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 #include "i18n.h"
  39
  40 using namespace ARDOUR;
  41
  42 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  43         : _min_dB(-12.0)
  44         , _max_dB(+12.0)
  45         , _step_dB(3.0)
  46         , _impulse_fft(0)
  47         , _signal_input_fft(0)
  48         , _signal_output_fft(0)
  49         , _plugin_insert(pluginInsert)
  50 {
  51         _signal_analysis_running = false;
  52         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  53
  54         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  55         _log_max = log10f(1 + _log_coeff);
  56
  57         // Setup analysis drawing area
  58         _analysis_scale_surface = 0;
  59
  60         _analysis_area = new Gtk::DrawingArea();
  61         _analysis_width = 256.0;
  62         _analysis_height = 256.0;
  63         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  64
  65         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  66         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  67
  68         // dB selection
  69         dBScaleModel = Gtk::ListStore::create(dBColumns);
  70
  71         /* this grotty-looking cast allows compilation against gtkmm 2.24.0, which
  72            added a new ComboBox constructor.
  73         */
  74         dBScaleCombo = new Gtk::ComboBox ((Glib::RefPtr<Gtk::TreeModel> &) dBScaleModel);
  75         dBScaleCombo->set_title (_("dB scale"));
  76
  77 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  78         { \
  79                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  80                 row[dBColumns.dBMin]  = (MIN); \
  81                 row[dBColumns.dBMax]  = (MAX); \
  82                 row[dBColumns.dBStep] = (STEP); \
  83                 row[dBColumns.name]   = NAME; \
  84         }
  85
  86         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  87         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
  88         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
  89         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
  90         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
  91
  92 #undef ADD_DB_ROW
  93
  94         dBScaleCombo -> pack_start(dBColumns.name);
  95         dBScaleCombo -> set_active(1);
  96
  97         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
  98
  99         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 100
 101         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 102         dBSelectBin->add( *manage(dBComboLabel));
 103         dBSelectBin->add( *manage(dBScaleCombo));
 104
 105         // Phase checkbutton
 106         _phase_button = new Gtk::CheckButton (_("Show phase"));
 107         _phase_button->set_active(true);
 108         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 109
 110         // populate table
 111         attach( *manage(_analysis_area), 1, 3, 1, 2);
 112         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 113         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 114 }
 115
 116 PluginEqGui::~PluginEqGui()
 117 {
 118         stop_listening ();
 119
 120         if (_analysis_scale_surface) {
 121                 cairo_surface_destroy (_analysis_scale_surface);
 122         }
 123
 124         delete _impulse_fft;
 125         _impulse_fft = 0;
 126         delete _signal_input_fft;
 127         _signal_input_fft = 0;
 128         delete _signal_output_fft;
 129         _signal_output_fft = 0;
 130
 131         // all gui objects are *manage'd by the inherited Table object
 132 }
 133
 134 void
 135 PluginEqGui::start_listening ()
 136 {
 137         if (!_plugin) {
 138                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 139         }
 140
 141         _plugin->activate();
 142         set_buffer_size(4096, 16384);
 143         // Connect the realtime signal collection callback
 144         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), ui_bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 145 }
 146
 147 void
 148 PluginEqGui::stop_listening ()
 149 {
 150         analysis_connection.disconnect ();
 151         _plugin->deactivate ();
 152 }
 153
 154 void
 155 PluginEqGui::on_hide()
 156 {
 157         stop_updating();
 158         Gtk::Table::on_hide();
 159 }
 160
 161 void
 162 PluginEqGui::stop_updating()
 163 {
 164         if (_update_connection.connected()) {
 165                 _update_connection.disconnect();
 166         }
 167 }
 168
 169 void
 170 PluginEqGui::start_updating()
 171 {
 172         if (!_update_connection.connected() && is_visible()) {
 173                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 174         }
 175 }
 176
 177 void
 178 PluginEqGui::on_show()
 179 {
 180         Gtk::Table::on_show();
 181
 182         start_updating();
 183
 184         Gtk::Widget *toplevel = get_toplevel();
 185         if (toplevel) {
 186                 if (!_window_unmap_connection.connected()) {
