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Composition demo: use isLooping for background audio

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By using this setter, the duration of the background audio doesn't need
to be computed anymore. It will also repeat the audio track if the video
track is longer.

PiperOrigin-RevId: 737621668
This commit is contained in:
kimvde 2025-03-17 08:20:35 -07:00 committed by Copybara-Service
parent 343a7b054e
commit ce7bf8f76c
1 changed files with 4 additions and 16 deletions
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20
demos/composition/src/main/java/androidx/media3/demo/composition/CompositionPreviewActivity.java
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@ -221,9 +221,6 @@ public final class CompositionPreviewActivity extends AppCompatActivity {
videoEffectsBuilder.add(Presentation.createForHeight(resolutionHeight));
}
ImmutableList<Effect> videoEffects = videoEffectsBuilder.build();
// Preview requires all sequences to be the same duration, so calculate main sequence duration
// and limit background sequence duration to match.
long videoSequenceDurationUs = 0;
for (int i = 0; i < selectedMediaItems.length; i++) {
if (selectedMediaItems[i]) {
SonicAudioProcessor pitchChanger = new SonicAudioProcessor();
@ -240,7 +237,6 @@ public final class CompositionPreviewActivity extends AppCompatActivity {
/* audioProcessors= */ ImmutableList.of(pitchChanger),
/* videoEffects= */ videoEffects))
.setDurationUs(presetDurationsUs[i]);
videoSequenceDurationUs += presetDurationsUs[i];
mediaItems.add(itemBuilder.build());
}
}
@ -248,7 +244,7 @@ public final class CompositionPreviewActivity extends AppCompatActivity {
List<EditedMediaItemSequence> compositionSequences = new ArrayList<>();
compositionSequences.add(videoSequence);
if (includeBackgroundAudioTrack) {
compositionSequences.add(getAudioBackgroundSequence(Util.usToMs(videoSequenceDurationUs)));
compositionSequences.add(getAudioBackgroundSequence());
}
SonicAudioProcessor sampleRateChanger = new SonicAudioProcessor();
sampleRateChanger.setOutputSampleRateHz(8_000);
@ -264,19 +260,11 @@ public final class CompositionPreviewActivity extends AppCompatActivity {
.build();
}
private EditedMediaItemSequence getAudioBackgroundSequence(long durationMs) {
MediaItem audioMediaItem =
new MediaItem.Builder()
.setUri(AUDIO_URI)
.setClippingConfiguration(
new MediaItem.ClippingConfiguration.Builder()
.setStartPositionMs(0)
.setEndPositionMs(durationMs)
.build())
.build();
private static EditedMediaItemSequence getAudioBackgroundSequence() {
MediaItem audioMediaItem = new MediaItem.Builder().setUri(AUDIO_URI).build();
EditedMediaItem audioItem =
new EditedMediaItem.Builder(audioMediaItem).setDurationUs(59_000_000).build();
return new EditedMediaItemSequence.Builder(audioItem).build();
return new EditedMediaItemSequence.Builder(audioItem).setIsLooping(true).build();
}
private void previewComposition() {