FFmpeg
af_lv2.c
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1 /*
2  * Copyright (c) 2017 Paul B Mahol
3  * Copyright (c) 2007-2016 David Robillard <http://drobilla.net>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * LV2 wrapper
25  */
26 
27 #include <lilv/lilv.h>
28 #include <lv2/lv2plug.in/ns/ext/atom/atom.h>
29 #include <lv2/lv2plug.in/ns/ext/buf-size/buf-size.h>
30 
31 #include "libavutil/avstring.h"
33 #include "libavutil/opt.h"
34 #include "audio.h"
35 #include "avfilter.h"
36 #include "internal.h"
37 
38 typedef struct URITable {
39  char **uris;
40  size_t n_uris;
41 } URITable;
42 
43 typedef struct LV2Context {
44  const AVClass *class;
45  char *plugin_uri;
46  char *options;
47 
48  unsigned nb_inputs;
49  unsigned nb_inputcontrols;
50  unsigned nb_outputs;
51 
54  int64_t pts;
55  int64_t duration;
56 
57  LilvWorld *world;
58  const LilvPlugin *plugin;
59  uint32_t nb_ports;
60  float *values;
62  LV2_URID_Map map;
63  LV2_Feature map_feature;
64  LV2_URID_Unmap unmap;
65  LV2_Feature unmap_feature;
66  LV2_Atom_Sequence seq_in[2];
67  LV2_Atom_Sequence *seq_out;
68  const LV2_Feature *features[5];
69 
70  float *mins;
71  float *maxes;
72  float *controls;
73 
74  LilvInstance *instance;
75 
76  LilvNode *atom_AtomPort;
77  LilvNode *atom_Sequence;
78  LilvNode *lv2_AudioPort;
79  LilvNode *lv2_CVPort;
80  LilvNode *lv2_ControlPort;
81  LilvNode *lv2_Optional;
82  LilvNode *lv2_InputPort;
83  LilvNode *lv2_OutputPort;
84  LilvNode *urid_map;
86  LilvNode *fixedBlockLength;
87  LilvNode *boundedBlockLength;
88 } LV2Context;
89 
90 #define OFFSET(x) offsetof(LV2Context, x)
91 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
92 
93 static const AVOption lv2_options[] = {
94  { "plugin", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
95  { "p", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
96  { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
97  { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
98  { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
99  { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
100  { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
101  { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
102  { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
103  { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
104  { NULL }
105 };
106 
108 
110 {
111  table->uris = NULL;
112  table->n_uris = 0;
113 }
114 
116 {
117  int i;
118 
119  for (i = 0; i < table->n_uris; i++) {
120  av_freep(&table->uris[i]);
121  }
122 
123  av_freep(&table->uris);
124 }
125 
126 static LV2_URID uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
127 {
128  URITable *table = (URITable*)handle;
129  const size_t len = strlen(uri);
130  size_t i;
131  char **tmp;
132 
133  for (i = 0; i < table->n_uris; i++) {
134  if (!strcmp(table->uris[i], uri)) {
135  return i + 1;
136  }
137  }
138 
139  tmp = av_calloc(table->n_uris + 1, sizeof(char*));
140  if (!tmp)
141  return table->n_uris;
142  memcpy(tmp, table->uris, table->n_uris * sizeof(char**));
143 
144  av_free(table->uris);
145  table->uris = tmp;
146  table->uris[table->n_uris] = av_malloc(len + 1);
147  if (!table->uris[table->n_uris])
148  return table->n_uris;
149 
150  memcpy(table->uris[table->n_uris], uri, len + 1);
151  table->n_uris++;
152 
153  return table->n_uris;
154 }
155 
156 static const char *uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
157 {
158  URITable *table = (URITable*)handle;
159 
160  if (urid > 0 && urid <= table->n_uris) {
161  return table->uris[urid - 1];
162  }
163 
164  return NULL;
165 }
166 
168 {
169  int ich = 0, och = 0, i;
170 
171  for (i = 0; i < s->nb_ports; i++) {
172  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
173 
174  if (lilv_port_is_a(s->plugin, port, s->lv2_AudioPort) ||
175  lilv_port_is_a(s->plugin, port, s->lv2_CVPort)) {
176  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
177  lilv_instance_connect_port(s->instance, i, in->extended_data[ich++]);
178  } else if (lilv_port_is_a(s->plugin, port, s->lv2_OutputPort)) {
179  lilv_instance_connect_port(s->instance, i, out->extended_data[och++]);
