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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"
25 #include "libavutil/buffer.h"
27 #include "libavutil/common.h"
28 #include "libavutil/eval.h"
29 #include "libavutil/hwcontext.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/rational.h"
35 #include "libavutil/samplefmt.h"
36 
37 #include "audio.h"
38 #include "avfilter.h"
39 #include "formats.h"
40 #include "internal.h"
41 
42 #include "libavutil/ffversion.h"
43 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
44 
46 
47 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
48 {
49  av_unused char buf[16];
50  ff_tlog(ctx,
51  "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
52  ref, ref->buf, ref->data[0],
53  ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
54  ref->pts, av_frame_get_pkt_pos(ref));
55 
56  if (ref->width) {
57  ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
59  ref->width, ref->height,
60  !ref->interlaced_frame ? 'P' : /* Progressive */
61  ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
62  ref->key_frame,
64  }
65  if (ref->nb_samples) {
66  ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
67  ref->channel_layout,
68  ref->nb_samples,
69  ref->sample_rate);
70  }
71 
72  ff_tlog(ctx, "]%s", end ? "\n" : "");
73 }
74 
75 unsigned avfilter_version(void)
76 {
79 }
80 
81 const char *avfilter_configuration(void)
82 {
83  return FFMPEG_CONFIGURATION;
84 }
85 
86 const char *avfilter_license(void)
87 {
88 #define LICENSE_PREFIX "libavfilter license: "
89  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
90 }
91 
93 {
95  av_freep(&c->arg);
96  av_freep(&c->command);
97  filter->command_queue= c->next;
98  av_free(c);
99 }
100 
101 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
102  AVFilterPad **pads, AVFilterLink ***links,
103  AVFilterPad *newpad)
104 {
105  AVFilterLink **newlinks;
106  AVFilterPad *newpads;
107  unsigned i;
108 
109  idx = FFMIN(idx, *count);
110 
111  newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
112  newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
113  if (newpads)
114  *pads = newpads;
115  if (newlinks)
116  *links = newlinks;
117  if (!newpads || !newlinks)
118  return AVERROR(ENOMEM);
119 
120  memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
121  memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
122  memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
123  (*links)[idx] = NULL;
124 
125  (*count)++;
126  for (i = idx + 1; i < *count; i++)
127  if ((*links)[i])
128  (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
129 
130  return 0;
131 }
132 
133 int avfilter_link(AVFilterContext *src, unsigned srcpad,
134  AVFilterContext *dst, unsigned dstpad)
135 {
136  AVFilterLink *link;
137 
138  if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
139  src->outputs[srcpad] || dst->inputs[dstpad])
140  return AVERROR(EINVAL);
141 
142  if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
143  av_log(src, AV_LOG_ERROR,
144  "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
145  src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
146  dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
147  return AVERROR(EINVAL);
148  }
149 
150  link = av_mallocz(sizeof(*link));
151  if (!link)
152  return AVERROR(ENOMEM);
153 
154  src->outputs[srcpad] = dst->inputs[dstpad] = link;
155 
156  link->src = src;
157  link->dst = dst;
158  link->srcpad = &src->output_pads[srcpad];
159  link->dstpad = &dst->input_pads[dstpad];
160  link->type = src->output_pads[srcpad].type;
162  link->format = -1;
163 
164  return 0;
165 }
166 
168 {
169  if (!*link)
170  return;
171 
172  av_frame_free(&(*link)->partial_buf);
173  ff_video_frame_pool_uninit((FFVideoFramePool**)&(*link)->video_frame_pool);
174 
175  av_freep(link);
176 }
177 
179 {
180  return link->channels;
181 }
182 
183 void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
184 {
185  ff_avfilter_link_set_out_status(link, status, pts);
186 }
187 
188 void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
189 {
190  link->status = status;
191  link->frame_wanted_in = link->frame_wanted_out = 0;
192  ff_update_link_current_pts(link, pts);
193 }
194 
195 void avfilter_link_set_closed(AVFilterLink *link, int closed)
196 {
198 }
199 
201  unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
202 {
203  int ret;
204  unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
205 
206  av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
207  "between the filter '%s' and the filter '%s'\n",
208  filt->name, link->src->name, link->dst->name);
209 
210  link->dst->inputs[dstpad_idx] = NULL;
211  if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
