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 "formats.h"
37 #include "internal.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
init(AVFilterContext * ctx)74 static av_cold int init(AVFilterContext *ctx)
75 {
76 FadeContext *s = ctx->priv;
77
78 s->fade_per_frame = (1 << 16) / s->nb_frames;
79 s->fade_state = VF_FADE_WAITING;
80
81 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 if (s->start_frame || s->nb_frames) {
88 av_log(ctx, AV_LOG_VERBOSE,
89 "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
90 s->type == FADE_IN ? "in" : "out", s->start_frame,
91 s->nb_frames,s->alpha);
92 }
93 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 s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
101 return 0;
102 }
103
query_formats(AVFilterContext * ctx)104 static int query_formats(AVFilterContext *ctx)
105 {
106 const FadeContext *s = ctx->priv;
107 static const enum AVPixelFormat pix_fmts[] = {
108 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
109 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
110 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
111 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
112 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
113 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
114 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
115 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
116 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
117 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
118 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
119 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
120 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
121 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
122 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
123 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
124 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
125 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
126 AV_PIX_FMT_NONE
127 };
128 static const enum AVPixelFormat pix_fmts_rgb[] = {
129 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
130 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
131 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
132 AV_PIX_FMT_GBRP,
133 AV_PIX_FMT_NONE
134 };
135 static const enum AVPixelFormat pix_fmts_alpha[] = {
136 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
137 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
138 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
139 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
140 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
141 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
142 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
143 AV_PIX_FMT_GBRAP,
144 AV_PIX_FMT_NONE
145 };
146 static const enum AVPixelFormat pix_fmts_rgba[] = {
147 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
148 AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
149 AV_PIX_FMT_GBRAP,
150 AV_PIX_FMT_NONE
151 };
152 const enum AVPixelFormat *pixel_fmts;
153
154 if (s->alpha) {
155 if (s->black_fade)
156 pixel_fmts = pix_fmts_alpha;
157 else
158 pixel_fmts = pix_fmts_rgba;
159 } else {
160 if (s->black_fade)
161 pixel_fmts = pix_fmts;
162 else
163 pixel_fmts = pix_fmts_rgb;
164 }
165 return ff_set_common_formats_from_list(ctx, pixel_fmts);
166 }
167
168 const static enum AVPixelFormat studio_level_pix_fmts[] = {
169 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
170 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
171 AV_PIX_FMT_YUV440P,
172 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
173 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
174 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
175 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
176 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
177 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
178 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
179 AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
180 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
181 AV_PIX_FMT_NONE
182 };
183
filter_rgb(FadeContext * s,const AVFrame * frame,int slice_start,int slice_end,int do_alpha,int step)184 static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame,
185 int slice_start, int slice_end,
186 int do_alpha, int step)
187 {
188 int i, j;
189 const uint8_t r_idx = s->rgba_map[R];
190 const uint8_t g_idx = s->rgba_map[G];
191 const uint8_t b_idx = s->rgba_map[B];
192 const uint8_t a_idx = s->rgba_map[A];
193 const uint8_t *c = s->color_rgba;
194
