diff options
Diffstat (limited to 'libavcodec/dvaudio.h')
-rw-r--r-- | libavcodec/dvaudio.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libavcodec/dvaudio.h b/libavcodec/dvaudio.h new file mode 100644 index 0000000..e7f70c5 --- /dev/null +++ b/libavcodec/dvaudio.h @@ -0,0 +1,39 @@ +/* + * 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 + */ + +#ifndef AVCODEC_DVAUDIO_H +#define AVCODEC_DVAUDIO_H + +#include <stdint.h> + +static inline int dv_get_audio_sample_count(const uint8_t *buffer, int dsf) +{ + int samples = buffer[0] & 0x3f; /* samples in this frame - min samples */ + + switch ((buffer[3] >> 3) & 0x07) { + case 0: + return samples + (dsf ? 1896 : 1580); + case 1: + return samples + (dsf ? 1742 : 1452); + case 2: + default: + return samples + (dsf ? 1264 : 1053); + } +} + +#endif /* AVCODEC_DVAUDIO_H */ |