212  /* failed to link output filter to new filter */
213  link->dst->inputs[dstpad_idx] = link;
214  return ret;
215  }
216 
217  /* re-hookup the link to the new destination filter we inserted */
218  link->dst = filt;
219  link->dstpad = &filt->input_pads[filt_srcpad_idx];
220  filt->inputs[filt_srcpad_idx] = link;
221 
222  /* if any information on supported media formats already exists on the
223  * link, we need to preserve that */
224  if (link->out_formats)
226  &filt->outputs[filt_dstpad_idx]->out_formats);
227  if (link->out_samplerates)
229  &filt->outputs[filt_dstpad_idx]->out_samplerates);
230  if (link->out_channel_layouts)
232  &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
233 
234  return 0;
235 }
236 
238 {
239  int (*config_link)(AVFilterLink *);
240  unsigned i;
241  int ret;
242 
243  for (i = 0; i < filter->nb_inputs; i ++) {
244  AVFilterLink *link = filter->inputs[i];
245  AVFilterLink *inlink;
246 
247  if (!link) continue;
248  if (!link->src || !link->dst) {
249  av_log(filter, AV_LOG_ERROR,
250  "Not all input and output are properly linked (%d).\n", i);
251  return AVERROR(EINVAL);
252  }
253 
254  inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
255  link->current_pts =
257 
258  switch (link->init_state) {
259  case AVLINK_INIT:
260  continue;
261  case AVLINK_STARTINIT:
262  av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
263  return 0;
264  case AVLINK_UNINIT:
265  link->init_state = AVLINK_STARTINIT;
266 
267  if ((ret = avfilter_config_links(link->src)) < 0)
268  return ret;
269 
270  if (!(config_link = link->srcpad->config_props)) {
271  if (link->src->nb_inputs != 1) {
272  av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
273  "with more than one input "
274  "must set config_props() "
275  "callbacks on all outputs\n");
276  return AVERROR(EINVAL);
277  }
278  } else if ((ret = config_link(link)) < 0) {
279  av_log(link->src, AV_LOG_ERROR,
280  "Failed to configure output pad on %s\n",
281  link->src->name);
282  return ret;
283  }
284 
285  switch (link->type) {
286  case AVMEDIA_TYPE_VIDEO:
287  if (!link->time_base.num && !link->time_base.den)
288  link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
289 
290  if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
291  link->sample_aspect_ratio = inlink ?
292  inlink->sample_aspect_ratio : (AVRational){1,1};
293 
294  if (inlink) {
295  if (!link->frame_rate.num && !link->frame_rate.den)
296  link->frame_rate = inlink->frame_rate;
297  if (!link->w)
298  link->w = inlink->w;
299  if (!link->h)
300  link->h = inlink->h;
301  } else if (!link->w || !link->h) {
302  av_log(link->src, AV_LOG_ERROR,
303  "Video source filters must set their output link's "
304  "width and height\n");
305  return AVERROR(EINVAL);
306  }
307  break;
308 
309  case AVMEDIA_TYPE_AUDIO:
310  if (inlink) {
311  if (!link->time_base.num && !link->time_base.den)
312  link->time_base = inlink->time_base;
313  }
314 
315  if (!link->time_base.num && !link->time_base.den)
316  link->time_base = (AVRational) {1, link->sample_rate};
317  }
318 
319  if ((config_link = link->dstpad->config_props))
320  if ((ret = config_link(link)) < 0) {
321  av_log(link->dst, AV_LOG_ERROR,
322  "Failed to configure input pad on %s\n",
323  link->dst->name);
324  return ret;
325  }
326 
327  if (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx &&
328  !link->hw_frames_ctx) {
329  AVHWFramesContext *input_ctx = (AVHWFramesContext*)link->src->inputs[0]->hw_frames_ctx->data;
330 
331  if (input_ctx->format == link->format) {
332  link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx);
333  if (!link->hw_frames_ctx)
334  return AVERROR(ENOMEM);
335  }
336  }
337 
338  link->init_state = AVLINK_INIT;
339  }
340  }
341 
342  return 0;
343 }
344 
345 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
346 {
347  if (link->type == AVMEDIA_TYPE_VIDEO) {
348  ff_tlog(ctx,
349  "link[%p s:%dx%d fmt:%s %s->%s]%s",
350  link, link->w, link->h,
352  link->src ? link->src->filter->name : "",
353  link->dst ? link->dst->filter->name : "",
354  end ? "\n" : "");
355  } else {
356  char buf[128];
357  av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
358 
359  ff_tlog(ctx,
360  "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
361  link, (int)link->sample_rate, buf,
363  link->src ? link->src->filter->name : "",
364  link->dst ? link->dst->filter->name : "",
365  end ? "\n" : "");
366  }
367 }
368 
370 {
372 
373  if (link->status)
374  return link->status;
375  link->frame_wanted_in = 1;
376  link->frame_wanted_out = 1;
377  return 0;
378 }
379 
381 {
382  int ret = -1;
383 
384  FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