195 for (i = slice_start; i < slice_end; i++) {
196 uint8_t *p = frame->data[0] + i * frame->linesize[0];
197 for (j = 0; j < frame->width; j++) {
198 #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)
199 p[r_idx] = INTERP(r_idx, 0);
200 p[g_idx] = INTERP(g_idx, 1);
201 p[b_idx] = INTERP(b_idx, 2);
202 if (do_alpha)
203 p[a_idx] = INTERP(a_idx, 3);
204 p += step;
205 }
206 }
207 }
208
filter_rgb_planar(FadeContext * s,const AVFrame * frame,int slice_start,int slice_end,int do_alpha)209 static av_always_inline void filter_rgb_planar(FadeContext *s, const AVFrame *frame,
210 int slice_start, int slice_end,
211 int do_alpha)
212 {
213 int i, j;
214 const uint8_t *c = s->color_rgba;
215
216 for (i = slice_start; i < slice_end; i++) {
217 uint8_t *pg = frame->data[0] + i * frame->linesize[0];
218 uint8_t *pb = frame->data[1] + i * frame->linesize[1];
219 uint8_t *pr = frame->data[2] + i * frame->linesize[2];
220 uint8_t *pa = frame->data[3] + i * frame->linesize[3];
221 for (j = 0; j < frame->width; j++) {
222 #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)
223 pr[j] = INTERPP(pr[j], 0);
224 pg[j] = INTERPP(pg[j], 1);
225 pb[j] = INTERPP(pb[j], 2);
226 if (do_alpha)
227 pa[j] = INTERPP(pa[j], 3);
228 }
229 }
230 }
231
filter_slice_rgb(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)232 static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
233 int nb_jobs)
234 {
235 FadeContext *s = ctx->priv;
236 AVFrame *frame = arg;
237 int slice_start = (frame->height * jobnr ) / nb_jobs;
238 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
239
240 if (s->is_planar && s->alpha)
241 filter_rgb_planar(s, frame, slice_start, slice_end, 1);
242 else if (s->is_planar)
243 filter_rgb_planar(s, frame, slice_start, slice_end, 0);
244 else if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
245 else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
246 else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
247 else av_assert0(0);
248
249 return 0;
250 }
251
filter_slice_luma(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)252 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
253 int nb_jobs)
254 {
255 FadeContext *s = ctx->priv;
256 AVFrame *frame = arg;
257 int slice_start = (frame->height * jobnr ) / nb_jobs;
258 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
259 int i, j;
260
261 for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
262 for (i = slice_start; i < slice_end; i++) {
263 uint8_t *p = frame->data[k] + i * frame->linesize[k];
264 for (j = 0; j < frame->width * s->bpp; j++) {
265 /* s->factor is using 16 lower-order bits for decimal
266 * places. 32768 = 1 << 15, it is an integer representation
267 * of 0.5 and is for rounding. */
268 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
269 p++;
270 }
271 }
272 }
273
274 return 0;
275 }
276
filter_slice_luma16(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)277 static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr,
278 int nb_jobs)
279 {
280 FadeContext *s = ctx->priv;
281 AVFrame *frame = arg;
282 int slice_start = (frame->height * jobnr ) / nb_jobs;
283 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
284 int i, j;
285
286 for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
287 for (i = slice_start; i < slice_end; i++) {
288 uint16_t *p = (uint16_t *)(frame->data[k] + i * frame->linesize[k]);
289 for (j = 0; j < frame->width * s->bpp; j++) {
290 /* s->factor is using 16 lower-order bits for decimal
291 * places. 32768 = 1 << 15, it is an integer representation
292 * of 0.5 and is for rounding. */
293 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
294 p++;
295 }
296 }
297 }
298
299 return 0;
300 }
301
filter_slice_chroma(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)302 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
303 int nb_jobs)
304 {
305 FadeContext *s = ctx->priv;
306 AVFrame *frame = arg;
307 int i, j, plane;
308 const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
309 const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
310 int slice_start = (height * jobnr ) / nb_jobs;
311 int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
312
313 for (plane = 1; plane < 3; plane++) {
314 for (i = slice_start; i < slice_end; i++) {
315 uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
316 for (j = 0; j < width; j++) {
317 /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
318 * representation of 128.5. The .5 is for rounding
319 * purposes. */
320 *p = ((*p - 128) * s->factor + 8421367) >> 16;
321 p++;
322 }
323 }
324 }
325
326 return 0;
327 }
