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MIDIFORM.C
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//ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
//ÛÛ ÛÛ
//ÛÛ MIDIFORM.C ÛÛ
//ÛÛ ÛÛ
//ÛÛ Extended MIDI (XMIDI) file conversion utility ÛÛ
//ÛÛ ÛÛ
//ÛÛ V1.00 of 15-Sep-91 ÛÛ
//ÛÛ V1.01 of 27-Nov-91: MAX_EVLEN increased to 384 ÛÛ
//ÛÛ V1.02 of 7-Feb-92: Input line comments allowed ÛÛ
//ÛÛ Quant math precision increased ÛÛ
//ÛÛ ÛÛ
//ÛÛ Project: IBM Audio Interface Library ÛÛ
//ÛÛ Author: John Miles ÛÛ
//ÛÛ ÛÛ
//ÛÛ C source compatible with Turbo C++ v1.0 or later ÛÛ
//ÛÛ ÛÛ
//ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
//ÛÛ ÛÛ
//ÛÛ midiform.obj: midiform.c gen.h ÛÛ
//ÛÛ bcc -ml -c -v midiform.c ÛÛ
//ÛÛ ÛÛ
//ÛÛ midiform.exe: midiform.obj gen.lib ÛÛ
//ÛÛ tlink @midiform.lls ÛÛ
//ÛÛ ÛÛ
//ÛÛ Contents of MIDIFORM.LLS: ÛÛ
//ÛÛ /c /v /x + ÛÛ
//ÛÛ \bc\lib\c0l.obj + ÛÛ
//ÛÛ midiform, + ÛÛ
//ÛÛ midiform.exe, + ÛÛ
//ÛÛ midiform.map, + ÛÛ
//ÛÛ \bc\lib\cl.lib gen.lib ÛÛ
//ÛÛ ÛÛ
//ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
//ÛÛ ÛÛ
//ÛÛ Copyright (C) 1991, 1992 Miles Design, Inc. ÛÛ
//ÛÛ ÛÛ
//ÛÛ Miles Design, Inc. ÛÛ
//ÛÛ 10926 Jollyville #308 ÛÛ
//ÛÛ Austin, TX 78759 ÛÛ
//ÛÛ (512) 345-2642 / FAX (512) 338-9630 / BBS (512) 454-9990 ÛÛ
//ÛÛ ÛÛ
//ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <alloc.h>
#include <string.h>
#include <io.h>
#include <conio.h>
#include <ctype.h>
#include "gen.h" // General DOS and system functions
const char VERSION[] = "1.02";
#define DEFAULT_QUAN 120 // Default quantization rate in hertz
#define MAX_TRKS 64 // Max. # of tracks in MIDI input file
#define MAX_EVLEN 384 // Max. length of MIDI event in bytes
#define MAX_TIMB 16384 // Max. # of timbre requests in MIDI file
#define MAX_RBRN 128 // Max. # of unique branch targets in MIDI file
#define MAX_NOTES 32 // Max. # of notes simultaneously "on" in MIDI file
#define CHAN_CNT 16 // # of MIDI channels
#define AIL_BRANCH_PT 120 // AIL MIDI controller for branch points
#define AIL_TIMB_BNK 114 // AIL MIDI controller: Timbre Bank Select
#define EV_NOTE_OFF 0x80 // Standard MIDI file event types
#define EV_NOTE_ON 0x90
#define EV_POLY_PRESS 0xa0
#define EV_CONTROL 0xb0
#define EV_PROGRAM 0xc0
#define EV_CHAN_PRESS 0xd0
#define EV_PITCH 0xe0
#define EV_SYSEX 0xf0
#define EV_ESC 0xf7
#define EV_META 0xff
#define EV_INVALID 0x00
#define META_EOT 0x2f // Standard MIDI meta-event types
#define META_TRK_NAME 0x03
#define META_INS_NAME 0x04
#define META_TEMPO 0x51
#define MAX_ULONG 4294967295L
typedef struct
{
unsigned bnum;
unsigned long offset;
}
RBRN_entry;
typedef struct
{
unsigned char t_num;
unsigned char t_bank;
}
TIMB_entry;
typedef struct
{
unsigned quantization;
}
AILH_block;
typedef struct
{
unsigned cnt;
RBRN_entry brn[MAX_RBRN];
}
RBRN_block;
typedef struct
{
unsigned cnt;
TIMB_entry tbr[MAX_TIMB];
}
TIMB_block;
typedef struct
