gtk2_ardour/plugin_eq_gui.cc

   1 /*
   2     Copyright (C) 2008 Paul Davis
   3     Author: Sampo Savolainen
   4
   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.
   9
  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.
  14
  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.
  18
  19 */
  20
  21 #include "plugin_eq_gui.h"
  22 #include "fft.h"
  23
  24 #include "ardour_ui.h"
  25 #include "gui_thread.h"
  26 #include "ardour/audio_buffer.h"
  27 #include "ardour/data_type.h"
  28 #include "ardour/chan_mapping.h"
  29 #include "ardour/session.h"
  30
  31 #include <gtkmm/box.h>
  32 #include <gtkmm/button.h>
  33 #include <gtkmm/checkbutton.h>
  34
  35 #include <iostream>
  36 #include <cmath>
  37
  38 using namespace ARDOUR;
  39
  40 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  41         : _min_dB(-12.0)
  42         , _max_dB(+12.0)
  43         , _step_dB(3.0)
  44         , _impulse_fft(0)
  45         , _signal_input_fft(0)
  46         , _signal_output_fft(0)
  47         , _plugin_insert(pluginInsert)
  48 {
  49         _signal_analysis_running = false;
  50         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  51
  52         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  53         _log_max = log10f(1 + _log_coeff);
  54
  55         // Setup analysis drawing area
  56         _analysis_scale_surface = 0;
  57
  58         _analysis_area = new Gtk::DrawingArea();
  59         _analysis_width = 256.0;
  60         _analysis_height = 256.0;
  61         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  62
  63         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  64         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  65
  66         // dB selection
  67         dBScaleModel = Gtk::ListStore::create(dBColumns);
  68
  69         /* this grotty-looking cast allows compilation against gtkmm 2.24.0, which
  70            added a new ComboBox constructor.
  71         */
  72         dBScaleCombo = new Gtk::ComboBox ((Glib::RefPtr<Gtk::TreeModel> &) dBScaleModel);
  73         dBScaleCombo->set_title (_("dB scale"));
  74
  75 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  76         { \
  77                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  78                 row[dBColumns.dBMin]  = (MIN); \
  79                 row[dBColumns.dBMax]  = (MAX); \
  80                 row[dBColumns.dBStep] = (STEP); \
  81                 row[dBColumns.name]   = NAME; \
  82         }
  83
  84         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  85         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
  86         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
  87         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
  88         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
  89
  90 #undef ADD_DB_ROW
  91
  92         dBScaleCombo -> pack_start(dBColumns.name);
  93         dBScaleCombo -> set_active(1);
  94
  95         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
  96
  97         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
  98
  99         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 100         dBSelectBin->add( *manage(dBComboLabel));
 101         dBSelectBin->add( *manage(dBScaleCombo));
 102
 103         // Phase checkbutton
 104         _phase_button = new Gtk::CheckButton (_("Show phase"));
 105         _phase_button->set_active(true);
 106         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 107
 108         // populate table
 109         attach( *manage(_analysis_area), 1, 3, 1, 2);
 110         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 111         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 112 }
 113
 114 PluginEqGui::~PluginEqGui()
 115 {
 116         stop_listening ();
 117
 118         if (_analysis_scale_surface) {
 119                 cairo_surface_destroy (_analysis_scale_surface);
 120         }
 121
 122         delete _impulse_fft;
 123         _impulse_fft = 0;
 124         delete _signal_input_fft;
 125         _signal_input_fft = 0;
 126         delete _signal_output_fft;
 127         _signal_output_fft = 0;
 128
 129         // all gui objects are *manage'd by the inherited Table object
 130 }
 131
 132 void
 133 PluginEqGui::start_listening ()
 134 {
 135         if (!_plugin) {
 136                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 137         }
 138
 139         _plugin->activate();
 140         set_buffer_size(4096, 16384);
 141         // Connect the realtime signal collection callback
 142         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), ui_bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 143 }
 144
 145 void
 146 PluginEqGui::stop_listening ()
 147 {
 148         analysis_connection.disconnect ();
 149         _plugin->deactivate ();
 150 }
 151
 152 void
 153 PluginEqGui::on_hide()
 154 {
 155         stop_updating();
 156         Gtk::Table::on_hide();
 157 }
 158
 159 void
 160 PluginEqGui::stop_updating()
 161 {
 162         if (_update_connection.connected()) {
 163                 _update_connection.disconnect();
 164         }
 165 }
 166
 167 void
 168 PluginEqGui::start_updating()
 169 {
 170         if (!_update_connection.connected() && is_visible()) {
 171                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 172         }
