FFmpeg  2.1.1
avfilter.c
Go to the documentation of this file.
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/channel_layout.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 
41 
42 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
43 {
44  av_unused char buf[16];
45  ff_tlog(ctx,
46  "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
47  ref, ref->buf, ref->data[0],
48  ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
49  ref->pts, av_frame_get_pkt_pos(ref));
50 
51  if (ref->width) {
52  ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
54  ref->width, ref->height,
55  !ref->interlaced_frame ? 'P' : /* Progressive */
56  ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
57  ref->key_frame,
59  }
60  if (ref->nb_samples) {
61  ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
62  ref->channel_layout,
63  ref->nb_samples,
64  ref->sample_rate);
65  }
66 
67  ff_tlog(ctx, "]%s", end ? "\n" : "");
68 }
69 
70 unsigned avfilter_version(void)
71 {
74 }
75 
76 const char *avfilter_configuration(void)
77 {
78  return FFMPEG_CONFIGURATION;
79 }
80 
81 const char *avfilter_license(void)
82 {
83 #define LICENSE_PREFIX "libavfilter license: "
84  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
85 }
86 
88 {
90  av_freep(&c->arg);
91  av_freep(&c->command);
92  filter->command_queue= c->next;
93  av_free(c);
94 }
95 
96 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
97  AVFilterPad **pads, AVFilterLink ***links,
98  AVFilterPad *newpad)
99 {
100  AVFilterLink **newlinks;
101  AVFilterPad *newpads;
102  unsigned i;
103 
104  idx = FFMIN(idx, *count);
105 
106  newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
107  newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
108  if (newpads)
109  *pads = newpads;
110  if (newlinks)
111  *links = newlinks;
112  if (!newpads || !newlinks)
113  return AVERROR(ENOMEM);
114 
115  memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
116  memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
117  memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
118  (*links)[idx] = NULL;
119 
120  (*count)++;
121  for (i = idx + 1; i < *count; i++)
122  if ((*links)[i])
123  (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
124 
125  return 0;
126 }
127 
128 int avfilter_link(AVFilterContext *src, unsigned srcpad,
129  AVFilterContext *dst, unsigned dstpad)
130 {
131  AVFilterLink *link;
132 
133  if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
134  src->outputs[srcpad] || dst->inputs[dstpad])
135  return -1;
136 
137  if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
138  av_log(src, AV_LOG_ERROR,
139  "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
140  src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
141  dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
142  return AVERROR(EINVAL);
143  }
144 
145  link = av_mallocz(sizeof(*link));
146  if (!link)
147  return AVERROR(ENOMEM);
148 
149  src->outputs[srcpad] = dst->inputs[dstpad] = link;
150 
151  link->src = src;
152  link->dst = dst;
153  link->srcpad = &src->output_pads[srcpad];
154  link->dstpad = &dst->input_pads[dstpad];
155  link->type = src->output_pads[srcpad].type;
157  link->format = -1;
158 
159  return 0;
160 }
161 
163 {
164  if (!*link)
165  return;
166 
167  av_frame_free(&(*link)->partial_buf);
168 
169  av_freep(link);
170 }
171 
173 {
174  return link->channels;
175 }
176 
177 void avfilter_link_set_closed(AVFilterLink *link, int closed)
178 {
179  link->closed = closed;
180 }
181 
183  unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
184 {
185  int ret;
186  unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
187 
188  av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
189  "between the filter '%s' and the filter '%s'\n",
190  filt->name, link->src->name, link->dst->name);
191 
192  link->dst->inputs[dstpad_idx] = NULL;
193  if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
194  /* failed to link output filter to new filter */
195  link->dst->inputs[dstpad_idx] = link;
196  return ret;
197  }
198 
199  /* re-hookup the link to the new destination filter we inserted */
200  link->dst = filt;
201  link->dstpad = &filt->input_pads[filt_srcpad_idx];
202  filt->inputs[filt_srcpad_idx] = link;
203 
204  /* if any information on supported media formats already exists on the
205  * link, we need to preserve that */
206  if (link->out_formats)
208  &filt->outputs[filt_dstpad_idx]->out_formats);
209  if (link->out_samplerates)
211  &filt->outputs[filt_dstpad_idx]->out_samplerates);
212  if (link->out_channel_layouts)
214  &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
215 
216  return 0;
217 }
218 
220 {
221  int (*config_link)(AVFilterLink *);
222  unsigned i;
223  int ret;
224 
225  for (i = 0; i < filter->nb_inputs; i ++) {
226  AVFilterLink *link = filter->inputs[i];
227  AVFilterLink *inlink;
228 
229  if (!link) continue;
230 
231  inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
232  link->current_pts = AV_NOPTS_VALUE;
233 
234  switch (link->init_state) {
235  case AVLINK_INIT:
236  continue;
237  case AVLINK_STARTINIT:
238  av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
239  return 0;
240  case AVLINK_UNINIT:
241  link->init_state = AVLINK_STARTINIT;
242 
243  if ((ret = avfilter_config_links(link->src)) < 0)
244  return ret;
245 
246  if (!(config_link = link->srcpad->config_props)) {
247  if (link->src->nb_inputs != 1) {
248  av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
249  "with more than one input "
250  "must set config_props() "
251  "callbacks on all outputs\n");
252  return AVERROR(EINVAL);
253  }
254  } else if ((ret = config_link(link)) < 0) {
255  av_log(link->src, AV_LOG_ERROR,
256  "Failed to configure output pad on %s\n",
257  link->src->name);
258  return ret;
259  }
260 
261  switch (link->type) {
262  case AVMEDIA_TYPE_VIDEO:
263  if (!link->time_base.num && !link->time_base.den)
264  link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
265 
266  if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
267  link->sample_aspect_ratio = inlink ?