{
unsigned long len;
unsigned long avail;
unsigned char far *name;
unsigned char far *base;
unsigned char far *ptr;
}
IFF_block;
typedef struct
{
unsigned char far *seq_fn;
unsigned char far *base;
unsigned long seq_len;
unsigned format;
unsigned ntrks;
unsigned division;
unsigned long tick_time;
unsigned char event[MAX_EVLEN];
unsigned long event_len;
unsigned long event_time;
unsigned event_chan;
unsigned event_trk;
unsigned char far *trk_ptr[MAX_TRKS];
unsigned char status[MAX_TRKS];
unsigned char trk_active[MAX_TRKS];
unsigned long pending_delta[MAX_TRKS];
}
MIDI;
typedef struct
{
unsigned long q_int;
unsigned long DDA_sum;
unsigned long interval;
unsigned long delta;
unsigned char note_chan[MAX_NOTES];
unsigned char note_num[MAX_NOTES];
unsigned long note_intvl[MAX_NOTES];
unsigned char far *note_next[MAX_NOTES];
unsigned char timb_BNK[CHAN_CNT];
unsigned rbs_BNK[CHAN_CNT];
AILH_block AILH;
RBRN_block RBRN;
TIMB_block TIMB;
IFF_block EVNT;
}
XMIDI;
char *tmp_fn = "MFXXXXXX";
char out_fn[128];
union REGS inregs,outregs;
/************************************************************/
void abend(int err, unsigned long info_1, unsigned long info_2)
{
if (!err) return;
fprintf(stderr,"Error MF%03u: ",err);
switch (err)
{
case 1:
switch (info_1)
{
case 1:
fprintf(stderr,"I/O fault"); break;
case 2:
fprintf(stderr,"Insufficient free memory"); break;
case 3:
fprintf(stderr,"File \"%s\" not found",info_2); break;
case 4:
fprintf(stderr,"Can't write to file \"%s\"",info_2); break;
case 5:
fprintf(stderr,"Can't read from file \"%s\"",info_2); break;
case 6:
fprintf(stderr,"Disk full"); break;
default:
fprintf(stderr,"Undefined disk error"); break;
}
break;
case 2:
fprintf(stderr,"File \"%s\" not a standard MIDI file",info_1); break;
case 3:
fprintf(stderr,"MIDI event > %u bytes long in file \"%s\"",
MAX_EVLEN,info_1);
break;
case 4:
fprintf(stderr,"Illegal MIDI status byte in file \"%s\"",info_1);
break;
case 5:
fprintf(stderr,"Illegal MIDI event in file \"%s\"",info_1); break;
case 6:
fprintf(stderr,"> %u tracks in MIDI file \"%s\"",MAX_TRKS,info_1);
break;
case 7:
fprintf(stderr,"Insufficient memory to convert \"%s\"",info_1);
break;
case 8:
fprintf(stderr,"Unpaired MIDI note-on event in file \"%s\"",
info_1);
break;
case 9:
fprintf(stderr,"> %u simultaneous notes in file \"%s\"",
MAX_NOTES,info_1);
break;
case 10:
fprintf(stderr,"> %u branch point controllers in file \"%s\"",
MAX_RBRN,info_1);
break;
case 11:
fprintf(stderr,"> %u timbre request controller pairs in file \"%s\"",
MAX_TIMB,info_1);
break;
case 12:
fprintf(stderr,"Duplicate branch point controller in ");
fprintf(stderr,"file \"%s\"",info_1);
break;
}
fprintf(stderr,"\n");
fcloseall();
if (strlen(tmp_fn)) unlink(tmp_fn);
if (strlen(out_fn)) unlink(out_fn);
exit(err);
}
/***************************************************************/
void locate(int x, int y)
{
inregs.h.ah = 0x0f;
