FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_hysteresis.c
Date: 2026-04-30 13:16:32
Exec Total Coverage
Lines: 0 150 0.0%
Functions: 0 13 0.0%
Branches: 0 78 0.0%
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1 /*
2 * Copyright (c) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
3 * Copyright (c) 2016 Paul B Mahol
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/imgutils.h"
23 #include "libavutil/mem.h"
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/opt.h"
26 #include "avfilter.h"
27 #include "filters.h"
28 #include "video.h"
29 #include "framesync.h"
30
31 #define OFFSET(x) offsetof(HysteresisContext, x)
32 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
33
34 typedef struct HysteresisContext {
35 const AVClass *class;
36 FFFrameSync fs;
37
38 int planes;
39 int threshold;
40
41 int width[4], height[4];
42 int nb_planes;
43 int depth;
44
45 uint8_t *map;
46 uint32_t *xy;
47 int index;
48
49 void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
50 ptrdiff_t blinesize, ptrdiff_t olinesize,
51 ptrdiff_t destlinesize,
52 int w, int h);
53 } HysteresisContext;
54
55 static const AVOption hysteresis_options[] = {
56 { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
57 { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
58 { NULL }
59 };
60
61 static const enum AVPixelFormat pix_fmts[] = {
62 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
63 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
64 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
65 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
66 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
67 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
68 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
69 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
70 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
71 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
72 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
73 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
74 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
75 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
76 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
77 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
78 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
79 AV_PIX_FMT_NONE
80 };
81
82 ✗ static int process_frame(FFFrameSync *fs)
83 {
84 ✗ AVFilterContext *ctx = fs->parent;
85 ✗ HysteresisContext *s = fs->opaque;
86 ✗ AVFilterLink *outlink = ctx->outputs[0];
87 AVFrame *out, *base, *alt;
88 int ret;
89
90 ✗ if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
91 ✗ (ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
92 ✗ return ret;
93
94 ✗ if (ctx->is_disabled) {
95 ✗ out = av_frame_clone(base);
96 ✗ if (!out)
97 ✗ return AVERROR(ENOMEM);
98 } else {
99 int p;
100
101 ✗ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
102 ✗ if (!out)
103 ✗ return AVERROR(ENOMEM);
104 ✗ av_frame_copy_props(out, base);
105
106 ✗ for (p = 0; p < s->nb_planes; p++) {
107 ✗ if (!((1 << p) & s->planes)) {
108 ✗ av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
109 s->width[p], s->height[p]);
110 ✗ continue;
111 } else {
112 int y;
113
114 ✗ for (y = 0; y < s->height[p]; y++) {
115 ✗ memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
116 }
117 }
118
119 ✗ s->index = -1;
120 ✗ memset(s->map, 0, s->width[0] * s->height[0]);
121 ✗ memset(s->xy, 0, s->width[0] * s->height[0] * 4);
