TIAF: Create TIAF components and session classes

Bug: 202869203
Test: mmm
Change-Id: I0f892eadb98f37121f66bd8aadd497964ea17bc6

media/java/android/media/tv/interactive/ITvIAppManager.aidl

@@ -0,0 +1,25 @@
+/*
+ * 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.media.tv.interactive;
+
+/**
+ * Interface to the TV interactive app service.
+ * @hide
+ */
+interface ITvIAppManager {
+    void startIApp(in IBinder sessionToken, int userId);
+}

media/java/android/media/tv/interactive/ITvIAppSession.aidl

@@ -0,0 +1,25 @@
+/*
+ * 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.media.tv.interactive;
+
+/**
+ * Sub-interface of ITvIAppService which is created per session and has its own context.
+ * @hide
+ */
+oneway interface ITvIAppSession {
+    void startIApp();
+}

media/java/android/media/tv/interactive/TvIAppManager.java

@@ -0,0 +1,67 @@
+/*
+ * 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.media.tv.interactive;
+
+import android.annotation.SystemService;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+/**
+ * Central system API to the overall TV interactive application framework (TIAF) architecture, which
+ * arbitrates interaction between applications and interactive apps.
+ * @hide
+ */
+@SystemService("tv_interactive_app")
+public final class TvIAppManager {
+    private static final String TAG = "TvIAppManager";
+
+    private final ITvIAppManager mService;
+    private final int mUserId;
+
+    public TvIAppManager(ITvIAppManager service, int userId) {
+        mService = service;
+        mUserId = userId;
+    }
+
+    /**
+     * The Session provides the per-session functionality of interactive app.
+     */
+    public static final class Session {
+        private final IBinder mToken;
+        private final ITvIAppManager mService;
+        private final int mUserId;
+
+        private Session(IBinder token, ITvIAppManager service, int userId) {
+            mToken = token;
+            mService = service;
+            mUserId = userId;
+        }
+
+        void startIApp() {
+            if (mToken == null) {
+                Log.w(TAG, "The session has been already released");
+                return;
+            }
+            try {
+                mService.startIApp(mToken, mUserId);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+        }
+    }
+}

media/java/android/media/tv/interactive/TvIAppService.java

@@ -0,0 +1,60 @@
+/*
+ * 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.media.tv.interactive;
+
+import android.app.Service;
+import android.view.KeyEvent;
+
+/**
+ * The TvIAppService class represents a TV interactive applications RTE.
+ * @hide
+ */
+public abstract class TvIAppService extends Service {
+    private static final boolean DEBUG = false;
+    private static final String TAG = "TvIAppService";
+
+    /**
+     * Base class for derived classes to implement to provide a TV interactive app session.
+     */
+    public abstract static class Session implements KeyEvent.Callback {
+        /**
+         * Starts TvIAppService session.
+         */
+        public void onStartIApp() {
+        }
+
+        void startIApp() {
+            onStartIApp();
+        }
+    }
+
+    /**
+     * Implements the internal ITvIAppSession interface.
+     */
+    public static class ITvIAppSessionWrapper extends ITvIAppSession.Stub {
+        private final Session mSessionImpl;
+
+        public ITvIAppSessionWrapper(Session mSessionImpl) {
+            this.mSessionImpl = mSessionImpl;
+        }
+
+        @Override
+        public void startIApp() {
+            mSessionImpl.startIApp();
+        }
+    }
+}

media/java/android/media/tv/interactive/TvIAppView.java

@@ -0,0 +1,57 @@
+/*
+ * 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.media.tv.interactive;
+
+import android.content.Context;
+import android.util.Log;
+import android.view.ViewGroup;
+
+/**
+ * Displays contents of interactive TV applications.
+ * @hide
+ */
+public class TvIAppView extends ViewGroup {
+    private static final String TAG = "TvIAppView";
+    private static final boolean DEBUG = false;
+
+    // TODO: create session
+    private TvIAppManager.Session mSession;
+
+    public TvIAppView(Context context) {
+        super(context, /* attrs = */null, /* defStyleAttr = */0);
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        if (DEBUG) {
+            Log.d(TAG,
+                    "onLayout (left=" + l + ", top=" + t + ", right=" + r + ", bottom=" + b + ",)");
+        }
+    }
+
+    /**
+     * Starts the interactive application.
+     */
+    public void startIApp() {
+        if (DEBUG) {
+            Log.d(TAG, "start");
+        }
+        if (mSession != null) {
+            mSession.startIApp();
+        }
+    }
+}

services/core/java/com/android/server/tv/interactive/TvIAppManagerService.java

@@ -0,0 +1,91 @@
+/*
+ * 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 com.android.server.tv.interactive;
+
+import android.content.Context;
+import android.media.tv.interactive.ITvIAppManager;
+import android.media.tv.interactive.ITvIAppSession;
+import android.os.IBinder;
+import android.os.RemoteException;
+
+import com.android.server.SystemService;
+import com.android.server.utils.Slogf;
+
+/**
+ * This class provides a system service that manages interactive TV applications.
+ */
+public class TvIAppManagerService extends SystemService {
+    private static final boolean DEBUG = false;
+    private static final String TAG = "TvIAppManagerService";
+
+    /**
+     * Initializes the system service.
+     * <p>
+     * Subclasses must define a single argument constructor that accepts the context
+     * and passes it to super.
+     * </p>
+     *
+     * @param context The system server context.
+     */
+    public TvIAppManagerService(Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onStart() {
+        if (DEBUG) {
+            Slogf.d(TAG, "onStart");
+        }
+        // TODO: make service name a constant in Context
+        publishBinderService("tv_interactive_app", new BinderService());
+    }
+
+    private SessionState getSessionState(IBinder sessionToken) {
+        // TODO: implement user state and get session from it.
+        return null;
+    }
+
+    private final class BinderService extends ITvIAppManager.Stub {
+        @Override
+        public void startIApp(IBinder sessionToken, int userId) {
+            if (DEBUG) {
+                Slogf.d(TAG, "BinderService#start(userId=%d)", userId);
+            }
+            try {
+                SessionState sessionState = getSessionState(sessionToken);
+                if (sessionState != null && sessionState.mSession != null) {
+                    sessionState.mSession.startIApp();
+                }
+            } catch (RemoteException e) {
+                Slogf.e(TAG, "error in start", e);
+            }
+        }
+    }
+
+    private final class SessionState implements IBinder.DeathRecipient {
+        private final IBinder mSessionToken;
+        private ITvIAppSession mSession;
+
+        private SessionState(IBinder sessionToken) {
+            mSessionToken = sessionToken;
+        }
+
+        @Override
+        public void binderDied() {
+        }
+    }
+}