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-rw-r--r--gtk2_ardour/eq_gui.cc562
1 files changed, 562 insertions, 0 deletions
diff --git a/gtk2_ardour/eq_gui.cc b/gtk2_ardour/eq_gui.cc
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+++ b/gtk2_ardour/eq_gui.cc
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+/*
+ Copyright (C) 2008 Paul Davis
+ Author: Sampo Savolainen
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "eq_gui.h"
+#include "fft.h"
+
+#include "ardour_ui.h"
+#include <ardour/audio_buffer.h>
+#include <ardour/data_type.h>
+
+#include <gtkmm/box.h>
+#include <gtkmm/button.h>
+#include <gtkmm/checkbutton.h>
+
+#include <iostream>
+
+
+PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
+ : _mindB(-12.0),
+ _maxdB(+12.0),
+ _dBStep(3.0),
+ _impulseFft(0)
+{
+ _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
+
+ _plugin = pluginInsert->get_impulse_analysis_plugin();
+ _plugin->activate();
+
+ setBufferSize(4096);
+
+ _logCoeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
+ _logMax = log10f(1 + _logCoeff);
+
+
+ // Setup analysis drawing area
+ _analysisScaleSurface = 0;
+
+ _analysisArea = new Gtk::DrawingArea();
+ _analysisWidth = 500.0;
+ _analysisHeight = 500.0;
+ _analysisArea->set_size_request(_analysisWidth, _analysisHeight);
+
+ _analysisArea->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::exposeAnalysisArea));
+ _analysisArea->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resizeAnalysisArea));
+
+
+ // dB selection
+ dBScaleModel = Gtk::ListStore::create(dBColumns);
+
+ dBScaleCombo = new Gtk::ComboBox(dBScaleModel);
+ dBScaleCombo -> set_title("dB scale");
+
+#define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
+ { \
+ Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
+ row[dBColumns.dBMin] = (MIN); \
+ row[dBColumns.dBMax] = (MAX); \
+ row[dBColumns.dBStep] = (STEP); \
+ row[dBColumns.name] = NAME; \
+ }
+
+ ADD_DB_ROW( -6, +6, 1, "-6dB .. +6dB");
+ ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
+ ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
+ ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
+
+#undef ADD_DB_ROW
+
+ dBScaleCombo -> pack_start(dBColumns.name);
+ dBScaleCombo -> set_active(1);
+
+ dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::dBScaleChanged) );
+
+ Gtk::Label *dBComboLabel = new Gtk::Label("dB scale");
+
+ Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
+ dBSelectBin->add( *manage(dBComboLabel));
+ dBSelectBin->add( *manage(dBScaleCombo));
+
+ // Phase checkbutton
+ phaseSelect = new Gtk::CheckButton("Show phase");
+ phaseSelect->set_active(true);
+ phaseSelect->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redrawScales));
+
+ // Update button
+ Gtk::Button *btn = new Gtk::Button("Update");
+ btn->signal_clicked().connect( sigc::mem_fun(*this, &PluginEqGui::runAnalysis));
+
+ // populate table
+ attach( *manage(_analysisArea), 1, 4, 1, 2);
+ attach( *manage(dBSelectBin), 1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
+ attach( *manage(phaseSelect), 2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
+ attach( *manage(btn), 3, 4, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
+
+
+ // Timeout
+ //_updateConn = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeoutCallback), 250);
+}
+
+PluginEqGui::~PluginEqGui()
