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path: root/libavfilter/af_ladspa.c (plain)
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1/*
2 * Copyright (c) 2013 Paul B Mahol
3 * Copyright (c) 2011 Mina Nagy Zaki
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 * LADSPA wrapper
25 */
26
27#include <dlfcn.h>
28#include <ladspa.h>
29#include "libavutil/avassert.h"
30#include "libavutil/avstring.h"
31#include "libavutil/channel_layout.h"
32#include "libavutil/opt.h"
33#include "audio.h"
34#include "avfilter.h"
35#include "internal.h"
36
37typedef struct LADSPAContext {
38 const AVClass *class;
39 char *dl_name;
40 char *plugin;
41 char *options;
42 void *dl_handle;
43
44 unsigned long nb_inputs;
45 unsigned long *ipmap; /* map input number to port number */
46
47 unsigned long nb_inputcontrols;
48 unsigned long *icmap; /* map input control number to port number */
49 LADSPA_Data *ictlv; /* input controls values */
50
51 unsigned long nb_outputs;
52 unsigned long *opmap; /* map output number to port number */
53
54 unsigned long nb_outputcontrols;
55 unsigned long *ocmap; /* map output control number to port number */
56 LADSPA_Data *octlv; /* output controls values */
57
58 const LADSPA_Descriptor *desc;
59 int *ctl_needs_value;
60 int nb_handles;
61 LADSPA_Handle *handles;
62
63 int sample_rate;
64 int nb_samples;
65 int64_t pts;
66 int64_t duration;
67} LADSPAContext;
68
69#define OFFSET(x) offsetof(LADSPAContext, x)
70#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
71static const AVOption ladspa_options[] = {
72 { "file", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
73 { "f", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
74 { "plugin", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
75 { "p", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
76 { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
77 { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
78 { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
79 { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
80 { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
81 { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
82 { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
83 { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
84 { NULL }
85};
86
87AVFILTER_DEFINE_CLASS(ladspa);
88
89static void print_ctl_info(AVFilterContext *ctx, int level,
90 LADSPAContext *s, int ctl, unsigned long *map,
91 LADSPA_Data *values, int print)
92{
93 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
94
95 av_log(ctx, level, "c%i: %s [", ctl, s->desc->PortNames[map[ctl]]);
96
97 if (LADSPA_IS_HINT_TOGGLED(h->HintDescriptor)) {
98 av_log(ctx, level, "toggled (1 or 0)");
99
100 if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
101 av_log(ctx, level, " (default %i)", (int)values[ctl]);
102 } else {
103 if (LADSPA_IS_HINT_INTEGER(h->HintDescriptor)) {
104 av_log(ctx, level, "<int>");
105
106 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
107 av_log(ctx, level, ", min: %i", (int)h->LowerBound);
108
109 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
110 av_log(ctx, level, ", max: %i", (int)h->UpperBound);
111
112 if (print)
113 av_log(ctx, level, " (value %d)", (int)values[ctl]);
114 else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
115 av_log(ctx, level, " (default %d)", (int)values[ctl]);
116 } else {
117 av_log(ctx, level, "<float>");
118
119 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
120 av_log(ctx, level, ", min: %f", h->LowerBound);
121
122 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
