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readmidi.c
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/*
TiMidity -- Experimental MIDI to WAVE converter
Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
This program is free software; you can redistribute it and/or modify
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it under the terms of the Perl Artistic License, available in COPYING.
*/
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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
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#include <string.h>
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#include <SDL_rwops.h>
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#include "config.h"
#include "common.h"
#include "instrum.h"
#include "playmidi.h"
#include "readmidi.h"
#include "output.h"
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#include "ctrlmode.h"
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int32 quietchannels=0;
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static int midi_port_number;
char midi_name[FILENAME_MAX+1];
static int track_info, curr_track, curr_title_track;
static char title[128];
#if MAXCHAN <= 16
#define MERGE_CHANNEL_PORT(ch) ((int)(ch))
#else
#define MERGE_CHANNEL_PORT(ch) ((int)(ch) | (midi_port_number << 4))
#endif
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/* to avoid some unnecessary parameter passing */
static MidiEventList *evlist;
static int32 event_count;
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static SDL_RWops *rw;
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static int32 at;
/* These would both fit into 32 bits, but they are often added in
large multiples, so it's simpler to have two roomy ints */
static int32 sample_increment, sample_correction; /*samples per MIDI delta-t*/
/* Computes how many (fractional) samples one MIDI delta-time unit contains */
static void compute_sample_increment(int32 tempo, int32 divisions)
{
double a;
a = (double) (tempo) * (double) (play_mode->rate) * (65536.0/1000000.0) /
(double)(divisions);
sample_correction = (int32)(a) & 0xFFFF;
sample_increment = (int32)(a) >> 16;
ctl->cmsg(CMSG_INFO, VERB_DEBUG, "Samples per delta-t: %d (correction %d)",
sample_increment, sample_correction);
}
/* Read variable-length number (7 bits per byte, MSB first) */
static int32 getvl(void)
{
int32 l=0;
uint8 c;
for (;;)
{
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SDL_RWread(rw,&c,1,1);
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l += (c & 0x7f);
if (!(c & 0x80)) return l;
l<<=7;
}
}
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static int sysex(uint32 len, uint8 *syschan, uint8 *sysa, uint8 *sysb, SDL_RWops *rw)
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{
unsigned char *s=(unsigned char *)safe_malloc(len);
int id, model, ch, port, adhi, adlo, cd, dta, dtb, dtc;
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if (len != (uint32)SDL_RWread(rw, s, 1, len))
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{
free(s);
return 0;
}
if (len<5) { free(s); return 0; }
if (curr_track == curr_title_track && track_info > 1) title[0] = '\0';
id=s[0]; port=s[1]; model=s[2]; adhi=s[3]; adlo=s[4];
if (id==0x7e && port==0x7f && model==0x09 && adhi==0x01)
{
ctl->cmsg(CMSG_TEXT, VERB_VERBOSE, "GM System On", len);
GM_System_On=1;
free(s);
return 0;
}
ch = adlo & 0x0f;
*syschan=(uint8)ch;
if (id==0x7f && len==7 && port==0x7f && model==0x04 && adhi==0x01)
{
ctl->cmsg(CMSG_TEXT, VERB_DEBUG, "Master Volume %d", s[4]+(s[5]<<7));
*sysa = s[4];
*sysb = s[5];
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free(s);
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return ME_MASTERVOLUME;
/** return s[4]+(s[5]<<7); **/
}
if (len<8) { free(s); return 0; }
port &=0x0f;
ch = (adlo & 0x0f) | ((port & 0x03) << 4);
*syschan=(uint8)ch;
cd=s[5]; dta=s[6];
if (len >= 8) dtb=s[7];
else dtb=-1;
if (len >= 9) dtc=s[8];
else dtc=-1;
free(s);
if (id==0x43 && model==0x4c)
{
if (!adhi && !adlo && cd==0x7e && !dta)
{
ctl->cmsg(CMSG_TEXT, VERB_VERBOSE, "XG System On", len);
XG_System_On=1;
