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53 lines
1.7 KiB
53 lines
1.7 KiB
/* |
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* WavPack shared functions |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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/error.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/macros.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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