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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 #define FF_INTERNAL_FIELDS 1
38 #include "framequeue.h"
39 
40 #include "audio.h"
41 #include "avfilter.h"
42 #include "filters.h"
43 #include "formats.h"
44 #include "internal.h"
45 
46 #include "libavutil/ffversion.h"
47 const char av_filter_ffversion[] = "FFmpeg version " FFMPEG_VERSION;
48 
49 void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
50 {
51  av_unused char buf[16];
52  ff_tlog(ctx,
53  "ref[%p buf:%p data:%p linesize[%d, %d, %d, %d] pts:%"PRId64" pos:%"PRId64,
54  ref, ref->buf, ref->data[0],
55  ref->linesize[0], ref->linesize[1], ref->linesize[2], ref->linesize[3],
56  ref->pts, ref->pkt_pos);
57 
58  if (ref->width) {
59  ff_tlog(ctx, " a:%d/%d s:%dx%d i:%c iskey:%d type:%c",
61  ref->width, ref->height,
62  !ref->interlaced_frame ? 'P' : /* Progressive */
63  ref->top_field_first ? 'T' : 'B', /* Top / Bottom */
64  ref->key_frame,
66  }
67  if (ref->nb_samples) {
68  ff_tlog(ctx, " cl:%"PRId64"d n:%d r:%d",
69  ref->channel_layout,
70  ref->nb_samples,
71  ref->sample_rate);
72  }
73 
74  ff_tlog(ctx, "]%s", end ? "\n" : "");
75 }
76 
77 unsigned avfilter_version(void)
78 {
81 }
82 
83 const char *avfilter_configuration(void)
84 {
85  return FFMPEG_CONFIGURATION;
86 }
87 
88 const char *avfilter_license(void)
89 {
90 #define LICENSE_PREFIX "libavfilter license: "
91  return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
92 }
93 
95 {
97  av_freep(&c->arg);
98  av_freep(&c->command);
99  filter->command_queue= c->next;
100  av_free(c);
101 }
102 
103 int ff_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
104  AVFilterPad **pads, AVFilterLink ***links,
105  AVFilterPad *newpad)
106 {
107  AVFilterLink **newlinks;
108  AVFilterPad *newpads;
109  unsigned i;
110 
111  idx = FFMIN(idx, *count);
112 
113  newpads = av_realloc_array(*pads, *count + 1, sizeof(AVFilterPad));
114  newlinks = av_realloc_array(*links, *count + 1, sizeof(AVFilterLink*));
115  if (newpads)
116  *pads = newpads;
117  if (newlinks)
118  *links = newlinks;
119  if (!newpads || !newlinks)
120  return AVERROR(ENOMEM);
121 
122  memmove(*pads + idx + 1, *pads + idx, sizeof(AVFilterPad) * (*count - idx));
123  memmove(*links + idx + 1, *links + idx, sizeof(AVFilterLink*) * (*count - idx));
124  memcpy(*pads + idx, newpad, sizeof(AVFilterPad));
125  (*links)[idx] = NULL;
126 
127  (*count)++;
128  for (i = idx + 1; i < *count; i++)
129  if ((*links)[i])
130  (*(unsigned *)((uint8_t *) (*links)[i] + padidx_off))++;
131 
132  return 0;
133 }
134 
135 int avfilter_link(AVFilterContext *src, unsigned srcpad,
136  AVFilterContext *dst, unsigned dstpad)
137 {
138  AVFilterLink *link;
139 
140  av_assert0(src->graph);
141  av_assert0(dst->graph);
142  av_assert0(src->graph == dst->graph);
143 
144  if (src->nb_outputs <= srcpad || dst->nb_inputs <= dstpad ||
145  src->outputs[srcpad] || dst->inputs[dstpad])
146  return AVERROR(EINVAL);
147 
148  if (src->output_pads[srcpad].type != dst->input_pads[dstpad].type) {
149  av_log(src, AV_LOG_ERROR,
150  "Media type mismatch between the '%s' filter output pad %d (%s) and the '%s' filter input pad %d (%s)\n",
151  src->name, srcpad, (char *)av_x_if_null(av_get_media_type_string(src->output_pads[srcpad].type), "?"),
152  dst->name, dstpad, (char *)av_x_if_null(av_get_media_type_string(dst-> input_pads[dstpad].type), "?"));
153  return AVERROR(EINVAL);
154  }
155 
156  link = av_mallocz(sizeof(*link));
157  if (!link)
158  return AVERROR(ENOMEM);
159 
160  src->outputs[srcpad] = dst->inputs[dstpad] = link;
161 
162  link->src = src;
163  link->dst = dst;
164  link->srcpad = &src->output_pads[srcpad];
165  link->dstpad = &dst->input_pads[dstpad];
166  link->type = src->output_pads[srcpad].type;
168  link->format = -1;
169  ff_framequeue_init(&link->fifo, &src->graph->internal->frame_queues);
170 
171  return 0;
172 }
173 
175 {
176  if (!*link)
177  return;
178 
179  av_frame_free(&(*link)->partial_buf);
180  ff_framequeue_free(&(*link)->fifo);
181  ff_frame_pool_uninit((FFFramePool**)&(*link)->frame_pool);
182 
183  av_freep(link);
184 }
185 
187 {
188  return link->channels;
189 }
190 
191 void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
192 {
193  filter->ready = FFMAX(filter->ready, priority);
194 }
195 
196 /**
197  * Clear frame_blocked_in on all outputs.
198  * This is necessary whenever something changes on input.
199  */
201 {
202  unsigned i;
203 
204  for (i = 0; i < filter->nb_outputs; i++)
205  filter->outputs[i]->frame_blocked_in = 0;
206 }
207 
208 
209 void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
210 {
211  if (link->status_in == status)
212  return;
213  av_assert0(!link->status_in);
214  link->status_in = status;
215  link->status_in_pts = pts;
216  link->frame_wanted_out = 0;
217  link->frame_blocked_in = 0;
218  filter_unblock(link->dst);
219  ff_filter_set_ready(link->dst, 200);
220 }
221 
222 void ff_avfilter_link_set_out_status(AVFilterLink *link, int status, int64_t pts)
223 {
225  av_assert0(!link->status_out);
226  link->status_out = status;
227  if (pts != AV_NOPTS_VALUE)
228  ff_update_link_current_pts(link, pts);
229  filter_unblock(link->dst);
230  ff_filter_set_ready(link->src, 200);
231 }
232 
233 void avfilter_link_set_closed(AVFilterLink *link, int closed)
234 {
236 }
237 
239  unsigned filt_srcpad_idx, unsigned filt_dstpad_idx)
240 {
241  int ret;
242  unsigned dstpad_idx = link->dstpad - link->dst->input_pads;
243 
244  av_log(link->dst, AV_LOG_VERBOSE, "auto-inserting filter '%s' "
245  "between the filter '%s' and the filter '%s'\n",
246  filt->name, link->src->name, link->dst->name);
247 
248  link->dst->inputs[dstpad_idx] = NULL;
249  if ((ret = avfilter_link(filt, filt_dstpad_idx, link->dst, dstpad_idx)) < 0) {
250  /* failed to link output filter to new filter */
251  link->dst->inputs[dstpad_idx] = link;
252  return ret;
253  }
254 
255  /* re-hookup the link to the new destination filter we inserted */
256  link->dst = filt;
257  link->dstpad = &filt->input_pads[filt_srcpad_idx];
258  filt->inputs[filt_srcpad_idx] = link;
259 
260  /* if any information on supported media formats already exists on the
261  * link, we need to preserve that */
262  if (link->out_formats)
264  &filt->outputs[filt_dstpad_idx]->out_formats);
265  if (link->out_samplerates)
267  &filt->outputs[filt_dstpad_idx]->out_samplerates);
268  if (link->out_channel_layouts)
270  &filt->outputs[filt_dstpad_idx]->out_channel_layouts);
271 
272  return 0;
273 }
274 
276 {
277  int (*config_link)(AVFilterLink *);
278  unsigned i;
279  int ret;
280 
281  for (i = 0; i < filter->nb_inputs; i ++) {
282  AVFilterLink *link = filter->inputs[i];
283  AVFilterLink *inlink;
284 
285  if (!link) continue;
286  if (!link->src || !link->dst) {
287  av_log(filter, AV_LOG_ERROR,
288  "Not all input and output are properly linked (%d).\n", i);
289  return AVERROR(EINVAL);
290  }
291 
292  inlink = link->src->nb_inputs ? link->src->inputs[0] : NULL;
293  link->current_pts =
295 
296  switch (link->init_state) {
297  case AVLINK_INIT:
298  continue;
299  case AVLINK_STARTINIT:
300  av_log(filter, AV_LOG_INFO, "circular filter chain detected\n");
301  return 0;
302  case AVLINK_UNINIT:
303  link->init_state = AVLINK_STARTINIT;
304 
305  if ((ret = avfilter_config_links(link->src)) < 0)
306  return ret;
307 
308  if (!(config_link = link->srcpad->config_props)) {
309  if (link->src->nb_inputs != 1) {
310  av_log(link->src, AV_LOG_ERROR, "Source filters and filters "
311  "with more than one input "
312  "must set config_props() "
313  "callbacks on all outputs\n");
314  return AVERROR(EINVAL);
315  }
316  } else if ((ret = config_link(link)) < 0) {
317  av_log(link->src, AV_LOG_ERROR,
318  "Failed to configure output pad on %s\n",
319  link->src->name);
320  return ret;
321  }
322 
323  switch (link->type) {
324  case AVMEDIA_TYPE_VIDEO:
325  if (!link->time_base.num && !link->time_base.den)
326  link->time_base = inlink ? inlink->time_base : AV_TIME_BASE_Q;
327 
328  if (!link->sample_aspect_ratio.num && !link->sample_aspect_ratio.den)
329  link->sample_aspect_ratio = inlink ?
