# Extensions and Plugins

## Subtitles and Closed Captions

The PRESTOplay SDK for Android comes with two plugins that support subtitles and closed captions. The default plugin leverages the ExoPlayer subtitles parser and renderer. In addition, the PRESTOplay SDK for Android bundles the castLabs subtitles plugins, that offers full support for FCC requirements and an extended TTML renderer that provides styling.

In order to use the castLabs subtitles plugin, you need to add it as a dependency to your application, and register the plugin with the SDK:

    dependencies {
        ...
        compile 'com.castlabs.player:subtitles-plugin:4.3.2'
        ...
    }

The example above will add the dependency to you build file. You then need to register the plugin to enable it:

    PlayerSDK.register(new SubtitlesPlugin());
    PlayerSDK.init(getApplicationContext());

Both, the ExoPlayer as well as the castLabs subtitles plugin style can be configured through the `PlayerContorller`. For that, you will need to create a `SubtitlesStyle` that can be passed to the controller. The style can also be loaded from the system settings and the `Builder` that creates the style provides the necessary methods to be initialized from the system settings. Please note that only since Android API version 21, all required FCC settings can be set on a system level.

### Subtitle FCC Fonts

To fulfill the FCC requirements for closed captions, you need to allow the user to select from different fonts, including “casual”, “cursive”, “small capitals”, and a “serif monospace” font. These fonts are not available on all Android devices. The PRESTOplay SDK for Android bundles a module that offers a set of fonts to fill the gap. You can add the module to your dependencies:

    dependencies{
        ...
        compile 'com.castlabs.player:subtitles-fonts:4.3.2'
        ...
    }

This will bundle the missing font types with your Application. You can also add different fonts yourself and use the `SubtitleFonts` class to configure the fonts.

### Subtitle Styles

The PRESTOplay SDK for Android contains an example Application subtitle_styles that demonstrates who you can build a settings view to configure subtitles, store that configuration in the shared preferences of the Application and then create a `SubtitlesStyle` object from these preferences and use it during playback.

### Subtitle Preview

One of the FCC requirements is that you provide a preview when different caption styles are applied. The PRESTOplay SDK for Android contains a View component, `SubtitlesPreviewView`, that can be used to render a preview of the subtitles with a given style.

### Subtitles View

The PRESTOplay SDK for Android uses the SubtitlesView in order to display rendered subtitles.

If you’re using a `PlayerView`, a `SubtitlesView` will automatically be created and added to such `PlayerView`.

If you are not using a `PlayerView`. You can create a `SubtitlesView` programmatically just by using its constructor, or by declaring one in a layout xml file for the system to inflate. If you use the latest approach, you must pass your layout View to `PlayerController.setComponentView(int, android.view.View)` with the corresponding id, defined in `SUBTITLES_VIEW_ID`, or `R.id.presto_castlabs_subtitles_view` so the `SubtitlesPlugin` can properly find the `SubtitlesView`.

You can get a reference to this underlying View in two different ways.

You can use get it from the `PlayerController`, with its `PlayerController.getComponentView(int)` method, again making use of the `SUBTITLES_VIEW_ID`.

If you’re using a `PlayerView` there’s also the option of using the `SubtitlesViewComponent`, and then getting the view from it through the `getView()` method.

## Recovering From Loss Of Connectivity

By default, the PRESTOplay SDK for Android will not check specifically for loss of connectivity and if a device looses its internet connection during playback, fatal player errors will be raises. With version 3.1.2, we introduced a new mechanism to enable the player to recover automatically from connectivity loss without fatal errors being raised. You will need to enable that feature explicitly before you initialize the SDK:

    PlayerSDK.ENABLE_CONNECTIVITY_CHECKS = true;

If the feature is enabled, the player will catch download errors internally and check for network connectivity. If no internet connection is available, a `CastlabsPlayerException` will be passed to any registered PlayerListener instances. The type of the error will be `TYPE_CONNECTIVITY_LOST_ERROR`, which indicates that a download error occurred due to lack of connectivity. The PRESTOplay SDK for Android will then register a broadcast listener and wait for connectivity changes. During that period, the player might run out of buffered data and will go into Buffering state. Once device connectivity changes, the playback will be resumed automatically and a `TYPE_CONNECTIVITY_GAINED_INFO` error will be raised through all registered listeners. This error is not severe and serves only informational purpose. For more information about error handling and how to add a listener see Error Handling.

If you are implementing a user interface component to inform the user of the loss of connectivity, you might want to consider waiting until the player goes into buffering state after you observed the `TYPE_CONNECTIVITY_LOST_ERROR` error. If the connectivity loss is short enough and the buffers contain enough data, the player might actually recover silently from such interruptions.

### Handling Connectivity Loss for Live Playback

In case connectivity loss detection is enabled and you are playing live content, you might need to manually re-start playback if the connection loss was too long and the playback head moved behind the current live Window. In that case the player will raise a `TYPE_BEHIND_LIVE_WINDOW` error, which can be used as a marker for these situations. A possible re-start might look like this:

    @Override
    public void onError(@NonNull CastlabsPlayerException error) {
        // restart playback for live streams that fell behind the live
        // window.
        if (error.getType() == CastlabsPlayerException.TYPE_BEHIND_LIVE_WINDOW) {
            // Save the current playback state to a bundle
            Bundle store = new Bundle();
            controller.saveState(store);

            // release the player and re-open it with the bundle
            controller.release();
            try {
                controller.open(store);
            } catch (Exception e) {
                Log.e(TAG, "Error re-opening stream: " + e, e);
            }
        }
    }

### Customize Connectivity Check

The PRESTOplay SDK for Android uses its default `DefaultConnectivityCheck` to check if the device is currently connected to the internet. The default implementation does used the Android `ConnectivityManager` to check basic connectivity and then ensures that an internet connection is available by doing a DNS host name lookup to google.com. You can customize the checker implementation using the global `PlayerSDK#CONNECTIVITY_CHECKER` setting. You can either set this to a custom implementation of the `ConnectivityCheck` interface, or use a custom instance of the `DefaultConnectivityCheck` with a customized host lookup name.

Please note that the default implementation does not actually open a connection to google.com (or any other lookup host) but does connect to the DNS service of the device to perform a host lookup for the given name.

## Offline Keys

The PRESTOplay SDK for Android allows you to store offline keys for some DRM systems. If you want to leverage this feature, you will need to enable it by setting a unique identifier as the offline ID in the `DrmConfiguration` (see Offline Key Storage).

Once the license is loaded, the offline ID will be used to store a reference to the key, the so called “keySetId”, on the device. Note that this is not the actual decryption key, but an identifier used by the DRM system to find and load the key later. This “keySetId” needs to be stored and the SDK does this using an implementation of the `KeyStore` interface. The default implementation is using your application’s shared preferences in private mode to store a mapping from your offline ID to the “keySetId”.

You can, however use a custom implementation of the `KeyStore`. The store can be configured globally using the `PlayerSDK.DEFAULT_KEY_STORE` field. You can also set it explicitly for a given `PlayerController`.

### Key info

You can get Key related info through the `KeyStore` interface. You can get the currently used `KeyStore` instance with the static `PlayerSDK#DEFAULT_KEY_STORE` field.

Providing the offlineId of your content, you can get an instance of `DrmKeyStorage` with `KeyStore` ‘s `get` method.

The `DrmKeyStorage` object provides DRM-related for a particular key. You can use this for instance to get the `expiration date`.

## Interactive Media Ads (IMA)

The PRESTOplay SDK for Android provides with IMA service including Dynamic Ads Insertion (DAI) integrated in the form of plugin. Any VAST-compliant ad server is supported.

IMA plugin needs to be registered and enabled by the app. Optionally the plugin can be initialized with the custom `ImaSdkSettings` e.g. in order to change the default ads UI language:

    ImaPlugin imaPlugin = new ImaPlugin();
    imaPlugin.setEnabled(true);

    // (Optional) Set the IMA SDK settings
    ImaSdkSettings imaSdkSettings = ImaSdkFactory.getInstance().createImaSdkSettings();
    imaSdkSettings.setLanguage("en");
    imaPlugin.setImaSdkSettings(imaSdkSettings);

    PlayerSDK.register(imaPlugin);

    ..
    // (Optional) Update the IMA settings run-time e.g. on a stream basis
    ImaPlugin imaPlugin = PlayerSDK.getPlugin(ImaPlugin.class);
    if (imaPlugin != null) {
        ImaSdkSettings imaSdkSettings = imaPlugin.getImaSdkSettings();
        if (imaSdkSettings != null) {
            imaSdkSettings.setLanguage("fr");
            imaPlugin.setImaSdkSettings(imaSdkSettings);
        }
    }

The `PlayerController` expects either `ImaAdRequest` or `ImaStreamRequest` when opening content video from Bundle (Starting Playback from an Intent) or `PlayerConfig` (Starting Playback from a PlayerConfig).

    // IMA:
    intent.putExtra(SdkConsts.INTENT_ADVERTS_DATA, new ImaAdRequest("https://ima.mydomain/request1").toAdRequest());

    // IMA DAI:
    // note that specifying content type is mandatory
    intent.putExtra(SdkConsts.INTENT_ADVERTS_DATA, new ImaStreamRequest("ContentSourceId", "VideoId", "ApiKey").toAdRequest());
    intent.putExtra(SdkConsts.INTENT_CONTENT_TYPE, SdkConsts.CONTENT_TYPE_DASH)

As a result, the PRESTOplay SDK for Android requests the ads, starts the ads playback according to the ads schedule and pauses the content video playback. After the ad is completed the content video playback is resumed automatically.

Additionally the application may need to be notified when the ad starts and completes. For instance, it may disable the user content video playback controls or hide them during the ads playback. In this case the application installs the listener as follows:

    PlayerView playerView;
    ...
    playerView.getPlayerController().getAdInterface().addAdListener(new AdInterface.Listener() {
        @Override
        public void onAdStarted(@NonNull Ad ad) {
            Log.d(TAG, "Ad started : " + ad.id + ", position = " + ad.position);
            // May hide controls and disable touch event triggers
        }

        @Override
        public void onAdCompleted() {
            Log.d(TAG, "Ad completed");
            // May show the controls again if we keep them on screen
        }

        @Override
        public void onAdPlaybackPositionChanged(long playbackPositionMs) {
        }
    });

### Custom ad UI

The PRESTOplay SDK for Android allows you to build your own ad UI. For this, you’ll need to hook up to the relevant ad events, and hide the default ad provider UI. Additionally, an `AdApi` is provided so that ad-related operations can be invoked. Please note for the IMA Ad Provider the SDK requires the following Tag in the VAST response for Custom UI to be useable. Once this is available you may check whether the Default AdProvider UI has been disabled using `currentAd.isUiDisabled`.