#ifdef tplus
vol_table = xg_vol_table;
#endif
}
else if (adhi == 2 && adlo == 1)
{
if (dtb==8) dtb=3;
switch (cd)
{
case 0x00:
XG_System_reverb_type=(dta<<3)+dtb;
break;
case 0x20:
XG_System_chorus_type=((dta-64)<<3)+dtb;
break;
case 0x40:
XG_System_variation_type=dta;
break;
case 0x5a:
/* dta==0 Insertion; dta==1 System */
break;
default: break;
}
}
else if (adhi == 8 && cd <= 40)
{
*sysa = dta & 0x7f;
switch (cd)
{
case 0x01: /* bank select MSB */
return ME_TONE_KIT;
break;
case 0x02: /* bank select LSB */
return ME_TONE_BANK;
break;
case 0x03: /* program number */
/** MIDIEVENT(d->at, ME_PROGRAM, lastchan, a, 0); **/
return ME_PROGRAM;
break;
case 0x08: /* */
/* d->channel[adlo&0x0f].transpose = (char)(dta-64); */
channel[ch].transpose = (char)(dta-64);
ctl->cmsg(CMSG_TEXT, VERB_DEBUG, "transpose channel %d by %d",
(adlo&0x0f)+1, dta-64);
break;
case 0x0b: /* volume */
return ME_MAINVOLUME;
break;
case 0x0e: /* pan */
return ME_PAN;
break;
case 0x12: /* chorus send */
return ME_CHORUSDEPTH;
break;
case 0x13: /* reverb send */
return ME_REVERBERATION;
break;
case 0x14: /* variation send */
break;
case 0x18: /* filter cutoff */
return ME_BRIGHTNESS;
break;
case 0x19: /* filter resonance */
return ME_HARMONICCONTENT;
break;
default: break;
}
}
return 0;
}
else if (id==0x41 && model==0x42 && adhi==0x12 && adlo==0x40)
{
if (dtc<0) return 0;
if (!cd && dta==0x7f && !dtb && dtc==0x41)
{
ctl->cmsg(CMSG_TEXT, VERB_VERBOSE, "GS System On", len);
GS_System_On=1;
#ifdef tplus
vol_table = gs_vol_table;
#endif
}
else if (dta==0x15 && (cd&0xf0)==0x10)
{
int chan=cd&0x0f;
if (!chan) chan=9;
else if (chan<10) chan--;
chan = MERGE_CHANNEL_PORT(chan);
channel[chan].kit=dtb;
}
else if (cd==0x01) switch(dta)
{
case 0x30:
switch(dtb)
{
case 0: XG_System_reverb_type=16+0; break;
case 1: XG_System_reverb_type=16+1; break;
case 2: XG_System_reverb_type=16+2; break;
case 3: XG_System_reverb_type= 8+0; break;
case 4: XG_System_reverb_type= 8+1; break;
case 5: XG_System_reverb_type=32+0; break;
case 6: XG_System_reverb_type=8*17; break;
case 7: XG_System_reverb_type=8*18; break;
}
break;
case 0x38:
switch(dtb)
{
case 0: XG_System_chorus_type= 8+0; break;
case 1: XG_System_chorus_type= 8+1; break;
case 2: XG_System_chorus_type= 8+2; break;
case 3: XG_System_chorus_type= 8+4; break;
case 4: XG_System_chorus_type= -1; break;
case 5: XG_System_chorus_type= 8*3; break;
case 6: XG_System_chorus_type= -1; break;
case 7: XG_System_chorus_type= -1; break;
}
break;
}
return 0;
}
return 0;
}
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/* Print a string from the file, followed by a newline. Any non-ASCII
or unprintable characters will be converted to periods. */
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static int dumpstring(int32 len, const char *label)
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{
signed char *s=safe_malloc(len+1);
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if (len != (int32)SDL_RWread(rw, s, 1, len))
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{
free(s);
return -1;
}
s[len]='\0';
while (len--)
{
if (s[len]<32)
s[len]='.';
}
ctl->cmsg(CMSG_TEXT, VERB_VERBOSE, "%s%s", label, s);
free(s);
return 0;
}
#define MIDIEVENT(at,t,ch,pa,pb) \
new=safe_malloc(sizeof(MidiEventList)); \
new->event.time=at; new->event.type=t; new->event.channel=ch; \
new->event.a=pa; new->event.b=pb; new->next=0;\
return new;
#define MAGIC_EOT ((MidiEventList *)(-1))
/* Read a MIDI event, returning a freshly allocated element that can
be linked to the event list */
static MidiEventList *read_midi_event(void)
{
static uint8 laststatus, lastchan;
static uint8 nrpn=0, rpn_msb[16], rpn_lsb[16]; /* one per channel */
uint8 me, type, a,b,c;
int32 len;
MidiEventList *new;
for (;;)
{
at+=getvl();
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if (SDL_RWread(rw,&me,1,1)!=1)
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{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: read_midi_event: %s",
current_filename, strerror(errno));
return 0;
}
if(me==0xF0 || me == 0xF7) /* SysEx event */
{
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int32 sret;
