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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 #include "libavfilter/buffersrc.h"
28 
30 
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
41 
42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
43 {
44  static const enum AVPixelFormat mjpeg_formats[] =
48  static const enum AVPixelFormat ljpeg_formats[] =
53 
54  if (codec_id == AV_CODEC_ID_MJPEG) {
55  return mjpeg_formats;
56  } else if (codec_id == AV_CODEC_ID_LJPEG) {
57  return ljpeg_formats;
58  } else {
59  return default_formats;
60  }
61 }
62 
64 {
65  if (codec && codec->pix_fmts) {
66  const enum AVPixelFormat *p = codec->pix_fmts;
68  int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69  enum AVPixelFormat best= AV_PIX_FMT_NONE;
70 
73  }
74  for (; *p != AV_PIX_FMT_NONE; p++) {
75  best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
76  if (*p == target)
77  break;
78  }
79  if (*p == AV_PIX_FMT_NONE) {
80  if (target != AV_PIX_FMT_NONE)
82  "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83  av_get_pix_fmt_name(target),
84  codec->name,
85  av_get_pix_fmt_name(best));
86  return best;
87  }
88  }
89  return target;
90 }
91 
93 {
94  if (codec && codec->sample_fmts) {
95  const enum AVSampleFormat *p = codec->sample_fmts;
96  for (; *p != -1; p++) {
97  if (*p == st->codec->sample_fmt)
98  break;
99  }
100  if (*p == -1) {
101  if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
102  av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
103  if(av_get_sample_fmt_name(st->codec->sample_fmt))
105  "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
106  av_get_sample_fmt_name(st->codec->sample_fmt),
107  codec->name,
109  st->codec->sample_fmt = codec->sample_fmts[0];
110  }
111  }
112 }
113 
114 static char *choose_pix_fmts(OutputStream *ost)
115 {
116  AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
117  if (strict_dict)
118  // used by choose_pixel_fmt() and below
119  av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
120 
121  if (ost->keep_pix_fmt) {
122  if (ost->filter)
125  if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
126  return NULL;
128  }
129  if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130  return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131  } else if (ost->enc && ost->enc->pix_fmts) {
132  const enum AVPixelFormat *p;
133  AVIOContext *s = NULL;
134  uint8_t *ret;
135  int len;
136 
137  if (avio_open_dyn_buf(&s) < 0)
138  exit_program(1);
139 
140  p = ost->enc->pix_fmts;
143  }
144 
145  for (; *p != AV_PIX_FMT_NONE; p++) {
146  const char *name = av_get_pix_fmt_name(*p);
147  avio_printf(s, "%s|", name);
148  }
149  len = avio_close_dyn_buf(s, &ret);
150  ret[len - 1] = 0;
151  return ret;
152  } else
153  return NULL;
154 }
155 
156 /* Define a function for building a string containing a list of
157  * allowed formats. */
158 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
159 static char *choose_ ## var ## s(OutputStream *ost) \
160 { \
161  if (ost->enc_ctx->var != none) { \
162  get_name(ost->enc_ctx->var); \
163  return av_strdup(name); \
164  } else if (ost->enc && ost->enc->supported_list) { \
165  const type *p; \
166  AVIOContext *s = NULL; \
167  uint8_t *ret; \
168  int len; \
169  \
170  if (avio_open_dyn_buf(&s) < 0) \
171  exit_program(1); \
172  \
173  for (p = ost->enc->supported_list; *p != none; p++) { \
174  get_name(*p); \
175  avio_printf(s, "%s|", name); \
176  } \
177  len = avio_close_dyn_buf(s, &ret); \
178  ret[len - 1] = 0; \
179  return ret; \
180  } else \
181  return NULL; \
182 }
183 
184 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
185 // GET_PIX_FMT_NAME)
186 
189 
192 
193 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
195 
197 {
198  FilterGraph *fg = av_mallocz(sizeof(*fg));
199 
200  if (!fg)
201  exit_program(1);
202  fg->index = nb_filtergraphs;
203 
204  GROW_ARRAY(fg->outputs, fg->nb_outputs);
205  if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
206  exit_program(1);
207  fg->outputs[0]->ost = ost;
208  fg->outputs[0]->graph = fg;
209 
210  ost->filter = fg->outputs[0];
211 
212  GROW_ARRAY(fg->inputs, fg->nb_inputs);
213  if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
214  exit_program(1);
215  fg->inputs[0]->ist = ist;
216  fg->inputs[0]->graph = fg;
217 
218  GROW_ARRAY(ist->filters, ist->nb_filters);
219  ist->filters[ist->nb_filters - 1] = fg->inputs[0];
220 
222  filtergraphs[nb_filtergraphs - 1] = fg;
223 
224  return 0;
225 }
226 
228 {
229  InputStream *ist = NULL;
231  int i;
232 
233  // TODO: support other filter types