    <Extension type="uiSettings">
        <UiHideable>1</UiHideable>
    </Extension>

This is how a basic implementation could look:

    protected void onCreate() {
        // ...
        customAdUi = new CustomAdUi(playerView.getAdInterface().getAdApi());
        ImaAdRequest adReq = new ImaAdRequest.Builder().tagUrl("<url>")
        // This is a NO-OP in case VAST responses do not have the hideable tag set
                                                                .disableDefaultAdUi(true).get()
                                                                .toAdRequest());
    }

    protected void onStart() {
        // ...
        playerView.getAdInterface().addAdListener(customAdUi);
    }

    protected void onStop() {
        // ...
        playerView.getAdInterface().removeAdListener(customAdUi)
    }

The `CustomAdUi` class would implement the `AdInterface.Listener` interface:

    class CustomAdUi implements AdInterface.Listener {
        private AdApi api;
        private Button skipButton;

        CustomAdUi(AdApi adApi) {
            this.api = adApi;
            // Create Views
            // ...
            skipButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    adApi.skipAd();
                }
            });
        }

        @Override
        public void onAdStarted(@NonNull Ad ad) {
            // Show UI
        }

        @Override
        public void onAdCompleted() {
            // Hide UI
        }

        @Override
        public void onAdPlaybackPositionChanged(long playbackPositionMs) {
            // Update UI
        }
    }

### Manual ad Scheduling

The PRESTOplay SDK for Android, when using the IMA Plugin, allows for manual ad scheduling. This enables the user to perform ad requests without the need to inform them on playback start, but rather after playback has already started.

In order to enable this capability, it must be first enabled in the `PlayerConfig` or in the `Bundle` used to start playback.

The `AdSchedule` configuration object should be built using the `manual` value for the `scheduleType`. Alternatively, you can use the `AD_SCHEDULE_MANUAL` constant.

    // Example with Bundle
    Bundle bundle = new Bundle();
    bundle.putString(SdkConsts.INTENT_URL, "http://example.com/manifest.mpd");
    bundle.putParcelable(SdkConsts.INTENT_AD_SCHEDULE, SdkConsts.AD_SCHEDULE_MANUAL);
    // ...
    playerController.open(bundle);

    // Example with PlayerConfig
    PlayerConfig playerConfig = new PlayerConfig.Builder("http://example.com/manifest.mpd")
        .adSchedule(SdkConsts.AD_SCHEDULE_MANUAL)
        // ...
        .get();
    playerController.open(playerConfig);

In order to perform ad requests, you need to get a reference to the `AdInterface`.

    playerController.getAdInterface().scheduleAd(new ImaAdRequest(adTag).toAdRequest());

By default, ads will be scheduled to be played 1.5 seconds after the response has been received. This is in order to provide a smooth transition into the ad and avoid running in a buffer underrun.

Note

This delay is not intended to schedule ads in advance. The IMA SDK expects the ad to be played shortly after the ad response, and it may completely drop the ad and skip its playback if the delay is too big. For this reason, this value is limited to 5 seconds.

The can be configured on a per-request basis as follows:

    playerController.getAdInterface().scheduleAd(new ImaAdRequest.Builder()
                                    .tagUrl(adTag)
                                    .scheduleDelayMs(4000)
                                .get()
                                .toAdRequest());

Note that there are some limitations when it comes to manual ad scheduling:

> - No ads can be scheduled while already playing an ad.

> - Only VAST ads may be requested. If a VMAP is scheduled, it will be ignored.

> - Already scheduled ads, for instance, with a VMAP AdRequest informed on playback start, will be dropped if an another request is performed.

## Downloader

The downloader plugin of the PRESTOplay SDK for Android allows the content to be downloaded and played back offline later on. Currently, the DASH, Smooth Streaming and MP4 content types are supported for the download.

In order to use the Downloader plugin you must show a persistent notification, as it is a foreground service. This is achieved through the `DownloadNotificationProvider` abstract class.

First, the application needs to register the downloader plugin prior to PRESTOplay SDK for Android initialization:

    PlayerSDK.register(new DownloaderPlugin(notificationProvider));
    PlayerSDK.init(getApplicationContext());

Please note that by default the downloader will permit 10 parallel segment downloads. You can configure this number in the DownloaderPlugin constructor, for example:

    PlayerSDK.register(new DownloaderPlugin(notificationProvider, 5));
    PlayerSDK.init(getApplicationContext());

The downloader is a foreground service and the applications need to use `DownloadServiceBinder` in order to gain access to the downloader:

    DownloadServiceBinder downloadServiceBinder;
    ServiceConnection downloadServiceConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
            downloadServiceBinder = (DownloadServiceBinder) iBinder;
        }
        public void onServiceDisconnected(ComponentName componentName) {
            downloadServiceBinder = null;
        }
    }

Note

Do not start the service on your own, always interact with it through the `DownloadServiceBinder`. The service will automatically start itself when there’s at least one download ongoing and will stop when there are no pending downloads.

The downloader plugin needs a `DownloadNotificationProvider` implementation.

This is a sample implementation that will show a progress bar in such notification.

    public class NotificationProvider extends DownloadNotificationProvider {

        public NP(int notificationId) {
            super(notificationId);
        }

        @NonNull
        @Override
        public Notification getNotification(@NonNull DownloadServiceBinder downloadServiceBinder, @NonNull Context context) {
            Notification.Builder builder;

            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                String id = "content_download_channel";
                createNotificationChannel(context, id);
                builder = new Notification.Builder(context, id);
            } else {
                builder = new Notification.Builder(context);
            }

            builder.setContentTitle(context.getString(R.string.app_name))
                    .setAutoCancel(false)
                    .setSmallIcon(R.drawable.ic_cloud_download_black_24dp);

            List<Download> downloads;
            try {
                downloads = downloadServiceBinder.getDownloads();
            } catch (Exception e) {
                e.printStackTrace();
                return builder.build();
            }

            long totalSize = 0;
            long downloadedSize = 0;
            boolean allCompleted = true;

            // Compute sum for all downloads
            for (Download download : downloads) {
                totalSize += download.getEstimatedSize();
                downloadedSize += download.getDownloadedSize();
                allCompleted = allCompleted && download.getState() == Download.STATE_DONE;
            }

            if (allCompleted) {
                builder.setContentText("Downloads finished")
                        .setProgress(0, 0, false)
                        .setOngoing(false);
            } else {
                double progress = (double) downloadedSize / totalSize;
                builder.setContentText("Downloading content")
                        .setProgress(100, (int) (100.0 * progress), false)
                        .setOngoing(true);
            }
            return builder.build();
        }
    }

The `getNotification` method will be called after each downloader event (explained below).

If you want to change this behaviour you can override the `onDownloadEvent` method.

To start with the new download the application provides `DownloadService` with the `Bundle` so that the downloader can fetch and parse the manifest and prepare the `Download` model. The `Bundle` should hold the following keys:

- `INTENT_URL` expects a `String` (mandatory),

- `INTENT_DOWNLOAD_ID` expects a `String` (mandatory),

- `INTENT_DOWNLOAD_FOLDER` expects a `String` (mandatory),

- `INTENT_DRM_CONFIGURATION` expects a `DrmConfiguration` (optional),

- `INTENT_CONTENT_TYPE` expects one of `CONTENT_TYPE_UNKNOWN` for auto-detection, `CONTENT_TYPE_DASH`, `CONTENT_TYPE_SMOOTHSTREAMING`, or `CONTENT_TYPE_MP4`

- `INTENT_HD_CONTENT_FILTER` expects an integer bit field

- `INTENT_VIDEO_SIZE_FILTER` expects `Point` defining the video size filter or one of `VIDEO_SIZE_FILTER_NONE`, `VIDEO_SIZE_FILTER_AUTO`

- `INTENT_VIDEO_CODEC_FILTER` expects one of `VIDEO_CODEC_FILTER_NONE`, `VIDEO_CODEC_FILTER_CAPS`

    String downloadId = "ID";
    File moviesFolder = getExternalFilesDir(Environment.DIRECTORY_MOVIES);
    File target = new File(moviesFolder, "Downloads/" + downloadId);

    Bundle bundle = new Bundle();
    bundle.putString(SdkConsts.INTENT_URL, "MANIFEST_URL");
    bundle.putString(SdkConsts.INTENT_DOWNLOAD_ID, downloadId);
    bundle.putString(SdkConsts.INTENT_DOWNLOAD_FOLDER, target.getAbsolutePath());

    downloadServiceBinder.prepareDownload(context, bundle, new Downloader.ModelReadyCallback() {
        public void onError(@NonNull Exception e) {
            Log.e(TAG, "Error while preparing download: " + e.getMessage(), e);
        }
        public void onModelAvailable(@NonNull Download download) {
            // initiate selection here of video quality, audio and subtitle tracks
            // either automatically or manually
        }
    });

The client callback `ModelReadyCallback` is invoked when the `Download` model is ready. Now the desired video quality, audio and subtitle tracks have to be selected by the application either automatically or manually:

    download.setSelectedVideoTrackQuality(0);
    download.setSelectedAudioTracks(new int[]{0});

And finally the download needs to be registered in the downloader and optionally started:

    downloadServiceBinder.createDownload(download, true);

The downloader keeps the list of downloads with states and each download can be paused, resumed and deleted independently:

    List<Download> downloads = downloadServiceBinder.getDownloads();

    downloadServiceBinder.pauseDownload(downloads.get(0).getId());
    downloadServiceBinder.resumeDownload(downloads.get(0).getId());
    downloadServiceBinder.deleteDownload(downloads.get(0).getId());

Note that `createDownload`, `deleteDownload`, `resumeDownload` and `pauseDownload` are asynchronous and the results are broadcasted using `LocalBroadcastManager`. The following messages reflecting the downloader state change are defined:

- `ACTION_DOWNLOAD_STOPPED`,

- `ACTION_DOWNLOAD_CREATED`,

- `ACTION_DOWNLOAD_STARTED`,

- `ACTION_DOWNLOAD_DELETED`,

- `ACTION_DOWNLOAD_COMPLETED`,

- `ACTION_DOWNLOAD_NO_PENDING`,

- `ACTION_DOWNLOAD_ERROR`,

- `ACTION_DOWNLOAD_STORAGE_LOW`,

- `ACTION_DOWNLOAD_STORAGE_OK`

- `ACTION_DOWNLOAD_PROGRESS`

- `ACTION_DOWNLOAD_PATH_UPDATE`

    IntentFilter filter = new IntentFilter();
    filter.addCategory(MessageHandler.INTENT_DOWNLOAD_CATEGORY);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_ERROR);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_STOPPED);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_CREATED);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_STARTED);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_DELETED);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_COMPLETED);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_NO_PENDING);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_STORAGE_OK);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_STORAGE_LOW);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_PROGRESS);
    filter.addAction(MessageHandler.ACTION_DOWNLOAD_PATH_UPDATE);

    LocalBroadcastManager.getInstance(context).registerReceiver(new BroadcastReceiver{
        public void onReceive(Context context, Intent intent) {
            String downloadId = intent.getStringExtra(MessageHandler.INTENT_DOWNLOAD_ID);
            Log.d(TAG, "Message: " + intent.getAction() + ", download Id: " + downloadId);
            switch (intent.getAction()) {
                case MessageHandler.ACTION_DOWNLOAD_STOPPED:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_CREATED:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_STARTED:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_DELETED:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_COMPLETED:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_NO_PENDING:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_ERROR:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_STORAGE_LOW:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_STORAGE_OK:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_PROGRESS:
                    break;
                case MessageHandler.ACTION_DOWNLOAD_PATH_UPDATE:
                    break;
                default:
                    break;
            }
        }
    }, filter);

Note that when the system storage becomes low all the downloads will be paused automatically and message `ACTION_DOWNLOAD_STORAGE_LOW` will be sent. The device storage should then be cleaned up by the application either manually or automatically and the downloads should be resumed.

