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 1.13 2008/04/28 20:23:47 martin 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  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/callout.h>
   33 
   34 struct midi_softc;
   35 
   36 struct syn_timer {
   37         struct  timeval reftime, stoptime;
   38         uint16_t        tempo_beatpermin, timebase_divperbeat;
   39         uint32_t        usperdiv;
   40         uint32_t        divs_lastevent;
   41         uint32_t        divs_lastchange;
   42         int             running;
   43 };
   44 
   45 #define SEQ_MAXQ 256
   46 struct sequencer_queue {
   47         seq_event_t buf[SEQ_MAXQ];
   48         u_int   in;             /* input index in buf */
   49         u_int   out;            /* output index in buf */
   50         u_int   count;          /* filled slots in buf */
   51 };
   52 #define SEQ_QINIT(q) ((q)->in = (q)->out = (q)->count = 0)
   53 #define SEQ_QEMPTY(q) ((q)->count == 0)
   54 #define SEQ_QFULL(q) ((q)->count >= SEQ_MAXQ)
   55 #define SEQ_QPUT(q, e) ((q)->buf[(q)->in++] = (e), (q)->in %= SEQ_MAXQ, (q)->count++)
   56 #define SEQ_QGET(q, e) ((e) = (q)->buf[(q)->out++], (q)->out %= SEQ_MAXQ, (q)->count--)
   57 #define SEQ_QLEN(q) ((q)->count)
   58 
   59 struct sequencer_softc;
   60 
   61 #define MAXCHAN 16
   62 struct midi_dev {
   63         const char *name;
   64         int     subtype;
   65         int     capabilities;
   66         int     nr_voices;
   67         int     instr_bank_size;
   68         int     unit;
   69         struct  sequencer_softc *seq;
   70         struct  midi_softc *msc;
   71         char    doingsysex;     /* doing a SEQ_SYSEX */
   72 };
   73 
   74 struct sequencer_softc {
   75         struct  device dev;
   76         struct  device *sc_dev; /* Hardware device struct */
   77         struct  callout sc_callout;
   78         int     isopen;         /* Open indicator */
   79         int     flags;          /* Open flags */
   80         int     mode;
   81 #define SEQ_OLD 0
   82 #define SEQ_NEW 1
   83         int     rchan, wchan;
   84         int     pbus;
   85         struct  selinfo wsel;   /* write selector */
   86         struct  selinfo rsel;   /* read selector */
   87         struct  proc *async;    /* process who wants audio SIGIO */
   88         void    *sih;
   89 
   90         int     nmidi;          /* number of MIDI devices */
   91         struct  midi_dev **devs;
   92         struct  syn_timer timer;
   93 
   94         struct  sequencer_queue outq; /* output event queue */
   95         u_int   lowat;          /* output queue low water mark */
   96         char    timeout;        /* timeout has been set */
   97 
   98         struct  sequencer_queue inq; /* input event queue */
   99         u_long  input_stamp;
  100 };
  101 
  102 void seq_event_intr(void *, seq_event_t *);
  103 
  104 #define SEQUENCERUNIT(d) ((d) & 0x7f)
  105 #define SEQ_IS_OLD(d) ((d) & 0x80)
  106 

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