Moved test/v4l2_to_png to src/hyperion-v4l2; Added json backend temporarily

Former-commit-id: 8c4e0ef7add8016c522d0b4c6f4df8886b905e36

dependencies/build/getoptPlusPlus/getoptpp.cc

@@ -120,7 +120,7 @@ void OptionsParser::usage() const {
    for(i = parameters.parameters.begin();
 		   i != parameters.parameters.end(); i++)
    {
-	   cerr.width(30);
+	   cerr.width(31);
 	   cerr << std::left << "    " + (*i)->usageLine();
 
 	   cerr.width(40);

libsrc/protoserver/CMakeLists.txt

@@ -3,9 +3,6 @@
 set(CURRENT_HEADER_DIR ${CMAKE_SOURCE_DIR}/include/protoserver)
 set(CURRENT_SOURCE_DIR ${CMAKE_SOURCE_DIR}/libsrc/protoserver)
 
-# add protocol buffers
-find_package(Protobuf REQUIRED)
-
 include_directories(
 		${CMAKE_CURRENT_BINARY_DIR}
 		${PROTOBUF_INCLUDE_DIRS})

src/CMakeLists.txt

@@ -1,2 +1,5 @@
 add_subdirectory(hyperiond)
 add_subdirectory(hyperion-remote)
+if (ENABLE_V4L2)
+	add_subdirectory(hyperion-v4l2)
+endif (ENABLE_V4L2)

src/hyperion-v4l2/CMakeLists.txt

@@ -0,0 +1,54 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(hyperion-v4l2)
+
+# add protocol buffers
+find_package(Protobuf REQUIRED)
+
+# find Qt4
+find_package(Qt4 REQUIRED QtCore QtGui QtNetwork)
+
+include_directories(
+	${CMAKE_CURRENT_BINARY_DIR}
+	${PROTOBUF_INCLUDE_DIRS}
+	${QT_INCLUDES}
+)
+
+set(Hyperion_V4L2_HEADERS
+	V4L2Grabber.h
+	ProtoConnection.h
+)
+
+set(Hyperion_V4L2_SOURCES
+	hyperion-v4l2.cpp
+	V4L2Grabber.cpp
+	ProtoConnection.cpp
+)
+
+set(Hyperion_V4L2_PROTOS
+	${CMAKE_CURRENT_SOURCE_DIR}/../../libsrc/protoserver/message.proto
+)
+
+protobuf_generate_cpp(Hyperion_V4L2_PROTO_SRCS Hyperion_V4L2_PROTO_HDRS
+	${Hyperion_V4L2_PROTOS}
+)
+
+add_executable(hyperion-v4l2
+	${Hyperion_V4L2_HEADERS}
+	${Hyperion_V4L2_SOURCES}
+	${Hyperion_V4L2_PROTO_SRCS}
+	${Hyperion_V4L2_PROTO_HDRS}
+)
+
+target_link_libraries(hyperion-v4l2
+	getoptPlusPlus
+	jsoncpp
+	hyperion-utils
+	${PROTOBUF_LIBRARIES}
+	pthread
+)
+
+qt4_use_modules(hyperion-v4l2
+	Core
+	Gui
+	Network)

