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/*
* Schism Tracker - a cross-platform Impulse Tracker clone
* copyright (c) 2003-2005 Storlek <storlek@rigelseven.com>
* copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org>
* copyright (c) 2009 Storlek & Mrs. Brisby
* copyright (c) 2010-2012 Storlek
* URL: http://schismtracker.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "headers.h"
#include "midi.h"
#include "util.h"
#ifdef USE_OSS
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <sys/poll.h>
#include <errno.h>
#include <fcntl.h>
/* this is stupid; oss doesn't have a concept of ports... */
#define MAX_OSS_MIDI 64
#define MAX_MIDI_PORTS MAX_OSS_MIDI+2
static int opened[MAX_MIDI_PORTS];
static void _oss_send(struct midi_port *p, const unsigned char *data, unsigned int len,
UNUSED unsigned int delay)
{
int fd, r, n;
fd = opened[ n = INT_SHAPED_PTR(p->userdata) ];
if (fd < 0) return;
while (len > 0) {
r = write(fd, data, len);
if (r < -1 && errno == EINTR) continue;
if (r < 1) {
/* err, can't happen? */
(void)close(opened[n]);
opened[n] = -1;
p->userdata = PTR_SHAPED_INT(-1);
p->io = 0; /* failure! */
return;
}
data += r;
len -= r;
}
}
static int _oss_start(UNUSED struct midi_port *p) { return 1; /* do nothing */ }
static int _oss_stop(UNUSED struct midi_port *p) { return 1; /* do nothing */ }
static int _oss_thread(struct midi_provider *p)
{
struct pollfd pfd[MAX_MIDI_PORTS];
struct midi_port *ptr, *src;
unsigned char midi_buf[4096];
int i, j, r;
for (;;) {
ptr = NULL;
j = 0;
while (midi_port_foreach(p, &ptr)) {
i = INT_SHAPED_PTR(ptr->userdata);
if (i == -1) continue; /* err... */
if (!(ptr->io & MIDI_INPUT)) continue;
pfd[j].fd = i;
pfd[j].events = POLLIN;
pfd[j].revents = 0; /* RH 5 bug */
j++;
}
if (!j || poll(pfd, j, -1) < 1) {
sleep(1);
continue;
}
for (i = 0; i < j; i++) {
if (!(pfd[i].revents & POLLIN)) continue;
do {
r = read(pfd[i].fd, midi_buf, sizeof(midi_buf));
} while (r == -1 && errno == EINTR);
if (r > 0) {
ptr = src = NULL;
while (midi_port_foreach(p, &ptr)) {
if (INT_SHAPED_PTR(ptr->userdata) == pfd[i].fd) {
src = ptr;
}
}
midi_received_cb(src, midi_buf, r);
}
}
}
/* stupid gcc */
return 0;
}
static void _tryopen(int n, const char *name, struct midi_provider *_oss_provider)
{
int io;
char *ptr;
if (opened[n+1] != -1) return;
opened[n+1] = open(name, O_RDWR|O_NOCTTY|O_NONBLOCK);
if (opened[n+1] == -1) {
opened[n+1] = open(name, O_RDONLY|O_NOCTTY|O_NONBLOCK);
if (opened[n+1] == -1) {
opened[n+1] = open(name, O_WRONLY|O_NOCTTY|O_NONBLOCK);
if (opened[n+1] == -1) return;
io = MIDI_OUTPUT;
} else {
io = MIDI_INPUT;
}
} else {
io = MIDI_INPUT | MIDI_OUTPUT;
}
ptr = NULL;
if (asprintf(&ptr, " %-16s (OSS)", name) == -1) {
return;
}
midi_port_register(_oss_provider, io, ptr, PTR_SHAPED_INT((long)n+1), 0);
free(ptr);
}
static void _oss_poll(struct midi_provider *_oss_provider)
{
char sbuf[64];
int i;
_tryopen(-1, "/dev/midi", _oss_provider);
for (i = 0; i < MAX_OSS_MIDI; i++) {
sprintf(sbuf, "/dev/midi%d", i);
_tryopen(i, sbuf, _oss_provider);
sprintf(sbuf, "/dev/midi%02d", i);
_tryopen(i, sbuf, _oss_provider);
}
}
int oss_midi_setup(void)
{
static struct midi_driver driver;
int i;
driver.flags = 0;
driver.poll = _oss_poll;
driver.thread = _oss_thread;
driver.enable = _oss_start;
driver.disable = _oss_stop;
driver.send = _oss_send;
for (i = 0; i < MAX_MIDI_PORTS; i++) opened[i] = -1;
if (!midi_provider_register("OSS", &driver)) return 0;
return 1;
}
#endif
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