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Trim Opt: Calculate duration based on sample rate from audio format

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Calculating the encoded audio buffer duration.

PiperOrigin-RevId: 597591689
This commit is contained in:
tofunmi 2024-01-11 10:25:40 -08:00 committed by Copybara-Service
parent a728ec8e67
commit f2be3fd0cb
1 changed files with 10 additions and 6 deletions
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12
libraries/transformer/src/main/java/androidx/media3/transformer/Transformer.java
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@ -19,6 +19,7 @@ package androidx.media3.transformer;
import static androidx.media3.common.util.Assertions.checkArgument;
import static androidx.media3.common.util.Assertions.checkNotNull;
import static androidx.media3.common.util.Assertions.checkState;
import static androidx.media3.extractor.AacUtil.AAC_LC_AUDIO_SAMPLE_COUNT;
import static androidx.media3.transformer.Composition.HDR_MODE_EXPERIMENTAL_FORCE_INTERPRET_HDR_AS_SDR;
import static androidx.media3.transformer.ExportResult.OPTIMIZATION_ABANDONED_KEYFRAME_PLACEMENT_OPTIMAL_FOR_TRIM;
import static androidx.media3.transformer.ExportResult.OPTIMIZATION_ABANDONED_OTHER;
@ -744,9 +745,6 @@ public final class Transformer {
private static final int TRANSFORMER_STATE_COPY_OUTPUT = 4;
private static final int TRANSFORMER_STATE_PROCESS_MEDIA_START = 5;
private static final int TRANSFORMER_STATE_REMUX_REMAINING_MEDIA = 6;
// TODO: b/304476154 - Calculate duration based on sample rate from audio format.
private static final int MAX_ENCODED_AUDIO_BUFFER_DURATION_US = 25_000;
private final Context context;
private final TransformationRequest transformationRequest;
private final ImmutableList<AudioProcessor> audioProcessors;
@ -1336,10 +1334,16 @@ public final class Transformer {
processFullInput();
return;
}
long maxEncodedAudioBufferDurationUs = 0;
if (mp4Info.audioFormat != null && mp4Info.audioFormat.sampleRate != Format.NO_VALUE) {
// Ensure there is an audio sample to mux between the two clip times to prevent
// Transformer from hanging because it received an audio track but no audio samples.
maxEncodedAudioBufferDurationUs =
Util.sampleCountToDurationUs(
AAC_LC_AUDIO_SAMPLE_COUNT, mp4Info.audioFormat.sampleRate);
}
if (mp4Info.firstSyncSampleTimestampUsAfterTimeUs - trimStartTimeUs
< MAX_ENCODED_AUDIO_BUFFER_DURATION_US) {
<= maxEncodedAudioBufferDurationUs) {
Transformer.this.composition =
buildNewCompositionWithClipTimes(
composition,