULL_IF_CONFIG_SMALL() macro to define it.
|
|
*/
|
|
const char *long_name;
|
|
enum AVMediaType type;
|
|
enum AVCodecID id;
|
|
/**
|
|
* Codec capabilities.
|
|
* see CODEC_CAP_*
|
|
*/
|
|
int capabilities;
|
|
const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
|
|
const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
|
|
const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
|
|
const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
|
|
const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
|
|
attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
|
|
const AVClass *priv_class; ///< AVClass for the private context
|
|
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
|
|
|
|
/*****************************************************************
|
|
* No fields below this line are part of the public API. They
|
|
* may not be used outside of libavcodec and can be changed and
|
|
* removed at will.
|
|
* New public fields should be added right above.
|
|
*****************************************************************
|
|
*/
|
|
int priv_data_size;
|
|
struct AVCodec *next;
|
|
/**
|
|
* @name Frame-level threading support functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* If defined, called on thread contexts when they are created.
|
|
* If the codec allocates writable tables in init(), re-allocate them here.
|
|
* priv_data will be set to a copy of the original.
|
|
*/
|
|
int (*init_thread_copy)(AVCodecContext *);
|
|
/**
|
|
* Copy necessary context variables from a previous thread context to the current one.
|
|
* If not defined, the next thread will start automatically; otherwise, the codec
|
|
* must call ff_thread_finish_setup().
|
|
*
|
|
* dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
|
|
*/
|
|
int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
|
|
/** @} */
|
|
|
|
/**
|
|
* Private codec-specific defaults.
|
|
*/
|
|
const AVCodecDefault *defaults;
|
|
|
|
/**
|
|
* Initialize codec static data, called from avcodec_register().
|
|
*/
|
|
void (*init_static_data)(struct AVCodec *codec);
|
|
|
|
int (*init)(AVCodecContext *);
|
|
int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
|
|
const struct AVSubtitle *sub);
|
|
/**
|
|
* Encode data to an AVPacket.
|
|
*
|
|
* @param avctx codec context
|
|
* @param avpkt output AVPacket (may contain a user-provided buffer)
|
|
* @param[in] frame AVFrame containing the raw data to be encoded
|
|
* @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
|
|
* non-empty packet was returned in avpkt.
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
|
|
int *got_packet_ptr);
|
|
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
|
|
int (*close)(AVCodecContext *);
|
|
/**
|
|
* Flush buffers.
|
|
* Will be called when seeking
|
|
*/
|
|
void (*flush)(AVCodecContext *);
|
|
} AVCodec;
|
|
|
|
/**
|
|
* AVHWAccel.
|
|
*/
|
|
typedef struct AVHWAccel {
|
|
/**
|
|
* Name of the hardware accelerated codec.
|
|
* The name is globally unique among encoders and among decoders (but an
|
|
* encoder and a decoder can share the same name).
|
|
*/
|
|
const char *name;
|
|
|
|
/**
|
|
* Type of codec implemented by the hardware accelerator.
|
|
*
|
|
* See AVMEDIA_TYPE_xxx
|
|
*/
|
|
enum AVMediaType type;
|
|
|
|
/**
|
|
* Codec implemented by the hardware accelerator.
|
|
*
|
|
* See AV_CODEC_ID_xxx
|
|
*/
|
|
enum AVCodecID id;
|
|
|
|
/**
|
|
* Supported pixel format.
|
|
*
|
|
* Only hardware accelerated formats are supported here.
|
|
*/
|
|
enum AVPixelFormat pix_fmt;
|
|
|
|
/**
|
|
* Hardware accelerated codec capabilities.
|
|
* see FF_HWACCEL_CODEC_CAP_*
|
|
*/
|
|
int capabilities;
|
|
|
|
struct AVHWAccel *next;
|
|
|
|
/**
|
|
* Called at the beginning of each frame or field picture.
|
|
*
|
|
* Meaningful frame information (codec specific) is guaranteed to
|
|
* be parsed at this point. This function is mandatory.
|
|
*
|
|
* Note that buf can be NULL along with buf_size set to 0.
|
|
* Otherwise, this means the whole frame is available at this point.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param buf the frame data buffer base
|
|
* @param buf_size the size of the frame in bytes
|
|
* @return zero if successful, a negative value otherwise
|
|
*/
|
|
int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
|
|
|
|
/**
|
|
* Callback for each slice.
|
|
*
|
|
* Meaningful slice information (codec specific) is guaranteed to
|
|
* be parsed at this point. This function is mandatory.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param buf the slice data buffer base
|
|
* @param buf_size the size of the slice in bytes
|
|
* @return zero if successful, a negative value otherwise
|
|
*/
|
|
int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
|
|
|
|
/**
|
|
* Called at the end of each frame or field picture.
|
|
*
|
|
* The whole picture is parsed at this point and can now be sent
|
|
* to the hardware accelerator. This function is mandatory.
|
|
*
|
|
* @param avctx the codec context
|
|
* @return zero if successful, a negative value otherwise
|
|
*/
|
|
int (*end_frame)(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Size of HW accelerator private data.
|
|
*
|
|
* Private data is allocated with av_mallocz() before
|
|
* AVCodecContext.get_buffer() and deallocated after
|
|
* AVCodecContext.release_buffer().
|
|
*/
|
|
int priv_data_size;
|
|
} AVHWAccel;
|
|
|
|
/**
|
|
* @defgroup lavc_picture AVPicture
|
|
*
|
|
* Functions for working with AVPicture
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* four components are given, that's all.
|
|
* the last component is alpha
|
|
*/
|
|
typedef struct AVPicture {
|
|
uint8_t *data[AV_NUM_DATA_POINTERS];
|
|
int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
|
|
} AVPicture;
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#define AVPALETTE_SIZE 1024
|
|
#define AVPALETTE_COUNT 256
|
|
|
|
enum AVSubtitleType {
|
|
SUBTITLE_NONE,
|
|
|
|
SUBTITLE_BITMAP, ///< A bitmap, pict will be set
|
|
|
|
/**
|
|
* Plain text, the text field must be set by the decoder and is
|
|
* authoritative. ass and pict fields may contain approximations.
|
|
*/
|
|
SUBTITLE_TEXT,
|
|
|
|
/**
|
|
* Formatted text, the ass field must be set by the decoder and is
|
|
* authoritative. pict and text fields may contain approximations.
|
|
*/
|
|
SUBTITLE_ASS,
|
|
};
|
|
|
|
#define AV_SUBTITLE_FLAG_FORCED 0x00000001
|
|
|
|
typedef struct AVSubtitleRect {
|
|
int x; ///< top left corner of pict, undefined when pict is not set
|
|
int y; ///< top left corner of pict, undefined when pict is not set
|
|
int w; ///< width of pict, undefined when pict is not set
|
|
int h; ///< height of pict, undefined when pict is not set
|
|
int nb_colors; ///< number of colors in pict, undefined when pict is not set
|
|
|
|
/**
|
|
* data+linesize for the bitmap of this subtitle.
