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57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
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/*
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* WavPack shared functions
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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_WV_H
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#define AVFORMAT_WV_H
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#include <stdint.h>
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#define WV_HEADER_SIZE 32
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#define WV_FLAG_INITIAL_BLOCK (1 << 11)
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#define WV_FLAG_FINAL_BLOCK (1 << 12)
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// specs say that maximum block size is 1Mb
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#define WV_BLOCK_LIMIT 1048576
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typedef struct WvHeader {
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uint32_t blocksize; //< size of the block data (excluding the header)
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uint16_t version; //< bitstream version
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uint32_t total_samples; //< total number of samples in the stream
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uint32_t block_idx; //< index of the first sample in this block
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uint32_t samples; //< number of samples in this block
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uint32_t flags;
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uint32_t crc;
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int initial, final;
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} WvHeader;
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/**
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* Parse a WavPack block header.
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*
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* @param wv this struct will be filled with parse header information
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* @param data header data, must be WV_HEADER_SIZE bytes long
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*
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* @return 0 on success, a negative AVERROR code on failure
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*/
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int ff_wv_parse_header(WvHeader *wv, const uint8_t *data);
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#endif /* AVFORMAT_WV_H */
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