如何将CVImageBuffer转换为Unmanaged<CVImageBuffer>？

Question

我在Swift中有以下代码，并得到一个错误: CVImageBuffer不能转换为非托管

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

我该如何投射它呢？

谢谢!

Answer 1

CMSampleBufferGetImageBuffer()不接受非托管对象(现在？-可能在测试版之间发生了变化)。你可以替换

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

只需通过

var imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)