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ffmpeg_filter.c
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1 /*
2  * ffmpeg filter configuration
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <stdint.h>
22 
23 #include "ffmpeg.h"
24 
25 #include "libavfilter/avfilter.h"
26 #include "libavfilter/buffersink.h"
27 
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
34 #include "libavutil/display.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/pixfmt.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
40 
42 {
43  if (codec && codec->pix_fmts) {
44  const enum AVPixelFormat *p = codec->pix_fmts;
45  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
46  int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
47  enum AVPixelFormat best= AV_PIX_FMT_NONE;
48  static const enum AVPixelFormat mjpeg_formats[] =
50  static const enum AVPixelFormat ljpeg_formats[] =
53 
55  if (enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
56  p = mjpeg_formats;
57  } else if (enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
58  p =ljpeg_formats;
59  }
60  }
61  for (; *p != AV_PIX_FMT_NONE; p++) {
62  best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
63  if (*p == target)
64  break;
65  }
66  if (*p == AV_PIX_FMT_NONE) {
67  if (target != AV_PIX_FMT_NONE)
69  "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
70  av_get_pix_fmt_name(target),
71  codec->name,
72  av_get_pix_fmt_name(best));
73  return best;
74  }
75  }
76  return target;
77 }
78 
80 {
81  if (codec && codec->sample_fmts) {
82  const enum AVSampleFormat *p = codec->sample_fmts;
83  for (; *p != -1; p++) {
84  if (*p == st->codec->sample_fmt)
85  break;
86  }
87  if (*p == -1) {
89  av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
92  "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
94  codec->name,
96  st->codec->sample_fmt = codec->sample_fmts[0];
97  }
98  }
99 }
100 
101 static char *choose_pix_fmts(OutputStream *ost)
102 {
103  AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
104  if (strict_dict)
105  // used by choose_pixel_fmt() and below
106  av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
107 
108  if (ost->keep_pix_fmt) {
109  if (ost->filter)
112  if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
113  return NULL;
115  }
116  if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
117  return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
118  } else if (ost->enc && ost->enc->pix_fmts) {
119  const enum AVPixelFormat *p;
120  AVIOContext *s = NULL;
121  uint8_t *ret;
122  int len;
123 
124  if (avio_open_dyn_buf(&s) < 0)
125  exit_program(1);
126 
127  p = ost->enc->pix_fmts;
129  if (ost->enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
131  } else if (ost->enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
134  }
135  }
136 
137  for (; *p != AV_PIX_FMT_NONE; p++) {
138  const char *name = av_get_pix_fmt_name(*p);
139  avio_printf(s, "%s|", name);
140  }
141  len = avio_close_dyn_buf(s, &ret);
142  ret[len - 1] = 0;
143  return ret;
144  } else
145  return NULL;
146 }
147 
148 /* Define a function for building a string containing a list of
149  * allowed formats. */
150 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
151 static char *choose_ ## var ## s(OutputStream *ost) \
152 { \
153  if (ost->enc_ctx->var != none) { \
154  get_name(ost->enc_ctx->var); \
155  return av_strdup(name); \
156  } else if (ost->enc && ost->enc->supported_list) { \
157  const type *p; \
158  AVIOContext *s = NULL; \
159  uint8_t *ret; \
160  int len; \
161  \
162  if (avio_open_dyn_buf(&s) < 0) \
163  exit_program(1); \
164  \
165  for (p = ost->enc->supported_list; *p != none; p++) { \
166  get_name(*p); \
167  avio_printf(s, "%s|", name); \
168  } \
169  len = avio_close_dyn_buf(s, &ret); \
170  ret[len - 1] = 0; \
171  return ret; \
172  } else \
173  return NULL; \
174 }
175 
176 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
177 // GET_PIX_FMT_NAME)
178 
181 
184 
185 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
187 
189 {
190  FilterGraph *fg = av_mallocz(sizeof(*fg));
191 
192  if (!fg)
193  exit_program(1);
194  fg->index = nb_filtergraphs;
195 
196  GROW_ARRAY(fg->outputs, fg->nb_outputs);
197  if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
198  exit_program(1);
199  fg->outputs[0]->ost = ost;
200  fg->outputs[0]->graph = fg;
201 
202  ost->filter = fg->outputs[0];
203 
204  GROW_ARRAY(fg->inputs, fg->nb_inputs);
205  if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
206  exit_program(1);
207  fg->inputs[0]->ist = ist;
208  fg->inputs[0]->graph = fg;
209 
210  GROW_ARRAY(ist->filters, ist->nb_filters);
211  ist->filters[ist->nb_filters - 1] = fg->inputs[0];
