/// <summary>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources
/// </summary>
private void Dispose()
{
this.clipper?.Dispose();
this.clipper = null;
this.toolbar?.Dispose();
this.toolbar = null;
this.motionSession?.Dispose();
this.motionSession = null;
this.codec?.Dispose();
this.codec = null;
this.captureDevice?.Dispose();
this.captureDevice = null;
this.stream?.Dispose();
this.stream = null;
if (this.handlers != null)
{
foreach (Handler handler in this.handlers)
{
handler.Dispose();
}
}
this.handlers = null;
}
/// <summary>
/// Starts the workflow interactively
/// </summary>
internal async Task StartAsync(HudContainerInfo container)
{
this.currentContainer = container;
Log.Info($"starting {Type} workflow on {container.ContainerType} container");
await AcquireRegionAsync();
if (Region.Size.Width <= Clipper.MinimumWidth || Region.Size.Height <= Clipper.MinimumHeight)
{
Log.Trace("capture dismissed");
Finish();
return;
}
if (this.captureDevice == null || !Equals(this.captureDevice.Size.ToTuple(), Region.Size.ToTuple()))
{
// dispose old video provider if size changed
this.captureDevice?.Dispose();
// video provider will capture frames
Log.Debug("creating capture device");
this.captureDevice = CaptureDeviceFactory.CreateVideoCaptureDevice(
Region.Location.X,
Region.Location.Y,
Region.Size.Width,
Region.Size.Height);
// TODO: create and bind transforms
}
// create destination stream, a MultiStream which will act as some kind of stream multiplexer wrapping multiple
// "sub-streams" onto one
// TODO: add IImmediateHandler's to the MultiStream
this.stream = new MultiStream();
// create codec instance
if (Type == WorkflowType.Still)
{
this.codec = Application.ExtensionManager.CreateObject <StillImageCodec>(Codec.TypeName,
Region.Size.Width,
Region.Size.Height,
this.stream);
}
else if (Type == WorkflowType.Motion)
{
this.codec = Application.ExtensionManager.CreateObject <VideoCodec>(Codec.TypeName,
Region.Size.Width,
Region.Size.Height,
this.stream);
}
// create handlers
this.handlers = Handlers.Select(handlerData => {
Handler handler = Application.ExtensionManager.CreateObject <Handler>(
handlerData.TypeName,
this,
this.codec,
this.stream,
handlerData.Options);
if (handler is IStreamWrapper streamWrapperHandler)
{
// add stream wrapper to the multi-stream
this.stream.Add(streamWrapperHandler.OutputStream);
Log.Trace("added stream wrapper handler: " + handlerData.TypeName);
}
return(handler);
}).ToArray();
if (Type == WorkflowType.Still)
{
// still image -- we do not need our stream to be filesystem-backed, as still images can't really be *that*
// large... I hope
this.stream.Add(new MemoryStream());
Log.Info("capturing screen");
this.captureDevice.AcquireFrame();
VideoFrame frame = this.captureDevice.LockFrame();
Log.Info("encoding capture");
this.codec.Start();
this.codec.Feed(frame);
this.codec.Dispose();
// unlock and release capture
this.captureDevice.UnlockFrame(frame);
this.captureDevice.ReleaseFrame();
Finish();
}
else
{
// motion capture -- stand back and don't underestimate my expertise on googling
// save output to a temporary file
Log.Info("starting recording session");
// create toolbar
this.toolbar = new Toolbar(Application.HudManager.GetContainer());
this.clipper?.AttachToolbar(this.toolbar);
/* bind toolbar events */
// option events
this.toolbar.OnOptionsRequested += delegate(object sender, ToolbarOptionRequestType optionType) {
switch (optionType)
{
case ToolbarOptionRequestType.Generic:
try {
new OptionsWindow().Show();
} catch {
/* already open */
}
break;
default:
throw new NotImplementedException();
}
};
// recording control intents
this.toolbar.OnRecordingIntentReceived += delegate(object sender, ToolbarRecordingControlIntent controlIntent) {
try {
Log.Info($"received recording control intent: {controlIntent}");
this.toolbar.SetPrimaryButtonState(enabled: false);
switch (controlIntent)
{
case ToolbarRecordingControlIntent.Start:
/* start recording */
if (!(this.motionSession?.Disposed ?? true))
{
throw new InvalidOperationException("A previous motion capture session has not been closed");
}
if (!(this.codec is VideoCodec))
{
throw new NotSupportedException("The current codec does not allow multiple frames");
}
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
if (
this.captureDevice is DxgiVideoCaptureDevice
dxgiCaptureDevice && // make sure our capture device is DXGI-enabled
this.codec is IDxgiEnabledVideoCodec dxgiCodec)
{
// make sure our codec is DXGI-compatible
// make sure we have the same D3D device for all sources
Device device = dxgiCaptureDevice.Devices.First();
if (dxgiCaptureDevice.Devices.All(d => d == device))
{
// set device to be bound to the DXGI device manager
// TODO: optimize DxgiVideoProvider so that it only creates one device for each adapter
// TODO: allow ID3DCodec's to operate on multiple DXGI devices
dxgiCodec.BindDevice(device);
Log.Info("bound DXGI device to codec");
}
}
// create motion capture session and change toolbar button intent
this.motionSession = new MotionCaptureSession((VideoCodec)this.codec, this.captureDevice);
this.toolbar.SetPrimaryButtonState(ToolbarRecordingControlIntent.Stop);
break;
case ToolbarRecordingControlIntent.Stop:
this.motionSession.Dispose();
Finish();
break;
default:
throw new NotImplementedException();
}
} finally {
this.toolbar?.SetPrimaryButtonState(enabled: true);
}
};
}
}
