2 * Copyright (C) 2018 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2008 Paul Davis
4 * Original Author: Sampo Savolainen
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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)
62 , _signal_buffer_size (0)
64 , _signal_input_fft (0)
65 , _signal_output_fft (0)
66 , _plugin_insert (pluginInsert)
67 , _pointer_in_area_xpos (-1)
69 _signal_analysis_running = false;
70 _samplerate = ARDOUR_UI::instance()->the_session()->sample_rate();
72 _log_coeff = (1.0 - 2.0 * (1000.0 / (_samplerate / 2.0))) / powf (1000.0 / (_samplerate / 2.0), 2.0);
73 _log_max = log10f (1 + _log_coeff);
75 // Setup analysis drawing area
76 _analysis_scale_surface = 0;
78 _analysis_area = new Gtk::DrawingArea();
79 _analysis_width = 256.0;
80 _analysis_height = 256.0;
81 _analysis_area->set_size_request (_analysis_width, _analysis_height);
83 _analysis_area->add_events (Gdk::POINTER_MOTION_MASK | Gdk::LEAVE_NOTIFY_MASK | Gdk::BUTTON_PRESS_MASK);
85 _analysis_area->signal_expose_event().connect (sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
86 _analysis_area->signal_size_allocate().connect (sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
87 _analysis_area->signal_motion_notify_event().connect (sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseover));
88 _analysis_area->signal_leave_notify_event().connect (sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseexit));
91 dBScaleModel = Gtk::ListStore::create (dBColumns);
93 dBScaleCombo = new Gtk::ComboBox (dBScaleModel, false);
94 dBScaleCombo->set_title (_("dB scale"));
96 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
98 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
99 row[dBColumns.dBMin] = (MIN); \
100 row[dBColumns.dBMax] = (MAX); \
101 row[dBColumns.dBStep] = (STEP); \
102 row[dBColumns.name] = NAME; \
105 ADD_DB_ROW( -6, +6, 1, "-6dB .. +6dB");
106 ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
107 ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
108 ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
109 ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
113 dBScaleCombo -> pack_start(dBColumns.name);
114 dBScaleCombo -> set_active(1);
116 dBScaleCombo -> signal_changed().connect (sigc::mem_fun(*this, &PluginEqGui::change_dB_scale));
118 Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
120 Gtk::HBox *dBSelectBin = new Gtk::HBox (false, 5);
121 dBSelectBin->add (*manage(dBComboLabel));
122 dBSelectBin->add (*manage(dBScaleCombo));
125 _signal_button = new Gtk::CheckButton (_("Plot live signal"));
126 _signal_button->set_active(true);
129 _phase_button = new Gtk::CheckButton (_("Show phase"));
130 _phase_button->set_active (true);
131 _phase_button->signal_toggled().connect (sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
133 // Freq/dB info for mouse over
134 _pointer_info = new Gtk::Label ("", 1, 0.5);
135 _pointer_info->set_size_request (_analysis_width / 4, -1);
136 _pointer_info->set_name ("PluginAnalysisInfoLabel");
139 attach (*manage(_analysis_area), 0, 4, 0, 1);
140 attach (*manage(dBSelectBin), 0, 1, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
141 attach (*manage(_signal_button), 1, 2, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
142 attach (*manage(_phase_button), 2, 3, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
143 attach (*manage(_pointer_info), 3, 4, 1, 2, Gtk::FILL, Gtk::SHRINK);
146 PluginEqGui::~PluginEqGui ()
150 if (_analysis_scale_surface) {
151 cairo_surface_destroy (_analysis_scale_surface);
156 delete _signal_input_fft;
157 _signal_input_fft = 0;
158 delete _signal_output_fft;
159 _signal_output_fft = 0;
161 // all gui objects are *manage'd by the inherited Table object
165 power_to_dB (float a)
167 return 10.0 * log10f (a);
171 PluginEqGui::start_listening ()
174 _plugin = _plugin_insert->get_impulse_analysis_plugin ();
177 _plugin->activate ();
178 set_buffer_size (8192, 16384);
179 _block_size = 0; // re-initialize the plugin next time.
