| | Open Sound System |
| Do you have problems with sound/audio application development? Don't panic! Click here for help! |
Copyright (C) 4Front Technologies, 2002-2004. Released under GPLv2/CDDL.
This program was supposed to be a sample program for doing MIDI input with the /dev/music interface. However it has not much use since the /dev/music interface is now obsoleted.
The /dev/midi interface is recommended in the new applications. Please see the "OSS MIDI Programming" section of the OSS Developer's manual.
#include <soundcard.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
void
decode_event (unsigned char *ev)
{
int i;
for (i = 0; i < 8; i++)
{
printf ("%02x ", ev[i]);
}
printf (": ");
switch (ev[0])
{
case EV_CHN_VOICE:
printf ("EV_CHN_VOICE(%d)\t| ", ev[1]);
switch (ev[2])
{
case MIDI_NOTEON:
printf ("Note On ch%d note%d vel%d", ev[3], ev[4], ev[5]);
break;
case MIDI_NOTEOFF:
printf ("Note Off ch%d note%d vel%d", ev[3], ev[4], ev[5]);
break;
case MIDI_KEY_PRESSURE:
printf ("KPressure ch%d note%d vel%d", ev[3], ev[4], ev[5]);
break;
default:
printf ("*** Unknown ***");
}
break;
case EV_CHN_COMMON:
printf ("EV_CHN_COMMON\tdev%d\t| ", ev[1]);
switch (ev[2])
{
case MIDI_CHN_PRESSURE:
printf ("MIDI_CHN_PRESSURE ch%d %d", ev[3], ev[4]);
break;
case MIDI_PGM_CHANGE:
printf ("MIDI_PGM_CHANGE ch%d %d", ev[3], ev[4]);
break;
case MIDI_CTL_CHANGE:
printf ("MIDI_CTL_CHANGE ch%d %d,%d", ev[3], ev[4],
*(short *) &ev[6]);
break;
case MIDI_PITCH_BEND:
printf ("MIDI_CTL_CHANGE ch%d %d", ev[3], *(short *) &ev[6]);
break;
default:
printf ("*** Unknown ***");
}
break;
case EV_SYSEX:
printf ("EV_SYSEX\tdev%d: ", ev[1]);
for (i = 2; i < 8; i++)
printf ("%02x ", ev[i]);
break;
case EV_TIMING:
printf ("EV_TIMING\t\t| ");
switch (ev[1])
{
case TMR_START:
printf ("TMR_START\t");
break;
case TMR_STOP:
printf ("TMR_STOP\t");
break;
case TMR_CONTINUE:
printf ("TMR_CONTINUE\t");
break;
case TMR_WAIT_ABS:
printf ("TMR_WAIT_ABS\t%10u", *(unsigned int *) &ev[4]);
break;
case TMR_WAIT_REL:
printf ("TMR_WAIT_REL\t%10u", *(unsigned int *) &ev[4]);
break;
case TMR_ECHO:
printf ("TMR_ECHO\t%10u", *(unsigned int *) &ev[4]);
break;
case TMR_TEMPO:
printf ("TMR_TEMPO\t%10u", *(unsigned int *) &ev[4]);
break;
case TMR_SPP:
printf ("TMR_SPP\t%10u", *(unsigned int *) &ev[4]);
break;
case TMR_TIMESIG:
printf ("TMR_TIMESIG\t%10u", *(unsigned int *) &ev[4]);
break;
}
break;
case EV_SEQ_LOCAL:
printf ("EV_SEQ_LOCAL\t*** Should not happen ***");
break;
case EV_SYSTEM:
printf ("EV_SYSTEM(%d)\t\t| ", ev[1]);
switch (ev[2])
{
case 0xf0:
printf ("SysEx *** Should not happen ***");
break;
case 0xf1:
printf ("MTC Qframe %02x", ev[3]);
break;
case 0xf2:
printf ("Songpos ptr %02x,%02x", ev[3], ev[4]);
break;
case 0xf3:
printf ("Song select %02x", ev[3]);
break;
case 0xf4:
case 0xf5:
printf ("*** Undefined ***");
break;
case 0xf6:
printf ("Tune request");
break;
case 0xf7:
printf ("EOX");
break;
case 0xf8:
printf ("Timing clock");
break;
case 0xf9:
printf ("** Undefined ***");
break;
case 0xfa:
printf ("Start");
break;
case 0xfb:
printf ("Continue");
break;
case 0xfc:
printf ("Stop");
break;
case 0xfd:
printf ("** Undefined ***");
break;
case 0xfe:
printf ("Active sensing");
break;
case 0xff:
printf ("SYSTEM RESET");
break;
}
break;
default:
printf ("*** Unknown event type ***");
}
printf ("\n");
}
int
main (int argc, int *argv[])
{
int fd, l, i;
unsigned char buf[4096];
if ((fd = open ("/dev/music", O_RDONLY, 0)) == -1)
{
perror ("/dev/music");
exit (-1);
}
if (ioctl (fd, SNDCTL_SEQ_ACTSENSE_ENABLE, 0) == -1)
{
perror ("/dev/music ACTSENSE_ENABLE");
exit (-1);
}
if (ioctl (fd, SNDCTL_SEQ_TIMING_ENABLE, 0) == -1)
{
perror ("/dev/music TIMING_ENABLE");
exit (-1);
}
if (ioctl (fd, SNDCTL_SEQ_RT_ENABLE, 0) == -1)
{
perror ("/dev/music RT_ENABLE");
exit (-1);
}
while ((l = read (fd, buf, sizeof (buf))) != -1)
{
for (i = 0; i < l; i += 8)
{
decode_event (&buf[i]);
}
}
}