Chris@152: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@152: 
Chris@152: /*
Chris@152:     Sonic Visualiser
Chris@152:     An audio file viewer and annotation editor.
Chris@152:     Centre for Digital Music, Queen Mary, University of London.
Chris@152:     This file copyright 2006 Chris Cannam.
Chris@152:     
Chris@152:     This program is free software; you can redistribute it and/or
Chris@152:     modify it under the terms of the GNU General Public License as
Chris@152:     published by the Free Software Foundation; either version 2 of the
Chris@152:     License, or (at your option) any later version.  See the file
Chris@152:     COPYING included with this distribution for more information.
Chris@152: */
Chris@152: 
Chris@152: #include "FFTModel.h"
Chris@152: #include "DenseTimeValueModel.h"
Chris@152: 
Chris@152: #include <cassert>
Chris@152: 
Chris@152: FFTModel::FFTModel(const DenseTimeValueModel *model,
Chris@152:                    int channel,
Chris@152:                    WindowType windowType,
Chris@152:                    size_t windowSize,
Chris@152:                    size_t windowIncrement,
Chris@152:                    size_t fftSize,
Chris@152:                    bool polar,
Chris@152:                    size_t fillFromColumn) :
Chris@152:     //!!! ZoomConstraint!
Chris@152:     m_server(0),
Chris@152:     m_xshift(0),
Chris@152:     m_yshift(0)
Chris@152: {
Chris@152:     m_server = FFTDataServer::getFuzzyInstance(model,
Chris@152:                                                channel,
Chris@152:                                                windowType,
Chris@152:                                                windowSize,
Chris@152:                                                windowIncrement,
Chris@152:                                                fftSize,
Chris@152:                                                polar,
Chris@152:                                                fillFromColumn);
Chris@152: 
Chris@152:     size_t xratio = windowIncrement / m_server->getWindowIncrement();
Chris@152:     size_t yratio = m_server->getFFTSize() / fftSize;
Chris@152: 
Chris@152:     while (xratio > 1) {
Chris@152:         if (xratio & 0x1) {
Chris@152:             std::cerr << "ERROR: FFTModel: Window increment ratio "
Chris@152:                       << windowIncrement << " / "
Chris@152:                       << m_server->getWindowIncrement()
Chris@152:                       << " must be a power of two" << std::endl;
Chris@152:             assert(!(xratio & 0x1));
Chris@152:         }
Chris@152:         ++m_xshift;
Chris@152:         xratio >>= 1;
Chris@152:     }
Chris@152: 
Chris@152:     while (yratio > 1) {
Chris@152:         if (yratio & 0x1) {
Chris@152:             std::cerr << "ERROR: FFTModel: FFT size ratio "
Chris@152:                       << m_server->getFFTSize() << " / " << fftSize
Chris@152:                       << " must be a power of two" << std::endl;
Chris@152:             assert(!(yratio & 0x1));
Chris@152:         }
Chris@152:         ++m_yshift;
Chris@152:         yratio >>= 1;
Chris@152:     }
Chris@152: }
Chris@152: 
Chris@152: FFTModel::~FFTModel()
Chris@152: {
Chris@152:     FFTDataServer::releaseInstance(m_server);
Chris@152: }
Chris@152: 
Chris@152: size_t
Chris@152: FFTModel::getSampleRate() const
Chris@152: {
Chris@152:     return isOK() ? m_server->getModel()->getSampleRate() : 0;
Chris@152: }
Chris@152: 
Chris@152: void
Chris@182: FFTModel::getColumn(size_t x, Column &result) const
Chris@152: {
Chris@152:     result.clear();
Chris@152:     size_t height(getHeight());
Chris@152:     for (size_t y = 0; y < height; ++y) {
Chris@152:         result.push_back(const_cast<FFTModel *>(this)->getMagnitudeAt(x, y));
Chris@152:     }
Chris@152: }
Chris@152: 
Chris@152: QString
Chris@152: FFTModel::getBinName(size_t n) const
Chris@152: {
Chris@152:     size_t sr = getSampleRate();
Chris@152:     if (!sr) return "";
Chris@152:     QString name = tr("%1 Hz").arg((n * sr) / (getHeight() * 2));
Chris@152:     return name;
Chris@152: }
Chris@152: 
Chris@152: Model *
Chris@152: FFTModel::clone() const
Chris@152: {
Chris@152:     return new FFTModel(*this);
Chris@152: }
Chris@152: 
Chris@152: FFTModel::FFTModel(const FFTModel &model) :
Chris@152:     DenseThreeDimensionalModel(),
Chris@152:     m_server(model.m_server),
Chris@152:     m_xshift(model.m_xshift),
Chris@152:     m_yshift(model.m_yshift)
Chris@152: {
Chris@152:     FFTDataServer::claimInstance(m_server);
Chris@152: }
Chris@152: