Depend on the IMA extension in noExtensions variant

Also use the cronet extension in the demo app.

PiperOrigin-RevId: 322108530

RELEASENOTES.md

@@ -250,7 +250,10 @@
     *   Migrate to new 'friendly obstruction' IMA SDK APIs, and allow apps to
         register a purpose and detail reason for overlay views via
         `AdsLoader.AdViewProvider`.
-*   Demo app: Retain previous position in list of samples.
+*   Demo app:
+    *   Retain previous position in list of samples.
+    *   Replace the `extensions` variant with `decoderExtensions` and make the
+        demo app use the Cronet and IMA extensions by default.
 *   Add Guava dependency.
 
 ### 2.11.7 (2020-06-29) ###

demos/main/build.gradle

@@ -50,14 +50,14 @@ android {
         disable 'GoogleAppIndexingWarning','MissingTranslation','IconDensities'
     }
 
-    flavorDimensions "extensions"
+    flavorDimensions "decoderExtensions"
 
     productFlavors {
-        noExtensions {
+        noDecoderExtensions {
-            dimension "extensions"
+            dimension "decoderExtensions"
         }
-        withExtensions {
+        withDecoderExtensions {
-            dimension "extensions"
+            dimension "decoderExtensions"
         }
     }
 }
@@ -72,13 +72,14 @@ dependencies {
     implementation project(modulePrefix + 'library-hls')
     implementation project(modulePrefix + 'library-smoothstreaming')
     implementation project(modulePrefix + 'library-ui')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-av1')
+    implementation project(modulePrefix + 'extension-cronet')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-ffmpeg')
+    implementation project(modulePrefix + 'extension-ima')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-flac')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-av1')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-ima')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-ffmpeg')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-opus')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-flac')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-vp9')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-opus')
-    withExtensionsImplementation project(path: modulePrefix + 'extension-rtmp')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-vp9')
+    withDecoderExtensionsImplementation project(modulePrefix + 'extension-rtmp')
 }
 
 apply plugin: 'com.google.android.gms.strict-version-matcher-plugin'

demos/main/proguard-rules.txt

@@ -1,7 +1,2 @@
 # Proguard rules specific to the main demo app.
 
-# Constructor accessed via reflection in PlayerActivity
--dontnote com.google.android.exoplayer2.ext.ima.ImaAdsLoader
--keepclassmembers class com.google.android.exoplayer2.ext.ima.ImaAdsLoader {
-  <init>(android.content.Context, android.net.Uri);
-}

demos/main/src/main/java/com/google/android/exoplayer2/demo/DemoApplication.java

@@ -20,13 +20,14 @@ import com.google.android.exoplayer2.DefaultRenderersFactory;
 import com.google.android.exoplayer2.RenderersFactory;
 import com.google.android.exoplayer2.database.DatabaseProvider;
 import com.google.android.exoplayer2.database.ExoDatabaseProvider;
+import com.google.android.exoplayer2.ext.cronet.CronetDataSourceFactory;
+import com.google.android.exoplayer2.ext.cronet.CronetEngineWrapper;
 import com.google.android.exoplayer2.offline.ActionFileUpgradeUtil;
 import com.google.android.exoplayer2.offline.DefaultDownloadIndex;
 import com.google.android.exoplayer2.offline.DownloadManager;
 import com.google.android.exoplayer2.ui.DownloadNotificationHelper;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
-import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
 import com.google.android.exoplayer2.upstream.cache.Cache;
 import com.google.android.exoplayer2.upstream.cache.CacheDataSource;
@@ -50,8 +51,7 @@ public class DemoApplication extends MultiDexApplication {
   private static final String DOWNLOAD_TRACKER_ACTION_FILE = "tracked_actions";
   private static final String DOWNLOAD_CONTENT_DIRECTORY = "downloads";
 