int86(0x10,&inregs,&outregs);
inregs.h.ah = 0x02;
inregs.h.dh = y; inregs.h.dl = x; inregs.h.bh = outregs.h.bh;
int86(0x10,&inregs,&outregs);
}
int curpos_x(void)
{
inregs.h.ah = 0x0f;
int86(0x10,&inregs,&outregs);
inregs.h.bh = outregs.h.bh; inregs.h.ah = 0x03;
int86(0x10,&inregs,&outregs);
return outregs.h.dl;
}
int curpos_y(void)
{
inregs.h.ah = 0x0f;
int86(0x10,&inregs,&outregs);
inregs.h.bh = outregs.h.bh; inregs.h.ah = 0x03;
int86(0x10,&inregs,&outregs);
return outregs.h.dh;
}
/***************************************************************/
FILE *IFF_create_file(char *filename)
{
static FILE *out;
out = fopen(filename,"w+b");
return out;
}
/***************************************************************/
int IFF_append_CAT(FILE *out, char *CAT_type)
{
static unsigned long len = 0L;
fputs("CAT ",out);
fwrite(&len,4,1,out);
fputs(CAT_type,out);
fflush(out);
return (!ferror(out));
}
/***************************************************************/
void IFF_close_CAT(FILE *out, unsigned long len_off)
{
static unsigned long len;
fflush(out);
len = wswap(ftell(out)-len_off+4L);
fseek(out,len_off-8L,SEEK_SET);
fwrite(&len,4,1,out);
}
/***************************************************************/
void IFF_close_file(FILE *out)
{
fclose(out);
}
/***************************************************************/
unsigned IFF_construct(IFF_block *BLK)
{
BLK->ptr = norm(BLK->base);
BLK->len = 0L;
return 0L;
}
/***************************************************************/
int IFF_write_block(FILE *out, IFF_block *BLK)
{
unsigned long len,blen;
unsigned char far *ptr;
ptr = BLK->base;
len = BLK->len;
blen = wswap(len + (len & 1L));
fputs(BLK->name,out);
fwrite(&blen,4,1,out);
blen = len;
while (len--)
{
fputc(*ptr,out);
ptr = add_ptr(ptr,1L);
}
if (blen & 1L) fputc(0,out);
return (!ferror(out));
}
/***************************************************************/
int IFF_append_FORM(FILE *out, char *FORM_type, FILE *in)
{
static char buff[512];
unsigned long len,blen;
fseek(in,0L,SEEK_SET);
fflush(in);
len = filelength(fileno(in));
blen = wswap(len + (len & 1L) + 4L);
fputs("FORM",out);
fwrite(&blen,4,1,out);
fputs(FORM_type,out);
blen = len;
while (len > 512L)
{
fread(buff,512,1,in);
fwrite(buff,512,1,out);
len -= 512L;
}
fread(buff,len,1,in);
fwrite(buff,len,1,out);
if (blen & 1L) fputc(0,out);
return (!ferror(out));
}
/***************************************************************/
void IFF_put_byte(unsigned val, IFF_block *BLK)
{
*BLK->ptr = (unsigned char) val;
BLK->ptr = add_ptr(BLK->ptr,1L);
BLK->len++;
}
/***************************************************************/
void IFF_put_vln(unsigned long val, IFF_block *BLK)
{
unsigned i,n,cnt;
unsigned char bytefield[4];
bytefield[3] = (val & 0x7fL);
bytefield[2] = ((val >> 7) & 0x7fL) | 0x80;
bytefield[1] = ((val >> 14) & 0x7fL) | 0x80;
bytefield[0] = ((val >> 21) & 0x7fL) | 0x80;
