Split AnalyticsCollector in interface and default Impl

This will allow R8 to strip out the implementation
if it is not needed for an app.

#minor-release

PiperOrigin-RevId: 427983730

RELEASENOTES.md

@@ -54,6 +54,8 @@
         `ExoPlayer.Builder.setUsePlatformDiagnostics(false)`.
     *   Updated some `AnalyticsListener.EventFlags` constant values to match
         values in `Player.EventFlags`.
+    *   Split `AnalyticsCollector` into an interface and default implementation
+        to allow it to be stripped by R8 if an app doesn't need it.
 *   Android 12 compatibility:
     *   Upgrade the Cast extension to depend on
         `com.google.android.gms:play-services-cast-framework:20.1.0`. Earlier

docs/analytics.md

@@ -225,16 +225,16 @@ new PlaybackStatsListener(
 
 In case you need to add custom events to the analytics data, you need to save
 these events in your own data structure and combine them with the reported
-`PlaybackStats` later. If it helps, you can extend `AnalyticsCollector` to be
+`PlaybackStats` later. If it helps, you can extend `DefaultAnalyticsCollector`
-able to generate `EventTime` instances for your custom events and send them to
+to be able to generate `EventTime` instances for your custom events and send
-the already registered listeners as shown in the following example.
+them to the already registered listeners as shown in the following example.
 
 ~~~
 interface ExtendedListener extends AnalyticsListener {
   void onCustomEvent(EventTime eventTime);
 }
 
-class ExtendedCollector extends AnalyticsCollector {
+class ExtendedCollector extends DefaultAnalyticsCollector {
  public void customEvent() {
    EventTime eventTime = generateCurrentPlayerMediaPeriodEventTime();
    sendEvent(eventTime, CUSTOM_EVENT_ID, listener -> {

library/core/src/main/java/com/google/android/exoplayer2/ExoPlayer.java

@@ -32,6 +32,7 @@ import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.analytics.AnalyticsCollector;
 import com.google.android.exoplayer2.analytics.AnalyticsListener;
+import com.google.android.exoplayer2.analytics.DefaultAnalyticsCollector;
 import com.google.android.exoplayer2.audio.AudioAttributes;
 import com.google.android.exoplayer2.audio.AudioSink;
 import com.google.android.exoplayer2.audio.AuxEffectInfo;
@@ -565,7 +566,7 @@ public interface ExoPlayer extends Player {
       this.analyticsCollectorSupplier =
           analyticsCollectorSupplier != null
               ? analyticsCollectorSupplier
-              : () -> new AnalyticsCollector(checkNotNull(clock));
+              : () -> new DefaultAnalyticsCollector(checkNotNull(clock));
       looper = Util.getCurrentOrMainLooper();
       audioAttributes = AudioAttributes.DEFAULT;
       wakeMode = C.WAKE_MODE_NONE;

library/core/src/test/java/com/google/android/exoplayer2/MediaPeriodQueueTest.java

@@ -25,6 +25,7 @@ import android.os.Looper;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.analytics.AnalyticsCollector;
+import com.google.android.exoplayer2.analytics.DefaultAnalyticsCollector;
 import com.google.android.exoplayer2.analytics.PlayerId;
 import com.google.android.exoplayer2.source.MediaSource.MediaPeriodId;
 import com.google.android.exoplayer2.source.MediaSource.MediaSourceCaller;
@@ -77,7 +78,7 @@ public final class MediaPeriodQueueTest {
 
   @Before
   public void setUp() {
-    AnalyticsCollector analyticsCollector = new AnalyticsCollector(Clock.DEFAULT);
+    AnalyticsCollector analyticsCollector = new DefaultAnalyticsCollector(Clock.DEFAULT);
     analyticsCollector.setPlayer(
         new ExoPlayer.Builder(ApplicationProvider.getApplicationContext()).build(),
         Looper.getMainLooper());

library/core/src/test/java/com/google/android/exoplayer2/MediaSourceListTest.java

@@ -29,6 +29,7 @@ import android.os.Looper;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.analytics.AnalyticsCollector;
+import com.google.android.exoplayer2.analytics.DefaultAnalyticsCollector;
