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53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* WavPack shared functions
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <string.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "wv.h"
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int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
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{
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memset(wv, 0, sizeof(*wv));
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if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k'))
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return AVERROR_INVALIDDATA;
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wv->blocksize = AV_RL32(data + 4);
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if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT)
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return AVERROR_INVALIDDATA;
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wv->blocksize -= 24;
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wv->version = AV_RL16(data + 8);
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wv->total_samples = AV_RL32(data + 12);
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wv->block_idx = AV_RL32(data + 16);
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wv->samples = AV_RL32(data + 20);
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wv->flags = AV_RL32(data + 24);
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wv->crc = AV_RL32(data + 28);
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wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK);
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wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK);
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return 0;
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}
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