Pass in initial sample timestamp to FakeSampleStream.

This allows to simulate samples in a stream more accurately
particularly when streams are prepared at a non-zero position and
issuing a sample with position=0 is not expected.

Also makes seek more realistic by also issuing one sample again.

PiperOrigin-RevId: 293344081

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

@@ -609,6 +609,7 @@ public final class AnalyticsCollectorTest {
                     concatenatedMediaSource.moveMediaSource(
                         /* currentIndex= */ 0, /* newIndex= */ 1))
             .waitForTimelineChanged()
+            .waitForPlaybackState(Player.STATE_READY)
             .play()
             .build();
     TestAnalyticsListener listener = runAnalyticsTest(concatenatedMediaSource, actionSchedule);
@@ -624,6 +625,7 @@ public final class AnalyticsCollectorTest {
             window0Period1Seq0 /* setPlayWhenReady=false */,
             period1Seq0 /* setPlayWhenReady=true */,
             period1Seq0 /* BUFFERING */,
+            period1Seq0 /* READY */,
             period1Seq0 /* ENDED */);
     assertThat(listener.getEvents(EVENT_TIMELINE_CHANGED))
         .containsExactly(
@@ -659,8 +661,10 @@ public final class AnalyticsCollectorTest {
         .containsExactly(window0Period1Seq0, window1Period0Seq1);
     assertThat(listener.getEvents(EVENT_DECODER_DISABLED)).containsExactly(window0Period1Seq0);
     assertThat(listener.getEvents(EVENT_DROPPED_VIDEO_FRAMES)).containsExactly(window0Period1Seq0);
-    assertThat(listener.getEvents(EVENT_VIDEO_SIZE_CHANGED)).containsExactly(window0Period1Seq0);
+    assertThat(listener.getEvents(EVENT_VIDEO_SIZE_CHANGED))
-    assertThat(listener.getEvents(EVENT_RENDERED_FIRST_FRAME)).containsExactly(window0Period1Seq0);
+        .containsExactly(window0Period1Seq0, period1Seq0);
+    assertThat(listener.getEvents(EVENT_RENDERED_FIRST_FRAME))
+        .containsExactly(window0Period1Seq0, period1Seq0);
     listener.assertNoMoreEvents();
   }
 

library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java

@@ -145,6 +145,7 @@ public class MetadataRendererTest {
         new FakeSampleStream(
             EMSG_FORMAT,
             /* eventDispatcher= */ null,
+            /* firstSampleTimeUs= */ 0,
             /* timeUsIncrement= */ 0,
             new FakeSampleStreamItem(input),
             FakeSampleStreamItem.END_OF_STREAM_ITEM),

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

@@ -142,7 +142,7 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
 
   @Override
   protected SampleStream createSampleStream(
-      TrackSelection trackSelection, EventDispatcher eventDispatcher) {
+      long positionUs, TrackSelection trackSelection, EventDispatcher eventDispatcher) {
     FakeChunkSource chunkSource =
         chunkSourceFactory.createChunkSource(trackSelection, durationUs, transferListener);
     return new ChunkSampleStream<>(
@@ -152,7 +152,7 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
         chunkSource,
         /* callback= */ this,
         allocator,
-        /* positionUs= */ 0,
+        positionUs,
         /* drmSessionManager= */ DrmSessionManager.getDummyDrmSessionManager(),
         new DefaultLoadErrorHandlingPolicy(/* minimumLoadableRetryCount= */ 3),
         eventDispatcher);

