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avfilter: add corr video filter

Paul B Mahol committed 3 years ago

Commit f0f19f31 parent 9ca139b6 files · +366 −1Browse files

Showing the changes to libavfilter (4 of 6 files). Show all

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4 files
  1. libavfilter/Makefile +1 −0
  2. libavfilter/allfilters.c +1 −0
  3. libavfilter/version.h +1 −1
  4. libavfilter/vf_corr.c +338 −0
libavfilter/Makefile+1−0
@@ -241,6 +241,7 @@ OBJS-$(CONFIG_CONVOLUTION_OPENCL_FILTER) += vf_convolution_opencl.o opencl.o · 240 unmodified lines
241OBJS-$(CONFIG_CONVOLVE_FILTER) += vf_convolve.o framesync.o241OBJS-$(CONFIG_CONVOLVE_FILTER) += vf_convolve.o framesync.o
242OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o242OBJS-$(CONFIG_COPY_FILTER) += vf_copy.o
243OBJS-$(CONFIG_COREIMAGE_FILTER) += vf_coreimage.o243OBJS-$(CONFIG_COREIMAGE_FILTER) += vf_coreimage.o
244OBJS-$(CONFIG_CORR_FILTER) += vf_corr.o framesync.o
244OBJS-$(CONFIG_COVER_RECT_FILTER) += vf_cover_rect.o lavfutils.o245OBJS-$(CONFIG_COVER_RECT_FILTER) += vf_cover_rect.o lavfutils.o
245OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o246OBJS-$(CONFIG_CROP_FILTER) += vf_crop.o
246OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o247OBJS-$(CONFIG_CROPDETECT_FILTER) += vf_cropdetect.o
libavfilter/allfilters.c+1−0
@@ -221,6 +221,7 @@ extern const AVFilter ff_vf_convolution_opencl; · 220 unmodified lines
221extern const AVFilter ff_vf_convolve;221extern const AVFilter ff_vf_convolve;
222extern const AVFilter ff_vf_copy;222extern const AVFilter ff_vf_copy;
223extern const AVFilter ff_vf_coreimage;223extern const AVFilter ff_vf_coreimage;
224extern const AVFilter ff_vf_corr;
224extern const AVFilter ff_vf_cover_rect;225extern const AVFilter ff_vf_cover_rect;
225extern const AVFilter ff_vf_crop;226extern const AVFilter ff_vf_crop;
226extern const AVFilter ff_vf_cropdetect;227extern const AVFilter ff_vf_cropdetect;
libavfilter/version.h+1−1
@@ -31,7 +31,7 @@ · 30 unmodified lines
31 31
32#include "version_major.h"32#include "version_major.h"
33 33
34#define LIBAVFILTER_VERSION_MINOR 5134#define LIBAVFILTER_VERSION_MINOR 52
35#define LIBAVFILTER_VERSION_MICRO 10035#define LIBAVFILTER_VERSION_MICRO 100
36 36
37 37
libavfilter/vf_corr.c+338−0
@@ -0,0 +1,338 @@
1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
20 * @file
21 * Calculate the correlation between two input videos.
22 */
23
24#include "libavutil/avstring.h"
25#include "libavutil/opt.h"
26#include "libavutil/pixdesc.h"
27#include "avfilter.h"
28#include "drawutils.h"
29#include "formats.h"
30#include "framesync.h"
31#include "internal.h"
32#include "video.h"
33
34typedef struct CorrContext {
35 const AVClass *class;
36 FFFrameSync fs;
37 double score, min_score, max_score, score_comp[4];
38 uint64_t nb_frames;
39 int is_rgb;
40 uint8_t rgba_map[4];
41 int max[4];
42 char comps[4];
43 int nb_components;
44 int planewidth[4];
45 int planeheight[4];
46 int (*filter_slice)(AVFilterContext *ctx, void *arg,
47 int jobnr, int nb_jobs);
48} CorrContext;
49
50#define OFFSET(x) offsetof(CorrContext, x)
51#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
52
53static void set_meta(AVFilterContext *ctx,
54 AVDictionary **metadata, const char *key, char comp, float d)
55{
56 char value[128];
57 snprintf(value, sizeof(value), "%f", d);
58 if (comp) {
59 char key2[128];
60 snprintf(key2, sizeof(key2), "lavfi.%s.%s%s%c",
61 ctx->filter->name, ctx->filter->name, key, comp);
62 av_dict_set(metadata, key2, value, 0);
63 } else {
64 char key2[128];
65 snprintf(key2, sizeof(key2), "lavfi.%s.%s%s",
66 ctx->filter->name, ctx->filter->name, key);
67 av_dict_set(metadata, key2, value, 0);
68 }
69}
70
71#define CORR(type, name) \
72static void f##name(AVFilterContext *ctx, AVFrame *master, \
73 AVFrame *ref, double *comp_score) \
