Merge "AAudio: Use futex for waitForStateChange"
diff --git a/media/libaaudio/src/client/AudioStreamInternal.cpp b/media/libaaudio/src/client/AudioStreamInternal.cpp
index 9f0564f..34ecd25 100644
--- a/media/libaaudio/src/client/AudioStreamInternal.cpp
+++ b/media/libaaudio/src/client/AudioStreamInternal.cpp
@@ -605,13 +605,6 @@
return AAUDIO_ERROR_INVALID_STATE;
}
-aaudio_result_t AudioStreamInternal::updateStateMachine() {
- if (isDataCallbackActive()) {
- return AAUDIO_OK; // state is getting updated by the callback thread read/write call
- }
- return processCommands();
-}
-
void AudioStreamInternal::logTimestamp(AAudioServiceMessage &command) {
static int64_t oldPosition = 0;
static int64_t oldTime = 0;
diff --git a/media/libaaudio/src/client/AudioStreamInternal.h b/media/libaaudio/src/client/AudioStreamInternal.h
index 2367572..4ea61d2 100644
--- a/media/libaaudio/src/client/AudioStreamInternal.h
+++ b/media/libaaudio/src/client/AudioStreamInternal.h
@@ -48,7 +48,7 @@
int64_t *framePosition,
int64_t *timeNanoseconds) override;
- virtual aaudio_result_t updateStateMachine() override;
+ virtual aaudio_result_t processCommands() override;
aaudio_result_t open(const AudioStreamBuilder &builder) override;
@@ -110,8 +110,6 @@
aaudio_result_t drainTimestampsFromService();
- aaudio_result_t processCommands();
-
aaudio_result_t stopCallback_l();
virtual void prepareBuffersForStart() {}
diff --git a/media/libaaudio/src/core/AudioStream.cpp b/media/libaaudio/src/core/AudioStream.cpp
index 06f05b0..8a5186a 100644
--- a/media/libaaudio/src/core/AudioStream.cpp
+++ b/media/libaaudio/src/core/AudioStream.cpp
@@ -21,7 +21,9 @@
#include <atomic>
#include <stdint.h>
+#include <linux/futex.h>
#include <media/MediaMetricsItem.h>
+#include <sys/syscall.h>
#include <aaudio/AAudio.h>
@@ -362,34 +364,37 @@
}
void AudioStream::setState(aaudio_stream_state_t state) {
- ALOGD("%s(s#%d) from %d to %d", __func__, getId(), mState, state);
- if (state == mState) {
+ aaudio_stream_state_t oldState = mState.load();
+ ALOGD("%s(s#%d) from %d to %d", __func__, getId(), oldState, state);
+ if (state == oldState) {
return; // no change
}
// Track transition to DISCONNECTED state.
if (state == AAUDIO_STREAM_STATE_DISCONNECTED) {
android::mediametrics::LogItem(mMetricsId)
.set(AMEDIAMETRICS_PROP_EVENT, AMEDIAMETRICS_PROP_EVENT_VALUE_DISCONNECT)
- .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(getState()))
+ .set(AMEDIAMETRICS_PROP_STATE, AudioGlobal_convertStreamStateToText(oldState))
.record();
}
// CLOSED is a final state
- if (mState == AAUDIO_STREAM_STATE_CLOSED) {
+ if (oldState == AAUDIO_STREAM_STATE_CLOSED) {
ALOGW("%s(%d) tried to set to %d but already CLOSED", __func__, getId(), state);
// Once CLOSING, we can only move to CLOSED state.
- } else if (mState == AAUDIO_STREAM_STATE_CLOSING
+ } else if (oldState == AAUDIO_STREAM_STATE_CLOSING
&& state != AAUDIO_STREAM_STATE_CLOSED) {
ALOGW("%s(%d) tried to set to %d but already CLOSING", __func__, getId(), state);
// Once DISCONNECTED, we can only move to CLOSING or CLOSED state.
- } else if (mState == AAUDIO_STREAM_STATE_DISCONNECTED
+ } else if (oldState == AAUDIO_STREAM_STATE_DISCONNECTED
&& !(state == AAUDIO_STREAM_STATE_CLOSING
|| state == AAUDIO_STREAM_STATE_CLOSED)) {
ALOGW("%s(%d) tried to set to %d but already DISCONNECTED", __func__, getId(), state);
} else {
- mState = state;
+ mState.store(state);
+ // Wake up a wakeForStateChange thread if it exists.
+ syscall(SYS_futex, &mState, FUTEX_WAKE_PRIVATE, INT_MAX, NULL, NULL, 0);
}
}
@@ -408,9 +413,15 @@
if (durationNanos > timeoutNanoseconds) {
durationNanos = timeoutNanoseconds;
}
- AudioClock::sleepForNanos(durationNanos);
- timeoutNanoseconds -= durationNanos;
+ struct timespec time;
+ time.tv_sec = durationNanos / AAUDIO_NANOS_PER_SECOND;
+ // Add the fractional nanoseconds.
+ time.tv_nsec = durationNanos - (time.tv_sec * AAUDIO_NANOS_PER_SECOND);
+ // Sleep for durationNanos. If mState changes from the callback
+ // thread, this thread will wake up earlier.
+ syscall(SYS_futex, &mState, FUTEX_WAIT_PRIVATE, currentState, &time, NULL, 0);
+ timeoutNanoseconds -= durationNanos;
aaudio_result_t result = updateStateMachine();
if (result != AAUDIO_OK) {
return result;
diff --git a/media/libaaudio/src/core/AudioStream.h b/media/libaaudio/src/core/AudioStream.h
index 5fb4528..8dd5538 100644
--- a/media/libaaudio/src/core/AudioStream.h
+++ b/media/libaaudio/src/core/AudioStream.h
@@ -100,10 +100,17 @@
int64_t *timeNanoseconds) = 0;
/**
- * Update state machine.()
- * @return
+ * Update state machine.
+ * @return result of the operation.
*/
- virtual aaudio_result_t updateStateMachine() = 0;
+ aaudio_result_t updateStateMachine() {
+ if (isDataCallbackActive()) {
+ return AAUDIO_OK; // state is getting updated by the callback thread read/write call
+ }
+ return processCommands();
+ };
+
+ virtual aaudio_result_t processCommands() = 0;
// =========== End ABSTRACT methods ===========================
@@ -184,7 +191,7 @@
// ============== Queries ===========================
aaudio_stream_state_t getState() const {
- return mState;
+ return mState.load();
}
virtual int32_t getBufferSize() const {
@@ -674,6 +681,8 @@
const android::sp<MyPlayerBase> mPlayerBase;
+ std::atomic<aaudio_stream_state_t> mState{AAUDIO_STREAM_STATE_UNINITIALIZED};
+
// These do not change after open().
int32_t mSamplesPerFrame = AAUDIO_UNSPECIFIED;
aaudio_channel_mask_t mChannelMask = AAUDIO_UNSPECIFIED;
@@ -682,7 +691,6 @@
aaudio_sharing_mode_t mSharingMode = AAUDIO_SHARING_MODE_SHARED;
bool mSharingModeMatchRequired = false; // must match sharing mode requested
audio_format_t mFormat = AUDIO_FORMAT_DEFAULT;
- aaudio_stream_state_t mState = AAUDIO_STREAM_STATE_UNINITIALIZED;
aaudio_performance_mode_t mPerformanceMode = AAUDIO_PERFORMANCE_MODE_NONE;
int32_t mFramesPerBurst = 0;
int32_t mBufferCapacity = 0;
diff --git a/media/libaaudio/src/legacy/AudioStreamLegacy.cpp b/media/libaaudio/src/legacy/AudioStreamLegacy.cpp
index dd11169..f32ef65 100644
--- a/media/libaaudio/src/legacy/AudioStreamLegacy.cpp
+++ b/media/libaaudio/src/legacy/AudioStreamLegacy.cpp
@@ -127,7 +127,7 @@
mCallbackEnabled.store(false);
}
- if (updateStateMachine() != AAUDIO_OK) {
+ if (processCommands() != AAUDIO_OK) {
forceDisconnect();
mCallbackEnabled.store(false);
}
@@ -192,7 +192,7 @@
mCallbackEnabled.store(false);
}
- if (updateStateMachine() != AAUDIO_OK) {
+ if (processCommands() != AAUDIO_OK) {
forceDisconnect();
mCallbackEnabled.store(false);
}
diff --git a/media/libaaudio/src/legacy/AudioStreamRecord.cpp b/media/libaaudio/src/legacy/AudioStreamRecord.cpp
index 1e39e0f..9a136a7 100644
--- a/media/libaaudio/src/legacy/AudioStreamRecord.cpp
+++ b/media/libaaudio/src/legacy/AudioStreamRecord.cpp
@@ -364,8 +364,7 @@
return checkForDisconnectRequest(false);
}
-aaudio_result_t AudioStreamRecord::updateStateMachine()
-{
+aaudio_result_t AudioStreamRecord::processCommands() {
aaudio_result_t result = AAUDIO_OK;
aaudio_wrapping_frames_t position;
status_t err;
diff --git a/media/libaaudio/src/legacy/AudioStreamRecord.h b/media/libaaudio/src/legacy/AudioStreamRecord.h
index 5ce73f9..252ff3c 100644
--- a/media/libaaudio/src/legacy/AudioStreamRecord.h
+++ b/media/libaaudio/src/legacy/AudioStreamRecord.h
@@ -58,7 +58,7 @@
int64_t getFramesWritten() override;
- aaudio_result_t updateStateMachine() override;
+ aaudio_result_t processCommands() override;
aaudio_direction_t getDirection() const override {
return AAUDIO_DIRECTION_INPUT;
diff --git a/media/libaaudio/src/legacy/AudioStreamTrack.cpp b/media/libaaudio/src/legacy/AudioStreamTrack.cpp
index 6f1dc92..09caa5c 100644
--- a/media/libaaudio/src/legacy/AudioStreamTrack.cpp
+++ b/media/libaaudio/src/legacy/AudioStreamTrack.cpp
@@ -378,8 +378,7 @@
return checkForDisconnectRequest(false);;
}
-aaudio_result_t AudioStreamTrack::updateStateMachine()
-{
+aaudio_result_t AudioStreamTrack::processCommands() {
status_t err;
aaudio_wrapping_frames_t position;
switch (getState()) {
diff --git a/media/libaaudio/src/legacy/AudioStreamTrack.h b/media/libaaudio/src/legacy/AudioStreamTrack.h
index 0f4d72b..1f877b5 100644
--- a/media/libaaudio/src/legacy/AudioStreamTrack.h
+++ b/media/libaaudio/src/legacy/AudioStreamTrack.h
@@ -79,7 +79,7 @@
return AAUDIO_DIRECTION_OUTPUT;
}
- aaudio_result_t updateStateMachine() override;
+ aaudio_result_t processCommands() override;
int64_t incrementClientFrameCounter(int32_t frames) override {
return incrementFramesWritten(frames);