234  if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
235  av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
236  "currently.\n");
237  exit_program(1);
238  }
239 
240  if (in->name) {
242  AVStream *st = NULL;
243  char *p;
244  int file_idx = strtol(in->name, &p, 0);
245 
246  if (file_idx < 0 || file_idx >= nb_input_files) {
247  av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
248  file_idx, fg->graph_desc);
249  exit_program(1);
250  }
251  s = input_files[file_idx]->ctx;
252 
253  for (i = 0; i < s->nb_streams; i++) {
254  enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
255  if (stream_type != type &&
256  !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
257  type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
258  continue;
259  if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
260  st = s->streams[i];
261  break;
262  }
263  }
264  if (!st) {
265  av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
266  "matches no streams.\n", p, fg->graph_desc);
267  exit_program(1);
268  }
269  ist = input_streams[input_files[file_idx]->ist_index + st->index];
270  } else {
271  /* find the first unused stream of corresponding type */
272  for (i = 0; i < nb_input_streams; i++) {
273  ist = input_streams[i];
274  if (ist->dec_ctx->codec_type == type && ist->discard)
275  break;
276  }
277  if (i == nb_input_streams) {
278  av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
279  "unlabeled input pad %d on filter %s\n", in->pad_idx,
280  in->filter_ctx->name);
281  exit_program(1);
282  }
283  }
284  av_assert0(ist);
285 
286  ist->discard = 0;
288  ist->st->discard = AVDISCARD_NONE;
289 
290  GROW_ARRAY(fg->inputs, fg->nb_inputs);
291  if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
292  exit_program(1);
293  fg->inputs[fg->nb_inputs - 1]->ist = ist;
294  fg->inputs[fg->nb_inputs - 1]->graph = fg;
295 
296  GROW_ARRAY(ist->filters, ist->nb_filters);
297  ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
298 }
299 
301 {
302  AVFilterInOut *inputs, *outputs, *cur;
303  AVFilterGraph *graph;
304  int ret = 0;
305 
306  /* this graph is only used for determining the kinds of inputs
307  * and outputs we have, and is discarded on exit from this function */
308  graph = avfilter_graph_alloc();
309  if (!graph)
310  return AVERROR(ENOMEM);
311 
312  ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
313  if (ret < 0)
314  goto fail;
315 
316  for (cur = inputs; cur; cur = cur->next)
317  init_input_filter(fg, cur);
318 
319  for (cur = outputs; cur;) {
320  GROW_ARRAY(fg->outputs, fg->nb_outputs);
321  fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
322  if (!fg->outputs[fg->nb_outputs - 1])
323  exit_program(1);
324 
325  fg->outputs[fg->nb_outputs - 1]->graph = fg;
326  fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
328  cur->pad_idx);
329  cur = cur->next;
330  fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
331  }
332 
333 fail:
334  avfilter_inout_free(&inputs);
335  avfilter_graph_free(&graph);
336  return ret;
337 }
338 
339 static int insert_trim(int64_t start_time, int64_t duration,
340  AVFilterContext **last_filter, int *pad_idx,
341  const char *filter_name)
342 {
343  AVFilterGraph *graph = (*last_filter)->graph;
345  const AVFilter *trim;
346  enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
347  const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
348  int ret = 0;
349 
350  if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
351  return 0;
352 
353  trim = avfilter_get_by_name(name);
354  if (!trim) {
355  av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
356  "recording time.\n", name);
358  }
359 
360  ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
361  if (!ctx)
362  return AVERROR(ENOMEM);
363 
364  if (duration != INT64_MAX) {
365  ret = av_opt_set_int(ctx, "durationi", duration,
367  }
368  if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
369  ret = av_opt_set_int(ctx, "starti", start_time,
371  }
372  if (ret < 0) {
373  av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
374  return ret;
375  }
376 
377  ret = avfilter_init_str(ctx, NULL);
378  if (ret < 0)
379  return ret;
380 
381  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
382  if (ret < 0)
383  return ret;
384 
385  *last_filter = ctx;
386  *pad_idx = 0;
387  return 0;
388 }
389 
390 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
391  const char *filter_name, const char *args)
392 {
393  AVFilterGraph *graph = (*last_filter)->graph;
395  int ret;
396 
397  ret = avfilter_graph_create_filter(&ctx,
398  avfilter_get_by_name(filter_name),
399  filter_name, args, NULL, graph);
