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/mem.h"
34 #include "libavutil/opt.h"
35 #include "audio.h"
36 #include "avfilter.h"
37 #include "formats.h"
38 #include "internal.h"
39 
40 typedef struct URITable {
41  char **uris;
42  size_t n_uris;
43 } URITable;
44 
45 typedef struct LV2Context {
46  const AVClass *class;
47  char *plugin_uri;
48  char *options;
49 
50  unsigned nb_inputs;
51  unsigned nb_inputcontrols;
52  unsigned nb_outputs;
53 
56  int64_t pts;
57  int64_t duration;
58 
59  LilvWorld *world;
60  const LilvPlugin *plugin;
61  uint32_t nb_ports;
62  float *values;
64  LV2_URID_Map map;
65  LV2_Feature map_feature;
66  LV2_URID_Unmap unmap;
67  LV2_Feature unmap_feature;
68  LV2_Atom_Sequence seq_in[2];
69  LV2_Atom_Sequence *seq_out;
70  const LV2_Feature *features[5];
71 
72  float *mins;
73  float *maxes;
74  float *controls;
75 
76  LilvInstance *instance;
77 
78  LilvNode *atom_AtomPort;
79  LilvNode *atom_Sequence;
80  LilvNode *lv2_AudioPort;
81  LilvNode *lv2_CVPort;
82  LilvNode *lv2_ControlPort;
83  LilvNode *lv2_Optional;
84  LilvNode *lv2_InputPort;
85  LilvNode *lv2_OutputPort;
86  LilvNode *urid_map;
88  LilvNode *fixedBlockLength;
89  LilvNode *boundedBlockLength;
90 } LV2Context;
91 
92 #define OFFSET(x) offsetof(LV2Context, x)
93 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
94 
95 static const AVOption lv2_options[] = {
96  { "plugin", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
97  { "p", "set plugin uri", OFFSET(plugin_uri), AV_OPT_TYPE_STRING, .flags = FLAGS },
98  { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
99  { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
100  { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
101  { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
102  { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
103  { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
104  { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
105  { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
106  { NULL }
107 };
108 
110 
112 {
113  table->uris = NULL;
114  table->n_uris = 0;
115 }
116 
118 {
119  int i;
120 
121  for (i = 0; i < table->n_uris; i++) {
122  av_freep(&table->uris[i]);
123  }
124 
125  av_freep(&table->uris);
126 }
127 
128 static LV2_URID uri_table_map(LV2_URID_Map_Handle handle, const char *uri)
129 {
130  URITable *table = (URITable*)handle;
131  const size_t len = strlen(uri);
132  size_t i;
133  char **tmp;
134 
135  for (i = 0; i < table->n_uris; i++) {
136  if (!strcmp(table->uris[i], uri)) {
137  return i + 1;
138  }
139  }
140 
141  tmp = av_calloc(table->n_uris + 1, sizeof(char*));
142  if (!tmp)
143  return table->n_uris;
144  memcpy(tmp, table->uris, table->n_uris * sizeof(char**));
145 
146  av_free(table->uris);
147  table->uris = tmp;
148  table->uris[table->n_uris] = av_malloc(len + 1);
149  if (!table->uris[table->n_uris])
150  return table->n_uris;
151 
152  memcpy(table->uris[table->n_uris], uri, len + 1);
153  table->n_uris++;
154 
155  return table->n_uris;
156 }
157 
158 static const char *uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
159 {
160  URITable *table = (URITable*)handle;
161 
162  if (urid > 0 && urid <= table->n_uris) {
163  return table->uris[urid - 1];
164  }
165 
166  return NULL;
167 }
168 
170 {
171  int ich = 0, och = 0, i;
172 
173  for (i = 0; i < s->nb_ports; i++) {
174  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
175 
176  if (lilv_port_is_a(s->plugin, port, s->lv2_AudioPort) ||
177  lilv_port_is_a(s->plugin, port, s->lv2_CVPort)) {
178  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
179  lilv_instance_connect_port(s->instance, i, in->extended_data[ich++]);
180  } else if (lilv_port_is_a(s->plugin, port, s->lv2_OutputPort)) {
181  lilv_instance_connect_port(s->instance, i, out->extended_data[och++]);
182  } else {
183  av_log(s, AV_LOG_WARNING, "port %d neither input nor output, skipping\n", i);
