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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
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* TTA (The Lossless True Audio) data
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_TTADATA_H
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#define AVCODEC_TTADATA_H
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#include "internal.h"
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#define MAX_ORDER 16
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typedef struct TTAFilter {
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int32_t shift, round, error;
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int32_t qm[MAX_ORDER];
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int32_t dx[MAX_ORDER];
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int32_t dl[MAX_ORDER];
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} TTAFilter;
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typedef struct TTARice {
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uint32_t k0, k1, sum0, sum1;
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} TTARice;
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typedef struct TTAChannel {
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int32_t predictor;
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TTAFilter filter;
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TTARice rice;
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} TTAChannel;
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extern const uint32_t ff_tta_shift_1[];
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extern const uint32_t * const ff_tta_shift_16;
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extern const uint8_t ff_tta_filter_configs[];
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void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1);
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void ff_tta_filter_init(TTAFilter *c, int32_t shift);
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#endif /* AVCODEC_TTADATA_H */
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