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Decrease animated decode times when cache enable

This commit is contained in:
zhongwuzw 2018-08-31 17:47:39 +08:00
parent d989549b34
commit 6d85cd9061
1 changed files with 10 additions and 4 deletions
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14
SDWebImage/SDAnimatedImageView.m
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@ -639,7 +639,7 @@ static NSUInteger SDDeviceFreeMemory() {
} else if (currentData.length > previousData.length) {
// If current data is appended by previous data, use `NSDataSearchAnchored`
NSRange range = [currentData rangeOfData:previousData options:NSDataSearchAnchored range:NSMakeRange(0, previousData.length)];
if (range.location == 0 && range.length == previousData.length) {
if (range.location == 0) {
// Contains hole previous data and they start with the same beginning
self.isProgressive = YES;
}
@ -743,13 +743,19 @@ static NSUInteger SDDeviceFreeMemory() {
// Or, most cases, the decode speed is faster than render speed, we fetch next frame
fetchFrameIndex = nextFrameIndex;
}
if (!bufferFull && self.fetchQueue.operationCount == 0) {
UIImage *fetchFrame;
LOCKBLOCK({
fetchFrame = self.frameBuffer[@(fetchFrameIndex)];
});
if (!fetchFrame && !bufferFull && self.fetchQueue.operationCount == 0) {
// Prefetch next frame in background queue
UIImage<SDAnimatedImage> *animatedImage = self.animatedImage;
NSOperation *operation = [NSBlockOperation blockOperationWithBlock:^{
UIImage *fetchFrame = [animatedImage animatedImageFrameAtIndex:fetchFrameIndex];
UIImage *frame = [animatedImage animatedImageFrameAtIndex:fetchFrameIndex];
LOCKBLOCK({
self.frameBuffer[@(fetchFrameIndex)] = fetchFrame;
self.frameBuffer[@(fetchFrameIndex)] = frame;
});
}];
[self.fetchQueue addOperation:operation];