如何将CVImageBuffer转换为Unmanaged <cvimagebuffer>？</cvimagebuffer>

Question

我在Swift中有这个代码并得到一个错误：CVImageBuffer不能转换为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()

我该如何投这个？

谢谢！

Answer 1

CMSampleBufferGetImageBuffer()不会占用一个非托管对象（可能会改变它） 测试版之间）。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)