123 av_log(ctx, level, ", max: %f", h->UpperBound);
124
125 if (print)
126 av_log(ctx, level, " (value %f)", values[ctl]);
127 else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
128 av_log(ctx, level, " (default %f)", values[ctl]);
129 }
130
131 if (LADSPA_IS_HINT_SAMPLE_RATE(h->HintDescriptor))
132 av_log(ctx, level, ", multiple of sample rate");
133
134 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
135 av_log(ctx, level, ", logarithmic scale");
136 }
137
138 av_log(ctx, level, "]\n");
139}
140
141static int filter_frame(AVFilterLink *inlink, AVFrame *in)
142{
143 AVFilterContext *ctx = inlink->dst;
144 LADSPAContext *s = ctx->priv;
145 AVFrame *out;
146 int i, h, p;
147
148 av_assert0(in->channels == (s->nb_inputs * s->nb_handles));
149
150 if (!s->nb_outputs ||
151 (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs &&
152 !(s->desc->Properties & LADSPA_PROPERTY_INPLACE_BROKEN))) {
153 out = in;
154 } else {
155 out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
156 if (!out) {
157 av_frame_free(&in);
158 return AVERROR(ENOMEM);
159 }
160 av_frame_copy_props(out, in);
161 }
162
163 av_assert0(!s->nb_outputs || out->channels == (s->nb_outputs * s->nb_handles));
164
165 for (h = 0; h < s->nb_handles; h++) {
166 for (i = 0; i < s->nb_inputs; i++) {
167 p = s->nb_handles > 1 ? h : i;
168 s->desc->connect_port(s->handles[h], s->ipmap[i],
169 (LADSPA_Data*)in->extended_data[p]);
170 }
171
172 for (i = 0; i < s->nb_outputs; i++) {
173 p = s->nb_handles > 1 ? h : i;
174 s->desc->connect_port(s->handles[h], s->opmap[i],
175 (LADSPA_Data*)out->extended_data[p]);
176 }
177
178 s->desc->run(s->handles[h], in->nb_samples);
179 }
180
181 for (i = 0; i < s->nb_outputcontrols; i++)
182 print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1);
183
184 if (out != in)
185 av_frame_free(&in);
186
187 return ff_filter_frame(ctx->outputs[0], out);
188}
189
190static int request_frame(AVFilterLink *outlink)
191{
192 AVFilterContext *ctx = outlink->src;
193 LADSPAContext *s = ctx->priv;
194 AVFrame *out;
195 int64_t t;
196 int i;
197
198 if (ctx->nb_inputs)
199 return ff_request_frame(ctx->inputs[0]);
200
201 t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
202 if (s->duration >= 0 && t >= s->duration)
203 return AVERROR_EOF;
204
205 out = ff_get_audio_buffer(outlink, s->nb_samples);
206 if (!out)
207 return AVERROR(ENOMEM);
208
209 for (i = 0; i < s->nb_outputs; i++)
210 s->desc->connect_port(s->handles[0], s->opmap[i],
211 (LADSPA_Data*)out->extended_data[i]);
212
213 s->desc->run(s->handles[0], s->nb_samples);
214
215 for (i = 0; i < s->nb_outputcontrols; i++)
216 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1);
217
218 out->sample_rate = s->sample_rate;
219 out->pts = s->pts;
220 s->pts += s->nb_samples;
221
222 return ff_filter_frame(outlink, out);
223}
224
225static void set_default_ctl_value(LADSPAContext *s, int ctl,
226 unsigned long *map, LADSPA_Data *values)
227{
228 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
229 const LADSPA_Data lower = h->LowerBound;
230 const LADSPA_Data upper = h->UpperBound;
231
232 if (LADSPA_IS_HINT_DEFAULT_MINIMUM(h->HintDescriptor)) {
233 values[ctl] = lower;
234 } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(h->HintDescriptor)) {
235 values[ctl] = upper;
236 } else if (LADSPA_IS_HINT_DEFAULT_0(h->HintDescriptor)) {
237 values[ctl] = 0.0;
238 } else if (LADSPA_IS_HINT_DEFAULT_1(h->HintDescriptor)) {
239 values[ctl] = 1.0;
240 } else if (LADSPA_IS_HINT_DEFAULT_100(h->HintDescriptor)) {
241 values[ctl] = 100.0;
242 } else if (LADSPA_IS_HINT_DEFAULT_440(h->HintDescriptor)) {
243 values[ctl] = 440.0;
