FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_colorcontrast.c
Date: 2024-07-17 14:05:47
Exec Total Coverage
Lines: 0 166 0.0%
Functions: 0 7 0.0%
Branches: 0 138 0.0%

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1 /*
2 * Copyright (c) 2021 Paul B Mahol
3 *
4 * This file is part of FFmpeg.
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 <float.h>
22
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
25 #include "avfilter.h"
26 #include "drawutils.h"
27 #include "internal.h"
28 #include "video.h"
29
30 #define R 0
31 #define G 1
32 #define B 2
33
34 typedef struct ColorContrastContext {
35 const AVClass *class;
36
37 float rc, gm, by;
38 float rcw, gmw, byw;
39 float preserve;
40
41 int step;
42 int depth;
43 uint8_t rgba_map[4];
44
45 int (*do_slice)(AVFilterContext *s, void *arg,
46 int jobnr, int nb_jobs);
47 } ColorContrastContext;
48
49 static inline float lerpf(float v0, float v1, float f)
50 {
51 return v0 + (v1 - v0) * f;
52 }
53
54 #define PROCESS(max) \
55 br = (b + r) * 0.5f; \
56 gb = (g + b) * 0.5f; \
57 rg = (r + g) * 0.5f; \
58 \
59 gd = g - br; \
60 bd = b - rg; \
61 rd = r - gb; \
62 \
63 g0 = g + gd * gm; \
64 b0 = b - gd * gm; \
65 r0 = r - gd * gm; \
66 \
67 g1 = g - bd * by; \
68 b1 = b + bd * by; \
69 r1 = r - bd * by; \
70 \
71 g2 = g - rd * rc; \
72 b2 = b - rd * rc; \
73 r2 = r + rd * rc; \
74 \
75 ng = av_clipf((g0 * gmw + g1 * byw + g2 * rcw) * scale, 0.f, max); \
76 nb = av_clipf((b0 * gmw + b1 * byw + b2 * rcw) * scale, 0.f, max); \
77 nr = av_clipf((r0 * gmw + r1 * byw + r2 * rcw) * scale, 0.f, max); \
78 \
79 li = FFMAX3(r, g, b) + FFMIN3(r, g, b); \
80 lo = FFMAX3(nr, ng, nb) + FFMIN3(nr, ng, nb) + FLT_EPSILON; \
81 lf = li / lo; \
82 \
83 r = nr * lf; \
84 g = ng * lf; \
85 b = nb * lf; \
86 \
87 nr = lerpf(nr, r, preserve); \
88 ng = lerpf(ng, g, preserve); \
89 nb = lerpf(nb, b, preserve);
90
91 static int colorcontrast_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
92 {
93 ColorContrastContext *s = ctx->priv;
94 AVFrame *frame = arg;
95 const int width = frame->width;
96 const int height = frame->height;
97 const int slice_start = (height * jobnr) / nb_jobs;
98 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
99 const ptrdiff_t glinesize = frame->linesize[0];
100 const ptrdiff_t blinesize = frame->linesize[1];
101 const ptrdiff_t rlinesize = frame->linesize[2];
102 uint8_t *gptr = frame->data[0] + slice_start * glinesize;
103 uint8_t *bptr = frame->data[1] + slice_start * blinesize;
104 uint8_t *rptr = frame->data[2] + slice_start * rlinesize;
105 const float preserve = s->preserve;
106 const float gm = s->gm * 0.5f;
107 const float by = s->by * 0.5f;
108 const float rc = s->rc * 0.5f;
109 const float gmw = s->gmw;
110 const float byw = s->byw;
111 const float rcw = s->rcw;
112 const float sum = gmw + byw + rcw;
113 const float scale = 1.f / sum;
114
115 for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
116 for (int x = 0; x < width; x++) {
117 float g = gptr[x];
118 float b = bptr[x];
119 float r = rptr[x];
120 float g0, g1, g2;
121 float b0, b1, b2;
122 float r0, r1, r2;
123 float gd, bd, rd;
124 float gb, br, rg;
125 float nr, ng, nb;
126 float li, lo, lf;
127
128 PROCESS(255.f);
129
130 gptr[x] = av_clip_uint8(ng);
131 bptr[x] = av_clip_uint8(nb);
132 rptr[x] = av_clip_uint8(nr);
133 }
134
135 gptr += glinesize;
136 bptr += blinesize;
137 rptr += rlinesize;
138 }
139
140 return 0;
141 }
142
143 static int colorcontrast_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
144 {
145 ColorContrastContext *s = ctx->priv;
146 AVFrame *frame = arg;
147 const int depth = s->depth;
148 const float max = (1 << depth) - 1;
149 const int width = frame->width;
150 const int height = frame->height;
151 const int slice_start = (height * jobnr) / nb_jobs;
152 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
153 const ptrdiff_t glinesize = frame->linesize[0] / 2;
154 const ptrdiff_t blinesize = frame->linesize[1] / 2;
155 const ptrdiff_t rlinesize = frame->linesize[2] / 2;