212 
214  filtergraphs[nb_filtergraphs - 1] = fg;
215 
216  return fg;
217 }
218 
220 {
221  InputStream *ist = NULL;
223  int i;
224 
225  // TODO: support other filter types
226  if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
227  av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
228  "currently.\n");
229  exit_program(1);
230  }
231 
232  if (in->name) {
234  AVStream *st = NULL;
235  char *p;
236  int file_idx = strtol(in->name, &p, 0);
237 
238  if (file_idx < 0 || file_idx >= nb_input_files) {
239  av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
240  file_idx, fg->graph_desc);
241  exit_program(1);
242  }
243  s = input_files[file_idx]->ctx;
244 
245  for (i = 0; i < s->nb_streams; i++) {
246  enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
247  if (stream_type != type &&
248  !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
249  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
250  continue;
251  if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
252  st = s->streams[i];
253  break;
254  }
255  }
256  if (!st) {
257  av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
258  "matches no streams.\n", p, fg->graph_desc);
259  exit_program(1);
260  }
261  ist = input_streams[input_files[file_idx]->ist_index + st->index];
262  } else {
263  /* find the first unused stream of corresponding type */
264  for (i = 0; i < nb_input_streams; i++) {
265  ist = input_streams[i];
266  if (ist->dec_ctx->codec_type == type && ist->discard)
267  break;
268  }
269  if (i == nb_input_streams) {
270  av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
271  "unlabeled input pad %d on filter %s\n", in->pad_idx,
272  in->filter_ctx->name);
273  exit_program(1);
274  }
275  }
276  av_assert0(ist);
277 
278  ist->discard = 0;
280  ist->st->discard = AVDISCARD_NONE;
281 
282  GROW_ARRAY(fg->inputs, fg->nb_inputs);
283  if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
284  exit_program(1);
285  fg->inputs[fg->nb_inputs - 1]->ist = ist;
286  fg->inputs[fg->nb_inputs - 1]->graph = fg;
287 
288  GROW_ARRAY(ist->filters, ist->nb_filters);
289  ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
290 }
291 
293 {
294  AVFilterInOut *inputs, *outputs, *cur;
295  AVFilterGraph *graph;
296  int ret = 0;
297 
298  /* this graph is only used for determining the kinds of inputs
299  * and outputs we have, and is discarded on exit from this function */
300  graph = avfilter_graph_alloc();
301  if (!graph)
302  return AVERROR(ENOMEM);
303 
304  ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
305  if (ret < 0)
306  goto fail;
307 
308  for (cur = inputs; cur; cur = cur->next)
309  init_input_filter(fg, cur);
310 
311  for (cur = outputs; cur;) {
312  GROW_ARRAY(fg->outputs, fg->nb_outputs);
313  fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
314  if (!fg->outputs[fg->nb_outputs - 1])
315  exit_program(1);
316 
317  fg->outputs[fg->nb_outputs - 1]->graph = fg;
318  fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
320  cur->pad_idx);
321  cur = cur->next;
322  fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
323  }
324 
325 fail:
326  avfilter_inout_free(&inputs);
327  avfilter_graph_free(&graph);
328  return ret;
329 }
330 
331 static int insert_trim(int64_t start_time, int64_t duration,
332  AVFilterContext **last_filter, int *pad_idx,
333  const char *filter_name)
334 {
335  AVFilterGraph *graph = (*last_filter)->graph;
336  AVFilterContext *ctx;
337  const AVFilter *trim;
338  enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
339  const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
340  int ret = 0;
341 
342  if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
343  return 0;
344 
345  trim = avfilter_get_by_name(name);
346  if (!trim) {
347  av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
348  "recording time.\n", name);
350  }
351 
352  ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
353  if (!ctx)
354  return AVERROR(ENOMEM);
355 
356  if (duration != INT64_MAX) {
357  ret = av_opt_set_int(ctx, "durationi", duration,
359  }
360  if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
361  ret = av_opt_set_int(ctx, "starti", start_time,
363  }
364  if (ret < 0) {
365  av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
366  return ret;
367  }
368 
369  ret = avfilter_init_str(ctx, NULL);
370  if (ret < 0)
371  return ret;
372 
373  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
374  if (ret < 0)
375  return ret;
376 
377  *last_filter = ctx;
378  *pad_idx = 0;
379  return 0;
380 }
381 
382 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
383  const char *filter_name, const char *args)
384 {
385  AVFilterGraph *graph = (*last_filter)->graph;
386  AVFilterContext *ctx;
387  int ret;
388 
389  ret = avfilter_graph_create_filter(&ctx,
390  avfilter_get_by_name(filter_name),
391  filter_name, args, NULL, graph);
392  if (ret < 0)
393  return ret;
394 
395  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
396  if (ret < 0)
397  return ret;
398 
399  *last_filter = ctx;
400  *pad_idx = 0;
401  return 0;
402 }
403 
405 {
406  char *pix_fmts;
407  OutputStream *ost = ofilter->ost;
408  OutputFile *of = output_files[ost->file_index];
409  AVCodecContext *codec = ost->enc_ctx;
411  int pad_idx = out->pad_idx;
412  int ret;
413  char name[255];
414 
415  snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
416  ret = avfilter_graph_create_filter(&ofilter->filter,
417  avfilter_get_by_name("buffersink"),
418  name, NULL, NULL, fg->graph);
419 
420  if (ret < 0)
421  return ret;
422 
423  if (codec->width || codec->height) {
424  char args[255];
426  AVDictionaryEntry *e = NULL;
427 
428  snprintf(args, sizeof(args), "%d:%d",
429  codec->width,
430  codec->height);
431 
432  while ((e = av_dict_get(ost->sws_dict, "", e,
434  av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
435  }
436 
437  snprintf(name, sizeof(name), "scaler for output stream %d:%d",
438  ost->file_index, ost->index);
439  if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
440  name, args, NULL, fg->graph)) < 0)
441  return ret;
442  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
443  return ret;
444 
445  last_filter = filter;
446  pad_idx = 0;
447  }
448 
449  if ((pix_fmts = choose_pix_fmts(ost))) {
451  snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
452  ost->file_index, ost->index);
453  ret = avfilter_graph_create_filter(&filter,
454  avfilter_get_by_name("format"),
455  "format", pix_fmts, NULL, fg->graph);
456  av_freep(&pix_fmts);
457  if (ret < 0)
458  return ret;
459  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
460  return ret;
461 
462  last_filter = filter;
463  pad_idx = 0;
464  }
465 
466  if (ost->frame_rate.num && 0) {
467  AVFilterContext *fps;
468  char args[255];
469 
470  snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
471  ost->frame_rate.den);
472  snprintf(name, sizeof(name), "fps for output stream %d:%d",
473  ost->file_index, ost->index);
475  name, args, NULL, fg->graph);
476  if (ret < 0)
477  return ret;
478 
479  ret = avfilter_link(last_filter, pad_idx, fps, 0);
480  if (ret < 0)
481  return ret;
482  last_filter = fps;
483  pad_idx = 0;
484  }
485 
486  snprintf(name, sizeof(name), "trim for output stream %d:%d",
487  ost->file_index, ost->index);
488  ret = insert_trim(of->start_time, of->recording_time,
489  &last_filter, &pad_idx, name);
490  if (ret < 0)
491  return ret;
492 
493 
494  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
495  return ret;
496 
497  return 0;
498 }
499 
501 {
502  OutputStream *ost = ofilter->ost;
503  OutputFile *of = output_files[ost->file_index];
504  AVCodecContext *codec = ost->enc_ctx;
506  int pad_idx = out->pad_idx;
507  char *sample_fmts, *sample_rates, *channel_layouts;
508  char name[255];
509  int ret;
510 
511  snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
512  ret = avfilter_graph_create_filter(&ofilter->filter,
513  avfilter_get_by_name("abuffersink"),
514  name, NULL, NULL, fg->graph);
515  if (ret < 0)
516  return ret;
517  if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
518  return ret;
519 
520 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
521  AVFilterContext *filt_ctx; \
522  \
523  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
524  "similarly to -af " filter_name "=%s.\n", arg); \
525  \
526  ret = avfilter_graph_create_filter(&filt_ctx, \
527  avfilter_get_by_name(filter_name), \
528  filter_name, arg, NULL, fg->graph); \
529  if (ret < 0) \
530  return ret; \
531  \
532  ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
533  if (ret < 0) \
534  return ret; \
535  \
536  last_filter = filt_ctx; \
537  pad_idx = 0; \
538 } while (0)
539  if (ost->audio_channels_mapped) {
540  int i;
541  AVBPrint pan_buf;
542  av_bprint_init(&pan_buf, 256, 8192);
543  av_bprintf(&pan_buf, "0x%"PRIx64,
545  for (i = 0; i < ost->audio_channels_mapped; i++)
546  if (ost->audio_channels_map[i] != -1)
547  av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
548 
549  AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
550  av_bprint_finalize(&pan_buf, NULL);
551  }
552 
553  if (codec->channels && !codec->channel_layout)
555 
556  sample_fmts = choose_sample_fmts(ost);
557  sample_rates = choose_sample_rates(ost);
558  channel_layouts = choose_channel_layouts(ost);
559  if (sample_fmts || sample_rates || channel_layouts) {
