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, "flags" },
57 {"scene_change_detect", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
58 {"scd", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
59
60 {NULL}
61 };
62
63 AVFILTER_DEFINE_CLASS(framerate);
64
get_scene_score(AVFilterContext * ctx,AVFrame * crnt,AVFrame * next)65 static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
66 {
67 FrameRateContext *s = ctx->priv;
68 double ret = 0;
69
70 ff_dlog(ctx, "get_scene_score()\n");
71
72 if (crnt->height == next->height &&
73 crnt->width == next->width) {
74 uint64_t sad;
75 double mafd, diff;
76
77 ff_dlog(ctx, "get_scene_score() process\n");
78 s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad);
79 emms_c();
80 mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth);
81 diff = fabs(mafd - s->prev_mafd);
82 ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
83 s->prev_mafd = mafd;
84 }
85 ff_dlog(ctx, "get_scene_score() result is:%f\n", ret);
86 return ret;
87 }
88
89 typedef struct ThreadData {
90 AVFrame *copy_src1, *copy_src2;
91 uint16_t src1_factor, src2_factor;
92 } ThreadData;
93
filter_slice(AVFilterContext * ctx,void * arg,int job,int nb_jobs)94 static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
95 {
96 FrameRateContext *s = ctx->priv;
97 ThreadData *td = arg;
98 AVFrame *work = s->work;
99 AVFrame *src1 = td->copy_src1;
100 AVFrame *src2 = td->copy_src2;
101 uint16_t src1_factor = td->src1_factor;
102 uint16_t src2_factor = td->src2_factor;
103 int plane;
104
105 for (plane = 0; plane < 4 && src1->data[plane] && src2->data[plane]; plane++) {
106 const int start = (s->height[plane] * job ) / nb_jobs;
107 const int end = (s->height[plane] * (job+1)) / nb_jobs;
108 uint8_t *src1_data = src1->data[plane] + start * src1->linesize[plane];
109 uint8_t *src2_data = src2->data[plane] + start * src2->linesize[plane];
110 uint8_t *dst_data = work->data[plane] + start * work->linesize[plane];
111
112 s->blend(src1_data, src1->linesize[plane], src2_data, src2->linesize[plane],
113 dst_data, work->linesize[plane], s->line_size[plane], end - start,
114 src1_factor, src2_factor, s->blend_factor_max >> 1);
115 }
116
117 return 0;
118 }
119
blend_frames(AVFilterContext * ctx,int interpolate)120 static int blend_frames(AVFilterContext *ctx, int interpolate)
121 {
122 FrameRateContext *s = ctx->priv;
123 AVFilterLink *outlink = ctx->outputs[0];
124 double interpolate_scene_score = 0;
125
126 if ((s->flags & FRAMERATE_FLAG_SCD)) {
127 if (s->score >= 0.0)
128 interpolate_scene_score = s->score;
129 else
130 interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1);
131 ff_dlog(ctx, "blend_frames() interpolate scene score:%f\n", interpolate_scene_score);
132 }
133 // decide if the shot-change detection allows us to blend two frames
134 if (interpolate_scene_score < s->scene_score) {
135 ThreadData td;
136 td.copy_src1 = s->f0;
137 td.copy_src2 = s->f1;
138 td.src2_factor = interpolate;
139 td.src1_factor = s->blend_factor_max - td.src2_factor;
140
141 // get work-space for output frame
142 s->work = ff_get_video_buffer(outlink, outlink->w, outlink->h);
143 if (!s->work)
144 return AVERROR(ENOMEM);
145
146 av_frame_copy_props(s->work, s->f0);
147
148 ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
149 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx)));
150 return 1;
151 }
152 return 0;
153 }
154
process_work_frame(AVFilterContext * ctx)155 static int process_work_frame(AVFilterContext *ctx)
156 {
157 FrameRateContext *s = ctx->priv;
158 int64_t work_pts;
159 int64_t interpolate, interpolate8;
160 int ret;
161
162 if (!s->f1)
163 return 0;
164 if (!s->f0 && !s->flush)
165 return 0;
166
167 work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base);
168
169 if (work_pts >= s->pts1 && !s->flush)
170 return 0;
171
172 if (!s->f0) {
