2 Copyright (C) 2008 Paul Davis
3 Author: Sampo Savolainen
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
30 #define ISINF(val) !((bool)_finite((double)val))
31 #define ISNAN(val) (bool)_isnan((double)val)
33 #define ISINF(val) std::isinf((val))
34 #define ISNAN(val) std::isnan((val))
37 #include <gtkmm/box.h>
38 #include <gtkmm/button.h>
39 #include <gtkmm/checkbutton.h>
41 #include "ardour/audio_buffer.h"
42 #include "ardour/data_type.h"
43 #include "ardour/chan_mapping.h"
44 #include "ardour/plugin_insert.h"
45 #include "ardour/session.h"
47 #include "plugin_eq_gui.h"
49 #include "ardour_ui.h"
50 #include "gui_thread.h"
54 using namespace ARDOUR;
56 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
61 , _signal_buffer_size(0)
63 , _signal_input_fft(0)
64 , _signal_output_fft(0)
65 , _plugin_insert(pluginInsert)
67 _signal_analysis_running = false;
68 _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
70 _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
71 _log_max = log10f(1 + _log_coeff);
73 // Setup analysis drawing area
74 _analysis_scale_surface = 0;
76 _analysis_area = new Gtk::DrawingArea();
77 _analysis_width = 256.0;
78 _analysis_height = 256.0;
79 _analysis_area->set_size_request(_analysis_width, _analysis_height);
81 _analysis_area->add_events(Gdk::POINTER_MOTION_MASK | Gdk::LEAVE_NOTIFY_MASK | Gdk::BUTTON_PRESS_MASK);
83 _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
84 _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
85 _analysis_area->signal_motion_notify_event().connect( sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseover));
86 _analysis_area->signal_leave_notify_event().connect( sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseexit));
87 _analysis_area->signal_button_press_event().connect( sigc::mem_fun (*this, &PluginEqGui::analysis_area_mousedown));
90 dBScaleModel = Gtk::ListStore::create(dBColumns);
92 dBScaleCombo = new Gtk::ComboBox (dBScaleModel, false);
93 dBScaleCombo->set_title (_("dB scale"));
95 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
97 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
98 row[dBColumns.dBMin] = (MIN); \
99 row[dBColumns.dBMax] = (MAX); \
100 row[dBColumns.dBStep] = (STEP); \
101 row[dBColumns.name] = NAME; \
104 ADD_DB_ROW( -6, +6, 1, "-6dB .. +6dB");
105 ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
106 ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
107 ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
108 ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
112 dBScaleCombo -> pack_start(dBColumns.name);
113 dBScaleCombo -> set_active(1);
115 dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
117 Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
119 Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
120 dBSelectBin->add( *manage(dBComboLabel));
121 dBSelectBin->add( *manage(dBScaleCombo));
124 _phase_button = new Gtk::CheckButton (_("Show phase"));
125 _phase_button->set_active(true);
126 _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
128 // Freq/dB info for mouse over
129 _pointer_info = new Gtk::Label ("", 1, 0.5);
130 _pointer_info->set_size_request(_analysis_width / 4, -1);
131 _pointer_info->set_name("PluginAnalysisInfoLabel");
134 attach( *manage(_analysis_area), 1, 4, 1, 2);
135 attach( *manage(dBSelectBin), 1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
136 attach( *manage(_phase_button), 2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
137 attach( *manage(_pointer_info), 3, 4, 2, 3, Gtk::FILL, Gtk::SHRINK);
140 PluginEqGui::~PluginEqGui()
144 if (_analysis_scale_surface) {
145 cairo_surface_destroy (_analysis_scale_surface);
150 delete _signal_input_fft;
151 _signal_input_fft = 0;
152 delete _signal_output_fft;
153 _signal_output_fft = 0;
155 // all gui objects are *manage'd by the inherited Table object
159 PluginEqGui::start_listening ()
162 _plugin = _plugin_insert->get_impulse_analysis_plugin();
166 set_buffer_size(4096, 16384);
167 // Connect the realtime signal collection callback
168 _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
172 PluginEqGui::stop_listening ()
174 analysis_connection.disconnect ();
175 _plugin->deactivate ();
179 PluginEqGui::on_hide()
182 Gtk::Table::on_hide();
186 PluginEqGui::stop_updating()
188 if (_update_connection.connected()) {
189 _update_connection.disconnect();
194 PluginEqGui::start_updating()
196 if (!_update_connection.connected() && is_visible()) {
197 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
202 PluginEqGui::on_show()
204 Gtk::Table::on_show();
208 Gtk::Widget *toplevel = get_toplevel();
210 if (!_window_unmap_connection.connected()) {
211 _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
214 if (!_window_map_connection.connected()) {
215 _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
221 PluginEqGui::change_dB_scale()
223 Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
225 Gtk::TreeModel::Row row;
227 if(iter && (row = *iter)) {
228 _min_dB = row[dBColumns.dBMin];
229 _max_dB = row[dBColumns.dBMax];
230 _step_dB = row[dBColumns.dBStep];
238 PluginEqGui::redraw_scales()
241 if (_analysis_scale_surface) {
242 cairo_surface_destroy (_analysis_scale_surface);
243 _analysis_scale_surface = 0;
246 _analysis_area->queue_draw();
248 // TODO: Add graph legend!
