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Commit d7a6aeea authored by TreeHugger Robot's avatar TreeHugger Robot Committed by Android (Google) Code Review
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Merge "Camera: Avoid over-delaying frames in PreviewFrameSpacer" into tm-qpr-dev

parents 72c96659 4b35b1d1

services/camera/libcameraservice/device3/PreviewFrameSpacer.cpp

+5 −3
Original line number Diff line number Diff line
@@ -69,7 +69,9 @@ bool PreviewFrameSpacer::threadLoop() { 
    }



    // Cache the frame to match readout time interval, for up to kMaxFrameWaitTime

    nsecs_t expectedQueueTime = mLastCameraPresentTime + readoutInterval;

    // Because the code between here and queueBuffer() takes time to execute, make sure the

    // presentationInterval is slightly shorter than readoutInterval.

    nsecs_t expectedQueueTime = mLastCameraPresentTime + readoutInterval - kFrameAdjustThreshold;

    nsecs_t frameWaitTime = std::min(kMaxFrameWaitTime, expectedQueueTime - currentTime);

    if (frameWaitTime > 0 && mPendingBuffers.size() < 2) {

        mBufferCond.waitRelative(mLock, frameWaitTime);
@@ -78,9 +80,9 @@ bool PreviewFrameSpacer::threadLoop() { 
        }

        currentTime = systemTime();

    }

    ALOGV("%s: readoutInterval %" PRId64 ", queueInterval %" PRId64 ", waited for %" PRId64

    ALOGV("%s: readoutInterval %" PRId64 ", waited for %" PRId64

            ", timestamp %" PRId64, __FUNCTION__, readoutInterval,

            currentTime - mLastCameraPresentTime, frameWaitTime, buffer.timestamp);

            mPendingBuffers.size() < 2 ? frameWaitTime : 0, buffer.timestamp);

    mPendingBuffers.pop();

    queueBufferToClientLocked(buffer, currentTime);

    return true;

services/camera/libcameraservice/device3/PreviewFrameSpacer.h

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ class PreviewFrameSpacer : public Thread { 
    static constexpr nsecs_t kWaitDuration = 5000000LL; // 50ms

    static constexpr nsecs_t kFrameIntervalThreshold = 80000000LL; // 80ms

    static constexpr nsecs_t kMaxFrameWaitTime = 10000000LL; // 10ms

    static constexpr nsecs_t kFrameAdjustThreshold = 2000000LL; // 2ms

};



}; //namespace camera3