/usr/include/drumstick/alsaqueue.h is in libdrumstick-dev 0.5.0-4+b2.
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MIDI Sequencer C++ library
Copyright (C) 2006-2010, 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, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef DRUMSTICK_ALSAQUEUE_H
#define DRUMSTICK_ALSAQUEUE_H
#include "drumstickcommon.h"
/**
* @file alsaqueue.h
* Classes managing ALSA Sequencer queues
* @defgroup ALSAQueue ALSA Sequencer Queues
* @{
*/
namespace drumstick {
/**
* This is the value for the base skew used in ALSA. It is not possible
* to assign an arbitrary value (ALSA version <= 1.0.20).
*/
#define SKEW_BASE 0x10000
class MidiClient;
class TimerId;
/**
* Queue information container.
*
* This class is used to hold some properties about an ALSA queue object.
*/
class DRUMSTICK_EXPORT QueueInfo
{
friend class MidiQueue;
public:
QueueInfo();
QueueInfo(const QueueInfo& other);
QueueInfo(snd_seq_queue_info_t* other);
virtual ~QueueInfo();
QueueInfo* clone();
QueueInfo& operator=(const QueueInfo& other);
int getInfoSize() const;
int getId();
QString getName();
int getOwner();
bool isLocked();
unsigned int getFlags();
void setName(QString value);
void setOwner(int value);
void setLocked(bool locked);
void setFlags(unsigned int value);
private:
snd_seq_queue_info_t* m_Info;
};
/**
* Queue status container.
*
* This class is used to retrieve some status information from an ALSA queue.
*/
class DRUMSTICK_EXPORT QueueStatus
{
friend class MidiQueue;
public:
QueueStatus();
QueueStatus(const QueueStatus& other);
QueueStatus(snd_seq_queue_status_t* other);
virtual ~QueueStatus();
QueueStatus* clone();
QueueStatus& operator=(const QueueStatus& other);
int getInfoSize() const;
int getId();
int getEvents();
const snd_seq_real_time_t* getRealtime();
unsigned int getStatusBits();
bool isRunning();
double getClockTime();
snd_seq_tick_time_t getTickTime();
private:
snd_seq_queue_status_t* m_Info;
};
/**
* Queue tempo container.
*
* This class is used to hold some tempo properties of an ALSA queue object.
* The queue's resolution defines the meaning of the musical time, in ticks. It
* is expressed in PPQ (parts per quarter), or ticks in a quarter note (crotchet).
* The nominal tempo is usually expressed in BPM (beats per minute), or Maelzel
* metronome units. It can be also given in microseconds per beat. The tempo skew
* factor is given as two integer numbers: skew value and skew base, being the
* factor the quotient of both quantities = value / base. Currently (ALSA <= 1.0.20)
* you can only use the base constant 0x10000 (decimal 65536).
*/
class DRUMSTICK_EXPORT QueueTempo
{
friend class MidiQueue;
public:
QueueTempo();
QueueTempo(const QueueTempo& other);
QueueTempo(snd_seq_queue_tempo_t* other);
virtual ~QueueTempo();
QueueTempo* clone();
QueueTempo& operator=(const QueueTempo& other);
int getInfoSize() const;
int getId();
int getPPQ();
unsigned int getSkewValue();
unsigned int getSkewBase();
unsigned int getTempo();
void setPPQ(int value);
void setSkewValue(unsigned int value);
void setTempo(unsigned int value);
float getNominalBPM();
float getRealBPM();
void setTempoFactor(float value);
void setNominalBPM(float value);
protected:
void setSkewBase(unsigned int value);
private:
snd_seq_queue_tempo_t* m_Info;
};
/**
* Queue timer container.
*
* This class is used to hold some properties about the Timer used with an ALSA
* queue object.
*/
class DRUMSTICK_EXPORT QueueTimer
{
friend class MidiQueue;
public:
QueueTimer();
QueueTimer(const QueueTimer& other);
QueueTimer(snd_seq_queue_timer_t* other);
virtual ~QueueTimer();
QueueTimer* clone();
QueueTimer& operator=(const QueueTimer& other);
int getInfoSize() const;
int getQueueId();
snd_seq_queue_timer_type_t getType();
const snd_timer_id_t* getId();
unsigned int getResolution();
void setType(snd_seq_queue_timer_type_t value);
void setId(snd_timer_id_t* value);
void setId(const TimerId& id);
void setResolution(unsigned int value);
private:
snd_seq_queue_timer_t* m_Info;
};
/**
* Queue management.
*
* This class represents an ALSA sequencer queue object.
*/
class DRUMSTICK_EXPORT MidiQueue : public QObject
{
Q_OBJECT
public:
explicit MidiQueue(MidiClient* seq, QObject* parent = 0);
MidiQueue(MidiClient* seq, const QueueInfo& info, QObject* parent = 0);
MidiQueue(MidiClient* seq, const QString name, QObject* parent = 0);
MidiQueue(MidiClient* seq, const int queue_id, QObject* parent = 0);
virtual ~MidiQueue();
int getId() const { return m_Id; }
void start();
void stop();
void continueRunning();
void clear();
void setTickPosition(snd_seq_tick_time_t pos);
void setRealTimePosition(snd_seq_real_time_t* pos);
QueueInfo& getInfo();
QueueStatus& getStatus();
QueueTempo& getTempo();
QueueTimer& getTimer();
int getUsage();
void setInfo(const QueueInfo& value);
void setTempo(const QueueTempo& value);
void setTimer(const QueueTimer& value);
void setUsage(int used);
private:
bool m_allocated;
int m_Id;
MidiClient* m_MidiClient;
QueueInfo m_Info;
QueueTempo m_Tempo;
QueueTimer m_Timer;
QueueStatus m_Status;
};
} /* namespace drumstick */
/** @} */
#endif //DRUMSTICK_ALSAQUEUE_H
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