FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_framerate.c
Date: 2024-07-17 14:05:47
Exec Total Coverage
Lines: 165 186 88.7%
Functions: 12 12 100.0%
Branches: 80 108 74.1%

Line Branch Exec Source
1 /*
2 * Copyright (C) 2012 Mark Himsley
3 *
4 * get_scene_score() Copyright (c) 2011 Stefano Sabatini
5 * taken from libavfilter/vf_select.c
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * filter for upsampling or downsampling a progressive source
27 */
28
29 #define DEBUG
30
31 #include "libavutil/avassert.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/pixdesc.h"
36
37 #include "avfilter.h"
38 #include "internal.h"
39 #include "video.h"
40 #include "filters.h"
41 #include "framerate.h"
42 #include "scene_sad.h"
43
44 #define OFFSET(x) offsetof(FrameRateContext, x)
45 #define V AV_OPT_FLAG_VIDEO_PARAM
46 #define F AV_OPT_FLAG_FILTERING_PARAM
47 #define FRAMERATE_FLAG_SCD 01
48
49 static const AVOption framerate_options[] = {
50 {"fps", "required output frames per second rate", OFFSET(dest_frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="50"}, 0, INT_MAX, V|F },
51
52 {"interp_start", "point to start linear interpolation", OFFSET(interp_start), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, V|F },
53 {"interp_end", "point to end linear interpolation", OFFSET(interp_end), AV_OPT_TYPE_INT, {.i64=240}, 0, 255, V|F },
54 {"scene", "scene change level", OFFSET(scene_score), AV_OPT_TYPE_DOUBLE, {.dbl=8.2}, 0, 100., V|F },
55
56 {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64=1}, 0, INT_MAX, V|F, .unit = "flags" },
57 {"scene_change_detect", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, .unit = "flags" },
58 {"scd", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, .unit = "flags" },
59
60 {NULL}
61 };
62
63 AVFILTER_DEFINE_CLASS(framerate);
64
65 91 static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
66 {
67 91 FrameRateContext *s = ctx->priv;
68 91 double ret = 0;
69
70 91 ff_dlog(ctx, "get_scene_score()\n");
71
72
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91 if (crnt->height == next->height &&
73
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91 crnt->width == next->width) {
74 uint64_t sad;
75 double mafd, diff;
76
77 91 ff_dlog(ctx, "get_scene_score() process\n");
78 91 s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad);
79 91 mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth);
80 91 diff = fabs(mafd - s->prev_mafd);
81
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91 ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
82 91 s->prev_mafd = mafd;
83 }
84 91 ff_dlog(ctx, "get_scene_score() result is:%f\n", ret);
85 91 return ret;
86 }
87
88 typedef struct ThreadData {
89 AVFrame *copy_src1, *copy_src2;
90 uint16_t src1_factor, src2_factor;
91 } ThreadData;
92
93 873 static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
94 {
95 873 FrameRateContext *s = ctx->priv;
96 873 ThreadData *td = arg;
97 873 AVFrame *work = s->work;
98 873 AVFrame *src1 = td->copy_src1;
99 873 AVFrame *src2 = td->copy_src2;
100 873 uint16_t src1_factor = td->src1_factor;
101 873 uint16_t src2_factor = td->src2_factor;
102 int plane;
103
104
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3492 for (plane = 0; plane < 4 && src1->data[plane] && src2->data[plane]; plane++) {
105 2619 const int start = (s->height[plane] * job ) / nb_jobs;
106 2619 const int end = (s->height[plane] * (job+1)) / nb_jobs;
107 2619 uint8_t *src1_data = src1->data[plane] + start * src1->linesize[plane];
108 2619 uint8_t *src2_data = src2->data[plane] + start * src2->linesize[plane];
109 2619 uint8_t *dst_data = work->data[plane] + start * work->linesize[plane];
110
111 2619 s->blend(src1_data, src1->linesize[plane], src2_data, src2->linesize[plane],
112 2619 dst_data, work->linesize[plane], s->line_size[plane], end - start,
113 2619 src1_factor, src2_factor, s->blend_factor_max >> 1);
114 }
115
116 873 return 0;
117 }