|
|
* can be set for text/ass as well once they where rendered
|
|
*/
|
|
AVPicture pict;
|
|
enum AVSubtitleType type;
|
|
|
|
char *text; ///< 0 terminated plain UTF-8 text
|
|
|
|
/**
|
|
* 0 terminated ASS/SSA compatible event line.
|
|
* The pressentation of this is unaffected by the other values in this
|
|
* struct.
|
|
*/
|
|
char *ass;
|
|
int flags;
|
|
} AVSubtitleRect;
|
|
|
|
typedef struct AVSubtitle {
|
|
uint16_t format; /* 0 = graphics */
|
|
uint32_t start_display_time; /* relative to packet pts, in ms */
|
|
uint32_t end_display_time; /* relative to packet pts, in ms */
|
|
unsigned num_rects;
|
|
AVSubtitleRect **rects;
|
|
int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
|
|
} AVSubtitle;
|
|
|
|
/**
|
|
* If c is NULL, returns the first registered codec,
|
|
* if c is non-NULL, returns the next registered codec after c,
|
|
* or NULL if c is the last one.
|
|
*/
|
|
AVCodec *av_codec_next(const AVCodec *c);
|
|
|
|
/**
|
|
* Return the LIBAVCODEC_VERSION_INT constant.
|
|
*/
|
|
unsigned avcodec_version(void);
|
|
|
|
/**
|
|
* Return the libavcodec build-time configuration.
|
|
*/
|
|
const char *avcodec_configuration(void);
|
|
|
|
/**
|
|
* Return the libavcodec license.
|
|
*/
|
|
const char *avcodec_license(void);
|
|
|
|
/**
|
|
* Register the codec codec and initialize libavcodec.
|
|
*
|
|
* @warning either this function or avcodec_register_all() must be called
|
|
* before any other libavcodec functions.
|
|
*
|
|
* @see avcodec_register_all()
|
|
*/
|
|
void avcodec_register(AVCodec *codec);
|
|
|
|
/**
|
|
* Register all the codecs, parsers and bitstream filters which were enabled at
|
|
* configuration time. If you do not call this function you can select exactly
|
|
* which formats you want to support, by using the individual registration
|
|
* functions.
|
|
*
|
|
* @see avcodec_register
|
|
* @see av_register_codec_parser
|
|
* @see av_register_bitstream_filter
|
|
*/
|
|
void avcodec_register_all(void);
|
|
|
|
/**
|
|
* Allocate an AVCodecContext and set its fields to default values. The
|
|
* resulting struct can be deallocated by calling avcodec_close() on it followed
|
|
* by av_free().
|
|
*
|
|
* @param codec if non-NULL, allocate private data and initialize defaults
|
|
* for the given codec. It is illegal to then call avcodec_open2()
|
|
* with a different codec.
|
|
* If NULL, then the codec-specific defaults won't be initialized,
|
|
* which may result in suboptimal default settings (this is
|
|
* important mainly for encoders, e.g. libx264).
|
|
*
|
|
* @return An AVCodecContext filled with default values or NULL on failure.
|
|
* @see avcodec_get_context_defaults
|
|
*/
|
|
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
|
|
|
|
/**
|
|
* Set the fields of the given AVCodecContext to default values corresponding
|
|
* to the given codec (defaults may be codec-dependent).
|
|
*
|
|
* Do not call this function if a non-NULL codec has been passed
|
|
* to avcodec_alloc_context3() that allocated this AVCodecContext.
|
|
* If codec is non-NULL, it is illegal to call avcodec_open2() with a
|
|
* different codec on this AVCodecContext.
|
|
*/
|
|
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
|
|
|
|
/**
|
|
* Get the AVClass for AVCodecContext. It can be used in combination with
|
|
* AV_OPT_SEARCH_FAKE_OBJ for examining options.
|
|
*
|
|
* @see av_opt_find().
|
|
*/
|
|
const AVClass *avcodec_get_class(void);
|
|
|
|
/**
|
|
* Copy the settings of the source AVCodecContext into the destination
|
|
* AVCodecContext. The resulting destination codec context will be
|
|
* unopened, i.e. you are required to call avcodec_open2() before you
|
|
* can use this AVCodecContext to decode/encode video/audio data.
|
|
*
|
|
* @param dest target codec context, should be initialized with
|
|
* avcodec_alloc_context3(), but otherwise uninitialized
|
|
* @param src source codec context
|
|
* @return AVERROR() on error (e.g. memory allocation error), 0 on success
|
|
*/
|
|
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
|
|
|
|
/**
|
|
* Allocate an AVFrame and set its fields to default values. The resulting
|
|
* struct must be freed using avcodec_free_frame().
|
|
*
|
|
* @return An AVFrame filled with default values or NULL on failure.
|
|
* @see avcodec_get_frame_defaults
|
|
*/
|
|
AVFrame *avcodec_alloc_frame(void);
|
|
|
|
/**
|
|
* Set the fields of the given AVFrame to default values.
|
|
*
|
|
* @param frame The AVFrame of which the fields should be set to default values.
|
|
*/
|
|
void avcodec_get_frame_defaults(AVFrame *frame);
|
|
|
|
/**
|
|
* Free the frame and any dynamically allocated objects in it,
|
|
* e.g. extended_data.
|
|
*
|
|
* @param frame frame to be freed. The pointer will be set to NULL.
|
|
*
|
|
* @warning this function does NOT free the data buffers themselves
|
|
* (it does not know how, since they might have been allocated with
|
|
* a custom get_buffer()).
|
|
*/
|
|
void avcodec_free_frame(AVFrame **frame);
|
|
|
|
/**
|
|
* Initialize the AVCodecContext to use the given AVCodec. Prior to using this
|
|
* function the context has to be allocated with avcodec_alloc_context3().
|
|
*
|
|
* The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
|
|
* avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
|
|
* retrieving a codec.
|
|
*
|
|
* @warning This function is not thread safe!
|
|
*
|
|
* @code
|
|
* avcodec_register_all();
|
|
* av_dict_set(&opts, "b", "2.5M", 0);
|
|
* codec = avcodec_find_decoder(AV_CODEC_ID_H264);
|
|
* if (!codec)
|
|
* exit(1);
|
|
*
|
|
* context = avcodec_alloc_context3(codec);
|
|
*
|
|
* if (avcodec_open2(context, codec, opts) < 0)
|
|
* exit(1);
|
|
* @endcode
|
|
*
|
|
* @param avctx The context to initialize.
