diff options
author | Ronald S. Bultje <rsbultje@gmail.com> | 2016-04-06 14:08:21 -0400 |
---|---|---|
committer | Ronald S. Bultje <rsbultje@gmail.com> | 2016-04-12 16:42:45 -0400 |
commit | 2e2e08a35b479c5a2049a0f7eaf20e00aa78e923 (patch) | |
tree | 9a5368429034d0875dec98b0d230b76eaccd580c /libavfilter/colorspacedsp_yuv2yuv_template.c | |
parent | d7815df40285245805d056f6113d5a4b12620c0b (diff) | |
download | ffmpeg-2e2e08a35b479c5a2049a0f7eaf20e00aa78e923.tar.gz |
lavfi: new colorspace conversion filter.
The intent here is similar to colormatrix, but it's LGPLv2.1-or-later
(instead of GPLv2.0) and supports gamma/chromaticity correction.
Diffstat (limited to 'libavfilter/colorspacedsp_yuv2yuv_template.c')
-rw-r--r-- | libavfilter/colorspacedsp_yuv2yuv_template.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/libavfilter/colorspacedsp_yuv2yuv_template.c b/libavfilter/colorspacedsp_yuv2yuv_template.c new file mode 100644 index 0000000000..8b0d33a788 --- /dev/null +++ b/libavfilter/colorspacedsp_yuv2yuv_template.c @@ -0,0 +1,98 @@ +/* + * 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], ptrdiff_t dst_stride[3], + uint8_t *_src[3], 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); + } +} |