181 /* Connect the realtime signal collection callback */
182 _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
186 PluginEqGui::stop_listening ()
188 analysis_connection.disconnect ();
189 _plugin->deactivate ();
193 PluginEqGui::on_hide ()
196 Gtk::Table::on_hide ();
200 PluginEqGui::stop_updating ()
202 if (_update_connection.connected ()) {
203 _update_connection.disconnect ();
208 PluginEqGui::start_updating ()
210 if (!_update_connection.connected() && is_visible()) {
211 _update_connection = Glib::signal_timeout().connect (sigc::mem_fun (this, &PluginEqGui::timeout_callback), 250);
216 PluginEqGui::on_show ()
218 Gtk::Table::on_show ();
222 Gtk::Widget *toplevel = get_toplevel ();
224 if (!_window_unmap_connection.connected ()) {
225 _window_unmap_connection = toplevel->signal_unmap().connect (sigc::mem_fun (this, &PluginEqGui::stop_updating));
228 if (!_window_map_connection.connected ()) {
229 _window_map_connection = toplevel->signal_map().connect (sigc::mem_fun (this, &PluginEqGui::start_updating));
235 PluginEqGui::change_dB_scale ()
237 Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active ();
239 Gtk::TreeModel::Row row;
241 if (iter && (row = *iter)) {
242 _min_dB = row[dBColumns.dBMin];
243 _max_dB = row[dBColumns.dBMax];
244 _step_dB = row[dBColumns.dBStep];
251 PluginEqGui::redraw_scales ()
254 if (_analysis_scale_surface) {
255 cairo_surface_destroy (_analysis_scale_surface);
256 _analysis_scale_surface = 0;
259 _analysis_area->queue_draw ();
261 // TODO: Add graph legend!
265 PluginEqGui::set_buffer_size (uint32_t size, uint32_t signal_size)
267 if (_buffer_size == size && _signal_buffer_size == signal_size) {
271 GTKArdour::FFT *tmp1 = _impulse_fft;
272 GTKArdour::FFT *tmp2 = _signal_input_fft;
273 GTKArdour::FFT *tmp3 = _signal_output_fft;
276 _impulse_fft = new GTKArdour::FFT (size);
277 _signal_input_fft = new GTKArdour::FFT (signal_size);
278 _signal_output_fft = new GTKArdour::FFT (signal_size);
280 // Don't care about lost memory, we're screwed anyhow
282 _signal_input_fft = tmp2;
283 _signal_output_fft = tmp3;
292 _signal_buffer_size = signal_size;
294 /* allocate separate in+out buffers, VST cannot process in-place */
295 ARDOUR::ChanCount acount (_plugin->get_info()->n_inputs + _plugin->get_info()->n_outputs);
296 ARDOUR::ChanCount ccount = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
298 for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
299 _bufferset.ensure_buffers (*i, acount.get (*i), _buffer_size);
300 _collect_bufferset.ensure_buffers (*i, ccount.get (*i), _buffer_size);
303 _bufferset.set_count (acount);
304 _collect_bufferset.set_count (ccount);
308 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
310 _analysis_width = (float)size.get_width();
311 _analysis_height = (float)size.get_height();
313 if (_analysis_scale_surface) {
314 cairo_surface_destroy (_analysis_scale_surface);
315 _analysis_scale_surface = 0;
318 _pointer_info->set_size_request (_analysis_width / 4, -1);
322 PluginEqGui::timeout_callback ()
324 if (!_signal_analysis_running) {
325 _signal_analysis_running = true;
326 _plugin_insert -> collect_signal_for_analysis (_signal_buffer_size);
329 run_impulse_analysis ();
