drumstickcommon.h

Go to the documentation of this file.

/*
    MIDI Sequencer C++ library 
    Copyright (C) 2006-2019, Pedro Lopez-Cabanillas <plcl@users.sf.net>
 
    This library 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 library 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/>.
*/
 
#ifndef DRUMSTICK_DRUMSTICKCOMMON_H
#define DRUMSTICK_DRUMSTICKCOMMON_H
 
#include "macros.h"
#include <qglobal.h>
#include <QString>
#include <QCoreApplication>
#include <QtDebug>
 
extern "C" {
#include <alsa/asoundlib.h>
}
 
namespace drumstick {
 
typedef quint8 MidiByte;  
 
class DRUMSTICK_EXPORT SequencerError
{
public:
    SequencerError(QString const& s, int rc) :
        m_location(s), m_errCode(rc) {}
 
    virtual ~SequencerError() {}
 
    const QString qstrError() const 
    {
        return QString(snd_strerror(m_errCode));
    }
 
    int code() const 
    { 
        return m_errCode; 
    }
    
    const QString& location() const 
    { 
        return m_location; 
    }
 
private:
    QString m_location;
    int     m_errCode;
};
 
inline int checkErrorAndThrow(int rc, const char *where)
{
    if (rc < 0) {
        qDebug() << "Error code:" << rc << "(" <<  snd_strerror(rc) << ")";
        qDebug() << "Location:" << where;
        throw SequencerError(QString(where), rc);
    }
    return rc;
}
 
inline int checkWarning(int rc, const char *where)
{
    if (rc < 0) {
        qWarning() << "Exception code:" << rc << "(" <<  snd_strerror(rc) << ")";
        qWarning() << "Location:" << where;
    }
    return rc;
}
 
#define CHECK_ERROR(x)   (checkErrorAndThrow((x),__PRETTY_FUNCTION__))
 
#define CHECK_WARNING(x) (checkWarning((x),__PRETTY_FUNCTION__))
 
const QString LIBRARY_VERSION(SND_LIB_VERSION_STR);
 
} /* namespace drumstick */
 
#endif /*DRUMSTICK_DRUMSTICKCOMMON_H*/