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avfilter.c
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1 /*
2  * filter layer
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 #include "libavutil/atomic.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
26 #include "libavutil/common.h"
27 #include "libavutil/eval.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/rational.h"
33 #include "libavutil/samplefmt.h"
34 
35 #include "audio.h"
36 #include "avfilter.h"
37 #include "formats.h"
38 #include "internal.h"
39 
40 #include "libavutil/ffversion.h"
41 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
42 
44 
45 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
46 {
47  av_unused char buf[16];
48  ff_tlog(ctx,
49  "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
50  ref, ref->buf, ref->data[0],
51  ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
52  ref->pts, av_frame_get_pkt_pos(ref));
53 
54  if (ref->width) {
55  ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
57  ref->width, ref->height,
58  !ref->interlaced_frame ? 'P' : /* Progressive */
59  ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
60  ref->key_frame,
62  }
63  if (ref->nb_samples) {
64  ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
65  ref->channel_layout,
66  ref->nb_samples,
67  ref->sample_rate);
68  }
69 
70  ff_tlog(ctx, "]%s", end ? "\n" : "");
71 }
72 
73 unsigned avfilter_version(void)
74 {
77 }
78 
79 const char *avfilter_configuration(void)
80 {
81  return FFMPEG_CONFIGURATION;
82 }
83 
84 const char *avfilter_license(void)
85 {
86 #define LICENSE_PREFIX "libavfilter license: "
87  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
88 }
89 
91 {
93  av_freep(&c->arg);
94  av_freep(&c->command);
95  filter->command_queue= c->next;
96  av_free(c);
97 }
98 
99 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
100  AVFilterPad **pads, AVFilterLink ***links,
101  AVFilterPad *newpad)
102 {
103  AVFilterLink **newlinks;
104  AVFilterPad *newpads;
105  unsigned i;
106 
107  idx = FFMIN(idx, *count);
108 
109  newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
110  newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
111  if (newpads)
112  *pads = newpads;
113  if (newlinks)
114  *links = newlinks;
115  if (!newpads || !newlinks)
116  return AVERROR(ENOMEM);
117 
118  memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
119  memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
120  memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
121  (*links)[idx] = NULL;
122 
123  (*count)++;
124  for (i = idx + 1; i < *count; i++)
125  if ((*links)[i])
126  (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
127 
128  return 0;
129 }
130 
131 int avfilter_link(AVFilterContext *src, unsigned srcpad,
132  AVFilterContext *dst, unsigned dstpad)
133 {
134  AVFilterLink *link;
135 
136  if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
137  src->outputs[srcpad] || dst->inputs[dstpad])
138  return AVERROR(EINVAL);
139 
140  if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
141  av_log(src, AV_LOG_ERROR,
142  "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
143  src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
144  dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
145  return AVERROR(EINVAL);
146  }
147 
148  link = av_mallocz(sizeof(*link));
149  if (!link)
150  return AVERROR(ENOMEM);
151 
152  src->outputs[srcpad] = dst->inputs[dstpad] = link;
153 
154  link->src = src;
155  link->dst = dst;
156  link->srcpad = &src->output_pads[srcpad];
157  link->dstpad = &dst->input_pads[dstpad];
158  link->type = src->output_pads[srcpad].type;
160  link->format = -1;
161 
162  return 0;
163 }
164 
166 {
167  if (!*link)
168  return;
169 
170  av_frame_free(&(*link)->partial_buf);
171  ff_video_frame_pool_uninit((FFVideoFramePool**)&(*link)->video_frame_pool);
172 
173  av_freep(link);
174 }
175 
177 {
178  return link->channels;
179 }
180 
181 void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
182 {
183  ff_avfilter_link_set_out_status(link, status, pts);
184 }
185 
186 void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
187 {
188  link->status = status;
189  link->frame_wanted_in = link->frame_wanted_out = 0;
190  ff_update_link_current_pts(link, pts);
191 }
192 
193 void avfilter_link_set_closed(AVFilterLink *link, int closed)
194 {
196 }
197 
199  unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
200 {
201  int ret;
202  unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
203 
204  av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
205  "between the filter '%s' and the filter '%s'\n",
206  filt->name, link->src->name, link->dst->name);
207 
208  link->dst->inputs[dstpad_idx] = NULL;
209  if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
210  /* failed to link output filter to new filter */
211  link->dst->inputs[dstpad_idx] = link;
212  return ret;
213  }
214 
215  /* re-hookup the link to the new destination filter we inserted */
216  link->dst = filt;
217  link->dstpad = &filt->input_pads[filt_srcpad_idx];
218  filt->inputs[filt_srcpad_idx] = link;
219 
220  /* if any information on supported media formats already exists on the
221  * link, we need to preserve that */
222  if (link->out_formats)
224  &filt->outputs[filt_dstpad_idx]->out_formats);
225  if (link->out_samplerates)
227  &filt->outputs[filt_dstpad_idx]->out_samplerates);
228  if (link->out_channel_layouts)
230  &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
231 
232  return 0;
233 }
234 
236 {
237  int (*config_link)(AVFilterLink *);
238  unsigned i;
239  int ret;
240 
241  for (i = 0; i < filter->nb_inputs; i ++) {
242  AVFilterLink *link = filter->inputs[i];
243  AVFilterLink *inlink;
244 
245  if (!link) continue;
246  if (!link->src || !link->dst) {
247  av_log(filter, AV_LOG_ERROR,
248  "Not all input and output are properly linked (%d).\n", i);
249  return AVERROR(EINVAL);
250  }
251 
252  inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
253  link->current_pts =
255 
256  switch (link->init_state) {
257  case AVLINK_INIT:
258  continue;
259  case AVLINK_STARTINIT:
260  av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
261  return 0;
262  case AVLINK_UNINIT:
263  link->init_state = AVLINK_STARTINIT;
264 
265  if ((ret = avfilter_config_links(link->src)) < 0)
266  return ret;
267 
268  if (!(config_link = link->srcpad->config_props)) {
269  if (link->src->nb_inputs != 1) {
270  av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
271  "with more than one input "
272  "must set config_props() "
273  "callbacks on all outputs\n");
274  return AVERROR(EINVAL);
275  }
276  } else if ((ret = config_link(link)) < 0) {
277  av_log(link->src, AV_LOG_ERROR,
278  "Failed to configure output pad on %s\n",
279  link->src->name);
280  return ret;
281  }
282 
283  switch (link->type) {
284  case AVMEDIA_TYPE_VIDEO:
285  if (!link->time_base.num && !link->time_base.den)
286  link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
287 
288  if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
289  link->sample_aspect_ratio = inlink ?