268  inlink->sample_aspect_ratio : (AVRational){1,1};
269 
270  if (inlink && !link->frame_rate.num && !link->frame_rate.den)
271  link->frame_rate = inlink->frame_rate;
272 
273  if (inlink) {
274  if (!link->w)
275  link->w = inlink->w;
276  if (!link->h)
277  link->h = inlink->h;
278  } else if (!link->w || !link->h) {
279  av_log(link->src, AV_LOG_ERROR,
280  "Video source filters must set their output link's "
281  "width and height\n");
282  return AVERROR(EINVAL);
283  }
284  break;
285 
286  case AVMEDIA_TYPE_AUDIO:
287  if (inlink) {
288  if (!link->time_base.num && !link->time_base.den)
289  link->time_base = inlink->time_base;
290  }
291 
292  if (!link->time_base.num && !link->time_base.den)
293  link->time_base = (AVRational) {1, link->sample_rate};
294  }
295 
296  if ((config_link = link->dstpad->config_props))
297  if ((ret = config_link(link)) < 0) {
298  av_log(link->src, AV_LOG_ERROR,
299  "Failed to configure input pad on %s\n",
300  link->dst->name);
301  return ret;
302  }
303 
304  link->init_state = AVLINK_INIT;
305  }
306  }
307 
308  return 0;
309 }
310 
311 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
312 {
313  if (link->type == AVMEDIA_TYPE_VIDEO) {
314  ff_tlog(ctx,
315  "link[%p s:%dx%d fmt:%s %s->%s]%s",
316  link, link->w, link->h,
318  link->src ? link->src->filter->name : "",
319  link->dst ? link->dst->filter->name : "",
320  end ? "\n" : "");
321  } else {
322  char buf[128];
323  av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
324 
325  ff_tlog(ctx,
326  "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
327  link, (int)link->sample_rate, buf,
329  link->src ? link->src->filter->name : "",
330  link->dst ? link->dst->filter->name : "",
331  end ? "\n" : "");
332  }
333 }
334 
336 {
337  int ret = -1;
338  FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
339 
340  if (link->closed)
341  return AVERROR_EOF;
342  av_assert0(!link->frame_requested);
343  link->frame_requested = 1;
344  while (link->frame_requested) {
345  if (link->srcpad->request_frame)
346  ret = link->srcpad->request_frame(link);
347  else if (link->src->inputs[0])
348  ret = ff_request_frame(link->src->inputs[0]);
349  if (ret == AVERROR_EOF && link->partial_buf) {
350  AVFrame *pbuf = link->partial_buf;
351  link->partial_buf = NULL;
352  ret = ff_filter_frame_framed(link, pbuf);
353  }
354  if (ret < 0) {
355  link->frame_requested = 0;
356  if (ret == AVERROR_EOF)
357  link->closed = 1;
358  } else {
359  av_assert0(!link->frame_requested ||
361  }
362  }
363  return ret;
364 }
365 
367 {
368  int i, min = INT_MAX;
369 
370  if (link->srcpad->poll_frame)
371  return link->srcpad->poll_frame(link);
372 
373  for (i = 0; i < link->src->nb_inputs; i++) {
374  int val;
375  if (!link->src->inputs[i])
376  return -1;
377  val = ff_poll_frame(link->src->inputs[i]);
378  min = FFMIN(min, val);
379  }
380 
381  return min;
382 }
383 
384 static const char *const var_names[] = { "t", "n", "pos", NULL };
386 
387 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
388 {
389  int ret;
390  char *expr_dup;
391  AVExpr *old = ctx->enable;
392 
394  av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
395  "with filter '%s'\n", ctx->filter->name);
396  return AVERROR_PATCHWELCOME;
397  }
398 
399  expr_dup = av_strdup(expr);
400  if (!expr_dup)
401  return AVERROR(ENOMEM);
402 
403  if (!ctx->var_values) {
404  ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
405  if (!ctx->var_values) {
406  av_free(expr_dup);
407  return AVERROR(ENOMEM);
408  }
409  }
410 
411  ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
412  NULL, NULL, NULL, NULL, 0, ctx->priv);
413  if (ret < 0) {
414  av_log(ctx->priv, AV_LOG_ERROR,
415  "Error when evaluating the expression '%s' for enable\n",
416  expr_dup);
417  av_free(expr_dup);
418  return ret;
419  }
420 
421  av_expr_free(old);
422  av_free(ctx->enable_str);
423  ctx->enable_str = expr_dup;
424  return 0;
425 }
426 
427 void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
428 {
429  if (pts == AV_NOPTS_VALUE)
430  return;
431  link->current_pts = av_rescale_q(pts, link->time_base, AV_TIME_BASE_Q);
432  /* TODO use duration */
433  if (link->graph && link->age_index >= 0)
435 }
436 
437 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
438 {
439  if(!strcmp(cmd, "ping")){
440  char local_res[256] = {0};
441 
442  if (!res) {
443  res = local_res;
444  res_len = sizeof(local_res);
445  }
446  av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
447  if (res == local_res)
448  av_log(filter, AV_LOG_INFO, "%s", res);
449  return 0;
450  }else if(!strcmp(cmd, "enable")) {
451  return set_enable_expr(filter, arg);
452  }else if(filter->filter->process_command) {