184  }
185  } else if (lilv_port_is_a(s->plugin, port, s->atom_AtomPort)) {
186  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort)) {
187  lilv_instance_connect_port(s->instance, i, &s->seq_in);
188  } else {
189  lilv_instance_connect_port(s->instance, i, s->seq_out);
190  }
191  } else if (lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
192  lilv_instance_connect_port(s->instance, i, &s->controls[i]);
193  }
194  }
195 
196  s->seq_in[0].atom.size = sizeof(LV2_Atom_Sequence_Body);
197  s->seq_in[0].atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Sequence);
198  s->seq_out->atom.size = 9624;
199  s->seq_out->atom.type = uri_table_map(&s->uri_table, LV2_ATOM__Chunk);
200 }
201 
203 {
204  AVFilterContext *ctx = inlink->dst;
205  LV2Context *s = ctx->priv;
206  AVFrame *out;
207 
208  if (!s->nb_outputs ||
209  (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs)) {
210  out = in;
211  } else {
212  out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
213  if (!out) {
214  av_frame_free(&in);
215  return AVERROR(ENOMEM);
216  }
218  }
219 
220  connect_ports(s, in, out);
221 
222  lilv_instance_run(s->instance, in->nb_samples);
223 
224  if (out != in)
225  av_frame_free(&in);
226 
227  return ff_filter_frame(ctx->outputs[0], out);
228 }
229 
230 static int request_frame(AVFilterLink *outlink)
231 {
232  AVFilterContext *ctx = outlink->src;
233  LV2Context *s = ctx->priv;
234  AVFrame *out;
235  int64_t t;
236 
237  if (ctx->nb_inputs)
238  return ff_request_frame(ctx->inputs[0]);
239 
240  t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
241  if (s->duration >= 0 && t >= s->duration)
242  return AVERROR_EOF;
243 
244  out = ff_get_audio_buffer(outlink, s->nb_samples);
245  if (!out)
246  return AVERROR(ENOMEM);
247 
248  connect_ports(s, out, out);
249 
250  lilv_instance_run(s->instance, out->nb_samples);
251 
252  out->sample_rate = s->sample_rate;
253  out->pts = s->pts;
254  s->pts += s->nb_samples;
255 
256  return ff_filter_frame(outlink, out);
257 }
258 
259 static const LV2_Feature buf_size_features[3] = {
260  { LV2_BUF_SIZE__powerOf2BlockLength, NULL },
261  { LV2_BUF_SIZE__fixedBlockLength, NULL },
262  { LV2_BUF_SIZE__boundedBlockLength, NULL },
263 };
264 
265 static int config_output(AVFilterLink *outlink)
266 {
267  AVFilterContext *ctx = outlink->src;
268  LV2Context *s = ctx->priv;
269  char *p, *arg, *saveptr = NULL;
270  int i, sample_rate;
271 
272  uri_table_init(&s->uri_table);
273  s->map.handle = &s->uri_table;
274  s->map.map = uri_table_map;
275  s->map_feature.URI = LV2_URID_MAP_URI;
276  s->map_feature.data = &s->map;
277  s->unmap.handle = &s->uri_table;
278  s->unmap.unmap = uri_table_unmap;
279  s->unmap_feature.URI = LV2_URID_UNMAP_URI;
280  s->unmap_feature.data = &s->unmap;
281  s->features[0] = &s->map_feature;
282  s->features[1] = &s->unmap_feature;
283  s->features[2] = &buf_size_features[0];
284  s->features[3] = &buf_size_features[1];
285  s->features[4] = &buf_size_features[2];
286 
287  if (ctx->nb_inputs) {
288  AVFilterLink *inlink = ctx->inputs[0];
289 
290  outlink->format = inlink->format;
291  outlink->sample_rate = sample_rate = inlink->sample_rate;
292  if (s->nb_inputs == s->nb_outputs) {
293  int ret;
294  if ((ret = av_channel_layout_copy(&outlink->ch_layout, &inlink->ch_layout)) < 0)
295  return ret;
296  }
297 
298  } else {
299  outlink->sample_rate = sample_rate = s->sample_rate;
300  outlink->time_base = (AVRational){1, s->sample_rate};
301  }
302 
303  s->instance = lilv_plugin_instantiate(s->plugin, sample_rate, s->features);
304  if (!s->instance) {
305  av_log(s, AV_LOG_ERROR, "Failed to instantiate <%s>\n", lilv_node_as_uri(lilv_plugin_get_uri(s->plugin)));
306  return AVERROR(EINVAL);
307  }
308 
309  s->mins = av_calloc(s->nb_ports, sizeof(float));
310  s->maxes = av_calloc(s->nb_ports, sizeof(float));
311  s->controls = av_calloc(s->nb_ports, sizeof(float));