|
|
* @param codec The codec to open this context for. If a non-NULL codec has been
|
|
* previously passed to avcodec_alloc_context3() or
|
|
* avcodec_get_context_defaults3() for this context, then this
|
|
* parameter MUST be either NULL or equal to the previously passed
|
|
* codec.
|
|
* @param options A dictionary filled with AVCodecContext and codec-private options.
|
|
* On return this object will be filled with options that were not found.
|
|
*
|
|
* @return zero on success, a negative value on error
|
|
* @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
|
|
* av_dict_set(), av_opt_find().
|
|
*/
|
|
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
|
|
|
|
/**
|
|
* Close a given AVCodecContext and free all the data associated with it
|
|
* (but not the AVCodecContext itself).
|
|
*
|
|
* Calling this function on an AVCodecContext that hasn't been opened will free
|
|
* the codec-specific data allocated in avcodec_alloc_context3() /
|
|
* avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
|
|
* do nothing.
|
|
*/
|
|
int avcodec_close(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Free all allocated data in the given subtitle struct.
|
|
*
|
|
* @param sub AVSubtitle to free.
|
|
*/
|
|
void avsubtitle_free(AVSubtitle *sub);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavc_packet
|
|
* @{
|
|
*/
|
|
|
|
#if FF_API_DESTRUCT_PACKET
|
|
/**
|
|
* Default packet destructor.
|
|
* @deprecated use the AVBuffer API instead
|
|
*/
|
|
attribute_deprecated
|
|
void av_destruct_packet(AVPacket *pkt);
|
|
#endif
|
|
|
|
/**
|
|
* Initialize optional fields of a packet with default values.
|
|
*
|
|
* Note, this does not touch the data and size members, which have to be
|
|
* initialized separately.
|
|
*
|
|
* @param pkt packet
|
|
*/
|
|
void av_init_packet(AVPacket *pkt);
|
|
|
|
/**
|
|
* Allocate the payload of a packet and initialize its fields with
|
|
* default values.
|
|
*
|
|
* @param pkt packet
|
|
* @param size wanted payload size
|
|
* @return 0 if OK, AVERROR_xxx otherwise
|
|
*/
|
|
int av_new_packet(AVPacket *pkt, int size);
|
|
|
|
/**
|
|
* Reduce packet size, correctly zeroing padding
|
|
*
|
|
* @param pkt packet
|
|
* @param size new size
|
|
*/
|
|
void av_shrink_packet(AVPacket *pkt, int size);
|
|
|
|
/**
|
|
* Increase packet size, correctly zeroing padding
|
|
*
|
|
* @param pkt packet
|
|
* @param grow_by number of bytes by which to increase the size of the packet
|
|
*/
|
|
int av_grow_packet(AVPacket *pkt, int grow_by);
|
|
|
|
/**
|
|
* Initialize a reference-counted packet from av_malloc()ed data.
|
|
*
|
|
* @param pkt packet to be initialized. This function will set the data, size,
|
|
* buf and destruct fields, all others are left untouched.
|
|
* @param data Data allocated by av_malloc() to be used as packet data. If this
|
|
* function returns successfully, the data is owned by the underlying AVBuffer.
|
|
* The caller may not access the data through other means.
|
|
* @param size size of data in bytes, without the padding. I.e. the full buffer
|
|
* size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE.
|
|
*
|
|
* @return 0 on success, a negative AVERROR on error
|
|
*/
|
|
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
|
|
|
|
/**
|
|
* @warning This is a hack - the packet memory allocation stuff is broken. The
|
|
* packet is allocated if it was not really allocated.
|
|
*/
|
|
int av_dup_packet(AVPacket *pkt);
|
|
|
|
/**
|
|
* Free a packet.
|
|
*
|
|
* @param pkt packet to free
|
|
*/
|
|
void av_free_packet(AVPacket *pkt);
|
|
|
|
/**
|
|
* Allocate new information of a packet.
|
|
*
|
|
* @param pkt packet
|
|
* @param type side information type
|
|
* @param size side information size
|
|
* @return pointer to fresh allocated data or NULL otherwise
|
|
*/
|
|
uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
int size);
|
|
|
|
/**
|
|
* Shrink the already allocated side data buffer
|
|
*
|
|
* @param pkt packet
|
|
* @param type side information type
|
|
* @param size new side information size
|
|
* @return 0 on success, < 0 on failure
|
|
*/
|
|
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
int size);
|
|
|
|
/**
|
|
* Get side information from packet.
|
|
*
|
|
* @param pkt packet
|
|
* @param type desired side information type
|
|
* @param size pointer for side information size to store (optional)
|
|
* @return pointer to data if present or NULL otherwise
|
|
*/
|
|
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
|
|
int *size);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavc_decoding
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Find a registered decoder with a matching codec ID.
|
|
*
|
|
* @param id AVCodecID of the requested decoder
|
|
* @return A decoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_decoder(enum AVCodecID id);
|
|
|
|
/**
|
|
* Find a registered decoder with the specified name.
|
|
*
|
|
* @param name name of the requested decoder
|
|
* @return A decoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_decoder_by_name(const char *name);
|
|
|
|
#if FF_API_GET_BUFFER
|
|
attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
|
|
attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
|
|
attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
|
|
#endif
|
|
|
|
/**
|
|
* The default callback for AVCodecContext.get_buffer2(). It is made public so
|
|
* it can be called by custom get_buffer2() implementations for decoders without
|
|
* CODEC_CAP_DR1 set.
|
|
*/
|
|
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags);
|
|
|
|
/**
|
|
* Return the amount of padding in pixels which the get_buffer callback must
|
|
* provide around the edge of the image for codecs which do not have the
|
|
* CODEC_FLAG_EMU_EDGE flag.
|
|
*
|
|
* @return Required padding in pixels.
|
|
*/
|
|
unsigned avcodec_get_edge_width(void);
|
|
|
|
/**
|
|
* Modify width and height values so that they will result in a memory
|
|
* buffer that is acceptable for the codec if you do not use any horizontal
|
|
* padding.
|
|
*
|
|
* May only be used if a codec with CODEC_CAP_DR1 has been opened.
|
|
* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
|
|
* according to avcodec_get_edge_width() before.
|
|
*/
|
|
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
|
|
|
|
/**
|
|
* Modify width and height values so that they will result in a memory
|
|
* buffer that is acceptable for the codec if you also ensure that all
|
|
* line sizes are a multiple of the respective linesize_align[i].
|
|
*
|
|
* May only be used if a codec with CODEC_CAP_DR1 has been opened.
|
|
* If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
|
|
* according to avcodec_get_edge_width() before.