n=3;
for (i=0;i<=3;i++)
if (bytefield[i] & 0x7f)
{
n=i;
break;
}
for (i=n;i<=3;i++)
{
*BLK->ptr = bytefield[i];
BLK->ptr = add_ptr(BLK->ptr,1L);
BLK->len++;
}
}
/***************************************************************/
unsigned MIDI_get_chr(MIDI *MIDI, unsigned trk)
{
unsigned val;
unsigned char far *ptr = MIDI->trk_ptr[trk];
val = (unsigned) *ptr;
ptr = add_ptr(ptr,1L);
MIDI->trk_ptr[trk] = ptr;
return val;
}
unsigned MIDI_next_chr(MIDI *MIDI, unsigned trk)
{
unsigned val;
val = (unsigned) *MIDI->trk_ptr[trk];
return val;
}
unsigned long MIDI_get_vln(MIDI *MIDI, unsigned trk)
{
unsigned long val=0L;
unsigned i,cnt=4;
do
{
i = MIDI_get_chr(MIDI,trk);
val = (val << 7) | (unsigned long) (i & 0x7f);
if (!(i & 0x80))
cnt = 0;
else
--cnt;
}
while (cnt);
return val;
}
unsigned MIDI_vln_size(unsigned long val)
{
unsigned cnt=0;
do
{
cnt++;
val >>= 7;
}
while (val);
return cnt;
}
unsigned MIDI_put_vln(unsigned long val, unsigned char far *ptr)
{
unsigned i,n,cnt;
unsigned char bytefield[4];
bytefield[3] = (val & 0x7fL);
bytefield[2] = ((val >> 7) & 0x7fL) | 0x80;
bytefield[1] = ((val >> 14) & 0x7fL) | 0x80;
bytefield[0] = ((val >> 21) & 0x7fL) | 0x80;
n=3;
for (i=0;i<=3;i++)
if (bytefield[i] & 0x7f)
{
n=i;
break;
}
cnt=0;
for (i=n;i<=3;i++)
{
*ptr = bytefield[i];
ptr = add_ptr(ptr,1L);
++cnt;
}
return cnt;
}
unsigned long MIDI_get_32(MIDI *MIDI, unsigned trk)
{
unsigned long val;
val = (unsigned long) MIDI_get_chr(MIDI,trk);
val = (val << 8) | (unsigned long) MIDI_get_chr(MIDI,trk);
val = (val << 8) | (unsigned long) MIDI_get_chr(MIDI,trk);
val = (val << 8) | (unsigned long) MIDI_get_chr(MIDI,trk);
return val;
}
unsigned long MIDI_get_24(MIDI *MIDI, unsigned trk)
{
unsigned long val;
val = (unsigned long) MIDI_get_chr(MIDI,trk);
val = (val << 8) | (unsigned long) MIDI_get_chr(MIDI,trk);
val = (val << 8) | (unsigned long) MIDI_get_chr(MIDI,trk);
return val;
}
unsigned MIDI_get_16(MIDI *MIDI, unsigned trk)
{
unsigned val;
val = MIDI_get_chr(MIDI,trk);
val = (val << 8) | MIDI_get_chr(MIDI,trk);
return val;
}
/***************************************************************/
unsigned MIDI_construct(MIDI far *MIDI)
{
unsigned long chunk_len;
unsigned trk,bad;
unsigned char far *src;
unsigned long len;
src = norm(MIDI->base);
len = MIDI->seq_len;
bad=1;
while (len-- >= 4L)
{
if (!strnicmp(src,"MThd",4))
{
bad=0;
break;
}
src = add_ptr(src,1L);
};
if (bad) return 2;
chunk_len = wswap(*(unsigned long far *) (src+4));
MIDI->ntrks = bswap(*(unsigned far *) (src+10));
if (MIDI->ntrks > MAX_TRKS) return 6;
MIDI->format = bswap(*(unsigned far *) (src+8));
MIDI->division = bswap(*(unsigned far *) (src+12));
MIDI->tick_time = (50000000L) / (unsigned long) MIDI->division;
MIDI->event_time = 0L;
MIDI->event_trk = MIDI->ntrks - 1;
src = add_ptr(src,chunk_len+8L);
trk = 0;
do
{
chunk_len = wswap(*(unsigned long far *) (src+4));