385  link->frame_wanted_in = 0;
386  if (link->srcpad->request_frame)
387  ret = link->srcpad->request_frame(link);
388  else if (link->src->inputs[0])
389  ret = ff_request_frame(link->src->inputs[0]);
390  if (ret == AVERROR_EOF && link->partial_buf) {
391  AVFrame *pbuf = link->partial_buf;
392  link->partial_buf = NULL;
393  ret = ff_filter_frame_framed(link, pbuf);
395  link->frame_wanted_out = 0;
396  return ret;
397  }
398  if (ret < 0) {
399  if (ret != AVERROR(EAGAIN) && ret != link->status)
401  }
402  return ret;
403 }
404 
406 {
407  int i, min = INT_MAX;
408 
409  if (link->srcpad->poll_frame)
410  return link->srcpad->poll_frame(link);
411 
412  for (i = 0; i < link->src->nb_inputs; i++) {
413  int val;
414  if (!link->src->inputs[i])
415  return AVERROR(EINVAL);
416  val = ff_poll_frame(link->src->inputs[i]);
417  min = FFMIN(min, val);
418  }
419 
420  return min;
421 }
422 
423 static const char *const var_names[] = {
424  "t",
425  "n",
426  "pos",
427  "w",
428  "h",
429  NULL
430 };
431 
432 enum {
439 };
440 
441 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
442 {
443  int ret;
444  char *expr_dup;
445  AVExpr *old = ctx->enable;
446 
448  av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
449  "with filter '%s'\n", ctx->filter->name);
450  return AVERROR_PATCHWELCOME;
451  }
452 
453  expr_dup = av_strdup(expr);
454  if (!expr_dup)
455  return AVERROR(ENOMEM);
456 
457  if (!ctx->var_values) {
458  ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
459  if (!ctx->var_values) {
460  av_free(expr_dup);
461  return AVERROR(ENOMEM);
462  }
463  }
464 
465  ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
466  NULL, NULL, NULL, NULL, 0, ctx->priv);
467  if (ret < 0) {
468  av_log(ctx->priv, AV_LOG_ERROR,
469  "Error when evaluating the expression '%s' for enable\n",
470  expr_dup);
471  av_free(expr_dup);
472  return ret;
473  }
474 
475  av_expr_free(old);
476  av_free(ctx->enable_str);
477  ctx->enable_str = expr_dup;
478  return 0;
479 }
480 
482 {
483  if (pts == AV_NOPTS_VALUE)
484  return;
485  link->current_pts = pts;
487  /* TODO use duration */
488  if (link->graph && link->age_index >= 0)
490 }
491 
492 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
493 {
494  if(!strcmp(cmd, "ping")){
495  char local_res[256] = {0};
496 
497  if (!res) {
498  res = local_res;
499  res_len = sizeof(local_res);
500  }
501  av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
502  if (res == local_res)
503  av_log(filter, AV_LOG_INFO, "%s", res);
504  return 0;
505  }else if(!strcmp(cmd, "enable")) {
506  return set_enable_expr(filter, arg);
507  }else if(filter->filter->process_command) {
508  return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
509  }
510  return AVERROR(ENOSYS);
511 }
512 
515 
516 #if !FF_API_NOCONST_GET_NAME
517 const
518 #endif
520 {
521  const AVFilter *f = NULL;
522 
523  if (!name)
524  return NULL;
525 
526  while ((f = avfilter_next(f)))
527  if (!strcmp(f->name, name))
528  return (AVFilter *)f;
529 
530  return NULL;
531 }
532 
534 {
535  AVFilter **f = last_filter;
536 
537  /* the filter must select generic or internal exclusively */
539 
540  filter->next = NULL;
541 
542  while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
543  f = &(*f)->next;
544  last_filter = &filter->next;
545 
546  return 0;
547 }
548 
549 const AVFilter *avfilter_next(const AVFilter *prev)
550 {
551  return prev ? prev->next : first_filter;
552 }
553 
554 #if FF_API_OLD_FILTER_REGISTER
555 AVFilter **av_filter_next(AVFilter **filter)
556 {
557  return filter ? &(*filter)->next : &first_filter;
558 }
559 
560 void avfilter_uninit(void)
561 {
562 }
563 #endif
564 
566 {
567  int count;
568 
569  if (!pads)
570  return 0;
571 
572  for (count = 0; pads->name; count++)
573  pads++;
574  return count;
575 }
576 
577 static const char *default_filter_name(void *filter_ctx)
578 {
580  return ctx->name ? ctx->name : ctx->filter->name;
581 }
582 
583 static void *filter_child_next(void *obj, void *prev)
584 {
585  AVFilterContext *ctx = obj;
586  if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
587  return ctx->priv;
588  return NULL;
589 }
590 
591 static const AVClass *filter_child_class_next(const AVClass *prev)
592 {
593  const AVFilter *f = NULL;
594 
595  /* find the filter that corresponds to prev */
596  while (prev && (f = avfilter_next(f)))
597  if (f->priv_class == prev)
598  break;
599 
600  /* could not find filter corresponding to prev */
601  if (prev && !f)
602  return NULL;
603 
604  /* find next filter with specific options */
605  while ((f = avfilter_next(f)))
606  if (f->priv_class)
607  return f->priv_class;
608 
609  return NULL;
