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 #ifdef COMPILER_MSVC
  22 #include <float.h>
  23 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
  24 #define isinf(val) !((bool)_finite((double)val))
  25 #define isnan(val) (bool)_isnan((double)val)
  26 #endif
  27
  28 #include "plugin_eq_gui.h"
  29 #include "fft.h"
  30
  31 #include "ardour_ui.h"
  32 #include "gui_thread.h"
  33 #include "ardour/audio_buffer.h"
  34 #include "ardour/data_type.h"
  35 #include "ardour/chan_mapping.h"
  36 #include "ardour/session.h"
  37
  38 #include <gtkmm/box.h>
  39 #include <gtkmm/button.h>
  40 #include <gtkmm/checkbutton.h>
  41
  42 #include <iostream>
  43 #include <cmath>
  44
  45 #include "i18n.h"
  46
  47 using namespace ARDOUR;
  48
  49 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  50         : _min_dB(-12.0)
  51         , _max_dB(+12.0)
  52         , _step_dB(3.0)
  53         , _impulse_fft(0)
  54         , _signal_input_fft(0)
  55         , _signal_output_fft(0)
  56         , _plugin_insert(pluginInsert)
  57 {
  58         _signal_analysis_running = false;
  59         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  60
  61         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  62         _log_max = log10f(1 + _log_coeff);
  63
  64         // Setup analysis drawing area
  65         _analysis_scale_surface = 0;
  66
  67         _analysis_area = new Gtk::DrawingArea();
  68         _analysis_width = 256.0;
  69         _analysis_height = 256.0;
  70         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  71
  72         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  73         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  74
  75         // dB selection
  76         dBScaleModel = Gtk::ListStore::create(dBColumns);
  77
  78         /* this grotty-looking cast allows compilation against gtkmm 2.24.0, which
  79            added a new ComboBox constructor.
  80         */
  81         dBScaleCombo = new Gtk::ComboBox ((Glib::RefPtr<Gtk::TreeModel> &) dBScaleModel);
  82         dBScaleCombo->set_title (_("dB scale"));
  83
  84 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  85         { \
  86                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  87                 row[dBColumns.dBMin]  = (MIN); \
  88                 row[dBColumns.dBMax]  = (MAX); \
  89                 row[dBColumns.dBStep] = (STEP); \
  90                 row[dBColumns.name]   = NAME; \
  91         }
  92
  93         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  94         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
  95         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
  96         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
  97         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
  98
  99 #undef ADD_DB_ROW
 100
 101         dBScaleCombo -> pack_start(dBColumns.name);
 102         dBScaleCombo -> set_active(1);
 103
 104         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
 105
 106         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 107
 108         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 109         dBSelectBin->add( *manage(dBComboLabel));
 110         dBSelectBin->add( *manage(dBScaleCombo));
 111
 112         // Phase checkbutton
 113         _phase_button = new Gtk::CheckButton (_("Show phase"));
 114         _phase_button->set_active(true);
 115         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 116
 117         // populate table
 118         attach( *manage(_analysis_area), 1, 3, 1, 2);
 119         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 120         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 121 }
 122
 123 PluginEqGui::~PluginEqGui()
 124 {
 125         stop_listening ();
 126
 127         if (_analysis_scale_surface) {
 128                 cairo_surface_destroy (_analysis_scale_surface);
 129         }
 130
 131         delete _impulse_fft;
 132         _impulse_fft = 0;
 133         delete _signal_input_fft;
 134         _signal_input_fft = 0;
 135         delete _signal_output_fft;
 136         _signal_output_fft = 0;
 137
 138         // all gui objects are *manage'd by the inherited Table object
 139 }
 140
 141 void
 142 PluginEqGui::start_listening ()
 143 {
 144         if (!_plugin) {
 145                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 146         }
 147
 148         _plugin->activate();
 149         set_buffer_size(4096, 16384);
 150         // Connect the realtime signal collection callback
 151         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 152 }
 153
 154 void
 155 PluginEqGui::stop_listening ()
 156 {
 157         analysis_connection.disconnect ();
 158         _plugin->deactivate ();
 159 }
 160
 161 void
 162 PluginEqGui::on_hide()
 163 {
 164         stop_updating();
 165         Gtk::Table::on_hide();
 166 }
 167
 168 void
 169 PluginEqGui::stop_updating()
 170 {
 171         if (_update_connection.connected()) {
 172                 _update_connection.disconnect();
 173         }
 174 }
 175
 176 void
 177 PluginEqGui::start_updating()
 178 {
 179         if (!_update_connection.connected() && is_visible()) {
 180                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 181         }
 182 }
 183
 184 void
 185 PluginEqGui::on_show()
 186 {