334 PluginEqGui::signal_collect_callback (ARDOUR::BufferSet* in, ARDOUR::BufferSet* out)
336 ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out);
338 _signal_input_fft ->reset ();
339 _signal_output_fft->reset ();
341 for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
342 _signal_input_fft ->analyze (in ->get_audio (i).data(), GTKArdour::FFT::HANN);
345 for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
346 _signal_output_fft->analyze (out->get_audio (i).data(), GTKArdour::FFT::HANN);
349 _signal_input_fft ->calculate ();
350 _signal_output_fft->calculate ();
352 _signal_analysis_running = false;
353 _analysis_area->queue_draw ();
357 PluginEqGui::run_impulse_analysis ()
359 /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
360 ARDOUR_UI::instance()->get_process_buffers ();
362 uint32_t inputs = _plugin->get_info()->n_inputs.n_audio();
363 uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
365 /* Create the impulse, can't use silence() because consecutive calls won't work */
366 for (uint32_t i = 0; i < inputs; ++i) {
367 ARDOUR::AudioBuffer& buf = _bufferset.get_audio (i);
368 ARDOUR::Sample* d = buf.data ();
369 memset (d, 0, sizeof (ARDOUR::Sample) * _buffer_size);
373 /* Silence collect buffers to copy data to */
374 for (uint32_t i = 0; i < outputs; ++i) {
375 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio (i);
376 ARDOUR::Sample *d = buf.data ();
377 memset (d, 0, sizeof (ARDOUR::Sample) * _buffer_size);
380 /* create default linear I/O maps */
381 ARDOUR::ChanMapping in_map (_plugin->get_info()->n_inputs);
382 ARDOUR::ChanMapping out_map (_plugin->get_info()->n_outputs);
383 /* map output buffers after input buffers (no inplace for VST) */
384 out_map.offset_to (DataType::AUDIO, inputs);
386 /* run at most at session's block size chunks.
388 * This is important since VSTs may call audioMasterGetBlockSize
389 * or access various other /real/ session paramaters using the
390 * audioMasterCallback
392 samplecnt_t block_size = ARDOUR_UI::instance()->the_session()->get_block_size();
393 if (_block_size != block_size) {
394 _block_size = block_size;
395 _plugin->set_block_size (block_size);
398 samplepos_t sample_pos = 0;
399 samplecnt_t latency = _plugin->signal_latency ();
400 samplecnt_t samples_remain = _buffer_size + latency;
402 _impulse_fft->reset ();
404 while (samples_remain > 0) {
406 samplecnt_t n_samples = std::min (samples_remain, block_size);
407 _plugin->connect_and_run (_bufferset, sample_pos, sample_pos + n_samples, 1.0, in_map, out_map, n_samples, 0);
408 samples_remain -= n_samples;
410 /* zero input buffers */
411 if (sample_pos == 0 && samples_remain > 0) {
412 for (uint32_t i = 0; i < inputs; ++i) {
413 _bufferset.get_audio (i).data()[0] = 0.f;
418 if (samples_remain > 0) {
419 for (uint32_t i = 0; i < inputs; ++i) {
421 assert (_bufferset.get_audio (i).check_silence (block_size, unused));
426 if (sample_pos + n_samples > latency) {
427 samplecnt_t dst_off = sample_pos >= latency ? sample_pos - latency : 0;
428 samplecnt_t src_off = sample_pos >= latency ? 0 : latency - sample_pos;
429 samplecnt_t n_copy = std::min (n_samples, sample_pos + n_samples - latency);
431 assert (dst_off + n_copy <= _buffer_size);
432 assert (src_off + n_copy <= _block_size);
