content: /*
   * Copyright (C) 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.hdmi;
  
  import android.annotation.Nullable;
  import android.hardware.hdmi.HdmiControlManager;
  import android.hardware.hdmi.IHdmiControlCallback;
  import android.hardware.tv.cec.V1_0.SendMessageResult;
  import android.os.RemoteException;
  import android.util.Slog;
  import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
  
  /**
   * Action to update audio status (volume or mute) of audio amplifier
   */
  final class SystemAudioStatusAction extends HdmiCecFeatureAction {
      private static final String TAG = "SystemAudioStatusAction";
  
      // State that waits for <ReportAudioStatus>.
      private static final int STATE_WAIT_FOR_REPORT_AUDIO_STATUS = 1;
  
      private final int mAvrAddress;
      @Nullable private final IHdmiControlCallback mCallback;
  
      SystemAudioStatusAction(HdmiCecLocalDevice source, int avrAddress,
              IHdmiControlCallback callback) {
          super(source);
          mAvrAddress = avrAddress;
          mCallback = callback;
      }
  
      @Override
      boolean start() {
          mState = STATE_WAIT_FOR_REPORT_AUDIO_STATUS;
          addTimer(mState, HdmiConfig.TIMEOUT_MS);
          sendGiveAudioStatus();
          return true;
      }
  
      private void sendGiveAudioStatus() {
          sendCommand(HdmiCecMessageBuilder.buildGiveAudioStatus(getSourceAddress(), mAvrAddress),
                  new SendMessageCallback() {
              @Override
              public void onSendCompleted(int error) {
                  if (error != SendMessageResult.SUCCESS) {
                      handleSendGiveAudioStatusFailure();
                  }
              }
          });
      }
  
      private void handleSendGiveAudioStatusFailure() {
          // Inform to all application that the audio status (volume, mute) of
          // the audio amplifier is unknown.
          tv().setAudioStatus(false, Constants.UNKNOWN_VOLUME);
  
          sendUserControlPressedAndReleased(mAvrAddress,
                  HdmiCecKeycode.getMuteKey(!tv().isSystemAudioActivated()));
  
          // Still return SUCCESS to callback.
          finishWithCallback(HdmiControlManager.RESULT_SUCCESS);
      }
  
      @Override
      boolean processCommand(HdmiCecMessage cmd) {
          if (mState != STATE_WAIT_FOR_REPORT_AUDIO_STATUS || mAvrAddress != cmd.getSource()) {
              return false;
          }
  
          switch (cmd.getOpcode()) {
              case Constants.MESSAGE_REPORT_AUDIO_STATUS:
                  handleReportAudioStatus(cmd);
                  return true;
          }
  
          return false;
      }
  
      private void handleReportAudioStatus(HdmiCecMessage cmd) {
          byte[] params = cmd.getParams();
          boolean mute = HdmiUtils.isAudioStatusMute(cmd);
          int volume = HdmiUtils.getAudioStatusVolume(cmd);
          tv().setAudioStatus(mute, volume);
  
          if (!(tv().isSystemAudioActivated() ^ mute)) {
              // Toggle AVR's mute status to match with the system audio status.
              sendUserControlPressedAndReleased(mAvrAddress, HdmiCecKeycode.CEC_KEYCODE_MUTE);
          }
          finishWithCallback(HdmiControlManager.RESULT_SUCCESS);
      }
  
      private void finishWithCallback(int returnCode) {
          if (mCallback != null) {
              try {
                  mCallback.onComplete(returnCode);
              } catch (RemoteException e) {
                  Slog.e(TAG, "Failed to invoke callback.", e);
              }
          }
          finish();
      }
  
      @Override
      void handleTimerEvent(int state) {
          if (mState != state) {
              return;
          }
  
          handleSendGiveAudioStatusFailure();
      }
  }
  