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), boost::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         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 321         ARDOUR_UI::instance()->get_process_buffers ();
 322
 323         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 324         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 325
 326         // Create the impulse, can't use silence() because consecutive calls won't work
 327         for (uint32_t i = 0; i < inputs; ++i) {
 328                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 329                 ARDOUR::Sample* d = buf.data();
 330                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 331                 *d = 1.0;
 332         }
 333
 334         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 335         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 336
 337         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 338         framecnt_t f = _plugin->signal_latency ();
 339         // Adding user_latency() could be interesting
 340
 341         // Gather all output, taking latency into account.
 342         _impulse_fft->reset();
 343
 344         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 345         for (uint32_t i = 0; i < outputs; ++i) {
 346                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 347                 ARDOUR::Sample *d = buf.data();
 348                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 349         }
 350
 351         if (f == 0) {
 352                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 353                 for (uint32_t i = 0; i < outputs; ++i) {
 354                         memcpy(_collect_bufferset.get_audio(i).data(),
 355                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 356                 }
 357         } else {
 358                 //int C = 0;
 359                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 360                 framecnt_t target_offset = 0;
 361                 framecnt_t frames_left = _buffer_size; // refaktoroi
 362                 do {
 363                         if (f >= _buffer_size) {
 364                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 365                                 // there is no data in this buffer regarding to the input!
 366                                 f -= _buffer_size;
 367                         } else {
 368                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 369                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 370                                 //             we start at output offset "f"
 371                                 //             .. and copy "buffer size" - "f" - "offset" frames
 372
 373                                 framecnt_t length = _buffer_size - f - target_offset;
 374
 375                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 376                                 for (uint32_t i = 0; i < outputs; ++i) {
 377                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 378                                                 _bufferset.get_audio(i).data() + f,
 379                                                 length * sizeof(float));
 380                                 }
 381
 382                                 target_offset += length;
 383                                 frames_left   -= length;
 384                                 f = 0;
 385                         }
 386                         if (frames_left > 0) {
 387                                 // Silence the buffers
 388                                 for (uint32_t i = 0; i < inputs; ++i) {
 389                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 390                                         ARDOUR::Sample *d = buf.data();
 391                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 392                                 }
 393
 394                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 395                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 396                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 397                         }
 398                 } while ( frames_left > 0);
 399
 400         }
 401
 402
 403         for (uint32_t i = 0; i < outputs; ++i) {
 404                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 405         }
 406
 407         // normalize the output
 408         _impulse_fft->calculate();
 409
 410         // This signals calls expose_analysis_area()
 411         _analysis_area->queue_draw();
 412
 413         ARDOUR_UI::instance()->drop_process_buffers ();
 414 }
 415
 416 bool
 417 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 418 {
 419         redraw_analysis_area();
 420         return true;
 421 }
 422
 423 void
 424 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 425 {
 426         // TODO: check whether we need rounding
 427         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 428                                                              CAIRO_CONTENT_COLOR,
 429                                                              _analysis_width,
 430                                                              _analysis_height);
 431
 432         cairo_t *cr = cairo_create (_analysis_scale_surface);
 433
 434         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 435         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 436         cairo_fill(cr);
 437
 438
 439         draw_scales_power(_analysis_area, cr);
 440         if (_phase_button->get_active()) {
 441                 draw_scales_phase(_analysis_area, cr);
 442         }
 443
 444         cairo_destroy(cr);
 445
 446 }
 447
 448 void
 449 PluginEqGui::redraw_analysis_area()
 450 {
 451         cairo_t *cr;
 452
 453         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 454
 455         if (_analysis_scale_surface == 0) {
 456                 draw_analysis_scales(cr);