|
|
*/
|
|
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
|
|
int linesize_align[AV_NUM_DATA_POINTERS]);
|
|
|
|
/**
|
|
* Decode the audio frame of size avpkt->size from avpkt->data into frame.
|
|
*
|
|
* Some decoders may support multiple frames in a single AVPacket. Such
|
|
* decoders would then just decode the first frame. In this case,
|
|
* avcodec_decode_audio4 has to be called again with an AVPacket containing
|
|
* the remaining data in order to decode the second frame, etc...
|
|
* Even if no frames are returned, the packet needs to be fed to the decoder
|
|
* with remaining data until it is completely consumed or an error occurs.
|
|
*
|
|
* @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE
|
|
* larger than the actual read bytes because some optimized bitstream
|
|
* readers read 32 or 64 bits at once and could read over the end.
|
|
*
|
|
* @note You might have to align the input buffer. The alignment requirements
|
|
* depend on the CPU and the decoder.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param[out] frame The AVFrame in which to store decoded audio samples.
|
|
* The decoder will allocate a buffer for the decoded frame by
|
|
* calling the AVCodecContext.get_buffer2() callback.
|
|
* When AVCodecContext.refcounted_frames is set to 1, the frame is
|
|
* reference counted and the returned reference belongs to the
|
|
* caller. The caller must release the frame using av_frame_unref()
|
|
* when the frame is no longer needed. The caller may safely write
|
|
* to the frame if av_frame_is_writable() returns 1.
|
|
* When AVCodecContext.refcounted_frames is set to 0, the returned
|
|
* reference belongs to the decoder and is valid only until the
|
|
* next call to this function or until closing the decoder.
|
|
* The caller may not write to it.
|
|
* @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
|
|
* non-zero.
|
|
* @param[in] avpkt The input AVPacket containing the input buffer.
|
|
* At least avpkt->data and avpkt->size should be set. Some
|
|
* decoders might also require additional fields to be set.
|
|
* @return A negative error code is returned if an error occurred during
|
|
* decoding, otherwise the number of bytes consumed from the input
|
|
* AVPacket is returned.
|
|
*/
|
|
int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
|
|
int *got_frame_ptr, AVPacket *avpkt);
|
|
|
|
/**
|
|
* Decode the video frame of size avpkt->size from avpkt->data into picture.
|
|
* Some decoders may support multiple frames in a single AVPacket, such
|
|
* decoders would then just decode the first frame.
|
|
*
|
|
* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
|
|
* the actual read bytes because some optimized bitstream readers read 32 or 64
|
|
* bits at once and could read over the end.
|
|
*
|
|
* @warning The end of the input buffer buf should be set to 0 to ensure that
|
|
* no overreading happens for damaged MPEG streams.
|
|
*
|
|
* @note You might have to align the input buffer avpkt->data.
|
|
* The alignment requirements depend on the CPU: on some CPUs it isn't
|
|
* necessary at all, on others it won't work at all if not aligned and on others
|
|
* it will work but it will have an impact on performance.
|
|
*
|
|
* In practice, avpkt->data should have 4 byte alignment at minimum.
|
|
*
|
|
* @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
|
|
* between input and output, these need to be fed with avpkt->data=NULL,
|
|
* avpkt->size=0 at the end to return the remaining frames.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
|
|
* Use av_frame_alloc() to get an AVFrame. The codec will
|
|
* allocate memory for the actual bitmap by calling the
|
|
* AVCodecContext.get_buffer2() callback.
|
|
* When AVCodecContext.refcounted_frames is set to 1, the frame is
|
|
* reference counted and the returned reference belongs to the
|
|
* caller. The caller must release the frame using av_frame_unref()
|
|
* when the frame is no longer needed. The caller may safely write
|
|
* to the frame if av_frame_is_writable() returns 1.
|
|
* When AVCodecContext.refcounted_frames is set to 0, the returned
|
|
* reference belongs to the decoder and is valid only until the
|
|
* next call to this function or until closing the decoder. The
|
|
* caller may not write to it.
|
|
*
|
|
* @param[in] avpkt The input AVpacket containing the input buffer.
|
|
* You can create such packet with av_init_packet() and by then setting
|
|
* data and size, some decoders might in addition need other fields like
|
|
* flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
|
|
* fields possible.
|
|
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
|
|
* @return On error a negative value is returned, otherwise the number of bytes
|
|
* used or zero if no frame could be decompressed.
|
|
*/
|
|
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
|
|
int *got_picture_ptr,
|
|
AVPacket *avpkt);
|
|
|
|
/**
|
|
* Decode a subtitle message.
|
|
* Return a negative value on error, otherwise return the number of bytes used.
|
|
* If no subtitle could be decompressed, got_sub_ptr is zero.
|
|
* Otherwise, the subtitle is stored in *sub.
|
|
* Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
|
|
* simplicity, because the performance difference is expect to be negligible
|
|
* and reusing a get_buffer written for video codecs would probably perform badly
|
|
* due to a potentially very different allocation pattern.
|
|
*
|
|
* @param avctx the codec context
|
|
* @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
|
|
freed with avsubtitle_free if *got_sub_ptr is set.
|
|
* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
|
|
* @param[in] avpkt The input AVPacket containing the input buffer.
|
|
*/
|
|
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
|
|
int *got_sub_ptr,
|
|
AVPacket *avpkt);
|
|
|
|
/**
|
|
* @defgroup lavc_parsing Frame parsing
|
|
* @{
|
|
*/
|
|
|
|
enum AVPictureStructure {
|
|
AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown
|
|
AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field
|
|
AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field
|
|
AV_PICTURE_STRUCTURE_FRAME, //< coded as frame
|
|
};
|
|
|
|
typedef struct AVCodecParserContext {
|
|
void *priv_data;
|
|
struct AVCodecParser *parser;
|
|
int64_t frame_offset; /* offset of the current frame */
|
|
int64_t cur_offset; /* current offset
|
|
(incremented by each av_parser_parse()) */
|
|
int64_t next_frame_offset; /* offset of the next frame */
|
|
/* video info */
|
|
int pict_type; /* XXX: Put it back in AVCodecContext. */
|
|
/**
|
|
* This field is used for proper frame duration computation in lavf.
|
|
* It signals, how much longer the frame duration of the current frame
|
|
* is compared to normal frame duration.
|
|
*
|
|
* frame_duration = (1 + repeat_pict) * time_base
|
|
*
|
|
* It is used by codecs like H.264 to display telecined material.
