2 * Copyright (c) 2013 Paul B Mahol
3 * Copyright (c) 2011 Mina Nagy Zaki
5 * This file is part of FFmpeg.
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.
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.
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
29 #include "libavutil/avstring.h"
30 #include "libavutil/channel_layout.h"
31 #include "libavutil/opt.h"
36 typedef struct LADSPAContext {
43 unsigned long nb_inputs;
44 unsigned long *ipmap; /* map input number to port number */
46 unsigned long nb_inputcontrols;
47 unsigned long *icmap; /* map input control number to port number */
48 LADSPA_Data *ictlv; /* input controls values */
50 unsigned long nb_outputs;
51 unsigned long *opmap; /* map output number to port number */
53 unsigned long nb_outputcontrols;
54 unsigned long *ocmap; /* map output control number to port number */
55 LADSPA_Data *octlv; /* output controls values */
57 const LADSPA_Descriptor *desc;
60 LADSPA_Handle *handles;
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 },
86 AVFILTER_DEFINE_CLASS(ladspa);
88 static void print_ctl_info(AVFilterContext *ctx, int level,
89 LADSPAContext *s, int ctl, unsigned long *map,
90 LADSPA_Data *values, int print)
92 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
94 av_log(ctx, level, "c%i: %s [", ctl, s->desc->PortNames[map[ctl]]);
96 if (LADSPA_IS_HINT_TOGGLED(h->HintDescriptor)) {
97 av_log(ctx, level, "toggled (1 or 0)");
99 if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
100 av_log(ctx, level, " (default %i)", (int)values[ctl]);
102 if (LADSPA_IS_HINT_INTEGER(h->HintDescriptor)) {
103 av_log(ctx, level, "<int>");
105 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
106 av_log(ctx, level, ", min: %i", (int)h->LowerBound);
108 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
109 av_log(ctx, level, ", max: %i", (int)h->UpperBound);
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]);
116 av_log(ctx, level, "<float>");
118 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
119 av_log(ctx, level, ", min: %f", h->LowerBound);
121 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
122 av_log(ctx, level, ", max: %f", h->UpperBound);
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]);
130 if (LADSPA_IS_HINT_SAMPLE_RATE(h->HintDescriptor))
131 av_log(ctx, level, ", multiple of sample rate");
133 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
134 av_log(ctx, level, ", logarithmic scale");
137 av_log(ctx, level, "]\n");
140 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
142 AVFilterContext *ctx = inlink->dst;
143 LADSPAContext *s = ctx->priv;
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))) {
152 out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
155 return AVERROR(ENOMEM);
157 av_frame_copy_props(out, in);
160 for (h = 0; h < s->nb_handles; h++) {
161 for (i = 0; i < s->nb_inputs; i++) {
162 p = s->nb_handles > 1 ? h : i;
163 s->desc->connect_port(s->handles[h], s->ipmap[i],
164 (LADSPA_Data*)in->extended_data[p]);
167 for (i = 0; i < s->nb_outputs; i++) {
168 p = s->nb_handles > 1 ? h : i;
169 s->desc->connect_port(s->handles[h], s->opmap[i],
170 (LADSPA_Data*)out->extended_data[p]);
173 s->desc->run(s->handles[h], in->nb_samples);
176 for (i = 0; i < s->nb_outputcontrols; i++)
