private long prepareCaches(boolean repositioned) { long curr = mCacheTimer.currMillisecond; long end = curr + mContext.mDanmakuFactory.MAX_DANMAKU_DURATION * mScreenSize; if (end < mTimer.currMillisecond) { return 0; } long startTime = SystemClock.uptimeMillis(); IDanmakus danmakus = null; int tryCount = 0; boolean hasException = false; do { try { danmakus = danmakuList.subnew(curr, end); } catch (Exception e) { hasException = true; SystemClock.sleep(10); } } while (++tryCount < 3 && danmakus == null && hasException); if (danmakus == null) { mCacheTimer.update(end); return 0; } BaseDanmaku first = danmakus.first(); BaseDanmaku last = danmakus.last(); if (first == null || last == null) { mCacheTimer.update(end); return 0; } long deltaTime = first.time - mTimer.currMillisecond; long sleepTime = 30 + 10 * deltaTime / mContext.mDanmakuFactory.MAX_DANMAKU_DURATION; sleepTime = Math.min(100, sleepTime); if (repositioned) { sleepTime = 0; } IDanmakuIterator itr = danmakus.iterator(); BaseDanmaku item = null; long consumingTime = 0; int orderInScreen = 0; int currScreenIndex = 0; int sizeInScreen = danmakus.size(); // String message = ""; while (!mPause && !mCancelFlag) { boolean hasNext = itr.hasNext(); if (!hasNext) { // message = "break at not hasNext"; break; } item = itr.next(); if (last.time < mTimer.currMillisecond) { // message = "break at last.time < mTimer.currMillisecond"; break; } if (item.hasDrawingCache()) { continue; } if (repositioned == false && (item.isTimeOut() || !item.isOutside())) { continue; } if (!item.hasPassedFilter()) { mContext.mDanmakuFilters.filter( item, orderInScreen, sizeInScreen, null, true, mContext); } // Log.e("prepareCache", currScreenIndex+","+orderInScreen+"," + item.time+"skip:"+skip); if (item.priority == 0 && item.isFiltered()) { continue; } if (item.getType() == BaseDanmaku.TYPE_SCROLL_RL) { // 同屏弹幕密度只对滚动弹幕有效 int screenIndex = (int) ((item.time - curr) / mContext.mDanmakuFactory.MAX_DANMAKU_DURATION); if (currScreenIndex == screenIndex) orderInScreen++; else { orderInScreen = 0; currScreenIndex = screenIndex; } } if (!repositioned) { try { synchronized (mDrawingNotify) { mDrawingNotify.wait(sleepTime); } } catch (InterruptedException e) { e.printStackTrace(); break; } } // build cache if (buildCache(item, false) == RESULT_FAILED) { // message = "break at build failed"; break; } if (!repositioned) { consumingTime = SystemClock.uptimeMillis() - startTime; if (consumingTime >= DanmakuFactory.COMMON_DANMAKU_DURATION * mScreenSize) { // message = "break at consumingTime out:" + consumingTime; break; } } } consumingTime = SystemClock.uptimeMillis() - startTime; if (item != null) { mCacheTimer.update(item.time); // Log.i("cache","stop at :"+item.time+","+count+",size:"+danmakus.size()+","+message); } else { mCacheTimer.update(end); } return consumingTime; }