118
119 97 static int blend_frames(AVFilterContext *ctx, int interpolate)
120 {
121 97 FrameRateContext *s = ctx->priv;
122 97 AVFilterLink *outlink = ctx->outputs[0];
123 97 double interpolate_scene_score = 0;
124
125
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97 if ((s->flags & FRAMERATE_FLAG_SCD)) {
126
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97 if (s->score >= 0.0)
127 6 interpolate_scene_score = s->score;
128 else
129 91 interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1);
130 97 ff_dlog(ctx, "blend_frames() interpolate scene score:%f\n", interpolate_scene_score);
131 }
132 // decide if the shot-change detection allows us to blend two frames
133
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97 if (interpolate_scene_score < s->scene_score) {
134 ThreadData td;
135 97 td.copy_src1 = s->f0;
136 97 td.copy_src2 = s->f1;
137 97 td.src2_factor = interpolate;
138 97 td.src1_factor = s->blend_factor_max - td.src2_factor;
139
140 // get work-space for output frame
141 97 s->work = ff_get_video_buffer(outlink, outlink->w, outlink->h);
142
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97 if (!s->work)
143 return AVERROR(ENOMEM);
144
145 97 av_frame_copy_props(s->work, s->f0);
146
147 97 ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
148 97 ff_filter_execute(ctx, filter_slice, &td, NULL,
149
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97 FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx)));
150 97 return 1;
151 }
152 return 0;
153 }
154
155 365 static int process_work_frame(AVFilterContext *ctx)
156 {
157 365 FrameRateContext *s = ctx->priv;
158 int64_t work_pts;
159 int64_t interpolate, interpolate8;
160 int ret;
161
162
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365 if (!s->f1)
163 8 return 0;
164
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357 if (!s->f0 && !s->flush)
165 8 return 0;
166
167 349 work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base);
168
169
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349 if (work_pts >= s->pts1 && !s->flush)
170 224 return 0;
171
172
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125 if (!s->f0) {
173 av_assert1(s->flush);
174 s->work = s->f1;
175 s->f1 = NULL;
176 } else {
177
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125 if (work_pts >= s->pts1 + s->delta && s->flush)
178 2 return 0;
179
180 123 interpolate = av_rescale(work_pts - s->pts0, s->blend_factor_max, s->delta);
181 123 interpolate8 = av_rescale(work_pts - s->pts0, 256, s->delta);
182 123 ff_dlog(ctx, "process_work_frame() interpolate: %"PRId64"/256\n", interpolate8);
183
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123 if (interpolate >= s->blend_factor_max || interpolate8 > s->interp_end) {
184 1 s->work = av_frame_clone(s->f1);
185
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122 } else if (interpolate <= 0 || interpolate8 < s->interp_start) {
186 25 s->work = av_frame_clone(s->f0);
187 } else {
188 97 ret = blend_frames(ctx, interpolate);
189
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97 if (ret < 0)
190 return ret;
191
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97 if (ret == 0)
192 s->work = av_frame_clone(interpolate > (s->blend_factor_max >> 1) ? s->f1 : s->f0);
193 }
194 }
195
196
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123 if (!s->work)
197 return AVERROR(ENOMEM);
198
199 123 s->work->pts = work_pts;
200 123 s->n++;
201
202 123 return 1;
203 }
204
205 8 static av_cold int init(AVFilterContext *ctx)
206 {
207 8 FrameRateContext *s = ctx->priv;
208 8 s->start_pts = AV_NOPTS_VALUE;
209 8 return 0;
210 }
211
212 8 static av_cold void uninit(AVFilterContext *ctx)
213 {
214 8 FrameRateContext *s = ctx->priv;
215 8 av_frame_free(&s->f0);
216 8 av_frame_free(&s->f1);
217 8 }
218
219 static const enum AVPixelFormat pix_fmts[] = {
220 AV_PIX_FMT_YUV410P,
221 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