252 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
254 if (_buffer_size == size && _signal_buffer_size == signal_size) {
258 GTKArdour::FFT *tmp1 = _impulse_fft;
259 GTKArdour::FFT *tmp2 = _signal_input_fft;
260 GTKArdour::FFT *tmp3 = _signal_output_fft;
263 _impulse_fft = new GTKArdour::FFT(size);
264 _signal_input_fft = new GTKArdour::FFT(signal_size);
265 _signal_output_fft = new GTKArdour::FFT(signal_size);
267 // Don't care about lost memory, we're screwed anyhow
269 _signal_input_fft = tmp2;
270 _signal_output_fft = tmp3;
279 _signal_buffer_size = signal_size;
281 // allocate separate in+out buffers, VST cannot process in-place
282 ARDOUR::ChanCount acount (_plugin->get_info()->n_inputs + _plugin->get_info()->n_outputs);
283 ARDOUR::ChanCount ccount = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
285 for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
286 _bufferset.ensure_buffers (*i, acount.get (*i), _buffer_size);
287 _collect_bufferset.ensure_buffers (*i, ccount.get (*i), _buffer_size);
290 _bufferset.set_count (acount);
291 _collect_bufferset.set_count (ccount);
295 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
297 _analysis_width = (float)size.get_width();
298 _analysis_height = (float)size.get_height();
300 if (_analysis_scale_surface) {
301 cairo_surface_destroy (_analysis_scale_surface);
302 _analysis_scale_surface = 0;
305 _pointer_info->set_size_request(_analysis_width / 4, -1);
309 PluginEqGui::timeout_callback()
311 if (!_signal_analysis_running) {
312 _signal_analysis_running = true;
313 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
315 run_impulse_analysis();
321 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
323 ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out);
325 _signal_input_fft ->reset();
326 _signal_output_fft->reset();
328 for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
329 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
332 for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
333 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
336 _signal_input_fft ->calculate();
337 _signal_output_fft->calculate();
339 _signal_analysis_running = false;
341 // This signals calls expose_analysis_area()
342 _analysis_area->queue_draw();
346 PluginEqGui::run_impulse_analysis()
348 /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
349 ARDOUR_UI::instance()->get_process_buffers ();
351 uint32_t inputs = _plugin->get_info()->n_inputs.n_audio();
352 uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
354 // Create the impulse, can't use silence() because consecutive calls won't work
355 for (uint32_t i = 0; i < inputs; ++i) {
356 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
357 ARDOUR::Sample* d = buf.data();
358 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
362 ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
363 ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
364 // map output buffers after input buffers (no inplace for VST)
365 out_map.offset_to (DataType::AUDIO, inputs);
367 _plugin->set_block_size (_buffer_size);
368 _plugin->connect_and_run(_bufferset, 0, _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
369 framecnt_t f = _plugin->signal_latency ();
370 // Adding user_latency() could be interesting
372 // Gather all output, taking latency into account.
373 _impulse_fft->reset();
375 // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
376 for (uint32_t i = 0; i < outputs; ++i) {
377 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
378 ARDOUR::Sample *d = buf.data();
379 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
383 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
384 for (uint32_t i = 0; i < outputs; ++i) {
385 memcpy(_collect_bufferset.get_audio(i).data(),
386 _bufferset.get_audio(inputs + i).data(), _buffer_size * sizeof(float));
390 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
391 framecnt_t target_offset = 0;
392 framecnt_t frames_left = _buffer_size; // refaktoroi
394 if (f >= _buffer_size) {
395 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
396 // there is no data in this buffer regarding to the input!
