148 lines
3.4 KiB
C++
148 lines
3.4 KiB
C++
/*
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Copyright (C) 1998-99 Paul Barton-Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#ifndef __libmidi_port_h__
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#define __libmidi_port_h__
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#include <string>
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#include <sigc++/sigc++.h>
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#include <pbd/selectable.h>
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#include <midi++/types.h>
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#include <midi++/parser.h>
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namespace MIDI {
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class Channel;
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class PortRequest;
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class Port : public sigc::trackable {
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public:
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enum Type {
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Unknown,
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ALSA_RawMidi,
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ALSA_Sequencer,
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CoreMidi_MidiPort,
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Null,
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FIFO,
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};
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Port (PortRequest &);
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virtual ~Port ();
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/* Direct I/O */
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virtual int write (byte *msg, size_t msglen) = 0;
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virtual int read (byte *buf, size_t max) = 0;
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/* slowdown i/o to a loop of single byte emissions
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interspersed with a busy loop of 10000 * this value.
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This may be ignored by a particular instance
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of this virtual class. See FD_MidiPort for an
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example of where it used.
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*/
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void set_slowdown (size_t n) { slowdown = n; }
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/* select(2)/poll(2)-based I/O */
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virtual int selectable() const = 0;
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void selector_read_callback (Select::Selectable *, Select::Condition);
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static void xforms_read_callback (int cond, int fd, void *ptr);
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static void gtk_read_callback (void *ptr, int fd, int cond);
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static void write_callback (byte *msg, unsigned int len, void *);
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Channel *channel (channel_t chn) {
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return _channel[chn&0x7F];
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}
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Parser *input() { return input_parser; }
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Parser *output() { return output_parser; }
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void iostat (int *written, int *read,
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const size_t **in_counts,
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const size_t **out_counts) {
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*written = bytes_written;
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*read = bytes_read;
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if (input_parser) {
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*in_counts = input_parser->message_counts();
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} else {
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*in_counts = 0;
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}
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if (output_parser) {
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*out_counts = output_parser->message_counts();
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} else {
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*out_counts = 0;
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}
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}
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int midimsg (byte *msg, size_t len) {
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return !(write (msg, len) == (int) len);
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}
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int three_byte_msg (byte a, byte b, byte c) {
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byte msg[3];
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msg[0] = a;
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msg[1] = b;
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msg[2] = c;
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return !(write (msg, 3) == 3);
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}
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int clock ();
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const char *device () const { return _devname.c_str(); }
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const char *name () const { return _tagname.c_str(); }
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Type type () const { return _type; }
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int mode () const { return _mode; }
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bool ok () const { return _ok; }
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size_t number () const { return _number; }
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protected:
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bool _ok;
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Type _type;
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std::string _devname;
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std::string _tagname;
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int _mode;
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size_t _number;
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Channel *_channel[16];
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sigc::connection thru_connection;
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unsigned int bytes_written;
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unsigned int bytes_read;
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Parser *input_parser;
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Parser *output_parser;
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size_t slowdown;
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private:
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static size_t nports;
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};
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}; /* namespace MIDI */
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#endif // __libmidi_port_h__
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