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/*
Copyright (C) 1998-2010 Paul Barton-Davis
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 __libardour_async_midiport_h__
#define __libardour_async_midiport_h__
#include <string>
#include <iostream>
#include <boost/function.hpp>
#include "pbd/xml++.h"
#include "pbd/crossthread.h"
#include "pbd/signals.h"
#include "pbd/ringbuffer.h"
#include "evoral/Event.hpp"
#include "midi++/types.h"
#include "midi++/parser.h"
#include "midi++/port.h"
#include "ardour/event_ring_buffer.h"
#include "ardour/libardour_visibility.h"
#include "ardour/midi_port.h"
namespace ARDOUR {
class LIBARDOUR_API AsyncMIDIPort : public ARDOUR::MidiPort, public MIDI::Port {
public:
AsyncMIDIPort (std::string const &, PortFlags);
~AsyncMIDIPort ();
bool flush_at_cycle_start () const { return _flush_at_cycle_start; }
void set_flush_at_cycle_start (bool en) { _flush_at_cycle_start = en; }
/* called from an RT context */
void cycle_start (pframes_t nframes);
void cycle_end (pframes_t nframes);
/* called from non-RT context */
void parse (samplecnt_t timestamp);
int write (const MIDI::byte *msg, size_t msglen, MIDI::timestamp_t timestamp);
int read (MIDI::byte *buf, size_t bufsize);
/* waits for output to be cleared */
void drain (int check_interval_usecs, int total_usecs_to_wait);
/* clears async request communication channel */
void clear () {
_xthread.drain ();
}
CrossThreadChannel& xthread() {
return _xthread;
}
/* Not selectable; use ios() */
int selectable() const { return -1; }
void set_timer (boost::function<samplecnt_t (void)>&);
static void set_process_thread (pthread_t);
static pthread_t get_process_thread () { return _process_thread; }
static bool is_process_thread();
private:
bool _currently_in_cycle;
MIDI::timestamp_t _last_write_timestamp;
bool _flush_at_cycle_start;
bool have_timer;
boost::function<samplecnt_t (void)> timer;
PBD::RingBuffer< Evoral::Event<double> > output_fifo;
EventRingBuffer<MIDI::timestamp_t> input_fifo;
Glib::Threads::Mutex output_fifo_lock;
CrossThreadChannel _xthread;
int create_port ();
/** Channel used to signal to the MidiControlUI that input has arrived */
std::string _connections;
PBD::ScopedConnection connect_connection;
PBD::ScopedConnection halt_connection;
void jack_halted ();
void make_connections ();
void init (std::string const &, Flags);
void flush_output_fifo (pframes_t);
static pthread_t _process_thread;
};
} // namespace ARDOUR
#endif /* __libardour_async_midiport_h__ */
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