312 
313  if (!s->mins || !s->maxes || !s->controls)
314  return AVERROR(ENOMEM);
315 
316  lilv_plugin_get_port_ranges_float(s->plugin, s->mins, s->maxes, s->controls);
317  s->seq_out = av_malloc(sizeof(LV2_Atom_Sequence) + 9624);
318  if (!s->seq_out)
319  return AVERROR(ENOMEM);
320 
321  if (s->options && !strcmp(s->options, "help")) {
322  if (!s->nb_inputcontrols) {
324  "The '%s' plugin does not have any input controls.\n",
325  s->plugin_uri);
326  } else {
328  "The '%s' plugin has the following input controls:\n",
329  s->plugin_uri);
330  for (i = 0; i < s->nb_ports; i++) {
331  const LilvPort *port = lilv_plugin_get_port_by_index(s->plugin, i);
332  const LilvNode *symbol = lilv_port_get_symbol(s->plugin, port);
333  LilvNode *name = lilv_port_get_name(s->plugin, port);
334 
335  if (lilv_port_is_a(s->plugin, port, s->lv2_InputPort) &&
336  lilv_port_is_a(s->plugin, port, s->lv2_ControlPort)) {
337  av_log(ctx, AV_LOG_INFO, "%s\t\t<float> (from %f to %f) (default %f)\t\t%s\n",
338  lilv_node_as_string(symbol), s->mins[i], s->maxes[i], s->controls[i],
339  lilv_node_as_string(name));
340  }
341 
342  lilv_node_free(name);
343  }
344  }
345  return AVERROR_EXIT;
346  }
347 
348  p = s->options;
349  while (s->options) {
350  const LilvPort *port;
351  LilvNode *sym;
352  float val;
353  char *str, *vstr;
354  int index;
355 
356  if (!(arg = av_strtok(p, " |", &saveptr)))
357  break;
358  p = NULL;
359 
360  vstr = strstr(arg, "=");
361  if (vstr == NULL) {
362  av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
363  return AVERROR(EINVAL);
364  }
365 
366  vstr[0] = 0;
367  str = arg;
368  val = atof(vstr+1);
369  sym = lilv_new_string(s->world, str);
370  port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
371  lilv_node_free(sym);
372  if (!port) {
373  av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", str);
374  } else {
375  index = lilv_port_get_index(s->plugin, port);
376  s->controls[index] = val;
377  }
378  }
379 
380  if (s->nb_inputs &&
381  (lilv_plugin_has_feature(s->plugin, s->powerOf2BlockLength) ||
382  lilv_plugin_has_feature(s->plugin, s->fixedBlockLength) ||
383  lilv_plugin_has_feature(s->plugin, s->boundedBlockLength))) {
384  AVFilterLink *inlink = ctx->inputs[0];
385 
386  inlink->min_samples = inlink->max_samples = 4096;
387  }
388 
389  return 0;
390 }
391 
393 {
394  LV2Context *s = ctx->priv;
395  const LilvPlugins *plugins;
396  const LilvPlugin *plugin;
397  AVFilterPad pad = { NULL };
398  LilvNode *uri;
399  int i, ret;
400 
401  s->world = lilv_world_new();
402  if (!s->world)
403  return AVERROR(ENOMEM);
404 
405  uri = lilv_new_uri(s->world, s->plugin_uri);
406  if (!uri) {
407  av_log(s, AV_LOG_ERROR, "Invalid plugin URI <%s>\n", s->plugin_uri);
408  return AVERROR(EINVAL);
409  }
410 
411  lilv_world_load_all(s->world);
412  plugins = lilv_world_get_all_plugins(s->world);
413  plugin = lilv_plugins_get_by_uri(plugins, uri);
414  lilv_node_free(uri);
415 
416  if (!plugin) {
417  av_log(s, AV_LOG_ERROR, "Plugin <%s> not found\n", s->plugin_uri);
418  return AVERROR(EINVAL);
419  }
420 
421  s->plugin = plugin;
422  s->nb_ports = lilv_plugin_get_num_ports(s->plugin);
423 
424  s->lv2_InputPort = lilv_new_uri(s->world, LV2_CORE__InputPort);
425  s->lv2_OutputPort = lilv_new_uri(s->world, LV2_CORE__OutputPort);
426  s->lv2_AudioPort = lilv_new_uri(s->world, LV2_CORE__AudioPort);
427  s->lv2_ControlPort = lilv_new_uri(s->world, LV2_CORE__ControlPort);
428  s->lv2_Optional = lilv_new_uri(s->world, LV2_CORE__connectionOptional);
429  s->atom_AtomPort = lilv_new_uri(s->world, LV2_ATOM__AtomPort);
430  s->atom_Sequence = lilv_new_uri(s->world, LV2_ATOM__Sequence);
431  s->urid_map = lilv_new_uri(s->world, LV2_URID__map);
432  s->powerOf2BlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__powerOf2BlockLength);
433  s->fixedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__fixedBlockLength);