330  inlink->sample_aspect_ratio : (AVRational){1,1};
331 
332  if (inlink) {
333  if (!link->frame_rate.num && !link->frame_rate.den)
334  link->frame_rate = inlink->frame_rate;
335  if (!link->w)
336  link->w = inlink->w;
337  if (!link->h)
338  link->h = inlink->h;
339  } else if (!link->w || !link->h) {
340  av_log(link->src, AV_LOG_ERROR,
341  "Video source filters must set their output link's "
342  "width and height\n");
343  return AVERROR(EINVAL);
344  }
345  break;
346 
347  case AVMEDIA_TYPE_AUDIO:
348  if (inlink) {
349  if (!link->time_base.num && !link->time_base.den)
350  link->time_base = inlink->time_base;
351  }
352 
353  if (!link->time_base.num && !link->time_base.den)
354  link->time_base = (AVRational) {1, link->sample_rate};
355  }
356 
357  if (link->src->nb_inputs && link->src->inputs[0]->hw_frames_ctx &&
359  av_assert0(!link->hw_frames_ctx &&
360  "should not be set by non-hwframe-aware filter");
361  link->hw_frames_ctx = av_buffer_ref(link->src->inputs[0]->hw_frames_ctx);
362  if (!link->hw_frames_ctx)
363  return AVERROR(ENOMEM);
364  }
365 
366  if ((config_link = link->dstpad->config_props))
367  if ((ret = config_link(link)) < 0) {
368  av_log(link->dst, AV_LOG_ERROR,
369  "Failed to configure input pad on %s\n",
370  link->dst->name);
371  return ret;
372  }
373 
374  link->init_state = AVLINK_INIT;
375  }
376  }
377 
378  return 0;
379 }
380 
381 void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
382 {
383  if (link->type == AVMEDIA_TYPE_VIDEO) {
384  ff_tlog(ctx,
385  "link[%p s:%dx%d fmt:%s %s->%s]%s",
386  link, link->w, link->h,
388  link->src ? link->src->filter->name : "",
389  link->dst ? link->dst->filter->name : "",
390  end ? "\n" : "");
391  } else {
392  char buf[128];
393  av_get_channel_layout_string(buf, sizeof(buf), -1, link->channel_layout);
394 
395  ff_tlog(ctx,
396  "link[%p r:%d cl:%s fmt:%s %s->%s]%s",
397  link, (int)link->sample_rate, buf,
399  link->src ? link->src->filter->name : "",
400  link->dst ? link->dst->filter->name : "",
401  end ? "\n" : "");
402  }
403 }
404 
406 {
408 
409  av_assert1(!link->dst->filter->activate);
410  if (link->status_out)
411  return link->status_out;
412  if (link->status_in) {
413  if (ff_framequeue_queued_frames(&link->fifo)) {
415  av_assert1(link->dst->ready >= 300);
416  return 0;
417  } else {
418  /* Acknowledge status change. Filters using ff_request_frame() will
419  handle the change automatically. Filters can also check the
420  status directly but none do yet. */
421  ff_avfilter_link_set_out_status(link, link->status_in, link->status_in_pts);
422  return link->status_out;
423  }
424  }
425  link->frame_wanted_out = 1;
426  ff_filter_set_ready(link->src, 100);
427  return 0;
428 }
429 
430 static int64_t guess_status_pts(AVFilterContext *ctx, int status, AVRational link_time_base)
431 {
432  unsigned i;
433  int64_t r = INT64_MAX;
434 
435  for (i = 0; i < ctx->nb_inputs; i++)
436  if (ctx->inputs[i]->status_out == status)
437  r = FFMIN(r, av_rescale_q(ctx->inputs[i]->current_pts, ctx->inputs[i]->time_base, link_time_base));
438  if (r < INT64_MAX)
439  return r;
440  av_log(ctx, AV_LOG_WARNING, "EOF timestamp not reliable\n");
441  for (i = 0; i < ctx->nb_inputs; i++)
442  r = FFMIN(r, av_rescale_q(ctx->inputs[i]->status_in_pts, ctx->inputs[i]->time_base, link_time_base));
443  if (r < INT64_MAX)
444  return r;
445  return AV_NOPTS_VALUE;
446 }
447 
449 {
450  int ret = -1;
451 
452  FF_TPRINTF_START(NULL, request_frame_to_filter); ff_tlog_link(NULL, link, 1);
453  /* Assume the filter is blocked, let the method clear it if not */
454  link->frame_blocked_in = 1;
455  if (link->srcpad->request_frame)
456  ret = link->srcpad->request_frame(link);
457  else if (link->src->inputs[0])
458  ret = ff_request_frame(link->src->inputs[0]);
459  if (ret < 0) {
460  if (ret != AVERROR(EAGAIN) && ret != link->status_in)
461  ff_avfilter_link_set_in_status(link, ret, guess_status_pts(link->src, ret, link->time_base));
462  if (ret == AVERROR_EOF)
463  ret = 0;
464  }
465  return ret;
466 }
467 
469 {
470  int i, min = INT_MAX;
471 
472  if (link->srcpad->poll_frame)
473  return link->srcpad->poll_frame(link);
474 
475  for (i = 0; i < link->src->nb_inputs; i++) {
476  int val;
477  if (!link->src->inputs[i])
478  return AVERROR(EINVAL);
479  val = ff_poll_frame(link->src->inputs[i]);
480  min = FFMIN(min, val);
481  }
482 
483  return min;
484 }
485 
486 static const char *const var_names[] = {
487  "t",
488  "n",
489  "pos",
490  "w",
491  "h",
492  NULL
493 };
494 
495 enum {
502 };
503 
504 static int set_enable_expr(AVFilterContext *ctx, const char *expr)
505 {
506  int ret;
507  char *expr_dup;
508  AVExpr *old = ctx->enable;
509 
511  av_log(ctx, AV_LOG_ERROR, "Timeline ('enable' option) not supported "
512  "with filter '%s'\n", ctx->filter->name);
513  return AVERROR_PATCHWELCOME;
514  }
515 
516  expr_dup = av_strdup(expr);
517  if (!expr_dup)
518  return AVERROR(ENOMEM);
519 
520  if (!ctx->var_values) {
521  ctx->var_values = av_calloc(VAR_VARS_NB, sizeof(*ctx->var_values));
522  if (!ctx->var_values) {
523  av_free(expr_dup);
524  return AVERROR(ENOMEM);
525  }
526  }
527 
528  ret = av_expr_parse((AVExpr**)&ctx->enable, expr_dup, var_names,
529  NULL, NULL, NULL, NULL, 0, ctx->priv);
530  if (ret < 0) {
531  av_log(ctx->priv, AV_LOG_ERROR,
532  "Error when evaluating the expression '%s' for enable\n",
533  expr_dup);
534  av_free(expr_dup);
535  return ret;
536  }
537 
538  av_expr_free(old);
539  av_free(ctx->enable_str);
540  ctx->enable_str = expr_dup;
541  return 0;
542 }
543 
545 {
546  if (pts == AV_NOPTS_VALUE)
547  return;
548  link->current_pts = pts;
550  /* TODO use duration */
551  if (link->graph && link->age_index >= 0)
553 }
554 
555 int avfilter_process_command(AVFilterContext *filter, const char *cmd, const char *arg, char *res, int res_len, int flags)
556 {
557  if(!strcmp(cmd, "ping")){
558  char local_res[256] = {0};
559 
560  if (!res) {
561  res = local_res;
562  res_len = sizeof(local_res);
563  }
564  av_strlcatf(res, res_len, "pong from:%s %s\n", filter->filter->name, filter->name);
565  if (res == local_res)
566  av_log(filter, AV_LOG_INFO, "%s", res);
567  return 0;
568  }else if(!strcmp(cmd, "enable")) {
569  return set_enable_expr(filter, arg);
570  }else if(filter->filter->process_command) {
571  return filter->filter->process_command(filter, cmd, arg, res, res_len, flags);
572  }
