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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 
172  av_freep(link);
173 }
174 
176 {
177  return link->channels;
178 }
179 
180 void avfilter_link_set_closed(AVFilterLink *link, int closed)
181 {
182  link->closed = closed;
183 }
184 
186  unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
187 {
188  int ret;
189  unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
190 
191  av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
192  "between the filter '%s' and the filter '%s'\n",
193  filt->name, link->src->name, link->dst->name);
194 
195  link->dst->inputs[dstpad_idx] = NULL;
196  if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
197  /* failed to link output filter to new filter */
198  link->dst->inputs[dstpad_idx] = link;
199  return ret;
200  }
201 
202  /* re-hookup the link to the new destination filter we inserted */
203  link->dst = filt;
204  link->dstpad = &filt->input_pads[filt_srcpad_idx];
205  filt->inputs[filt_srcpad_idx] = link;
206 
207  /* if any information on supported media formats already exists on the
208  * link, we need to preserve that */
209  if (link->out_formats)
211  &filt->outputs[filt_dstpad_idx]->out_formats);
212  if (link->out_samplerates)
214  &filt->outputs[filt_dstpad_idx]->out_samplerates);
215  if (link->out_channel_layouts)
217  &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
218 
219  return 0;
220 }
221 
223 {
224  int (*config_link)(AVFilterLink *);
225  unsigned i;
226  int ret;
227 
228  for (i = 0; i < filter->nb_inputs; i ++) {
229  AVFilterLink *link = filter->inputs[i];
230  AVFilterLink *inlink;
231 
232  if (!link) continue;
233  if (!link->src || !link->dst) {
234  av_log(filter, AV_LOG_ERROR,
235  "Not all input and output are properly linked (%d).\n", i);
236  return AVERROR(EINVAL);
237  }
238 
239  inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
240  link->current_pts = AV_NOPTS_VALUE;
241 
242  switch (link->init_state) {
243  case AVLINK_INIT:
244  continue;
245  case AVLINK_STARTINIT:
246  av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
247  return 0;
248  case AVLINK_UNINIT:
249  link->init_state = AVLINK_STARTINIT;
250 
251  if ((ret = avfilter_config_links(link->src)) < 0)
252  return ret;
253 
254  if (!(config_link = link->srcpad->config_props)) {
255  if (link->src->nb_inputs != 1) {
256  av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
257  "with more than one input "
258  "must set config_props() "
259  "callbacks on all outputs\n");
260  return AVERROR(EINVAL);
261  }
262  } else if ((ret = config_link(link)) < 0) {
263  av_log(link->src, AV_LOG_ERROR,
264  "Failed to configure output pad on %s\n",
265  link->src->name);
266  return ret;
267  }
268 
269  switch (link->type) {
270  case AVMEDIA_TYPE_VIDEO:
271  if (!link->time_base.num && !link->time_base.den)
272  link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
273 
274  if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
275  link->sample_aspect_ratio = inlink ?
276  inlink->sample_aspect_ratio : (AVRational){1,1};
277 
278  if (inlink && !link->frame_rate.num && !link->frame_rate.den)
279  link->frame_rate = inlink->frame_rate;
280 
281  if (inlink) {
282  if (!link->w)
283  link->w = inlink->w;
284  if (!link->h)
285  link->h = inlink->h;
286  } else if (!link->w || !link->h) {
287  av_log(link->src, AV_LOG_ERROR,
288  "Video source filters must set their output link's "
289  "width and height\n");
290  return AVERROR(EINVAL);
291  }
292  break;
293 
294  case AVMEDIA_TYPE_AUDIO:
295  if (inlink) {
296  if (!link->time_base.num && !link->time_base.den)
297  link->time_base = inlink->time_base;
298  }
299 
300  if (!link->time_base.num && !link->time_base.den)
301  link->time_base = (AVRational) {1, link->sample_rate};
302  }
303 
304  if ((config_link = link->dstpad->config_props))
305  if ((ret = config_link(link)) < 0) {
306  av_log(link->dst, AV_LOG_ERROR,
307  "Failed to configure input pad on %s\n",
308  link->dst->name);
309  return ret;
310  }
311 
312  link->init_state = AVLINK_INIT;
313  }
314  }
315 
316  return 0;
317 }
318 
