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/avassert.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/channel_layout.h"
32 #include "libavutil/opt.h"
37 typedef struct LADSPAContext {
44 unsigned long nb_inputs;
45 unsigned long *ipmap; /* map input number to port number */
47 unsigned long nb_inputcontrols;
48 unsigned long *icmap; /* map input control number to port number */
49 LADSPA_Data *ictlv; /* input controls values */
51 unsigned long nb_outputs;
52 unsigned long *opmap; /* map output number to port number */
54 unsigned long nb_outputcontrols;
55 unsigned long *ocmap; /* map output control number to port number */
56 LADSPA_Data *octlv; /* output controls values */
58 const LADSPA_Descriptor *desc;
61 LADSPA_Handle *handles;
72 #define OFFSET(x) offsetof(LADSPAContext, x)
73 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
74 static const AVOption ladspa_options[] = {
75 { "file", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
76 { "f", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
77 { "plugin", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
78 { "p", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
79 { "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
80 { "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
81 { "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
82 { "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
83 { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
84 { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
85 { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
86 { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
87 { "latency", "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
88 { "l", "enable latency compensation", OFFSET(latency), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
92 AVFILTER_DEFINE_CLASS(ladspa);
94 static int find_latency(AVFilterContext *ctx, LADSPAContext *s)
98 for (int ctl = 0; ctl < s->nb_outputcontrols; ctl++) {
99 if (av_strcasecmp("latency", s->desc->PortNames[s->ocmap[ctl]]))
102 latency = lrintf(s->octlv[ctl]);
109 static void print_ctl_info(AVFilterContext *ctx, int level,
110 LADSPAContext *s, int ctl, unsigned long *map,
111 LADSPA_Data *values, int print)
113 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
115 av_log(ctx, level, "c%i: %s [", ctl, s->desc->PortNames[map[ctl]]);
117 if (LADSPA_IS_HINT_TOGGLED(h->HintDescriptor)) {
118 av_log(ctx, level, "toggled (1 or 0)");
120 if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
121 av_log(ctx, level, " (default %i)", (int)values[ctl]);
123 if (LADSPA_IS_HINT_INTEGER(h->HintDescriptor)) {
124 av_log(ctx, level, "<int>");
126 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
127 av_log(ctx, level, ", min: %i", (int)h->LowerBound);
129 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
130 av_log(ctx, level, ", max: %i", (int)h->UpperBound);
133 av_log(ctx, level, " (value %d)", (int)values[ctl]);
134 else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
135 av_log(ctx, level, " (default %d)", (int)values[ctl]);
137 av_log(ctx, level, "<float>");
139 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
140 av_log(ctx, level, ", min: %f", h->LowerBound);
142 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
143 av_log(ctx, level, ", max: %f", h->UpperBound);
146 av_log(ctx, level, " (value %f)", values[ctl]);
147 else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
148 av_log(ctx, level, " (default %f)", values[ctl]);
151 if (LADSPA_IS_HINT_SAMPLE_RATE(h->HintDescriptor))
152 av_log(ctx, level, ", multiple of sample rate");
154 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
155 av_log(ctx, level, ", logarithmic scale");
158 av_log(ctx, level, "]\n");
161 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
163 AVFilterContext *ctx = inlink->dst;