560  AVFilterContext *format;
561  char args[256];
562  args[0] = 0;
563 
564  if (sample_fmts)
565  av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
566  sample_fmts);
567  if (sample_rates)
568  av_strlcatf(args, sizeof(args), "sample_rates=%s:",
569  sample_rates);
570  if (channel_layouts)
571  av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
572  channel_layouts);
573 
574  av_freep(&sample_fmts);
575  av_freep(&sample_rates);
576  av_freep(&channel_layouts);
577 
578  snprintf(name, sizeof(name), "audio format for output stream %d:%d",
579  ost->file_index, ost->index);
580  ret = avfilter_graph_create_filter(&format,
581  avfilter_get_by_name("aformat"),
582  name, args, NULL, fg->graph);
583  if (ret < 0)
584  return ret;
585 
586  ret = avfilter_link(last_filter, pad_idx, format, 0);
587  if (ret < 0)
588  return ret;
589 
590  last_filter = format;
591  pad_idx = 0;
592  }
593 
594  if (audio_volume != 256 && 0) {
595  char args[256];
596 
597  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
598  AUTO_INSERT_FILTER("-vol", "volume", args);
599  }
600 
601  if (ost->apad && of->shortest) {
602  char args[256];
603  int i;
604 
605  for (i=0; i<of->ctx->nb_streams; i++)
606  if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
607  break;
608 
609  if (i<of->ctx->nb_streams) {
610  snprintf(args, sizeof(args), "%s", ost->apad);
611  AUTO_INSERT_FILTER("-apad", "apad", args);
612  }
613  }
614 
615  snprintf(name, sizeof(name), "trim for output stream %d:%d",
616  ost->file_index, ost->index);
617  ret = insert_trim(of->start_time, of->recording_time,
618  &last_filter, &pad_idx, name);
619  if (ret < 0)
620  return ret;
621 
622  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
623  return ret;
624 
625  return 0;
626 }
627 
628 #define DESCRIBE_FILTER_LINK(f, inout, in) \
629 { \
630  AVFilterContext *ctx = inout->filter_ctx; \
631  AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
632  int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
633  AVIOContext *pb; \
634  \
635  if (avio_open_dyn_buf(&pb) < 0) \
636  exit_program(1); \
637  \
638  avio_printf(pb, "%s", ctx->filter->name); \
639  if (nb_pads > 1) \
640  avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
641  avio_w8(pb, 0); \
642  avio_close_dyn_buf(pb, &f->name); \
643 }
644 
646 {
647  av_freep(&ofilter->name);
648  DESCRIBE_FILTER_LINK(ofilter, out, 0);
649 
650  if (!ofilter->ost) {
651  av_log(NULL, AV_LOG_FATAL, "Filter %s has a unconnected output\n", ofilter->name);
652  exit_program(1);
653  }
654 
655  switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
656  case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
657  case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
658  default: av_assert0(0);
659  }
660 }
661 
663 {
665  int i, w, h;
666 
667  /* Compute the size of the canvas for the subtitles stream.
668  If the subtitles codec has set a size, use it. Otherwise use the
669  maximum dimensions of the video streams in the same file. */
670  w = ist->dec_ctx->width;
671  h = ist->dec_ctx->height;
672  if (!(w && h)) {
673  for (i = 0; i < avf->nb_streams; i++) {
674  if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
675  w = FFMAX(w, avf->streams[i]->codec->width);
676  h = FFMAX(h, avf->streams[i]->codec->height);
677  }
678  }
679  if (!(w && h)) {
680  w = FFMAX(w, 720);
681  h = FFMAX(h, 576);
682  }
683  av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
684  }
685  ist->sub2video.w = ist->resample_width = w;
686  ist->sub2video.h = ist->resample_height = h;
687 
688  /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
689  palettes for all rectangles are identical or compatible */
691 
692  ist->sub2video.frame = av_frame_alloc();
693  if (!ist->sub2video.frame)
694  return AVERROR(ENOMEM);
695  ist->sub2video.last_pts = INT64_MIN;
696  return 0;
697 }
698 
700  AVFilterInOut *in)
701 {
703  const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
704  InputStream *ist = ifilter->ist;
705  InputFile *f = input_files[ist->file_index];
706  AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
707  ist->st->time_base;
708  AVRational fr = ist->framerate;
709  AVRational sar;
710  AVBPrint args;
711  char name[255];
712  int ret, pad_idx = 0;
713  int64_t tsoffset = 0;
714 
715  if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
716  av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
717  return AVERROR(EINVAL);
718  }
719 
720  if (!fr.num)
721  fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
722 
724  ret = sub2video_prepare(ist);
725  if (ret < 0)
726  return ret;
727  }
728 
729  sar = ist->st->sample_aspect_ratio.num ?
