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https://github.com/nyanmisaka/ffmpeg-rockchip.git
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6397b4d6a2
Up until now ff_vorbiscomment_write() used the bytestream API to write VorbisComments. Therefore the caller had to provide a sufficiently large buffer to write the output. Yet two of the three callers (namely the FLAC and the Matroska muxer) actually want the output to be written via an AVIOContext; therefore they allocated buffers of the right size just for this purpose (i.e. they get freed immediately afterwards). Only the Ogg muxer actually wants a buffer. But given that it is easy to wrap a buffer into an AVIOContext this commit changes ff_vorbiscomment_write() to use an AVIOContext for its output. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/*
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* VorbisComment writer
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* Copyright (c) 2009 James Darnley
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_VORBISCOMMENT_H
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#define AVFORMAT_VORBISCOMMENT_H
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#include "avformat.h"
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#include "metadata.h"
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/**
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* Calculate the length in bytes of a VorbisComment. This is the minimum
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* size required by ff_vorbiscomment_write().
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*
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* @param m The metadata structure to be parsed. For no metadata, set to NULL.
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* @param vendor_string The vendor string to be added into the VorbisComment.
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* For no string, set to an empty string.
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* @return The length in bytes.
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*/
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int64_t ff_vorbiscomment_length(const AVDictionary *m, const char *vendor_string,
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AVChapter **chapters, unsigned int nb_chapters);
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/**
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* Write a VorbisComment into an AVIOContext. The output size can be obtained
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* in advance by passing the same chapters, AVDictionary and vendor_string to
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* ff_vorbiscomment_length()
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*
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* @param pb The AVIOContext to write the output.
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* @param m The metadata struct to write.
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* @param vendor_string The vendor string to write.
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* @param chapters The chapters to write.
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* @param nb_chapters The number of chapters to write.
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*/
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int ff_vorbiscomment_write(AVIOContext *pb, const AVDictionary *m,
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const char *vendor_string,
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AVChapter **chapters, unsigned int nb_chapters);
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extern const AVMetadataConv ff_vorbiscomment_metadata_conv[];
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#endif /* AVFORMAT_VORBISCOMMENT_H */
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