434 for (uint32_t i = 0; i < outputs; ++i) {
436 &(_collect_bufferset.get_audio (i).data()[dst_off]),
437 &(_bufferset.get_audio (inputs + i).data()[src_off]),
438 n_copy * sizeof (float));
442 sample_pos += n_samples;
445 for (uint32_t i = 0; i < outputs; ++i) {
446 _impulse_fft->analyze (_collect_bufferset.get_audio (i).data());
448 _impulse_fft->calculate ();
450 _analysis_area->queue_draw ();
452 ARDOUR_UI::instance ()->drop_process_buffers ();
456 PluginEqGui::update_pointer_info( float x)
458 /* find the bin corresponding to x (see plot_impulse_amplitude) */
459 int i = roundf ((powf (10, _log_max * x / _analysis_width) - 1.0) * _impulse_fft->bins() / _log_coeff);
460 float dB = power_to_dB (_impulse_fft->power_at_bin (i));
461 /* calc freq corresponding to bin */
462 const int freq = std::max (1, (int) roundf ((float)i / (float)_impulse_fft->bins() * _samplerate / 2.f));
464 _pointer_in_area_freq = round (_analysis_width * log10f (1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max);
466 std::stringstream ss;
469 ss << std::setprecision (1) << freq / 1000.0 << "kHz";
470 } else if (freq >= 1000) {
471 ss << std::setprecision (2) << freq / 1000.0 << "kHz";
473 ss << std::setprecision (0) << freq << "Hz";
475 ss << " " << std::setw (6) << std::setprecision (1) << std::showpos << dB;
476 ss << std::setw (0) << "dB";
478 if (_phase_button->get_active ()) {
479 float phase = 180. * _impulse_fft->phase_at_bin (i) / M_PI;
480 ss << " " << std::setw (6) << std::setprecision (1) << std::showpos << phase;
481 ss << std::setw (0) << "\u00B0";
483 _pointer_info->set_text (ss.str());
487 PluginEqGui::analysis_area_mouseover (GdkEventMotion *event)
489 update_pointer_info (event->x);
490 _pointer_in_area_xpos = event->x;
491 _analysis_area->queue_draw ();
496 PluginEqGui::analysis_area_mouseexit (GdkEventCrossing *)
498 _pointer_info->set_text ("");
499 _pointer_in_area_xpos = -1;
500 _analysis_area->queue_draw ();
505 PluginEqGui::expose_analysis_area (GdkEventExpose *)
507 redraw_analysis_area ();
512 PluginEqGui::draw_analysis_scales (cairo_t *ref_cr)
514 // TODO: check whether we need rounding
515 _analysis_scale_surface = cairo_surface_create_similar (cairo_get_target (ref_cr),
520 cairo_t *cr = cairo_create (_analysis_scale_surface);
522 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
523 cairo_rectangle (cr, 0.0, 0.0, _analysis_width, _analysis_height);
526 draw_scales_power (_analysis_area, cr);
528 if (_phase_button->get_active ()) {
529 draw_scales_phase (_analysis_area, cr);
536 PluginEqGui::redraw_analysis_area ()
540 cr = gdk_cairo_create (GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
542 if (_analysis_scale_surface == 0) {
543 draw_analysis_scales (cr);
546 cairo_copy_page (cr);
548 cairo_set_source_surface (cr, _analysis_scale_surface, 0.0, 0.0);
551 cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
553 if (_phase_button->get_active()) {
554 plot_impulse_phase (_analysis_area, cr);
557 plot_impulse_amplitude (_analysis_area, cr);
559 if (_pointer_in_area_xpos >= 0) {
560 update_pointer_info (_pointer_in_area_xpos);
563 if (_signal_button->get_active()) {
564 plot_signal_amplitude_difference (_analysis_area, cr);
567 if (_pointer_in_area_xpos >= 0 && _pointer_in_area_freq > 0) {