730  ist->st->sample_aspect_ratio :
732  if(!sar.den)
733  sar = (AVRational){0,1};
734  av_bprint_init(&args, 0, 1);
735  av_bprintf(&args,
736  "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
737  "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
738  ist->resample_height,
740  tb.num, tb.den, sar.num, sar.den,
742  if (fr.num && fr.den)
743  av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
744  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
745  ist->file_index, ist->st->index);
746 
747  if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
748  args.str, NULL, fg->graph)) < 0)
749  return ret;
750  last_filter = ifilter->filter;
751 
752  if (ist->autorotate) {
753  double theta = get_rotation(ist->st);
754 
755  if (fabs(theta - 90) < 1.0) {
756  ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
757  } else if (fabs(theta - 180) < 1.0) {
758  ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
759  if (ret < 0)
760  return ret;
761  ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
762  } else if (fabs(theta - 270) < 1.0) {
763  ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
764  } else if (fabs(theta) > 1.0) {
765  char rotate_buf[64];
766  snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
767  ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
768  }
769  if (ret < 0)
770  return ret;
771  }
772 
773  if (ist->framerate.num) {
774  AVFilterContext *setpts;
775 
776  snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
777  ist->file_index, ist->st->index);
778  if ((ret = avfilter_graph_create_filter(&setpts,
779  avfilter_get_by_name("setpts"),
780  name, "N", NULL,
781  fg->graph)) < 0)
782  return ret;
783 
784  if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
785  return ret;
786 
787  last_filter = setpts;
788  }
789 
790  if (do_deinterlace) {
791  AVFilterContext *yadif;
792 
793  snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
794  ist->file_index, ist->st->index);
795  if ((ret = avfilter_graph_create_filter(&yadif,
796  avfilter_get_by_name("yadif"),
797  name, "", NULL,
798  fg->graph)) < 0)
799  return ret;
800 
801  if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
802  return ret;
803 
804  last_filter = yadif;
805  }
806 
807  snprintf(name, sizeof(name), "trim for input stream %d:%d",
808  ist->file_index, ist->st->index);
809  if (copy_ts) {
810  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
812  tsoffset += f->ctx->start_time;
813  }
814  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
815  AV_NOPTS_VALUE : tsoffset, f->recording_time,
816  &last_filter, &pad_idx, name);
817  if (ret < 0)
818  return ret;
819 
820  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
821  return ret;
822  return 0;
823 }
824 
826  AVFilterInOut *in)
827 {
829  const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
830  InputStream *ist = ifilter->ist;
831  InputFile *f = input_files[ist->file_index];
832  AVBPrint args;
833  char name[255];
834  int ret, pad_idx = 0;
835  int64_t tsoffset = 0;
836 
837  if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
838  av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
839  return AVERROR(EINVAL);
840  }
841 
843  av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
844  1, ist->dec_ctx->sample_rate,
845  ist->dec_ctx->sample_rate,
847  if (ist->dec_ctx->channel_layout)
848  av_bprintf(&args, ":channel_layout=0x%"PRIx64,
849  ist->dec_ctx->channel_layout);
850  else
851  av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
852  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
853  ist->file_index, ist->st->index);
854 
855  if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
856  name, args.str, NULL,
857  fg->graph)) < 0)
858  return ret;
859  last_filter = ifilter->filter;
860 
861 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
862  AVFilterContext *filt_ctx; \
863  \
864  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
865  "similarly to -af " filter_name "=%s.\n", arg); \
866  \
867  snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
868  fg->index, filter_name, ist->file_index, ist->st->index); \
869  ret = avfilter_graph_create_filter(&filt_ctx, \
870  avfilter_get_by_name(filter_name), \
871  name, arg, NULL, fg->graph); \
872  if (ret < 0) \
873  return ret; \
874  \
875  ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
876  if (ret < 0) \
877  return ret; \
878  \
879  last_filter = filt_ctx; \
880 } while (0)
881 
882  if (audio_sync_method > 0) {
883  char args[256] = {0};
884 
885  av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
886  if (audio_drift_threshold != 0.1)
887  av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
888  if (!fg->reconfiguration)
889  av_strlcatf(args, sizeof(args), ":first_pts=0");
890  AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
891  }
892 
893 // if (ost->audio_channels_mapped) {
894 // int i;
895 // AVBPrint pan_buf;
896 // av_bprint_init(&pan_buf, 256, 8192);
897 // av_bprintf(&pan_buf, "0x%"PRIx64,
898 // av_get_default_channel_layout(ost->audio_channels_mapped));
899 // for (i = 0; i < ost->audio_channels_mapped; i++)
900 // if (ost->audio_channels_map[i] != -1)
901 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
902 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
903 // av_bprint_finalize(&pan_buf, NULL);
904 // }
905 
906  if (audio_volume != 256) {
907  char args[256];
908 
909  av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
910  "audio filter instead.\n");
911 
912  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
913  AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
914  }
915 