|
|
*/
|
|
int repeat_pict; /* XXX: Put it back in AVCodecContext. */
|
|
int64_t pts; /* pts of the current frame */
|
|
int64_t dts; /* dts of the current frame */
|
|
|
|
/* private data */
|
|
int64_t last_pts;
|
|
int64_t last_dts;
|
|
int fetch_timestamp;
|
|
|
|
#define AV_PARSER_PTS_NB 4
|
|
int cur_frame_start_index;
|
|
int64_t cur_frame_offset[AV_PARSER_PTS_NB];
|
|
int64_t cur_frame_pts[AV_PARSER_PTS_NB];
|
|
int64_t cur_frame_dts[AV_PARSER_PTS_NB];
|
|
|
|
int flags;
|
|
#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
|
|
#define PARSER_FLAG_ONCE 0x0002
|
|
/// Set if the parser has a valid file offset
|
|
#define PARSER_FLAG_FETCHED_OFFSET 0x0004
|
|
|
|
int64_t offset; ///< byte offset from starting packet start
|
|
int64_t cur_frame_end[AV_PARSER_PTS_NB];
|
|
|
|
/**
|
|
* Set by parser to 1 for key frames and 0 for non-key frames.
|
|
* It is initialized to -1, so if the parser doesn't set this flag,
|
|
* old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
|
|
* will be used.
|
|
*/
|
|
int key_frame;
|
|
|
|
/**
|
|
* Time difference in stream time base units from the pts of this
|
|
* packet to the point at which the output from the decoder has converged
|
|
* independent from the availability of previous frames. That is, the
|
|
* frames are virtually identical no matter if decoding started from
|
|
* the very first frame or from this keyframe.
|
|
* Is AV_NOPTS_VALUE if unknown.
|
|
* This field is not the display duration of the current frame.
|
|
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
|
|
* set.
|
|
*
|
|
* The purpose of this field is to allow seeking in streams that have no
|
|
* keyframes in the conventional sense. It corresponds to the
|
|
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
|
|
* essential for some types of subtitle streams to ensure that all
|
|
* subtitles are correctly displayed after seeking.
|
|
*/
|
|
int64_t convergence_duration;
|
|
|
|
// Timestamp generation support:
|
|
/**
|
|
* Synchronization point for start of timestamp generation.
|
|
*
|
|
* Set to >0 for sync point, 0 for no sync point and <0 for undefined
|
|
* (default).
|
|
*
|
|
* For example, this corresponds to presence of H.264 buffering period
|
|
* SEI message.
|
|
*/
|
|
int dts_sync_point;
|
|
|
|
/**
|
|
* Offset of the current timestamp against last timestamp sync point in
|
|
* units of AVCodecContext.time_base.
|
|
*
|
|
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
|
|
* contain a valid timestamp offset.
|
|
*
|
|
* Note that the timestamp of sync point has usually a nonzero
|
|
* dts_ref_dts_delta, which refers to the previous sync point. Offset of
|
|
* the next frame after timestamp sync point will be usually 1.
|
|
*
|
|
* For example, this corresponds to H.264 cpb_removal_delay.
|
|
*/
|
|
int dts_ref_dts_delta;
|
|
|
|
/**
|
|
* Presentation delay of current frame in units of AVCodecContext.time_base.
|
|
*
|
|
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
|
|
* contain valid non-negative timestamp delta (presentation time of a frame
|
|
* must not lie in the past).
|
|
*
|
|
* This delay represents the difference between decoding and presentation
|
|
* time of the frame.
|
|
*
|
|
* For example, this corresponds to H.264 dpb_output_delay.
|
|
*/
|
|
int pts_dts_delta;
|
|
|
|
/**
|
|
* Position of the packet in file.
|
|
*
|
|
* Analogous to cur_frame_pts/dts
|
|
*/
|
|
int64_t cur_frame_pos[AV_PARSER_PTS_NB];
|
|
|
|
/**
|
|
* Byte position of currently parsed frame in stream.
|
|
*/
|
|
int64_t pos;
|
|
|
|
/**
|
|
* Previous frame byte position.
|
|
*/
|
|
int64_t last_pos;
|
|
|
|
/**
|
|
* Duration of the current frame.
|
|
* For audio, this is in units of 1 / AVCodecContext.sample_rate.
|
|
* For all other types, this is in units of AVCodecContext.time_base.
|
|
*/
|
|
int duration;
|
|
|
|
enum AVFieldOrder field_order;
|
|
|
|
/**
|
|
* Indicate whether a picture is coded as a frame, top field or bottom field.
|
|
*
|
|
* For example, H.264 field_pic_flag equal to 0 corresponds to
|
|
* AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
|
|
* equal to 1 and bottom_field_flag equal to 0 corresponds to
|
|
* AV_PICTURE_STRUCTURE_TOP_FIELD.
|
|
*/
|
|
enum AVPictureStructure picture_structure;
|
|
} AVCodecParserContext;
|
|
|
|
typedef struct AVCodecParser {
|
|
int codec_ids[5]; /* several codec IDs are permitted */
|
|
int priv_data_size;
|
|
int (*parser_init)(AVCodecParserContext *s);
|
|
int (*parser_parse)(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size);
|
|
void (*parser_close)(AVCodecParserContext *s);
|
|
int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
|
|
struct AVCodecParser *next;
|
|
} AVCodecParser;
|
|
|
|
AVCodecParser *av_parser_next(AVCodecParser *c);
|
|
|
|
void av_register_codec_parser(AVCodecParser *parser);
|
|
AVCodecParserContext *av_parser_init(int codec_id);
|
|
|
|
/**
|
|
* Parse a packet.
|
|
*
|
|
* @param s parser context.
|
|
* @param avctx codec context.
|
|
* @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
|
|
* @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
|
|
* @param buf input buffer.
|
|
* @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
|
|
* @param pts input presentation timestamp.
|
|
* @param dts input decoding timestamp.
|
|
* @param pos input byte position in stream.
|
|
* @return the number of bytes of the input bitstream used.
|
|
*
|
|
* Example:
|
|
* @code
|
|
* while(in_len){
|
|
* len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
|
|
* in_data, in_len,
|
|
* pts, dts, pos);
|
|
* in_data += len;
|
|
* in_len -= len;
|
|
*
|
|
* if(size)
|
|
* decode_frame(data, size);
|
|
* }
|
|
* @endcode
|
|
*/
|
|
int av_parser_parse2(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size,
|
|
int64_t pts, int64_t dts,
|
|
int64_t pos);
|
|
|
|
/**
|
|
* @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
|
|
* @deprecated use AVBitstreamFilter
|
|
*/
|
|
int av_parser_change(AVCodecParserContext *s,
|
|
AVCodecContext *avctx,
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size, int keyframe);
|
|
void av_parser_close(AVCodecParserContext *s);
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavc_encoding
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Find a registered encoder with a matching codec ID.