610 }
611 
612 #define OFFSET(x) offsetof(AVFilterContext, x)
613 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
614 static const AVOption avfilter_options[] = {
615  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
616  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
617  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
618  { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
619  { "threads", "Allowed number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT,
620  { .i64 = 0 }, 0, INT_MAX, FLAGS },
621  { NULL },
622 };
623 
624 static const AVClass avfilter_class = {
625  .class_name = "AVFilter",
626  .item_name = default_filter_name,
627  .version = LIBAVUTIL_VERSION_INT,
628  .category = AV_CLASS_CATEGORY_FILTER,
629  .child_next = filter_child_next,
630  .child_class_next = filter_child_class_next,
632 };
633 
635  int *ret, int nb_jobs)
636 {
637  int i;
638 
639  for (i = 0; i < nb_jobs; i++) {
640  int r = func(ctx, arg, i, nb_jobs);
641  if (ret)
642  ret[i] = r;
643  }
644  return 0;
645 }
646 
647 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
648 {
649  AVFilterContext *ret;
650 
651  if (!filter)
652  return NULL;
653 
654  ret = av_mallocz(sizeof(AVFilterContext));
655  if (!ret)
656  return NULL;
657 
658  ret->av_class = &avfilter_class;
659  ret->filter = filter;
660  ret->name = inst_name ? av_strdup(inst_name) : NULL;
661  if (filter->priv_size) {
662  ret->priv = av_mallocz(filter->priv_size);
663  if (!ret->priv)
664  goto err;
665  }
666 
667  av_opt_set_defaults(ret);
668  if (filter->priv_class) {
669  *(const AVClass**)ret->priv = filter->priv_class;
671  }
672 
673  ret->internal = av_mallocz(sizeof(*ret->internal));
674  if (!ret->internal)
675  goto err;
677 
678  ret->nb_inputs = avfilter_pad_count(filter->inputs);
679  if (ret->nb_inputs ) {
680  ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
681  if (!ret->input_pads)
682  goto err;
683  memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
684  ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
685  if (!ret->inputs)
686  goto err;
687  }
688 
689  ret->nb_outputs = avfilter_pad_count(filter->outputs);
690  if (ret->nb_outputs) {
691  ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
692  if (!ret->output_pads)
693  goto err;
694  memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
695  ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
696  if (!ret->outputs)
697  goto err;
698  }
699 
700  return ret;
701 
702 err:
703  av_freep(&ret->inputs);
704  av_freep(&ret->input_pads);
705  ret->nb_inputs = 0;
706  av_freep(&ret->outputs);
707  av_freep(&ret->output_pads);
708  ret->nb_outputs = 0;
709  av_freep(&ret->priv);
710  av_freep(&ret->internal);
711  av_free(ret);
712  return NULL;
713 }
714 
715 #if FF_API_AVFILTER_OPEN
716 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
717 {
718  *filter_ctx = ff_filter_alloc(filter, inst_name);
719  return *filter_ctx ? 0 : AVERROR(ENOMEM);
720 }
721 #endif
722 
723 static void free_link(AVFilterLink *link)
724 {
725  if (!link)
726  return;
727 
728  if (link->src)
729  link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
730  if (link->dst)
731  link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
732 
734 
741  avfilter_link_free(&link);
742 }
743 
745 {
746  int i;
747 
748  if (!filter)
749  return;
750 
751  if (filter->graph)
752  ff_filter_graph_remove_filter(filter->graph, filter);
753 
754  if (filter->filter->uninit)
755  filter->filter->uninit(filter);
756 
757  for (i = 0; i < filter->nb_inputs; i++) {
758  free_link(filter->inputs[i]);
759  }
760  for (i = 0; i < filter->nb_outputs; i++) {
761  free_link(filter->outputs[i]);
762  }
763 
764  if (filter->filter->priv_class)
765  av_opt_free(filter->priv);
766 
767  av_buffer_unref(&filter->hw_device_ctx);
768 
769  av_freep(&filter->name);
770  av_freep(&filter->input_pads);
771  av_freep(&filter->output_pads);
772  av_freep(&filter->inputs);
773  av_freep(&filter->outputs);
774  av_freep(&filter->priv);
775  while(filter->command_queue){
776  ff_command_queue_pop(filter);
777  }
778  av_opt_free(filter);
779  av_expr_free(filter->enable);
780  filter->enable = NULL;
781  av_freep(&filter->var_values);
782  av_freep(&filter->internal);
783  av_free(filter);
784 }
785 
787 {
788  if (ctx->nb_threads > 0)
789  return FFMIN(ctx->nb_threads, ctx->graph->nb_threads);
790  return ctx->graph->nb_threads;
791 }
792 
794  const char *args)
795 {
796  const AVOption *o = NULL;
797  int ret, count = 0;
798  char *av_uninit(parsed_key), *av_uninit(value);
799  const char *key;
800  int offset= -1;
801 
802  if (!args)
803  return 0;
804 
805  while (*args) {