src/hyperion-v4l2/ProtoConnection.cpp

@@ -0,0 +1,181 @@
+// stl includes
+#include <stdexcept>
+
+// Qt includes
+#include <QRgb>
+
+// hyperion-v4l2 includes
+#include "ProtoConnection.h"
+
+ProtoConnection::ProtoConnection(const std::string & a) :
+	_socket()
+{
+	QString address(a.c_str());
+	QStringList parts = address.split(":");
+	if (parts.size() != 2)
+	{
+		throw std::runtime_error(QString("Wrong address: unable to parse address (%1)").arg(address).toStdString());
+	}
+
+	bool ok;
+	uint16_t port = parts[1].toUShort(&ok);
+	if (!ok)
+	{
+		throw std::runtime_error(QString("Wrong address: Unable to parse the port number (%1)").arg(parts[1]).toStdString());
+	}
+
+	_socket.connectToHost(parts[0], port);
+	if (!_socket.waitForConnected())
+	{
+		throw std::runtime_error("Unable to connect to host");
+	}
+
+	std::cout << "Connected to " << a << std::endl;
+}
+
+ProtoConnection::~ProtoConnection()
+{
+	_socket.close();
+}
+
+void ProtoConnection::setColor(std::vector<QColor> colors, int priority, int duration)
+{
+	// create command
+	Json::Value command;
+	command["command"] = "color";
+	command["priority"] = priority;
+	Json::Value & rgbValue = command["color"];
+	for (const QColor & color : colors)
+	{
+		rgbValue.append(color.red());
+		rgbValue.append(color.green());
+		rgbValue.append(color.blue());
+	}
+	if (duration > 0)
+	{
+		command["duration"] = duration;
+	}
+
+	// send command message
+	Json::Value reply = sendMessage(command);
+
+	// parse reply message
+	parseReply(reply);
+}
+
+void ProtoConnection::setImage(const Image<ColorRgb> &image, int priority, int duration)
+{
+	// ensure the image has RGB888 format
+	QByteArray binaryImage = QByteArray::fromRawData(reinterpret_cast<const char *>(image.memptr()), image.width() * image.height() * 3);
+	const QByteArray base64Image = binaryImage.toBase64();
+
+	// create command
+	Json::Value command;
+	command["command"] = "image";
+	command["priority"] = priority;
+	command["imagewidth"] = image.width();
+	command["imageheight"] = image.height();
+	command["imagedata"] = std::string(base64Image.data(), base64Image.size());
+	if (duration > 0)
+	{
+		command["duration"] = duration;
+	}
+
+	// send command message
+	Json::Value reply = sendMessage(command);
+
+	// parse reply message
+	parseReply(reply);
+}
+
+void ProtoConnection::clear(int priority)
+{
+	std::cout << "Clear priority channel " << priority << std::endl;
+
+	// create command
+	Json::Value command;
+	command["command"] = "clear";
+	command["priority"] = priority;
+
+	// send command message
+	Json::Value reply = sendMessage(command);
+
+	// parse reply message
+	parseReply(reply);
+}
+
+void ProtoConnection::clearAll()
+{
+	std::cout << "Clear all priority channels" << std::endl;
+
+	// create command
+	Json::Value command;
+	command["command"] = "clearall";
+
+	// send command message
+	Json::Value reply = sendMessage(command);
+
+	// parse reply message
+	parseReply(reply);
+}
+
+Json::Value ProtoConnection::sendMessage(const Json::Value & message)
+{
+	// serialize message (FastWriter already appends a newline)
+	std::string serializedMessage = Json::FastWriter().write(message);
+
+	// write message
+	_socket.write(serializedMessage.c_str());
+	if (!_socket.waitForBytesWritten())
+	{
+		throw std::runtime_error("Error while writing data to host");
+	}
+
+	// read reply data
+	QByteArray serializedReply;
+	while (!serializedReply.contains('\n'))
+	{
+		// receive reply
+		if (!_socket.waitForReadyRead())
+		{
+			throw std::runtime_error("Error while reading data from host");
+		}
+
+		serializedReply += _socket.readAll();
+	}
+	int bytes = serializedReply.indexOf('\n') + 1;     // Find the end of message
+
+	// parse reply data
+	Json::Reader jsonReader;
+	Json::Value reply;
+	if (!jsonReader.parse(serializedReply.constData(), serializedReply.constData() + bytes, reply))
+	{
+		throw std::runtime_error("Error while parsing reply: invalid json");
+	}
+
+	return reply;
+}
+
+bool ProtoConnection::parseReply(const Json::Value &reply)
+{
+	bool success = false;
+	std::string reason = "No error info";
+
+	try
+	{
+		success = reply.get("success", false).asBool();
+		if (!success)
+			reason = reply.get("error", reason).asString();
+	}
+	catch (const std::runtime_error &)
+	{
+		// Some json parsing error: ignore and set parsing error
+	}
+
+	if (!success)
+	{
+		throw std::runtime_error("Error: " + reason);
+	}
+
+	return success;
+}

