aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/vf_identity.c
blob: d3a5ec14f6deb90efe92e7729f936bcff5d16159 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
/*
 * Copyright (c) 2021 Paul B Mahol
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * Calculate the Identity between two input videos.
 */

#include "config_components.h"

#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "framesync.h"
#include "internal.h"
#include "scene_sad.h"

typedef struct IdentityContext {
    const AVClass *class;
    FFFrameSync fs;
    double score, min_score, max_score, score_comp[4];
    uint64_t nb_frames;
    int is_rgb;
    int is_msad;
    uint8_t rgba_map[4];
    int max[4];
    char comps[4];
    int nb_components;
    int nb_threads;
    int planewidth[4];
    int planeheight[4];
    uint64_t **scores;
    unsigned (*filter_line)(const uint8_t *buf, const uint8_t *ref, int w);
    int (*filter_slice)(AVFilterContext *ctx, void *arg,
                        int jobnr, int nb_jobs);
    ff_scene_sad_fn sad;
} IdentityContext;

#define OFFSET(x) offsetof(IdentityContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static unsigned identity_line_8bit(const uint8_t *main_line,  const uint8_t *ref_line, int outw)
{
    unsigned score = 0;

    for (int j = 0; j < outw; j++)
        score += main_line[j] == ref_line[j];

    return score;
}

static unsigned identity_line_16bit(const uint8_t *mmain_line, const uint8_t *rref_line, int outw)
{
    const uint16_t *main_line = (const uint16_t *)mmain_line;
    const uint16_t *ref_line = (const uint16_t *)rref_line;
    unsigned score = 0;

    for (int j = 0; j < outw; j++)
        score += main_line[j] == ref_line[j];

    return score;
}

typedef struct ThreadData {
    const uint8_t *main_data[4];
    const uint8_t *ref_data[4];
    int main_linesize[4];
    int ref_linesize[4];
    int planewidth[4];
    int planeheight[4];
    uint64_t **score;
    int nb_components;
} ThreadData;

static
int compute_images_msad(AVFilterContext *ctx, void *arg,
                        int jobnr, int nb_jobs)
{
    IdentityContext *s = ctx->priv;
    ThreadData *td = arg;
    uint64_t *score = td->score[jobnr];

    for (int c = 0; c < td->nb_components; c++) {
        const int outw = td->planewidth[c];
        const int outh = td->planeheight[c];
        const int slice_start = (outh * jobnr) / nb_jobs;
        const int slice_end = (outh * (jobnr+1)) / nb_jobs;
        const int ref_linesize = td->ref_linesize[c];
        const int main_linesize = td->main_linesize[c];
        const uint8_t *main_line = td->main_data[c] + main_linesize * slice_start;
        const uint8_t *ref_line = td->ref_data[c] + ref_linesize * slice_start;
        uint64_t m = 0;

        s->sad(main_line, main_linesize, ref_line, ref_linesize,
               outw, slice_end - slice_start, &m);

        score[c] = m;
    }

    return 0;
}

static
int compute_images_identity(AVFilterContext *ctx, void *arg,
                            int jobnr, int nb_jobs)
{
    IdentityContext *s = ctx->priv;
    ThreadData *td = arg;
    uint64_t *score = td->score[jobnr];

    for (int c = 0; c < td->nb_components; c++) {
        const int outw = td->planewidth[c];
        const int outh = td->planeheight[c];
        const int slice_start = (outh * jobnr) / nb_jobs;
        const int slice_end = (outh * (jobnr+1)) / nb_jobs;
        const int ref_linesize = td->ref_linesize[c];
        const int main_linesize = td->main_linesize[c];
        const uint8_t *main_line = td->main_data[c] + main_linesize * slice_start;
        const uint8_t *ref_line = td->ref_data[c] + ref_linesize * slice_start;
        uint64_t m = 0;

        for (int i = slice_start; i < slice_end; i++) {
            m += s->filter_line(main_line, ref_line, outw);
            ref_line += ref_linesize;
            main_line += main_linesize;
        }
        score[c] = m;
    }

    return 0;
}

static void set_meta(AVFilterContext *ctx,
                     AVDictionary **metadata, const char *key, char comp, float d)
{
    char value[128];
    snprintf(value, sizeof(value), "%f", d);
    if (comp) {
        char key2[128];
        snprintf(key2, sizeof(key2), "lavfi.%s.%s%s%c",
                 ctx->filter->name, ctx->filter->name, key, comp);
        av_dict_set(metadata, key2, value, 0);
    } else {
        char key2[128];
        snprintf(key2, sizeof(key2), "lavfi.%s.%s%s",
                 ctx->filter->name, ctx->filter->name, key);
        av_dict_set(metadata, key2, value, 0);
    }
}

