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Annotation of src/usr.bin/sndiod/midi.h, Revision 1.1

1.1     ! ratchov     1: /*     $OpenBSD$       */
        !             2: /*
        !             3:  * Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
        !             4:  *
        !             5:  * Permission to use, copy, modify, and distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17: #ifndef MIDI_H
        !            18: #define MIDI_H
        !            19:
        !            20: #include "abuf.h"
        !            21: #include "miofile.h"
        !            22:
        !            23: /*
        !            24:  * masks to extract command and channel of status byte
        !            25:  */
        !            26: #define MIDI_CMDMASK   0xf0
        !            27: #define MIDI_CHANMASK  0x0f
        !            28:
        !            29: /*
        !            30:  * MIDI status bytes of voice messages
        !            31:  */
        !            32: #define MIDI_NOFF      0x80            /* note off */
        !            33: #define MIDI_NON       0x90            /* note on */
        !            34: #define MIDI_KAT       0xa0            /* key after touch */
        !            35: #define MIDI_CTL       0xb0            /* controller */
        !            36: #define MIDI_PC                0xc0            /* program change */
        !            37: #define MIDI_CAT       0xd0            /* channel after touch */
        !            38: #define MIDI_BEND      0xe0            /* pitch bend */
        !            39: #define MIDI_ACK       0xfe            /* active sensing message */
        !            40:
        !            41: /*
        !            42:  * MIDI controller numbers
        !            43:  */
        !            44: #define MIDI_CTL_VOL   7               /* volume */
        !            45:
        !            46: /*
        !            47:  * Max coarse value
        !            48:  */
        !            49: #define MIDI_MAXCTL            127
        !            50:
        !            51: /*
        !            52:  * midi stream state structure
        !            53:  */
        !            54:
        !            55: struct midiops
        !            56: {
        !            57:        void (*imsg)(void *, unsigned char *, int);
        !            58:        void (*omsg)(void *, unsigned char *, int);
        !            59:        void (*fill)(void *, int);
        !            60:        void (*exit)(void *);
        !            61: };
        !            62:
        !            63: struct midi {
        !            64:        struct midiops *ops;            /* port/sock/dev callbacks */
        !            65:        struct midi *owner;             /* current writer stream */
        !            66:        unsigned int mode;              /* MODE_{MIDIIN,MIDIOUT} */
        !            67:        void *arg;                      /* user data for callbacks */
        !            68: #define MIDI_MSGMAX    16              /* max size of MIDI msg */
        !            69:        unsigned char msg[MIDI_MSGMAX]; /* parsed input message */
        !            70:        unsigned int st;                /* input MIDI running status */
        !            71:        unsigned int used;              /* bytes used in ``msg'' */
        !            72:        unsigned int idx;               /* current ``msg'' size */
        !            73:        unsigned int len;               /* expected ``msg'' length */
        !            74:        unsigned int txmask;            /* list of ep we send to */
        !            75:        unsigned int rxmask;            /* single ep we accept data for */
        !            76:        struct abuf ibuf;               /* input buffer */
        !            77:        struct abuf obuf;               /* output buffer */
        !            78: };
        !            79:
        !            80: /*
        !            81:  * midi port
        !            82:  */
        !            83: struct port {
        !            84:        struct port *next;
        !            85:        struct port_mio mio;
        !            86: #define PORT_CFG       0
        !            87: #define PORT_INIT      1
        !            88: #define PORT_DRAIN     2
        !            89:        unsigned int state;
        !            90:        char *path;
        !            91:        struct midi *midi;
        !            92:        unsigned int refs;
        !            93: };
        !            94:
        !            95: /*
        !            96:  * midi control ports
        !            97:  */
        !            98: extern struct port *port_list;
        !            99:
        !           100: void midi_init(void);
        !           101: void midi_done(void);
        !           102: struct midi *midi_new(struct midiops *, void *, int);
        !           103: void midi_del(struct midi *);
        !           104: void midi_log(struct midi *);
        !           105: int midi_in(struct midi *);
        !           106: void midi_out(struct midi *, unsigned char *, int);
        !           107: void midi_send(struct midi *, unsigned char *, int);
        !           108: void midi_fill(struct midi *);
        !           109: void midi_tag(struct midi *, unsigned int);
        !           110: void midi_untag(struct midi *, unsigned int);
        !           111:
        !           112: struct port *port_new(char *, unsigned int);
        !           113: struct port *port_bynum(int);
        !           114: void port_del(struct port *);
        !           115: int  port_init(struct port *);
        !           116: void port_done(struct port *);
        !           117: int  port_close(struct port *);
        !           118:
        !           119: #endif /* !defined(MIDI_H) */