400  if (ret < 0)
401  return ret;
402 
403  ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
404  if (ret < 0)
405  return ret;
406 
407  *last_filter = ctx;
408  *pad_idx = 0;
409  return 0;
410 }
411 
413 {
414  char *pix_fmts;
415  OutputStream *ost = ofilter->ost;
416  OutputFile *of = output_files[ost->file_index];
417  AVCodecContext *codec = ost->enc_ctx;
419  int pad_idx = out->pad_idx;
420  int ret;
421  char name[255];
422 
423  snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
424  ret = avfilter_graph_create_filter(&ofilter->filter,
425  avfilter_get_by_name("buffersink"),
426  name, NULL, NULL, fg->graph);
427 
428  if (ret < 0)
429  return ret;
430 
431  if (!hw_device_ctx && (codec->width || codec->height)) {
432  char args[255];
434  AVDictionaryEntry *e = NULL;
435 
436  snprintf(args, sizeof(args), "%d:%d",
437  codec->width,
438  codec->height);
439 
440  while ((e = av_dict_get(ost->sws_dict, "", e,
442  av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
443  }
444 
445  snprintf(name, sizeof(name), "scaler for output stream %d:%d",
446  ost->file_index, ost->index);
447  if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
448  name, args, NULL, fg->graph)) < 0)
449  return ret;
450  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
451  return ret;
452 
453  last_filter = filter;
454  pad_idx = 0;
455  }
456 
457  if ((pix_fmts = choose_pix_fmts(ost))) {
459  snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
460  ost->file_index, ost->index);
461  ret = avfilter_graph_create_filter(&filter,
462  avfilter_get_by_name("format"),
463  "format", pix_fmts, NULL, fg->graph);
464  av_freep(&pix_fmts);
465  if (ret < 0)
466  return ret;
467  if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
468  return ret;
469 
470  last_filter = filter;
471  pad_idx = 0;
472  }
473 
474  if (ost->frame_rate.num && 0) {
475  AVFilterContext *fps;
476  char args[255];
477 
478  snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
479  ost->frame_rate.den);
480  snprintf(name, sizeof(name), "fps for output stream %d:%d",
481  ost->file_index, ost->index);
483  name, args, NULL, fg->graph);
484  if (ret < 0)
485  return ret;
486 
487  ret = avfilter_link(last_filter, pad_idx, fps, 0);
488  if (ret < 0)
489  return ret;
490  last_filter = fps;
491  pad_idx = 0;
492  }
493 
494  snprintf(name, sizeof(name), "trim for output stream %d:%d",
495  ost->file_index, ost->index);
496  ret = insert_trim(of->start_time, of->recording_time,
497  &last_filter, &pad_idx, name);
498  if (ret < 0)
499  return ret;
500 
501 
502  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
503  return ret;
504 
505  return 0;
506 }
507 
509 {
510  OutputStream *ost = ofilter->ost;
511  OutputFile *of = output_files[ost->file_index];
512  AVCodecContext *codec = ost->enc_ctx;
514  int pad_idx = out->pad_idx;
516  char name[255];
517  int ret;
518 
519  snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
520  ret = avfilter_graph_create_filter(&ofilter->filter,
521  avfilter_get_by_name("abuffersink"),
522  name, NULL, NULL, fg->graph);
523  if (ret < 0)
524  return ret;
525  if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
526  return ret;
527 
528 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
529  AVFilterContext *filt_ctx; \
530  \
531  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
532  "similarly to -af " filter_name "=%s.\n", arg); \
533  \
534  ret = avfilter_graph_create_filter(&filt_ctx, \
535  avfilter_get_by_name(filter_name), \
536  filter_name, arg, NULL, fg->graph); \
537  if (ret < 0) \
538  return ret; \
539  \
540  ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
541  if (ret < 0) \
542  return ret; \
543  \
544  last_filter = filt_ctx; \
545  pad_idx = 0; \
546 } while (0)
547  if (ost->audio_channels_mapped) {
548  int i;
549  AVBPrint pan_buf;
550  av_bprint_init(&pan_buf, 256, 8192);
551  av_bprintf(&pan_buf, "0x%"PRIx64,
553  for (i = 0; i < ost->audio_channels_mapped; i++)
554  if (ost->audio_channels_map[i] != -1)
555  av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
556 
557  AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
558  av_bprint_finalize(&pan_buf, NULL);
559  }
560 
561  if (codec->channels && !codec->channel_layout)
563 
564  sample_fmts = choose_sample_fmts(ost);
565  sample_rates = choose_sample_rates(ost);
566  channel_layouts = choose_channel_layouts(ost);
567  if (sample_fmts || sample_rates || channel_layouts) {
569  char args[256];
570  args[0] = 0;
571 
572  if (sample_fmts)
573  av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