319 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
320 {
321  if (link->type == AVMEDIA_TYPE_VIDEO) {
322  ff_tlog(ctx,
323  "link[%p s:%dx%d fmt:%s %s->%s]%s",
324  link, link->w, link->h,
326  link->src ? link->src->filter->name : "",
327  link->dst ? link->dst->filter->name : "",
328  end ? "\n" : "");
329  } else {
330  char buf[128];
331  av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
332 
333  ff_tlog(ctx,
334  "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
335  link, (int)link->sample_rate, buf,
337  link->src ? link->src->filter->name : "",
338  link->dst ? link->dst->filter->name : "",
339  end ? "\n" : "");
340  }
341 }
342 
344 {
345  int ret = -1;
347 
348  if (link->closed)
349  return AVERROR_EOF;
350  av_assert0(!link->frame_requested);
351  link->frame_requested = 1;
352  while (link->frame_requested) {
353  if (link->srcpad->request_frame)
354  ret = link->srcpad->request_frame(link);
355  else if (link->src->inputs[0])
356  ret = ff_request_frame(link->src->inputs[0]);
357  if (ret == AVERROR_EOF && link->partial_buf) {
358  AVFrame *pbuf = link->partial_buf;
359  link->partial_buf = NULL;
360  ret = ff_filter_frame_framed(link, pbuf);
361  }
362  if (ret < 0) {
363  link->frame_requested = 0;
364  if (ret == AVERROR_EOF)
365  link->closed = 1;
366  } else {
367  av_assert0(!link->frame_requested ||
369  }
370  }
371  return ret;
372 }
373 
375 {
376  int i, min = INT_MAX;
377 
378  if (link->srcpad->poll_frame)
379  return link->srcpad->poll_frame(link);
380 
381  for (i = 0; i < link->src->nb_inputs; i++) {
382  int val;
383  if (!link->src->inputs[i])
384  return AVERROR(EINVAL);
385  val = ff_poll_frame(link->src->inputs[i]);
386  min = FFMIN(min, val);
387  }
388 
389  return min;
390 }
391 
392 static const char *const var_names[] = {
393  "t",
394  "n",
395  "pos",
396  "w",
397  "h",
398  NULL
399 };
400 
401 enum {
408 };
409 
410 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
411 {
412  int ret;
413  char *expr_dup;
414  AVExpr *old = ctx->enable;
415 
417  av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
418  "with filter '%s'\n", ctx->filter->name);
419  return AVERROR_PATCHWELCOME;
420  }
421 
422  expr_dup = av_strdup(expr);
423  if (!expr_dup)
424  return AVERROR(ENOMEM);
425 
426  if (!ctx->var_values) {
427  ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
428  if (!ctx->var_values) {
429  av_free(expr_dup);
430  return AVERROR(ENOMEM);
431  }
432  }
433 
434  ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
435  NULL, NULL, NULL, NULL, 0, ctx->priv);
436  if (ret < 0) {
437  av_log(ctx->priv, AV_LOG_ERROR,
438  "Error when evaluating the expression '%s' for enable\n",
439  expr_dup);
440  av_free(expr_dup);
441  return ret;
442  }
443 
444  av_expr_free(old);
445  av_free(ctx->enable_str);
446  ctx->enable_str = expr_dup;
447  return 0;
448 }
449 
451 {
452  if (pts == AV_NOPTS_VALUE)
453  return;
454  link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
455  /* TODO use duration */
456  if (link->graph && link->age_index >= 0)
458 }
459 
460 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
461 {
462  if(!strcmp(cmd, "ping")){
463  char local_res[256] = {0};
464 
465  if (!res) {
466  res = local_res;
467  res_len = sizeof(local_res);
468  }
469  av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
470  if (res == local_res)
471  av_log(filter, AV_LOG_INFO, "%s", res);
472  return 0;
473  }else if(!strcmp(cmd, "enable")) {
474  return set_enable_expr(filter, arg);
475  }else if(filter->filter->process_command) {
476  return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
477  }
478  return AVERROR(ENOSYS);
479 }
480 
483 
484 #if !FF_API_NOCONST_GET_NAME
485 const
486 #endif
488 {
489  const AVFilter *f = NULL;
490 
491  if (!name)
492  return NULL;
493 
494  while ((f = avfilter_next(f)))
495  if (!strcmp(f->name, name))
496  return (AVFilter *)f;
497 
498  return NULL;
499 }
500 
502 {
503  AVFilter **f = last_filter;
504  int i;
505 
506  /* the filter must select generic or internal exclusively */
508 
509  for(i=0; filter->inputs && filter->inputs[i].name; i++) {
510  const AVFilterPad *input = &filter->inputs[i];