173 s->work = av_frame_clone(s->f1);
174 } else {
175 if (work_pts >= s->pts1 + s->delta && s->flush)
176 return 0;
177
178 interpolate = av_rescale(work_pts - s->pts0, s->blend_factor_max, s->delta);
179 interpolate8 = av_rescale(work_pts - s->pts0, 256, s->delta);
180 ff_dlog(ctx, "process_work_frame() interpolate: %"PRId64"/256\n", interpolate8);
181 if (interpolate >= s->blend_factor_max || interpolate8 > s->interp_end) {
182 s->work = av_frame_clone(s->f1);
183 } else if (interpolate <= 0 || interpolate8 < s->interp_start) {
184 s->work = av_frame_clone(s->f0);
185 } else {
186 ret = blend_frames(ctx, interpolate);
187 if (ret < 0)
188 return ret;
189 if (ret == 0)
190 s->work = av_frame_clone(interpolate > (s->blend_factor_max >> 1) ? s->f1 : s->f0);
191 }
192 }
193
194 if (!s->work)
195 return AVERROR(ENOMEM);
196
197 s->work->pts = work_pts;
198 s->n++;
199
200 return 1;
201 }
202
init(AVFilterContext * ctx)203 static av_cold int init(AVFilterContext *ctx)
204 {
205 FrameRateContext *s = ctx->priv;
206 s->start_pts = AV_NOPTS_VALUE;
207 return 0;
208 }
209
uninit(AVFilterContext * ctx)210 static av_cold void uninit(AVFilterContext *ctx)
211 {
212 FrameRateContext *s = ctx->priv;
213 av_frame_free(&s->f0);
214 av_frame_free(&s->f1);
215 }
216
query_formats(AVFilterContext * ctx)217 static int query_formats(AVFilterContext *ctx)
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 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
233 if (!fmts_list)
234 return AVERROR(ENOMEM);
235 return ff_set_common_formats(ctx, fmts_list);
236 }
237
238 #define BLEND_FRAME_FUNC(nbits) \
239 static void blend_frames##nbits##_c(BLEND_FUNC_PARAMS) \
240 { \
241 int line, pixel; \
242 uint##nbits##_t *dstw = (uint##nbits##_t *)dst; \
243 uint##nbits##_t *src1w = (uint##nbits##_t *)src1; \
244 uint##nbits##_t *src2w = (uint##nbits##_t *)src2; \
245 int bytes = nbits / 8; \
246 width /= bytes; \
247 src1_linesize /= bytes; \
248 src2_linesize /= bytes; \
249 dst_linesize /= bytes; \
250 for (line = 0; line < height; line++) { \
251 for (pixel = 0; pixel < width; pixel++) \
252 dstw[pixel] = ((src1w[pixel] * factor1) + \
253 (src2w[pixel] * factor2) + half) \
254 >> BLEND_FACTOR_DEPTH(nbits); \
255 src1w += src1_linesize; \
256 src2w += src2_linesize; \
257 dstw += dst_linesize; \
258 } \
259 }
260 BLEND_FRAME_FUNC(8)
261 BLEND_FRAME_FUNC(16)
262
ff_framerate_init(FrameRateContext * s)263 void ff_framerate_init(FrameRateContext *s)
264 {
265 if (s->bitdepth == 8) {
266 s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(8);
267 s->blend = blend_frames8_c;
268 } else {
269 s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(16);
270 s->blend = blend_frames16_c;
271 }
272 if (ARCH_X86)
273 ff_framerate_init_x86(s);
274 }
275
config_input(AVFilterLink * inlink)276 static int config_input(AVFilterLink *inlink)
277 {
278 AVFilterContext *ctx = inlink->dst;
279 FrameRateContext *s = ctx->priv;
280 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
281 int plane;
282
283 s->vsub = pix_desc->log2_chroma_h;
284 for (plane = 0; plane < 4; plane++) {
285 s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w, plane);
286 s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? s->vsub : 0);
287 }
288
289 s->bitdepth = pix_desc->comp[0].depth;
290
291 s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16);
292 if (!s->sad)
293 return AVERROR(EINVAL);
294
295 s->srce_time_base = inlink->time_base;
296
297 ff_framerate_init(s);
298
299 return 0;
300 }
301
activate(AVFilterContext * ctx)302 static int activate(AVFilterContext *ctx)
303 {
304 int ret, status;
305 AVFilterLink *inlink = ctx->inputs[0];
306 AVFilterLink *outlink = ctx->outputs[0];
307 FrameRateContext *s = ctx->priv;
308 AVFrame *inpicref;
309 int64_t pts;
310
311 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
312
