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Merge "Bluetooth: Fine tune audio gain for Absolute Volume case" into nyc-dev

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TreeHugger Robot
2016-04-26 17:43:20 +00:00
committed by Android (Google) Code Review
parent 34510eb293 39fb5670a8
commit 9444231550
1 changed files with 32 additions and 24 deletions
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56
services/core/java/com/android/server/audio/AudioService.java
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@@ -3940,33 +3940,40 @@ public class AudioService extends IAudioService.Stub {
}
}
private int getAbsoluteVolumeIndex(int index) {
/* Special handling for Bluetooth Absolute Volume scenario
* If we send full audio gain, some accessories are too loud even at its lowest
* volume. We are not able to enumerate all such accessories, so here is the
* workaround from phone side.
* Pre-scale volume at lowest volume steps 1 2 and 3.
* For volume step 0, set audio gain to 0 as some accessories won't mute on their end.
*/
if (index == 0) {
// 0% for volume 0
index = 0;
} else if (index == 1) {
// 50% for volume 1
index = (int)(mIndexMax * 0.5) /10;
} else if (index == 2) {
// 70% for volume 2
index = (int)(mIndexMax * 0.70) /10;
} else if (index == 3) {
// 85% for volume 3
index = (int)(mIndexMax * 0.85) /10;
} else {
// otherwise, full gain
index = (mIndexMax + 5)/10;
}
return index;
}
// must be called while synchronized VolumeStreamState.class
public void applyDeviceVolume_syncVSS(int device) {
int index;
if (mIsMuted) {
index = 0;
} else if ((device & AudioSystem.DEVICE_OUT_ALL_A2DP) != 0 && mAvrcpAbsVolSupported) {
/* Special handling for Bluetooth Absolute Volume scenario
* If we send full audio gain, some accessories are too loud even at its lowest
* volume. We are not able to enumerate all such accessories, so here is the
* workaround from phone side.
* For the lowest volume steps 1 and 2, restrict audio gain to 50% and 75%.
* For volume step 0, set audio gain to 0 as some accessories won't mute on their end.
*/
int i = (getIndex(device) + 5)/10;
if (i == 0) {
// 0% for volume 0
index = 0;
} else if (i == 1) {
// 50% for volume 1
index = (int)(mIndexMax * 0.5) /10;
} else if (i == 2) {
// 75% for volume 2
index = (int)(mIndexMax * 0.75) /10;
} else {
// otherwise, full gain
index = (mIndexMax + 5)/10;
}
index = getAbsoluteVolumeIndex((getIndex(device) + 5)/10);
} else if ((device & mFullVolumeDevices) != 0) {
index = (mIndexMax + 5)/10;
} else {
@@ -3984,9 +3991,10 @@ public class AudioService extends IAudioService.Stub {
if (device != AudioSystem.DEVICE_OUT_DEFAULT) {
if (mIsMuted) {
index = 0;
} else if (((device & AudioSystem.DEVICE_OUT_ALL_A2DP) != 0 &&
mAvrcpAbsVolSupported)
|| ((device & mFullVolumeDevices) != 0)) {
} else if ((device & AudioSystem.DEVICE_OUT_ALL_A2DP) != 0 &&
mAvrcpAbsVolSupported) {
index = getAbsoluteVolumeIndex((getIndex(device) + 5)/10);
} else if ((device & mFullVolumeDevices) != 0) {
index = (mIndexMax + 5)/10;
} else {
index = (mIndexMap.valueAt(i) + 5)/10;