+{
+ std::cerr << "Destroying PluginEqGui for " << _plugin->name() << std::endl;
+ if (_analysisScaleSurface) {
+ cairo_surface_destroy (_analysisScaleSurface);
+ }
+
+ delete _impulseFft;
+ _plugin->deactivate();
+
+ // all gui objects are *manage'd by the inherited Table object
+}
+
+void
+PluginEqGui::on_hide()
+{
+ Gtk::Table::on_hide();
+ _updateConn.disconnect();
+}
+
+void
+PluginEqGui::on_show()
+{
+ Gtk::Table::on_show();
+ _updateConn = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeoutCallback), 250);
+}
+
+void
+PluginEqGui::dBScaleChanged()
+{
+ Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
+
+ Gtk::TreeModel::Row row;
+
+ if(iter && (row = *iter)) {
+ _mindB = row[dBColumns.dBMin];
+ _maxdB = row[dBColumns.dBMax];
+ _dBStep = row[dBColumns.dBStep];
+
+
+ redrawScales();
+ }
+}
+
+void
+PluginEqGui::redrawScales()
+{
+
+ if (_analysisScaleSurface) {
+ cairo_surface_destroy (_analysisScaleSurface);
+ _analysisScaleSurface = 0;
+ }
+
+ _analysisArea->queue_draw();
+}
+
+void
+PluginEqGui::setBufferSize(uint32_t size)
+{
+ if (_bufferSize == size)
+ return;
+
+ _bufferSize = size;
+
+ if (_impulseFft) {
+ delete _impulseFft;
+ _impulseFft = 0;
+ }
+
+ _impulseFft = new FFT(_bufferSize);
+
+ uint32_t inputs = _plugin->get_info()->n_inputs.n_audio();
+ uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
+
+ uint32_t n_chans = std::max(inputs, outputs);
+ _bufferset.ensure_buffers(ARDOUR::DataType::AUDIO, n_chans, _bufferSize);
+
+ ARDOUR::ChanCount chanCount(ARDOUR::DataType::AUDIO, n_chans);
+ _bufferset.set_count(chanCount);
+
+ /*
+
+ const uint32_t nbufs = _bufferset.count().n_audio();
+ std::cerr << "ensure_buffers(ARDOUR::DataType::Audio, " << n_chans << ", " << _bufferSize << "), _bufferset.count().n_audio() = " << nbufs << std::endl;
+ */
+}
+
+void
+PluginEqGui::resizeAnalysisArea(Gtk::Allocation& size)
+{
+ _analysisWidth = (float)size.get_width();
+ _analysisHeight = (float)size.get_height();
+
+ if (_analysisScaleSurface) {
+ cairo_surface_destroy (_analysisScaleSurface);
+ _analysisScaleSurface = 0;
+ }
+}
+
+bool
+PluginEqGui::timeoutCallback()
+{
+ /*
+ struct timeval tv;
+ struct timezone tz;
+
+ gettimeofday(&tv, &tz);
+ std::cerr << " time = " << tv.tv_sec << ":" << tv.tv_usec << std::endl;
+ */
+ runAnalysis();
+
+ return true;
+}
+
+void
+PluginEqGui::runAnalysis()
+{
+ uint32_t inputs = _plugin->get_info()->n_inputs.n_audio();
+ uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
+
+ const uint32_t nbufs = _bufferset.count().n_audio();
+
+ // Create the impulse, can't use silence() because consecutive calls won't work
+ for (uint32_t i = 0; i < inputs; ++i) {
+ ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
+ ARDOUR::Sample *d = buf.data(_bufferSize, 0);
+ memset(d, 0, sizeof(ARDOUR::Sample)*_bufferSize);
+ *d = 1.0;
+ }
+ uint32_t x,y;
+ x=y=0;
+
+ _plugin->connect_and_run(_bufferset, x, y, _bufferSize, (nframes_t)0);
+
+ // Analyze all output buffers
+ _impulseFft->reset();
+ for (uint32_t i = 0; i < outputs; ++i) {
+ _impulseFft->analyze(_bufferset.get_audio(i).data(_bufferSize, 0));
+ }
+
+ // normalize the output
+ _impulseFft->calculate();
+
+ // This signals calls exposeAnalysisArea()
+ _analysisArea->queue_draw();
+
+}
+
+bool
+PluginEqGui::exposeAnalysisArea(GdkEventExpose *evt)
+{