180  } else {
181  av_log(s, AV_LOG_WARNING, "port %d neither input nor output, skipping\n", i);
182  }
183  } else if (lilv_port_is_a(s->plugin, port, s->atom_AtomPort)) {
184  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
185  lilv_instance_connect_port(s->instance, i, &s->seq_in);
186  } else {
187  lilv_instance_connect_port(s->instance, i, s->seq_out);
188  }
189  } else if (lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
190  lilv_instance_connect_port(s->instance, i, &s->controls[i]);
191  }
192  }
193 
194  s->seq_in[0].atom.size = sizeof(LV2_Atom_Sequence_Body);
195  s->seq_in[0].atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Sequence);
196  s->seq_out->atom.size = 9624;
197  s->seq_out->atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Chunk);
198 }
199 
201 {
202  AVFilterContext *ctx = inlink->dst;
203  LV2Context *s = ctx->priv;
204  AVFrame *out;
205 
206  if (!s->nb_outputs ||
207  (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs)) {
208  out = in;
209  } else {
210  out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
211  if (!out) {
212  av_frame_free(&in);
213  return AVERROR(ENOMEM);
214  }
216  }
217 
218  connect_ports(s, in, out);
219 
220  lilv_instance_run(s->instance, in->nb_samples);
221 
222  if (out != in)
223  av_frame_free(&in);
224 
225  return ff_filter_frame(ctx->outputs[0], out);
226 }
227 
228 static int request_frame(AVFilterLink *outlink)
229 {
230  AVFilterContext *ctx = outlink->src;
231  LV2Context *s = ctx->priv;
232  AVFrame *out;
233  int64_t t;
234 
235  if (ctx->nb_inputs)
236  return ff_request_frame(ctx->inputs[0]);
237 
238  t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
239  if (s->duration >= 0 && t >= s->duration)
240  return AVERROR_EOF;
241 
242  out = ff_get_audio_buffer(outlink, s->nb_samples);
243  if (!out)
244  return AVERROR(ENOMEM);
245 
246  connect_ports(s, out, out);
247 
248  lilv_instance_run(s->instance, out->nb_samples);
249 
250  out->sample_rate = s->sample_rate;
251  out->pts = s->pts;
252  s->pts += s->nb_samples;
253 
254  return ff_filter_frame(outlink, out);
255 }
256 
257 static const LV2_Feature buf_size_features[3] = {
258  { LV2_BUF_SIZE__powerOf2BlockLength, NULL },
259  { LV2_BUF_SIZE__fixedBlockLength, NULL },
260  { LV2_BUF_SIZE__boundedBlockLength, NULL },
261 };
262 
263 static int config_output(AVFilterLink *outlink)
264 {
265  AVFilterContext *ctx = outlink->src;
266  LV2Context *s = ctx->priv;
267  char *p, *arg, *saveptr = NULL;
268  int i, sample_rate;
269 
270  uri_table_init(&s->uri_table);
271  s->map.handle = &s->uri_table;
272  s->map.map = uri_table_map;
273  s->map_feature.URI = LV2_URID_MAP_URI;
274  s->map_feature.data = &s->map;
275  s->unmap.handle = &s->uri_table;
276  s->unmap.unmap = uri_table_unmap;
277  s->unmap_feature.URI = LV2_URID_UNMAP_URI;
278  s->unmap_feature.data = &s->unmap;
279  s->features[0] = &s->map_feature;
280  s->features[1] = &s->unmap_feature;
281  s->features[2] = &buf_size_features[0];
282  s->features[3] = &buf_size_features[1];
283  s->features[4] = &buf_size_features[2];
284 
285  if (ctx->nb_inputs) {
286  AVFilterLink *inlink = ctx->inputs[0];
287 
288  outlink->format = inlink->format;
289  outlink->sample_rate = sample_rate = inlink->sample_rate;
290  if (s->nb_inputs == s->nb_outputs) {
291  int ret;
292  if ((ret = av_channel_layout_copy(&outlink->ch_layout, &inlink->ch_layout)) < 0)
293  return ret;
294 #if FF_API_OLD_CHANNEL_LAYOUT
296  outlink->channel_layout = inlink->channel_layout;
298 #endif
299  }
300 
301  } else {
302  outlink->sample_rate = sample_rate = s->sample_rate;
303  outlink->time_base = (AVRational){1, s->sample_rate};
304  }
305 
306  s->instance = lilv_plugin_instantiate(s->plugin, sample_rate, s->features);
307  if (!s->instance) {
308  av_log(s, AV_LOG_ERROR, "Failed to instantiate <%s>\n", lilv_node_as_uri(lilv_plugin_get_uri(s->plugin)));
309  return AVERROR(EINVAL);
310  }
311 
312  s->mins = av_calloc(s->nb_ports, sizeof(float));
313  s->maxes = av_calloc(s->nb_ports, sizeof(float));
314  s->controls = av_calloc(s->nb_ports, sizeof(float));
