Chris@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@0: 
Chris@13: #define _USE_MATH_DEFINES
Chris@13: #include <cmath>
Chris@13: 
Chris@9: #include "devuvuzelator-vst.h"
Chris@9: 
Chris@0: #include <iostream>
Chris@2: #include <cstdio>
Chris@0: 
Chris@9: #include "params.h"
Chris@2: 
Chris@2: #define snprintf _snprintf
Chris@2: #define alloca _alloca
Chris@0: 
Chris@1: // VST params 0->1
Chris@1: 
Chris@0: void
Chris@0: Devuvuzelator::setParameter(VstInt32 index, float value)
Chris@0: {
Chris@1:     switch (index) {
Chris@4:     case 0: m_fundamental = 50 + 720 * value; break;
Chris@4:     case 1: m_bandwidth = 20 + 80 * value; break;
Chris@4:     case 2: m_harmonics = int(value * 6 + 0.5); break;
Chris@4:     case 3: m_reduction = 100 * value; break;
Chris@1:     }
Chris@0: }
Chris@0: 
Chris@0: float
Chris@0: Devuvuzelator::getParameter(VstInt32 index)
Chris@0: {
Chris@1:     switch (index) {
Chris@4:     case 0: return (m_fundamental - 50) / 720;
Chris@4:     case 1: return (m_bandwidth - 20) / 80;
Chris@4:     case 2: return (m_harmonics / 6.f);
Chris@4:     case 3: return m_reduction / 100;
Chris@1:     }
Chris@4:     return 0;
Chris@0: }
Chris@0: 
Chris@0: // NB! The max name length for VST parameter names, labels
Chris@0: // (i.e. units) and display values (i.e. string renderings of current
Chris@0: // value) is a rather amazing 8 bytes
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::getParameterLabel(VstInt32 index, char *label)
Chris@0: {
Chris@0:     const char *units[NumParams] = {
Chris@0:         "Hz",
Chris@0:         "Hz",
Chris@0:         "",
Chris@4:         "%",
Chris@0:     };
Chris@0:     
Chris@0:     vst_strncpy(label, units[index], kVstMaxParamStrLen);
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::getParameterDisplay(VstInt32 index, char *label)
Chris@0: {
Chris@4:     switch (index) {
Chris@4:     case 0: snprintf(label, kVstMaxParamStrLen, "%f", m_fundamental); break;
Chris@4:     case 1: snprintf(label, kVstMaxParamStrLen, "%f", m_bandwidth); break;
Chris@4:     case 2: snprintf(label, kVstMaxParamStrLen, "%d", m_harmonics); break;
Chris@4:     case 3: snprintf(label, kVstMaxParamStrLen, "%f", m_reduction); break;
Chris@4:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::getParameterName(VstInt32 index, char *label)
Chris@0: {
Chris@0:     const char *names[NumParams] = {
Chris@0:         "Pitch",
Chris@0:         "B/W",
Chris@0:         "Partials",
Chris@0:         "Reductn",
Chris@0:     };
Chris@0:     
Chris@0:     vst_strncpy(label, names[index], kVstMaxParamStrLen);
Chris@0: }
Chris@0: 
Chris@0: Devuvuzelator::Devuvuzelator(audioMasterCallback cb) :
Chris@0:     AudioEffect(cb, 0, NumParams),
Chris@0:     m_sampleRate(0),
Chris@0:     m_input(0),
Chris@0:     m_output(0),
Chris@0:     m_fftsize(FFTSIZE),
Chris@7:     m_winsize(WINSIZE),
Chris@5:     m_increment(m_winsize/2),
Chris@9:     m_filtersecs(FILTERSECS),
Chris@0:     m_fill(0),
Chris@0:     m_read(0)
Chris@0: {
Chris@4:     m_buffer = new float[m_winsize];
Chris@4:     m_outacc = new float[m_winsize * 2];
Chris@4:     m_window = new double[m_winsize];
Chris@9:     m_frame = new double[m_fftsize];
Chris@9:     m_spare = new double[m_fftsize];
Chris@0:     m_real = new double[m_fftsize];
Chris@0:     m_imag = new double[m_fftsize];
Chris@4:     m_medians = new MedianFilter<double> *[m_fftsize/2+1];
Chris@0: 
Chris@4:     for (int i = 0; i < m_winsize; ++i) {
Chris@4:         m_window[i] = 0.5 - 0.5 * cos(2 * M_PI * i / m_winsize);
Chris@4:     }
Chris@4:     for (int i = 0; i < m_fftsize/2+1; ++i) {
Chris@4:         m_medians[i] = 0;
Chris@0:     }
Chris@0: 
Chris@4:     m_fundamental = 230;
Chris@0:     m_bandwidth = 60;
Chris@0:     m_harmonics = 3;
Chris@4:     m_reduction = 30;
Chris@0:     
Chris@2:     setUniqueID('qmvz');
