28 lines
694 B
C++
28 lines
694 B
C++
#include "main.h"
|
|
#include "cvt.h"
|
|
|
|
bool is_gmf(const BYTE* p,size_t s)
|
|
{
|
|
return s>0x20 && *(DWORD*)p==_rv('GMF\x01');
|
|
}
|
|
|
|
bool load_gmf(MIDI_file * mf,const BYTE* buf,size_t siz)
|
|
{
|
|
grow_buf wb;
|
|
wb.write_dword(_rv('MThd'));
|
|
wb.write_dword(_rv(6));
|
|
MIDIHEADER h={0x000,0x100,0xC000};
|
|
wb.write(&h,6);
|
|
wb.write_dword(_rv('MTrk'));
|
|
int tempo=100000*rev16(*(WORD*)(buf+4));
|
|
wb.write_dword(rev32(siz-9+8+3));//MTrk size
|
|
BYTE tempo_event[8]={0,0xFF,0x51,0x03,(BYTE)((tempo>>16)&0xFF),(BYTE)((tempo>>8)&0xFF),(BYTE)(tempo&0xFF),0};
|
|
wb.write(tempo_event,8);
|
|
wb.write(buf+8,siz-9);
|
|
wb.write("\xFF\x2F\x00",3);
|
|
mf->size = wb.get_size();
|
|
mf->data = (BYTE*)wb.finish();
|
|
|
|
return !!mf->data;
|
|
}
|