453  return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
454  }
455  return AVERROR(ENOSYS);
456 }
457 
459 
461 {
462  const AVFilter *f = NULL;
463 
464  if (!name)
465  return NULL;
466 
467  while ((f = avfilter_next(f)))
468  if (!strcmp(f->name, name))
469  return (AVFilter *)f;
470 
471  return NULL;
472 }
473 
475 {
476  AVFilter **f = &first_filter;
477  int i;
478 
479  /* the filter must select generic or internal exclusively */
481 
482  for(i=0; filter->inputs && filter->inputs[i].name; i++) {
483  const AVFilterPad *input = &filter->inputs[i];
484  av_assert0( !input->filter_frame
485  || (!input->start_frame && !input->end_frame));
486  }
487 
488  filter->next = NULL;
489 
490  while(avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
491  f = &(*f)->next;
492 
493  return 0;
494 }
495 
496 const AVFilter *avfilter_next(const AVFilter *prev)
497 {
498  return prev ? prev->next : first_filter;
499 }
500 
501 #if FF_API_OLD_FILTER_REGISTER
502 AVFilter **av_filter_next(AVFilter **filter)
503 {
504  return filter ? &(*filter)->next : &first_filter;
505 }
506 
507 void avfilter_uninit(void)
508 {
509 }
510 #endif
511 
513 {
514  int count;
515 
516  if (!pads)
517  return 0;
518 
519  for (count = 0; pads->name; count++)
520  pads++;
521  return count;
522 }
523 
524 static const char *default_filter_name(void *filter_ctx)
525 {
526  AVFilterContext *ctx = filter_ctx;
527  return ctx->name ? ctx->name : ctx->filter->name;
528 }
529 
530 static void *filter_child_next(void *obj, void *prev)
531 {
532  AVFilterContext *ctx = obj;
533  if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
534  return ctx->priv;
535  return NULL;
536 }
537 
538 static const AVClass *filter_child_class_next(const AVClass *prev)
539 {
540  const AVFilter *f = NULL;
541 
542  /* find the filter that corresponds to prev */
543  while (prev && (f = avfilter_next(f)))
544  if (f->priv_class == prev)
545  break;
546 
547  /* could not find filter corresponding to prev */
548  if (prev && !f)
549  return NULL;
550 
551  /* find next filter with specific options */
552  while ((f = avfilter_next(f)))
553  if (f->priv_class)
554  return f->priv_class;
555 
556  return NULL;
557 }
558 
559 #define OFFSET(x) offsetof(AVFilterContext, x)
560 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
561 static const AVOption avfilter_options[] = {
562  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
563  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
564  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
565  { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
566  { NULL },
567 };
568 
569 static const AVClass avfilter_class = {
570  .class_name = "AVFilter",
571  .item_name = default_filter_name,
572  .version = LIBAVUTIL_VERSION_INT,
573  .category = AV_CLASS_CATEGORY_FILTER,
574  .child_next = filter_child_next,
575  .child_class_next = filter_child_class_next,
577 };
578 
580  int *ret, int nb_jobs)
581 {
582  int i;
583 
584  for (i = 0; i < nb_jobs; i++) {
585  int r = func(ctx, arg, i, nb_jobs);
586  if (ret)
587  ret[i] = r;
588  }
589  return 0;
590 }
591 
592 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
593 {
595 
596  if (!filter)
597  return NULL;
598 
599  ret = av_mallocz(sizeof(AVFilterContext));
600  if (!ret)
601  return NULL;
602 
603  ret->av_class = &avfilter_class;
604  ret->filter = filter;
605  ret->name = inst_name ? av_strdup(inst_name) : NULL;
606  if (filter->priv_size) {
607  ret->priv = av_mallocz(filter->priv_size);
608  if (!ret->priv)
609  goto err;
610  }
611 
612  av_opt_set_defaults(ret);
613  if (filter->priv_class) {
614  *(const AVClass**)ret->priv = filter->priv_class;
616  }
617 
618  ret->internal = av_mallocz(sizeof(*ret->internal));
619  if (!ret->internal)
620  goto err;
622 
623  ret->nb_inputs = avfilter_pad_count(filter->inputs);
624  if (ret->nb_inputs ) {
625  ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_inputs);
626  if (!ret->input_pads)
627  goto err;
628  memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
629  ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_inputs);
630  if (!ret->inputs)
631  goto err;
632  }
633 
634  ret->nb_outputs = avfilter_pad_count(filter->outputs);
635  if (ret->nb_outputs) {
636  ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->nb_outputs);
637  if (!ret->output_pads)
638  goto err;
639  memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
640  ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->nb_outputs);
641  if (!ret->outputs)
642  goto err;
643  }
644 #if FF_API_FOO_COUNT
646  ret->output_count = ret->nb_outputs;
647  ret->input_count = ret->nb_inputs;
649 #endif
650 
651  return ret;
652 
653 err:
654  av_freep(&ret->inputs);
655  av_freep(&ret->input_pads);
656  ret->nb_inputs = 0;
657  av_freep(&ret->outputs);
658  av_freep(&ret->output_pads);
659  ret->nb_outputs = 0;
660  av_freep(&ret->priv);
661  av_freep(&ret->internal);
662  av_free(ret);
663  return NULL;
664 }
665 
666 #if FF_API_AVFILTER_OPEN
667 int avfilter_open(AVFilterContext **filter_ctx, AVFilter *filter, const char *inst_name)
668 {
669  *filter_ctx = ff_filter_alloc(filter, inst_name);
670  return *filter_ctx ? 0 : AVERROR(ENOMEM);
671 }
672 #endif
673 
674 static void free_link(AVFilterLink *link)
675 {
676  if (!link)
677  return;
678 
679  if (link->src)
680  link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
681  if (link->dst)
682  link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
683 
690  avfilter_link_free(&link);
691 }
692 
694 {
695  int i;
696 
697  if (!filter)
698  return;
699 
700  if (filter->graph)
701  ff_filter_graph_remove_filter(filter->graph, filter);
702 
703  if (filter->filter->uninit)
704  filter->filter->uninit(filter);
705 
706  for (i = 0; i < filter->nb_inputs; i++) {
707  free_link(filter->inputs[i]);
708  }
709  for (i = 0; i < filter->nb_outputs; i++) {
710  free_link(filter->outputs[i]);
711  }
712 
713  if (filter->filter->priv_class)
714  av_opt_free(filter->priv);
715 
716  av_freep(&filter->name);
717  av_freep(&filter->input_pads);
718  av_freep(&filter->output_pads);
719  av_freep(&filter->inputs);
720  av_freep(&filter->outputs);
721  av_freep(&filter->priv);
722  while(filter->command_queue){
723  ff_command_queue_pop(filter);
724  }
725  av_opt_free(filter);
726  av_expr_free(filter->enable);
727  filter->enable = NULL;
728  av_freep(&filter->var_values);
729  av_freep(&filter->internal);
730  av_free(filter);
731 }
732 
734  const char *args)
735 {
736  const AVOption *o = NULL;
737  int ret, count = 0;
738  char *av_uninit(parsed_key), *av_uninit(value);
739  const char *key;
740  int offset= -1;
741 
742  if (!args)
743  return 0;
744 
745  while (*args) {
746  const char *shorthand = NULL;
747 
748  o = av_opt_next(ctx->priv, o);
749  if (o) {
750  if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
751  continue;
752  offset = o->offset;
753  shorthand = o->name;
754  }
755 
756  ret = av_opt_get_key_value(&args, "=", ":",
757  shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
758  &parsed_key, &value);
759  if (ret < 0) {
760  if (ret == AVERROR(EINVAL))
761  av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
762  else
763  av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
764  av_err2str(ret));
765  return ret;
766  }
767  if (*args)
768  args++;
769  if (parsed_key) {
770  key = parsed_key;
771  while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
772  } else {
773  key = shorthand;
774  }
775 
776  av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
777 
778  if (av_opt_find(ctx, key, NULL, 0, 0)) {
779  ret = av_opt_set(ctx, key, value, 0);
780  if (ret < 0) {
781  av_free(value);
782  av_free(parsed_key);
783  return ret;
784  }
785  } else {
786  av_dict_set(options, key, value, 0);
787  if ((ret = av_opt_set(ctx->priv, key, value, 0)) < 0) {
788  if (!av_opt_find(ctx->priv, key, NULL, 0, AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ)) {
789  if (ret == AVERROR_OPTION_NOT_FOUND)
790  av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
791  av_free(value);
792  av_free(parsed_key);
793  return ret;
794  }
795  }
796  }
797 
798  av_free(value);
799  av_free(parsed_key);
800  count++;
801  }
802 
803  if (ctx->enable_str) {
804  ret = set_enable_expr(ctx, ctx->enable_str);
805  if (ret < 0)
806  return ret;
807  }
808  return count;
809 }
810 
811 #if FF_API_AVFILTER_INIT_FILTER
812 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
813 {
814  return avfilter_init_str(filter, args);
815 }
816 #endif
817 
819 {
820  int ret = 0;
821 
822  ret = av_opt_set_dict(ctx, options);
823  if (ret < 0) {
824  av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
825  return ret;
826  }
827 
830  ctx->graph->internal->thread_execute) {
833  } else {
834  ctx->thread_type = 0;
835  }
836 
837  if (ctx->filter->priv_class) {
838  ret = av_opt_set_dict(ctx->priv, options);
839  if (ret < 0) {
840  av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
841  return ret;
842  }
843  }
844 
845  if (ctx->filter->init_opaque)
846  ret = ctx->filter->init_opaque(ctx, NULL);
847  else if (ctx->filter->init)
848  ret = ctx->filter->init(ctx);
849  else if (ctx->filter->init_dict)
850  ret = ctx->filter->init_dict(ctx, options);
851 
852  return ret;
853 }
854 
856 {
857  AVDictionary *options = NULL;
859  int ret = 0;
860 
861  if (args && *args) {
862  if (!filter->filter->priv_class) {
863  av_log(filter, AV_LOG_ERROR, "This filter does not take any "
