如何将CVPixelBufferGetBaseAddress调用转换为Swift? [英] How to convert CVPixelBufferGetBaseAddress call to Swift?

问题描述

也许我是Swift中第一个这样做的人，但是在Swift中使用&/inout和uint8_t似乎在网络上什么都没有.有人可以翻译一下吗?这种关系是按位的吗?

Maybe I'm the first person doing this in Swift but there seems to be nothing on the net using &/inout together with uint8_t in Swift. Could someone translate this please? Is this relationship bitwise?

Objective-C

Objective-C

uint8_t *buf=(uint8_t *) CVPixelBufferGetBaseAddress(cvimgRef);

迅速尝试

let inout buf:uint8_t = SOMETHING HERE CVPixelBufferGetBaseAddress(cvimgRef)

推荐答案

CVPixelBufferGetBaseAddress()返回UnsafeMutablePointer<Void>， 可以通过

let buf = UnsafeMutablePointer<UInt8>(CVPixelBufferGetBaseAddress(pixelBuffer))

已更新Swift 3(Xcode 8)，已检查Swift 5(Xcode 11):

if let baseAddress = CVPixelBufferGetBaseAddress(pixelBuffer) {
    let buf = baseAddress.assumingMemoryBound(to: UInt8.self)
    // `buf` is `UnsafeMutablePointer<UInt8>`
} else {
    // `baseAddress` is `nil`
}

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