| /* |
| * This file is part of FFmpeg. |
| * |
| * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdint.h> |
| |
| #include "libavutil/attributes.h" |
| #include "exrdsp.h" |
| #include "config.h" |
| |
| static void reorder_pixels_scalar(uint8_t *dst, const uint8_t *src, ptrdiff_t size) |
| { |
| const uint8_t *t1 = src; |
| int half_size = size / 2; |
| const uint8_t *t2 = src + half_size; |
| uint8_t *s = dst; |
| int i; |
| |
| for (i = 0; i < half_size; i++) { |
| *(s++) = *(t1++); |
| *(s++) = *(t2++); |
| } |
| } |
| |
| static void predictor_scalar(uint8_t *src, ptrdiff_t size) |
| { |
| /* Unrolled: `src[i + 1] += src[i] - 128;` */ |
| if ((size & 1) == 0) { |
| src[1] += src[0] ^ 0x80; |
| src++; |
| size--; |
| } |
| |
| for (ptrdiff_t i = 1; i < size; i += 2) { |
| uint8_t a = src[i] + src[i - 1]; |
| |
| src[i] = a; |
| src[i + 1] += a; |
| src[i] ^= 0x80; |
| } |
| } |
| |
| av_cold void ff_exrdsp_init(ExrDSPContext *c) |
| { |
| c->reorder_pixels = reorder_pixels_scalar; |
| c->predictor = predictor_scalar; |
| |
| #if ARCH_RISCV |
| ff_exrdsp_init_riscv(c); |
| #elif ARCH_X86 |
| ff_exrdsp_init_x86(c); |
| #endif |
| } |