244 } else if (LADSPA_IS_HINT_DEFAULT_LOW(h->HintDescriptor)) {
245 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
246 values[ctl] = exp(log(lower) * 0.75 + log(upper) * 0.25);
247 else
248 values[ctl] = lower * 0.75 + upper * 0.25;
249 } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(h->HintDescriptor)) {
250 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
251 values[ctl] = exp(log(lower) * 0.5 + log(upper) * 0.5);
252 else
253 values[ctl] = lower * 0.5 + upper * 0.5;
254 } else if (LADSPA_IS_HINT_DEFAULT_HIGH(h->HintDescriptor)) {
255 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
256 values[ctl] = exp(log(lower) * 0.25 + log(upper) * 0.75);
257 else
258 values[ctl] = lower * 0.25 + upper * 0.75;
259 }
260}
261
262static int connect_ports(AVFilterContext *ctx, AVFilterLink *link)
263{
264 LADSPAContext *s = ctx->priv;
265 int i, j;
266
267 s->nb_handles = s->nb_inputs == 1 && s->nb_outputs == 1 ? link->channels : 1;
268 s->handles = av_calloc(s->nb_handles, sizeof(*s->handles));
269 if (!s->handles)
270 return AVERROR(ENOMEM);
271
272 for (i = 0; i < s->nb_handles; i++) {
273 s->handles[i] = s->desc->instantiate(s->desc, link->sample_rate);
274 if (!s->handles[i]) {
275 av_log(ctx, AV_LOG_ERROR, "Could not instantiate plugin.\n");
276 return AVERROR_EXTERNAL;
277 }
278
279 // Connect the input control ports
280 for (j = 0; j < s->nb_inputcontrols; j++)
281 s->desc->connect_port(s->handles[i], s->icmap[j], s->ictlv + j);
282
283 // Connect the output control ports
284 for (j = 0; j < s->nb_outputcontrols; j++)
285 s->desc->connect_port(s->handles[i], s->ocmap[j], &s->octlv[j]);
286
287 if (s->desc->activate)
288 s->desc->activate(s->handles[i]);
289 }
290
291 av_log(ctx, AV_LOG_DEBUG, "handles: %d\n", s->nb_handles);
292
293 return 0;
294}
295
296static int config_input(AVFilterLink *inlink)
297{
298 AVFilterContext *ctx = inlink->dst;
299
300 return connect_ports(ctx, inlink);
301}
302
303static int config_output(AVFilterLink *outlink)
304{
305 AVFilterContext *ctx = outlink->src;
306 LADSPAContext *s = ctx->priv;
307 int ret;
308
309 if (ctx->nb_inputs) {
310 AVFilterLink *inlink = ctx->inputs[0];
311
312 outlink->format = inlink->format;
313 outlink->sample_rate = inlink->sample_rate;
314 if (s->nb_inputs == s->nb_outputs) {
315 outlink->channel_layout = inlink->channel_layout;
316 outlink->channels = inlink->channels;
317 }
318
319 ret = 0;
320 } else {
321 LADSPAContext *s = ctx->priv;
322
323 outlink->sample_rate = s->sample_rate;
324 outlink->time_base = (AVRational){1, s->sample_rate};
325
326 ret = connect_ports(ctx, outlink);
327 }
328
329 return ret;
330}
331
332static void count_ports(const LADSPA_Descriptor *desc,
333 unsigned long *nb_inputs, unsigned long *nb_outputs)
334{
335 LADSPA_PortDescriptor pd;
336 int i;
337
338 for (i = 0; i < desc->PortCount; i++) {
339 pd = desc->PortDescriptors[i];
340
341 if (LADSPA_IS_PORT_AUDIO(pd)) {
342 if (LADSPA_IS_PORT_INPUT(pd)) {
343 (*nb_inputs)++;
344 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
345 (*nb_outputs)++;
346 }
347 }
348 }
349}
350
351static void *try_load(const char *dir, const char *soname)
352{
353 char *path = av_asprintf("%s/%s.so", dir, soname);
354 void *ret = NULL;
355
356 if (path) {
357 ret = dlopen(path, RTLD_LOCAL|RTLD_NOW);
358 av_free(path);
359 }
360
361 return ret;
362}
363
364static int set_control(AVFilterContext *ctx, unsigned long port, LADSPA_Data value)
365{
366 LADSPAContext *s = ctx->priv;
367 const char *label = s->desc->Label;
368 LADSPA_PortRangeHint *h = (LADSPA_PortRangeHint *)s->desc->PortRangeHints +
369 s->icmap[port];
370