164 LADSPAContext *s = ctx->priv;
166 int i, h, p, new_out_samples;
168 av_assert0(in->channels == (s->nb_inputs * s->nb_handles));
170 if (!s->nb_outputs ||
171 (av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs &&
172 s->in_trim == 0 && s->out_pad == 0 &&
173 !(s->desc->Properties & LADSPA_PROPERTY_INPLACE_BROKEN))) {
176 out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
179 return AVERROR(ENOMEM);
181 av_frame_copy_props(out, in);
184 av_assert0(!s->nb_outputs || out->channels == (s->nb_outputs * s->nb_handles));
186 for (h = 0; h < s->nb_handles; h++) {
187 for (i = 0; i < s->nb_inputs; i++) {
188 p = s->nb_handles > 1 ? h : i;
189 s->desc->connect_port(s->handles[h], s->ipmap[i],
190 (LADSPA_Data*)in->extended_data[p]);
193 for (i = 0; i < s->nb_outputs; i++) {
194 p = s->nb_handles > 1 ? h : i;
195 s->desc->connect_port(s->handles[h], s->opmap[i],
196 (LADSPA_Data*)out->extended_data[p]);
199 s->desc->run(s->handles[h], in->nb_samples);
201 s->in_trim = s->out_pad = find_latency(ctx, s);
205 for (i = 0; i < s->nb_outputcontrols; i++)
206 print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1);
211 new_out_samples = out->nb_samples;
212 if (s->in_trim > 0) {
213 int trim = FFMIN(new_out_samples, s->in_trim);
215 new_out_samples -= trim;
219 if (new_out_samples <= 0) {
222 } else if (new_out_samples < out->nb_samples) {
223 int offset = out->nb_samples - new_out_samples;
224 for (int ch = 0; ch < out->channels; ch++)
225 memmove(out->extended_data[ch], out->extended_data[ch] + sizeof(float) * offset,
226 sizeof(float) * new_out_samples);
227 out->nb_samples = new_out_samples;
230 return ff_filter_frame(ctx->outputs[0], out);
233 static int request_frame(AVFilterLink *outlink)
235 AVFilterContext *ctx = outlink->src;
236 LADSPAContext *s = ctx->priv;
241 if (ctx->nb_inputs) {
242 int ret = ff_request_frame(ctx->inputs[0]);
244 if (ret == AVERROR_EOF && s->out_pad > 0) {
245 AVFrame *frame = ff_get_audio_buffer(outlink, FFMIN(2048, s->out_pad));
247 return AVERROR(ENOMEM);
249 s->out_pad -= frame->nb_samples;
250 return filter_frame(ctx->inputs[0], frame);
255 t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
256 if (s->duration >= 0 && t >= s->duration)
259 out = ff_get_audio_buffer(outlink, s->nb_samples);
261 return AVERROR(ENOMEM);
263 for (i = 0; i < s->nb_outputs; i++)
264 s->desc->connect_port(s->handles[0], s->opmap[i],
265 (LADSPA_Data*)out->extended_data[i]);
267 s->desc->run(s->handles[0], s->nb_samples);
269 for (i = 0; i < s->nb_outputcontrols; i++)
270 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1);
272 out->sample_rate = s->sample_rate;
274 s->pts += s->nb_samples;
276 return ff_filter_frame(outlink, out);
279 static void set_default_ctl_value(LADSPAContext *s, int ctl,
280 unsigned long *map, LADSPA_Data *values)
282 const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
283 const LADSPA_Data lower = h->LowerBound;
284 const LADSPA_Data upper = h->UpperBound;
286 if (LADSPA_IS_HINT_DEFAULT_MINIMUM(h->HintDescriptor)) {
288 } else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(h->HintDescriptor)) {
290 } else if (LADSPA_IS_HINT_DEFAULT_0(h->HintDescriptor)) {
292 } else if (LADSPA_IS_HINT_DEFAULT_1(h->HintDescriptor)) {
294 } else if (LADSPA_IS_HINT_DEFAULT_100(h->HintDescriptor)) {
296 } else if (LADSPA_IS_HINT_DEFAULT_440(h->HintDescriptor)) {
298 } else if (LADSPA_IS_HINT_DEFAULT_LOW(h->HintDescriptor)) {
299 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
300 values[ctl] = exp(log(lower) * 0.75 + log(upper) * 0.25);
302 values[ctl] = lower * 0.75 + upper * 0.25;
303 } else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(h->HintDescriptor)) {
304 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
305 values[ctl] = exp(log(lower) * 0.5 + log(upper) * 0.5);
307 values[ctl] = lower * 0.5 + upper * 0.5;
