FFmpeg
vf_fade.c
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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;
57  int hsub, vsub, bpp, depth;
62  int alpha;
63  int is_planar;
64  uint64_t start_time, duration;
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 
75 {
76  FadeContext *s = ctx->priv;
77 
78  s->fade_per_frame = (1 << 16) / s->nb_frames;
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) {
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) {
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 
105 {
106  const FadeContext *s = ctx->priv;
107  static const enum AVPixelFormat pix_fmts[] = {
127  };
128  static const enum AVPixelFormat pix_fmts_rgb[] = {
133  AV_PIX_FMT_NONE
134  };
135  static const enum AVPixelFormat pix_fmts_alpha[] = {
144  AV_PIX_FMT_NONE
145  };
146  static const enum AVPixelFormat pix_fmts_rgba[] = {
150  AV_PIX_FMT_NONE
151  };
152  AVFilterFormats *fmts_list;
153 
154  if (s->alpha) {
155  if (s->black_fade)
156  fmts_list = ff_make_format_list(pix_fmts_alpha);
157  else
158  fmts_list = ff_make_format_list(pix_fmts_rgba);
159  } else {
160  if (s->black_fade)
161  fmts_list = ff_make_format_list(pix_fmts);
162  else
163  fmts_list = ff_make_format_list(pix_fmts_rgb);
164  }
165  if (!fmts_list)
166  return AVERROR(ENOMEM);
167  return ff_set_common_formats(ctx, fmts_list);
168 }
169 
170 const static enum AVPixelFormat studio_level_pix_fmts[] = {
184 };
185 
187  int slice_start, int slice_end,
188  int do_alpha, int step)
189 {
190  int i, j;
191  const uint8_t r_idx = s->rgba_map[R];
192  const uint8_t g_idx = s->rgba_map[G];
193  const uint8_t b_idx = s->rgba_map[B];
194  const uint8_t a_idx = s->rgba_map[A];
195  const uint8_t *c = s->color_rgba;
196 
197  for (i = slice_start; i < slice_end; i++) {
198  uint8_t *p = frame->data[0] + i * frame->linesize[0];
199  for (j = 0; j < frame->width; j++) {
200 #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)
201  p[r_idx] = INTERP(r_idx, 0);
202  p[g_idx] = INTERP(g_idx, 1);
203  p[b_idx] = INTERP(b_idx, 2);
204  if (do_alpha)
205  p[a_idx] = INTERP(a_idx, 3);
206  p += step;
207  }
208  }
209 }
210 
212  int slice_start, int slice_end,
213  int do_alpha)
214 {
215  int i, j;
216  const uint8_t *c = s->color_rgba;
217 
218  for (i = slice_start; i < slice_end; i++) {
219  uint8_t *pg = frame->data[0] + i * frame->linesize[0];
220  uint8_t *pb = frame->data[1] + i * frame->linesize[1];
221  uint8_t *pr = frame->data[2] + i * frame->linesize[2];
222  uint8_t *pa = frame->data[3] + i * frame->linesize[3];
223  for (j = 0; j < frame->width; j++) {
224 #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)
225  pr[j] = INTERPP(pr[j], 0);
226  pg[j] = INTERPP(pg[j], 1);
227  pb[j] = INTERPP(pb[j], 2);
228  if (do_alpha)
229  pa[j] = INTERPP(pa[j], 3);
230  }
231  }
232 }
233 
234 static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
235  int nb_jobs)
236 {
237  FadeContext *s = ctx->priv;
238  AVFrame *frame = arg;
239  int slice_start = (frame->height * jobnr ) / nb_jobs;
240  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
241 
242  if (s->is_planar && s->alpha)
243  filter_rgb_planar(s, frame, slice_start, slice_end, 1);
244  else if (s->is_planar)
245  filter_rgb_planar(s, frame, slice_start, slice_end, 0);
246  else if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
247  else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
248  else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
249  else av_assert0(0);
250 
251  return 0;
252 }
253 
254 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
255  int nb_jobs)
256 {
257  FadeContext *s = ctx->priv;
258  AVFrame *frame = arg;
259  int slice_start = (frame->height * jobnr ) / nb_jobs;
260  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
261  int i, j;
262 
263  for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
264  for (i = slice_start; i < slice_end; i++) {
265  uint8_t *p = frame->data[k] + i * frame->linesize[k];
266  for (j = 0; j < frame->width * s->bpp; j++) {
267  /* s->factor is using 16 lower-order bits for decimal
268  * places. 32768 = 1 << 15, it is an integer representation
269  * of 0.5 and is for rounding. */
270  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
271  p++;
272  }
273  }
274  }
275 
276  return 0;
277 }
278 
279 static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr,
280  int nb_jobs)
281 {
282  FadeContext *s = ctx->priv;
283  AVFrame *frame = arg;
284  int slice_start = (frame->height * jobnr ) / nb_jobs;
285  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
286  int i, j;
287 
288  for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
