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pain
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#include <stdio.h>
int notes[8];
int tracknum=0;
int delay=0;
int tracksz[16]={0};
int main(int argc, char ** argv)
{
FILE * fp = fopen(argv[1],"rb");
FILE * out = fopen("TEMP","wb");
FILE * fp2 = fopen(argv[2],"wb");
start:
fseek(fp,5*tracknum,SEEK_SET);
int ev = getc(fp);
if(ev==0xC1)
{
fseek(fp,(5*tracknum)+2,SEEK_SET);
long off = (getc(fp)<<16) + (getc(fp)<<8) + getc(fp);
fseek(fp,off,SEEK_SET);
while(ev!=0xFF)
{
ev = getc(fp);
if(ev<0x80)
{
if(delay<=0x7F)
{
putc(delay,out);
tracksz[tracknum]+=4;
}
else if(delay<=0x3FFF)
{
putc(0x80+(delay>>7),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=5;
}
else if(delay<=0x1FFFFF)
{
putc(0x80+(delay>>14),out);
putc(0x80+((delay>>7)&0x7F),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=6;
}
else if(delay<=0xFFFFFFF)
{
putc(0x80+(delay>>21),out);
putc(0x80+((delay>>14)&0x7F),out);
putc(0x80+((delay>>7)&0x7F),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=7;
}
putc(0x90,out);
int note = ev;
putc(note,out);
int ppid = getc(fp);
notes[ppid]=note;
int vol = getc(fp);
putc(vol,out);
delay=0;
}
else if(ev==0x80)
{
delay += getc(fp);
}
else if(ev<0x88)
{
if(delay<=0x7F)
{
putc(delay,out);
tracksz[tracknum]+=4;
}
else if(delay<=0x3FFF)
{
putc(0x80+(delay>>7),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=5;
}
else if(delay<=0x1FFFFF)
{
putc(0x80+(delay>>14),out);
putc(0x80+((delay>>7)&0x7F),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=6;
}
else if(delay<=0xFFFFFFF)
{
putc(0x80+(delay>>21),out);
putc(0x80+((delay>>14)&0x7F),out);
putc(0x80+((delay>>7)&0x7F),out);
putc(delay&0x7F,out);
tracksz[tracknum]+=7;
}
putc(0x80,out);
int note = notes[ev&7];
putc(note,out);
putc(0,out);
delay=0;
}
else if(ev==0x88)
{
delay += (getc(fp)<<8) + getc(fp);
}
else if(ev==0x98) fseek(fp,2,SEEK_CUR);
else if(ev==0x9A) fseek(fp,3,SEEK_CUR);
else if(ev==0x9C) fseek(fp,3,SEEK_CUR);
else if(ev==0x9E) fseek(fp,4,SEEK_CUR);
else if(ev==0xA0) fseek(fp,2,SEEK_CUR);
else if(ev==0xA3) fseek(fp,2,SEEK_CUR);
else if(ev==0xA4) fseek(fp,2,SEEK_CUR);
else if(ev==0xA5) fseek(fp,2,SEEK_CUR);
else if(ev==0xA7) fseek(fp,2,SEEK_CUR);
else if(ev==0xA9) fseek(fp,4,SEEK_CUR);
else if(ev==0xAA) fseek(fp,4,SEEK_CUR);
else if(ev==0xAC) fseek(fp,3,SEEK_CUR);
else if(ev==0xAD) fseek(fp,3,SEEK_CUR);
else if(ev==0xB1)
{
fseek(fp,1,SEEK_CUR);
int flag = getc(fp);
if(flag==0x40) fseek(fp,2,SEEK_CUR);
else if(flag==0x80) fseek(fp,4,SEEK_CUR);
}
else if(ev==0xB8) fseek(fp,2,SEEK_CUR);
else if(ev==0xC2) fseek(fp,1,SEEK_CUR);
else if(ev==0xC4) fseek(fp,4,SEEK_CUR);
else if(ev==0xC5) fseek(fp,3,SEEK_CUR);
else if(ev==0xC6) fseek(fp,1,SEEK_CUR);
else if(ev==0xC7) fseek(fp,4,SEEK_CUR);
else if(ev==0xC8) fseek(fp,4,SEEK_CUR);
else if(ev==0xCB) fseek(fp,2,SEEK_CUR);
else if(ev==0xCC) fseek(fp,2,SEEK_CUR);
else if(ev==0xCF) fseek(fp,1,SEEK_CUR);
else if(ev==0xD0) fseek(fp,2,SEEK_CUR);
else if(ev==0xD1) fseek(fp,2,SEEK_CUR);
else if(ev==0xD2) fseek(fp,2,SEEK_CUR);
else if(ev==0xD5) fseek(fp,2,SEEK_CUR);
else if(ev==0xDA) fseek(fp,1,SEEK_CUR);
else if(ev==0xDB) fseek(fp,1,SEEK_CUR);
else if(ev==0xDD) fseek(fp,3,SEEK_CUR);
else if(ev==0xDF) fseek(fp,4,SEEK_CUR);
else if(ev==0xE0) fseek(fp,3,SEEK_CUR);
else if(ev==0xE6) fseek(fp,2,SEEK_CUR);
else if(ev==0xE7) fseek(fp,2,SEEK_CUR);
else if(ev==0xEF) fseek(fp,3,SEEK_CUR);
else if(ev==0xF0)
{
int value = getc(fp);
while(value&0x80)
{
value=(value&0x7F)<<7;
value+=getc(fp);
}
delay += value;
}
else if(ev==0xF1) fseek(fp,1,SEEK_CUR);
else if(ev==0xF4) fseek(fp,1,SEEK_CUR);
else if(ev==0xF9) fseek(fp,2,SEEK_CUR);
else if(ev==0xFD) fseek(fp,2,SEEK_CUR);
else if(ev==0xFE) fseek(fp,2,SEEK_CUR);
}
putc(0,out);
putc(0xFF,out);
putc(0x2F,out);
putc(0,out);
tracksz[tracknum]+=4;
tracknum++;
goto start;
}
fclose(fp);
fclose(out);
out = fopen("TEMP","rb");
putc('M',fp2);
putc('T',fp2);
putc('h',fp2);
putc('d',fp2);
putc(0,fp2);
putc(0,fp2);
putc(0,fp2);
putc(6,fp2);
putc(0,fp2);
putc(1,fp2);
putc(0,fp2);
putc(tracknum,fp2);
putc(0,fp2);
putc(120,fp2);
for(int i=0; i<tracknum; i++)
{
putc('M',fp2);
putc('T',fp2);
putc('r',fp2);
putc('k',fp2);
putc(0,fp2);
putc((tracksz[i]&0xFF0000)>>16,fp2);
putc((tracksz[i]&0xFF00)>>8,fp2);
putc(tracksz[i]&0xFF,fp2);
for(int j=0; j<tracksz[i]; j++)
{
int w = getc(out);
putc(w,fp2);
}
}
fclose(fp2);
fclose(out);
return 0;
}