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4496 lines
146 KiB
4496 lines
146 KiB
/* |
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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 "version.h" |
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#if FF_API_FAST_MALLOC |
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// to provide fast_*alloc |
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#include "libavutil/mem.h" |
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#endif |
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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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#if FF_API_XVMC |
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AV_CODEC_ID_MPEG2VIDEO_XVMC, |
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#endif /* FF_API_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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AV_CODEC_ID_WEBP, |
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AV_CODEC_ID_HNM4_VIDEO, |
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AV_CODEC_ID_HEVC, |
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AV_CODEC_ID_FIC, |
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AV_CODEC_ID_ALIAS_PIX, |
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AV_CODEC_ID_BRENDER_PIX, |
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AV_CODEC_ID_PAF_VIDEO, |
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AV_CODEC_ID_EXR, |
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AV_CODEC_ID_VP7, |
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AV_CODEC_ID_SANM, |
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AV_CODEC_ID_SGIRLE, |
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AV_CODEC_ID_MVC1, |
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AV_CODEC_ID_MVC2, |
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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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AV_CODEC_ID_PCM_S24LE_PLANAR, |
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AV_CODEC_ID_PCM_S32LE_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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AV_CODEC_ID_ADPCM_VIMA, |
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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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#if FF_API_VOXWARE |
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AV_CODEC_ID_VOXWARE, |
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#endif |
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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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AV_CODEC_ID_METASOUND, |
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AV_CODEC_ID_PAF_AUDIO, |
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AV_CODEC_ID_ON2AVC, |
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|
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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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|
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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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|
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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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|
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AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
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* stream (only used by libavformat) */ |
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AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems |
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* stream (only used by libavformat) */ |
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AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. |
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}; |
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|
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/** |
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* This struct describes the properties of a single codec described by an |
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* AVCodecID. |
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* @see avcodec_descriptor_get() |
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*/ |
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typedef struct AVCodecDescriptor { |
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enum AVCodecID id; |
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enum AVMediaType type; |