 187                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 188                 }
 189
 190                 if (!_window_map_connection.connected()) {
 191                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 192                 }
 193         }
 194 }
 195
 196 void
 197 PluginEqGui::change_dB_scale()
 198 {
 199         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 200
 201         Gtk::TreeModel::Row row;
 202
 203         if(iter && (row = *iter)) {
 204                 _min_dB = row[dBColumns.dBMin];
 205                 _max_dB = row[dBColumns.dBMax];
 206                 _step_dB = row[dBColumns.dBStep];
 207
 208
 209                 redraw_scales();
 210         }
 211 }
 212
 213 void
 214 PluginEqGui::redraw_scales()
 215 {
 216
 217         if (_analysis_scale_surface) {
 218                 cairo_surface_destroy (_analysis_scale_surface);
 219                 _analysis_scale_surface = 0;
 220         }
 221
 222         _analysis_area->queue_draw();
 223
 224         // TODO: Add graph legend!
 225 }
 226
 227 void
 228 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 229 {
 230         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 231                 return;
 232         }
 233
 234         GTKArdour::FFT *tmp1 = _impulse_fft;
 235         GTKArdour::FFT *tmp2 = _signal_input_fft;
 236         GTKArdour::FFT *tmp3 = _signal_output_fft;
 237
 238         try {
 239                 _impulse_fft       = new GTKArdour::FFT(size);
 240                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 241                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 242         } catch( ... ) {
 243                 // Don't care about lost memory, we're screwed anyhow
 244                 _impulse_fft       = tmp1;
 245                 _signal_input_fft  = tmp2;
 246                 _signal_output_fft = tmp3;
 247                 throw;
 248         }
 249
 250         delete tmp1;
 251         delete tmp2;
 252         delete tmp3;
 253
 254         _buffer_size = size;
 255         _signal_buffer_size = signal_size;
 256
 257         ARDOUR::ChanCount count = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 258
 259         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 260                 _bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 261                 _collect_bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 262         }
 263
 264         _bufferset.set_count (count);
 265         _collect_bufferset.set_count (count);
 266 }
 267
 268 void
 269 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 270 {
 271         _analysis_width  = (float)size.get_width();
 272         _analysis_height = (float)size.get_height();
 273
 274         if (_analysis_scale_surface) {
 275                 cairo_surface_destroy (_analysis_scale_surface);
 276                 _analysis_scale_surface = 0;
 277         }
 278 }
 279
 280 bool
 281 PluginEqGui::timeout_callback()
 282 {
 283         if (!_signal_analysis_running) {
 284                 _signal_analysis_running = true;
 285                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 286         }
 287         run_impulse_analysis();
 288
 289         return true;
 290 }
 291
 292 void
 293 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 294 {
 295         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out)
 296
 297         _signal_input_fft ->reset();
 298         _signal_output_fft->reset();
 299
 300         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 301                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 302         }
 303
 304         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 305                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 306         }
 307
 308         _signal_input_fft ->calculate();
 309         _signal_output_fft->calculate();
 310
 311         _signal_analysis_running = false;
 312
 313         // This signals calls expose_analysis_area()
 314         _analysis_area->queue_draw();
 315 }
 316
 317 void
 318 PluginEqGui::run_impulse_analysis()
 319 {
 320         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 321         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 322
 323         // Create the impulse, can't use silence() because consecutive calls won't work
 324         for (uint32_t i = 0; i < inputs; ++i) {
 325                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 326                 ARDOUR::Sample* d = buf.data();
 327                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 328                 *d = 1.0;
 329         }
 330
 331         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 332         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 333
 334         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 335         framecnt_t f = _plugin->signal_latency ();
 336         // Adding user_latency() could be interesting
 337
 338         // Gather all output, taking latency into account.
