| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC | ||
| 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 <stdint.h> | ||
| 22 | |||
| 23 | #include "libavutil/attributes.h" | ||
| 24 | #include "exrdsp.h" | ||
| 25 | #include "config.h" | ||
| 26 | |||
| 27 | 17704 | static void reorder_pixels_scalar(uint8_t *dst, const uint8_t *src, ptrdiff_t size) | |
| 28 | { | ||
| 29 | 17704 | const uint8_t *t1 = src; | |
| 30 | 17704 | int half_size = size / 2; | |
| 31 | 17704 | const uint8_t *t2 = src + half_size; | |
| 32 | 17704 | uint8_t *s = dst; | |
| 33 | int i; | ||
| 34 | |||
| 35 |
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59041596 | for (i = 0; i < half_size; i++) { |
| 36 | 59023892 | *(s++) = *(t1++); | |
| 37 | 59023892 | *(s++) = *(t2++); | |
| 38 | } | ||
| 39 | 17704 | } | |
| 40 | |||
| 41 | 17704 | static void predictor_scalar(uint8_t *src, ptrdiff_t size) | |
| 42 | { | ||
| 43 | /* Unrolled: `src[i + 1] += src[i] - 128;` */ | ||
| 44 |
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17704 | if ((size & 1) == 0) { |
| 45 | 17704 | src[1] += src[0] ^ 0x80; | |
| 46 | 17704 | src++; | |
| 47 | 17704 | size--; | |
| 48 | } | ||
| 49 | |||
| 50 |
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59023892 | for (ptrdiff_t i = 1; i < size; i += 2) { |
| 51 | 59006188 | uint8_t a = src[i] + src[i - 1]; | |
| 52 | |||
| 53 | 59006188 | src[i] = a; | |
| 54 | 59006188 | src[i + 1] += a; | |
| 55 | 59006188 | src[i] ^= 0x80; | |
| 56 | } | ||
| 57 | 17704 | } | |
| 58 | |||
| 59 | 185 | av_cold void ff_exrdsp_init(ExrDSPContext *c) | |
| 60 | { | ||
| 61 | 185 | c->reorder_pixels = reorder_pixels_scalar; | |
| 62 | 185 | c->predictor = predictor_scalar; | |
| 63 | |||
| 64 | #if ARCH_RISCV | ||
| 65 | ff_exrdsp_init_riscv(c); | ||
| 66 | #elif ARCH_X86 | ||
| 67 | 185 | ff_exrdsp_init_x86(c); | |
| 68 | #endif | ||
| 69 | 185 | } | |
| 70 |