290  inlink->sample_aspect_ratio : (AVRational){1,1};
291 
292  if (inlink) {
293  if (!link->frame_rate.num && !link->frame_rate.den)
294  link->frame_rate = inlink->frame_rate;
295  if (!link->w)
296  link->w = inlink->w;
297  if (!link->h)
298  link->h = inlink->h;
299  } else if (!link->w || !link->h) {
300  av_log(link->src, AV_LOG_ERROR,
301  "Video source filters must set their output link's "
302  "width and height\n");
303  return AVERROR(EINVAL);
304  }
305  break;
306 
307  case AVMEDIA_TYPE_AUDIO:
308  if (inlink) {
309  if (!link->time_base.num && !link->time_base.den)
310  link->time_base = inlink->time_base;
311  }
312 
313  if (!link->time_base.num && !link->time_base.den)
314  link->time_base = (AVRational) {1, link->sample_rate};
315  }
316 
317  if ((config_link = link->dstpad->config_props))
318  if ((ret = config_link(link)) < 0) {
319  av_log(link->dst, AV_LOG_ERROR,
320  "Failed to configure input pad on %s\n",
321  link->dst->name);
322  return ret;
323  }
324 
325  link->init_state = AVLINK_INIT;
326  }
327  }
328 
329  return 0;
330 }
331 
332 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
333 {
334  if (link->type == AVMEDIA_TYPE_VIDEO) {
335  ff_tlog(ctx,
336  "link[%p s:%dx%d fmt:%s %s->%s]%s",
337  link, link->w, link->h,
339  link->src ? link->src->filter->name : "",
340  link->dst ? link->dst->filter->name : "",
341  end ? "\n" : "");
342  } else {
343  char buf[128];
344  av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
345 
346  ff_tlog(ctx,
347  "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
348  link, (int)link->sample_rate, buf,
350  link->src ? link->src->filter->name : "",
351  link->dst ? link->dst->filter->name : "",
352  end ? "\n" : "");
353  }
354 }
355 
357 {
359 
360  if (link->status)
361  return link->status;
362  link->frame_wanted_in = 1;
363  link->frame_wanted_out = 1;
364  return 0;
365 }
366 
368 {
369  int ret = -1;
370 
371  FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
372  link->frame_wanted_in = 0;
373  if (link->srcpad->request_frame)
374  ret = link->srcpad->request_frame(link);
375  else if (link->src->inputs[0])
376  ret = ff_request_frame(link->src->inputs[0]);
377  if (ret == AVERROR_EOF && link->partial_buf) {
378  AVFrame *pbuf = link->partial_buf;
379  link->partial_buf = NULL;
380  ret = ff_filter_frame_framed(link, pbuf);
382  link->frame_wanted_out = 0;
383  return ret;
384  }
385  if (ret < 0) {
386  if (ret != AVERROR(EAGAIN) && ret != link->status)
388  }
389  return ret;
390 }
391 
393 {
394  int i, min = INT_MAX;
395 
396  if (link->srcpad->poll_frame)
397  return link->srcpad->poll_frame(link);
398 
399  for (i = 0; i < link->src->nb_inputs; i++) {
400  int val;
401  if (!link->src->inputs[i])
402  return AVERROR(EINVAL);
403  val = ff_poll_frame(link->src->inputs[i]);
404  min = FFMIN(min, val);
405  }
406 
407  return min;
408 }
409 
410 static const char *const var_names[] = {
411  "t",
412  "n",
413  "pos",
414  "w",
415  "h",
416  NULL
417 };
418 
419 enum {
426 };
427 
428 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
429 {
430  int ret;
431  char *expr_dup;
432  AVExpr *old = ctx->enable;
433 
435  av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
436  "with filter '%s'\n", ctx->filter->name);
437  return AVERROR_PATCHWELCOME;
438  }
439 
440  expr_dup = av_strdup(expr);
441  if (!expr_dup)
442  return AVERROR(ENOMEM);
443 
444  if (!ctx->var_values) {
445  ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
446  if (!ctx->var_values) {
447  av_free(expr_dup);
448  return AVERROR(ENOMEM);
449  }
450  }
451 
452  ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
453  NULL, NULL, NULL, NULL, 0, ctx->priv);
454  if (ret < 0) {
455  av_log(ctx->priv, AV_LOG_ERROR,
456  "Error when evaluating the expression '%s' for enable\n",
457  expr_dup);
458  av_free(expr_dup);
459  return ret;
460  }
461 
462  av_expr_free(old);
463  av_free(ctx->enable_str);
464  ctx->enable_str = expr_dup;
465  return 0;
466 }
467 
469 {
470  if (pts == AV_NOPTS_VALUE)
471  return;
472  link->current_pts = pts;
474  /* TODO use duration */
475  if (link->graph && link->age_index >= 0)
477 }
478 
479 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
480 {
481  if(!strcmp(cmd, "ping")){
482  char local_res[256] = {0};
483 
484  if (!res) {
485  res = local_res;
486  res_len = sizeof(local_res);
487  }
488  av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
489  if (res == local_res)
490  av_log(filter, AV_LOG_INFO, "%s", res);
491  return 0;
492  }else if(!strcmp(cmd, "enable")) {
493  return set_enable_expr(filter, arg);