-  protected String userAgent;
+  private HttpDataSource.Factory httpDataSourceFactory;
-
   private DatabaseProvider databaseProvider;
   private File downloadDirectory;
   private Cache downloadCache;
@@ -62,24 +62,26 @@ public class DemoApplication extends MultiDexApplication {
   @Override
   public void onCreate() {
     super.onCreate();
-    userAgent = Util.getUserAgent(this, "ExoPlayerDemo");
+    CronetEngineWrapper cronetEngineWrapper = new CronetEngineWrapper(/* context= */ this);
+    String userAgent = Util.getUserAgent(this, "ExoPlayerDemo");
+    httpDataSourceFactory =
+        new CronetDataSourceFactory(
+            cronetEngineWrapper,
+            Executors.newSingleThreadExecutor(),
+            /* transferListener= */ null,
+            userAgent);
   }
 
   /** Returns a {@link DataSource.Factory}. */
   public DataSource.Factory buildDataSourceFactory() {
     DefaultDataSourceFactory upstreamFactory =
-        new DefaultDataSourceFactory(this, buildHttpDataSourceFactory());
+        new DefaultDataSourceFactory(/* context= */ this, httpDataSourceFactory);
     return buildReadOnlyCacheDataSource(upstreamFactory, getDownloadCache());
   }
 
-  /** Returns a {@link HttpDataSource.Factory}. */
-  public HttpDataSource.Factory buildHttpDataSourceFactory() {
-    return new DefaultHttpDataSourceFactory(userAgent);
-  }
-
   /** Returns whether extension renderers should be used. */
   public boolean useExtensionRenderers() {
-    return "withExtensions".equals(BuildConfig.FLAVOR);
+    return "withDecoderExtensions".equals(BuildConfig.FLAVOR);
   }
 
   public RenderersFactory buildRenderersFactory(boolean preferExtensionRenderer) {
@@ -112,7 +114,7 @@ public class DemoApplication extends MultiDexApplication {
     return downloadTracker;
   }
 
-  protected synchronized Cache getDownloadCache() {
+  private synchronized Cache getDownloadCache() {
     if (downloadCache == null) {
       File downloadContentDirectory = new File(getDownloadDirectory(), DOWNLOAD_CONTENT_DIRECTORY);
       downloadCache =
@@ -130,10 +132,10 @@ public class DemoApplication extends MultiDexApplication {
           DOWNLOAD_TRACKER_ACTION_FILE, downloadIndex, /* addNewDownloadsAsCompleted= */ true);
       downloadManager =
           new DownloadManager(
-              this,
+              /* context= */ this,
               getDatabaseProvider(),
               getDownloadCache(),
-              buildHttpDataSourceFactory(),
+              httpDataSourceFactory,
               Executors.newFixedThreadPool(/* nThreads= */ 6));
       downloadTracker =
           new DownloadTracker(/* context= */ this, buildDataSourceFactory(), downloadManager);
@@ -171,7 +173,7 @@ public class DemoApplication extends MultiDexApplication {
     return downloadDirectory;
   }
 
-  protected static CacheDataSource.Factory buildReadOnlyCacheDataSource(
+  private static CacheDataSource.Factory buildReadOnlyCacheDataSource(
       DataSource.Factory upstreamFactory, Cache cache) {
     return new CacheDataSource.Factory()
         .setCache(cache)

demos/main/src/main/java/com/google/android/exoplayer2/demo/PlayerActivity.java

@@ -29,7 +29,6 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlaybackException;
@@ -39,6 +38,7 @@ import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.RenderersFactory;
 import com.google.android.exoplayer2.SimpleExoPlayer;
 import com.google.android.exoplayer2.audio.AudioAttributes;
+import com.google.android.exoplayer2.ext.ima.ImaAdsLoader;
 import com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.DecoderInitializationException;
 import com.google.android.exoplayer2.mediacodec.MediaCodecUtil.DecoderQueryException;
 import com.google.android.exoplayer2.source.BehindLiveWindowException;
@@ -60,7 +60,6 @@ import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.ErrorMessageProvider;
 import com.google.android.exoplayer2.util.EventLogger;
 import com.google.android.exoplayer2.util.Util;
-import java.lang.reflect.Constructor;
 import java.net.CookieHandler;
 import java.net.CookieManager;
 import java.net.CookiePolicy;
@@ -447,31 +446,6 @@ public class PlayerActivity extends AppCompatActivity
     return ((DemoApplication) getApplication()).buildDataSourceFactory();
   }
 