74{ \
75 CorrContext *s = ctx->priv; \
76 \
77 for (int c = 0; c < s->nb_components; c++) { \
78 const ptrdiff_t linesize1 = master->linesize[c] / \
79 sizeof(type); \
80 const ptrdiff_t linesize2 = ref->linesize[c] / \
81 sizeof(type); \
82 const type *src1 = (const type *)master->data[c]; \
83 const type *src2 = (const type *)ref->data[c]; \
84 const int h = s->planeheight[c]; \
85 const int w = s->planewidth[c]; \
86 const float scale = 1.f / s->max[c]; \
87 uint64_t sum1 = 0, sum2 = 0; \
88 float sum12, sum1q, sum2q; \
89 float sumq, mean1, mean2; \
90 \
91 for (int y = 0; y < h; y++) { \
92 for (int x = 0; x < w; x++) { \
93 sum1 += src1[x]; \
94 sum2 += src2[x]; \
95 } \
96 \
97 src1 += linesize1; \
98 src2 += linesize2; \
99 } \
100 \
101 mean1 = scale * (sum1 /(double)(w * h)); \
102 mean2 = scale * (sum2 /(double)(w * h)); \
103 \
104 src1 = (const type *)master->data[c]; \
105 src2 = (const type *)ref->data[c]; \
106 \
107 sum12 = 0.f; \
108 sum1q = 0.f; \
109 sum2q = 0.f; \
110 \
111 for (int y = 0; y < h; y++) { \
112 for (int x = 0; x < w; x++) { \
113 const float f1 = scale * src1[x] - mean1; \
114 const float f2 = scale * src2[x] - mean2; \
115 \
116 sum12 += f1 * f2; \
117 sum1q += f1 * f1; \
118 sum2q += f2 * f2; \
119 } \
120 \
121 src1 += linesize1; \
122 src2 += linesize2; \
123 } \
124 \
125 sumq = sqrtf(sum1q * sum2q); \
126 if (sumq > 0.f) { \
127 comp_score[c] = av_clipf(sum12 / sumq,-1.f,1.f); \
128 } else { \
129 comp_score[c] = sum1q == sum2q ? 1.f : 0.f; \
130 } \
131 } \
132}
133
134CORR(uint8_t, corr8)
135CORR(uint16_t, corr16)
136
137static int do_corr(FFFrameSync *fs)
138{
139 AVFilterContext *ctx = fs->parent;
140 CorrContext *s = ctx->priv;
141 AVFrame *master, *ref;
142 double comp_score[4], score = 0.;
143 AVDictionary **metadata;
144 int ret;
145
146 ret = ff_framesync_dualinput_get(fs, &master, &ref);
147 if (ret < 0)
148 return ret;
149 if (ctx->is_disabled || !ref)
150 return ff_filter_frame(ctx->outputs[0], master);
151 metadata = &master->metadata;
152
153 if (s->max[0] > 255) {
154 fcorr16(ctx, master, ref, comp_score);
155 } else {
156 fcorr8(ctx, master, ref, comp_score);
157 }
158
159 for (int c = 0; c < s->nb_components; c++)
160 score += comp_score[c];
161 score /= s->nb_components;
162 s->score += score;
163
164 s->min_score = fmin(s->min_score, score);
165 s->max_score = fmax(s->max_score, score);
166
167 for (int c = 0; c < s->nb_components; c++)
168 s->score_comp[c] += comp_score[c];
169 s->nb_frames++;
170
171 for (int j = 0; j < s->nb_components; j++) {
172 int c = s->is_rgb ? s->rgba_map[j] : j;
173 set_meta(ctx, metadata, ".", s->comps[j], comp_score[c]);
174 }
175 set_meta(ctx, metadata, "_avg", 0, score);
176
177 return ff_filter_frame(ctx->outputs[0], master);
178}
179
180static av_cold int init(AVFilterContext *ctx)
181{
182 CorrContext *s = ctx->priv;
183
184 s->fs.on_event = do_corr;
185
186 return 0;
187}
188
189static const enum AVPixelFormat pix_fmts[] = {
190 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
191#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf
192#define PF_ALPHA(suf) AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf
193#define PF(suf) PF_NOALPHA(suf), PF_ALPHA(suf)
194 PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16),
195 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
196 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
197 AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
198 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
199 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
200 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
201 AV_PIX_FMT_NONE
202};
203
204static int config_input_ref(AVFilterLink *inlink)
205{
206 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
207 AVFilterContext *ctx = inlink->dst;
