b17e0cd5dd
We used to change the PulseAudio sink input volume. Doing so had some potential unwanted side effects depending on the PulseAudio server configuration. When flat volumes were enabled, it would affect the global system volume. It could also affect the volume of other streams having the same audio role. Volumes in Qt Multimedia are supposed to be relative to the application volume and should not affect anything else than the object on which it was changed. To guarantee that, PulseAudio volume APIs are not used anymore. Instead, software-based volume attenuation is applied on the audio samples before being passed to PulseAudio. Applies to QSoundEffect, QAudioOutput and QAudioInput. Task-number: QTBUG-40823 Task-number: QTBUG-49461 Change-Id: I690716976bda8fe666969ca2cbdf6d8d0b419733 Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>