/*      $NetBSD: sequencervar.h,v 1.17 2014/12/22 07:02:22 mrg Exp $    */

/*
 * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (augustss@NetBSD.org).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/callout.h>
#include <sys/vnode.h>

struct midi_softc;

struct syn_timer {
        struct  timeval reftime, stoptime;
        uint16_t        tempo_beatpermin, timebase_divperbeat;
        uint32_t        usperdiv;
        uint32_t        divs_lastevent;
        uint32_t        divs_lastchange;
        int             running;
};

#define SEQ_MAXQ 256
struct sequencer_queue {
        seq_event_t buf[SEQ_MAXQ];
        u_int   in;             /* input index in buf */
        u_int   out;            /* output index in buf */
        u_int   count;          /* filled slots in buf */
};
#define SEQ_QINIT(q) ((q)->in = (q)->out = (q)->count = 0)
#define SEQ_QEMPTY(q) ((q)->count == 0)
#define SEQ_QFULL(q) ((q)->count >= SEQ_MAXQ)
#define SEQ_QPUT(q, e) ((q)->buf[(q)->in++] = (e), (q)->in %= SEQ_MAXQ, (q)->count++)
#define SEQ_QGET(q, e) ((e) = (q)->buf[(q)->out++], (q)->out %= SEQ_MAXQ, (q)->count--)
#define SEQ_QLEN(q) ((q)->count)

struct sequencer_softc;

#define MAXCHAN 16
struct midi_dev {
        const char *name;
        int     subtype;
        int     capabilities;
        int     nr_voices;
        int     instr_bank_size;
        int     unit;
        struct  sequencer_softc *seq;
        char    doingsysex;     /* doing a SEQ_SYSEX */
        vnode_t *vp;
};

struct sequencer_softc {
        callout_t sc_callout;
        kmutex_t lock;
        kcondvar_t wchan;
        kcondvar_t rchan;
        kcondvar_t lchan;
        int     dvlock;
        int     dying;
        u_int   isopen;         /* Open indicator */
        int     flags;          /* Open flags */
        int     mode;
#define SEQ_OLD 0
#define SEQ_NEW 1
        int     pbus;
        struct selinfo wsel;    /* write selector */
        struct selinfo rsel;    /* read selector */
        pid_t   async;  /* process who wants audio SIGIO */
        void    *sih;
        pcq_t   *pcq;

        int     nmidi;          /* number of MIDI devices */
        int     ndevs;
        struct  midi_dev **devs;
        struct  syn_timer timer;

        struct  sequencer_queue outq; /* output event queue */
        u_int   lowat;          /* output queue low water mark */
        char    timeout;        /* timeout has been set */

        struct  sequencer_queue inq; /* input event queue */
        u_long  input_stamp;
        int     sc_unit;
        LIST_ENTRY(sequencer_softc) sc_link;
};

void seq_event_intr(void *, seq_event_t *);

#define SEQUENCERUNIT(d) ((d) & 0x7f)
#define SEQ_IS_OLD(d) ((d) & 0x80)