313 retry:
314 ret = process_work_frame(ctx);
315 if (ret < 0)
316 return ret;
317 else if (ret == 1)
318 return ff_filter_frame(outlink, s->work);
319
320 ret = ff_inlink_consume_frame(inlink, &inpicref);
321 if (ret < 0)
322 return ret;
323
324 if (inpicref) {
325 if (inpicref->interlaced_frame)
326 av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
327
328 if (inpicref->pts == AV_NOPTS_VALUE) {
329 av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n");
330 av_frame_free(&inpicref);
331 }
332 }
333
334 if (inpicref) {
335 pts = av_rescale_q(inpicref->pts, s->srce_time_base, s->dest_time_base);
336
337 if (s->f1 && pts == s->pts1) {
338 av_log(ctx, AV_LOG_WARNING, "Ignoring frame with same PTS.\n");
339 av_frame_free(&inpicref);
340 }
341 }
342
343 if (inpicref) {
344 av_frame_free(&s->f0);
345 s->f0 = s->f1;
346 s->pts0 = s->pts1;
347 s->f1 = inpicref;
348 s->pts1 = pts;
349 s->delta = s->pts1 - s->pts0;
350 s->score = -1.0;
351
352 if (s->delta < 0) {
353 av_log(ctx, AV_LOG_WARNING, "PTS discontinuity.\n");
354 s->start_pts = s->pts1;
355 s->n = 0;
356 av_frame_free(&s->f0);
357 }
358
359 if (s->start_pts == AV_NOPTS_VALUE)
360 s->start_pts = s->pts1;
361
362 goto retry;
363 }
364
365 if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
366 if (!s->flush) {
367 s->flush = 1;
368 goto retry;
369 }
370 ff_outlink_set_status(outlink, status, pts);
371 return 0;
372 }
373
374 FF_FILTER_FORWARD_WANTED(outlink, inlink);
375
376 return FFERROR_NOT_READY;
377 }
378
config_output(AVFilterLink * outlink)379 static int config_output(AVFilterLink *outlink)
380 {
381 AVFilterContext *ctx = outlink->src;
382 FrameRateContext *s = ctx->priv;
383 int exact;
384
385 ff_dlog(ctx, "config_output()\n");
386
387 ff_dlog(ctx,
388 "config_output() input time base:%u/%u (%f)\n",
389 ctx->inputs[0]->time_base.num,ctx->inputs[0]->time_base.den,
390 av_q2d(ctx->inputs[0]->time_base));
391
392 // make sure timebase is small enough to hold the framerate
393
394 exact = av_reduce(&s->dest_time_base.num, &s->dest_time_base.den,
395 av_gcd((int64_t)s->srce_time_base.num * s->dest_frame_rate.num,
396 (int64_t)s->srce_time_base.den * s->dest_frame_rate.den ),
397 (int64_t)s->srce_time_base.den * s->dest_frame_rate.num, INT_MAX);
398
399 av_log(ctx, AV_LOG_INFO,
400 "time base:%u/%u -> %u/%u exact:%d\n",
401 s->srce_time_base.num, s->srce_time_base.den,
402 s->dest_time_base.num, s->dest_time_base.den, exact);
403 if (!exact) {
404 av_log(ctx, AV_LOG_WARNING, "Timebase conversion is not exact\n");
405 }
406
407 outlink->frame_rate = s->dest_frame_rate;
408 outlink->time_base = s->dest_time_base;
409
410 ff_dlog(ctx,
411 "config_output() output time base:%u/%u (%f) w:%d h:%d\n",
412 outlink->time_base.num, outlink->time_base.den,
413 av_q2d(outlink->time_base),
414 outlink->w, outlink->h);
415
416
417 av_log(ctx, AV_LOG_INFO, "fps -> fps:%u/%u scene score:%f interpolate start:%d end:%d\n",
418 s->dest_frame_rate.num, s->dest_frame_rate.den,
419 s->scene_score, s->interp_start, s->interp_end);
420
421 return 0;
422 }
423
424 static const AVFilterPad framerate_inputs[] = {
425 {
426 .name = "default",
427 .type = AVMEDIA_TYPE_VIDEO,
428 .config_props = config_input,
429 },
430 { NULL }
431 };
432
433 static const AVFilterPad framerate_outputs[] = {
434 {
435 .name = "default",
436 .type = AVMEDIA_TYPE_VIDEO,
437 .config_props = config_output,
438 },
439 { NULL }
440 };
441
442 AVFilter ff_vf_framerate = {
443 .name = "framerate",
444 .description = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."),
445 .priv_size = sizeof(FrameRateContext),
446 .priv_class = &framerate_class,
447 .init = init,
448 .uninit = uninit,
449 .query_formats = query_formats,
450 .inputs = framerate_inputs,
451 .outputs = framerate_outputs,
452 .flags = AVFILTER_FLAG_SLICE_THREADS,
453 .activate = activate,
454 };
455