swift - 如何将 CVImageBuffer 转换为 Unmanaged？

Question

我在 Swift 中有这段代码并收到错误:CVImageBuffer 不可转换为 Unmanaged

  func getTextureFromSampleBuffer(sampleBuffer: CMSampleBuffer!) -> GLuint {
    cleanupVideoTextures()
   var unmanagedImageBuffer: Unmanaged<CVImageBuffer> = CMSampleBufferGetImageBuffer(sampleBuffer)  // Here get the error
    var imageBuffer = unmanagedImageBuffer.takeUnretainedValue()
    var opaqueImageBuffer = unmanagedImageBuffer.toOpaque()

我该如何转换这个？

谢谢!

Answer 1

CMSampleBufferGetImageBuffer() 不采用非托管对象(不再是？——也许改变了在 Beta 版本之间)。你可以替换

var unmanagedImageBuffer: Unmanaged<CVImageBuffer> = CMSampleBufferGetImageBuffer(sampleBuffer)  // Here get the error
var imageBuffer = unmanagedImageBuffer.takeUnretainedValue()

简单地通过

var imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)