src/hyperion-v4l2/ProtoConnection.h

@@ -0,0 +1,89 @@
+#pragma once
+
+// stl includes
+#include <string>
+
+// Qt includes
+#include <QColor>
+#include <QImage>
+#include <QTcpSocket>
+#include <QMap>
+
+// hyperion util
+#include <utils/Image.h>
+#include <utils/ColorRgb.h>
+
+// jsoncpp includes
+#include <json/json.h>
+
+///
+/// Connection class to setup an connection to the hyperion server and execute commands
+///
+class ProtoConnection
+{
+public:
+	///
+	/// Constructor
+	///
+	/// @param address The address of the Hyperion server (for example "192.168.0.32:19444)
+	///
+	ProtoConnection(const std::string & address);
+
+	///
+	/// Destructor
+	///
+	~ProtoConnection();
+
+	///
+	/// Set all leds to the specified color
+	///
+	/// @param color The color
+	/// @param priority The priority
+	/// @param duration The duration in milliseconds
+	///
+	void setColor(std::vector<QColor> color, int priority, int duration);
+
+	///
+	/// Set the leds according to the given image (assume the image is stretched to the display size)
+	///
+	/// @param image The image
+	/// @param priority The priority
+	/// @param duration The duration in milliseconds
+	///
+	void setImage(const Image<ColorRgb> & image, int priority, int duration);
+
+	///
+	/// Clear the given priority channel
+	///
+	/// @param priority The priority
+	///
+	void clear(int priority);
+
+	///
+	/// Clear all priority channels
+	///
+	void clearAll();
+
+private:
+	///
+	/// Send a json command message and receive its reply
+	///
+	/// @param message The message to send
+	///
+	/// @return The returned reply
+	///
+	Json::Value sendMessage(const Json::Value & message);
+
+	///
+	/// Parse a reply message
+	///
+	/// @param reply The received reply
+	///
+	/// @return true if the reply indicates success
+	///
+	bool parseReply(const Json::Value & reply);
+
+private:
+	/// The TCP-Socket with the connection to the server
+	QTcpSocket _socket;
+};

src/hyperion-v4l2/V4L2Grabber.cpp

@@ -12,9 +12,6 @@
 #include <sys/ioctl.h>
 #include <linux/videodev2.h>
 
-#include <QImage>
-#include <QRgb>
-
 #include "V4L2Grabber.h"
 
 #define CLEAR(x) memset(&(x), 0, sizeof(x))
@@ -37,18 +34,20 @@ static void yuv2rgb(uint8_t y, uint8_t u, uint8_t v, uint8_t & r, uint8_t & g, u
 }
 
 
-V4L2Grabber::V4L2Grabber(const std::string &device, int input, VideoStandard videoStandard, int cropHorizontal, int cropVertical, int frameDecimation, int pixelDecimation) :
+V4L2Grabber::V4L2Grabber(const std::string &device, int input, VideoStandard videoStandard, int width, int height, int cropHorizontal, int cropVertical, int frameDecimation, int pixelDecimation) :
 	_deviceName(device),
 	_ioMethod(IO_METHOD_MMAP),
 	_fileDescriptor(-1),
 	_buffers(),
-	_width(0),
-	_height(0),
+	_width(width),
+	_height(height),
 	_cropWidth(cropHorizontal),
 	_cropHeight(cropVertical),
 	_frameDecimation(std::max(1, frameDecimation)),
 	_pixelDecimation(std::max(1, pixelDecimation)),
-	_currentFrame(0)
+	_currentFrame(0),
+	_callback(nullptr),
+	_callbackArg(nullptr)
 {
 	open_device();
 	init_device(videoStandard, input);
@@ -60,6 +59,12 @@ V4L2Grabber::~V4L2Grabber()
 	close_device();
 }
 
+void V4L2Grabber::setCallback(V4L2Grabber::ImageCallback callback, void *arg)
+{
+	_callback = callback;
+	_callbackArg = arg;
+}
+
 void V4L2Grabber::start()
 {
 	start_capturing();
@@ -343,6 +348,7 @@ void V4L2Grabber::init_device(VideoStandard videoStandard, int input)
 			break;
 		}
 
