mirror of
https://github.com/f4exb/sdrangel.git
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285 lines
8.5 KiB
C++
285 lines
8.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2016 F4EXB //
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// written by Edouard Griffiths //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <stdlib.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <libgen.h>
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#ifndef __WINDOWS__
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <linux/serial.h>
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#endif
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#include <QDebug>
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#include <QThread>
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#include <QMutexLocker>
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#include "audio/audiooutput.h"
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#include "dvserialengine.h"
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#include "dvserialworker.h"
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DVSerialEngine::DVSerialEngine()
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{
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}
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DVSerialEngine::~DVSerialEngine()
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{
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release();
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}
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#ifdef __WINDOWS__
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void DVSerialEngine::getComList()
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{
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m_comList.clear();
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m_comList8250.clear();
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char comCStr[16];
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// Arbitrarily set the list to the 20 first COM ports
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for (int i = 1; i <= 20; i++)
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{
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sprintf(comCStr, "COM%d", i);
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m_comList.push_back(std::string(comCStr));
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}
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}
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#else
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std::string DVSerialEngine::get_driver(const std::string& tty)
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{
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struct stat st;
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std::string devicedir = tty;
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// Append '/device' to the tty-path
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devicedir += "/device";
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// Stat the devicedir and handle it if it is a symlink
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if (lstat(devicedir.c_str(), &st) == 0 && S_ISLNK(st.st_mode))
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{
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char buffer[1024];
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memset(buffer, 0, sizeof(buffer));
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// Append '/driver' and return basename of the target
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devicedir += "/driver";
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if (readlink(devicedir.c_str(), buffer, sizeof(buffer)) > 0)
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{
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return basename(buffer);
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}
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}
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return "";
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}
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void DVSerialEngine::register_comport(std::list<std::string>& comList,
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std::list<std::string>& comList8250, const std::string& dir)
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{
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// Get the driver the device is using
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std::string driver = get_driver(dir);
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// Skip devices without a driver
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if (driver.size() > 0)
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{
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//std::cerr << "register_comport: dir: "<< dir << " driver: " << driver << std::endl;
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std::string devfile = std::string("/dev/") + basename((char *) dir.c_str());
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// Put serial8250-devices in a seperate list
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if (driver == "serial8250")
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{
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comList8250.push_back(devfile);
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}
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else
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comList.push_back(devfile);
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}
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}
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void DVSerialEngine::probe_serial8250_comports(std::list<std::string>& comList,
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std::list<std::string> comList8250)
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{
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struct serial_struct serinfo;
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std::list<std::string>::iterator it = comList8250.begin();
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// Iterate over all serial8250-devices
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while (it != comList8250.end())
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{
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// Try to open the device
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int fd = open((*it).c_str(), O_RDWR | O_NONBLOCK | O_NOCTTY);
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if (fd >= 0)
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{
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// Get serial_info
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if (ioctl(fd, TIOCGSERIAL, &serinfo) == 0)
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{
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// If device type is no PORT_UNKNOWN we accept the port
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if (serinfo.type != PORT_UNKNOWN)
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comList.push_back(*it);
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}
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close(fd);
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}
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it++;
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}
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}
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void DVSerialEngine::getComList()
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{
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int n;
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struct dirent **namelist;
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m_comList.clear();
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m_comList8250.clear();
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const char* sysdir = "/sys/class/tty/";
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// Scan through /sys/class/tty - it contains all tty-devices in the system
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n = scandir(sysdir, &namelist, NULL, NULL);
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if (n < 0)
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perror("scandir");
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else
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{
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while (n--)
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{
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if (strcmp(namelist[n]->d_name, "..")
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&& strcmp(namelist[n]->d_name, "."))
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{
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// Construct full absolute file path
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std::string devicedir = sysdir;
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devicedir += namelist[n]->d_name;
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// Register the device
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register_comport(m_comList, m_comList8250, devicedir);
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}
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free(namelist[n]);
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}
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free(namelist);
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}
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// Only non-serial8250 has been added to comList without any further testing
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// serial8250-devices must be probe to check for validity
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probe_serial8250_comports(m_comList, m_comList8250);
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}
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#endif // __WINDOWS__
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bool DVSerialEngine::scan()
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{
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getComList();
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std::list<std::string>::iterator it = m_comList.begin();
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while (it != m_comList.end())
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{
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DVSerialWorker *worker = new DVSerialWorker();
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if (worker->open(*it))
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{
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DVSerialController controller;
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controller.worker = worker;
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controller.device = *it;
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controller.thread = new QThread();
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controller.worker->moveToThread(controller.thread);
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connect(controller.thread, SIGNAL(started()), controller.worker, SLOT(process()));
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connect(controller.worker, SIGNAL(finished()), controller.thread, SLOT(quit()));
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connect(controller.worker, SIGNAL(finished()), controller.worker, SLOT(deleteLater()));
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connect(controller.thread, SIGNAL(finished()), controller.thread, SLOT(deleteLater()));
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connect(&controller.worker->m_inputMessageQueue, SIGNAL(messageEnqueued()), controller.worker, SLOT(handleInputMessages()));
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controller.thread->start();
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m_controllers.push_back(controller);
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qDebug() << "DVSerialEngine::scan: found device at: " << it->c_str();
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}
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else
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{
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delete worker;
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}
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it++;
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}
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return m_controllers.size() > 0;
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}
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void DVSerialEngine::release()
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{
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qDebug("DVSerialEngine::release");
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std::vector<DVSerialController>::iterator it = m_controllers.begin();
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while (it != m_controllers.end())
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{
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disconnect(&it->worker->m_inputMessageQueue, SIGNAL(messageEnqueued()), it->worker, SLOT(handleInputMessages()));
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it->worker->stop();
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it->thread->wait(100);
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it->worker->m_inputMessageQueue.clear();
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it->worker->close();
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qDebug() << "DVSerialEngine::release: closed device at: " << it->device.c_str();
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++it;
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}
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m_controllers.clear();
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}
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void DVSerialEngine::getDevicesNames(std::vector<std::string>& deviceNames)
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{
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std::vector<DVSerialController>::iterator it = m_controllers.begin();
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while (it != m_controllers.end())
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{
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deviceNames.push_back(it->device);
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++it;
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}
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}
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void DVSerialEngine::pushMbeFrame(const unsigned char *mbeFrame, int mbeRateIndex, int mbeVolumeIndex, unsigned char channels, AudioFifo *audioFifo)
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{
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std::vector<DVSerialController>::iterator it = m_controllers.begin();
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std::vector<DVSerialController>::iterator itAvail = m_controllers.end();
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bool done = false;
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QMutexLocker locker(&m_mutex);
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while (it != m_controllers.end())
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{
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if (it->worker->hasFifo(audioFifo))
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{
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it->worker->pushMbeFrame(mbeFrame, mbeRateIndex, mbeVolumeIndex, channels, audioFifo);
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done = true;
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}
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else if (it->worker->isAvailable())
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{
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itAvail = it;
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}
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++it;
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}
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if (!done)
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{
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if (itAvail != m_controllers.end())
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{
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int wNum = itAvail - m_controllers.begin();
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qDebug("DVSerialEngine::pushMbeFrame: push %p on empty queue %d", audioFifo, wNum);
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itAvail->worker->pushMbeFrame(mbeFrame, mbeRateIndex, mbeVolumeIndex, channels, audioFifo);
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}
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else
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{
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qDebug("DVSerialEngine::pushMbeFrame: no DV serial device available. MBE frame dropped");
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}
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}
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}
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