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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.media;
import android.media.MediaCrypto;
import android.os.Build;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import java.util.ArrayList;
final class RemoteMediaDrmBridgeStub extends IMediaDrmBridge.Stub
implements IBinder.DeathRecipient {
private static final String LOGTAG = "RemoteDrmBridgeStub";
private static final boolean DEBUG = false;
private volatile IMediaDrmBridgeCallbacks mCallbacks = null;
// Underlying bridge implmenetaion, i.e. GeckoMediaDrmBrdigeV21.
private GeckoMediaDrm mBridge = null;
// mStubId is initialized during stub construction. It should be a unique
// string which is generated in MediaDrmProxy in Fennec App process and is
// used for Codec to obtain corresponding MediaCrypto as input to achieve
// decryption.
// The generated stubId will be delivered to Codec via a code path starting
// from MediaDrmProxy -> MediaDrmCDMProxy -> RemoteDataDecoder => IPC => Codec.
private String mStubId = "";
public static final ArrayList<RemoteMediaDrmBridgeStub> mBridgeStubs =
new ArrayList<RemoteMediaDrmBridgeStub>();
private String getId() {
return mStubId;
}
private MediaCrypto getMediaCryptoFromBridge() {
return mBridge != null ? mBridge.getMediaCrypto() : null;
}
public static synchronized MediaCrypto getMediaCrypto(final String stubId) {
if (DEBUG) Log.d(LOGTAG, "getMediaCrypto()");
for (int i = 0; i < mBridgeStubs.size(); i++) {
if (mBridgeStubs.get(i) != null && mBridgeStubs.get(i).getId().equals(stubId)) {
return mBridgeStubs.get(i).getMediaCryptoFromBridge();
}
}
return null;
}
// Callback to RemoteMediaDrmBridge.
private final class Callbacks implements GeckoMediaDrm.Callbacks {
private IMediaDrmBridgeCallbacks mRemoteCallbacks;
public Callbacks(final IMediaDrmBridgeCallbacks remote) {
mRemoteCallbacks = remote;
}
@Override
public void onSessionCreated(
final int createSessionToken,
final int promiseId,
final byte[] sessionId,
final byte[] request) {
if (DEBUG) Log.d(LOGTAG, "onSessionCreated()");
try {
mRemoteCallbacks.onSessionCreated(createSessionToken, promiseId, sessionId, request);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onSessionUpdated(final int promiseId, final byte[] sessionId) {
if (DEBUG) Log.d(LOGTAG, "onSessionUpdated()");
try {
mRemoteCallbacks.onSessionUpdated(promiseId, sessionId);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onSessionClosed(final int promiseId, final byte[] sessionId) {
if (DEBUG) Log.d(LOGTAG, "onSessionClosed()");
try {
mRemoteCallbacks.onSessionClosed(promiseId, sessionId);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onSessionMessage(
final byte[] sessionId, final int sessionMessageType, final byte[] request) {
if (DEBUG) Log.d(LOGTAG, "onSessionMessage()");
try {
mRemoteCallbacks.onSessionMessage(sessionId, sessionMessageType, request);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onSessionError(final byte[] sessionId, final String message) {
if (DEBUG) Log.d(LOGTAG, "onSessionError()");
try {
mRemoteCallbacks.onSessionError(sessionId, message);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onSessionBatchedKeyChanged(
final byte[] sessionId, final SessionKeyInfo[] keyInfos) {
if (DEBUG) Log.d(LOGTAG, "onSessionBatchedKeyChanged()");
try {
mRemoteCallbacks.onSessionBatchedKeyChanged(sessionId, keyInfos);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public void onRejectPromise(final int promiseId, final String message) {
if (DEBUG) Log.d(LOGTAG, "onRejectPromise()");
try {
mRemoteCallbacks.onRejectPromise(promiseId, message);
} catch (final RemoteException e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
}
/* package-private */ void assertTrue(final boolean condition) {
if (DEBUG && !condition) {
throw new AssertionError("Expected condition to be true");
}
}
RemoteMediaDrmBridgeStub(final String keySystem, final String stubId) throws RemoteException {
if (Build.VERSION.SDK_INT < 21) {
Log.e(LOGTAG, "Pre-Lollipop should never enter here!!");
throw new RemoteException("Error, unsupported version!");
}
try {
if (Build.VERSION.SDK_INT < 23) {
mBridge = new GeckoMediaDrmBridgeV21(keySystem);
} else {
mBridge = new GeckoMediaDrmBridgeV23(keySystem);
}
mStubId = stubId;
mBridgeStubs.add(this);
} catch (final Exception e) {
throw new RemoteException("RemoteMediaDrmBridgeStub cannot create bridge implementation.");
}
}
@Override
public synchronized void setCallbacks(final IMediaDrmBridgeCallbacks callbacks)
throws RemoteException {
if (DEBUG) Log.d(LOGTAG, "setCallbacks()");
assertTrue(mBridge != null);
assertTrue(callbacks != null);
mCallbacks = callbacks;
callbacks.asBinder().linkToDeath(this, 0);
mBridge.setCallbacks(new Callbacks(mCallbacks));
}
@Override
public synchronized void createSession(
final int createSessionToken,
final int promiseId,
final String initDataType,
final byte[] initData)
throws RemoteException {
if (DEBUG) Log.d(LOGTAG, "createSession()");
try {
assertTrue(mCallbacks != null);
assertTrue(mBridge != null);
mBridge.createSession(createSessionToken, promiseId, initDataType, initData);
} catch (final Exception e) {
Log.e(LOGTAG, "Failed to createSession.", e);
mCallbacks.onRejectPromise(promiseId, "Failed to createSession.");
}
}
@Override
public synchronized void updateSession(
final int promiseId, final String sessionId, final byte[] response) throws RemoteException {
if (DEBUG) Log.d(LOGTAG, "updateSession()");
try {
assertTrue(mCallbacks != null);
assertTrue(mBridge != null);
mBridge.updateSession(promiseId, sessionId, response);
} catch (final Exception e) {
Log.e(LOGTAG, "Failed to updateSession.", e);
mCallbacks.onRejectPromise(promiseId, "Failed to updateSession.");
}
}
@Override
public synchronized void closeSession(final int promiseId, final String sessionId)
throws RemoteException {
if (DEBUG) Log.d(LOGTAG, "closeSession()");
try {
assertTrue(mCallbacks != null);
assertTrue(mBridge != null);
mBridge.closeSession(promiseId, sessionId);
} catch (final Exception e) {
Log.e(LOGTAG, "Failed to closeSession.", e);
mCallbacks.onRejectPromise(promiseId, "Failed to closeSession.");
}
}
// IBinder.DeathRecipient
@Override
public synchronized void binderDied() {
Log.e(LOGTAG, "Binder died !!");
try {
release();
} catch (final Exception e) {
Log.e(LOGTAG, "Exception ! Dead recipient !!", e);
}
}
@Override
public synchronized void release() {
if (DEBUG) Log.d(LOGTAG, "release()");
mBridgeStubs.remove(this);
if (mBridge != null) {
mBridge.release();
mBridge = null;
}
mCallbacks.asBinder().unlinkToDeath(this, 0);
mCallbacks = null;
mStubId = "";
}
@Override
public synchronized void setServerCertificate(final byte[] cert) {
try {
mBridge.setServerCertificate(cert);
} catch (final IllegalStateException e) {
Log.e(LOGTAG, "Failed to setServerCertificate.", e);
throw e;
}
}
}
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