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db7968bff4
This allows callers with avio write callbacks to get the bytestream positions that correspond to keyframes, suitable for live streaming. In the simplest form, a caller could expect that a header is written to the bytestream during the avformat_write_header, and the data output to the avio context during e.g. av_write_frame corresponds exactly to the current packet passed in. When combined with av_interleaved_write_frame, and with muxers that do buffering (most muxers that do some sort of fragmenting or clustering), the mapping from input data to bytestream positions is nontrivial. This allows callers to get directly information about what part of the bytestream is what, without having to resort to assumptions about the muxer behaviour. One keyframe/fragment/block can still be split into multiple (if they are larger than the aviocontext buffer), which would call the callback with e.g. AVIO_DATA_MARKER_SYNC_POINT, followed by AVIO_DATA_MARKER_UNKNOWN for the second time it is called with the following data. Signed-off-by: Martin Storsjö <martin@martin.st>
71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/*
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* Version macros.
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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 AVFORMAT_VERSION_H
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#define AVFORMAT_VERSION_H
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/**
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* @file
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* @ingroup libavf
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* Libavformat version macros
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*/
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#include "libavutil/version.h"
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#define LIBAVFORMAT_VERSION_MAJOR 57
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#define LIBAVFORMAT_VERSION_MINOR 7
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#define LIBAVFORMAT_VERSION_MICRO 0
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
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#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
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/**
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* FF_API_* defines may be placed below to indicate public API that will be
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* dropped at a future version bump. The defines themselves are not part of
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* the public API and may change, break or disappear at any time.
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*/
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#ifndef FF_API_LAVF_BITEXACT
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#define FF_API_LAVF_BITEXACT (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#ifndef FF_API_LAVF_FRAC
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#define FF_API_LAVF_FRAC (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#ifndef FF_API_LAVF_CODEC_TB
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#define FF_API_LAVF_CODEC_TB (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#ifndef FF_API_LAVF_FMT_RAWPICTURE
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#define FF_API_LAVF_FMT_RAWPICTURE (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#ifndef FF_API_COMPUTE_PKT_FIELDS2
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#define FF_API_COMPUTE_PKT_FIELDS2 (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#ifndef FF_API_LAVF_AVCTX
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#define FF_API_LAVF_AVCTX (LIBAVFORMAT_VERSION_MAJOR < 58)
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#endif
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#endif /* AVFORMAT_VERSION_H */
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