The downloader is a sticky service and will continue downloads after the system re-creates it (e.g. when the service process is killed).

To start the playback of the downloaded content the application should follow Starting Playback from an Intent with some additional keys:

    Intent intent = new Intent(this, PlayerActivity.class);
    intent.putExtra(SdkConsts.INTENT_URL, download.getLocalManifestUrl());
    intent.putExtra(SdkConsts.INTENT_DRM_CONFIGURATION, download.getDrmConfiguration());
    intent.putExtra(SdkConsts.INTENT_DOWNLOAD_FOLDER, target.getAbsolutePath());

The downloader will always download one asset (movie) at a time. The reasoning for this behaviour is that, assuming constant bandwidth for all the assets, the amount of time for all the downloads to complete would be equal regardless they’re downloaded either sequentially or in parallel. In addition, with sequential downloading, the first asset will be ready for playback sooner and should the connection be lost, only one download would be affected.

### Scoped Storage

With the introduction of Android 10 (API 29), the concept of “scoped access” has been introduced by Google (link).

On Android 10 and higher, all apps by default get access to this mode without any additional permissions. Scoped storage allows them to access the Media of the device through the media store API, in addition to an app-specific directories.

There’s is the possibility to keep the old permission behaviour on API 29, if the application sets the `requestLegacyExternalStorage` flag to `true` in the manifest. This flag only serves for API 29, and will be ignored if the `targetSdk` is set to API 30 or higher.

Your app is affected by change if your downloads are not in one of the directories returned by the following methods:

- getFilesDir

- getExternalFilesDir

- getExternalFilesDirs

If you’re using any other path, and you update to `targetSdk` 30, access to those downloads will be lost.

You can take care of migrating the existing Downloads to a scoped storage path on your own, and updating the reference for those in our SDK. You can do this through the `updateDownloadPath` method. Note that this method will not migrate the files themselves.

We are also currently working on bringing to the Downloader additional helper methods to ease migration of data. Those will be published on a later release.

Even if you choose not to do the Downloads migration now, it is highly recommended to start using one of the aforementioned methods to retrieve a scoped storage path in order to save the new Downloads into.

For this reason the SDK will, by default, refuse to download anything into a path which is not part of the scoped storage locations. This behaviour can be disabled by setting `allowNonScopedStorageDownload` to `true` if needed, but we encourage you not to do so.

### Request and Response Modifiers

The Downloader plugin supports modifying network requests and responses through `RequestModifier` and `ResponseModifier` interfaces. This feature allows you to customize how the downloader interacts with network resources.

You can add modifiers to the downloader in as follows:

    // Add a request modifier
    DownloaderPlugin.addRequestModifier(new RequestModifier() {
        @NonNull
        @Override
        public Request onRequest(@NonNull Request request) throws IOException {
            // Modify the request, for example, add headers
            request.addHeader("Custom-Header", "Value");
            return request;
        }
    });

    // Add a response modifier
    DownloaderPlugin.addResponseModifier(new ResponseModifier() {
        @NonNull
        @Override
        public Response onResponse(@NonNull Response response) {
            // Apply modifications to the response
            return response;
        }
    });

The `DownloaderPlugin` also provides methods to remove modifiers or clear all modifiers:

    // Remove specific modifiers
    DownloaderPlugin.removeRequestModifier(requestModifier);
    DownloaderPlugin.removeResponseModifier(responseModifier);

    // Clear all modifiers
    DownloaderPlugin.clearRequestModifiers();
    DownloaderPlugin.clearResponseModifiers();

    // Get current modifiers
    List<RequestModifier> requestModifiers = DownloaderPlugin.getRequestModifiers();
    List<ResponseModifier> responseModifiers = DownloaderPlugin.getResponseModifiers();

Modifiers are applied in the order they were added. For maximum compatibility, ensure that your modifiers handle exceptions gracefully and don’t perform long-lasting operations as those might impact download performance.

## Analytics

The PRESTOplay SDK for Android offers plugins to integrate the following third party analytics services:

> - Youbora

> - Nielsen

> - Mux

> - Conviva

> - Broadpeak

> - Vimond

> - Adobe

The integrations use a common interface `AnalyticsSession` to expose a running session. Please note though that for the most common use-cases, you will not need to interact with the analytics session directly. The plugins are integrated with the player and trigger the calls against the analytics session automatically.

By default the analytics session is created and started whenever a stream is opened with `open(Bundle)`. However, it is also possible to create and start the analytics later, upon `play()`. This option is useful when the playback does not start automatically and the user has to actively trigger playback start:

    // Add the analytics session option
    bundle.putInt(SdkConsts.INTENT_ANALYTICS_SESSION_TYPE, SdkConsts.ANALYTICS_SESSION_TYPE_PLAY);
    // Add the option not to start playback automatically
    bundle.putBoolean(SdkConsts.INTENT_START_PLAYING, false);

All the analytics plugins use `AnalyticsMetaData` provided to the `PlayerController` by the client application either explicitly through `setAnalyticsMetaData`, or through the `Intent` (see Starting Playback from an Intent for an example on how to use a `Intent` to configure the player). The analytics metadata has to be created and passed before starting the playback.

Passing the metadata through the intent:

    // Create analytics meta-data
    AnalyticsMetaData analyticsMetaData = new AnalyticsMetaData(isLive, assetId);

    // Set analytics common values
    analyticsMetaData.viewerId = prefs.getUserName();
    // ...

    // Set analytics custom values
    Bundle customValues = new Bundle();
    customValues.putString("title", ".....");
    customValues.putString("cdn", ".....");
    analyticsMetaData.extra.putBundle("media", customValues);

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

### Session detaching

By default, AnalyticSession are started and stopped automatically by the PlayerController. Sessions start whenever playback starts, and stop whenever content ends or the PlayerController is disposed.

If you want to avoid this, and persist a session beyond the PlayerController lifecycle, you can do the following.

In your teardown code, get the reference to the currently used AnalyticsSession and detach it from the PlayerController before releasing it.

    // Keep analytics session, analyticsSession is a class variable
    analyticsSession = playerView.getPlayerController().getAnalyticsSession();
    if (analyticsSession != null) {
        // Unbind this AnalyticsSession from the PlayerController
        analyticsSession.detachFromController();
    }
    // Release player
    playerView.getPlayerController().release();

While in this state. The AnalyticsSession will be still alive and likely, depending on the analytics provider, sending keep-alive traces.

When you want to re-attach the AnalyticsSession to the PlayerController instance, which can be the same or a completely new instance, you just need to set it before its `open()` method.

    // Restore ongoing AnalyticsSession
    playerView.getPlayerController().setAnalyticsSession(analyticsSession);
    try {
        playerView.getPlayerController().open(bundle);
    } catch (Exception e) {
        Log.e(TAG, "Error while opening player: " + e.getMessage(), e);
    }

If a non-null AnalyticsSession is set, it will be used instead of creating a new session.

The `detachFromController` method returns a boolean indicating if the AnalyticsSession could successfully unbind itself from the PlayerController. Currently only the Youbora and Conviva implementations support session detaching.

You should never use the same AnalyticsSession concurrently in more than one instance of PlayerController. Make sure to always call `detachFromController()` before setting the AnalyticsSession to a new PlayerController.

### Youbora

The PRESTOplay SDK for Android bundles an integration for Youbora, the Analytics Service from Nice People At Work.

If you are coming from a PRESTOplay SDK for Android version 4.1.9 or earlier and want to update your integration refer to the Update from PRESTOplay SDK for Android version 4.1.9 or earlier section.

The plugin and all its dependencies are part of the bundle repository and can be added as a dependency to your application build:

    dependencies {
        ...
        compile 'com.castlabs.player:youbora-plugin:4.3.2'
        ...
    }

You should also add NPAW’s public Maven repository to your gradle file in order to get their binaries:

    repositories {
        ...
        maven { url 'http://dl.bintray.com/npaw/youbora' }
        ...
    }

This will add the `YouboraPlugin` to your project.

You can register the plugin with the SDK.

By default, the Youbora plugin will report only fatal errors to the backend. If you wish to also report the SDK warnings as Youbora non-fatal errors, you have to enable it before registering the plugin:

    YouboraPlugin youboraPlugin = new YouboraPlugin(accountCode);
    // Optional: Report SDK warnings as Youbora non-fatal errors (default: false)
    // youboraPlugin.reportWarnings(true);
    PlayerSDK.register(youboraPlugin);

Note that you have to pass a valid Youbora accountCode to the constructor in order to initialize the plugin and get access to the backend service.

In addition, you can use the Youbora Options object to customize the plugin configuration.

You should create the `AnalyticsOptions` object and fill it with the desired config. This object will be later passed to the `createMetadata` method.

Please refer to more details about possible options to the Youbora documentation.

By default, the plugin overrides the following global options upon initialization:

> - `accountCode` is always set to the systemId you pass in the plugin constructor

> - `username` is set to `analyticsMetadata.viewerId`

> - `contentIsLive` is set to `analyticsMetadata.live`

Also, the following fields may be filled by the plugin, if they are not informed:

> - `content_id` inside `contentMetadata` will be filled with `analyticsMetadata.assetId`

> - `contentDuration` will be filled with `analyticsMetadata.durationSeconds`

> - `contentResource` will be filled with PlayerController’s `getPath` return value

The Youbora documentations lists more options you can pass in the global configuration.