+
 		// get the current settings
 		struct v4l2_format fmt;
 		CLEAR(fmt);
@@ -358,6 +364,32 @@ void V4L2Grabber::init_device(VideoStandard videoStandard, int input)
 			exit(EXIT_FAILURE);
 		}
 
+		if (_width > 0 || _height > 0)
+		{
+			if (_width > 0)
+			{
+				fmt.fmt.pix.width = _width;
+			}
+
+			if (fmt.fmt.pix.height > 0)
+			{
+				fmt.fmt.pix.height = _height;
+			}
+
+			// set the settings
+			if (-1 == xioctl(VIDIOC_S_FMT, &fmt))
+			{
+				errno_exit("VIDIOC_S_FMT");
+			}
+
+			// get the format settings again
+			// (the size may not have been accepted without an error)
+			if (-1 == xioctl(VIDIOC_G_FMT, &fmt))
+			{
+				errno_exit("VIDIOC_G_FMT");
+			}
+		}
+
 		// store width & height
 		_width = fmt.fmt.pix.width;
 		_height = fmt.fmt.pix.height;
@@ -468,6 +500,8 @@ void V4L2Grabber::stop_capturing()
 
 int V4L2Grabber::read_frame()
 {
+	bool rc = false;
+
 	struct v4l2_buffer buf;
 
 	switch (_ioMethod) {
@@ -490,7 +524,7 @@ int V4L2Grabber::read_frame()
 					}
 			}
 
-			process_image(_buffers[0].start, size);
+			rc = process_image(_buffers[0].start, size);
 			break;
 
 	case IO_METHOD_MMAP:
@@ -518,7 +552,7 @@ int V4L2Grabber::read_frame()
 
 			assert(buf.index < _buffers.size());
 
-			process_image(_buffers[buf.index].start, buf.bytesused);
+			rc = process_image(_buffers[buf.index].start, buf.bytesused);
 
 			if (-1 == xioctl(VIDIOC_QBUF, &buf))
 			{
@@ -558,7 +592,7 @@ int V4L2Grabber::read_frame()
 					}
 			}
 
-			process_image((void *)buf.m.userptr, buf.bytesused);
+			rc = process_image((void *)buf.m.userptr, buf.bytesused);
 
 			if (-1 == xioctl(VIDIOC_QBUF, &buf))
 			{
@@ -567,10 +601,10 @@ int V4L2Grabber::read_frame()
 			break;
 	}
 
-	return 1;
+	return rc ? 1 : 0;
 }
 
-void V4L2Grabber::process_image(const void *p, int size)
+bool V4L2Grabber::process_image(const void *p, int size)
 {
 	if (++_currentFrame >= _frameDecimation)
 	{
@@ -584,14 +618,15 @@ void V4L2Grabber::process_image(const void *p, int size)
 		{
 			process_image(reinterpret_cast<const uint8_t *>(p));
 			_currentFrame = 0; // restart counting
+			return true;
 		}
 	}
+
+	return false;
 }
 
 void V4L2Grabber::process_image(const uint8_t * data)
 {
-	std::cout << "process image" << std::endl;
-
 	int width = (_width - 2 * _cropWidth + _pixelDecimation/2) / _pixelDecimation;
 	int height = (_height - 2 * _cropHeight + _pixelDecimation/2) / _pixelDecimation;
 
@@ -611,9 +646,10 @@ void V4L2Grabber::process_image(const uint8_t * data)
 		}
 	}
 
-	// store as PNG
-	QImage pngImage((const uint8_t *) image.memptr(), width, height, 3*width, QImage::Format_RGB888);
-	pngImage.save("screenshot.png");
+	if (_callback != nullptr)
+	{
+		(*_callback)(_callbackArg, image);
+	}
 }
 
 int V4L2Grabber::xioctl(int request, void *arg)

src/hyperion-v4l2/V4L2Grabber.h

@@ -14,14 +14,18 @@
 class V4L2Grabber
 {
 public:
+	typedef void (*ImageCallback)(void * arg, const Image<ColorRgb> & image);
+
 	enum VideoStandard {
 		PAL, NTSC, NO_CHANGE
 	};
 
 public:
-	V4L2Grabber(const std::string & device, int input, VideoStandard videoStandard, int cropHorizontal, int cropVertical, int frameDecimation, int pixelDecimation);
+	V4L2Grabber(const std::string & device, int input, VideoStandard videoStandard, int width, int height, int cropHorizontal, int cropVertical, int frameDecimation, int pixelDecimation);
 	virtual ~V4L2Grabber();
 