916  snprintf(name, sizeof(name), "trim for input stream %d:%d",
917  ist->file_index, ist->st->index);
918  if (copy_ts) {
919  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
921  tsoffset += f->ctx->start_time;
922  }
923  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
924  AV_NOPTS_VALUE : tsoffset, f->recording_time,
925  &last_filter, &pad_idx, name);
926  if (ret < 0)
927  return ret;
928 
929  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
930  return ret;
931 
932  return 0;
933 }
934 
936  AVFilterInOut *in)
937 {
938  av_freep(&ifilter->name);
939  DESCRIBE_FILTER_LINK(ifilter, in, 1);
940 
941  if (!ifilter->ist->dec) {
943  "No decoder for stream #%d:%d, filtering impossible\n",
944  ifilter->ist->file_index, ifilter->ist->st->index);
946  }
947  switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
948  case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
949  case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
950  default: av_assert0(0);
951  }
952 }
953 
955 {
956  AVFilterInOut *inputs, *outputs, *cur;
957  int ret, i, simple = !fg->graph_desc;
958  const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
959  fg->graph_desc;
960 
962  if (!(fg->graph = avfilter_graph_alloc()))
963  return AVERROR(ENOMEM);
964 
965  if (simple) {
966  OutputStream *ost = fg->outputs[0]->ost;
967  char args[512];
968  AVDictionaryEntry *e = NULL;
969 
970  args[0] = 0;
971  while ((e = av_dict_get(ost->sws_dict, "", e,
973  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
974  }
975  if (strlen(args))
976  args[strlen(args)-1] = 0;
977  fg->graph->scale_sws_opts = av_strdup(args);
978 
979  args[0] = 0;
980  while ((e = av_dict_get(ost->swr_opts, "", e,
982  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
983  }
984  if (strlen(args))
985  args[strlen(args)-1] = 0;
986  av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
987 
988  args[0] = '\0';
989  while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
991  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
992  }
993  if (strlen(args))
994  args[strlen(args) - 1] = '\0';
995  fg->graph->resample_lavr_opts = av_strdup(args);
996 
997  e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
998  if (e)
999  av_opt_set(fg->graph, "threads", e->value, 0);
1000  }
1001 
1002  if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1003  return ret;
1004 
1005  if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1006  const char *num_inputs;
1007  const char *num_outputs;
1008  if (!outputs) {
1009  num_outputs = "0";
1010  } else if (outputs->next) {
1011  num_outputs = ">1";
1012  } else {
1013  num_outputs = "1";
1014  }
1015  if (!inputs) {
1016  num_inputs = "0";
1017  } else if (inputs->next) {
1018  num_inputs = ">1";
1019  } else {
1020  num_inputs = "1";
1021  }
1022  av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1023  "to have exactly 1 input and 1 output."
1024  " However, it had %s input(s) and %s output(s)."
1025  " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1026  graph_desc, num_inputs, num_outputs);
1027  return AVERROR(EINVAL);
1028  }
1029 
1030  for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1031  if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1032  avfilter_inout_free(&inputs);
1033  avfilter_inout_free(&outputs);
1034  return ret;
1035  }
1036  avfilter_inout_free(&inputs);
1037 
1038  for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1039  configure_output_filter(fg, fg->outputs[i], cur);
1040  avfilter_inout_free(&outputs);
1041 
1042  if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1043  return ret;
1044 
1045  fg->reconfiguration = 1;
1046 
1047  for (i = 0; i < fg->nb_outputs; i++) {
1048  OutputStream *ost = fg->outputs[i]->ost;
1049  if (ost &&
1050  ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1053  ost->enc_ctx->frame_size);
1054  }
1055 
1056  return 0;
1057 }
1058 
1060 {
1061  int i;
1062  for (i = 0; i < fg->nb_inputs; i++)
1063  if (fg->inputs[i]->ist == ist)
1064  return 1;
1065  return 0;
1066 }
1067 
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags)
Enable or disable automatic format conversion inside the graph.
#define NULL
Definition: coverity.c:32
int keep_pix_fmt
Definition: ffmpeg.h:449
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
int64_t recording_time
desired length of the resulting file in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:476
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
uint8_t * name
Definition: ffmpeg.h:230
int nb_outputs
Definition: ffmpeg.h:247
AVDictionary * swr_opts
Definition: ffmpeg.h:437
#define DECODING_FOR_FILTER
Definition: ffmpeg.h:257
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1146
AVRational frame_rate
Definition: ffmpeg.h:408
double get_rotation(AVStream *st)
Definition: cmdutils.c:2024
int accurate_seek
Definition: ffmpeg.h:355
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
misc image utilities
AVFilterGraph * avfilter_graph_alloc(void)
Allocate a filter graph.
Definition: avfiltergraph.c:76
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
Main libavfilter public API header.
AVRational framerate
Definition: ffmpeg.h:280
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
Check validity and configure all the links and formats in the graph.
void avfilter_inout_free(AVFilterInOut **inout)
Free the supplied list of AVFilterInOut and set *inout to NULL.
Definition: graphparser.c:187
struct AVFilterInOut * next
next input/input in the list, NULL if this is the last
Definition: avfilter.h:1366
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the given stream matches a stream specifier.
