| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * TTA (The Lossless True Audio) data | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include <string.h> | ||
| 22 | #include "ttadata.h" | ||
| 23 | |||
| 24 | const uint32_t ff_tta_shift_1[] = { | ||
| 25 | 0x00000001, 0x00000002, 0x00000004, 0x00000008, | ||
| 26 | 0x00000010, 0x00000020, 0x00000040, 0x00000080, | ||
| 27 | 0x00000100, 0x00000200, 0x00000400, 0x00000800, | ||
| 28 | 0x00001000, 0x00002000, 0x00004000, 0x00008000, | ||
| 29 | 0x00010000, 0x00020000, 0x00040000, 0x00080000, | ||
| 30 | 0x00100000, 0x00200000, 0x00400000, 0x00800000, | ||
| 31 | 0x01000000, 0x02000000, 0x04000000, 0x08000000, | ||
| 32 | 0x10000000, 0x20000000, 0x40000000, 0x80000000, | ||
| 33 | 0x80000000, 0x80000000, 0x80000000, 0x80000000, | ||
| 34 | 0x80000000, 0x80000000, 0x80000000, 0x80000000, | ||
| 35 | 0xFFFFFFFF | ||
| 36 | }; | ||
| 37 | |||
| 38 | const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4; | ||
| 39 | |||
| 40 | const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 }; | ||
| 41 | |||
| 42 | 122 | void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1) | |
| 43 | { | ||
| 44 | 122 | c->k0 = k0; | |
| 45 | 122 | c->k1 = k1; | |
| 46 | 122 | c->sum0 = ff_tta_shift_16[k0]; | |
| 47 | 122 | c->sum1 = ff_tta_shift_16[k1]; | |
| 48 | 122 | } | |
| 49 | |||
| 50 | 122 | void ff_tta_filter_init(TTAFilter *c, int32_t shift) | |
| 51 | { | ||
| 52 | 122 | memset(c, 0, sizeof(TTAFilter)); | |
| 53 | 122 | c->shift = shift; | |
| 54 | 122 | c->round = ff_tta_shift_1[shift-1]; | |
| 55 | 122 | } | |
| 56 |