fix animated avif decode failed, os_unfair_lock crash

bowencoder · bowencoder · commit 6559b550fbef · 2023-01-30T16:58:42.000+08:00
diff --git a/SDWebImageAVIFCoder/Classes/SDImageAVIFCoder.m b/SDWebImageAVIFCoder/Classes/SDImageAVIFCoder.m
@@ -348,6 +348,7 @@ - (UIImage *)animatedImageFrameAtIndex:(NSUInteger)index {
     SD_LOCK(_lock);
     avifResult decodeResult = avifDecoderNthImage(_decoder, (uint32_t)index);
     if (decodeResult != AVIF_RESULT_OK) {
+        SD_UNLOCK(_lock);
         return nil;
     }
     CGImageRef imageRef = SDCreateCGImageFromAVIF(_decoder->image);

Original file line number	Diff line number	Diff line change
`@@ -348,6 +348,7 @@ - (UIImage *)animatedImageFrameAtIndex:(NSUInteger)index {`
`348`	`348`	`SD_LOCK(_lock);`
`349`	`349`	`avifResult decodeResult = avifDecoderNthImage(_decoder, (uint32_t)index);`
`350`	`350`	`if (decodeResult != AVIF_RESULT_OK) {`
	`351`	`+ SD_UNLOCK(_lock);`
`351`	`352`	`return nil;`
`352`	`353`	`}`
`353`	`354`	`CGImageRef imageRef = SDCreateCGImageFromAVIF(_decoder->image);`