+ redrawAnalysisArea();
+
+ return false;
+}
+
+void
+PluginEqGui::generateAnalysisScale(cairo_t *ref_cr)
+{
+ // TODO: check whether we need rounding
+ _analysisScaleSurface = cairo_surface_create_similar(cairo_get_target(ref_cr),
+ CAIRO_CONTENT_COLOR,
+ _analysisWidth,
+ _analysisHeight);
+
+ cairo_t *cr = cairo_create (_analysisScaleSurface);
+
+ cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+ cairo_rectangle(cr, 0.0, 0.0, _analysisWidth, _analysisHeight);
+ cairo_fill(cr);
+
+
+ drawPowerScale(_analysisArea, cr);
+ if (phaseSelect->get_active()) {
+ drawPhaseScale(_analysisArea, cr);
+ }
+
+ cairo_destroy(cr);
+
+}
+
+void
+PluginEqGui::redrawAnalysisArea()
+{
+ cairo_t *cr;
+
+ cr = gdk_cairo_create(GDK_DRAWABLE(_analysisArea->get_window()->gobj()));
+
+ if (_analysisScaleSurface == 0) {
+ generateAnalysisScale(cr);
+ }
+
+
+ cairo_copy_page(cr);
+
+ cairo_set_source_surface(cr, _analysisScaleSurface, 0.0, 0.0);
+ cairo_paint(cr);
+
+ if (phaseSelect->get_active()) {
+ drawPhase(_analysisArea, cr);
+ }
+ drawPower(_analysisArea, cr);
+
+
+ cairo_destroy(cr);
+
+
+}
+
+#define PHASE_PROPORTION 0.6
+
+void
+PluginEqGui::drawPhaseScale(Gtk::Widget *w, cairo_t *cr)
+{
+ float y;
+ cairo_font_extents_t extents;
+ cairo_font_extents(cr, &extents);
+
+ char buf[256];
+ cairo_text_extents_t t_ext;
+
+ for (uint32_t i = 0; i < 3; i++) {
+
+ y = _analysisHeight/2.0 - (float)i*(_analysisHeight/8.0)*PHASE_PROPORTION;
+
+ cairo_set_source_rgb(cr, .8, .9, 0.2);
+ if (i == 0) {
+ snprintf(buf,256, "0\u00b0");
+ } else {
+ snprintf(buf,256, "%d\u00b0", (i * 45));
+ }
+ cairo_text_extents(cr, buf, &t_ext);
+ cairo_move_to(cr, _analysisWidth - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
+ cairo_show_text(cr, buf);
+
+ if (i == 0)
+ continue;
+
+
+ cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
+ cairo_move_to(cr, 0.0, y);
+ cairo_line_to(cr, _analysisWidth, y);
+
+
+ y = _analysisHeight/2.0 + (float)i*(_analysisHeight/8.0)*PHASE_PROPORTION;
+
+ // label
+ snprintf(buf,256, "-%d\u00b0", (i * 45));
+ cairo_set_source_rgb(cr, .8, .9, 0.2);
+ cairo_text_extents(cr, buf, &t_ext);
+ cairo_move_to(cr, _analysisWidth - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
+ cairo_show_text(cr, buf);
+
+ // line
+ cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
+ cairo_move_to(cr, 0.0, y);
+ cairo_line_to(cr, _analysisWidth, y);
+
+ cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
+ cairo_stroke(cr);
+ }
+}
+
+void
+PluginEqGui::drawPhase(Gtk::Widget *w, cairo_t *cr)
+{
+ float x,y;
+
+ int prevX = 0;
+ float avgY = 0.0;
+ int avgNum = 0;
+
+ cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
+ for (uint32_t i = 0; i < _impulseFft->bins()-1; i++) {
+ // x coordinate of bin i
+ x = log10f(1.0 + (float)i / (float)_impulseFft->bins() * _logCoeff) / _logMax;
+ x *= _analysisWidth;
+
+ y = _analysisHeight/2.0 - (_impulseFft->phaseAtBin(i)/M_PI)*(_analysisHeight/2.0)*PHASE_PROPORTION;
+
+ if ( i == 0 ) {
+ cairo_move_to(cr, x, y);
+
+ avgY = 0;
+ avgNum = 0;
+ } else if (rint(x) > prevX || i == _impulseFft->bins()-1 ) {
+ cairo_line_to(cr, prevX, avgY/(float)avgNum);
+
+ avgY = 0;
+ avgNum = 0;
+
+ }
+
+ prevX = rint(x);
+ avgY += y;
+ avgNum++;
+ }
+
+ cairo_set_line_width (cr, 2.0);
+ cairo_stroke(cr);
+}
+
+void
+PluginEqGui::drawPowerScale(Gtk::Widget *w, cairo_t *cr)