 187         Gtk::Table::on_show();
 188
 189         start_updating();
 190
 191         Gtk::Widget *toplevel = get_toplevel();
 192         if (toplevel) {
 193                 if (!_window_unmap_connection.connected()) {
 194                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 195                 }
 196
 197                 if (!_window_map_connection.connected()) {
 198                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 199                 }
 200         }
 201 }
 202
 203 void
 204 PluginEqGui::change_dB_scale()
 205 {
 206         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 207
 208         Gtk::TreeModel::Row row;
 209
 210         if(iter && (row = *iter)) {
 211                 _min_dB = row[dBColumns.dBMin];
 212                 _max_dB = row[dBColumns.dBMax];
 213                 _step_dB = row[dBColumns.dBStep];
 214
 215
 216                 redraw_scales();
 217         }
 218 }
 219
 220 void
 221 PluginEqGui::redraw_scales()
 222 {
 223
 224         if (_analysis_scale_surface) {
 225                 cairo_surface_destroy (_analysis_scale_surface);
 226                 _analysis_scale_surface = 0;
 227         }
 228
 229         _analysis_area->queue_draw();
 230
 231         // TODO: Add graph legend!
 232 }
 233
 234 void
 235 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 236 {
 237         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 238                 return;
 239         }
 240
 241         GTKArdour::FFT *tmp1 = _impulse_fft;
 242         GTKArdour::FFT *tmp2 = _signal_input_fft;
 243         GTKArdour::FFT *tmp3 = _signal_output_fft;
 244
 245         try {
 246                 _impulse_fft       = new GTKArdour::FFT(size);
 247                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 248                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 249         } catch( ... ) {
 250                 // Don't care about lost memory, we're screwed anyhow
 251                 _impulse_fft       = tmp1;
 252                 _signal_input_fft  = tmp2;
 253                 _signal_output_fft = tmp3;
 254                 throw;
 255         }
 256
 257         delete tmp1;
 258         delete tmp2;
 259         delete tmp3;
 260
 261         _buffer_size = size;
 262         _signal_buffer_size = signal_size;
 263
 264         ARDOUR::ChanCount count = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 265
 266         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 267                 _bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 268                 _collect_bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 269         }
 270
 271         _bufferset.set_count (count);
 272         _collect_bufferset.set_count (count);
 273 }
 274
 275 void
 276 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 277 {
 278         _analysis_width  = (float)size.get_width();
 279         _analysis_height = (float)size.get_height();
 280
 281         if (_analysis_scale_surface) {
 282                 cairo_surface_destroy (_analysis_scale_surface);
 283                 _analysis_scale_surface = 0;
 284         }
 285 }
 286
 287 bool
 288 PluginEqGui::timeout_callback()
 289 {
 290         if (!_signal_analysis_running) {
 291                 _signal_analysis_running = true;
 292                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 293         }
 294         run_impulse_analysis();
 295
 296         return true;
 297 }
 298
 299 void
 300 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 301 {
 302         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out)
 303
 304         _signal_input_fft ->reset();
 305         _signal_output_fft->reset();
 306
 307         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 308                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 309         }
 310
 311         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 312                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 313         }
 314
 315         _signal_input_fft ->calculate();
 316         _signal_output_fft->calculate();
 317
 318         _signal_analysis_running = false;
 319
 320         // This signals calls expose_analysis_area()
 321         _analysis_area->queue_draw();
 322 }
 323
 324 void
 325 PluginEqGui::run_impulse_analysis()
 326 {
 327         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 328         ARDOUR_UI::instance()->get_process_buffers ();
 329
 330         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 331         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 332
 333         // Create the impulse, can't use silence() because consecutive calls won't work
 334         for (uint32_t i = 0; i < inputs; ++i) {
 335                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 336                 ARDOUR::Sample* d = buf.data();
 337                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 338                 *d = 1.0;
 339         }
 340
 341         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 342         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 343
 344         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 345         framecnt_t f = _plugin->signal_latency ();
 346         // Adding user_latency() could be interesting
 347
 348         // Gather all output, taking latency into account.
