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channel.h

/*
    Copyright (C) 1998-99 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: channel.h,v 1.1 2001/11/24 00:31:57 pbd Exp $
*/

#ifndef __midichannel_h__
#define __midichannel_h__

#include <queue>
#include <sigc++/signal_system.h>

#include <midi++/types.h>
#include <midi++/parser.h>

namespace MIDI {

class Port;

class Channel : public SigC::Object {

  public:
      Channel (byte channel_number, Port &);

      Port &midi_port()               { return port; }
      byte channel()                  { return channel_number; }
      byte program()                  { return program_number; }
      byte bank()                     { return bank_number; }
      byte pressure ()                { return chanpress; }
      byte poly_pressure (byte n)     { return polypress[n]; }

      byte last_note_on () { 
            return _last_note_on;
      }
      byte last_on_velocity () { 
            return _last_on_velocity;
      }
      byte last_note_off () { 
            return _last_note_off;
      }
      byte last_off_velocity () { 
            return _last_off_velocity;
      }

      pitchbend_t pitchbend () { 
            return pitch_bend;
      }

      controller_value_t controller_value (byte n) { 
            return controller_val[n%128];
      }

      controller_value_t *controller_addr (byte n) {
            return &controller_val[n%128];
      }

      void set_controller (byte n, byte val) {
            controller_val[n%128] = val;
      }

      int channel_msg (byte id, byte val1, byte val2);

      int all_notes_off () {
            return channel_msg (MIDI::controller, 123, 0);
      }
      
      int control (byte id, byte value) {
            return channel_msg (MIDI::controller, id, value);
      }
      
      int note_on (byte note, byte velocity) {
            return channel_msg (MIDI::on, note, velocity);
      }
      
      int note_off (byte note, byte velocity) {
            return channel_msg (MIDI::off, note, velocity);
      }
      
      int aftertouch (byte value) {
            return channel_msg (MIDI::chanpress, value, 0);
      }

      int poly_aftertouch (byte note, byte value) {
            return channel_msg (MIDI::polypress, note, value);
      }

      int program_change (byte value) {
            return channel_msg (MIDI::program, value, 0);
      }

      int pitchbend (byte msb, byte lsb) {
            return channel_msg (MIDI::pitchbend, lsb, msb);
      }

  protected:
      friend class Port;
      void connect_input_signals ();
      void connect_output_signals ();

  private:
      Port &port;

      /* Current channel values */

      byte     channel_number;
        byte     bank_number;
      byte     program_number;
      byte     rpn_msb;
      byte     rpn_lsb;
      byte     nrpn_msb;
      byte     nrpn_lsb;
      byte     chanpress;
      byte     polypress[128];
      bool         controller_14bit[128];
      controller_value_t  controller_val[128];
      byte     controller_msb[128];
      byte     controller_lsb[128];
      byte     _last_note_on;
      byte     _last_on_velocity;
      byte     _last_note_off;
      byte     _last_off_velocity;
      pitchbend_t  pitch_bend;
      bool         _omni;
      bool         _poly;
      bool         _mono;
      size_t       _notes_on;

      void reset (bool notes_off = true);
      
      void process_note_off (Parser &, EventTwoBytes *);
      void process_note_on (Parser &, EventTwoBytes *);
      void process_controller (Parser &, EventTwoBytes *);
      void process_polypress (Parser &, EventTwoBytes *);
      void process_program_change (Parser &, byte);
      void process_chanpress (Parser &, byte);
      void process_pitchbend (Parser &, pitchbend_t);
      void process_reset (Parser &);
};

}; /* namespace MIDI */

#endif // __midichannel_h__





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