494  }else if(filter->filter->process_command) {
495  return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
496  }
497  return AVERROR(ENOSYS);
498 }
499 
502 
503 #if !FF_API_NOCONST_GET_NAME
504 const
505 #endif
507 {
508  const AVFilter *f = NULL;
509 
510  if (!name)
511  return NULL;
512 
513  while ((f = avfilter_next(f)))
514  if (!strcmp(f->name, name))
515  return (AVFilter *)f;
516 
517  return NULL;
518 }
519 
521 {
522  AVFilter **f = last_filter;
523 
524  /* the filter must select generic or internal exclusively */
526 
527  filter->next = NULL;
528 
529  while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
530  f = &(*f)->next;
531  last_filter = &filter->next;
532 
533  return 0;
534 }
535 
536 const AVFilter *avfilter_next(const AVFilter *prev)
537 {
538  return prev ? prev->next : first_filter;
539 }
540 
541 #if FF_API_OLD_FILTER_REGISTER
542 AVFilter **av_filter_next(AVFilter **filter)
543 {
544  return filter ? &(*filter)->next : &first_filter;
545 }
546 
547 void avfilter_uninit(void)
548 {
549 }
550 #endif
551 
553 {
554  int count;
555 
556  if (!pads)
557  return 0;
558 
559  for (count = 0; pads->name; count++)
560  pads++;
561  return count;
562 }
563 
564 static const char *default_filter_name(void *filter_ctx)
565 {
567  return ctx->name ? ctx->name : ctx->filter->name;
568 }
569 
570 static void *filter_child_next(void *obj, void *prev)
571 {
572  AVFilterContext *ctx = obj;
573  if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
574  return ctx->priv;
575  return NULL;
576 }
577 
578 static const AVClass *filter_child_class_next(const AVClass *prev)
579 {
580  const AVFilter *f = NULL;
581 
582  /* find the filter that corresponds to prev */
583  while (prev && (f = avfilter_next(f)))
584  if (f->priv_class == prev)
585  break;
586 
587  /* could not find filter corresponding to prev */
588  if (prev && !f)
589  return NULL;
590 
591  /* find next filter with specific options */
592  while ((f = avfilter_next(f)))
593  if (f->priv_class)
594  return f->priv_class;
595 
596  return NULL;
597 }
598 
599 #define OFFSET(x) offsetof(AVFilterContext, x)
600 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
601 static const AVOption avfilter_options[] = {
602  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
603  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
604  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
605  { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
606  { NULL },
607 };
608 
609 static const AVClass avfilter_class = {
610  .class_name = "AVFilter",
611  .item_name = default_filter_name,
612  .version = LIBAVUTIL_VERSION_INT,
613  .category = AV_CLASS_CATEGORY_FILTER,
614  .child_next = filter_child_next,
615  .child_class_next = filter_child_class_next,
617 };
618 
620  int *ret, int nb_jobs)
621 {
622  int i;
623 
624  for (i = 0; i < nb_jobs; i++) {
625  int r = func(ctx, arg, i, nb_jobs);
626  if (ret)
627  ret[i] = r;
628  }
629  return 0;
630 }
631 
632 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
633 {
634  AVFilterContext *ret;
635 
636  if (!filter)
637  return NULL;
638 
639  ret = av_mallocz(sizeof(AVFilterContext));
640  if (!ret)
641  return NULL;
642 
643  ret->av_class = &avfilter_class;
644  ret->filter = filter;
645  ret->name = inst_name ? av_strdup(inst_name) : NULL;
646  if (filter->priv_size) {
647  ret->priv = av_mallocz(filter->priv_size);
648  if (!ret->priv)
649  goto err;
650  }
651 
652  av_opt_set_defaults(ret);
653  if (filter->priv_class) {
654  *(const AVClass**)ret->priv = filter->priv_class;
656  }
657 
658  ret->internal = av_mallocz(sizeof(*ret->internal));
659  if (!ret->internal)
660  goto err;
662 
663  ret->nb_inputs = avfilter_pad_count(filter->inputs);
664  if (ret->nb_inputs ) {
665  ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
666  if (!ret->input_pads)
667  goto err;
668  memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
669  ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
670  if (!ret->inputs)
671  goto err;
672  }
673 
674  ret->nb_outputs = avfilter_pad_count(filter->outputs);
675  if (ret->nb_outputs) {
676  ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
677  if (!ret->output_pads)
678  goto err;
679  memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
680  ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
681  if (!ret->outputs)
682  goto err;
683  }
684 
685  return ret;
686 
687 err:
688  av_freep(&ret->inputs);
689  av_freep(&ret->input_pads);
690  ret->nb_inputs = 0;
691  av_freep(&ret->outputs);
692  av_freep(&ret->output_pads);
693  ret->nb_outputs = 0;
694  av_freep(&ret->priv);
