Initial version. Allows listing and measuring

main.cpp

@@ -0,0 +1,113 @@
+#include <QCoreApplication>
+#include <QCommandLineParser>
+#include <QAudioDeviceInfo>
+
+#include <iostream>
+#include <cmath>
+
+#include "Measurer.h"
+
+using namespace std;
+
+void ListDevices()
+{
+	{
+		auto devices = QAudioDeviceInfo::availableDevices(QAudio::Mode::AudioOutput);
+		cout << "Output devices:\n";
+		for (int i = 0; i < devices.count(); i++)
+		{
+			cout << devices[i].deviceName().toStdString() << "\n";
+		}
+	}
+	{
+		auto devices = QAudioDeviceInfo::availableDevices(QAudio::Mode::AudioInput);
+		cout << "Input devices:\n";
+		for (int i = 0; i < devices.count(); i++)
+		{
+			cout << devices[i].deviceName().toStdString() << "\n";
+		}
+	}
+}
+
+QAudioDeviceInfo GetInputDevice(QString name)
+{
+	auto devices = QAudioDeviceInfo::availableDevices(QAudio::Mode::AudioInput);
+	for (int i = 0; i < devices.count(); i++)
+	{
+		if (devices[i].deviceName() == name) return devices[i];
+	}
+	throw (string)("Unable to find device " + name.toStdString());
+}
+
+QAudioDeviceInfo GetOutputDevice(QString name)
+{
+	auto devices = QAudioDeviceInfo::availableDevices(QAudio::Mode::AudioOutput);
+	for (int i = 0; i < devices.count(); i++)
+	{
+		if (devices[i].deviceName() == name) return devices[i];
+	}
+	throw (string)("Unable to find device " + name.toStdString());
+}
+
+void Measure(QString input_device_name, QString output_device_name, float duration)
+{
+	auto input = GetInputDevice(input_device_name);
+	auto output = GetOutputDevice(output_device_name);
+	Measurer left(input, output, MeasureChannel::Left);
+	float left_result = left.Measure(duration);
+	Measurer right(input, output, MeasureChannel::Right);
+	float right_result = right.Measure(duration);
+	float k = 2 * right_result;
+	float v0v = left_result / k;
+	// assume r2 = 10K
+	float r1 = 10000 / v0v - 10000;
+	float t = 1.0 / (log(r1 / 10000) / 4300 + 1 / 298.0) - 273.0;
+	cout.setf(ios::fixed | ios::showpoint);
+	cout.precision(4);
+	cout << t << "\n";
+}
+
+int main(int argc, char *argv[])
+{
+	QCoreApplication a(argc, argv);
+	QCoreApplication::setApplicationName("soundthermo-cpp");
+	QCoreApplication::setApplicationVersion("0.1");
+
+	QCommandLineParser parser;
+	parser.setApplicationDescription("Simple measurement of temperature via sound card");
+	parser.addHelpOption();
+	parser.addVersionOption();
+	parser.addPositionalArgument("command", "Command to execute");
+
+
+	parser.parse(QCoreApplication::arguments());
+
+	const QStringList args = parser.positionalArguments();
+	const QString command = args.isEmpty() ? QString() : args.first();
+	if (command == "list")
+	{
+		parser.clearPositionalArguments();
+		ListDevices();
+	}
+	else if (command == "measure")
+	{
+		QCommandLineOption input_option(QStringList() << "i" << "input", "Name of device to receive input from", "input");
+		QCommandLineOption output_option(QStringList() << "o" << "output", "Name of device to send output to", "output");
+		QCommandLineOption duration_option(QStringList() << "d" << "duration", "How many seconds to record (uses twice this time)", "duration");
+		parser.addOption(input_option);
+		parser.addOption(output_option);
+		parser.addOption(duration_option);
+		parser.process(a);
+		QString input_device_name = parser.value(input_option);
+		QString output_device_name = parser.value(output_option);
+		float duration = parser.value(duration_option).toFloat();
+		Measure(input_device_name, output_device_name, duration);
+		return 0;
+	}
+	else
+	{
+		parser.process(a);
+		parser.showHelp(0);
+	}
+	return a.exec();
+}