511  av_assert0( !input->filter_frame
512  || (!input->start_frame && !input->end_frame));
513  }
514 
515  filter->next = NULL;
516 
517  while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
518  f = &(*f)->next;
519  last_filter = &filter->next;
520 
521  return 0;
522 }
523 
524 const AVFilter *avfilter_next(const AVFilter *prev)
525 {
526  return prev ? prev->next : first_filter;
527 }
528 
529 #if FF_API_OLD_FILTER_REGISTER
530 AVFilter **av_filter_next(AVFilter **filter)
531 {
532  return filter ? &(*filter)->next : &first_filter;
533 }
534 
535 void avfilter_uninit(void)
536 {
537 }
538 #endif
539 
541 {
542  int count;
543 
544  if (!pads)
545  return 0;
546 
547  for (count = 0; pads->name; count++)
548  pads++;
549  return count;
550 }
551 
552 static const char *default_filter_name(void *filter_ctx)
553 {
555  return ctx->name ? ctx->name : ctx->filter->name;
556 }
557 
558 static void *filter_child_next(void *obj, void *prev)
559 {
560  AVFilterContext *ctx = obj;
561  if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
562  return ctx->priv;
563  return NULL;
564 }
565 
566 static const AVClass *filter_child_class_next(const AVClass *prev)
567 {
568  const AVFilter *f = NULL;
569 
570  /* find the filter that corresponds to prev */
571  while (prev && (f = avfilter_next(f)))
572  if (f->priv_class == prev)
573  break;
574 
575  /* could not find filter corresponding to prev */
576  if (prev && !f)
577  return NULL;
578 
579  /* find next filter with specific options */
580  while ((f = avfilter_next(f)))
581  if (f->priv_class)
582  return f->priv_class;
583 
584  return NULL;
585 }
586 
587 #define OFFSET(x) offsetof(AVFilterContext, x)
588 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
589 static const AVOption avfilter_options[] = {
590  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
591  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
592  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
593  { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
594  { NULL },
595 };
596 
597 static const AVClass avfilter_class = {
598  .class_name = "AVFilter",
599  .item_name = default_filter_name,
600  .version = LIBAVUTIL_VERSION_INT,
601  .category = AV_CLASS_CATEGORY_FILTER,
602  .child_next = filter_child_next,
603  .child_class_next = filter_child_class_next,
605 };
606 
608  int *ret, int nb_jobs)
609 {
610  int i;
611 
612  for (i = 0; i < nb_jobs; i++) {
613  int r = func(ctx, arg, i, nb_jobs);
614  if (ret)
615  ret[i] = r;
616  }
617  return 0;
618 }
619 
620 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
621 {
623 
624  if (!filter)
625  return NULL;
626 
627  ret = av_mallocz(sizeof(AVFilterContext));
628  if (!ret)
629  return NULL;
630 
631  ret->av_class = &avfilter_class;
632  ret->filter = filter;
633  ret->name = inst_name ? av_strdup(inst_name) : NULL;
634  if (filter->priv_size) {
635  ret->priv = av_mallocz(filter->priv_size);
636  if (!ret->priv)
637  goto err;
638  }
639 
640  av_opt_set_defaults(ret);
641  if (filter->priv_class) {
642  *(const AVClass**)ret->priv = filter->priv_class;
644  }
645 
646  ret->internal = av_mallocz(sizeof(*ret->internal));
647  if (!ret->internal)
648  goto err;
650 
651  ret->nb_inputs = avfilter_pad_count(filter->inputs);
652  if (ret->nb_inputs ) {
653  ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
654  if (!ret->input_pads)
655  goto err;
656  memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
657  ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
658  if (!ret->inputs)
659  goto err;
660  }
661 
662  ret->nb_outputs = avfilter_pad_count(filter->outputs);
663  if (ret->nb_outputs) {
664  ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
665  if (!ret->output_pads)
666  goto err;
667  memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
668  ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
669  if (!ret->outputs)
670  goto err;
671  }
672 #if FF_API_FOO_COUNT
674  ret->output_count = ret->nb_outputs;
675  ret->input_count = ret->nb_inputs;
677 #endif
678 
679  return ret;
680 
681 err:
682  av_freep(&ret->inputs);
683  av_freep(&ret->input_pads);
