[Bug 793118] frames are pixelated/blurred on ios

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=793118

--- Comment #1 from Muhammet Ilendemli <mi at tailored-apps.com> ---
A workround for the issue:
Create a subclass of CAEAGLLayer and override the frame attribute to return a
scaled version of your screen' bounds

class CustomLayer: CAEAGLLayer {
    override var frame: CGRect {
        set { }
        get {
            let transform = CGAffineTransform(scaleX:  6, y:  6)
            return UIScreen.main.bounds.applying(transform)
        }
    }
}

6 because:
 i have an iPhone 6, so the screen width is 320. ergo stream gets resized to
320x180
 the video is an 1080p rtsp stream (i think) from eathcam.com
 1920/320 = 6 or 1080/180 = 6

set the contentScaleFactor to 6 aswell, because reasons, and use your subclass
of CAEAGLLayer:

class EAGLView: UIView {
    override class var layerClass: AnyClass {
        return CustomLayer.self
    }

    override init(frame: CGRect) {
        super.init(frame: frame)

        contentScaleFactor = 6
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

any 1080p stream should be clear now.

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