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/avassert.h"
32 #include "libavutil/avstring.h"
34 #include "libavutil/opt.h"
35 #include "audio.h"
36 #include "avfilter.h"
37 #include "internal.h"
38 
39 typedef struct URITable {
40  char **uris;
41  size_t n_uris;
42 } URITable;
43 
44 typedef struct LV2Context {
45  const AVClass *class;
46  char *plugin_uri;
47  char *options;
48 
49  unsigned nb_inputs;
50  unsigned nb_inputcontrols;
51  unsigned nb_outputs;
52 
55  int64_t pts;
56  int64_t duration;
57 
58  LilvWorld *world;
59  const LilvPlugin *plugin;
60  uint32_t nb_ports;
61  float *values;
63  LV2_URID_Map map;
64  LV2_Feature map_feature;
65  LV2_URID_Unmap unmap;
66  LV2_Feature unmap_feature;
67  LV2_Atom_Sequence seq_in[2];
68  LV2_Atom_Sequence *seq_out;
69  const LV2_Feature *features[5];
70 
71  float *mins;
72  float *maxes;
73  float *controls;
74 
75  LilvInstance *instance;
76 
77  LilvNode *atom_AtomPort;
78  LilvNode *atom_Sequence;
79  LilvNode *lv2_AudioPort;
80  LilvNode *lv2_CVPort;
81  LilvNode *lv2_ControlPort;
82  LilvNode *lv2_Optional;
83  LilvNode *lv2_InputPort;
84  LilvNode *lv2_OutputPort;
85  LilvNode *urid_map;
87  LilvNode *fixedBlockLength;
88  LilvNode *boundedBlockLength;
89 } LV2Context;
90 
91 #define OFFSET(x) offsetof(LV2Context, x)
92 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
93 
94 static const AVOption lv2_options[] = {
95  { "plugin", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
96  { "p", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
97  { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
98  { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
99  { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
100  { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
101  { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
102  { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
103  { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
104  { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
105  { NULL }
106 };
107 
109 
111 {
112  table->uris = NULL;
113  table->n_uris = 0;
114 }
115 
117 {
118  int i;
119 
120  for (i = 0; i < table->n_uris; i++) {
121  av_freep(&table->uris[i]);
122  }
123 
124  av_freep(&table->uris);
125 }
126 
127 static LV2_URID uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
128 {
129  URITable *table = (URITable*)handle;
130  const size_t len = strlen(uri);
131  size_t i;
132  char **tmp;
133 
134  for (i = 0; i < table->n_uris; i++) {
135  if (!strcmp(table->uris[i], uri)) {
136  return i + 1;
137  }
138  }
139 
140  tmp = av_calloc(table->n_uris + 1, sizeof(char*));
141  if (!tmp)
142  return table->n_uris;
143  memcpy(tmp, table->uris, table->n_uris * sizeof(char**));
144 
145  av_free(table->uris);
146  table->uris = tmp;
147  table->uris[table->n_uris] = av_malloc(len + 1);
148  if (!table->uris[table->n_uris])
149  return table->n_uris;
150 
151  memcpy(table->uris[table->n_uris], uri, len + 1);
152  table->n_uris++;
153 
154  return table->n_uris;
155 }
156 
157 static const char *uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
158 {
159  URITable *table = (URITable*)handle;
160 
161  if (urid > 0 && urid <= table->n_uris) {
162  return table->uris[urid - 1];
163  }
164 
165  return NULL;
166 }
167 
169 {
170  int ich = 0, och = 0, i;
171 
172  for (i = 0; i < s->nb_ports; i++) {
173  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
174 
175  if (lilv_port_is_a(s->plugin, port, s->lv2_AudioPort) ||
176  lilv_port_is_a(s->plugin, port, s->lv2_CVPort)) {
177  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
178  lilv_instance_connect_port(s->instance, i, in->extended_data[ich++]);
179  } else if (lilv_port_is_a(s->plugin, port, s->lv2_OutputPort)) {
180  lilv_instance_connect_port(s->instance, i, out->extended_data[och++]);
181  } else {
182  av_log(s, AV_LOG_WARNING, "port %d neither input nor output, skipping\n", i);
