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filter-apply: Look for filter parameters also in device properties

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Some filters take parameters that effectively describe the hardware
they're being applied to (like echo-cancel allowing to specify the
mic array parameters for better noise filtering). This allows system
integrators to set default parameters for such modules per-device,
which will get used when the stream doesn't specify their own.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/400>
This commit is contained in:
Sebastian Krzyszkowiak 2020-10-29 02:11:22 +01:00 • committed by PulseAudio Marge Bot
parent c0779b28b8
commit 4552fe15b3
1 changed files with 8 additions and 3 deletions
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11
src/modules/module-filter-apply.c
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@ -146,15 +146,20 @@ static const char* get_filter_name(pa_object *o, bool is_sink_input) {
static const char* get_filter_parameters(pa_object *o, const char *want, bool is_sink_input) { static const char* get_filter_parameters(pa_object *o, const char *want, bool is_sink_input) {
const char *parameters; const char *parameters;
char *prop_parameters; char *prop_parameters;
pa_proplist *pl; pa_proplist *pl, *device_pl;
if (is_sink_input) if (is_sink_input) {
pl = PA_SINK_INPUT(o)->proplist; pl = PA_SINK_INPUT(o)->proplist;
else device_pl = PA_SINK_INPUT(o)->sink->proplist;
} else {
pl = PA_SOURCE_OUTPUT(o)->proplist; pl = PA_SOURCE_OUTPUT(o)->proplist;
device_pl = PA_SOURCE_OUTPUT(o)->source->proplist;
}
prop_parameters = pa_sprintf_malloc(PA_PROP_FILTER_APPLY_PARAMETERS, want); prop_parameters = pa_sprintf_malloc(PA_PROP_FILTER_APPLY_PARAMETERS, want);
parameters = pa_proplist_gets(pl, prop_parameters); parameters = pa_proplist_gets(pl, prop_parameters);
if (!parameters)
parameters = pa_proplist_gets(device_pl, prop_parameters);
pa_xfree(prop_parameters); pa_xfree(prop_parameters);
return parameters; return parameters;