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/*
* Copyright (C) 2021 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.camera2.impl;
import static com.android.internal.util.function.pooled.PooledLambda.obtainRunnable;
import android.hardware.camera2.CameraInjectionSession;
import android.hardware.camera2.ICameraInjectionCallback;
import android.hardware.camera2.ICameraInjectionSession;
import android.os.Binder;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import java.util.concurrent.Executor;
/**
* The class inherits CameraInjectionSession. Use CameraManager#injectCamera to instantiate.
*/
public class CameraInjectionSessionImpl extends CameraInjectionSession
implements IBinder.DeathRecipient {
private static final String TAG = "CameraInjectionSessionImpl";
private final CameraInjectionCallback mCallback = new CameraInjectionCallback();
private final CameraInjectionSession.InjectionStatusCallback mInjectionStatusCallback;
private final Executor mExecutor;
private final Object mInterfaceLock = new Object();
private ICameraInjectionSession mInjectionSession;
public CameraInjectionSessionImpl(InjectionStatusCallback callback, Executor executor) {
mInjectionStatusCallback = callback;
mExecutor = executor;
}
@Override
public void close() {
synchronized (mInterfaceLock) {
try {
if (mInjectionSession != null) {
mInjectionSession.stopInjection();
mInjectionSession.asBinder().unlinkToDeath(this, /*flags*/0);
mInjectionSession = null;
}
} catch (RemoteException e) {
// Ignore binder errors for disconnect
}
}
}
@Override
protected void finalize() throws Throwable {
try {
close();
} finally {
super.finalize();
}
}
@Override
public void binderDied() {
synchronized (mInterfaceLock) {
Log.w(TAG, "CameraInjectionSessionImpl died unexpectedly");
if (mInjectionSession == null) {
return; // CameraInjectionSession already closed
}
Runnable r = new Runnable() {
@Override
public void run() {
mInjectionStatusCallback.onInjectionError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SERVICE);
}
};
final long ident = Binder.clearCallingIdentity();
try {
CameraInjectionSessionImpl.this.mExecutor.execute(r);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
public CameraInjectionCallback getCallback() {
return mCallback;
}
/**
* Set remote injection session, which triggers initial onInjectionSucceeded callbacks.
*
* <p>This function may post onInjectionError if remoteInjectionSession dies
* during injecting.</p>
*/
public void setRemoteInjectionSession(ICameraInjectionSession injectionSession) {
synchronized (mInterfaceLock) {
if (injectionSession == null) {
Log.e(TAG, "The camera injection session has encountered a serious error");
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SESSION);
return;
}
mInjectionSession = injectionSession;
IBinder remoteSessionBinder = injectionSession.asBinder();
if (remoteSessionBinder == null) {
Log.e(TAG, "The camera injection session has encountered a serious error");
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SESSION);
return;
}
final long ident = Binder.clearCallingIdentity();
try {
remoteSessionBinder.linkToDeath(this, /*flag*/ 0);
mExecutor.execute(new Runnable() {
@Override
public void run() {
mInjectionStatusCallback
.onInjectionSucceeded(CameraInjectionSessionImpl.this);
}
});
} catch (RemoteException e) {
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SESSION);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
/**
* The method called when the injection camera has encountered a serious error.
*
* @param errorCode The error code.
* @see #ERROR_INJECTION_SESSION
* @see #ERROR_INJECTION_SERVICE
* @see #ERROR_INJECTION_UNSUPPORTED
*/
public void onInjectionError(final int errorCode) {
Log.v(TAG, String.format(
"Injection session error received, code %d", errorCode));
synchronized (mInterfaceLock) {
if (mInjectionSession == null) {
return; // mInjectionSession already closed
}
switch (errorCode) {
case CameraInjectionCallback.ERROR_INJECTION_SESSION:
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SESSION);
break;
case CameraInjectionCallback.ERROR_INJECTION_SERVICE:
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SERVICE);
break;
case CameraInjectionCallback.ERROR_INJECTION_UNSUPPORTED:
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback
.ERROR_INJECTION_UNSUPPORTED);
break;
default:
Log.e(TAG, "Unknown error from injection session: " + errorCode);
scheduleNotifyError(
CameraInjectionSession.InjectionStatusCallback.ERROR_INJECTION_SERVICE);
}
}
}
private void scheduleNotifyError(final int errorCode) {
final long ident = Binder.clearCallingIdentity();
try {
mExecutor.execute(obtainRunnable(
CameraInjectionSessionImpl::notifyError,
this, errorCode).recycleOnUse());
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private void notifyError(final int errorCode) {
if (mInjectionSession != null) {
mInjectionStatusCallback.onInjectionError(errorCode);
}
}
/**
* The class inherits ICameraInjectionCallbacks.Stub. Use CameraManager#injectCamera to
* instantiate.
*/
public class CameraInjectionCallback extends ICameraInjectionCallback.Stub {
@Override
public IBinder asBinder() {
return this;
}
@Override
public void onInjectionError(int errorCode) {
CameraInjectionSessionImpl.this.onInjectionError(errorCode);
}
}
}
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