FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_limitdiff.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 0 162 0.0%
Functions: 0 9 0.0%
Branches: 0 66 0.0%

Line Branch Exec Source
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 "libavutil/imgutils.h"
22 #include "libavutil/pixdesc.h"
23 #include "libavutil/opt.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28 #include "framesync.h"
29
30 typedef struct ThreadData {
31 AVFrame *filtered, *source, *reference, *dst;
32 } ThreadData;
33
34 typedef struct LimitDiffContext {
35 const AVClass *class;
36
37 float threshold;
38 float elasticity;
39 int reference;
40 int planes;
41
42 int thr1, thr2;
43
44 int linesize[4];
45 int planewidth[4], planeheight[4];
46 int nb_planes;
47 int depth;
48 FFFrameSync fs;
49
50 void (*limitdiff)(const uint8_t *filtered, uint8_t *dst,
51 const uint8_t *source, const uint8_t *reference,
52 int thr1, int thr2, int w, int depth);
53 } LimitDiffContext;
54
55 #define OFFSET(x) offsetof(LimitDiffContext, x)
56 #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
57 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
58
59 static const AVOption limitdiff_options[] = {
60 { "threshold", "set the threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=1/255.f}, 0, 1, TFLAGS },
61 { "elasticity", "set the elasticity", OFFSET(elasticity), AV_OPT_TYPE_FLOAT, {.dbl=2.f}, 0, 10, TFLAGS },
62 { "reference", "enable reference stream", OFFSET(reference), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
63 { "planes", "set the planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, TFLAGS },
64 { NULL }
65 };
66
67 static const enum AVPixelFormat pix_fmts[] = {
68 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
69 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
70 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
71 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
72 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
73 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
74 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
75 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
76 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
77 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
78 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
79 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
80 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
81 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
82 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
83 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
84 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
85 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
86 AV_PIX_FMT_NONE
87 };
88
89 static void limitdiff8(const uint8_t *filtered, uint8_t *dst,
90 const uint8_t *source, const uint8_t *reference,
91 int thr1, int thr2, int w, int depth)
92 {
93 for (int x = 0; x < w; x++) {
94 const int diff = filtered[x] - source[x];
95 const int diff_ref = FFABS(filtered[x] - reference[x]);
96
97 if (diff_ref <= thr1)
98 dst[x] = filtered[x];
99 else if (diff_ref >= thr2)
100 dst[x] = source[x];
101 else
102 dst[x] = av_clip_uint8(source[x] + diff * (thr2 - diff_ref) / (thr2 - thr1));
103 }
104 }
105
106 static void limitdiff16(const uint8_t *ffiltered, uint8_t *ddst,
107 const uint8_t *ssource, const uint8_t *rreference,
108 int thr1, int thr2, int w, int depth)
109 {
110 const uint16_t *source = (const uint16_t *)ssource;
111 const uint16_t *filtered = (const uint16_t *)ffiltered;
112 const uint16_t *reference = (const uint16_t *)rreference;
113 uint16_t *dst = (uint16_t *)ddst;
114
115 for (int x = 0; x < w; x++) {
116 const int diff = filtered[x] - source[x];
