/* * 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 */ #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; }