release 1.7.0

Android/app/build.gradle

@@ -4,15 +4,15 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
     buildToolsVersion "30.0.3"
 
     defaultConfig {
         applicationId "com.example.microphone"
         minSdkVersion 23
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 6
-        versionName "1.6"
+        versionName "1.7"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -35,13 +35,13 @@ android {
 dependencies {
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.3'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.1'
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3'
-    implementation 'androidx.core:core-ktx:1.3.1'
-    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'com.google.android.material:material:1.2.1'
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
-    testImplementation 'junit:junit:4.+'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    implementation 'androidx.core:core-ktx:1.7.0'
+    implementation 'androidx.appcompat:appcompat:1.4.1'
+    implementation 'com.google.android.material:material:1.6.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
+    testImplementation 'junit:junit:'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 }

Android/app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     package="com.example.microphone">
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
@@ -16,7 +17,8 @@
         android:theme="@style/Theme.Microphone"
         android:name=".DefaultApp">
         <activity
-            android:name=".MainActivity">
+            android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <action android:name="android.intent.action.VIEW" />

Android/app/src/main/java/com/example/microphone/MainActivity.kt

@@ -91,6 +91,12 @@ class MainActivity : AppCompatActivity()
         // check for audio permission
         if(ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED)
             ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.RECORD_AUDIO), 0)
+        if(ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH) != PackageManager.PERMISSION_GRANTED)
+            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.BLUETOOTH), 0)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            if(ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED)
+                ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.BLUETOOTH_CONNECT), 0)
+        }
         // start handler thread
         handlerThread = HandlerThread("MicActivityStart", Process.THREAD_PRIORITY_BACKGROUND)
         handlerThread.start()

Android/app/src/main/java/com/example/microphone/audio/AudioBuffer.kt

@@ -6,7 +6,7 @@ import kotlinx.coroutines.sync.withLock
 class AudioBuffer
 {
     // set buffer size for latency
-    private val BUFFER_SIZE = 2
+    private val BUFFER_SIZE = 3
     // actual buffer of byte arrays (FIFO with queue)
     private val buffer = ArrayDeque<ByteArray>()
     // mutex for coroutines

Android/app/src/main/java/com/example/microphone/audio/MicAudioManager.kt

@@ -4,7 +4,6 @@ import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
 import android.media.AudioFormat
-import android.media.AudioManager
 import android.media.AudioRecord
 import android.media.MediaRecorder
 import android.util.Log
@@ -42,8 +41,6 @@ class MicAudioManager(ctx : Context) {
         require(ContextCompat.checkSelfPermission(ctx, Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED){
             "Microphone recording is not permitted"
         }
-        // setup noise suppression
-        (ctx.getSystemService(Context.AUDIO_SERVICE) as AudioManager).setParameters("noise_suppression=auto")
         // init recorder
         recorder = AudioRecord(AUDIO_SOURCE, SAMPLE_RATE, CHANNEL_CONFIG, AUDIO_FORMAT, BUFFER_SIZE)
         require(recorder?.state == AudioRecord.STATE_INITIALIZED){"Microphone not init properly"}
@@ -53,7 +50,7 @@ class MicAudioManager(ctx : Context) {
     suspend fun record(audioBuffer : AudioBuffer)
     {
         // read number of shorts
-        val size = recorder?.read(buffer, 0, BUFFER_SIZE, AudioRecord.READ_BLOCKING) ?: return
+        val size = recorder?.read(buffer, 0, BUFFER_SIZE) ?: return
         if(size <= 0)
         {
             delay(RECORD_DELAY)

Android/app/src/main/java/com/example/microphone/service/ForegroundService.kt

@@ -379,7 +379,7 @@ class ForegroundService : Service() {
             val onTap = Intent(ctx, MainActivity::class.java).apply {
                 addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT)
             }
-            val pendingIntent = PendingIntent.getActivity(ctx, 0, onTap, 0)
+            val pendingIntent = PendingIntent.getActivity(ctx, 0, onTap, PendingIntent.FLAG_IMMUTABLE)
             val builder = NotificationCompat.Builder(ctx, "AndroidMic")
                 .setSmallIcon(R.drawable.icon)
                 .setContentTitle(getString(R.string.activity_name))

Android/app/src/main/java/com/example/microphone/streaming/BluetoothStreamer.kt

@@ -1,15 +1,13 @@
 package com.example.microphone.streaming
 
 import android.Manifest
-import android.bluetooth.BluetoothAdapter
-import android.bluetooth.BluetoothClass
-import android.bluetooth.BluetoothDevice
-import android.bluetooth.BluetoothSocket
+import android.bluetooth.*
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.content.pm.PackageManager
+import android.os.Build
 import android.util.Log
 import androidx.core.content.ContextCompat
 import com.example.microphone.audio.AudioBuffer
@@ -26,7 +24,7 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
     private val myUUID : UUID = UUID.fromString("34335e34-bccf-11eb-8529-0242ac130003")
     private val MAX_WAIT_TIME = 1500L // timeout
 
