GPUImage2,在前后相机之间切换

问题描述 投票:0回答:2

如何使用swift(使用按钮切换)在GPUImage2(Switch版本)中旋转或切换前后摄像头。任何帮助将非常感谢。谢谢你提前。

ios gpuimage
2个回答
1
投票

让我们考虑GPUImage2的主要示例:

do {
    camera = try Camera(sessionPreset:AVCaptureSessionPreset640x480)
    filter = SaturationAdjustment()
    camera --> filter --> renderView
    camera.startCapture()
} catch {
    fatalError("Could not initialize rendering pipeline: \(error)")
}

相机开始拍摄后,您可以通过以下方式从后向前切换:

do {

    // Stop the capture of the current camera and remove its targets
    sharedImageProcessingContext.runOperationSynchronously{
        camera.stopCapture()
        camera.removeAllTargets()
    }

    // Build a new Camera object, using the back or front physical camera
    if camera.location == .frontFacing {
        camera = try Camera(sessionPreset:.vga640x480, location:.backFacing)
    } else {
        camear = try Camera(sessionPreset:.vga640x480, location:.frontFacing)
    }

    //Rebuild the pipeline
    camera --> filter --> renderView
    camera.startCapture()

} catch {
    print("Error switching camera : \(error)")
}

侧注#1:默认摄像头使用的是默认摄像头,默认值为Camera.init():

public init(sessionPreset:AVCaptureSession.Preset, 
             cameraDevice:AVCaptureDevice? = nil, 
                 location:PhysicalCameraLocation = .backFacing, 
...

附注2:Camera对象显示location属性。不幸的是,它的didSet访问器仍在“TODO”中:

public var location:PhysicalCameraLocation {
    didSet {
        // TODO: Swap the camera locations, framebuffers as needed
    }
}

1
投票

我找到了答案。

我再次重新加载我的视图控制器,然后通过bool值检查它,并相应地初始化摄像机,即渲染视图。

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