The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/sequencervar.h

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    1 /*      $NetBSD: sequencervar.h,v 1.7 2003/12/04 13:57:30 keihan Exp $  */
    2 
    3 /*
    4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Lennart Augustsson (augustss@NetBSD.org).
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #include <sys/callout.h>
   40 
   41 struct midi_softc;
   42 
   43 struct syn_timer {
   44         struct  timeval start, stop;
   45         int     tempo, timebase;
   46         u_long  last;
   47         u_long  tick;
   48         int     running;
   49 };
   50 
   51 #define SEQ_MAXQ 256
   52 struct sequencer_queue {
   53         seq_event_rec buf[SEQ_MAXQ];
   54         u_int   in;             /* input index in buf */
   55         u_int   out;            /* output index in buf */
   56         u_int   count;          /* filled slots in buf */
   57 };
   58 #define SEQ_QINIT(q) ((q)->in = (q)->out = (q)->count = 0)
   59 #define SEQ_QEMPTY(q) ((q)->count == 0)
   60 #define SEQ_QFULL(q) ((q)->count >= SEQ_MAXQ)
   61 #define SEQ_QPUT(q, e) ((q)->buf[(q)->in++] = (e), (q)->in %= SEQ_MAXQ, (q)->count++)
   62 #define SEQ_QGET(q, e) ((e) = (q)->buf[(q)->out++], (q)->out %= SEQ_MAXQ, (q)->count--)
   63 #define SEQ_QLEN(q) ((q)->count)
   64 
   65 struct sequencer_softc;
   66 
   67 #define MAXCHAN 16
   68 struct midi_dev {
   69         char    *name;
   70         int     subtype;
   71         int     capabilities;
   72         int     nr_voices;
   73         int     instr_bank_size;
   74         int     unit;
   75         u_char  last_cmd;
   76         struct  sequencer_softc *seq;
   77         struct  midi_softc *msc;
   78 };
   79 
   80 struct sequencer_softc {
   81         struct  device dev;
   82         struct  device *sc_dev; /* Hardware device struct */
   83         struct  callout sc_callout;
   84         int     isopen;         /* Open indicator */
   85         int     flags;          /* Open flags */
   86         int     mode;
   87 #define SEQ_OLD 0
   88 #define SEQ_NEW 1
   89         int     rchan, wchan;
   90         int     pbus;
   91         struct  selinfo wsel;   /* write selector */
   92         struct  selinfo rsel;   /* read selector */
   93         struct  proc *async;    /* process who wants audio SIGIO */
   94 
   95         char    doingsysex;     /* doing a SEQ_SYSEX */
   96 
   97         int     nmidi;          /* number of MIDI devices */
   98         struct  midi_dev **devs;
   99         struct  syn_timer timer;
  100 
  101         struct  sequencer_queue outq; /* output event queue */
  102         u_int   lowat;          /* output queue low water mark */
  103         char    timeout;        /* timeout has been set */
  104 
  105         struct  sequencer_queue inq; /* input event queue */
  106         u_long  input_stamp;
  107 };
  108 
  109 void seq_event_intr __P((void *, seq_event_rec *));
  110 
  111 #define SEQUENCERUNIT(d) ((d) & 0x7f)
  112 #define SEQ_IS_OLD(d) ((d) & 0x80)
  113 

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