gts3l-common: audio: Implement audio rotation handler app×service

Originally this patch is made for Galaxy Tab S5e But I cherry-picked
this to our Galaxy Tab S3 device comes with editing the parameter key,
values.

Thanks LuK1337 for this amazing patch.

Change-Id: Ibc053edf1fa7e797f6457dfead416b177da57ab6

AudioRotationMonitor/Android.mk

@@ -0,0 +1,17 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := AudioRotationMonitor
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVATE_PLATFORM_APIS := true
+
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+
+include $(BUILD_PACKAGE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))

AudioRotationMonitor/AndroidManifest.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.lineageos.audiorotationmonitor"
+    android:versionCode="1"
+    android:versionName="1.0"
+    android:sharedUserId="android.uid.system">
+
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+
+    <uses-sdk
+        android:minSdkVersion="21"
+        android:targetSdkVersion="21" />
+
+    <application
+        android:label="AudioRotationMonitor"
+        android:persistent="true">
+
+        <receiver android:name="org.lineageos.audiorotationmonitor.BootCompletedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </receiver>
+
+        <service android:name="org.lineageos.audiorotationmonitor.DisplayListenerService"
+                 android:permission="AudioRotationMonitorService">
+        </service>
+
+    </application>
+</manifest>

AudioRotationMonitor/proguard.flags

@@ -0,0 +1,3 @@
+-keep class org.lineageos.audiorotationmonitor.* {
+  *;
+}

AudioRotationMonitor/service/Android.mk

@@ -0,0 +1,14 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := set-audio-rotation
+LOCAL_MODULE_TAGS := optional
+LOCAL_INIT_RC := set-audio-rotation.rc
+LOCAL_SRC_FILES := \
+    set-audio-rotation.cpp
+LOCAL_SHARED_LIBRARIES := \
+    libbase \
+    libtinyalsa
+
+include $(BUILD_EXECUTABLE)

AudioRotationMonitor/service/set-audio-rotation.cpp

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2019 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define LOG_TAG "set-audio-rotation"
+
+#include <android-base/logging.h>
+#include <tinyalsa/asoundlib.h>
+
+constexpr int SLOT_POSITIONS_0[] = { 0, 1, 0, 1 };
+constexpr int SLOT_POSITIONS_90[] = { 1, 1, 0, 0 };
+constexpr int SLOT_POSITIONS_180[] = { 1, 0, 1, 0 };
+constexpr int SLOT_POSITIONS_270[] = { 0, 0, 1, 1 };
+
+void setMixerValueByName(mixer *mixer, const char *name, int value) {
+    const auto ctl = mixer_get_ctl_by_name(mixer, name);
+
+    if (ctl == nullptr) {
+        LOG(ERROR) << "Failed to find mixer ctl for " << name;
+        return;
+    }
+
+    if (mixer_ctl_set_value(ctl, 0, value) < 0) {
+        LOG(ERROR) << "Failed to set ctl value " << value << " for " << name;
+        return;
+    }
+}
+
+void setSlotPositions(const int *values) {
+    const auto mixer = mixer_open(0);
+
+    if (mixer == nullptr) {
+        LOG(ERROR) << "Failed to open mixer";
+        return;
+    }
+
+    setMixerValueByName(mixer, "ExtSPK LL TDM_ADC_SEL", values[0]);
+    setMixerValueByName(mixer, "ExtSPK LR TDM_ADC_SEL", values[1]);
+    setMixerValueByName(mixer, "ExtSPK UL TDM_ADC_SEL", values[2]);
+    setMixerValueByName(mixer, "ExtSPK UR TDM_ADC_SEL", values[3]);
+
+    setMixerValueByName(mixer, "ExtSPK LL TDM_DAC_SEL", values[0]);
+    setMixerValueByName(mixer, "ExtSPK LR TDM_DAC_SEL", values[1]);
+    setMixerValueByName(mixer, "ExtSPK UL TDM_DAC_SEL", values[2]);
+    setMixerValueByName(mixer, "ExtSPK UR TDM_DAC_SEL", values[3]);
+
+    mixer_close(mixer);
+};
+
+int main(int argc, char **argv) {
+    if (argc != 2) {
+        return -1;
+    }
+
+    if (strcmp(argv[1], "0") == 0) {
+        setSlotPositions(SLOT_POSITIONS_0);
+    } else if (strcmp(argv[1], "1") == 0) {
+        setSlotPositions(SLOT_POSITIONS_90);
+    } else if (strcmp(argv[1], "2") == 0) {
+        setSlotPositions(SLOT_POSITIONS_180);
+    } else if (strcmp(argv[1], "3") == 0) {
+        setSlotPositions(SLOT_POSITIONS_270);
+    } else {
+        return -1;
+    }
+
+    return 0;
+}

AudioRotationMonitor/service/set-audio-rotation.rc

@@ -0,0 +1,2 @@
+on property:sys.audio.rotation=*
+    exec - root audio -- /system/bin/set-audio-rotation ${sys.audio.rotation}

AudioRotationMonitor/src/org/lineageos/audiorotationmonitor/BootCompletedReceiver.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2019 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.lineageos.audiorotationmonitor;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+
+public class BootCompletedReceiver extends BroadcastReceiver {
+    private static final String TAG = "AudioRotationMonitor";
+
+    @Override
+    public void onReceive(final Context context, Intent intent) {
+        Log.d(TAG, "Starting");
+        context.startService(new Intent(context, DisplayListenerService.class));
+    }
+}

AudioRotationMonitor/src/org/lineageos/audiorotationmonitor/DisplayListener.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2019 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.lineageos.audiorotationmonitor;
+
+import android.content.Context;
+import android.hardware.display.DisplayManager;
+import android.os.Handler;
+import android.os.SystemProperties;
+import android.util.Log;
+import android.view.Surface;
+import android.view.WindowManager;
+
+public class DisplayListener implements DisplayManager.DisplayListener {
+    private static final boolean DEBUG = true;
+    private static final String TAG = "DisplayListener";
+
+    private static final String AUDIO_ROTATION_PROP = "sys.audio.rotation";
+
+    private Context mContext;
+    private Handler mHandler;
+
+    private DisplayManager mDisplayManager;
+    private WindowManager mWindowManager;
+
+    private final Object mRotationLock = new Object();
+    private int mDeviceRotation = Surface.ROTATION_0;
+
+    public DisplayListener(Context context) {
+        mContext = context;
+        mHandler = new Handler();
+
+        mDisplayManager = mContext.getSystemService(DisplayManager.class);
+        mWindowManager = mContext.getSystemService(WindowManager.class);
+    }
+
+    @Override
+    public void onDisplayAdded(int displayId) {
+        if (DEBUG) Log.d(TAG, "onDisplayAdded");
+    }
+
+    @Override
+    public void onDisplayRemoved(int displayId) {
+        if (DEBUG) Log.d(TAG, "onDisplayRemoved");
+    }
+
+    @Override
+    public void onDisplayChanged(int displayId) {
+        if (DEBUG) Log.d(TAG, "onDisplayChanged");
+        updateOrientation();
+    }
+
+    private void updateOrientation() {
+        // Even though we're responding to device orientation events,
+        // use display rotation so audio stays in sync with video/dialogs
+        int newRotation = mWindowManager.getDefaultDisplay().getRotation();
+
+        synchronized (mRotationLock) {
+            if (newRotation != mDeviceRotation) {
+                mDeviceRotation = newRotation;
+                SystemProperties.set(AUDIO_ROTATION_PROP, String.valueOf(mDeviceRotation));
+            }
+        }
+    }
+
+    public void enable() {
+        if (DEBUG) Log.d(TAG, "Enabling");
+        mDisplayManager.registerDisplayListener(this, mHandler);
+        updateOrientation();
+    }
+
+    public void disable() {
+        if (DEBUG) Log.d(TAG, "Disabling");
+        mDisplayManager.unregisterDisplayListener(this);
+    }
+}

AudioRotationMonitor/src/org/lineageos/audiorotationmonitor/DisplayListenerService.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2019 The LineageOS Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.lineageos.audiorotationmonitor;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.util.Log;
+
+public class DisplayListenerService extends Service {
+    private static final String TAG = "DisplayListenerService";
+    private static final boolean DEBUG = true;
+
+    private DisplayListener mDisplayListener;
+
+    @Override
+    public void onCreate() {
+        if (DEBUG) Log.d(TAG, "Creating service");
+        mDisplayListener = new DisplayListener(this);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (DEBUG) Log.d(TAG, "Starting service");
+        mDisplayListener.enable();
+        return START_STICKY;
+    }
+
+    @Override
+    public void onDestroy() {
+        if (DEBUG) Log.d(TAG, "Destroying service");
+        mDisplayListener.disable();
+        super.onDestroy();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}

gts3l.mk

@@ -101,7 +101,9 @@ PRODUCT_PACKAGES += \
     libqcomvoiceprocessing \
     libvolumelistener \
     tinymix \
-    libaudioprimary_shim
+    libaudioprimary_shim \
+    AudioRotationMonitor \
+    set-audio-rotation
 
 PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/audio/audio/audio_policy_configuration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/audio/audio_policy_configuration.xml \

sepolicy/file_contexts

@@ -17,6 +17,7 @@
 # Binaries
 /(vendor|system/vendor)/bin/hw/macloader       u:object_r:macloader_exec:s0
 /(vendor|system/vendor)/bin/secril_config_svc  u:object_r:secril_config_svc_exec:s0
+/system/bin/set-audio-rotation                 u:object_r:set-audio-rotation_exec:s0
 
 # Data files
 /data/camera(/.*)?                   u:object_r:camera_socket:s0

sepolicy/property_contexts

@@ -32,6 +32,7 @@ ro.vendor.camera.wrapper.hal3TrebleMinorVersion   u:object_r:sec_camera_prop:s0
 ro.vendor.multisim.                    u:object_r:vendor_radio_prop:s0
 ro.vendor.radio.                       u:object_r:vendor_radio_prop:s0
 service.camera.                        u:object_r:sec_camera_prop:s0
+sys.audio.rotation                     u:object_r:exported_system_prop:s0
 sys.cameramode.                        u:object_r:sec_camera_prop:s0
 system.camera.CC.                      u:object_r:sec_camera_prop:s0
 vendor.bluetooth_fw_ver                u:object_r:vendor_bluetooth_prop:s0

sepolicy/set-audio-rotation.te

@@ -0,0 +1,8 @@
+type set-audio-rotation, domain, coredomain;
+type set-audio-rotation_exec, exec_type, file_type;
+
+init_daemon_domain(set-audio-rotation)
+
+# Allow set-audio-rotation to read and write to audio_device
+allow set-audio-rotation audio_device:dir r_dir_perms;
+allow set-audio-rotation audio_device:chr_file rw_file_perms;