 457         }
 458
 459
 460         cairo_copy_page(cr);
 461
 462         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 463         cairo_paint(cr);
 464
 465         if (_phase_button->get_active()) {
 466                 plot_impulse_phase(_analysis_area, cr);
 467         }
 468         plot_impulse_amplitude(_analysis_area, cr);
 469
 470         // TODO: make this optional
 471         plot_signal_amplitude_difference(_analysis_area, cr);
 472
 473         cairo_destroy(cr);
 474
 475
 476 }
 477
 478 #define PHASE_PROPORTION 0.5
 479
 480 void
 481 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 482 {
 483         float y;
 484         cairo_font_extents_t extents;
 485         cairo_font_extents(cr, &extents);
 486
 487         char buf[256];
 488         cairo_text_extents_t t_ext;
 489
 490         for (uint32_t i = 0; i < 3; i++) {
 491
 492                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 493
 494                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 495                 if (i == 0) {
 496                         snprintf(buf,256, "0\u00b0");
 497                 } else {
 498                         snprintf(buf,256, "%d\u00b0", (i * 45));
 499                 }
 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                 if (i == 0)
 505                         continue;
 506
 507
 508                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 509                 cairo_move_to(cr, 0.0,            y);
 510                 cairo_line_to(cr, _analysis_width, y);
 511
 512
 513                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 514
 515                 // label
 516                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 517                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 518                 cairo_text_extents(cr, buf, &t_ext);
 519                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 520                 cairo_show_text(cr, buf);
 521
 522                 // line
 523                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 524                 cairo_move_to(cr, 0.0,            y);
 525                 cairo_line_to(cr, _analysis_width, y);
 526
 527                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 528                 cairo_stroke(cr);
 529         }
 530 }
 531
 532 void
 533 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 534 {
 535         float x,y;
 536
 537         int prevX = 0;
 538         float avgY = 0.0;
 539         int avgNum = 0;
 540
 541         // float width  = w->get_width();
 542         float height = w->get_height();
 543
 544         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 545         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 546                 // x coordinate of bin i
 547                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 548                 x *= _analysis_width;
 549
 550                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 551
 552                 if ( i == 0 ) {
 553                         cairo_move_to(cr, x, y);
 554
 555                         avgY = 0;
 556                         avgNum = 0;
 557                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 558                         avgY = avgY/(float)avgNum;
 559                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 560                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 561                         cairo_line_to(cr, prevX, avgY);
 562                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 563
 564                         avgY = 0;
 565                         avgNum = 0;
 566
 567                 }
 568
 569                 prevX = rint(x);
 570                 avgY += y;
 571                 avgNum++;
 572         }
 573
 574         cairo_set_line_width (cr, 2.0);
 575         cairo_stroke(cr);
 576 }
 577
 578 void
 579 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 580 {
 581         if (_impulse_fft == 0) {
 582                 return;
 583         }
 584
 585         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 };
 586         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 587         float x;
 588
 589         cairo_set_line_width (cr, 1.5);
 590         cairo_set_font_size(cr, 9);
 591
 592         cairo_font_extents_t extents;
 593         cairo_font_extents(cr, &extents);
 594         // float fontXOffset = extents.descent + 1.0;
 595
 596         char buf[256];
 597
 598         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 599                 float bin = scales[i] / divisor;
 600
 601                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 602                 x *= _analysis_width;
 603
 604                 if (scales[i] < 1000.0) {
 605                         snprintf(buf, 256, "%0.0f", scales[i]);
 606                 } else {
 607                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 608                 }
 609
 610                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 611
 612                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 613                 cairo_move_to(cr, x - extents.height, 3.0);
 614
 615                 cairo_rotate(cr, M_PI / 2.0);
 616                 cairo_show_text(cr, buf);
 617                 cairo_rotate(cr, -M_PI / 2.0);
 618                 cairo_stroke(cr);
 619
 620                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 621                 cairo_move_to(cr, x, _analysis_height);
 622                 cairo_line_to(cr, x, 0.0);
 623                 cairo_stroke(cr);
 624         }
 625
 626         float y;
 627
 628         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 629         double dashes[] = { 3.0, 5.0 };
 630
 631         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 632                 snprintf(buf, 256, "+%0.0f", dB );
 633
