2 Copyright (C) 1998-2010 Paul Barton-Davis
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 2 of the License, or
6 (at your option) any later version.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __libardour_async_midiport_h__
20 #define __libardour_async_midiport_h__
25 #include "pbd/xml++.h"
26 #include "pbd/crossthread.h"
27 #include "pbd/signals.h"
28 #include "pbd/ringbuffer.h"
30 #include "evoral/Event.hpp"
31 #include "evoral/EventRingBuffer.hpp"
33 #include "midi++/types.h"
34 #include "midi++/parser.h"
35 #include "midi++/port.h"
37 #include "ardour/libardour_visibility.h"
38 #include "ardour/midi_port.h"
42 class LIBARDOUR_API AsyncMIDIPort : public ARDOUR::MidiPort, public MIDI::Port {
45 AsyncMIDIPort (std::string const &, PortFlags);
48 /* called from an RT context */
50 void cycle_start (pframes_t nframes);
51 void cycle_end (pframes_t nframes);
53 /* called from non-RT context */
55 void parse (framecnt_t timestamp);
56 int write (const MIDI::byte *msg, size_t msglen, MIDI::timestamp_t timestamp);
57 int read (MIDI::byte *buf, size_t bufsize);
58 void drain (int check_interval_usecs);
59 int selectable () const { return xthread.selectable(); }
61 static void set_process_thread (pthread_t);
62 static pthread_t get_process_thread () { return _process_thread; }
63 static bool is_process_thread();
66 bool _currently_in_cycle;
67 MIDI::timestamp_t _last_write_timestamp;
68 RingBuffer< Evoral::Event<double> > output_fifo;
69 Evoral::EventRingBuffer<MIDI::timestamp_t> input_fifo;
70 Glib::Threads::Mutex output_fifo_lock;
71 CrossThreadChannel xthread;
73 void flush_output_fifo (pframes_t);
75 static pthread_t _process_thread;
80 #endif /* __libardour_async_midiport_h__ */