574  sample_fmts);
575  if (sample_rates)
576  av_strlcatf(args, sizeof(args), "sample_rates=%s:",
577  sample_rates);
578  if (channel_layouts)
579  av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
580  channel_layouts);
581 
582  av_freep(&sample_fmts);
583  av_freep(&sample_rates);
584  av_freep(&channel_layouts);
585 
586  snprintf(name, sizeof(name), "audio format for output stream %d:%d",
587  ost->file_index, ost->index);
588  ret = avfilter_graph_create_filter(&format,
589  avfilter_get_by_name("aformat"),
590  name, args, NULL, fg->graph);
591  if (ret < 0)
592  return ret;
593 
594  ret = avfilter_link(last_filter, pad_idx, format, 0);
595  if (ret < 0)
596  return ret;
597 
598  last_filter = format;
599  pad_idx = 0;
600  }
601 
602  if (audio_volume != 256 && 0) {
603  char args[256];
604 
605  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
606  AUTO_INSERT_FILTER("-vol", "volume", args);
607  }
608 
609  if (ost->apad && of->shortest) {
610  char args[256];
611  int i;
612 
613  for (i=0; i<of->ctx->nb_streams; i++)
614  if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
615  break;
616 
617  if (i<of->ctx->nb_streams) {
618  snprintf(args, sizeof(args), "%s", ost->apad);
619  AUTO_INSERT_FILTER("-apad", "apad", args);
620  }
621  }
622 
623  snprintf(name, sizeof(name), "trim for output stream %d:%d",
624  ost->file_index, ost->index);
625  ret = insert_trim(of->start_time, of->recording_time,
626  &last_filter, &pad_idx, name);
627  if (ret < 0)
628  return ret;
629 
630  if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
631  return ret;
632 
633  return 0;
634 }
635 
636 #define DESCRIBE_FILTER_LINK(f, inout, in) \
637 { \
638  AVFilterContext *ctx = inout->filter_ctx; \
639  AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
640  int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
641  AVIOContext *pb; \
642  \
643  if (avio_open_dyn_buf(&pb) < 0) \
644  exit_program(1); \
645  \
646  avio_printf(pb, "%s", ctx->filter->name); \
647  if (nb_pads > 1) \
648  avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
649  avio_w8(pb, 0); \
650  avio_close_dyn_buf(pb, &f->name); \
651 }
652 
654 {
655  av_freep(&ofilter->name);
656  DESCRIBE_FILTER_LINK(ofilter, out, 0);
657 
658  if (!ofilter->ost) {
659  av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
660  exit_program(1);
661  }
662 
663  switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
664  case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
665  case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
666  default: av_assert0(0);
667  }
668 }
669 
671 {
673  int i, w, h;
674 
675  /* Compute the size of the canvas for the subtitles stream.
676  If the subtitles codec has set a size, use it. Otherwise use the
677  maximum dimensions of the video streams in the same file. */
678  w = ist->dec_ctx->width;
679  h = ist->dec_ctx->height;
680  if (!(w && h)) {
681  for (i = 0; i < avf->nb_streams; i++) {
682  if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
683  w = FFMAX(w, avf->streams[i]->codec->width);
684  h = FFMAX(h, avf->streams[i]->codec->height);
685  }
686  }
687  if (!(w && h)) {
688  w = FFMAX(w, 720);
689  h = FFMAX(h, 576);
690  }
691  av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
692  }
693  ist->sub2video.w = ist->resample_width = w;
694  ist->sub2video.h = ist->resample_height = h;
695 
696  /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
697  palettes for all rectangles are identical or compatible */
699 
700  ist->sub2video.frame = av_frame_alloc();
701  if (!ist->sub2video.frame)
702  return AVERROR(ENOMEM);
703  ist->sub2video.last_pts = INT64_MIN;
704  return 0;
705 }
706 
708  AVFilterInOut *in)
709 {
711  const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
712  InputStream *ist = ifilter->ist;
713  InputFile *f = input_files[ist->file_index];
714  AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
715  ist->st->time_base;
716  AVRational fr = ist->framerate;
717  AVRational sar;
718  AVBPrint args;
719  char name[255];
720  int ret, pad_idx = 0;
721  int64_t tsoffset = 0;
723 
724  if (!par)
725  return AVERROR(ENOMEM);
726  memset(par, 0, sizeof(*par));
727  par->format = AV_PIX_FMT_NONE;
728 
729  if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
730  av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
731  ret = AVERROR(EINVAL);
732  goto fail;
733  }
734 
735  if (!fr.num)
736  fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
737 
739  ret = sub2video_prepare(ist);
740  if (ret < 0)
741  goto fail;
742  }
743 
744  sar = ist->st->sample_aspect_ratio.num ?