Definition: cmdutils.c:1920
AVFilterInOut * out_tmp
Definition: ffmpeg.h:233
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1009
int decoding_needed
Definition: ffmpeg.h:255
static int insert_trim(int64_t start_time, int64_t duration, AVFilterContext **last_filter, int *pad_idx, const char *filter_name)
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:914
int num
numerator
Definition: rational.h:44
FilterGraph * init_simple_filtergraph(InputStream *ist, OutputStream *ost)
static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
int index
stream index in AVFormatContext
Definition: avformat.h:843
int init_complex_filtergraph(FilterGraph *fg)
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1902
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name)
enum AVMediaType type
Definition: avcodec.h:3485
int nb_input_streams
Definition: ffmpeg.c:141
AVCodec.
Definition: avcodec.h:3472
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1134
int64_t start_time
start time in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:477
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
int index
Definition: ffmpeg.h:238
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:1182
struct FilterGraph * graph
Definition: ffmpeg.h:222
Format I/O context.
Definition: avformat.h:1273
AVRational av_guess_frame_rate(AVFormatContext *ctx, AVStream *stream, AVFrame *frame)
Guess the frame rate, based on both the container and codec information.
Definition: utils.c:4288
#define SWS_BILINEAR
Definition: swscale.h:57
int configure_filtergraph(FilterGraph *fg)
memory buffer sink API for audio and video
enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
Definition: ffmpeg_filter.c:41
struct InputStream * ist
Definition: ffmpeg.h:221
char * name
name of this filter instance
Definition: avfilter.h:638
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:482
AVFilterGraph * graph
Definition: ffmpeg.h:241
supported_samplerates
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:131
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:647
static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
static int64_t start_time
Definition: ffplay.c:325
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2270
uint8_t
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
AVDictionary * sws_dict
Definition: ffmpeg.h:436
AVOptions.
static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
int audio_sync_method
Definition: ffmpeg_opt.c:93
int shortest
Definition: ffmpeg.h:480
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1341
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, const AVFilter *filt, const char *name, const char *args, void *opaque, AVFilterGraph *graph_ctx)
Create and add a filter instance into an existing graph.
char * resample_lavr_opts
libavresample options to use for the auto-inserted resample filters
Definition: avfilter.h:1183
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
AVDictionary * resample_opts
Definition: ffmpeg.h:438
AVFilterContext * filter
Definition: ffmpeg.h:227
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:76
int nb_input_files
Definition: ffmpeg.c:143
AVCodec * dec
Definition: ffmpeg.h:260
static int64_t duration
Definition: ffplay.c:326
int avfilter_graph_parse2(AVFilterGraph *graph, const char *filters, AVFilterInOut **inputs, AVFilterInOut **outputs)
Add a graph described by a string to a graph.
Definition: graphparser.c:391
int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
int file_index
Definition: ffmpeg.h:251
struct InputStream::sub2video sub2video
int resample_pix_fmt
Definition: ffmpeg.h:287
int resample_height
Definition: ffmpeg.h:285
#define av_log(a,...)
static int insert_filter(AVFilterContext **last_filter, int *pad_idx, const char *filter_name, const char *args)
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:640
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define GET_CH_LAYOUT_NAME(ch_layout)
Definition: cmdutils.h:580
FilterGraph ** filtergraphs
Definition: ffmpeg.c:150
AVFilterContext * filter
Definition: ffmpeg.h:220
#define AVERROR(e)
Definition: error.h:43
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:97
int capabilities
Codec capabilities.
Definition: avcodec.h:3491
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1597
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:491
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3479
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
#define FFMAX(a, b)
Definition: common.h:79
#define fail()
Definition: checkasm.h:57
static const int sample_rates[]
Definition: dcaenc.h:32
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE
Audio encoder supports receiving a different number of samples in each call.
Definition: avcodec.h:936
static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2323
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
OutputFilter * filter
Definition: ffmpeg.h:430
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:487
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1329
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
audio channel layout utility functions
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3493
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:788
external API header
all automatic conversions disabled
Definition: avfilter.h:1328
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:75
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:611
struct OutputStream * ost
Definition: ffmpeg.h:228
int width
picture width / height.
Definition: avcodec.h:1681
char * apad
Definition: ffmpeg.h:440
AVS_Value args
Definition: avisynth_c.h:562
int nb_filtergraphs
Definition: ffmpeg.c:151
int(* hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame)
Definition: ffmpeg.h:326
int audio_channels_mapped
Definition: ffmpeg.h:425
#define GET_SAMPLE_FMT_NAME(sample_fmt)
Definition: cmdutils.h:573
AVFilterContext * filter_ctx
filter context associated to this input/output
Definition: avfilter.h:1360
void exit_program(int ret)
Wraps exit with a program-specific cleanup routine.
Definition: cmdutils.c:116
int start_at_zero
Definition: ffmpeg_opt.c:102
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:885
int audio_volume
Definition: ffmpeg_opt.c:92
Stream structure.
