seqgen.c
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#include <stdio.h>
#include <stdlib.h>
#include <bstring.h>
#include <assert.h>
#include <getopt.h>
#include <math.h>
static char usage[] = "-verbose <filename>";
main(int argc, char **argv)
{
int ch;
extern char *optarg;
extern int optind;
int errflg=0;
char *sfile;
int verbose;
FILE *seqfile;
int rv;
float qnpt;
long tempo;
/*
* parse the command line arguments
*/
while ((ch = getopt(argc, argv, "v")) != EOF) {
switch (ch) {
case 'v':
verbose = 1;
break;
case '?':
errflg++;
break;
}
}
if (errflg || optind == argc) {
(void)fprintf(stderr, "%s %s\n", argv[0], usage);
exit (2);
}
sfile = argv[optind++];
if (optind != argc) {
fprintf(stderr, "warning: only first file (%s) used, rest ignored\n",
sfile);
}
/*
* load the sequence file
*/
seqfile = fopen(sfile, "w");
if (!seqfile) {
printf("Can't open sequence file\n");
exit(1);
}
/* division */
qnpt = 1.0/(float)120;
rv = fwrite(&qnpt, sizeof(qnpt), 1, seqfile);
assert(rv == 1);
/* tempo */
tempo = 700000;
putc(0, seqfile);
putc(0, seqfile);
putc(0xff, seqfile);
putc(0x51, seqfile);
putc(0x03, seqfile);
putc((tempo >> 16) & 0xff, seqfile);
putc((tempo >> 8) & 0xff, seqfile);
putc((tempo >> 0) & 0xff, seqfile);
/* program change */
putc(0, seqfile);
putc(0, seqfile);
putc(0xc0, seqfile);
putc(0x00, seqfile);
/* midi data */
putc(0, seqfile); /* note 1 on */
putc(0, seqfile);
putc(0x90, seqfile);
putc(55, seqfile);
putc(0x7f, seqfile);
putc(0, seqfile); /* note 1 off */
putc(100, seqfile);
putc(0x90, seqfile);
putc(55, seqfile);
putc(0x0, seqfile);
putc(0, seqfile); /* note 2 on */
putc(20, seqfile);
putc(0x90, seqfile);
putc(57, seqfile);
putc(0x7f, seqfile);
putc(0, seqfile); /* note 2 off */
putc(100, seqfile);
putc(0x90, seqfile);
putc(57, seqfile);
putc(0x0, seqfile);
putc(0, seqfile); /* note 3 on */
putc(20, seqfile);
putc(0x90, seqfile);
putc(53, seqfile);
putc(0x7f, seqfile);
putc(0, seqfile); /* note 3 off */
putc(100, seqfile);
putc(0x90, seqfile);
putc(53, seqfile);
putc(0x0, seqfile);
putc(0, seqfile); /* note 4 on */
putc(20, seqfile);
putc(0x90, seqfile);
putc(41, seqfile);
putc(0x7f, seqfile);
putc(0, seqfile); /* note 4 off */
putc(100, seqfile);
putc(0x90, seqfile);
putc(41, seqfile);
putc(0x0, seqfile);
putc(0, seqfile); /* note 5 on */
putc(20, seqfile);
putc(0x90, seqfile);
putc(48, seqfile);
putc(0x7f, seqfile);
putc(0, seqfile); /* note 5 off */
putc(100, seqfile);
putc(0x90, seqfile);
putc(48, seqfile);
putc(0x0, seqfile);
/* EOF */
putc(0, seqfile);
putc(0, seqfile);
putc(0xff, seqfile);
putc(0x2f, seqfile);
putc(0, seqfile);
fflush(seqfile);
fclose(seqfile);
}