745  ist->st->sample_aspect_ratio :
747  if(!sar.den)
748  sar = (AVRational){0,1};
749  av_bprint_init(&args, 0, 1);
750  av_bprintf(&args,
751  "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
752  "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
753  ist->resample_height,
755  tb.num, tb.den, sar.num, sar.den,
757  if (fr.num && fr.den)
758  av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
759  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
760  ist->file_index, ist->st->index);
761 
762 
763  if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
764  args.str, NULL, fg->graph)) < 0)
765  goto fail;
766  par->hw_frames_ctx = ist->hw_frames_ctx;
767  ret = av_buffersrc_parameters_set(ifilter->filter, par);
768  if (ret < 0)
769  goto fail;
770  av_freep(&par);
771  last_filter = ifilter->filter;
772 
773  if (ist->autorotate) {
774  double theta = get_rotation(ist->st);
775 
776  if (fabs(theta - 90) < 1.0) {
777  ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
778  } else if (fabs(theta - 180) < 1.0) {
779  ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
780  if (ret < 0)
781  return ret;
782  ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
783  } else if (fabs(theta - 270) < 1.0) {
784  ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
785  } else if (fabs(theta) > 1.0) {
786  char rotate_buf[64];
787  snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
788  ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
789  }
790  if (ret < 0)
791  return ret;
792  }
793 
794  if (ist->framerate.num) {
795  AVFilterContext *setpts;
796 
797  snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
798  ist->file_index, ist->st->index);
799  if ((ret = avfilter_graph_create_filter(&setpts,
800  avfilter_get_by_name("setpts"),
801  name, "N", NULL,
802  fg->graph)) < 0)
803  return ret;
804 
805  if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
806  return ret;
807 
808  last_filter = setpts;
809  }
810 
811  if (do_deinterlace) {
812  AVFilterContext *yadif;
813 
814  snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
815  ist->file_index, ist->st->index);
816  if ((ret = avfilter_graph_create_filter(&yadif,
817  avfilter_get_by_name("yadif"),
818  name, "", NULL,
819  fg->graph)) < 0)
820  return ret;
821 
822  if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
823  return ret;
824 
825  last_filter = yadif;
826  }
827 
828  snprintf(name, sizeof(name), "trim for input stream %d:%d",
829  ist->file_index, ist->st->index);
830  if (copy_ts) {
831  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
833  tsoffset += f->ctx->start_time;
834  }
835  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
836  AV_NOPTS_VALUE : tsoffset, f->recording_time,
837  &last_filter, &pad_idx, name);
838  if (ret < 0)
839  return ret;
840 
841  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
842  return ret;
843  return 0;
844 fail:
845  av_freep(&par);
846 
847  return ret;
848 }
849 
851  AVFilterInOut *in)
852 {
854  const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
855  InputStream *ist = ifilter->ist;
856  InputFile *f = input_files[ist->file_index];
857  AVBPrint args;
858  char name[255];
859  int ret, pad_idx = 0;
860  int64_t tsoffset = 0;
861 
862  if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
863  av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
864  return AVERROR(EINVAL);
865  }
866 
868  av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
869  1, ist->dec_ctx->sample_rate,
870  ist->dec_ctx->sample_rate,
872  if (ist->dec_ctx->channel_layout)
873  av_bprintf(&args, ":channel_layout=0x%"PRIx64,
874  ist->dec_ctx->channel_layout);
875  else
876  av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
877  snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
878  ist->file_index, ist->st->index);
879 
880  if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
881  name, args.str, NULL,
882  fg->graph)) < 0)
883  return ret;
884  last_filter = ifilter->filter;
885 
886 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
887  AVFilterContext *filt_ctx; \
888  \
889  av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
890  "similarly to -af " filter_name "=%s.\n", arg); \
891  \
892  snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
893  fg->index, filter_name, ist->file_index, ist->st->index); \
894  ret = avfilter_graph_create_filter(&filt_ctx, \
895  avfilter_get_by_name(filter_name), \
896  name, arg, NULL, fg->graph); \
897  if (ret < 0) \
898  return ret; \
899  \
900  ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
901  if (ret < 0) \
902  return ret; \
903  \
904  last_filter = filt_ctx; \
905 } while (0)
906 
907  if (audio_sync_method > 0) {
908  char args[256] = {0};
909 
910  av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
911  if (audio_drift_threshold != 0.1)
912  av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
913  if (!fg->reconfiguration)
914  av_strlcatf(args, sizeof(args), ":first_pts=0");
915  AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
916  }
917 
918 // if (ost->audio_channels_mapped) {
919 // int i;
920 // AVBPrint pan_buf;
921 // av_bprint_init(&pan_buf, 256, 8192);
922 // av_bprintf(&pan_buf, "0x%"PRIx64,
923 // av_get_default_channel_layout(ost->audio_channels_mapped));
924 // for (i = 0; i < ost->audio_channels_mapped; i++)
925 // if (ost->audio_channels_map[i] != -1)
926 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
927 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
928 // av_bprint_finalize(&pan_buf, NULL);
929 // }
930 
931  if (audio_volume != 256) {
932  char args[256];
933 
934  av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
935  "audio filter instead.\n");
936 