183  }
184  } else if (lilv_port_is_a(s->plugin, port, s->atom_AtomPort)) {
185  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
186  lilv_instance_connect_port(s->instance, i, &s->seq_in);
187  } else {
188  lilv_instance_connect_port(s->instance, i, s->seq_out);
189  }
190  } else if (lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
191  lilv_instance_connect_port(s->instance, i, &s->controls[i]);
192  }
193  }
194 
195  s->seq_in[0].atom.size = sizeof(LV2_Atom_Sequence_Body);
196  s->seq_in[0].atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Sequence);
197  s->seq_out->atom.size = 9624;
198  s->seq_out->atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Chunk);
199 }
200 
202 {
203  AVFilterContext *ctx = inlink->dst;
204  LV2Context *s = ctx->priv;
205  AVFrame *out;
206 
207  if (!s->nb_outputs ||
208  (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs)) {
209  out = in;
210  } else {
211  out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
212  if (!out) {
213  av_frame_free(&in);
214  return AVERROR(ENOMEM);
215  }
217  }
218 
219  connect_ports(s, in, out);
220 
221  lilv_instance_run(s->instance, in->nb_samples);
222 
223  if (out != in)
224  av_frame_free(&in);
225 
226  return ff_filter_frame(ctx->outputs[0], out);
227 }
228 
229 static int request_frame(AVFilterLink *outlink)
230 {
231  AVFilterContext *ctx = outlink->src;
232  LV2Context *s = ctx->priv;
233  AVFrame *out;
234  int64_t t;
235 
236  if (ctx->nb_inputs)
237  return ff_request_frame(ctx->inputs[0]);
238 
239  t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
240  if (s->duration >= 0 && t >= s->duration)
241  return AVERROR_EOF;
242 
243  out = ff_get_audio_buffer(outlink, s->nb_samples);
244  if (!out)
245  return AVERROR(ENOMEM);
246 
247  connect_ports(s, out, out);
248 
249  lilv_instance_run(s->instance, out->nb_samples);
250 
251  out->sample_rate = s->sample_rate;
252  out->pts = s->pts;
253  s->pts += s->nb_samples;
254 
255  return ff_filter_frame(outlink, out);
256 }
257 
258 static const LV2_Feature buf_size_features[3] = {
259  { LV2_BUF_SIZE__powerOf2BlockLength, NULL },
260  { LV2_BUF_SIZE__fixedBlockLength, NULL },
261  { LV2_BUF_SIZE__boundedBlockLength, NULL },
262 };
263 
264 static int config_output(AVFilterLink *outlink)
265 {
266  AVFilterContext *ctx = outlink->src;
267  LV2Context *s = ctx->priv;
268  char *p, *arg, *saveptr = NULL;
269  int i, sample_rate;
270 
271  uri_table_init(&s->uri_table);
272  s->map.handle = &s->uri_table;
273  s->map.map = uri_table_map;
274  s->map_feature.URI = LV2_URID_MAP_URI;
275  s->map_feature.data = &s->map;
276  s->unmap.handle = &s->uri_table;
277  s->unmap.unmap = uri_table_unmap;
278  s->unmap_feature.URI = LV2_URID_UNMAP_URI;
279  s->unmap_feature.data = &s->unmap;
280  s->features[0] = &s->map_feature;
281  s->features[1] = &s->unmap_feature;
282  s->features[2] = &buf_size_features[0];
283  s->features[3] = &buf_size_features[1];
284  s->features[4] = &buf_size_features[2];
285 
286  if (ctx->nb_inputs) {
287  AVFilterLink *inlink = ctx->inputs[0];
288 
289  outlink->format = inlink->format;
290  outlink->sample_rate = sample_rate = inlink->sample_rate;
291  if (s->nb_inputs == s->nb_outputs) {
292  outlink->channel_layout = inlink->channel_layout;
293  outlink->channels = inlink->channels;
294  }
295 
296  } else {
297  outlink->sample_rate = sample_rate = s->sample_rate;
298  outlink->time_base = (AVRational){1, s->sample_rate};
299  }
300 
301  s->instance = lilv_plugin_instantiate(s->plugin, sample_rate, s->features);
302  if (!s->instance) {
303  av_log(s, AV_LOG_ERROR, "Failed to instantiate <%s>\n", lilv_node_as_uri(lilv_plugin_get_uri(s->plugin)));
304  return AVERROR(EINVAL);
305  }
306 
307  s->mins = av_calloc(s->nb_ports, sizeof(float));
308  s->maxes = av_calloc(s->nb_ports, sizeof(float));
309  s->controls = av_calloc(s->nb_ports, sizeof(float));
310 
