// perche' viene passata anche la canzone? E' davvero necessaria?
void Sampler::process( uint32_t nFrames, Song* pSong )
{
//infoLog( "[process]" );
AudioOutput* audio_output = Hydrogen::get_instance()->getAudioOutput();
assert( audio_output );
memset( __main_out_L, 0, nFrames * sizeof( float ) );
memset( __main_out_R, 0, nFrames * sizeof( float ) );
// Track output queues are zeroed by
// audioEngine_process_clearAudioBuffers()
// Max notes limit
int m_nMaxNotes = Preferences::get_instance()->m_nMaxNotes;
while ( ( int )__playing_notes_queue.size() > m_nMaxNotes ) {
Note *oldNote = __playing_notes_queue[ 0 ];
__playing_notes_queue.erase( __playing_notes_queue.begin() );
oldNote->get_instrument()->dequeue();
delete oldNote; // FIXME: send note-off instead of removing the note from the list?
}
for (std::vector<DrumkitComponent*>::iterator it = pSong->get_components()->begin() ; it != pSong->get_components()->end(); ++it) {
DrumkitComponent* component = *it;
component->reset_outs(nFrames);
}
// eseguo tutte le note nella lista di note in esecuzione
unsigned i = 0;
Note* pNote;
while ( i < __playing_notes_queue.size() ) {
pNote = __playing_notes_queue[ i ]; // recupero una nuova nota
if ( __render_note( pNote, nFrames, pSong ) ) { // la nota e' finita
__playing_notes_queue.erase( __playing_notes_queue.begin() + i );
pNote->get_instrument()->dequeue();
__queuedNoteOffs.push_back( pNote );
// delete pNote;
// pNote = NULL;
} else {
++i; // carico la prox nota
}
}
//Queue midi note off messages for notes that have a length specified for them
while ( !__queuedNoteOffs.empty() ) {
pNote = __queuedNoteOffs[0];
MidiOutput* midiOut = Hydrogen::get_instance()->getMidiOutput();
if( midiOut != NULL ){
midiOut->handleQueueNoteOff( pNote->get_instrument()->get_midi_out_channel(), pNote->get_midi_key(), pNote->get_midi_velocity() );
}
__queuedNoteOffs.erase( __queuedNoteOffs.begin() );
if( pNote != NULL) delete pNote;
pNote = NULL;
}//while
processPlaybackTrack(nFrames);
}
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;
}