177 print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1);
182 return ff_filter_frame(ctx->outputs[0], out);
185 static int request_frame(AVFilterLink *outlink)
187 AVFilterContext *ctx = outlink->src;
188 LADSPAContext *s = ctx->priv;
194 return ff_request_frame(ctx->inputs[0]);
196 t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
197 if (s->duration >= 0 && t >= s->duration)
200 out = ff_get_audio_buffer(outlink, s->nb_samples);
202 return AVERROR(ENOMEM);
204 for (i = 0; i < s->nb_outputs; i++)
205 s->desc->connect_port(s->handles[0], s->opmap[i],
206 (LADSPA_Data*)out->extended_data[i]);
208 s->desc->run(s->handles[0], s->nb_samples);
210 for (i = 0; i < s->nb_outputcontrols; i++)
211 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1);
213 out->sample_rate = s->sample_rate;
215 s->pts += s->nb_samples;
217 return ff_filter_frame(outlink, out);
220 static void set_default_ctl_value(LADSPAContext *s, int ctl,
221 unsigned long *map, LADSPA_Data *values)
223 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
224 const LADSPA_Data lower = h->LowerBound;
225 const LADSPA_Data upper = h->UpperBound;
227 if (LADSPA_IS_HINT_DEFAULT_MINIMUM(h->HintDescriptor)) {
229 } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(h->HintDescriptor)) {
231 } else if (LADSPA_IS_HINT_DEFAULT_0(h->HintDescriptor)) {
233 } else if (LADSPA_IS_HINT_DEFAULT_1(h->HintDescriptor)) {
235 } else if (LADSPA_IS_HINT_DEFAULT_100(h->HintDescriptor)) {
237 } else if (LADSPA_IS_HINT_DEFAULT_440(h->HintDescriptor)) {
239 } else if (LADSPA_IS_HINT_DEFAULT_LOW(h->HintDescriptor)) {
240 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
241 values[ctl] = exp(log(lower) * 0.75 + log(upper) * 0.25);
243 values[ctl] = lower * 0.75 + upper * 0.25;
244 } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(h->HintDescriptor)) {
245 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
246 values[ctl] = exp(log(lower) * 0.5 + log(upper) * 0.5);
248 values[ctl] = lower * 0.5 + upper * 0.5;
249 } else if (LADSPA_IS_HINT_DEFAULT_HIGH(h->HintDescriptor)) {
250 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
251 values[ctl] = exp(log(lower) * 0.25 + log(upper) * 0.75);
253 values[ctl] = lower * 0.25 + upper * 0.75;
257 static int connect_ports(AVFilterContext *ctx, AVFilterLink *link)
259 LADSPAContext *s = ctx->priv;
262 s->nb_handles = s->nb_inputs == 1 && s->nb_outputs == 1 ? link->channels : 1;
263 s->handles = av_calloc(s->nb_handles, sizeof(*s->handles));
265 return AVERROR(ENOMEM);
267 for (i = 0; i < s->nb_handles; i++) {
268 s->handles[i] = s->desc->instantiate(s->desc, link->sample_rate);
269 if (!s->handles[i]) {
270 av_log(ctx, AV_LOG_ERROR, "Could not instantiate plugin.\n");
271 return AVERROR_EXTERNAL;
274 // Connect the input control ports
275 for (j = 0; j < s->nb_inputcontrols; j++)
276 s->desc->connect_port(s->handles[i], s->icmap[j], s->ictlv + j);
278 // Connect the output control ports
279 for (j = 0; j < s->nb_outputcontrols; j++)
280 s->desc->connect_port(s->handles[i], s->ocmap[j], &s->octlv[j]);
282 if (s->desc->activate)
283 s->desc->activate(s->handles[i]);
286 av_log(ctx, AV_LOG_DEBUG, "handles: %d\n", s->nb_handles);
291 static int config_input(AVFilterLink *inlink)
293 AVFilterContext *ctx = inlink->dst;
295 return connect_ports(ctx, inlink);