Passing Youbora configuration to the player:

    // Create Youbora's AnalyticsOptions object
    AnalyticsOptions analyticsOptions = new AnalyticsOptions();

    // Set any desired fields
    analyticsOptions.setContentTitle("Movie");

    // Extra properties
    Map<String, Object> properties = new HashMap<>();
    properties.put("language", "English");
    properties.put("year", "2018");
    properties.put("price", "Free");

    analyticsOptions.setContentMetadata(properties);

    // Create AnalyticsMetadata
    AnalyticsMetaData analyticsMetaData = YouboraPlugin.createMetadata(
            false,              // Live or not, will set analyticsMetadata.live
            prefs.getAssetId(), // Unique asset identifier, will set analyticsMetadata.assetId
            analyticsOptions);    // Youbora Options object

    // Set a user ID
    analyticsMetaData.viewerId = prefs.getUserName();

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

In this example, we create the meta-data and then pass it to the Intent Bundle that is used to start playback.

With this meta-data configuration in place and passed to the `PlayerController` either through the Intent Bundle or explicitly trough `setAnalyticsMetaData`, the session will be automatically started and stopped.

#### Youbora Sessions

Youbora also offers application tracking, called Youbora Sessions. For exact details on how to use this service please refer to NPAW’s documentation. In this section we exclusively present the minimum code required to achieve interoperability, and allow Youbora’s library to match the application Session with the video ones generated by the PRESTOplay SDK for Android.

In the Application’s `onCreate`, when initializing the SDK alongside with the `YouboraPlugin`, pass in an instance of the Plugin you will use to perform application tracking.

    private static final String YOUBORA_CUSTOMER_KEY = "youboracustomerkey";

    @Override
    public void onCreate() {
        super.onCreate();

        // ...

        Options options = new Options();
        options.setAccountCode(YOUBORA_CUSTOMER_KEY);
        // Set other required options

        // Plugin instance to use for application tracking
        this.youboraSDK = new Plugin(options, this);

        YouboraPlugin youboraPlugin = new YouboraPlugin(YOUBORA_CUSTOMER_KEY, this.youboraSDK);

        // ...

        PlayerSDK.register(youboraPlugin);
    }

In case you want to update the Plugin instance once the application has been created, this can be achieved through the component. This should be done before starting a playback session, but it is usually not required if the Plugin instance stays the same throughout the whole application lifecycle.

    // (Optional) Set the Youbora plugin to use before opening the PlayerController
    // This is not needed if the Youbora's Plugin instance is the same as set on
    // the app's onCreate
    YouboraAnalyticsSession component = playerController.getComponent(YouboraAnalyticsSession.class);
    component.setPlugin(youboraPlugin);

    playerController.open(...);

#### Update from PRESTOplay SDK for Android version 4.1.9 or earlier

The PRESTOplay SDK for Android version 4.1.10 updates the Youbora integration to version 6. This introduces some breaking changes that are detailed here.

The Youbora binaries are now distributed in a Maven public repository. So you will need to add NPAW’s repository to your gradle file:

    repositories {
        ...
        maven { url 'http://dl.bintray.com/npaw/youbora' }
        ...
    }

The Youbora plugin is now configured through a custom configuration object; `Options`, instead of a `Map`.

Refer to the Youbora developers portal for a complete explanation about these Options and how to migrate them to V6; Setting Youbora Options.

You should create the `Options` object and fill it with the desired config. This object will be later passed to the `createMetadata` method.

### Nielsen

The PRESTOplay SDK for Android is integrated with Nielsen service in the form of a plugin. First, the plugin needs to be added as a dependency in the application gradle:

    dependencies {
        ...
        implementation 'com.castlabs.player:nielsen-plugin:4.3.2'
        ...
    }

Then the plugin is registered and enabled by the application:

    PlayerSDK.register(new NielsenPlugin(appId, appName, appVersion, sfCode));
    ...
    NielsenPlugin nielsen = PlayerSDK.getPlugin(NielsenPlugin.class);
    if (nielsen != null) {
        nielsen.setEnabled(true);
    }

Or the other constructor could be used to make a new instance of `NielsenPlugin`:

    JSONObject config = new JSONObject();
    try {
        config.put(NielsenPlugin.CONFIG_KEY_APPID, appId);
        config.put(NielsenPlugin.CONFIG_KEY_APPNAME, appName);
        config.put(NielsenPlugin.CONFIG_KEY_APPVERSION, appVersion);
        config.put(NielsenPlugin.CONFIG_KEY_SFCODE, sfCode);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    NielsenPlugin nielsenPlugin = new NielsenPlugin(config);

The Nielsen plugin benefits from the PRESTOplay SDK for Android integrated with IMA service and provides two use cases out of the box: content with and without IMA advertisements. See an example above on how to use the PRESTOplay SDK for Android plugin integrated with IMA.

The plugin sends content and ads metadata to the Nielsen backend. The content metadata is taken by the plugin from the `AnalyticsMetaData`. The advertisements metadata is taken from IMA `Ad` object.

The plugin uses the following variables to generate the `channelInfo`:

> - `channelName` will be filled with `analyticsMetadata.assetId`

> - `videoUrl` will be filled with `playerController.getPlayerConfig().contentUrl`

And in order to generate the `jsonMetadata` (in loadMetadata(JSONObject jsonMetadata)):

> - `assetId` will be filled with `analyticsMetadata.assetId`

> - `length` will be filled with `playerController.getDuration()`

And finally to generate the advertisement metadata:

> - `type` is one of `preroll`, `midroll` and `postroll` according to `ad.position`

> - `length` is equal to `TimeUtils.ms2s(ad.durationMs)`

> - `assetid` is equal to `ad.id`

> - `title` is equal to `ad.title`

However, when needed, the advertisement metadata can be enriched by the client application by implementing and registering `AdClientInterface.Listener`:

    PlayerView playerView;
    ...

    AdController adController = playerView.getPlayerController().getAdController();
    if (adController != null) {
        adController.setClientListener(new AdClientInterface.Listener() {
            @Nullable
            public Bundle onGetMetadata(@NonNull Ad ad) {
                Bundle bundle = new Bundle();
                bundle.putString("cdn", ".....");
                return bundle;
            }
        });
    }

It is also possible that instead of the integrated IMA service the client uses its own implementation of an ads provider. In this case, the client needs to take care of content and ads playback switches and the plugin only forwards the ads metadata to the Nielsen backend:

    PlayerView playerView;
    ...

    AdController adController = playerView.getPlayerController().getAdController();
    if (adController != null) {
        adController.adStarted(new Ad());
        ...
        adController.adSetPlaybackPosition(1);
        adController.adSetPlaybackPosition(2);
        ...
        adController.adCompleted();
    }

Note, that in the latter case the ads metadata enrichment is also possible.

### Mux

The PRESTOplay SDK for Android is integrated with Mux service in the form of a plugin. First, the plugin needs to be added as a dependency in the application gradle:

    dependencies {
        ...
        compile 'com.castlabs.player:mux-plugin:4.3.2'
        ...
    }

You also need to add Mux’ Maven repository to your dependencies in gradle:

    repositories{
        ...
        maven { url 'https://muxinc.jfrog.io/artifactory/default-maven-release-local/' }
        ...
    }

This will add Mux plugin to the project and the plugin can be registered with the PRESTOplay SDK for Android:

    MuxPlugin muxPlugin = new MuxPlugin(MUX_ENVIRONMENT_KEY);
    PlayerSDK.register(muxPlugin);

Note that you can also omit the Mux ENVIRONMENT KEY in the constructor. If you chose not to inform it, it must be set in Mux’s `CustomerPlayerData` right before opening the `PlayerController`. If the Environment Key is informed in the `CustomerPlayerData` passed to the Player, it will override the one used to create the `MuxPlugin`.

In addition, you can use the Mux `CustomerPlayerData` object to add content metadata.

You should create the `CustomerPlayerData` object and fill it with the desired fields. This object will be later passed to the `createMetadata` method.

Please refer to more details about this object to the Mux documentation.

The Plugin will automatically map the following values from `AnalyticsMetaData`.

> - `videoIsLive` is informed with the value from `analyticsMetaData.live`

> - `videoId` is informed with the value from `analyticsMetaData.assetId`

In addition, the Plugin will try to fill the following fields if they are uninformed:

> - `videoDuration` is taken from `analyticsMetaData.durationSeconds` if informed, or from the stream itself otherwise (if available)

> - `videoSourceUrl` filled with PlayerController’s `getPath` return value

> - `videoStreamType` possible values are DASH, HLS, MP4, SmoothStreaming and Unknown

Passing Mux metadata to the player:

    // Create MUX CustomerData, fill in metadata
    CustomerVideoData videoData = new CustomerVideoData();
    videoData.setVideoTitle("Inception");
    videoData.setVideoLanguageCode("en");
    videoData.setVideoProducer(...);
    videoData.setVideoEncodingVariant(...);

    // Create MUX PlayerData
    CustomerPlayerData playerData = new CustomerPlayerData();
    playerData.setViewerUserId("userId");
    playerData.setExperimentName(...);

    // This will override the key set when creating the MuxPlugin
    // Not needed in most cases
    playerData.setEnvironmentKey("MUX_ENVIRONMENT_KEY");

    CustomerViewData viewData = new CustomerViewData();
    viewData.setViewSessionId("viewSessionId");

    // (Optional) Set custom dimensions data
    CustomData customData = new CustomData();
    customData.setCustomData1("customDimensionValue1");

    // (Optional) Custom Options
    CustomOptions customOptions = new CustomOptions();
    //customOptions.setBeaconDomain("beacon.example.domain.com");

    // Create CustomerData and pass all data objects
    CustomerData customerData = new CustomerData(playerData, videoData, viewData);
    customerData.setCustomData(customData);

    // Create AnalyticsMetadata
    AnalyticsMetaData analyticsMetaData = MuxPlugin.createMetadata(
            false,              // Live or not, will set analyticsMetadata.live
            prefs.getAssetId(), // Unique asset identifier, will set analyticsMetadata.assetId
            customerData,       // CustomerData
            customOptions,      // CustomOptions, or null
            null);              // Already existing AnalyticsMetaData object, or null

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

In this example, we create the meta-data and then pass it to the Intent Bundle that is used to start playback.

With this meta-data configuration in place and passed to the `PlayerController` either through the Intent Bundle or explicitly trough `setAnalyticsMetaData`, the session will be automatically started and stopped.