static int do_identity(FFFrameSync *fs)
{
    AVFilterContext *ctx = fs->parent;
    IdentityContext *s = ctx->priv;
    AVFrame *master, *ref;
    double comp_score[4], score = 0.;
    uint64_t comp_sum[4] = { 0 };
    AVDictionary **metadata;
    ThreadData td;
    int ret;

    ret = ff_framesync_dualinput_get(fs, &master, &ref);
    if (ret < 0)
        return ret;
    if (ctx->is_disabled || !ref)
        return ff_filter_frame(ctx->outputs[0], master);
    metadata = &master->metadata;

    td.nb_components = s->nb_components;
    td.score = s->scores;
    for (int c = 0; c < s->nb_components; c++) {
        td.main_data[c] = master->data[c];
        td.ref_data[c] = ref->data[c];
        td.main_linesize[c] = master->linesize[c];
        td.ref_linesize[c] = ref->linesize[c];
        td.planewidth[c] = s->planewidth[c];
        td.planeheight[c] = s->planeheight[c];
    }

    ff_filter_execute(ctx, s->filter_slice, &td, NULL,
                      FFMIN(s->planeheight[1], s->nb_threads));

    for (int j = 0; j < s->nb_threads; j++) {
        for (int c = 0; c < s->nb_components; c++)
            comp_sum[c] += s->scores[j][c];
    }

    for (int c = 0; c < s->nb_components; c++)
        comp_score[c] = comp_sum[c] / ((double)s->planewidth[c] * s->planeheight[c]);

    for (int c = 0; c < s->nb_components && s->is_msad; c++)
        comp_score[c] /= (double)s->max[c];

    for (int c = 0; c < s->nb_components; c++)
        score += comp_score[c];
    score /= s->nb_components;

    s->min_score = FFMIN(s->min_score, score);
    s->max_score = FFMAX(s->max_score, score);

    s->score += score;

    for (int j = 0; j < s->nb_components; j++)
        s->score_comp[j] += comp_score[j];
    s->nb_frames++;

    for (int j = 0; j < s->nb_components; j++) {
        int c = s->is_rgb ? s->rgba_map[j] : j;
        set_meta(ctx, metadata, ".", s->comps[j], comp_score[c]);
    }
    set_meta(ctx, metadata, "_avg", 0, score);

    return ff_filter_frame(ctx->outputs[0], master);
}

static av_cold int init(AVFilterContext *ctx)
{
    IdentityContext *s = ctx->priv;

    s->fs.on_event = do_identity;

    return 0;
}

static const enum AVPixelFormat pix_fmts[] = {
    AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf,  AV_PIX_FMT_YUV422##suf,  AV_PIX_FMT_YUV444##suf
#define PF_ALPHA(suf)   AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf
#define PF(suf)         PF_NOALPHA(suf), PF_ALPHA(suf)
    PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16),
    AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
    AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
    AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
    AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
    AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
    AV_PIX_FMT_NONE
};

static int config_input_ref(AVFilterLink *inlink)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
    AVFilterContext *ctx  = inlink->dst;
    IdentityContext *s = ctx->priv;

    s->nb_threads = ff_filter_get_nb_threads(ctx);
    s->nb_components = desc->nb_components;
    if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
        ctx->inputs[0]->h != ctx->inputs[1]->h) {
        av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
        return AVERROR(EINVAL);
    }

    s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
    s->comps[0] = s->is_rgb ? 'R' : 'Y' ;
    s->comps[1] = s->is_rgb ? 'G' : 'U' ;
    s->comps[2] = s->is_rgb ? 'B' : 'V' ;
    s->comps[3] = 'A';

    s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
    s->planeheight[0] = s->planeheight[3] = inlink->h;
    s->planewidth[1]  = s->planewidth[2]  = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
    s->planewidth[0]  = s->planewidth[3]  = inlink->w;

    s->scores = av_calloc(s->nb_threads, sizeof(*s->scores));
    if (!s->scores)
        return AVERROR(ENOMEM);

    for (int t = 0; t < s->nb_threads; t++) {
        s->scores[t] = av_calloc(s->nb_components, sizeof(*s->scores[0]));
        if (!s->scores[t])
            return AVERROR(ENOMEM);
    }

    s->min_score = +INFINITY;
    s->max_score = -INFINITY;

