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Diffstat (limited to 'src/sys/oss/midi-oss.c')
-rw-r--r--src/sys/oss/midi-oss.c177
1 files changed, 177 insertions, 0 deletions
diff --git a/src/sys/oss/midi-oss.c b/src/sys/oss/midi-oss.c
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+++ b/src/sys/oss/midi-oss.c
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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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