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#define INSTR_FILE "std.o3"
#define DRUMS_FILE "drums.o3"
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include "../../include/soundcard.h"
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
static int instrmap[256] = { -1, 0 };
static int initialized = 0;
static char dir_path[256] = "/etc";
SEQ_USE_EXTBUF ();
static int drumfile = -1, stdfile = -1;
static void
find_ossdir (void)
{
FILE *f;
int i, l;
char line[1024], *p;
if ((f = fopen ("/etc/oss.conf", "r")) == NULL)
{
return;
}
while (fgets (line, 1000, f) != NULL)
{
for (i = 0; i < strlen (line); i++)
if (line[i] == '\n')
line[i] = 0;
p = line;
while (*p && *p != '=')
p++;
if (*p == 0)
continue;
*p++ = 0;
if (*p != '/')
continue;
if (strcmp (line, "OSSLIBDIR") == 0)
{
strcpy (dir_path, p);
fclose (f);
return;
}
}
fclose (f);
}
int
opl3init (int seqfd, int dev)
{
if (!initialized)
{
char fname[256];
find_ossdir ();
sprintf (fname, "%s/etc/%s", dir_path, INSTR_FILE);
if ((stdfile = open (fname, O_RDONLY, 0)) == -1)
{
perror (fname);
}
sprintf (fname, "%s/etc/%s", dir_path, DRUMS_FILE);
if ((drumfile = open (fname, O_RDONLY, 0)) == -1)
{
perror (fname);
}
}
initialized = 1;
#if 0
if (ioctl (seqfd, SNDCTL_SEQ_RESETSAMPLES, &dev) == -1)
{
fprintf (stderr, "OSSlib: Can't reset GM programs. Device %d\n", dev);
perror ("OPL3 init");
exit (-1);
}
#endif
return 0;
}
int
opl3load (int seqfd, int type, int dev, int pgm)
{
int i, n, patfd, print_only = 0;
unsigned char buf[256];
struct sbi_instrument patch;
char *name;
if (!initialized)
opl3init (seqfd, dev);
if (stdfile == -1 || drumfile == -1)
return 0;
if (pgm < 0 || pgm > 255)
return 0;
if (instrmap[pgm] == pgm)
return 0;
instrmap[pgm] = pgm;
patch.key = OPL3_PATCH;
patch.device = dev;
patch.channel = pgm;
if (pgm > 127)
{
name = DRUMS_FILE;
if (lseek (drumfile, (pgm - 128) * 60, SEEK_SET) == -1)
{
perror (DRUMS_FILE);
exit (-1);
}
if (read (drumfile, buf, 60) != 60)
{
perror (DRUMS_FILE);
exit (-1);
}
}
else
{
name = INSTR_FILE;
if (lseek (stdfile, pgm * 60, SEEK_SET) == -1)
{
perror (INSTR_FILE);
exit (-1);
}
if (read (stdfile, buf, 60) != 60)
{
perror (INSTR_FILE);
exit (-1);
}
}
if (strncmp ((char *) buf, "4OP", 3) != 0)
if (strncmp ((char *) buf, "2OP", 3) == 0)
{
patch.key = FM_PATCH;
}
else
{
fprintf (stderr, "OSSlib: Invalid OPL3 patch file %s, instr=%d\n",
name, pgm % 128);
return 0;
}
for (i = 0; i < 22; i++)
patch.operators[i] = buf[i + 36];
SEQ_WRPATCH (&patch, sizeof (patch));
return 0;
}
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