if (!strnicmp(src,"MTrk",4))
{
MIDI->trk_ptr[trk] = add_ptr(src,8L);
MIDI->status[trk] = 0;
MIDI->trk_active[trk] = 1;
MIDI->pending_delta[trk] = MIDI_get_vln(MIDI,trk);
trk++;
}
src = add_ptr(src,chunk_len+8L);
}
while (trk < MIDI->ntrks);
return 0;
}
void MIDI_destroy(MIDI far *MIDI)
{
farfree(MIDI->base);
}
/***************************************************************/
unsigned MIDI_event_type(MIDI far *MIDI)
{
switch (MIDI->event[0] & 0xf0)
{
case EV_NOTE_OFF:
return EV_NOTE_OFF;
case EV_NOTE_ON:
return (MIDI->event[2]) ? EV_NOTE_ON : EV_NOTE_OFF;
case EV_POLY_PRESS:
return EV_POLY_PRESS;
case EV_CONTROL:
return EV_CONTROL;
case EV_PROGRAM:
return EV_PROGRAM;
case EV_CHAN_PRESS:
return EV_CHAN_PRESS;
case EV_PITCH:
return EV_PITCH;
case EV_SYSEX:
switch (MIDI->event[0])
{
case EV_SYSEX: return EV_SYSEX;
case EV_ESC: return EV_SYSEX;
case EV_META: return EV_META;
}
default:
return EV_INVALID;
}
}
/***************************************************************/
unsigned MIDI_get_event(MIDI far *MIDI, int trk)
{
int type;
unsigned long cnt,len;
unsigned char far *temp;
if (MIDI_next_chr(MIDI,trk) >= 0x80)
MIDI->status[trk] = MIDI_get_chr(MIDI,trk);
if (MIDI->status[trk] < 0x80)
return 5;
MIDI->event_len = 0;
MIDI->event[MIDI->event_len++] = MIDI->status[trk];
switch (MIDI->status[trk] & 0xf0)
{
case EV_NOTE_OFF:
case EV_NOTE_ON:
case EV_POLY_PRESS:
case EV_CONTROL:
case EV_PITCH:
MIDI->event[MIDI->event_len++] = MIDI_get_chr(MIDI,trk);
case EV_PROGRAM:
case EV_CHAN_PRESS:
MIDI->event[MIDI->event_len++] = MIDI_get_chr(MIDI,trk);
break;
case EV_SYSEX:
switch (MIDI->status[trk])
{
case EV_META:
MIDI->event[MIDI->event_len++] = type = MIDI_get_chr(MIDI,trk);
switch (type)
{
case META_EOT:
MIDI->trk_active[trk] = 0;
break;
case META_TEMPO:
temp = MIDI->trk_ptr[trk];
MIDI_get_vln(MIDI,trk);
MIDI->tick_time = (100L * MIDI_get_24(MIDI,trk)) /
(unsigned long) MIDI->division;
MIDI->trk_ptr[trk] = temp;
break;
}
case EV_SYSEX:
case EV_ESC:
len = MIDI_get_vln(MIDI,trk);
MIDI->event_len += MIDI_put_vln(len,
&(MIDI->event[MIDI->event_len]));
for (cnt=0L;cnt<len;cnt++)
{
if (MIDI->event_len >= MAX_EVLEN)
return 3;
MIDI->event[MIDI->event_len++] = MIDI_get_chr(MIDI,trk);
}
break;
default:
return 4;
}
}
MIDI->pending_delta[trk] = MIDI_get_vln(MIDI,trk);
MIDI->event_chan = MIDI->event[0] & 0x0f;
return 0;
}
/***************************************************************/
unsigned MIDI_get_next_event(MIDI far *MIDI)
{
unsigned long event_delta,min_delta;
int trk,new_trk,trk_cnt;
new_trk = -1;
trk = MIDI->event_trk;
trk_cnt = MIDI->ntrks;
min_delta = MAX_ULONG;
do
{
if (MIDI->trk_active[trk])
{
event_delta = MIDI->pending_delta[trk];
if (event_delta <= min_delta)
{
min_delta = event_delta;
new_trk = trk;
}
}
if (trk-- == 0)
trk = MIDI->ntrks-1;
}
while (--trk_cnt);
if (new_trk == -1) return 0;
MIDI->event_trk = new_trk;
MIDI->event_time = min_delta;
