如何正确生成由CVPixelBuffer支持的MTLTexture?
我有以下代码,但似乎会导致内存泄漏:
func PixelBufferToMTLTexture(pixelBuffer:CVPixelBuffer) -> MTLTexture
{
var texture:MTLTexture!
let width = CVPixelBufferGetWidth(pixelBuffer)
let height = CVPixelBufferGetHeight(pixelBuffer)
let format:MTLPixelFormat = .BGRA8Unorm
var textureRef : Unmanaged<CVMetalTextureRef>?
let status = CVMetalTextureCacheCreateTextureFromImage(nil,
videoTextureCache!.takeUnretainedValue(),
pixelBuffer,
nil,
format,
width,
height,
0,
&textureRef)
if(status == kCVReturnSuccess)
{
texture = CVMetalTextureGetTexture(textureRef!.takeUnretainedValue())
}
return texture
}