 349         _impulse_fft->reset();
 350
 351         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 352         for (uint32_t i = 0; i < outputs; ++i) {
 353                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 354                 ARDOUR::Sample *d = buf.data();
 355                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 356         }
 357
 358         if (f == 0) {
 359                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 360                 for (uint32_t i = 0; i < outputs; ++i) {
 361                         memcpy(_collect_bufferset.get_audio(i).data(),
 362                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 363                 }
 364         } else {
 365                 //int C = 0;
 366                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 367                 framecnt_t target_offset = 0;
 368                 framecnt_t frames_left = _buffer_size; // refaktoroi
 369                 do {
 370                         if (f >= _buffer_size) {
 371                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 372                                 // there is no data in this buffer regarding to the input!
 373                                 f -= _buffer_size;
 374                         } else {
 375                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 376                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 377                                 //             we start at output offset "f"
 378                                 //             .. and copy "buffer size" - "f" - "offset" frames
 379
 380                                 framecnt_t length = _buffer_size - f - target_offset;
 381
 382                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 383                                 for (uint32_t i = 0; i < outputs; ++i) {
 384                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 385                                                 _bufferset.get_audio(i).data() + f,
 386                                                 length * sizeof(float));
 387                                 }
 388
 389                                 target_offset += length;
 390                                 frames_left   -= length;
 391                                 f = 0;
 392                         }
 393                         if (frames_left > 0) {
 394                                 // Silence the buffers
 395                                 for (uint32_t i = 0; i < inputs; ++i) {
 396                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 397                                         ARDOUR::Sample *d = buf.data();
 398                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 399                                 }
 400
 401                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 402                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 403                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 404                         }
 405                 } while ( frames_left > 0);
 406
 407         }
 408
 409
 410         for (uint32_t i = 0; i < outputs; ++i) {
 411                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 412         }
 413
 414         // normalize the output
 415         _impulse_fft->calculate();
 416
 417         // This signals calls expose_analysis_area()
 418         _analysis_area->queue_draw();
 419
 420         ARDOUR_UI::instance()->drop_process_buffers ();
 421 }
 422
 423 bool
 424 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 425 {
 426         redraw_analysis_area();
 427         return true;
 428 }
 429
 430 void
 431 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 432 {
 433         // TODO: check whether we need rounding
 434         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 435                                                              CAIRO_CONTENT_COLOR,
 436                                                              _analysis_width,
 437                                                              _analysis_height);
 438
 439         cairo_t *cr = cairo_create (_analysis_scale_surface);
 440
 441         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 442         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 443         cairo_fill(cr);
 444
 445
 446         draw_scales_power(_analysis_area, cr);
 447         if (_phase_button->get_active()) {
 448                 draw_scales_phase(_analysis_area, cr);
 449         }
 450
 451         cairo_destroy(cr);
 452
 453 }
 454
 455 void
 456 PluginEqGui::redraw_analysis_area()
 457 {
 458         cairo_t *cr;
 459
 460         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 461
 462         if (_analysis_scale_surface == 0) {
 463                 draw_analysis_scales(cr);
 464         }
 465
 466
 467         cairo_copy_page(cr);
 468
 469         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 470         cairo_paint(cr);
 471
 472         if (_phase_button->get_active()) {
 473                 plot_impulse_phase(_analysis_area, cr);
 474         }
 475         plot_impulse_amplitude(_analysis_area, cr);
 476
 477         // TODO: make this optional
 478         plot_signal_amplitude_difference(_analysis_area, cr);
 479
 480         cairo_destroy(cr);
 481
 482
 483 }
 484
 485 #define PHASE_PROPORTION 0.5
 486
 487 void
 488 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 489 {
 490         float y;
 491         cairo_font_extents_t extents;
 492         cairo_font_extents(cr, &extents);
 493
 494         char buf[256];
