Created
February 11, 2018 09:49
-
-
Save ryondev/eeb730dbe380b84e1c5eaa8ca19248ad to your computer and use it in GitHub Desktop.
Using to resize the Image Data which from CMSampleBuffer
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| func resizeImage(with buffer: CMSampleBuffer) { | |
| let pixel = CMSampleBufferGetImageBuffer(buffer) | |
| guard let pixelBuffer = pixel else { return } | |
| CVPixelBufferLockBaseAddress(pixelBuffer, CVPixelBufferLockFlags(rawValue: 0)) | |
| let baseAddress = CVPixelBufferGetBaseAddress(pixelBuffer) | |
| let bytesPerRow = CVPixelBufferGetBytesPerRow(pixelBuffer) | |
| var inputBuffer = vImage_Buffer() | |
| inputBuffer.height = inputHeight | |
| inputBuffer.width = inputWidth | |
| inputBuffer.rowBytes = bytesPerRow | |
| inputBuffer.data = baseAddress | |
| let outImg = UnsafeMutablePointer<u_char>.allocate(capacity: Int(4*inputWidth*inputHeight)) | |
| var outputBuffer: vImage_Buffer = vImage_Buffer.init(data: outImg, height: inputHeight, width: inputWidth, rowBytes: Int(4*inputWidth)) | |
| var err: vImage_Error = vImageScale_ARGB8888(&inputBuffer, &outputBuffer, nil, 0) | |
| guard err != kvImageNoError else { | |
| print("error: \(err)") | |
| return | |
| } | |
| var format = vImage_CGImageFormat.init(bitsPerComponent: 8, | |
| bitsPerPixel: 32, | |
| colorSpace: nil, | |
| bitmapInfo: CGBitmapInfo.init(rawValue: CGImageAlphaInfo.first.rawValue), | |
| version: 0, | |
| decode: nil, | |
| renderingIntent: .defaultIntent) | |
| let destRef = vImageCreateCGImageFromBuffer(&outputBuffer, | |
| &format, | |
| nil, | |
| nil, | |
| vImage_Flags(kvImageNoFlags), | |
| &err) | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment