1 files changed, 131 insertions, 0 deletions
diff --git a/src/org/cyanogenmod/audiofx/audiofx/service/AudioOutputChangeListener.java b/src/org/cyanogenmod/audiofx/audiofx/service/AudioOutputChangeListener.java
new file mode 100644
index 0000000..f85d9c1
--- /dev/null
+++ b/src/org/cyanogenmod/audiofx/audiofx/service/AudioOutputChangeListener.java
@@ -0,0 +1,131 @@
+
+package com.cyngn.audiofx.service;
+
+import static android.media.AudioDeviceInfo.convertDeviceTypeToInternalDevice;
+
+import android.content.Context;
+import android.media.AudioDeviceCallback;
+import android.media.AudioDeviceInfo;
+import android.media.AudioManager;
+import android.os.Handler;
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class AudioOutputChangeListener extends AudioDeviceCallback {
+
+    private static final String TAG = "AudioFx-" + AudioOutputChangeListener.class.getSimpleName();
+
+    private boolean mInitial = true;
+
+    private final Context mContext;
+    private final AudioManager mAudioManager;
+    private final Handler mHandler;
+    private int mLastDevice = -1;
+
+    private final ArrayList<AudioOutputChangedCallback> mCallbacks = new ArrayList<AudioOutputChangedCallback>();
+
+    public interface AudioOutputChangedCallback {
+        public void onAudioOutputChanged(boolean firstChange, AudioDeviceInfo outputDevice);
+    }
+
+    public AudioOutputChangeListener(Context context, Handler handler) {
+        mContext = context;
+        mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
+        mHandler = handler;
+    }
+
+    public void addCallback(AudioOutputChangedCallback... callbacks) {
+        synchronized (mCallbacks) {
+            boolean initial = mCallbacks.size() == 0;
+            mCallbacks.addAll(Arrays.asList(callbacks));
+            if (initial) {
+                mAudioManager.registerAudioDeviceCallback(this, mHandler);
+            }
+        }
+    }
+
+    public void removeCallback(AudioOutputChangedCallback... callbacks) {
+        synchronized (mCallbacks) {
+            mCallbacks.removeAll(Arrays.asList(callbacks));
+            if (mCallbacks.size() == 0) {
+                mAudioManager.unregisterAudioDeviceCallback(this);
+            }
+        }
+    }
+
+    private void callback() {
+        synchronized (mCallbacks) {
+        final AudioDeviceInfo device = getCurrentDevice();
+
+            if (device == null) {
+                Log.w(TAG, "Unable to determine audio device!");
+                return;
+            }
+
+            if (mInitial || device.getId() != mLastDevice) {
+                Log.d(TAG, "onAudioOutputChanged id: " + device.getId() +
+                        " type: " + device.getType() +
+                        " name: " + device.getProductName() +
+                        " address: " + device.getAddress() +
+                        " [" + device.toString() + "]");
+                mLastDevice = device.getId();
+                mHandler.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        synchronized (mCallbacks) {
+                            for (AudioOutputChangedCallback callback : mCallbacks) {
+                                callback.onAudioOutputChanged(mInitial, device);
+                            }
+                        }
+                    }
+                });
+
+                if (mInitial) {
+                    mInitial = false;
+                }
+            }
+        }
+    }
+
+    public void refresh() {
+        callback();
+    }
+
+    @Override
+    public void onAudioDevicesAdded(AudioDeviceInfo[] addedDevices) {
+        callback();
+    }
+
+    @Override
+    public void onAudioDevicesRemoved(AudioDeviceInfo[] removedDevices) {
+        callback();
+    }
+
+    public List<AudioDeviceInfo> getConnectedOutputs() {
+        final List<AudioDeviceInfo> outputs = new ArrayList<AudioDeviceInfo>();
+        final int forMusic = mAudioManager.getDevicesForStream(AudioManager.STREAM_MUSIC);
+        for (AudioDeviceInfo ai : mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
+            if ((convertDeviceTypeToInternalDevice(ai.getType()) & forMusic) > 0) {
+                outputs.add(ai);
+            }
+        }
+        return outputs;
+    }
+
+    public AudioDeviceInfo getCurrentDevice() {
+        final List<AudioDeviceInfo> devices = getConnectedOutputs();
+        return devices.size() > 0 ? devices.get(0) : null;
+    }
+
+    public AudioDeviceInfo getDeviceById(int id) {
+        for (AudioDeviceInfo ai :  mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
+            if (ai.getId() == id) {
+                return ai;
+            }
+        }
+        return null;
+    }
+}