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#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#define OSSLIB
#include "../../include/soundcard.h"
int __seqfd = -1;
static int initialized = 0;
extern void _dump_midi (void); /* From play_event.c */
unsigned char *_seqbuf;
int _seqbuflen = 0;
int _seqbufptr = 0;
int synth_types[64] = { 0 };
#define ST_NONE 0
#define ST_GUS 1
#define ST_OPL 2
int nrsynths = 0;
extern void play_event (unsigned char *ev);
void
seqbuf_dump (void)
{
int l = _seqbufptr;
unsigned char *ev = _seqbuf;
while (l >= 8)
{
play_event (ev);
l -= 8;
ev += 8;
}
_seqbufptr = 0;
_dump_midi ();
}
static int
oss_init_lib (void)
{
if (_seqbuflen < 32 || _seqbuflen > 2048)
_seqbuflen = 2048;
if ((_seqbuf = malloc (_seqbuflen)) == NULL)
return 3;
initialized = 1;
return 0; /* OK */
}
int
OSS_init (int userfd, int buflen)
{
if (_seqbuflen || _seqbuflen || __seqfd != -1 || initialized)
{
fprintf (stderr, "libOSS: OSS_init called too late\n");
return 1;
}
__seqfd = userfd;
if (buflen < 32 || buflen > 2048)
{
fprintf (stderr, "libOSS: OSS_init called with invalid buflen\n");
return 2;
}
_seqbuflen = buflen;
return oss_init_lib ();
}
static void
sanity_check (int fd, unsigned char *buf, int buflen)
{
if (__seqfd != fd)
if (__seqfd == -1)
__seqfd = fd;
else
{
fprintf (stderr, "OSSlib: seqfd is inconsistent\n");
}
if (buf != _seqbuf)
{
fprintf (stderr, "OSSlib: _seqbuf is inconsistent\n");
}
if (buflen != _seqbuflen)
{
fprintf (stderr, "OSSlib: _seqbuf is inconsistent\n");
}
if (!initialized)
if (oss_init_lib () != 0)
{
fprintf (stderr, "OSSlib: Library initialization failed\n");
exit (-1);
}
}
void
OSS_seqbuf_dump (int fd, unsigned char *buf, int buflen)
{
seqbuf_dump ();
}
void
OSS_seq_advbuf (int len, int fd, unsigned char *buf, int buflen)
{
sanity_check (fd, buf, buflen);
_seqbufptr += len;
}
void
OSS_seq_needbuf (int len, int fd, unsigned char *buf, int buflen)
{
sanity_check (fd, buf, buflen);
if ((_seqbufptr + len) > _seqbuflen)
{
seqbuf_dump ();
}
}
void
OSS_patch_caching (int dev, int chn, int patch, int fd, unsigned char *buf,
int buflen)
{
}
void
OSS_drum_caching (int dev, int chn, int patch, int fd, unsigned char *buf,
int buflen)
{
}
void
OSS_write_patch (int fd, unsigned char *buf, int len)
{
sanity_check (fd, _seqbuf, _seqbuflen);
if (write (fd, buf, len) == -1)
{
perror ("OSS_write_patch");
exit (-1);
}
}
int
OSS_write_patch2 (int fd, unsigned char *buf, int len)
{
sanity_check (fd, _seqbuf, _seqbuflen);
return write (fd, buf, len);
}
/*
* audio routines
*/
int
osslib_open (const char *path, int flags, int dummy)
{
return open (path, flags, dummy);
}
void
osslib_close (int fd)
{
close (fd);
}
int
osslib_write (int fd, const void *buf, int count)
{
return write (fd, buf, count);
}
int
osslib_read (int fd, void *buf, int count)
{
return read (fd, buf, count);
}
int
osslib_ioctl (int fd, unsigned int request, void *arg)
{
return ioctl (fd, request, arg);
}
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