if (oldState == AudioSystem::MODE_IN_CALL && newDevice == 0) {
newDevice = hwOutputDesc->device();
}
+
+ // when changing from ring tone to in call mode, mute the ringing tone
+ // immediately and delay the route change to avoid sending the ring tone
+ // tail into the earpiece or headset.
+ int delayMs = 0;
+ if (state == AudioSystem::MODE_IN_CALL && oldState == AudioSystem::MODE_RINGTONE) {
+ // delay the device change command by twice the output latency to have some margin
+ // and be sure that audio buffers not yet affected by the mute are out when
+ // we actually apply the route change
+ delayMs = hwOutputDesc->mLatency*2;
+ setStreamMute(AudioSystem::RING, true, mHardwareOutput);
+ }
+
// change routing is necessary
- setOutputDevice(mHardwareOutput, newDevice, force);
+ setOutputDevice(mHardwareOutput, newDevice, force, delayMs);
// if entering in call state, handle special case of active streams
// pertaining to sonification strategy see handleIncallSonification()
if (state == AudioSystem::MODE_IN_CALL) {
LOGV("setPhoneState() in call state management: new state is %d", state);
+ // unmute the ringing tone after a sufficient delay if it was muted before
+ // setting output device above
+ if (oldState == AudioSystem::MODE_RINGTONE) {
+ setStreamMute(AudioSystem::RING, false, mHardwareOutput, MUTE_TIME_MS);
+ }
for (int stream = 0; stream < AudioSystem::NUM_STREAM_TYPES; stream++) {
handleIncallSonification(stream, true, true);
}
return INVALID_OPERATION;
}
- // mute media during 2 seconds to avoid outputing sound on hardware output while music stream
+ // mute media strategy to avoid outputting sound on hardware output while music stream
// is switched from A2DP output and before music is paused by music application
setStrategyMute(STRATEGY_MEDIA, true, mHardwareOutput);
- setStrategyMute(STRATEGY_MEDIA, false, mHardwareOutput, 2000);
+ setStrategyMute(STRATEGY_MEDIA, false, mHardwareOutput, MUTE_TIME_MS);
if (!a2dpUsedForSonification()) {
// unmute music on A2DP output if a notification or ringtone is playing