315 
316  if (!s->mins || !s->maxes || !s->controls)
317  return AVERROR(ENOMEM);
318 
319  lilv_plugin_get_port_ranges_float(s->plugin, s->mins, s->maxes, s->controls);
320  s->seq_out = av_malloc(sizeof(LV2_Atom_Sequence) + 9624);
321  if (!s->seq_out)
322  return AVERROR(ENOMEM);
323 
324  if (s->options && !strcmp(s->options, "help")) {
325  if (!s->nb_inputcontrols) {
327  "The '%s' plugin does not have any input controls.\n",
328  s->plugin_uri);
329  } else {
331  "The '%s' plugin has the following input controls:\n",
332  s->plugin_uri);
333  for (i = 0; i < s->nb_ports; i++) {
334  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
335  const LilvNode *symbol = lilv_port_get_symbol(s->plugin, port);
336  LilvNode *name = lilv_port_get_name(s->plugin, port);
337 
338  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort) &&
339  lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
340  av_log(ctx, AV_LOG_INFO, "%s\t\t<float> (from %f to %f) (default %f)\t\t%s\n",
341  lilv_node_as_string(symbol), s->mins[i], s->maxes[i], s->controls[i],
342  lilv_node_as_string(name));
343  }
344 
345  lilv_node_free(name);
346  }
347  }
348  return AVERROR_EXIT;
349  }
350 
351  p = s->options;
352  while (s->options) {
353  const LilvPort *port;
354  LilvNode *sym;
355  float val;
356  char *str, *vstr;
357  int index;
358 
359  if (!(arg = av_strtok(p, " |", &saveptr)))
360  break;
361  p = NULL;
362 
363  vstr = strstr(arg, "=");
364  if (vstr == NULL) {
365  av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
366  return AVERROR(EINVAL);
367  }
368 
369  vstr[0] = 0;
370  str = arg;
371  val = atof(vstr+1);
372  sym = lilv_new_string(s->world, str);
373  port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
374  lilv_node_free(sym);
375  if (!port) {
376  av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", str);
377  } else {
378  index = lilv_port_get_index(s->plugin, port);
379  s->controls[index] = val;
380  }
381  }
382 
383  if (s->nb_inputs &&
384  (lilv_plugin_has_feature(s->plugin, s->powerOf2BlockLength) ||
385  lilv_plugin_has_feature(s->plugin, s->fixedBlockLength) ||
386  lilv_plugin_has_feature(s->plugin, s->boundedBlockLength))) {
387  AVFilterLink *inlink = ctx->inputs[0];
388 
389  inlink->min_samples = inlink->max_samples = 4096;
390  }
391 
392  return 0;
393 }
394 
396 {
397  LV2Context *s = ctx->priv;
398  const LilvPlugins *plugins;
399  const LilvPlugin *plugin;
400  AVFilterPad pad = { NULL };
401  LilvNode *uri;
402  int i, ret;
403 
404  s->world = lilv_world_new();
405  if (!s->world)
406  return AVERROR(ENOMEM);
407 
408  uri = lilv_new_uri(s->world, s->plugin_uri);
409  if (!uri) {
410  av_log(s, AV_LOG_ERROR, "Invalid plugin URI <%s>\n", s->plugin_uri);
411  return AVERROR(EINVAL);
412  }
413 
414  lilv_world_load_all(s->world);
415  plugins = lilv_world_get_all_plugins(s->world);
416  plugin = lilv_plugins_get_by_uri(plugins, uri);
417  lilv_node_free(uri);
418 
419  if (!plugin) {
420  av_log(s, AV_LOG_ERROR, "Plugin <%s> not found\n", s->plugin_uri);
421  return AVERROR(EINVAL);
422  }
423 
424  s->plugin = plugin;
425  s->nb_ports = lilv_plugin_get_num_ports(s->plugin);
426 
427  s->lv2_InputPort = lilv_new_uri(s->world, LV2_CORE__InputPort);
428  s->lv2_OutputPort = lilv_new_uri(s->world, LV2_CORE__OutputPort);
429  s->lv2_AudioPort = lilv_new_uri(s->world, LV2_CORE__AudioPort);
430  s->lv2_ControlPort = lilv_new_uri(s->world, LV2_CORE__ControlPort);
431  s->lv2_Optional = lilv_new_uri(s->world, LV2_CORE__connectionOptional);
432  s->atom_AtomPort = lilv_new_uri(s->world, LV2_ATOM__AtomPort);
433  s->atom_Sequence = lilv_new_uri(s->world, LV2_ATOM__Sequence);
434  s->urid_map = lilv_new_uri(s->world, LV2_URID__map);
435  s->powerOf2BlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__powerOf2BlockLength);
436  s->fixedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__fixedBlockLength);
437  s->boundedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__boundedBlockLength);
438 
439  for (i = 0; i < s->nb_ports; i++) {
440  const LilvPort *lport = lilv_plugin_get_port_by_index(s->plugin, i);