-    private val adapter : BluetoothAdapter? = BluetoothAdapter.getDefaultAdapter()
+    private val adapter : BluetoothAdapter
     private var target : BluetoothDevice? = null
     private var socket : BluetoothSocket? = null
 
@@ -51,12 +49,20 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
     // init everything
     init
     {
+        // get bluetooth adapter
+        val bm = ctx.getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
+        adapter = bm.adapter
         // check bluetooth adapter
         require(adapter != null) {"Bluetooth adapter is not found"}
         // check permission
         require(ContextCompat.checkSelfPermission(ctx, Manifest.permission.BLUETOOTH) == PackageManager.PERMISSION_GRANTED){
             "Bluetooth is not permitted"
         }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            require(ContextCompat.checkSelfPermission(ctx, Manifest.permission.BLUETOOTH_CONNECT) == PackageManager.PERMISSION_GRANTED){
+                "Bluetooth is not permitted"
+            }
+        }
         require(adapter.isEnabled){"Bluetooth adapter is not enabled"}
         // set target device
         selectTargetDevice()
@@ -77,13 +83,21 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
         } catch (e : IOException) {
             Log.d(TAG, "connect [createInsecureRfcommSocketToServiceRecord]: ${e.message}")
             null
+        } catch (e : SecurityException)
+        {
+            Log.d(TAG, "connect [createInsecureRfcommSocketToServiceRecord]: ${e.message}")
+            null
         } ?: return false
         // connect to server
         try {
             socket?.connect()
         } catch (e : IOException){
             Log.d(TAG, "connect [connect]: ${e.message}")
             return false
+        } catch (e : SecurityException)
+        {
+            Log.d(TAG, "connect [connect]: ${e.message}")
+            return false
         }
         Log.d(TAG, "connect: connected")
         return true
@@ -136,22 +150,28 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
     private fun selectTargetDevice()
     {
         target = null
-        val pairedDevices = adapter?.bondedDevices ?: return
-        for(device in pairedDevices)
-        {
-            if(device.bluetoothClass.majorDeviceClass == BluetoothClass.Device.Major.COMPUTER)
+        try {
+            val pairedDevices = adapter.bondedDevices ?: return
+            for(device in pairedDevices)
             {
-                Log.d(TAG, "selectTargetDevice: testing ${device.name}")
-                if(testConnection(device))
+                if(device.bluetoothClass.majorDeviceClass == BluetoothClass.Device.Major.COMPUTER)
                 {
-                    target = device
-                    Log.d(TAG, "selectTargetDevice: ${device.name} is valid")
-                    break
+                    Log.d(TAG, "selectTargetDevice: testing ${device.name}")
+                    if(testConnection(device))
+                    {
+                        target = device
+                        Log.d(TAG, "selectTargetDevice: ${device.name} is valid")
+                        break
+                    }
+                    else
+                        Log.d(TAG, "selectTargetDevice: ${device.name} is invalid")
                 }
-                else
-                    Log.d(TAG, "selectTargetDevice: ${device.name} is invalid")
             }
+        } catch(e : SecurityException)
+        {
+            Log.d(TAG, "selectTargetDevice: ${e.message}")
         }
+
     }
 
     // test connection with a device
@@ -165,13 +185,21 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
         } catch (e : IOException) {
             Log.d(TAG, "testConnection [createInsecureRfcommSocketToServiceRecord]: ${e.message}")
             null
+        } catch (e : SecurityException)
+        {
+            Log.d(TAG, "testConnection [createInsecureRfcommSocketToServiceRecord]: ${e.message}")
+            null
         } ?: return false
         // try to connect
         try {
             socket.connect()
         } catch (e : IOException){
             Log.d(TAG, "testConnection [connect]: ${e.message}")
             return false
+        } catch (e : SecurityException)
+        {
+            Log.d(TAG, "testConnection [connect]: ${e.message}")
+            return false
         }
         var isValid = false
         runBlocking(Dispatchers.IO) {
@@ -215,8 +243,15 @@ class BluetoothStreamer(private val ctx : Context) : Streamer {
     // get connected device information
     override fun getInfo() : String
     {
-        if(adapter == null || target == null || socket == null) return ""
-        return "[Device Name] ${target?.name}\n[Device Address] ${target?.address}"
+        if(target == null || socket == null) return ""
+        val deviceName = try {
+            target?.name
+        } catch (e : SecurityException)
+        {
+            Log.d(TAG, "getInfo: ${e.message}")
+            "null"
+        }
+        return "[Device Name] ${deviceName}\n[Device Address] ${target?.address}"
     }
 