684  ret->nb_inputs = 0;
685  av_freep(&ret->outputs);
686  av_freep(&ret->output_pads);
687  ret->nb_outputs = 0;
688  av_freep(&ret->priv);
689  av_freep(&ret->internal);
690  av_free(ret);
691  return NULL;
692 }
693 
694 #if FF_API_AVFILTER_OPEN
695 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
696 {
697  *filter_ctx = ff_filter_alloc(filter, inst_name);
698  return *filter_ctx ? 0 : AVERROR(ENOMEM);
699 }
700 #endif
701 
702 static void free_link(AVFilterLink *link)
703 {
704  if (!link)
705  return;
706 
707  if (link->src)
708  link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
709  if (link->dst)
710  link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
711 
718  avfilter_link_free(&link);
719 }
720 
722 {
723  int i;
724 
725  if (!filter)
726  return;
727 
728  if (filter->graph)
729  ff_filter_graph_remove_filter(filter->graph, filter);
730 
731  if (filter->filter->uninit)
732  filter->filter->uninit(filter);
733 
734  for (i = 0; i < filter->nb_inputs; i++) {
735  free_link(filter->inputs[i]);
736  }
737  for (i = 0; i < filter->nb_outputs; i++) {
738  free_link(filter->outputs[i]);
739  }
740 
741  if (filter->filter->priv_class)
742  av_opt_free(filter->priv);
743 
744  av_freep(&filter->name);
745  av_freep(&filter->input_pads);
746  av_freep(&filter->output_pads);
747  av_freep(&filter->inputs);
748  av_freep(&filter->outputs);
749  av_freep(&filter->priv);
750  while(filter->command_queue){
751  ff_command_queue_pop(filter);
752  }
753  av_opt_free(filter);
754  av_expr_free(filter->enable);
755  filter->enable = NULL;
756  av_freep(&filter->var_values);
757  av_freep(&filter->internal);
758  av_free(filter);
759 }
760 
762  const char *args)
763 {
764  const AVOption *o = NULL;
765  int ret, count = 0;
766  char *av_uninit(parsed_key), *av_uninit(value);
767  const char *key;
768  int offset= -1;
769 
770  if (!args)
771  return 0;
772 
773  while (*args) {
774  const char *shorthand = NULL;
775 
776  o = av_opt_next(ctx->priv, o);
777  if (o) {
778  if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
779  continue;
780  offset = o->offset;
781  shorthand = o->name;
782  }
783 
784  ret = av_opt_get_key_value(&args, "=", ":",
785  shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
786  &parsed_key, &value);
787  if (ret < 0) {
788  if (ret == AVERROR(EINVAL))
789  av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
790  else
791  av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
792  av_err2str(ret));
793  return ret;
794  }
795  if (*args)
796  args++;
797  if (parsed_key) {
798  key = parsed_key;
799  while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
800  } else {
801  key = shorthand;
802  }
803 
804  av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
805 
806  if (av_opt_find(ctx, key, NULL, 0, 0)) {
807  ret = av_opt_set(ctx, key, value, 0);
808  if (ret < 0) {
809  av_free(value);
810  av_free(parsed_key);
811  return ret;
812  }
813  } else {
814  av_dict_set(options, key, value, 0);
815  if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
817  if (ret == AVERROR_OPTION_NOT_FOUND)
818  av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
819  av_free(value);
820  av_free(parsed_key);
821  return ret;
822  }
823  }
824  }
825 
826  av_free(value);
827  av_free(parsed_key);
828  count++;
829  }
830 
831  if (ctx->enable_str) {
832  ret = set_enable_expr(ctx, ctx->enable_str);
833  if (ret < 0)
834  return ret;
835  }
836  return count;
837 }
838 
839 #if FF_API_AVFILTER_INIT_FILTER
840 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
841 {
842  return avfilter_init_str(filter, args);
843 }
844 #endif
845 
847 {
848  int ret = 0;
849 
850  ret = av_opt_set_dict(ctx, options);
851  if (ret < 0) {
852  av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
853  return ret;
854  }
855 
858  ctx->graph->internal->thread_execute) {
861  } else {
862  ctx->thread_type = 0;
863  }
864 
865  if (ctx->filter->priv_class) {
866  ret = av_opt_set_dict(ctx->priv, options);
867  if (ret < 0) {
868  av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
869  return ret;
870  }
871  }
872 
873  if (ctx->filter->init_opaque)
