void _TBOX_PREFIX_App::update()
{
mPcmBuffer = mMonitorNode->getBuffer();
if ( !mPcmBuffer.isEmpty() )
mXtract->update( mPcmBuffer.getData() );
}
void _TBOX_PREFIX_App::drawPcmData()
{
if ( mPcmBuffer.isEmpty() )
return;
// draw the first(left) channel in the PCM buffer
// getData() returns a pointer to the first sample in the buffer
uint32_t bufferLength = mPcmBuffer.getSize() / mPcmBuffer.getNumChannels();
float *leftBuffer = mPcmBuffer.getData();
int displaySize = getWindowWidth();
float scale = displaySize / (float)bufferLength;
PolyLine<Vec2f> leftBufferLine;
gl::color( Color::gray( 0.4f ) );
for( int i = 0; i < bufferLength; i++ )
{
float x = i * scale;
float y = 50 + leftBuffer[i] * 60;
leftBufferLine.push_back( Vec2f( x , y) );
}
gl::draw( leftBufferLine );
}