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ffmpeg/libavfilter/af_ladspa.c
Paul B Mahol 191ee4aefb avfilter/af_ladspa: set output channel layout for passthrough case 
For cases when plugin does not return any samples we just return
input samples. Previously channel layout for outlink was not set.
Set it explicitly instead.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
2013-09-27 12:51:08 +00:00

704 lines
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/*
* Copyright (c) 2013 Paul B Mahol
* Copyright (c) 2011 Mina Nagy Zaki
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* LADSPA wrapper
*/
#include <dlfcn.h>
#include <ladspa.h>
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"
typedef struct LADSPAContext {
const AVClass *class;
char *dl_name;
char *plugin;
char *options;
void *dl_handle;
unsigned long nb_inputs;
unsigned long *ipmap; /* map input number to port number */
unsigned long nb_inputcontrols;
unsigned long *icmap; /* map input control number to port number */
LADSPA_Data *ictlv; /* input controls values */
unsigned long nb_outputs;
unsigned long *opmap; /* map output number to port number */
unsigned long nb_outputcontrols;
unsigned long *ocmap; /* map output control number to port number */
LADSPA_Data *octlv; /* output controls values */
const LADSPA_Descriptor *desc;
int *ctl_needs_value;
int nb_handles;
LADSPA_Handle *handles;
int sample_rate;
int nb_samples;
int64_t pts;
int64_t duration;
} LADSPAContext;
#define OFFSET(x) offsetof(LADSPAContext, x)
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption ladspa_options[] = {
{ "file", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "f", "set library name or full path", OFFSET(dl_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "plugin", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "p", "set plugin name", OFFSET(plugin), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "controls", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "c", "set plugin options", OFFSET(options), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "sample_rate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
{ "s", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100}, 1, INT32_MAX, FLAGS },
{ "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
{ "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64=1024}, 1, INT_MAX, FLAGS },
{ "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
{ "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=-1}, -1, INT64_MAX, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(ladspa);
static void print_ctl_info(AVFilterContext *ctx, int level,
LADSPAContext *s, int ctl, unsigned long *map,
LADSPA_Data *values, int print)
{
const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
av_log(ctx, level, "c%i: %s [", ctl, s->desc->PortNames[map[ctl]]);
if (LADSPA_IS_HINT_TOGGLED(h->HintDescriptor)) {
av_log(ctx, level, "toggled (1 or 0)");
if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
av_log(ctx, level, " (default %i)", (int)values[ctl]);
} else {
if (LADSPA_IS_HINT_INTEGER(h->HintDescriptor)) {
av_log(ctx, level, "<int>");
if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
av_log(ctx, level, ", min: %i", (int)h->LowerBound);
if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
av_log(ctx, level, ", max: %i", (int)h->UpperBound);
if (print)
av_log(ctx, level, " (value %d)", (int)values[ctl]);
else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
av_log(ctx, level, " (default %d)", (int)values[ctl]);
} else {
av_log(ctx, level, "<float>");
if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor))
