FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/vf_fade.c
Date: 2025-10-10 03:51:19
Exec Total Coverage
Lines: 98 220 44.5%
Functions: 6 13 46.2%
Branches: 59 164 36.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2010 Brandon Mintern
3 * Copyright (c) 2007 Bobby Bingham
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * video fade filter
25 * based heavily on vf_negate.c by Bobby Bingham
26 */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/common.h"
31 #include "libavutil/eval.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "avfilter.h"
35 #include "drawutils.h"
36 #include "filters.h"
37 #include "formats.h"
38 #include "video.h"
39
40 #define R 0
41 #define G 1
42 #define B 2
43 #define A 3
44
45 #define Y 0
46 #define U 1
47 #define V 2
48
49 #define FADE_IN 0
50 #define FADE_OUT 1
51
52 typedef struct FadeContext {
53 const AVClass *class;
54 int type;
55 int factor, fade_per_frame;
56 int start_frame, nb_frames;
57 int hsub, vsub, bpp, depth;
58 unsigned int black_level, black_level_scaled;
59 uint8_t is_rgb;
60 uint8_t is_packed_rgb;
61 uint8_t rgba_map[4];
62 int alpha;
63 int is_planar;
64 uint64_t start_time, duration;
65 uint64_t start_time_pts, duration_pts;
66 enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
67 uint8_t color_rgba[4]; ///< fade color
68 int black_fade; ///< if color_rgba is black
69 int (*filter_slice_luma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
70 int (*filter_slice_chroma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
71 int (*filter_slice_alpha)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
72 } FadeContext;
73
74 4 static av_cold int init(AVFilterContext *ctx)
75 {
76 4 FadeContext *s = ctx->priv;
77
78 4 s->fade_per_frame = (1 << 16) / s->nb_frames;
79 4 s->fade_state = VF_FADE_WAITING;
80
81
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4 if (s->duration != 0) {
82 // If duration (seconds) is non-zero, assume that we are not fading based on frames
83 s->nb_frames = 0; // Mostly to clean up logging
84 }
85
86 // Choose what to log. If both time-based and frame-based options, both lines will be in the log
87
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4 if (s->start_frame || s->nb_frames) {
88 4 av_log(ctx, AV_LOG_VERBOSE,
89 "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
90
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4 s->type == FADE_IN ? "in" : "out", s->start_frame,
91 s->nb_frames,s->alpha);
92 }
93
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4 if (s->start_time || s->duration) {
94 av_log(ctx, AV_LOG_VERBOSE,
95 "type:%s start_time:%f duration:%f alpha:%d\n",
96 s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
97 (s->duration / (double)AV_TIME_BASE),s->alpha);
98 }
99
100 4 s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
101 4 return 0;
102 }
103
104 2 static int query_formats(const AVFilterContext *ctx,
105 AVFilterFormatsConfig **cfg_in,
106 AVFilterFormatsConfig **cfg_out)
107 {
108 2 const FadeContext *s = ctx->priv;
109 static const enum AVPixelFormat pix_fmts[] = {
110 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
111 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
112 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
113 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
114 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
115 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
116 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
117 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
118 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
119 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
120 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
121 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
122 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
123 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
124 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
125 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
126 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
127 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
128 AV_PIX_FMT_NONE
129 };
130 static const enum AVPixelFormat pix_fmts_rgb[] = {
131 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
132 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
133 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
134 AV_PIX_FMT_GBRP,
135 AV_PIX_FMT_NONE
136 };
137 static const enum AVPixelFormat pix_fmts_alpha[] = {
138 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
139 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
140 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
141 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
142 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
143 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
144 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
145 AV_PIX_FMT_GBRAP,
146 AV_PIX_FMT_NONE
147 };
148 static const enum AVPixelFormat pix_fmts_rgba[] = {
149 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
150 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
151 AV_PIX_FMT_GBRAP,
152 AV_PIX_FMT_NONE
153 };
154 const static int straight_alpha[] = {
155 AVALPHA_MODE_UNSPECIFIED,
156 AVALPHA_MODE_STRAIGHT,
157 -1,
158 };
159 const enum AVPixelFormat *pixel_fmts;
160 2 int need_straight = 0;
161 int ret;
162
163
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2 if (s->alpha) {
164 if (s->black_fade)
165 pixel_fmts = pix_fmts_alpha;
166 else
167 pixel_fmts = pix_fmts_rgba;
