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;
66  uint8_t color_rgba[4]; ///< fade color
67  int black_fade; ///< if color_rgba is black
68  int (*filter_slice_luma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
69  int (*filter_slice_chroma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
70  int (*filter_slice_alpha)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
71 } FadeContext;
72 
74 {
75  FadeContext *s = ctx->priv;
76 
77  s->fade_per_frame = (1 << 16) / s->nb_frames;
79 
80  if (s->duration != 0) {
81  // If duration (seconds) is non-zero, assume that we are not fading based on frames
82  s->nb_frames = 0; // Mostly to clean up logging
83  }
84 
85  // Choose what to log. If both time-based and frame-based options, both lines will be in the log
86  if (s->start_frame || s->nb_frames) {
88  "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
89  s->type == FADE_IN ? "in" : "out", s->start_frame,
90  s->nb_frames,s->alpha);
91  }
92  if (s->start_time || s->duration) {
94  "type:%s start_time:%f duration:%f alpha:%d\n",
95  s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
96  (s->duration / (double)AV_TIME_BASE),s->alpha);
97  }
98 
99  s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
100  return 0;
101 }
102 
104 {
105  const FadeContext *s = ctx->priv;
106  static const enum AVPixelFormat pix_fmts[] = {
126  };
127  static const enum AVPixelFormat pix_fmts_rgb[] = {
132  AV_PIX_FMT_NONE
133  };
134  static const enum AVPixelFormat pix_fmts_alpha[] = {
143  AV_PIX_FMT_NONE
144  };
145  static const enum AVPixelFormat pix_fmts_rgba[] = {
149  AV_PIX_FMT_NONE
150  };
151  AVFilterFormats *fmts_list;
152 
153  if (s->alpha) {
154  if (s->black_fade)
155  fmts_list = ff_make_format_list(pix_fmts_alpha);
156  else
157  fmts_list = ff_make_format_list(pix_fmts_rgba);
158  } else {
159  if (s->black_fade)
160  fmts_list = ff_make_format_list(pix_fmts);
161  else
162  fmts_list = ff_make_format_list(pix_fmts_rgb);
163  }
164  if (!fmts_list)
165  return AVERROR(ENOMEM);
166  return ff_set_common_formats(ctx, fmts_list);
167 }
168 
169 const static enum AVPixelFormat studio_level_pix_fmts[] = {
183 };
184 
186  int slice_start, int slice_end,
187  int do_alpha, int step)
188 {
189  int i, j;
190  const uint8_t r_idx = s->rgba_map[R];
191  const uint8_t g_idx = s->rgba_map[G];
192  const uint8_t b_idx = s->rgba_map[B];
193  const uint8_t a_idx = s->rgba_map[A];
194  const uint8_t *c = s->color_rgba;
195 
196  for (i = slice_start; i < slice_end; i++) {
197  uint8_t *p = frame->data[0] + i * frame->linesize[0];
198  for (j = 0; j < frame->width; j++) {
199 #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)
200  p[r_idx] = INTERP(r_idx, 0);
201  p[g_idx] = INTERP(g_idx, 1);
202  p[b_idx] = INTERP(b_idx, 2);
203  if (do_alpha)
204  p[a_idx] = INTERP(a_idx, 3);
205  p += step;
206  }
207  }
208 }
209 
211  int slice_start, int slice_end,
212  int do_alpha)
213 {
214  int i, j;
215  const uint8_t *c = s->color_rgba;
216 
217  for (i = slice_start; i < slice_end; i++) {
218  uint8_t *pg = frame->data[0] + i * frame->linesize[0];
219  uint8_t *pb = frame->data[1] + i * frame->linesize[1];
220  uint8_t *pr = frame->data[2] + i * frame->linesize[2];
221  uint8_t *pa = frame->data[3] + i * frame->linesize[3];
222  for (j = 0; j < frame->width; j++) {
223 #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)
224  pr[j] = INTERPP(pr[j], 0);
225  pg[j] = INTERPP(pg[j], 1);
226  pb[j] = INTERPP(pb[j], 2);
227  if (do_alpha)
228  pa[j] = INTERPP(pa[j], 3);
229  }
230  }
231 }
232 
233 static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
234  int nb_jobs)
235 {
236  FadeContext *s = ctx->priv;
237  AVFrame *frame = arg;
238  int slice_start = (frame->height * jobnr ) / nb_jobs;
239  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
240 
241  if (s->is_planar && s->alpha)
242  filter_rgb_planar(s, frame, slice_start, slice_end, 1);
243  else if (s->is_planar)
244  filter_rgb_planar(s, frame, slice_start, slice_end, 0);
245  else if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
246  else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
247  else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
248  else av_assert0(0);
249 
250  return 0;
251 }
252 
253 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
254  int nb_jobs)
255 {
256  FadeContext *s = ctx->priv;
257  AVFrame *frame = arg;
258  int slice_start = (frame->height * jobnr ) / nb_jobs;
259  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
260  int i, j;
261 
262  for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