399 // this buffer contains either the first, last or a whole bu the output of the impulse
400 // first part: offset is 0, so we copy to the start of _collect_bufferset
401 // we start at output offset "f"
402 // .. and copy "buffer size" - "f" - "offset" frames
404 framecnt_t length = _buffer_size - f - target_offset;
406 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
407 for (uint32_t i = 0; i < outputs; ++i) {
408 memcpy(_collect_bufferset.get_audio(i).data(target_offset),
409 _bufferset.get_audio(inputs + i).data() + f,
410 length * sizeof(float));
413 target_offset += length;
414 frames_left -= length;
417 if (frames_left > 0) {
418 // Silence the buffers
419 for (uint32_t i = 0; i < inputs; ++i) {
420 ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
421 ARDOUR::Sample *d = buf.data();
422 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
425 _plugin->connect_and_run (_bufferset, target_offset, target_offset + _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
427 } while ( frames_left > 0);
432 for (uint32_t i = 0; i < outputs; ++i) {
433 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
436 // normalize the output
437 _impulse_fft->calculate();
439 // This signals calls expose_analysis_area()
440 _analysis_area->queue_draw();
442 ARDOUR_UI::instance()->drop_process_buffers ();
446 PluginEqGui::update_pointer_info(float x, float y)
448 const int freq = std::max(1, (int) roundf((powf(10, x / _analysis_width * _log_max) - 1) * _samplerate / 2.0 / _log_coeff));
449 const float dB = _max_dB - y / _analysis_height * ( _max_dB - _min_dB );
450 std::stringstream ss;
453 ss << std::setprecision (1) << freq / 1000.0 << "kHz";
454 } else if (freq >= 1000) {
455 ss << std::setprecision (2) << freq / 1000.0 << "kHz";
457 ss << std::setprecision (0) << freq << "Hz";
459 ss << " " << std::setw(5) << std::setprecision (1) << std::showpos << dB;
460 ss << std::setw(0) << "dB";
461 _pointer_info->set_text(ss.str());
465 PluginEqGui::analysis_area_mouseover(GdkEventMotion *event)
467 update_pointer_info(event->x, event->y);
472 PluginEqGui::analysis_area_mouseexit(GdkEventCrossing *)
474 _pointer_info->set_text("");
479 PluginEqGui::analysis_area_mousedown(GdkEventButton *event)
481 update_pointer_info(event->x, event->y);
487 PluginEqGui::expose_analysis_area(GdkEventExpose *)
489 redraw_analysis_area();
494 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
496 // TODO: check whether we need rounding
497 _analysis_scale_surface = cairo_surface_create_similar (cairo_get_target(ref_cr),
502 cairo_t *cr = cairo_create (_analysis_scale_surface);
504 cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
505 cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
509 draw_scales_power(_analysis_area, cr);
510 if (_phase_button->get_active()) {
511 draw_scales_phase(_analysis_area, cr);
518 PluginEqGui::redraw_analysis_area()
522 cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
524 if (_analysis_scale_surface == 0) {
525 draw_analysis_scales(cr);
530 cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
533 if (_phase_button->get_active()) {
534 plot_impulse_phase(_analysis_area, cr);
536 plot_impulse_amplitude(_analysis_area, cr);
538 // TODO: make this optional
539 plot_signal_amplitude_difference(_analysis_area, cr);
544 #define PHASE_PROPORTION 0.5
547 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
550 cairo_font_extents_t extents;
551 cairo_font_extents(cr, &extents);
554 cairo_text_extents_t t_ext;
556 for (uint32_t i = 0; i < 3; i++) {
558 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
560 cairo_set_source_rgb(cr, .8, .9, 0.2);
562 snprintf(buf,256, "0\u00b0");
564 snprintf(buf,256, "%d\u00b0", (i * 45));
566 cairo_text_extents(cr, buf, &t_ext);
567 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
568 cairo_show_text(cr, buf);
574 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
575 cairo_move_to(cr, 0.0, y);
576 cairo_line_to(cr, _analysis_width, y);
579 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
582 snprintf(buf,256, "-%d\u00b0", (i * 45));
583 cairo_set_source_rgb(cr, .8, .9, 0.2);
584 cairo_text_extents(cr, buf, &t_ext);
585 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
586 cairo_show_text(cr, buf);
589 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
590 cairo_move_to(cr, 0.0, y);
591 cairo_line_to(cr, _analysis_width, y);
593 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
599 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
607 // float width = w->get_width();
608 float height = w->get_height();
610 cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
611 for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