568 const double dashed[] = {0.0, 2.0};
569 cairo_set_dash (cr, dashed, 2, 0);
570 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
571 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
572 cairo_set_line_width (cr, 1.0);
573 cairo_move_to (cr, _pointer_in_area_freq - .5, -.5);
574 cairo_line_to (cr, _pointer_in_area_freq - .5, _analysis_height - .5);
581 #define PHASE_PROPORTION 0.5
584 PluginEqGui::draw_scales_phase (Gtk::Widget*, cairo_t *cr)
587 cairo_font_extents_t extents;
588 cairo_font_extents (cr, &extents);
591 cairo_text_extents_t t_ext;
593 for (uint32_t i = 0; i < 3; i++) {
595 y = _analysis_height / 2.0 - (float)i * (_analysis_height / 8.0) * PHASE_PROPORTION;
597 cairo_set_source_rgb (cr, .8, .9, 0.2);
599 snprintf (buf,256, "0\u00b0");
601 snprintf (buf,256, "%d\u00b0", (i * 45));
603 cairo_text_extents (cr, buf, &t_ext);
604 cairo_move_to (cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
605 cairo_show_text (cr, buf);
611 cairo_set_source_rgba (cr, .8, .9, 0.2, 0.6 / (float)i);
612 cairo_move_to (cr, 0.0, y);
613 cairo_line_to (cr, _analysis_width, y);
616 y = _analysis_height / 2.0 + (float)i * (_analysis_height / 8.0) * PHASE_PROPORTION;
619 snprintf (buf,256, "-%d\u00b0", (i * 45));
620 cairo_set_source_rgb (cr, .8, .9, 0.2);
621 cairo_text_extents (cr, buf, &t_ext);
622 cairo_move_to (cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
623 cairo_show_text (cr, buf);
626 cairo_set_source_rgba (cr, .8, .9, 0.2, 0.6 / (float)i);
627 cairo_move_to (cr, 0.0, y);
628 cairo_line_to (cr, _analysis_width, y);
630 cairo_set_line_width (cr, 0.25 + 1.0 / (float)(i + 1));
636 PluginEqGui::plot_impulse_phase (Gtk::Widget *w, cairo_t *cr)
644 // float width = w->get_width();
645 float height = w->get_height ();
647 cairo_set_source_rgba (cr, 0.95, 0.3, 0.2, 1.0);
648 for (uint32_t i = 0; i < _impulse_fft->bins() - 1; ++i) {
649 // x coordinate of bin i
650 x = log10f (1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
651 x *= _analysis_width;
653 y = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
655 cairo_move_to (cr, x, y);
658 } else if (rint (x) > prevX || i == _impulse_fft->bins() - 1) {
659 avgY = avgY / (float)avgNum;
660 if (avgY > (height * 10.0)) {
661 avgY = height * 10.0;
663 if (avgY < (-height * 10.0)) {
664 avgY = -height * 10.0;
667 cairo_line_to (cr, prevX, avgY);
678 cairo_set_line_width (cr, 2.0);
683 PluginEqGui::draw_scales_power (Gtk::Widget */*w*/, cairo_t *cr)
685 if (_impulse_fft == 0) {
689 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 };
690 float divisor = _samplerate / 2.0 / _impulse_fft->bins();
693 cairo_set_line_width (cr, 1.5);
694 cairo_set_font_size (cr, 9);
696 cairo_font_extents_t extents;
697 cairo_font_extents (cr, &extents);
698 // float fontXOffset = extents.descent + 1.0;
702 for (uint32_t i = 0; scales[i] != -1.0; ++i) {
703 float bin = scales[i] / divisor;
705 x = log10f (1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
706 x *= _analysis_width;
708 if (scales[i] < 1000.0) {
709 snprintf (buf, 256, "%0.0f", scales[i]);
711 snprintf (buf, 256, "%0.0fk", scales[i]/1000.0);
714 cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
716 cairo_move_to (cr, x - extents.height, 3.0);