806  const char *shorthand = NULL;
807 
808  o = av_opt_next(ctx->priv, o);
809  if (o) {
810  if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
811  continue;
812  offset = o->offset;
813  shorthand = o->name;
814  }
815 
816  ret = av_opt_get_key_value(&args, "=", ":",
817  shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
818  &parsed_key, &value);
819  if (ret < 0) {
820  if (ret == AVERROR(EINVAL))
821  av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
822  else
823  av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
824  av_err2str(ret));
825  return ret;
826  }
827  if (*args)
828  args++;
829  if (parsed_key) {
830  key = parsed_key;
831  while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
832  } else {
833  key = shorthand;
834  }
835 
836  av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
837 
838  if (av_opt_find(ctx, key, NULL, 0, 0)) {
839  ret = av_opt_set(ctx, key, value, 0);
840  if (ret < 0) {
841  av_free(value);
842  av_free(parsed_key);
843  return ret;
844  }
845  } else {
846  av_dict_set(options, key, value, 0);
847  if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
849  if (ret == AVERROR_OPTION_NOT_FOUND)
850  av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
851  av_free(value);
852  av_free(parsed_key);
853  return ret;
854  }
855  }
856  }
857 
858  av_free(value);
859  av_free(parsed_key);
860  count++;
861  }
862 
863  if (ctx->enable_str) {
864  ret = set_enable_expr(ctx, ctx->enable_str);
865  if (ret < 0)
866  return ret;
867  }
868  return count;
869 }
870 
871 #if FF_API_AVFILTER_INIT_FILTER
872 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
873 {
874  return avfilter_init_str(filter, args);
875 }
876 #endif
877 
879 {
880  int ret = 0;
881 
882  ret = av_opt_set_dict(ctx, options);
883  if (ret < 0) {
884  av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
885  return ret;
886  }
887 
890  ctx->graph->internal->thread_execute) {
893  } else {
894  ctx->thread_type = 0;
895  }
896 
897  if (ctx->filter->priv_class) {
898  ret = av_opt_set_dict(ctx->priv, options);
899  if (ret < 0) {
900  av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
901  return ret;
902  }
903  }
904 
905  if (ctx->filter->init_opaque)
906  ret = ctx->filter->init_opaque(ctx, NULL);
907  else if (ctx->filter->init)
908  ret = ctx->filter->init(ctx);
909  else if (ctx->filter->init_dict)
910  ret = ctx->filter->init_dict(ctx, options);
911 
912  return ret;
913 }
914 
916 {
919  int ret = 0;
920 
921  if (args && *args) {
922  if (!filter->filter->priv_class) {
923  av_log(filter, AV_LOG_ERROR, "This filter does not take any "
924  "options, but options were provided: %s.\n", args);
925  return AVERROR(EINVAL);
926  }
927 
928 #if FF_API_OLD_FILTER_OPTS || FF_API_OLD_FILTER_OPTS_ERROR
929  if ( !strcmp(filter->filter->name, "format") ||
930  !strcmp(filter->filter->name, "noformat") ||
931  !strcmp(filter->filter->name, "frei0r") ||
932  !strcmp(filter->filter->name, "frei0r_src") ||
933  !strcmp(filter->filter->name, "ocv") ||
934  !strcmp(filter->filter->name, "pan") ||
935  !strcmp(filter->filter->name, "pp") ||
936  !strcmp(filter->filter->name, "aevalsrc")) {
937  /* a hack for compatibility with the old syntax
938  * replace colons with |s */
939  char *copy = av_strdup(args);
940  char *p = copy;
941  int nb_leading = 0; // number of leading colons to skip
942  int deprecated = 0;
943 
944  if (!copy) {
945  ret = AVERROR(ENOMEM);
946  goto fail;
947  }
948 
949  if (!strcmp(filter->filter->name, "frei0r") ||
950  !strcmp(filter->filter->name, "ocv"))
951  nb_leading = 1;
952  else if (!strcmp(filter->filter->name, "frei0r_src"))
953  nb_leading = 3;
954 
955  while (nb_leading--) {
956  p = strchr(p, ':');
957  if (!p) {
958  p = copy + strlen(copy);
959  break;
960  }
961  p++;
962  }
963 
964  deprecated = strchr(p, ':') != NULL;
965 
966  if (!strcmp(filter->filter->name, "aevalsrc")) {
967  deprecated = 0;
968  while ((p = strchr(p, ':')) && p[1] != ':') {
969  const char *epos = strchr(p + 1, '=');
970  const char *spos = strchr(p + 1, ':');
971  const int next_token_is_opt = epos && (!spos || epos < spos);
972  if (next_token_is_opt) {
973  p++;
974  break;
975  }
976  /* next token does not contain a '=', assume a channel expression */
977  deprecated = 1;
978  *p++ = '|';
979  }
980  if (p && *p == ':') { // double sep '::' found
981  deprecated = 1;
982  memmove(p, p + 1, strlen(p));
983  }
984  } else
985  while ((p = strchr(p, ':')))
986  *p++ = '|';
987 
988 #if FF_API_OLD_FILTER_OPTS
989  if (deprecated)
990  av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
991  "'|' to separate the list items.\n");
992 
993  av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