 339         _impulse_fft->reset();
 340
 341         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 342         for (uint32_t i = 0; i < outputs; ++i) {
 343                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 344                 ARDOUR::Sample *d = buf.data();
 345                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 346         }
 347
 348         if (f == 0) {
 349                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 350                 for (uint32_t i = 0; i < outputs; ++i) {
 351                         memcpy(_collect_bufferset.get_audio(i).data(),
 352                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 353                 }
 354         } else {
 355                 //int C = 0;
 356                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 357                 framecnt_t target_offset = 0;
 358                 framecnt_t frames_left = _buffer_size; // refaktoroi
 359                 do {
 360                         if (f >= _buffer_size) {
 361                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 362                                 // there is no data in this buffer regarding to the input!
 363                                 f -= _buffer_size;
 364                         } else {
 365                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 366                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 367                                 //             we start at output offset "f"
 368                                 //             .. and copy "buffer size" - "f" - "offset" frames
 369
 370                                 framecnt_t length = _buffer_size - f - target_offset;
 371
 372                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 373                                 for (uint32_t i = 0; i < outputs; ++i) {
 374                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 375                                                 _bufferset.get_audio(i).data() + f,
 376                                                 length * sizeof(float));
 377                                 }
 378
 379                                 target_offset += length;
 380                                 frames_left   -= length;
 381                                 f = 0;
 382                         }
 383                         if (frames_left > 0) {
 384                                 // Silence the buffers
 385                                 for (uint32_t i = 0; i < inputs; ++i) {
 386                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 387                                         ARDOUR::Sample *d = buf.data();
 388                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 389                                 }
 390
 391                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 392                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 393                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 394                         }
 395                 } while ( frames_left > 0);
 396
 397         }
 398
 399
 400         for (uint32_t i = 0; i < outputs; ++i) {
 401                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 402         }
 403
 404         // normalize the output
 405         _impulse_fft->calculate();
 406
 407         // This signals calls expose_analysis_area()
 408         _analysis_area->queue_draw();
 409 }
 410
 411 bool
 412 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 413 {
 414         redraw_analysis_area();
 415         return true;
 416 }
 417
 418 void
 419 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 420 {
 421         // TODO: check whether we need rounding
 422         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 423                                                              CAIRO_CONTENT_COLOR,
 424                                                              _analysis_width,
 425                                                              _analysis_height);
 426
 427         cairo_t *cr = cairo_create (_analysis_scale_surface);
 428
 429         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 430         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 431         cairo_fill(cr);
 432
 433
 434         draw_scales_power(_analysis_area, cr);
 435         if (_phase_button->get_active()) {
 436                 draw_scales_phase(_analysis_area, cr);
 437         }
 438
 439         cairo_destroy(cr);
 440
 441 }
 442
 443 void
 444 PluginEqGui::redraw_analysis_area()
 445 {
 446         cairo_t *cr;
 447
 448         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 449
 450         if (_analysis_scale_surface == 0) {
 451                 draw_analysis_scales(cr);
 452         }
 453
 454
 455         cairo_copy_page(cr);
 456
 457         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 458         cairo_paint(cr);
 459
 460         if (_phase_button->get_active()) {
 461                 plot_impulse_phase(_analysis_area, cr);
 462         }
 463         plot_impulse_amplitude(_analysis_area, cr);
 464
 465         // TODO: make this optional
 466         plot_signal_amplitude_difference(_analysis_area, cr);
 467
 468         cairo_destroy(cr);
 469
 470
 471 }
 472
 473 #define PHASE_PROPORTION 0.5
 474
 475 void
 476 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 477 {
 478         float y;
 479         cairo_font_extents_t extents;
 480         cairo_font_extents(cr, &extents);
 481
 482         char buf[256];
 483         cairo_text_extents_t t_ext;
 484