371 if (port >= s->nb_inputcontrols) {
372 av_log(ctx, AV_LOG_ERROR, "Control c%ld is out of range [0 - %lu].\n",
373 port, s->nb_inputcontrols);
374 return AVERROR(EINVAL);
375 }
376
377 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor) &&
378 value < h->LowerBound) {
379 av_log(ctx, AV_LOG_ERROR,
380 "%s: input control c%ld is below lower boundary of %0.4f.\n",
381 label, port, h->LowerBound);
382 return AVERROR(EINVAL);
383 }
384
385 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor) &&
386 value > h->UpperBound) {
387 av_log(ctx, AV_LOG_ERROR,
388 "%s: input control c%ld is above upper boundary of %0.4f.\n",
389 label, port, h->UpperBound);
390 return AVERROR(EINVAL);
391 }
392
393 s->ictlv[port] = value;
394
395 return 0;
396}
397
398static av_cold int init(AVFilterContext *ctx)
399{
400 LADSPAContext *s = ctx->priv;
401 LADSPA_Descriptor_Function descriptor_fn;
402 const LADSPA_Descriptor *desc;
403 LADSPA_PortDescriptor pd;
404 AVFilterPad pad = { NULL };
405 char *p, *arg, *saveptr = NULL;
406 unsigned long nb_ports;
407 int i, j = 0;
408
409 if (!s->dl_name) {
410 av_log(ctx, AV_LOG_ERROR, "No plugin name provided\n");
411 return AVERROR(EINVAL);
412 }
413
414 if (s->dl_name[0] == '/' || s->dl_name[0] == '.') {
415 // argument is a path
416 s->dl_handle = dlopen(s->dl_name, RTLD_LOCAL|RTLD_NOW);
417 } else {
418 // argument is a shared object name
419 char *paths = av_strdup(getenv("LADSPA_PATH"));
420 const char *separator = ":";
421
422 if (paths) {
423 p = paths;
424 while ((arg = av_strtok(p, separator, &saveptr)) && !s->dl_handle) {
425 s->dl_handle = try_load(arg, s->dl_name);
426 p = NULL;
427 }
428 }
429
430 av_free(paths);
431 if (!s->dl_handle && (paths = av_asprintf("%s/.ladspa/lib", getenv("HOME")))) {
432 s->dl_handle = try_load(paths, s->dl_name);
433 av_free(paths);
434 }
435
436 if (!s->dl_handle)
437 s->dl_handle = try_load("/usr/local/lib/ladspa", s->dl_name);
438
439 if (!s->dl_handle)
440 s->dl_handle = try_load("/usr/lib/ladspa", s->dl_name);
441 }
442 if (!s->dl_handle) {
443 av_log(ctx, AV_LOG_ERROR, "Failed to load '%s'\n", s->dl_name);
444 return AVERROR(EINVAL);
445 }
446
447 descriptor_fn = dlsym(s->dl_handle, "ladspa_descriptor");
448 if (!descriptor_fn) {
449 av_log(ctx, AV_LOG_ERROR, "Could not find ladspa_descriptor: %s\n", dlerror());
450 return AVERROR(EINVAL);
451 }
452
453 // Find the requested plugin, or list plugins
454 if (!s->plugin) {
455 av_log(ctx, AV_LOG_INFO, "The '%s' library contains the following plugins:\n", s->dl_name);
456 av_log(ctx, AV_LOG_INFO, "I = Input Channels\n");
457 av_log(ctx, AV_LOG_INFO, "O = Output Channels\n");
458 av_log(ctx, AV_LOG_INFO, "I:O %-25s %s\n", "Plugin", "Description");
459 av_log(ctx, AV_LOG_INFO, "\n");
460 for (i = 0; desc = descriptor_fn(i); i++) {
461 unsigned long inputs = 0, outputs = 0;
462
463 count_ports(desc, &inputs, &outputs);
464 av_log(ctx, AV_LOG_INFO, "%lu:%lu %-25s %s\n", inputs, outputs, desc->Label,
465 (char *)av_x_if_null(desc->Name, "?"));
466 av_log(ctx, AV_LOG_VERBOSE, "Maker: %s\n",
467 (char *)av_x_if_null(desc->Maker, "?"));
468 av_log(ctx, AV_LOG_VERBOSE, "Copyright: %s\n",
469 (char *)av_x_if_null(desc->Copyright, "?"));
470 }
471 return AVERROR_EXIT;
472 } else {
473 for (i = 0;; i++) {
474 desc = descriptor_fn(i);
475 if (!desc) {
476 av_log(ctx, AV_LOG_ERROR, "Could not find plugin: %s\n", s->plugin);
477 return AVERROR(EINVAL);
478 }
479
480 if (desc->Label && !strcmp(desc->Label, s->plugin))
481 break;
482 }
483 }
484
485 s->desc = desc;
486 nb_ports = desc->PortCount;
487
488 s->ipmap = av_calloc(nb_ports, sizeof(*s->ipmap));