uint8 sysa=0, sysb=0, syschan=0;
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len=getvl();
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sret=sysex(len, &syschan, &sysa, &sysb, rw);
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if (sret)
{
MIDIEVENT(at, sret, syschan, sysa, sysb);
}
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}
else if(me==0xFF) /* Meta event */
{
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SDL_RWread(rw,&type,1,1);
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len=getvl();
if (type>0 && type<16)
{
static char *label[]={
"Text event: ", "Text: ", "Copyright: ", "Track name: ",
"Instrument: ", "Lyric: ", "Marker: ", "Cue point: "};
dumpstring(len, label[(type>7) ? 0 : type]);
}
else
switch(type)
{
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case 0x21: /* MIDI port number */
if(len == 1)
{
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SDL_RWread(rw,&midi_port_number,1,1);
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if(midi_port_number == EOF)
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"Warning: \"%s\": Short midi file.",
midi_name);
return 0;
}
midi_port_number &= 0x0f;
if (midi_port_number)
ctl->cmsg(CMSG_INFO, VERB_VERBOSE,
"(MIDI port number %d)", midi_port_number);
midi_port_number &= 0x03;
}
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else SDL_RWseek(rw, len, RW_SEEK_CUR);
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break;
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case 0x2F: /* End of Track */
return MAGIC_EOT;
case 0x51: /* Tempo */
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SDL_RWread(rw,&a,1,1); SDL_RWread(rw,&b,1,1); SDL_RWread(rw,&c,1,1);
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MIDIEVENT(at, ME_TEMPO, c, a, b);
default:
ctl->cmsg(CMSG_INFO, VERB_DEBUG,
"(Meta event type 0x%02x, length %ld)", type, len);
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SDL_RWseek(rw, len, RW_SEEK_CUR);
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break;
}
}
else
{
a=me;
if (a & 0x80) /* status byte */
{
lastchan=a & 0x0F;
laststatus=(a>>4) & 0x07;
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SDL_RWread(rw,&a, 1,1);
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a &= 0x7F;
}
switch(laststatus)
{
case 0: /* Note off */
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SDL_RWread(rw,&b, 1,1);
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b &= 0x7F;
MIDIEVENT(at, ME_NOTEOFF, lastchan, a,b);
case 1: /* Note on */
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SDL_RWread(rw,&b, 1,1);
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b &= 0x7F;
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if (curr_track == curr_title_track && track_info > 1) title[0] = '\0';
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MIDIEVENT(at, ME_NOTEON, lastchan, a,b);
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case 2: /* Key Pressure */
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SDL_RWread(rw,&b, 1,1);
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b &= 0x7F;
MIDIEVENT(at, ME_KEYPRESSURE, lastchan, a, b);
case 3: /* Control change */
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SDL_RWread(rw,&b, 1,1);
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b &= 0x7F;
{
int control=255;
switch(a)
{
case 7: control=ME_MAINVOLUME; break;
case 10: control=ME_PAN; break;
case 11: control=ME_EXPRESSION; break;
case 64: control=ME_SUSTAIN; break;
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case 71: control=ME_HARMONICCONTENT; break;
case 72: control=ME_RELEASETIME; break;
case 73: control=ME_ATTACKTIME; break;
case 74: control=ME_BRIGHTNESS; break;
case 91: control=ME_REVERBERATION; break;
case 93: control=ME_CHORUSDEPTH; break;
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case 120: control=ME_ALL_SOUNDS_OFF; break;
case 121: control=ME_RESET_CONTROLLERS; break;
case 123: control=ME_ALL_NOTES_OFF; break;
/* These should be the SCC-1 tone bank switch
commands. I don't know why there are two, or
why the latter only allows switching to bank 0.
