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Code Issues Releases Activity

avfilter/af_lv2: add commands support

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This commit is contained in:
Paul B Mahol 2022-03-10 11:52:18 +01:00
parent 34715fe4a2
commit 5cd8eb2aef
2 changed files with 25 additions and 0 deletions
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4
doc/filters.texi
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@ -5433,6 +5433,10 @@ lv2=p=http\\\\://www.openavproductions.com/artyfx#bitta:c=crush=0.3
@end example
@end itemize
@subsection Commands
This filter supports all options that are exported by plugin as commands.
@section mcompand
Multiband Compress or expand the audio's dynamic range.

21
libavfilter/af_lv2.c
View File

@ -538,6 +538,26 @@ static int query_formats(AVFilterContext *ctx)
return 0;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
LV2Context *s = ctx->priv;
const LilvPort *port;
LilvNode *sym;
int index;
sym = lilv_new_string(s->world, cmd);
port = lilv_plugin_get_port_by_symbol(s->plugin, sym);
lilv_node_free(sym);
if (!port) {
av_log(s, AV_LOG_WARNING, "Unknown option: <%s>\n", cmd);
} else {
index = lilv_port_get_index(s->plugin, port);
s->controls[index] = atof(args);
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
LV2Context *s = ctx->priv;
@ -578,6 +598,7 @@ const AVFilter ff_af_lv2 = {
.priv_class = &lv2_class,
.init = init,
.uninit = uninit,
.process_command = process_command,
.inputs = 0,
FILTER_OUTPUTS(lv2_outputs),
FILTER_QUERY_FUNC(query_formats),