695  av_freep(&ret->internal);
696  av_free(ret);
697  return NULL;
698 }
699 
700 #if FF_API_AVFILTER_OPEN
701 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
702 {
703  *filter_ctx = ff_filter_alloc(filter, inst_name);
704  return *filter_ctx ? 0 : AVERROR(ENOMEM);
705 }
706 #endif
707 
708 static void free_link(AVFilterLink *link)
709 {
710  if (!link)
711  return;
712 
713  if (link->src)
714  link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
715  if (link->dst)
716  link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
717 
724  avfilter_link_free(&link);
725 }
726 
728 {
729  int i;
730 
731  if (!filter)
732  return;
733 
734  if (filter->graph)
735  ff_filter_graph_remove_filter(filter->graph, filter);
736 
737  if (filter->filter->uninit)
738  filter->filter->uninit(filter);
739 
740  for (i = 0; i < filter->nb_inputs; i++) {
741  free_link(filter->inputs[i]);
742  }
743  for (i = 0; i < filter->nb_outputs; i++) {
744  free_link(filter->outputs[i]);
745  }
746 
747  if (filter->filter->priv_class)
748  av_opt_free(filter->priv);
749 
750  av_freep(&filter->name);
751  av_freep(&filter->input_pads);
752  av_freep(&filter->output_pads);
753  av_freep(&filter->inputs);
754  av_freep(&filter->outputs);
755  av_freep(&filter->priv);
756  while(filter->command_queue){
757  ff_command_queue_pop(filter);
758  }
759  av_opt_free(filter);
760  av_expr_free(filter->enable);
761  filter->enable = NULL;
762  av_freep(&filter->var_values);
763  av_freep(&filter->internal);
764  av_free(filter);
765 }
766 
768  const char *args)
769 {
770  const AVOption *o = NULL;
771  int ret, count = 0;
772  char *av_uninit(parsed_key), *av_uninit(value);
773  const char *key;
774  int offset= -1;
775 
776  if (!args)
777  return 0;
778 
779  while (*args) {
780  const char *shorthand = NULL;
781 
782  o = av_opt_next(ctx->priv, o);
783  if (o) {
784  if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
785  continue;
786  offset = o->offset;
787  shorthand = o->name;
788  }
789 
790  ret = av_opt_get_key_value(&args, "=", ":",
791  shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
792  &parsed_key, &value);
793  if (ret < 0) {
794  if (ret == AVERROR(EINVAL))
795  av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
796  else
797  av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
798  av_err2str(ret));
799  return ret;
800  }
801  if (*args)
802  args++;
803  if (parsed_key) {
804  key = parsed_key;
805  while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
806  } else {
807  key = shorthand;
808  }
809 
810  av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
811 
812  if (av_opt_find(ctx, key, NULL, 0, 0)) {
813  ret = av_opt_set(ctx, key, value, 0);
814  if (ret < 0) {
815  av_free(value);
816  av_free(parsed_key);
817  return ret;
818  }
819  } else {
820  av_dict_set(options, key, value, 0);
821  if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
823  if (ret == AVERROR_OPTION_NOT_FOUND)
824  av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
825  av_free(value);
826  av_free(parsed_key);
827  return ret;
828  }
829  }
830  }
831 
832  av_free(value);
833  av_free(parsed_key);
834  count++;
835  }
836 
837  if (ctx->enable_str) {
838  ret = set_enable_expr(ctx, ctx->enable_str);
839  if (ret < 0)
840  return ret;
841  }
842  return count;
843 }
844 
845 #if FF_API_AVFILTER_INIT_FILTER
846 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
847 {
848  return avfilter_init_str(filter, args);
849 }
850 #endif
851 
853 {
854  int ret = 0;
855 
856  ret = av_opt_set_dict(ctx, options);
857  if (ret < 0) {
858  av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
859  return ret;
860  }
861 
864  ctx->graph->internal->thread_execute) {
867  } else {
868  ctx->thread_type = 0;
869  }
870 
871  if (ctx->filter->priv_class) {
872  ret = av_opt_set_dict(ctx->priv, options);
873  if (ret < 0) {
874  av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
875  return ret;
876  }
877  }
878 
879  if (ctx->filter->init_opaque)
880  ret = ctx->filter->init_opaque(ctx, NULL);
881  else if (ctx->filter->init)
882  ret = ctx->filter->init(ctx);
883  else if (ctx->filter->init_dict)
884  ret = ctx->filter->init_dict(ctx, options);
885 
886  return ret;
887 }
888 
890 {
893  int ret = 0;
894 
895  if (args && *args) {
896  if (!filter->filter->priv_class) {
897  av_log(filter, AV_LOG_ERROR, "This filter does not take any "
898  "options, but options were provided: %s.\n", args);
899  return AVERROR(EINVAL);
900  }
901 
902 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
903  if ( !strcmp(filter->filter->name, "format") ||