Also, some MIDI files use 0 as some sort of
continuous controller. This will cause lots of
warnings about undefined tone banks. */
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case 0: if (XG_System_On) control = ME_TONE_KIT; else control=ME_TONE_BANK; break;
case 32: if (XG_System_On) control = ME_TONE_BANK; break;
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case 100: nrpn=0; rpn_msb[lastchan]=b; break;
case 101: nrpn=0; rpn_lsb[lastchan]=b; break;
case 99: nrpn=1; rpn_msb[lastchan]=b; break;
case 98: nrpn=1; rpn_lsb[lastchan]=b; break;
case 6:
if (nrpn)
{
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if (rpn_msb[lastchan]==1) switch (rpn_lsb[lastchan])
{
#ifdef tplus
case 0x08: control=ME_VIBRATO_RATE; break;
case 0x09: control=ME_VIBRATO_DEPTH; break;
case 0x0a: control=ME_VIBRATO_DELAY; break;
#endif
case 0x20: control=ME_BRIGHTNESS; break;
case 0x21: control=ME_HARMONICCONTENT; break;
/*
case 0x63: envelope attack rate
case 0x64: envelope decay rate
case 0x66: envelope release rate
*/
}
else switch (rpn_msb[lastchan])
{
/*
case 0x14: filter cutoff frequency
case 0x15: filter resonance
case 0x16: envelope attack rate
case 0x17: envelope decay rate
case 0x18: pitch coarse
case 0x19: pitch fine
*/
case 0x1a: drumvolume[lastchan][0x7f & rpn_lsb[lastchan]] = b; break;
case 0x1c:
if (!b) b=(int) (127.0*rand()/(RAND_MAX));
drumpanpot[lastchan][0x7f & rpn_lsb[lastchan]] = b;
break;
case 0x1d: drumreverberation[lastchan][0x7f & rpn_lsb[lastchan]] = b; break;
case 0x1e: drumchorusdepth[lastchan][0x7f & rpn_lsb[lastchan]] = b; break;
/*
case 0x1f: variation send level
*/
}
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ctl->cmsg(CMSG_INFO, VERB_DEBUG,
"(Data entry (MSB) for NRPN %02x,%02x: %ld)",
rpn_msb[lastchan], rpn_lsb[lastchan],
b);
break;
}
switch((rpn_msb[lastchan]<<8) | rpn_lsb[lastchan])
{
case 0x0000: /* Pitch bend sensitivity */
control=ME_PITCH_SENS;
break;
case 0x7F7F: /* RPN reset */
/* reset pitch bend sensitivity to 2 */
MIDIEVENT(at, ME_PITCH_SENS, lastchan, 2, 0);
default:
ctl->cmsg(CMSG_INFO, VERB_DEBUG,
"(Data entry (MSB) for RPN %02x,%02x: %ld)",
rpn_msb[lastchan], rpn_lsb[lastchan],
b);
break;
}
break;
default:
ctl->cmsg(CMSG_INFO, VERB_DEBUG,
"(Control %d: %d)", a, b);
break;
}
if (control != 255)
{
MIDIEVENT(at, control, lastchan, b, 0);
}
}
break;
case 4: /* Program change */
a &= 0x7f;
MIDIEVENT(at, ME_PROGRAM, lastchan, a, 0);
case 5: /* Channel pressure - NOT IMPLEMENTED */
break;
case 6: /* Pitch wheel */
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SDL_RWread(rw,&b, 1,1);
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b &= 0x7F;
MIDIEVENT(at, ME_PITCHWHEEL, lastchan, a, b);
default:
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"*** Can't happen: status 0x%02X, channel 0x%02X",
laststatus, lastchan);
break;
}
}
}
return new;
}
#undef MIDIEVENT
/* Read a midi track into the linked list, either merging with any previous
tracks or appending to them. */
static int read_track(int append)
{
MidiEventList *meep;
MidiEventList *next, *new;
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int32 len, next_pos, pos;
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char tmp[4];
meep=evlist;
if (append && meep)
{
/* find the last event in the list */
for (; meep->next; meep=meep->next)
;
at=meep->event.time;
}
else
at=0;
/* Check the formalities */
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if ((SDL_RWread(rw,tmp,1,4) != 4) || (SDL_RWread(rw,&len,4,1) != 1))
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{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"%s: Can't read track header.", current_filename);
return -1;
}
len=BE_LONG(len);
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next_pos = SDL_RWtell(rw) + len;