263  for (i = slice_start; i < slice_end; i++) {
264  uint8_t *p = frame->data[k] + i * frame->linesize[k];
265  for (j = 0; j < frame->width * s->bpp; j++) {
266  /* s->factor is using 16 lower-order bits for decimal
267  * places. 32768 = 1 << 15, it is an integer representation
268  * of 0.5 and is for rounding. */
269  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
270  p++;
271  }
272  }
273  }
274 
275  return 0;
276 }
277 
278 static int filter_slice_luma16(AVFilterContext *ctx, void *arg, int jobnr,
279  int nb_jobs)
280 {
281  FadeContext *s = ctx->priv;
282  AVFrame *frame = arg;
283  int slice_start = (frame->height * jobnr ) / nb_jobs;
284  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
285  int i, j;
286 
287  for (int k = 0; k < 1 + 2 * (s->is_planar && s->is_rgb); k++) {
288  for (i = slice_start; i < slice_end; i++) {
289  uint16_t *p = (uint16_t *)(frame->data[k] + i * frame->linesize[k]);
290  for (j = 0; j < frame->width * s->bpp; j++) {
291  /* s->factor is using 16 lower-order bits for decimal
292  * places. 32768 = 1 << 15, it is an integer representation
293  * of 0.5 and is for rounding. */
294  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
295  p++;
296  }
297  }
298  }
299 
300  return 0;
301 }
302 
303 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
304  int nb_jobs)
305 {
306  FadeContext *s = ctx->priv;
307  AVFrame *frame = arg;
308  int i, j, plane;
309  const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
310  const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
311  int slice_start = (height * jobnr ) / nb_jobs;
312  int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
313 
314  for (plane = 1; plane < 3; plane++) {
315  for (i = slice_start; i < slice_end; i++) {
316  uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
317  for (j = 0; j < width; j++) {
318  /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
319  * representation of 128.5. The .5 is for rounding
320  * purposes. */
321  *p = ((*p - 128) * s->factor + 8421367) >> 16;
322  p++;
323  }
324  }
325  }
326 
327  return 0;
328 }
329 
330 static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr,
331  int nb_jobs)
332 {
333  FadeContext *s = ctx->priv;
334  AVFrame *frame = arg;
335  int i, j, plane;
336  const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
337  const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
338  const int mid = 1 << (s->depth - 1);
339  const int add = ((mid << 1) + 1) << 15;
340  int slice_start = (height * jobnr ) / nb_jobs;
341  int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
342 
343  for (plane = 1; plane < 3; plane++) {
344  for (i = slice_start; i < slice_end; i++) {
345  uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]);
346  for (j = 0; j < width; j++) {
347  *p = ((*p - mid) * s->factor + add) >> 16;
348  p++;
349  }
350  }
351  }
352 
353  return 0;
354 }
355 
356 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
357  int nb_jobs)
358 {
359  FadeContext *s = ctx->priv;
360  AVFrame *frame = arg;
361  int plane = s->is_packed_rgb ? 0 : A;
362  int slice_start = (frame->height * jobnr ) / nb_jobs;
363  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
364  int i, j;
365 
366  for (i = slice_start; i < slice_end; i++) {
367  uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
368  int step = s->is_packed_rgb ? 4 : 1;
369  for (j = 0; j < frame->width; j++) {
370  /* s->factor is using 16 lower-order bits for decimal
371  * places. 32768 = 1 << 15, it is an integer representation
372  * of 0.5 and is for rounding. */
373  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
374  p += step;
375  }
376  }
377 
378  return 0;
379 }
380 
381 static int filter_slice_alpha16(AVFilterContext *ctx, void *arg, int jobnr,
382  int nb_jobs)
383 {
384  FadeContext *s = ctx->priv;
385  AVFrame *frame = arg;
386  int plane = s->is_packed_rgb ? 0 : A;
387  int slice_start = (frame->height * jobnr ) / nb_jobs;
388  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
389  int i, j;
390 
391  for (i = slice_start; i < slice_end; i++) {
392  uint16_t *p = (uint16_t *)(frame->data[plane] + i * frame->linesize[plane]) + s->is_packed_rgb*s->rgba_map[A];
393  int step = s->is_packed_rgb ? 4 : 1;
394  for (j = 0; j < frame->width; j++) {
395  /* s->factor is using 16 lower-order bits for decimal
396  * places. 32768 = 1 << 15, it is an integer representation
397  * of 0.5 and is for rounding. */
398  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
399  p += step;
400  }
401  }
402 
403  return 0;
404 }
405 
407 {