 495         cairo_text_extents_t t_ext;
 496
 497         for (uint32_t i = 0; i < 3; i++) {
 498
 499                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 500
 501                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 502                 if (i == 0) {
 503                         snprintf(buf,256, "0\u00b0");
 504                 } else {
 505                         snprintf(buf,256, "%d\u00b0", (i * 45));
 506                 }
 507                 cairo_text_extents(cr, buf, &t_ext);
 508                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 509                 cairo_show_text(cr, buf);
 510
 511                 if (i == 0)
 512                         continue;
 513
 514
 515                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 516                 cairo_move_to(cr, 0.0,            y);
 517                 cairo_line_to(cr, _analysis_width, y);
 518
 519
 520                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 521
 522                 // label
 523                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 524                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 525                 cairo_text_extents(cr, buf, &t_ext);
 526                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 527                 cairo_show_text(cr, buf);
 528
 529                 // line
 530                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 531                 cairo_move_to(cr, 0.0,            y);
 532                 cairo_line_to(cr, _analysis_width, y);
 533
 534                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 535                 cairo_stroke(cr);
 536         }
 537 }
 538
 539 void
 540 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 541 {
 542         float x,y;
 543
 544         int prevX = 0;
 545         float avgY = 0.0;
 546         int avgNum = 0;
 547
 548         // float width  = w->get_width();
 549         float height = w->get_height();
 550
 551         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 552         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 553                 // x coordinate of bin i
 554                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 555                 x *= _analysis_width;
 556
 557                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 558
 559                 if ( i == 0 ) {
 560                         cairo_move_to(cr, x, y);
 561
 562                         avgY = 0;
 563                         avgNum = 0;
 564                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 565                         avgY = avgY/(float)avgNum;
 566                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 567                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 568                         cairo_line_to(cr, prevX, avgY);
 569                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 570
 571                         avgY = 0;
 572                         avgNum = 0;
 573
 574                 }
 575
 576                 prevX = rint(x);
 577                 avgY += y;
 578                 avgNum++;
 579         }
 580
 581         cairo_set_line_width (cr, 2.0);
 582         cairo_stroke(cr);
 583 }
 584
 585 void
 586 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 587 {
 588         if (_impulse_fft == 0) {
 589                 return;
 590         }
 591
 592         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 };
 593         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 594         float x;
 595
 596         cairo_set_line_width (cr, 1.5);
 597         cairo_set_font_size(cr, 9);
 598
 599         cairo_font_extents_t extents;
 600         cairo_font_extents(cr, &extents);
 601         // float fontXOffset = extents.descent + 1.0;
 602
 603         char buf[256];
 604
 605         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 606                 float bin = scales[i] / divisor;
 607
 608                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 609                 x *= _analysis_width;
 610
 611                 if (scales[i] < 1000.0) {
 612                         snprintf(buf, 256, "%0.0f", scales[i]);
 613                 } else {
 614                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 615                 }
 616
 617                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 618
 619                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 620                 cairo_move_to(cr, x - extents.height, 3.0);
 621
 622                 cairo_rotate(cr, M_PI / 2.0);
 623                 cairo_show_text(cr, buf);
 624                 cairo_rotate(cr, -M_PI / 2.0);
 625                 cairo_stroke(cr);
 626
 627                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 628                 cairo_move_to(cr, x, _analysis_height);
 629                 cairo_line_to(cr, x, 0.0);
 630                 cairo_stroke(cr);
 631         }
 632
 633         float y;
 634
 635         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 636         double dashes[] = { 3.0, 5.0 };
 637
 638         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 639                 snprintf(buf, 256, "+%0.0f", dB );
 640
 641                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 642                 //std::cerr << " y = " << y << std::endl;
 643                 y *= _analysis_height;
 644
 645                 if (dB != 0.0) {
 646                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 647                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 648                         cairo_show_text(cr, buf);
