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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QAudioDevice>
#include <QAudioFormat>
#include <QCameraDevice>
#include <QCoreApplication>
#include <QMediaDevices>
#include <QString>
#include <QTextStream>
#include <stdio.h>
static QString formatToString(QAudioFormat::SampleFormat sampleFormat)
{
switch (sampleFormat) {
case QAudioFormat::UInt8:
return "UInt8";
case QAudioFormat::Int16:
return "Int16";
case QAudioFormat::Int32:
return "Int32";
case QAudioFormat::Float:
return "Float";
default:
return "Unknown";
}
}
static QString positionToString(QCameraDevice::Position position)
{
switch (position) {
case QCameraDevice::BackFace:
return "BackFace";
case QCameraDevice::FrontFace:
return "FrontFace";
default:
return "Unspecified";
}
}
static void printAudioDeviceInfo(QTextStream &out, const QAudioDevice &deviceInfo)
{
const auto isDefault = deviceInfo.isDefault() ? "Yes" : "No";
const auto preferredFormat = deviceInfo.preferredFormat();
const auto supportedFormats = deviceInfo.supportedSampleFormats();
out.setFieldWidth(30);
out.setFieldAlignment(QTextStream::AlignLeft);
out << "Name: " << deviceInfo.description() << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Id: " << QString::fromLatin1(deviceInfo.id()) << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Default: " << isDefault << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Preferred Format: " << formatToString(preferredFormat.sampleFormat())
<< qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Preferred Rate: " << preferredFormat.sampleRate() << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Preferred Channels: " << preferredFormat.channelCount() << qSetFieldWidth(0)
<< Qt::endl;
out.setFieldWidth(30);
out << "Supported Formats: ";
for (auto &format : supportedFormats)
out << qSetFieldWidth(0) << formatToString(format) << " ";
out << Qt::endl;
out.setFieldWidth(30);
out << "Supported Rates: " << qSetFieldWidth(0) << deviceInfo.minimumSampleRate() << " - "
<< deviceInfo.maximumSampleRate() << Qt::endl;
out.setFieldWidth(30);
out << "Supported Channels: " << qSetFieldWidth(0) << deviceInfo.minimumChannelCount() << " - "
<< deviceInfo.maximumChannelCount() << Qt::endl;
out << Qt::endl;
}
static void printVideoDeviceInfo(QTextStream &out, const QCameraDevice &cameraDevice)
{
const auto isDefault = cameraDevice.isDefault() ? "Yes" : "No";
const auto position = cameraDevice.position();
const auto photoResolutions = cameraDevice.photoResolutions();
const auto videoFormats = cameraDevice.videoFormats();
out.setFieldWidth(30);
out.setFieldAlignment(QTextStream::AlignLeft);
out << "Name: " << cameraDevice.description() << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Id: " << QString::fromLatin1(cameraDevice.id()) << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Default: " << isDefault << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Position: " << positionToString(position) << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Photo Resolutions: ";
for (auto &resolution : photoResolutions) {
QString s = QStringLiteral("%1x%2").arg(resolution.width()).arg(resolution.height());
out << qSetFieldWidth(0) << s << ", ";
}
out.setFieldWidth(10);
out << Qt::endl << Qt::endl;
out << "Supported Video Formats: " << qSetFieldWidth(0) << Qt::endl;
for (auto &format : videoFormats) {
out.setFieldWidth(30);
QString s =
QStringLiteral("%1x%2").arg(format.resolution().width()).arg(format.resolution().height());
out << "Resolution: " << s << qSetFieldWidth(0) << Qt::endl;
out.setFieldWidth(30);
out << "Frame Rate: " << qSetFieldWidth(0) << "Min:" << format.minFrameRate()
<< " Max:" << format.maxFrameRate() << Qt::endl;
out.setFieldWidth(30);
out << "Format: " << qSetFieldWidth(0)
<< QVideoFrameFormat::pixelFormatToString(format.pixelFormat()) << Qt::endl;
out << Qt::endl;
}
out << Qt::endl;
}
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv); // QtMultimedia needs an application singleton
QTextStream out(stdout);
const auto audioInputDevices = QMediaDevices::audioInputs();
const auto audioOutputDevices = QMediaDevices::audioOutputs();
const auto videoInputDevices = QMediaDevices::videoInputs();
out << "Audio devices detected: " << Qt::endl;
out << Qt::endl << "Input" << Qt::endl;
for (auto &deviceInfo : audioInputDevices)
printAudioDeviceInfo(out, deviceInfo);
out << Qt::endl << "Output" << Qt::endl;
for (auto &deviceInfo : audioOutputDevices)
printAudioDeviceInfo(out, deviceInfo);
out << Qt::endl << "Video devices detected: " << Qt::endl;
for (auto &cameraDevice : videoInputDevices)
printVideoDeviceInfo(out, cameraDevice);
}
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