/**
* used by the getAudioEvents-method of the sequencer, this validates
* the present AudioEvents against the requested position
* and updates and flushes the removal queue
*
* @param instrument {BaseInstrument*} instrument to gather events from
* @param bufferPosition {int} the current buffers start pointer
* @param bufferEnd {int} the current buffers end pointer
*/
void collectSequencedEvents( BaseInstrument* instrument, int bufferPosition, int bufferEnd )
{
if ( !instrument->hasEvents() )
return;
AudioChannel* channel = instrument->audioChannel;
std::vector<BaseAudioEvent*>* audioEvents = instrument->getEvents();
// removal queue
std::vector<BaseAudioEvent*> removes;
// channel has an internal loop (e.g. drum machine) ? recalculate requested
// buffer position by subtracting all measures above the first
if ( channel->maxBufferPosition > 0 )
{
int samplesPerBar = AudioEngine::samples_per_bar;
while ( bufferPosition >= channel->maxBufferPosition )
{
bufferPosition -= samplesPerBar;
bufferEnd -= samplesPerBar;
}
}
int i = 0, amount = audioEvents->size();
for ( i; i < amount; i++ )
{
BaseAudioEvent* audioEvent = audioEvents->at( i );
if ( audioEvent->isEnabled() )
{
int sampleStart = audioEvent->getSampleStart();
int sampleEnd = audioEvent->getSampleEnd();
if ( audioEvent->isLoopeable() ||
( sampleStart >= bufferPosition && sampleStart <= bufferEnd ) ||
( sampleStart < bufferPosition && sampleEnd >= bufferPosition ))
{
if ( !audioEvent->isDeletable())
channel->addEvent( audioEvent );
else
removes.push_back( audioEvent );
}
}
}
// removal queue filled ? process it so we can safely
// remove "deleted" AudioEvents without errors occurring
if ( removes.size() > 0 )
{
int i = 0;
for ( i; i < removes.size(); i++ )
{
BaseAudioEvent* audioEvent = removes[ i ];
instrument->removeEvent( audioEvent, false );
}
}
}
TEST( BaseAudioEvent, LoopeableState )
{
BaseAudioEvent* audioEvent = new BaseAudioEvent();
ASSERT_FALSE( audioEvent->isLoopeable() )
<< "expected audio event not to be loopeable after construction";
audioEvent->setLoopeable( true );
ASSERT_TRUE( audioEvent->isLoopeable() )
<< "expected audio event to be loopeable after enabling loop";
audioEvent->setLoopeable( false );
ASSERT_FALSE( audioEvent->isLoopeable() )
<< "expected audio event not to be loopeable after disabling loop";
deleteAudioEvent( audioEvent );
}