311  if (!s->mins || !s->maxes || !s->controls)
312  return AVERROR(ENOMEM);
313 
314  lilv_plugin_get_port_ranges_float(s->plugin, s->mins, s->maxes, s->controls);
315  s->seq_out = av_malloc(sizeof(LV2_Atom_Sequence) + 9624);
316  if (!s->seq_out)
317  return AVERROR(ENOMEM);
318 
319  if (s->options && !strcmp(s->options, "help")) {
320  if (!s->nb_inputcontrols) {
322  "The '%s' plugin does not have any input controls.\n",
323  s->plugin_uri);
324  } else {
326  "The '%s' plugin has the following input controls:\n",
327  s->plugin_uri);
328  for (i = 0; i < s->nb_ports; i++) {
329  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
330  const LilvNode *symbol = lilv_port_get_symbol(s->plugin, port);
331  LilvNode *name = lilv_port_get_name(s->plugin, port);
332 
333  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort) &&
334  lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
335  av_log(ctx, AV_LOG_INFO, "%s\t\t<float> (from %f to %f) (default %f)\t\t%s\n",
336  lilv_node_as_string(symbol), s->mins[i], s->maxes[i], s->controls[i],
337  lilv_node_as_string(name));
338  }
339 
340  lilv_node_free(name);
341  }
342  }
343  return AVERROR_EXIT;
344  }
345 
346  p = s->options;
347  while (s->options) {
348  const LilvPort *port;
349  LilvNode *sym;
350  float val;
351  char *str, *vstr;
352  int index;
353 
354  if (!(arg = av_strtok(p, " |", &saveptr)))
355  break;
356  p = NULL;
357 
358  vstr = strstr(arg, "=");
359  if (vstr == NULL) {
360  av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
361  return AVERROR(EINVAL);
362  }
363 
364  vstr[0] = 0;
365  str = arg;
366  val = atof(vstr+1);
367  sym = lilv_new_string(s->world, str);
368  port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
369  lilv_node_free(sym);
370  if (!port) {
371  av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", str);
372  } else {
373  index = lilv_port_get_index(s->plugin, port);
374  s->controls[index] = val;
375  }
376  }
377 
378  if (s->nb_inputs &&
379  (lilv_plugin_has_feature(s->plugin, s->powerOf2BlockLength) ||
380  lilv_plugin_has_feature(s->plugin, s->fixedBlockLength) ||
381  lilv_plugin_has_feature(s->plugin, s->boundedBlockLength))) {
382  AVFilterLink *inlink = ctx->inputs[0];
383 
384  inlink->partial_buf_size = inlink->min_samples = inlink->max_samples = 4096;
385  }
386 
387  return 0;
388 }
389 
391 {
392  LV2Context *s = ctx->priv;
393  const LilvPlugins *plugins;
394  const LilvPlugin *plugin;
395  AVFilterPad pad = { NULL };
396  LilvNode *uri;
397  int i;
398 
399  s->world = lilv_world_new();
400  if (!s->world)
401  return AVERROR(ENOMEM);
402 
403  uri = lilv_new_uri(s->world, s->plugin_uri);
404  if (!uri) {
405  av_log(s, AV_LOG_ERROR, "Invalid plugin URI <%s>\n", s->plugin_uri);
406  return AVERROR(EINVAL);
407  }
408 
409  lilv_world_load_all(s->world);
410  plugins = lilv_world_get_all_plugins(s->world);
411  plugin = lilv_plugins_get_by_uri(plugins, uri);
412  lilv_node_free(uri);
413 
414  if (!plugin) {
415  av_log(s, AV_LOG_ERROR, "Plugin <%s> not found\n", s->plugin_uri);
416  return AVERROR(EINVAL);
417  }
418 
419  s->plugin = plugin;
420  s->nb_ports = lilv_plugin_get_num_ports(s->plugin);
421 
422  s->lv2_InputPort = lilv_new_uri(s->world, LV2_CORE__InputPort);
423  s->lv2_OutputPort = lilv_new_uri(s->world, LV2_CORE__OutputPort);
424  s->lv2_AudioPort = lilv_new_uri(s->world, LV2_CORE__AudioPort);
425  s->lv2_ControlPort = lilv_new_uri(s->world, LV2_CORE__ControlPort);
426  s->lv2_Optional = lilv_new_uri(s->world, LV2_CORE__connectionOptional);
427  s->atom_AtomPort = lilv_new_uri(s->world, LV2_ATOM__AtomPort);
428  s->atom_Sequence = lilv_new_uri(s->world, LV2_ATOM__Sequence);
429  s->urid_map = lilv_new_uri(s->world, LV2_URID__map);
430  s->powerOf2BlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__powerOf2BlockLength);
431  s->fixedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__fixedBlockLength);