122
123 ✗ s->hysteresis(s, base->data[p], alt->data[p],
124 out->data[p],
125 ✗ base->linesize[p], alt->linesize[p],
126 ✗ out->linesize[p],
127 s->width[p], s->height[p]);
128 }
129 }
130 ✗ out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
131
132 ✗ return ff_filter_frame(outlink, out);
133 }
134
135 ✗ static int passed(HysteresisContext *s, int x, int y, int w)
136 {
137 ✗ return s->map[x + y * w];
138 }
139
140 ✗ static void push(HysteresisContext *s, int x, int y, int w)
141 {
142 ✗ s->map[x + y * w] = 0xff;
143 ✗ s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
144 ✗ }
145
146 ✗ static void pop(HysteresisContext *s, int *x, int *y)
147 {
148 ✗ uint32_t val = s->xy[s->index--];
149
150 ✗ *x = val >> 16;
151 ✗ *y = val & 0x0000FFFF;
152 ✗ }
153
154 ✗ static int is_empty(HysteresisContext *s)
155 {
156 ✗ return s->index < 0;
157 }
158
159 ✗ static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
160 uint8_t *dst,
161 ptrdiff_t blinesize, ptrdiff_t alinesize,
162 ptrdiff_t dlinesize,
163 int w, int h)
164 {
165 ✗ const int t = s->threshold;
166 int x, y;
167
168 ✗ for (y = 0; y < h; y++) {
169 ✗ for (x = 0; x < w; x++) {
170 ✗ if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
171 int posx, posy;
172
173 ✗ dst[x + y * dlinesize] = asrc[x + y * alinesize];
174
175 ✗ push(s, x, y, w);
176
177 ✗ while (!is_empty(s)) {
178 int x_min, x_max, y_min, y_max, yy, xx;
179
180 ✗ pop(s, &posx, &posy);
181
182 ✗ x_min = posx > 0 ? posx - 1 : 0;
183 ✗ x_max = posx < w - 1 ? posx + 1 : posx;
184 ✗ y_min = posy > 0 ? posy - 1 : 0;
185 ✗ y_max = posy < h - 1 ? posy + 1 : posy;
186
187 ✗ for (yy = y_min; yy <= y_max; yy++) {
188 ✗ for (xx = x_min; xx <= x_max; xx++) {
189 ✗ if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
190 ✗ dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
191 ✗ push(s, xx, yy, w);
192 }
193 }
194 }
195 }
196 }
197 }
198 }
199 ✗ }
200
201 ✗ static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
202 uint8_t *ddst,
203 ptrdiff_t blinesize, ptrdiff_t alinesize,
204 ptrdiff_t dlinesize,
205 int w, int h)
206 {
207 ✗ const uint16_t *bsrc = (const uint16_t *)bbsrc;
208 ✗ const uint16_t *asrc = (const uint16_t *)aasrc;
209 ✗ uint16_t *dst = (uint16_t *)ddst;
210 ✗ const int t = s->threshold;
211 int x, y;
212
213 ✗ blinesize /= 2;
214 ✗ alinesize /= 2;
215 ✗ dlinesize /= 2;
216
217 ✗ for (y = 0; y < h; y++) {
218 ✗ for (x = 0; x < w; x++) {
219 ✗ if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
220 int posx, posy;
221
222 ✗ dst[x + y * dlinesize] = asrc[x + y * alinesize];
223
224 ✗ push(s, x, y, w);
225
226 ✗ while (!is_empty(s)) {
227 int x_min, x_max, y_min, y_max, yy, xx;
228
229 ✗ pop(s, &posx, &posy);
230
231 ✗ x_min = posx > 0 ? posx - 1 : 0;
232 ✗ x_max = posx < w - 1 ? posx + 1 : posx;
233 ✗ y_min = posy > 0 ? posy - 1 : 0;
234 ✗ y_max = posy < h - 1 ? posy + 1 : posy;
235
236 ✗ for (yy = y_min; yy <= y_max; yy++) {
237 ✗ for (xx = x_min; xx <= x_max; xx++) {
238 ✗ if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
239 ✗ dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
240 ✗ push(s, xx, yy, w);
241 }
242 }
243 }
244 }
245 }
246 }
247 }
248 ✗ }
249
250 ✗ static int config_input(AVFilterLink *inlink)
251 {
252 ✗ AVFilterContext *ctx = inlink->dst;
253 ✗ HysteresisContext *s = ctx->priv;
254 ✗ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
255 int vsub, hsub;
256
257 ✗ s->nb_planes = av_pix_fmt_count_planes(inlink->format);