573  return AVERROR(ENOSYS);
574 }
575 
578 
579 const AVFilter *avfilter_get_by_name(const char *name)
580 {
581  const AVFilter *f = NULL;
582 
583  if (!name)
584  return NULL;
585 
586  while ((f = avfilter_next(f)))
587  if (!strcmp(f->name, name))
588  return (AVFilter *)f;
589 
590  return NULL;
591 }
592 
594 {
595  AVFilter **f = last_filter;
596 
597  /* the filter must select generic or internal exclusively */
599 
600  filter->next = NULL;
601 
602  while(*f || avpriv_atomic_ptr_cas((void * volatile *)f, NULL, filter))
603  f = &(*f)->next;
604  last_filter = &filter->next;
605 
606  return 0;
607 }
608 
609 const AVFilter *avfilter_next(const AVFilter *prev)
610 {
611  return prev ? prev->next : first_filter;
612 }
613 
615 {
616  int count;
617 
618  if (!pads)
619  return 0;
620 
621  for (count = 0; pads->name; count++)
622  pads++;
623  return count;
624 }
625 
626 static const char *default_filter_name(void *filter_ctx)
627 {
629  return ctx->name ? ctx->name : ctx->filter->name;
630 }
631 
632 static void *filter_child_next(void *obj, void *prev)
633 {
634  AVFilterContext *ctx = obj;
635  if (!prev && ctx->filter && ctx->filter->priv_class && ctx->priv)
636  return ctx->priv;
637  return NULL;
638 }
639 
640 static const AVClass *filter_child_class_next(const AVClass *prev)
641 {
642  const AVFilter *f = NULL;
643 
644  /* find the filter that corresponds to prev */
645  while (prev && (f = avfilter_next(f)))
646  if (f->priv_class == prev)
647  break;
648 
649  /* could not find filter corresponding to prev */
650  if (prev && !f)
651  return NULL;
652 
653  /* find next filter with specific options */
654  while ((f = avfilter_next(f)))
655  if (f->priv_class)
656  return f->priv_class;
657 
658  return NULL;
659 }
660 
661 #define OFFSET(x) offsetof(AVFilterContext, x)
662 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM
663 static const AVOption avfilter_options[] = {
664  { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
665  { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
666  { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .unit = "thread_type" },
667  { "enable", "set enable expression", OFFSET(enable_str), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
668  { "threads", "Allowed number of threads", OFFSET(nb_threads), AV_OPT_TYPE_INT,
669  { .i64 = 0 }, 0, INT_MAX, FLAGS },
670  { NULL },
671 };
672 
673 static const AVClass avfilter_class = {
674  .class_name = "AVFilter",
675  .item_name = default_filter_name,
676  .version = LIBAVUTIL_VERSION_INT,
677  .category = AV_CLASS_CATEGORY_FILTER,
678  .child_next = filter_child_next,
679  .child_class_next = filter_child_class_next,
681 };
682 
684  int *ret, int nb_jobs)
685 {
686  int i;
687 
688  for (i = 0; i < nb_jobs; i++) {
689  int r = func(ctx, arg, i, nb_jobs);
690  if (ret)
691  ret[i] = r;
692  }
693  return 0;
694 }
695 
696 AVFilterContext *ff_filter_alloc(const AVFilter *filter, const char *inst_name)
697 {
698  AVFilterContext *ret;
699  int preinited = 0;
700 
701  if (!filter)
702  return NULL;
703 
704  ret = av_mallocz(sizeof(AVFilterContext));
705  if (!ret)
706  return NULL;
707 
708  ret->av_class = &avfilter_class;
709  ret->filter = filter;
710  ret->name = inst_name ? av_strdup(inst_name) : NULL;
711  if (filter->priv_size) {
712  ret->priv = av_mallocz(filter->priv_size);
713  if (!ret->priv)
714  goto err;
715  }
716  if (filter->preinit) {
717  if (filter->preinit(ret) < 0)
718  goto err;
719  preinited = 1;
720  }
721 
722  av_opt_set_defaults(ret);
723  if (filter->priv_class) {
724  *(const AVClass**)ret->priv = filter->priv_class;
726  }
727 
728  ret->internal = av_mallocz(sizeof(*ret->internal));
729  if (!ret->internal)
730  goto err;
732 
733  ret->nb_inputs = avfilter_pad_count(filter->inputs);
734  if (ret->nb_inputs ) {
735  ret->input_pads = av_malloc_array(ret->nb_inputs, sizeof(AVFilterPad));
736  if (!ret->input_pads)
737  goto err;
738  memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad) * ret->nb_inputs);
739  ret->inputs = av_mallocz_array(ret->nb_inputs, sizeof(AVFilterLink*));
740  if (!ret->inputs)
741  goto err;
742  }
743 
744  ret->nb_outputs = avfilter_pad_count(filter->outputs);
745  if (ret->nb_outputs) {
746  ret->output_pads = av_malloc_array(ret->nb_outputs, sizeof(AVFilterPad));
747  if (!ret->output_pads)
748  goto err;
749  memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad) * ret->nb_outputs);
750  ret->outputs = av_mallocz_array(ret->nb_outputs, sizeof(AVFilterLink*));
751  if (!ret->outputs)
752  goto err;
753  }
754 
755  return ret;
756 
757 err:
758  if (preinited)
759  filter->uninit(ret);
760  av_freep(&ret->inputs);
761  av_freep(&ret->input_pads);
762  ret->nb_inputs = 0;
763  av_freep(&ret->outputs);
764  av_freep(&ret->output_pads);
765  ret->nb_outputs = 0;
766  av_freep(&ret->priv);
767  av_freep(&ret->internal);
768  av_free(ret);
769  return NULL;
770 }
771 
772 static void free_link(AVFilterLink *link)
773 {
774  if (!link)
775  return;
776 
777  if (link->src)
778  link->src->outputs[link->srcpad - link->src->output_pads] = NULL;
779  if (link->dst)
780  link->dst->inputs[link->dstpad - link->dst->input_pads] = NULL;
781 
783 
790  avfilter_link_free(&link);
791 }
792 
794 {
795  int i;
796 
797  if (!filter)
798  return;
799 
800  if (filter->graph)
801  ff_filter_graph_remove_filter(filter->graph, filter);
802 
803  if (filter->filter->uninit)
804  filter->filter->uninit(filter);
805 
806  for (i = 0; i < filter->nb_inputs; i++) {
807  free_link(filter->inputs[i]);
808  }
809  for (i = 0; i < filter->nb_outputs; i++) {
810  free_link(filter->outputs[i]);
811  }
812 
813  if (filter->filter->priv_class)
814  av_opt_free(filter->priv);
815 
816  av_buffer_unref(&filter->hw_device_ctx);
817 
818  av_freep(&filter->name);
819  av_freep(&filter->input_pads);
820  av_freep(&filter->output_pads);
821  av_freep(&filter->inputs);
822  av_freep(&filter->outputs);
823  av_freep(&filter->priv);
824  while(filter->command_queue){
825  ff_command_queue_pop(filter);
826  }
827  av_opt_free(filter);
828  av_expr_free(filter->enable);
829  filter->enable = NULL;
830  av_freep(&filter->var_values);
831  av_freep(&filter->internal);
832  av_free(filter);
833 }
834 
836 {
837  if (ctx->nb_threads > 0)
838  return FFMIN(ctx->nb_threads, ctx->graph->nb_threads);
839  return ctx->graph->nb_threads;
840 }
841 
843  const char *args)
844 {