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if (memcmp(tmp, "MTrk", 4))
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"%s: Corrupt MIDI file.", current_filename);
return -2;
}
for (;;)
{
if (!(new=read_midi_event())) /* Some kind of error */
return -2;
if (new==MAGIC_EOT) /* End-of-track Hack. */
{
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pos = SDL_RWtell(rw);
if (pos < next_pos)
SDL_RWseek(rw, next_pos - pos, RW_SEEK_CUR);
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return 0;
}
next=meep->next;
while (next && (next->event.time < new->event.time))
{
meep=next;
next=meep->next;
}
new->next=next;
meep->next=new;
event_count++; /* Count the event. (About one?) */
meep=new;
}
}
/* Free the linked event list from memory. */
static void free_midi_list(void)
{
MidiEventList *meep, *next;
if (!(meep=evlist)) return;
while (meep)
{
next=meep->next;
free(meep);
meep=next;
}
evlist=0;
}
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static void xremap_percussion(int *banknumpt, int *this_notept, int this_kit) {
int i, newmap;
int banknum = *banknumpt;
int this_note = *this_notept;
int newbank, newnote;
if (this_kit != 127 && this_kit != 126) return;
for (i = 0; i < XMAPMAX; i++) {
newmap = xmap[i][0];
if (!newmap) return;
if (this_kit == 127 && newmap != XGDRUM) continue;
if (this_kit == 126 && newmap != SFXDRUM1) continue;
if (xmap[i][1] != banknum) continue;
if (xmap[i][3] != this_note) continue;
newbank = xmap[i][2];
newnote = xmap[i][4];
if (newbank == banknum && newnote == this_note) return;
if (!drumset[newbank]) return;
*banknumpt = newbank;
*this_notept = newnote;
return;
}
}
631
632
633
634
635
636
637
638
639
640
641
/* Allocate an array of MidiEvents and fill it from the linked list of
events, marking used instruments for loading. Convert event times to
samples: handle tempo changes. Strip unnecessary events from the list.
Free the linked list. */
static MidiEvent *groom_list(int32 divisions,int32 *eventsp,int32 *samplesp)
{
MidiEvent *groomed_list, *lp;
MidiEventList *meep;
int32 i, our_event_count, tempo, skip_this_event, new_value;
int32 sample_cum, samples_to_do, at, st, dt, counting_time;
642
643
int current_bank[MAXCHAN], current_banktype[MAXCHAN], current_set[MAXCHAN],
current_kit[MAXCHAN], current_program[MAXCHAN];
644
/* Or should each bank have its own current program? */
645
int dset, dnote, drumsflag, mprog;
646
647
for (i=0; i<MAXCHAN; i++)
648
649
{
current_bank[i]=0;
650
current_banktype[i]=0;
651
current_set[i]=0;
652
current_kit[i]=channel[i].kit;
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
current_program[i]=default_program;
}
tempo=500000;
compute_sample_increment(tempo, divisions);
/* This may allocate a bit more than we need */
groomed_list=lp=safe_malloc(sizeof(MidiEvent) * (event_count+1));
meep=evlist;
our_event_count=0;
st=at=sample_cum=0;
counting_time=2; /* We strip any silence before the first NOTE ON. */
for (i=0; i<event_count; i++)
{
skip_this_event=0;
ctl->cmsg(CMSG_INFO, VERB_DEBUG_SILLY,
"%6d: ch %2d: event %d (%d,%d)",
meep->event.time, meep->event.channel + 1,
meep->event.type, meep->event.a, meep->event.b);
if (meep->event.type==ME_TEMPO)
{
tempo=
meep->event.channel + meep->event.b * 256 + meep->event.a * 65536;
compute_sample_increment(tempo, divisions);
skip_this_event=1;
}
else if ((quietchannels & (1<<meep->event.channel)))
skip_this_event=1;
else switch (meep->event.type)
{
case ME_PROGRAM:
687
688
if (current_kit[meep->event.channel])
689
{
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
if (current_kit[meep->event.channel]==126)
{
/* note request for 2nd sfx rhythm kit */
if (meep->event.a && drumset[SFXDRUM2])
{
current_kit[meep->event.channel]=125;
current_set[meep->event.channel]=SFXDRUM2;