408  FadeContext *s = inlink->dst->priv;
409  const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
410 
411  s->hsub = pixdesc->log2_chroma_w;
412  s->vsub = pixdesc->log2_chroma_h;
413 
414  ff_fill_rgba_map(s->rgba_map, inlink->format);
415 
416  s->depth = pixdesc->comp[0].depth;
417  s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
418  1 :
419  av_get_bits_per_pixel(pixdesc) >> 3;
420  s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
421  s->is_planar = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR;
422  s->is_rgb = pixdesc->flags & AV_PIX_FMT_FLAG_RGB;
423  s->is_packed_rgb = !s->is_planar && s->is_rgb;
424 
425  /* use CCIR601/709 black level for studio-level pixel non-alpha components */
426  s->black_level =
427  ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 * (1 << (s->depth - 8)): 0;
428  /* 32768 = 1 << 15, it is an integer representation
429  * of 0.5 and is for rounding. */
430  s->black_level_scaled = (s->black_level << 16) + 32768;
431 
435 
436  return 0;
437 }
438 
440 {
441  AVFilterContext *ctx = inlink->dst;
442  FadeContext *s = ctx->priv;
443  double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
444 
445  // Calculate Fade assuming this is a Fade In
446  if (s->fade_state == VF_FADE_WAITING) {
447  s->factor=0;
448  if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
449  && inlink->frame_count_out >= s->start_frame) {
450  // Time to start fading
452 
453  // Save start time in case we are starting based on frames and fading based on time
454  if (s->start_time == 0 && s->start_frame != 0) {
455  s->start_time = frame_timestamp*(double)AV_TIME_BASE;
456  }
457 
458  // Save start frame in case we are starting based on time and fading based on frames
459  if (s->start_time != 0 && s->start_frame == 0) {
460  s->start_frame = inlink->frame_count_out;
461  }
462  }
463  }
464  if (s->fade_state == VF_FADE_FADING) {
465  if (s->duration == 0) {
466  // Fading based on frame count
467  s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
468  if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
470  }
471 
472  } else {
473  // Fading based on duration
474  s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
475  * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
476  if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
477  + s->duration/(double)AV_TIME_BASE) {
479  }
480  }
481  }
482  if (s->fade_state == VF_FADE_DONE) {
483  s->factor=UINT16_MAX;
484  }
485 
486  s->factor = av_clip_uint16(s->factor);
487 
488  // Invert fade_factor if Fading Out
489  if (s->type == FADE_OUT) {
490  s->factor=UINT16_MAX-s->factor;
491  }
492 
493  if (s->factor < UINT16_MAX) {
494  if (s->alpha) {
495  ctx->internal->execute(ctx, s->filter_slice_alpha, frame, NULL,
496  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
497  } else if (s->is_rgb && !s->black_fade) {
498  ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
499  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
500  } else {
501  /* luma, or rgb plane in case of black */
502  ctx->internal->execute(ctx, s->filter_slice_luma, frame, NULL,
503  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
504 
505  if (frame->data[1] && frame->data[2] && !s->is_rgb) {
506  /* chroma planes */
507  ctx->internal->execute(ctx, s->filter_slice_chroma, frame, NULL,
508  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
509  }
510  }
511  }
512 
513  return ff_filter_frame(inlink->dst->outputs[0], frame);
514 }
515 
516 
517 #define OFFSET(x) offsetof(FadeContext, x)
518 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
519 
520 static const AVOption fade_options[] = {
521  { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
522  { "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
523  { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .flags = FLAGS, .unit = "type" },
524  { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .unit = "type" },
525  { "start_frame", "Number of the first frame to which to apply the effect.",
526  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
527  { "s", "Number of the first frame to which to apply the effect.",
528  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
529  { "nb_frames", "Number of frames to which the effect should be applied.",
530  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
531  { "n", "Number of frames to which the effect should be applied.",
532  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, INT_MAX, FLAGS },
533  { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, FLAGS },
534  { "start_time", "Number of seconds of the beginning of the effect.",