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/** |
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* Name of the codec described by this descriptor. It is non-empty and |
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* unique for each codec descriptor. It should contain alphanumeric |
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* characters and '_' only. |
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*/ |
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const char *name; |
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/** |
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* A more descriptive name for this codec. May be NULL. |
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*/ |
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const char *long_name; |
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/** |
|
* 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) |
|
/** |
|
* Codec supports frame reordering. That is, the coded order (the order in which |
|
* the encoded packets are output by the encoders / stored / input to the |
|
* decoders) may be different from the presentation order of the corresponding |
|
* frames. |
|
* |
|
* For codecs that do not have this property set, PTS and DTS should always be |
|
* equal. |
|
*/ |
|
#define AV_CODEC_PROP_REORDER (1 << 3) |
|
|
|
/** |
|
* @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 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; |
|
|
|
#if FF_API_MAX_BFRAMES |
|
/** |
|
* @deprecated there is no libavcodec-wide limit on the number of B-frames |
|
*/ |
|
#define FF_MAX_B_FRAMES 16 |
|
#endif |
|
|
|
/* 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_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted |
|
#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. |
|
#if FF_API_GMC |
|
/** |
|
* @deprecated use the "gmc" private option of the libxvid encoder |
|
*/ |
|
#define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
|
#endif |
|
#if FF_API_MV0 |
|
/** |
|
* @deprecated use the flag "mv0" in the "mpv_flags" private option of the |
|
* mpegvideo encoders |
|
*/ |
|
#define CODEC_FLAG_MV0 0x0040 |
|
#endif |
|
#if FF_API_INPUT_PRESERVED |
|
/** |
|
* @deprecated passing reference-counted frames to the encoders replaces this |
|
* flag |
|
*/ |
|
#define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
|
#endif |
|
#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. |
|
#if FF_API_EMU_EDGE |
|
/** |
|
* @deprecated edges are not used/required anymore. I.e. this flag is now always |
|
* set. |
|
*/ |
|
#define CODEC_FLAG_EMU_EDGE 0x4000 |
|
#endif |
|
#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. */ |
|
#if FF_API_NORMALIZE_AQP |
|
/** |
|
* @deprecated use the flag "naq" in the "mpv_flags" private option of the |
|
* mpegvideo encoders |
|
*/ |
|
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 |
|
#endif |
|
#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 |
|
#if FF_API_XVMC |
|
/* Codec can export data for HW decoding (XvMC). */ |
|
#define CODEC_CAP_HWACCEL 0x0010 |
|
#endif /* FF_API_XVMC */ |
|
/** |
|
* 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 |
|
#if FF_API_CAP_VDPAU |
|
/** |
|
* Codec can export data for HW decoding (VDPAU). |
|
*/ |
|
#define CODEC_CAP_HWACCEL_VDPAU 0x0080 |
|
#endif |
|
/** |
|
* 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 |
|
#if FF_API_NEG_LINESIZES |
|
/** |
|
* @deprecated no codecs use this capability |
|
*/ |
|
#define CODEC_CAP_NEG_LINESIZES 0x0800 |
|
#endif |
|
/** |
|
* 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 |
|
|
|
#if FF_API_MB_TYPE |
|
//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, ...) |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_QSCALE_TYPE |
|
#define FF_QSCALE_TYPE_MPEG1 0 |
|
#define FF_QSCALE_TYPE_MPEG2 1 |
|
#define FF_QSCALE_TYPE_H264 2 |
|
#define FF_QSCALE_TYPE_VP56 3 |
|
#endif |
|
|
|
#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 side data should be associated with an audio stream and contains |
|
* ReplayGain information in form of the AVReplayGain struct. |
|
*/ |
|
AV_PKT_DATA_REPLAYGAIN, |
|
|
|
/** |
|
* This side data contains a 3x3 transformation matrix describing an affine |
|
* transformation that needs to be applied to the decoded video frames for |
|
* correct presentation. |
|
* |
|
* See libavutil/display.h for a detailed description of the data. |
|
*/ |
|
AV_PKT_DATA_DISPLAYMATRIX, |
|
|
|
/** |
|
* This side data should be associated with a video stream and contains |
|
* Stereoscopic 3D information in form of the AVStereo3D struct. |
|
*/ |
|
AV_PKT_DATA_STEREO3D, |