Definition: avformat.h:842
A linked-list of the inputs/outputs of the filter chain.
Definition: avfilter.h:1355
InputFilter ** filters
Definition: ffmpeg.h:312
enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Definition: imgconvert.c:58
#define GET_SAMPLE_RATE_NAME(rate)
Definition: cmdutils.h:576
int64_t recording_time
Definition: ffmpeg.h:350
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2282
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2824
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define AV_BPRINT_SIZE_AUTOMATIC
static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
enum AVMediaType codec_type
Definition: avcodec.h:1510
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
enum AVCodecID codec_id
Definition: avcodec.h:1519
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
int sample_rate
samples per second
Definition: avcodec.h:2262
static char * choose_pix_fmts(OutputStream *ost)
int ist_index
Definition: ffmpeg.h:344
const char * graph_desc
Definition: ffmpeg.h:239
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
int64_t start_time
Definition: ffmpeg.h:348
main external API structure.
Definition: avcodec.h:1502
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:357
static int sub2video_prepare(InputStream *ist)
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
AVCodecContext * enc_ctx
Definition: ffmpeg.h:399
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg)
GLint GLenum type
Definition: opengl_enc.c:105
AVCodecContext * dec_ctx
Definition: ffmpeg.h:259
AVStream * st
Definition: ffmpeg.h:252
int * audio_channels_map
Definition: ffmpeg.h:424
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
int pad_idx
index of the filt_ctx pad to use for linking
Definition: avfilter.h:1363
rational number numerator/denominator
Definition: rational.h:43
int file_index
Definition: ffmpeg.h:383
AVMediaType
Definition: avutil.h:191
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
int autorotate
Definition: ffmpeg.h:284
#define snprintf
Definition: snprintf.h:34
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
float audio_drift_threshold
Definition: ffmpeg_opt.c:88
char * name
unique name for this input/output in the list
Definition: avfilter.h:1357
int nb_filters
Definition: ffmpeg.h:313
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
#define SWS_BITEXACT
Definition: swscale.h:82
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1358
#define AVERROR_FILTER_NOT_FOUND
Filter not found.
Definition: error.h:58
int resample_width
Definition: ffmpeg.h:286
int reconfiguration
Definition: ffmpeg.h:242
struct FilterGraph * graph
Definition: ffmpeg.h:229
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:261
#define DESCRIBE_FILTER_LINK(f, inout, in)
AVStream * st
Definition: muxing.c:54
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
Definition: avcodec.h:944
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:77
char * key
Definition: dict.h:87
int den
denominator
Definition: rational.h:45
int copy_ts
Definition: ffmpeg_opt.c:101
AVFormatContext * ctx
Definition: ffmpeg.h:341
AVCodec * enc
Definition: ffmpeg.h:400
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int do_deinterlace
Definition: ffmpeg_opt.c:96
#define GROW_ARRAY(array, nb_elems)
Definition: cmdutils.h:567
pixel format definitions
char * avfilter
Definition: ffmpeg.h:431
uint8_t * name
Definition: ffmpeg.h:223
char * value
Definition: dict.h:88
int len
AVFilterContext * avfilter_graph_alloc_filter(AVFilterGraph *graph, const AVFilter *filter, const char *name)
Create a new filter instance in a filter graph.
int channels
number of audio channels
Definition: avcodec.h:2263
OutputFilter ** outputs
Definition: ffmpeg.h:246
InputFile ** input_files
Definition: ffmpeg.c:142
AVFormatContext * ctx
Definition: ffmpeg.h:473
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
An instance of a filter.
Definition: avfilter.h:633
AVDictionary * encoder_opts
Definition: ffmpeg.h:435
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
InputFilter ** inputs
Definition: ffmpeg.h:244
#define av_freep(p)
enum AVPixelFormat hwaccel_retrieved_pix_fmt
Definition: ffmpeg.h:328
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:72
OutputFile ** output_files
Definition: ffmpeg.c:147
#define AV_LOG_FATAL
Something went wrong and recovery is not possible.
Definition: log.h:170
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3495
int discard
Definition: ffmpeg.h:253
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:2050
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:884
void choose_sample_fmt(AVStream *st, AVCodec *codec)
Definition: ffmpeg_filter.c:79
int nb_inputs
Definition: ffmpeg.h:245
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:907
int index
Definition: ffmpeg.h:384
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
enum AVMediaType type
Definition: ffmpeg.h:234
#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg)
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:369
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int strict_std_compliance
strictly follow the standard (MPEG4, ...).
Definition: avcodec.h:2820
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#define tb
Definition: regdef.h:68
InputStream ** input_streams
Definition: ffmpeg.c:140
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
discard nothing
Definition: avcodec.h:683
const char * name
Definition: opengl_enc.c:103