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/*
* Copyright (c) 2019, 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.car.media.testmediaapp;
import static com.android.car.media.testmediaapp.prefs.TmaEnumPrefs.TmaBrowseNodeType.LEAF_CHILDREN;
import static com.android.car.media.testmediaapp.prefs.TmaEnumPrefs.TmaBrowseNodeType.QUEUE_ONLY;
import static com.android.car.media.testmediaapp.prefs.TmaEnumPrefs.TmaLoginEventOrder.PLAYBACK_STATE_UPDATE_FIRST;
import android.content.Context;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.media.MediaBrowserCompat.MediaItem;
import android.support.v4.media.session.MediaSessionCompat;
import android.support.v4.media.session.PlaybackStateCompat;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.media.MediaBrowserServiceCompat;
import com.android.car.media.testmediaapp.loader.TmaLoader;
import com.android.car.media.testmediaapp.prefs.TmaEnumPrefs.TmaAccountType;
import com.android.car.media.testmediaapp.prefs.TmaEnumPrefs.TmaReplyDelay;
import com.android.car.media.testmediaapp.prefs.TmaPrefs;
import java.util.ArrayList;
import java.util.List;
/**
* Implementation of {@link MediaBrowserServiceCompat} that delivers {@link MediaItem}s based on
* json configuration files stored in the application's assets. Those assets combined with a few
* preferences (see: {@link TmaPrefs}), allow to create a variety of use cases (including error
* states) to stress test the Car Media application. <p/>
* The media items are cached in the {@link TmaLibrary}, and can be virtually played with
* {@link TmaPlayer}.
*/
public class TmaBrowser extends MediaBrowserServiceCompat {
private static final String MEDIA_SESSION_TAG = "TEST_MEDIA_SESSION";
private static final String ROOT_ID = "_ROOT_ID_";
private static final String SEARCH_SUPPORTED = "android.media.browse.SEARCH_SUPPORTED";
/**
* Extras key to allow Android Auto to identify the browse service from the media session.
*/
private static final String BROWSE_SERVICE_FOR_SESSION_KEY =
"android.media.session.BROWSE_SERVICE";
private TmaPrefs mPrefs;
private Handler mHandler;
private MediaSessionCompat mSession;
private TmaLibrary mLibrary;
private TmaPlayer mPlayer;
private BrowserRoot mRoot;
private String mLastLoadedNodeId;
@Override
public void onCreate() {
super.onCreate();
mPrefs = TmaPrefs.getInstance(this);
mHandler = new Handler();
mSession = new MediaSessionCompat(this, MEDIA_SESSION_TAG);
setSessionToken(mSession.getSessionToken());
mLibrary = new TmaLibrary(new TmaLoader(this));
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mPlayer = new TmaPlayer(this, mLibrary, audioManager, mHandler, mSession);
mSession.setCallback(mPlayer);
mSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
| MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
Bundle mediaSessionExtras = new Bundle();
mediaSessionExtras.putString(BROWSE_SERVICE_FOR_SESSION_KEY, TmaBrowser.class.getName());
mSession.setExtras(mediaSessionExtras);
mPrefs.mAccountType.registerChangeListener(
(oldValue, newValue) -> onAccountChanged(newValue));
mPrefs.mRootNodeType.registerChangeListener(
(oldValue, newValue) -> invalidateRoot());
mPrefs.mRootReplyDelay.registerChangeListener(
(oldValue, newValue) -> invalidateRoot());
Bundle browserRootExtras = new Bundle();
browserRootExtras.putBoolean(SEARCH_SUPPORTED, true);
mRoot = new BrowserRoot(ROOT_ID, browserRootExtras);
updatePlaybackState(mPrefs.mAccountType.getValue());
}
@Override
public void onDestroy() {
mSession.release();
mHandler = null;
mPrefs = null;
super.onDestroy();
}
private void onAccountChanged(TmaAccountType accountType) {
if (PLAYBACK_STATE_UPDATE_FIRST.equals(mPrefs.mLoginEventOrder.getValue())) {
updatePlaybackState(accountType);
invalidateRoot();
} else {
invalidateRoot();
(new Handler()).postDelayed(() -> {
updatePlaybackState(accountType);
}, 3000);
}
}
private void updatePlaybackState(TmaAccountType accountType) {
if (accountType == TmaAccountType.NONE) {
mSession.setMetadata(null);
mPlayer.onStop();
mPlayer.setPlaybackState(
new TmaMediaEvent(TmaMediaEvent.EventState.ERROR,
TmaMediaEvent.StateErrorCode.AUTHENTICATION_EXPIRED,
getResources().getString(R.string.no_account),
getResources().getString(R.string.select_account),
TmaMediaEvent.ResolutionIntent.PREFS,
TmaMediaEvent.Action.NONE, 0, null));
} else {
// TODO don't reset error in all cases...
PlaybackStateCompat.Builder playbackState = new PlaybackStateCompat.Builder();
playbackState.setState(PlaybackStateCompat.STATE_PAUSED, 0, 0);
playbackState.setActions(PlaybackStateCompat.ACTION_PREPARE);
mSession.setPlaybackState(playbackState.build());
}
}
private void invalidateRoot() {
notifyChildrenChanged(ROOT_ID);
}
@Override
public BrowserRoot onGetRoot(
@NonNull String clientPackageName, int clientUid, Bundle rootHints) {
return mRoot;
}
@Override
public void onLoadChildren(@NonNull String parentId, @NonNull Result<List<MediaItem>> result) {
mLastLoadedNodeId = parentId;
getMediaItemsWithDelay(parentId, result, null);
if (QUEUE_ONLY.equals(mPrefs.mRootNodeType.getValue()) && ROOT_ID.equals(parentId)) {
TmaMediaItem queue = mLibrary.getRoot(LEAF_CHILDREN);
if (queue != null) {
mSession.setQueue(queue.buildQueue());
mPlayer.prepareMediaItem(queue.getPlayableByIndex(0));
}
}
}
@Override
public void onSearch(final String query, final Bundle extras, Result<List<MediaItem>> result) {
getMediaItemsWithDelay(mLastLoadedNodeId, result, query);
}
private void getMediaItemsWithDelay(@NonNull String parentId,
@NonNull Result<List<MediaItem>> result, @Nullable String filter) {
// TODO: allow per item override of the delay ?
TmaReplyDelay delay = mPrefs.mRootReplyDelay.getValue();
Runnable task = () -> {
TmaMediaItem node;
if (TmaAccountType.NONE.equals(mPrefs.mAccountType.getValue())) {
node = null;
} else if (ROOT_ID.equals(parentId)) {
node = mLibrary.getRoot(mPrefs.mRootNodeType.getValue());
} else {
node = mLibrary.getMediaItemById(parentId);
}
if (node == null) {
result.sendResult(null);
} else {
List<MediaItem> items = new ArrayList<>(node.mChildren.size());
for (TmaMediaItem child : node.mChildren) {
MediaItem item = child.toMediaItem();
CharSequence title = item.getDescription().getTitle();
if (filter == null || (title != null && title.toString().contains(filter))) {
items.add(item);
}
}
result.sendResult(items);
}
};
if (delay == TmaReplyDelay.NONE) {
task.run();
} else {
result.detach();
mHandler.postDelayed(task, delay.mReplyDelayMs);
}
}
}
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