new_value=SFXDRUM2;
}
else if (!meep->event.a && drumset[SFXDRUM1])
{
current_set[meep->event.channel]=SFXDRUM1;
new_value=SFXDRUM1;
}
else
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"XG SFX drum set is undefined");
skip_this_event=1;
break;
}
}
712
713
714
715
716
717
if (drumset[meep->event.a]) /* Is this a defined drumset? */
new_value=meep->event.a;
else
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"Drum set %d is undefined", meep->event.a);
718
719
720
721
722
723
724
if (drumset[0])
new_value=meep->event.a=0;
else
{
skip_this_event=1;
break;
}
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
}
if (current_set[meep->event.channel] != new_value)
current_set[meep->event.channel]=new_value;
else
skip_this_event=1;
}
else
{
new_value=meep->event.a;
if ((current_program[meep->event.channel] != SPECIAL_PROGRAM)
&& (current_program[meep->event.channel] != new_value))
current_program[meep->event.channel] = new_value;
else
skip_this_event=1;
}
break;
case ME_NOTEON:
if (counting_time)
counting_time=1;
745
746
747
748
drumsflag = current_kit[meep->event.channel];
if (drumsflag) /* percussion channel? */
749
{
750
751
752
753
754
755
756
757
dset = current_set[meep->event.channel];
dnote=meep->event.a;
if (XG_System_On) xremap_percussion(&dset, &dnote, drumsflag);
/*if (current_config_pc42b) pcmap(&dset, &dnote, &mprog, &drumsflag);*/
if (drumsflag)
{
758
/* Mark this instrument to be loaded */
759
760
761
if (!(drumset[dset]->tone[dnote].layer))
{
drumset[dset]->tone[dnote].layer=
762
MAGIC_LOAD_INSTRUMENT;
763
764
765
766
767
768
}
else drumset[dset]->tone[dnote].last_used
= current_tune_number;
if (!channel[meep->event.channel].name) channel[meep->event.channel].name=
drumset[dset]->name;
}
769
}
770
771
if (!drumsflag) /* not percussion */
772
{
773
774
775
776
777
778
779
780
781
int chan=meep->event.channel;
int banknum;
if (current_banktype[chan]) banknum=SFXBANK;
else banknum=current_bank[chan];
mprog = current_program[chan];
if (mprog==SPECIAL_PROGRAM)
782
break;
783
784
785
786
787
788
789
790
if (XG_System_On && banknum==SFXBANK && !tonebank[SFXBANK] && tonebank[120])
banknum = 120;
/*if (current_config_pc42b) pcmap(&banknum, &dnote, &mprog, &drumsflag);*/
if (drumsflag)
{
791
/* Mark this instrument to be loaded */
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
if (!(drumset[dset]->tone[dnote].layer))
{
drumset[dset]->tone[dnote].layer=MAGIC_LOAD_INSTRUMENT;
}
else drumset[dset]->tone[dnote].last_used = current_tune_number;
if (!channel[meep->event.channel].name) channel[meep->event.channel].name=
drumset[dset]->name;
}
if (!drumsflag)
{
/* Mark this instrument to be loaded */
if (!(tonebank[banknum]->tone[mprog].layer))
{
tonebank[banknum]->tone[mprog].layer=MAGIC_LOAD_INSTRUMENT;
}
else tonebank[banknum]->tone[mprog].last_used = current_tune_number;
if (!channel[meep->event.channel].name) channel[meep->event.channel].name=
tonebank[banknum]->tone[mprog].name;
}
}
break;
case ME_TONE_KIT:
if (!meep->event.a || meep->event.a == 127)
{
new_value=meep->event.a;
if (current_kit[meep->event.channel] != new_value)
current_kit[meep->event.channel]=new_value;
else
skip_this_event=1;
break;
}
else if (meep->event.a == 126)
{
if (drumset[SFXDRUM1]) /* Is this a defined tone bank? */
new_value=meep->event.a;
else
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"XG rhythm kit %d is undefined", meep->event.a);
skip_this_event=1;
break;
}
current_set[meep->event.channel]=SFXDRUM1;
current_kit[meep->event.channel]=new_value;
break;
}
else if (meep->event.a != SFX_BANKTYPE)
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"XG kit %d is impossible", meep->event.a);
skip_this_event=1;
break;
}
if (current_kit[meep->event.channel])
{
skip_this_event=1;
