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Add Bluetooth mic support for video recording, untested.
Signed-off-by: Keith Conger <keith.conger@blackboxembedded.com>
1 parent c101c85 commit f7a46e2

3 files changed

Lines changed: 267 additions & 12 deletions

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‎app/src/main/AndroidManifest.xml‎

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@@ -28,6 +28,7 @@
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<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
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<uses-permission android:name="android.permission.CAMERA" />
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<uses-permission android:name="android.permission.RECORD_AUDIO" />
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<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
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<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
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<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
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<uses-permission android:name="android.permission.CALL_PHONE" />

‎app/src/main/java/com/blackboxembedded/WunderLINQ/BluetoothMicRouter.java‎

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/*
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WunderLINQ Client Application
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Copyright (C) 2020 Keith Conger, Black Box Embedded, LLC
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.blackboxembedded.WunderLINQ;
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import android.Manifest;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.media.AudioDeviceInfo;
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import android.media.AudioManager;
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import android.os.Build;
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import android.os.Handler;
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import android.os.Looper;
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import android.util.Log;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.core.content.ContextCompat;
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import static android.content.pm.PackageManager.PERMISSION_GRANTED;
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public final class BluetoothMicRouter {
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private static final String TAG = "BluetoothMicRouter";
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private static final long LEGACY_SCO_TIMEOUT_MS = 4000; // fail-safe
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private final Context appContext;
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private final AudioManager audioManager;
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private final Handler mainHandler = new Handler(Looper.getMainLooper());
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@Nullable private BroadcastReceiver scoReceiver;
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@Nullable private Runnable pendingCallback;
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@Nullable private Runnable scoTimeout;
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private boolean usingBtMic = false;
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private boolean waitingForSco = false;
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public BluetoothMicRouter(@NonNull Context ctx) {
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this.appContext = ctx.getApplicationContext();
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this.audioManager = (AudioManager) appContext.getSystemService(Context.AUDIO_SERVICE);
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}
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/**
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* Attempts to route input to a Bluetooth microphone if one is present.
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* Calls {@code onInputReady.run()}:
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* - immediately if routing succeeds (API 31+) or no BT mic is present (fallback to built-in),
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* - after SCO connects on legacy devices (<=30), or after a timeout (fallback).
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*/
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public void routeToBluetoothIfPresentThen(@NonNull Runnable onInputReady) {
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if (audioManager == null) {
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Log.w(TAG, "AudioManager null; continuing without BT mic");
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runOnMain(onInputReady);
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return;
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}
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// API 31+ modern routing
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
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if (ContextCompat.checkSelfPermission(appContext, Manifest.permission.BLUETOOTH_CONNECT) != PERMISSION_GRANTED) {
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Log.w(TAG, "BLUETOOTH_CONNECT not granted; continuing without BT routing");
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runOnMain(onInputReady);
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return;
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}
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try {
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AudioDeviceInfo bt = findBluetoothInputApi31Plus();
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if (bt != null) {
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audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
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boolean ok = audioManager.setCommunicationDevice(bt);
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usingBtMic = ok;
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Log.d(TAG, "setCommunicationDevice -> " + ok + " (" + deviceLabel(bt) + ")");
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// Either way, start now (if ok=true it's BT, else built-in)
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runOnMain(onInputReady);
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return;
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}
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} catch (SecurityException se) {
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Log.w(TAG, "setCommunicationDevice denied", se);
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} catch (Throwable t) {
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Log.w(TAG, "API31+ routing error", t);
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}
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// No BT mic found; continue with built-in
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runOnMain(onInputReady);
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return;
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}
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// Legacy (<=30): SCO
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if (audioManager.isBluetoothScoAvailableOffCall()) {
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try {
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audioManager.setMode(AudioManager.MODE_IN_COMMUNICATION);
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// Some OEMs require this deprecated toggle for SCO mic path pre-31:
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try {
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audioManager.setBluetoothScoOn(true);
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} catch (Throwable ignored) { }
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waitingForSco = true;
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registerScoReceiver(onInputReady);
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audioManager.startBluetoothSco();
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Log.d(TAG, "startBluetoothSco() called; waiting for SCO connect");
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// Fail-safe timeout: start anyway after X ms if SCO never connects
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scoTimeout = () -> {
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Log.w(TAG, "SCO connect timeout; continuing without BT mic");
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waitingForSco = false;
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runAndClearPending(onInputReady);
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};
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mainHandler.postDelayed(scoTimeout, LEGACY_SCO_TIMEOUT_MS);
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return;
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} catch (Throwable t) {
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Log.w(TAG, "Legacy SCO routing error; continuing without BT mic", t);
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}
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}
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// No SCO available; continue with built-in
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runOnMain(onInputReady);
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}
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/** Undo routing and restore audio mode. Safe to call multiple times. */
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public void clearRouting() {
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// Cancel timeout/pending
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if (scoTimeout != null) {
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mainHandler.removeCallbacks(scoTimeout);
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scoTimeout = null;
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}
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pendingCallback = null;
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// Unregister receiver
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if (scoReceiver != null) {
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try { appContext.unregisterReceiver(scoReceiver); } catch (Throwable ignored) {}
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scoReceiver = null;
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}
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// Clear routing
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if (audioManager != null) {
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try {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
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audioManager.clearCommunicationDevice();
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} else {
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if (waitingForSco || usingBtMic) {
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try { audioManager.stopBluetoothSco(); } catch (Throwable ignored) {}
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try {
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audioManager.setBluetoothScoOn(false);
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} catch (Throwable ignored) {}
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}
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}
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} catch (Throwable t) {
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Log.w(TAG, "clearRouting error", t);
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}
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try {
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audioManager.setMode(AudioManager.MODE_NORMAL);
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} catch (Throwable ignored) {}
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}
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usingBtMic = false;
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waitingForSco = false;
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}
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/** True if we successfully routed to a BT mic. */
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public boolean isUsingBtMic() { return usingBtMic; }
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/** True while <=30 is waiting for SCO connection. */
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public boolean isWaitingForSco() { return waitingForSco; }
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// ---------- Internals ----------
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@Nullable
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private AudioDeviceInfo findBluetoothInputApi31Plus() {
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// Look through input devices and find first BT-capable mic
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for (AudioDeviceInfo dev : audioManager.getDevices(AudioManager.GET_DEVICES_INPUTS)) {
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int type = dev.getType();
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if (type == AudioDeviceInfo.TYPE_BLUETOOTH_SCO
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|| (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
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&& type == AudioDeviceInfo.TYPE_BLE_HEADSET)) {
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return dev;
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}
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}
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return null;
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}
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private void registerScoReceiver(@NonNull Runnable onInputReady) {
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if (scoReceiver != null) return;
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pendingCallback = onInputReady;
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IntentFilter f = new IntentFilter(AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED);
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scoReceiver = new BroadcastReceiver() {
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@Override public void onReceive(Context context, Intent intent) {
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if (!AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED.equals(intent.getAction())) return;
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int state = intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1);
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if (state == AudioManager.SCO_AUDIO_STATE_CONNECTED) {
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Log.d(TAG, "SCO connected");
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usingBtMic = true;
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waitingForSco = false;
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// Cancel timeout, run callback
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if (scoTimeout != null) {
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mainHandler.removeCallbacks(scoTimeout);
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scoTimeout = null;
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}
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runAndClearPending(null);
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} else if (state == AudioManager.SCO_AUDIO_STATE_DISCONNECTED) {
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Log.d(TAG, "SCO disconnected");
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}
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}
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};
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appContext.registerReceiver(scoReceiver, f);
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}
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private void runAndClearPending(@Nullable Runnable fallback) {
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Runnable cb = pendingCallback != null ? pendingCallback : fallback;
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pendingCallback = null;
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if (cb != null) runOnMain(cb);
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}
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private void runOnMain(@NonNull Runnable r) {
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if (Looper.myLooper() == Looper.getMainLooper()) r.run();
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else mainHandler.post(r);
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}
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private static String deviceLabel(AudioDeviceInfo dev) {
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String addr = null;
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) { // API 28+
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try { addr = dev.getAddress(); } catch (Throwable ignored) {}
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}
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CharSequence pn = dev.getProductName(); // avail since API 23
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String name = (pn != null) ? pn.toString() : "unknown";
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// On API < 28 we won't have an address; include id/name instead.
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return "type=" + dev.getType()
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+ " id=" + dev.getId()
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+ " name=" + name
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+ ((addr != null && !addr.isEmpty()) ? " addr=" + addr : "");
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}
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}