937  snprintf(args, sizeof(args), "%f", audio_volume / 256.);
938  AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
939  }
940 
941  snprintf(name, sizeof(name), "trim for input stream %d:%d",
942  ist->file_index, ist->st->index);
943  if (copy_ts) {
944  tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
946  tsoffset += f->ctx->start_time;
947  }
948  ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
949  AV_NOPTS_VALUE : tsoffset, f->recording_time,
950  &last_filter, &pad_idx, name);
951  if (ret < 0)
952  return ret;
953 
954  if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
955  return ret;
956 
957  return 0;
958 }
959 
961  AVFilterInOut *in)
962 {
963  av_freep(&ifilter->name);
964  DESCRIBE_FILTER_LINK(ifilter, in, 1);
965 
966  if (!ifilter->ist->dec) {
968  "No decoder for stream #%d:%d, filtering impossible\n",
969  ifilter->ist->file_index, ifilter->ist->st->index);
971  }
972  switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
973  case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
974  case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
975  default: av_assert0(0);
976  }
977 }
978 
980 {
981  AVFilterInOut *inputs, *outputs, *cur;
982  int ret, i, simple = filtergraph_is_simple(fg);
983  const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
984  fg->graph_desc;
985 
987  if (!(fg->graph = avfilter_graph_alloc()))
988  return AVERROR(ENOMEM);
989 
990  if (simple) {
991  OutputStream *ost = fg->outputs[0]->ost;
992  char args[512];
993  AVDictionaryEntry *e = NULL;
994 
995  args[0] = 0;
996  while ((e = av_dict_get(ost->sws_dict, "", e,
998  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
999  }
1000  if (strlen(args))
1001  args[strlen(args)-1] = 0;
1002  fg->graph->scale_sws_opts = av_strdup(args);
1003 
1004  args[0] = 0;
1005  while ((e = av_dict_get(ost->swr_opts, "", e,
1007  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1008  }
1009  if (strlen(args))
1010  args[strlen(args)-1] = 0;
1011  av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1012 
1013  args[0] = '\0';
1014  while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1016  av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1017  }
1018  if (strlen(args))
1019  args[strlen(args) - 1] = '\0';
1020  fg->graph->resample_lavr_opts = av_strdup(args);
1021 
1022  e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1023  if (e)
1024  av_opt_set(fg->graph, "threads", e->value, 0);
1025  }
1026 
1027  if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1028  return ret;
1029 
1030  if (hw_device_ctx) {
1031  for (i = 0; i < fg->graph->nb_filters; i++) {
1033  }
1034  }
1035 
1036  if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1037  const char *num_inputs;
1038  const char *num_outputs;
1039  if (!outputs) {
1040  num_outputs = "0";
1041  } else if (outputs->next) {
1042  num_outputs = ">1";
1043  } else {
1044  num_outputs = "1";
1045  }
1046  if (!inputs) {
1047  num_inputs = "0";
1048  } else if (inputs->next) {
1049  num_inputs = ">1";
1050  } else {
1051  num_inputs = "1";
1052  }
1053  av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1054  "to have exactly 1 input and 1 output."
1055  " However, it had %s input(s) and %s output(s)."
1056  " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1057  graph_desc, num_inputs, num_outputs);
1058  return AVERROR(EINVAL);
1059  }
1060 
1061  for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1062  if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1063  avfilter_inout_free(&inputs);
1064  avfilter_inout_free(&outputs);
1065  return ret;
1066  }
1067  avfilter_inout_free(&inputs);
1068 
1069  for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1070  configure_output_filter(fg, fg->outputs[i], cur);
1071  avfilter_inout_free(&outputs);
1072 
1073  if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1074  return ret;
1075 
1076  fg->reconfiguration = 1;
1077 
1078  for (i = 0; i < fg->nb_outputs; i++) {
1079  OutputStream *ost = fg->outputs[i]->ost;
1080  if (!ost->enc) {
1081  /* identical to the same check in ffmpeg.c, needed because
1082  complex filter graphs are initialized earlier */
1083  av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1084  avcodec_get_name(ost->st->codec->codec_id), ost->file_index, ost->index);
1085  return AVERROR(EINVAL);
1086  }
1087  if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1088  !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1090  ost->enc_ctx->frame_size);
1091  }
1092 
1093  return 0;
1094 }
1095 
1097 {
1098  int i;
1099  for (i = 0; i < fg->nb_inputs; i++)
1100  if (fg->inputs[i]->ist == ist)
1101  return 1;
1102  return 0;
1103 }
1104 
1106 {
1107  return !fg->graph_desc;
1108 }
AVFilterContext ** filters
Definition: avfilter.h:781
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:472
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
enum AVCodecID codec_id
Definition: ffmpeg_vaapi.c:149
int64_t recording_time
desired length of the resulting file in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:499
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
uint8_t * name
Definition: ffmpeg.h:238
int nb_outputs
Definition: ffmpeg.h:255
AVDictionary * swr_opts
Definition: ffmpeg.h:461
#define DECODING_FOR_FILTER
Definition: ffmpeg.h:265
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2263
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:1278
AVRational frame_rate
Definition: ffmpeg.h:431
AVBufferRef * hw_frames_ctx
Definition: ffmpeg.h:342
double get_rotation(AVStream *st)
Definition: cmdutils.c:2075
int accurate_seek
Definition: ffmpeg.h:374
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
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
Main libavfilter public API header.
