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role-ducking: Add support for ducking group

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Now, trigger_roles, ducking_roles and volume can be divided into several groups by slash.
That means each group can be affected by its own volume policy.

If we need to apply ducking volume level differently that is triggered from
each trigger role(s), this feature would be useful for this purpose.

For example, let's assume that tts should take music and video's volume down to 40%
whereas voice_recognition should take those and tts's volume down to 20%.
In this case, the configuration can be written as below.
  trigger_roles=tts/voice_recognition ducking_roles=music,video/music,video,tts volume=40%/20%

If one of ducking role is affected by more than two trigger roles simultaneously,
volume of the ducking role will be applied by method of multiplication.
And it works in the same way as before without any slash.

Signed-off-by: Sangchul Lee <sc11.lee@samsung.com>
This commit is contained in:
Sangchul Lee 2016-04-13 10:48:44 +09:00 • committed by Tanu Kaskinen
parent 7aac90236b
commit b08f38385d
2 changed files with 212 additions and 87 deletions
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6
src/modules/module-role-ducking.c
View file

@ -32,10 +32,10 @@ PA_MODULE_DESCRIPTION("Apply a ducking effect based on streams roles");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(true);
PA_MODULE_USAGE(
"trigger_roles=<Comma separated list of roles which will trigger a ducking> "
"ducking_roles=<Comma separated list of roles which will be ducked> "
"trigger_roles=<Comma(and slash) separated list of roles which will trigger a ducking. Slash can divide the roles into groups>"
"ducking_roles=<Comma(and slash) separated list of roles which will be ducked. Slash can divide the roles into groups>"
"global=<Should we operate globally or only inside the same device?>"
"volume=<Volume for the attenuated streams. Default: -20dB"
"volume=<Volume for the attenuated streams. Default: -20dB. If trigger_roles and ducking_roles are separated by slash, use slash for dividing volume group>"
);
static const char* const valid_modargs[] = {