|
|
*
|
|
* @param id AVCodecID of the requested encoder
|
|
* @return An encoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_encoder(enum AVCodecID id);
|
|
|
|
/**
|
|
* Find a registered encoder with the specified name.
|
|
*
|
|
* @param name name of the requested encoder
|
|
* @return An encoder if one was found, NULL otherwise.
|
|
*/
|
|
AVCodec *avcodec_find_encoder_by_name(const char *name);
|
|
|
|
/**
|
|
* Encode a frame of audio.
|
|
*
|
|
* Takes input samples from frame and writes the next output packet, if
|
|
* available, to avpkt. The output packet does not necessarily contain data for
|
|
* the most recent frame, as encoders can delay, split, and combine input frames
|
|
* internally as needed.
|
|
*
|
|
* @param avctx codec context
|
|
* @param avpkt output AVPacket.
|
|
* The user can supply an output buffer by setting
|
|
* avpkt->data and avpkt->size prior to calling the
|
|
* function, but if the size of the user-provided data is not
|
|
* large enough, encoding will fail. All other AVPacket fields
|
|
* will be reset by the encoder using av_init_packet(). If
|
|
* avpkt->data is NULL, the encoder will allocate it.
|
|
* The encoder will set avpkt->size to the size of the
|
|
* output packet.
|
|
*
|
|
* If this function fails or produces no output, avpkt will be
|
|
* freed using av_free_packet() (i.e. avpkt->destruct will be
|
|
* called to free the user supplied buffer).
|
|
* @param[in] frame AVFrame containing the raw audio data to be encoded.
|
|
* May be NULL when flushing an encoder that has the
|
|
* CODEC_CAP_DELAY capability set.
|
|
* If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
|
|
* can have any number of samples.
|
|
* If it is not set, frame->nb_samples must be equal to
|
|
* avctx->frame_size for all frames except the last.
|
|
* The final frame may be smaller than avctx->frame_size.
|
|
* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
|
|
* output packet is non-empty, and to 0 if it is
|
|
* empty. If the function returns an error, the
|
|
* packet can be assumed to be invalid, and the
|
|
* value of got_packet_ptr is undefined and should
|
|
* not be used.
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr);
|
|
|
|
/**
|
|
* Encode a frame of video.
|
|
*
|
|
* Takes input raw video data from frame and writes the next output packet, if
|
|
* available, to avpkt. The output packet does not necessarily contain data for
|
|
* the most recent frame, as encoders can delay and reorder input frames
|
|
* internally as needed.
|
|
*
|
|
* @param avctx codec context
|
|
* @param avpkt output AVPacket.
|
|
* The user can supply an output buffer by setting
|
|
* avpkt->data and avpkt->size prior to calling the
|
|
* function, but if the size of the user-provided data is not
|
|
* large enough, encoding will fail. All other AVPacket fields
|
|
* will be reset by the encoder using av_init_packet(). If
|
|
* avpkt->data is NULL, the encoder will allocate it.
|
|
* The encoder will set avpkt->size to the size of the
|
|
* output packet. The returned data (if any) belongs to the
|
|
* caller, he is responsible for freeing it.
|
|
*
|
|
* If this function fails or produces no output, avpkt will be
|
|
* freed using av_free_packet() (i.e. avpkt->destruct will be
|
|
* called to free the user supplied buffer).
|
|
* @param[in] frame AVFrame containing the raw video data to be encoded.
|
|
* May be NULL when flushing an encoder that has the
|
|
* CODEC_CAP_DELAY capability set.
|
|
* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
|
|
* output packet is non-empty, and to 0 if it is
|
|
* empty. If the function returns an error, the
|
|
* packet can be assumed to be invalid, and the
|
|
* value of got_packet_ptr is undefined and should
|
|
* not be used.
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr);
|
|
|
|
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
|
|
const AVSubtitle *sub);
|
|
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavc_picture
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Allocate memory for a picture. Call avpicture_free() to free it.
|
|
*
|
|
* @see avpicture_fill()
|
|
*
|
|
* @param picture the picture to be filled in
|
|
* @param pix_fmt the format of the picture
|
|
* @param width the width of the picture
|
|
* @param height the height of the picture
|
|
* @return zero if successful, a negative value if not
|
|
*/
|
|
int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* Free a picture previously allocated by avpicture_alloc().
|
|
* The data buffer used by the AVPicture is freed, but the AVPicture structure
|
|
* itself is not.
|
|
*
|
|
* @param picture the AVPicture to be freed
|
|
*/
|
|
void avpicture_free(AVPicture *picture);
|
|
|
|
/**
|
|
* Fill in the AVPicture fields.
|
|
* The fields of the given AVPicture are filled in by using the 'ptr' address
|
|
* which points to the image data buffer. Depending on the specified picture
|
|
* format, one or multiple image data pointers and line sizes will be set.
|
|
* If a planar format is specified, several pointers will be set pointing to
|
|
* the different picture planes and the line sizes of the different planes
|
|
* will be stored in the lines_sizes array.
|
|
* Call with ptr == NULL to get the required size for the ptr buffer.
|
|
*
|
|
* To allocate the buffer and fill in the AVPicture fields in one call,
|
|
* use avpicture_alloc().
|
|
*
|
|
* @param picture AVPicture whose fields are to be filled in
|
|
* @param ptr Buffer which will contain or contains the actual image data
|
|
* @param pix_fmt The format in which the picture data is stored.
|
|
* @param width the width of the image in pixels
|
|
* @param height the height of the image in pixels
|
|
* @return size of the image data in bytes
|
|
*/
|
|
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
|
|
enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* Copy pixel data from an AVPicture into a buffer.
|
|
* The data is stored compactly, without any gaps for alignment or padding
|
|
* which may be applied by avpicture_fill().
|
|
*
|
|
* @see avpicture_get_size()
|
|
*
|
|
* @param[in] src AVPicture containing image data
|
|
* @param[in] pix_fmt The format in which the picture data is stored.
|
|
* @param[in] width the width of the image in pixels.
|
|
* @param[in] height the height of the image in pixels.
|
|
* @param[out] dest A buffer into which picture data will be copied.
|
|
* @param[in] dest_size The size of 'dest'.
|
|
* @return The number of bytes written to dest, or a negative value (error code) on error.
|
|
*/
|
|
int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
|
|
int width, int height,
|
|
unsigned char *dest, int dest_size);
|
|
|
|
/**
|
|
* Calculate the size in bytes that a picture of the given width and height
|
|
* would occupy if stored in the given picture format.
|
|
* Note that this returns the size of a compact representation as generated
|
|
* by avpicture_layout(), which can be smaller than the size required for e.g.
|
|
* avpicture_fill().