+	void setCallback(ImageCallback callback, void * arg);
+
 	void start();
 
 	void capture(int frameCount = -1);
@@ -49,7 +53,7 @@ private:
 
 	int read_frame();
 
-	void process_image(const void *p, int size);
+	bool process_image(const void *p, int size);
 
 	void process_image(const uint8_t *p);
 
@@ -83,4 +87,7 @@ private:
 	const int _pixelDecimation;
 
 	int _currentFrame;
+
+	ImageCallback _callback;
+	void * _callbackArg;
 };

src/hyperion-v4l2/hyperion-v4l2.cpp

@@ -0,0 +1,143 @@
+
+// STL includes
+#include <csignal>
+#include <iomanip>
+
+// QT includes
+#include <QImage>
+
+// getoptPlusPLus includes
+#include <getoptPlusPlus/getoptpp.h>
+
+#include "V4L2Grabber.h"
+#include "ProtoConnection.h"
+
+using namespace vlofgren;
+
+/// Data parameter for the video standard
+typedef vlofgren::PODParameter<V4L2Grabber::VideoStandard> VideoStandardParameter;
+
+namespace vlofgren {
+	/// Translates a string (as passed on the commandline) to a color standard
+	///
+	/// @param[in] s The string (as passed on the commandline)
+	/// @return The color standard
+	/// @throws Parameter::ParameterRejected If the string did not result in a video standard
+	template<>
+	V4L2Grabber::VideoStandard VideoStandardParameter::validate(const std::string& s) throw (Parameter::ParameterRejected)
+	{
+		QString input = QString::fromStdString(s).toLower();
+
+		if (input == "pal")
+		{
+			return V4L2Grabber::PAL;
+		}
+		else if (input == "ntsc")
+		{
+			return V4L2Grabber::NTSC;
+		}
+		else if (input == "no-change")
+		{
+			return V4L2Grabber::NO_CHANGE;
+		}
+
+		throw Parameter::ParameterRejected("Invalid value for video standard. Valid values are: PAL, NTSC, and NO-CHANGE");
+		return V4L2Grabber::NO_CHANGE;
+	}
+}
+
+// save the image as screenshot
+void saveScreenshot(void *, const Image<ColorRgb> & image)
+{
+	// store as PNG
+	QImage pngImage((const uint8_t *) image.memptr(), image.width(), image.height(), 3*image.width(), QImage::Format_RGB888);
+	pngImage.save("screenshot.png");
+}
+
+// send the image to Hyperion
+void sendImage(void * arg, const Image<ColorRgb> & image)
+{
+	ProtoConnection * connection = static_cast<ProtoConnection *>(arg);
+	connection->setImage(image, 50, 200);
+}
+
+int main(int argc, char** argv)
+{
+	try
+	{
+		// create the option parser and initialize all parameters
+		OptionsParser optionParser("Simple application to send a command to hyperion using the Json interface");
+		ParameterSet & parameters = optionParser.getParameters();
+
+		StringParameter        & argDevice          = parameters.add<StringParameter>       ('d', "device",         "The device to use [default=/dev/video0]");
+		VideoStandardParameter & argVideoStandard   = parameters.add<VideoStandardParameter>('v', "video-standard", "The used video standard. Valid values are PAL. NYSC, or NO-CHANGE [default=PAL]");
+		IntParameter           & argInput           = parameters.add<IntParameter>          (0x0, "input",          "Input channel (optional)");
+		IntParameter           & argWidth           = parameters.add<IntParameter>          (0x0, "width",          "Try to set the width of the video input (optional)");
+		IntParameter           & argHeight          = parameters.add<IntParameter>          (0x0, "height",         "Try to set the height of the video input (optional)");
+		IntParameter           & argCropWidth       = parameters.add<IntParameter>          (0x0, "crop-width",     "Number of pixels to crop from the left and right sides in the picture before decimation [default=0]");
