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Commit f0fecb19 authored by Tomoharu Kasahara's avatar Tomoharu Kasahara Committed by Jean-Michel Trivi
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Make pre-scale for absolute volume configurable 

Audio gain for lower volume steps are restricted for
Bluetooth Absolute Volume scenario, but it's better
not to use the fixed value.
This CL makes it possible to configure the value of
pre-scale.

Bug: 114220617
Test: manual - gain is restricted as per the configuration

Change-Id: I1fd0c77476386ba9518e1819d5ea2c7b0c344a40
parent 99ae1039

core/res/res/values/config.xml

+9 −0
Original line number Diff line number Diff line
@@ -3541,4 +3541,13 @@ 


    <!-- Brand value for attestation of misprovisioned device. -->

    <string name="config_misprovisionedBrandValue" translatable="false"></string>



    <!-- Pre-scale volume at volume step 1 for Absolute Volume -->

    <fraction name="config_prescaleAbsoluteVolume_index1">50%</fraction>



    <!-- Pre-scale volume at volume step 2 for Absolute Volume -->

    <fraction name="config_prescaleAbsoluteVolume_index2">70%</fraction>



    <!-- Pre-scale volume at volume step 3 for Absolute Volume -->

    <fraction name="config_prescaleAbsoluteVolume_index3">85%</fraction>

</resources>

core/res/res/values/symbols.xml

+5 −0
Original line number Diff line number Diff line
@@ -3470,4 +3470,9 @@ 
  <java-symbol type="integer" name="db_wal_truncate_size" />

  <java-symbol type="integer" name="config_wakeUpDelayDoze" />

  <java-symbol type="string" name="config_dozeWakeScreenSensorType" />



  <!-- For Bluetooth AbsoluteVolume -->

  <java-symbol type="fraction" name="config_prescaleAbsoluteVolume_index1" />

  <java-symbol type="fraction" name="config_prescaleAbsoluteVolume_index2" />

  <java-symbol type="fraction" name="config_prescaleAbsoluteVolume_index3" />

</resources>

services/core/java/com/android/server/audio/AudioService.java

+28 −10
Original line number Diff line number Diff line
@@ -627,6 +627,13 @@ public class AudioService extends IAudioService.Stub 
    // If absolute volume is supported in AVRCP device

    private boolean mAvrcpAbsVolSupported = false;



    // Pre-scale for Bluetooth Absolute Volume

    private float[] mPrescaleAbsoluteVolume = new float[] {

        0.5f,    // Pre-scale for index 1

        0.7f,    // Pre-scale for index 2

        0.85f,   // Pre-scale for index 3

    };



    private static Long mLastDeviceConnectMsgTime = new Long(0);



    private NotificationManager mNm;
@@ -878,6 +885,23 @@ public class AudioService extends IAudioService.Stub 
        mUserManagerInternal.addUserRestrictionsListener(mUserRestrictionsListener);



        mRecordMonitor.initMonitor();



        final float[] preScale = new float[3];

        preScale[0] = mContext.getResources().getFraction(

                com.android.internal.R.fraction.config_prescaleAbsoluteVolume_index1,

                1, 1);

        preScale[1] = mContext.getResources().getFraction(

                com.android.internal.R.fraction.config_prescaleAbsoluteVolume_index2,

                1, 1);

        preScale[2] = mContext.getResources().getFraction(

                com.android.internal.R.fraction.config_prescaleAbsoluteVolume_index3,

                1, 1);

        for (int i = 0; i < preScale.length; i++) {

            if (0.0f <= preScale[i] && preScale[i] <= 1.0f) {

                mPrescaleAbsoluteVolume[i] = preScale[i];

            }

        }



    }



    public void systemReady() {
@@ -4926,15 +4950,9 @@ public class AudioService extends IAudioService.Stub 
            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 if (index > 0 && index <= 3) {

                // Pre-scale for volume steps 1 2 and 3

                index = (int) (mIndexMax * mPrescaleAbsoluteVolume[index - 1]) / 10;

            } else {

                // otherwise, full gain

                index = (mIndexMax + 5) / 10;