308 } else if (LADSPA_IS_HINT_DEFAULT_HIGH(h->HintDescriptor)) {
309 if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
310 values[ctl] = exp(log(lower) * 0.25 + log(upper) * 0.75);
312 values[ctl] = lower * 0.25 + upper * 0.75;
316 static int connect_ports(AVFilterContext *ctx, AVFilterLink *link)
318 LADSPAContext *s = ctx->priv;
321 s->nb_handles = s->nb_inputs == 1 && s->nb_outputs == 1 ? link->channels : 1;
322 s->handles = av_calloc(s->nb_handles, sizeof(*s->handles));
324 return AVERROR(ENOMEM);
326 for (i = 0; i < s->nb_handles; i++) {
327 s->handles[i] = s->desc->instantiate(s->desc, link->sample_rate);
328 if (!s->handles[i]) {
329 av_log(ctx, AV_LOG_ERROR, "Could not instantiate plugin.\n");
330 return AVERROR_EXTERNAL;
333 // Connect the input control ports
334 for (j = 0; j < s->nb_inputcontrols; j++)
335 s->desc->connect_port(s->handles[i], s->icmap[j], s->ictlv + j);
337 // Connect the output control ports
338 for (j = 0; j < s->nb_outputcontrols; j++)
339 s->desc->connect_port(s->handles[i], s->ocmap[j], &s->octlv[j]);
341 if (s->desc->activate)
342 s->desc->activate(s->handles[i]);
345 av_log(ctx, AV_LOG_DEBUG, "handles: %d\n", s->nb_handles);
350 static int config_input(AVFilterLink *inlink)
352 AVFilterContext *ctx = inlink->dst;
354 return connect_ports(ctx, inlink);
357 static int config_output(AVFilterLink *outlink)
359 AVFilterContext *ctx = outlink->src;
360 LADSPAContext *s = ctx->priv;
363 if (ctx->nb_inputs) {
364 AVFilterLink *inlink = ctx->inputs[0];
366 outlink->format = inlink->format;
367 outlink->sample_rate = inlink->sample_rate;
368 if (s->nb_inputs == s->nb_outputs) {
369 outlink->channel_layout = inlink->channel_layout;
370 outlink->channels = inlink->channels;
375 outlink->sample_rate = s->sample_rate;
376 outlink->time_base = (AVRational){1, s->sample_rate};
378 ret = connect_ports(ctx, outlink);
384 static void count_ports(const LADSPA_Descriptor *desc,
385 unsigned long *nb_inputs, unsigned long *nb_outputs)
387 LADSPA_PortDescriptor pd;
390 for (i = 0; i < desc->PortCount; i++) {
391 pd = desc->PortDescriptors[i];
393 if (LADSPA_IS_PORT_AUDIO(pd)) {
394 if (LADSPA_IS_PORT_INPUT(pd)) {
396 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
403 static void *try_load(const char *dir, const char *soname)
405 char *path = av_asprintf("%s/%s.so", dir, soname);
409 ret = dlopen(path, RTLD_LOCAL|RTLD_NOW);
416 static int set_control(AVFilterContext *ctx, unsigned long port, LADSPA_Data value)
418 LADSPAContext *s = ctx->priv;
419 const char *label = s->desc->Label;
420 LADSPA_PortRangeHint *h = (LADSPA_PortRangeHint *)s->desc->PortRangeHints +
423 if (port >= s->nb_inputcontrols) {
424 av_log(ctx, AV_LOG_ERROR, "Control c%ld is out of range [0 - %lu].\n",
425 port, s->nb_inputcontrols);
426 return AVERROR(EINVAL);
429 if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor) &&
430 value < h->LowerBound) {
431 av_log(ctx, AV_LOG_ERROR,
432 "%s: input control c%ld is below lower boundary of %0.4f.\n",
433 label, port, h->LowerBound);
434 return AVERROR(EINVAL);
437 if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor) &&
438 value > h->UpperBound) {
439 av_log(ctx, AV_LOG_ERROR,
440 "%s: input control c%ld is above upper boundary of %0.4f.\n",
441 label, port, h->UpperBound);
442 return AVERROR(EINVAL);
445 s->ictlv[port] = value;
450 static av_cold int init(AVFilterContext *ctx)
452 LADSPAContext *s = ctx->priv;
453 LADSPA_Descriptor_Function descriptor_fn;
454 const LADSPA_Descriptor *desc;
455 LADSPA_PortDescriptor pd;
456 AVFilterPad pad = { NULL };
457 char *p, *arg, *saveptr = NULL;
458 unsigned long nb_ports;
462 av_log(ctx, AV_LOG_ERROR, "No plugin name provided\n");
463 return AVERROR(EINVAL);
466 if (s->dl_name[0] == '/' || s->dl_name[0] == '.') {
467 // argument is a path
468 s->dl_handle = dlopen(s->dl_name, RTLD_LOCAL|RTLD_NOW);