+		IntParameter           & argCropHeight      = parameters.add<IntParameter>          (0x0, "crop-height",    "Number of pixels to crop from the top and the bottom in the picture before decimation [default=0]");
+		IntParameter           & argSizeDecimation  = parameters.add<IntParameter>          ('s', "size-decimator", "Decimation factor for the output size [default=1]");
+		IntParameter           & argFrameDecimation = parameters.add<IntParameter>          ('f', "frame-decimator","Decimation factor for the video frames [default=1]");
+		SwitchParameter<>      & argScreenshot      = parameters.add<SwitchParameter<>>     (0x0, "screenshot",     "Take a single screenshot, save it to file and quit");
+		StringParameter        & argAddress         = parameters.add<StringParameter>       ('a', "address",        "Set the address of the hyperion server [default: 127.0.0.1:19445]");
+		IntParameter           & argPriority        = parameters.add<IntParameter>          ('p', "priority",       "Use the provided priority channel (the lower the number, the higher the priority) [default: 800]");
+		SwitchParameter<>      & argHelp            = parameters.add<SwitchParameter<>>     ('h', "help",           "Show this help message and exit");
+
+		// set defaults
+		argDevice.setDefault("/dev/video0");
+		argVideoStandard.setDefault(V4L2Grabber::PAL);
+		argInput.setDefault(-1);
+		argWidth.setDefault(-1);
+		argHeight.setDefault(-1);
+		argCropWidth.setDefault(0);
+		argCropHeight.setDefault(0);
+		argSizeDecimation.setDefault(1);
+		argFrameDecimation.setDefault(1);
+		argAddress.setDefault("127.0.0.1:19445");
+		argPriority.setDefault(800);
+
+		// parse all options
+		optionParser.parse(argc, const_cast<const char **>(argv));
+
+		// check if we need to display the usage. exit if we do.
+		if (argHelp.isSet())
+		{
+			optionParser.usage();
+			return 0;
+		}
+
+		V4L2Grabber grabber(
+					argDevice.getValue(),
+					argInput.getValue(),
+					argVideoStandard.getValue(),
+					argWidth.getValue(),
+					argHeight.getValue(),
+					std::max(0, argCropWidth.getValue()),
+					std::max(0, argCropHeight.getValue()),
+					std::max(1, argFrameDecimation.getValue()),
+					std::max(1, argSizeDecimation.getValue()));
+
+		grabber.start();
+		if (argScreenshot.isSet())
+		{
+			grabber.setCallback(&saveScreenshot, nullptr);
+			grabber.capture(1);
+		}
+		else
+		{
+			ProtoConnection connection(argAddress.getValue());
+
+			grabber.setCallback(&sendImage, &connection);
+			grabber.capture();
+		}
+		grabber.stop();
+	}
+	catch (const std::runtime_error & e)
+	{
+		// An error occured. Display error and quit
+		std::cerr << e.what() << std::endl;
+		return 1;
+	}
+
+	return 0;
+}

test/CMakeLists.txt

@@ -35,10 +35,6 @@ if (ENABLE_DISPMANX)
 	add_subdirectory(dispmanx2png)
 endif (ENABLE_DISPMANX)
 
-if (ENABLE_V4L2)
-	add_subdirectory(v4l2_to_png)
-endif (ENABLE_V4L2)
-
 add_executable(test_blackborderdetector
 		TestBlackBorderDetector.cpp)
 target_link_libraries(test_blackborderdetector

test/v4l2_to_png/CMakeLists.txt

@@ -1,17 +0,0 @@
-
-# find Qt4
-find_package(Qt4 REQUIRED QtCore QtGui)
-
-include_directories(${QT_INCLUDES})
-
-add_executable(v4l2_to_png
-	v4l2_to_png.cpp
-	V4L2Grabber.h
-	V4L2Grabber.cpp)
-
-target_link_libraries(v4l2_to_png
-	getoptPlusPlus)
-
-qt4_use_modules(v4l2_to_png
-	Core
-	Gui)