328
filter_slice_chroma16(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)329 static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr,
330 int nb_jobs)
331 {
332 FadeContext *s = ctx->priv;
333 AVFrame *frame = arg;
334 int i, j, plane;
335 const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
336 const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
337 const int mid = 1 << (s->depth - 1);
338 const int add = ((mid << 1) + 1) << 15;
339 int slice_start = (height * jobnr ) / nb_jobs;
340 int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
341
342 for (plane = 1; plane < 3; plane++) {
343 for (i = slice_start; i < slice_end; i++) {
344 uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]);
345 for (j = 0; j < width; j++) {
346 *p = ((*p - mid) * s->factor + add) >> 16;
347 p++;
348 }
349 }
350 }
351
352 return 0;
353 }
354
filter_slice_alpha(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)355 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
356 int nb_jobs)
357 {
358 FadeContext *s = ctx->priv;
359 AVFrame *frame = arg;
360 int plane = s->is_packed_rgb ? 0 : A;
361 int slice_start = (frame->height * jobnr ) / nb_jobs;
362 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
363 int i, j;
364
365 for (i = slice_start; i < slice_end; i++) {
366 uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
367 int step = s->is_packed_rgb ? 4 : 1;
368 for (j = 0; j < frame->width; j++) {
369 /* s->factor is using 16 lower-order bits for decimal
370 * places. 32768 = 1 << 15, it is an integer representation
371 * of 0.5 and is for rounding. */
372 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
373 p += step;
374 }
375 }
376
377 return 0;
378 }
379
filter_slice_alpha16(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)380 static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr,
381 int nb_jobs)
382 {
383 FadeContext *s = ctx->priv;
384 AVFrame *frame = arg;
385 int plane = s->is_packed_rgb ? 0 : A;
386 int slice_start = (frame->height * jobnr ) / nb_jobs;
387 int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
388 int i, j;
389
390 for (i = slice_start; i < slice_end; i++) {
391 uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]) + s->is_packed_rgb*s->rgba_map[A];
392 int step = s->is_packed_rgb ? 4 : 1;
393 for (j = 0; j < frame->width; j++) {
394 /* s->factor is using 16 lower-order bits for decimal
395 * places. 32768 = 1 << 15, it is an integer representation
396 * of 0.5 and is for rounding. */
397 *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
398 p += step;
399 }
400 }
401
402 return 0;
403 }
404
config_input(AVFilterLink * inlink)405 static int config_input(AVFilterLink *inlink)
406 {
407 FadeContext *s = inlink->dst->priv;
408 const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
409
410 s->hsub = pixdesc->log2_chroma_w;
411 s->vsub = pixdesc->log2_chroma_h;
412
413 ff_fill_rgba_map(s->rgba_map, inlink->format);
414
415 s->depth = pixdesc->comp[0].depth;
416 s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
417 1 :
418 av_get_bits_per_pixel(pixdesc) >> 3;
419 s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
420 s->is_planar = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR;
421 s->is_rgb = pixdesc->flags & AV_PIX_FMT_FLAG_RGB;
422 s->is_packed_rgb = !s->is_planar && s->is_rgb;
423
424 if (s->duration)
425 s->duration_pts = av_rescale_q(s->duration, AV_TIME_BASE_Q, inlink->time_base);
426 if (s->start_time)
427 s->start_time_pts = av_rescale_q(s->start_time, AV_TIME_BASE_Q, inlink->time_base);
428
429 /* use CCIR601/709 black level for studio-level pixel non-alpha components */
430 s->black_level =
431 ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 * (1 << (s->depth - 8)): 0;
432 /* 32768 = 1 << 15, it is an integer representation
433 * of 0.5 and is for rounding. */
434 s->black_level_scaled = (s->black_level << 16) + 32768;
435
436 s->filter_slice_luma = s->depth <= 8 ? filter_slice_luma : filter_slice_luma16;
437 s->filter_slice_chroma = s->depth <= 8 ? filter_slice_chroma : filter_slice_chroma16;
438 s->filter_slice_alpha = s->depth <= 8 ? filter_slice_alpha : filter_slice_alpha16;
439
440 return 0;
441 }
442
filter_frame(AVFilterLink * inlink,AVFrame * frame)443 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
444 {
445 AVFilterContext *ctx = inlink->dst;
446 FadeContext *s = ctx->priv;
447
448 // Calculate Fade assuming this is a Fade In
449 if (s->fade_state == VF_FADE_WAITING) {
450 s->factor=0;
451 if (frame->pts >= s->start_time_pts
452 && inlink->frame_count_out >= s->start_frame) {