### Conviva

The PRESTOplay SDK for Android is integrated with Conviva analytics service in the form of Conviva plugin. The Conviva plugin is part of the bundle repository and can be added as a dependency in the application gradle:

    dependencies {
        ...
        implementation 'com.castlabs.player:conviva-plugin:4.3.2'
        ...
    }

This will add Conviva plugin to the project and the plugin can be registered with the PRESTOplay SDK for Android:

    ConvivaPlugin convivaPlugin = new ConvivaPlugin(CONVIVA_CUSTOMER_KEY);

    if (BuildConfig.DEBUG) {
        HashMap<String, Object> settings = new HashMap<>();
        settings.put(ConvivaSdkConstants.GATEWAY_URL, CONVIVA_TOUCHSTONE_GATEWAY);
        settings.put(ConvivaSdkConstants.LOG_LEVEL, ConvivaSdkConstants.LogLevel.DEBUG);
        convivaPlugin.setSettings(settings);
    }

    HashMap<String, String> deviceInfo = new HashMap<>();
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.ANROID_BUILD_MODEL, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.OPERATING_SYSTEM_VERSION, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.DEVICE_BRAND, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.DEVICE_MANUFACTURER, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.DEVICE_MODEL, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.DEVICE_TYPE, ".....");
    deviceInfo.put(ConvivaSdkConstants.DEVICEINFO.DEVICE_VERSION, ".....");
    convivaPlugin.setDeviceInfo(deviceInfo);

    PlayerSDK.register(convivaPlugin);

The Conviva plugin benefits from the PRESTOplay SDK for Android integrated with IMA service and provides with two use cases out of the box: content with and without IMA advertisements. The content metadata is taken by the plugin from the `AnalyticsMetaData`. The advertisements metadata is taken from IMA `Ad` object.

The Plugin will automatically map the following values:

> - `ConvivaSdkConstants.FRAMEWORK_NAME` is filled with the value from `SdkConsts.PLAYER_NAME`

> - `ConvivaSdkConstants.FRAMEWORK_VERSION` is filled with the value from `PlayerSDK.getVersion()`

> - `ConvivaSdkConstants.STREAM_URL` is filled with the value from `playerController.getPath()`

> - `ConvivaSdkConstants.ASSET_NAME` is filled with the value from `analyticsMetaData.assetId`

> - `ConvivaSdkConstants.IS_LIVE` is filled with the value from `analyticsMetaData.live`

> - `ConvivaSdkConstants.VIEWER_ID` is filled with the value from `analyticsMetaData.viewerId`

> - `ConvivaSdkConstants.DURATION` is filled with the value from `TimeUtils.us2s(playerController.getDuration())` (If the duration was not valid it will filled with `analyticsMetaData.durationSeconds`)

Also the advertisement metadata will automatically map the following values:

> - `ConvivaSdkConstants.AdType` is determined with the value of `ad.streamType` (It will be ConvivaSdkConstants.AdType.SERVER_SIDE or ConvivaSdkConstants.AdType.CLIENT_SIDE)

> - `ConvivaSdkConstants.AdPlayer` is determined with the value of `ad.playerType` (It will be ConvivaSdkConstants.AdPlayer.CONTENT or ConvivaSdkConstants.AdPlayer.SEPARATE)

Passing Conviva metadata to the player:

    // Create extra tags
    Bundle extra = new Bundle();

    // Conviva predefined tags
    extra.putString(ConvivaAnalyticsSession.META_KEY_APPLICATION_NAME, "My Application Name");
    extra.putString(ConvivaAnalyticsSession.META_KEY_DEFAULT_RESOURCE, "...");

    // Optional custom tags
    Bundle customTags = new Bundle();
    customTags.putString("sampleCustomTag", "sampleCustomValue");

    // Create analytics meta-data
    AnalyticsMetaData analyticsMetaData = ConvivaPlugin.createMetadata(live, assetId, "viewerID", extra, customTags);

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

The Conviva plugin also exposes the underlying ConvivaVideoAnalytics and ConvivaAdAnalytics instances. This may be useful for an advanced use cases, such as sending custom playback related events.

To send Conviva custom playback related event:

    // Get the Analytics session
    ConvivaAnalyticsSession convivaAnalyticsSession = playerView.getPlayerController().getComponent(ConvivaAnalyticsSession.class);

    if (convivaAnalyticsSession != null) {
        // Fill custom map
        HashMap<String, Object> customData = new HashMap<>();
        customData.put("now", Long.toString(System.currentTimeMillis()));
        customData.put("fizz", "buzz");

        String eventType = "customEvent";

        // Get the ConvivaVideoAnalytics instance
        ConvivaVideoAnalytics videoAnalytics = convivaAnalyticsSession.getVideoAnalytics();

        // Send event
        if (videoAnalytics != null) {
            videoAnalytics.reportPlaybackEvent(eventType, customData);
        }

        // Get the ConvivaAdAnalytics instance
        ConvivaAdAnalytics adAnalytics = convivaAnalyticsSession.getAdAnalytics();

        // Send event
        if (adAnalytics != null) {
            String errorMessage = "...";
            adAnalytics.reportAdFailed(errorMessage);
        }
    }

#### Conviva with `SingleControllerPlaylist`

When using Conviva integration with a `SingleControllerPlaylist`, it is important to provide an `AnalyticsMetaData` object for each item in the playlist. This ensures that Conviva can track each item individually.

Below is an example of how to create a playlist with multiple items, each with its own `AnalyticsMetaData` for Conviva.

    PlayerConfig[] playlistItems = new PlayerConfig[]{
        new PlayerConfig.Builder("http://example.com/stream1.mpd")
                .analyticsMetaData(ConvivaPlugin.createMetadata(false, "Asset1", "viewer123", null, null))
                .get(),
        new PlayerConfig.Builder("http://example.com/stream2.mpd")
                .analyticsMetaData(ConvivaPlugin.createMetadata(false, "Asset2", "viewer123", null, null))
                .get(),
        new PlayerConfig.Builder("http://example.com/stream3.mpd")
                .analyticsMetaData(ConvivaPlugin.createMetadata(false, "Asset3", "viewer123", null, null))
                .get()
    };

    SingleControllerPlaylist playlist = new SingleControllerPlaylist(playlistItems);
    playerController.open(playlist);

### Broadpeak

The PRESTOplay SDK for Android is integrated with Broadpeak analytics service in the form of Broadpeak plugin. The Broadpeak plugin is part of the bundle repository and can be added as a dependency in the application gradle:

    dependencies {
        ...
        compile 'com.castlabs.player:broadpeak-plugin:4.3.2'
        ...
    }

This will add Broadpeak plugin to the project and the plugin can be registered with the PRESTOplay SDK for Android:

    BroadpeakPlugin broadpeakPlugin = new BroadpeakPlugin("analytics_url", "nano_cdn_host", "*")

    PlayerSDK.register(broadpeakPlugin);

    // ...

    PlayerSDK.init(getApplicationContext());

The Broadpeak plugin uses takes care of sending player metrics and managing view lifecycle calls as required by the underlying SmartLib class.

The `BroadpeakPlugin` intercepts the first manifest request, and replaces it with the return value of `SmartLib::getURL`. It’s the SmartLib responsibility to perform such Uri redirect. Internally, the SmartLib uses the domains name list in order to decide whether to actually perform a url redirect for the current domain or not. This domain list should be set while creating the `BroadpeakPlugin`, through its last argument.

Warning

If the default domain names list is used (`"*"`), all manifest requests will try to be redirected by the `SmartLib`. This can introduce a significant delay in start-up time as the `SmartLib` tries to resolve the redirect.

Make sure you set the domain names list appropriately, following Broadpeak’s recommendation.

If you want to perform any advanced operations and interact directly with the Broadpeak SDK, you can use the SmartLib class.

In case that the BroadpeakPlugin should be disabled for a playback session, this can be achieved as follows, before creating the `PlayerController`:

    BroadpeakPlugin broadpeakPlugin = PlayerSDK.getPlugin(BroadpeakPlugin.class);
    broadpeakPlugin.setEnabled(false);

    // ...

    playerView.getPlayerController().open(...);

This way the `BroadpeakPlugin` can be enabled or disabled at run-time without needing to re-init the SDK.

The Broadpeak session allows to set custom parameters and options. This is how those can be passed to the player:

    // Create Analytics Metadata for Broadpeak
    Bundle customParameters = new Bundle();
    customParameters.putString("name", "value");
    customParameters.putString("pre_startup_time", "in_ms");

    // Options
    SparseArray<Object> options = new SparseArray<Object>();
    options.put(StreamingSessionOptions.GDPR_PREFERENCE, StreamingSessionOptions.GDPR_CLEAR);
    options.put(StreamingSessionOptions.USERAGENT_AD_EVENT, "useragent");
    options.put(StreamingSessionOptions.SESSION_KEEPALIVE_FREQUENCY, 5000);

    AnalyticsMetaData analyticsMetaData = BroadpeakPlugin.createMetadata(live, assetId, customParameters, options);
    put(SdkConsts.INTENT_ANALYTICS_DATA, metadata);

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

In this example, we create the meta-data and then pass it to the Intent Bundle that is used to start playback.

Please check the Broadpeak documentation for a complete list of the available parameters and options.

### BroadpeakSdkElementExtension

The BroadpeakSdkElementExtension allows integration of Broadpeak SDK functionality with the StandaloneThumbnailProvider. This extension enables fetching thumbnails from streams through Broadpeak’s CDN if needed, and supports setting custom Broadpeak metadata, including custom parameters and options for the Broadpeak session.

Here’s how to use the extension with a StandaloneThumbnailProvider:

    // Create a StandaloneThumbnailProvider
    PlayerConfig config = new PlayerConfig.Builder(streamUrl).get();
    StandaloneThumbnailProvider provider = StandaloneThumbnailFactory.getProvider(config);

    // Create custom parameters and options
    Bundle customParameters = new Bundle();
    customParameters.putString("name", "value");

    SparseArray<Object> options = new SparseArray<>();
    options.put(StreamingSessionOptions.GDPR_PREFERENCE, StreamingSessionOptions.GDPR_CLEAR);

    // Create Broadpeak analytics metadata
    AnalyticsMetaData broadpeakMetadata =
        BroadpeakPlugin.createMetadata(isLive, assetId, customParameters, options);

    // Add the extension with metadata
    provider.addExtension(new BroadpeakSdkElementExtension(broadpeakMetadata));

    // Prepare the provider
    provider.prepare();

### Vimond

The PRESTOplay SDK for Android is integrated with Vimond Player Session API in the form of a plugin.

In addition to providing basic analytics capabilties, the `Vimond` plugin provides an implementation of concurrent stream limiting.

First, the plugin needs to be added as a dependency in the application gradle:

    dependencies {
        ...
        compile 'com.castlabs.player:vimond-plugin:4.3.2'
        ...
    }

This will add Vimond plugin to the project and the plugin can be registered with the PRESTOplay SDK for Android:

    VimondPlugin vimondPlugin = new VimondPlugin();
    PlayerSDK.register(vimondPlugin);

At playback time, a `JSONObject` must be provided to the plugin, alongside with Vimond’s authentication token.