for (trk=0;trk<MIDI->ntrks;trk++)
if (MIDI->trk_active[trk])
MIDI->pending_delta[trk] -= min_delta;
abend(MIDI_get_event(MIDI,new_trk),(unsigned long) MIDI->seq_fn,0L);
return 1;
}
/***************************************************************/
unsigned XMIDI_construct(XMIDI *XMIDI)
{
unsigned i;
XMIDI->RBRN.cnt = 0;
XMIDI->TIMB.cnt = 0;
XMIDI->q_int = (100000000L / (unsigned long) XMIDI->AILH.quantization);
XMIDI->DDA_sum = 0L;
XMIDI->interval = 0L;
XMIDI->delta = 0L;
for (i=0;i<MAX_NOTES;i++)
XMIDI->note_chan[i] = 255;
for (i=0;i<CHAN_CNT;i++)
{
XMIDI->rbs_BNK[i] = 0;
XMIDI->timb_BNK[i] = 0;
}
XMIDI->rbs_BNK[9] = 127;
XMIDI->EVNT.base = farmalloc(XMIDI->EVNT.avail);
IFF_construct(&XMIDI->EVNT);
return 0;
}
void XMIDI_destroy(XMIDI *XMIDI)
{
farfree(XMIDI->EVNT.base);
}
/***************************************************************/
void XMIDI_accum_interval(XMIDI *XMIDI,MIDI *MIDI)
{
XMIDI->DDA_sum += (MIDI->event_time * MIDI->tick_time);
while (XMIDI->DDA_sum >= XMIDI->q_int)
{
XMIDI->DDA_sum -= XMIDI->q_int;
XMIDI->interval++;
XMIDI->delta++;
}
}
/***************************************************************/
void XMIDI_write_interval(XMIDI *XMIDI)
{
while (XMIDI->delta > 127L)
{
IFF_put_byte(127,&XMIDI->EVNT);
XMIDI->delta -= 127L;
}
if (XMIDI->delta)
IFF_put_byte((unsigned) XMIDI->delta, &XMIDI->EVNT);
XMIDI->delta = 0L;
}
/***************************************************************/
void XMIDI_put_MIDI_event(XMIDI *XMIDI, MIDI *MIDI)
{
unsigned i;
if (XMIDI->delta) XMIDI_write_interval(XMIDI);
for (i=0;i<MIDI->event_len;i++)
IFF_put_byte(MIDI->event[i],&XMIDI->EVNT);
}
/***************************************************************/
unsigned XMIDI_log_branch(XMIDI *XMIDI, MIDI *MIDI)
{
unsigned i,b=XMIDI->RBRN.cnt;
if (b >= MAX_RBRN) return 10;
for (i=0;i<b;i++)
if (XMIDI->RBRN.brn[i].bnum == MIDI->event[2]) return 12;
XMIDI->RBRN.brn[b].offset = ptr_dif(XMIDI->EVNT.ptr,XMIDI->EVNT.base);
XMIDI->RBRN.brn[b].bnum = MIDI->event[2];
XMIDI->RBRN.cnt++;
return 0;
}
/***************************************************************/
unsigned XMIDI_log_timbre_request(XMIDI *XMIDI, MIDI *MIDI)
{
unsigned i,ch,val,t=XMIDI->TIMB.cnt;
ch = MIDI->event_chan;
if (t >= MAX_TIMB) return 11;
switch (MIDI_event_type(MIDI))
{
case EV_NOTE_ON:
val = XMIDI->rbs_BNK[ch];
for (i=0;i<t;i++)
if ((XMIDI->TIMB.tbr[i].t_bank == val) &&
(XMIDI->TIMB.tbr[i].t_num == MIDI->event[1])) break;
if (i == t)
{
XMIDI->TIMB.tbr[t].t_bank = val;
XMIDI->TIMB.tbr[t].t_num = MIDI->event[1];
XMIDI->TIMB.cnt++;
}
break;
case EV_CONTROL:
switch (MIDI->event[1])
{
case AIL_TIMB_BNK:
XMIDI->timb_BNK[ch] = MIDI->event[2];
break;
}
break;
case EV_PROGRAM:
for (i=0;i<t;i++)
if ((XMIDI->TIMB.tbr[i].t_bank == XMIDI->timb_BNK[ch]) &&
(XMIDI->TIMB.tbr[i].t_num == MIDI->event[1])) break;
if (i == t)
{
XMIDI->TIMB.tbr[t].t_bank = XMIDI->timb_BNK[ch];
XMIDI->TIMB.tbr[t].t_num = MIDI->event[1];
