Created
May 19, 2016 09:58
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deep copy of a CVImageBuffer
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| extension CVPixelBuffer { | |
| func deepcopy() -> CVPixelBuffer? { | |
| let width = CVPixelBufferGetWidth(self) | |
| let height = CVPixelBufferGetHeight(self) | |
| let format = CVPixelBufferGetPixelFormatType(self) | |
| var pixelBufferCopyOptional:CVPixelBuffer? | |
| CVPixelBufferCreate(nil, width, height, format, nil, &pixelBufferCopyOptional) | |
| if let pixelBufferCopy = pixelBufferCopyOptional { | |
| CVPixelBufferLockBaseAddress(self, kCVPixelBufferLock_ReadOnly) | |
| CVPixelBufferLockBaseAddress(pixelBufferCopy, 0) | |
| let baseAddress = CVPixelBufferGetBaseAddress(self) | |
| let dataSize = CVPixelBufferGetDataSize(self) | |
| print("dataSize: \(dataSize)") | |
| let target = CVPixelBufferGetBaseAddress(pixelBufferCopy) | |
| memcpy(target, baseAddress, dataSize) | |
| CVPixelBufferUnlockBaseAddress(pixelBufferCopy, 0) | |
| CVPixelBufferUnlockBaseAddress(self, kCVPixelBufferLock_ReadOnly) | |
| } | |
| return pixelBufferCopyOptional | |
| } | |
| } |
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This crashes for me on an iPad Pro but works fine on an iPhone X.