718 cairo_rotate (cr, M_PI / 2.0);
719 cairo_show_text (cr, buf);
720 cairo_rotate (cr, -M_PI / 2.0);
723 cairo_set_source_rgb (cr, 0.3, 0.3, 0.3);
724 cairo_move_to (cr, x, _analysis_height);
725 cairo_line_to (cr, x, 0.0);
731 //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
732 double dashes[] = { 3.0, 5.0 };
734 for (float dB = 0.0; dB < _max_dB; dB += _step_dB) {
735 snprintf (buf, 256, "+%0.0f", dB);
737 y = (_max_dB - dB) / (_max_dB - _min_dB);
738 //std::cerr << " y = " << y << std::endl;
739 y *= _analysis_height;
742 cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
743 cairo_move_to (cr, 1.0, y + extents.height + 1.0);
744 cairo_show_text (cr, buf);
748 cairo_set_source_rgb (cr, 0.2, 0.2, 0.2);
749 cairo_move_to (cr, 0, y);
750 cairo_line_to (cr, _analysis_width, y);
754 cairo_set_dash (cr, dashes, 2, 0.0);
758 for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB) {
759 snprintf (buf, 256, "%0.0f", dB);
761 y = (_max_dB - dB) / (_max_dB - _min_dB);
762 y *= _analysis_height;
764 cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
765 cairo_move_to (cr, 1.0, y - extents.descent - 1.0);
766 cairo_show_text (cr, buf);
769 cairo_set_source_rgb (cr, 0.2, 0.2, 0.2);
770 cairo_move_to (cr, 0, y);
771 cairo_line_to (cr, _analysis_width, y);
775 cairo_set_dash (cr, 0, 0, 0.0);
779 PluginEqGui::plot_impulse_amplitude (Gtk::Widget *w, cairo_t *cr)
786 // float width = w->get_width();
787 float height = w->get_height ();
789 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
790 cairo_set_line_width (cr, 2.5);
792 for (uint32_t i = 0; i < _impulse_fft->bins() - 1; ++i) {
793 // x coordinate of bin i
794 x = log10f (1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
795 x *= _analysis_width;
797 float yCoeff = (power_to_dB (_impulse_fft->power_at_bin (i)) - _min_dB) / (_max_dB - _min_dB);
799 y = _analysis_height - _analysis_height * yCoeff;
802 cairo_move_to (cr, x, y);
805 } else if (rint (x) > prevX || i == _impulse_fft->bins() - 1) {
806 avgY = avgY / (float)avgNum;
807 if (avgY > (height * 10.0)) {
808 avgY = height * 10.0;
810 if (avgY < (-height * 10.0)) {
811 avgY = -height * 10.0;
813 cairo_line_to (cr, prevX, avgY);
828 PluginEqGui::plot_signal_amplitude_difference (Gtk::Widget *w, cairo_t *cr)
836 float height = w->get_height();
838 cairo_set_source_rgb (cr, 0.0, 1.0, 0.0);
839 cairo_set_line_width (cr, 1.5);
841 for (uint32_t i = 0; i < _signal_input_fft->bins() - 1; ++i) {
842 // x coordinate of bin i
843 x = log10f (1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
844 x *= _analysis_width;
846 float power_out = _signal_output_fft->power_at_bin (i) + 1e-30;
847 float power_in = _signal_input_fft ->power_at_bin (i) + 1e-30;
848 float power = power_to_dB (power_out / power_in);
850 assert (!ISINF(power));
851 assert (!ISNAN(power));
853 float yCoeff = (power - _min_dB) / (_max_dB - _min_dB);
855 y = _analysis_height - _analysis_height*yCoeff;
858 cairo_move_to (cr, x, y);
862 } else if (rint (x) > prevX || i == _impulse_fft->bins() - 1) {
863 avgY = avgY / (float)avgNum;
864 if (avgY > (height * 10.0)) {
865 avgY = height * 10.0;
867 if (avgY < (-height * 10.0)) {
868 avgY = -height * 10.0;
870 cairo_line_to (cr, prevX, avgY);