|
}; |
|
|
|
typedef struct AVPacketSideData { |
|
uint8_t *data; |
|
int size; |
|
enum AVPacketSideDataType type; |
|
} AVPacketSideData; |
|
|
|
/** |
|
* 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. |
|
*/ |
|
AVPacketSideData *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; |
|
#if FF_API_CODEC_NAME |
|
/** |
|
* @deprecated this field is not used for anything in libavcodec |
|
*/ |
|
attribute_deprecated |
|
char codec_name[32]; |
|
#endif |
|
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: the use of this field for decoding is deprecated. |
|
* Use framerate instead. |
|
*/ |
|
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 field is unused (see initial_padding). |
|
* |
|
* 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; |
|
|
|
#if FF_API_ASPECT_EXTENDED |
|
#define FF_ASPECT_EXTENDED 15 |
|
#endif |
|
|
|
/** |
|
* 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. |
|
* @note The callback may be called again immediately if initialization for |
|
* the selected (hardware-accelerated) pixel format failed. |
|
* @warning Behavior is undefined if the callback returns a value not |
|
* in the fmt list of formats. |
|
* @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; |
|
|
|
#if FF_API_AFD |
|
/** |
|
* 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. |
|
* @deprecated Deprecated in favor of AVSideData |
|
*/ |
|
attribute_deprecated 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 |
|
#endif /* FF_API_AFD */ |
|
|
|
/** |
|
* 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) |
|
|
|
#if FF_API_XVMC |
|
/** |
|
* XVideo Motion Acceleration |
|
* - encoding: forbidden |
|
* - decoding: set by decoder |
|
* @deprecated XvMC support is slated for removal. |
|
*/ |
|
attribute_deprecated int xvmc_acceleration; |
|
#endif /* FF_API_XVMC */ |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated |
|
int me_threshold; |
|
|
|
/** |
|
* @deprecated this field is unused |
|
*/ |
|
attribute_deprecated |
|
int mb_threshold; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float border_masking; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_UNUSED_MEMBERS |
|
/** |
|
* Multiplied by qscale for each frame and added to scene_change_score. |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
attribute_deprecated int scenechange_factor; |
|
#endif |
|
|
|
/** |
|
* |
|
* 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. |
|
* |
|
* 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; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float rc_qsquish; |
|
|
|
attribute_deprecated |
|
float rc_qmod_amp; |
|
attribute_deprecated |
|
int rc_qmod_freq; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
const char *rc_eq; |
|
#endif |
|
|
|
/** |
|
* maximum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_max_rate; |
|
|
|
/** |
|
* minimum bitrate |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int rc_min_rate; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
float rc_buffer_aggressivity; |
|
|
|
attribute_deprecated |
|
float rc_initial_cplx; |
|
#endif |
|
|
|
/** |
|
* 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 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_CODER_TYPE_DEFLATE 4 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
/** |
|
* coder type |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int coder_type; |
|
|
|
/** |
|
* context model |
|
* - encoding: Set by user. |
|
* - decoding: unused |
|
*/ |
|
int context_model; |
|
|
|
#if FF_API_MPV_OPT |
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int lmin; |
|
|
|
/** |
|
* @deprecated use encoder private options instead |
|
*/ |
|
attribute_deprecated |
|
int lmax; |
|
#endif |
|
|
|
/** |
|
* 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 |
|
#if FF_API_OLD_MSMPEG4 |
|
#define FF_BUG_OLD_MSMPEG4 2 |
|
#endif |
|
#define FF_BUG_XVID_ILACE 4 |
|
#define FF_BUG_UMP4 8 |
|
#define FF_BUG_NO_PADDING 16 |
|
#define FF_BUG_AMV 32 |
|
#if FF_API_AC_VLC |
|
#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
|
#endif |
|
#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 |
|
#if FF_API_DEBUG_MV |
|
/** |
|
* @deprecated this option does nothing |
|
*/ |
|
#define FF_DEBUG_MV 32 |
|
#endif |
|
#define FF_DEBUG_DCT_COEFF 0x00000040 |
|
#define FF_DEBUG_SKIP 0x00000080 |
|
#define FF_DEBUG_STARTCODE 0x00000100 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_DEBUG_PTS 0x00000200 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
#define FF_DEBUG_ER 0x00000400 |
|
#define FF_DEBUG_MMCO 0x00000800 |
|
#define FF_DEBUG_BUGS 0x00001000 |
|
#if FF_API_DEBUG_MV |
|
#define FF_DEBUG_VIS_QP 0x00002000 |
|
#define FF_DEBUG_VIS_MB_TYPE 0x00004000 |
