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/* -*- Mode: C++; indent-tabs-mode: nil; tab-width: 4 -*-
* -*- coding: utf-8 -*-
*
* Copyright (C) 2023 KylinSoft Co., Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "camera-helper.h"
#include <QFile>
#include <QDir>
extern "C"
{
#include <clib-syslog.h>
}
static const QString usbDevicesPath = QStringLiteral("/sys/bus/usb/devices/");
static const QString configValue = QStringLiteral("/sys/bus/usb/devices/%1/bConfigurationValue");
#define DEVICE_CLASS "/bDeviceClass" // 固定值 0xef 239
#define DEVICE_PROTOCOL "/bDeviceProtocol" // 0x01
#define DEVICE_SUB_CLASS "/bDeviceSubClass" // 0x02
inline int byteToInt(QByteArray data)
{
return QString(data.data()).toInt(nullptr, 16);
}
CameraHelper::CameraHelper(QObject *parent) : QObject(parent)
{
}
QByteArray CameraHelper::getFileData(const QString &filePath)
{
QFile file(filePath);
if (!file.open(QIODevice::ReadOnly)) {
return QByteArray();
}
QByteArray data = file.readAll();
file.close();
return data;
}
void CameraHelper::writeFileData(QString name, QByteArray data)
{
QString path = configValue.arg(name);
QFile file(path.arg(name));
if (!file.open(QIODevice::WriteOnly)) {
SYS_LOG(LOG_WARNING,"write camera bConfigurationValue failed .");
return;
}
file.write(data);
file.flush();
file.close();
}
QStringList CameraHelper::getCameraBusPathName()
{
QStringList busPathList;
QDir dir(usbDevicesPath);
if (!dir.exists()){
return QStringList();
}
dir.setFilter(QDir::Dirs);
dir.setSorting(QDir::Name);
QFileInfoList devicesInfoList = dir.entryInfoList();
for(QFileInfo deviceInfo : devicesInfoList){
if (deviceInfo.fileName() == "." || deviceInfo.fileName() == "..") {
continue;
} else if (deviceInfo.fileName().contains(":")) {
continue;
} else if (deviceInfo.fileName().startsWith("usb")) {
continue;
}
QByteArray deviceClass = getFileData(deviceInfo.absoluteFilePath() + QStringLiteral(DEVICE_CLASS));
SYS_LOG(LOG_DEBUG,"device : %s bDeviceClass is %d",deviceInfo.fileName().toLatin1().data(),byteToInt(deviceClass));
if (byteToInt(deviceClass) != 239) {
continue;
}
QByteArray protocol = getFileData(deviceInfo.absoluteFilePath() + QStringLiteral(DEVICE_PROTOCOL));
if (byteToInt(protocol) != 1) {
continue;
}
QByteArray subClass = getFileData(deviceInfo.absoluteFilePath() + QStringLiteral(DEVICE_SUB_CLASS));
if (byteToInt(subClass) != 2) {
continue;
}
busPathList << deviceInfo.fileName();
}
return busPathList;
}
int CameraHelper::getCameraEnable()
{
QStringList nameList = getCameraBusPathName();
if (nameList.isEmpty()) {
SYS_LOG(LOG_WARNING, "get camera name list failed .");
return -1;
}
QString path = configValue.arg(nameList.at(0));
QByteArray data = getFileData(path);
return QString::fromLatin1(data.data()).toInt();
}
void CameraHelper::enableCamera(bool value)
{
const QStringList nameList = getCameraBusPathName();
if (nameList.isEmpty()) {
SYS_LOG(LOG_WARNING, "get camera name list is failed .");
return;
}
for (const QString& name : nameList) {
writeFileData(name, value ? "1" : "0");
}
}
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