private final long syncTimer(long startMS) {
if (mInSeekingAction || mInSyncAction) {
return 0;
}
mInSyncAction = true;
long d = 0;
long time = startMS - mTimeBase;
if (!mDanmakusVisible || mRenderingState.nothingRendered || mInWaitingState) {
timer.update(time);
mRemainingTime = 0;
} else {
long gapTime = time - timer.currMillisecond;
long averageTime = Math.max(mFrameUpdateRate, getAverageRenderingTime());
if (gapTime > 2000
|| mRenderingState.consumingTime > mCordonTime
|| averageTime > mCordonTime) {
d = gapTime;
gapTime = 0;
} else {
d = averageTime + gapTime / mFrameUpdateRate;
d = Math.max(mFrameUpdateRate, d);
d = Math.min(mCordonTime, d);
long a = d - mLastDeltaTime;
if (a > 3 && a < 8 && mLastDeltaTime >= mFrameUpdateRate && mLastDeltaTime <= mCordonTime) {
d = mLastDeltaTime;
}
gapTime -= d;
mLastDeltaTime = d;
}
mRemainingTime = gapTime;
timer.add(d);
// Log.e("DrawHandler", time+"|d:" + d + "RemaingTime:" + mRemainingTime +
// ",gapTime:" + gapTime + ",rtim:" + mRenderingState.consumingTime + ",average:" +
// averageTime);
}
if (mCallback != null) {
mCallback.updateTimer(timer);
}
mInSyncAction = false;
return d;
}
private void updateInCurrentThread() {
if (quitFlag) {
return;
}
long startMS = SystemClock.uptimeMillis();
long d = syncTimer(startMS);
if (d < 0) {
removeMessages(UPDATE);
sendEmptyMessageDelayed(UPDATE, 60 - d);
return;
}
d = mDanmakuView.drawDanmakus();
removeMessages(UPDATE);
if (d
> mCordonTime2) { // this situation may be cuased by ui-thread waiting of DanmakuView, so we
// sync-timer at once
timer.add(d);
mDrawTimes.clear();
}
if (!mDanmakusVisible) {
waitRendering(INDEFINITE_TIME);
return;
} else if (mRenderingState.nothingRendered && mIdleSleep) {
long dTime = mRenderingState.endTime - timer.currMillisecond;
if (dTime > 500) {
waitRendering(dTime - 10);
return;
}
}
if (d < mFrameUpdateRate) {
sendEmptyMessageDelayed(UPDATE, mFrameUpdateRate - d);
return;
}
sendEmptyMessage(UPDATE);
}