432  s->boundedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__boundedBlockLength);
433 
434  for (i = 0; i < s->nb_ports; i++) {
435  const LilvPort *lport = lilv_plugin_get_port_by_index(s->plugin, i);
436  int is_input = 0;
437  int is_optional = 0;
438 
439  is_optional = lilv_port_has_property(s->plugin, lport, s->lv2_Optional);
440 
441  if (lilv_port_is_a(s->plugin, lport, s->lv2_InputPort)) {
442  is_input = 1;
443  } else if (!lilv_port_is_a(s->plugin, lport, s->lv2_OutputPort) && !is_optional) {
444  return AVERROR(EINVAL);
445  }
446 
447  if (lilv_port_is_a(s->plugin, lport, s->lv2_ControlPort)) {
448  if (is_input) {
449  s->nb_inputcontrols++;
450  }
451  } else if (lilv_port_is_a(s->plugin, lport, s->lv2_AudioPort)) {
452  if (is_input) {
453  s->nb_inputs++;
454  } else {
455  s->nb_outputs++;
456  }
457  }
458  }
459 
460  pad.type = AVMEDIA_TYPE_AUDIO;
461 
462  if (s->nb_inputs) {
463  pad.name = av_asprintf("in0:%s:%u", s->plugin_uri, s->nb_inputs);
464  if (!pad.name)
465  return AVERROR(ENOMEM);
466 
468  if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) {
469  av_freep(&pad.name);
470  return AVERROR(ENOMEM);
471  }
472  }
473 
474  return 0;
475 }
476 
478 {
479  LV2Context *s = ctx->priv;
482  AVFilterLink *outlink = ctx->outputs[0];
483  static const enum AVSampleFormat sample_fmts[] = {
485  int ret;
486 
488  if (!formats)
489  return AVERROR(ENOMEM);
491  if (ret < 0)
492  return ret;
493 
494  if (s->nb_inputs) {
496  if (!formats)
497  return AVERROR(ENOMEM);
498 
500  if (ret < 0)
501  return ret;
502  } else {
503  int sample_rates[] = { s->sample_rate, -1 };
504 
506  if (ret < 0)
507  return ret;
508  }
509 
510  if (s->nb_inputs == 2 && s->nb_outputs == 2) {
511  layouts = NULL;
513  if (ret < 0)
514  return ret;
516  if (ret < 0)
517  return ret;
518  } else {
519  if (s->nb_inputs >= 1) {
520  AVFilterLink *inlink = ctx->inputs[0];
521  uint64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
522 
523  layouts = NULL;
524  ret = ff_add_channel_layout(&layouts, inlayout);
525  if (ret < 0)
526  return ret;
527  ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts);
528  if (ret < 0)
529  return ret;
530 
531  if (!s->nb_outputs) {
533  if (ret < 0)
534  return ret;
535  }
536  }
537 
538  if (s->nb_outputs >= 1) {
539  uint64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
540 
541  layouts = NULL;
542  ret = ff_add_channel_layout(&layouts, outlayout);
543  if (ret < 0)
544  return ret;
546  if (ret < 0)
547  return ret;
548  }
549  }
550 
551  return 0;
552 }
553 
555 {
556  LV2Context *s = ctx->priv;
557 
558  lilv_node_free(s->powerOf2BlockLength);
559  lilv_node_free(s->fixedBlockLength);
560  lilv_node_free(s->boundedBlockLength);
561  lilv_node_free(s->urid_map);
562  lilv_node_free(s->atom_Sequence);
563  lilv_node_free(s->atom_AtomPort);
564  lilv_node_free(s->lv2_Optional);
565  lilv_node_free(s->lv2_ControlPort);
566  lilv_node_free(s->lv2_AudioPort);
567  lilv_node_free(s->lv2_OutputPort);
568  lilv_node_free(s->lv2_InputPort);
569  uri_table_destroy(&s->uri_table);
570  lilv_instance_free(s->instance);
571  lilv_world_free(s->world);
572  av_freep(&s->mins);
573  av_freep(&s->maxes);
574  av_freep(&s->controls);
575  av_freep(&s->seq_out);
576 
577  if (ctx->nb_inputs)
578  av_freep(&ctx->input_pads[0].name);
579 }
580 
581 static const AVFilterPad lv2_outputs[] = {
582  {
583  .name = "default",
584  .type = AVMEDIA_TYPE_AUDIO,
585  .config_props = config_output,
586  .request_frame = request_frame,
587  },
588  { NULL }
589 };
590 
592  .name = "lv2",
593  .description = NULL_IF_CONFIG_SMALL("Apply LV2 effect."),
594  .priv_size = sizeof(LV2Context),
595  .priv_class = &lv2_class,
596  .init = init,
597  .uninit = uninit,
599  .inputs = 0,
600  .outputs = lv2_outputs,
602 };
formats
formats
Definition: signature.h:48
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:86
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:86
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:187
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
LV2Context::lv2_OutputPort
LilvNode * lv2_OutputPort
Definition: af_lv2.c:84
LV2Context::sample_rate
int sample_rate
Definition: af_lv2.c:53
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:47
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
AVFilterFormatsConfig::channel_layouts
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:447
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:953
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:454
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
LV2Context::world
LilvWorld * world
Definition: af_lv2.c:58
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:113
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:111
lv2_outputs
static const AVFilterPad lv2_outputs[]
Definition: af_lv2.c:581
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:27
index
fg index
Definition: ffmpeg_filter.c:168
OFFSET
#define OFFSET(x)
Definition: af_lv2.c:91
AVOption
AVOption.
Definition: opt.h:248
table
static const uint16_t table[]
Definition: prosumer.c:206
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:239
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_lv2.c:390
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:395
connect_ports
static void connect_ports(LV2Context *s, AVFrame *in, AVFrame *out)
Definition: af_lv2.c:168
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
lv2_options
static const AVOption lv2_options[]
Definition: af_lv2.c:94
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
ff_insert_inpad
static int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
Definition: internal.h:240
LV2Context::lv2_ControlPort
LilvNode * lv2_ControlPort
Definition: af_lv2.c:81
ff_af_lv2
const AVFilter ff_af_lv2
Definition: af_lv2.c:591
URITable
Definition: af_lv2.c:39
LV2Context::lv2_AudioPort
LilvNode * lv2_AudioPort
Definition: af_lv2.c:79
val
static double val(void *priv, double ch)
Definition: aeval.c:76
LV2Context::fixedBlockLength
LilvNode * fixedBlockLength
Definition: af_lv2.c:87
LV2Context::nb_inputs
unsigned nb_inputs
Definition: af_lv2.c:49
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:106
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_lv2.c:477
LV2Context::duration
int64_t duration
Definition: af_lv2.c:56
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
av_cold
#define av_cold
Definition: attributes.h:90
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_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:580
duration
int64_t duration
Definition: movenc.c:64
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:331
s
#define s(width, name)
Definition: cbs_vp9.c:257
LV2Context::pts
int64_t pts
Definition: af_lv2.c:55
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
LV2Context::nb_outputs
unsigned nb_outputs
Definition: af_lv2.c:51
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:186
LV2Context::features
const LV2_Feature * features[5]
Definition: af_lv2.c:69
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
URITable::n_uris
size_t n_uris
Definition: af_lv2.c:41
ctx
AVFormatContext * ctx
Definition: movenc.c:48
FLAGS
#define FLAGS
Definition: af_lv2.c:92
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_lv2.c:554
LV2Context::lv2_Optional
LilvNode * lv2_Optional
Definition: af_lv2.c:82
arg
const char * arg
Definition: jacosubdec.c:67
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
LV2Context::boundedBlockLength
LilvNode * boundedBlockLength
Definition: af_lv2.c:88
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:536
LV2Context::lv2_InputPort
LilvNode * lv2_InputPort
Definition: af_lv2.c:83
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
LV2Context::map
LV2_URID_Map map
Definition: af_lv2.c:63
AVFilterPad::filter_frame
int(* filter_frame)(AVFilterLink *link, AVFrame *frame)
Filtering callback.