+{
+ static float scales[] = { 30.0, 70.0, 125.0, 250.0, 500.0, 1000.0, 2000.0, 5000.0, 10000.0, 15000.0, 20000.0, -1.0 };
+
+ float divisor = _samplerate / 2.0 / _impulseFft->bins();
+ float x;
+
+ cairo_set_line_width (cr, 1.5);
+ cairo_set_font_size(cr, 9);
+
+ cairo_font_extents_t extents;
+ cairo_font_extents(cr, &extents);
+ float fontXOffset = extents.descent + 1.0;
+
+ char buf[256];
+
+ for (uint32_t i = 0; scales[i] != -1.0; ++i) {
+ float bin = scales[i] / divisor;
+
+ x = log10f(1.0 + bin / (float)_impulseFft->bins() * _logCoeff) / _logMax;
+ x *= _analysisWidth;
+
+ if (scales[i] < 1000.0) {
+ snprintf(buf, 256, "%0.0f", scales[i]);
+ } else {
+ snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
+ }
+
+ cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
+
+ cairo_move_to(cr, x + fontXOffset, 3.0);
+
+ cairo_rotate(cr, M_PI / 2.0);
+ cairo_show_text(cr, buf);
+ cairo_rotate(cr, -M_PI / 2.0);
+ cairo_stroke(cr);
+
+ cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
+ cairo_move_to(cr, x, _analysisHeight);
+ cairo_line_to(cr, x, 0.0);
+ cairo_stroke(cr);
+ }
+
+ float y;
+
+ //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
+ double dashes[] = { 3.0, 5.0 };
+
+ for (float dB = 0.0; dB < _maxdB; dB += _dBStep ) {
+ snprintf(buf, 256, "+%0.0f", dB );
+
+ y = ( _maxdB - dB) / ( _maxdB - _mindB );
+ //std::cerr << " y = " << y << std::endl;
+ y *= _analysisHeight;
+
+ if (dB != 0.0) {
+ cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
+ cairo_move_to(cr, 1.0, y + extents.height + 1.0);
+ cairo_show_text(cr, buf);
+ cairo_stroke(cr);
+ }
+
+ cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
+ cairo_move_to(cr, 0, y);
+ cairo_line_to(cr, _analysisWidth, y);
+ cairo_stroke(cr);
+
+ if (dB == 0.0) {
+ cairo_set_dash(cr, dashes, 2, 0.0);
+ }
+ }
+
+
+
+ for (float dB = - _dBStep; dB > _mindB; dB -= _dBStep ) {
+ snprintf(buf, 256, "%0.0f", dB );
+
+ y = ( _maxdB - dB) / ( _maxdB - _mindB );
+ y *= _analysisHeight;
+
+ cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
+ cairo_move_to(cr, 1.0, y - extents.descent - 1.0);
+ cairo_show_text(cr, buf);
+ cairo_stroke(cr);
+
+ cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
+ cairo_move_to(cr, 0, y);
+ cairo_line_to(cr, _analysisWidth, y);
+ cairo_stroke(cr);
+ }
+
+ cairo_set_dash(cr, 0, 0, 0.0);
+
+}
+
+inline float
+power_to_dB(float a)
+{
+ return 10.0 * log10f(a);
+}
+
+void
+PluginEqGui::drawPower(Gtk::Widget *w, cairo_t *cr)
+{
+ float x,y;
+
+ int prevX = 0;
+ float avgY = 0.0;
+ int avgNum = 0;
+
+ cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+ cairo_set_line_width (cr, 2.5);
+
+ for (uint32_t i = 0; i < _impulseFft->bins()-1; i++) {
+ // x coordinate of bin i
+ x = log10f(1.0 + (float)i / (float)_impulseFft->bins() * _logCoeff) / _logMax;
+ x *= _analysisWidth;
+
+ float yCoeff = ( power_to_dB(_impulseFft->powerAtBin(i)) - _mindB) / (_maxdB - _mindB);
+
+ y = _analysisHeight - _analysisHeight*yCoeff;
+
+ if ( i == 0 ) {
+ cairo_move_to(cr, x, y);
+
+ avgY = 0;
+ avgNum = 0;
+ } else if (rint(x) > prevX || i == _impulseFft->bins()-1 ) {
+ cairo_line_to(cr, prevX, avgY/(float)avgNum);
+
+ avgY = 0;
+ avgNum = 0;
+
+ }
+
+ prevX = rint(x);
+ avgY += y;
+ avgNum++;
+ }
+
+ cairo_stroke(cr);
+}
+
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