如何创建由 CVPixelBuffer 支持的 MTLTexture [英] How to create a MTLTexture backed by a CVPixelBuffer

问题描述

生成由 CVPixelBuffer 支持的 MTLTexture 的正确方法是什么?

What's the correct way to generate a MTLTexture backed by a CVPixelBuffer?

我有以下代码，但它似乎泄漏:

I have the following code, but it seems to leak:

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
}

推荐答案

啊，我错过了:textureRef?.release()

Ah, I was missing: textureRef?.release()

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