XMIDI->TIMB.cnt++;
}
break;
}
return 0;
}
/***************************************************************/
void XMIDI_note_off(XMIDI *XMIDI,MIDI *MIDI)
{
unsigned i,j;
unsigned long duration,offset,len;
unsigned char far *src, far *dest;
unsigned channel,note;
channel = MIDI->event_chan;
note = MIDI->event[1];
for (i=0;i<MAX_NOTES;i++)
if ((XMIDI->note_chan[i] == channel) && (XMIDI->note_num[i] == note))
{
XMIDI->note_chan[i] = 255;
duration = XMIDI->interval - XMIDI->note_intvl[i];
offset = (unsigned long) MIDI_vln_size(duration) - 1L;
if (offset)
{
dest = add_ptr(XMIDI->note_next[i],offset);
src = XMIDI->note_next[i];
len = ptr_dif(XMIDI->EVNT.ptr,XMIDI->note_next[i]);
far_memmove(dest,src,len);
XMIDI->EVNT.ptr = add_ptr(XMIDI->EVNT.ptr,offset);
XMIDI->EVNT.len += offset;
for (j=0;j<MAX_NOTES;j++)
if (XMIDI->note_chan[j] != 255)
if (ptr_dif(XMIDI->note_next[j],src) >= 0L)
XMIDI->note_next[j] =
add_ptr(XMIDI->note_next[j],offset);
for (j=0;j<XMIDI->RBRN.cnt;j++)
if (ptr_dif(add_ptr(XMIDI->EVNT.base,
XMIDI->RBRN.brn[j].offset),src) >= 0L)
XMIDI->RBRN.brn[j].offset += offset;
}
MIDI_put_vln(duration,add_ptr(XMIDI->note_next[i],-1L));
}
}
/***************************************************************/
unsigned XMIDI_note_on(XMIDI *XMIDI, MIDI *MIDI)
{
unsigned i;
XMIDI_put_MIDI_event(XMIDI,MIDI);
IFF_put_byte(0x00,&XMIDI->EVNT);
for (i=0;i<MAX_NOTES;i++)
if (XMIDI->note_chan[i] == 255)
{
XMIDI->note_chan[i] = MIDI->event_chan;
XMIDI->note_num[i] = MIDI->event[1];
XMIDI->note_intvl[i] = XMIDI->interval;
XMIDI->note_next[i] = XMIDI->EVNT.ptr;
break;
}
return (i==MAX_NOTES);
}
/***************************************************************/
unsigned XMIDI_verify_notes(XMIDI *XMIDI)
{
unsigned i;
for (i=0;i<MAX_NOTES;i++)
if (XMIDI->note_chan[i] != 255)
return 8;
return 0;
}
/***************************************************************/
unsigned XMIDI_IFF_write_blocks(XMIDI *XMIDI, FILE *out)
{
static IFF_block far IFF_TIMB;
static IFF_block far IFF_RBRN;
IFF_TIMB.name = "TIMB";
IFF_TIMB.base = (unsigned char far *) &XMIDI->TIMB;
IFF_TIMB.len = sizeof(TIMB_block) -
((MAX_TIMB - XMIDI->TIMB.cnt) * sizeof(TIMB_entry));
IFF_RBRN.name = "RBRN";
IFF_RBRN.base = (unsigned char far *) &XMIDI->RBRN;
IFF_RBRN.len = sizeof(RBRN_block) -
((MAX_RBRN - XMIDI->RBRN.cnt) * sizeof(RBRN_entry));
if (XMIDI->TIMB.cnt)
if (!IFF_write_block(out,&IFF_TIMB)) return 1;
if (XMIDI->RBRN.cnt)
if (!IFF_write_block(out,&IFF_RBRN)) return 1;
if (!IFF_write_block(out,&XMIDI->EVNT)) return 1;
return 0;
}
/***************************************************************/
void XMIDI_compile(char *src_fn, FILE *out, unsigned quant)
{
static MIDI far MIDI;
static XMIDI far XMIDI;
MIDI.seq_fn = src_fn;
MIDI.seq_len = file_size(MIDI.seq_fn);
MIDI.base = read_file(MIDI.seq_fn,NULL);
if (MIDI.base == NULL)
abend(1,get_disk_error(),(unsigned long) MIDI.seq_fn);