904  !strcmp(filter->filter->name, "noformat") ||
905  !strcmp(filter->filter->name, "frei0r") ||
906  !strcmp(filter->filter->name, "frei0r_src") ||
907  !strcmp(filter->filter->name, "ocv") ||
908  !strcmp(filter->filter->name, "pan") ||
909  !strcmp(filter->filter->name, "pp") ||
910  !strcmp(filter->filter->name, "aevalsrc")) {
911  /* a hack for compatibility with the old syntax
912  * replace colons with |s */
913  char *copy = av_strdup(args);
914  char *p = copy;
915  int nb_leading = 0; // number of leading colons to skip
916  int deprecated = 0;
917 
918  if (!copy) {
919  ret = AVERROR(ENOMEM);
920  goto fail;
921  }
922 
923  if (!strcmp(filter->filter->name, "frei0r") ||
924  !strcmp(filter->filter->name, "ocv"))
925  nb_leading = 1;
926  else if (!strcmp(filter->filter->name, "frei0r_src"))
927  nb_leading = 3;
928 
929  while (nb_leading--) {
930  p = strchr(p, ':');
931  if (!p) {
932  p = copy + strlen(copy);
933  break;
934  }
935  p++;
936  }
937 
938  deprecated = strchr(p, ':') != NULL;
939 
940  if (!strcmp(filter->filter->name, "aevalsrc")) {
941  deprecated = 0;
942  while ((p = strchr(p, ':')) && p[1] != ':') {
943  const char *epos = strchr(p + 1, '=');
944  const char *spos = strchr(p + 1, ':');
945  const int next_token_is_opt = epos && (!spos || epos < spos);
946  if (next_token_is_opt) {
947  p++;
948  break;
949  }
950  /* next token does not contain a '=', assume a channel expression */
951  deprecated = 1;
952  *p++ = '|';
953  }
954  if (p && *p == ':') { // double sep '::' found
955  deprecated = 1;
956  memmove(p, p + 1, strlen(p));
957  }
958  } else
959  while ((p = strchr(p, ':')))
960  *p++ = '|';
961 
962 #if FF_API_OLD_FILTER_OPTS
963  if (deprecated)
964  av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
965  "'|' to separate the list items.\n");
966 
967  av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
968  ret = process_options(filter, &options, copy);
969 #else
970  if (deprecated) {
971  av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
972  "'|' to separate the list items ('%s' instead of '%s')\n",
973  copy, args);
974  ret = AVERROR(EINVAL);
975  } else {
976  ret = process_options(filter, &options, copy);
977  }
978 #endif
979  av_freep(&copy);
980 
981  if (ret < 0)
982  goto fail;
983  } else
984 #endif
985  {
986  ret = process_options(filter, &options, args);
987  if (ret < 0)
988  goto fail;
989  }
990  }
991 
992  ret = avfilter_init_dict(filter, &options);
993  if (ret < 0)
994  goto fail;
995 
996  if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
997  av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
999  goto fail;
1000  }
1001 
1002 fail:
1003  av_dict_free(&options);
1004 
1005  return ret;
1006 }
1007 
1008 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
1009 {
1010  return pads[pad_idx].name;
1011 }
1012 
1013 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
1014 {
1015  return pads[pad_idx].type;
1016 }
1017 
1019 {
1020  return ff_filter_frame(link->dst->outputs[0], frame);
1021 }
1022 
1024 {
1025  int (*filter_frame)(AVFilterLink *, AVFrame *);
1026  AVFilterContext *dstctx = link->dst;
1027  AVFilterPad *dst = link->dstpad;
1028  AVFrame *out = NULL;
1029  int ret;
1030  AVFilterCommand *cmd= link->dst->command_queue;
1031  int64_t pts;
1032 
1033  if (link->status) {
1034  av_frame_free(&frame);
1035  return link->status;
1036  }
1037 
1038  if (!(filter_frame = dst->filter_frame))
1040 
1041  /* copy the frame if needed */
1042  if (dst->needs_writable && !av_frame_is_writable(frame)) {
1043  av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1044 
1045  switch (link->type) {
1046  case AVMEDIA_TYPE_VIDEO:
1047  out = ff_get_video_buffer(link, link->w, link->h);
1048  break;
1049  case AVMEDIA_TYPE_AUDIO:
1050  out = ff_get_audio_buffer(link, frame->nb_samples);
1051  break;
1052  default:
1053  ret = AVERROR(EINVAL);
1054  goto fail;
1055  }
1056  if (!out) {
1057  ret = AVERROR(ENOMEM);
1058  goto fail;
1059  }
1060 
1061  ret = av_frame_copy_props(out, frame);
1062  if (ret < 0)
1063  goto fail;
1064 
1065  switch (link->type) {
1066  case AVMEDIA_TYPE_VIDEO:
1067  av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1068  frame->format, frame->width, frame->height);
1069  break;
1070  case AVMEDIA_TYPE_AUDIO:
1072  0, 0, frame->nb_samples,
1074  frame->format);
1075  break;
1076  default:
1077  ret = AVERROR(EINVAL);
1078  goto fail;
1079  }
1080 
1081  av_frame_free(&frame);
1082  } else
1083  out = frame;
1084 
1085  while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1086  av_log(link->dst, AV_LOG_DEBUG,
1087  "Processing command time:%f command:%s arg:%s\n",