864  "options, but options were provided: %s.\n", args);
865  return AVERROR(EINVAL);
866  }
867 
868 #if FF_API_OLD_FILTER_OPTS
869  if ( !strcmp(filter->filter->name, "format") ||
870  !strcmp(filter->filter->name, "noformat") ||
871  !strcmp(filter->filter->name, "frei0r") ||
872  !strcmp(filter->filter->name, "frei0r_src") ||
873  !strcmp(filter->filter->name, "ocv") ||
874  !strcmp(filter->filter->name, "pan") ||
875  !strcmp(filter->filter->name, "pp") ||
876  !strcmp(filter->filter->name, "aevalsrc")) {
877  /* a hack for compatibility with the old syntax
878  * replace colons with |s */
879  char *copy = av_strdup(args);
880  char *p = copy;
881  int nb_leading = 0; // number of leading colons to skip
882  int deprecated = 0;
883 
884  if (!copy) {
885  ret = AVERROR(ENOMEM);
886  goto fail;
887  }
888 
889  if (!strcmp(filter->filter->name, "frei0r") ||
890  !strcmp(filter->filter->name, "ocv"))
891  nb_leading = 1;
892  else if (!strcmp(filter->filter->name, "frei0r_src"))
893  nb_leading = 3;
894 
895  while (nb_leading--) {
896  p = strchr(p, ':');
897  if (!p) {
898  p = copy + strlen(copy);
899  break;
900  }
901  p++;
902  }
903 
904  deprecated = strchr(p, ':') != NULL;
905 
906  if (!strcmp(filter->filter->name, "aevalsrc")) {
907  deprecated = 0;
908  while ((p = strchr(p, ':')) && p[1] != ':') {
909  const char *epos = strchr(p + 1, '=');
910  const char *spos = strchr(p + 1, ':');
911  const int next_token_is_opt = epos && (!spos || epos < spos);
912  if (next_token_is_opt) {
913  p++;
914  break;
915  }
916  /* next token does not contain a '=', assume a channel expression */
917  deprecated = 1;
918  *p++ = '|';
919  }
920  if (p && *p == ':') { // double sep '::' found
921  deprecated = 1;
922  memmove(p, p + 1, strlen(p));
923  }
924  } else
925  while ((p = strchr(p, ':')))
926  *p++ = '|';
927 
928  if (deprecated)
929  av_log(filter, AV_LOG_WARNING, "This syntax is deprecated. Use "
930  "'|' to separate the list items.\n");
931 
932  av_log(filter, AV_LOG_DEBUG, "compat: called with args=[%s]\n", copy);
933  ret = process_options(filter, &options, copy);
934  av_freep(&copy);
935 
936  if (ret < 0)
937  goto fail;
938 #endif
939  } else {
940 #if CONFIG_MP_FILTER
941  if (!strcmp(filter->filter->name, "mp")) {
942  char *escaped;
943 
944  if (!strncmp(args, "filter=", 7))
945  args += 7;
946  ret = av_escape(&escaped, args, ":=", AV_ESCAPE_MODE_BACKSLASH, 0);
947  if (ret < 0) {
948  av_log(filter, AV_LOG_ERROR, "Unable to escape MPlayer filters arg '%s'\n", args);
949  goto fail;
950  }
951  ret = process_options(filter, &options, escaped);
952  av_free(escaped);
953  } else
954 #endif
955  ret = process_options(filter, &options, args);
956  if (ret < 0)
957  goto fail;
958  }
959  }
960 
961  ret = avfilter_init_dict(filter, &options);
962  if (ret < 0)
963  goto fail;
964 
965  if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
966  av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
968  goto fail;
969  }
970 
971 fail:
972  av_dict_free(&options);
973 
974  return ret;
975 }
976 
977 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
978 {
979  return pads[pad_idx].name;
980 }
981 
982 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
983 {
984  return pads[pad_idx].type;
985 }
986 
988 {
989  return ff_filter_frame(link->dst->outputs[0], frame);
990 }
991 
993 {
994  int (*filter_frame)(AVFilterLink *, AVFrame *);
995  AVFilterContext *dstctx = link->dst;
996  AVFilterPad *dst = link->dstpad;
997  AVFrame *out;
998  int ret;
999  AVFilterCommand *cmd= link->dst->command_queue;
1000  int64_t pts;
1001 
1002  if (link->closed) {
1003  av_frame_free(&frame);
1004  return AVERROR_EOF;
1005  }
1006 
1007  if (!(filter_frame = dst->filter_frame))
1009 
1010  /* copy the frame if needed */
1011  if (dst->needs_writable && !av_frame_is_writable(frame)) {
1012  av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1013 
1014  /* Maybe use ff_copy_buffer_ref instead? */
1015  switch (link->type) {
1016  case AVMEDIA_TYPE_VIDEO:
1017  out = ff_get_video_buffer(link, link->w, link->h);
1018  break;
1019  case AVMEDIA_TYPE_AUDIO:
1020  out = ff_get_audio_buffer(link, frame->nb_samples);
1021  break;
1022  default: return AVERROR(EINVAL);
1023  }
1024  if (!out) {
1025  av_frame_free(&frame);
1026  return AVERROR(ENOMEM);
1027  }
1028  av_frame_copy_props(out, frame);
1029 
1030  switch (link->type) {
1031  case AVMEDIA_TYPE_VIDEO:
1032  av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1033  frame->format, frame->width, frame->height);
1034  break;
1035  case AVMEDIA_TYPE_AUDIO:
1037  0, 0, frame->nb_samples,
1039  frame->format);
1040  break;
1041  default: return AVERROR(EINVAL);
1042  }
1043 
