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- /*
- * 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
- */
-
- #include <stdint.h>
- #include <string.h>
-
- #include "libavutil/common.h"
- #include "libavutil/intreadwrite.h"
-
- #include "wv.h"
-
- int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
- {
- memset(wv, 0, sizeof(*wv));
-
- if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k'))
- return AVERROR_INVALIDDATA;
-
- wv->blocksize = AV_RL32(data + 4);
- if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT)
- return AVERROR_INVALIDDATA;
- wv->blocksize -= 24;
-
- wv->version = AV_RL16(data + 8);
- wv->total_samples = AV_RL32(data + 12);
- wv->block_idx = AV_RL32(data + 16);
- wv->samples = AV_RL32(data + 20);
- wv->flags = AV_RL32(data + 24);
- wv->crc = AV_RL32(data + 28);
-
- wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK);
- wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK);
-
- return 0;
- }
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