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Verify a thread is alive before sending a message to it.

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PiperOrigin-RevId: 568515736
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samrobinson 2023-09-26 06:05:44 -07:00 committed by Copybara-Service
parent 69ffac28bb
commit 0b62d37425
1 changed files with 10 additions and 0 deletions
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10
libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java
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@ -209,6 +209,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
} }
public void start() { public void start() {
verifyInternalThreadAlive();
internalHandler.sendEmptyMessage(MSG_START); internalHandler.sendEmptyMessage(MSG_START);
} }
@ -216,6 +217,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
if (released) { if (released) {
return PROGRESS_STATE_NOT_STARTED; return PROGRESS_STATE_NOT_STARTED;
} }
verifyInternalThreadAlive();
internalHandler.obtainMessage(MSG_UPDATE_PROGRESS, progressHolder).sendToTarget(); internalHandler.obtainMessage(MSG_UPDATE_PROGRESS, progressHolder).sendToTarget();
// TODO: figure out why calling clock.onThreadBlocked() here makes the tests fail. // TODO: figure out why calling clock.onThreadBlocked() here makes the tests fail.
transformerConditionVariable.blockUninterruptible(); transformerConditionVariable.blockUninterruptible();
@ -227,6 +229,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
if (released) { if (released) {
return; return;
} }
verifyInternalThreadAlive();
internalHandler internalHandler
.obtainMessage(MSG_END, END_REASON_CANCELLED, /* unused */ 0, /* exportException */ null) .obtainMessage(MSG_END, END_REASON_CANCELLED, /* unused */ 0, /* exportException */ null)
.sendToTarget(); .sendToTarget();
@ -239,12 +242,14 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
} }
public void endWithCompletion() { public void endWithCompletion() {
verifyInternalThreadAlive();
internalHandler internalHandler
.obtainMessage(MSG_END, END_REASON_COMPLETED, /* unused */ 0, /* exportException */ null) .obtainMessage(MSG_END, END_REASON_COMPLETED, /* unused */ 0, /* exportException */ null)
.sendToTarget(); .sendToTarget();
} }
public void endWithException(ExportException exportException) { public void endWithException(ExportException exportException) {
verifyInternalThreadAlive();
internalHandler internalHandler
.obtainMessage(MSG_END, END_REASON_ERROR, /* unused */ 0, exportException) .obtainMessage(MSG_END, END_REASON_ERROR, /* unused */ 0, exportException)
.sendToTarget(); .sendToTarget();
@ -252,6 +257,10 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
// Private methods. // Private methods.
private void verifyInternalThreadAlive() {
checkState(internalHandlerThread.isAlive(), "Internal thread is dead.");
}
private boolean handleMessage(Message msg) { private boolean handleMessage(Message msg) {
// Some messages cannot be ignored when resources have been released. End messages must be // Some messages cannot be ignored when resources have been released. End messages must be
// handled to report release timeouts and to unblock the transformer condition variable in case // handled to report release timeouts and to unblock the transformer condition variable in case
@ -540,6 +549,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
// which the AssetLoader are allowed to send data. This way SampleExporter understands all // which the AssetLoader are allowed to send data. This way SampleExporter understands all
// the inputs are registered when AssetLoader sends data. // the inputs are registered when AssetLoader sends data.
if (assetLoaderInputTracker.hasAssociatedAllTracksWithGraphInput(trackType)) { if (assetLoaderInputTracker.hasAssociatedAllTracksWithGraphInput(trackType)) {
verifyInternalThreadAlive();
internalHandler internalHandler
.obtainMessage(MSG_REGISTER_SAMPLE_EXPORTER, sampleExporter) .obtainMessage(MSG_REGISTER_SAMPLE_EXPORTER, sampleExporter)
.sendToTarget(); .sendToTarget();