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#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "../../include/soundcard.h"
#include <sys/time.h>
#undef DEBUG
extern int __seqfd;
static midi_packet_t midi_packet;
static unsigned char *midibuf = &midi_packet.payload[0];
static int mp = 0;
oss_midi_time_t current_tick = 0;
static int timer_started = 0;
void
OSS_set_timebase (int tb)
{
/* TODO? */
}
#if 1
#define _write write
#else
static size_t
_write (int fildes, void *b, size_t nbyte)
{
midi_packet_header_t *hdr = b;
unsigned char *buf;
int l = nbyte;
buf = (unsigned char *) b + sizeof (*hdr);
if (hdr->magic == MIDI_HDR_MAGIC) /* Timed mode write */
{
l -= sizeof (*hdr);
switch (hdr->event_type)
{
case MIDI_EV_WRITE:
printf ("%9lu: MIDI_EV_WRITE: ", hdr->time);
break;
case MIDI_EV_TEMPO:
printf ("%9lu: MIDI_EV_TEMPO: ", hdr->time);
break;
case MIDI_EV_ECHO:
printf ("%9lu: MIDI_EV_ECHO: ", hdr->time);
break;
case MIDI_EV_START:
printf ("%9lu: MIDI_EV_START: ", hdr->time);
break;
case MIDI_EV_STOP:
printf ("%9lu: MIDI_EV_STOP: ", hdr->time);
break;
default:
printf ("%9lu: MIDI_EV_%d: ", hdr->time, hdr->event_type);
break;
}
if (hdr->options & MIDI_OPT_TIMED)
printf ("TIMED ");
if (l > 0)
{
int i;
printf ("%d bytes (", l);
for (i = 0; i < l; i++)
printf ("%02x ", buf[i]);
printf (")");
}
printf ("\n");
}
return write (fildes, b, nbyte);
}
#endif
static void
start_timer (void)
{
#ifndef DEBUG
midi_packet_header_t hdr;
hdr.magic = MIDI_HDR_MAGIC;
hdr.event_type = MIDI_EV_START;
hdr.options = MIDI_OPT_NONE;
hdr.time = 0;
hdr.parm = 0;
if (_write (__seqfd, &hdr, sizeof (hdr)) != sizeof (hdr))
{
perror ("Write start timer");
exit (-1);
}
timer_started = 1;
printf ("Timer started\n");
#endif
}
void
_dump_midi (void)
{
if (mp > 0)
{
if (!timer_started)
start_timer ();
midi_packet.hdr.magic = MIDI_HDR_MAGIC;
midi_packet.hdr.options = MIDI_OPT_TIMED;
midi_packet.hdr.event_type = MIDI_EV_WRITE;
midi_packet.hdr.parm = 0;
midi_packet.hdr.time = current_tick;
#ifdef DEBUG
if (write (1, &midi_packet.payload[0], mp) == -1)
#else
if (_write (__seqfd, &midi_packet, sizeof (midi_packet_header_t) + mp)
== -1)
#endif
{
perror ("MIDI write");
exit (-1);
}
mp = 0;
}
}
static void
oss_do_timing (unsigned char *ev)
{
unsigned int parm = *(unsigned int *) &ev[4];
midi_packet_header_t hdr;
oss_midi_time_t tick;
_dump_midi ();
switch (ev[1])
{
case TMR_TEMPO:
#ifndef DEBUG
if (!timer_started)
start_timer ();
hdr.magic = MIDI_HDR_MAGIC;
hdr.event_type = MIDI_EV_TEMPO;
hdr.options = MIDI_OPT_TIMED;
hdr.time = current_tick;
hdr.parm = parm;
if (_write (__seqfd, &hdr, sizeof (hdr)) != sizeof (hdr))
{
perror ("Write tempo");
exit (-1);
}
#endif
break;
case TMR_WAIT_REL:
tick = current_tick + parm;
current_tick = tick;
break;
case TMR_WAIT_ABS:
tick = parm;
current_tick = tick;
break;
}
}
static void
out_midi3 (unsigned char a, unsigned char b, unsigned char c)
{
if (mp > 950)
_dump_midi ();
midibuf[mp++] = a;
midibuf[mp++] = b;
midibuf[mp++] = c;
/* printf("Out %02x %02x %02x\n", a, b, c); */
}
static void
out_midi2 (unsigned char a, unsigned char b)
{
if (mp > 950)
_dump_midi ();
midibuf[mp++] = a;
midibuf[mp++] = b;
/* printf("Out %02x %02x\n", a, b); */
}
void
play_event (unsigned char *ev)
{
int i;
switch (ev[0])
{
case EV_TIMING:
oss_do_timing (ev);
return;
break;
case EV_SEQ_LOCAL:
break;
case EV_CHN_COMMON:
switch (ev[2])
{
case MIDI_PGM_CHANGE:
/* printf("PGM change %02x %d\n", ev[2]|ev[3], ev[4]); */
out_midi2 (ev[2] | ev[3], ev[4]);
break;
case MIDI_CHN_PRESSURE:
out_midi2 (ev[2] | ev[3], ev[4]);
break;
case MIDI_CTL_CHANGE:
out_midi3 (ev[2] | ev[3], ev[4], *(short *) &ev[6]);
break;
default:
out_midi3 (ev[2] | ev[3], ev[4], *(short *) &ev[6]);
}
return;
break;
case EV_CHN_VOICE:
out_midi3 (ev[2] | ev[3], ev[4], ev[5]);
return;
break;
case EV_SYSEX:
{
int i, l;
l = 8;
for (i = 2; i < 8; i++)
if (ev[i] == 0xff)
{
l = i;
break;
}
if (mp > 950)
_dump_midi ();
for (i = 2; i < l; i++)
midibuf[mp++] = ev[i];
}
return;
break;
case EV_SYSTEM:
printf ("EV_SYSTEM: ");
break;
default:
printf ("Unknown event %d: ", ev[0]);
}
for (i = 0; i < 8; i++)
printf ("%02x ", ev[i]);
printf ("\n");
}
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