168 need_straight = 1;
169 } else {
170
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2 if (s->black_fade)
171 2 pixel_fmts = pix_fmts;
172 else {
173 pixel_fmts = pix_fmts_rgb;
174 need_straight = 1;
175 }
176 }
177
178
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2 if (need_straight) {
179 ret = ff_set_common_alpha_modes_from_list2(ctx, cfg_in, cfg_out, straight_alpha);
180 if (ret < 0)
181 return ret;
182 }
183
184 2 return ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, pixel_fmts);
185 }
186
187 const static enum AVPixelFormat studio_level_pix_fmts[] = {
188 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
189 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
190 AV_PIX_FMT_YUV440P,
191 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
192 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
193 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
194 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
195 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
196 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
197 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
198 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
199 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
200 AV_PIX_FMT_NONE
201 };
202
203 static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame,
204 int slice_start, int slice_end,
205 int do_alpha, int step)
206 {
207 int i, j;
208 const uint8_t r_idx = s->rgba_map[R];
209 const uint8_t g_idx = s->rgba_map[G];
210 const uint8_t b_idx = s->rgba_map[B];
211 const uint8_t a_idx = s->rgba_map[A];
212 const uint8_t *c = s->color_rgba;
213
214 for (i = slice_start; i < slice_end; i++) {
215 uint8_t *p = frame->data[0] + i * frame->linesize[0];
216 for (j = 0; j < frame->width; j++) {
217 #define INTERP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
218 p[r_idx] = INTERP(r_idx, 0);
219 p[g_idx] = INTERP(g_idx, 1);
220 p[b_idx] = INTERP(b_idx, 2);
221 if (do_alpha)
222 p[a_idx] = INTERP(a_idx, 3);
223 p += step;
224 }
225 }
226 }
227
228 static av_always_inline void filter_rgb_planar(FadeContext *s, const AVFrame *frame,
229 int slice_start, int slice_end,
230 int do_alpha)
231 {
232 int i, j;
233 const uint8_t *c = s->color_rgba;
234
235 for (i = slice_start; i < slice_end; i++) {
236 uint8_t *pg = frame->data[0] + i * frame->linesize[0];
237 uint8_t *pb = frame->data[1] + i * frame->linesize[1];
238 uint8_t *pr = frame->data[2] + i * frame->linesize[2];
239 uint8_t *pa = frame->data[3] + i * frame->linesize[3];
240 for (j = 0; j < frame->width; j++) {
241 #define INTERPP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)c_name - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
242 pr[j] = INTERPP(pr[j], 0);
243 pg[j] = INTERPP(pg[j], 1);
244 pb[j] = INTERPP(pb[j], 2);
245 if (do_alpha)
246 pa[j] = INTERPP(pa[j], 3);
247 }
248 }
249 }
250
251 static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
252 int nb_jobs)
253 {
254 FadeContext *s = ctx->priv;
255 AVFrame *frame = arg;
256 int slice_start = (frame->height * jobnr ) / nb_jobs;
257 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
258
259 if (s->is_planar && s->alpha)
260 filter_rgb_planar(s, frame, slice_start, slice_end, 1);
261 else if (s->is_planar)
262 filter_rgb_planar(s, frame, slice_start, slice_end, 0);
263 else if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
264 else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
265 else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
266 else av_assert0(0);
267
268 return 0;
269 }
270
271 351 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
272 int nb_jobs)
273 {
274 351 FadeContext *s = ctx->priv;
275 351 AVFrame *frame = arg;
276 351 int slice_start = (frame->height * jobnr ) / nb_jobs;
277 351 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
278 int i, j;
279
280
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702 for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
281
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11583 for (i = slice_start; i < slice_end; i++) {
282 11232 uint8_t *p = frame->data[k] + i * frame->linesize[k];
283
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3964896 for (j = 0; j < frame->width * s->bpp; j++) {
284 /* s->factor is using 16 lower-order bits for decimal
285 * places. 32768 = 1 << 15, it is an integer representation
286 * of 0.5 and is for rounding. */
287 3953664 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
288 3953664 p++;
289 }
290 }
291 }
292
293 351 return 0;
294 }
295
296 static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr,
297 int nb_jobs)
298 {
299 FadeContext *s = ctx->priv;
300 AVFrame *frame = arg;
301 int slice_start = (frame->height * jobnr ) / nb_jobs;
302 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
303 int i, j;
304
305 for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
306 for (i = slice_start; i < slice_end; i++) {
307 uint16_t *p = (uint16_t *)(frame->data[k] + i * frame->linesize[k]);
308 for (j = 0; j < frame->width * s->bpp; j++) {
309 /* s->factor is using 16 lower-order bits for decimal
310 * places. 32768 = 1 << 15, it is an integer representation
311 * of 0.5 and is for rounding. */
312 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
313 p++;
314 }
315 }
316 }
317
318 return 0;
319 }
320
321 351 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
322 int nb_jobs)
323 {
324 351 FadeContext *s = ctx->priv;
325 351 AVFrame *frame = arg;
326 int i, j, plane;
327 351 const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