441  int is_input = 0;
442  int is_optional = 0;
443 
444  is_optional = lilv_port_has_property(s->plugin, lport, s->lv2_Optional);
445 
446  if (lilv_port_is_a(s->plugin, lport, s->lv2_InputPort)) {
447  is_input = 1;
448  } else if (!lilv_port_is_a(s->plugin, lport, s->lv2_OutputPort) && !is_optional) {
449  return AVERROR(EINVAL);
450  }
451 
452  if (lilv_port_is_a(s->plugin, lport, s->lv2_ControlPort)) {
453  if (is_input) {
454  s->nb_inputcontrols++;
455  }
456  } else if (lilv_port_is_a(s->plugin, lport, s->lv2_AudioPort)) {
457  if (is_input) {
458  s->nb_inputs++;
459  } else {
460  s->nb_outputs++;
461  }
462  }
463  }
464 
465  pad.type = AVMEDIA_TYPE_AUDIO;
466 
467  if (s->nb_inputs) {
468  pad.name = av_asprintf("in0:%s:%u", s->plugin_uri, s->nb_inputs);
469  if (!pad.name)
470  return AVERROR(ENOMEM);
471 
473  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
474  return ret;
475  }
476 
477  return 0;
478 }
479 
481 {
482  LV2Context *s = ctx->priv;
484  AVFilterLink *outlink = ctx->outputs[0];
485  static const enum AVSampleFormat sample_fmts[] = {
488  if (ret < 0)
489  return ret;
490 
491  if (s->nb_inputs) {
493  if (ret < 0)
494  return ret;
495  } else {
496  int sample_rates[] = { s->sample_rate, -1 };
497 
499  if (ret < 0)
500  return ret;
501  }
502 
503  if (s->nb_inputs == 2 && s->nb_outputs == 2) {
504  layouts = NULL;
506  if (ret < 0)
507  return ret;
509  if (ret < 0)
510  return ret;
511  } else {
512  if (s->nb_inputs >= 1) {
513  AVFilterLink *inlink = ctx->inputs[0];
514  AVChannelLayout inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
515 
516  layouts = NULL;
517  ret = ff_add_channel_layout(&layouts, &inlayout);
518  if (ret < 0)
519  return ret;
520  ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts);
521  if (ret < 0)
522  return ret;
523 
524  if (!s->nb_outputs) {
526  if (ret < 0)
527  return ret;
528  }
529  }
530 
531  if (s->nb_outputs >= 1) {
532  AVChannelLayout outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
533 
534  layouts = NULL;
535  ret = ff_add_channel_layout(&layouts, &outlayout);
536  if (ret < 0)
537  return ret;
539  if (ret < 0)
540  return ret;
541  }
542  }
543 
544  return 0;
545 }
546 
547 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
548  char *res, int res_len, int flags)
549 {
550  LV2Context *s = ctx->priv;
551  const LilvPort *port;
552  LilvNode *sym;
553  int index;
554 
555  sym = lilv_new_string(s->world, cmd);
556  port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
557  lilv_node_free(sym);
558  if (!port) {
559  av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", cmd);
560  } else {
561  index = lilv_port_get_index(s->plugin, port);
562  s->controls[index] = atof(args);
563  }
564  return 0;
565 }
566 
568 {
569  LV2Context *s = ctx->priv;
570 
571  lilv_node_free(s->powerOf2BlockLength);
572  lilv_node_free(s->fixedBlockLength);
573  lilv_node_free(s->boundedBlockLength);
574  lilv_node_free(s->urid_map);
575  lilv_node_free(s->atom_Sequence);
576  lilv_node_free(s->atom_AtomPort);
577  lilv_node_free(s->lv2_Optional);
578  lilv_node_free(s->lv2_ControlPort);
579  lilv_node_free(s->lv2_AudioPort);
580  lilv_node_free(s->lv2_OutputPort);
581  lilv_node_free(s->lv2_InputPort);
582  uri_table_destroy(&s->uri_table);
583  lilv_instance_free(s->instance);
584  lilv_world_free(s->world);
585  av_freep(&s->mins);
586  av_freep(&s->maxes);
587  av_freep(&s->controls);
588  av_freep(&s->seq_out);
589 }
590 
591 static const AVFilterPad lv2_outputs[] = {
592  {
593  .name = "default",
594  .type = AVMEDIA_TYPE_AUDIO,
595  .config_props = config_output,
596  .request_frame = request_frame,
597  },
598 };
599 
601  .name = "lv2",
602  .description = NULL_IF_CONFIG_SMALL("Apply LV2 effect."),
603  .priv_size = sizeof(LV2Context),
604  .priv_class = &lv2_class,
605  .init = init,
606  .uninit = uninit,
608  .inputs = 0,
612 };
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:100
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:82
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_lv2.c:547
LV2Context::lv2_OutputPort
LilvNode * lv2_OutputPort