156 uint16_t *gptr = (uint16_t *)frame->data[0] + slice_start * glinesize;
157 uint16_t *bptr = (uint16_t *)frame->data[1] + slice_start * blinesize;
158 uint16_t *rptr = (uint16_t *)frame->data[2] + slice_start * rlinesize;
159 const float preserve = s->preserve;
160 const float gm = s->gm * 0.5f;
161 const float by = s->by * 0.5f;
162 const float rc = s->rc * 0.5f;
163 const float gmw = s->gmw;
164 const float byw = s->byw;
165 const float rcw = s->rcw;
166 const float sum = gmw + byw + rcw;
167 const float scale = 1.f / sum;
168
169 for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
170 for (int x = 0; x < width; x++) {
171 float g = gptr[x];
172 float b = bptr[x];
173 float r = rptr[x];
174 float g0, g1, g2;
175 float b0, b1, b2;
176 float r0, r1, r2;
177 float gd, bd, rd;
178 float gb, br, rg;
179 float nr, ng, nb;
180 float li, lo, lf;
181
182 PROCESS(max);
183
184 gptr[x] = av_clip_uintp2_c(ng, depth);
185 bptr[x] = av_clip_uintp2_c(nb, depth);
186 rptr[x] = av_clip_uintp2_c(nr, depth);
187 }
188
189 gptr += glinesize;
190 bptr += blinesize;
191 rptr += rlinesize;
192 }
193
194 return 0;
195 }
196
197 static int colorcontrast_slice8p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
198 {
199 ColorContrastContext *s = ctx->priv;
200 AVFrame *frame = arg;
201 const int step = s->step;
202 const int width = frame->width;
203 const int height = frame->height;
204 const int slice_start = (height * jobnr) / nb_jobs;
205 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
206 const ptrdiff_t linesize = frame->linesize[0];
207 const uint8_t roffset = s->rgba_map[R];
208 const uint8_t goffset = s->rgba_map[G];
209 const uint8_t boffset = s->rgba_map[B];
210 uint8_t *ptr = frame->data[0] + slice_start * linesize;
211 const float preserve = s->preserve;
212 const float gm = s->gm * 0.5f;
213 const float by = s->by * 0.5f;
214 const float rc = s->rc * 0.5f;
215 const float gmw = s->gmw;
216 const float byw = s->byw;
217 const float rcw = s->rcw;
218 const float sum = gmw + byw + rcw;
219 const float scale = 1.f / sum;
220
221 for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
222 for (int x = 0; x < width; x++) {
223 float g = ptr[x * step + goffset];
224 float b = ptr[x * step + boffset];
225 float r = ptr[x * step + roffset];
226 float g0, g1, g2;
227 float b0, b1, b2;
228 float r0, r1, r2;
229 float gd, bd, rd;
230 float gb, br, rg;
231 float nr, ng, nb;
232 float li, lo, lf;
233
234 PROCESS(255.f);
235
236 ptr[x * step + goffset] = av_clip_uint8(ng);
237 ptr[x * step + boffset] = av_clip_uint8(nb);
238 ptr[x * step + roffset] = av_clip_uint8(nr);
239 }
240
241 ptr += linesize;
242 }
243
244 return 0;
245 }
246
247 static int colorcontrast_slice16p(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
248 {
249 ColorContrastContext *s = ctx->priv;
250 AVFrame *frame = arg;
251 const int step = s->step;
252 const int depth = s->depth;
253 const float max = (1 << depth) - 1;
254 const int width = frame->width;
255 const int height = frame->height;
256 const int slice_start = (height * jobnr) / nb_jobs;
257 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
258 const ptrdiff_t linesize = frame->linesize[0] / 2;
259 const uint8_t roffset = s->rgba_map[R];
260 const uint8_t goffset = s->rgba_map[G];
261 const uint8_t boffset = s->rgba_map[B];
262 uint16_t *ptr = (uint16_t *)frame->data[0] + slice_start * linesize;
263 const float preserve = s->preserve;
264 const float gm = s->gm * 0.5f;
265 const float by = s->by * 0.5f;
266 const float rc = s->rc * 0.5f;
267 const float gmw = s->gmw;
268 const float byw = s->byw;
269 const float rcw = s->rcw;
270 const float sum = gmw + byw + rcw;
271 const float scale = 1.f / sum;
272
273 for (int y = slice_start; y < slice_end && sum > FLT_EPSILON; y++) {
274 for (int x = 0; x < width; x++) {
275 float g = ptr[x * step + goffset];
276 float b = ptr[x * step + boffset];
277 float r = ptr[x * step + roffset];
278 float g0, g1, g2;
279 float b0, b1, b2;
