diff options
Diffstat (limited to 'libavcodec/ttadata.h')
| -rw-r--r-- | libavcodec/ttadata.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libavcodec/ttadata.h b/libavcodec/ttadata.h new file mode 100644 index 0000000000..48c4cd0354 --- /dev/null +++ b/libavcodec/ttadata.h @@ -0,0 +1,50 @@ +/* + * TTA (The Lossless True Audio) data + * + * 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_TTADATA_H +#define AVCODEC_TTADATA_H + +#include "internal.h" + +#define MAX_ORDER 16 +typedef struct TTAFilter { + int32_t shift, round, error; + int32_t qm[MAX_ORDER]; + int32_t dx[MAX_ORDER]; + int32_t dl[MAX_ORDER]; +} TTAFilter; + +typedef struct TTARice { + uint32_t k0, k1, sum0, sum1; +} TTARice; + +typedef struct TTAChannel { + int32_t predictor; + TTAFilter filter; + TTARice rice; +} TTAChannel; + +extern const uint32_t ff_tta_shift_1[]; +extern const uint32_t * const ff_tta_shift_16; +extern const uint8_t ff_tta_filter_configs[]; + +void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1); +void ff_tta_filter_init(TTAFilter *c, int32_t shift); +#endif /* AVCODEC_TTADATA_H */ |