258
259 ✗ hsub = desc->log2_chroma_w;
260 ✗ vsub = desc->log2_chroma_h;
261 ✗ s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
262 ✗ s->height[0] = s->height[3] = inlink->h;
263 ✗ s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
264 ✗ s->width[0] = s->width[3] = inlink->w;
265
266 ✗ s->depth = desc->comp[0].depth;
267
268 ✗ if (desc->comp[0].depth == 8)
269 ✗ s->hysteresis = hysteresis8;
270 else
271 ✗ s->hysteresis = hysteresis16;
272
273 ✗ s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
274 ✗ if (!s->map)
275 ✗ return AVERROR(ENOMEM);
276
277 ✗ s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
278 ✗ if (!s->xy)
279 ✗ return AVERROR(ENOMEM);
280
281 ✗ return 0;
282 }
283
284 ✗ static int config_output(AVFilterLink *outlink)
285 {
286 ✗ AVFilterContext *ctx = outlink->src;
287 ✗ HysteresisContext *s = ctx->priv;
288 ✗ AVFilterLink *base = ctx->inputs[0];
289 ✗ AVFilterLink *alt = ctx->inputs[1];
290 ✗ FilterLink *il = ff_filter_link(base);
291 ✗ FilterLink *ol = ff_filter_link(outlink);
292 FFFrameSyncIn *in;
293 int ret;
294
295 ✗ if (base->w != alt->w || base->h != alt->h) {
296 ✗ av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
297 "(size %dx%d) do not match the corresponding "
298 "second input link %s parameters (size %dx%d)\n",
299 ✗ ctx->input_pads[0].name, base->w, base->h,
300 ✗ ctx->input_pads[1].name,
301 alt->w, alt->h);
302 ✗ return AVERROR(EINVAL);
303 }
304
305 ✗ outlink->w = base->w;
306 ✗ outlink->h = base->h;
307 ✗ outlink->sample_aspect_ratio = base->sample_aspect_ratio;
308 ✗ ol->frame_rate = il->frame_rate;
309
310 ✗ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
311 ✗ return ret;
312
313 ✗ in = s->fs.in;
314 ✗ in[0].time_base = base->time_base;
315 ✗ in[1].time_base = alt->time_base;
316 ✗ in[0].sync = 1;
317 ✗ in[0].before = EXT_STOP;
318 ✗ in[0].after = EXT_INFINITY;
319 ✗ in[1].sync = 1;
320 ✗ in[1].before = EXT_STOP;
321 ✗ in[1].after = EXT_INFINITY;
322 ✗ s->fs.opaque = s;
323 ✗ s->fs.on_event = process_frame;
324
325 ✗ ret = ff_framesync_configure(&s->fs);
326 ✗ outlink->time_base = s->fs.time_base;
327
328 ✗ return ret;
329 }
330
331 ✗ static int activate(AVFilterContext *ctx)
332 {
333 ✗ HysteresisContext *s = ctx->priv;
334 ✗ return ff_framesync_activate(&s->fs);
335 }
336
337 ✗ static av_cold void uninit(AVFilterContext *ctx)
338 {
339 ✗ HysteresisContext *s = ctx->priv;
340
341 ✗ ff_framesync_uninit(&s->fs);
342 ✗ av_freep(&s->map);
343 ✗ av_freep(&s->xy);
344 ✗ }
345
346 ✗ FRAMESYNC_DEFINE_CLASS(hysteresis, HysteresisContext, fs);
347
348 static const AVFilterPad hysteresis_inputs[] = {
349 {
350 .name = "base",
351 .type = AVMEDIA_TYPE_VIDEO,
352 .config_props = config_input,
353 },
354 {
355 .name = "alt",
356 .type = AVMEDIA_TYPE_VIDEO,
357 },
358 };
359
360 static const AVFilterPad hysteresis_outputs[] = {
361 {
362 .name = "default",
363 .type = AVMEDIA_TYPE_VIDEO,
364 .config_props = config_output,
365 },
366 };
367
368 const FFFilter ff_vf_hysteresis = {
369 .p.name = "hysteresis",
370 .p.description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
371 .p.priv_class = &hysteresis_class,
372 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
373 .preinit = hysteresis_framesync_preinit,
374 .priv_size = sizeof(HysteresisContext),
375 .uninit = uninit,
376 .activate = activate,
377 FILTER_INPUTS(hysteresis_inputs),
378 FILTER_OUTPUTS(hysteresis_outputs),
379 FILTER_PIXFMTS_ARRAY(pix_fmts),
380 };
381