How to scale/resize CVPixelBufferRef in objective C, iOS

I am trying to resize an image from a CVPixelBufferRef to 299x299. Ideally is would also crop the image. The original pixelbuffer is 640x320, the goal is to scale/crop to 299x299 without loosing aspect ratio (crop to center).

I found code to resize a UIImage in objective c, but none to resize a CVPixelBufferRef. I have found various very complicated examples of object C many different image types, but none specifically for resizing a CVPixelBufferRef.

What is the easiest/best way to do this, please include the exact code.

... I tried the answer from selton, but this did not work as the resulting type in the scaled buffer is not correct (goes into assert code),

OSType sourcePixelFormat = CVPixelBufferGetPixelFormatType(pixelBuffer);
  int doReverseChannels;
  if (kCVPixelFormatType_32ARGB == sourcePixelFormat) {
    doReverseChannels = 1;
  } else if (kCVPixelFormatType_32BGRA == sourcePixelFormat) {
    doReverseChannels = 0;
  } else {
    assert(false);  // Unknown source format
  }

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