845  const AVOption *o = NULL;
846  int ret, count = 0;
847  char *av_uninit(parsed_key), *av_uninit(value);
848  const char *key;
849  int offset= -1;
850 
851  if (!args)
852  return 0;
853 
854  while (*args) {
855  const char *shorthand = NULL;
856 
857  o = av_opt_next(ctx->priv, o);
858  if (o) {
859  if (o->type == AV_OPT_TYPE_CONST || o->offset == offset)
860  continue;
861  offset = o->offset;
862  shorthand = o->name;
863  }
864 
865  ret = av_opt_get_key_value(&args, "=", ":",
866  shorthand ? AV_OPT_FLAG_IMPLICIT_KEY : 0,
867  &parsed_key, &value);
868  if (ret < 0) {
869  if (ret == AVERROR(EINVAL))
870  av_log(ctx, AV_LOG_ERROR, "No option name near '%s'\n", args);
871  else
872  av_log(ctx, AV_LOG_ERROR, "Unable to parse '%s': %s\n", args,
873  av_err2str(ret));
874  return ret;
875  }
876  if (*args)
877  args++;
878  if (parsed_key) {
879  key = parsed_key;
880  while ((o = av_opt_next(ctx->priv, o))); /* discard all remaining shorthand */
881  } else {
882  key = shorthand;
883  }
884 
885  av_log(ctx, AV_LOG_DEBUG, "Setting '%s' to value '%s'\n", key, value);
886 
887  if (av_opt_find(ctx, key, NULL, 0, 0)) {
888  ret = av_opt_set(ctx, key, value, 0);
889  if (ret < 0) {
890  av_free(value);
891  av_free(parsed_key);
892  return ret;
893  }
894  } else {
895  av_dict_set(options, key, value, 0);
896  if ((ret = av_opt_set(ctx->priv, key, value, AV_OPT_SEARCH_CHILDREN)) < 0) {
898  if (ret == AVERROR_OPTION_NOT_FOUND)
899  av_log(ctx, AV_LOG_ERROR, "Option '%s' not found\n", key);
900  av_free(value);
901  av_free(parsed_key);
902  return ret;
903  }
904  }
905  }
906 
907  av_free(value);
908  av_free(parsed_key);
909  count++;
910  }
911 
912  if (ctx->enable_str) {
913  ret = set_enable_expr(ctx, ctx->enable_str);
914  if (ret < 0)
915  return ret;
916  }
917  return count;
918 }
919 
921 {
922  int ret = 0;
923 
924  ret = av_opt_set_dict(ctx, options);
925  if (ret < 0) {
926  av_log(ctx, AV_LOG_ERROR, "Error applying generic filter options.\n");
927  return ret;
928  }
929 
932  ctx->graph->internal->thread_execute) {
935  } else {
936  ctx->thread_type = 0;
937  }
938 
939  if (ctx->filter->priv_class) {
940  ret = av_opt_set_dict2(ctx->priv, options, AV_OPT_SEARCH_CHILDREN);
941  if (ret < 0) {
942  av_log(ctx, AV_LOG_ERROR, "Error applying options to the filter.\n");
943  return ret;
944  }
945  }
946 
947  if (ctx->filter->init_opaque)
948  ret = ctx->filter->init_opaque(ctx, NULL);
949  else if (ctx->filter->init)
950  ret = ctx->filter->init(ctx);
951  else if (ctx->filter->init_dict)
952  ret = ctx->filter->init_dict(ctx, options);
953 
954  return ret;
955 }
956 
958 {
961  int ret = 0;
962 
963  if (args && *args) {
964  if (!filter->filter->priv_class) {
965  av_log(filter, AV_LOG_ERROR, "This filter does not take any "
966  "options, but options were provided: %s.\n", args);
967  return AVERROR(EINVAL);
968  }
969 
970 #if FF_API_OLD_FILTER_OPTS_ERROR
971  if ( !strcmp(filter->filter->name, "format") ||
972  !strcmp(filter->filter->name, "noformat") ||
973  !strcmp(filter->filter->name, "frei0r") ||
974  !strcmp(filter->filter->name, "frei0r_src") ||
975  !strcmp(filter->filter->name, "ocv") ||
976  !strcmp(filter->filter->name, "pan") ||
977  !strcmp(filter->filter->name, "pp") ||
978  !strcmp(filter->filter->name, "aevalsrc")) {
979  /* a hack for compatibility with the old syntax
980  * replace colons with |s */
981  char *copy = av_strdup(args);
982  char *p = copy;
983  int nb_leading = 0; // number of leading colons to skip
984  int deprecated = 0;
985 
986  if (!copy) {
987  ret = AVERROR(ENOMEM);
988  goto fail;
989  }
990 
991  if (!strcmp(filter->filter->name, "frei0r") ||
992  !strcmp(filter->filter->name, "ocv"))
993  nb_leading = 1;
994  else if (!strcmp(filter->filter->name, "frei0r_src"))
995  nb_leading = 3;
996 
997  while (nb_leading--) {
998  p = strchr(p, ':');
999  if (!p) {
1000  p = copy + strlen(copy);
1001  break;
1002  }
1003  p++;
1004  }
1005 
1006  deprecated = strchr(p, ':') != NULL;
1007 
1008  if (!strcmp(filter->filter->name, "aevalsrc")) {
1009  deprecated = 0;
1010  while ((p = strchr(p, ':')) && p[1] != ':') {
1011  const char *epos = strchr(p + 1, '=');
1012  const char *spos = strchr(p + 1, ':');
1013  const int next_token_is_opt = epos && (!spos || epos < spos);
1014  if (next_token_is_opt) {
1015  p++;
1016  break;
1017  }
1018  /* next token does not contain a '=', assume a channel expression */
1019  deprecated = 1;
1020  *p++ = '|';
1021  }
1022  if (p && *p == ':') { // double sep '::' found
1023  deprecated = 1;
1024  memmove(p, p + 1, strlen(p));
1025  }
1026  } else
1027  while ((p = strchr(p, ':')))
1028  *p++ = '|';
1029 
1030  if (deprecated) {
1031  av_log(filter, AV_LOG_ERROR, "This syntax is deprecated. Use "
1032  "'|' to separate the list items ('%s' instead of '%s')\n",
1033  copy, args);
1034  ret = AVERROR(EINVAL);
1035  } else {
1036  ret = process_options(filter, &options, copy);
1037  }
1038  av_freep(&copy);
1039 
1040  if (ret < 0)
1041  goto fail;
1042  } else
1043 #endif
1044  {
1045  ret = process_options(filter, &options, args);
1046  if (ret < 0)
1047  goto fail;
1048  }
1049  }
1050 
1051  ret = avfilter_init_dict(filter, &options);
1052  if (ret < 0)
1053  goto fail;
1054 
1055  if ((e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
1056  av_log(filter, AV_LOG_ERROR, "No such option: %s.\n", e->key);
1058  goto fail;
1059  }
1060 
1061 fail:
1062  av_dict_free(&options);
1063 
1064  return ret;
1065 }
1066 
1067 const char *avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
1068 {
1069  return pads[pad_idx].name;
1070 }
1071 
1072 enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
1073 {
1074  return pads[pad_idx].type;
1075 }
1076 
1078 {
1079  return ff_filter_frame(link->dst->outputs[0], frame);
1080 }
1081 
1083 {
1085  AVFilterContext *dstctx = link->dst;
1086  AVFilterPad *dst = link->dstpad;
1087  int ret;
1088 
1089  if (!(filter_frame = dst->filter_frame))
1091 
1092  if (dst->needs_writable) {
1093  ret = ff_inlink_make_frame_writable(link, &frame);
1094  if (ret < 0)
1095  goto fail;
1096  }
1097 
1098  ff_inlink_process_commands(link, frame);
1099  dstctx->is_disabled = !ff_inlink_evaluate_timeline_at_frame(link, frame);
1100 
1101  if (dstctx->is_disabled &&
1104  ret = filter_frame(link, frame);
1105  link->frame_count_out++;
1106  return ret;
1107 
1108 fail:
1109  av_frame_free(&frame);
1110  return ret;
