public MainWindow()
{
InitializeComponent();
this.WindowStartupLocation = System.Windows.WindowStartupLocation.CenterScreen;
this.KeyDown += new KeyEventHandler(MainWindow_KeyDown);
// Print out all the possible input devices to console. Mostly for debugging.
int waveInDevices = WaveIn.DeviceCount;
for (int waveInDevice = 0; waveInDevice < waveInDevices; waveInDevice++)
{
WaveInCapabilities deviceInfo = WaveIn.GetCapabilities(waveInDevice);
Console.WriteLine("Device {0}: {1}, {2} channels",
waveInDevice, deviceInfo.ProductName, deviceInfo.Channels);
}
// Instantiate a waveIn device and start recording.
waveIn = new WaveIn();
waveIn.BufferMilliseconds = 47 * buffersize / 2048;
waveIn.DeviceNumber = 0;
waveIn.WaveFormat = new WaveFormat(44100, 32, 1);
waveIn.DataAvailable += waveIn_DataAvailable;
try
{
waveIn.StartRecording();
}
catch (NAudio.MmException e)
{
Console.WriteLine(e.ToString() + "\nPlug in a microphone!");
}
history = new List <List <int> >();
inverse_history = new List <List <int> >();
pointHist = new PointCollection();
bin = new int[buffersize * 2];
sampledata = new float[buffersize * 2];
priori = new double[buffersize * 2];
//Initializing all the global variables to base values for 1 speaker configuration.
channelLabel = new int[1];
channelLabel[0] = 1;
velocity = new int[1];
velocity[0] = 0;
prev_displacement = new int[1];
prev_displacement[0] = 0;
instant_displacement = new int[1];
instant_displacement[0] = 0;
towards_displacement = new int[1];
towards_displacement[0] = 1;
displacement = new int[1];
displacement[0] = 0;
for (int i = 0; i < buffersize * 2; i++)
{
bin[i] = i;
sampledata[i] = 0;
priori[i] = 0;
}
// Kalman filter related stuff.
filter = new VDKalman(2);
filter.initialize(1, .1, 1, 0);
// To prevent problems with empty lists, we assume 1 channel to start.
history.Add(new List <int> {
0
});
inverse_history.Add(new List <int> {
0
});
// Load up the classifier model file.
WekaHelper.initialize();
}
public void gestureCompleted()
{
// Minimum number of frames of no motion to be segmented as a gesture
int motion_threshold = 3; //originally 5
// Minimum length of time after a gesture is completed before another gesture can be started.
int ignore_threshold = 10;
// If users are still reseting their hands, ignore all the movements and clear all buffers.
if (ignoreFrames <= ignore_threshold)
{
motion_free = 0;
readyforgesture = false;
colorBox.Background = new SolidColorBrush(Colors.Red);
gesture_started = false;
//Clear the buffers
foreach (List <int> sublist in history)
{
sublist.Clear();
}
foreach (List <int> sublist in inverse_history)
{
sublist.Clear();
}
pointHist.Clear();
}
if (gesture_started && ignoreFrames > ignore_threshold && motion_free > motion_threshold && selectedChannels >= 2)
{
// Use LINQ to remove all the frames at the end that correspond to the motion free periods.
pointHist = new PointCollection(pointHist.Reverse().Skip(motion_threshold).Reverse());
S = new StylusPointCollection(S.Reverse().Skip(motion_threshold).Reverse());
for (int i = 0; i < history.Count; i++)
{
history[i] = new List <int>(history[i].Reverse <int>().Skip(motion_threshold).Reverse <int>());
inverse_history[i] = new List <int>(inverse_history[i].Reverse <int>().Skip(motion_threshold).Reverse <int>());
}
//If we are in detect mode, pass it to WEKA for classification.
if (detectMode.IsChecked.Value && pointHist.Count > 9)
{
//Call function to find features and test with weka machine
if (selectedChannels == 2)
{
float[] speakers = { (float)KF[0].speakerTheta, (float)KF[1].speakerTheta };
//temp stores the string identifier of the gesture
string temp = WekaHelper.Classify(false, pointHist.Count() * waveIn.BufferMilliseconds,
true, new List <float>(speakers), pointHist, S, history, inverse_history);
//switch statement to rename up/down gestures to forward/back when displaying in the application
switch (temp)
{
case "swipe_up":
temp = "swipe_forward";
break;
case "swipe_down":
temp = "swipe_back";
break;
case "tap_up":
temp = "tap_forward";
break;
case "tap_down":
temp = "tap_back";
break;
}
gestureDetected.Text = temp;
//TODO Put interaction with other applications in this switch statement
// Allows for changing between workspaces in windows 10.
if (shellIntegration.IsChecked.Value)
{
switch (temp)
{
case "swipe_forward":
sim.Keyboard.KeyDown(VirtualKeyCode.LWIN);
sim.Keyboard.KeyPress(VirtualKeyCode.TAB);
sim.Keyboard.KeyUp(VirtualKeyCode.LWIN);
break;
case "swipe_back":
break;
case "swipe_left":
if (!chrome)
{
sim.Keyboard.KeyDown(VirtualKeyCode.LWIN);
sim.Keyboard.KeyDown(VirtualKeyCode.LCONTROL);
sim.Keyboard.KeyPress(VirtualKeyCode.LEFT);
sim.Keyboard.KeyUp(VirtualKeyCode.LWIN);
sim.Keyboard.KeyUp(VirtualKeyCode.LCONTROL);
}
else
{
sim.Keyboard.KeyDown(VirtualKeyCode.LCONTROL);
sim.Keyboard.KeyDown(VirtualKeyCode.LSHIFT);
sim.Keyboard.KeyPress(VirtualKeyCode.TAB);
sim.Keyboard.KeyUp(VirtualKeyCode.LSHIFT);
sim.Keyboard.KeyUp(VirtualKeyCode.LCONTROL);
}
break;
case "swipe_right":
if (!chrome)
{
sim.Keyboard.KeyDown(VirtualKeyCode.LWIN);
sim.Keyboard.KeyDown(VirtualKeyCode.LCONTROL);
sim.Keyboard.KeyPress(VirtualKeyCode.RIGHT);
sim.Keyboard.KeyUp(VirtualKeyCode.LWIN);
sim.Keyboard.KeyUp(VirtualKeyCode.LCONTROL);
}
else
{
sim.Keyboard.KeyDown(VirtualKeyCode.LCONTROL);
sim.Keyboard.KeyPress(VirtualKeyCode.TAB);
sim.Keyboard.KeyUp(VirtualKeyCode.LCONTROL);
}
break;
case "tap_forward":
chrome = true;
break;
case "tap_back":
chrome = false;
break;
case "tap_left":
break;
case "tap_right":
break;
}
}
}
ignoreFrames = 0;
}
// Clear the buffers
foreach (List <int> sublist in history)
{
sublist.Clear();
}
foreach (List <int> sublist in inverse_history)
{
sublist.Clear();
}
pointHist.Clear();
// Prepare for next gesture (might need a button press)
readyforgesture = false;
colorBox.Background = new SolidColorBrush(Colors.Red);
gesture_started = false;
motion_free = 0;
}
}
