- virtual void onStream(CPulseAudioClient* pClient, size_t length);
- virtual void onInterrupt(CAudioSessionHandler* pHandler, int id, mm_sound_focus_type_e focus_type, mm_sound_focus_state_e state, const char *reason_for_change, const char *additional_info);
- virtual void onSignal(CAudioSessionHandler* pHandler, mm_sound_signal_name_t signal, int value);