[deb_ffmpeg.git] / ffmpeg / libavformat / wv.h

/*
 * 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 */
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* WavPack shared functions
	3	*
	4	* This file is part of FFmpeg.
	5	*
	6	* FFmpeg is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* FFmpeg is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with FFmpeg; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#ifndef AVFORMAT_WV_H
	22	#define AVFORMAT_WV_H
	23
	24	#include <stdint.h>
	25
	26	#define WV_HEADER_SIZE 32
	27
	28	#define WV_FLAG_INITIAL_BLOCK (1 << 11)
	29	#define WV_FLAG_FINAL_BLOCK (1 << 12)
	30
	31	// specs say that maximum block size is 1Mb
	32	#define WV_BLOCK_LIMIT 1048576
	33
	34	typedef struct WvHeader {
	35	uint32_t blocksize; //< size of the block data (excluding the header)
	36	uint16_t version; //< bitstream version
	37	uint32_t total_samples; //< total number of samples in the stream
	38	uint32_t block_idx; //< index of the first sample in this block
	39	uint32_t samples; //< number of samples in this block
	40	uint32_t flags;
	41	uint32_t crc;
	42
	43	int initial, final;
	44	} WvHeader;
	45
	46	/**
	47	* Parse a WavPack block header.
	48	*
	49	* @param wv this struct will be filled with parse header information
	50	* @param data header data, must be WV_HEADER_SIZE bytes long
	51	*
	52	* @return 0 on success, a negative AVERROR code on failure
	53	*/
	54	int ff_wv_parse_header(WvHeader wv, const uint8_t data);
	55
	56	#endif /* AVFORMAT_WV_H */