105 lines
2.3 KiB
C++
105 lines
2.3 KiB
C++
/*
|
|
* Copyright (C) 2014 Robin Gareus <robin@gareus.org>
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef __libbackend_alsa_midi_h__
|
|
#define __libbackend_alsa_midi_h__
|
|
|
|
#include <stdint.h>
|
|
#include <poll.h>
|
|
#include <pthread.h>
|
|
|
|
#include "pbd/ringbuffer.h"
|
|
#include "ardour/types.h"
|
|
|
|
/* max bytes per individual midi-event
|
|
* events larger than this are ignored */
|
|
#define MaxAlsaMidiEventSize (256)
|
|
|
|
namespace ARDOUR {
|
|
|
|
class AlsaMidiIO {
|
|
public:
|
|
AlsaMidiIO ();
|
|
virtual ~AlsaMidiIO ();
|
|
|
|
int state (void) const { return _state; }
|
|
int start ();
|
|
int stop ();
|
|
|
|
void setup_timing (const size_t samples_per_period, const float samplerate);
|
|
void sync_time(uint64_t);
|
|
|
|
virtual void* main_process_thread () = 0;
|
|
|
|
const std::string & name () const { return _name; }
|
|
|
|
protected:
|
|
pthread_t _main_thread;
|
|
pthread_mutex_t _notify_mutex;
|
|
pthread_cond_t _notify_ready;
|
|
|
|
int _state;
|
|
bool _running;
|
|
|
|
int _npfds;
|
|
struct pollfd *_pfds;
|
|
|
|
double _sample_length_us;
|
|
double _period_length_us;
|
|
size_t _samples_per_period;
|
|
uint64_t _clock_monotonic;
|
|
|
|
struct MidiEventHeader {
|
|
uint64_t time;
|
|
size_t size;
|
|
MidiEventHeader(const uint64_t t, const size_t s)
|
|
: time(t)
|
|
, size(s) {}
|
|
};
|
|
|
|
PBD::RingBuffer<uint8_t>* _rb;
|
|
|
|
std::string _name;
|
|
|
|
virtual void init (const char *device_name, const bool input) = 0;
|
|
|
|
};
|
|
|
|
class AlsaMidiOut : virtual public AlsaMidiIO
|
|
{
|
|
public:
|
|
AlsaMidiOut ();
|
|
|
|
int send_event (const pframes_t, const uint8_t *, const size_t);
|
|
};
|
|
|
|
class AlsaMidiIn : virtual public AlsaMidiIO
|
|
{
|
|
public:
|
|
AlsaMidiIn ();
|
|
|
|
size_t recv_event (pframes_t &, uint8_t *, size_t &);
|
|
|
|
protected:
|
|
int queue_event (const uint64_t, const uint8_t *, const size_t);
|
|
};
|
|
|
|
} // namespace
|
|
|
|
#endif
|