 173 }
 174
 175 void
 176 PluginEqGui::on_show()
 177 {
 178         Gtk::Table::on_show();
 179
 180         start_updating();
 181
 182         Gtk::Widget *toplevel = get_toplevel();
 183         if (toplevel) {
 184                 if (!_window_unmap_connection.connected()) {
 185                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 186                 }
 187
 188                 if (!_window_map_connection.connected()) {
 189                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 190                 }
 191         }
 192 }
 193
 194 void
 195 PluginEqGui::change_dB_scale()
 196 {
 197         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 198
 199         Gtk::TreeModel::Row row;
 200
 201         if(iter && (row = *iter)) {
 202                 _min_dB = row[dBColumns.dBMin];
 203                 _max_dB = row[dBColumns.dBMax];
 204                 _step_dB = row[dBColumns.dBStep];
 205
 206
 207                 redraw_scales();
 208         }
 209 }
 210
 211 void
 212 PluginEqGui::redraw_scales()
 213 {
 214
 215         if (_analysis_scale_surface) {
 216                 cairo_surface_destroy (_analysis_scale_surface);
 217                 _analysis_scale_surface = 0;
 218         }
 219
 220         _analysis_area->queue_draw();
 221
 222         // TODO: Add graph legend!
 223 }
 224
 225 void
 226 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 227 {
 228         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 229                 return;
 230         }
 231
 232         GTKArdour::FFT *tmp1 = _impulse_fft;
 233         GTKArdour::FFT *tmp2 = _signal_input_fft;
 234         GTKArdour::FFT *tmp3 = _signal_output_fft;
 235
 236         try {
 237                 _impulse_fft       = new GTKArdour::FFT(size);
 238                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 239                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 240         } catch( ... ) {
 241                 // Don't care about lost memory, we're screwed anyhow
 242                 _impulse_fft       = tmp1;
 243                 _signal_input_fft  = tmp2;
 244                 _signal_output_fft = tmp3;
 245                 throw;
 246         }
 247
 248         delete tmp1;
 249         delete tmp2;
 250         delete tmp3;
 251
 252         _buffer_size = size;
 253         _signal_buffer_size = signal_size;
 254
 255         ARDOUR::ChanCount count = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 256
 257         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 258                 _bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 259                 _collect_bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 260         }
 261
 262         _bufferset.set_count (count);
 263         _collect_bufferset.set_count (count);
 264 }
 265
 266 void
 267 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 268 {
 269         _analysis_width  = (float)size.get_width();
 270         _analysis_height = (float)size.get_height();
 271
 272         if (_analysis_scale_surface) {
 273                 cairo_surface_destroy (_analysis_scale_surface);
 274                 _analysis_scale_surface = 0;
 275         }
 276 }
 277
 278 bool
 279 PluginEqGui::timeout_callback()
 280 {
 281         if (!_signal_analysis_running) {
 282                 _signal_analysis_running = true;
 283                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 284         }
 285         run_impulse_analysis();
 286
 287         return true;
 288 }
 289
 290 void
 291 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 292 {
 293         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out)
 294
 295         _signal_input_fft ->reset();
 296         _signal_output_fft->reset();
 297
 298         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 299                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 300         }
 301
 302         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 303                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 304         }
 305
 306         _signal_input_fft ->calculate();
 307         _signal_output_fft->calculate();
 308
 309         _signal_analysis_running = false;
 310
 311         // This signals calls expose_analysis_area()
 312         _analysis_area->queue_draw();
 313 }
 314
 315 void
 316 PluginEqGui::run_impulse_analysis()
 317 {
 318         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 319         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 320
 321         // Create the impulse, can't use silence() because consecutive calls won't work
 322         for (uint32_t i = 0; i < inputs; ++i) {
 323                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 324                 ARDOUR::Sample* d = buf.data();
 325                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 326                 *d = 1.0;
 327         }
 328
 329         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 330         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 331
 332         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 333         framecnt_t f = _plugin->signal_latency ();
 334         // Adding user_latency() could be interesting
 335
 336         // Gather all output, taking latency into account.