298 static int config_output(AVFilterLink *outlink)
300 AVFilterContext *ctx = outlink->src;
303 if (ctx->nb_inputs) {
304 AVFilterLink *inlink = ctx->inputs[0];
306 outlink->format = inlink->format;
307 outlink->sample_rate = inlink->sample_rate;
308 if (ctx->nb_inputs == ctx->nb_outputs) {
309 outlink->channel_layout = inlink->channel_layout;
310 outlink->channels = inlink->channels;
315 LADSPAContext *s = ctx->priv;
317 outlink->sample_rate = s->sample_rate;
318 outlink->time_base = (AVRational){1, s->sample_rate};
320 ret = connect_ports(ctx, outlink);
326 static void count_ports(const LADSPA_Descriptor *desc,
327 unsigned long *nb_inputs, unsigned long *nb_outputs)
329 LADSPA_PortDescriptor pd;
332 for (i = 0; i < desc->PortCount; i++) {
333 pd = desc->PortDescriptors[i];
335 if (LADSPA_IS_PORT_AUDIO(pd)) {
336 if (LADSPA_IS_PORT_INPUT(pd)) {
338 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
345 static void *try_load(const char *dir, const char *soname)
347 char *path = av_asprintf("%s/%s.so", dir, soname);
351 ret = dlopen(path, RTLD_LOCAL|RTLD_NOW);
358 static int set_control(AVFilterContext *ctx, unsigned long port, LADSPA_Data value)
360 LADSPAContext *s = ctx->priv;
361 const char *label = s->desc->Label;
362 LADSPA_PortRangeHint *h = (LADSPA_PortRangeHint *)s->desc->PortRangeHints +
365 if (port >= s->nb_inputcontrols) {
366 av_log(ctx, AV_LOG_ERROR, "Control c%ld is out of range [0 - %lu].\n",
367 port, s->nb_inputcontrols);
368 return AVERROR(EINVAL);
371 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor) &&
372 value < h->LowerBound) {
373 av_log(ctx, AV_LOG_ERROR,
374 "%s: input control c%ld is below lower boundary of %0.4f.\n",
375 label, port, h->LowerBound);
376 return AVERROR(EINVAL);
379 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor) &&
380 value > h->UpperBound) {
381 av_log(ctx, AV_LOG_ERROR,
382 "%s: input control c%ld is above upper boundary of %0.4f.\n",
383 label, port, h->UpperBound);
384 return AVERROR(EINVAL);
387 s->ictlv[port] = value;
392 static av_cold int init(AVFilterContext *ctx)
394 LADSPAContext *s = ctx->priv;
395 LADSPA_Descriptor_Function descriptor_fn;
396 const LADSPA_Descriptor *desc;
397 LADSPA_PortDescriptor pd;
398 AVFilterPad pad = { NULL };
399 char *p, *arg, *saveptr = NULL;
400 unsigned long nb_ports;
404 av_log(ctx, AV_LOG_ERROR, "No plugin name provided\n");
405 return AVERROR(EINVAL);
408 if (s->dl_name[0] == '/' || s->dl_name[0] == '.') {
409 // argument is a path
410 s->dl_handle = dlopen(s->dl_name, RTLD_LOCAL|RTLD_NOW);
412 // argument is a shared object name
413 char *paths = av_strdup(getenv("LADSPA_PATH"));
414 const char *separator = ":";
418 while ((arg = av_strtok(p, separator, &saveptr)) && !s->dl_handle) {
419 s->dl_handle = try_load(arg, s->dl_name);
425 if (!s->dl_handle && (paths = av_asprintf("%s/.ladspa/lib", getenv("HOME")))) {
426 s->dl_handle = try_load(paths, s->dl_name);
431 s->dl_handle = try_load("/usr/local/lib/ladspa", s->dl_name);
434 s->dl_handle = try_load("/usr/lib/ladspa", s->dl_name);
437 av_log(ctx, AV_LOG_ERROR, "Failed to load '%s'\n", s->dl_name);
438 return AVERROR(EINVAL);
441 descriptor_fn = dlsym(s->dl_handle, "ladspa_descriptor");
442 if (!descriptor_fn) {
443 av_log(ctx, AV_LOG_ERROR, "Could not find ladspa_descriptor: %s\n", dlerror());
444 return AVERROR(EINVAL);
