AFSK: allow bluetooth headset, audio routing

AndroidManifest.xml

@@ -11,6 +11,7 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="android.permission.VIBRATE"/>
 

res/values/arrays.xml

@@ -14,6 +14,12 @@
 		<item>afsk</item>
 		<item>bluetooth</item>
 	</string-array>
+	<string-array name="p_afsk_out_ev">
+		<item>0</item>
+		<item>2</item>
+		<item>3</item>
+		<item>4</item>
+	</string-array>
 
 	<string-array name="p_locsource_e">
 		<item>@string/p_source_smart</item>

res/values/strings.xml

@@ -257,6 +257,15 @@
 <string name="p_afsk_prefix">Frame Sync Prefix</string>
 <string name="p_afsk_prefix_summary">No-Op Preamble (e.g. for VOX control)</string>
 <string name="p_afsk_prefix_entry">Enter the prefix time [ms]</string>
+<string name="p_afsk_btsco">Bluetooth Headset</string>
+<string name="p_afsk_btsco_summary">Use Bluetooth (SCO) headset for AFSK</string>
+<string name="p_afsk_output">Audio Output</string>
+<string-array name="p_afsk_out_e">
+	<item>Voice Call</item>
+	<item>Ringtone</item>
+	<item>Music</item>
+	<item>Alarm</item>
+</string-array>
 
 <!-- TCP server settings -->
 <string name="p_tcp_server_summary">APRS-IS TCP server (port 14580) to contact</string>
@@ -300,4 +309,7 @@
 <string name="bt_error_unsupported">Bluetooth is not supported!</string>
 <string name="bt_error_disabled">Please enable Bluetooth!</string>
 <string name="bt_error_no_tnc">Please configure a Bluetooth TNC!</string>
+
+<string name="afsk_info_sco_req">Requesting bluetooth SCO link...</string>
+<string name="afsk_info_sco_est">Bluetooth SCO link established.</string>
 </resources>

res/xml/backend_afsk.xml

@@ -5,13 +5,21 @@
     <PreferenceCategory
 	    android:title="@string/p_conn_afsk">
 
-        <de.duenndns.EditTextPreferenceWithValue
-                android:key="digi_path"
-		android:hint="hop1,hop2,.."
-		android:defaultValue="WIDE1-1"
-		android:title="@string/p_aprs_path"
-		android:summary="@string/p_aprs_path_summary"
-		android:dialogTitle="@string/p_aprs_path_entry" />
+        <CheckBoxPreference
+                android:key="afsk.btsco"
+		android:title="@string/p_afsk_btsco"
+		android:summary="@string/p_afsk_btsco_summary"
+		android:defaultValue="false"
+		/>
+
+        <de.duenndns.ListPreferenceWithValue
+                android:key="afsk.output"
+		android:title="@string/p_afsk_output"
+                android:entries="@array/p_afsk_out_e"
+                android:entryValues="@array/p_afsk_out_ev"
+		android:defaultValue="0"
+		android:dialogTitle="@string/p_afsk_output"
+		/>
 
         <de.duenndns.EditTextPreferenceWithValue
                 android:key="afsk.prefix"
@@ -22,6 +30,14 @@
 		android:summary="@string/p_afsk_prefix_summary"
 		android:dialogTitle="@string/p_afsk_prefix_entry" />
 
+        <de.duenndns.EditTextPreferenceWithValue
+                android:key="digi_path"
+		android:hint="hop1,hop2,.."
+		android:defaultValue="WIDE1-1"
+		android:title="@string/p_aprs_path"
+		android:summary="@string/p_aprs_path_summary"
+		android:dialogTitle="@string/p_aprs_path_entry" />
+
     </PreferenceCategory>
 
 </PreferenceScreen>

src/backend/AfskUploader.scala

@@ -1,5 +1,7 @@
 package org.aprsdroid.app
 
+import _root_.android.content.{BroadcastReceiver, Context, Intent, IntentFilter}
+import _root_.android.media.AudioManager
 import _root_.android.util.Log
 import _root_.java.net.{InetAddress, DatagramSocket, DatagramPacket}
 import _root_.net.ab0oo.aprs.parser.{APRSPacket, Digipeater, Parser}
@@ -13,12 +15,36 @@ class AfskUploader(service : AprsService, prefs : PrefsWrapper) extends AprsIsUp
 	// frame prefix: bytes = milliseconds * baudrate / 8 / 1000
 	var FrameLength = prefs.getStringInt("afsk.prefix", 1000)*1200/8/1000
 	var Digis = prefs.getString("digi_path", "WIDE1-1")
-	val output = new Afsk()
+	val use_bt = prefs.getAfskBluetooth()
+	val out_type = prefs.getAfskOutput()
+	val output = new Afsk(out_type)
 	val abp = new AudioBufferProcessor(this)
 	
+	val btScoReceiver = new BroadcastReceiver() {
+		override def onReceive(ctx : Context, i : Intent) {
+			val state = i.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1)
+			Log.d(TAG, "AudioManager SCO event: " + state)
+			if (state == AudioManager.SCO_AUDIO_STATE_CONNECTED) {
+				// we are connected, perform actual start
+				log(service.getString(R.string.afsk_info_sco_est))
+				abp.start()
+				service.unregisterReceiver(this)
+				service.postPosterStarted()
+			}
+		}
+	}
+
 	def start() = {
-		abp.start()
-		true
+		if (use_bt) {
+			log(service.getString(R.string.afsk_info_sco_req))
+			service.getSystemService(Context.AUDIO_SERVICE)
+				.asInstanceOf[AudioManager].startBluetoothSco()
+			service.registerReceiver(btScoReceiver, new IntentFilter(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED))
+			false
+		} else {
+			abp.start()
+			true
+		}
 	}
 
 	def update(packet : APRSPacket) : String = {
@@ -35,6 +61,9 @@ class AfskUploader(service : AprsService, prefs : PrefsWrapper) extends AprsIsUp
 
 	def stop() {
 		abp.stopRecording()
+		if (use_bt)
+			service.getSystemService(Context.AUDIO_SERVICE)
+				.asInstanceOf[AudioManager].stopBluetoothSco()
 	}
 
 	def received(data : Array[Byte]) {
@@ -45,4 +74,10 @@ class AfskUploader(service : AprsService, prefs : PrefsWrapper) extends AprsIsUp
 				Log.e(TAG, "bad packet: %s".format(data.map("%02x".format(_)).mkString(" "))); e.printStackTrace()
 		}
 	}
+
+	def log(s : String) {
+		Log.i(TAG, s)
+		service.postAddPost(StorageDatabase.Post.TYPE_INFO, R.string.post_info, s)
+	}
+
 }