1111 }
1112 
1114 {
1115  int ret;
1117 
1118  /* Consistency checks */
1119  if (link->type == AVMEDIA_TYPE_VIDEO) {
1120  if (strcmp(link->dst->filter->name, "buffersink") &&
1121  strcmp(link->dst->filter->name, "format") &&
1122  strcmp(link->dst->filter->name, "idet") &&
1123  strcmp(link->dst->filter->name, "null") &&
1124  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  if (frame->format != link->format) {
1131  av_log(link->dst, AV_LOG_ERROR, "Format change is not supported\n");
1132  goto error;
1133  }
1134  if (frame->channels != link->channels) {
1135  av_log(link->dst, AV_LOG_ERROR, "Channel count change is not supported\n");
1136  goto error;
1137  }
1138  if (frame->channel_layout != link->channel_layout) {
1139  av_log(link->dst, AV_LOG_ERROR, "Channel layout change is not supported\n");
1140  goto error;
1141  }
1142  if (frame->sample_rate != link->sample_rate) {
1143  av_log(link->dst, AV_LOG_ERROR, "Sample rate change is not supported\n");
1144  goto error;
1145  }
1146  }
1147 
1148  link->frame_blocked_in = link->frame_wanted_out = 0;
1149  link->frame_count_in++;
1150  filter_unblock(link->dst);
1151  ret = ff_framequeue_add(&link->fifo, frame);
1152  if (ret < 0) {
1153  av_frame_free(&frame);
1154  return ret;
1155  }
1156  ff_filter_set_ready(link->dst, 300);
1157  return 0;
1158 
1159 error:
1160  av_frame_free(&frame);
1161  return AVERROR_PATCHWELCOME;
1162 }
1163 
1164 static int samples_ready(AVFilterLink *link, unsigned min)
1165 {
1166  return ff_framequeue_queued_frames(&link->fifo) &&
1167  (ff_framequeue_queued_samples(&link->fifo) >= min ||
1168  link->status_in);
1169 }
1170 
1171 static int take_samples(AVFilterLink *link, unsigned min, unsigned max,
1172  AVFrame **rframe)
1173 {
1174  AVFrame *frame0, *frame, *buf;
1175  unsigned nb_samples, nb_frames, i, p;
1176  int ret;
1177 
1178  /* Note: this function relies on no format changes and must only be
1179  called with enough samples. */
1180  av_assert1(samples_ready(link, link->min_samples));
1181  frame0 = frame = ff_framequeue_peek(&link->fifo, 0);
1182  if (!link->fifo.samples_skipped && frame->nb_samples >= min && frame->nb_samples <= max) {
1183  *rframe = ff_framequeue_take(&link->fifo);
1184  return 0;
1185  }
1186  nb_frames = 0;
1187  nb_samples = 0;
1188  while (1) {
1189  if (nb_samples + frame->nb_samples > max) {
1190  if (nb_samples < min)
1191  nb_samples = max;
1192  break;
1193  }
1194  nb_samples += frame->nb_samples;
1195  nb_frames++;
1196  if (nb_frames == ff_framequeue_queued_frames(&link->fifo))
1197  break;
1198  frame = ff_framequeue_peek(&link->fifo, nb_frames);
1199  }
1200 
1201  buf = ff_get_audio_buffer(link, nb_samples);
1202  if (!buf)
1203  return AVERROR(ENOMEM);
1204  ret = av_frame_copy_props(buf, frame0);
1205  if (ret < 0) {
1206  av_frame_free(&buf);
1207  return ret;
1208  }
1209  buf->pts = frame0->pts;
1210 
1211  p = 0;
1212  for (i = 0; i < nb_frames; i++) {
1213  frame = ff_framequeue_take(&link->fifo);
1214  av_samples_copy(buf->extended_data, frame->extended_data, p, 0,
1215  frame->nb_samples, link->channels, link->format);
1216  p += frame->nb_samples;
1217  av_frame_free(&frame);
1218  }
1219  if (p < nb_samples) {
1220  unsigned n = nb_samples - p;
1221  frame = ff_framequeue_peek(&link->fifo, 0);
1222  av_samples_copy(buf->extended_data, frame->extended_data, p, 0, n,
1223  link->channels, link->format);
1224  ff_framequeue_skip_samples(&link->fifo, n, link->time_base);
1225  }
1226 
1227  *rframe = buf;
1228  return 0;
1229 }
1230 
1232 {
1233  AVFrame *frame = NULL;
1234  AVFilterContext *dst = link->dst;
1235  int ret;
1236 
1238  ret = link->min_samples ?
1239  ff_inlink_consume_samples(link, link->min_samples, link->max_samples, &frame) :
1240  ff_inlink_consume_frame(link, &frame);
1241  av_assert1(ret);
1242  if (ret < 0) {
1243  av_assert1(!frame);
1244  return ret;
1245  }
1246  /* The filter will soon have received a new frame, that may allow it to
1247  produce one or more: unblock its outputs. */
1248  filter_unblock(dst);
1249  /* AVFilterPad.filter_frame() expect frame_count_out to have the value
1250  before the frame; ff_filter_frame_framed() will re-increment it. */
1251  link->frame_count_out--;
1252  ret = ff_filter_frame_framed(link, frame);
1253  if (ret < 0 && ret != link->status_out) {
1255  } else {
1256  /* Run once again, to see if several frames were available, or if
1257  the input status has also changed, or any other reason. */
1258  ff_filter_set_ready(dst, 300);
1259  }
1260  return ret;
1261 }
1262 
1264 {
1265  unsigned out = 0, progress = 0;
1266  int ret;
1267 
1268  av_assert0(!in->status_out);
1269  if (!filter->nb_outputs) {
1270  /* not necessary with the current API and sinks */
1271  return 0;
1272  }
1273  while (!in->status_out) {
1274  if (!filter->outputs[out]->status_in) {
1275  progress++;
1276  ret = ff_request_frame_to_filter(filter->outputs[out]);
1277  if (ret < 0)
1278  return ret;
1279  }
1280  if (++out == filter->nb_outputs) {
1281  if (!progress) {
1282  /* Every output already closed: input no longer interesting
1283  (example: overlay in shortest mode, other input closed). */
1284  ff_avfilter_link_set_out_status(in, in->status_in, in->status_in_pts);
1285  return 0;
1286  }
1287  progress = 0;
1288  out = 0;
1289  }
1290  }
1291  ff_filter_set_ready(filter, 200);
1292  return 0;
1293 }
1294 
1296 {
1297  unsigned i;
1298 
1299  for (i = 0; i < filter->nb_inputs; i++) {
1300  if (samples_ready(filter->inputs[i], filter->inputs[i]->min_samples)) {
1301  return ff_filter_frame_to_filter(filter->inputs[i]);
1302  }
1303  }
1304  for (i = 0; i < filter->nb_inputs; i++) {
1305  if (filter->inputs[i]->status_in && !filter->inputs[i]->status_out) {
1306  av_assert1(!ff_framequeue_queued_frames(&filter->inputs[i]->fifo));
1307  return forward_status_change(filter, filter->inputs[i]);
1308  }
1309  }
1310  for (i = 0; i < filter->nb_outputs; i++) {
1311  if (filter->outputs[i]->frame_wanted_out &&
1312  !filter->outputs[i]->frame_blocked_in) {
1313  return ff_request_frame_to_filter(filter->outputs[i]);
1314  }
1315  }
1316  return FFERROR_NOT_READY;
1317 }
1318 
1319 /*
1320  Filter scheduling and activation
1321 
1322  When a filter is activated, it must:
1323  - if possible, output a frame;
1324  - else, if relevant, forward the input status change;
1325  - else, check outputs for wanted frames and forward the requests.
