| /* |
| * Copyright 2014, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.telecom; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.media.AudioAttributes; |
| import android.media.session.MediaSession; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.telecom.Log; |
| import android.view.KeyEvent; |
| |
| /** |
| * Static class to handle listening to the headset media buttons. |
| */ |
| public class HeadsetMediaButton extends CallsManagerListenerBase { |
| |
| // Types of media button presses |
| static final int SHORT_PRESS = 1; |
| static final int LONG_PRESS = 2; |
| |
| private static final AudioAttributes AUDIO_ATTRIBUTES = new AudioAttributes.Builder() |
| .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH) |
| .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION).build(); |
| |
| private static final int MSG_MEDIA_SESSION_INITIALIZE = 0; |
| private static final int MSG_MEDIA_SESSION_SET_ACTIVE = 1; |
| |
| private final MediaSession.Callback mSessionCallback = new MediaSession.Callback() { |
| @Override |
| public boolean onMediaButtonEvent(Intent intent) { |
| KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT); |
| Log.v(this, "SessionCallback.onMediaButton()... event = %s.", event); |
| if ((event != null) && (event.getKeyCode() == KeyEvent.KEYCODE_HEADSETHOOK)) { |
| synchronized (mLock) { |
| Log.v(this, "SessionCallback: HEADSETHOOK"); |
| boolean consumed = handleHeadsetHook(event); |
| Log.v(this, "==> handleHeadsetHook(): consumed = %b.", consumed); |
| return consumed; |
| } |
| } |
| return true; |
| } |
| }; |
| |
| private final Handler mMediaSessionHandler = new Handler(Looper.getMainLooper()) { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_MEDIA_SESSION_INITIALIZE: { |
| MediaSession session = new MediaSession( |
| mContext, |
| HeadsetMediaButton.class.getSimpleName()); |
| session.setCallback(mSessionCallback); |
| session.setFlags(MediaSession.FLAG_EXCLUSIVE_GLOBAL_PRIORITY |
| | MediaSession.FLAG_HANDLES_MEDIA_BUTTONS); |
| session.setPlaybackToLocal(AUDIO_ATTRIBUTES); |
| mSession = session; |
| break; |
| } |
| case MSG_MEDIA_SESSION_SET_ACTIVE: { |
| if (mSession != null) { |
| boolean activate = msg.arg1 != 0; |
| if (activate != mSession.isActive()) { |
| mSession.setActive(activate); |
| } |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| }; |
| |
| private final Context mContext; |
| private final CallsManager mCallsManager; |
| private final TelecomSystem.SyncRoot mLock; |
| private MediaSession mSession; |
| private KeyEvent mLastHookEvent; |
| |
| public HeadsetMediaButton( |
| Context context, |
| CallsManager callsManager, |
| TelecomSystem.SyncRoot lock) { |
| mContext = context; |
| mCallsManager = callsManager; |
| mLock = lock; |
| |
| // Create a MediaSession but don't enable it yet. This is a |
| // replacement for MediaButtonReceiver |
| mMediaSessionHandler.obtainMessage(MSG_MEDIA_SESSION_INITIALIZE).sendToTarget(); |
| } |
| |
| /** |
| * Handles the wired headset button while in-call. |
| * |
| * @return true if we consumed the event. |
| */ |
| private boolean handleHeadsetHook(KeyEvent event) { |
| Log.d(this, "handleHeadsetHook()...%s %s", event.getAction(), event.getRepeatCount()); |
| |
| // Save ACTION_DOWN Event temporarily. |
| if (event.getAction() == KeyEvent.ACTION_DOWN) { |
| mLastHookEvent = event; |
| } |
| |
| if (event.isLongPress()) { |
| return mCallsManager.onMediaButton(LONG_PRESS); |
| } else if (event.getAction() == KeyEvent.ACTION_UP) { |
| // We should not judge SHORT_PRESS by ACTION_UP event repeatCount, because it always |
| // return 0. |
| // Actually ACTION_DOWN event repeatCount only increases when LONG_PRESS performed. |
| if (mLastHookEvent != null && mLastHookEvent.getRepeatCount() == 0) { |
| return mCallsManager.onMediaButton(SHORT_PRESS); |
| } |
| } |
| |
| if (event.getAction() != KeyEvent.ACTION_DOWN) { |
| mLastHookEvent = null; |
| } |
| |
| return true; |
| } |
| |
| /** ${inheritDoc} */ |
| @Override |
| public void onCallAdded(Call call) { |
| if (call.isExternalCall()) { |
| return; |
| } |
| mMediaSessionHandler.obtainMessage(MSG_MEDIA_SESSION_SET_ACTIVE, 1, 0).sendToTarget(); |
| } |
| |
| /** ${inheritDoc} */ |
| @Override |
| public void onCallRemoved(Call call) { |
| if (call.isExternalCall()) { |
| return; |
| } |
| if (!mCallsManager.hasAnyCalls()) { |
| mMediaSessionHandler.obtainMessage(MSG_MEDIA_SESSION_SET_ACTIVE, 0, 0).sendToTarget(); |
| } |
| } |
| |
| /** ${inheritDoc} */ |
| @Override |
| public void onExternalCallChanged(Call call, boolean isExternalCall) { |
| if (isExternalCall) { |
| onCallRemoved(call); |
| } else { |
| onCallAdded(call); |
| } |
| } |
| } |