bool setCutoff( int instrumentNumber, int value )
{
//helper function to set cutOff levels
Hydrogen *engine = Hydrogen::get_instance();
Song *song = engine->getSong();
InstrumentList *instrList = song->get_instrument_list();
Instrument *instr = instrList->get( instrumentNumber );
if ( instr == NULL) return false;
if( value != 0 ){
instr->set_filter_cutoff( (float) (value / 127.0 ) );
} else {
instr->set_filter_cutoff( 0 );
}
Hydrogen::get_instance()->setSelectedInstrumentNumber( instrList->index(instr) );
return true;
}
bool setInstrumentPitch( int instrumentNumber, int value )
{
//helper function to set cutOff levels
Hydrogen *engine = Hydrogen::get_instance();
Song *song = engine->getSong();
InstrumentList *instrList = song->get_instrument_list();
Instrument *instr = instrList->get( instrumentNumber );
if ( instr == NULL) return false;
if( value < 63 ){
instr->set_instrument_pitch( (float) ((value-62) / 62.0 * MAX_INSTRUMENT_PITCH ) );
} else if ( value > 64 ) {
instr->set_instrument_pitch( (float) ((value-65) / 62.0 * MAX_INSTRUMENT_PITCH ) );
} else {
instr->set_instrument_pitch( 0 );
}
Hydrogen::get_instance()->setSelectedInstrumentNumber( instrList->index(instr) );
return true;
}
void SMFWriter::save( const QString& sFilename, Song *pSong )
{
INFOLOG( "save" );
const int DRUM_CHANNEL = 9;
vector<SMFEvent*> eventList;
SMF smf;
// Standard MIDI format 1 files should have the first track being the tempo map
// which is a track that contains global meta events only.
SMFTrack *pTrack0 = new SMFTrack();
pTrack0->addEvent( new SMFCopyRightNoticeMetaEvent( pSong->__author , 0 ) );
pTrack0->addEvent( new SMFTrackNameMetaEvent( pSong->__name , 0 ) );
pTrack0->addEvent( new SMFSetTempoMetaEvent( pSong->__bpm , 0 ) );
pTrack0->addEvent( new SMFTimeSignatureMetaEvent( 4 , 4 , 24 , 8 , 0 ) );
smf.addTrack( pTrack0 );
// Standard MIDI Format 1 files should have note events in tracks =>2
SMFTrack *pTrack1 = new SMFTrack();
smf.addTrack( pTrack1 );
AutomationPath *vp = pSong->get_velocity_automation_path();
InstrumentList *iList = pSong->get_instrument_list();
// ogni pattern sara' una diversa traccia
int nTick = 1;
for ( unsigned nPatternList = 0 ;
nPatternList < pSong->get_pattern_group_vector()->size() ;
nPatternList++ ) {
// infoLog( "[save] pattern list pos: " + toString( nPatternList ) );
PatternList *pPatternList =
( *(pSong->get_pattern_group_vector()) )[ nPatternList ];
int nStartTicks = nTick;
int nMaxPatternLength = 0;
for ( unsigned nPattern = 0 ;
nPattern < pPatternList->size() ;
nPattern++ ) {
Pattern *pPattern = pPatternList->get( nPattern );
// infoLog( " |-> pattern: " + pPattern->getName() );
if ( ( int )pPattern->get_length() > nMaxPatternLength ) {
nMaxPatternLength = pPattern->get_length();
}
for ( unsigned nNote = 0; nNote < pPattern->get_length(); nNote++ ) {
const Pattern::notes_t* notes = pPattern->get_notes();
FOREACH_NOTE_CST_IT_BOUND(notes,it,nNote) {
Note *pNote = it->second;
if ( pNote ) {
float rnd = (float)rand()/(float)RAND_MAX;
if ( pNote->get_probability() < rnd ) {
continue;
}
float fPos = nPatternList + (float)nNote/(float)nMaxPatternLength;
float velocity_adjustment = vp->get_value(fPos);
int nVelocity =
(int)( 127.0 * pNote->get_velocity() * velocity_adjustment );
int nInstr = iList->index(pNote->get_instrument());
Instrument *pInstr = pNote->get_instrument();
int nPitch = pNote->get_midi_key();
eventList.push_back(
new SMFNoteOnEvent(
nStartTicks + nNote,
DRUM_CHANNEL,
nPitch,
nVelocity
)
);
int nLength = 12;
if ( pNote->get_length() != -1 ) {
nLength = pNote->get_length();
}
eventList.push_back(
new SMFNoteOffEvent(
nStartTicks + nNote + nLength,
DRUM_CHANNEL,
nPitch,
nVelocity
)
);
}
}
}
}
nTick += nMaxPatternLength;
}