328 351 const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
329 351 int slice_start = (height * jobnr ) / nb_jobs;
330 351 int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
331
332
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1053 for (plane = 1; plane < 3; plane++) {
333
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11934 for (i = slice_start; i < slice_end; i++) {
334 11232 uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
335
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1988064 for (j = 0; j < width; j++) {
336 /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
337 * representation of 128.5. The .5 is for rounding
338 * purposes. */
339 1976832 *p = ((*p - 128) * s->factor + 8421367) >> 16;
340 1976832 p++;
341 }
342 }
343 }
344
345 351 return 0;
346 }
347
348 static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr,
349 int nb_jobs)
350 {
351 FadeContext *s = ctx->priv;
352 AVFrame *frame = arg;
353 int i, j, plane;
354 const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
355 const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
356 const int mid = 1 << (s->depth - 1);
357 const int add = ((mid << 1) + 1) << 15;
358 int slice_start = (height * jobnr ) / nb_jobs;
359 int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
360
361 for (plane = 1; plane < 3; plane++) {
362 for (i = slice_start; i < slice_end; i++) {
363 uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]);
364 for (j = 0; j < width; j++) {
365 *p = ((*p - mid) * s->factor + add) >> 16;
366 p++;
367 }
368 }
369 }
370
371 return 0;
372 }
373
374 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
375 int nb_jobs)
376 {
377 FadeContext *s = ctx->priv;
378 AVFrame *frame = arg;
379 int plane = s->is_packed_rgb ? 0 : A;
380 int slice_start = (frame->height * jobnr ) / nb_jobs;
381 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
382 int i, j;
383
384 for (i = slice_start; i < slice_end; i++) {
385 uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
386 int step = s->is_packed_rgb ? 4 : 1;
387 for (j = 0; j < frame->width; j++) {
388 /* s->factor is using 16 lower-order bits for decimal
389 * places. 32768 = 1 << 15, it is an integer representation
390 * of 0.5 and is for rounding. */
391 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
392 p += step;
393 }
394 }
395
396 return 0;
397 }
398
399 static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr,
400 int nb_jobs)
401 {
402 FadeContext *s = ctx->priv;
403 AVFrame *frame = arg;
404 int plane = s->is_packed_rgb ? 0 : A;
405 int slice_start = (frame->height * jobnr ) / nb_jobs;
406 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
407 int i, j;
408
409 for (i = slice_start; i < slice_end; i++) {
410 uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]) + s->is_packed_rgb*s->rgba_map[A];
411 int step = s->is_packed_rgb ? 4 : 1;
412 for (j = 0; j < frame->width; j++) {
413 /* s->factor is using 16 lower-order bits for decimal
414 * places. 32768 = 1 << 15, it is an integer representation
415 * of 0.5 and is for rounding. */
416 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
417 p += step;
418 }
419 }
420
421 return 0;
422 }
423
424 2 static int config_input(AVFilterLink *inlink)
425 {
426 2 FadeContext *s = inlink->dst->priv;
427 2 const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
428
429 2 s->hsub = pixdesc->log2_chroma_w;
430 2 s->vsub = pixdesc->log2_chroma_h;
431
432 2 ff_fill_rgba_map(s->rgba_map, inlink->format);
433
434 2 s->depth = pixdesc->comp[0].depth;
435 4 s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
436
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2 1 :
437 av_get_bits_per_pixel(pixdesc) >> 3;
438 2 s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
439 2 s->is_planar = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR;
440 2 s->is_rgb = pixdesc->flags & AV_PIX_FMT_FLAG_RGB;
441
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2 s->is_packed_rgb = !s->is_planar && s->is_rgb;
442
443
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2 if (s->duration)
444 s->duration_pts = av_rescale_q(s->duration, AV_TIME_BASE_Q, inlink->time_base);
445
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2 if (s->start_time)
446 s->start_time_pts = av_rescale_q(s->start_time, AV_TIME_BASE_Q, inlink->time_base);
447
448 /* use CCIR601/709 black level for studio-level pixel non-alpha components */
449 2 s->black_level =
450
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2 ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 * (1 << (s->depth - 8)): 0;
451 /* 32768 = 1 << 15, it is an integer representation
452 * of 0.5 and is for rounding. */
453 2 s->black_level_scaled = (s->black_level << 16) + 32768;
454
455
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2 s->filter_slice_luma = s->depth <= 8 ? filter_slice_luma : filter_slice_luma16;
456
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2 s->filter_slice_chroma = s->depth <= 8 ? filter_slice_chroma : filter_slice_chroma16;
457
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2 s->filter_slice_alpha = s->depth <= 8 ? filter_slice_alpha : filter_slice_alpha16;
458
459 2 return 0;
460 }
461
462 100 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
463 {
464 100 FilterLink *inl = ff_filter_link(inlink);
465 100 AVFilterContext *ctx = inlink->dst;
466 100 FadeContext *s = ctx->priv;
467
468 // Calculate Fade assuming this is a Fade In
469
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100 if (s->fade_state == VF_FADE_WAITING) {
