/*
  * 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;
 }