agrippa1994

import Foundation
import XCPlayground

XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

extension NSData {
    func castToCPointer<T>() -> T {
        let mem = UnsafeMutablePointer<T>.alloc(sizeof(T.Type))
        self.getBytes(mem, length: sizeof(T.Type))
        return mem.move()

jkosoy

// port of http://stackoverflow.com/a/17948778/3071224

import UIKit
import Foundation

extension CGSize {
    static func aspectFit(aspectRatio : CGSize, var boundingSize: CGSize) -> CGSize {
        let mW = boundingSize.width / aspectRatio.width;
        let mH = boundingSize.height / aspectRatio.height;

ka010

-(void)getPixelBuffer:(CVPixelBufferRef *)pbuf {
    @synchronized (self) {
        
        if(!_pFrame || !_pFrame->data[0])
            return;
        
        NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                                 //                             [NSNumber numberWithBool:YES], kCVPixelBufferCGImageCompatibilityKey,
                                 //                             [NSNumber numberWithBool:YES], kCVPixelBufferCGBitmapContextCompatibilityKey,
                                 @(_pFrame->linesize[0]), kCVPixelBufferBytesPerRowAlignmentKey,