This object, alongside with the token, will be later passed to the `createMetadata` method. This object, or “template”, must be retrieved through Vimond’s Play Service API prior to playback session start. Please refer to more details about this object to the Vimond documentation.

In order to retrieve a response from Vimond’s Play Service API, an authentication token is needed, which will be also needed by the Plugin to perform the Player Session API calls.

From the Play Service API response, the template object must be retrieved. The Plugin will automatically fill in most of the fields present in the Vimond template, but you are still required to provide values for the following fields:

> - `originator`

> - `client.envPlatform`

> - `client.envVersion`

> - `viewingSession`

You can get a detailed description of each field on Vimond’s documentation.

Passing Vimond template to the player:

    // Extract Vimond template from Vimond's Play Service API response
    // ...
    vimondObject = new JSONObject(...);

    // Fill in required fields
    vimondObject.put("originator", ...);
    vimondObject.getJSONObject("client").put("envPlatform", ...);
    vimondObject.getJSONObject("client").put("envVersion", ...);
    vimondObject.put("viewingSession", ...);

    // Create AnalyticsMetadata with the template and the Auth token.
    AnalyticsMetaData analyticsMetaData = VimondPlugin.createMetadata(vimondObject, "token");

    // Set the analytics meta-data
    intent.putExtra(SdkConsts.INTENT_ANALYTICS_DATA, analyticsMetaData);

In this example, we create the meta-data and then pass it to the Intent Bundle that is used to start playback.

Alternatively, you can also use a `PlayerConfig` object and set its `analyticsMetaData` field:

    // ...

    // Set the analytics meta-data
    playerConfigBuilder.analyticsMetaData(analyticsMetaData);

With this meta-data configuration in place and passed to the `PlayerController` either through the Intent Bundle or explicitly trough `setAnalyticsMetaData`, the session will be automatically started and stopped.

The `VimondPlugin` allows for further customisation via the `VimondComponent`.

The component allows for registering a `callback` to receive all Vimond backend response codes and act accordingly. It also allows for setting a new authentication token at runtime, and other configuration flags.

The callback can be used for logging, or to perform a custom action if desired. For instance, if the `VimondPlugin` is configured not to stop playback on an invalid response code, such action could be performed in the callback: `playerController.release()`.

In order to register a callback, you must retrieve the instance of the `VimondComponent` as follows:

    VimondComponent vimond = playerController.getComponent(VimondComponent.class);

    vimond.setCallback(new VimondCallback() {
       @Override
       public void onVimondResponse(int httpStatusCode,
                                    @Nullable Map<String, List<String>> headers,
                                    @Nullable String responseBody) {
            Log.d(TAG, "Vimond response (" + httpStatusCode + ") " + responseBody);
       }
    });

### Adobe

The PRESTOplay SDK for Android is integrated with Adobe Mobile Services SDK in the form of a plugin.

Adobe’s SDK allows for tracking app navigation events, alongside with video tracking events. This integration takes care of the later of those. The SDK can be used from app code to perform additional operations, such as app navigation tracking.

First, the plugin needs to be added as a dependency in the application gradle:

    dependencies {
        ...
        compile 'com.castlabs.player:adobe-plugin:4.3.2'
        ...
    }

This will add the Adobe plugin to the project and the plugin can be registered with the PRESTOplay SDK for Android:

    AdobePlugin adobePlugin = new AdobePlugin();
    PlayerSDK.register(adobePlugin);

To configure Adobe’s SDK, a JSON file with name `ADBMobileConfig.json` must be included in the application’s `assets` directory. The file contains the information about your Adobe account. At runtime, the Adobe SDK will read such JSON and use its configuration. For more information on how to obtain the configuration JSON please refer to Adobe’s documentation.

To enable the Adobe plugin, you must create it like any other plugin, and register it in the `PlayerSDK`:

    AdobePlugin adobePlugin = new AdobePlugin(/* optional boolean for debug logging */);
    PlayerSDK.register(adobePlugin);
    // ...
    PlayerSDK.init(getApplicationContext());

At playback time, a `MediaSettings` instance must be provided to the plugin, in order for it to generate the `AnalyticsMetadata` instance, which will be later passed to the Player through the `Intent` or the `PlayerConfig` when calling one of the `PlayerController.open(...)` methods.

The plugin will not override any of the fields in the `MediaSettings`, except for the `name` in case it is `null`.

When starting playback, the `MediaSettings` must be provided to the plugin, via `createMetadata`, in order to generate the `AnalyticsMetaData` instance, which is then passed to the `open()` method:

    MediaSettings mediaSettings = new MediaSettings();
    // Populate MediaSettings as desired
    bundle.putParcelable(SdkConsts.INTENT_ANALYTICS_DATA, AdobePlugin.createMetadata(mediaSettings));
    // ...
    playerController.open(bundle);

Alternatively, you can also use a `PlayerConfig` object and set its `analyticsMetaData` field:

    // ...

    // Set the analytics meta-data
    playerConfigBuilder.analyticsMetaData(analyticsMetaData);

With this meta-data configuration in place and passed to the `PlayerController` either through the Intent Bundle or explicitly trough `setAnalyticsMetaData`, the session will be automatically started and stopped.

## Crash Logging

The `Crashlog` class can be used to hook up third party crash reporting frameworks (such as Crashlytics). It is used throughout the SDK to report additional data in case a crash occurs. These data are delegated to registered `CrashReporter` instances.

In order to integrate a third party service, you will need to implement the `CrashReporter` interface and register it using the `addReporter` method.

The SDK logs the following meta data through the crash logger class:

Key | Description
--- | ---
CL-Playback-URL | The current playback URL
CL-DRM-URL | The license server URL
CL-DRM-Offline-Id | The identifier used to store the offline key
CL-DRM-RequestID | The log request ID generated for calls to DRMToday
CL-DRM-AssetID | The last used asset ID
CL-DRM-VariantID | The last used variant ID
CL-DRM-Type | The last used DRM type (Widevine, Playready, or OMA)
CL-DRM-Audio-Type | The last used DRM type for Audio tracks(Widevine, Playready, or OMA)
CL-DRM-Type | The last used DRM type (Widevine, Playready, or OMA)
CL-DRM-Device-Level | The security level available for the selected DRM type
CL-Playback-State | The current playback state
CL-SDK-Version | The version of the PRESTOplay SDK for Android
CL-Playback-Video | The dimensions of the currently played video representation
CL-Playback-Video-Bitrate | The bitrate of the currently played video representation
CL-Playback-Audio-Bitrate | The bitrate of the currently played audio representation
CL-Playback-PositionMS | The current playback position in milliseconds. Please note that this is updated at most with a resolution of one second.

In addition to the meta-data, the PRESTOplay SDK for Android will log all Exceptions that raised during playback as non-fatal errors to the `Crashlog`. You can configure this behavior globally using the global `PlayerSDK.CRASHLOG_AUTO_REPORT` configuration option.

### Crashlytics Integration

The SDK package bundles a plugin that can be used to setup and integrate Crashlytics with the SDK’s `Crashlog` mechanism. To enable the plugin, you will need to add it as a dependency in your project setup:

    dependencies {
        ...
        compile 'com.castlabs.player:crashlytics-connector:4.3.2'
        ...
    }

With the connector added to your project dependencies, you can load and register the plugin before you initialize the SDK:

    Fabric.with(getApplicationContext(), new Crashlytics());
    PlayerSDK.register(new CrashlyticsPlugin());
    PlayerSDK.init(getApplicationContext());

Please note that the plugin does not initialize Fabric and Crashlytics for you. Before you register an instance of this plugin with the SDK, please make sure that you initialize the Fabric SDK and add at least the Crashlytics Kit.

## User Agent

The PRESTOplay SDK for Android uses a custom user agent string for all network communications with our DRMtoday service and to the content provider.

You can use this information to monitor which SDK version, device model, or API are in use. As well, castLabs compiles this information to help customers solve issues quickly and to help improve the overall quality of the service.

The parameters found on the customer User Agent are:

> - SDK Version: The three digit number representing the used PRESTOplay SDK for Android version.

> - Model: The device model.

> - API Version: The Android API version of the device.

> - ExoPlayer Library Version: The ExoPlayer library version used by the SDK.

> - Customer Id: An identification string for the service provider.

> - Device Id: The device Id as provided by the operating system.

In addition to these predefined values, you can register additional key value pairs using the `UserAgent.register()` method. These values will be stored globally and sent with each request.

## Streamroot Plugin

The SDK package bundles a plugin that can be used to setup and integrate Streamroot DNA multi-source content delivery solutions. To enable the plugin, you will need to add it as a dependency in your project setup:

    dependencies {
        ...
        compile 'com.castlabs.player:streamroot-plugin:4.3.2'
        ...
    }

The example above integrates the plugin as a dependency. You can now register it with the SDK:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new StreamrootPlugin(
                "backend_url",
                this
            ));

            PlayerSDK.init(getApplicationContext());
        }
    }

The streamrootKey is now set as a meta-data in the application manifest.

    <manifest package="com.castlabs.sdk.streamroot_demo" xmlns:android="http://schemas.android.com/apk/res/android">
       <application>
           <meta-data android:name="io.streamroot.dna.StreamrootKey" android:value="your_streamroot_key"/>

After the plugin is registered, the player will use Streamroot DNA to create manifest and segments proxy.

Streamroot Plugin requires Java 8 to operate. Streamroot SDK is built with a support range going from Android 19 (4.4 KitKat) to Android 27 (8.0 Oreo). (for more details please check Streamroot DNA Support <https://support.streamroot.io/>)

## OkHttp Plugin

If you want to use the popular OkHttp Library, the SDK bundle contains a plugin that you can use to integrate OkHttp into the player.

To use the plugin, you need to integrate it as a dependency into you Application build and register the plugin with the SDK:

    dependencies{
         ...
         compile 'com.castlabs.player:okhttp-plugin:4.3.2'
         ...
    }

The example above integrates the plugin as a dependency. You can now register it with the SDK:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new OkHttpPlugin());
            PlayerSDK.init(getApplicationContext());
        }
    }

After the plugin is registered, the player will use OkHttp to create HTTP requests to manifests and content.

### Intercept Traffic

OkHttp can be also used for debugging purposes to intercept and show the network traffic. Please note that you should not deploy this in production when you publish your Application. This is a tool used for development and debugging purposes. You can find more information about Stetho, the library used for this, on their Website.

In order to use the network interceptor, you will need to add additional dependencies to the Stetho library and its OkHttp integration:

    dependencies{
         ...
         compile 'com.castlabs.player:okhttp-plugin:4.3.2'
         compile 'com.facebook.stetho:stetho:1.3.1'
         compile 'com.facebook.stetho:stetho-okhttp3:1.3.1'
         ...
    }

With these dependencies in place, you can setup the plugin using the network interceptor:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new OkHttpPlugin(
                 new OkHttpClient.Builder().addNetworkInterceptor(
                     new StethoInterceptor())));
            PlayerSDK.register(new OkHttpPlugin());
            PlayerSDK.init(getApplicationContext());
        }
    }

The OkHttp plugin allows you to pass a pre-configured builder in its’ constructor. We use that to pass in a builder configured to interecept network traffic using Stetho.