1044  av_frame_free(&frame);
1045  } else
1046  out = frame;
1047 
1048  while(cmd && cmd->time <= out->pts * av_q2d(link->time_base)){
1049  av_log(link->dst, AV_LOG_DEBUG,
1050  "Processing command time:%f command:%s arg:%s\n",
1051  cmd->time, cmd->command, cmd->arg);
1052  avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1053  ff_command_queue_pop(link->dst);
1054  cmd= link->dst->command_queue;
1055  }
1056 
1057  pts = out->pts;
1058  if (dstctx->enable_str) {
1059  int64_t pos = av_frame_get_pkt_pos(out);
1060  dstctx->var_values[VAR_N] = link->frame_count;
1061  dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1062  dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1063 
1064  dstctx->is_disabled = fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) < 0.5;
1065  if (dstctx->is_disabled &&
1068  }
1069  ret = filter_frame(link, out);
1070  link->frame_count++;
1071  link->frame_requested = 0;
1072  ff_update_link_current_pts(link, pts);
1073  return ret;
1074 }
1075 
1077 {
1078  int insamples = frame->nb_samples, inpos = 0, nb_samples;
1079  AVFrame *pbuf = link->partial_buf;
1080  int nb_channels = av_frame_get_channels(frame);
1081  int ret = 0;
1082 
1084  /* Handle framing (min_samples, max_samples) */
1085  while (insamples) {
1086  if (!pbuf) {
1087  AVRational samples_tb = { 1, link->sample_rate };
1088  pbuf = ff_get_audio_buffer(link, link->partial_buf_size);
1089  if (!pbuf) {
1090  av_log(link->dst, AV_LOG_WARNING,
1091  "Samples dropped due to memory allocation failure.\n");
1092  return 0;
1093  }
1094  av_frame_copy_props(pbuf, frame);
1095  pbuf->pts = frame->pts;
1096  if (pbuf->pts != AV_NOPTS_VALUE)
1097  pbuf->pts += av_rescale_q(inpos, samples_tb, link->time_base);
1098  pbuf->nb_samples = 0;
1099  }
1100  nb_samples = FFMIN(insamples,
1101  link->partial_buf_size - pbuf->nb_samples);
1103  pbuf->nb_samples, inpos,
1104  nb_samples, nb_channels, link->format);
1105  inpos += nb_samples;
1106  insamples -= nb_samples;
1107  pbuf->nb_samples += nb_samples;
1108  if (pbuf->nb_samples >= link->min_samples) {
1109  ret = ff_filter_frame_framed(link, pbuf);
1110  pbuf = NULL;
1111  }
1112  }
1113  av_frame_free(&frame);
1114  link->partial_buf = pbuf;
1115  return ret;
1116 }
1117 
1119 {
1120  FF_TPRINTF_START(NULL, filter_frame); ff_tlog_link(NULL, link, 1); ff_tlog(NULL, " "); ff_tlog_ref(NULL, frame, 1);
1121 
1122  /* Consistency checks */
1123  if (link->type == AVMEDIA_TYPE_VIDEO) {
1124  if (strcmp(link->dst->filter->name, "scale")) {
1125  av_assert1(frame->format == link->format);
1126  av_assert1(frame->width == link->w);
1127  av_assert1(frame->height == link->h);
1128  }
1129  } else {
1130  av_assert1(frame->format == link->format);
1131  av_assert1(av_frame_get_channels(frame) == link->channels);
1132  av_assert1(frame->channel_layout == link->channel_layout);
1133  av_assert1(frame->sample_rate == link->sample_rate);
1134  }
1135 
1136  /* Go directly to actual filtering if possible */
1137  if (link->type == AVMEDIA_TYPE_AUDIO &&
1138  link->min_samples &&
1139  (link->partial_buf ||
1140  frame->nb_samples < link->min_samples ||
1141  frame->nb_samples > link->max_samples)) {
1142  return ff_filter_frame_needs_framing(link, frame);
1143  } else {
1144  return ff_filter_frame_framed(link, frame);
1145  }
1146 }
1147 
1149 {
1150  return &avfilter_class;
1151 }
const char * name
Definition: avisynth_c.h:675
int(* poll_frame)(AVFilterLink *link)
Frame poll callback.
Definition: internal.h:110
const char const char void * val
Definition: avisynth_c.h:671
void * av_calloc(size_t nmemb, size_t size) av_malloc_attrib
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:249
void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
Definition: avfilter.c:42
#define AVERROR_PATCHWELCOME
char * key
Definition: dict.h:81
void avfilter_link_set_closed(AVFilterLink *link, int closed)
Set the closed field of a link.
Definition: avfilter.c:177
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:592
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:1187
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:987
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
AVOption.
Definition: opt.h:253
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:692
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:693
const char * name
Filter name.
Definition: avfilter.h:468
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:1199
void * priv
private data for use by the filter
Definition: avfilter.h:648
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: avcodec.h:4153
int av_escape(char **dst, const char *src, const char *special_chars, enum AVEscapeMode mode, int flags)
Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed ...