‎app/src/main/java/com/blackboxembedded/WunderLINQ/VideoRecService.java‎

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Original file line numberDiff line numberDiff line change
@@ -86,6 +86,8 @@ public class VideoRecService extends Service implements LifecycleOwner {
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private VideoCapture<Recorder> videoCapture;
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private Recording activeRecording;
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private BluetoothMicRouter btRouter;
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// Optional: last known location (for MediaStore LAT/LON columns)
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@Nullable private Location location;
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lifecycleRegistry = new LifecycleRegistry(this);
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lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
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createNotification();
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btRouter = new BluetoothMicRouter(this);
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}
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@Override
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.setContentValues(values)
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.build();
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beginRecording(outputOptions);
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btRouter.routeToBluetoothIfPresentThen(() -> beginRecording(outputOptions));
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}
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private void startRecordingToFile() {
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FileOutputOptions outputOptions =
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new FileOutputOptions.Builder(out).build();
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beginRecording(outputOptions);
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btRouter.routeToBluetoothIfPresentThen(() -> beginRecording(outputOptions));
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}
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201205
@SuppressLint("MissingPermission")
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((MyApplication) getApplication()).setVideoRecording(false);
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290294
lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY);
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if (btRouter != null) btRouter.clearRouting();
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super.onDestroy();
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}
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// --- Foreground notification (unchanged style) ---
295300
private void createNotification() {
296-
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
297-
NotificationChannel ch = new NotificationChannel(
298-
CHANNEL_ID,
299-
getString(R.string.title_video_notification),
300-
NotificationManager.IMPORTANCE_DEFAULT
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);
302-
ch.setShowBadge(false);
303-
ch.setSound(null, null);
304-
((NotificationManager) getSystemService(NOTIFICATION_SERVICE)).createNotificationChannel(ch);
305-
}
301+
NotificationChannel ch = new NotificationChannel(
302+
CHANNEL_ID,
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getString(R.string.title_video_notification),
304+
NotificationManager.IMPORTANCE_DEFAULT
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);
306+
ch.setShowBadge(false);
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ch.setSound(null, null);
308+
((NotificationManager) getSystemService(NOTIFICATION_SERVICE)).createNotificationChannel(ch);
306309
Notification notif = new NotificationCompat.Builder(this, CHANNEL_ID)
307310
.setContentTitle(getString(R.string.title_video_notification))
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.setContentText("")

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