Using this extended setup allows you to use your local chrome development tools to intercept and show network traffic. For that, run the Application on a device connected via USB, start chrome and open a tab on chrome://inspect/#devices. Enable USB discovery and you will see you Application listed. You can now inspect the network traffic of your application.

Network traffic inspection with Chrome Dev Tools and Stetho

### Idle connection eviction

While usually there’s no need to handle connections at this level, it’s possible to evict all idle connections held by OkHttp. This might be of interest to save server resources if connections are kept alive by it for a very long time:

    .. code-block:: java

> playerController.release();

> // Evict idle connections final OkHttpPlugin okHttpPlugin = PlayerSDK.getPlugin(OkHttpPlugin.class); okHttpPlugin.evictIdleConnections();

## Thumbnails

Since version 4 of the PRESTOplay SDK for Android, the bundle contains the Thumbnail plugin. This plugins adds support to load and display scrubbing thumbnails in various formats.

The plugin is distributed with the SDK and you can add it as a dependency:

    dependencies {
        ...
        compile 'com.castlabs.player:thumbs-plugin:4.3.2'
        ...
    }

Once added you can register it with the SDK:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new ThumbsPlugin(true));
            PlayerSDK.init(getApplicationContext());
        }
    }

Note that we pass `true` as the constructor argument here. This will add the default view that can be used for basic rendering on top of a `PlayerView`. You can find more about the parameter in the API documentation for `ThumbsPlugin`.

The plugin supports the following formats:

> - BIF Containers

> - WebVTT index

> - Single or gridded JPG files with a template URL

> - DASH in-stream thumbnails

### Loading strategy

In order to improve the user experience. The Thumbnail plugin also allows for smarter preloading approaches. This is achieved through the `LoadingStrategy` class.

By default, thumbnail load will start whenever the first thumbnail is requested. It is possible to configure this behaviour so that loading starts immediately, or after a delay following playback start. This can be configured by providing a delay: `Builder.loadStartDelayMs(long)`.

A loading strategy defines loading “waves”. These waves only load a subset of all the available thumbnails for an asset. The goal being to spread out the thumbnails and to be able to provide a reasonable thumbnail for any media time in a short time.

A more spaced-out Wave will load fewer thumbnails and finish preloading faster, but will provide less accurate thumbnails. A less spaced Wave will provide more accurate thumbnails but takes longer to complete.

The plugin already uses a Wave-based approach for preloading by default. Such default consists of 3 waves which will preload thumbnails in 1-minute intervals, followed by 15-second intervals followed by all thumbnails.

A custom `LoadingStrategy` can be defined upon plugin creation. The following example defines four waves:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            final ThumbsPlugin plugin = new ThumbsPlugin(true);
                    plugin.setLoadingStrategy(new LoadingStrategy.Builder()
                            .loadStartDelayMs(0) // Start loading immediately
                            .addPercentageWave(0.10f)
                            .addTimeWave(1, TimeUnit.MINUTES)
                            .addTimeWave(20, TimeUnit.SECONDS)
                            .addStepWave(1)
                    .get());

            PlayerSDK.register(plugin);
            PlayerSDK.init(getApplicationContext());
        }
    }

Note that waves are processed sequentially in addition order, so they should be defined in ascending “density” order, ie. waves which will preload more thumbnails should be added last.

This can also be achieved by setting a different loading strategy at runtime, before opening the Player:

    final ThumbnailProvider thumbs = playerController.getComponent(ThumbnailProvider.class);

    thumbs.setLoadingStrategy(new LoadingStrategy.Builder()
                .loadStartDelayMs(0) // Start loading immediately
                .addPercentageWave(0.10f)
                .addTimeWave(1, TimeUnit.MINUTES)
                .addTimeWave(20, TimeUnit.SECONDS)
                .addStepWave(1)
            .get());

    playerController.open(...);

For more details check the documentation of the `LoadingStrategy` class.

### Network Configuration

The `NetworkConfiguration` can be used to specify the timeouts for the thumbnail downloads.

The following example shows how you can achieve this:

    bundle.put(SdkConsts.INTENT_NETWORK_CONFIGURATION, new NetworkConfiguration.Builder()
        // You can specify the timeouts for the thumbnails
        .thumbnailConnectionTimeoutMs(500)
        .thumbnailReadTimeoutMs(500)
        .get());

### Embedded

For embedded thumbnails, such as in a DASH in-stream thumbnails, there’s no additional action required. The SDK will automatically load the thumbnails defined in AdaptationSets onto the Player Model. You still need to control how those will be rendered, which is detailed in the section Using the built-in thumbnails view.

### Side-loaded

You can start loading thumbnail data directly if you registered the plugin and you are loading your streams through an Intent Bundle (see Starting Playback from an Intent). You need to create an instance of `SideloadedTrack` and add it to your intent bundle using the `SdkConsts.INTENT_SIDELOADED_TRACKS_ARRAYLIST` key. For example:

    ArrayList<SideloadedTrack> data = new ArrayList<SideloadedTrack>(){{
        add(new SideloadedTrack.ThumbnailBuilder()
                .url("thumbs/thumbs.vtt")
                .thumbnailType(ThumbnailDataTrack.TYPE_WEBVTT_INDEX)
        .get());
    }}
    ...
    intent.putParcelableArrayList(SdkConsts.INTENT_SIDELOADED_TRACKS_ARRAYLIST, data);

The `ThumbnailBuilder` also provides methods for configuring extra fields necessary for other thumbnail formats, such as gridded JPEG template:

    ArrayList<SideloadedTrack> data = new ArrayList<SideloadedTrack>(){{
        add(new SideloadedTrack.ThumbnailBuilder()
                .url("http://example.com/content/thumbs/$index$.jpg")
                .gridHeight(4)
                .gridWidth(5)
                .thumbnailType(ThumbnailDataTrack.TYPE_JPEG_TEMPLATE)
                .intervalMs(10_000)
        .get());
    }}
    ...
    intent.putParcelableArrayList(ThumbsPlugin.INTENT_SIDELOADED_TRACKS_ARRAYLIST, data);

This will create a data object and add it to the intent. Note that we are specifying the type explicitly here. This is not strictly necessary and the plugin will try to infer the type from the URL extension, i.e. .vtt vs. .bif vs. .jpg.

With the data object added to the intent, an implementation of `ThumbnailProvider` will be created automatically and is exposed as a component of the `PlayerController`. You can access the provider instance using `PlayerController.getComponent()`. For example:

    ThumbnailProvider provider = playerController.getComponent(ThumbnailProvider.class);

The `ThumbnailProvider` interface is the main interaction point to get access to thumbnails. It provides a `getThumbnail` method that asynchronously loads a thumbnail for the requested position and provides it back the callback implementation that is passed to the method. It supports performing multiple concurrent `getThumbnail` calls. Thumbnails can also be requested with a time tolerance. Check the Thumbnail rendering time tolerance section for more details.

At this point a view implementation can use the provider and a callback to get a handle on the Bitmap and show it on screen. The PRESTOplay SDK for Android already bundles a simple view implementation with a relatively flexible way to render and position a thumbnail.

### Using the built-in thumbnails view

If you registered the thumbnails plugin and enabled the usage of the internal view component, you do not need to create a view or interact with the provider explicitly. Instead, you add your `ThumbnailData` to the Intent Bundle and once a PlayerView is initialized, you can access the thumbnail view component and show or hide thumbnails on to of your player view.

In order to properly render the thumbnails, you’ll need to register a `SeekBarListener` to the `PlayerControllerView`. This listener will be invoked whenever there’s a scrubbing event on the Seekbar, so you can implement your logic regarding thumbnail rendering.

You can also specify a third parameter to fine-tune which Thumbnail should be fetched in relation to the requested time. More info about this parameter is available in the Thumbnail index selection section.

Here you can see a sample implementation.

    public void onSeekbarScrubbed(long positionUs, double seekBarProgressPercent) {
        ThumbsPlugin.ThumbnailViewComponent thumbsView = playerView.getComponent(
                ThumbsPlugin.ThumbnailViewComponent.class);
        if (thumbsView != null){
            thumbsView.show(positionUs, new DefaultThumbnailView.Callback() {
                @Override
                public void getThumbnailRect(Rect output, DefaultThumbnailView.ThumbnailInfo info, boolean isSmallScreen) {
                    ViewGroup videoView = playerView.getVideoView();
                    output.set(
                            videoView.getLeft(),
                            videoView.getTop(),
                            videoView.getRight(),
                            videoView.getBottom());
                }
            }, ThumbsPlugin.THUMBNAIL_INDEX_CURRENT);
        }
    }

    @Override
    public void onSeekbarReleased() {
        final ThumbsPlugin.ThumbnailViewComponent thumbsView = playerView.getComponent(
                ThumbsPlugin.ThumbnailViewComponent.class);
        if (thumbsView != null){
            thumbsView.hide();
        }
    }

The example above demonstrates the basic interactions with the `ThumbnailViewComponent`. Here we assume we have to methods, one that is called when a Seekbar is scrubbed and thumbnails should be shown, and the counterpart that is triggered when scrubbing stops and the thumbnails should be hidden. Hiding is relatively simple and a matter of calling the `hide()` method. Showing the thumbnails is slightly more complex. We call the `show()` method and pass two parameters: the time in microseconds for which we would like to receive a thumbnail and a `Callback` implementation. The callback is triggered once the Bitmap data are loaded. It its called with size information about the thumbnail as well as an `output` rectangle. The `output` rectangle needs to be filled with the coordinates and size of the desired thumbnail. The coordinates are relative to the thumbnail view container, but the default view container has the same dimensions as the player view. The example above uses the exposed video view to place the thumbnail image full-screen above the video, but treat this as a simple example. You can use the `output` rectangle to customize the size and the position of the resulting thumbnail.

The returned Thumbnail might not be the corresponding one for the requested position, as the `DefaultThumbnailView` uses the `getThumbnail` API defining some tolerance. It is recommended that this is the behaviour used as it improves the perceived responsibility. Nevertheless, this is a configurable setting on the `DefaultThumbnailView` and you may change it through `DefaultThumbnailView.setThumbnailTolerance(long)`.

The `DefaultThumbnailView` will automatically be created if you use a `PlayerView`.

