FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_monochrome.c
Date: 2024-04-26 14:42:52
Exec Total Coverage
Lines: 0 125 0.0%
Functions: 0 8 0.0%
Branches: 0 24 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 "internal.h"
27 #include "video.h"
28
29 typedef struct MonochromeContext {
30 const AVClass *class;
31
32 float b, r;
33 float size;
34 float high;
35
36 int depth;
37 int subw, subh;
38
39 int (*do_slice)(AVFilterContext *s, void *arg,
40 int jobnr, int nb_jobs);
41 int (*clear_uv)(AVFilterContext *s, void *arg,
42 int jobnr, int nb_jobs);
43 } MonochromeContext;
44
45 static float envelope(const float x)
46 {
47 const float beta = 0.6f;
48
49 if (x < beta) {
50 const float tmp = fabsf(x / beta - 1.f);
51
52 return 1.f - tmp * tmp;
53 } else {
54 const float tmp = (1.f - x) / (1.f - beta);
55
56 return tmp * tmp * (3.f - 2.f * tmp);
57 }
58 }
59
60 static float filter(float b, float r, float u, float v, float size)
61 {
62 return expf(-av_clipf(((b - u) * (b - u) +
63 (r - v) * (r - v)) *
64 size, 0.f, 1.f));
65 }
66
67 #define PROCESS() \
68 const int cx = x >> subw; \
69 float y = yptr[x] * imax; \
70 float u = uptr[cx] * imax - .5f; \
71 float v = vptr[cx] * imax - .5f; \
72 float tt, t, ny; \
73 \
74 ny = filter(b, r, u, v, size); \
75 tt = envelope(y); \
76 t = tt + (1.f - tt) * ihigh; \
77 ny = (1.f - t) * y + t * ny * y;
78
79 static int monochrome_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
80 {
81 MonochromeContext *s = ctx->priv;
82 AVFrame *frame = arg;
83 const int depth = s->depth;
84 const int subw = s->subw;
85 const int subh = s->subh;
86 const float max = (1 << depth) - 1;
87 const float imax = 1.f / max;
88 const int width = frame->width;
89 const int height = frame->height;
90 const int slice_start = (height * jobnr) / nb_jobs;
91 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
92 const ptrdiff_t ylinesize = frame->linesize[0];
93 const ptrdiff_t ulinesize = frame->linesize[1];
94 const ptrdiff_t vlinesize = frame->linesize[2];
95 uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
96 const float ihigh = 1.f - s->high;
97 const float size = 1.f / s->size;
98 const float b = s->b * .5f;
99 const float r = s->r * .5f;
100
101 for (int y = slice_start; y < slice_end; y++) {
102 const int cy = y >> subh;
103 uint8_t *uptr = frame->data[1] + cy * ulinesize;
104 uint8_t *vptr = frame->data[2] + cy * vlinesize;
105
106 for (int x = 0; x < width; x++) {
107 PROCESS()
108
109 yptr[x] = av_clip_uint8(lrintf(ny * max));
110 }
111
112 yptr += ylinesize;
113 }
114
115 return 0;
116 }
117
118 static int monochrome_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
119 {
120 MonochromeContext *s = ctx->priv;
121 AVFrame *frame = arg;
122 const int depth = s->depth;
123 const int subw = s->subw;
124 const int subh = s->subh;
125 const float max = (1 << depth) - 1;
126 const float imax = 1.f / max;
127 const int width = frame->width;
128 const int height = frame->height;
129 const int slice_start = (height * jobnr) / nb_jobs;
130 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
131 const ptrdiff_t ylinesize = frame->linesize[0] / 2;
132 const ptrdiff_t ulinesize = frame->linesize[1] / 2;
133 const ptrdiff_t vlinesize = frame->linesize[2] / 2;
134 uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
135 const float ihigh = 1.f - s->high;
136 const float size = 1.f / s->size;
137 const float b = s->b * .5f;
138 const float r = s->r * .5f;
139
140 for (int y = slice_start; y < slice_end; y++) {
141 const int cy = y >> subh;
142 uint16_t *uptr = (uint16_t *)frame->data[1] + cy * ulinesize;
143 uint16_t *vptr = (uint16_t *)frame->data[2] + cy * vlinesize;
144
145 for (int x = 0; x < width; x++) {
146 PROCESS()
147
148 yptr[x] = av_clip_uintp2_c(lrintf(ny * max), depth);
149 }
150
151 yptr += ylinesize;
152 }
153
154 return 0;
155 }
156
157 static int clear_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
158 {
159 MonochromeContext *s = ctx->priv;
160 AVFrame *frame = arg;
161 const int depth = s->depth;
162 const int half = 1 << (depth - 1);
163 const int subw = s->subw;
164 const int subh = s->subh;
165 const int width = AV_CEIL_RSHIFT(frame->width, subw);
166 const int height = AV_CEIL_RSHIFT(frame->height, subh);
167 const int slice_start = (height * jobnr) / nb_jobs;
168 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
169 const ptrdiff_t ulinesize = frame->linesize[1];
170 const ptrdiff_t vlinesize = frame->linesize[2];
171
