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Retry AudioTrack with smaller buffer if > 1M

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Some phone with limited memory can't allocate bigger
shared memory buffers.
This might or might not be related to Binder's 1M
transaction limit.

Tested on Pixel 4 by setting the minimum buffer size to
1h.

https://github.com/google/ExoPlayer/issues/9712

#minor-release

PiperOrigin-RevId: 425324536
This commit is contained in:
krocard 2022-01-31 11:29:21 +00:00 committed by Andrew Lewis
parent afc3a79e10
commit 40517200fc
1 changed files with 43 additions and 5 deletions
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48
libraries/exoplayer/src/main/java/androidx/media3/exoplayer/audio/DefaultAudioSink.java
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@ -78,6 +78,12 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
@UnstableApi
public final class DefaultAudioSink implements AudioSink {
/**
* If an attempt to instantiate an AudioTrack with a buffer size larger than this value fails, a
* second attempt is made using this buffer size.
*/
private static final int AUDIO_TRACK_SMALLER_BUFFER_RETRY_SIZE = 1_000_000;
/**
* Thrown when the audio track has provided a spurious timestamp, if {@link
* #failOnSpuriousAudioTimestamp} is set.
@ -833,7 +839,7 @@ public final class DefaultAudioSink implements AudioSink {
// initialization of the audio track to fail.
releasingConditionVariable.block();
audioTrack = buildAudioTrack();
audioTrack = buildAudioTrackWithRetry();
if (isOffloadedPlayback(audioTrack)) {
registerStreamEventCallbackV29(audioTrack);
if (offloadMode != OFFLOAD_MODE_ENABLED_GAPLESS_DISABLED) {
@ -1027,12 +1033,31 @@ public final class DefaultAudioSink implements AudioSink {
return false;
}
private AudioTrack buildAudioTrack() throws InitializationException {
private AudioTrack buildAudioTrackWithRetry() throws InitializationException {
try {
return checkNotNull(configuration)
.buildAudioTrack(tunneling, audioAttributes, audioSessionId);
} catch (InitializationException e) {
return buildAudioTrack(checkNotNull(configuration));
} catch (InitializationException initialFailure) {
// Retry with a smaller buffer size.
if (configuration.bufferSize > AUDIO_TRACK_SMALLER_BUFFER_RETRY_SIZE) {
Configuration retryConfiguration =
configuration.copyWithBufferSize(AUDIO_TRACK_SMALLER_BUFFER_RETRY_SIZE);
try {
AudioTrack audioTrack = buildAudioTrack(retryConfiguration);
configuration = retryConfiguration;
return audioTrack;
} catch (InitializationException retryFailure) {
initialFailure.addSuppressed(retryFailure);
}
}
maybeDisableOffload();
throw initialFailure;
}
}
private AudioTrack buildAudioTrack(Configuration configuration) throws InitializationException {
try {
return configuration.buildAudioTrack(tunneling, audioAttributes, audioSessionId);
} catch (InitializationException e) {
if (listener != null) {
listener.onAudioSinkError(e);
}
@ -2138,6 +2163,19 @@ public final class DefaultAudioSink implements AudioSink {
this.availableAudioProcessors = availableAudioProcessors;
}
public Configuration copyWithBufferSize(int bufferSize) {
return new Configuration(
inputFormat,
inputPcmFrameSize,
outputMode,
outputPcmFrameSize,
outputSampleRate,
outputChannelConfig,
outputEncoding,
bufferSize,
availableAudioProcessors);
}
/** Returns if the configurations are sufficiently compatible to reuse the audio track. */
public boolean canReuseAudioTrack(Configuration audioTrackConfiguration) {
return audioTrackConfiguration.outputMode == outputMode