If you don’t want to use a `PlayerView` but still decide to use the `DefaultThumbnailView` available in the PRESTOplay SDK for Android, you can create it yourself, either programmatically or by defining it in an xml layout file. If you use the latest approach, you must pass your layout View to `PlayerController.setComponentView(int, android.view.View)` with the corresponding id, defined in `PRESTO_DEFAULT_THUMBNAIL_VIEW`, or `R.id.presto_default_thumbnail_view` so the `ThumbsPlugin` can properly find the `DefaultThumbnailView`.

### Thumbnail rendering time tolerance

In order to benefit from the several loading Waves approach, the `ThumbsPlugin` provides an API to return a close neighbour of the desired thumbnail if its data is already available.

This tolerance represents the maximum difference of time time between the position of the requested thumbnail and that of a potentially already-loaded thumbnail in the index. If a matching nearby thumbnail with data within the specified tolerance is found, it will be returned immediately. Otherwise, the exact thumbnail will be scheduled for fetching.

By default, the `DefaultThumbnailView` performs thumbnail requests with some tolerance, which can be changed through `DefaultThumbnailView.setThumbnailTolerance(long)`.

If you’re performing direct thumbnail requests through a `ThumbnailProvider`, you can specify a tolerance with the `ThumbnailProvider.getThumbnail(long, com.castlabs.sdk.thumbs.ThumbnailProvider$Callback, int, long)` method.

### Thumbnail index selection

When using the `ThumbnailViewComponent`, it’s possible to pass a third parameter to the `show()` method in order to determine which Thumbnail should be returned, relative to the requested media time.

There are three possible values:

- `ThumbsPlugin.THUMBNAIL_INDEX_CURRENT`: This corresponds to the thumbnail with the highest media time that is lower than the requested position.

- `ThumbsPlugin.THUMBNAIL_INDEX_NEXT`: This corresponds to the thumbnail with the lowest media time that is higher than the requested position.

- `ThumbsPlugin.THUMBNAIL_INDEX_CLOSEST`: This corresponds to the thumbnail with the lowest difference between its media time and the requested position.

The following scheme can better illustrate the behaviour. The example assumes Thumbnails are available every 10 seconds, starting from the beginning (media time 0). The top marker represents the requested time, that being the first parameter to the `ThumbnailViewComponent.show(...)` call, and the ones below the timeline, the Thumbnail times for each indexing type:

    Requested Thumbnail for position 4

              0   v     10        20        30
    Return    |---------|---------|---------|-----
    Current:  ^
    Closest:  ^
    Next:               ^

    Requested Thumbnail for position 6

              0     v   10        20        30
    Return    |---------|---------|---------|-----
    Current:  ^
    Closest:            ^
    Next:               ^

    Requested Thumbnail for position 18

              0         10      v 20        30
    Return    |---------|---------|---------|-----
    Current:            ^
    Closest:                      ^
    Next:                         ^

### Downloader integration

The thumbnails plugin is integrated with the Downloader Plugin, hence there is offline support for thumbnails as well. This is currently limited to BIF and WebVTT thumbnails. Just add the `ThumbnailData` to the Intent that is used to initiate the download and the thumbnails will be fetched and downloaded as well. When you start the local playback, pass the same `ThumbnailData` to the local playback intent. The player will translate any remote URLs automatically to the correct local files and relative URLs will still resolve correctly, now relative to the local manifest.

### Thumbnail loading details

The thumbnail plugin can preload thumbnails in the background in order for them to be ready as much a possible whenever a request comes in.

The background loader is multi-threaded, and the number of threads is configurable through the `ThumbsPlugin.setThumbnailLoadThreads(int)` static method.

Whenever a specific thumbnail request (either by asking the `DefaultThumbnailView` to show a thumbnail for a time, or through one of the `getThumbnail` methods) is issued, it will skip the pending queue of background thumbnail loads in order to be as responsive as possible. Successive specific requests will be queued and executed in a FIFO fashion. To clear this queue of pending specific thumbnail requests, the following method can be used: `ThumbnailProvider.cancelPendingRequests()`.

### Standalone Thumbnail providers

It is possible to obtain an instance of a `ThumbnailProvider` without using a `PlayerController` instance which will allow for fetching thumbnails independently of any ongoing playback, even for completely different content.

In order to obtain a `StandaloneThumbnailProvider` to fetch embedded DASH thumbnails use `StandaloneThumbnailFactory.getProvider`:

    StandaloneThumbnailProvider provider = StandaloneThumbnailFactory.getProvider(
        new PlayerConfig.Builder("https://example.com/manifest.mpd").get());

    // Add Broadpeak support if needed
    provider.addExtension(new BroadpeakSdkElementExtension());

    // Fetch thumbnails
    Future<ThumbnailProvider.ThumbnailResult> thumbnailResultFuture = provider.getThumbnail(30_000_000L, ThumbsPlugin.THUMBNAIL_INDEX_CURRENT);
    Bitmap thumbnailBitmap = thumbnailResultFuture.get().thumbnail;

    // Free up resources
    provider.destroy();

In case the provided DASH manifest is a live stream manifest updates will be performed in the background resulting in the thumbnail index also being updated alongside. To get updates of this process it is possible to register a `IndexRefreshListener`:

    provider.addIndexRefreshListener(new ThumbnailProvider.IndexRefreshListener() {
        @Override
        public void onIndexRefreshed(@NonNull ThumbnailProvider provider) {
            // Index has been refreshed. Fetch thumbnail for a given time
            Future<ThumbnailProvider.ThumbnailResult> thumbRequest = provider.getThumbnail(position, ThumbsPlugin.THUMBNAIL_INDEX_CURRENT);
        }
    });

It is also possible to get thumbnails out of a VTT or JPG Template `SideloadedTrack`:

    StandaloneThumbnailProvider provider = StandaloneThumbnailFactory.getProvider(new SideloadedTrack.ThumbnailBuilder()
                .url("https://demo.castlabs.com/media/QA/tos_thumbs/$index$.jpg")
                .gridHeight(1)
                .gridWidth(1)
                .thumbnailType(ThumbnailDataTrack.TYPE_JPEG_TEMPLATE)
                .intervalMs(5_000)
            .get());

## 360-Degree Playback Plugin

The PRESTOplay SDK for Android can be used with the optional 360 Degree player plugin to enable 360 playback using the PRESTOplay SDK for Android.

The plugin is distributed with the PRESTOplay SDK for Android. You can reference and load the 360 plugin as a separate dependency:

    dependencies {
        ...
        compile 'com.castlabs.player:360-plugin:4.3.2'
        ...
    }

Before you can use this plugin, you have to register it before you initialize the SDK:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new ThreesixtyPlugin());
            PlayerSDK.init(getApplicationContext());
        }
    }

### Google Cardboard

The `PlayerView360` is an extension of the default PlayerView. You can add it as a view component to your own activity. The view exposes the underlying GvrView which needs to be passed to the Google VR SDK in your activity.

You can use the PlayerView360 in your own Activity (that usually extends GvrActivity). The PlayerView360 will handle all the transformations required to render the view.

An example of this is the CardboardActivity class in the ‘threesixty_demo’ sample app.

## Google cast Manager

The PRESTOplay SDK for Android contains the `GoogleCastManager` class that will ease the process of starting and managing remote cast session.

This class allows to start a cast session, get the current remote player state and select audio, video and subtitle tracks.

## AndroidX Media2

`MediaSessionPlugin` integrates PRESTOplay SDK for Android with AndroidX Media2 Session APIs providing easy to use Media2 functionality. The application does not need to create and maintain MediaSession instance, it is only responsible for Media Session lifecycle i.e. when Media Session is created and optionally when it is destroyed. First, `MediaSessionPlugin` shall be enabled before PRESTOplay SDK for Android initialization:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new MediaSessionPlugin());
            PlayerSDK.init(getApplicationContext());
        }
    }

Registering the plugin does not create Media Session yet and the application will need to explicitly request its creation by calling `MediaSessionPlugin.enableMediaSession()`. Media Session is linked to the `PlayerController` and therefore the application has to provide `PlayerController` instance when enabling Media Session. `MediaSessionPlugin` supports both `PlayerController` and `SingleControllerPlaylist` instances. Media Session can be enabled any time before or after opening the playback and the only constraint is the presence of a valid `PlayerController` instance.

The code below enables Media Session when `PlayerController` is created and before the playback is opened:

    public class SimplePlaybackDemo extends Activity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            // ...
            PlayerView playerView = (PlayerView) findViewById(R.id.player_view);

            MediaSessionPlugin.enableMediaSession(playerView.getPlayerController());

            // ...
            PlayerConfig playerConfig;
            // playerConfig = ...
            playerController.open(playerConfig);
        }

        @Override
        protected void onResume() {
            super.onResume();
            // ...
            PlayerView playerView = (PlayerView) findViewById(R.id.player_view);

            MediaSessionPlugin.enableMediaSession(playerView.getPlayerController());
            playerView.getLifecycleDelegate().resume();
        }
    }

Media Session is closed automatically upon `PlayerController.destroy()`. However, it is also possible to close Media Session explicitly:

    // ...
    PlayerView playerView = (PlayerView) findViewById(R.id.player_view);
    MediaSessionPlugin.disableMediaSession(playerView.getPlayerController());
    // ...

MediaSession can also be customized according to the application needs e.g. default seek values or callbacks can be installed:

    final MediaSessionBuilder mediaSessionBuilder = new MediaSessionBuilder()
                        .setFastForwardIncrementMs(10000)
                        .setRewindIncrementMs(10000);
    // ...
    MediaSessionPlugin.enableMediaSession(playerView.getPlayerController(), mediaSessionBuilder);
    // ...

## Drm Device Time Checker

The PRESTOplay SDK for Android contains the `DrmDeviceTimeCheckerPlugin` Plugin which is able to perform periodic checks related to DRM licensing in order to minimize some Widevine limitations.

The plugin is distributed with the PRESTOplay SDK for Android. You can reference and load the Device Time Checker plugin as a separate dependency:

    dependencies {
        ...
        compile 'com.castlabs.player:drm-device-time-checker-plugin:4.3.2'
        ...
    }

Before you can use this plugin, you have to register it before you initialize the SDK:

    public class MyApp extends Application {
        @Override
        public void onCreate() {
            super.onCreate();

            PlayerSDK.register(new DrmDeviceTimeCheckerPlugin());
            PlayerSDK.init(getApplicationContext());
        }
    }

Optionally, you can specify the time period at which he license checks should be performed. Default value is every 5 minutes.

    // ...
    PlayerSDK.register(new DrmDeviceTimeCheckerPlugin(60)); // Check every minute
    // ...

This plugin needs two extra Android permissions. These permissions allow to internally keep track of license times.

> - `ACTION_BOOT_COMPLETED`

> - `ACTION_TIME_CHANGED`

These permissions are automatically added to your AndroidManifest file once you include this plugin in your build file.

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