av_log(ctx, level, ", min: %f", h->LowerBound);
if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor))
av_log(ctx, level, ", max: %f", h->UpperBound);
if (print)
av_log(ctx, level, " (value %f)", values[ctl]);
else if (LADSPA_IS_HINT_HAS_DEFAULT(h->HintDescriptor))
av_log(ctx, level, " (default %f)", values[ctl]);
}
if (LADSPA_IS_HINT_SAMPLE_RATE(h->HintDescriptor))
av_log(ctx, level, ", multiple of sample rate");
if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
av_log(ctx, level, ", logarithmic scale");
}
av_log(ctx, level, "]\n");
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
LADSPAContext *s = ctx->priv;
AVFrame *out;
int i, h;
if (!s->nb_outputs ||
(av_frame_is_writable(in) && s->nb_inputs == s->nb_outputs &&
!(s->desc->Properties & LADSPA_PROPERTY_INPLACE_BROKEN))) {
out = in;
} else {
out = ff_get_audio_buffer(ctx->outputs[0], in->nb_samples);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
}
for (h = 0; h < s->nb_handles; h++) {
for (i = 0; i < s->nb_inputs; i++) {
s->desc->connect_port(s->handles[h], s->ipmap[i],
(LADSPA_Data*)in->extended_data[i]);
}
for (i = 0; i < s->nb_outputs; i++) {
s->desc->connect_port(s->handles[h], s->opmap[i],
(LADSPA_Data*)out->extended_data[i]);
}
s->desc->run(s->handles[h], in->nb_samples);
}
for (i = 0; i < s->nb_outputcontrols; i++)
print_ctl_info(ctx, AV_LOG_VERBOSE, s, i, s->ocmap, s->octlv, 1);
if (out != in)
av_frame_free(&in);
return ff_filter_frame(ctx->outputs[0], out);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LADSPAContext *s = ctx->priv;
AVFrame *out;
int64_t t;
int i;
if (ctx->nb_inputs)
return ff_request_frame(ctx->inputs[0]);
t = av_rescale(s->pts, AV_TIME_BASE, s->sample_rate);
if (s->duration >= 0 && t >= s->duration)
return AVERROR_EOF;
out = ff_get_audio_buffer(outlink, s->nb_samples);
if (!out)
return AVERROR(ENOMEM);
for (i = 0; i < s->nb_outputs; i++)
s->desc->connect_port(s->handles[0], s->opmap[i],
(LADSPA_Data*)out->extended_data[i]);
s->desc->run(s->handles[0], s->nb_samples);
for (i = 0; i < s->nb_outputcontrols; i++)
print_ctl_info(ctx, AV_LOG_INFO, s, i, s->ocmap, s->octlv, 1);
out->sample_rate = s->sample_rate;
out->pts = s->pts;
s->pts += s->nb_samples;
return ff_filter_frame(outlink, out);
}
static void set_default_ctl_value(LADSPAContext *s, int ctl,
unsigned long *map, LADSPA_Data *values)
{
const LADSPA_PortRangeHint *h = s->desc->PortRangeHints + map[ctl];
const LADSPA_Data lower = h->LowerBound;
const LADSPA_Data upper = h->UpperBound;
if (LADSPA_IS_HINT_DEFAULT_MINIMUM(h->HintDescriptor)) {
values[ctl] = lower;
} else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(h->HintDescriptor)) {
values[ctl] = upper;
} else if (LADSPA_IS_HINT_DEFAULT_0(h->HintDescriptor)) {
values[ctl] = 0.0;
} else if (LADSPA_IS_HINT_DEFAULT_1(h->HintDescriptor)) {
values[ctl] = 1.0;
} else if (LADSPA_IS_HINT_DEFAULT_100(h->HintDescriptor)) {
values[ctl] = 100.0;
} else if (LADSPA_IS_HINT_DEFAULT_440(h->HintDescriptor)) {
values[ctl] = 440.0;
} else if (LADSPA_IS_HINT_DEFAULT_LOW(h->HintDescriptor)) {
if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
values[ctl] = exp(log(lower) * 0.75 + log(upper) * 0.25);
else
values[ctl] = lower * 0.75 + upper * 0.25;
} else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(h->HintDescriptor)) {
if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
values[ctl] = exp(log(lower) * 0.5 + log(upper) * 0.5);
else
values[ctl] = lower * 0.5 + upper * 0.5;
} else if (LADSPA_IS_HINT_DEFAULT_HIGH(h->HintDescriptor)) {
if (LADSPA_IS_HINT_LOGARITHMIC(h->HintDescriptor))
values[ctl] = exp(log(lower) * 0.25 + log(upper) * 0.75);