434  s->boundedBlockLength = lilv_new_uri(s->world, LV2_BUF_SIZE__boundedBlockLength);
435 
436  for (i = 0; i < s->nb_ports; i++) {
437  const LilvPort *lport = lilv_plugin_get_port_by_index(s->plugin, i);
438  int is_input = 0;
439  int is_optional = 0;
440 
441  is_optional = lilv_port_has_property(s->plugin, lport, s->lv2_Optional);
442 
443  if (lilv_port_is_a(s->plugin, lport, s->lv2_InputPort)) {
444  is_input = 1;
445  } else if (!lilv_port_is_a(s->plugin, lport, s->lv2_OutputPort) && !is_optional) {
446  return AVERROR(EINVAL);
447  }
448 
449  if (lilv_port_is_a(s->plugin, lport, s->lv2_ControlPort)) {
450  if (is_input) {
451  s->nb_inputcontrols++;
452  }
453  } else if (lilv_port_is_a(s->plugin, lport, s->lv2_AudioPort)) {
454  if (is_input) {
455  s->nb_inputs++;
456  } else {
457  s->nb_outputs++;
458  }
459  }
460  }
461 
462  pad.type = AVMEDIA_TYPE_AUDIO;
463 
464  if (s->nb_inputs) {
465  pad.name = av_asprintf("in0:%s:%u", s->plugin_uri, s->nb_inputs);
466  if (!pad.name)
467  return AVERROR(ENOMEM);
468 
470  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
471  return ret;
472  }
473 
474  return 0;
475 }
476 
478 {
479  LV2Context *s = ctx->priv;
481  AVFilterLink *outlink = ctx->outputs[0];
482  static const enum AVSampleFormat sample_fmts[] = {
485  if (ret < 0)
486  return ret;
487 
488  if (s->nb_inputs) {
490  if (ret < 0)
491  return ret;
492  } else {
493  int sample_rates[] = { s->sample_rate, -1 };
494 
496  if (ret < 0)
497  return ret;
498  }
499 
500  if (s->nb_inputs == 2 && s->nb_outputs == 2) {
501  layouts = NULL;
503  if (ret < 0)
504  return ret;
506  if (ret < 0)
507  return ret;
508  } else {
509  if (s->nb_inputs >= 1) {
510  AVFilterLink *inlink = ctx->inputs[0];
511  AVChannelLayout inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
512 
513  layouts = NULL;
514  ret = ff_add_channel_layout(&layouts, &inlayout);
515  if (ret < 0)
516  return ret;
517  ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts);
518  if (ret < 0)
519  return ret;
520 
521  if (!s->nb_outputs) {
523  if (ret < 0)
524  return ret;
525  }
526  }
527 
528  if (s->nb_outputs >= 1) {
529  AVChannelLayout outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
530 
531  layouts = NULL;
532  ret = ff_add_channel_layout(&layouts, &outlayout);
533  if (ret < 0)
534  return ret;
536  if (ret < 0)
537  return ret;
538  }
539  }
540 
541  return 0;
542 }
543 
544 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
545  char *res, int res_len, int flags)
546 {
547  LV2Context *s = ctx->priv;
548  const LilvPort *port;
549  LilvNode *sym;
550  int index;
551 
552  sym = lilv_new_string(s->world, cmd);
553  port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
554  lilv_node_free(sym);
555  if (!port) {
556  av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", cmd);
557  } else {
558  index = lilv_port_get_index(s->plugin, port);
559  s->controls[index] = atof(args);
560  }
561  return 0;
562 }
563 
565 {
566  LV2Context *s = ctx->priv;
567 
568  lilv_node_free(s->powerOf2BlockLength);
569  lilv_node_free(s->fixedBlockLength);
570  lilv_node_free(s->boundedBlockLength);
571  lilv_node_free(s->urid_map);
572  lilv_node_free(s->atom_Sequence);
573  lilv_node_free(s->atom_AtomPort);
574  lilv_node_free(s->lv2_Optional);
575  lilv_node_free(s->lv2_ControlPort);
576  lilv_node_free(s->lv2_AudioPort);
577  lilv_node_free(s->lv2_OutputPort);
578  lilv_node_free(s->lv2_InputPort);
579  uri_table_destroy(&s->uri_table);
580  lilv_instance_free(s->instance);
581  lilv_world_free(s->world);
582  av_freep(&s->mins);
583  av_freep(&s->maxes);
584  av_freep(&s->controls);
585  av_freep(&s->seq_out);
586 }
587 
588 static const AVFilterPad lv2_outputs[] = {
589  {
590  .name = "default",
591  .type = AVMEDIA_TYPE_AUDIO,
592  .config_props = config_output,
593  .request_frame = request_frame,
594  },
595 };
596 
598  .name = "lv2",
