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 com.android.server.hdmi.HdmiControlService.SendMessageCallback; 20 21 /** 22 * Action to initiate system audio once AVR is detected on Device discovery action. 23 */ 24 // Seq #27 25 final class SystemAudioAutoInitiationAction extends HdmiCecFeatureAction { 26 private final int mAvrAddress; 27 28 // State that waits for <System Audio Mode Status> once send 29 // <Give System Audio Mode Status> to AV Receiver. 30 private static final int STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS = 1; 31 32 SystemAudioAutoInitiationAction(HdmiCecLocalDevice source, int avrAddress) { 33 super(source); 34 mAvrAddress = avrAddress; 35 } 36 37 @Override 38 boolean start() { 39 mState = STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS; 40 41 addTimer(mState, HdmiConfig.TIMEOUT_MS); 42 sendGiveSystemAudioModeStatus(); 43 return true; 44 } 45 46 private void sendGiveSystemAudioModeStatus() { 47 sendCommand(HdmiCecMessageBuilder.buildGiveSystemAudioModeStatus(getSourceAddress(), 48 mAvrAddress), new SendMessageCallback() { 49 @Override 50 public void onSendCompleted(int error) { 51 if (error != Constants.SEND_RESULT_SUCCESS) { 52 tv().setSystemAudioMode(false, true); 53 finish(); 54 } 55 } 56 }); 57 } 58 59 @Override 60 boolean processCommand(HdmiCecMessage cmd) { 61 if (mState != STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS 62 || mAvrAddress != cmd.getSource()) { 63 return false; 64 } 65 66 if (cmd.getOpcode() == Constants.MESSAGE_SYSTEM_AUDIO_MODE_STATUS) { 67 handleSystemAudioModeStatusMessage(); 68 return true; 69 } 70 return false; 71 } 72 73 private void handleSystemAudioModeStatusMessage() { 74 if (!canChangeSystemAudio()) { 75 HdmiLogger.debug("Cannot change system audio mode in auto initiation action."); 76 finish(); 77 return; 78 } 79 80 boolean systemAudioModeSetting = tv().getSystemAudioModeSetting(); 81 // Update AVR's system audio mode regardless of AVR's status. 82 addAndStartAction(new SystemAudioActionFromTv(tv(), mAvrAddress, systemAudioModeSetting, 83 null)); 84 finish(); 85 } 86 87 @Override 88 void handleTimerEvent(int state) { 89 if (mState != state) { 90 return; 91 } 92 93 switch (mState) { 94 case STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS: 95 handleSystemAudioModeStatusTimeout(); 96 break; 97 } 98 } 99 100 private void handleSystemAudioModeStatusTimeout() { 101 if (tv().getSystemAudioModeSetting()) { 102 if (canChangeSystemAudio()) { 103 addAndStartAction(new SystemAudioActionFromTv(tv(), mAvrAddress, true, null)); 104 } 105 } else { 106 tv().setSystemAudioMode(false, true); 107 } 108 finish(); 109 } 110 111 private boolean canChangeSystemAudio() { 112 return !(tv().hasAction(SystemAudioActionFromTv.class) 113 || tv().hasAction(SystemAudioActionFromAvr.class)); 114 } 115 } 116