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Re-open stream when MMAP is disabled by madebymozart · Pull Request #2338 · google/oboe · GitHub

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Re-open stream when MMAP is disabled #2338

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Merged
madebymozart merged 2 commits into from
Jan 26, 2026
Conversation 2 Commits 2 Checks 3 Files changed
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Re-open stream when MMAP is disabled #2338

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a2424aa
Re-open stream when MMAP is disabled
madebymozart Jan 26, 2026
b466f0f
Reopen stream if MMAP setting changes via global variable
madebymozart Jan 26, 2026
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5 changes: 4 additions & 1 deletion samples/powerplay/src/main/cpp/PowerPlayMultiPlayer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ void PowerPlayMultiPlayer::setupAudioStream(int32_t channelCount,
bool PowerPlayMultiPlayer::openStream(oboe::PerformanceMode performanceMode) {
__android_log_print(ANDROID_LOG_INFO, TAG, "openStream()");
mLastPerformanceMode = performanceMode;
mLastMMapEnabled = isMMapEnabled();

// Use shared_ptr to prevent use of a deleted callback.
mDataCallback = std::make_shared<MyDataCallback>(this);
Expand Down Expand Up @@ -132,7 +133,9 @@ void PowerPlayMultiPlayer::triggerDown(int32_t index, oboe::PerformanceMode perf
}

// If the performance mode has changed, we need to reopen the stream.
if (performanceMode != mLastPerformanceMode) {
// Also reopen if the user has changed the MMAP policy (enabled/disabled) since the stream was opened.
if (performanceMode != mLastPerformanceMode ||
isMMapEnabled() != mLastMMapEnabled) {
teardownAudioStream();

// Attempt here to reopen the stream with the new performance mode.
Expand Down
2 changes: 2 additions & 0 deletions samples/powerplay/src/main/cpp/PowerPlayMultiPlayer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,8 @@ class PowerPlayMultiPlayer : public iolib::SimpleMultiPlayer {
std::shared_ptr<MyPresentationCallback> mPresentationCallback;

oboe::PerformanceMode mLastPerformanceMode;

bool mLastMMapEnabled;
};

#endif //SAMPLES_POWERPLAYMULTIPLAYER_H
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