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Image to CVPixelBuffer OBJC
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let myPixelBuffy = [self pixelBufferFromCGImage:[[UIImage imageNamed:@"myImage.png"] CGImage]]; | |
- (CVPixelBufferRef)pixelBufferFromCGImage:(CGImageRef)image | |
{ | |
CGSize frameSize = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image)); | |
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys: | |
[NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey, | |
[NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey, | |
nil]; | |
CVPixelBufferRef pxbuffer = NULL; | |
CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, frameSize.width, | |
frameSize.height, kCVPixelFormatType_32ARGB, (CFDictionaryRef) options, | |
&pxbuffer); | |
NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL); | |
CVPixelBufferLockBaseAddress(pxbuffer, 0); | |
void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer); | |
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB(); | |
CGContextRef context = CGBitmapContextCreate( | |
pxdata, frameSize.width, frameSize.height, | |
8, CVPixelBufferGetBytesPerRow(pxbuffer), | |
rgbColorSpace, | |
(CGBitmapInfo)kCGBitmapByteOrder32Little | | |
kCGImageAlphaPremultipliedFirst); | |
CGContextConcatCTM(context, CGAffineTransformMakeRotation(0)); | |
CGAffineTransform flipVertical = CGAffineTransformMake( 1, 0, 0, -1, 0, CGImageGetHeight(image) ); | |
CGContextConcatCTM(context, flipVertical); | |
CGAffineTransform flipHorizontal = CGAffineTransformMake( -1.0, 0.0, 0.0, 1.0, CGImageGetWidth(image), 0.0 ); | |
CGContextConcatCTM(context, flipHorizontal); | |
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image), | |
CGImageGetHeight(image)), image); | |
CGColorSpaceRelease(rgbColorSpace); | |
CGContextRelease(context); | |
CVPixelBufferUnlockBaseAddress(pxbuffer, 0); | |
return pxbuffer; | |
} |
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Awesome!