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midiport.cc

/*
    Copyright (C) 1998 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.

    $Id: midiport.cc,v 1.3 2004/02/22 23:04:01 taybin Exp $
*/

#include <cstdio>
#include <fcntl.h>

#include <midi++/types.h>
#include <midi++/port.h>
#include <midi++/channel.h>
#include <midi++/port_request.h>

using namespace Select;
using namespace MIDI;

size_t Port::nports = 0;

Port::Port (PortRequest &req)

{
      _ok = false;  /* derived class must set to true if constructor
                   succeeds.
                  */

      bytes_written = 0;
      bytes_read = 0;
      input_parser = 0;
      output_parser = 0;
      slowdown = 0;

      _devname = req.devname;
      _tagname = req.tagname;
      _mode = req.mode;
      _number = nports++;

      if (_mode == O_RDONLY || _mode == O_RDWR) {
            input_parser = new Parser (*this);
      } else {
            input_parser = 0;
      }

      if (_mode == O_WRONLY || _mode == O_RDWR) {
            output_parser = new Parser (*this);
      } else {
            output_parser = 0;
      }

      for (int i = 0; i < 16; i++) {
            _channel[i] =  new Channel (i, *this);

            if (input_parser) {
                  _channel[i]->connect_input_signals ();
            }

            if (output_parser) {
                  _channel[i]->connect_output_signals ();
            }
      }
}


Port::~Port ()
      
{
      for (int i = 0; i < 16; i++) {
            delete _channel[i];
      }
}

int
Port::clock ()
      
{
      static byte clockmsg = 0xf8;
      
      if (_mode != O_RDONLY) {
            return midimsg (&clockmsg, 1);
      }
      
      return 0;
}

void
Port::selector_read_callback (Selectable *s, Select::Condition cond) 

{
      byte buf[64];
      read (buf, sizeof (buf));
}

void
Port::xforms_read_callback (int cond, int fd, void *ptr) 

{
      byte buf[64];
      
      ((Port *)ptr)->read (buf, sizeof (buf));
}

void
Port::gtk_read_callback (void *ptr, int fd, int cond)

{
      byte buf[64];
      
      ((Port *)ptr)->read (buf, sizeof (buf));
}

void
Port::write_callback (byte *msg, unsigned int len, void *ptr)
      
{
      ((Port *)ptr)->write (msg, len);
}


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