History

avfilter: add limitdiff video filter

Paul B Mahol committed 5 years ago

Commit 32eaf401 parent 73fe19f6 files · +405 −1Browse files

Showing the changes to libavfilter/vf_limitdiff.c (1 of 6 files). Show all

Unified · Split

libavfilter/vf_limitdiff.c+370−0
@@ -0,0 +1,370 @@
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+};

Keyboard shortcuts

General

Show keyboard shortcuts
?
Focus the current search
/

Issues and pull requests

Open filters
f

Issues, pull requests and Inbox

Select next item
j↓
Select previous item
k↑
Open selected item
Enter
Dismiss filters or clear selection
Esc

Repository code

Go to file
t