Chris@0:     setNumInputs(1);
Chris@0:     setNumOutputs(1);
Chris@0:     canProcessReplacing(true);
Chris@0:     canDoubleReplacing(false);
Chris@0: 
Chris@0:     reset();
Chris@0: }
Chris@0: 
Chris@0: Devuvuzelator::~Devuvuzelator()
Chris@0: {
Chris@0:     delete[] m_buffer;
Chris@0:     delete[] m_outacc;
Chris@9:     delete[] m_frame;
Chris@9:     delete[] m_spare;
Chris@0:     delete[] m_real;
Chris@0:     delete[] m_imag;
Chris@0:     delete[] m_window;
Chris@4:     for (int i = 0; i < m_fftsize/2+1; ++i) {
Chris@4:         delete m_medians[i];
Chris@4:     }
Chris@4:     delete[] m_medians;
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::reset()
Chris@0: {
Chris@4:     for (int i = 0; i < m_winsize; ++i) {
Chris@0:         m_buffer[i] = 0.f;
Chris@0:     }
Chris@4:     for (int i = 0; i < m_winsize*2; ++i) {
Chris@0:         m_outacc[i] = 0.f;
Chris@0:     }
Chris@0:     m_fill = 0;
Chris@0:     m_read = 0;
Chris@4:     for (int i = 0; i < m_fftsize/2+1; ++i) {
Chris@4:         if (m_medians[i]) m_medians[i]->reset();
Chris@4:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::runImpl(unsigned long sampleCount)
Chris@0: {
Chris@0:     if (!m_input || !m_output) return;
Chris@0: 
Chris@4:     const int sc = sampleCount;
Chris@0: 
Chris@9:     float *output = m_output;
Chris@9:     if (m_input == m_output) {
Chris@9:         output = (float *)alloca(sampleCount * sizeof(float));
Chris@9:     }
Chris@0: 
Chris@9:     int oi = 0;
Chris@9:     for (int ii = 0; ii < sc; ++ii) {
Chris@0: 
Chris@9:         output[oi++] = m_outacc[m_read++];
Chris@4:         if (m_fill == m_winsize) {
Chris@0: 
Chris@0:             processFrame();
Chris@0: 
Chris@4:             for (int j = m_increment; j < m_winsize; ++j) {
Chris@0:                 m_buffer[j - m_increment] = m_buffer[j];
Chris@0:             }
Chris@0: 
Chris@4:             for (int j = m_increment; j < m_winsize*2; ++j) {
Chris@0:                 m_outacc[j - m_increment] = m_outacc[j];
Chris@0:             }
Chris@0: 
Chris@4:             for (int j = m_winsize*2 - m_increment; j < m_winsize*2; ++j) {
Chris@0:                 m_outacc[j] = 0.f;
Chris@0:             }
Chris@0: 
Chris@8:             m_fill = m_fill - m_increment;
Chris@8:             m_read = m_read - m_increment;
Chris@0:         }
Chris@9:         m_buffer[m_fill] = m_input[ii];
Chris@9:         ++m_fill;
Chris@8:     }
Chris@0: 
Chris@9:     if (m_input == m_output) {
Chris@9:         for (int i = 0; i < sc; ++i) m_output[i] = output[i];
Chris@9:     }
Chris@0: }
Chris@0: 
Chris@0: void
Chris@0: Devuvuzelator::processFrame()
Chris@0: {
Chris@0:     for (int i = 0; i < m_fftsize; ++i) {
Chris@8:         m_frame[i] = 0.0;
Chris@4:     }
Chris@4: 
Chris@4:     int ix = m_fftsize - m_winsize/2;
Chris@4:     while (ix < 0) ix += m_fftsize;
Chris@4:     for (int i = 0; i < m_winsize; ++i) {
Chris@8:         m_frame[ix++] += m_buffer[i] * m_window[i];
Chris@0:         if (ix == m_fftsize) ix = 0;
Chris@0:     }
Chris@0: 
Chris@8:     fft(m_fftsize, false, m_frame, 0, m_real, m_imag);
Chris@0: 
Chris@9:     processSpectralFrame();
Chris@0: 
Chris@0:     for (int i = 0; i < m_fftsize/2-1; ++i) {
Chris@3:         m_real[m_fftsize-i-1] =  m_real[i+1];
Chris@3:         m_imag[m_fftsize-i-1] = -m_imag[i+1];
Chris@0:     }
Chris@0: 
Chris@8:     fft(m_fftsize, true, m_real, m_imag, m_frame, m_spare);
Chris@0: 
Chris@4:     ix = m_fftsize - m_winsize/2;
Chris@4:     while (ix < 0) ix += m_fftsize;
Chris@4:     for (int i = 0; i < m_winsize; ++i) {
Chris@8:         m_outacc[m_winsize + i] += m_frame[ix++];
Chris@0:         if (ix == m_fftsize) ix = 0;
Chris@0:     }
Chris@0: }
Chris@0: 
Chris@0: AudioEffect *createEffectInstance(audioMasterCallback audioMaster)
Chris@0: {
Chris@0:     return new Devuvuzelator(audioMaster);
Chris@0: }
Chris@0: 
Chris@1: