Camera: Skip AE precapture when possible
Skip AE precapture when AE is already converged for still capture use case. This
could save still capture latency 6-7 frame time for AE already converged case.
Bug: 10712902
Change-Id: Ie5512618b76e5d87c62c57c3d96d2004c604e29e
diff --git a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
index 1a1b27b..4260c3a 100644
--- a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
+++ b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
@@ -379,11 +379,23 @@
sp<Camera2Client> &client) {
ATRACE_CALL();
+ bool isAeConverged = false;
// Get the onFrameAvailable callback when the requestID == mCaptureId
client->registerFrameListener(mCaptureId, mCaptureId + 1,
this);
+
+ {
+ Mutex::Autolock l(mInputMutex);
+ isAeConverged = (mAEState == ANDROID_CONTROL_AE_STATE_CONVERGED);
+ }
+
{
SharedParameters::Lock l(client->getParameters());
+ // Skip AE precapture when it is already converged and not in force flash mode.
+ if (l.mParameters.flashMode != Parameters::FLASH_MODE_ON && isAeConverged) {
+ return STANDARD_CAPTURE;
+ }
+
mTriggerId = l.mParameters.precaptureTriggerCounter++;
}
client->getCameraDevice()->triggerPrecaptureMetering(mTriggerId);