Definition: avstring.c:271
#define LIBAVUTIL_VERSION_INT
Definition: avcodec.h:820
char * av_strdup(const char *s) av_malloc_attrib
Duplicate the string s.
Definition: mem.c:256
int(* init)(AVFilterContext *ctx)
Filter initialization function.
Definition: avfilter.h:538
void ff_channel_layouts_changeref(AVFilterChannelLayouts **oldref, AVFilterChannelLayouts **newref)
Definition: formats.c:477
AVDictionaryEntry * av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
Definition: opt.c:1064
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:982
int num
numerator
Definition: rational.h:44
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:140
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:1860
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
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:641
Use backslash escaping.
Definition: avstring.h:258
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:71
const AVFilter * avfilter_next(const AVFilter *prev)
Iterate over all registered filters.
Definition: avfilter.c:496
const char * name
Definition: opt.h:254
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
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:303
Pixel format.
Definition: avcodec.h:4533
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:382
int thread_type
Type of multithreading being allowed/used.
Definition: avfilter.h:668
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:680
#define FFMPEG_LICENSE
Definition: config.h:5
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:622
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic &quot;enable&quot; expression option that can be used to enable or disable a fil...
Definition: avfilter.h:445
const char * name
Pad name.
Definition: internal.h:66
int priv_size
size of private data to allocate for the filter
Definition: avfilter.h:589
static uint8_t * res
Definition: ffhash.c:43
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1118
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:128
uint8_t
const AVFilterPad * inputs
List of inputs, terminated by a zeroed element.
Definition: avfilter.h:484
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:119
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:55
static const uint8_t offset[511][2]
Definition: vf_uspp.c:58
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only &quot;metadata&quot; fields from src to dst.
Definition: frame.c:446
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:182
const AVFilterPad * outputs
List of outputs, terminated by a zeroed element.
Definition: avfilter.h:492
Definition: eval.c:141
int flags
A combination of AVFILTER_FLAG_*.
Definition: avfilter.h:507
void ff_command_queue_pop(AVFilterContext *filter)
Definition: avfilter.c:87
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:69
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:219
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:82
#define AV_LOG_VERBOSE
Detailed information.
Definition: avcodec.h:4163
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:293
void(* uninit)(AVFilterContext *ctx)
Filter uninitialization function.
Definition: avfilter.h:563
static void copy(LZOContext *c, int cnt)
Copies bytes from input to output buffer with checking.
Definition: lzo.c:79
#define av_uninit(x)
Definition: avcodec.h:720
static void free_link(AVFilterLink *link)
Definition: avfilter.c:674
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:609
const OptionDef options[]
Definition: ffserver.c:4682
const AVOption * av_opt_next(void *obj, const AVOption *prev)
Iterate over all AVOptions belonging to obj.
Definition: opt.c:64
static AVFrame * frame
Definition: demuxing.c:51
A filter pad used for either input or output.
Definition: internal.h:60
void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
Definition: avfilter.c:427
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:289
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:130
static const AVClass avfilter_class
Definition: avfilter.c:569
#define av_err2str(errnum)
#define LIBAVFILTER_VERSION_MICRO
Definition: version.h:34
int width
width and height of the video frame
Definition: frame.h:145
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
void ff_formats_changeref(AVFilterFormats **oldref, AVFilterFormats **newref)
Before After |formats |&lt;------—.
Definition: formats.c:483
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:219
Frame requests may need to loop in order to be fulfilled.
Definition: internal.h:347
#define avpriv_atomic_ptr_cas
Definition: atomic_gcc.h:48
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:1141
static const char * default_filter_name(void *filter_ctx)
Definition: avfilter.c:524
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
int avfilter_link_get_channels(AVFilterLink *link)
Get the number of channels of a link.
Definition: avfilter.c:172
unsigned nb_outputs
number of output pads
Definition: avfilter.h:646
unsigned avfilter_version(void)
Return the LIBAVFILTER_VERSION_INT constant.
Definition: avfilter.c:70
const char * r
Definition: vf_curves.c:103
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:436
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: avcodec.h:4168
int(* filter_frame)(AVFilterLink *link, AVFrame *frame)
Filtering callback.
Definition: internal.h:99
void av_dict_free(AVDictionary **m)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:162
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
const char * arg
Definition: jacosubdec.c:69
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:551
double * var_values
variable values for the enable expression
Definition: avfilter.h:679
#define FF_TPRINTF_START(ctx, func)
Definition: internal.h:230
int av_frame_get_channels(const AVFrame *frame)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:123
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:225
#define av_unused
Disable warnings about deprecated features This is useful for sections of code kept for backward comp...
Definition: avcodec.h:697
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:257
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:354
goto fail
Definition: avfilter.c:963
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:70
common internal API header
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
Definition: mpegaudioenc.c:312
static void * filter_child_next(void *obj, void *prev)
Definition: avfilter.c:530
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:167
char * name
name of this filter instance
Definition: avfilter.h:632
unsigned nb_inputs
number of input pads
Definition: avfilter.h:639
char * enable_str
enable expression string
Definition: avfilter.h:677
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:540
static AVFilter * first_filter
Definition: avfilter.c:458
struct AVFilterCommand * next
Definition: internal.h:48
ret
Definition: avfilter.c:961
static const AVOption avfilter_options[]
Definition: avfilter.c:561
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:630
void * av_malloc(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:73
#define ff_tlog(pctx,...)