470 // argument is a shared object name
471 char *paths = av_strdup(getenv("LADSPA_PATH"));
472 const char *home_path = getenv("HOME");
473 const char *separator = ":";
477 while ((arg = av_strtok(p, separator, &saveptr)) && !s->dl_handle) {
478 s->dl_handle = try_load(arg, s->dl_name);
484 if (!s->dl_handle && home_path && (paths = av_asprintf("%s/.ladspa", home_path))) {
485 s->dl_handle = try_load(paths, s->dl_name);
489 if (!s->dl_handle && home_path && (paths = av_asprintf("%s/.ladspa/lib", home_path))) {
490 s->dl_handle = try_load(paths, s->dl_name);
495 s->dl_handle = try_load("/usr/local/lib/ladspa", s->dl_name);
498 s->dl_handle = try_load("/usr/lib/ladspa", s->dl_name);
501 av_log(ctx, AV_LOG_ERROR, "Failed to load '%s'\n", s->dl_name);
502 return AVERROR(EINVAL);
505 descriptor_fn = dlsym(s->dl_handle, "ladspa_descriptor");
506 if (!descriptor_fn) {
507 av_log(ctx, AV_LOG_ERROR, "Could not find ladspa_descriptor: %s\n", dlerror());
508 return AVERROR(EINVAL);
511 // Find the requested plugin, or list plugins
513 av_log(ctx, AV_LOG_INFO, "The '%s' library contains the following plugins:\n", s->dl_name);
514 av_log(ctx, AV_LOG_INFO, "I = Input Channels\n");
515 av_log(ctx, AV_LOG_INFO, "O = Output Channels\n");
516 av_log(ctx, AV_LOG_INFO, "I:O %-25s %s\n", "Plugin", "Description");
517 av_log(ctx, AV_LOG_INFO, "\n");
518 for (i = 0; desc = descriptor_fn(i); i++) {
519 unsigned long inputs = 0, outputs = 0;
521 count_ports(desc, &inputs, &outputs);
522 av_log(ctx, AV_LOG_INFO, "%lu:%lu %-25s %s\n", inputs, outputs, desc->Label,
523 (char *)av_x_if_null(desc->Name, "?"));
524 av_log(ctx, AV_LOG_VERBOSE, "Maker: %s\n",
525 (char *)av_x_if_null(desc->Maker, "?"));
526 av_log(ctx, AV_LOG_VERBOSE, "Copyright: %s\n",
527 (char *)av_x_if_null(desc->Copyright, "?"));
532 desc = descriptor_fn(i);
534 av_log(ctx, AV_LOG_ERROR, "Could not find plugin: %s\n", s->plugin);
535 return AVERROR(EINVAL);
538 if (desc->Label && !strcmp(desc->Label, s->plugin))
544 nb_ports = desc->PortCount;
546 s->ipmap = av_calloc(nb_ports, sizeof(*s->ipmap));
547 s->opmap = av_calloc(nb_ports, sizeof(*s->opmap));
548 s->icmap = av_calloc(nb_ports, sizeof(*s->icmap));
549 s->ocmap = av_calloc(nb_ports, sizeof(*s->ocmap));
550 s->ictlv = av_calloc(nb_ports, sizeof(*s->ictlv));
551 s->octlv = av_calloc(nb_ports, sizeof(*s->octlv));
552 s->ctl_needs_value = av_calloc(nb_ports, sizeof(*s->ctl_needs_value));
553 if (!s->ipmap || !s->opmap || !s->icmap ||
554 !s->ocmap || !s->ictlv || !s->octlv || !s->ctl_needs_value)
555 return AVERROR(ENOMEM);
557 for (i = 0; i < nb_ports; i++) {
558 pd = desc->PortDescriptors[i];
560 if (LADSPA_IS_PORT_AUDIO(pd)) {
561 if (LADSPA_IS_PORT_INPUT(pd)) {
562 s->ipmap[s->nb_inputs] = i;
564 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
565 s->opmap[s->nb_outputs] = i;
568 } else if (LADSPA_IS_PORT_CONTROL(pd)) {
569 if (LADSPA_IS_PORT_INPUT(pd)) {
570 s->icmap[s->nb_inputcontrols] = i;
572 if (LADSPA_IS_HINT_HAS_DEFAULT(desc->PortRangeHints[i].HintDescriptor))
573 set_default_ctl_value(s, s->nb_inputcontrols, s->icmap, s->ictlv);
575 s->ctl_needs_value[s->nb_inputcontrols] = 1;
577 s->nb_inputcontrols++;
578 } else if (LADSPA_IS_PORT_OUTPUT(pd)) {
579 s->ocmap[s->nb_outputcontrols] = i;
580 s->nb_outputcontrols++;
585 // List Control Ports if "help" is specified
586 if (s->options && !strcmp(s->options, "help")) {
587 if (!s->nb_inputcontrols) {
588 av_log(ctx, AV_LOG_INFO,
589 "The '%s' plugin does not have any input controls.\n",
592 av_log(ctx, AV_LOG_INFO,
593 "The '%s' plugin has the following input controls:\n",
595 for (i = 0; i < s->nb_inputcontrols; i++)
596 print_ctl_info(ctx, AV_LOG_INFO, s, i, s->icmap, s->ictlv, 0);
601 // Parse control parameters
607 if (!(arg = av_strtok(p, " |", &saveptr)))
611 if (av_sscanf(arg, "c%d=%f", &i, &val) != 2) {