447 // Find the requested plugin, or list plugins
449 av_log(ctx, AV_LOG_INFO, "The '%s' library contains the following plugins:\n", s->dl_name);
450 av_log(ctx, AV_LOG_INFO, "I = Input Channels\n");
451 av_log(ctx, AV_LOG_INFO, "O = Output Channels\n");
452 av_log(ctx, AV_LOG_INFO, "I:O %-25s %s\n", "Plugin", "Description");
453 av_log(ctx, AV_LOG_INFO, "\n");
454 for (i = 0; desc = descriptor_fn(i); i++) {
455 unsigned long inputs = 0, outputs = 0;
457 count_ports(desc, &inputs, &outputs);
458 av_log(ctx, AV_LOG_INFO, "%lu:%lu %-25s %s\n", inputs, outputs, desc->Label,
459 (char *)av_x_if_null(desc->Name, "?"));
460 av_log(ctx, AV_LOG_VERBOSE, "Maker: %s\n",
461 (char *)av_x_if_null(desc->Maker, "?"));
462 av_log(ctx, AV_LOG_VERBOSE, "Copyright: %s\n",
463 (char *)av_x_if_null(desc->Copyright, "?"));
468 desc = descriptor_fn(i);
470 av_log(ctx, AV_LOG_ERROR, "Could not find plugin: %s\n", s->plugin);
471 return AVERROR(EINVAL);
474 if (desc->Label && !strcmp(desc->Label, s->plugin))
480 nb_ports = desc->PortCount;
482 s->ipmap = av_calloc(nb_ports, sizeof(*s->ipmap));
483 s->opmap = av_calloc(nb_ports, sizeof(*s->opmap));
484 s->icmap = av_calloc(nb_ports, sizeof(*s->icmap));
485 s->ocmap = av_calloc(nb_ports, sizeof(*s->ocmap));
486 s->ictlv = av_calloc(nb_ports, sizeof(*s->ictlv));
487 s->octlv = av_calloc(nb_ports, sizeof(*s->octlv));
488 s->ctl_needs_value = av_calloc(nb_ports, sizeof(*s->ctl_needs_value));
489 if (!s->ipmap || !s->opmap || !s->icmap ||
490 !s->ocmap || !s->ictlv || !s->octlv || !s->ctl_needs_value)
491 return AVERROR(ENOMEM);
493 for (i = 0; i < nb_ports; i++) {
494 pd = desc->PortDescriptors[i];
496 if (LADSPA_IS_PORT_AUDIO(pd)) {
497 if (LADSPA_IS_PORT_INPUT(pd)) {
498 s->ipmap[s->nb_inputs] = i;
500 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
501 s->opmap[s->nb_outputs] = i;
504 } else if (LADSPA_IS_PORT_CONTROL(pd)) {
505 if (LADSPA_IS_PORT_INPUT(pd)) {
506 s->icmap[s->nb_inputcontrols] = i;
508 if (LADSPA_IS_HINT_HAS_DEFAULT(desc->PortRangeHints[i].HintDescriptor))
509 set_default_ctl_value(s, s->nb_inputcontrols, s->icmap, s->ictlv);
511 s->ctl_needs_value[s->nb_inputcontrols] = 1;
513 s->nb_inputcontrols++;
514 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
515 s->ocmap[s->nb_outputcontrols] = i;
516 s->nb_outputcontrols++;
521 // List Control Ports if "help" is specified
522 if (s->options && !strcmp(s->options, "help")) {
523 if (!s->nb_inputcontrols) {
524 av_log(ctx, AV_LOG_INFO,
525 "The '%s' plugin does not have any input controls.\n",
528 av_log(ctx, AV_LOG_INFO,
529 "The '%s' plugin has the following input controls:\n",
531 for (i = 0; i < s->nb_inputcontrols; i++)
532 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->icmap, s->ictlv, 0);
537 // Parse control parameters
543 if (!(arg = av_strtok(p, "|", &saveptr)))
547 if (sscanf(arg, "c%d=%f", &i, &val) != 2) {
548 if (sscanf(arg, "%f", &val) != 1) {
549 av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
550 return AVERROR(EINVAL);
555 if ((ret = set_control(ctx, i, val)) < 0)
557 s->ctl_needs_value[i] = 0;
560 // Check if any controls are not set
561 for (i = 0; i < s->nb_inputcontrols; i++) {
562 if (s->ctl_needs_value[i]) {
563 av_log(ctx, AV_LOG_ERROR, "Control c%d must be set.\n", i);
