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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server.hdmi;
     18 
     19 import android.annotation.Nullable;
     20 import android.hardware.hdmi.HdmiControlManager;
     21 import android.hardware.hdmi.IHdmiControlCallback;
     22 import android.os.RemoteException;
     23 import android.util.Slog;
     24 
     25 import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
     26 
     27 /**
     28  * Action to update audio status (volume or mute) of audio amplifier
     29  */
     30 final class SystemAudioStatusAction extends HdmiCecFeatureAction {
     31     private static final String TAG = "SystemAudioStatusAction";
     32 
     33     // State that waits for <ReportAudioStatus>.
     34     private static final int STATE_WAIT_FOR_REPORT_AUDIO_STATUS = 1;
     35 
     36     private final int mAvrAddress;
     37     @Nullable private final IHdmiControlCallback mCallback;
     38 
     39     SystemAudioStatusAction(HdmiCecLocalDevice source, int avrAddress,
     40             IHdmiControlCallback callback) {
     41         super(source);
     42         mAvrAddress = avrAddress;
     43         mCallback = callback;
     44     }
     45 
     46     @Override
     47     boolean start() {
     48         mState = STATE_WAIT_FOR_REPORT_AUDIO_STATUS;
     49         addTimer(mState, HdmiConfig.TIMEOUT_MS);
     50         sendGiveAudioStatus();
     51         return true;
     52     }
     53 
     54     private void sendGiveAudioStatus() {
     55         sendCommand(HdmiCecMessageBuilder.buildGiveAudioStatus(getSourceAddress(), mAvrAddress),
     56                 new SendMessageCallback() {
     57             @Override
     58             public void onSendCompleted(int error) {
     59                 if (error != Constants.SEND_RESULT_SUCCESS) {
     60                     handleSendGiveAudioStatusFailure();
     61                 }
     62             }
     63         });
     64     }
     65 
     66     private void handleSendGiveAudioStatusFailure() {
     67         // Inform to all application that the audio status (volumn, mute) of
     68         // the audio amplifier is unknown.
     69         tv().setAudioStatus(false, Constants.UNKNOWN_VOLUME);
     70 
     71         int uiCommand = tv().isSystemAudioActivated()
     72                 ? HdmiCecKeycode.CEC_KEYCODE_RESTORE_VOLUME_FUNCTION  // SystemAudioMode: ON
     73                 : HdmiCecKeycode.CEC_KEYCODE_MUTE_FUNCTION;           // SystemAudioMode: OFF
     74         sendUserControlPressedAndReleased(mAvrAddress, uiCommand);
     75 
     76         // Still return SUCCESS to callback.
     77         finishWithCallback(HdmiControlManager.RESULT_SUCCESS);
     78     }
     79 
     80     @Override
     81     boolean processCommand(HdmiCecMessage cmd) {
     82         if (mState != STATE_WAIT_FOR_REPORT_AUDIO_STATUS || mAvrAddress != cmd.getSource()) {
     83             return false;
     84         }
     85 
     86         switch (cmd.getOpcode()) {
     87             case Constants.MESSAGE_REPORT_AUDIO_STATUS:
     88                 handleReportAudioStatus(cmd);
     89                 return true;
     90         }
     91 
     92         return false;
     93     }
     94 
     95     private void handleReportAudioStatus(HdmiCecMessage cmd) {
     96         byte[] params = cmd.getParams();
     97         boolean mute = (params[0] & 0x80) == 0x80;
     98         int volume = params[0] & 0x7F;
     99         tv().setAudioStatus(mute, volume);
    100 
    101         if (!(tv().isSystemAudioActivated() ^ mute)) {
    102             // Toggle AVR's mute status to match with the system audio status.
    103             sendUserControlPressedAndReleased(mAvrAddress, HdmiCecKeycode.CEC_KEYCODE_MUTE);
    104         }
    105         finishWithCallback(HdmiControlManager.RESULT_SUCCESS);
    106     }
    107 
    108     private void finishWithCallback(int returnCode) {
    109         if (mCallback != null) {
    110             try {
    111                 mCallback.onComplete(returnCode);
    112             } catch (RemoteException e) {
    113                 Slog.e(TAG, "Failed to invoke callback.", e);
    114             }
    115         }
    116         finish();
    117     }
    118 
    119     @Override
    120     void handleTimerEvent(int state) {
    121         if (mState != state) {
    122             return;
    123         }
    124 
    125         handleSendGiveAudioStatusFailure();
    126     }
    127 }
    128