Memory buffer source API.
const char * desc
Definition: nvenc.c:89
AVRational framerate
Definition: ffmpeg.h:292
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:965
int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the given stream matches a stream specifier.
Definition: cmdutils.c:1971
AVFilterInOut * out_tmp
Definition: ffmpeg.h:241
enum AVMediaType avfilter_pad_get_type(const AVFilterPad *pads, int pad_idx)
Get the type of an AVFilterPad.
Definition: avfilter.c:1030
int decoding_needed
Definition: ffmpeg.h:263
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:945
int num
Numerator.
Definition: rational.h:59
static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
int index
stream index in AVFormatContext
Definition: avformat.h:879
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:2070
void avfilter_graph_free(AVFilterGraph **graph)
Free a graph, destroy its links, and set *graph to NULL.
AVBufferRef * hw_device_ctx
For filters which will create hardware frames, sets the device the filter should create them in...
Definition: avfilter.h:363
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1887
#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
int nb_input_streams
Definition: ffmpeg.c:138
static enum AVPixelFormat * get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
Definition: ffmpeg_filter.c:42
AVCodec.
Definition: avcodec.h:3573
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1266
int64_t start_time
start time in microseconds == AV_TIME_BASE units
Definition: ffmpeg.h:500
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
int index
Definition: ffmpeg.h:246
char * scale_sws_opts
sws options to use for the auto-inserted scale filters
Definition: avfilter.h:784
struct FilterGraph * graph
Definition: ffmpeg.h:230
Format I/O context.
Definition: avformat.h:1327
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:4703
#define SWS_BILINEAR
Definition: swscale.h:59
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:63
struct InputStream * ist
Definition: ffmpeg.h:229
char * name
name of this filter instance
Definition: avfilter.h:312
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static AVFilter ** last_filter
Definition: avfilter.c:514
AVFilterGraph * graph
Definition: ffmpeg.h:249
supported_samplerates
int avfilter_link(AVFilterContext *src, unsigned srcpad, AVFilterContext *dst, unsigned dstpad)
Link two filters together.
Definition: avfilter.c:133
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:318
static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
static int64_t start_time
Definition: ffplay.c:330
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2429
uint8_t
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:140
AVDictionary * sws_dict
Definition: ffmpeg.h:460
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:103
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
int shortest
Definition: ffmpeg.h:503
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1395
int64_t duration
Definition: movenc.c:63
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:785
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
AVDictionary * resample_opts
Definition: ffmpeg.h:462
AVFilterContext * filter
Definition: ffmpeg.h:235
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
int nb_input_files
Definition: ffmpeg.c:140
AVCodec * dec
Definition: ffmpeg.h:268
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:259
struct InputStream::sub2video sub2video
int resample_pix_fmt
Definition: ffmpeg.h:299
int resample_height
Definition: ffmpeg.h:297
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2881
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:314
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#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:585
FilterGraph ** filtergraphs
Definition: ffmpeg.c:147
AVFilterContext * filter
Definition: ffmpeg.h:228
#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:96
int capabilities
Codec capabilities.
Definition: avcodec.h:3592
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1754
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:539
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3580
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
int format
video: the pixel format, value corresponds to enum AVPixelFormat audio: the sample format...
Definition: buffersrc.h:79
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:82
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:1037
static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2472
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
OutputFilter * filter
Definition: ffmpeg.h:454
const AVFilter * avfilter_get_by_name(const char *name)
Get a filter definition matching the given name.
Definition: avfilter.c:519
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1383
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
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:3594
This structure contains the parameters describing the frames that will be passed to this filter...
Definition: buffersrc.h:74
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:885
external API header
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
struct OutputStream * ost
Definition: ffmpeg.h:236
int width
picture width / height.
Definition: avcodec.h:1846
char * apad
Definition: ffmpeg.h:463
AVS_Value args
Definition: avisynth_c.h:699
AVFormatContext * ctx
Definition: movenc.c:48
int nb_filtergraphs
Definition: ffmpeg.c:148
int(* hwaccel_retrieve_data)(AVCodecContext *s, AVFrame *frame)
Definition: ffmpeg.h:339
int audio_channels_mapped
Definition: ffmpeg.h:449
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define GET_SAMPLE_FMT_NAME(sample_fmt)
Definition: cmdutils.h:578
AVFilterContext * filter_ctx
filter context associated to this input/output
Definition: avfilter.h:959
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:3081
void exit_program(int ret)
Wraps exit with a program-specific cleanup routine.
Definition: cmdutils.c:126
AVCodecContext * enc
Definition: muxing.c:55
int start_at_zero
Definition: ffmpeg_opt.c:112
int avfilter_init_str(AVFilterContext *filter, const char *args)
Initialize a filter with the supplied parameters.
Definition: avfilter.c:906
int audio_volume
Definition: ffmpeg_opt.c:102
Stream structure.
Definition: avformat.h:878
A linked-list of the inputs/outputs of the filter chain.
