2 * Copyright (c) 2021 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/opt.h"
24 #include "libavutil/imgutils.h"
30 typedef struct ColorCorrectContext {
39 int (*do_slice)(AVFilterContext *s, void *arg,
40 int jobnr, int nb_jobs);
41 } ColorCorrectContext;
44 float y = yptr[x] * imax; \
45 float u = uptr[x] * imax - .5f; \
46 float v = vptr[x] * imax - .5f; \
50 nu = saturation * (u + y * bd + bl); \
51 nv = saturation * (v + y * rd + rl);
53 static int colorcorrect_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
55 ColorCorrectContext *s = ctx->priv;
57 const int depth = s->depth;
58 const float max = (1 << depth) - 1;
59 const float imax = 1.f / max;
60 const int width = frame->width;
61 const int height = frame->height;
62 const int slice_start = (height * jobnr) / nb_jobs;
63 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
64 const int ylinesize = frame->linesize[0];
65 const int ulinesize = frame->linesize[1];
66 const int vlinesize = frame->linesize[2];
67 uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
68 uint8_t *uptr = frame->data[1] + slice_start * ulinesize;
69 uint8_t *vptr = frame->data[2] + slice_start * vlinesize;
70 const float saturation = s->saturation;
71 const float bl = s->bl;
72 const float rl = s->rl;
73 const float bd = s->bh - bl;
74 const float rd = s->rh - rl;
76 for (int y = slice_start; y < slice_end; y++) {
77 for (int x = 0; x < width; x++) {
80 yptr[x] = av_clip_uint8( ny * max);
81 uptr[x] = av_clip_uint8((nu + 0.5f) * max);
82 vptr[x] = av_clip_uint8((nv + 0.5f) * max);
93 static int colorcorrect_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
95 ColorCorrectContext *s = ctx->priv;
97 const int depth = s->depth;
98 const float max = (1 << depth) - 1;
99 const float imax = 1.f / max;
100 const int width = frame->width;
101 const int height = frame->height;
102 const int slice_start = (height * jobnr) / nb_jobs;
103 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
104 const int ylinesize = frame->linesize[0] / 2;
105 const int ulinesize = frame->linesize[1] / 2;
106 const int vlinesize = frame->linesize[2] / 2;
107 uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
108 uint16_t *uptr = (uint16_t *)frame->data[1] + slice_start * ulinesize;
109 uint16_t *vptr = (uint16_t *)frame->data[2] + slice_start * vlinesize;
110 const float saturation = s->saturation;
111 const float bl = s->bl;
112 const float rl = s->rl;
113 const float bd = s->bh - bl;
114 const float rd = s->rh - rl;
116 for (int y = slice_start; y < slice_end; y++) {
117 for (int x = 0; x < width; x++) {
120 yptr[x] = av_clip_uintp2_c( ny * max, depth);
121 uptr[x] = av_clip_uintp2_c((nu + 0.5f) * max, depth);
122 vptr[x] = av_clip_uintp2_c((nv + 0.5f) * max, depth);
133 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
135 AVFilterContext *ctx = inlink->dst;
136 ColorCorrectContext *s = ctx->priv;
138 ctx->internal->execute(ctx, s->do_slice, frame, NULL,
139 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
141 return ff_filter_frame(ctx->outputs[0], frame);
144 static av_cold int query_formats(AVFilterContext *ctx)
146 static const enum AVPixelFormat pixel_fmts[] = {
147 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
148 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV444P16,
149 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
153 AVFilterFormats *formats = NULL;
155 formats = ff_make_format_list(pixel_fmts);
157 return AVERROR(ENOMEM);
159 return ff_set_common_formats(ctx, formats);
162 static av_cold int config_input(AVFilterLink *inlink)
164 AVFilterContext *ctx = inlink->dst;
165 ColorCorrectContext *s = ctx->priv;
166 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
168 s->depth = desc->comp[0].depth;
169 s->do_slice = s->depth <= 8 ? colorcorrect_slice8 : colorcorrect_slice16;
174 static const AVFilterPad colorcorrect_inputs[] = {
177 .type = AVMEDIA_TYPE_VIDEO,
179 .filter_frame = filter_frame,
180 .config_props = config_input,
185 static const AVFilterPad colorcorrect_outputs[] = {
188 .type = AVMEDIA_TYPE_VIDEO,
193 #define OFFSET(x) offsetof(ColorCorrectContext, x)
194 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
196 static const AVOption colorcorrect_options[] = {
197 { "rl", "set the red shadow spot", OFFSET(rl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
198 { "bl", "set the blue shadow spot", OFFSET(bl), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
199 { "rh", "set the red highlight spot", OFFSET(rh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
200 { "bh", "set the blue highlight spot", OFFSET(bh), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
201 { "saturation", "set the amount of saturation", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl=1}, -3, 3, VF },
205 AVFILTER_DEFINE_CLASS(colorcorrect);
207 const AVFilter ff_vf_colorcorrect = {
208 .name = "colorcorrect",
209 .description = NULL_IF_CONFIG_SMALL("Adjust color white balance selectively for blacks and whites."),
210 .priv_size = sizeof(ColorCorrectContext),
211 .priv_class = &colorcorrect_class,
212 .query_formats = query_formats,
213 .inputs = colorcorrect_inputs,
214 .outputs = colorcorrect_outputs,
215 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
216 .process_command = ff_filter_process_command,