280 float r0, r1, r2;
281 float gd, bd, rd;
282 float gb, br, rg;
283 float nr, ng, nb;
284 float li, lo, lf;
285
286 PROCESS(max);
287
288 ptr[x * step + goffset] = av_clip_uintp2_c(ng, depth);
289 ptr[x * step + boffset] = av_clip_uintp2_c(nb, depth);
290 ptr[x * step + roffset] = av_clip_uintp2_c(nr, depth);
291 }
292
293 ptr += linesize;
294 }
295
296 return 0;
297 }
298
299 static int filter_frame(AVFilterLink *link, AVFrame *frame)
300 {
301 AVFilterContext *ctx = link->dst;
302 ColorContrastContext *s = ctx->priv;
303 int res;
304
305 if (res = ff_filter_execute(ctx, s->do_slice, frame, NULL,
306 FFMIN(frame->height, ff_filter_get_nb_threads(ctx))))
307 return res;
308
309 return ff_filter_frame(ctx->outputs[0], frame);
310 }
311
312 static const enum AVPixelFormat pixel_fmts[] = {
313 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
314 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
315 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
316 AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR,
317 AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0,
318 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
319 AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
320 AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
321 AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
322 AV_PIX_FMT_RGB48, AV_PIX_FMT_BGR48,
323 AV_PIX_FMT_RGBA64, AV_PIX_FMT_BGRA64,
324 AV_PIX_FMT_NONE
325 };
326
327 static av_cold int config_input(AVFilterLink *inlink)
328 {
329 AVFilterContext *ctx = inlink->dst;
330 ColorContrastContext *s = ctx->priv;
331 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
332 int planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
333
334 s->step = desc->nb_components;
335 if (inlink->format == AV_PIX_FMT_RGB0 ||
336 inlink->format == AV_PIX_FMT_0RGB ||
337 inlink->format == AV_PIX_FMT_BGR0 ||
338 inlink->format == AV_PIX_FMT_0BGR)
339 s->step = 4;
340
341 s->depth = desc->comp[0].depth;
342 s->do_slice = s->depth <= 8 ? colorcontrast_slice8 : colorcontrast_slice16;
343 if (!planar)
344 s->do_slice = s->depth <= 8 ? colorcontrast_slice8p : colorcontrast_slice16p;
345
346 ff_fill_rgba_map(s->rgba_map, inlink->format);
347
348 return 0;
349 }
350
351 static const AVFilterPad colorcontrast_inputs[] = {
352 {
353 .name = "default",
354 .type = AVMEDIA_TYPE_VIDEO,
355 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
356 .filter_frame = filter_frame,
357 .config_props = config_input,
358 },
359 };
360
361 #define OFFSET(x) offsetof(ColorContrastContext, x)
362 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
363
364 static const AVOption colorcontrast_options[] = {
365 { "rc", "set the red-cyan contrast", OFFSET(rc), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
366 { "gm", "set the green-magenta contrast", OFFSET(gm), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
367 { "by", "set the blue-yellow contrast", OFFSET(by), AV_OPT_TYPE_FLOAT, {.dbl=0}, -1, 1, VF },
368 { "rcw", "set the red-cyan weight", OFFSET(rcw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
369 { "gmw", "set the green-magenta weight", OFFSET(gmw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
370 { "byw", "set the blue-yellow weight", OFFSET(byw), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
371 { "pl", "set the amount of preserving lightness", OFFSET(preserve), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
372 { NULL }
373 };
374
375 AVFILTER_DEFINE_CLASS(colorcontrast);
376
377 const AVFilter ff_vf_colorcontrast = {
378 .name = "colorcontrast",
379 .description = NULL_IF_CONFIG_SMALL("Adjust color contrast between RGB components."),
380 .priv_size = sizeof(ColorContrastContext),
381 .priv_class = &colorcontrast_class,
382 FILTER_INPUTS(colorcontrast_inputs),
383 FILTER_OUTPUTS(ff_video_default_filterpad),
384 FILTER_PIXFMTS_ARRAY(pixel_fmts),
385 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
386 .process_command = ff_filter_process_command,
387 };
388