|
|
*
|
|
* @param pix_fmt the given picture format
|
|
* @param width the width of the image
|
|
* @param height the height of the image
|
|
* @return Image data size in bytes or -1 on error (e.g. too large dimensions).
|
|
*/
|
|
int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
|
#if FF_API_DEINTERLACE
|
|
/**
|
|
* deinterlace - if not supported return -1
|
|
*
|
|
* @deprecated - use yadif (in libavfilter) instead
|
|
*/
|
|
attribute_deprecated
|
|
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
|
|
enum AVPixelFormat pix_fmt, int width, int height);
|
|
#endif
|
|
/**
|
|
* Copy image src to dst. Wraps av_picture_data_copy() above.
|
|
*/
|
|
void av_picture_copy(AVPicture *dst, const AVPicture *src,
|
|
enum AVPixelFormat pix_fmt, int width, int height);
|
|
|
|
/**
|
|
* Crop image top and left side.
|
|
*/
|
|
int av_picture_crop(AVPicture *dst, const AVPicture *src,
|
|
enum AVPixelFormat pix_fmt, int top_band, int left_band);
|
|
|
|
/**
|
|
* Pad image.
|
|
*/
|
|
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
|
|
int padtop, int padbottom, int padleft, int padright, int *color);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @defgroup lavc_misc Utility functions
|
|
* @ingroup libavc
|
|
*
|
|
* Miscellaneous utility functions related to both encoding and decoding
|
|
* (or neither).
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @defgroup lavc_misc_pixfmt Pixel formats
|
|
*
|
|
* Functions for working with pixel formats.
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @deprecated Use av_pix_fmt_get_chroma_sub_sample
|
|
*/
|
|
|
|
void attribute_deprecated avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
|
|
|
|
/**
|
|
* Return a value representing the fourCC code associated to the
|
|
* pixel format pix_fmt, or 0 if no associated fourCC code can be
|
|
* found.
|
|
*/
|
|
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
|
|
|
|
#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
|
|
#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
|
|
#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
|
|
#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
|
|
#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
|
|
#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
|
|
|
|
/**
|
|
* Compute what kind of losses will occur when converting from one specific
|
|
* pixel format to another.
|
|
* When converting from one pixel format to another, information loss may occur.
|
|
* For example, when converting from RGB24 to GRAY, the color information will
|
|
* be lost. Similarly, other losses occur when converting from some formats to
|
|
* other formats. These losses can involve loss of chroma, but also loss of
|
|
* resolution, loss of color depth, loss due to the color space conversion, loss
|
|
* of the alpha bits or loss due to color quantization.
|
|
* avcodec_get_fix_fmt_loss() informs you about the various types of losses
|
|
* which will occur when converting from one pixel format to another.
|
|
*
|
|
* @param[in] dst_pix_fmt destination pixel format
|
|
* @param[in] src_pix_fmt source pixel format
|
|
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
|
|
* @return Combination of flags informing you what kind of losses will occur.
|
|
*/
|
|
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
|
|
int has_alpha);
|
|
|
|
/**
|
|
* Find the best pixel format to convert to given a certain source pixel
|
|
* format. When converting from one pixel format to another, information loss
|
|
* may occur. For example, when converting from RGB24 to GRAY, the color
|
|
* information will be lost. Similarly, other losses occur when converting from
|
|
* some formats to other formats. avcodec_find_best_pix_fmt2() searches which of
|
|
* the given pixel formats should be used to suffer the least amount of loss.
|
|
* The pixel formats from which it chooses one, are determined by the
|
|
* pix_fmt_list parameter.
|
|
*
|
|
*
|
|
* @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
|
|
* @param[in] src_pix_fmt source pixel format
|
|
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
|
|
* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
|
|
* @return The best pixel format to convert to or -1 if none was found.
|
|
*/
|
|
enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
|
|
enum AVPixelFormat src_pix_fmt,
|
|
int has_alpha, int *loss_ptr);
|
|
|
|
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
|
|
|
|
/**
|
|
* Put a string representing the codec tag codec_tag in buf.
|
|
*
|
|
* @param buf_size size in bytes of buf
|
|
* @return the length of the string that would have been generated if
|
|
* enough space had been available, excluding the trailing null
|
|
*/
|
|
size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
|
|
|
|
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
|
|
|
|
/**
|
|
* Return a name for the specified profile, if available.
|
|
*
|
|
* @param codec the codec that is searched for the given profile
|
|
* @param profile the profile value for which a name is requested
|
|
* @return A name for the profile if found, NULL otherwise.
|
|
*/
|
|
const char *av_get_profile_name(const AVCodec *codec, int profile);
|
|
|
|
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
|
|
int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
|
|
//FIXME func typedef
|
|
|
|
/**
|
|
* Fill audio frame data and linesize.
|
|
* AVFrame extended_data channel pointers are allocated if necessary for
|
|
* planar audio.
|
|
*
|
|
* @param frame the AVFrame
|
|
* frame->nb_samples must be set prior to calling the
|
|
* function. This function fills in frame->data,
|
|
* frame->extended_data, frame->linesize[0].
|
|
* @param nb_channels channel count
|
|
* @param sample_fmt sample format
|
|
* @param buf buffer to use for frame data
|
|
* @param buf_size size of buffer
|
|
* @param align plane size sample alignment (0 = default)
|
|
* @return 0 on success, negative error code on failure
|
|
*/
|
|
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
|
|
enum AVSampleFormat sample_fmt, const uint8_t *buf,
|
|
int buf_size, int align);
|
|
|
|
/**
|
|
* Flush buffers, should be called when seeking or when switching to a different stream.
|
|
*/
|
|
void avcodec_flush_buffers(AVCodecContext *avctx);
|
|
|
|
/**
|
|
* Return codec bits per sample.
|
|
*
|
|
* @param[in] codec_id the codec
|
|
* @return Number of bits per sample or zero if unknown for the given codec.
|
|
*/
|
|
int av_get_bits_per_sample(enum AVCodecID codec_id);
|
|
|
|
/**
|
|
* Return codec bits per sample.
|
|
* Only return non-zero if the bits per sample is exactly correct, not an
|
|
* approximation.
|
|
*
|
|
* @param[in] codec_id the codec
|
|
* @return Number of bits per sample or zero if unknown for the given codec.
|
|
*/
|
|
int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
|
|
|
|
/**
|
|
* Return audio frame duration.
|
|
*
|
|
* @param avctx codec context
|
|
* @param frame_bytes size of the frame, or 0 if unknown
|
|
* @return frame duration, in samples, if known. 0 if not able to
|
|
* determine.