1326 
1327  The following AVFilterLink fields are used for activation:
1328 
1329  - frame_wanted_out:
1330 
1331  This field indicates if a frame is needed on this input of the
1332  destination filter. A positive value indicates that a frame is needed
1333  to process queued frames or internal data or to satisfy the
1334  application; a zero value indicates that a frame is not especially
1335  needed but could be processed anyway; a negative value indicates that a
1336  frame would just be queued.
1337 
1338  It is set by filters using ff_request_frame() or ff_request_no_frame(),
1339  when requested by the application through a specific API or when it is
1340  set on one of the outputs.
1341 
1342  It is cleared when a frame is sent from the source using
1343  ff_filter_frame().
1344 
1345  It is also cleared when a status change is sent from the source using
1346  ff_avfilter_link_set_in_status().
1347 
1348  - frame_blocked_in:
1349 
1350  This field means that the source filter can not generate a frame as is.
1351  Its goal is to avoid repeatedly calling the request_frame() method on
1352  the same link.
1353 
1354  It is set by the framework on all outputs of a filter before activating it.
1355 
1356  It is automatically cleared by ff_filter_frame().
1357 
1358  It is also automatically cleared by ff_avfilter_link_set_in_status().
1359 
1360  It is also cleared on all outputs (using filter_unblock()) when
1361  something happens on an input: processing a frame or changing the
1362  status.
1363 
1364  - fifo:
1365 
1366  Contains the frames queued on a filter input. If it contains frames and
1367  frame_wanted_out is not set, then the filter can be activated. If that
1368  result in the filter not able to use these frames, the filter must set
1369  frame_wanted_out to ask for more frames.
1370 
1371  - status_in and status_in_pts:
1372 
1373  Status (EOF or error code) of the link and timestamp of the status
1374  change (in link time base, same as frames) as seen from the input of
1375  the link. The status change is considered happening after the frames
1376  queued in fifo.
1377 
1378  It is set by the source filter using ff_avfilter_link_set_in_status().
1379 
1380  - status_out:
1381 
1382  Status of the link as seen from the output of the link. The status
1383  change is considered having already happened.
1384 
1385  It is set by the destination filter using
1386  ff_avfilter_link_set_out_status().
1387 
1388  Filters are activated according to the ready field, set using the
1389  ff_filter_set_ready(). Eventually, a priority queue will be used.
1390  ff_filter_set_ready() is called whenever anything could cause progress to
1391  be possible. Marking a filter ready when it is not is not a problem,
1392  except for the small overhead it causes.
1393 
1394  Conditions that cause a filter to be marked ready are:
1395 
1396  - frames added on an input link;
1397 
1398  - changes in the input or output status of an input link;
1399 
1400  - requests for a frame on an output link;
1401 
1402  - after any actual processing using the legacy methods (filter_frame(),
1403  and request_frame() to acknowledge status changes), to run once more
1404  and check if enough input was present for several frames.
1405 
1406  Exemples of scenarios to consider:
1407 
1408  - buffersrc: activate if frame_wanted_out to notify the application;
1409  activate when the application adds a frame to push it immediately.
1410 
1411  - testsrc: activate only if frame_wanted_out to produce and push a frame.
1412 
1413  - concat (not at stitch points): can process a frame on any output.
1414  Activate if frame_wanted_out on output to forward on the corresponding
1415  input. Activate when a frame is present on input to process it
1416  immediately.
1417 
1418  - framesync: needs at least one frame on each input; extra frames on the
1419  wrong input will accumulate. When a frame is first added on one input,
1420  set frame_wanted_out<0 on it to avoid getting more (would trigger
1421  testsrc) and frame_wanted_out>0 on the other to allow processing it.
1422 
1423  Activation of old filters:
1424 
1425  In order to activate a filter implementing the legacy filter_frame() and
1426  request_frame() methods, perform the first possible of the following
1427  actions:
1428 
1429  - If an input has frames in fifo and frame_wanted_out == 0, dequeue a
1430  frame and call filter_frame().
1431 
1432  Ratinale: filter frames as soon as possible instead of leaving them
1433  queued; frame_wanted_out < 0 is not possible since the old API does not
1434  set it nor provides any similar feedback; frame_wanted_out > 0 happens
1435  when min_samples > 0 and there are not enough samples queued.
1436 
1437  - If an input has status_in set but not status_out, try to call
1438  request_frame() on one of the outputs in the hope that it will trigger
1439  request_frame() on the input with status_in and acknowledge it. This is
1440  awkward and fragile, filters with several inputs or outputs should be
1441  updated to direct activation as soon as possible.
1442 
1443  - If an output has frame_wanted_out > 0 and not frame_blocked_in, call
1444  request_frame().
1445 
1446  Rationale: checking frame_blocked_in is necessary to avoid requesting
1447  repeatedly on a blocked input if another is not blocked (example:
1448  [buffersrc1][testsrc1][buffersrc2][testsrc2]concat=v=2).
1449 
1450  TODO: respect needs_fifo and remove auto-inserted fifos.
1451 
1452  */
1453 
1455 {
1456  int ret;
1457 
1458  /* Generic timeline support is not yet implemented but should be easy */
1460  filter->filter->activate));
1461  filter->ready = 0;
1462  ret = filter->filter->activate ? filter->filter->activate(filter) :
1464  if (ret == FFERROR_NOT_READY)
1465  ret = 0;
1466  return ret;
1467 }
1468 
1469 int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
1470 {
1471  *rpts = link->current_pts;
1472  if (ff_framequeue_queued_frames(&link->fifo))
1473  return *rstatus = 0;
1474  if (link->status_out)
1475  return *rstatus = link->status_out;
1476  if (!link->status_in)
1477  return *rstatus = 0;
1478  *rstatus = link->status_out = link->status_in;
1479  ff_update_link_current_pts(link, link->status_in_pts);
1480  *rpts = link->current_pts;
1481  return 1;
1482 }
1483 
1485 {
1486  return ff_framequeue_queued_frames(&link->fifo) > 0;
1487 }
1488 
1490 {
1491  uint64_t samples = ff_framequeue_queued_samples(&link->fifo);
1492  av_assert1(min);
1493  return samples >= min || (link->status_in && samples);
1494 }
1495 
1496 static void consume_update(AVFilterLink *link, const AVFrame *frame)
1497 {
1498  ff_update_link_current_pts(link, frame->pts);
1499  ff_inlink_process_commands(link, frame);
1500  link->dst->is_disabled = !ff_inlink_evaluate_timeline_at_frame(link, frame);
1501  link->frame_count_out++;
1502 }
1503 
1505 {
1506  AVFrame *frame;
1507 
1508  *rframe = NULL;
1510  return 0;
1511 
1512  if (link->fifo.samples_skipped) {
1513  frame = ff_framequeue_peek(&link->fifo, 0);
1514  return ff_inlink_consume_samples(link, frame->nb_samples, frame->nb_samples, rframe);
1515  }
1516 
1517  frame = ff_framequeue_take(&link->fifo);
1518  consume_update(link, frame);
1519  *rframe = frame;
1520  return 1;
1521 }
1522 
1523 int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max,
1524  AVFrame **rframe)
1525 {
1526  AVFrame *frame;
1527  int ret;
1528 
1529  av_assert1(min);
1530  *rframe = NULL;
1531  if (!ff_inlink_check_available_samples(link, min))
1532  return 0;
1533  if (link->status_in)
1534  min = FFMIN(min, ff_framequeue_queued_samples(&link->fifo));
1535  ret = take_samples(link, min, max, &frame);
1536  if (ret < 0)
1537  return ret;
1538  consume_update(link, frame);
1539  *rframe = frame;
1540  return 1;
1541 }
1542 
1544 {
1545  AVFrame *frame = *rframe;
1546  AVFrame *out;
1547  int ret;
1548 
1549  if (av_frame_is_writable(frame))
1550  return 0;
1551  av_log(link->dst, AV_LOG_DEBUG, "Copying data in avfilter.\n");
1552 
1553  switch (link->type) {
1554  case AVMEDIA_TYPE_VIDEO:
1555  out = ff_get_video_buffer(link, link->w, link->h);
1556  break;
1557  case AVMEDIA_TYPE_AUDIO:
