| /* |
| * Copyright (c) 2016 Ronald S. Bultje <rsbultje@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * 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 "libavutil/avassert.h" |
| |
| #undef opixel |
| #define opixel pixel |
| |
| #undef ipixel |
| #if IN_BIT_DEPTH == 8 |
| #define ipixel uint8_t |
| #else |
| #define ipixel uint16_t |
| #endif |
| |
| #undef fn |
| #undef fn2 |
| #undef fn3 |
| #define fn3(a,b,c,d) a##_##d##p##b##to##c##_c |
| #define fn2(a,b,c,d) fn3(a,b,c,d) |
| #define fn(a) fn2(a, IN_BIT_DEPTH, OUT_BIT_DEPTH, ss) |
| |
| static void fn(yuv2yuv)(uint8_t *_dst[3], const ptrdiff_t dst_stride[3], |
| uint8_t *_src[3], const ptrdiff_t src_stride[3], |
| int w, int h, const int16_t c[3][3][8], |
| const int16_t yuv_offset[2][8]) |
| { |
| opixel **dst = (opixel **) _dst; |
| ipixel **src = (ipixel **) _src; |
| const ipixel *src0 = src[0], *src1 = src[1], *src2 = src[2]; |
| opixel *dst0 = dst[0], *dst1 = dst[1], *dst2 = dst[2]; |
| int y, x; |
| const int sh = 14 + IN_BIT_DEPTH - OUT_BIT_DEPTH; |
| const int rnd = 1 << (sh - 1); |
| int y_off_in = yuv_offset[0][0]; |
| int y_off_out = yuv_offset[1][0] << sh; |
| const int uv_off_in = 128 << (IN_BIT_DEPTH - 8); |
| const int uv_off_out = rnd + (128 << (OUT_BIT_DEPTH - 8 + sh)); |
| int cyy = c[0][0][0], cyu = c[0][1][0], cyv = c[0][2][0]; |
| int cuu = c[1][1][0], cuv = c[1][2][0], cvu = c[2][1][0], cvv = c[2][2][0]; |
| |
| av_assert2(c[1][0][0] == 0); |
| av_assert2(c[2][0][0] == 0); |
| w = AV_CEIL_RSHIFT(w, SS_W); |
| h = AV_CEIL_RSHIFT(h, SS_H); |
| for (y = 0; y < h; y++) { |
| for (x = 0; x < w; x++) { |
| int y00 = src0[x << SS_W] - y_off_in; |
| #if SS_W == 1 |
| int y01 = src0[2 * x + 1] - y_off_in; |
| #if SS_H == 1 |
| int y10 = src0[src_stride[0] / sizeof(ipixel) + 2 * x] - y_off_in; |
| int y11 = src0[src_stride[0] / sizeof(ipixel) + 2 * x + 1] - y_off_in; |
| #endif |
| #endif |
| int u = src1[x] - uv_off_in, v = src2[x] - uv_off_in; |
| int uv_val = cyu * u + cyv * v + rnd + y_off_out; |
| |
| dst0[x << SS_W] = av_clip_pixel((cyy * y00 + uv_val) >> sh); |
| #if SS_W == 1 |
| dst0[x * 2 + 1] = av_clip_pixel((cyy * y01 + uv_val) >> sh); |
| #if SS_H == 1 |
| dst0[x * 2 + 0 + dst_stride[0] / sizeof(opixel)] = |
| av_clip_pixel((cyy * y10 + uv_val) >> sh); |
| dst0[x * 2 + 1 + dst_stride[0] / sizeof(opixel)] = |
| av_clip_pixel((cyy * y11 + uv_val) >> sh); |
| #endif |
| #endif |
| |
| dst1[x] = av_clip_pixel((u * cuu + v * cuv + uv_off_out) >> sh); |
| dst2[x] = av_clip_pixel((u * cvu + v * cvv + uv_off_out) >> sh); |
| } |
| |
| dst0 += (dst_stride[0] * (1 << SS_H)) / sizeof(opixel); |
| dst1 += dst_stride[1] / sizeof(opixel); |
| dst2 += dst_stride[2] / sizeof(opixel); |
| src0 += (src_stride[0] * (1 << SS_H)) / sizeof(ipixel); |
| src1 += src_stride[1] / sizeof(ipixel); |
| src2 += src_stride[2] / sizeof(ipixel); |
| } |
| } |