208 CorrContext *s = ctx->priv;
209
210 s->nb_components = desc->nb_components;
211 if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
212 ctx->inputs[0]->h != ctx->inputs[1]->h) {
213 av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
214 return AVERROR(EINVAL);
215 }
216
217 s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
218 s->comps[0] = s->is_rgb ? 'R' : 'Y' ;
219 s->comps[1] = s->is_rgb ? 'G' : 'U' ;
220 s->comps[2] = s->is_rgb ? 'B' : 'V' ;
221 s->comps[3] = 'A';
222
223 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
224 s->planeheight[0] = s->planeheight[3] = inlink->h;
225 s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
226 s->planewidth[0] = s->planewidth[3] = inlink->w;
227
228 s->min_score = +INFINITY;
229 s->max_score = -INFINITY;
230
231 s->max[0] = (1 << desc->comp[0].depth) - 1;
232 s->max[1] = (1 << desc->comp[1].depth) - 1;
233 s->max[2] = (1 << desc->comp[2].depth) - 1;
234 s->max[3] = (1 << desc->comp[3].depth) - 1;
235
236 return 0;
237}
238
239static int config_output(AVFilterLink *outlink)
240{
241 AVFilterContext *ctx = outlink->src;
242 CorrContext *s = ctx->priv;
243 AVFilterLink *mainlink = ctx->inputs[0];
244 int ret;
245
246 ret = ff_framesync_init_dualinput(&s->fs, ctx);
247 if (ret < 0)
248 return ret;
249 outlink->w = mainlink->w;
250 outlink->h = mainlink->h;
251 outlink->time_base = mainlink->time_base;
252 outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
253 outlink->frame_rate = mainlink->frame_rate;
254 if ((ret = ff_framesync_configure(&s->fs)) < 0)
255 return ret;
256
257 outlink->time_base = s->fs.time_base;
258
259 if (av_cmp_q(mainlink->time_base, outlink->time_base) ||
260 av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base))
261 av_log(ctx, AV_LOG_WARNING, "not matching timebases found between first input: %d/%d and second input %d/%d, results may be incorrect!\n",
262 mainlink->time_base.num, mainlink->time_base.den,
263 ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den);
264
265 return 0;
266}
267
268static int activate(AVFilterContext *ctx)
269{
270 CorrContext *s = ctx->priv;
271 return ff_framesync_activate(&s->fs);
272}
273
274static av_cold void uninit(AVFilterContext *ctx)
275{
276 CorrContext *s = ctx->priv;
277
278 if (s->nb_frames > 0) {
279 char buf[256];
280
281 buf[0] = 0;
282 for (int j = 0; j < s->nb_components; j++) {
283 int c = s->is_rgb ? s->rgba_map[j] : j;
284 av_strlcatf(buf, sizeof(buf), " %c:%f", s->comps[j], s->score_comp[c] / s->nb_frames);
285 }
286
287 av_log(ctx, AV_LOG_INFO, "%s%s average:%f min:%f max:%f\n",
288 ctx->filter->name,
289 buf,
290 s->score / s->nb_frames,
291 s->min_score,
292 s->max_score);
293 }
294
295 ff_framesync_uninit(&s->fs);
296}
297
298static const AVFilterPad corr_inputs[] = {
299 {
300 .name = "main",
301 .type = AVMEDIA_TYPE_VIDEO,
302 },{
303 .name = "reference",
304 .type = AVMEDIA_TYPE_VIDEO,
305 .config_props = config_input_ref,
306 },
307};
308
309static const AVFilterPad corr_outputs[] = {
310 {
311 .name = "default",
312 .type = AVMEDIA_TYPE_VIDEO,
313 .config_props = config_output,
314 },
315};
316
317static const AVOption options[] = {
318 { NULL }
319};
320
321#define corr_options options
322FRAMESYNC_DEFINE_CLASS(corr, CorrContext, fs);
323
324const AVFilter ff_vf_corr = {
325 .name = "corr",
326 .description = NULL_IF_CONFIG_SMALL("Calculate the correlation between two video streams."),
327 .preinit = corr_framesync_preinit,
328 .init = init,
329 .uninit = uninit,
330 .activate = activate,
331 .priv_size = sizeof(CorrContext),
332 .priv_class = &corr_class,
333 FILTER_INPUTS(corr_inputs),
334 FILTER_OUTPUTS(corr_outputs),
335 FILTER_PIXFMTS_ARRAY(pix_fmts),
336 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
337 AVFILTER_FLAG_METADATA_ONLY,
338};

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