 337         _impulse_fft->reset();
 338
 339         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 340         for (uint32_t i = 0; i < outputs; ++i) {
 341                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 342                 ARDOUR::Sample *d = buf.data();
 343                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 344         }
 345
 346         if (f == 0) {
 347                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 348                 for (uint32_t i = 0; i < outputs; ++i) {
 349                         memcpy(_collect_bufferset.get_audio(i).data(),
 350                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 351                 }
 352         } else {
 353                 //int C = 0;
 354                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 355                 framecnt_t target_offset = 0;
 356                 framecnt_t frames_left = _buffer_size; // refaktoroi
 357                 do {
 358                         if (f >= _buffer_size) {
 359                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 360                                 // there is no data in this buffer regarding to the input!
 361                                 f -= _buffer_size;
 362                         } else {
 363                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 364                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 365                                 //             we start at output offset "f"
 366                                 //             .. and copy "buffer size" - "f" - "offset" frames
 367
 368                                 framecnt_t length = _buffer_size - f - target_offset;
 369
 370                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 371                                 for (uint32_t i = 0; i < outputs; ++i) {
 372                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 373                                                 _bufferset.get_audio(i).data() + f,
 374                                                 length * sizeof(float));
 375                                 }
 376
 377                                 target_offset += length;
 378                                 frames_left   -= length;
 379                                 f = 0;
 380                         }
 381                         if (frames_left > 0) {
 382                                 // Silence the buffers
 383                                 for (uint32_t i = 0; i < inputs; ++i) {
 384                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 385                                         ARDOUR::Sample *d = buf.data();
 386                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 387                                 }
 388
 389                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 390                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 391                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 392                         }
 393                 } while ( frames_left > 0);
 394
 395         }
 396
 397
 398         for (uint32_t i = 0; i < outputs; ++i) {
 399                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 400         }
 401
 402         // normalize the output
 403         _impulse_fft->calculate();
 404
 405         // This signals calls expose_analysis_area()
 406         _analysis_area->queue_draw();
 407 }
 408
 409 bool
 410 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 411 {
 412         redraw_analysis_area();
 413         return true;
 414 }
 415
 416 void
 417 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 418 {
 419         // TODO: check whether we need rounding
 420         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 421                                                              CAIRO_CONTENT_COLOR,
 422                                                              _analysis_width,
 423                                                              _analysis_height);
 424
 425         cairo_t *cr = cairo_create (_analysis_scale_surface);
 426
 427         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 428         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 429         cairo_fill(cr);
 430
 431
 432         draw_scales_power(_analysis_area, cr);
 433         if (_phase_button->get_active()) {
 434                 draw_scales_phase(_analysis_area, cr);
 435         }
 436
 437         cairo_destroy(cr);
 438
 439 }
 440
 441 void
 442 PluginEqGui::redraw_analysis_area()
 443 {
 444         cairo_t *cr;
 445
 446         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 447
 448         if (_analysis_scale_surface == 0) {
 449                 draw_analysis_scales(cr);
 450         }
 451
 452
 453         cairo_copy_page(cr);
 454
 455         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 456         cairo_paint(cr);
 457
 458         if (_phase_button->get_active()) {
 459                 plot_impulse_phase(_analysis_area, cr);
 460         }
 461         plot_impulse_amplitude(_analysis_area, cr);
 462
 463         // TODO: make this optional
 464         plot_signal_amplitude_difference(_analysis_area, cr);
 465
 466         cairo_destroy(cr);
 467
 468
 469 }
 470
 471 #define PHASE_PROPORTION 0.5
 472
 473 void
 474 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 475 {
 476         float y;
 477         cairo_font_extents_t extents;
 478         cairo_font_extents(cr, &extents);
 479
 480         char buf[256];
 481         cairo_text_extents_t t_ext;
 482