599  .description = NULL_IF_CONFIG_SMALL("Apply LV2 effect."),
600  .priv_size = sizeof(LV2Context),
601  .priv_class = &lv2_class,
602  .init = init,
603  .uninit = uninit,
605  .inputs = 0,
609 };
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:97
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:544
LV2Context::lv2_OutputPort
LilvNode * lv2_OutputPort
Definition: af_lv2.c:85
LV2Context::sample_rate
int sample_rate
Definition: af_lv2.c:54
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:48
AVFilterFormatsConfig::channel_layouts
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:520
out
FILE * out
Definition: movenc.c:55
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:379
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1015
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:674
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:337
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
LV2Context::world
LilvWorld * world
Definition: af_lv2.c:59
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:816
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:115
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:160
lv2_outputs
static const AVFilterPad lv2_outputs[]
Definition: af_lv2.c:588
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:375
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
OFFSET
#define OFFSET(x)
Definition: af_lv2.c:92
AVOption
AVOption.
Definition: opt.h:346
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
table
static const uint16_t table[]
Definition: prosumer.c:205
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:249
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_lv2.c:392
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:463
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:822
connect_ports
static void connect_ports(LV2Context *s, AVFrame *in, AVFrame *out)
Definition: af_lv2.c:169
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
lv2_options
static const AVOption lv2_options[]
Definition: af_lv2.c:95
sample_rate
sample_rate
Definition: ffmpeg_filter.c:424
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
formats.h
LV2Context::lv2_ControlPort
LilvNode * lv2_ControlPort
Definition: af_lv2.c:82
ff_af_lv2
const AVFilter ff_af_lv2
Definition: af_lv2.c:597
URITable
Definition: af_lv2.c:40
LV2Context::lv2_AudioPort
LilvNode * lv2_AudioPort
Definition: af_lv2.c:80
val
static double val(void *priv, double ch)
Definition: aeval.c:78
LV2Context::fixedBlockLength
LilvNode * fixedBlockLength
Definition: af_lv2.c:88
LV2Context::nb_inputs
unsigned nb_inputs
Definition: af_lv2.c:50
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
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_lv2.c:477
LV2Context::duration
int64_t duration
Definition: af_lv2.c:57
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:65
s
#define s(width, name)
Definition: cbs_vp9.c:198
LV2Context::pts
int64_t pts
Definition: af_lv2.c:56
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
LV2Context::nb_outputs
unsigned nb_outputs
Definition: af_lv2.c:52
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:178
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:874
LV2Context::features
const LV2_Feature * features[5]
Definition: af_lv2.c:70
URITable::n_uris
size_t n_uris
Definition: af_lv2.c:42
ctx
AVFormatContext * ctx
Definition: movenc.c:49
FLAGS
#define FLAGS
Definition: af_lv2.c:93
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_lv2.c:564
LV2Context::lv2_Optional
LilvNode * lv2_Optional
Definition: af_lv2.c:83
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:89
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:709
LV2Context::lv2_InputPort
LilvNode * lv2_InputPort
Definition: af_lv2.c:84
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:132
LV2Context::map
LV2_URID_Map map
Definition: af_lv2.c:64
AVFilterPad::filter_frame
int(* filter_frame)(AVFilterLink *link, AVFrame *frame)
Filtering callback.
