Hi,
i've just written a midiout driver that uses irix's libmd. the new
midiout_sgimd.c and a trivial patch to midiout.c is attached. I don't know
autoconf/automake very well, so could someone please construct a test
for dmedia/midi.h and libmd.so?
I currenty use #ifdef HAVE_DMEDIA_MIDI_H to check if the driver should
be used. In that case "-lmd" needs to be linked to freesci.
The driver works, but the timing is a bit off. Additionaly, to get "normal"
devices to work behind the 38400bps link to my sc-55, one needs to set
midiout.sgimd.sleeptime=50000
in the freesci config file, otherwise some bytes may get lost, and my
mt32 complains about sysex checksum errors.
I'll try a software synthesizer later to see if it has the same problems.
Rainer
-- Attached file included as plaintext by Listar --
-- File: midiout_sgimd.c
-- Desc: midiout_sgimd.c
/***************************************************************************
midiout_sgimd.c Copyright (C) 02 Rainer Canavan
This program may be modified and copied freely according to the terms of
the GNU general public license (GPL), as long as the above copyright
notice and the licensing information contained herein are preserved.
Please refer to www.gnu.org for licensing details.
This work is provided AS IS, without warranty of any kind, expressed or
implied, including but not limited to the warranties of merchantibility,
noninfringement, and fitness for a specific purpose. The author will not
be held liable for any damage caused by this work or derivatives of it.
By using this source code, you agree to the licensing terms as stated
above.
***************************************************************************/
#ifdef HAVE_DMEDIA_MIDI_H
#include <midiout.h>
#include <dmedia/midi.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <bstring.h>
#include <sys/time.h>
#undef DEBUG_OUTPUT
static int numinterfaces;
static MDport midiport;
static int fd;
static fd_set fdset;
static char *port = NULL;
static int sleeptime = 0;
static int
midiout_sgimd_set_parameter(struct _midiout_driver *drv, char *attribute, char *value)
{
if (!strcasecmp(attribute, "port")) {
port = value;
#ifdef DEBUG_OUTPUT
fprintf(stderr,"MIDI: configured device: %s\n",port);
#endif
} else if (!strcasecmp(attribute, "usleep")) {
sleeptime = value;
#ifdef DEBUG_OUTPUT
fprintf(stderr,"MIDI: sleep %i usecs to flush.\n",sleeptime);
#endif
} else
sciprintf("Unknown sgimd option '%s'!\n", attribute);
return 0;
}
int midiout_sgimd_open()
{
int i;
numinterfaces=mdInit();
if (numinterfaces<=0) {
fprintf(stderr,"No MIDI interfaces configured.\n");
perror("Cannot initialize libmd for sound output");
return -1;
}
for (i=0; i<numinterfaces; i++) {
fprintf(stderr,"MIDI interface %i: %s\n", i, mdGetName(i));
}
midiport = mdOpenOutPort(port);
if (!midiport) {
fprintf(stderr,"Unable to open MIDI interfaces %s.\n", port);
perror("Cannot open sound output.");
return -1;
}
fd = mdGetFd(midiport);
if (!fd) {
fprintf(stderr,"While trying to open '%s':\n", port);
perror("Failed to open for sound output");
mdClosePort(midiport);
return -1;
}
mdSetStampMode(midiport, MD_NOSTAMP); /* don't use Timestamps */
return 0;
}
int midiout_sgimd_close()
{
mdClosePort(midiport);
return 0;
}
int midiout_sgimd_flush()
{
GTimeVal timeout = {1, 1};
FD_ZERO(&fdset);
FD_SET(fd,&fdset);
#ifdef DEBUG_OUTPUT
fprintf(stderr,"select (fd=%i)...",fd);
#endif
select(fd+1, NULL, &fdset, NULL, (struct timeval *)&timeout);
/* _I_ have to make it sleep a bit. My MIDI interface is
faster than the MIDI device, so SYSEX msgs may get lost... */
usleep(50000);
#ifdef DEBUG_OUTPUT
fprintf(stderr," done.\n");
#endif
return 0;
}
int midiout_sgimd_write(guint8 *buffer, unsigned int count)
{
MDevent event;
int i;
event.stamp=1;
event.msglen=count;
if (buffer[0]==MD_SYSEX) { /* SYSEX */
event.sysexmsg=buffer;
event.msg[0]=MD_SYSEX;
if (buffer[count-1]!=MD_EOX) {
fprintf(stderr,"broken SYSEX MIDI Event of length %u\n",count);
return 1;
}
#ifdef DEBUG_OUTPUT
fprintf(stderr,"sending SYSEX...");
#endif
} else {
event.sysexmsg=NULL;
if (count>4) {
fprintf(stderr,"broken non-SYSEX MIDI Event of length
%u\n",count);
} else {
for (i=0; i<count; i++) event.msg[i]=buffer[i];
}
#ifdef DEBUG_OUTPUT
fprintf(stderr,"sending MIDI event...");
#endif
}
if (mdSend(midiport, &event, 1)!=1) {
fprintf(stderr,"failed sending MIDI event (dump follows...)\n");
fprintf(stderr,"MIDI Event (len=%u):",count);
for (i=0; i<count; i++) fprintf(stderr,"%02x ",(int)buffer[i]);
fprintf(stderr,"\n");
}
#ifdef DEBUG_OUTPUT
fprintf(stderr," done.\n");
#endif
}
midiout_driver_t midiout_driver_sgimd = {
"sgimd",
"v0.1",
&midiout_sgimd_set_parameter,
&midiout_sgimd_open,
&midiout_sgimd_close,
&midiout_sgimd_write,
&midiout_sgimd_flush
};
#endif /* HAVE_DMEDIA_MIDI_H */
-- Attached file included as plaintext by Listar --
-- File: midiout.c-patch
-- Desc: midiout.c-patch
--- /usr/people/canavan/src/clean/freesci-0.3.3/src/sound/midiout.c Fri Jan 4
15:54:55 2002
+++ midiout.c Thu Mar 7 21:40:33 2002
@@ -33,6 +33,9 @@
#ifdef HAVE_ALSA
&midiout_driver_alsaraw,
#endif
+#ifdef HAVE_DMEDIA_MIDI_H
+ &midiout_driver_sgimd,
+#endif
#ifdef _WIN32
&midiout_driver_win32mci,
#endif
