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Annotation of src/usr.bin/sndiod/miofile.c, Revision 1.2

1.2     ! ratchov     1: /*     $OpenBSD: miofile.c,v 1.1 2012/11/23 07:03:28 ratchov Exp $     */
1.1       ratchov     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:
                     18: #include <sys/types.h>
                     19: #include <sys/time.h>
                     20:
                     21: #include <poll.h>
                     22: #include <stdio.h>
                     23: #include <stdlib.h>
                     24: #include <string.h>
                     25: #include <sndio.h>
                     26: #include "defs.h"
                     27: #include "file.h"
                     28: #include "midi.h"
                     29: #include "miofile.h"
                     30: #include "utils.h"
                     31:
                     32: int  port_mio_pollfd(void *, struct pollfd *);
                     33: int  port_mio_revents(void *, struct pollfd *);
                     34: void port_mio_in(void *);
                     35: void port_mio_out(void *);
                     36: void port_mio_hup(void *);
                     37:
                     38: struct fileops port_mio_ops = {
                     39:        "mio",
                     40:        port_mio_pollfd,
                     41:        port_mio_revents,
                     42:        port_mio_in,
                     43:        port_mio_out,
                     44:        port_mio_hup
                     45: };
                     46:
                     47: int
                     48: port_mio_open(struct port *p)
                     49: {
                     50:        p->mio.hdl = mio_open(p->path, p->midi->mode, 1);
                     51:        if (p->mio.hdl == NULL)
                     52:                return 0;
                     53:        p->mio.file = file_new(&port_mio_ops, p, p->path, mio_nfds(p->mio.hdl));
                     54:        return 1;
                     55: }
                     56:
                     57: void
                     58: port_mio_close(struct port *p)
                     59: {
                     60:        file_del(p->mio.file);
                     61:        mio_close(p->mio.hdl);
                     62: }
                     63:
                     64: int
                     65: port_mio_pollfd(void *addr, struct pollfd *pfd)
                     66: {
                     67:        struct port *p = addr;
                     68:        struct midi *ep = p->midi;
                     69:        int events = 0;
                     70:
1.2     ! ratchov    71:        if (ep->mode & MODE_MIDIIN)
1.1       ratchov    72:                events |= POLLIN;
                     73:        if ((ep->mode & MODE_MIDIOUT) && ep->obuf.used > 0)
                     74:                events |= POLLOUT;
                     75:        return mio_pollfd(p->mio.hdl, pfd, events);
                     76: }
                     77:
                     78: int
                     79: port_mio_revents(void *addr, struct pollfd *pfd)
                     80: {
                     81:        struct port *p = addr;
                     82:
                     83:        return mio_revents(p->mio.hdl, pfd);
                     84: }
                     85:
                     86: void
                     87: port_mio_in(void *arg)
                     88: {
1.2     ! ratchov    89:        unsigned char data[MIDI_BUFSZ];
1.1       ratchov    90:        struct port *p = arg;
                     91:        struct midi *ep = p->midi;
1.2     ! ratchov    92:        int n;
1.1       ratchov    93:
                     94:        for (;;) {
1.2     ! ratchov    95:                n = mio_read(p->mio.hdl, data, MIDI_BUFSZ);
1.1       ratchov    96:                if (n == 0)
                     97:                        break;
1.2     ! ratchov    98:                midi_in(ep, data, n);
1.1       ratchov    99:        }
                    100: }
                    101:
                    102: void
                    103: port_mio_out(void *arg)
                    104: {
                    105:        struct port *p = arg;
                    106:        struct midi *ep = p->midi;
                    107:        unsigned char *data;
                    108:        int n, count;
                    109:
                    110:        for (;;) {
                    111:                data = abuf_rgetblk(&ep->obuf, &count);
                    112:                if (count == 0)
                    113:                        break;
                    114:                n = mio_write(p->mio.hdl, data, count);
                    115:                if (n == 0)
                    116:                        break;
                    117:                abuf_rdiscard(&ep->obuf, n);
                    118:                if (n < count)
                    119:                        break;
                    120:        }
1.2     ! ratchov   121:        midi_fill(ep);
1.1       ratchov   122: }
                    123:
                    124: void
                    125: port_mio_hup(void *arg)
                    126: {
                    127:        struct port *p = arg;
                    128:
                    129:        port_close(p);
                    130: }