994  ret = process_options(filter, &options, copy);
995 #else
996  if (deprecated) {
997  av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
998  "'|' to separate the list items ('%s' instead of '%s')\n",
999  copy, args);
1000  ret = AVERROR(EINVAL);
1001  } else {
1002  ret = process_options(filter, &options, copy);
1003  }
1004 #endif
1005  av_freep(&copy);
1006 
1007  if (ret < 0)
1008  goto fail;
1009  } else
1010 #endif
1011  {
1012  ret = process_options(filter, &options, args);
1013  if (ret < 0)
1014  goto fail;
1015  }
1016  }
1017 
1018  ret = avfilter_init_dict(filter, &options);
1019  if (ret < 0)
1020  goto fail;
1021 
1022  if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1023  av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
1025  goto fail;
1026  }
1027 
1028 fail:
1029  av_dict_free(&options);
1030 
1031  return ret;
1032 }
1033 
1034 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
1035 {
1036  return pads[pad_idx].name;
1037 }
1038 
1039 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
1040 {
1041  return pads[pad_idx].type;
1042 }
1043 
1045 {
1046  return ff_filter_frame(link->dst->outputs[0], frame);
1047 }
1048 
1050 {
1051  int (*filter_frame)(AVFilterLink *, AVFrame *);
1052  AVFilterContext *dstctx = link->dst;
1053  AVFilterPad *dst = link->dstpad;
1054  AVFrame *out = NULL;
1055  int ret;
1056  AVFilterCommand *cmd= link->dst->command_queue;
1057  int64_t pts;
1058 
1059  if (link->status) {
1060  av_frame_free(&frame);
1061  return link->status;
1062  }
1063 
1064  if (!(filter_frame = dst->filter_frame))
1066 
1067  /* copy the frame if needed */
1068  if (dst->needs_writable && !av_frame_is_writable(frame)) {
1069  av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1070 
1071  switch (link->type) {
1072  case AVMEDIA_TYPE_VIDEO:
1073  out = ff_get_video_buffer(link, link->w, link->h);
1074  break;
1075  case AVMEDIA_TYPE_AUDIO:
1076  out = ff_get_audio_buffer(link, frame->nb_samples);
1077  break;
1078  default:
1079  ret = AVERROR(EINVAL);
1080  goto fail;
1081  }
1082  if (!out) {
1083  ret = AVERROR(ENOMEM);
1084  goto fail;
1085  }
1086 
1087  ret = av_frame_copy_props(out, frame);
1088  if (ret < 0)
1089  goto fail;
1090 
1091  switch (link->type) {
1092  case AVMEDIA_TYPE_VIDEO:
1093  av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1094  frame->format, frame->width, frame->height);
1095  break;
1096  case AVMEDIA_TYPE_AUDIO:
1098  0, 0, frame->nb_samples,
1100  frame->format);
1101  break;
1102  default:
1103  ret = AVERROR(EINVAL);
1104  goto fail;
1105  }
1106 
1107  av_frame_free(&frame);
1108  } else
1109  out = frame;
1110 
1111  while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1112  av_log(link->dst, AV_LOG_DEBUG,
1113  "Processing command time:%f command:%s arg:%s\n",
1114  cmd->time, cmd->command, cmd->arg);
1115  avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1116  ff_command_queue_pop(link->dst);
1117  cmd= link->dst->command_queue;
1118  }
1119 
1120  pts = out->pts;
1121  if (dstctx->enable_str) {
1122  int64_t pos = av_frame_get_pkt_pos(out);
1123  dstctx->var_values[VAR_N] = link->frame_count;
1124  dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1125  dstctx->var_values[VAR_W] = link->w;
1126  dstctx->var_values[VAR_H] = link->h;
1127  dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1128 
1129  dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1130  if (dstctx->is_disabled &&
1133  }
1134  ret = filter_frame(link, out);
1135  link->frame_count++;
1136  ff_update_link_current_pts(link, pts);
1137  return ret;
1138 
1139 fail:
1140  av_frame_free(&out);
1141  av_frame_free(&frame);
1142  return ret;
1143 }
1144 
1146 {
1147  int insamples = frame->nb_samples, inpos = 0, nb_samples;
1148  AVFrame *pbuf = link->partial_buf;
1149  int nb_channels = av_frame_get_channels(frame);
1150  int ret = 0;
1151 
1152  /* Handle framing (min_samples, max_samples) */
1153  while (insamples) {
1154  if (!pbuf) {
1155  AVRational samples_tb = { 1, link->sample_rate };
1156  pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1157  if (!pbuf) {
1158  av_log(link->dst, AV_LOG_WARNING,
1159  "Samples dropped due to memory allocation failure.\n");
1160  return 0;
1161  }
1162  av_frame_copy_props(pbuf, frame);
1163  pbuf->pts = frame->pts;
1164  if (pbuf->pts != AV_NOPTS_VALUE)
1165  pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1166  pbuf->nb_samples = 0;
1167  }
1168  nb_samples = FFMIN(insamples,
1169  link->partial_buf_size - pbuf->nb_samples);
1171  pbuf->nb_samples, inpos,
1172  nb_samples, nb_channels, link->format);
1173  inpos += nb_samples;
1174  insamples -= nb_samples;