|
#endif |
|
#define FF_DEBUG_BUFFERS 0x00008000 |
|
#define FF_DEBUG_THREADS 0x00010000 |
|
|
|
#if FF_API_DEBUG_MV |
|
/** |
|
* @deprecated this option does not have any effect |
|
*/ |
|
attribute_deprecated |
|
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 |
|
#endif |
|
|
|
/** |
|
* Error recognition; may misdetect some more or less valid parts as errors. |
|
* - encoding: unused |
|
* - decoding: Set by user. |
|
*/ |
|
int err_recognition; |
|
|
|
/** |
|
* Verify checksums embedded in the bitstream (could be of either encoded or |
|
* decoded data, depending on the codec) and print an error message on mismatch. |
|
* If AV_EF_EXPLODE is also set, a mismatching checksum will result in the |
|
* decoder returning an error. |
|
*/ |
|
#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 |
|
* - 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 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_DCT_INT 2 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
#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 |
|
#if FF_API_ARCH_SH4 |
|
#define FF_IDCT_SH4 9 |
|
#endif |
|
#define FF_IDCT_SIMPLEARM 10 |
|
#if FF_API_UNUSED_MEMBERS |
|
#define FF_IDCT_IPP 13 |
|
#endif /* FF_API_UNUSED_MEMBERS */ |
|
#define FF_IDCT_XVID 14 |
|
#if FF_API_IDCT_XVIDMMX |
|
#define FF_IDCT_XVIDMMX 14 |
|
#endif /* FF_API_IDCT_XVIDMMX */ |
|
#define FF_IDCT_SIMPLEARMV5TE 16 |
|
#define FF_IDCT_SIMPLEARMV6 17 |
|
#if FF_API_ARCH_SPARC |
|
#define FF_IDCT_SIMPLEVIS 18 |
|
#endif |
|
#define FF_IDCT_FAAN 20 |
|
#define FF_IDCT_SIMPLENEON 22 |
|
#if FF_API_ARCH_ALPHA |
|
#define FF_IDCT_SIMPLEALPHA 23 |
|
#endif |
|
|
|
/** |
|
* 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: unused |
|
*/ |
|
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); |
|
|
|
#if FF_API_THREAD_OPAQUE |
|
/** |
|
* @deprecated this field should not be used from outside of lavc |
|
*/ |
|
attribute_deprecated |
|
void *thread_opaque; |
|
#endif |
|
|
|
/** |
|
* 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 |
|
|
|
|
|
#define FF_PROFILE_HEVC_MAIN 1 |
|
#define FF_PROFILE_HEVC_MAIN_10 2 |
|
#define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 |
|
|
|
/** |
|
* 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; |
|
|
|
#if FF_API_ERROR_RATE |
|
/** |
|
* @deprecated use the 'error_rate' private AVOption of the mpegvideo |
|
* encoders |
|
*/ |
|
attribute_deprecated |
|
int error_rate; |
|
#endif |
|
|
|
#if FF_API_CODEC_PKT |
|
/** |
|
* @deprecated this field is not supposed to be accessed from outside lavc |
|
*/ |
|
attribute_deprecated |
|
AVPacket *pkt; |
|
#endif |
|
|
|
/** |
|
* 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; |
|
|
|
/** |
|
* Encoding only. Allow encoders to output packets that do not contain any |
|
* encoded data, only side data. |
|
* |
|
* Some encoders need to output such packets, e.g. to update some stream |
|
* parameters at the end of encoding. |
|
* |
|
* All callers are strongly recommended to set this option to 1 and update |
|
* their code to deal with such packets, since this behaviour may become |
|
* always enabled in the future (then this option will be deprecated and |
|
* later removed). To avoid ABI issues when this happens, the callers should |
|
* use AVOptions to set this field. |
|
*/ |
|
int side_data_only_packets; |
|
|
|
/** |
|
* Audio only. The number of "priming" samples (padding) inserted by the |
|
* encoder at the beginning of the audio. I.e. this number of leading |
|
* decoded samples must be discarded by the caller to get the original audio |
|
* without leading padding. |
|
* |
|
* - decoding: unused |
|
* - encoding: Set by libavcodec. The timestamps on the output packets are |
|
* adjusted by the encoder so that they always refer to the |
|
* first sample of the data actually contained in the packet, |
|
* including any added padding. E.g. if the timebase is |
|
* 1/samplerate and the timestamp of the first input sample is |
|
* 0, the timestamp of the first output packet will be |
|
* -initial_padding. |
|
*/ |
|
int initial_padding; |
|
|
|
/* |
|
* - decoding: For codecs that store a framerate value in the compressed |
|
* bitstream, the decoder may export it here. { 0, 1} when |
|
* unknown. |
|
* - encoding: unused |
|
*/ |
|
AVRational framerate; |
|
} 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 |
|
#if FF_API_LOWRES |
|
attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder |
|
#endif |
|
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; |
|
|
|
/** |
|
* @defgroup lavc_hwaccel 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; |
|
|
|
/***************************************************************** |