874  ret = ctx->filter->init_opaque(ctx, NULL);
875  else if (ctx->filter->init)
876  ret = ctx->filter->init(ctx);
877  else if (ctx->filter->init_dict)
878  ret = ctx->filter->init_dict(ctx, options);
879 
880  return ret;
881 }
882 
884 {
887  int ret = 0;
888 
889  if (args && *args) {
890  if (!filter->filter->priv_class) {
891  av_log(filter, AV_LOG_ERROR, "This filter does not take any "
892  "options, but options were provided: %s.\n", args);
893  return AVERROR(EINVAL);
894  }
895 
896 #if FF_API_OLD_FILTER_OPTS
897  if ( !strcmp(filter->filter->name, "format") ||
898  !strcmp(filter->filter->name, "noformat") ||
899  !strcmp(filter->filter->name, "frei0r") ||
900  !strcmp(filter->filter->name, "frei0r_src") ||
901  !strcmp(filter->filter->name, "ocv") ||
902  !strcmp(filter->filter->name, "pan") ||
903  !strcmp(filter->filter->name, "pp") ||
904  !strcmp(filter->filter->name, "aevalsrc")) {
905  /* a hack for compatibility with the old syntax
906  * replace colons with |s */
907  char *copy = av_strdup(args);
908  char *p = copy;
909  int nb_leading = 0; // number of leading colons to skip
910  int deprecated = 0;
911 
912  if (!copy) {
913  ret = AVERROR(ENOMEM);
914  goto fail;
915  }
916 
917  if (!strcmp(filter->filter->name, "frei0r") ||
918  !strcmp(filter->filter->name, "ocv"))
919  nb_leading = 1;
920  else if (!strcmp(filter->filter->name, "frei0r_src"))
921  nb_leading = 3;
922 
923  while (nb_leading--) {
924  p = strchr(p, ':');
925  if (!p) {
926  p = copy + strlen(copy);
927  break;
928  }
929  p++;
930  }
931 
932  deprecated = strchr(p, ':') != NULL;
933 
934  if (!strcmp(filter->filter->name, "aevalsrc")) {
935  deprecated = 0;
936  while ((p = strchr(p, ':')) && p[1] != ':') {
937  const char *epos = strchr(p + 1, '=');
938  const char *spos = strchr(p + 1, ':');
939  const int next_token_is_opt = epos && (!spos || epos < spos);
940  if (next_token_is_opt) {
941  p++;
942  break;
943  }
944  /* next token does not contain a '=', assume a channel expression */
945  deprecated = 1;
946  *p++ = '|';
947  }
948  if (p && *p == ':') { // double sep '::' found
949  deprecated = 1;
950  memmove(p, p + 1, strlen(p));
951  }
952  } else
953  while ((p = strchr(p, ':')))
954  *p++ = '|';
955 
956  if (deprecated)
957  av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
958  "'|' to separate the list items.\n");
959 
960  av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
961  ret = process_options(filter, &options, copy);
962  av_freep(&copy);
963 
964  if (ret < 0)
965  goto fail;
966 #endif
967  } else {
968  ret = process_options(filter, &options, args);
969  if (ret < 0)
970  goto fail;
971  }
972  }
973 
974  ret = avfilter_init_dict(filter, &options);
975  if (ret < 0)
976  goto fail;
977 
978  if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
979  av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
981  goto fail;
982  }
983 
984 fail:
985  av_dict_free(&options);
986 
987  return ret;
988 }
989 
990 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
991 {
992  return pads[pad_idx].name;
993 }
994 
995 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
996 {
997  return pads[pad_idx].type;
998 }
999 
1001 {
1002  return ff_filter_frame(link->dst->outputs[0], frame);
1003 }
1004 
1006 {
1007  int (*filter_frame)(AVFilterLink *, AVFrame *);
1008  AVFilterContext *dstctx = link->dst;
1009  AVFilterPad *dst = link->dstpad;
1010  AVFrame *out = NULL;
1011  int ret;
1012  AVFilterCommand *cmd= link->dst->command_queue;
1013  int64_t pts;
1014 
1015  if (link->closed) {
1016  av_frame_free(&frame);
1017  return AVERROR_EOF;
1018  }
1019 
1020  if (!(filter_frame = dst->filter_frame))
1022 
1023  /* copy the frame if needed */
1024  if (dst->needs_writable && !av_frame_is_writable(frame)) {
1025  av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1026 
1027  /* Maybe use ff_copy_buffer_ref instead? */
1028  switch (link->type) {
1029  case AVMEDIA_TYPE_VIDEO:
1030  out = ff_get_video_buffer(link, link->w, link->h);
1031  break;
1032  case AVMEDIA_TYPE_AUDIO:
1033  out = ff_get_audio_buffer(link, frame->nb_samples);
1034  break;
1035  default:
1036  ret = AVERROR(EINVAL);
1037  goto fail;
1038  }
1039  if (!out) {
1040  ret = AVERROR(ENOMEM);
1041  goto fail;
1042  }
1043 
1044  ret = av_frame_copy_props(out, frame);
1045  if (ret < 0)
1046  goto fail;
1047 
1048  switch (link->type) {
1049  case AVMEDIA_TYPE_VIDEO:
1050  av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1051  frame->format, frame->width, frame->height);
1052  break;
1053  case AVMEDIA_TYPE_AUDIO:
1055  0, 0, frame->nb_samples,
1057  frame->format);
1058  break;
1059  default:
1060  ret = AVERROR(EINVAL);
1061  goto fail;
1062  }
1063 
1064  av_frame_free(&frame);
1065  } else
1066  out = frame;
1067 
1068  while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1069  av_log(link->dst, AV_LOG_DEBUG,
1070  "Processing command time:%f command:%s arg:%s\n",
1071  cmd->time, cmd->command, cmd->arg);
1072  avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1073  ff_command_queue_pop(link->dst);
1074  cmd= link->dst->command_queue;
1075  }
1076 
1077  pts = out->pts;
1078  if (dstctx->enable_str) {
1079  int64_t pos = av_frame_get_pkt_pos(out);
1080  dstctx->var_values[VAR_N] = link->frame_count;
1081  dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1082  dstctx->var_values[VAR_W] = link->w;
1083  dstctx->var_values[VAR_H] = link->h;
1084  dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1085 
1086  dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1087  if (dstctx->is_disabled &&
1090  }
1091  ret = filter_frame(link, out);
1092  link->frame_count++;
1093  link->frame_requested = 0;
1094  ff_update_link_current_pts(link, pts);
1095  return ret;
1096 
1097 fail:
1098  av_frame_free(&out);
1099  av_frame_free(&frame);
1100  return ret;
1101 }
1102 
1104 {
1105  int insamples = frame->nb_samples, inpos = 0, nb_samples;
1106  AVFrame *pbuf = link->partial_buf;
1107  int nb_channels = av_frame_get_channels(frame);
1108  int ret = 0;
1109 
1111  /* Handle framing (min_samples, max_samples) */
1112  while (insamples) {
1113  if (!pbuf) {
1114  AVRational samples_tb = { 1, link->sample_rate };
1115  pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1116  if (!pbuf) {
1117  av_log(link->dst, AV_LOG_WARNING,
1118  "Samples dropped due to memory allocation failure.\n");
1119  return 0;
1120  }
1121  av_frame_copy_props(pbuf, frame);
1122  pbuf->pts = frame->pts;
1123  if (pbuf->pts != AV_NOPTS_VALUE)
1124  pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1125  pbuf->nb_samples = 0;
1126  }
1127  nb_samples = FFMIN(insamples,
1128  link->partial_buf_size - pbuf->nb_samples);
1130  pbuf->nb_samples, inpos,
1131  nb_samples, nb_channels, link->format);
1132  inpos += nb_samples;
1133  insamples -= nb_samples;
1134  pbuf->nb_samples += nb_samples;
1135  if (pbuf->nb_samples >= link->min_samples) {
1136  ret = ff_filter_frame_framed(link, pbuf);
1137  pbuf = NULL;
1138  }
1139  }
1140  av_frame_free(&frame);
1141  link->partial_buf = pbuf;
1142  return ret;
1143 }
1144 
1146 {
1148 
1149  /* Consistency checks */
1150  if (link->type == AVMEDIA_TYPE_VIDEO) {
1151  if (strcmp(link->dst->filter->name, "scale") &&
1152  strcmp(link->dst->filter->name, "idet")) {
1153  av_assert1(frame->format == link->format);
1154  av_assert1(frame->width == link->w);
1155  av_assert1(frame->height == link->h);
1156  }
1157  } else {
1158  av_assert1(frame->format == link->format);
1159  av_assert1(av_frame_get_channels(frame) == link->channels);
1160  av_assert1(frame->channel_layout == link->channel_layout);
1161  av_assert1(frame->sample_rate == link->sample_rate);
1162  }
1163 
1164  /* Go directly to actual filtering if possible */
1165  if (link->type == AVMEDIA_TYPE_AUDIO &&
1166  link->min_samples &&
1167  (link->partial_buf ||
1168  frame->nb_samples < link->min_samples ||
1169  frame->nb_samples > link->max_samples)) {
1170  return ff_filter_frame_needs_framing(link, frame);
1171  } else {
1172  return ff_filter_frame_framed(link, frame);
1173  }
1174 }
1175 
1177 {
1178  return &avfilter_class;
1179 }
int(* poll_frame)(AVFilterLink *link)
Frame poll callback.
Definition: internal.h:111
double * var_values
variable values for the enable expression
Definition: avfilter.h:685