612 // x coordinate of bin i
613 x = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
614 x *= _analysis_width;
616 y = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
619 cairo_move_to(cr, x, y);
623 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
624 avgY = avgY/(float)avgNum;
625 if (avgY > (height * 10.0) ) avgY = height * 10.0;
626 if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
627 cairo_line_to(cr, prevX, avgY);
628 //cairo_line_to(cr, prevX, avgY/(float)avgNum);
640 cairo_set_line_width (cr, 2.0);
645 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
647 if (_impulse_fft == 0) {
651 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 };
652 float divisor = _samplerate / 2.0 / _impulse_fft->bins();
655 cairo_set_line_width (cr, 1.5);
656 cairo_set_font_size(cr, 9);
658 cairo_font_extents_t extents;
659 cairo_font_extents(cr, &extents);
660 // float fontXOffset = extents.descent + 1.0;
664 for (uint32_t i = 0; scales[i] != -1.0; ++i) {
665 float bin = scales[i] / divisor;
667 x = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
668 x *= _analysis_width;
670 if (scales[i] < 1000.0) {
671 snprintf(buf, 256, "%0.0f", scales[i]);
673 snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
676 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
678 //cairo_move_to(cr, x + fontXOffset, 3.0);
679 cairo_move_to(cr, x - extents.height, 3.0);
681 cairo_rotate(cr, M_PI / 2.0);
682 cairo_show_text(cr, buf);
683 cairo_rotate(cr, -M_PI / 2.0);
686 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
687 cairo_move_to(cr, x, _analysis_height);
688 cairo_line_to(cr, x, 0.0);
694 //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
695 double dashes[] = { 3.0, 5.0 };
697 for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
698 snprintf(buf, 256, "+%0.0f", dB );
700 y = ( _max_dB - dB) / ( _max_dB - _min_dB );
701 //std::cerr << " y = " << y << std::endl;
702 y *= _analysis_height;
705 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
706 cairo_move_to(cr, 1.0, y + extents.height + 1.0);
707 cairo_show_text(cr, buf);
711 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
712 cairo_move_to(cr, 0, y);
713 cairo_line_to(cr, _analysis_width, y);
717 cairo_set_dash(cr, dashes, 2, 0.0);
723 for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
724 snprintf(buf, 256, "%0.0f", dB );
726 y = ( _max_dB - dB) / ( _max_dB - _min_dB );
727 y *= _analysis_height;
729 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
730 cairo_move_to(cr, 1.0, y - extents.descent - 1.0);
731 cairo_show_text(cr, buf);
734 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
735 cairo_move_to(cr, 0, y);
736 cairo_line_to(cr, _analysis_width, y);
740 cairo_set_dash(cr, 0, 0, 0.0);
747 return 10.0 * log10f(a);
751 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
758 // float width = w->get_width();
759 float height = w->get_height();
761 cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
762 cairo_set_line_width (cr, 2.5);
764 for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
765 // x coordinate of bin i
766 x = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
767 x *= _analysis_width;
769 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
771 y = _analysis_height - _analysis_height*yCoeff;
774 cairo_move_to(cr, x, y);
778 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
779 avgY = avgY/(float)avgNum;
780 if (avgY > (height * 10.0) ) avgY = height * 10.0;
781 if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
782 cairo_line_to(cr, prevX, avgY);
783 //cairo_line_to(cr, prevX, avgY/(float)avgNum);
799 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
807 // float width = w->get_width();
808 float height = w->get_height();
810 cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
811 cairo_set_line_width (cr, 1.5);
813 for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
814 // x coordinate of bin i
815 x = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
816 x *= _analysis_width;
818 float power_out = _signal_output_fft->power_at_bin (i) + 1e-30;
819 float power_in = _signal_input_fft ->power_at_bin (i) + 1e-30;
820 float power = power_to_dB (power_out / power_in);
822 assert (!ISINF(power));
823 assert (!ISNAN(power));
825 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
827 y = _analysis_height - _analysis_height*yCoeff;
830 cairo_move_to(cr, x, y);
834 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
835 avgY = avgY/(float)avgNum;
836 if (avgY > (height * 10.0) ) avgY = height * 10.0;
837 if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
838 cairo_line_to(cr, prevX, avgY);