Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

AudioService: reduce EU volume warning thresdhold for USB headsets

Browse Source 
am: 630f37a4ad

Change-Id: Ib9a3ebae93073018fc4bda0d2dc36c5fc1fdac92
This commit is contained in:
Eric Laurent
2017-09-20 16:54:43 +00:00
committed by android-build-merger
parent 93fcfbc8cb 630f37a4ad
commit 0c4a9d2714
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
services/core/java/com/android/server/audio/AudioService.java
View File

@@ -6039,12 +6039,12 @@ public class AudioService extends IAudioService.Stub
private int mSafeMediaVolumeIndex;
// mSafeUsbMediaVolumeIndex is used for USB Headsets and is the music volume UI index
// corresponding to a gain of -30 dBFS in audio flinger mixer.
// We remove -15 dBs from the theoretical -15dB to account for the EQ boost when bands are set
// to max gain.
// We remove -22 dBs from the theoretical -15dB to account for the EQ + bass boost
// amplification when both effects are on with all band gains at maximum.
// This level corresponds to a loudness of 85 dB SPL for the warning to be displayed when
// the headset is compliant to EN 60950 with a max loudness of 100dB SPL.
private int mSafeUsbMediaVolumeIndex;
private static final float SAFE_VOLUME_GAIN_DBFS = -30.0f;
private static final float SAFE_VOLUME_GAIN_DBFS = -37.0f;
// mSafeMediaVolumeDevices lists the devices for which safe media volume is enforced,
private final int mSafeMediaVolumeDevices = AudioSystem.DEVICE_OUT_WIRED_HEADSET |
AudioSystem.DEVICE_OUT_WIRED_HEADPHONE |