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/*
* Copyright 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.media;
import android.annotation.NonNull;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.RemoteException;
import android.os.ResultReceiver;
import android.util.Log;
import java.util.Objects;
/**
* Handles incoming commands from {@link MediaController2} to {@link MediaSession2}.
* @hide
*/
// @SystemApi
public final class Session2Link implements Parcelable {
private static final String TAG = "Session2Link";
private static final boolean DEBUG = MediaSession2.DEBUG;
public static final Parcelable.Creator<Session2Link> CREATOR =
new Parcelable.Creator<Session2Link>() {
@Override
public Session2Link createFromParcel(Parcel in) {
return new Session2Link(in);
}
@Override
public Session2Link[] newArray(int size) {
return new Session2Link[size];
}
};
private final MediaSession2 mSession;
private final IMediaSession2 mISession;
public Session2Link(MediaSession2 session) {
mSession = session;
mISession = new Session2Stub();
}
Session2Link(Parcel in) {
mSession = null;
mISession = IMediaSession2.Stub.asInterface(in.readStrongBinder());
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeStrongBinder(mISession.asBinder());
}
@Override
public int hashCode() {
return mISession.asBinder().hashCode();
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof Session2Link)) {
return false;
}
Session2Link other = (Session2Link) obj;
return Objects.equals(mISession.asBinder(), other.mISession.asBinder());
}
/** Link to death with mISession */
public void linkToDeath(@NonNull IBinder.DeathRecipient recipient, int flags) {
if (mISession != null) {
try {
mISession.asBinder().linkToDeath(recipient, flags);
} catch (RemoteException e) {
if (DEBUG) {
Log.d(TAG, "Session died too early.", e);
}
}
}
}
/** Unlink to death with mISession */
public boolean unlinkToDeath(@NonNull IBinder.DeathRecipient recipient, int flags) {
if (mISession != null) {
return mISession.asBinder().unlinkToDeath(recipient, flags);
}
return true;
}
/** Interface method for IMediaSession2.connect */
public void connect(final Controller2Link caller, int seq, Bundle connectionRequest) {
try {
mISession.connect(caller, seq, connectionRequest);
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
/** Interface method for IMediaSession2.disconnect */
public void disconnect(final Controller2Link caller, int seq) {
try {
mISession.disconnect(caller, seq);
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
/** Interface method for IMediaSession2.sendSessionCommand */
public void sendSessionCommand(final Controller2Link caller, final int seq,
final Session2Command command, final Bundle args, ResultReceiver resultReceiver) {
try {
mISession.sendSessionCommand(caller, seq, command, args, resultReceiver);
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
/** Interface method for IMediaSession2.sendSessionCommand */
public void cancelSessionCommand(final Controller2Link caller, final int seq) {
try {
mISession.cancelSessionCommand(caller, seq);
} catch (RemoteException e) {
throw new RuntimeException(e);
}
}
/** Stub implementation for IMediaSession2.connect */
public void onConnect(final Controller2Link caller, int pid, int uid, int seq,
Bundle connectionRequest) {
mSession.onConnect(caller, pid, uid, seq, connectionRequest);
}
/** Stub implementation for IMediaSession2.disconnect */
public void onDisconnect(final Controller2Link caller, int seq) {
mSession.onDisconnect(caller, seq);
}
/** Stub implementation for IMediaSession2.sendSessionCommand */
public void onSessionCommand(final Controller2Link caller, final int seq,
final Session2Command command, final Bundle args, ResultReceiver resultReceiver) {
mSession.onSessionCommand(caller, seq, command, args, resultReceiver);
}
/** Stub implementation for IMediaSession2.cancelSessionCommand */
public void onCancelCommand(final Controller2Link caller, final int seq) {
mSession.onCancelCommand(caller, seq);
}
private class Session2Stub extends IMediaSession2.Stub {
@Override
public void connect(final Controller2Link caller, int seq, Bundle connectionRequest) {
if (caller == null || connectionRequest == null) {
return;
}
final int pid = Binder.getCallingPid();
final int uid = Binder.getCallingUid();
final long token = Binder.clearCallingIdentity();
try {
Session2Link.this.onConnect(caller, pid, uid, seq, connectionRequest);
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public void disconnect(final Controller2Link caller, int seq) {
if (caller == null) {
return;
}
final long token = Binder.clearCallingIdentity();
try {
Session2Link.this.onDisconnect(caller, seq);
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public void sendSessionCommand(final Controller2Link caller, final int seq,
final Session2Command command, final Bundle args, ResultReceiver resultReceiver) {
if (caller == null) {
return;
}
final long token = Binder.clearCallingIdentity();
try {
Session2Link.this.onSessionCommand(caller, seq, command, args, resultReceiver);
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public void cancelSessionCommand(final Controller2Link caller, final int seq) {
if (caller == null) {
return;
}
final long token = Binder.clearCallingIdentity();
try {
Session2Link.this.onCancelCommand(caller, seq);
} finally {
Binder.restoreCallingIdentity(token);
}
}
}
}
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