IABSD.fr/src/sys/dev/midivar.h

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• Author : jsg
  Date : 2024-10-14 00:47:36
  Hash : f007d8ce
  Message : remove unneeded proc.h include

• sys/dev/midivar.h

• /*	$OpenBSD: midivar.h,v 1.15 2024/10/14 00:47:36 jsg Exp $	*/
  
  /*
   * Copyright (c) 2003, 2004 Alexandre Ratchov
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #ifndef _SYS_DEV_MIDIVAR_H_
  #define _SYS_DEV_MIDIVAR_H_
  
  #include <dev/midi_if.h>
  #include <sys/device.h>
  #include <sys/event.h>
  #include <sys/timeout.h>
  
  #define MIDI_RATE	3125	/* midi uart baud rate in bytes/second */
  
  /*
   * simple ring buffer
   */
  #define MIDIBUF_SIZE		(1 << 10)
  #define MIDIBUF_MASK		(MIDIBUF_SIZE - 1)
  
  struct midi_buffer {
  	struct	      klist klist;	/* to record & wakeup poll(2) */
  	int	      blocking;		/* read/write blocking */
  	unsigned char data[MIDIBUF_SIZE]; 
  	unsigned      start, used;
  };
  
  #define MIDIBUF_START(buf)	((buf)->start)
  #define MIDIBUF_END(buf)	(((buf)->start + (buf)->used) & MIDIBUF_MASK)
  #define MIDIBUF_USED(buf)	((buf)->used)
  #define MIDIBUF_AVAIL(buf)	(MIDIBUF_SIZE - (buf)->used)
  #define MIDIBUF_ISFULL(buf)	((buf)->used >= MIDIBUF_SIZE)
  #define MIDIBUF_ISEMPTY(buf)	((buf)->used == 0)
  #define MIDIBUF_WRITE(buf, byte) 				\
  	do {							\
  		(buf)->data[MIDIBUF_END(buf)] = (byte);		\
  		(buf)->used++;					\
  	} while(0)
  #define MIDIBUF_READ(buf, byte)					\
  	do {							\
  		(byte) = (buf)->data[(buf)->start++];		\
  		(buf)->start &= MIDIBUF_MASK;			\
  		(buf)->used--;					\
  	} while(0)
  #define MIDIBUF_REMOVE(buf, count)				\
  	do {							\
  		(buf)->start += (count);			\
  		(buf)->start &= MIDIBUF_MASK;			\
  		(buf)->used  -= (count);			\
  	} while(0)
  #define MIDIBUF_INIT(buf) 					\
  	do {							\
  		(buf)->start = (buf)->used = 0;			\
  	} while(0)
  	
  
  struct midi_softc {
  	struct device	    dev;
  	const struct midi_hw_if *hw_if;
  	void		   *hw_hdl;
  	int		    isbusy;		/* concerns only the output */
  	int		    flags;		/* open flags */
  	int		    props;		/* midi hw proprieties */
  	struct timeout	    timeo;
  	struct midi_buffer  inbuf;
  	struct midi_buffer  outbuf;
  };
  
  #endif /* _SYS_DEV_MIDIVAR_H_ */