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authorKieran Bingham <kieran.bingham@ideasonboard.com>2019-06-20 17:11:33 +0100
committerKieran Bingham <kieran.bingham@ideasonboard.com>2019-07-04 22:11:27 +0100
commit843e4466cd78b3369b1e77af0bf3b33cbd09129d (patch)
treed60f82cfaa145773aa2bcdc4f5a318f288d9a529 /src/qcam
parent2976dd6a7e202d161077a454b28e9fcce98945c1 (diff)
qcam: Update window title with FPS
Provide an average FPS in the QCam title bar to show the current rate of frame processing. The QCam compilation is updated to process the Qt MoC headers to support signals and slots accordingly. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/qcam')
-rw-r--r--src/qcam/main_window.cpp23
-rw-r--r--src/qcam/main_window.h14
-rw-r--r--src/qcam/meson.build11
3 files changed, 46 insertions, 2 deletions
diff --git a/src/qcam/main_window.cpp b/src/qcam/main_window.cpp
index d6136910..b2f3a1f3 100644
--- a/src/qcam/main_window.cpp
+++ b/src/qcam/main_window.cpp
@@ -28,6 +28,7 @@ MainWindow::MainWindow(const OptionsParser::Options &options)
title_ = "QCam " + QString::fromStdString(libcamera::version);
setWindowTitle(title_);
+ connect(&titleTimer_, SIGNAL(timeout()), this, SLOT(updateTitle()));
viewfinder_ = new ViewFinder(this);
setCentralWidget(viewfinder_);
@@ -54,6 +55,19 @@ MainWindow::~MainWindow()
CameraManager::instance()->stop();
}
+void MainWindow::updateTitle()
+{
+ unsigned int duration = frameRateInterval_.elapsed();
+ unsigned int frames = framesCaptured_ - previousFrames_;
+ double fps = frames * 1000.0 / duration;
+
+ /* Restart counters. */
+ frameRateInterval_.start();
+ previousFrames_ = framesCaptured_;
+
+ setWindowTitle(title_ + " : " + QString::number(fps, 'f', 2) + " fps");
+}
+
int MainWindow::openCamera()
{
CameraManager *cm = CameraManager::instance();
@@ -148,6 +162,10 @@ int MainWindow::startCapture()
requests.push_back(request);
}
+ titleTimer_.start(2000);
+ frameRateInterval_.start();
+ previousFrames_ = 0;
+ framesCaptured_ = 0;
lastBufferTime_ = 0;
ret = camera_->start();
@@ -188,6 +206,9 @@ void MainWindow::stopCapture()
isCapturing_ = false;
config_.reset();
+
+ titleTimer_.stop();
+ setWindowTitle(title_);
}
void MainWindow::requestComplete(Request *request,
@@ -196,6 +217,8 @@ void MainWindow::requestComplete(Request *request,
if (request->status() == Request::RequestCancelled)
return;
+ framesCaptured_++;
+
Buffer *buffer = buffers.begin()->second;
double fps = buffer->timestamp() - lastBufferTime_;
diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
index 46a494a9..f58cb6a6 100644
--- a/src/qcam/main_window.h
+++ b/src/qcam/main_window.h
@@ -10,7 +10,10 @@
#include <map>
#include <memory>
+#include <QElapsedTimer>
#include <QMainWindow>
+#include <QObject>
+#include <QTimer>
#include <libcamera/camera.h>
#include <libcamera/stream.h>
@@ -28,10 +31,15 @@ enum {
class MainWindow : public QMainWindow
{
+ Q_OBJECT
+
public:
MainWindow(const OptionsParser::Options &options);
~MainWindow();
+private Q_SLOTS:
+ void updateTitle();
+
private:
int openCamera();
@@ -43,6 +51,8 @@ private:
int display(Buffer *buffer);
QString title_;
+ QTimer titleTimer_;
+
const OptionsParser::Options &options_;
std::shared_ptr<Camera> camera_;
@@ -51,6 +61,10 @@ private:
uint64_t lastBufferTime_;
+ QElapsedTimer frameRateInterval_;
+ uint32_t previousFrames_;
+ uint32_t framesCaptured_;
+
ViewFinder *viewfinder_;
};
diff --git a/src/qcam/meson.build b/src/qcam/meson.build
index 9f1fa75f..21f91f25 100644
--- a/src/qcam/meson.build
+++ b/src/qcam/meson.build
@@ -7,14 +7,21 @@ qcam_sources = files([
'viewfinder.cpp',
])
-import('qt5')
+qcam_moc_headers = files([
+ 'main_window.h',
+])
+
+qt5 = import('qt5')
qt5_dep = dependency('qt5',
method : 'pkg-config',
modules : ['Core', 'Gui', 'Widgets'],
required : false)
if qt5_dep.found()
- qcam = executable('qcam', qcam_sources,
+ moc_files = qt5.preprocess(moc_headers: qcam_moc_headers,
+ dependencies: qt5_dep)
+
+ qcam = executable('qcam', qcam_sources, moc_files,
install : true,
dependencies : [libcamera_dep, qt5_dep],
cpp_args : '-DQT_NO_KEYWORDS')