dvaudio.h 1.2 KB

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  1. /*
  2. * This file is part of FFmpeg.
  3. *
  4. * FFmpeg is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU Lesser General Public
  6. * License as published by the Free Software Foundation; either
  7. * version 2.1 of the License, or (at your option) any later version.
  8. *
  9. * FFmpeg is distributed in the hope that it will be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * Lesser General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU Lesser General Public
  15. * License along with FFmpeg; if not, write to the Free Software
  16. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17. */
  18. #ifndef AVCODEC_DVAUDIO_H
  19. #define AVCODEC_DVAUDIO_H
  20. #include <stdint.h>
  21. static inline int dv_get_audio_sample_count(const uint8_t *buffer, int dsf)
  22. {
  23. int samples = buffer[0] & 0x3f; /* samples in this frame - min samples */
  24. switch ((buffer[3] >> 3) & 0x07) {
  25. case 0:
  26. return samples + (dsf ? 1896 : 1580);
  27. case 1:
  28. return samples + (dsf ? 1742 : 1452);
  29. case 2:
  30. default:
  31. return samples + (dsf ? 1264 : 1053);
  32. }
  33. }
  34. #endif /* AVCODEC_DVAUDIO_H */