/* $OpenBSD: midivar.h,v 1.6 2012/03/30 08:18:19 ratchov 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 #include #include #include #include #define MIDI_MAXWRITE 32 /* max bytes to give to the uart at once */ #define MIDI_RATE 3125 /* midi uart baud rate in bytes/second */ #define MIDI_UNIT(a) ((a) & 0xff) #define MIDI_DEV2SC(a) (midi_cd.cd_devs[MIDI_UNIT(a)]) #include "sequencer.h" #if NSEQUENCER > 0 struct midi_dev; /* defined in sequencervar.h */ #endif /* * simple ring buffer */ #define MIDIBUF_SIZE (1 << 10) #define MIDIBUF_MASK (MIDIBUF_SIZE - 1) struct midi_buffer { 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; struct midi_hw_if *hw_if; void *hw_hdl; int isopen; int isbusy; /* concerns only the output */ int isdying; int flags; /* open flags */ int props; /* midi hw proprieties */ int rchan; int wchan; struct selinfo rsel; struct selinfo wsel; struct proc *async; struct timeout timeo; struct midi_buffer inbuf; struct midi_buffer outbuf; #if NSEQUENCER > 0 int seqopen; struct midi_dev *seq_md; /* structure that links us with the seq. */ int evindex; unsigned char evstatus; unsigned char evdata[2]; #endif /* NSEQUENCER > 0 */ }; #endif /* _SYS_DEV_MIDIVAR_H_ */