FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_hysteresis.c
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 0 148 0.0%
Functions: 0 13 0.0%
Branches: 0 78 0.0%

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