internal void UpdateVideoGravity(AVLayerVideoGravity gravity)
{
if (_videoLayer != null)
{
_videoLayer.VideoGravity = gravity;
}
}
static internal NSString EnumToKey (AVLayerVideoGravity vg)
{
switch (vg) {
case AVLayerVideoGravity.ResizeAspect:
return AVPlayerLayer.GravityResizeAspect;
case AVLayerVideoGravity.ResizeAspectFill:
return AVPlayerLayer.GravityResizeAspectFill;
case AVLayerVideoGravity.Resize:
return AVPlayerLayer.GravityResize;
default:
return null;
}
}
static internal NSString EnumToKey(AVLayerVideoGravity vg)
{
switch (vg)
{
case AVLayerVideoGravity.ResizeAspect:
return(AVPlayerLayer.GravityResizeAspect);
case AVLayerVideoGravity.ResizeAspectFill:
return(AVPlayerLayer.GravityResizeAspectFill);
case AVLayerVideoGravity.Resize:
return(AVPlayerLayer.GravityResize);
default:
return(null);
}
}
private CGRect VideoPreviewBoxForGravity(AVLayerVideoGravity gravity, CGSize frameSize, CGSize apertureSize)
{
var apertureRatio = apertureSize.Height / apertureSize.Width;
var viewRatio = frameSize.Width / frameSize.Height;
CGSize size = CGSize.Empty;
if (gravity == AVLayerVideoGravity.ResizeAspectFill)
{
if (viewRatio > apertureRatio)
{
size.Width = frameSize.Width;
size.Height = apertureSize.Width * (frameSize.Width / apertureSize.Height);
}
else
{
size.Width = apertureSize.Height * (frameSize.Height / apertureSize.Width);
size.Height = frameSize.Height;
}
}
else if (gravity == AVLayerVideoGravity.ResizeAspect)
{
if (viewRatio > apertureRatio)
{
size.Width = apertureSize.Height * (frameSize.Height / apertureSize.Width);
size.Height = frameSize.Height;
}
else
{
size.Width = frameSize.Width;
size.Height = apertureSize.Width * (frameSize.Width / apertureSize.Height);
}
}
else if (gravity == AVLayerVideoGravity.Resize)
{
size.Width = frameSize.Width;
size.Height = frameSize.Height;
}
CGRect videoBox = CGRect.Empty;
videoBox.Size = size;
if (size.Width < frameSize.Width)
{
videoBox.X = (frameSize.Width - size.Width) / 2;
}
else
{
videoBox.X = (size.Width - frameSize.Width) / 2;
}
if (size.Height < frameSize.Height)
{
videoBox.Y = (frameSize.Height - size.Height) / 2;
}
else
{
videoBox.Y = (size.Height - frameSize.Height) / 2;
}
return(videoBox);
}