1558  out = ff_get_audio_buffer(link, frame->nb_samples);
1559  break;
1560  default:
1561  return AVERROR(EINVAL);
1562  }
1563  if (!out)
1564  return AVERROR(ENOMEM);
1565 
1566  ret = av_frame_copy_props(out, frame);
1567  if (ret < 0) {
1568  av_frame_free(&out);
1569  return ret;
1570  }
1571 
1572  switch (link->type) {
1573  case AVMEDIA_TYPE_VIDEO:
1574  av_image_copy(out->data, out->linesize, (const uint8_t **)frame->data, frame->linesize,
1575  frame->format, frame->width, frame->height);
1576  break;
1577  case AVMEDIA_TYPE_AUDIO:
1579  0, 0, frame->nb_samples,
1580  frame->channels,
1581  frame->format);
1582  break;
1583  default:
1584  av_assert0(!"reached");
1585  }
1586 
1587  av_frame_free(&frame);
1588  *rframe = out;
1589  return 0;
1590 }
1591 
1593 {
1594  AVFilterCommand *cmd = link->dst->command_queue;
1595 
1596  while(cmd && cmd->time <= frame->pts * av_q2d(link->time_base)){
1597  av_log(link->dst, AV_LOG_DEBUG,
1598  "Processing command time:%f command:%s arg:%s\n",
1599  cmd->time, cmd->command, cmd->arg);
1600  avfilter_process_command(link->dst, cmd->command, cmd->arg, 0, 0, cmd->flags);
1601  ff_command_queue_pop(link->dst);
1602  cmd= link->dst->command_queue;
1603  }
1604  return 0;
1605 }
1606 
1608 {
1609  AVFilterContext *dstctx = link->dst;
1610  int64_t pts = frame->pts;
1611  int64_t pos = frame->pkt_pos;
1612 
1613  if (!dstctx->enable_str)
1614  return 1;
1615 
1616  dstctx->var_values[VAR_N] = link->frame_count_out;
1617  dstctx->var_values[VAR_T] = pts == AV_NOPTS_VALUE ? NAN : pts * av_q2d(link->time_base);
1618  dstctx->var_values[VAR_W] = link->w;
1619  dstctx->var_values[VAR_H] = link->h;
1620  dstctx->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1621 
1622  return fabs(av_expr_eval(dstctx->enable, dstctx->var_values, NULL)) >= 0.5;
1623 }
1624 
1626 {
1627  av_assert1(!link->status_in);
1628  av_assert1(!link->status_out);
1629  link->frame_wanted_out = 1;
1630  ff_filter_set_ready(link->src, 100);
1631 }
1632 
1633 void ff_inlink_set_status(AVFilterLink *link, int status)
1634 {
1635  if (link->status_out)
1636  return;
1637  link->frame_wanted_out = 0;
1638  link->frame_blocked_in = 0;
1640  while (ff_framequeue_queued_frames(&link->fifo)) {
1641  AVFrame *frame = ff_framequeue_take(&link->fifo);
1642  av_frame_free(&frame);
1643  }
1644  if (!link->status_in)
1645  link->status_in = status;
1646 }
1647 
1649 {
1650  return link->status_in;
1651 }
1652 
1654 {
1655  return &avfilter_class;
1656 }
int(* poll_frame)(AVFilterLink *link)
Frame poll callback.
Definition: internal.h:104
double * var_values
variable values for the enable expression
Definition: avfilter.h:384
#define ff_tlog(ctx,...)
Definition: internal.h:80
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
Definition: avfilter.c:1504
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
#define FF_FILTER_FLAG_HWFRAME_AWARE
The filter is aware of hardware frames, and any hardware frame context should not be automatically pr...
Definition: internal.h:385
void ff_tlog_ref(void *ctx, AVFrame *ref, int end)
Definition: avfilter.c:49
static void copy(const float *p1, float *p2, const int length)
Accept to parse a value without a key; the key will then be returned as NULL.
Definition: opt.h:527
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:125
AVFilterContext * ff_filter_alloc(const AVFilter *filter, const char *inst_name)
Allocate a new filter context and return it.
Definition: avfilter.c:696
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
int thread_type
Type of multithreading allowed for filters in this graph.
Definition: avfilter.h:825
static int default_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1077
AVOption.
Definition: opt.h:246
static int ff_filter_activate_default(AVFilterContext *filter)
Definition: avfilter.c:1295
void avfilter_free(AVFilterContext *filter)
Free a filter context.
Definition: avfilter.c:793
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:473
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:393
int(* init)(AVFilterContext *ctx)
Filter initialization function.
Definition: avfilter.h:233
int(* preinit)(AVFilterContext *ctx)
Filter pre-initialization function.
Definition: avfilter.h:210
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:1291
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1072
void ff_framequeue_skip_samples(FFFrameQueue *fq, size_t samples, AVRational time_base)
Skip samples from the first frame in the queue.
Definition: framequeue.c:126
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:394
#define FFERROR_NOT_READY
Filters implementation helper functions.
Definition: filters.h:34
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
#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:236
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:679
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:92
int ff_inlink_check_available_samples(AVFilterLink *link, unsigned min)
Test if enough samples are available on the link.
Definition: avfilter.c:1489
#define src
Definition: vp8dsp.c:254
int thread_type
Type of multithreading being allowed/used.
Definition: avfilter.h:373
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1625
int nb_threads
Max number of threads allowed in this filter instance.
Definition: avfilter.h:401
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
#define AVFILTER_THREAD_SLICE
Process multiple parts of the frame concurrently.
Definition: avfilter.h:333
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:355
#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:60
int priv_size
size of private data to allocate for the filter
Definition: avfilter.h:284
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:346
char * name
name of this filter instance
Definition: avfilter.h:343
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:577
const char * name
Definition: opt.h:247
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1113
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:135
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
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, int clip)
Definition: cfhd.c:97
void ff_frame_pool_uninit(FFFramePool **pool)
Deallocate the frame pool.
Definition: framepool.c:284
const char * avfilter_license(void)
Return the libavfilter license.
Definition: avfilter.c:88
unsigned ready
Ready status of the filter.
Definition: avfilter.h:408
uint8_t
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:113
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:294
Definition: eval.c:157
int flags
A combination of AVFILTER_FLAG_*.
Definition: avfilter.h:187
void ff_command_queue_pop(AVFilterContext *filter)
Definition: avfilter.c:94
static void filter_unblock(AVFilterContext *filter)
Clear frame_blocked_in on all outputs.
Definition: avfilter.c:200
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:832
int avfilter_config_links(AVFilterContext *filter)
Negotiate the media format, dimensions, etc of all inputs to a filter.
Definition: avfilter.c:275
static int flags
Definition: log.c:57
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:88
const AVFilter * avfilter_next(const AVFilter *prev)
Iterate over all registered filters.
Definition: avfilter.c:609
#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:348
void(* uninit)(AVFilterContext *ctx)
Filter uninitialization function.
Definition: avfilter.h:258
static void free_link(AVFilterLink *link)
Definition: avfilter.c:772
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:306
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:198
const OptionDef options[]
Definition: ffserver.c:3948
int ff_framequeue_add(FFFrameQueue *fq, AVFrame *frame)
Add a frame.
Definition: framequeue.c:63
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
void ff_update_link_current_pts(AVFilterLink *link, int64_t pts)
Definition: avfilter.c:544
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:308
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
int ff_inlink_evaluate_timeline_at_frame(AVFilterLink *link, const AVFrame *frame)
Evaluate the timeline expression of the link for the time and properties of the frame.