|
* 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. |
|
***************************************************************** |
|
*/ |
|
struct AVHWAccel *next; |
|
|
|
/** |
|
* Allocate a custom buffer |
|
*/ |
|
int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); |
|
|
|
/** |
|
* 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 per-frame hardware accelerator private data. |
|
* |
|
* Private data is allocated with av_mallocz() before |
|
* AVCodecContext.get_buffer() and deallocated after |
|
* AVCodecContext.release_buffer(). |
|
*/ |
|
int frame_priv_data_size; |
|
|
|
/** |
|
* Initialize the hwaccel private data. |
|
* |
|
* This will be called from ff_get_format(), after hwaccel and |
|
* hwaccel_context are set and the hwaccel private data in AVCodecInternal |
|
* is allocated. |
|
*/ |
|
int (*init)(AVCodecContext *avctx); |
|
|
|
/** |
|
* Uninitialize the hwaccel private data. |
|
* |
|
* This will be called from get_format() or avcodec_close(), after hwaccel |
|
* and hwaccel_context are already uninitialized. |
|
*/ |
|
int (*uninit)(AVCodecContext *avctx); |
|
|
|
/** |
|
* Size of the private data to allocate in |
|
* AVCodecInternal.hwaccel_priv_data. |
|
*/ |
|
int priv_data_size; |
|
} AVHWAccel; |
|
|
|
/** |
|
* Hardware acceleration should be used for decoding even if the codec level |
|
* used is unknown or higher than the maximum supported level reported by the |
|
* hardware driver. |
|
*/ |
|
#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0) |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @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 should be freed with avcodec_free_context(). |
|
* |
|
* @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); |
|
|
|
/** |
|
* Free the codec context and everything associated with it and write NULL to |
|
* the provided pointer. |
|
*/ |
|
void avcodec_free_context(AVCodecContext **avctx); |
|
|
|
/** |
|
* 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); |
|
|
|
#if FF_API_AVFRAME_LAVC |
|
/** |
|
* @deprecated use av_frame_alloc() |
|
*/ |
|
attribute_deprecated |
|
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. |
|
* |
|
* @deprecated use av_frame_unref() |
|
*/ |
|
attribute_deprecated |
|
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()). |
|
* |
|
* @deprecated use av_frame_free() |
|
*/ |
|
attribute_deprecated |
|
void avcodec_free_frame(AVFrame **frame); |
|
#endif |
|
|
|
/** |
|
* 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); |
|
|
|
/** |
|
* Convenience function to free all the side data stored. |
|
* All the other fields stay untouched. |
|
* |
|
* @param pkt packet |
|
*/ |
|
void av_packet_free_side_data(AVPacket *pkt); |
|
|
|
/** |
|
* Setup a new reference to the data described by a given packet |
|
* |
|
* If src is reference-counted, setup dst as a new reference to the |
|
* buffer in src. Otherwise allocate a new buffer in dst and copy the |
|
* data from src into it. |
|
* |
|
* All the other fields are copied from src. |
|
* |
|
* @see av_packet_unref |
|
* |
|
* @param dst Destination packet |
|
* @param src Source packet |
|
* |
|
* @return 0 on success, a negative AVERROR on error. |
|
*/ |
|
int av_packet_ref(AVPacket *dst, AVPacket *src); |
|
|
|
/** |
|
* Wipe the packet. |
|
* |
|
* Unreference the buffer referenced by the packet and reset the |
|
* remaining packet fields to their default values. |
|
* |
|
* @param pkt The packet to be unreferenced. |
|
*/ |
|
void av_packet_unref(AVPacket *pkt); |
|
|
|
/** |
|
* Move every field in src to dst and reset src. |
|
* |
|
* @see av_packet_unref |
|
* |
|
* @param src Source packet, will be reset |
|
* @param dst Destination packet |
|
*/ |
|
void av_packet_move_ref(AVPacket *dst, AVPacket *src); |
|
|
|
/** |
|
* Copy only "properties" fields from src to dst. |
|
* |
|
* Properties for the purpose of this function are all the fields |
|
* beside those related to the packet data (buf, data, size) |
|
* |
|
* @param dst Destination packet |
|
* @param src Source packet |
|
* |
|
* @return 0 on success AVERROR on failure. |
|
* |
|
*/ |
|
int av_packet_copy_props(AVPacket *dst, const AVPacket *src); |
|
|
|
/** |
|
* Convert valid timing fields (timestamps / durations) in a packet from one |
|
* timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be |
|
* ignored. |
|
* |
|
* @param pkt packet on which the conversion will be performed |
|
* @param tb_src source timebase, in which the timing fields in pkt are |
|
* expressed |
|
* @param tb_dst destination timebase, to which the timing fields will be |
|
* converted |
|
*/ |
|
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
/** |
|