Definition: af_lv2.c:83
LV2Context::sample_rate
int sample_rate
Definition: af_lv2.c:52
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
LV2Context::options
char * options
Definition: af_lv2.c:46
AVFilterFormatsConfig::channel_layouts
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:529
out
FILE * out
Definition: movenc.c:54
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:369
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1009
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:947
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:591
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:326
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
LV2Context::world
LilvWorld * world
Definition: af_lv2.c:57
ff_set_common_samplerates_from_list
int ff_set_common_samplerates_from_list(AVFilterContext *ctx, const int *samplerates)
Equivalent to ff_set_common_samplerates(ctx, ff_make_format_list(samplerates))
Definition: formats.c:733
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:116
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:116
lv2_outputs
static const AVFilterPad lv2_outputs[]
Definition: af_lv2.c:591
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
OFFSET
#define OFFSET(x)
Definition: af_lv2.c:90
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
table
static const uint16_t table[]
Definition: prosumer.c:205
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:239
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_lv2.c:395
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:410
ff_set_common_all_samplerates
int ff_set_common_all_samplerates(AVFilterContext *ctx)
Equivalent to ff_set_common_samplerates(ctx, ff_all_samplerates())
Definition: formats.c:739
connect_ports
static void connect_ports(LV2Context *s, AVFrame *in, AVFrame *out)
Definition: af_lv2.c:167
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
lv2_options
static const AVOption lv2_options[]
Definition: af_lv2.c:93
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
LV2Context::lv2_ControlPort
LilvNode * lv2_ControlPort
Definition: af_lv2.c:80
ff_af_lv2
const AVFilter ff_af_lv2
Definition: af_lv2.c:600
URITable
Definition: af_lv2.c:38
LV2Context::lv2_AudioPort
LilvNode * lv2_AudioPort
Definition: af_lv2.c:78
val
static double val(void *priv, double ch)
Definition: aeval.c:77
LV2Context::fixedBlockLength
LilvNode * fixedBlockLength
Definition: af_lv2.c:86
LV2Context::nb_inputs
unsigned nb_inputs
Definition: af_lv2.c:48
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:116
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_lv2.c:480
LV2Context::duration
int64_t duration
Definition: af_lv2.c:55
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
duration
int64_t duration
Definition: movenc.c:64
s
#define s(width, name)
Definition: cbs_vp9.c:256
LV2Context::pts
int64_t pts
Definition: af_lv2.c:54
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
LV2Context::nb_outputs
unsigned nb_outputs
Definition: af_lv2.c:50
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:189
ff_set_common_formats_from_list
int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts)
Equivalent to ff_set_common_formats(ctx, ff_make_format_list(fmts))
Definition: formats.c:755
LV2Context::features
const LV2_Feature * features[5]
Definition: af_lv2.c:68
URITable::n_uris
size_t n_uris
Definition: af_lv2.c:40
ctx
AVFormatContext * ctx
Definition: movenc.c:48
FLAGS
#define FLAGS
Definition: af_lv2.c:91
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_lv2.c:567
LV2Context::lv2_Optional
LilvNode * lv2_Optional
Definition: af_lv2.c:81
arg
const char * arg
Definition: jacosubdec.c:67
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
LV2Context::boundedBlockLength
LilvNode * boundedBlockLength
Definition: af_lv2.c:87
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:603
LV2Context::lv2_InputPort
LilvNode * lv2_InputPort
Definition: af_lv2.c:82
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:131
LV2Context::map
LV2_URID_Map map
Definition: af_lv2.c:62
AVFilterPad::filter_frame
int(* filter_frame)(AVFilterLink *link, AVFrame *frame)
Filtering callback.