Definition: avfilter.c:1607
static const AVClass avfilter_class
Definition: avfilter.c:673
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1469
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
static int forward_status_change(AVFilterContext *filter, AVFilterLink *in)
Definition: avfilter.c:1263
static void consume_update(AVFilterLink *link, const AVFrame *frame)
Definition: avfilter.c:1496
int width
Definition: frame.h:259
#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: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:786
static const char * default_filter_name(void *filter_ctx)
Definition: avfilter.c:626
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:86
#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:186
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
unsigned avfilter_version(void)
Return the LIBAVFILTER_VERSION_INT constant.
Definition: avfilter.c:77
const char * r
Definition: vf_curves.c:111
void * priv
private data for use by the filter
Definition: avfilter.h:353
#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:93
char * enable_str
enable expression string
Definition: avfilter.h:382
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:246
simple assert() macros that are a bit more flexible than ISO C assert().
#define FF_TPRINTF_START(ctx, func)
Definition: internal.h:250
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:45
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
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
GLsizei count
Definition: opengl_enc.c:109
#define FFMAX(a, b)
Definition: common.h:94
Frame pool.
Definition: framepool.c:30
#define fail()
Definition: checkasm.h:109
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:386
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:379
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:579
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:1594
void ff_framequeue_free(FFFrameQueue *fq)
Free the queue and all queued frames.
Definition: framequeue.c:53
common internal API header
static void * filter_child_next(void *obj, void *prev)
Definition: avfilter.c:632
void avfilter_link_set_closed(AVFilterLink *link, int closed)
Set the closed field of a link.
Definition: avfilter.c:233
int channels
number of audio channels, only used for audio.
Definition: frame.h:506
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:284
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:835
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
#define NAN
Definition: mathematics.h:64
#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:554
static AVFilter * first_filter
Definition: avfilter.c:576
struct AVFilterCommand * next
Definition: internal.h:43
static const AVOption avfilter_options[]
Definition: avfilter.c:663
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
AVFrame * ff_framequeue_take(FFFrameQueue *fq)
Take the first frame in the queue.
Definition: framequeue.c:98
#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
static int ff_request_frame_to_filter(AVFilterLink *link)
Definition: avfilter.c:448
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:222
int needs_writable
The filter expects writable frames from its input link, duplicating data buffers if needed...
Definition: internal.h:145
int flags_internal
Additional flags for avfilter internal use only.
Definition: avfilter.h:286
int n
Definition: avisynth_c.h:684
static int ff_filter_frame_to_filter(AVFilterLink *link)
Definition: avfilter.c:1231
int(* init_opaque)(AVFilterContext *ctx, void *opaque)
Filter initialization function, alternative to the init() callback.
Definition: avfilter.h:313
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1543
int av_opt_set_dict2(void *obj, AVDictionary **options, int search_flags)
Set all the options from a given dictionary on an object.
Definition: opt.c:1564
static void error(const char *err)
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:957
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:1653
#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:238
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:274
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:251
int offset
The offset relative to the context structure where the option value is stored.
Definition: opt.h:259
void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
Definition: avfilter.c:381
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:334
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVFilterGraphInternal * internal
Opaque object for libavfilter internal use.
Definition: avfilter.h:837
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:549
int av_opt_set_dict(void *obj, AVDictionary **options)
Set all the options from a given dictionary on an object.
Definition: opt.c:1589
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link's FIFO and update the link's stats.
Definition: avfilter.c:1523
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:289
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
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
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:555
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:47
int ff_inlink_process_commands(AVFilterLink *link, const AVFrame *frame)
Process the commands queued in the link up to the time of the frame.
Definition: avfilter.c:1592
Describe the class of an AVClass context structure.
Definition: log.h:67
int sample_rate
Sample rate of the audio data.
Definition: frame.h:374
Filter definition.
Definition: avfilter.h:144
static int take_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Definition: avfilter.c:1171
static const char *const var_names[]
Definition: avfilter.c:486
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1648
Rational number (pair of numerator and denominator).
Definition: rational.h:58
struct AVFilter * next
Used by the filter registration system.
Definition: avfilter.h:292
static int64_t guess_status_pts(AVFilterContext *ctx, int status, AVRational link_time_base)
Definition: avfilter.c:430
int(* func)(AVBPrint *dst, const char *in, const char *arg)
Definition: jacosubdec.c:67
void ff_inlink_set_status(AVFilterLink *link, int status)
Set the status on an input link.
Definition: avfilter.c:1633
int ff_inlink_check_available_frame(AVFilterLink *link)
Test if a frame is available on the link.
Definition: avfilter.c:1484
AVMediaType
Definition: avutil.h:199
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:83
static uint64_t ff_framequeue_queued_samples(const FFFrameQueue *fq)
Get the number of queued samples.
Definition: framequeue.h:154
const char * avfilter_pad_get_name(const AVFilterPad *pads, int pad_idx)
Get the name of an AVFilterPad.
Definition: avfilter.c:1067
#define FLAGS
Definition: avfilter.c:662
AVFrame * ff_framequeue_peek(FFFrameQueue *fq, size_t idx)
Access a frame in the queue, without removing it.
Definition: framequeue.c:115
#define LICENSE_PREFIX
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define OFFSET(x)
Definition: avfilter.c:661
static int64_t pts
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:76
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
static int default_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: avfilter.c:683
static int filter_frame(DBEContext *s, AVFrame *frame)
Definition: dolby_e.c:565
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
int avfilter_init_dict(AVFilterContext *ctx, AVDictionary **options)
Initialize a filter with the supplied dictionary of options.
Definition: avfilter.c:920
int
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1544
static int set_enable_expr(AVFilterContext *ctx, const char *expr)
Definition: avfilter.c:504
static size_t ff_framequeue_queued_frames(const FFFrameQueue *fq)
Get the number of queued frames.
Definition: framequeue.h:146
common internal and external API header
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:380
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
Mark a filter ready and schedule it for activation.
Definition: avfilter.c:191
#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:563
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
avfilter_execute_func * execute
Definition: internal.h:155
static int samples_ready(AVFilterLink *link, unsigned min)
Definition: avfilter.c:1164
void ff_filter_graph_remove_filter(AVFilterGraph *graph, AVFilterContext *filter)
Remove a filter from a graph;.
avfilter_execute_func * thread_execute
Definition: internal.h:150
#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:593
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:353
enum AVOptionType type
Definition: opt.h:260
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:1470
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:734
void * enable
parsed expression (AVExpr*)
Definition: avfilter.h:383
const AVClass * av_class
needed for av_log() and filters common options
Definition: avfilter.h:339
static int ff_filter_frame_framed(AVFilterLink *link, AVFrame *frame)
Definition: avfilter.c:1082
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
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:209
An instance of a filter.
Definition: avfilter.h:338
#define av_uninit(x)
Definition: attributes.h:148
int avfilter_pad_count(const AVFilterPad *pads)
Get the number of elements in a NULL-terminated array of AVFilterPads (e.g.
Definition: avfilter.c:614
int height
Definition: frame.h:259
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:103
#define av_freep(p)
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:129
#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
FFFrameQueueGlobal frame_queues
Definition: internal.h:151
#define av_malloc_array(a, b)
double time
time expressed in seconds
Definition: internal.h:39
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:405
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:2275
static const AVClass * filter_child_class_next(const AVClass *prev)
Definition: avfilter.c:640
internal API functions
void ff_framequeue_init(FFFrameQueue *fq, FFFrameQueueGlobal *fqg)
Init a frame queue and attach it to a global structure.
Definition: framequeue.c:47
int ff_filter_activate(AVFilterContext *filter)
Definition: avfilter.c:1454
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:248
int(* activate)(AVFilterContext *ctx)
Filter activation function.
Definition: avfilter.h:327
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:468
float min
void avfilter_link_free(AVFilterLink **link)
Free the link in *link, and set its pointer to NULL.
Definition: avfilter.c:174
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:449
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:267
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:609
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
char * command
command
Definition: internal.h:40
#define av_unused
Definition: attributes.h:125
static int process_options(AVFilterContext *ctx, AVDictionary **options, const char *args)
Definition: avfilter.c:842
simple arithmetic expression evaluator
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
const char * name
Definition: opengl_enc.c:103
char * arg
optional argument for the command
Definition: internal.h:41
#define LIBAVFILTER_VERSION_MICRO
Definition: version.h:34