     // return true if is connected for streaming

Android/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.0'
+        classpath 'com.android.tools.build:gradle:7.1.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

Android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Mon May 24 15:46:59 EDT 2021
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME

README.md

@@ -29,7 +29,11 @@ Use your Android phone as a microphone to Windows PC
 6. For microphone, click `Properties` and set following:  
    <img src="Assets/sound_config5.png" width="300" alt="sound config5">
 
-On my machine, this setup has the lowest delay and best sound quality. VB is not optimized as hardware devices, so these configurations are important for audio.
+On my machine, this setup has the lowest delay and best sound quality.  
+Can further improve audio latency by opening `VBCABLE_ControlPanel.exe` (from downloaded folder of VB) and set `Max Latency` in Options to 2048 smp:  
+<img src="Assets/sound_config6.png" width="600" alt="sound config6">
+
+Do not set to 512 smp since that will cause most buffers lost. If 2048 has no sound or bad quality, consider a higher smp.
 
 </details>
 
@@ -106,7 +110,7 @@ __SpeexDSP Filters__:
 - [ ] Audio effect filters (Not yet released)  
   - [x] Pitch Shifter  
   - [x] Add White Noise  
-  - [x] Repeated Background Track  
+  - [x] Repeated Background Audio  
   - [x] SpeexDSP Noise Cancellation  
   - [x] SpeexDSP Automatic Gain Control  
   - [x] SpeexDSP Voice Activity Detection  
@@ -121,18 +125,18 @@ Check out [Avalonia](https://github.com/AvaloniaUI/Avalonia)! With this it may b
 
 Pre-built installers can be found [here](https://github.com/teamclouday/AndroidMic/releases)  
 
-
 ------
 
 ## Windows Side
 
-<img src="Assets/p1.png" width="500" alt="Windows Side">
-
-## Android Side (Portrait)
+<p float="left">
+<img src="Assets/p1.png" width="510" alt="Windows Side">
+<img src="Assets/p4.png" width="250" alt="Windows Side">
+</p>
 
-<img src="Assets/p2.jpg" width="250" alt="Android Side">
+## Android Side
 
-## Android Side (Landscape)
+<img src="Assets/p2.jpg" width="250" alt="Android Side">  
 
 <img src="Assets/p3.jpg" width="500" alt="Android Side">
 

Windows/AndroidMic/AdvancedWindow.xaml

@@ -66,7 +66,7 @@
         <CheckBox Content="Noise Cancellation" VerticalContentAlignment="Center" x:Name="NoiseCancelEnableCheckbox"
                   FontSize="20" FontFamily="Comic Sans MS" VerticalAlignment="Bottom" Width="300"
                   Checked="NoiseCancelEnableCheckbox_StateChanged" Unchecked="NoiseCancelEnableCheckbox_StateChanged" Margin="0,0,0,170"/>
-        <CheckBox Content="Automic Gain Control" VerticalContentAlignment="Center" x:Name="AutomicGainEnableCheckbox"
+        <CheckBox Content="Automatic Gain Control" VerticalContentAlignment="Center" x:Name="AutomicGainEnableCheckbox"
                   FontSize="20" FontFamily="Comic Sans MS" VerticalAlignment="Bottom" Width="300"
                   Checked="AutomicGainEnableCheckbox_StateChanged" Unchecked="AutomicGainEnableCheckbox_StateChanged" Margin="0,0,0,130"/>
         <CheckBox Content="Voice Activity Detector" VerticalContentAlignment="Center" x:Name="VADEnableCheckbox"

Windows/AndroidMic/AndroidMic.csproj

@@ -30,7 +30,7 @@
     <ProductName>AndroidMic</ProductName>
     <PublisherName>Teamclouday</PublisherName>
     <ApplicationRevision>0</ApplicationRevision>
-    <ApplicationVersion>1.6.0.0</ApplicationVersion>
+    <ApplicationVersion>1.7.0.0</ApplicationVersion>
     <UseApplicationTrust>false</UseApplicationTrust>
     <PublishWizardCompleted>true</PublishWizardCompleted>
     <BootstrapperEnabled>true</BootstrapperEnabled>

Windows/AndroidMic/Library/Audio/AudioBuffer.cs

@@ -4,7 +4,7 @@ namespace AndroidMic.Audio
 {
     public class AudioBuffer
     {
-        public const int MAX_BUFFER_SIZE = 2;
+        public const int MAX_BUFFER_SIZE = 3;
         private readonly Queue<byte[]> buffer = new Queue<byte[]>();
         private readonly object toLock = new object();