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 __libmidi_port_base_h__
20 #define __libmidi_port_base_h__
25 #include <jack/types.h> /* XXX ... desirable to get rid of this but needed for
26 * now due to use of JackPortIsXXXX
31 #include "pbd/xml++.h"
32 #ifndef PLATFORM_WINDOWS
33 #include "pbd/crossthread.h"
35 #include "pbd/signals.h"
36 #include "pbd/ringbuffer.h"
38 #include "midi++/types.h"
39 #include "midi++/parser.h"
49 IsInput = JackPortIsInput,
50 IsOutput = JackPortIsOutput,
53 Port (std::string const &, Flags);
54 Port (const XMLNode&);
57 virtual XMLNode& get_state () const;
58 virtual void set_state (const XMLNode&);
60 /** Write a message to port.
61 * @param msg Raw MIDI message to send
62 * @param msglen Size of @a msg
63 * @param timestamp Time stamp in frames of this message (relative to cycle start)
64 * @return number of bytes successfully written
66 virtual int write (const byte *msg, size_t msglen, timestamp_t timestamp) = 0;
68 /** Read raw bytes from a port.
69 * @param buf memory to store read data in
70 * @param bufsize size of @a buf
71 * @return number of bytes successfully read, negative if error
73 virtual int read (byte *buf, size_t bufsize) = 0;
75 /** block until the output FIFO used by non-process threads
76 * is empty, checking every @a check_interval_usecs usecs
77 * for current status. Not to be called by a thread that
78 * executes any part of a JACK process callback (will
79 * simply return immediately in that situation).
81 virtual void drain (int /* check_interval_usecs */) {}
83 /** Write a message to port.
84 * @return true on success.
85 * FIXME: describe semantics here
87 int midimsg (byte *msg, size_t len, timestamp_t timestamp) {
88 return !(write (msg, len, timestamp) == (int) len);
91 virtual void parse (framecnt_t timestamp) = 0;
93 bool clock (timestamp_t timestamp);
95 /* select(2)/poll(2)-based I/O */
97 /** Get the file descriptor for port.
98 * @return File descriptor, or -1 if not selectable.
100 virtual int selectable () const = 0;
102 Channel *channel (channel_t chn) {
103 return _channel[chn&0x7F];
110 const char *name () const { return _tagname.c_str(); }
111 bool ok () const { return _ok; }
113 virtual bool centrally_parsed() const;
114 void set_centrally_parsed (bool yn) { _centrally_parsed = yn; }
116 bool receives_input () const {
117 return _flags == IsInput;
120 bool sends_output () const {
121 return _flags == IsOutput;
128 Descriptor (const XMLNode&);
129 XMLNode& get_state();
132 static std::string state_node_name;
136 std::string _tagname;
137 Channel* _channel[16];
140 bool _centrally_parsed;
142 void init (std::string const &, Flags);
146 PortSet (std::string str) : owner (str) { }
149 std::list<XMLNode> ports;
152 std::ostream & operator << (std::ostream& os, const Port& port);
156 #endif // __libmidi_port_base_h__