|
|
*/
|
|
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
|
|
|
|
|
|
typedef struct AVBitStreamFilterContext {
|
|
void *priv_data;
|
|
struct AVBitStreamFilter *filter;
|
|
AVCodecParserContext *parser;
|
|
struct AVBitStreamFilterContext *next;
|
|
} AVBitStreamFilterContext;
|
|
|
|
|
|
typedef struct AVBitStreamFilter {
|
|
const char *name;
|
|
int priv_data_size;
|
|
int (*filter)(AVBitStreamFilterContext *bsfc,
|
|
AVCodecContext *avctx, const char *args,
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size, int keyframe);
|
|
void (*close)(AVBitStreamFilterContext *bsfc);
|
|
struct AVBitStreamFilter *next;
|
|
} AVBitStreamFilter;
|
|
|
|
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
|
|
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
|
|
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
|
|
AVCodecContext *avctx, const char *args,
|
|
uint8_t **poutbuf, int *poutbuf_size,
|
|
const uint8_t *buf, int buf_size, int keyframe);
|
|
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
|
|
|
|
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
|
|
|
|
/* memory */
|
|
|
|
/**
|
|
* Reallocate the given block if it is not large enough, otherwise do nothing.
|
|
*
|
|
* @see av_realloc
|
|
*/
|
|
void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
|
/**
|
|
* Allocate a buffer, reusing the given one if large enough.
|
|
*
|
|
* Contrary to av_fast_realloc the current buffer contents might not be
|
|
* preserved and on error the old buffer is freed, thus no special
|
|
* handling to avoid memleaks is necessary.
|
|
*
|
|
* @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
|
|
* @param size size of the buffer *ptr points to
|
|
* @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
|
|
* *size 0 if an error occurred.
|
|
*/
|
|
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
|
/**
|
|
* Allocate a buffer with padding, reusing the given one if large enough.
|
|
*
|
|
* Same behaviour av_fast_malloc but the buffer has additional
|
|
* FF_INPUT_PADDING_SIZE at the end which will always memset to 0.
|
|
*
|
|
*/
|
|
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
|
|
|
|
/**
|
|
* Encode extradata length to a buffer. Used by xiph codecs.
|
|
*
|
|
* @param s buffer to write to; must be at least (v/255+1) bytes long
|
|
* @param v size of extradata in bytes
|
|
* @return number of bytes written to the buffer.
|
|
*/
|
|
unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
|
|
|
|
#if FF_API_MISSING_SAMPLE
|
|
/**
|
|
* Log a generic warning message about a missing feature. This function is
|
|
* intended to be used internally by Libav (libavcodec, libavformat, etc.)
|
|
* only, and would normally not be used by applications.
|
|
* @param[in] avc a pointer to an arbitrary struct of which the first field is
|
|
* a pointer to an AVClass struct
|
|
* @param[in] feature string containing the name of the missing feature
|
|
* @param[in] want_sample indicates if samples are wanted which exhibit this feature.
|
|
* If want_sample is non-zero, additional verbage will be added to the log
|
|
* message which tells the user how to report samples to the development
|
|
* mailing list.
|
|
* @deprecated Use avpriv_report_missing_feature() instead.
|
|
*/
|
|
attribute_deprecated
|
|
void av_log_missing_feature(void *avc, const char *feature, int want_sample);
|
|
|
|
/**
|
|
* Log a generic warning message asking for a sample. This function is
|
|
* intended to be used internally by Libav (libavcodec, libavformat, etc.)
|
|
* only, and would normally not be used by applications.
|
|
* @param[in] avc a pointer to an arbitrary struct of which the first field is
|
|
* a pointer to an AVClass struct
|
|
* @param[in] msg string containing an optional message, or NULL if no message
|
|
* @deprecated Use avpriv_request_sample() instead.
|
|
*/
|
|
attribute_deprecated
|
|
void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3);
|
|
#endif /* FF_API_MISSING_SAMPLE */
|
|
|
|
/**
|
|
* Register the hardware accelerator hwaccel.
|
|
*/
|
|
void av_register_hwaccel(AVHWAccel *hwaccel);
|
|
|
|
/**
|
|
* If hwaccel is NULL, returns the first registered hardware accelerator,
|
|
* if hwaccel is non-NULL, returns the next registered hardware accelerator
|
|
* after hwaccel, or NULL if hwaccel is the last one.
|
|
*/
|
|
AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
|
|
|
|
|
|
/**
|
|
* Lock operation used by lockmgr
|
|
*/
|
|
enum AVLockOp {
|
|
AV_LOCK_CREATE, ///< Create a mutex
|
|
AV_LOCK_OBTAIN, ///< Lock the mutex
|
|
AV_LOCK_RELEASE, ///< Unlock the mutex
|
|
AV_LOCK_DESTROY, ///< Free mutex resources
|
|
};
|
|
|
|
/**
|
|
* Register a user provided lock manager supporting the operations
|
|
* specified by AVLockOp. mutex points to a (void *) where the
|
|
* lockmgr should store/get a pointer to a user allocated mutex. It's
|
|
* NULL upon AV_LOCK_CREATE and != NULL for all other ops.
|
|
*
|
|
* @param cb User defined callback. Note: Libav may invoke calls to this
|
|
* callback during the call to av_lockmgr_register().
|
|
* Thus, the application must be prepared to handle that.
|
|
* If cb is set to NULL the lockmgr will be unregistered.
|
|
* Also note that during unregistration the previously registered
|
|
* lockmgr callback may also be invoked.
|
|
*/
|
|
int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
|
|
|
|
/**
|
|
* Get the type of the given codec.
|
|
*/
|
|
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
|
|
|
|
/**
|
|
* @return a positive value if s is open (i.e. avcodec_open2() was called on it
|
|
* with no corresponding avcodec_close()), 0 otherwise.
|
|
*/
|
|
int avcodec_is_open(AVCodecContext *s);
|
|
|
|
/**
|
|
* @return a non-zero number if codec is an encoder, zero otherwise
|
|
*/
|
|
int av_codec_is_encoder(const AVCodec *codec);
|
|
|
|
/**
|
|
* @return a non-zero number if codec is a decoder, zero otherwise
|
|
*/
|
|
int av_codec_is_decoder(const AVCodec *codec);
|
|
|
|
/**
|
|
* @return descriptor for given codec ID or NULL if no descriptor exists.
|
|
*/
|
|
const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
|
|
|
|
/**
|
|
* Iterate over all codec descriptors known to libavcodec.
|
|
*
|
|
* @param prev previous descriptor. NULL to get the first descriptor.
|
|
*
|
|
* @return next descriptor or NULL after the last descriptor
|
|
*/
|
|
const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
|
|
|
|
/**
|
|
* @return codec descriptor with the given name or NULL if no such descriptor
|
|
* exists.
|
|
*/
|
|
const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVCODEC_AVCODEC_H */
|