535  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
536  { "st", "Number of seconds of the beginning of the effect.",
537  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
538  { "duration", "Duration of the effect in seconds.",
539  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
540  { "d", "Duration of the effect in seconds.",
541  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
542  { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
543  { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
544  { NULL }
545 };
546 
548 
550  {
551  .name = "default",
552  .type = AVMEDIA_TYPE_VIDEO,
553  .config_props = config_props,
554  .filter_frame = filter_frame,
555  .needs_writable = 1,
556  },
557  { NULL }
558 };
559 
561  {
562  .name = "default",
563  .type = AVMEDIA_TYPE_VIDEO,
564  },
565  { NULL }
566 };
567 
569  .name = "fade",
570  .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
571  .init = init,
572  .priv_size = sizeof(FadeContext),
573  .priv_class = &fade_class,
575  .inputs = avfilter_vf_fade_inputs,
576  .outputs = avfilter_vf_fade_outputs,
578 };
#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:308
static const AVFilterPad avfilter_vf_fade_outputs[]
Definition: vf_fade.c:560
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
static int config_props(AVFilterLink *inlink)
Definition: vf_fade.c:406
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:520
static int filter_slice_chroma16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:330
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:283
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:177
AVOptions.
#define FLAGS
Definition: vf_fade.c:518
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:401
#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:67
#define height
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
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:254
#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:185
A filter pad used for either input or output.
Definition: internal.h:54
static int query_formats(AVFilterContext *ctx)
Definition: vf_fade.c:103
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
int width
Definition: frame.h:366
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:600
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
enum FadeContext::@224 fade_state
#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:488
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fade.c:73
int(* filter_slice_chroma)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:69
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:353
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:116
#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:439
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:233
#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:278
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:549
#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:381
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:70
AVFilter ff_vf_fade
Definition: vf_fade.c:568
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
misc drawing utilities
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
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
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:144
const char * name
Filter name.
Definition: avfilter.h:148
#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:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:270
#define FADE_IN
Definition: vf_fade.c:49
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define flags(name, subs,...)
Definition: cbs_av1.c:560
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
#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:322
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:66
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:517
avfilter_execute_func * execute
Definition: internal.h:144
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2039
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:210
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:64
An instance of a filter.
Definition: avfilter.h:338
uint8_t rgba_map[4]
Definition: vf_fade.c:61
int height
Definition: frame.h:366
#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:169
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
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
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:68
simple arithmetic expression evaluator
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
AVFILTER_DEFINE_CLASS(fade)