* @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); |
|
|
|
#if FF_API_EMU_EDGE |
|
/** |
|
* 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. |
|
* |
|
* @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer |
|
* needed |
|
*/ |
|
attribute_deprecated |
|
unsigned avcodec_get_edge_width(void); |
|
#endif |
|
|
|
/** |
|
* 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. |
|
*/ |
|
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. |
|
*/ |
|
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 and the return value would be |
|
* less than the packet size. 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. |
|
* |
|
* Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input |
|
* and output. This means that for some packets they will not immediately |
|
* produce decoded output and need to be flushed at the end of decoding to get |
|
* all the decoded data. Flushing is done by calling this function with packets |
|
* with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
|
* returning samples. It is safe to flush even those decoders that are not |
|
* marked with CODEC_CAP_DELAY, then no samples will be returned. |
|
* |
|
* @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. |
|
* |
|
* @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 or flushing 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. Note that this field being set to zero |
|
* does not mean that an error has occurred. For |
|
* decoders with CODEC_CAP_DELAY set, no given decode |
|
* call is guaranteed to produce a frame. |
|
* @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 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 or flushing 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; |
|
|
|
/** |
|
* Picture number incremented in presentation or output order. |
|
* This field may be reinitialized at the first picture of a new sequence. |
|
* |
|
* For example, this corresponds to H.264 PicOrderCnt. |
|
*/ |
|
int output_picture_number; |
|
} 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(const 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); |
|
|
|
/** |
|
* @} |
|
*/ |
|
|
|
#if FF_API_SET_DIMENSIONS |
|
/** |
|
* @deprecated this function is not supposed to be used from outside of lavc |
|
*/ |
|
attribute_deprecated |
|
void avcodec_set_dimensions(AVCodecContext *s, int width, int height); |
|
#endif |
|
|
|
/** |
|
* Put a string representing the codec tag codec_tag in buf. |
|
* |
|
* @param buf buffer to place codec tag in |
|
* @param buf_size size in bytes of buf |
|
* @param codec_tag codec tag to assign |
|
* @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); |
|
|
|
/** |
|
* Reset the internal decoder state / flush internal buffers. Should be called |
|
* e.g. when seeking or when switching to a different stream. |
|
* |
|
* @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0), |
|
* this invalidates the frames previously returned from the decoder. When |
|
* refcounted frames are used, the decoder just releases any references it might |
|
* keep internally, but the caller's reference remains valid. |
|
*/ |
|
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(const AVBitStreamFilter *f); |
|
|
|
/* memory */ |
|
|
|
/** |
|
* 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(const 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. The "mutex" argument to the function points |
|
* to a (void *) where the lockmgr should store/get a pointer to a user |
|
* allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the |
|
* value left by the last call for all other ops. If the lock manager is |
|
* unable to perform the op then it should leave the mutex in the same |
|
* state as when it was called and return a non-zero value. However, |
|
* when called with AV_LOCK_DESTROY the mutex will always be assumed to |
|
* have been successfully destroyed. If av_lockmgr_register succeeds |
|
* it will return a non-negative value, if it fails it will return a |
|
* negative value and destroy all mutex and unregister all callbacks. |
|
* av_lockmgr_register is not thread-safe, it must be called from a |
|
* single thread before any calls which make use of locking are used. |
|
* |
|
* @param cb User defined callback. av_lockmgr_register invokes calls |
|
* to this callback and the previously registered callback. |
|
* The callback will be used to create more than one mutex |
|
* each of which must be backed by its own underlying locking |
|
* mechanism (i.e. do not use a single static object to |
|
* implement your lock manager). If cb is set to NULL the |
|
* lockmgr will be unregistered. |
|
*/ |
|
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 */
|
|
|