break;
}
if (tonebank[SFXBANK] || tonebank[120]) /* Is this a defined tone bank? */
new_value=SFX_BANKTYPE;
else
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"XG Sfx bank is undefined");
skip_this_event=1;
break;
860
}
861
862
863
864
if (current_banktype[meep->event.channel]!=new_value)
current_banktype[meep->event.channel]=new_value;
else
skip_this_event=1;
865
866
867
break;
case ME_TONE_BANK:
868
if (current_kit[meep->event.channel])
869
870
871
872
{
skip_this_event=1;
break;
}
873
874
875
876
877
878
879
if (XG_System_On && meep->event.a > 0 && meep->event.a < 48) {
channel[meep->event.channel].variationbank=meep->event.a;
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"XG variation bank %d", meep->event.a);
new_value=meep->event.a=0;
}
else if (tonebank[meep->event.a]) /* Is this a defined tone bank? */
880
881
882
883
884
885
886
new_value=meep->event.a;
else
{
ctl->cmsg(CMSG_WARNING, VERB_VERBOSE,
"Tone bank %d is undefined", meep->event.a);
new_value=meep->event.a=0;
}
887
888
889
890
891
892
if (current_bank[meep->event.channel]!=new_value)
current_bank[meep->event.channel]=new_value;
else
skip_this_event=1;
break;
893
894
895
896
897
898
899
900
case ME_HARMONICCONTENT:
channel[meep->event.channel].harmoniccontent=meep->event.a;
break;
case ME_BRIGHTNESS:
channel[meep->event.channel].brightness=meep->event.a;
break;
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
}
/* Recompute time in samples*/
if ((dt=meep->event.time - at) && !counting_time)
{
samples_to_do=sample_increment * dt;
sample_cum += sample_correction * dt;
if (sample_cum & 0xFFFF0000)
{
samples_to_do += ((sample_cum >> 16) & 0xFFFF);
sample_cum &= 0x0000FFFF;
}
st += samples_to_do;
}
else if (counting_time==1) counting_time=0;
if (!skip_this_event)
{
/* Add the event to the list */
*lp=meep->event;
lp->time=st;
lp++;
our_event_count++;
}
at=meep->event.time;
meep=meep->next;
}
/* Add an End-of-Track event */
lp->time=st;
lp->type=ME_EOT;
our_event_count++;
free_midi_list();
*eventsp=our_event_count;
*samplesp=st;
return groomed_list;
}
938
MidiEvent *read_midi_file(SDL_RWops *mrw, int32 *count, int32 *sp)
939
940
941
942
943
944
{
int32 len, divisions;
int16 format, tracks, divisions_tmp;
int i;
char tmp[4];
945
rw = mrw;
946
947
948
949
event_count=0;
at=0;
evlist=0;
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
GM_System_On=GS_System_On=XG_System_On=0;
/* vol_table = def_vol_table; */
XG_System_reverb_type=XG_System_chorus_type=XG_System_variation_type=0;
memset(&drumvolume,-1,sizeof(drumvolume));
memset(&drumchorusdepth,-1,sizeof(drumchorusdepth));
memset(&drumreverberation,-1,sizeof(drumreverberation));
memset(&drumpanpot,NO_PANNING,sizeof(drumpanpot));
for (i=0; i<MAXCHAN; i++)
{
if (ISDRUMCHANNEL(i)) channel[i].kit = 127;
else channel[i].kit = 0;
channel[i].brightness = 64;
channel[i].harmoniccontent = 64;
channel[i].variationbank = 0;
channel[i].chorusdepth = 0;
channel[i].reverberation = 0;
channel[i].transpose = 0;
}
past_riff:
972
if ((SDL_RWread(rw,tmp,1,4) != 4) || (SDL_RWread(rw,&len,4,1) != 1))
973
{
974
/* if (ferror(fp))
975
976
977
978
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: %s", current_filename,
strerror(errno));
}
979
else*/
980
981
982
983
984
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"%s: Not a MIDI file!", current_filename);
return 0;
}
len=BE_LONG(len);
985
986
987
if (!memcmp(tmp, "RIFF", 4))
{
988
SDL_RWread(rw,tmp,1,12);
989
990
goto past_riff;
}
991
992
993
994
995
996
997
if (memcmp(tmp, "MThd", 4) || len < 6)
{
ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
"%s: Not a MIDI file!", current_filename);
return 0;
}
998
999
1000
SDL_RWread(rw,&format, 2, 1);
SDL_RWread(rw,&tracks, 2, 1);
SDL_RWread(rw,&divisions_tmp, 2, 1);