mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
|
/*
|
||
|
|
* WavPack shared functions
|
||
|
|
*
|
||
|
|
* This file is part of Libav.
|
||
|
|
*
|
||
|
|
* Libav 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.
|
||
|
|
*
|
||
|
|
* Libav 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 Libav; 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 */
|