 485         for (uint32_t i = 0; i < 3; i++) {
 486
 487                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 488
 489                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 490                 if (i == 0) {
 491                         snprintf(buf,256, "0\u00b0");
 492                 } else {
 493                         snprintf(buf,256, "%d\u00b0", (i * 45));
 494                 }
 495                 cairo_text_extents(cr, buf, &t_ext);
 496                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 497                 cairo_show_text(cr, buf);
 498
 499                 if (i == 0)
 500                         continue;
 501
 502
 503                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 504                 cairo_move_to(cr, 0.0,            y);
 505                 cairo_line_to(cr, _analysis_width, y);
 506
 507
 508                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 509
 510                 // label
 511                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 512                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 513                 cairo_text_extents(cr, buf, &t_ext);
 514                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 515                 cairo_show_text(cr, buf);
 516
 517                 // line
 518                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 519                 cairo_move_to(cr, 0.0,            y);
 520                 cairo_line_to(cr, _analysis_width, y);
 521
 522                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 523                 cairo_stroke(cr);
 524         }
 525 }
 526
 527 void
 528 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 529 {
 530         float x,y;
 531
 532         int prevX = 0;
 533         float avgY = 0.0;
 534         int avgNum = 0;
 535
 536         // float width  = w->get_width();
 537         float height = w->get_height();
 538
 539         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 540         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 541                 // x coordinate of bin i
 542                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 543                 x *= _analysis_width;
 544
 545                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 546
 547                 if ( i == 0 ) {
 548                         cairo_move_to(cr, x, y);
 549
 550                         avgY = 0;
 551                         avgNum = 0;
 552                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 553                         avgY = avgY/(float)avgNum;
 554                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 555                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 556                         cairo_line_to(cr, prevX, avgY);
 557                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 558
 559                         avgY = 0;
 560                         avgNum = 0;
 561
 562                 }
 563
 564                 prevX = rint(x);
 565                 avgY += y;
 566                 avgNum++;
 567         }
 568
 569         cairo_set_line_width (cr, 2.0);
 570         cairo_stroke(cr);
 571 }
 572
 573 void
 574 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 575 {
 576         if (_impulse_fft == 0) {
 577                 return;
 578         }
 579
 580         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 };
 581         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 582         float x;
 583
 584         cairo_set_line_width (cr, 1.5);
 585         cairo_set_font_size(cr, 9);
 586
 587         cairo_font_extents_t extents;
 588         cairo_font_extents(cr, &extents);
 589         // float fontXOffset = extents.descent + 1.0;
 590
 591         char buf[256];
 592
 593         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 594                 float bin = scales[i] / divisor;
 595
 596                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 597                 x *= _analysis_width;
 598
 599                 if (scales[i] < 1000.0) {
 600                         snprintf(buf, 256, "%0.0f", scales[i]);
 601                 } else {
 602                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 603                 }
 604
 605                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 606
 607                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 608                 cairo_move_to(cr, x - extents.height, 3.0);
 609
 610                 cairo_rotate(cr, M_PI / 2.0);
 611                 cairo_show_text(cr, buf);
 612                 cairo_rotate(cr, -M_PI / 2.0);
 613                 cairo_stroke(cr);
 614
 615                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 616                 cairo_move_to(cr, x, _analysis_height);
 617                 cairo_line_to(cr, x, 0.0);
 618                 cairo_stroke(cr);
 619         }
 620
 621         float y;
 622
 623         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 624         double dashes[] = { 3.0, 5.0 };
 625
 626         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 627                 snprintf(buf, 256, "+%0.0f", dB );
 628
 629                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 630                 //std::cerr << " y = " << y << std::endl;
 631                 y *= _analysis_height;
 632
 633                 if (dB != 0.0) {
 634                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 635                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 636                         cairo_show_text(cr, buf);