1175  pbuf->nb_samples += nb_samples;
1176  if (pbuf->nb_samples >= link->min_samples) {
1177  ret = ff_filter_frame_framed(link, pbuf);
1178  pbuf = NULL;
1179  } else {
1180  if (link->frame_wanted_out)
1181  link->frame_wanted_in = 1;
1182  }
1183  }
1184  av_frame_free(&frame);
1185  link->partial_buf = pbuf;
1186  return ret;
1187 }
1188 
1190 {
1192 
1193  /* Consistency checks */
1194  if (link->type == AVMEDIA_TYPE_VIDEO) {
1195  if (strcmp(link->dst->filter->name, "buffersink") &&
1196  strcmp(link->dst->filter->name, "format") &&
1197  strcmp(link->dst->filter->name, "idet") &&
1198  strcmp(link->dst->filter->name, "null") &&
1199  strcmp(link->dst->filter->name, "scale")) {
1200  av_assert1(frame->format == link->format);
1201  av_assert1(frame->width == link->w);
1202  av_assert1(frame->height == link->h);
1203  }
1204  } else {
1205  if (frame->format != link->format) {
1206  av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1207  goto error;
1208  }
1209  if (av_frame_get_channels(frame) != link->channels) {
1210  av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1211  goto error;
1212  }
1213  if (frame->channel_layout != link->channel_layout) {
1214  av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1215  goto error;
1216  }
1217  if (frame->sample_rate != link->sample_rate) {
1218  av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1219  goto error;
1220  }
1221  }
1222 
1223  link->frame_wanted_out = 0;
1224  /* Go directly to actual filtering if possible */
1225  if (link->type == AVMEDIA_TYPE_AUDIO &&
1226  link->min_samples &&
1227  (link->partial_buf ||
1228  frame->nb_samples < link->min_samples ||
1229  frame->nb_samples > link->max_samples)) {
1230  return ff_filter_frame_needs_framing(link, frame);
1231  } else {
1232  return ff_filter_frame_framed(link, frame);
1233  }
1234 error:
1235  av_frame_free(&frame);
1236  return AVERROR_PATCHWELCOME;
1237 }
1238 
1240 {
1241  return &avfilter_class;
1242 }
int(* poll_frame)(AVFilterLink *link)
Frame poll callback.
Definition: internal.h:103
double * var_values
variable values for the enable expression
Definition: avfilter.h:353
#define ff_tlog(ctx,...)
Definition: internal.h:65
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
Definition: avfilter.c:47
static void copy(const float *p1, float *p2, const int length)
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:124
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:647
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:806
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1044
AVOption.
Definition: opt.h:245
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:744
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:85
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:363
int(* init)(AVFilterContext *ctx)
Filter initialization function.
Definition: avfilter.h:218
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:1264
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1039
int num
Numerator.
Definition: rational.h:59
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in...
Definition: avfilter.h:363
enum AVPixelFormat format
The pixel format identifying the underlying HW surface type.
Definition: hwcontext.h:201
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:64
#define LIBAVFILTER_VERSION_INT
Definition: version.h:36
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
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:658
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:342
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:354
int nb_threads
Max number of threads allowed in this filter instance.
Definition: avfilter.h:370
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:260
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:302
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:324
#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:125
const char * name
Pad name.
Definition: internal.h:59
int priv_size
size of private data to allocate for the filter
Definition: avfilter.h:269
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:315
char * name
name of this filter instance
Definition: avfilter.h:312
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:514
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:1189
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:133
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:318
const char * avfilter_license(void)
Return the libavfilter license.
Definition: avfilter.c:86
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
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:268
Definition: eval.c:149
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:80
Video frame pool.
