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Cleaning up reading from a webcam.

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This commit is contained in:
Tadas Baltrusaitis 2018-01-27 07:46:21 +00:00
parent 20276a00b2
commit da458f1ab6
4 changed files with 50 additions and 31 deletions
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28
gui/OpenFaceOffline/MainWindow.xaml.cs
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@ -116,7 +116,7 @@ namespace OpenFaceOffline
public bool RecordPose { get; set; } = true; // Head pose (position and orientation)
public bool RecordAUs { get; set; } = true; // Facial action units
public bool RecordGaze { get; set; } = true; // Eye gaze
public bool RecordTracked { get; set; } = false; // Recording tracked videos or images
public bool RecordTracked { get; set; } = true; // Recording tracked videos or images
// Visualisation options
public bool ShowTrackedVideo { get; set; } = true; // Showing the actual tracking
@ -166,7 +166,7 @@ namespace OpenFaceOffline
ProcessSequence(reader);
// Before continuing to next video make sure the user did not stop the processing
if(!thread_running)
if (!thread_running)
{
break;
}
@ -248,9 +248,15 @@ namespace OpenFaceOffline
processing_fps.AddFrame();
}
// Finalize the recording and flush to disk
recorder.Close();
// Post-process the AU recordings
face_analyser.PostProcessOutputFile(recorder.GetCSVFile());
// Close the open video/webcam
reader.Close();
EndMode();
}
@ -342,6 +348,7 @@ namespace OpenFaceOffline
lastFrameTime = CurrentTime;
processing_fps.AddFrame();
// TODO how to report errors from the reader here? exceptions? logging? Problem for future versions?
}
@ -676,13 +683,12 @@ namespace OpenFaceOffline
using (var fbd = new FolderBrowserDialog())
{
DialogResult result = fbd.ShowDialog();
if (result == System.Windows.Forms.DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
if (result == System.Windows.Forms.DialogResult.OK)
{
to_return = fbd.SelectedPath;
}
else
else if(!string.IsNullOrWhiteSpace(fbd.SelectedPath))
{
// TODO warning message here
string messageBoxText = "Could not open the directory.";
string caption = "Invalid directory";
MessageBoxButton button = MessageBoxButton.OK;
@ -760,9 +766,7 @@ namespace OpenFaceOffline
{
StopTracking();
Dispatcher.Invoke(DispatcherPriority.Render, new TimeSpan(0, 0, 0, 2, 0), (Action)(() =>
{
// If camera selection has already been done, no need to re-populate the list as it is quite slow
if (cam_sec == null)
{
cam_sec = new CameraSelection();
@ -786,11 +790,13 @@ namespace OpenFaceOffline
int width = cam_sec.selected_camera.Item2;
int height = cam_sec.selected_camera.Item3;
// processing_thread = new Thread(() => ProcessingLoop(cam_id, width, height));
// processing_thread.Start();
SequenceReader reader = new SequenceReader(cam_id, width, height);
processing_thread = new Thread(() => ProcessSequence(reader));
processing_thread.Name = "Webcam processing";
processing_thread.Start();
}
}));
}

9
lib/local/CppInerop/SequenceReader.h
View file

@ -98,11 +98,11 @@ namespace UtilitiesOF {
}
// Can provide a webcam id
SequenceReader(int webcam_id)
SequenceReader(int webcam_id, int width, int height)
{
m_sequence_capture = new Utilities::SequenceCapture();
bool success = m_sequence_capture->OpenWebcam(webcam_id);
bool success = m_sequence_capture->OpenWebcam(webcam_id, width, height);
if (!success)
{
@ -184,6 +184,10 @@ namespace UtilitiesOF {
return m_gray_frame;
}
void Close() {
m_sequence_capture->Close();
}
// Finalizer. Definitely called before Garbage Collection,
// but not automatically called on explicit Dispose().
// May be called multiple times.
@ -343,6 +347,7 @@ namespace UtilitiesOF {
std::vector<std::pair<int, int>> common_resolutions;
common_resolutions.push_back(std::pair<int, int>(320, 240));
common_resolutions.push_back(std::pair<int, int>(640, 480));
common_resolutions.push_back(std::pair<int, int>(800, 600));
common_resolutions.push_back(std::pair<int, int>(960, 720));
common_resolutions.push_back(std::pair<int, int>(1280, 720));
common_resolutions.push_back(std::pair<int, int>(1280, 960));

2
lib/local/Utilities/include/SequenceCapture.h
View file

@ -87,6 +87,8 @@ namespace Utilities
bool IsOpened();
void Close();
int frame_width;
int frame_height;

6
lib/local/Utilities/src/SequenceCapture.cpp
View file

@ -256,6 +256,12 @@ bool SequenceCapture::OpenWebcam(int device, int image_width, int image_height,
}
void SequenceCapture::Close()
{
if (capture.isOpened())
capture.release();
}
// Destructor that releases the capture
SequenceCapture::~SequenceCapture()
{