 import com.google.android.exoplayer2.analytics.PlayerId;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.source.ShuffleOrder;
@@ -55,7 +56,7 @@ public class MediaSourceListTest {
 
   @Before
   public void setUp() {
-    AnalyticsCollector analyticsCollector = new AnalyticsCollector(Clock.DEFAULT);
+    AnalyticsCollector analyticsCollector = new DefaultAnalyticsCollector(Clock.DEFAULT);
     analyticsCollector.setPlayer(
         new ExoPlayer.Builder(ApplicationProvider.getApplicationContext()).build(),
         Looper.getMainLooper());

library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultAnalyticsCollectorTest.java

@@ -55,12 +55,12 @@ import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyFloat;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.argThat;
+import static org.mockito.ArgumentMatchers.same;
 import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.same;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 
@@ -134,11 +134,11 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.InOrder;
 import org.robolectric.shadows.ShadowLooper;
 
-/** Integration test for {@link AnalyticsCollector}. */
+/** Integration test for {@link DefaultAnalyticsCollector}. */
 @RunWith(AndroidJUnit4.class)
-public final class AnalyticsCollectorTest {
+public final class DefaultAnalyticsCollectorTest {
 
-  private static final String TAG = "AnalyticsCollectorTest";
+  private static final String TAG = "DefaultAnalyticsCollectorTest";
 
   // Deprecated event constants.
   private static final long EVENT_PLAYER_STATE_CHANGED = 1L << 63;
@@ -193,14 +193,14 @@ public final class AnalyticsCollectorTest {
   private EventWindowAndPeriodId window1Period0Seq1;
 
   @Test
-  public void analyticsCollector_overridesAllPlayerListenerMethods() throws Exception {
+  public void defaultAnalyticsCollector_overridesAllPlayerListenerMethods() throws Exception {
     // Verify that AnalyticsCollector forwards all Player.Listener methods to AnalyticsListener.
     for (Method method : Player.Listener.class.getDeclaredMethods()) {
       assertThat(
-              AnalyticsCollector.class
+              DefaultAnalyticsCollector.class
                   .getMethod(method.getName(), method.getParameterTypes())
                   .getDeclaringClass())
-          .isEqualTo(AnalyticsCollector.class);
+          .isEqualTo(DefaultAnalyticsCollector.class);
     }
   }
 
@@ -1964,7 +1964,7 @@ public final class AnalyticsCollectorTest {
 
   @Test
   public void recursiveListenerInvocation_arrivesInCorrectOrder() {
-    AnalyticsCollector analyticsCollector = new AnalyticsCollector(Clock.DEFAULT);
+    AnalyticsCollector analyticsCollector = new DefaultAnalyticsCollector(Clock.DEFAULT);
     analyticsCollector.setPlayer(
         new ExoPlayer.Builder(ApplicationProvider.getApplicationContext()).build(),
         Looper.myLooper());

testutils/src/main/java/com/google/android/exoplayer2/testutil/TestExoPlayerBuilder.java

@@ -26,7 +26,7 @@ import com.google.android.exoplayer2.LoadControl;
 import com.google.android.exoplayer2.Renderer;
 import com.google.android.exoplayer2.RenderersFactory;
 import com.google.android.exoplayer2.SimpleExoPlayer;
-import com.google.android.exoplayer2.analytics.AnalyticsCollector;
+import com.google.android.exoplayer2.analytics.DefaultAnalyticsCollector;
 import com.google.android.exoplayer2.source.MediaSource;
 import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.upstream.BandwidthMeter;
@@ -300,7 +300,7 @@ public class TestExoPlayerBuilder {
             .setTrackSelector(trackSelector)
             .setLoadControl(loadControl)
             .setBandwidthMeter(bandwidthMeter)
-            .setAnalyticsCollector(new AnalyticsCollector(clock))
+            .setAnalyticsCollector(new DefaultAnalyticsCollector(clock))
             .setClock(clock)
             .setUseLazyPreparation(useLazyPreparation)
             .setLooper(looper)