From 862de214365a0ba8ad37fd23e026ebb1de43cb4e Mon Sep 17 00:00:00 2001
From: Myzel394 <50424412+Myzel394@users.noreply.github.com>
Date: Sat, 21 Oct 2023 17:18:57 +0200
Subject: [PATCH] feat: Add PoC for sources for AudioRecorderService

---
 .../alibi/services/AudioRecorderService.kt    | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/app/src/main/java/app/myzel394/alibi/services/AudioRecorderService.kt b/app/src/main/java/app/myzel394/alibi/services/AudioRecorderService.kt
index 0d8617a..413fa91 100644
--- a/app/src/main/java/app/myzel394/alibi/services/AudioRecorderService.kt
+++ b/app/src/main/java/app/myzel394/alibi/services/AudioRecorderService.kt
@@ -1,12 +1,19 @@
 package app.myzel394.alibi.services
 
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Intent
+import android.media.AudioDeviceInfo
+import android.media.AudioManager
 import android.media.MediaRecorder
 import android.media.MediaRecorder.OnErrorListener
+import android.media.MediaRecorder.getAudioSourceMax
 import android.os.Build
 import java.lang.IllegalStateException
 
 class AudioRecorderService: IntervalRecorderService() {
     var amplitudesAmount = 1000
+    var selectedDevice: AudioDeviceInfo? = null
 
     var recorder: MediaRecorder? = null
         private set
@@ -15,12 +22,39 @@ class AudioRecorderService: IntervalRecorderService() {
     val filePath: String
         get() = "$folder/$counter.${settings!!.fileExtension}"
 
+    private fun _setAudioDevice() {
+        val audioManger = getSystemService(AUDIO_SERVICE)!! as AudioManager
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        if (selectedDevice == null) {
+                audioManger.clearCommunicationDevice()
+        } else {
+            audioManger.setCommunicationDevice(selectedDevice!!)
+        }
+        } else {
+            if (selectedDevice == null) {
+                audioManger.stopBluetoothSco()
+            } else {
+                audioManger.startBluetoothSco()
+            }
+        }
+
+    }
+
     private fun createRecorder(): MediaRecorder {
+        _setAudioDevice()
+
         return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
             MediaRecorder(this)
         } else {
             MediaRecorder()
         }.apply {
+            // Audio Source is kinda strange, here are my experimental findings using a Pixel 7 Pro
+            // and Redmi Buds 3 Pro:
+            // - MIC: Uses the bottom microphone of the phone (17)
+            // - CAMCORDER: Uses the top microphone of the phone (2)
+            // - VOICE_COMMUNICATION: Uses the bottom microphone of the phone (17)
+            // - DEFAULT: Uses the bottom microphone of the phone (17)
             setAudioSource(MediaRecorder.AudioSource.MIC)
             setOutputFile(filePath)
             setOutputFormat(settings!!.outputFormat)
@@ -82,4 +116,30 @@ class AudioRecorderService: IntervalRecorderService() {
             0
         }
     }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent?.action == "changeAudioDevice") {
+            selectedDevice = intent.getStringExtra("deviceID")!!.let {
+                if (it == "null") {
+                    null
+                } else {
+                    val audioManager = getSystemService(AUDIO_SERVICE)!! as AudioManager
+                    audioManager.getDevices(AudioManager.GET_DEVICES_INPUTS).find { device ->
+                        device.id == it.toInt()
+                    }
+                }
+            }
+        }
+
+        return super.onStartCommand(intent, flags, startId)
+    }
+
+    companion object {
+        fun changeAudioDevice(deviceID: String?, context: Context) {
+            val intent = Intent("changeAudioDevice").apply {
+                putExtra("deviceID", deviceID ?: "null")
+            }
+            context.startService(intent)
+        }
+    }
 }
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