mirror of https://github.com/ericonr/sndio.git
195 lines
3.8 KiB
C
195 lines
3.8 KiB
C
/* $OpenBSD$ */
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/*
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* Copyright (c) 2008-2012 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sndio.h>
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#include "defs.h"
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#include "file.h"
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#include "midi.h"
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#include "miofile.h"
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#include "utils.h"
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int port_mio_pollfd(void *, struct pollfd *);
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int port_mio_revents(void *, struct pollfd *);
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void port_mio_in(void *);
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void port_mio_out(void *);
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void port_mio_hup(void *);
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struct fileops port_mio_ops = {
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"mio",
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port_mio_pollfd,
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port_mio_revents,
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port_mio_in,
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port_mio_out,
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port_mio_hup
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};
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/*
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* open the port using one of the provided paths
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*/
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static struct mio_hdl *
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port_mio_openlist(struct port *c, unsigned int mode)
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{
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struct mio_hdl *hdl;
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struct name *n;
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int idx;
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idx = 0;
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n = c->path_list;
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while (1) {
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if (n == NULL)
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break;
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hdl = mio_open(n->str, mode, 1);
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if (hdl != NULL) {
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if (log_level >= 2) {
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port_log(c);
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log_puts(": using ");
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log_puts(n->str);
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log_puts("\n");
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}
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return hdl;
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}
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n = n->next;
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idx++;
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}
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return NULL;
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}
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int
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port_mio_open(struct port *p)
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{
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p->mio.hdl = port_mio_openlist(p, p->midi->mode);
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if (p->mio.hdl == NULL)
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return 0;
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p->mio.file = file_new(&port_mio_ops, p, "port", mio_nfds(p->mio.hdl));
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return 1;
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}
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/*
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* Open an alternate port. Upon success, close the old port
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* and continue using the new one.
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*/
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int
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port_mio_reopen(struct port *p)
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{
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struct mio_hdl *hdl;
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hdl = port_mio_openlist(p, p->midi->mode);
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if (hdl == NULL) {
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if (log_level >= 1) {
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port_log(p);
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log_puts(": couldn't open an alternate port\n");
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}
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return 0;
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}
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/* close unused device */
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file_del(p->mio.file);
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mio_close(p->mio.hdl);
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p->mio.hdl = hdl;
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p->mio.file = file_new(&port_mio_ops, p, "port", mio_nfds(hdl));
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return 1;
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}
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void
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port_mio_close(struct port *p)
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{
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file_del(p->mio.file);
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mio_close(p->mio.hdl);
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}
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int
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port_mio_pollfd(void *addr, struct pollfd *pfd)
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{
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struct port *p = addr;
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struct midi *ep = p->midi;
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int events = 0;
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if (ep->mode & MODE_MIDIIN)
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events |= POLLIN;
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if ((ep->mode & MODE_MIDIOUT) && ep->obuf.used > 0)
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events |= POLLOUT;
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return mio_pollfd(p->mio.hdl, pfd, events);
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}
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int
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port_mio_revents(void *addr, struct pollfd *pfd)
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{
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struct port *p = addr;
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return mio_revents(p->mio.hdl, pfd);
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}
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void
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port_mio_in(void *arg)
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{
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unsigned char data[MIDI_BUFSZ];
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struct port *p = arg;
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struct midi *ep = p->midi;
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int n;
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for (;;) {
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n = mio_read(p->mio.hdl, data, MIDI_BUFSZ);
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if (n == 0)
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break;
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midi_in(ep, data, n);
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}
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}
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void
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port_mio_out(void *arg)
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{
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struct port *p = arg;
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struct midi *ep = p->midi;
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unsigned char *data;
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int n, count;
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for (;;) {
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data = abuf_rgetblk(&ep->obuf, &count);
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if (count == 0)
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break;
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n = mio_write(p->mio.hdl, data, count);
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if (n == 0)
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break;
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abuf_rdiscard(&ep->obuf, n);
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if (n < count)
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break;
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}
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if (p->state == PORT_DRAIN && ep->obuf.used == 0)
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port_close(p);
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midi_fill(ep);
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}
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void
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port_mio_hup(void *arg)
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{
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struct port *p = arg;
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if (!port_reopen(p)) {
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midi_abort(p->midi);
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if (p->state != PORT_CFG)
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port_close(p);
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}
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}
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