222 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
223 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
224 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
225 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
226 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12,
227 AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12,
228 AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12,
229 AV_PIX_FMT_NONE
230 };
231
232 #define BLEND_FRAME_FUNC(nbits) \
233 static void blend_frames##nbits##_c(BLEND_FUNC_PARAMS) \
234 { \
235 int line, pixel; \
236 uint##nbits##_t *dstw = (uint##nbits##_t *)dst; \
237 uint##nbits##_t *src1w = (uint##nbits##_t *)src1; \
238 uint##nbits##_t *src2w = (uint##nbits##_t *)src2; \
239 int bytes = nbits / 8; \
240 width /= bytes; \
241 src1_linesize /= bytes; \
242 src2_linesize /= bytes; \
243 dst_linesize /= bytes; \
244 for (line = 0; line < height; line++) { \
245 for (pixel = 0; pixel < width; pixel++) \
246 dstw[pixel] = ((src1w[pixel] * factor1) + \
247 (src2w[pixel] * factor2) + half) \
248 >> BLEND_FACTOR_DEPTH(nbits); \
249 src1w += src1_linesize; \
250 src2w += src2_linesize; \
251 dstw += dst_linesize; \
252 } \
253 }
254
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925656 BLEND_FRAME_FUNC(8)
255
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13736883 BLEND_FRAME_FUNC(16)
256
257 4 void ff_framerate_init(FrameRateContext *s)
258 {
259
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4 if (s->bitdepth == 8) {
260 2 s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(8);
261 2 s->blend = blend_frames8_c;
262 } else {
263 2 s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(16);
264 2 s->blend = blend_frames16_c;
265 }
266 #if ARCH_X86
267 4 ff_framerate_init_x86(s);
268 #endif
269 4 }
270
271 4 static int config_input(AVFilterLink *inlink)
272 {
273 4 AVFilterContext *ctx = inlink->dst;
274 4 FrameRateContext *s = ctx->priv;
275 4 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
276 int plane;
277
278 4 s->vsub = pix_desc->log2_chroma_h;
279
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20 for (plane = 0; plane < 4; plane++) {
280 16 s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w, plane);
281
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16 s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? s->vsub : 0);
282 }
283
284 4 s->bitdepth = pix_desc->comp[0].depth;
285
286
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4 s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16);
287
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4 if (!s->sad)
288 return AVERROR(EINVAL);
289
290 4 s->srce_time_base = inlink->time_base;
291
292 4 ff_framerate_init(s);
293
294 4 return 0;
295 }
296
297 245 static int activate(AVFilterContext *ctx)
298 {
299 int ret, status;
300 245 AVFilterLink *inlink = ctx->inputs[0];
301 245 AVFilterLink *outlink = ctx->outputs[0];
302 245 FrameRateContext *s = ctx->priv;
303 AVFrame *inpicref;
304 int64_t pts;
305
306
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245 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
307
308 365 retry:
309 365 ret = process_work_frame(ctx);
310
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365 if (ret < 0)
311 return ret;
312
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365 else if (ret == 1)
313 123 return ff_filter_frame(outlink, s->work);
314
315 242 ret = ff_inlink_consume_frame(inlink, &inpicref);
316
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242 if (ret < 0)
317 return ret;
318
319
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242 if (inpicref) {
320
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118 if (inpicref->flags & AV_FRAME_FLAG_INTERLACED)
321 av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
322
323
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118 if (inpicref->pts == AV_NOPTS_VALUE) {
324 av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n");