else
values[ctl] = lower * 0.25 + upper * 0.75;
}
}
static int connect_ports(AVFilterContext *ctx, AVFilterLink *link)
{
LADSPAContext *s = ctx->priv;
int i, j;
s->nb_handles = s->nb_inputs == 1 && s->nb_outputs == 1 ? link->channels : 1;
s->handles = av_calloc(s->nb_handles, sizeof(*s->handles));
if (!s->handles)
return AVERROR(ENOMEM);
for (i = 0; i < s->nb_handles; i++) {
s->handles[i] = s->desc->instantiate(s->desc, link->sample_rate);
if (!s->handles[i]) {
av_log(ctx, AV_LOG_ERROR, "Could not instantiate plugin.\n");
return AVERROR_EXTERNAL;
}
// Connect the input control ports
for (j = 0; j < s->nb_inputcontrols; j++)
s->desc->connect_port(s->handles[i], s->icmap[j], s->ictlv + j);
// Connect the output control ports
for (j = 0; j < s->nb_outputcontrols; j++)
s->desc->connect_port(s->handles[i], s->ocmap[j], &s->octlv[j]);
if (s->desc->activate)
s->desc->activate(s->handles[i]);
}
av_log(ctx, AV_LOG_DEBUG, "handles: %d\n", s->nb_handles);
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
return connect_ports(ctx, inlink);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
int ret;
if (ctx->nb_inputs) {
AVFilterLink *inlink = ctx->inputs[0];
outlink->format = inlink->format;
outlink->sample_rate = inlink->sample_rate;
ret = 0;
} else {
LADSPAContext *s = ctx->priv;
outlink->sample_rate = s->sample_rate;
outlink->time_base = (AVRational){1, s->sample_rate};
ret = connect_ports(ctx, outlink);
}
return ret;
}
static void count_ports(const LADSPA_Descriptor *desc,
unsigned long *nb_inputs, unsigned long *nb_outputs)
{
LADSPA_PortDescriptor pd;
int i;
for (i = 0; i < desc->PortCount; i++) {
pd = desc->PortDescriptors[i];
if (LADSPA_IS_PORT_AUDIO(pd)) {
if (LADSPA_IS_PORT_INPUT(pd)) {
(*nb_inputs)++;
} else if (LADSPA_IS_PORT_OUTPUT(pd)) {
(*nb_outputs)++;
}
}
}
}
static void *try_load(const char *dir, const char *soname)
{
char *path = av_asprintf("%s/%s.so", dir, soname);
void *ret = NULL;
if (path) {
ret = dlopen(path, RTLD_LOCAL|RTLD_NOW);
av_free(path);
}
return ret;
}
static int set_control(AVFilterContext *ctx, unsigned long port, LADSPA_Data value)
{
LADSPAContext *s = ctx->priv;
const char *label = s->desc->Label;
LADSPA_PortRangeHint *h = (LADSPA_PortRangeHint *)s->desc->PortRangeHints +
s->icmap[port];
if (port >= s->nb_inputcontrols) {
av_log(ctx, AV_LOG_ERROR, "Control c%ld is out of range [0 - %lu].\n",
port, s->nb_inputcontrols);
return AVERROR(EINVAL);
}
if (LADSPA_IS_HINT_BOUNDED_BELOW(h->HintDescriptor) &&
value < h->LowerBound) {
av_log(ctx, AV_LOG_ERROR,
"%s: input control c%ld is below lower boundary of %0.4f.\n",
label, port, h->LowerBound);
return AVERROR(EINVAL);
}
if (LADSPA_IS_HINT_BOUNDED_ABOVE(h->HintDescriptor) &&
value > h->UpperBound) {
av_log(ctx, AV_LOG_ERROR,
"%s: input control c%ld is above upper boundary of %0.4f.\n",
label, port, h->UpperBound);
return AVERROR(EINVAL);
}
s->ictlv[port] = value;
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
LADSPAContext *s = ctx->priv;
LADSPA_Descriptor_Function descriptor_fn;
const LADSPA_Descriptor *desc;
LADSPA_PortDescriptor pd;
AVFilterPad pad = { NULL };
char *p, *arg, *saveptr = NULL;
unsigned long nb_ports;
int i;
if (!s->dl_name) {
av_log(ctx, AV_LOG_ERROR, "No plugin name provided\n");
return AVERROR(EINVAL);
}
if (s->dl_name[0] == '/' || s->dl_name[0] == '.') {
// argument is a path
s->dl_handle = dlopen(s->dl_name, RTLD_LOCAL|RTLD_NOW);
} else {
// argument is a shared object name
char *paths = av_strdup(getenv("LADSPA_PATH"));
const char *separator = ":";
if (paths) {
p = paths;
while ((arg = av_strtok(p, separator, &saveptr)) && !s->dl_handle) {
s->dl_handle = try_load(arg, s->dl_name);
p = NULL;
}
}
av_free(paths);
if (!s->dl_handle && (paths = av_asprintf("%s/.ladspa/lib", getenv("HOME")))) {
s->dl_handle = try_load(paths, s->dl_name);
av_free(paths);
}
if (!s->dl_handle)
s->dl_handle = try_load("/usr/local/lib/ladspa", s->dl_name);
if (!s->dl_handle)
s->dl_handle = try_load("/usr/lib/ladspa", s->dl_name);
}
if (!s->dl_handle) {
av_log(ctx, AV_LOG_ERROR, "Failed to load '%s'\n", s->dl_name);
return AVERROR(EINVAL);
}
descriptor_fn = dlsym(s->dl_handle, "ladspa_descriptor");
if (!descriptor_fn) {
av_log(ctx, AV_LOG_ERROR, "Could not find ladspa_descriptor: %s\n", dlerror());
return AVERROR(EINVAL);
}
// Find the requested plugin, or list plugins
if (!s->plugin) {
av_log(ctx, AV_LOG_INFO, "The '%s' library contains the following plugins:\n", s->dl_name);
av_log(ctx, AV_LOG_INFO, "I = Input Channels\n");
av_log(ctx, AV_LOG_INFO, "O = Output Channels\n");
av_log(ctx, AV_LOG_INFO, "I:O %-25s %s\n", "Plugin", "Description");
av_log(ctx, AV_LOG_INFO, "\n");
for (i = 0; desc = descriptor_fn(i); i++) {
unsigned long inputs = 0, outputs = 0;
count_ports(desc, &inputs, &outputs);
av_log(ctx, AV_LOG_INFO, "%lu:%lu %-25s %s\n", inputs, outputs, desc->Label,
av_x_if_null(desc->Name, "?"));
av_log(ctx, AV_LOG_VERBOSE, "Maker: %s\n", av_x_if_null(desc->Maker, "?"));
av_log(ctx, AV_LOG_VERBOSE, "Copyright: %s\n", av_x_if_null(desc->Copyright, "?"));
}
return AVERROR_EXIT;
} else {
for (i = 0;; i++) {
desc = descriptor_fn(i);
if (!desc) {
av_log(ctx, AV_LOG_ERROR, "Could not find plugin: %s\n", s->plugin);
return AVERROR(EINVAL);
}
if (desc->Label && !strcmp(desc->Label, s->plugin))
break;
}
}
s->desc = desc;
nb_ports = desc->PortCount;
s->ipmap = av_calloc(nb_ports, sizeof(*s->ipmap));
s->opmap = av_calloc(nb_ports, sizeof(*s->opmap));
s->icmap = av_calloc(nb_ports, sizeof(*s->icmap));
s->ocmap = av_calloc(nb_ports, sizeof(*s->ocmap));
s->ictlv = av_calloc(nb_ports, sizeof(*s->ictlv));
s->octlv = av_calloc(nb_ports, sizeof(*s->octlv));
s->ctl_needs_value = av_calloc(nb_ports, sizeof(*s->ctl_needs_value));
if (!s->ipmap || !s->opmap || !s->icmap ||
!s->ocmap || !s->ictlv || !s->octlv || !s->ctl_needs_value)
return AVERROR(ENOMEM);
for (i = 0; i < nb_ports; i++) {
pd = desc->PortDescriptors[i];
if (LADSPA_IS_PORT_AUDIO(pd)) {
if (LADSPA_IS_PORT_INPUT(pd)) {
s->ipmap[s->nb_inputs] = i;
s->nb_inputs++;
} else if (LADSPA_IS_PORT_OUTPUT(pd)) {
s->opmap[s->nb_outputs] = i;
s->nb_outputs++;
}
} else if (LADSPA_IS_PORT_CONTROL(pd)) {
if (LADSPA_IS_PORT_INPUT(pd)) {
s->icmap[s->nb_inputcontrols] = i;
if (LADSPA_IS_HINT_HAS_DEFAULT(desc->PortRangeHints[i].HintDescriptor))
set_default_ctl_value(s, s->nb_inputcontrols, s->icmap, s->ictlv);
else
s->ctl_needs_value[s->nb_inputcontrols] = 1;
s->nb_inputcontrols++;
} else if (LADSPA_IS_PORT_OUTPUT(pd)) {
s->ocmap[s->nb_outputcontrols] = i;
s->nb_outputcontrols++;
}
}
}
// List Control Ports if "help" is specified
if (s->options && !strcmp(s->options, "help")) {
if (!s->nb_inputcontrols) {
av_log(ctx, AV_LOG_INFO,
"The '%s' plugin does not have any input controls.\n",
desc->Label);
} else {
av_log(ctx, AV_LOG_INFO,
"The '%s' plugin has the following input controls:\n",
desc->Label);
for (i = 0; i < s->nb_inputcontrols; i++)
print_ctl_info(ctx, AV_LOG_INFO, s, i, s->icmap, s->ictlv, 0);
}
return AVERROR_EXIT;
}
// Parse control parameters
p = s->options;
while (s->options) {
LADSPA_Data val;
int ret;
if (!(arg = av_strtok(p, "|", &saveptr)))
break;
p = NULL;
if (sscanf(arg, "c%d=%f", &i, &val) != 2) {
av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
return AVERROR(EINVAL);
}
if ((ret = set_control(ctx, i, val)) < 0)
return ret;
s->ctl_needs_value[i] = 0;
}
// Check if any controls are not set
for (i = 0; i < s->nb_inputcontrols; i++) {
if (s->ctl_needs_value[i]) {
av_log(ctx, AV_LOG_ERROR, "Control c%d must be set.\n", i);
print_ctl_info(ctx, AV_LOG_ERROR, s, i, s->icmap, s->ictlv, 0);
return AVERROR(EINVAL);
}
}
pad.type = AVMEDIA_TYPE_AUDIO;
if (s->nb_inputs) {
pad.name = av_asprintf("in0:%s%lu", desc->Label, s->nb_inputs);
if (!pad.name)
return AVERROR(ENOMEM);
pad.filter_frame = filter_frame;
pad.config_props = config_input;
if (ff_insert_inpad(ctx, ctx->nb_inputs, &pad) < 0) {
av_freep(&pad.name);
return AVERROR(ENOMEM);
}
}
av_log(ctx, AV_LOG_DEBUG, "ports: %lu\n", nb_ports);
av_log(ctx, AV_LOG_DEBUG, "inputs: %lu outputs: %lu\n",
s->nb_inputs, s->nb_outputs);
av_log(ctx, AV_LOG_DEBUG, "input controls: %lu output controls: %lu\n",
s->nb_inputcontrols, s->nb_outputcontrols);
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
LADSPAContext *s = ctx->priv;
AVFilterFormats *formats;
AVFilterChannelLayouts *layouts;
static const enum AVSampleFormat sample_fmts[] = {
AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
formats = ff_make_format_list(sample_fmts);
if (!formats)
return AVERROR(ENOMEM);
ff_set_common_formats(ctx, formats);
if (s->nb_inputs) {
formats = ff_all_samplerates();
if (!formats)
return AVERROR(ENOMEM);
ff_set_common_samplerates(ctx, formats);
} else {
int sample_rates[] = { s->sample_rate, -1 };
ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates));
}
if (s->nb_inputs == 1 && s->nb_outputs == 1) {
// We will instantiate multiple LADSPA_Handle, one over each channel
layouts = ff_all_channel_layouts();
if (!layouts)
return AVERROR(ENOMEM);
ff_set_common_channel_layouts(ctx, layouts);
} else {
AVFilterLink *outlink = ctx->outputs[0];
if (s->nb_inputs >= 1) {
AVFilterLink *inlink = ctx->inputs[0];
int64_t inlayout = FF_COUNT2LAYOUT(s->nb_inputs);
layouts = NULL;
ff_add_channel_layout(&layouts, inlayout);
ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts);
if (!s->nb_outputs)
ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
}
if (s->nb_outputs >= 1) {
int64_t outlayout = FF_COUNT2LAYOUT(s->nb_outputs);
layouts = NULL;
ff_add_channel_layout(&layouts, outlayout);
ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts);
}
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
LADSPAContext *s = ctx->priv;
int i;
for (i = 0; i < s->nb_handles; i++) {
if (s->desc->deactivate)
s->desc->deactivate(s->handles[i]);
if (s->desc->cleanup)
s->desc->cleanup(s->handles[i]);
}
if (s->dl_handle)
dlclose(s->dl_handle);
av_freep(&s->ipmap);
av_freep(&s->opmap);
av_freep(&s->icmap);
av_freep(&s->ocmap);
av_freep(&s->ictlv);
av_freep(&s->octlv);
av_freep(&s->handles);
av_freep(&s->ctl_needs_value);
if (ctx->nb_inputs)
av_freep(&ctx->input_pads[0].name);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
LADSPA_Data value;
unsigned long port;
if (sscanf(cmd, "c%ld", &port) + sscanf(args, "%f", &value) != 2)
return AVERROR(EINVAL);
return set_control(ctx, port, value);
}
static const AVFilterPad ladspa_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter avfilter_af_ladspa = {
.name = "ladspa",
.description = NULL_IF_CONFIG_SMALL("Apply LADSPA effect."),
.priv_size = sizeof(LADSPAContext),
.priv_class = &ladspa_class,
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.process_command = process_command,
.inputs = 0,
.outputs = ladspa_outputs,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};
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