/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.hdmi;
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import android.hardware.tv.cec.V1_0.SendMessageResult;
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import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
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/**
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* Action to initiate system audio once AVR is detected on Device discovery action.
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*/
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// Seq #27
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final class SystemAudioAutoInitiationAction extends HdmiCecFeatureAction {
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private final int mAvrAddress;
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// State that waits for <System Audio Mode Status> once send
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// <Give System Audio Mode Status> to AV Receiver.
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private static final int STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS = 1;
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SystemAudioAutoInitiationAction(HdmiCecLocalDevice source, int avrAddress) {
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super(source);
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mAvrAddress = avrAddress;
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}
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@Override
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boolean start() {
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mState = STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS;
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addTimer(mState, HdmiConfig.TIMEOUT_MS);
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sendGiveSystemAudioModeStatus();
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return true;
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}
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private void sendGiveSystemAudioModeStatus() {
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sendCommand(HdmiCecMessageBuilder.buildGiveSystemAudioModeStatus(getSourceAddress(),
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mAvrAddress), new SendMessageCallback() {
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@Override
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public void onSendCompleted(int error) {
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if (error != SendMessageResult.SUCCESS) {
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handleSystemAudioModeStatusTimeout();
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}
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}
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});
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}
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@Override
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boolean processCommand(HdmiCecMessage cmd) {
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if (mState != STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS
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|| mAvrAddress != cmd.getSource()) {
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return false;
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}
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if (cmd.getOpcode() == Constants.MESSAGE_SYSTEM_AUDIO_MODE_STATUS) {
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handleSystemAudioModeStatusMessage(HdmiUtils.parseCommandParamSystemAudioStatus(cmd));
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return true;
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}
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return false;
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}
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private void handleSystemAudioModeStatusMessage(boolean currentSystemAudioMode) {
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if (!canChangeSystemAudio()) {
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HdmiLogger.debug("Cannot change system audio mode in auto initiation action.");
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finish();
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return;
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}
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// If System Audio Control feature is enabled, turn on system audio mode when new AVR is
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// detected. Otherwise, turn off system audio mode.
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boolean targetSystemAudioMode = tv().isSystemAudioControlFeatureEnabled();
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if (currentSystemAudioMode != targetSystemAudioMode) {
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// Start System Audio Control feature actions only if necessary.
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addAndStartAction(
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new SystemAudioActionFromTv(tv(), mAvrAddress, targetSystemAudioMode, null));
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} else {
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// If AVR already has correct system audio mode, update target system audio mode
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// immediately rather than starting feature action.
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tv().setSystemAudioMode(targetSystemAudioMode);
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}
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finish();
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}
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@Override
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void handleTimerEvent(int state) {
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if (mState != state) {
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return;
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}
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switch (mState) {
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case STATE_WAITING_FOR_SYSTEM_AUDIO_MODE_STATUS:
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handleSystemAudioModeStatusTimeout();
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break;
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}
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}
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private void handleSystemAudioModeStatusTimeout() {
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if (!canChangeSystemAudio()) {
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HdmiLogger.debug("Cannot change system audio mode in auto initiation action.");
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finish();
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return;
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}
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// If we can't get the current system audio mode status, just try to turn on/off system
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// audio mode according to the system audio control setting.
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addAndStartAction(new SystemAudioActionFromTv(tv(), mAvrAddress,
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tv().isSystemAudioControlFeatureEnabled(), null));
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finish();
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}
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private boolean canChangeSystemAudio() {
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return !(tv().hasAction(SystemAudioActionFromTv.class)
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|| tv().hasAction(SystemAudioActionFromAvr.class));
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}
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}
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