289  for (i = slice_start; i < slice_end; i++) {
290  uint16_t *p = (uint16_t *)(frame->data[k] + i * frame->linesize[k]);
291  for (j = 0; j < frame->width * s->bpp; j++) {
292  /* s->factor is using 16 lower-order bits for decimal
293  * places. 32768 = 1 << 15, it is an integer representation
294  * of 0.5 and is for rounding. */
295  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
296  p++;
297  }
298  }
299  }
300 
301  return 0;
302 }
303 
304 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
305  int nb_jobs)
306 {
307  FadeContext *s = ctx->priv;
308  AVFrame *frame = arg;
309  int i, j, plane;
310  const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
311  const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
312  int slice_start = (height * jobnr ) / nb_jobs;
313  int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
314 
315  for (plane = 1; plane < 3; plane++) {
316  for (i = slice_start; i < slice_end; i++) {
317  uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
318  for (j = 0; j < width; j++) {
319  /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
320  * representation of 128.5. The .5 is for rounding
321  * purposes. */
322  *p = ((*p - 128) * s->factor + 8421367) >> 16;
323  p++;
324  }
325  }
326  }
327 
328  return 0;
329 }
330 
331 static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr,
332  int nb_jobs)
333 {
334  FadeContext *s = ctx->priv;
335  AVFrame *frame = arg;
336  int i, j, plane;
337  const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
338  const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
339  const int mid = 1 << (s->depth - 1);
340  const int add = ((mid << 1) + 1) << 15;
341  int slice_start = (height * jobnr ) / nb_jobs;
342  int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
343 
344  for (plane = 1; plane < 3; plane++) {
345  for (i = slice_start; i < slice_end; i++) {
346  uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]);
347  for (j = 0; j < width; j++) {
348  *p = ((*p - mid) * s->factor + add) >> 16;
349  p++;
350  }
351  }
352  }
353 
354  return 0;
355 }
356 
357 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
358  int nb_jobs)
359 {
360  FadeContext *s = ctx->priv;
361  AVFrame *frame = arg;
362  int plane = s->is_packed_rgb ? 0 : A;
363  int slice_start = (frame->height * jobnr ) / nb_jobs;
364  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
365  int i, j;
366 
367  for (i = slice_start; i < slice_end; i++) {
368  uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
369  int step = s->is_packed_rgb ? 4 : 1;
370  for (j = 0; j < frame->width; j++) {
371  /* s->factor is using 16 lower-order bits for decimal
372  * places. 32768 = 1 << 15, it is an integer representation
373  * of 0.5 and is for rounding. */
374  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
375  p += step;
376  }
377  }
378 
379  return 0;
380 }
381 
382 static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr,
383  int nb_jobs)
384 {
385  FadeContext *s = ctx->priv;
386  AVFrame *frame = arg;
387  int plane = s->is_packed_rgb ? 0 : A;
388  int slice_start = (frame->height * jobnr ) / nb_jobs;
389  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
390  int i, j;
391 
392  for (i = slice_start; i < slice_end; i++) {
393  uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]) + s->is_packed_rgb*s->rgba_map[A];
394  int step = s->is_packed_rgb ? 4 : 1;
395  for (j = 0; j < frame->width; j++) {
396  /* s->factor is using 16 lower-order bits for decimal
397  * places. 32768 = 1 << 15, it is an integer representation
398  * of 0.5 and is for rounding. */
399  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
400  p += step;
401  }
402  }
403 
404  return 0;
405 }
406 
408 {
409  FadeContext *s = inlink->dst->priv;
410  const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
411 
412  s->hsub = pixdesc->log2_chroma_w;
413  s->vsub = pixdesc->log2_chroma_h;
414 
415  ff_fill_rgba_map(s->rgba_map, inlink->format);
416 
417  s->depth = pixdesc->comp[0].depth;
418  s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
419  1 :
420  av_get_bits_per_pixel(pixdesc) >> 3;
421  s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
422  s->is_planar = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR;
423  s->is_rgb = pixdesc->flags & AV_PIX_FMT_FLAG_RGB;
424  s->is_packed_rgb = !s->is_planar && s->is_rgb;
425 
426  if (s->duration)
428  if (s->start_time)
430 
431  /* use CCIR601/709 black level for studio-level pixel non-alpha components */
432  s->black_level =
433  ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 * (1 << (s->depth - 8)): 0;
434  /* 32768 = 1 << 15, it is an integer representation