Definition: internal.h:104
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:466
uri_table_init
static void uri_table_init(URITable *table)
Definition: af_lv2.c:109
index
int index
Definition: gxfenc.c:89
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_lv2.c:200
uri_table_destroy
static void uri_table_destroy(URITable *table)
Definition: af_lv2.c:115
LV2Context::seq_out
LV2_Atom_Sequence * seq_out
Definition: af_lv2.c:67
LV2Context::nb_inputcontrols
unsigned nb_inputcontrols
Definition: af_lv2.c:49
options
const OptionDef options[]
LV2Context::lv2_CVPort
LilvNode * lv2_CVPort
Definition: af_lv2.c:79
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
LV2Context::uri_table
URITable uri_table
Definition: af_lv2.c:61
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:301
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
uri_table_map
static LV2_URID uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
Definition: af_lv2.c:126
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:533
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: af_lv2.c:228
LV2Context::map_feature
LV2_Feature map_feature
Definition: af_lv2.c:63
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
sample_rates
sample_rates
Definition: ffmpeg_filter.c:156
internal.h
URITable::uris
char ** uris
Definition: af_lv2.c:39
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:405
LV2Context::nb_ports
uint32_t nb_ports
Definition: af_lv2.c:59
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
LV2Context
Definition: af_lv2.c:43
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:386
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
LV2Context::atom_AtomPort
LilvNode * atom_AtomPort
Definition: af_lv2.c:76
len
int len
Definition: vorbis_enc_data.h:426
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(lv2)
LV2Context::powerOf2BlockLength
LilvNode * powerOf2BlockLength
Definition: af_lv2.c:85
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
LV2Context::values
float * values
Definition: af_lv2.c:60
AVFilter
Filter definition.
Definition: avfilter.h:171
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
FF_COUNT2LAYOUT
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_lv2.c:263
buf_size_features
static const LV2_Feature buf_size_features[3]
Definition: af_lv2.c:257
LV2Context::urid_map
LilvNode * urid_map
Definition: af_lv2.c:84
LV2Context::plugin_uri
char * plugin_uri
Definition: af_lv2.c:45
uri_table_unmap
static const char * uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
Definition: af_lv2.c:156
channel_layout.h
LV2Context::atom_Sequence
LilvNode * atom_Sequence
Definition: af_lv2.c:77
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
LV2Context::nb_samples
int nb_samples
Definition: af_lv2.c:53
AVFilterContext
An instance of a filter.
Definition: avfilter.h:415
av_channel_layout_copy
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
Definition: channel_layout.c:639
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
audio.h
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
LV2Context::mins
float * mins
Definition: af_lv2.c:70
LV2Context::controls
float * controls
Definition: af_lv2.c:72
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
convert_header.str
string str
Definition: convert_header.py:20
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
LV2Context::instance
LilvInstance * instance
Definition: af_lv2.c:74
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
LV2Context::seq_in
LV2_Atom_Sequence seq_in[2]
Definition: af_lv2.c:66
AVERROR_EXIT
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:58
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
LV2Context::maxes
float * maxes
Definition: af_lv2.c:71
LV2Context::unmap
LV2_URID_Unmap unmap
Definition: af_lv2.c:64
LV2Context::plugin
const LilvPlugin * plugin
Definition: af_lv2.c:58
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
Helpers for query_formats() which set all free audio links to the same list of channel layouts/sample...
Definition: formats.c:708
LV2Context::unmap_feature
LV2_Feature unmap_feature
Definition: af_lv2.c:65