1088  cmd->time, cmd->command, cmd->arg);
1089  avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1090  ff_command_queue_pop(link->dst);
1091  cmd= link->dst->command_queue;
1092  }
1093 
1094  pts = out->pts;
1095  if (dstctx->enable_str) {
1096  int64_t pos = av_frame_get_pkt_pos(out);
1097  dstctx->var_values[VAR_N] = link->frame_count;
1098  dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1099  dstctx->var_values[VAR_W] = link->w;
1100  dstctx->var_values[VAR_H] = link->h;
1101  dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1102 
1103  dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1104  if (dstctx->is_disabled &&
1107  }
1108  ret = filter_frame(link, out);
1109  link->frame_count++;
1110  ff_update_link_current_pts(link, pts);
1111  return ret;
1112 
1113 fail:
1114  av_frame_free(&out);
1115  av_frame_free(&frame);
1116  return ret;
1117 }
1118 
1120 {
1121  int insamples = frame->nb_samples, inpos = 0, nb_samples;
1122  AVFrame *pbuf = link->partial_buf;
1123  int nb_channels = av_frame_get_channels(frame);
1124  int ret = 0;
1125 
1126  /* Handle framing (min_samples, max_samples) */
1127  while (insamples) {
1128  if (!pbuf) {
1129  AVRational samples_tb = { 1, link->sample_rate };
1130  pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1131  if (!pbuf) {
1132  av_log(link->dst, AV_LOG_WARNING,
1133  "Samples dropped due to memory allocation failure.\n");
1134  return 0;
1135  }
1136  av_frame_copy_props(pbuf, frame);
1137  pbuf->pts = frame->pts;
1138  if (pbuf->pts != AV_NOPTS_VALUE)
1139  pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1140  pbuf->nb_samples = 0;
1141  }
1142  nb_samples = FFMIN(insamples,
1143  link->partial_buf_size - pbuf->nb_samples);
1145  pbuf->nb_samples, inpos,
1146  nb_samples, nb_channels, link->format);
1147  inpos += nb_samples;
1148  insamples -= nb_samples;
1149  pbuf->nb_samples += nb_samples;
1150  if (pbuf->nb_samples >= link->min_samples) {
1151  ret = ff_filter_frame_framed(link, pbuf);
1152  pbuf = NULL;
1153  } else {
1154  if (link->frame_wanted_out)
1155  link->frame_wanted_in = 1;
1156  }
1157  }
1158  av_frame_free(&frame);
1159  link->partial_buf = pbuf;
1160  return ret;
1161 }
1162 
1164 {
1166 
1167  /* Consistency checks */
1168  if (link->type == AVMEDIA_TYPE_VIDEO) {
1169  if (strcmp(link->dst->filter->name, "buffersink") &&
1170  strcmp(link->dst->filter->name, "format") &&
1171  strcmp(link->dst->filter->name, "idet") &&
1172  strcmp(link->dst->filter->name, "null") &&
1173  strcmp(link->dst->filter->name, "scale")) {
1174  av_assert1(frame->format == link->format);
1175  av_assert1(frame->width == link->w);
1176  av_assert1(frame->height == link->h);
1177  }
1178  } else {
1179  if (frame->format != link->format) {
1180  av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1181  goto error;
1182  }
1183  if (av_frame_get_channels(frame) != link->channels) {
1184  av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1185  goto error;
1186  }
1187  if (frame->channel_layout != link->channel_layout) {
1188  av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1189  goto error;
1190  }
1191  if (frame->sample_rate != link->sample_rate) {
1192  av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1193  goto error;
1194  }
1195  }
1196 
1197  link->frame_wanted_out = 0;
1198  /* Go directly to actual filtering if possible */
1199  if (link->type == AVMEDIA_TYPE_AUDIO &&
1200  link->min_samples &&
1201  (link->partial_buf ||
1202  frame->nb_samples < link->min_samples ||
1203  frame->nb_samples > link->max_samples)) {
1204  return ff_filter_frame_needs_framing(link, frame);
1205  } else {
1206  return ff_filter_frame_framed(link, frame);
1207  }
1208 error:
1209  av_frame_free(&frame);
1210  return AVERROR_PATCHWELCOME;
1211 }
1212 
1214 {
1215  return &avfilter_class;
1216 }
int(* poll_frame)(AVFilterLink *link)
Frame poll callback.
Definition: internal.h:103
double * var_values
variable values for the enable expression
Definition: avfilter.h:350
#define ff_tlog(ctx,...)
Definition: internal.h:65
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
Definition: avfilter.c:45
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:632
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:781
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1018
AVOption.
Definition: opt.h:245
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:727
AVFormatContext * ctx
Definition: movenc-test.c:48
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
void ff_video_frame_pool_uninit(FFVideoFramePool **pool)
Deallocate the video frame pool.