#define ff_tlog(ctx,...)
Definition: internal.h:60
#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
void avfilter_link_set_closed(AVFilterLink *link, int closed)
Set the closed field of a link.
Definition: avfilter.c:180
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:620
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:1196
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1000
AVOption.
Definition: opt.h:255
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:721
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:441
int(* init)(AVFilterContext *ctx)
Filter initialization function.
Definition: avfilter.h:544
void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref)
Definition: formats.c:481
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1178
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:995
int num
numerator
Definition: rational.h:44
Accept to parse a value without a key; the key will then be returned as NULL.
Definition: opt.h:575
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:72
#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:652
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
int thread_type
Type of multithreading being allowed/used.
Definition: avfilter.h:674
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:686
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:628
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:656
#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:451
const char * name
Pad name.
Definition: internal.h:67
int priv_size
size of private data to allocate for the filter
Definition: avfilter.h:595
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:641
char * name
name of this filter instance
Definition: avfilter.h:638
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:482
const char * name
Definition: opt.h:256
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
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:647
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:120
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
const struct AVOption * option
a pointer to the first option specified in the class if any or NULL
Definition: log.h:85
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
Definition: eval.c:143
int flags
A combination of AVFILTER_FLAG_*.
Definition: avfilter.h:513
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:222
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:89
const AVFilter * avfilter_next(const AVFilter *prev)
Iterate over all registered filters.
Definition: avfilter.c:524
#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:367
void(* uninit)(AVFilterContext *ctx)
Filter uninitialization function.
Definition: avfilter.h:569
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:702
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:615
const OptionDef options[]
Definition: ffserver.c:3812
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:61
void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
Definition: avfilter.c:450
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:308
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
static const AVClass avfilter_class
Definition: avfilter.c:597
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:640
int width
width and height of the video frame
Definition: frame.h:220
#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:487
#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:1150
static const char * default_filter_name(void *filter_ctx)
Definition: avfilter.c:552
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:70
#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:175
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
unsigned nb_outputs
number of output pads
Definition: avfilter.h:652
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:654
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:442
#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:100
char * enable_str
enable expression string
Definition: avfilter.h:683
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:557
simple assert() macros that are a bit more flexible than ISO C assert().
