From 794ca87d2bff2513118de8b97595b3e23070e67d Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Tue, 28 May 2013 09:33:43 +0200 Subject: wvdec: split block header parsing into a separate file It will be reused by other muxers and demuxers. --- libavformat/wv.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 libavformat/wv.h (limited to 'libavformat/wv.h') diff --git a/libavformat/wv.h b/libavformat/wv.h new file mode 100644 index 0000000000..ef285d2ebc --- /dev/null +++ b/libavformat/wv.h @@ -0,0 +1,56 @@ +/* + * 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 + +#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 */ -- cgit v1.2.3