Definition: framepool.c:177
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:357
int(* init)(AVFilterContext *ctx)
Filter initialization function.
Definition: avfilter.h:215
void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref)
Definition: formats.c:499
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1196
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1013
int num
numerator
Definition: rational.h:44
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:64
#define LIBAVFILTER_VERSION_INT
Definition: version.h:36
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:657
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
int thread_type
Type of multithreading being allowed/used.
Definition: avfilter.h:339
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:351
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:299
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:321
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:122
const char * name
Pad name.
Definition: internal.h:59
int priv_size
size of private data to allocate for the filter
Definition: avfilter.h:266
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:312
char * name
name of this filter instance
Definition: avfilter.h:309
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:501
const char * name
Definition: opt.h:246
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1163
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:131
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:315
const char * avfilter_license(void)
Return the libavfilter license.
Definition: avfilter.c:84
uint8_t
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:112
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
const struct AVOption * option
a pointer to the first option specified in the class if any or NULL
Definition: log.h:85
Accept to parse a value without a key; the key will then be returned as NULL.
Definition: opt.h:529
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:262
Definition: eval.c:148
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:82
Video frame pool.
Definition: framepool.c:29
int flags
A combination of AVFILTER_FLAG_*.
Definition: avfilter.h:184
void ff_command_queue_pop(AVFilterContext *filter)
Definition: avfilter.c:90
static AVFrame * frame
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:235
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
Definition: utils.c:91
const AVFilter * avfilter_next(const AVFilter *prev)
Iterate over all registered filters.
Definition: avfilter.c:536
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:312
void(* uninit)(AVFilterContext *ctx)
Filter uninitialization function.
Definition: avfilter.h:240
static void copy(LZOContext *c, int cnt)
Copies bytes from input to output buffer with checking.
Definition: lzo.c:85
static void free_link(AVFilterLink *link)
Definition: avfilter.c:708
int(* process_command)(AVFilterContext *, const char *cmd, const char *arg, char *res, int res_len, int flags)
Make the filter instance process a command.
Definition: avfilter.h:286
const OptionDef options[]
Definition: ffserver.c:3962
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:53
void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
Definition: avfilter.c:468
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:300
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 const AVClass avfilter_class
Definition: avfilter.c:609
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:311
int width
width and height of the video frame
Definition: frame.h:230
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
Before After |formats |<------—.
Definition: formats.c:505
#define avpriv_atomic_ptr_cas
Definition: atomic_gcc.h:60
int( avfilter_action_func)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
A function pointer passed to the AVFilterGraph::execute callback to be executed multiple times...
Definition: avfilter.h:744
static const char * default_filter_name(void *filter_ctx)
Definition: avfilter.c:564
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:65
#define AVERROR(e)
Definition: error.h:43
int avfilter_link_get_channels(AVFilterLink *link)
Get the number of channels of a link.
Definition: avfilter.c:176
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
unsigned nb_outputs
number of output pads
Definition: avfilter.h:317
unsigned avfilter_version(void)
Return the LIBAVFILTER_VERSION_INT constant.
Definition: avfilter.c:73
const char * r
Definition: vf_curves.c:107
void * priv
private data for use by the filter
Definition: avfilter.h:319
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:113
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int(* filter_frame)(AVFilterLink *link, AVFrame *frame)
Filtering callback.
Definition: internal.h:92
char * enable_str
enable expression string
Definition: avfilter.h:348
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
const char * arg
Definition: jacosubdec.c:66
int(* init_dict)(AVFilterContext *ctx, AVDictionary **options)
Should be set instead of init by the filters that want to pass a dictionary of AVOptions to nested co...
Definition: avfilter.h:228
simple assert() macros that are a bit more flexible than ISO C assert().
#define FF_TPRINTF_START(ctx, func)
Definition: internal.h:256
const AVOption * av_opt_next(const void *obj, const AVOption *last)
Iterate over all AVOptions belonging to obj.
Definition: opt.c:45
static FilteringContext * filter_ctx
Definition: transcoding.c:46
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:47
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
#define fail()
Definition: checkasm.h:80
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:302
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:343
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:506
const AVOption * av_opt_find(void *obj, const char *name, const char *unit, int opt_flags, int search_flags)
Look for an option in an object.
Definition: opt.c:1497
common internal API header
static void * filter_child_next(void *obj, void *prev)
Definition: avfilter.c:570
void avfilter_link_set_closed(AVFilterLink *link, int closed)
Set the closed field of a link.
Definition: avfilter.c:193
audio channel layout utility functions
static int request_frame(AVFilterLink *outlink)
Definition: aeval.c:274
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:252
unsigned nb_inputs
number of input pads
Definition: avfilter.h:313
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define FFMIN(a, b)
Definition: common.h:96
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
static AVFilter * first_filter
Definition: avfilter.c:500
struct AVFilterCommand * next
Definition: internal.h:42
static const AVOption avfilter_options[]
Definition: avfilter.c:601
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: aeval.c:413
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the destination filter.
Definition: avfilter.c:186
int needs_writable
The filter expects writable frames from its input link, duplicating data buffers if needed...
Definition: internal.h:144
static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1119
int(* init_opaque)(AVFilterContext *ctx, void *opaque)
Filter initialization function, alternative to the init() callback.