612 if (av_sscanf(arg, "%f", &val) != 1) {
613 av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
614 return AVERROR(EINVAL);
619 if ((ret = set_control(ctx, i, val)) < 0)
621 s->ctl_needs_value[i] = 0;
624 // Check if any controls are not set
625 for (i = 0; i < s->nb_inputcontrols; i++) {
626 if (s->ctl_needs_value[i]) {
627 av_log(ctx, AV_LOG_ERROR, "Control c%d must be set.\n", i);
628 print_ctl_info(ctx, AV_LOG_ERROR, s, i, s->icmap, s->ictlv, 0);
629 return AVERROR(EINVAL);
633 pad.type = AVMEDIA_TYPE_AUDIO;
636 pad.name = av_asprintf("in0:%s%lu", desc->Label, s->nb_inputs);
638 return AVERROR(ENOMEM);
640 pad.filter_frame = filter_frame;
641 pad.config_props = config_input;
642 if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) {
644 return AVERROR(ENOMEM);
648 av_log(ctx, AV_LOG_DEBUG, "ports: %lu\n", nb_ports);
649 av_log(ctx, AV_LOG_DEBUG, "inputs: %lu outputs: %lu\n",
650 s->nb_inputs, s->nb_outputs);
651 av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n",
652 s->nb_inputcontrols, s->nb_outputcontrols);
657 static int query_formats(AVFilterContext *ctx)
659 LADSPAContext *s = ctx->priv;
660 AVFilterFormats *formats;
661 AVFilterChannelLayouts *layouts;
662 static const enum AVSampleFormat sample_fmts[] = {
663 AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
666 formats = ff_make_format_list(sample_fmts);
668 return AVERROR(ENOMEM);
669 ret = ff_set_common_formats(ctx, formats);
674 formats = ff_all_samplerates();
676 return AVERROR(ENOMEM);
678 ret = ff_set_common_samplerates(ctx, formats);
682 int sample_rates[] = { s->sample_rate, -1 };
684 ret = ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates));
689 if (s->nb_inputs == 1 && s->nb_outputs == 1) {
690 // We will instantiate multiple LADSPA_Handle, one over each channel
691 layouts = ff_all_channel_counts();
693 return AVERROR(ENOMEM);
695 ret = ff_set_common_channel_layouts(ctx, layouts);
698 } else if (s->nb_inputs == 2 && s->nb_outputs == 2) {
700 ret = ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO);
703 ret = ff_set_common_channel_layouts(ctx, layouts);
707 AVFilterLink *outlink = ctx->outputs[0];
709 if (s->nb_inputs >= 1) {
710 AVFilterLink *inlink = ctx->inputs[0];
711 uint64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
714 ret = ff_add_channel_layout(&layouts, inlayout);
717 ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts);
721 if (!s->nb_outputs) {
722 ret = ff_channel_layouts_ref(layouts, &outlink->incfg.channel_layouts);
728 if (s->nb_outputs >= 1) {
729 uint64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
732 ret = ff_add_channel_layout(&layouts, outlayout);
735 ret = ff_channel_layouts_ref(layouts, &outlink->incfg.channel_layouts);
744 static av_cold void uninit(AVFilterContext *ctx)
746 LADSPAContext *s = ctx->priv;
749 for (i = 0; i < s->nb_handles; i++) {
750 if (s->desc->deactivate)
751 s->desc->deactivate(s->handles[i]);
752 if (s->desc->cleanup)
753 s->desc->cleanup(s->handles[i]);
757 dlclose(s->dl_handle);
765 av_freep(&s->handles);
766 av_freep(&s->ctl_needs_value);
769 av_freep(&ctx->input_pads[0].name);
772 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
773 char *res, int res_len, int flags)
778 if (av_sscanf(cmd, "c%ld", &port) + av_sscanf(args, "%f", &value) != 2)
779 return AVERROR(EINVAL);
781 return set_control(ctx, port, value);
784 static const AVFilterPad ladspa_outputs[] = {
787 .type = AVMEDIA_TYPE_AUDIO,
788 .config_props = config_output,
789 .request_frame = request_frame,
794 const AVFilter ff_af_ladspa = {
796 .description = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."),
797 .priv_size = sizeof(LADSPAContext),
798 .priv_class = &ladspa_class,
801 .query_formats = query_formats,
802 .process_command = process_command,
804 .outputs = ladspa_outputs,
805 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,