117 const int diff_ref = FFABS(filtered[x] - reference[x]);
118
119 if (diff_ref <= thr1)
120 dst[x] = filtered[x];
121 else if (diff_ref >= thr2)
122 dst[x] = source[x];
123 else
124 dst[x] = av_clip_uintp2_c(source[x] + diff * (thr2 - diff_ref) / (thr2 - thr1), depth);
125 }
126 }
127
128 static int config_input(AVFilterLink *inlink)
129 {
130 AVFilterContext *ctx = inlink->dst;
131 LimitDiffContext *s = ctx->priv;
132 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
133 int vsub, hsub, ret;
134
135 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
136
137 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
138 return ret;
139
140 hsub = desc->log2_chroma_w;
141 vsub = desc->log2_chroma_h;
142 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
143 s->planeheight[0] = s->planeheight[3] = inlink->h;
144 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
145 s->planewidth[0] = s->planewidth[3] = inlink->w;
146
147 s->depth = desc->comp[0].depth;
148 s->thr1 = s->threshold * ((1 << s->depth) - 1);
149 s->thr2 = s->thr1 * s->elasticity;
150
151 if (desc->comp[0].depth == 8)
152 s->limitdiff = limitdiff8;
153 else
154 s->limitdiff = limitdiff16;
155
156 return 0;
157 }
158
159 static int limitdiff_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
160 {
161 LimitDiffContext *s = ctx->priv;
162 const int depth = s->depth;
163 ThreadData *td = arg;
164
165 for (int p = 0; p < s->nb_planes; p++) {
166 const ptrdiff_t filtered_linesize = td->filtered->linesize[p];
167 const ptrdiff_t source_linesize = td->source->linesize[p];
168 const ptrdiff_t reference_linesize = td->reference->linesize[p];
169 const ptrdiff_t dst_linesize = td->dst->linesize[p];
170 const int thr1 = s->thr1;
171 const int thr2 = s->thr2;
172 const int w = s->planewidth[p];
173 const int h = s->planeheight[p];
174 const int slice_start = (h * jobnr) / nb_jobs;
175 const int slice_end = (h * (jobnr+1)) / nb_jobs;
176 const uint8_t *filtered = td->filtered->data[p] + slice_start * filtered_linesize;
177 const uint8_t *source = td->source->data[p] + slice_start * source_linesize;
178 const uint8_t *reference = td->reference->data[p] + slice_start * reference_linesize;
179 uint8_t *dst = td->dst->data[p] + slice_start * dst_linesize;
180
181 if (!((1 << p) & s->planes)) {
182 av_image_copy_plane(dst, dst_linesize, filtered, filtered_linesize,
183 s->linesize[p], slice_end - slice_start);
184 continue;
185 }
186
187 for (int y = slice_start; y < slice_end; y++) {
188 s->limitdiff(filtered, dst, source, reference, thr1, thr2, w, depth);
189
190 dst += dst_linesize;
191 filtered += filtered_linesize;
192 source += source_linesize;
193 reference += reference_linesize;
194 }
195 }
196
197 return 0;
198 }
199
200 static int process_frame(FFFrameSync *fs)
201 {
202 AVFilterContext *ctx = fs->parent;
203 LimitDiffContext *s = fs->opaque;
204 AVFilterLink *outlink = ctx->outputs[0];
205 AVFrame *out, *filtered, *source, *reference = NULL;
206 int ret;
207
208 if ((ret = ff_framesync_get_frame(&s->fs, 0, &filtered, 0)) < 0 ||
209 (ret = ff_framesync_get_frame(&s->fs, 1, &source, 0)) < 0)
210 return ret;
211 if (s->reference) {
212 if ((ret = ff_framesync_get_frame(&s->fs, 2, &reference, 0)) < 0)
213 return ret;
214 }
215
216 if (ctx->is_disabled) {
217 out = av_frame_clone(filtered);
218 if (!out)
219 return AVERROR(ENOMEM);
220 } else {
221 ThreadData td;
222
223 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
224 if (!out)
225 return AVERROR(ENOMEM);
226 av_frame_copy_props(out, filtered);
227
228 td.filtered = filtered;
229 td.source = source;
230 td.reference = reference ? reference : source;
231 td.dst = out;
232
233 ff_filter_execute(ctx, limitdiff_slice, &td, NULL,
234 FFMIN(s->planeheight[0], ff_filter_get_nb_threads(ctx)));
