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 <boost/function.hpp>
27 #include "pbd/xml++.h"
28 #include "pbd/crossthread.h"
29 #include "pbd/signals.h"
30 #include "pbd/ringbuffer.h"
32 #include "evoral/Event.hpp"
34 #include "midi++/types.h"
35 #include "midi++/parser.h"
36 #include "midi++/port.h"
38 #include "ardour/event_ring_buffer.h"
39 #include "ardour/libardour_visibility.h"
40 #include "ardour/midi_port.h"
44 class LIBARDOUR_API AsyncMIDIPort : public ARDOUR::MidiPort, public MIDI::Port {
47 AsyncMIDIPort (std::string const &, PortFlags);
50 /* called from an RT context */
52 void cycle_start (pframes_t nframes);
53 void cycle_end (pframes_t nframes);
55 /* called from non-RT context */
57 void parse (framecnt_t timestamp);
58 int write (const MIDI::byte *msg, size_t msglen, MIDI::timestamp_t timestamp);
59 int read (MIDI::byte *buf, size_t bufsize);
60 /* waits for output to be cleared */
61 void drain (int check_interval_usecs, int total_usecs_to_wait);
63 /* clears async request communication channel */
68 CrossThreadChannel& xthread() {
72 /* Not selectable; use ios() */
73 int selectable() const { return -1; }
74 void set_timer (boost::function<framecnt_t (void)>&);
76 static void set_process_thread (pthread_t);
77 static pthread_t get_process_thread () { return _process_thread; }
78 static bool is_process_thread();
81 bool _currently_in_cycle;
82 MIDI::timestamp_t _last_write_timestamp;
84 boost::function<framecnt_t (void)> timer;
85 RingBuffer< Evoral::Event<double> > output_fifo;
86 EventRingBuffer<MIDI::timestamp_t> input_fifo;
87 Glib::Threads::Mutex output_fifo_lock;
88 CrossThreadChannel _xthread;
92 /** Channel used to signal to the MidiControlUI that input has arrived */
94 std::string _connections;
95 PBD::ScopedConnection connect_connection;
96 PBD::ScopedConnection halt_connection;
97 void flush (void* jack_port_buffer);
99 void make_connections ();
100 void init (std::string const &, Flags);
102 void flush_output_fifo (pframes_t);
104 static pthread_t _process_thread;
107 } // namespace ARDOUR
109 #endif /* __libardour_async_midiport_h__ */