 483         for (uint32_t i = 0; i < 3; i++) {
 484
 485                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 486
 487                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 488                 if (i == 0) {
 489                         snprintf(buf,256, "0\u00b0");
 490                 } else {
 491                         snprintf(buf,256, "%d\u00b0", (i * 45));
 492                 }
 493                 cairo_text_extents(cr, buf, &t_ext);
 494                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 495                 cairo_show_text(cr, buf);
 496
 497                 if (i == 0)
 498                         continue;
 499
 500
 501                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 502                 cairo_move_to(cr, 0.0,            y);
 503                 cairo_line_to(cr, _analysis_width, y);
 504
 505
 506                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 507
 508                 // label
 509                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 510                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 511                 cairo_text_extents(cr, buf, &t_ext);
 512                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 513                 cairo_show_text(cr, buf);
 514
 515                 // line
 516                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 517                 cairo_move_to(cr, 0.0,            y);
 518                 cairo_line_to(cr, _analysis_width, y);
 519
 520                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 521                 cairo_stroke(cr);
 522         }
 523 }
 524
 525 void
 526 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 527 {
 528         float x,y;
 529
 530         int prevX = 0;
 531         float avgY = 0.0;
 532         int avgNum = 0;
 533
 534         // float width  = w->get_width();
 535         float height = w->get_height();
 536
 537         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 538         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 539                 // x coordinate of bin i
 540                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 541                 x *= _analysis_width;
 542
 543                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 544
 545                 if ( i == 0 ) {
 546                         cairo_move_to(cr, x, y);
 547
 548                         avgY = 0;
 549                         avgNum = 0;
 550                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 551                         avgY = avgY/(float)avgNum;
 552                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 553                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 554                         cairo_line_to(cr, prevX, avgY);
 555                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 556
 557                         avgY = 0;
 558                         avgNum = 0;
 559
 560                 }
 561
 562                 prevX = rint(x);
 563                 avgY += y;
 564                 avgNum++;
 565         }
 566
 567         cairo_set_line_width (cr, 2.0);
 568         cairo_stroke(cr);
 569 }
 570
 571 void
 572 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 573 {
 574         if (_impulse_fft == 0) {
 575                 return;
 576         }
 577
 578         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 };
 579         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 580         float x;
 581
 582         cairo_set_line_width (cr, 1.5);
 583         cairo_set_font_size(cr, 9);
 584
 585         cairo_font_extents_t extents;
 586         cairo_font_extents(cr, &extents);
 587         // float fontXOffset = extents.descent + 1.0;
 588
 589         char buf[256];
 590
 591         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 592                 float bin = scales[i] / divisor;
 593
 594                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 595                 x *= _analysis_width;
 596
 597                 if (scales[i] < 1000.0) {
 598                         snprintf(buf, 256, "%0.0f", scales[i]);
 599                 } else {
 600                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 601                 }
 602
 603                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 604
 605                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 606                 cairo_move_to(cr, x - extents.height, 3.0);
 607
 608                 cairo_rotate(cr, M_PI / 2.0);
 609                 cairo_show_text(cr, buf);
 610                 cairo_rotate(cr, -M_PI / 2.0);
 611                 cairo_stroke(cr);
 612
 613                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 614                 cairo_move_to(cr, x, _analysis_height);
 615                 cairo_line_to(cr, x, 0.0);
 616                 cairo_stroke(cr);
 617         }
 618
 619         float y;
 620
 621         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 622         double dashes[] = { 3.0, 5.0 };
 623
 624         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 625                 snprintf(buf, 256, "+%0.0f", dB );
 626
 627                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 628                 //std::cerr << " y = " << y << std::endl;
 629                 y *= _analysis_height;
 630
 631                 if (dB != 0.0) {
 632                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 633                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 634                         cairo_show_text(cr, buf);
