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