235 }
236 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
237
238 return ff_filter_frame(outlink, out);
239 }
240
241 static int config_output(AVFilterLink *outlink)
242 {
243 AVFilterContext *ctx = outlink->src;
244 LimitDiffContext *s = ctx->priv;
245 AVFilterLink *filtered = ctx->inputs[0];
246 AVFilterLink *source = ctx->inputs[1];
247 FFFrameSyncIn *in;
248 int ret;
249
250 if (filtered->w != source->w || filtered->h != source->h) {
251 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
252 "(size %dx%d) do not match the corresponding "
253 "second input link %s parameters (%dx%d)\n",
254 ctx->input_pads[0].name, filtered->w, filtered->h,
255 ctx->input_pads[1].name, source->w, source->h);
256 return AVERROR(EINVAL);
257 }
258
259 if (s->reference) {
260 AVFilterLink *reference = ctx->inputs[2];
261
262 if (filtered->w != reference->w || filtered->h != reference->h) {
263 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
264 "(size %dx%d) do not match the corresponding "
265 "third input link %s parameters (%dx%d)\n",
266 ctx->input_pads[0].name, filtered->w, filtered->h,
267 ctx->input_pads[1].name, reference->w, reference->h);
268 return AVERROR(EINVAL);
269 }
270 }
271
272 outlink->w = filtered->w;
273 outlink->h = filtered->h;
274 outlink->sample_aspect_ratio = filtered->sample_aspect_ratio;
275 outlink->frame_rate = filtered->frame_rate;
276
277 if ((ret = ff_framesync_init(&s->fs, ctx, 2 + !!s->reference)) < 0)
278 return ret;
279
280 in = s->fs.in;
281 in[0].time_base = filtered->time_base;
282 in[1].time_base = source->time_base;
283 if (s->reference)
284 in[2].time_base = ctx->inputs[2]->time_base;
285 in[0].sync = 1;
286 in[0].before = EXT_STOP;
287 in[0].after = EXT_INFINITY;
288 in[1].sync = 1;
289 in[1].before = EXT_STOP;
290 in[1].after = EXT_INFINITY;
291 if (s->reference) {
292 in[2].sync = 1;
293 in[2].before = EXT_STOP;
294 in[2].after = EXT_INFINITY;
295 }
296 s->fs.opaque = s;
297 s->fs.on_event = process_frame;
298
299 ret = ff_framesync_configure(&s->fs);
300 outlink->time_base = s->fs.time_base;
301
302 return ret;
303 }
304
305 static int activate(AVFilterContext *ctx)
306 {
307 LimitDiffContext *s = ctx->priv;
308 return ff_framesync_activate(&s->fs);
309 }
310
311 static av_cold int init(AVFilterContext *ctx)
312 {
313 const LimitDiffContext *s = ctx->priv;
314 AVFilterPad pad = {
315 .name = "filtered",
316 .type = AVMEDIA_TYPE_VIDEO,
317 .config_props = config_input,
318 };
319 int ret;
320
321 if ((ret = ff_append_inpad(ctx, &pad)) < 0)
322 return ret;
323
324 pad.name = "source";
325 pad.config_props = NULL;
326 if ((ret = ff_append_inpad(ctx, &pad)) < 0)
327 return ret;
328
329 if (s->reference) {
330 pad.name = "reference";
331 pad.config_props = NULL;
332 if ((ret = ff_append_inpad(ctx, &pad)) < 0)
333 return ret;
334 }
335
336 return 0;
337 }
338
339 static av_cold void uninit(AVFilterContext *ctx)
340 {
341 LimitDiffContext *s = ctx->priv;
342
343 ff_framesync_uninit(&s->fs);
344 }
345
346 static const AVFilterPad limitdiff_outputs[] = {
347 {
348 .name = "default",
349 .type = AVMEDIA_TYPE_VIDEO,
350 .config_props = config_output,
351 },
352 };
353
354 AVFILTER_DEFINE_CLASS(limitdiff);
355
356 const AVFilter ff_vf_limitdiff = {
357 .name = "limitdiff",
358 .description = NULL_IF_CONFIG_SMALL("Apply filtering with limiting difference."),
359 .priv_class = &limitdiff_class,
360 .priv_size = sizeof(LimitDiffContext),
361 .init = init,
362 .uninit = uninit,
363 .activate = activate,
364 FILTER_OUTPUTS(limitdiff_outputs),
365 FILTER_PIXFMTS_ARRAY(pix_fmts),
366 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
367 AVFILTER_FLAG_SLICE_THREADS |
368 AVFILTER_FLAG_DYNAMIC_INPUTS,
369 .process_command = ff_filter_process_command,
370 };
371