aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* WavPack shared functions
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_WV_H
#define AVFORMAT_WV_H
#include <stdint.h>
#define WV_HEADER_SIZE 32
#define WV_FLAG_INITIAL_BLOCK (1 << 11)
#define WV_FLAG_FINAL_BLOCK (1 << 12)
// specs say that maximum block size is 1Mb
#define WV_BLOCK_LIMIT 1048576
typedef struct WvHeader {
uint32_t blocksize; //< size of the block data (excluding the header)
uint16_t version; //< bitstream version
uint32_t total_samples; //< total number of samples in the stream
uint32_t block_idx; //< index of the first sample in this block
uint32_t samples; //< number of samples in this block
uint32_t flags;
uint32_t crc;
int initial, final;
} WvHeader;
/**
* Parse a WavPack block header.
*
* @param wv this struct will be filled with parse header information
* @param data header data, must be WV_HEADER_SIZE bytes long
*
* @return 0 on success, a negative AVERROR code on failure
*/
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data);
#endif /* AVFORMAT_WV_H */
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