564 print_ctl_info(ctx, AV_LOG_ERROR, s, i, s->icmap, s->ictlv, 0);
565 return AVERROR(EINVAL);
569 pad.type = AVMEDIA_TYPE_AUDIO;
572 pad.name = av_asprintf("in0:%s%lu", desc->Label, s->nb_inputs);
574 return AVERROR(ENOMEM);
576 pad.filter_frame = filter_frame;
577 pad.config_props = config_input;
578 if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) {
580 return AVERROR(ENOMEM);
584 av_log(ctx, AV_LOG_DEBUG, "ports: %lu\n", nb_ports);
585 av_log(ctx, AV_LOG_DEBUG, "inputs: %lu outputs: %lu\n",
586 s->nb_inputs, s->nb_outputs);
587 av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n",
588 s->nb_inputcontrols, s->nb_outputcontrols);
593 static int query_formats(AVFilterContext *ctx)
595 LADSPAContext *s = ctx->priv;
596 AVFilterFormats *formats;
597 AVFilterChannelLayouts *layouts;
598 static const enum AVSampleFormat sample_fmts[] = {
599 AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
601 formats = ff_make_format_list(sample_fmts);
603 return AVERROR(ENOMEM);
604 ff_set_common_formats(ctx, formats);
607 formats = ff_all_samplerates();
609 return AVERROR(ENOMEM);
611 ff_set_common_samplerates(ctx, formats);
613 int sample_rates[] = { s->sample_rate, -1 };
615 ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates));
618 if (s->nb_inputs == 1 && s->nb_outputs == 1) {
619 // We will instantiate multiple LADSPA_Handle, one over each channel
620 layouts = ff_all_channel_counts();
622 return AVERROR(ENOMEM);
624 ff_set_common_channel_layouts(ctx, layouts);
625 } else if (s->nb_inputs == 2 && s->nb_outputs == 2) {
627 ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO);
628 ff_set_common_channel_layouts(ctx, layouts);
630 AVFilterLink *outlink = ctx->outputs[0];
632 if (s->nb_inputs >= 1) {
633 AVFilterLink *inlink = ctx->inputs[0];
634 int64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
637 ff_add_channel_layout(&layouts, inlayout);
638 ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts);
641 ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
644 if (s->nb_outputs >= 1) {
645 int64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
648 ff_add_channel_layout(&layouts, outlayout);
649 ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
656 static av_cold void uninit(AVFilterContext *ctx)
658 LADSPAContext *s = ctx->priv;
661 for (i = 0; i < s->nb_handles; i++) {
662 if (s->desc->deactivate)
663 s->desc->deactivate(s->handles[i]);
664 if (s->desc->cleanup)
665 s->desc->cleanup(s->handles[i]);
669 dlclose(s->dl_handle);
677 av_freep(&s->handles);
678 av_freep(&s->ctl_needs_value);
681 av_freep(&ctx->input_pads[0].name);
684 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
685 char *res, int res_len, int flags)
690 if (sscanf(cmd, "c%ld", &port) + sscanf(args, "%f", &value) != 2)
691 return AVERROR(EINVAL);
693 return set_control(ctx, port, value);
696 static const AVFilterPad ladspa_outputs[] = {
699 .type = AVMEDIA_TYPE_AUDIO,
700 .config_props = config_output,
701 .request_frame = request_frame,
706 AVFilter ff_af_ladspa = {
708 .description = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."),
709 .priv_size = sizeof(LADSPAContext),
710 .priv_class = &ladspa_class,
713 .query_formats = query_formats,
714 .process_command = process_command,
716 .outputs = ladspa_outputs,
717 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,