Definition: framepool.c:29
int flags
A combination of AVFILTER_FLAG_*.
Definition: avfilter.h:187
void ff_command_queue_pop(AVFilterContext *filter)
Definition: avfilter.c:92
static AVFrame * frame
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:40
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:813
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:237
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:549
#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:318
void(* uninit)(AVFilterContext *ctx)
Filter uninitialization function.
Definition: avfilter.h:243
static void free_link(AVFilterLink *link)
Definition: avfilter.c:723
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:289
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
const OptionDef options[]
Definition: ffserver.c:3969
#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:481
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:302
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:624
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:314
int width
width and height of the video frame
Definition: frame.h:236
#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:769
static const char * default_filter_name(void *filter_ctx)
Definition: avfilter.c:577
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:178
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:320
unsigned avfilter_version(void)
Return the LIBAVFILTER_VERSION_INT constant.
Definition: avfilter.c:75
const char * r
Definition: vf_curves.c:111
void * priv
private data for use by the filter
Definition: avfilter.h:322
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
#define AV_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:351
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
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:231
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:49
Accept to parse a value without a key; the key will then be returned as NULL.
Definition: opt.h:529
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:226
#define fail()
Definition: checkasm.h:82
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:349
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:519
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:1566
common internal API header
static void * filter_child_next(void *obj, void *prev)
Definition: avfilter.c:583
void avfilter_link_set_closed(AVFilterLink *link, int closed)
Set the closed field of a link.
Definition: avfilter.c:195
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:258
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:786
unsigned nb_inputs
number of input pads
Definition: avfilter.h:316
#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:513
struct AVFilterCommand * next
Definition: internal.h:42
static const AVOption avfilter_options[]
Definition: avfilter.c:614
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
AVFormatContext * ctx
Definition: movenc.c:48
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:188
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:1145
int(* init_opaque)(AVFilterContext *ctx, void *opaque)
Filter initialization function, alternative to the init() callback.
Definition: avfilter.h:296
#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:915
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:164
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:1239
#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:200
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:248
const AVClass * priv_class
A class for the private data, used to declare filter private AVOptions.
Definition: avfilter.h:182
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
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:345
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:318
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:254
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:818
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:521
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1561
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
int ff_request_frame_to_filter(AVFilterLink *link)
Definition: avfilter.c:380
uint8_t * data
The data buffer.
Definition: buffer.h:89
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:263
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:492
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:213
void * buf
Definition: avisynth_c.h:690
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:70
const char av_filter_ffversion[]
Definition: avfilter.c:43
Describe the class of an AVClass context structure.
Definition: log.h:67
int sample_rate
Sample rate of the audio data.
Definition: frame.h:344
int av_frame_get_channels(const AVFrame *frame)
Filter definition.
Definition: avfilter.h:144
static const char *const var_names[]
Definition: avfilter.c:423
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct AVFilter * next
Used by the filter registration system.
Definition: avfilter.h:275
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:116
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:67
AVMediaType
Definition: avutil.h:193
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
refcounted data buffer API
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:148
const char * avfilter_configuration(void)
Return the libavfilter build-time configuration.
Definition: avfilter.c:81
const char * avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
Get the name of an AVFilterPad.
Definition: avfilter.c:1034
#define FLAGS
Definition: avfilter.c:613
#define LICENSE_PREFIX
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:319
#define OFFSET(x)
Definition: avfilter.c:612
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:347
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:634
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
Initialize a filter with the supplied dictionary of options.
Definition: avfilter.c:878
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1516
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
Definition: avfilter.c:441
common internal and external API header
if(ret< 0)
Definition: vf_mcdeint.c:282
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
Utilties for rational number calculation.
#define AVFILTER_FLAG_SUPPORT_TIMELINE
Handy mask to test whether the filter supports or no the timeline feature (internally or generically)...
Definition: avfilter.h:138
static double c[64]
struct AVFilterCommand * command_queue
Definition: avfilter.h:349
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:92
#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
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
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:533
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:323
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:1442
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:713
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
void * enable
parsed expression (AVExpr*)
Definition: avfilter.h:352
const AVClass * av_class
needed for av_log() and filters common options
Definition: avfilter.h:308
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1049
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
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:183
An instance of a filter.
Definition: avfilter.h:307
#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:565
int height
Definition: frame.h:236
FILE * out
Definition: movenc.c:54
const AVFilterPad * outputs
List of outputs, terminated by a zeroed element.
Definition: avfilter.h:172
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:101
#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:70
#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:369
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:2179
static const AVClass * filter_child_class_next(const AVClass *prev)
Definition: avfilter.c:591
internal API functions
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:405
float min
void avfilter_link_free(AVFilterLink **link)
Free the link in *link, and set its pointer to NULL.
Definition: avfilter.c:167
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:431
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:310
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:581
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
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:793
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