172 for (int y = slice_start; y < slice_end; y++) {
173 uint8_t *uptr = frame->data[1] + y * ulinesize;
174 uint8_t *vptr = frame->data[2] + y * vlinesize;
175
176 memset(uptr, half, width);
177 memset(vptr, half, width);
178 }
179
180 return 0;
181 }
182
183 static int clear_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
184 {
185 MonochromeContext *s = ctx->priv;
186 AVFrame *frame = arg;
187 const int depth = s->depth;
188 const int half = 1 << (depth - 1);
189 const int subw = s->subw;
190 const int subh = s->subh;
191 const int width = AV_CEIL_RSHIFT(frame->width, subw);
192 const int height = AV_CEIL_RSHIFT(frame->height, subh);
193 const int slice_start = (height * jobnr) / nb_jobs;
194 const int slice_end = (height * (jobnr + 1)) / nb_jobs;
195 const ptrdiff_t ulinesize = frame->linesize[1] / 2;
196 const ptrdiff_t vlinesize = frame->linesize[2] / 2;
197
198 for (int y = slice_start; y < slice_end; y++) {
199 uint16_t *uptr = (uint16_t *)frame->data[1] + y * ulinesize;
200 uint16_t *vptr = (uint16_t *)frame->data[2] + y * vlinesize;
201
202 for (int x = 0; x < width; x++) {
203 uptr[x] = half;
204 vptr[x] = half;
205 }
206 }
207
208 return 0;
209 }
210
211 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
212 {
213 AVFilterContext *ctx = inlink->dst;
214 MonochromeContext *s = ctx->priv;
215
216 ff_filter_execute(ctx, s->do_slice, frame, NULL,
217 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
218 ff_filter_execute(ctx, s->clear_uv, frame, NULL,
219 FFMIN(frame->height >> s->subh, ff_filter_get_nb_threads(ctx)));
220
221 return ff_filter_frame(ctx->outputs[0], frame);
222 }
223
224 static const enum AVPixelFormat pixel_fmts[] = {
225 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
226 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
227 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
228 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
229 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
230 AV_PIX_FMT_YUVJ411P,
231 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
232 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
233 AV_PIX_FMT_YUV440P10,
234 AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
235 AV_PIX_FMT_YUV440P12,
236 AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
237 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
238 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
239 AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
240 AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
241 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
242 AV_PIX_FMT_NONE
243 };
244
245 static av_cold int config_input(AVFilterLink *inlink)
246 {
247 AVFilterContext *ctx = inlink->dst;
248 MonochromeContext *s = ctx->priv;
249 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
250
251 s->depth = desc->comp[0].depth;
252 s->do_slice = s->depth <= 8 ? monochrome_slice8 : monochrome_slice16;
253 s->clear_uv = s->depth <= 8 ? clear_slice8 : clear_slice16;
254 s->subw = desc->log2_chroma_w;
255 s->subh = desc->log2_chroma_h;
256
257 return 0;
258 }
259
260 static const AVFilterPad monochrome_inputs[] = {
261 {
262 .name = "default",
263 .type = AVMEDIA_TYPE_VIDEO,
264 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
265 .filter_frame = filter_frame,
266 .config_props = config_input,
267 },
268 };
269
270 #define OFFSET(x) offsetof(MonochromeContext, x)
271 #define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
272
273 static const AVOption monochrome_options[] = {
274 { "cb", "set the chroma blue spot", OFFSET(b), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
275 { "cr", "set the chroma red spot", OFFSET(r), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
276 { "size", "set the color filter size", OFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=1},.1,10, VF },
277 { "high", "set the highlights strength", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
278 { NULL }
279 };
280
281 AVFILTER_DEFINE_CLASS(monochrome);
282
283 const AVFilter ff_vf_monochrome = {
284 .name = "monochrome",
285 .description = NULL_IF_CONFIG_SMALL("Convert video to gray using custom color filter."),
286 .priv_size = sizeof(MonochromeContext),
287 .priv_class = &monochrome_class,
288 FILTER_INPUTS(monochrome_inputs),
289 FILTER_OUTPUTS(ff_video_default_filterpad),
290 FILTER_PIXFMTS_ARRAY(pixel_fmts),
291 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
292 .process_command = ff_filter_process_command,
293 };
294