489 s->opmap = av_calloc(nb_ports, sizeof(*s->opmap));
490 s->icmap = av_calloc(nb_ports, sizeof(*s->icmap));
491 s->ocmap = av_calloc(nb_ports, sizeof(*s->ocmap));
492 s->ictlv = av_calloc(nb_ports, sizeof(*s->ictlv));
493 s->octlv = av_calloc(nb_ports, sizeof(*s->octlv));
494 s->ctl_needs_value = av_calloc(nb_ports, sizeof(*s->ctl_needs_value));
495 if (!s->ipmap || !s->opmap || !s->icmap ||
496 !s->ocmap || !s->ictlv || !s->octlv || !s->ctl_needs_value)
497 return AVERROR(ENOMEM);
498
499 for (i = 0; i < nb_ports; i++) {
500 pd = desc->PortDescriptors[i];
501
502 if (LADSPA_IS_PORT_AUDIO(pd)) {
503 if (LADSPA_IS_PORT_INPUT(pd)) {
504 s->ipmap[s->nb_inputs] = i;
505 s->nb_inputs++;
506 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
507 s->opmap[s->nb_outputs] = i;
508 s->nb_outputs++;
509 }
510 } else if (LADSPA_IS_PORT_CONTROL(pd)) {
511 if (LADSPA_IS_PORT_INPUT(pd)) {
512 s->icmap[s->nb_inputcontrols] = i;
513
514 if (LADSPA_IS_HINT_HAS_DEFAULT(desc->PortRangeHints[i].HintDescriptor))
515 set_default_ctl_value(s, s->nb_inputcontrols, s->icmap, s->ictlv);
516 else
517 s->ctl_needs_value[s->nb_inputcontrols] = 1;
518
519 s->nb_inputcontrols++;
520 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
521 s->ocmap[s->nb_outputcontrols] = i;
522 s->nb_outputcontrols++;
523 }
524 }
525 }
526
527 // List Control Ports if "help" is specified
528 if (s->options && !strcmp(s->options, "help")) {
529 if (!s->nb_inputcontrols) {
530 av_log(ctx, AV_LOG_INFO,
531 "The '%s' plugin does not have any input controls.\n",
532 desc->Label);
533 } else {
534 av_log(ctx, AV_LOG_INFO,
535 "The '%s' plugin has the following input controls:\n",
536 desc->Label);
537 for (i = 0; i < s->nb_inputcontrols; i++)
538 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->icmap, s->ictlv, 0);
539 }
540 return AVERROR_EXIT;
541 }
542
543 // Parse control parameters
544 p = s->options;
545 while (s->options) {
546 LADSPA_Data val;
547 int ret;
548
549 if (!(arg = av_strtok(p, " |", &saveptr)))
550 break;
551 p = NULL;
552
553 if (sscanf(arg, "c%d=%f", &i, &val) != 2) {
554 if (sscanf(arg, "%f", &val) != 1) {
555 av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
556 return AVERROR(EINVAL);
557 }
558 i = j++;
559 }
560
561 if ((ret = set_control(ctx, i, val)) < 0)
562 return ret;
563 s->ctl_needs_value[i] = 0;
564 }
565
566 // Check if any controls are not set
567 for (i = 0; i < s->nb_inputcontrols; i++) {
568 if (s->ctl_needs_value[i]) {
569 av_log(ctx, AV_LOG_ERROR, "Control c%d must be set.\n", i);
570 print_ctl_info(ctx, AV_LOG_ERROR, s, i, s->icmap, s->ictlv, 0);
571 return AVERROR(EINVAL);
572 }
573 }
574
575 pad.type = AVMEDIA_TYPE_AUDIO;
576
577 if (s->nb_inputs) {
578 pad.name = av_asprintf("in0:%s%lu", desc->Label, s->nb_inputs);
579 if (!pad.name)
580 return AVERROR(ENOMEM);
581
582 pad.filter_frame = filter_frame;
583 pad.config_props = config_input;
584 if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) {
585 av_freep(&pad.name);
586 return AVERROR(ENOMEM);
587 }
588 }
589
590 av_log(ctx, AV_LOG_DEBUG, "ports: %lu\n", nb_ports);
591 av_log(ctx, AV_LOG_DEBUG, "inputs: %lu outputs: %lu\n",
592 s->nb_inputs, s->nb_outputs);
593 av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n",
594 s->nb_inputcontrols, s->nb_outputcontrols);
595
596 return 0;
597}
598
599static int query_formats(AVFilterContext *ctx)
600{
601 LADSPAContext *s = ctx->priv;
602 AVFilterFormats *formats;
603 AVFilterChannelLayouts *layouts;
604 static const enum AVSampleFormat sample_fmts[] = {
605 AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
606 int ret;
607
