| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * TAK decoder | ||
| 3 | * Copyright (c) 2015 Paul B Mahol | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "libavutil/attributes.h" | ||
| 23 | #include "takdsp.h" | ||
| 24 | #include "config.h" | ||
| 25 | |||
| 26 | 1 | static void decorrelate_ls(int32_t *p1, int32_t *p2, int length) | |
| 27 | { | ||
| 28 | int i; | ||
| 29 | |||
| 30 |
2/2✓ Branch 0 taken 11025 times.
✓ Branch 1 taken 1 times.
|
11026 | for (i = 0; i < length; i++) { |
| 31 | 11025 | uint32_t a = p1[i]; | |
| 32 | 11025 | uint32_t b = p2[i]; | |
| 33 | 11025 | p2[i] = a + b; | |
| 34 | } | ||
| 35 | 1 | } | |
| 36 | |||
| 37 | ✗ | static void decorrelate_sr(int32_t *p1, int32_t *p2, int length) | |
| 38 | { | ||
| 39 | int i; | ||
| 40 | |||
| 41 | ✗ | for (i = 0; i < length; i++) { | |
| 42 | ✗ | uint32_t a = p1[i]; | |
| 43 | ✗ | uint32_t b = p2[i]; | |
| 44 | ✗ | p1[i] = b - a; | |
| 45 | } | ||
| 46 | ✗ | } | |
| 47 | |||
| 48 | 2 | static void decorrelate_sm(int32_t *p1, int32_t *p2, int length) | |
| 49 | { | ||
| 50 | int i; | ||
| 51 | |||
| 52 |
2/2✓ Branch 0 taken 22050 times.
✓ Branch 1 taken 2 times.
|
22052 | for (i = 0; i < length; i++) { |
| 53 | 22050 | uint32_t a = p1[i]; | |
| 54 | 22050 | int32_t b = p2[i]; | |
| 55 | 22050 | a -= b >> 1; | |
| 56 | 22050 | p1[i] = a; | |
| 57 | 22050 | p2[i] = a + b; | |
| 58 | } | ||
| 59 | 2 | } | |
| 60 | |||
| 61 | 6 | static void decorrelate_sf(int32_t *p1, int32_t *p2, int length, int dshift, int dfactor) | |
| 62 | { | ||
| 63 | int i; | ||
| 64 | |||
| 65 |
2/2✓ Branch 0 taken 66150 times.
✓ Branch 1 taken 6 times.
|
66156 | for (i = 0; i < length; i++) { |
| 66 | 66150 | uint32_t a = p1[i]; | |
| 67 | 66150 | int32_t b = p2[i]; | |
| 68 | 66150 | b = (unsigned)((int)(dfactor * (unsigned)(b >> dshift) + 128) >> 8) << dshift; | |
| 69 | 66150 | p1[i] = b - a; | |
| 70 | } | ||
| 71 | 6 | } | |
| 72 | |||
| 73 | 2 | av_cold void ff_takdsp_init(TAKDSPContext *c) | |
| 74 | { | ||
| 75 | 2 | c->decorrelate_ls = decorrelate_ls; | |
| 76 | 2 | c->decorrelate_sr = decorrelate_sr; | |
| 77 | 2 | c->decorrelate_sm = decorrelate_sm; | |
| 78 | 2 | c->decorrelate_sf = decorrelate_sf; | |
| 79 | |||
| 80 | #if ARCH_X86 | ||
| 81 | 2 | ff_takdsp_init_x86(c); | |
| 82 | #endif | ||
| 83 | 2 | } | |
| 84 |