Definition: avfilter.h:954
InputFilter ** filters
Definition: ffmpeg.h:324
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:54
#define GET_SAMPLE_RATE_NAME(rate)
Definition: cmdutils.h:581
int64_t recording_time
Definition: ffmpeg.h:369
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2441
AVBufferRef * hw_frames_ctx
Video with a hwaccel pixel format only.
Definition: buffersrc.h:107
AVStream * st
Definition: ffmpeg.h:260
sample_rate
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
#define AV_BPRINT_SIZE_AUTOMATIC
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter, AVFilterInOut *in)
enum AVMediaType codec_type
Definition: avcodec.h:1667
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
enum AVCodecID codec_id
Definition: avcodec.h:1676
int sample_rate
samples per second
Definition: avcodec.h:2421
static char * choose_pix_fmts(OutputStream *ost)
int ist_index
Definition: ffmpeg.h:358
const char * graph_desc
Definition: ffmpeg.h:247
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int64_t start_time
Definition: ffmpeg.h:367
main external API structure.
Definition: avcodec.h:1659
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:320
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:420
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg)
GLint GLenum type
Definition: opengl_enc.c:105
int * audio_channels_map
Definition: ffmpeg.h:448
static const char * format
Definition: movenc.c:47
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:118
Filter definition.
Definition: avfilter.h:144
int pad_idx
index of the filt_ctx pad to use for linking
Definition: avfilter.h:962
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int file_index
Definition: ffmpeg.h:404
AVCodecContext * dec_ctx
Definition: ffmpeg.h:267
AVMediaType
Definition: avutil.h:193
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:253
unsigned nb_filters
Definition: avfilter.h:782
int autorotate
Definition: ffmpeg.h:296
#define snprintf
Definition: snprintf.h:34
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
float audio_drift_threshold
Definition: ffmpeg_opt.c:98
char * name
unique name for this input/output in the list
Definition: avfilter.h:956
int nb_filters
Definition: ffmpeg.h:325
#define SWS_BITEXACT
Definition: swscale.h:84
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1412
#define AVERROR_FILTER_NOT_FOUND
Filter not found.
Definition: error.h:58
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int resample_width
Definition: ffmpeg.h:298
int reconfiguration
Definition: ffmpeg.h:250
struct FilterGraph * graph
Definition: ffmpeg.h:237
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:263
#define DESCRIBE_FILTER_LINK(f, inout, in)
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
Initialize the buffersrc or abuffersrc filter with the provided parameters.
Definition: buffersrc.c:93
AVStream * st
Definition: muxing.c:54
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
Definition: avcodec.h:1045
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:92
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
char * key
Definition: dict.h:86
int den
Denominator.
Definition: rational.h:60
int copy_ts
Definition: ffmpeg_opt.c:111
AVFormatContext * ctx
Definition: ffmpeg.h:355
AVBufferRef * hw_device_ctx
Definition: ffmpeg_opt.c:93
#define AVERROR_DECODER_NOT_FOUND
Decoder not found.
Definition: error.h:52
int do_deinterlace
Definition: ffmpeg_opt.c:106
#define GROW_ARRAY(array, nb_elems)
Definition: cmdutils.h:572
pixel format definitions
char * avfilter
Definition: ffmpeg.h:455
uint8_t * name
Definition: ffmpeg.h:231
char * value
Definition: dict.h:87
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:2422
OutputFilter ** outputs
Definition: ffmpeg.h:254
InputFile ** input_files
Definition: ffmpeg.c:139
AVBufferSrcParameters * av_buffersrc_parameters_alloc(void)
Allocate a new AVBufferSrcParameters instance.
Definition: buffersrc.c:82
AVFormatContext * ctx
Definition: ffmpeg.h:496
int filtergraph_is_simple(FilterGraph *fg)
An instance of a filter.
Definition: avfilter.h:307
AVDictionary * encoder_opts
Definition: ffmpeg.h:459
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
FILE * out
Definition: movenc.c:54
all automatic conversions disabled
Definition: avfilter.h:927
InputFilter ** inputs
Definition: ffmpeg.h:252
#define av_freep(p)
enum AVPixelFormat hwaccel_retrieved_pix_fmt
Definition: ffmpeg.h:341
#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
OutputFile ** output_files
Definition: ffmpeg.c:144
#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:3596
int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
int discard
Definition: ffmpeg.h:261
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2179
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:915
void choose_sample_fmt(AVStream *st, AVCodec *codec)
Definition: ffmpeg_filter.c:92
int nb_inputs
Definition: ffmpeg.h:253
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:938
int index
Definition: ffmpeg.h:405
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
enum AVMediaType type
Definition: ffmpeg.h:242
#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:431
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2877
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
#define tb
Definition: regdef.h:68
InputStream ** input_streams
Definition: ffmpeg.c:137
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
discard nothing
Definition: avcodec.h:780
const char * name
Definition: opengl_enc.c:103