50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
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* raw FLAC muxer
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* Copyright (C) 2009 Justin Ruggles
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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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#include "libavcodec/flac.h"
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#include "libavcodec/bytestream.h"
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#include "avformat.h"
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#include "flacenc.h"
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int ff_flac_write_header(AVIOContext *pb, AVCodecContext *codec,
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int last_block)
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{
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uint8_t header[8] = {
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0x66, 0x4C, 0x61, 0x43, 0x00, 0x00, 0x00, 0x22
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};
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uint8_t *streaminfo;
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enum FLACExtradataFormat format;
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header[4] = last_block ? 0x80 : 0x00;
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if (!ff_flac_is_extradata_valid(codec, &format, &streaminfo))
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return -1;
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/* write "fLaC" stream marker and first metadata block header if needed */
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if (format == FLAC_EXTRADATA_FORMAT_STREAMINFO) {
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avio_write(pb, header, 8);
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}
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/* write STREAMINFO or full header */
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avio_write(pb, codec->extradata, codec->extradata_size);
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return 0;
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}
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