source: smplayer/trunk/src/deviceinfo.cpp@ 184

/*  smplayer, GUI front-end for mplayer.
    Copyright (C) 2006-2016 Ricardo Villalba <rvm@users.sourceforge.net>

    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 2 of the License, or
    (at your option) 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, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "deviceinfo.h"
#include "paths.h"
#include <QProcess>
#include <QFile>
#include <QSettings>

#ifdef Q_OS_WIN

DeviceList DeviceInfo::retrieveDevices(DeviceType type) {
        qDebug("DeviceInfo::retrieveDevices: %d", type);

        DeviceList l;

        #ifdef CACHE_DEVICE_INFO
        QString inifile = Paths::configPath() + "/device_info.ini";
        QSettings set(inifile, QSettings::IniFormat);
        QString section_name = "display-devices";
        if (type == Sound) section_name = "dsound-devices";

        // Check if we already have the list stored in the INI file
        l = loadList(&set, section_name);
        if (l.count() > 0) return l;
        #endif

        QRegExp rx_device("^(\\d+): (.*)");

        if (QFile::exists("dxlist.exe")) {
                QProcess p;
                p.setProcessChannelMode( QProcess::MergedChannels );
                QStringList arg;
                if (type == Sound) arg << "-s"; else arg << "-d";
                p.start("dxlist", arg);

                if (p.waitForFinished()) {
                        QByteArray line;
                        while (p.canReadLine()) {
                                line = p.readLine().trimmed();
                                qDebug("DeviceInfo::retrieveDevices: '%s'", line.constData());
                                if ( rx_device.indexIn(line) > -1 ) {
                                        int id = rx_device.cap(1).toInt();
                                        QString desc = rx_device.cap(2);
                                        qDebug("DeviceInfo::retrieveDevices: found device: '%d' '%s'", id, desc.toUtf8().constData());
                                        l.append( DeviceData(id, desc) );
                                }
                        }
                }
        }

        #ifdef CACHE_DEVICE_INFO
        saveList(&set, section_name, l);
        #endif

        return l;
}

DeviceList DeviceInfo::dsoundDevices() { 
        return retrieveDevices(Sound);
}

DeviceList DeviceInfo::displayDevices() {
        return retrieveDevices(Display);
}

#else

DeviceList DeviceInfo::alsaDevices() {
        qDebug("DeviceInfo::alsaDevices");

        DeviceList l;

        #ifdef CACHE_DEVICE_INFO
        QString inifile = Paths::configPath() + "/device_info.ini";
        QSettings set(inifile, QSettings::IniFormat);

        // Check if we already have the list stored in the INI file
        l = loadList(&set, "alsa-devices");
        if (l.count() > 0) return l;
        #endif

        QRegExp rx_device("^card\\s([0-9]+).*\\[(.*)\\],\\sdevice\\s([0-9]+):");

        QProcess p;
        p.setProcessChannelMode( QProcess::MergedChannels );
        p.setEnvironment( QStringList() << "LC_ALL=C" );
        p.start("aplay", QStringList() << "-l");

        if (p.waitForFinished()) {
                QByteArray line;
                while (p.canReadLine()) {
                        line = p.readLine();
                        qDebug("DeviceInfo::alsaDevices: '%s'", line.constData());
                        if ( rx_device.indexIn(line) > -1 ) {
                                QString id = rx_device.cap(1);
                                id.append(".");
                                id.append(rx_device.cap(3));
                                QString desc = rx_device.cap(2);
                                qDebug("DeviceInfo::alsaDevices: found device: '%s' '%s'", id.toUtf8().constData(), desc.toUtf8().constData());
                                l.append( DeviceData(id, desc) );
                        }
                }
        } else {
                qDebug("DeviceInfo::alsaDevices: could not start aplay, error %d", p.error());
        }

        #ifdef CACHE_DEVICE_INFO
        saveList(&set, "alsa-devices", l);
        #endif

        return l;
}

DeviceList DeviceInfo::xvAdaptors() {
        qDebug("DeviceInfo::xvAdaptors");

        DeviceList l;

        #ifdef CACHE_DEVICE_INFO
        QString inifile = Paths::configPath() + "/device_info.ini";
        QSettings set(inifile, QSettings::IniFormat);

        // Check if we already have the list stored in the INI file
        l = loadList(&set, "xv-adaptors");
        if (l.count() > 0) return l;
        #endif

        QRegExp rx_device("^.*Adaptor #([0-9]+): \"(.*)\"");

        QProcess p;
        p.setProcessChannelMode( QProcess::MergedChannels );
        p.setEnvironment( QProcess::systemEnvironment() << "LC_ALL=C" );
        p.start("xvinfo");

        if (p.waitForFinished()) {
                QByteArray line;
                while (p.canReadLine()) {
                        line = p.readLine();
                        qDebug("DeviceInfo::xvAdaptors: '%s'", line.constData());
                        if ( rx_device.indexIn(line) > -1 ) {
                                QString id = rx_device.cap(1);
                                QString desc = rx_device.cap(2);
                                qDebug("DeviceInfo::xvAdaptors: found adaptor: '%s' '%s'", id.toUtf8().constData(), desc.toUtf8().constData());
                                l.append( DeviceData(id, desc) );
                        }
                }
        } else {
                qDebug("DeviceInfo::xvAdaptors: could not start xvinfo, error %d", p.error());
        }

        #ifdef CACHE_DEVICE_INFO
        saveList(&set, "xv-adaptors", l);
        #endif

        return l;
}

#endif

#ifdef CACHE_DEVICE_INFO
void DeviceInfo::saveList(QSettings * set, const QString & section_name, const DeviceList & list) {
        set->beginWriteArray(section_name);
        for (int i = 0; i < list.count(); ++i) {
                set->setArrayIndex(i);
                set->setValue("ID", list.at(i).ID());
                set->setValue("description", list.at(i).desc());
        }
        set->endArray();
}

DeviceList DeviceInfo::loadList(QSettings * set, const QString & section_name) {
        DeviceList l;

        int count = set->beginReadArray(section_name);
        for (int i = 0; i < count; ++i) {
                set->setArrayIndex(i);
                QVariant id = set->value("ID");
                QString desc = set->value("description", "").toString();
                l.append(DeviceData(id, desc));
        }

        set->endArray();

        return l;
}
#endif