 637                         cairo_stroke(cr);
 638                 }
 639
 640                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 641                 cairo_move_to(cr, 0,     y);
 642                 cairo_line_to(cr, _analysis_width, y);
 643                 cairo_stroke(cr);
 644
 645                 if (dB == 0.0) {
 646                         cairo_set_dash(cr, dashes, 2, 0.0);
 647                 }
 648         }
 649
 650
 651
 652         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 653                 snprintf(buf, 256, "%0.0f", dB );
 654
 655                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 656                 y *= _analysis_height;
 657
 658                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 659                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 660                 cairo_show_text(cr, buf);
 661                 cairo_stroke(cr);
 662
 663                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 664                 cairo_move_to(cr, 0,     y);
 665                 cairo_line_to(cr, _analysis_width, y);
 666                 cairo_stroke(cr);
 667         }
 668
 669         cairo_set_dash(cr, 0, 0, 0.0);
 670
 671 }
 672
 673 inline float
 674 power_to_dB(float a)
 675 {
 676         return 10.0 * log10f(a);
 677 }
 678
 679 void
 680 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 681 {
 682         float x,y;
 683         int prevX = 0;
 684         float avgY = 0.0;
 685         int avgNum = 0;
 686
 687         // float width  = w->get_width();
 688         float height = w->get_height();
 689
 690         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 691         cairo_set_line_width (cr, 2.5);
 692
 693         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 694                 // x coordinate of bin i
 695                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 696                 x *= _analysis_width;
 697
 698                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 699
 700                 y = _analysis_height - _analysis_height*yCoeff;
 701
 702                 if ( i == 0 ) {
 703                         cairo_move_to(cr, x, y);
 704
 705                         avgY = 0;
 706                         avgNum = 0;
 707                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 708                         avgY = avgY/(float)avgNum;
 709                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 710                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 711                         cairo_line_to(cr, prevX, avgY);
 712                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 713
 714                         avgY = 0;
 715                         avgNum = 0;
 716
 717                 }
 718
 719                 prevX = rint(x);
 720                 avgY += y;
 721                 avgNum++;
 722         }
 723
 724         cairo_stroke(cr);
 725 }
 726
 727 void
 728 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 729 {
 730         float x,y;
 731
 732         int prevX = 0;
 733         float avgY = 0.0;
 734         int avgNum = 0;
 735
 736         // float width  = w->get_width();
 737         float height = w->get_height();
 738
 739         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 740         cairo_set_line_width (cr, 2.5);
 741
 742         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 743                 // x coordinate of bin i
 744                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 745                 x *= _analysis_width;
 746
 747                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 748                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 749                 float power = power_out - power_in;
 750
 751                 // for SaBer
 752                 /*
 753                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 754  - _signal_input_fft ->power_at_bin(i));
 755                 //p *= 1000000.0;
 756                 float power = (float)p;
 757
 758                 if ( (i % 1000) == 0) {
 759                         std::cerr << i << ": " << power << std::endl;
 760                 }
 761                 */
 762
 763                 if (std::isinf(power)) {
 764                         if (power < 0) {
 765                                 power = _min_dB - 1.0;
 766                         } else {
 767                                 power = _max_dB - 1.0;
 768                         }
 769                 } else if (std::isnan(power)) {
 770                         power = _min_dB - 1.0;
 771                 }
 772
 773                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 774
 775                 y = _analysis_height - _analysis_height*yCoeff;
 776
 777                 if ( i == 0 ) {
 778                         cairo_move_to(cr, x, y);
 779
 780                         avgY = 0;
 781                         avgNum = 0;
 782                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 783                         avgY = avgY/(float)avgNum;
 784                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 785                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 786                         cairo_line_to(cr, prevX, avgY);
 787
 788                         avgY = 0;
 789                         avgNum = 0;
 790
 791                 }
 792
 793                 prevX = rint(x);
 794                 avgY += y;
 795                 avgNum++;
 796         }
 797
 798         cairo_stroke(cr);
 799
 800
 801 }