win_midiout.h

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/*
Copyright (C) 2000, 2001, 2002  Ryan Nunn

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef WIN_MIDIOUT_H
#define WIN_MIDIOUT_H

#if defined(WIN32) && !defined(UNDER_CE)

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

// These will prevent inclusion of mmsystem sections
#define MMNODRV         // Installable driver support
#define MMNOSOUND       // Sound support
#define MMNOWAVE        // Waveform support
#define MMNOAUX         // Auxiliary audio support
#define MMNOMIXER       // Mixer support
#define MMNOTIMER       // Timer support
#define MMNOJOY         // Joystick support
#define MMNOMCI         // MCI support
#define MMNOMMIO        // Multimedia file I/O support

#include <windows.h>
#include <mmsystem.h>

#include "../Midi.h"
#include "exceptions.h"

class Windows_MidiOut : virtual public MidiAbstract
{
public:
  virtual void start_track(XMIDIEventList *, bool repeat);
  virtual void start_sfx(XMIDIEventList *);
  virtual void stop_track(void);
  virtual void stop_sfx(void);
  virtual bool is_playing(void);
  virtual const char *copyright(void);

  Windows_MidiOut();
  virtual ~Windows_MidiOut();

private:
  UNREPLICATABLE_CLASS(Windows_MidiOut);

  struct mid_data {
    XMIDIEventList  *list;
    bool      repeat;
  };

  static const unsigned short centre_value;
  static const unsigned char  fine_value;
  static const unsigned char  coarse_value;
  static const unsigned short combined_value;

  signed int  dev_num;
  HMIDIOUT  midi_port;
  
  HANDLE    *thread_handle;
  DWORD   thread_id;

  // Thread communicatoins
  LONG    is_available;
  LONG    playing;
  LONG    s_playing;
  LONG    thread_com;
  LONG    sfx_com;

  mid_data *thread_data;
  mid_data *sfx_data;

  mid_data data;
  mid_data sdata;

  // Methods
  static DWORD __stdcall thread_start(void *data);
  void init_device();
  DWORD thread_main();
  void thread_play ();
  void reset_channel (int i);

  // Microsecond Clock
  unsigned long start;
  unsigned long sfx_start;

  inline void wmoInitClock ()
  { start = GetTickCount()*6; }

  inline void wmoAddOffset (unsigned long offset)
  { start += offset; }

  inline unsigned long wmoGetTime ()
  { return GetTickCount()*6 - start; }

  inline unsigned long wmoGetStart ()
  { return start; }

  inline unsigned long wmoGetRealTime ()
  { return GetTickCount()*6; }

  inline void wmoInitSFXClock ()
  { sfx_start = GetTickCount()*6; }

  inline void wmoAddSFXOffset (unsigned long offset)
  { sfx_start += offset; }

  inline unsigned long wmoGetSFXTime ()
  { return GetTickCount()*6 - sfx_start; }

  inline unsigned long wmoGetSFXStart ()
  { return sfx_start; }
};

#endif //WIN32

#endif //WIN_MIDIOUT_H

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