如何在Swift中初始化CVPixelBufferRef

我们曾经如下初始化CVPixelBufferRef.

CVPixelBufferRef pxbuffer = NULL;

但是在Swift中我们不能使用NULL,所以我们尝试了以下但当然XCODE希望我们将它用于初始化以使用它

let pxbuffer: CVPixelBufferRef

但怎么样？

在Obj_C中,我们正在创建这样的缓冲区,但正如我在转换为Swift时尝试解释的那样,我已经在第一行停止了.

CVPixelBufferRef pxbuffer = NULL;

CVPixelBufferCreate(kcfAllocatorDefault,picGenislik,frameHeight,kCVPixelFormatType_32ARGB,(__bridge         CFDictionaryRef) options,&pxbuffer);

使用 CVPixelBufferCreate(_:_:_:_:_:_:)创建对象

添加一些演示代码,希望这对您有所帮助.另请阅读Using Legacy C APIs with Swift

var keyCallBack: CFDictionaryKeyCallBacks
var valueCallBacks: CFDictionaryValueCallBacks

var empty: CFDictionaryRef = CFDictionaryCreate(kcfAllocatorDefault,nil,&keyCallBack,&valueCallBacks)

var attributes = CFDictionaryCreateMutable(kcfAllocatorDefault,1,&valueCallBacks);


var iOSurfacePropertiesKey = kCVPixelBufferIOSurfacePropertiesKey

withUnsafePointer(&iOSurfacePropertiesKey) { unsafePointer in
    CFDictionarySetValue(attributes,unsafePointer,empty)
}

var width = 10
var height = 12
var pixelBuffer: CVPixelBufferRef? = nil
var status: CVReturn = CVPixelBufferCreate(kcfAllocatorDefault,width,height,kCVPixelFormatType_32BGRA,attributes,&pixelBuffer)