Definition: internal.h:88
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:522
uri_table_init
static void uri_table_init(URITable *table)
Definition: af_lv2.c:111
index
int index
Definition: gxfenc.c:90
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_lv2.c:202
uri_table_destroy
static void uri_table_destroy(URITable *table)
Definition: af_lv2.c:117
LV2Context::seq_out
LV2_Atom_Sequence * seq_out
Definition: af_lv2.c:69
LV2Context::nb_inputcontrols
unsigned nb_inputcontrols
Definition: af_lv2.c:51
options
const OptionDef options[]
LV2Context::lv2_CVPort
LilvNode * lv2_CVPort
Definition: af_lv2.c:81
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:94
LV2Context::uri_table
URITable uri_table
Definition: af_lv2.c:63
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:303
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:128
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:645
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: af_lv2.c:230
LV2Context::map_feature
LV2_Feature map_feature
Definition: af_lv2.c:65
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
sample_rates
sample_rates
Definition: ffmpeg_filter.c:424
internal.h
URITable::uris
char ** uris
Definition: af_lv2.c:41
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:455
LV2Context::nb_ports
uint32_t nb_ports
Definition: af_lv2.c:61
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
LV2Context
Definition: af_lv2.c:45
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:436
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
LV2Context::atom_AtomPort
LilvNode * atom_AtomPort
Definition: af_lv2.c:78
len
int len
Definition: vorbis_enc_data.h:426
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(lv2)
LV2Context::powerOf2BlockLength
LilvNode * powerOf2BlockLength
Definition: af_lv2.c:87
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:264
LV2Context::values
float * values
Definition: af_lv2.c:62
AVFilter
Filter definition.
Definition: avfilter.h:166
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:44
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:265
buf_size_features
static const LV2_Feature buf_size_features[3]
Definition: af_lv2.c:259
LV2Context::urid_map
LilvNode * urid_map
Definition: af_lv2.c:86
LV2Context::plugin_uri
char * plugin_uri
Definition: af_lv2.c:47
uri_table_unmap
static const char * uri_table_unmap(LV2_URID_Map_Handle handle, LV2_URID urid)
Definition: af_lv2.c:158
channel_layout.h
LV2Context::atom_Sequence
LilvNode * atom_Sequence
Definition: af_lv2.c:79
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:235
avfilter.h
LV2Context::nb_samples
int nb_samples
Definition: af_lv2.c:55
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
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:440
mem.h
audio.h
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
LV2Context::mins
float * mins
Definition: af_lv2.c:72
LV2Context::controls
float * controls
Definition: af_lv2.c:74
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
LV2Context::instance
LilvInstance * instance
Definition: af_lv2.c:76
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
LV2Context::seq_in
LV2_Atom_Sequence seq_in[2]
Definition: af_lv2.c:68
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:239
LV2Context::maxes
float * maxes
Definition: af_lv2.c:73
LV2Context::unmap
LV2_URID_Unmap unmap
Definition: af_lv2.c:66
LV2Context::plugin
const LilvPlugin * plugin
Definition: af_lv2.c:60
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:791
LV2Context::unmap_feature
LV2_Feature unmap_feature
Definition: af_lv2.c:67