325 av_frame_free(&inpicref);
326 }
327 }
328
329
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242 if (inpicref) {
330 118 pts = av_rescale_q(inpicref->pts, s->srce_time_base, s->dest_time_base);
331
332
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118 if (s->f1 && pts == s->pts1) {
333 av_log(ctx, AV_LOG_WARNING, "Ignoring frame with same PTS.\n");
334 av_frame_free(&inpicref);
335 }
336 }
337
338
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242 if (inpicref) {
339 118 av_frame_free(&s->f0);
340 118 s->f0 = s->f1;
341 118 s->pts0 = s->pts1;
342 118 s->f1 = inpicref;
343 118 s->pts1 = pts;
344 118 s->delta = s->pts1 - s->pts0;
345 118 s->score = -1.0;
346
347
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118 if (s->delta < 0) {
348 av_log(ctx, AV_LOG_WARNING, "PTS discontinuity.\n");
349 s->start_pts = s->pts1;
350 s->n = 0;
351 av_frame_free(&s->f0);
352 }
353
354
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118 if (s->start_pts == AV_NOPTS_VALUE)
355 4 s->start_pts = s->pts1;
356
357 118 goto retry;
358 }
359
360
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124 if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
361
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4 if (!s->flush) {
362 2 s->flush = 1;
363 2 goto retry;
364 }
365 2 ff_outlink_set_status(outlink, status, pts);
366 2 return 0;
367 }
368
369
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120 FF_FILTER_FORWARD_WANTED(outlink, inlink);
370
371 return FFERROR_NOT_READY;
372 }
373
374 4 static int config_output(AVFilterLink *outlink)
375 {
376 4 AVFilterContext *ctx = outlink->src;
377 4 FrameRateContext *s = ctx->priv;
378 int exact;
379
380 4 ff_dlog(ctx, "config_output()\n");
381
382 4 ff_dlog(ctx,
383 "config_output() input time base:%u/%u (%f)\n",
384 ctx->inputs[0]->time_base.num,ctx->inputs[0]->time_base.den,
385 av_q2d(ctx->inputs[0]->time_base));
386
387 // make sure timebase is small enough to hold the framerate
388
389 4 exact = av_reduce(&s->dest_time_base.num, &s->dest_time_base.den,
390 4 av_gcd((int64_t)s->srce_time_base.num * s->dest_frame_rate.num,
391 4 (int64_t)s->srce_time_base.den * s->dest_frame_rate.den ),
392 4 (int64_t)s->srce_time_base.den * s->dest_frame_rate.num, INT_MAX);
393
394 4 av_log(ctx, AV_LOG_INFO,
395 "time base:%u/%u -> %u/%u exact:%d\n",
396 s->srce_time_base.num, s->srce_time_base.den,
397 s->dest_time_base.num, s->dest_time_base.den, exact);
398
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4 if (!exact) {
399 av_log(ctx, AV_LOG_WARNING, "Timebase conversion is not exact\n");
400 }
401
402 4 outlink->frame_rate = s->dest_frame_rate;
403 4 outlink->time_base = s->dest_time_base;
404
405 4 ff_dlog(ctx,
406 "config_output() output time base:%u/%u (%f) w:%d h:%d\n",
407 outlink->time_base.num, outlink->time_base.den,
408 av_q2d(outlink->time_base),
409 outlink->w, outlink->h);
410
411
412 4 av_log(ctx, AV_LOG_INFO, "fps -> fps:%u/%u scene score:%f interpolate start:%d end:%d\n",
413 s->dest_frame_rate.num, s->dest_frame_rate.den,
414 s->scene_score, s->interp_start, s->interp_end);
415
416 4 return 0;
417 }
418
419 static const AVFilterPad framerate_inputs[] = {
420 {
421 .name = "default",
422 .type = AVMEDIA_TYPE_VIDEO,
423 .config_props = config_input,
424 },
425 };
426
427 static const AVFilterPad framerate_outputs[] = {
428 {
429 .name = "default",
430 .type = AVMEDIA_TYPE_VIDEO,
431 .config_props = config_output,
432 },
433 };
434
435 const AVFilter ff_vf_framerate = {
436 .name = "framerate",
437 .description = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."),
438 .priv_size = sizeof(FrameRateContext),
439 .priv_class = &framerate_class,
440 .init = init,
441 .uninit = uninit,
442 FILTER_INPUTS(framerate_inputs),
443 FILTER_OUTPUTS(framerate_outputs),
444 FILTER_PIXFMTS_ARRAY(pix_fmts),
445 .flags = AVFILTER_FLAG_SLICE_THREADS,
446 .activate = activate,
447 };
448