Add a composition export dump test with a shorter second sequence.

PiperOrigin-RevId: 669348374

libraries/test_data/src/test/assets/transformerdumps/composition/seq-sample.wav+seq-sample.wav_clipped_100ms_to_400ms.dump

@@ -0,0 +1,117 @@
+format audio:
+  averageBitrate = 131072
+  sampleMimeType = audio/mp4a-latm
+  channelCount = 1
+  sampleRate = 44100
+  pcmEncoding = 2
+sample:
+  trackType = audio
+  dataHashCode = -477126770
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 779113371
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 45842530
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 2001000243
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -187462316
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -309708822
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1030869338
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -1134039798
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -2131288947
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1159697593
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -889164698
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1380568930
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1722863050
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -1365744081
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -81471997
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -6915052
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1634845963
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = -1252305359
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 2127515647
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 2077308846
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1055925064
+  size = 4096
+  isKeyFrame = true
+sample:
+  trackType = audio
+  dataHashCode = 1077088737
+  size = 1912
+  isKeyFrame = true
+released = true

libraries/transformer/src/test/java/androidx/media3/transformer/CompositionExportTest.java

@@ -28,6 +28,7 @@ import static androidx.media3.transformer.TestUtil.addAudioEncoders;
 import static androidx.media3.transformer.TestUtil.createAudioEffects;
 import static androidx.media3.transformer.TestUtil.createTransformerBuilder;
 import static androidx.media3.transformer.TestUtil.createVolumeScalingAudioProcessor;
+import static androidx.media3.transformer.TestUtil.getCompositionDumpFilePath;
 import static androidx.media3.transformer.TestUtil.getDumpFileName;
 import static androidx.media3.transformer.TestUtil.removeEncodersAndDecoders;
 import static com.google.common.truth.Truth.assertThat;
@@ -378,6 +379,72 @@ public class CompositionExportTest {
             "48000hz"));
   }
 
+  @Test
+  public void start_firstSequenceFinishesEarly_works() throws Exception {
+    CapturingMuxer.Factory muxerFactory = new CapturingMuxer.Factory(/* handleAudioAsPcm= */ true);
+    Transformer transformer =
+        createTransformerBuilder(muxerFactory, /* enableFallback= */ false).build();
+    EditedMediaItem audioItem300ms =
+        new EditedMediaItem.Builder(
+                MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW)
+                    .buildUpon()
+                    .setClippingConfiguration(
+                        new MediaItem.ClippingConfiguration.Builder()
+                            .setStartPositionMs(100)
+                            .setEndPositionMs(400)
+                            .build())
+                    .build())
+            .build();
+    EditedMediaItem audioItem1000ms =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW)).build();
+    Composition composition =
+        new Composition.Builder(
+                new EditedMediaItemSequence(audioItem300ms),
+                new EditedMediaItemSequence(audioItem1000ms))
+            .build();
+
+    transformer.start(composition, outputDir.newFile().getPath());
+    TransformerTestRunner.runLooper(transformer);
+
+    DumpFileAsserts.assertOutput(
+        context,
+        muxerFactory.getCreatedMuxer(),
+        getCompositionDumpFilePath("seq-sample.wav+seq-sample.wav_clipped_100ms_to_400ms"));
+  }
+
+  @Test
+  public void start_secondSequenceFinishesEarly_works() throws Exception {
+    CapturingMuxer.Factory muxerFactory = new CapturingMuxer.Factory(/* handleAudioAsPcm= */ true);
+    Transformer transformer =
+        createTransformerBuilder(muxerFactory, /* enableFallback= */ false).build();
+    EditedMediaItem audioItem1000ms =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW)).build();
+    EditedMediaItem audioItem300ms =
+        new EditedMediaItem.Builder(
+                MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW)
+                    .buildUpon()
+                    .setClippingConfiguration(
+                        new MediaItem.ClippingConfiguration.Builder()
+                            .setStartPositionMs(100)
+                            .setEndPositionMs(400)
+                            .build())
+                    .build())
+            .build();
+    Composition composition =
+        new Composition.Builder(
+                new EditedMediaItemSequence(audioItem1000ms),
+                new EditedMediaItemSequence(audioItem300ms))
+            .build();
+
+    transformer.start(composition, outputDir.newFile().getPath());
+    TransformerTestRunner.runLooper(transformer);
+
+    DumpFileAsserts.assertOutput(
+        context,
+        muxerFactory.getCreatedMuxer(),
+        getCompositionDumpFilePath("seq-sample.wav+seq-sample.wav_clipped_100ms_to_400ms"));
+  }
+
   private static String getFileName(String filePath) {
     int lastSeparator = filePath.lastIndexOf("/");
     return filePath.substring(lastSeparator + 1);

libraries/transformer/src/test/java/androidx/media3/transformer/TestUtil.java

@@ -149,6 +149,15 @@ public final class TestUtil {
     return stringJoiner.toString();
   }
 
+  /** Returns the file path of the composition export dump file, based on the summary provided. */
+  public static String getCompositionDumpFilePath(String compositionSummary) {
+    return DUMP_FILE_OUTPUT_DIRECTORY
+        + "/composition/"
+        + compositionSummary
+        + "."
+        + DUMP_FILE_EXTENSION;
+  }
+
   /**
    * Adds an audio decoder for each {@linkplain MimeTypes mime type}.
    *