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/*
* Copyright (C) 2018 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 android.hardware.hdmi;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.Handler;
import android.os.Looper;
import android.os.RemoteException;
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.annotations.VisibleForTesting.Visibility;
/**
* HdmiAudioSystemClient represents HDMI-CEC logical device of type Audio System in the Android
* system which acts as an audio system device such as sound bar.
*
* <p>HdmiAudioSystemClient provides methods that control, get information from TV/Display device
* connected through HDMI bus.
*
* @hide
*/
public final class HdmiAudioSystemClient extends HdmiClient {
private static final String TAG = "HdmiAudioSystemClient";
private static final int REPORT_AUDIO_STATUS_INTERVAL_MS = 500;
private final Handler mHandler;
private boolean mCanSendAudioStatus = true;
private boolean mPendingReportAudioStatus;
private int mLastVolume;
private int mLastMaxVolume;
private boolean mLastIsMute;
@VisibleForTesting(visibility = Visibility.PACKAGE)
public HdmiAudioSystemClient(IHdmiControlService service) {
this(service, null);
}
@VisibleForTesting(visibility = Visibility.PACKAGE)
public HdmiAudioSystemClient(IHdmiControlService service, @Nullable Handler handler) {
super(service);
mHandler = handler == null ? new Handler(Looper.getMainLooper()) : handler;
}
/**
* Callback interface used to get the set System Audio Mode result.
*
* @hide
*/
// TODO(b/110094868): unhide and add @SystemApi for Q
public interface SetSystemAudioModeCallback {
/**
* Called when the input was changed.
*
* @param result the result of the set System Audio Mode
*/
void onComplete(int result);
}
/** @hide */
// TODO(b/110094868): unhide and add @SystemApi for Q
@Override
public int getDeviceType() {
return HdmiDeviceInfo.DEVICE_AUDIO_SYSTEM;
}
/**
* Sends a Report Audio Status HDMI CEC command to TV devices when necessary.
*
* According to HDMI CEC specification, an audio system can report its audio status when System
* Audio Mode is on, so that the TV can display the audio status of external amplifier.
*
* @hide
*/
public void sendReportAudioStatusCecCommand(boolean isMuteAdjust, int volume, int maxVolume,
boolean isMute) {
if (isMuteAdjust) {
// always report audio status when it's muted/unmuted
try {
mService.reportAudioStatus(getDeviceType(), volume, maxVolume, isMute);
} catch (RemoteException e) {
// do nothing. Reporting audio status is optional.
}
return;
}
mLastVolume = volume;
mLastMaxVolume = maxVolume;
mLastIsMute = isMute;
if (mCanSendAudioStatus) {
try {
mService.reportAudioStatus(getDeviceType(), volume, maxVolume, isMute);
mCanSendAudioStatus = false;
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (mPendingReportAudioStatus) {
// report audio status if there is any pending message
try {
mService.reportAudioStatus(getDeviceType(), mLastVolume,
mLastMaxVolume, mLastIsMute);
mHandler.postDelayed(this, REPORT_AUDIO_STATUS_INTERVAL_MS);
} catch (RemoteException e) {
mCanSendAudioStatus = true;
} finally {
mPendingReportAudioStatus = false;
}
} else {
mCanSendAudioStatus = true;
}
}
}, REPORT_AUDIO_STATUS_INTERVAL_MS);
} catch (RemoteException e) {
// do nothing. Reporting audio status is optional.
}
} else {
// if audio status cannot be sent, send it latter
mPendingReportAudioStatus = true;
}
}
/**
* Set System Audio Mode on/off with audio system device.
*
* @param state true to set System Audio Mode on. False to set off.
* @param callback callback offer the setting result.
*
* @hide
*/
// TODO(b/110094868): unhide and add @SystemApi for Q
public void setSystemAudioMode(boolean state, @NonNull SetSystemAudioModeCallback callback) {
// TODO(amyjojo): implement this when needed.
}
/**
* When device is switching to an audio only source, this method is called to broadcast
* a setSystemAudioMode on message to the HDMI CEC system without querying Active Source or
* TV supporting System Audio Control or not. This is to get volume control passthrough
* from STB even if TV does not support it.
*
* @hide
*/
// TODO(b/110094868): unhide and add @SystemApi for Q
public void setSystemAudioModeOnForAudioOnlySource() {
try {
mService.setSystemAudioModeOnForAudioOnlySource();
} catch (RemoteException e) {
Log.d(TAG, "Failed to set System Audio Mode on for Audio Only source");
}
}
}
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