470 37 s->factor=0;
471
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37 if (frame->pts >= s->start_time_pts
472
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37 && inl->frame_count_out >= s->start_frame) {
473 // Time to start fading
474 2 s->fade_state = VF_FADE_FADING;
475
476 // Save start time in case we are starting based on frames and fading based on time
477
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2 if (s->start_time_pts == 0 && s->start_frame != 0) {
478 2 s->start_time_pts = frame->pts;
479 }
480
481 // Save start frame in case we are starting based on time and fading based on frames
482
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2 if (s->start_time_pts != 0 && s->start_frame == 0) {
483 s->start_frame = inl->frame_count_out;
484 }
485 }
486 }
487
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100 if (s->fade_state == VF_FADE_FADING) {
488
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34 if (s->duration_pts == 0) {
489 // Fading based on frame count
490 34 s->factor = (inl->frame_count_out - s->start_frame) * s->fade_per_frame;
491
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34 if (inl->frame_count_out > s->start_frame + s->nb_frames) {
492 2 s->fade_state = VF_FADE_DONE;
493 }
494
495 } else {
496 // Fading based on duration
497 s->factor = (frame->pts - s->start_time_pts) * UINT16_MAX / s->duration_pts;
498 if (frame->pts > s->start_time_pts + s->duration_pts) {
499 s->fade_state = VF_FADE_DONE;
500 }
501 }
502 }
503
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100 if (s->fade_state == VF_FADE_DONE) {
504 33 s->factor=UINT16_MAX;
505 }
506
507 100 s->factor = av_clip_uint16(s->factor);
508
509 // Invert fade_factor if Fading Out
510
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100 if (s->type == FADE_OUT) {
511 50 s->factor=UINT16_MAX-s->factor;
512 }
513
514
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100 if (s->factor < UINT16_MAX) {
515
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39 if (s->alpha) {
516 ff_filter_execute(ctx, s->filter_slice_alpha, frame, NULL,
517 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
518
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39 } else if (s->is_rgb && !s->black_fade) {
519 ff_filter_execute(ctx, filter_slice_rgb, frame, NULL,
520 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
521 } else {
522 /* luma, or rgb plane in case of black */
523 39 ff_filter_execute(ctx, s->filter_slice_luma, frame, NULL,
524
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39 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
525
526
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39 if (frame->data[1] && frame->data[2] && !s->is_rgb) {
527 /* chroma planes */
528 39 ff_filter_execute(ctx, s->filter_slice_chroma, frame, NULL,
529
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39 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
530 }
531 }
532 }
533
534 100 return ff_filter_frame(inlink->dst->outputs[0], frame);
535 }
536
537
538 #define OFFSET(x) offsetof(FadeContext, x)
539 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
540
541 static const AVOption fade_options[] = {
542 { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, .unit = "type" },
543 { "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, .unit = "type" },
544 { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .flags = FLAGS, .unit = "type" },
545 { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .unit = "type" },
546 { "start_frame", "Number of the first frame to which to apply the effect.",
547 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
548 { "s", "Number of the first frame to which to apply the effect.",
549 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
550 { "nb_frames", "Number of frames to which the effect should be applied.",
551 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
552 { "n", "Number of frames to which the effect should be applied.",
553 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
554 { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, FLAGS },
555 { "start_time", "Number of seconds of the beginning of the effect.",
556 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
557 { "st", "Number of seconds of the beginning of the effect.",
558 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
559 { "duration", "Duration of the effect in seconds.",
560 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
561 { "d", "Duration of the effect in seconds.",
562 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
563 { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
564 { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
565 { NULL }
566 };
567
568 AVFILTER_DEFINE_CLASS(fade);
569
570 static const AVFilterPad avfilter_vf_fade_inputs[] = {
571 {
572 .name = "default",
573 .type = AVMEDIA_TYPE_VIDEO,
574 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
575 .config_props = config_input,
576 .filter_frame = filter_frame,
577 },
578 };
579
580 const FFFilter ff_vf_fade = {
581 .p.name = "fade",
582 .p.description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
583 .p.priv_class = &fade_class,
584 .p.flags = AVFILTER_FLAG_SLICE_THREADS |
585 AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
586 .init = init,
587 .priv_size = sizeof(FadeContext),
588 FILTER_INPUTS(avfilter_vf_fade_inputs),
589 FILTER_OUTPUTS(ff_video_default_filterpad),
590 FILTER_QUERY_FUNC2(query_formats),
591 };
592