435  * of 0.5 and is for rounding. */
436  s->black_level_scaled = (s->black_level << 16) + 32768;
437 
441 
442  return 0;
443 }
444 
446 {
447  AVFilterContext *ctx = inlink->dst;
448  FadeContext *s = ctx->priv;
449 
450  // Calculate Fade assuming this is a Fade In
451  if (s->fade_state == VF_FADE_WAITING) {
452  s->factor=0;
453  if (frame->pts >= s->start_time_pts
454  && inlink->frame_count_out >= s->start_frame) {
455  // Time to start fading
457 
458  // Save start time in case we are starting based on frames and fading based on time
459  if (s->start_time_pts == 0 && s->start_frame != 0) {
460  s->start_time_pts = frame->pts;
461  }
462 
463  // Save start frame in case we are starting based on time and fading based on frames
464  if (s->start_time_pts != 0 && s->start_frame == 0) {
465  s->start_frame = inlink->frame_count_out;
466  }
467  }
468  }
469  if (s->fade_state == VF_FADE_FADING) {
470  if (s->duration_pts == 0) {
471  // Fading based on frame count
472  s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
473  if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
475  }
476 
477  } else {
478  // Fading based on duration
479  s->factor = (frame->pts - s->start_time_pts) * UINT16_MAX / s->duration_pts;
480  if (frame->pts > s->start_time_pts + s->duration_pts) {
482  }
483  }
484  }
485  if (s->fade_state == VF_FADE_DONE) {
486  s->factor=UINT16_MAX;
487  }
488 
489  s->factor = av_clip_uint16(s->factor);
490 
491  // Invert fade_factor if Fading Out
492  if (s->type == FADE_OUT) {
493  s->factor=UINT16_MAX-s->factor;
494  }
495 
496  if (s->factor < UINT16_MAX) {
497  if (s->alpha) {
498  ctx->internal->execute(ctx, s->filter_slice_alpha, frame, NULL,
499  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
500  } else if (s->is_rgb && !s->black_fade) {
501  ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
502  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
503  } else {
504  /* luma, or rgb plane in case of black */
505  ctx->internal->execute(ctx, s->filter_slice_luma, frame, NULL,
506  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
507 
508  if (frame->data[1] && frame->data[2] && !s->is_rgb) {
509  /* chroma planes */
510  ctx->internal->execute(ctx, s->filter_slice_chroma, frame, NULL,
511  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
512  }
513  }
514  }
515 
516  return ff_filter_frame(inlink->dst->outputs[0], frame);
517 }
518 
519 
520 #define OFFSET(x) offsetof(FadeContext, x)
521 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
522 
523 static const AVOption fade_options[] = {
524  { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
525  { "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
526  { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .flags = FLAGS, .unit = "type" },
527  { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .unit = "type" },
528  { "start_frame", "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  { "s", "Number of the first frame to which to apply the effect.",
531  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
532  { "nb_frames", "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  { "n", "Number of frames to which the effect should be applied.",
535  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
536  { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, FLAGS },
537  { "start_time", "Number of seconds of the beginning of the effect.",
538  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
539  { "st", "Number of seconds of the beginning of the effect.",
540  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
541  { "duration", "Duration of the effect in seconds.",
542  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
543  { "d", "Duration of the effect in seconds.",
544  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
545  { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
546  { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
547  { NULL }
548 };
549 
551 
553  {
554  .name = "default",
555  .type = AVMEDIA_TYPE_VIDEO,
556  .config_props = config_input,
557  .filter_frame = filter_frame,
558  .needs_writable = 1,
559  },
560  { NULL }
561 };
562 
564  {
565  .name = "default",
566  .type = AVMEDIA_TYPE_VIDEO,
567  },
568  { NULL }
569 };
570 
572  .name = "fade",
573  .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
574  .init = init,
575  .priv_size = sizeof(FadeContext),
576  .priv_class = &fade_class,
578  .inputs = avfilter_vf_fade_inputs,
579  .outputs = avfilter_vf_fade_outputs,
581 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
static const AVFilterPad avfilter_vf_fade_outputs[]
Definition: vf_fade.c:563
AVOption.