 634                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 635                 //std::cerr << " y = " << y << std::endl;
 636                 y *= _analysis_height;
 637
 638                 if (dB != 0.0) {
 639                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 640                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 641                         cairo_show_text(cr, buf);
 642                         cairo_stroke(cr);
 643                 }
 644
 645                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 646                 cairo_move_to(cr, 0,     y);
 647                 cairo_line_to(cr, _analysis_width, y);
 648                 cairo_stroke(cr);
 649
 650                 if (dB == 0.0) {
 651                         cairo_set_dash(cr, dashes, 2, 0.0);
 652                 }
 653         }
 654
 655
 656
 657         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 658                 snprintf(buf, 256, "%0.0f", dB );
 659
 660                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 661                 y *= _analysis_height;
 662
 663                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 664                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 665                 cairo_show_text(cr, buf);
 666                 cairo_stroke(cr);
 667
 668                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 669                 cairo_move_to(cr, 0,     y);
 670                 cairo_line_to(cr, _analysis_width, y);
 671                 cairo_stroke(cr);
 672         }
 673
 674         cairo_set_dash(cr, 0, 0, 0.0);
 675
 676 }
 677
 678 inline float
 679 power_to_dB(float a)
 680 {
 681         return 10.0 * log10f(a);
 682 }
 683
 684 void
 685 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 686 {
 687         float x,y;
 688         int prevX = 0;
 689         float avgY = 0.0;
 690         int avgNum = 0;
 691
 692         // float width  = w->get_width();
 693         float height = w->get_height();
 694
 695         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 696         cairo_set_line_width (cr, 2.5);
 697
 698         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 699                 // x coordinate of bin i
 700                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 701                 x *= _analysis_width;
 702
 703                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 704
 705                 y = _analysis_height - _analysis_height*yCoeff;
 706
 707                 if ( i == 0 ) {
 708                         cairo_move_to(cr, x, y);
 709
 710                         avgY = 0;
 711                         avgNum = 0;
 712                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 713                         avgY = avgY/(float)avgNum;
 714                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 715                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 716                         cairo_line_to(cr, prevX, avgY);
 717                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 718
 719                         avgY = 0;
 720                         avgNum = 0;
 721
 722                 }
 723
 724                 prevX = rint(x);
 725                 avgY += y;
 726                 avgNum++;
 727         }
 728
 729         cairo_stroke(cr);
 730 }
 731
 732 void
 733 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 734 {
 735         float x,y;
 736
 737         int prevX = 0;
 738         float avgY = 0.0;
 739         int avgNum = 0;
 740
 741         // float width  = w->get_width();
 742         float height = w->get_height();
 743
 744         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 745         cairo_set_line_width (cr, 2.5);
 746
 747         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 748                 // x coordinate of bin i
 749                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 750                 x *= _analysis_width;
 751
 752                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 753                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 754                 float power = power_out - power_in;
 755
 756                 // for SaBer
 757                 /*
 758                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 759  - _signal_input_fft ->power_at_bin(i));
 760                 //p *= 1000000.0;
 761                 float power = (float)p;
 762
 763                 if ( (i % 1000) == 0) {
 764                         std::cerr << i << ": " << power << std::endl;
 765                 }
 766                 */
 767
 768                 if (std::isinf(power)) {
 769                         if (power < 0) {
 770                                 power = _min_dB - 1.0;
 771                         } else {
 772                                 power = _max_dB - 1.0;
 773                         }
 774                 } else if (std::isnan(power)) {
 775                         power = _min_dB - 1.0;
 776                 }
 777
 778                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 779
 780                 y = _analysis_height - _analysis_height*yCoeff;
 781
 782                 if ( i == 0 ) {
 783                         cairo_move_to(cr, x, y);
 784
 785                         avgY = 0;
 786                         avgNum = 0;
 787                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 788                         avgY = avgY/(float)avgNum;
 789                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 790                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 791                         cairo_line_to(cr, prevX, avgY);
 792
 793                         avgY = 0;
 794                         avgNum = 0;
 795
 796                 }
 797
 798                 prevX = rint(x);
 799                 avgY += y;
 800                 avgNum++;
 801         }
 802
 803         cairo_stroke(cr);
 804
 805
 806 }