public AppModel()
{
SwitchDevice = ObservableProperty.CreateSettable <object>(null, true);
ReverseBitmap = ObservableProperty.CreateSettable <object>(null, true);
VideoBitmap = ObservableProperty.CreateSettable <BitmapFrame>(null);
IsRunning = ObservableProperty.CreateSettable(false);
var oldNewIndexes = SwitchDevice
.Select(_ => new
{
OldValue = SelectedDeviceIndex.Value,
NewValue = (SelectedDeviceIndex.Value + 1) % _devices.Length
})
.ToGetOnly(null);
SelectedDeviceIndex = oldNewIndexes
.Select(_ => _.NewValue)
.ToGetOnly(0);
BitmapScaleX = ReverseBitmap
.Select(_ => - 1 * BitmapScaleX.Value)
.ToGetOnly(-1);
_devices = new FilterInfoCollection(FilterCategory.VideoInputDevice)
.Cast <FilterInfo>()
.Select(f => new VideoCaptureDevice(f.MonikerString))
.Do(d => d.VideoResolution = GetResolution(d.VideoCapabilities))
.ToArray();
if (_devices.Length == 0)
{
return;
}
IsRunning
//.Throttle(TimeSpan.FromMilliseconds(200))
.ObserveOn(Scheduler.Default)
.Subscribe(b =>
{
if (b)
{
StartDevice(SelectedDeviceIndex.Value);
}
else
{
StopDevice(SelectedDeviceIndex.Value);
}
});
oldNewIndexes
.Where(_ => IsRunning.Value)
//.Throttle(TimeSpan.FromMilliseconds(200))
.ObserveOn(Scheduler.Default)
.Subscribe(_ =>
{
StopDevice(_.OldValue);
// 連続してデバイスを操作すると失敗することがあるため、待機します。
Thread.Sleep(200);
StartDevice(_.NewValue);
});
}