-  /**
-   * Returns an ads loader for the Interactive Media Ads SDK if found in the classpath, or null
-   * otherwise.
-   */
-  @Nullable
-  private AdsLoader maybeCreateAdsLoader(Uri adTagUri) {
-    // Load the extension source using reflection so the demo app doesn't have to depend on it.
-    try {
-      Class<?> loaderClass = Class.forName("com.google.android.exoplayer2.ext.ima.ImaAdsLoader");
-      // Full class names used so the lint rule triggers should any of the classes move.
-      // LINT.IfChange
-      Constructor<? extends AdsLoader> loaderConstructor =
-          loaderClass
-              .asSubclass(AdsLoader.class)
-              .getConstructor(android.content.Context.class, android.net.Uri.class);
-      // LINT.ThenChange(../../../../../../../../proguard-rules.txt)
-      return loaderConstructor.newInstance(this, adTagUri);
-    } catch (ClassNotFoundException e) {
-      // IMA extension not loaded.
-      return null;
-    } catch (Exception e) {
-      throw new RuntimeException(e);
-    }
-  }
-
   // User controls
 
   private void updateButtonVisibility() {
@@ -585,7 +559,6 @@ public class PlayerActivity extends AppCompatActivity
 
   private class AdSupportProvider implements DefaultMediaSourceFactory.AdSupportProvider {
 
-    @Nullable
     @Override
     public AdsLoader getAdsLoader(Uri adTagUri) {
       if (mediaItems.size() > 1) {
@@ -599,13 +572,9 @@ public class PlayerActivity extends AppCompatActivity
       }
       // The ads loader is reused for multiple playbacks, so that ad playback can resume.
       if (adsLoader == null) {
-        adsLoader = maybeCreateAdsLoader(adTagUri);
+        adsLoader = new ImaAdsLoader(/* context= */ PlayerActivity.this, adTagUri);
-      }
-      if (adsLoader != null) {
-        adsLoader.setPlayer(player);
-      } else {
-        showToast(R.string.ima_not_loaded);
       }
+      adsLoader.setPlayer(player);
       return adsLoader;
     }
 

demos/main/src/main/res/values/strings.xml

@@ -51,8 +51,6 @@
 
   <string name="sample_list_load_error">One or more sample lists failed to load</string>
 
-  <string name="ima_not_loaded">Playing sample without ads, as the IMA extension was not loaded</string>
-
   <string name="unsupported_ads_in_concatenation">Playing sample without ads, as ads are not supported in concatenations</string>
 
   <string name="download_start_error">Failed to start download</string>

extensions/ima/README.md

@@ -46,12 +46,10 @@ On returning to the foreground, seek to that position before preparing the new
 player instance. Finally, it is important to call `ImaAdsLoader.release()` when
 playback of the content/ads has finished and will not be resumed.
 
-You can try the IMA extension in the ExoPlayer demo app. To do this you must
+You can try the IMA extension in the ExoPlayer demo app, which has test content
-select and build one of the `withExtensions` build variants of the demo app in
+in the "IMA sample ad tags" section of the sample chooser. The demo app's
-Android Studio. You can find IMA test content in the "IMA sample ad tags"
+`PlayerActivity` also shows how to persist the `ImaAdsLoader` instance and the
-section of the app. The demo app's `PlayerActivity` also shows how to persist
+player position when backgrounded during ad playback.
-the `ImaAdsLoader` instance and the player position when backgrounded during ad
-playback.
 
 [top level README]: https://github.com/google/ExoPlayer/blob/release-v2/README.md
 [sample ad tags]: https://developers.google.com/interactive-media-ads/docs/sdks/android/tags