    s->max[0] = (1 << desc->comp[0].depth) - 1;
    s->max[1] = (1 << desc->comp[1].depth) - 1;
    s->max[2] = (1 << desc->comp[2].depth) - 1;
    s->max[3] = (1 << desc->comp[3].depth) - 1;

    s->is_msad = !strcmp(ctx->filter->name, "msad");
    s->filter_slice = !s->is_msad ? compute_images_identity : compute_images_msad;
    s->filter_line = desc->comp[0].depth > 8 ? identity_line_16bit : identity_line_8bit;

    s->sad = ff_scene_sad_get_fn(desc->comp[0].depth <= 8 ? 8 : 16);
    if (!s->sad)
        return AVERROR(EINVAL);

    return 0;
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    IdentityContext *s = ctx->priv;
    AVFilterLink *mainlink = ctx->inputs[0];
    int ret;

    ret = ff_framesync_init_dualinput(&s->fs, ctx);
    if (ret < 0)
        return ret;
    outlink->w = mainlink->w;
    outlink->h = mainlink->h;
    outlink->time_base = mainlink->time_base;
    outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio;
    outlink->frame_rate = mainlink->frame_rate;
    if ((ret = ff_framesync_configure(&s->fs)) < 0)
        return ret;

    outlink->time_base = s->fs.time_base;

    if (av_cmp_q(mainlink->time_base, outlink->time_base) ||
        av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base))
        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",
               mainlink->time_base.num, mainlink->time_base.den,
               ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den);

    return 0;
}

static int activate(AVFilterContext *ctx)
{
    IdentityContext *s = ctx->priv;
    return ff_framesync_activate(&s->fs);
}

static av_cold void uninit(AVFilterContext *ctx)
{
    IdentityContext *s = ctx->priv;

    if (s->nb_frames > 0) {
        char buf[256];

        buf[0] = 0;
        for (int j = 0; j < s->nb_components; j++) {
            int c = s->is_rgb ? s->rgba_map[j] : j;
            av_strlcatf(buf, sizeof(buf), " %c:%f", s->comps[j], s->score_comp[c] / s->nb_frames);
        }

        av_log(ctx, AV_LOG_INFO, "%s%s average:%f min:%f max:%f\n",
               ctx->filter->name,
               buf,
               s->score / s->nb_frames,
               s->min_score,
               s->max_score);
    }

    ff_framesync_uninit(&s->fs);
    for (int t = 0; t < s->nb_threads && s->scores; t++)
        av_freep(&s->scores[t]);
    av_freep(&s->scores);
}

static const AVFilterPad identity_inputs[] = {
    {
        .name         = "main",
        .type         = AVMEDIA_TYPE_VIDEO,
    },{
        .name         = "reference",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_input_ref,
    },
};

static const AVFilterPad identity_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output,
    },
};

static const AVOption options[] = {
    { NULL }
};

#if CONFIG_IDENTITY_FILTER

#define identity_options options
FRAMESYNC_DEFINE_CLASS(identity, IdentityContext, fs);

const AVFilter ff_vf_identity = {
    .name          = "identity",
    .description   = NULL_IF_CONFIG_SMALL("Calculate the Identity between two video streams."),
    .preinit       = identity_framesync_preinit,
    .init          = init,
    .uninit        = uninit,
    .activate      = activate,
    .priv_size     = sizeof(IdentityContext),
    .priv_class    = &identity_class,
    FILTER_INPUTS(identity_inputs),
    FILTER_OUTPUTS(identity_outputs),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                     AVFILTER_FLAG_SLICE_THREADS             |
                     AVFILTER_FLAG_METADATA_ONLY,
};

#endif /* CONFIG_IDENTITY_FILTER */

#if CONFIG_MSAD_FILTER

#define msad_options options
FRAMESYNC_DEFINE_CLASS(msad, IdentityContext, fs);

const AVFilter ff_vf_msad = {
    .name          = "msad",
    .description   = NULL_IF_CONFIG_SMALL("Calculate the MSAD between two video streams."),
    .preinit       = msad_framesync_preinit,
    .init          = init,
    .uninit        = uninit,
    .activate      = activate,
    .priv_size     = sizeof(IdentityContext),
    .priv_class    = &msad_class,
    FILTER_INPUTS(identity_inputs),
    FILTER_OUTPUTS(identity_outputs),
    FILTER_PIXFMTS_ARRAY(pix_fmts),
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
                     AVFILTER_FLAG_SLICE_THREADS             |
                     AVFILTER_FLAG_METADATA_ONLY,
};

#endif /* CONFIG_MSAD_FILTER */