comparison src/Modules/Output/Graphics/Scale/Scale.cc @ 116:47b009f2c936

- First add of a lot of graphics code from the old version. Not working yet, not even compiling yet.

+/*!
+ * \file
+ * \brief Frequency scale for generating filter banks and their frequencies
+ *
+ * \author Willem van Engen <[e-mail]>
+ * \date created 2006/09/28
+ * \version \$Id: Scale.cpp 459 2007-11-08 11:50:04Z tom $
+ */
+/* (c) 2006, University of Cambridge, Medical Research Council
+ * http://www.pdn.cam.ac.uk/groups/cnbh/aimmanual
+ */
+#include "Support/common.h"
+#include "Support/util.h"
+#include "Modules/Scale/Scale.h"
+#include "Modules/Scale/ScaleLinear.h"
+#include "Modules/Scale/ScaleERB.h"
+#include "Modules/Scale/ScaleLog.h"
+#include "Modules/Scale/ScaleLogScaled.h"
+
+Scale *Scale::Create(ScaleType iType, unsigned int min, unsigned int max, float density)
+{
+	switch(iType) {
+	case SCALE_LINEAR:
+		return static_cast<Scale*>(new ScaleLinear(min, max, density));
+	case SCALE_ERB:
+		return static_cast<Scale*>(new ScaleERB(min, max, density));
+	case SCALE_LOG:
+		return static_cast<Scale*>(new ScaleLog(min, max, density));
+	case SCALE_LOGSCALED:
+		return static_cast<Scale*>(new ScaleLogScaled(min, max, density));
+	default:
+		aimASSERT(0);
+		break;
+	}
+	// Unreachable code
+	aimASSERT(0);
+	return NULL;
+}
+
+Scale *Scale::Create(ScaleType iType)
+{
+	return Create(iType, 0, 0, 0);
+}
+
+Scale *Scale::Clone()
+{
+	Scale *pScale = Create(m_iType, m_iMin, m_iMax, m_fDensity);
+	aimASSERT(pScale);
+	pScale->m_fScaledCurHalfSum = m_fScaledCurHalfSum;
+	pScale->m_fScaledCurDiff = m_fScaledCurDiff;
+	return pScale;
+}
+
+float Scale::FromLinearScaled(float fVal)
+{
+	/*! This function returns
+	 *    ( FromLinear(fVal) - (fMinScaled+fMaxScaled)/2 ) / (fMaxScaled-fMinScaled)
+	 */
+	float fValScaled = FromLinear(fVal);
+	return (fValScaled - m_fScaledCurHalfSum) / m_fScaledCurDiff;
+}
+void Scale::FromLinearScaledExtrema(float fMin, float fMax)
+{
+	float fMinScaled = FromLinear(fMin);
+	float fMaxScaled = FromLinear(fMax);
+	m_fScaledCurHalfSum = (fMinScaled+fMaxScaled)/2;
+	m_fScaledCurDiff = fMaxScaled-fMinScaled;
+	m_fMin = fMin;
+	m_fMax = fMax;
+}
+void Scale::FromLinearScaledExtrema(Scale *pScale)
+{
+	aimASSERT(pScale);
+	FromLinearScaledExtrema(pScale->m_fMin, pScale->m_fMax);
+}
+
+SignalBank* Scale::CreateSignalBank(unsigned int iChannels, unsigned int iBufferlength, unsigned int iSamplerate)
+{
+	SignalBank *pBank;
+	double intpart, fracpart;
+	fracpart = modf((m_iMax-m_iMin)*m_fDensity, &intpart);
+	unsigned int nBankChan = (unsigned int) intpart;
+	if (fracpart >= 0.5f)
+        nBankChan++;
+
+	pBank = new SignalBank(iChannels, iBufferlength, iSamplerate, nBankChan);
+	aimASSERT(pBank);
+
+	float scaleDelta = ( FromLinear(m_iMax) - FromLinear(m_iMin) ) / (nBankChan-1);
+	float scaleCur = FromLinear(m_iMin);
+
+	for (unsigned int i=0; i<nBankChan; i++) {
+		pBank->setCentreFrequency(i, ToLinear(scaleCur));
+		scaleCur+=scaleDelta;
+	}
+
+	return pBank;
+}
+
+
+
+SignalBank* Scale::CreateSignalBank(Signal* pSig) {
+	aimASSERT(pSig);
+	return CreateSignalBank(pSig->getAudioChannels(), pSig->getBufferlength(), pSig->getSamplerate());
+}
+