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maAlsaSequencer.h
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maAlsaSequencer.h
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//
// MultiArp - Another step in the Great Midi Adventure!
// Copyright (C) 2017, 2018 Barry Neilsen
//
// 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
// (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, see <http://www.gnu.org/licenses/>.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef ALSASEQUENCER_H
#define ALSASEQUENCER_H
#include "maAlsaSequencerQueue.h"
struct AlsaSequencerQueue;
#include <cstdint>
#include <vector>
#define MAX_QUEUES 10
class AlsaSequencer
{
public:
/** Default constructor */
AlsaSequencer();
/** Default destructor */
~AlsaSequencer();
void SetScheduleTime(uint64_t t); // Use a one off call to set time to be used by all subsequent calls to schedule events.
unsigned int ScheduleTimeSeconds()
{
return m_NextScheduleTime.tv_sec;
}
unsigned int ScheduleTimeNanoSeconds()
{
return m_NextScheduleTime.tv_nsec;
}
bool ScheduleNote(int queueId, unsigned char note, unsigned char vel, unsigned int len);
bool ScheduleEcho(int queueId);
snd_seq_t * Handle()
{
return m_SeqHandle;
}
bool EventInputPending()
{
return snd_seq_event_input_pending(m_SeqHandle, 0) > 0;
}
void EventInput(snd_seq_event_t **ev)
{
snd_seq_event_input(m_SeqHandle, ev);
}
int CreateQueue();
AlsaSequencerQueue & Queue(int queueIndex)
{
return m_QueueList.at(queueIndex);
}
int GetFileDescriptorCount()
{
return snd_seq_poll_descriptors_count(m_SeqHandle, POLLIN);
}
bool GetFileDescriptors(struct pollfd * pfd, int npfd)
{
snd_seq_poll_descriptors(m_SeqHandle, pfd, npfd, POLLIN);
return true; // TODO: How to check for success. (Or should we just be throwing exceptions?)
}
unsigned char MidiChannel()
{
return m_MidiChannel;
}
void SetMidiChannel( unsigned char c )
{
m_MidiChannel = c;
}
void SetClientName(const char * name)
{
snd_seq_set_client_name(m_SeqHandle, name);
}
protected:
snd_seq_t *m_SeqHandle;
std::vector<AlsaSequencerQueue> m_QueueList;
snd_seq_real_time_t m_NextScheduleTime;
unsigned char m_MidiChannel;
int m_PortInId;
int m_PortOutId;
private:
};
#endif // ALSASEQUENCER_H