Definition: internal.h:227
#define FFMIN(a, b)
Definition: avcodec.h:925
struct AVFilter * next
Used by the filter registration system.
Definition: avfilter.h:595
const AVClass * av_class
needed for av_log() and filters common options
Definition: avfilter.h:628
static int ff_filter_frame_needs_framing(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1076
void * enable
parsed expression (AVExpr*)
Definition: avfilter.h:678
#define LIBAVFILTER_VERSION_INT
Definition: version.h:36
int(* init_opaque)(AVFilterContext *ctx, void *opaque)
Filter initialization function, alternative to the init() callback.
Definition: avfilter.h:616
Accept to parse a value without a key; the key will then be returned as NULL.
Definition: opt.h:513
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:203
int avfilter_init_str(AVFilterContext *ctx, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:855
Main libavfilter public API header.
struct AVOption * option
a pointer to the first option specified in the class if any or NULL
Definition: log.h:68
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:642
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:182
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:157
#define AV_LOG_INFO
Standard information.
Definition: avcodec.h:4158
AVS_Value src
Definition: avisynth_c.h:523
const AVClass * avfilter_get_class(void)
Definition: avfilter.c:1148
int offset
The offset relative to the context structure where the option value is stored.
Definition: opt.h:266
void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
Definition: avfilter.c:311
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avcodec.h:2290
int av_opt_set_dict(void *obj, struct AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1326
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:634
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:1347
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:177
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:459
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:437
void * buf
Definition: avisynth_c.h:594
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:366
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:62
#define AVERROR_OPTION_NOT_FOUND
double value
Definition: eval.c:83
Describe the class of an AVClass context structure.
Definition: log.h:50
int sample_rate
Sample rate of the audio data.
Definition: frame.h:349
Filter definition.
Definition: avfilter.h:464
static const char *const var_names[]
Definition: avfilter.c:384
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:635
rational number numerator/denominator
Definition: rational.h:43
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:70
AVMediaType
Definition: avutil.h:180
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:454
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
#define FLAGS
Definition: avfilter.c:560
#define LICENSE_PREFIX
AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:460
const char * avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
Get the name of an AVFilterPad.
Definition: avfilter.c:977
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define OFFSET(x)
Definition: avfilter.c:559
static const int8_t filt[NUMTAPS]
Definition: af_earwax.c:39
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:673
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:579
static int flags
Definition: cpu.c:45
#define AVERROR_EOF
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
Initialize a filter with the supplied dictionary of options.
Definition: avfilter.c:818
const char * avfilter_license(void)
Return the libavfilter license.
Definition: avfilter.c:81
void av_opt_free(void *obj)
Free all string and binary options in obj.
Definition: opt.c:1318
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
Definition: avfilter.c:387
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:78
#define AVFILTER_FLAG_SUPPORT_TIMELINE
Handy mask to test whether the filter supports or no the timeline feature (internally or generically)...
Definition: avfilter.h:458
static double c[64]
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:650
#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:549
int den
denominator
Definition: rational.h:45
avfilter_execute_func * execute
Definition: internal.h:153
static int filter_frame(AVFilterLink *inlink, AVFrame *insamplesref)
Definition: af_aconvert.c:146
#define FFMPEG_CONFIGURATION
Definition: config.h:4
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
Definition: avfiltergraph.c:95
avfilter_execute_func * thread_execute
Definition: internal.h:149
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
int avfilter_register(AVFilter *filter)
Register a filter.
Definition: avfilter.c:474
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:298
enum AVOptionType type
Definition: opt.h:267
#define NAN
Definition: math.h:28
const AVClass * priv_class
A class for the private data, used to declare filter private AVOptions.
Definition: avfilter.h:502
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){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));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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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);ff_audio_convert_init_arm(ac);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_dlog(ac->avr,"%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
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:1244
const char * avfilter_configuration(void)
Return the libavfilter build-time configuration.
Definition: avfilter.c:76
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:641
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:992
int key_frame
1 -&gt; keyframe, 0-&gt; not
Definition: frame.h:162
struct AVFilterCommand * command_queue
Definition: avfilter.h:675
#define AVERROR(e)
An instance of a filter.
Definition: avfilter.h:627
int avfilter_pad_count(const AVFilterPad *pads)
Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
Definition: avfilter.c:512
static int request_frame(AVFilterLink *outlink)
Definition: af_adelay.c:213
int height
Definition: frame.h:145
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:96
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:135
void INT64 INT64 count
Definition: avisynth_c.h:594
#define AV_DICT_IGNORE_SUFFIX
Definition: dict.h:68
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
double time
time expressed in seconds
Definition: internal.h:44
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:335
int nb_channels
static const AVClass * filter_child_class_next(const AVClass *prev)
Definition: avfilter.c:538
internal API functions
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:366
float min
void avfilter_link_free(AVFilterLink **link)
Free the link in *link, and set its pointer to NULL.
Definition: avfilter.c:162
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:255
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:150
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...) av_printf_format(3
Append output to a string, according to a format.
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avcodec.h:2278
char * command
command
Definition: internal.h:45
void * av_mallocz(size_t size) av_malloc_attrib 1(1)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:241
static int process_options(AVFilterContext *ctx, AVDictionary **options, const char *args)
Definition: avfilter.c:733
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.
char * arg
optional argument for the command
Definition: internal.h:46