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

@@ -171,7 +171,7 @@ public class FakeMediaPeriod implements MediaPeriod {
         int indexInTrackGroup = selection.getIndexInTrackGroup(selection.getSelectedIndex());
         assertThat(indexInTrackGroup).isAtLeast(0);
         assertThat(indexInTrackGroup).isLessThan(trackGroup.length);
-        streams[i] = createSampleStream(selection, eventDispatcher);
+        streams[i] = createSampleStream(positionUs, selection, eventDispatcher);
         sampleStreams.add(streams[i]);
         streamResetFlags[i] = true;
       }
@@ -241,15 +241,17 @@ public class FakeMediaPeriod implements MediaPeriod {
   /**
    * Creates a sample stream for the provided selection.
    *
+   * @param positionUs The position at which the tracks were selected, in microseconds.
    * @param selection A selection of tracks.
    * @param eventDispatcher A dispatcher for events that should be used by the sample stream.
    * @return A {@link SampleStream} for this selection.
    */
   protected SampleStream createSampleStream(
-      TrackSelection selection, EventDispatcher eventDispatcher) {
+      long positionUs, TrackSelection selection, EventDispatcher eventDispatcher) {
     return new FakeSampleStream(
         selection.getSelectedFormat(),
         eventDispatcher,
+        positionUs,
         /* timeUsIncrement= */ 0,
         FakeSampleStream.SINGLE_SAMPLE_THEN_END_OF_STREAM);
   }
@@ -258,16 +260,13 @@ public class FakeMediaPeriod implements MediaPeriod {
    * Seeks inside the given sample stream.
    *
    * @param sampleStream A sample stream that was created by a call to {@link
-   *     #createSampleStream(TrackSelection, EventDispatcher)}.
+   *     #createSampleStream(long, TrackSelection, EventDispatcher)}.
    * @param positionUs The position to seek to, in microseconds.
    */
   protected void seekSampleStream(SampleStream sampleStream, long positionUs) {
-    if (positionUs == 0) {
+    // Queue a single sample from the seek position again.
-      // When seeking back to 0, queue our single sample at time 0 again.
     ((FakeSampleStream) sampleStream)
-          .resetSampleStreamItems(
+        .resetSampleStreamItems(positionUs, FakeSampleStream.SINGLE_SAMPLE_THEN_END_OF_STREAM);
-              /* timeUs= */ 0, FakeSampleStream.SINGLE_SAMPLE_THEN_END_OF_STREAM);
-    }
   }
 
   private void finishPreparation() {

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

@@ -91,7 +91,7 @@ public final class FakeSampleStream implements SampleStream {
   @Nullable private final EventDispatcher eventDispatcher;
 
   private Format format;
-  private int timeUs;
+  private long timeUs;
   private boolean readFormat;
   private boolean readEOSBuffer;
 
@@ -108,6 +108,7 @@ public final class FakeSampleStream implements SampleStream {
     this(
         format,
         eventDispatcher,
+        /* firstSampleTimeUs= */ 0,
         /* timeUsIncrement= */ 0,
         shouldOutputSample
             ? SINGLE_SAMPLE_THEN_END_OF_STREAM
@@ -120,6 +121,7 @@ public final class FakeSampleStream implements SampleStream {
    *
    * @param format The {@link Format} to output.
    * @param eventDispatcher An {@link EventDispatcher} to notify of read events.
+   * @param firstSampleTimeUs The time at which samples will start being output, in microseconds.
    * @param timeUsIncrement The time each sample should increase by, in microseconds.
    * @param fakeSampleStreamItems The {@link FakeSampleStreamItem items} to customize the return
    *     values of {@link #readData(FormatHolder, DecoderInputBuffer, boolean)}. Note that once an
@@ -128,11 +130,13 @@ public final class FakeSampleStream implements SampleStream {
   public FakeSampleStream(
       Format format,
       @Nullable EventDispatcher eventDispatcher,
+      long firstSampleTimeUs,
       int timeUsIncrement,
       FakeSampleStreamItem... fakeSampleStreamItems) {
     this.format = format;
     this.eventDispatcher = eventDispatcher;
     this.fakeSampleStreamItems = new ArrayDeque<>(Arrays.asList(fakeSampleStreamItems));
+    this.timeUs = firstSampleTimeUs;
     this.timeUsIncrement = timeUsIncrement;
   }
 
@@ -142,7 +146,7 @@ public final class FakeSampleStream implements SampleStream {
    * @param timeUs The time at which samples will start being output, in microseconds.
    * @param fakeSampleStreamItems The {@link FakeSampleStreamItem items} to provide.
    */
-  public void resetSampleStreamItems(int timeUs, FakeSampleStreamItem... fakeSampleStreamItems) {
+  public void resetSampleStreamItems(long timeUs, FakeSampleStreamItem... fakeSampleStreamItems) {
     this.fakeSampleStreamItems.clear();
     this.fakeSampleStreamItems.addAll(Arrays.asList(fakeSampleStreamItems));
     this.timeUs = timeUs;