608 formats = ff_make_format_list(sample_fmts);
609 if (!formats)
610 return AVERROR(ENOMEM);
611 ret = ff_set_common_formats(ctx, formats);
612 if (ret < 0)
613 return ret;
614
615 if (s->nb_inputs) {
616 formats = ff_all_samplerates();
617 if (!formats)
618 return AVERROR(ENOMEM);
619
620 ret = ff_set_common_samplerates(ctx, formats);
621 if (ret < 0)
622 return ret;
623 } else {
624 int sample_rates[] = { s->sample_rate, -1 };
625
626 ret = ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates));
627 if (ret < 0)
628 return ret;
629 }
630
631 if (s->nb_inputs == 1 && s->nb_outputs == 1) {
632 // We will instantiate multiple LADSPA_Handle, one over each channel
633 layouts = ff_all_channel_counts();
634 if (!layouts)
635 return AVERROR(ENOMEM);
636
637 ret = ff_set_common_channel_layouts(ctx, layouts);
638 if (ret < 0)
639 return ret;
640 } else if (s->nb_inputs == 2 && s->nb_outputs == 2) {
641 layouts = NULL;
642 ret = ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO);
643 if (ret < 0)
644 return ret;
645 ret = ff_set_common_channel_layouts(ctx, layouts);
646 if (ret < 0)
647 return ret;
648 } else {
649 AVFilterLink *outlink = ctx->outputs[0];
650
651 if (s->nb_inputs >= 1) {
652 AVFilterLink *inlink = ctx->inputs[0];
653 uint64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
654
655 layouts = NULL;
656 ret = ff_add_channel_layout(&layouts, inlayout);
657 if (ret < 0)
658 return ret;
659 ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts);
660 if (ret < 0)
661 return ret;
662
663 if (!s->nb_outputs) {
664 ret = ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
665 if (ret < 0)
666 return ret;
667 }
668 }
669
670 if (s->nb_outputs >= 1) {
671 uint64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
672
673 layouts = NULL;
674 ret = ff_add_channel_layout(&layouts, outlayout);
675 if (ret < 0)
676 return ret;
677 ret = ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
678 if (ret < 0)
679 return ret;
680 }
681 }
682
683 return 0;
684}
685
686static av_cold void uninit(AVFilterContext *ctx)
687{
688 LADSPAContext *s = ctx->priv;
689 int i;
690
691 for (i = 0; i < s->nb_handles; i++) {
692 if (s->desc->deactivate)
693 s->desc->deactivate(s->handles[i]);
694 if (s->desc->cleanup)
695 s->desc->cleanup(s->handles[i]);
696 }
697
698 if (s->dl_handle)
699 dlclose(s->dl_handle);
700
701 av_freep(&s->ipmap);
702 av_freep(&s->opmap);
703 av_freep(&s->icmap);
704 av_freep(&s->ocmap);
705 av_freep(&s->ictlv);
706 av_freep(&s->octlv);
707 av_freep(&s->handles);
708 av_freep(&s->ctl_needs_value);
709
710 if (ctx->nb_inputs)
711 av_freep(&ctx->input_pads[0].name);
712}
713
714static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
715 char *res, int res_len, int flags)
716{
717 LADSPA_Data value;
718 unsigned long port;
719
720 if (sscanf(cmd, "c%ld", &port) + sscanf(args, "%f", &value) != 2)
721 return AVERROR(EINVAL);
722
723 return set_control(ctx, port, value);
724}
725
726static const AVFilterPad ladspa_outputs[] = {
727 {
728 .name = "default",
729 .type = AVMEDIA_TYPE_AUDIO,
730 .config_props = config_output,
731 .request_frame = request_frame,
732 },
733 { NULL }
734};
735
736AVFilter ff_af_ladspa = {
737 .name = "ladspa",
738 .description = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."),
739 .priv_size = sizeof(LADSPAContext),
740 .priv_class = &ladspa_class,
741 .init = init,
742 .uninit = uninit,
743 .query_formats = query_formats,
744 .process_command = process_command,
745 .inputs = 0,
746 .outputs = ladspa_outputs,
747 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
748};
749
generated by cgit at 2024-05-17 06:31:39 (GMT)