Signed-off-by: Paul B Mahol <onemda@gmail.com>pull/23/merge
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a4b5863eea
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2e67dde954
4 changed files with 117 additions and 68 deletions
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/*
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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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#include "ttadata.h" |
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const uint32_t ff_tta_shift_1[] = { |
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0x00000001, 0x00000002, 0x00000004, 0x00000008, |
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0x00000010, 0x00000020, 0x00000040, 0x00000080, |
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0x00000100, 0x00000200, 0x00000400, 0x00000800, |
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0x00001000, 0x00002000, 0x00004000, 0x00008000, |
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0x00010000, 0x00020000, 0x00040000, 0x00080000, |
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0x00100000, 0x00200000, 0x00400000, 0x00800000, |
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0x01000000, 0x02000000, 0x04000000, 0x08000000, |
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0x10000000, 0x20000000, 0x40000000, 0x80000000, |
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0x80000000, 0x80000000, 0x80000000, 0x80000000, |
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0x80000000, 0x80000000, 0x80000000, 0x80000000 |
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}; |
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const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4; |
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const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 }; |
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void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1) |
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{ |
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c->k0 = k0; |
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c->k1 = k1; |
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c->sum0 = ff_tta_shift_16[k0]; |
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c->sum1 = ff_tta_shift_16[k1]; |
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} |
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void ff_tta_filter_init(TTAFilter *c, int32_t shift) { |
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memset(c, 0, sizeof(TTAFilter)); |
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c->shift = shift; |
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c->round = ff_tta_shift_1[shift-1]; |
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} |
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/*
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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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