#define FF_TPRINTF_START(ctx, func)
Definition: internal.h:242
static FilteringContext * filter_ctx
Definition: transcoding.c:47
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
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:288
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:427
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:487
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:1484
common internal API header
static void * filter_child_next(void *obj, void *prev)
Definition: avfilter.c:558
const AVOption * av_opt_next(FF_CONST_AVUTIL55 void *obj, const AVOption *last)
Iterate over all AVOptions belonging to obj.
Definition: opt.c:51
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:242
unsigned nb_inputs
number of input pads
Definition: avfilter.h:645
#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:66
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:602
static AVFilter * first_filter
Definition: avfilter.c:481
struct AVFilterCommand * next
Definition: internal.h:49
ret
Definition: avfilter.c:974
static const AVOption avfilter_options[]
Definition: avfilter.c:589
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: aeval.c:415
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
int needs_writable
The filter expects writable frames from its input link, duplicating data buffers if needed...
Definition: internal.h:152
static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1103
int(* init_opaque)(AVFilterContext *ctx, void *opaque)
Filter initialization function, alternative to the init() callback.
Definition: avfilter.h:622
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:883
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:490
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:1176
#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:185
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:232
const AVClass * priv_class
A class for the private data, used to declare filter private AVOptions.
Definition: avfilter.h:508
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AVS_Value src
Definition: avisynth_c.h:482
int offset
The offset relative to the context structure where the option value is stored.
Definition: opt.h:268
void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
Definition: avfilter.c:319
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:312
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:1208
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:488
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1479
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:252
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:463
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:460
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:422
int av_frame_get_channels(const AVFrame *frame)
Filter definition.
Definition: avfilter.h:470
static const char *const var_names[]
Definition: avfilter.c:392
rational number numerator/denominator
Definition: rational.h:43
struct AVFilter * next
Used by the filter registration system.
Definition: avfilter.h:601
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:67
AVMediaType
Definition: avutil.h:199
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:458
const char * name
Filter name.
Definition: avfilter.h:474
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:990
#define FLAGS
Definition: avfilter.c:588
#define LICENSE_PREFIX
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
#define OFFSET(x)
Definition: avfilter.c:587
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:258
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:77
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:679
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:607
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
Initialize a filter with the supplied dictionary of options.
Definition: avfilter.c:846
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1435
Frame requests may need to loop in order to be fulfilled.
Definition: internal.h:359
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
Definition: avfilter.c:410
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
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:464
static double c[64]
struct AVFilterCommand * command_queue
Definition: avfilter.h:681
#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:611
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:206
char * key
Definition: dict.h:87
int den
denominator
Definition: rational.h:45
avfilter_execute_func * execute
Definition: internal.h:162
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:158
#define av_free(p)
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
int avfilter_register(AVFilter *filter)
Register a filter.
Definition: avfilter.c:501
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:372
enum AVOptionType type
Definition: opt.h:269
#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:1361
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:707
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
void * enable
parsed expression (AVExpr*)
Definition: avfilter.h:684
const AVClass * av_class
needed for av_log() and filters common options
Definition: avfilter.h:634
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1005
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
An instance of a filter.
Definition: avfilter.h:633
#define av_uninit(x)
Definition: attributes.h:141
int avfilter_pad_count(const AVFilterPad *pads)
Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
Definition: avfilter.c:540
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:228
int height
Definition: frame.h:220
const AVFilterPad * outputs
List of outputs, terminated by a zeroed element.
Definition: avfilter.h:498
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:136
#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:45
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:343
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:2011
static const AVClass * filter_child_class_next(const AVClass *prev)
Definition: avfilter.c:566
internal API functions
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:215
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:374
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:369
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:225
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:250
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:636
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:548
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
char * command
command
Definition: internal.h:46
#define av_unused
Definition: attributes.h:118
static int process_options(AVFilterContext *ctx, AVDictionary **options, const char *args)
Definition: avfilter.c:761
simple arithmetic expression evaluator
const char * name
Definition: opengl_enc.c:103
char * arg
optional argument for the command
Definition: internal.h:47
#define LIBAVFILTER_VERSION_MICRO
Definition: version.h:34