Definition: avfilter.h:293
#define src
Definition: vp9dsp.c:530
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:889
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:161
FILE * out
Definition: movenc-test.c:54
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
const AVClass * avfilter_get_class(void)
Definition: avfilter.c:1213
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt, unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
Insert a filter in the middle of an existing link.
Definition: avfilter.c:198
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:242
const AVClass * priv_class
A class for the private data, used to declare filter private AVOptions.
Definition: avfilter.h:179
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int offset
The offset relative to the context structure where the option value is stored.
Definition: opt.h:258
void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
Definition: avfilter.c:332
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:317
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:252
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:793
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:505
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1492
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
int ff_request_frame_to_filter(AVFilterLink *link)
Definition: avfilter.c:367
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:257
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link)
Update the position of a link in the age heap.
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:481
int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
Make the filter instance process a command.
Definition: avfilter.c:479
int av_samples_copy(uint8_t **dst, uint8_t *const *src, int dst_offset, int src_offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Copy samples from src to dst.
Definition: samplefmt.c:211
void * buf
Definition: avisynth_c.h:553
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
const char av_filter_ffversion[]
Definition: avfilter.c:41
Describe the class of an AVClass context structure.
Definition: log.h:67
int sample_rate
Sample rate of the audio data.
Definition: frame.h:338
int av_frame_get_channels(const AVFrame *frame)
Filter definition.
Definition: avfilter.h:141
static const char *const var_names[]
Definition: avfilter.c:410
rational number numerator/denominator
Definition: rational.h:43
struct AVFilter * next
Used by the filter registration system.
Definition: avfilter.h:272
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:67
AVMediaType
Definition: avutil.h:191
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:476
const char * name
Filter name.
Definition: avfilter.h:145
const char * avfilter_configuration(void)
Return the libavfilter build-time configuration.
Definition: avfilter.c:79
const char * avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
Get the name of an AVFilterPad.
Definition: avfilter.c:1008
#define FLAGS
Definition: avfilter.c:600
#define LICENSE_PREFIX
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:316
#define OFFSET(x)
Definition: avfilter.c:599
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
static int64_t pts
Global timestamp for the audio frames.
static const int8_t filt[NUMTAPS]
Definition: af_earwax.c:39
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:344
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:619
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
Initialize a filter with the supplied dictionary of options.
Definition: avfilter.c:852
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1447
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
Definition: avfilter.c:428
common internal and external API header
rational numbers
#define AVFILTER_FLAG_SUPPORT_TIMELINE
Handy mask to test whether the filter supports or no the timeline feature (internally or generically)...
Definition: avfilter.h:135
static double c[64]
struct AVFilterCommand * command_queue
Definition: avfilter.h:346
#define AV_OPT_SEARCH_FAKE_OBJ
The obj passed to av_opt_find() is fake – only a double pointer to AVClass instead of a required poin...
Definition: opt.h:565
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
char * key
Definition: dict.h:87
int den
denominator
Definition: rational.h:45
avfilter_execute_func * execute
Definition: internal.h:153
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
Definition: avfiltergraph.c:94
avfilter_execute_func * thread_execute
Definition: internal.h:149
#define av_free(p)
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
int avfilter_register(AVFilter *filter)
Register a filter.
Definition: avfilter.c:520
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:317
enum AVOptionType type
Definition: opt.h:259
#define NAN
Definition: math.h:28
int av_opt_get_key_value(const char **ropts, const char *key_val_sep, const char *pairs_sep, unsigned flags, char **rkey, char **rval)
Extract a key-value pair from the beginning of a string.
Definition: opt.c:1373
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:712
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
void * enable
parsed expression (AVExpr*)
Definition: avfilter.h:349
const AVClass * av_class
needed for av_log() and filters common options
Definition: avfilter.h:305
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1023
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:247
void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: avfilter.c:181
An instance of a filter.
Definition: avfilter.h:304
#define av_uninit(x)
Definition: attributes.h:149
int avfilter_pad_count(const AVFilterPad *pads)
Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
Definition: avfilter.c:552
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
int height
Definition: frame.h:230
const AVFilterPad * outputs
List of outputs, terminated by a zeroed element.
Definition: avfilter.h:169
int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off, AVFilterPad **pads, AVFilterLink ***links, AVFilterPad *newpad)
Insert a new pad.
Definition: avfilter.c:99
#define av_freep(p)
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:128
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:72
#define av_malloc_array(a, b)
double time
time expressed in seconds
Definition: internal.h:38
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:356
int nb_channels
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2078
static const AVClass * filter_child_class_next(const AVClass *prev)
Definition: avfilter.c:578
internal API functions
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:225
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:392
float min
void avfilter_link_free(AVFilterLink **link)
Free the link in *link, and set its pointer to NULL.
Definition: avfilter.c:165
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:393
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:235
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:307
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:565
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
char * command
command
Definition: internal.h:39
#define av_unused
Definition: attributes.h:126
static int process_options(AVFilterContext *ctx, AVDictionary **options, const char *args)
Definition: avfilter.c:767
simple arithmetic expression evaluator
const char * name
Definition: opengl_enc.c:103
char * arg
optional argument for the command
Definition: internal.h:40
#define LIBAVFILTER_VERSION_MICRO
Definition: version.h:34