 635                         cairo_stroke(cr);
 636                 }
 637
 638                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 639                 cairo_move_to(cr, 0,     y);
 640                 cairo_line_to(cr, _analysis_width, y);
 641                 cairo_stroke(cr);
 642
 643                 if (dB == 0.0) {
 644                         cairo_set_dash(cr, dashes, 2, 0.0);
 645                 }
 646         }
 647
 648
 649
 650         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 651                 snprintf(buf, 256, "%0.0f", dB );
 652
 653                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 654                 y *= _analysis_height;
 655
 656                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 657                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 658                 cairo_show_text(cr, buf);
 659                 cairo_stroke(cr);
 660
 661                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 662                 cairo_move_to(cr, 0,     y);
 663                 cairo_line_to(cr, _analysis_width, y);
 664                 cairo_stroke(cr);
 665         }
 666
 667         cairo_set_dash(cr, 0, 0, 0.0);
 668
 669 }
 670
 671 inline float
 672 power_to_dB(float a)
 673 {
 674         return 10.0 * log10f(a);
 675 }
 676
 677 void
 678 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 679 {
 680         float x,y;
 681         int prevX = 0;
 682         float avgY = 0.0;
 683         int avgNum = 0;
 684
 685         // float width  = w->get_width();
 686         float height = w->get_height();
 687
 688         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 689         cairo_set_line_width (cr, 2.5);
 690
 691         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 692                 // x coordinate of bin i
 693                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 694                 x *= _analysis_width;
 695
 696                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 697
 698                 y = _analysis_height - _analysis_height*yCoeff;
 699
 700                 if ( i == 0 ) {
 701                         cairo_move_to(cr, x, y);
 702
 703                         avgY = 0;
 704                         avgNum = 0;
 705                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 706                         avgY = avgY/(float)avgNum;
 707                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 708                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 709                         cairo_line_to(cr, prevX, avgY);
 710                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 711
 712                         avgY = 0;
 713                         avgNum = 0;
 714
 715                 }
 716
 717                 prevX = rint(x);
 718                 avgY += y;
 719                 avgNum++;
 720         }
 721
 722         cairo_stroke(cr);
 723 }
 724
 725 void
 726 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 727 {
 728         float x,y;
 729
 730         int prevX = 0;
 731         float avgY = 0.0;
 732         int avgNum = 0;
 733
 734         // float width  = w->get_width();
 735         float height = w->get_height();
 736
 737         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 738         cairo_set_line_width (cr, 2.5);
 739
 740         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 741                 // x coordinate of bin i
 742                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 743                 x *= _analysis_width;
 744
 745                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 746                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 747                 float power = power_out - power_in;
 748
 749                 // for SaBer
 750                 /*
 751                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 752  - _signal_input_fft ->power_at_bin(i));
 753                 //p *= 1000000.0;
 754                 float power = (float)p;
 755
 756                 if ( (i % 1000) == 0) {
 757                         std::cerr << i << ": " << power << std::endl;
 758                 }
 759                 */
 760
 761                 if (std::isinf(power)) {
 762                         if (power < 0) {
 763                                 power = _min_dB - 1.0;
 764                         } else {
 765                                 power = _max_dB - 1.0;
 766                         }
 767                 } else if (std::isnan(power)) {
 768                         power = _min_dB - 1.0;
 769                 }
 770
 771                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 772
 773                 y = _analysis_height - _analysis_height*yCoeff;
 774
 775                 if ( i == 0 ) {
 776                         cairo_move_to(cr, x, y);
 777
 778                         avgY = 0;
 779                         avgNum = 0;
 780                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 781                         avgY = avgY/(float)avgNum;
 782                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 783                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 784                         cairo_line_to(cr, prevX, avgY);
 785
 786                         avgY = 0;
 787                         avgNum = 0;
 788
 789                 }
 790
 791                 prevX = rint(x);
 792                 avgY += y;
 793                 avgNum++;
 794         }
 795
 796         cairo_stroke(cr);
 797
 798
 799 }