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dolby: Implement DSPVolumeSynchronizer

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Some Xiaomi devices have a speaker that needs a framework to cooperate
with DSP to synchronize volume so that the DSP can limit bass when the
volume is high to prevent distortion.

Change-Id: I750803d94161e1e7482552d2a39566f42e82fc0a
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
This commit is contained in:
Alcatraz323 2024-12-12 21:07:07 +08:00 • committed by swiitchOFF
parent 65d7336949
commit 23662b74ac
9 changed files with 166 additions and 0 deletions
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39
DSPVolumeSynchronizer/Android.bp Normal file
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@ -0,0 +1,39 @@
//
// Copyright (C) 2024-2025 The LineageOS Project
//
// SPDX-License-Identifier: Apache-2.0
//
android_app {
name: "DSPVolumeSynchronizer",
certificate: "platform",
srcs: ["src/**/*.java"],
platform_apis: true,
privileged: true,
system_ext_specific: true,
static_libs: [
"androidx.core_core",
"SettingsLib",
],
required: [
"privapp-permissions-dspvolume",
"config-dspvolume",
],
}
prebuilt_etc {
name: "privapp-permissions-dspvolume",
relative_install_path: "permissions",
src: "privapp-permissions-dspvolume.xml",
system_ext_specific: true,
filename_from_src: true,
}
prebuilt_etc {
name: "config-dspvolume",
relative_install_path: "sysconfig",
src: "config-dspvolume.xml",
system_ext_specific: true,
filename_from_src: true,
}

30
DSPVolumeSynchronizer/AndroidManifest.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.lineageos.dspvolume.xiaomi"
android:versionCode="1"
android:versionName="1.0"
android:sharedUserId="android.uid.system">
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:label="@string/app_name"
android:persistent="true"
android:defaultToDeviceProtectedStorage="true"
android:directBootAware="true">
<receiver
android:name=".BootReceiver"
android:exported="true"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter android:priority="999">
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
<service
android:name=".VolumeListenerService" />
</application>
</manifest>

5
DSPVolumeSynchronizer/config-dspvolume.xml Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<config>
<allow-in-power-save package="org.lineageos.dspvolume.xiaomi" />
<hidden-api-whitelisted-app package="org.lineageos.dspvolume.xiaomi" />
</config>

9
DSPVolumeSynchronizer/privapp-permissions-dspvolume.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<permissions>
<privapp-permissions package="org.lineageos.dspvolume.xiaomi">
<permission name="android.permission.INTERACT_ACROSS_USERS" />
<permission name="android.permission.INTERACT_ACROSS_USERS_FULL" />
<permission name="android.permission.MODIFY_AUDIO_SETTINGS" />
<permission name="android.permission.RECEIVE_BOOT_COMPLETED" />
</privapp-permissions>
</permissions>

5
DSPVolumeSynchronizer/res/values/strings.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- App Name -->
<string name="app_name">DSP Volume Synchronizer</string>
</resources>

16
DSPVolumeSynchronizer/src/org/lineageos/dspvolume/xiaomi/BootReceiver.java Normal file
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package org.lineageos.dspvolume.xiaomi;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class BootReceiver extends BroadcastReceiver {
@Override
public void onReceive(final Context context, Intent intent) {
if (context == null) {
return;
}
context.startService(new Intent(context, VolumeListenerService.class));
}
}

28
DSPVolumeSynchronizer/src/org/lineageos/dspvolume/xiaomi/VolumeListenerReceiver.java Normal file
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package org.lineageos.dspvolume.xiaomi;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.util.Log;
import android.os.Bundle;
public class VolumeListenerReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (context == null) {
return;
}
if(intent.getIntExtra("android.media.EXTRA_VOLUME_STREAM_TYPE", 0) == AudioManager.STREAM_MUSIC) {
AudioManager audioManager = context.getSystemService(AudioManager.class);
int current = intent.getIntExtra(
"android.media.EXTRA_VOLUME_STREAM_VALUE",
0
);
audioManager.setParameters("volume_change=" + current + ";flags=8");
}
}
}

30
DSPVolumeSynchronizer/src/org/lineageos/dspvolume/xiaomi/VolumeListenerService.java Normal file
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package org.lineageos.dspvolume.xiaomi;
import android.app.Service;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.os.IBinder;
import androidx.annotation.Nullable;
public class VolumeListenerService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("android.media.VOLUME_CHANGED_ACTION");
registerReceiver(new VolumeListenerReceiver(), intentFilter);
AudioManager audioManager = getSystemService(AudioManager.class);
int current = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
audioManager.setParameters("volume_change=" + current + ";flags=8");
return super.onStartCommand(intent, flags, startId);
}
}

4
dolby.mk
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@ -85,6 +85,10 @@ PRODUCT_VENDOR_PROPERTIES += \
PRODUCT_PACKAGES += \
RemovePackagesDolby
# DSP Volume Synchronizer
PRODUCT_PACKAGES += \
DSPVolumeSynchronizer
# XiaomiDolby
PRODUCT_PACKAGES += \
XiaomiDolby \