test/v4l2_to_png/v4l2_to_png.cpp

@@ -1,104 +0,0 @@
-
-// STL includes
-#include <csignal>
-#include <iomanip>
-
-// QT includes
-#include <QImage>
-
-// getoptPlusPLus includes
-#include <getoptPlusPlus/getoptpp.h>
-
-#include "V4L2Grabber.h"
-
-using namespace vlofgren;
-
-/// Data parameter for the video standard
-typedef vlofgren::PODParameter<V4L2Grabber::VideoStandard> VideoStandardParameter;
-
-namespace vlofgren {
-	/// Translates a string (as passed on the commandline) to a color standard
-	///
-	/// @param[in] s The string (as passed on the commandline)
-	/// @return The color standard
-	/// @throws Parameter::ParameterRejected If the string did not result in a video standard
-	template<>
-	V4L2Grabber::VideoStandard VideoStandardParameter::validate(const std::string& s) throw (Parameter::ParameterRejected)
-	{
-		QString input = QString::fromStdString(s).toLower();
-
-		if (input == "pal")
-		{
-			return V4L2Grabber::PAL;
-		}
-		else if (input == "ntsc")
-		{
-			return V4L2Grabber::NTSC;
-		}
-		else if (input == "no-change")
-		{
-			return V4L2Grabber::NO_CHANGE;
-		}
-
-		throw Parameter::ParameterRejected("Invalid value for video standard. Valid values are: PAL, NTSC, and NO-CHANGE");
-		return V4L2Grabber::NO_CHANGE;
-	}
-}
-
-
-int main(int argc, char** argv)
-{
-	try
-	{
-		// create the option parser and initialize all parameters
-		OptionsParser optionParser("Simple application to send a command to hyperion using the Json interface");
-		ParameterSet & parameters = optionParser.getParameters();
-
-		StringParameter &   argDevice             = parameters.add<StringParameter>       ('d', "device",         "The device to use [default=/dev/video0]");
-		VideoStandardParameter & argVideoStandard = parameters.add<VideoStandardParameter>('v', "video-standard", "The used video standard. Valid values are PAL. NYSC, or NO-CHANGE [default=PAL]");
-		IntParameter &      argInput              = parameters.add<IntParameter>          ('i', "input",          "Input channel [default=0]");
-		IntParameter &      argCropWidth          = parameters.add<IntParameter>          (0x0, "crop-width",     "Number of pixels to crop from the left and right sides in the picture before decimation [default=0]");
-		IntParameter &      argCropHeight         = parameters.add<IntParameter>          (0x0, "crop-height",    "Number of pixels to crop from the top and the bottom in the picture before decimation [default=0]");
-		IntParameter &      argSizeDecimation     = parameters.add<IntParameter>          ('s', "size-decimator", "Decimation factor for the output size [default=1]");
-		SwitchParameter<> & argHelp               = parameters.add<SwitchParameter<> >    ('h', "help",           "Show this help message and exit");
-
-		// set defaults
-		argDevice.setDefault("/dev/video0");
-		argVideoStandard.setDefault(V4L2Grabber::PAL);
-		argInput.setDefault(0);
-		argCropWidth.setDefault(0);
-		argCropHeight.setDefault(0);
-		argSizeDecimation.setDefault(1);
-
-		// parse all options
-		optionParser.parse(argc, const_cast<const char **>(argv));
-
-		// check if we need to display the usage. exit if we do.
-		if (argHelp.isSet())
-		{
-			optionParser.usage();
-			return 0;
-		}
-
-		V4L2Grabber grabber(
-					argDevice.getValue(),
-					argInput.getValue(),
-					argVideoStandard.getValue(),
-					std::max(0, argCropWidth.getValue()),
-					std::max(0, argCropHeight.getValue()),
-					1,
-					argSizeDecimation.getValue());
-
-		grabber.start();
-		grabber.capture(1);
-		grabber.stop();
-	}
-	catch (const std::runtime_error & e)
-	{
-		// An error occured. Display error and quit
-		std::cerr << e.what() << std::endl;
-		return 1;
-	}
-
-	return 0;
-}