453 // Time to start fading
454 s->fade_state = VF_FADE_FADING;
455
456 // Save start time in case we are starting based on frames and fading based on time
457 if (s->start_time_pts == 0 && s->start_frame != 0) {
458 s->start_time_pts = frame->pts;
459 }
460
461 // Save start frame in case we are starting based on time and fading based on frames
462 if (s->start_time_pts != 0 && s->start_frame == 0) {
463 s->start_frame = inlink->frame_count_out;
464 }
465 }
466 }
467 if (s->fade_state == VF_FADE_FADING) {
468 if (s->duration_pts == 0) {
469 // Fading based on frame count
470 s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
471 if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
472 s->fade_state = VF_FADE_DONE;
473 }
474
475 } else {
476 // Fading based on duration
477 s->factor = (frame->pts - s->start_time_pts) * UINT16_MAX / s->duration_pts;
478 if (frame->pts > s->start_time_pts + s->duration_pts) {
479 s->fade_state = VF_FADE_DONE;
480 }
481 }
482 }
483 if (s->fade_state == VF_FADE_DONE) {
484 s->factor=UINT16_MAX;
485 }
486
487 s->factor = av_clip_uint16(s->factor);
488
489 // Invert fade_factor if Fading Out
490 if (s->type == FADE_OUT) {
491 s->factor=UINT16_MAX-s->factor;
492 }
493
494 if (s->factor < UINT16_MAX) {
495 if (s->alpha) {
496 ff_filter_execute(ctx, s->filter_slice_alpha, frame, NULL,
497 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
498 } else if (s->is_rgb && !s->black_fade) {
499 ff_filter_execute(ctx, filter_slice_rgb, frame, NULL,
500 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
501 } else {
502 /* luma, or rgb plane in case of black */
503 ff_filter_execute(ctx, s->filter_slice_luma, frame, NULL,
504 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
505
506 if (frame->data[1] && frame->data[2] && !s->is_rgb) {
507 /* chroma planes */
508 ff_filter_execute(ctx, s->filter_slice_chroma, frame, NULL,
509 FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
510 }
511 }
512 }
513
514 return ff_filter_frame(inlink->dst->outputs[0], frame);
515 }
516
517
518 #define OFFSET(x) offsetof(FadeContext, x)
519 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
520
521 static const AVOption fade_options[] = {
522 { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
523 { "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
524 { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .flags = FLAGS, .unit = "type" },
525 { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .unit = "type" },
526 { "start_frame", "Number of the first frame to which to apply the effect.",
527 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
528 { "s", "Number of the first frame to which to apply the effect.",
529 OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
530 { "nb_frames", "Number of frames to which the effect should be applied.",
531 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
532 { "n", "Number of frames to which the effect should be applied.",
533 OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
534 { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, FLAGS },
535 { "start_time", "Number of seconds of the beginning of the effect.",
536 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
537 { "st", "Number of seconds of the beginning of the effect.",
538 OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
539 { "duration", "Duration of the effect in seconds.",
540 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
541 { "d", "Duration of the effect in seconds.",
542 OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
543 { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
544 { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
545 { NULL }
546 };
547
548 AVFILTER_DEFINE_CLASS(fade);
549
550 static const AVFilterPad avfilter_vf_fade_inputs[] = {
551 {
552 .name = "default",
553 .type = AVMEDIA_TYPE_VIDEO,
554 .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
555 .config_props = config_input,
556 .filter_frame = filter_frame,
557 },
558 };
559
560 static const AVFilterPad avfilter_vf_fade_outputs[] = {
561 {
562 .name = "default",
563 .type = AVMEDIA_TYPE_VIDEO,
564 },
565 };
566
567 const AVFilter ff_vf_fade = {
568 .name = "fade",
569 .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
570 .init = init,
571 .priv_size = sizeof(FadeContext),
572 .priv_class = &fade_class,
573 FILTER_INPUTS(avfilter_vf_fade_inputs),
574 FILTER_OUTPUTS(avfilter_vf_fade_outputs),
575 FILTER_QUERY_FUNC(query_formats),
576 .flags = AVFILTER_FLAG_SLICE_THREADS |
577 AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
578 };
579