 649                         cairo_stroke(cr);
 650                 }
 651
 652                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 653                 cairo_move_to(cr, 0,     y);
 654                 cairo_line_to(cr, _analysis_width, y);
 655                 cairo_stroke(cr);
 656
 657                 if (dB == 0.0) {
 658                         cairo_set_dash(cr, dashes, 2, 0.0);
 659                 }
 660         }
 661
 662
 663
 664         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 665                 snprintf(buf, 256, "%0.0f", dB );
 666
 667                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 668                 y *= _analysis_height;
 669
 670                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 671                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 672                 cairo_show_text(cr, buf);
 673                 cairo_stroke(cr);
 674
 675                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 676                 cairo_move_to(cr, 0,     y);
 677                 cairo_line_to(cr, _analysis_width, y);
 678                 cairo_stroke(cr);
 679         }
 680
 681         cairo_set_dash(cr, 0, 0, 0.0);
 682
 683 }
 684
 685 inline float
 686 power_to_dB(float a)
 687 {
 688         return 10.0 * log10f(a);
 689 }
 690
 691 void
 692 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 693 {
 694         float x,y;
 695         int prevX = 0;
 696         float avgY = 0.0;
 697         int avgNum = 0;
 698
 699         // float width  = w->get_width();
 700         float height = w->get_height();
 701
 702         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 703         cairo_set_line_width (cr, 2.5);
 704
 705         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 706                 // x coordinate of bin i
 707                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 708                 x *= _analysis_width;
 709
 710                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 711
 712                 y = _analysis_height - _analysis_height*yCoeff;
 713
 714                 if ( i == 0 ) {
 715                         cairo_move_to(cr, x, y);
 716
 717                         avgY = 0;
 718                         avgNum = 0;
 719                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 720                         avgY = avgY/(float)avgNum;
 721                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 722                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 723                         cairo_line_to(cr, prevX, avgY);
 724                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 725
 726                         avgY = 0;
 727                         avgNum = 0;
 728
 729                 }
 730
 731                 prevX = rint(x);
 732                 avgY += y;
 733                 avgNum++;
 734         }
 735
 736         cairo_stroke(cr);
 737 }
 738
 739 void
 740 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 741 {
 742         float x,y;
 743
 744         int prevX = 0;
 745         float avgY = 0.0;
 746         int avgNum = 0;
 747
 748         // float width  = w->get_width();
 749         float height = w->get_height();
 750
 751         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 752         cairo_set_line_width (cr, 2.5);
 753
 754         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 755                 // x coordinate of bin i
 756                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 757                 x *= _analysis_width;
 758
 759                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 760                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 761                 float power = power_out - power_in;
 762
 763                 // for SaBer
 764                 /*
 765                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 766  - _signal_input_fft ->power_at_bin(i));
 767                 //p *= 1000000.0;
 768                 float power = (float)p;
 769
 770                 if ( (i % 1000) == 0) {
 771                         std::cerr << i << ": " << power << std::endl;
 772                 }
 773                 */
 774
 775                 if (isinf(power)) {
 776                         if (power < 0) {
 777                                 power = _min_dB - 1.0;
 778                         } else {
 779                                 power = _max_dB - 1.0;
 780                         }
 781                 } else if (isnan(power)) {
 782                         power = _min_dB - 1.0;
 783                 }
 784
 785                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 786
 787                 y = _analysis_height - _analysis_height*yCoeff;
 788
 789                 if ( i == 0 ) {
 790                         cairo_move_to(cr, x, y);
 791
 792                         avgY = 0;
 793                         avgNum = 0;
 794                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 795                         avgY = avgY/(float)avgNum;
 796                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 797                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 798                         cairo_line_to(cr, prevX, avgY);
 799
 800                         avgY = 0;
 801                         avgNum = 0;
 802
 803                 }
 804
 805                 prevX = rint(x);
 806                 avgY += y;
 807                 avgNum++;
 808         }
 809
 810         cairo_stroke(cr);
 811
 812
 813 }