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