There's a lot of colons here too:

  - (id)outputImageProviderFromBufferWithPixelFormat:(NSString *)format 
                                          pixelsWide:(NSUInteger)width 
                                          pixelsHigh:(NSUInteger)height 
                                         baseAddress:(const void *)baseAddress 
                                         bytesPerRow:(NSUInteger)rowBytes 
                                     releaseCallback:(QCPlugInBufferReleaseCallback)callback 
                                      releaseContext:(void *)context 
                                          colorSpace:(CGColorSpaceRef)colorSpace 
                                    shouldColorMatch:(BOOL)colorMatch;