diff options
Diffstat (limited to 'services/core/java/com/android/server/audio/AudioService.java')
| -rw-r--r-- | services/core/java/com/android/server/audio/AudioService.java | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java index b3b328a..ef2ff62 100644 --- a/services/core/java/com/android/server/audio/AudioService.java +++ b/services/core/java/com/android/server/audio/AudioService.java @@ -4003,8 +4003,29 @@ public class AudioService extends IAudioService.Stub { int index; 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) { + /* 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; + } + } else if ((device & mFullVolumeDevices) != 0) { index = (mIndexMax + 5)/10; } else { index = (getIndex(device) + 5)/10; |