Definition: opt.h:248
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
int bpp
Definition: vf_fade.c:57
uint8_t is_rgb
Definition: vf_fade.c:59
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
#define INTERPP(c_name, c_idx)
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2525
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
unsigned int black_level
Definition: vf_fade.c:58
GLint GLenum type
Definition: opengl_enc.c:104
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
static const AVOption fade_options[]
Definition: vf_fade.c:523
static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:331
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:287
const char * name
Pad name.
Definition: internal.h:60
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1091
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
uint64_t duration
Definition: vf_fade.c:64
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:88
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:179
AVOptions.
#define FLAGS
Definition: vf_fade.c:521
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:407
#define INTERP(c_name, c_idx)
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
int black_fade
if color_rgba is black
Definition: vf_fade.c:68
#define height
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
int alpha
Definition: vf_fade.c:62
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
int ff_fmt_is_in(int fmt, const int *fmts)
Tell if an integer is contained in the provided -1-terminated list of integers.
Definition: formats.c:258
#define av_log(a,...)
static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha, int step)
Definition: vf_fade.c:186
A filter pad used for either input or output.
Definition: internal.h:54
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
static int query_formats(AVFilterContext *ctx)
Definition: vf_fade.c:104
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
int width
Definition: frame.h:372
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:588
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
static void fade(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, int width, int height, int alpha, int beta)
Definition: vp8.c:491
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fade.c:74
int(* filter_slice_chroma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:70
uint8_t is_packed_rgb
Definition: vf_fade.c:60
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
void * priv
private data for use by the filter
Definition: avfilter.h:356
uint64_t start_time
Definition: vf_fade.c:64
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
#define A
Definition: vf_fade.c:43
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_fade.c:445
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
int fade_per_frame
Definition: vf_fade.c:55
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:800
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:234
#define FFMIN(a, b)
Definition: common.h:96
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:440
#define width
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:279
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
static const AVFilterPad avfilter_vf_fade_inputs[]
Definition: vf_fade.c:552
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:382
if(ret)
#define FADE_OUT
Definition: vf_fade.c:50
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
int(* filter_slice_alpha)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:71
AVFilter ff_vf_fade
Definition: vf_fade.c:571
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
misc drawing utilities
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int start_frame
Definition: vf_fade.c:56
enum FadeContext::@226 fade_state
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Describe the class of an AVClass context structure.
Definition: log.h:67
int vsub
Definition: vf_fade.c:57
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
static enum AVPixelFormat pix_fmts_rgb[3]
Definition: av1_parser.c:48
int type
Definition: vf_fade.c:54
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:300
#define FADE_IN
Definition: vf_fade.c:49
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
uint64_t start_time_pts
Definition: vf_fade.c:65
#define flags(name, subs,...)
Definition: cbs_av1.c:560
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
uint8_t color_rgba[4]
fade color
Definition: vf_fade.c:67
int
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal and external API header
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
int nb_frames
Definition: vf_fade.c:56
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
#define OFFSET(x)
Definition: vf_fade.c:520
avfilter_execute_func * execute
Definition: internal.h:136
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2035
static av_always_inline void filter_rgb_planar(FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha)
Definition: vf_fade.c:211
static int config_input(AVFilterLink *inlink)
Definition: vf_fade.c:407
int factor
Definition: vf_fade.c:55
unsigned int black_level_scaled
Definition: vf_fade.c:58
int hsub
Definition: vf_fade.c:57
A list of supported formats for one end of a filter link.
Definition: formats.h:65
An instance of a filter.
Definition: avfilter.h:341
static float add(float src0, float src1)
uint8_t rgba_map[4]
Definition: vf_fade.c:61
int height
Definition: frame.h:372
#define G
Definition: vf_fade.c:41
int is_planar
Definition: vf_fade.c:63
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
#define av_always_inline
Definition: attributes.h:45
#define R
Definition: vf_fade.c:40
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define B
Definition: vf_fade.c:42
int depth
Number of bits in the component.
Definition: pixdesc.h:58
static const enum AVPixelFormat studio_level_pix_fmts[]
Definition: vf_fade.c:170
int depth
Definition: vf_fade.c:57
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
int i
Definition: input.c:407
uint64_t duration_pts
Definition: vf_fade.c:65
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:439
int(* filter_slice_luma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:69
simple arithmetic expression evaluator
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
AVFILTER_DEFINE_CLASS(fade)