Definition: internal.h:93
uri_table_init
static void uri_table_init(URITable *table)
Definition: af_lv2.c:110
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_lv2.c:201
uri_table_destroy
static void uri_table_destroy(URITable *table)
Definition: af_lv2.c:116
LV2Context::seq_out
LV2_Atom_Sequence * seq_out
Definition: af_lv2.c:68
LV2Context::nb_inputcontrols
unsigned nb_inputcontrols
Definition: af_lv2.c:50
options
const OptionDef options[]
LV2Context::lv2_CVPort
LilvNode * lv2_CVPort
Definition: af_lv2.c:80
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:117
LV2Context::uri_table
URITable uri_table
Definition: af_lv2.c:62
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
uri_table_map
static LV2_URID uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
Definition: af_lv2.c:127
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:472
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: af_lv2.c:229
LV2Context::map_feature
LV2_Feature map_feature
Definition: af_lv2.c:64
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:192
sample_rates
sample_rates
Definition: ffmpeg_filter.c:156
internal.h
URITable::uris
char ** uris
Definition: af_lv2.c:40
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:369
LV2Context::nb_ports
uint32_t nb_ports
Definition: af_lv2.c:60
i
int i
Definition: input.c:407
LV2Context
Definition: af_lv2.c:44
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:350
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
LV2Context::atom_AtomPort
LilvNode * atom_AtomPort
Definition: af_lv2.c:77
len
int len
Definition: vorbis_enc_data.h:452
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(lv2)
LV2Context::powerOf2BlockLength
LilvNode * powerOf2BlockLength
Definition: af_lv2.c:86
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
LV2Context::values
float * values
Definition: af_lv2.c:61
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
FF_COUNT2LAYOUT
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:103
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_lv2.c:264
buf_size_features
static const LV2_Feature buf_size_features[3]
Definition: af_lv2.c:258
LV2Context::urid_map
LilvNode * urid_map
Definition: af_lv2.c:85
LV2Context::plugin_uri
char * plugin_uri
Definition: af_lv2.c:46
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:414
uri_table_unmap
static const char * uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
Definition: af_lv2.c:157
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:251
channel_layout.h
LV2Context::atom_Sequence
LilvNode * atom_Sequence
Definition: af_lv2.c:78
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
LV2Context::nb_samples
int nb_samples
Definition: af_lv2.c:54
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
audio.h
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
LV2Context::mins
float * mins
Definition: af_lv2.c:71
LV2Context::controls
float * controls
Definition: af_lv2.c:73
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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:75
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
LV2Context::seq_in
LV2_Atom_Sequence seq_in[2]
Definition: af_lv2.c:67
ff_set_common_samplerates
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:568
AVERROR_EXIT
#define AVERROR_EXIT
Immediate exit was requested; the called function should not be restarted.
Definition: error.h:56
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
LV2Context::maxes
float * maxes
Definition: af_lv2.c:72
LV2Context::unmap
LV2_URID_Unmap unmap
Definition: af_lv2.c:65
LV2Context::plugin
const LilvPlugin * plugin
Definition: af_lv2.c:59
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates.
Definition: formats.c:561
LV2Context::unmap_feature
LV2_Feature unmap_feature
Definition: af_lv2.c:66