Amlogic: implement CAP_FLAG_AT_END mode

The OSD will use 20Hz for frame capture frequency
The video capture frequency is based on the amlvideodri capture module

src/hyperion-aml/AmlogicWrapper.cpp

@@ -2,15 +2,15 @@
 // Hyperion-AmLogic includes
 #include "AmlogicWrapper.h"
 
-AmlogicWrapper::AmlogicWrapper(const unsigned grabWidth, const unsigned grabHeight, const unsigned updateRate_Hz) :
-	_timer(this),
+// Linux includes
+#include <unistd.h>
+
+AmlogicWrapper::AmlogicWrapper(const unsigned grabWidth, const unsigned grabHeight) :
+	_thread(this),
 	_grabber(grabWidth, grabHeight)
 {
-	_timer.setSingleShot(false);
-	_timer.setInterval(updateRate_Hz);
-
 	// Connect capturing to the timeout signal of the timer
-	connect(&_timer, SIGNAL(timeout()), this, SLOT(capture()));
+	connect(&_thread, SIGNAL (started()), this, SLOT(capture()));
 }
 
 const Image<ColorRgb> & AmlogicWrapper::getScreenshot()
@@ -21,16 +21,20 @@ const Image<ColorRgb> & AmlogicWrapper::getScreenshot()
 
 void AmlogicWrapper::start()
 {
-	_timer.start();
+	_thread.start();
 }
 
 void AmlogicWrapper::stop()
 {
-	_timer.stop();
+	_thread.quit();
 }
 
 void AmlogicWrapper::capture()
 {
-	_grabber.grabFrame(_screenshot);
-	emit sig_screenshot(_screenshot);
+	while (_thread.isRunning())
+	{
+		_grabber.grabFrame(_screenshot);
+		emit sig_screenshot(_screenshot);
+		usleep(1 * 1000);
+	}
 }

src/hyperion-aml/AmlogicWrapper.h

@@ -1,6 +1,6 @@
 
 // QT includes
-#include <QTimer>
+#include <QThread>
 
 // Hyperion-Dispmanx includes
 #include <grabber/AmlogicGrabber.h>
@@ -9,12 +9,12 @@ class AmlogicWrapper : public QObject
 {
 	Q_OBJECT
 public:
-	AmlogicWrapper(const unsigned grabWidth, const unsigned grabHeight, const unsigned updateRate_Hz);
+	AmlogicWrapper(const unsigned grabWidth, const unsigned grabHeight);
 
 	const Image<ColorRgb> & getScreenshot();
 
 	///
-	/// Starts the timed capturing of screenshots
+	/// Starts the threaded capturing of screenshots
 	///
 	void start();
 
@@ -25,18 +25,17 @@ signals:
 
 private slots:
 	///
-	/// Performs a single screenshot capture and publishes the capture screenshot on the screenshot signal.
+	/// Performs screenshot captures and publishes the capture screenshot on the screenshot signal.
 	///
 	void capture();
 
 private:
-	/// The QT timer to generate capture-publish events
-	QTimer _timer;
+	/// The QT thread to generate capture-publish events
+	QThread _thread;
 
 	/// The grabber for creating screenshots
 	AmlogicGrabber   _grabber;
 
 	// image buffers
 	Image<ColorRgb>  _screenshot;
-
 };

src/hyperion-aml/hyperion-aml.cpp

@@ -37,7 +37,6 @@ int main(int argc, char ** argv)
 		// create the option parser and initialize all parser
 		Parser parser("AmLogic capture application for Hyperion. Will automatically search a Hyperion server if -a option isn't used. Please note that if you have more than one server running it's more or less random which one will be used.");
 
-		IntOption     & argFps        = parser.add<IntOption>    ('f', "framerate",  "Capture frame rate [default: %1]", "10", 1, 25);
 		IntOption     & argWidth      = parser.add<IntOption>    (0x0, "width",      "Width of the captured image [default: %1]", "160", 160, 4096);
 		IntOption     & argHeight     = parser.add<IntOption>    (0x0, "height",     "Height of the captured image [default: %1]", "160", 160, 4096);
 		BooleanOption & argScreenshot = parser.add<BooleanOption>(0x0, "screenshot", "Take a single screenshot, save it to file and quit");
@@ -55,7 +54,7 @@ int main(int argc, char ** argv)
 			parser.showHelp(0);
 		}
 
-		AmlogicWrapper amlWrapper(argWidth.getInt(parser), argHeight.getInt(parser), 1000 / argFps.getInt(parser));
+		AmlogicWrapper amlWrapper(argWidth.getInt(parser), argHeight.getInt(parser));
 
 		if (parser.isSet(argScreenshot))
 		{