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#define SEQUENCER_DEV "/dev/sequencer2"
#include <linux/soundcard.h>
#include <linux/awe_voice.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <assert.h>
int devnum = 0;
int seqfd = -1;
SEQ_DEFINEBUF(2048);
void seqbuf_dump()
{
assert(seqfd != -1);
if (_seqbufptr)
if (write (seqfd, _seqbuf, _seqbufptr) == -1)
perror("solfege_c_midi.seqbuf_dump.Can't write to MIDI device");
_seqbufptr = 0;
}
void seq_reset() {
ioctl(seqfd, SNDCTL_SEQ_RESET);
seqbuf_dump();
}
void initialize_sound() {
if ((seqfd = open(SEQUENCER_DEV, O_WRONLY, 0)) < 0) {
perror("open" SEQUENCER_DEV);
exit(-1);
}
}
void close_sound() {
close(seqfd);
}
/*
* This sounds like this om my linux 2.4.0 with sb pnp32 soundcard
* 1. The first tone starts.
* 2. The second tone starts.
* 3. The second tone stops.
* 4. The first tone last forever (that is until we close the device)
*
* If I use chn 0 on the first and chn 1 on the second note, it works
* ok. The OSS Programming guide (4front) don't say anywhere that I must
* use chn 0 before chn 1. What am I missing??
*/
void test1() {
seq_reset();
SEQ_START_TIMER();
SEQ_SET_PATCH(devnum, 0, 58);
SEQ_SET_PATCH(devnum, 1, 60);
SEQ_START_NOTE(devnum, 1, 50, 100);
SEQ_DELTA_TIME(60);
SEQ_STOP_NOTE(devnum, 1, 50, 100);
SEQ_START_NOTE(devnum, 0, 51, 100);
SEQ_DELTA_TIME(60);
SEQ_STOP_NOTE(devnum, 0, 51, 100);
SEQ_STOP_TIMER();
SEQ_DUMPBUF();
}
/*
* The 31 first notes are stopped as they should, but after that, the
* notes are not stopped by the SEQ_STOP_NOTE macro
**/
void test2() {
int i;
seq_reset();
SEQ_START_TIMER();
SEQ_SET_PATCH(devnum, 0, 58);
SEQ_SET_PATCH(devnum, 1, 66);
for (i = 30; i < 63 ; i = i + 2) {
SEQ_START_NOTE(devnum, 0, i, 100);
SEQ_DELTA_TIME(20);
SEQ_STOP_NOTE(devnum, 0, i, 100);
SEQ_START_NOTE(devnum, 1, i + 1, 100);
SEQ_DELTA_TIME(20);
SEQ_STOP_NOTE(devnum, 1, i + 1, 100);
}
SEQ_DUMPBUF();
}
void test3() {
seq_reset();
SEQ_START_TIMER();
SEQ_SET_PATCH(devnum, 0, 58);
SEQ_SET_PATCH(devnum, 1, 60);
SEQ_START_NOTE(devnum, 0, 50, 100);
SEQ_DELTA_TIME(60);
SEQ_STOP_NOTE(devnum, 0, 50, 100);
SEQ_START_NOTE(devnum, 0, 51, 100);
SEQ_START_NOTE(devnum, 1, 51, 100);
SEQ_DELTA_TIME(60);
SEQ_STOP_NOTE(devnum, 0, 51, 100);
SEQ_STOP_NOTE(devnum, 1, 51, 100);
SEQ_STOP_TIMER();
SEQ_DUMPBUF();
}
int main() {
initialize_sound();
test3();
sleep(3);
close_sound();
}
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