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 <math.h>
  22 #include <iostream>
  23
  24 #ifdef COMPILER_MSVC
  25 #include <float.h>
  26 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
  27 #define ISINF(val) !((bool)_finite((double)val))
  28 #define ISNAN(val) (bool)_isnan((double)val)
  29 #else
  30 #define ISINF(val) std::isinf((val))
  31 #define ISNAN(val) std::isnan((val))
  32 #endif
  33
  34 #include <gtkmm/box.h>
  35 #include <gtkmm/button.h>
  36 #include <gtkmm/checkbutton.h>
  37
  38 #include "ardour/audio_buffer.h"
  39 #include "ardour/data_type.h"
  40 #include "ardour/chan_mapping.h"
  41 #include "ardour/session.h"
  42
  43 #include "plugin_eq_gui.h"
  44 #include "fft.h"
  45 #include "ardour_ui.h"
  46 #include "gui_thread.h"
  47
  48 #include "i18n.h"
  49
  50 using namespace ARDOUR;
  51
  52 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  53         : _min_dB(-12.0)
  54         , _max_dB(+12.0)
  55         , _step_dB(3.0)
  56         , _impulse_fft(0)
  57         , _signal_input_fft(0)
  58         , _signal_output_fft(0)
  59         , _plugin_insert(pluginInsert)
  60 {
  61         _signal_analysis_running = false;
  62         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  63
  64         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  65         _log_max = log10f(1 + _log_coeff);
  66
  67         // Setup analysis drawing area
  68         _analysis_scale_surface = 0;
  69
  70         _analysis_area = new Gtk::DrawingArea();
  71         _analysis_width = 256.0;
  72         _analysis_height = 256.0;
  73         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  74
  75         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  76         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  77
  78         // dB selection
  79         dBScaleModel = Gtk::ListStore::create(dBColumns);
  80
  81         /* this grotty-looking cast allows compilation against gtkmm 2.24.0, which
  82            added a new ComboBox constructor.
  83         */
  84         dBScaleCombo = new Gtk::ComboBox ((Glib::RefPtr<Gtk::TreeModel> &) dBScaleModel);
  85         dBScaleCombo->set_title (_("dB scale"));
  86
  87 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  88         { \
  89                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  90                 row[dBColumns.dBMin]  = (MIN); \
  91                 row[dBColumns.dBMax]  = (MAX); \
  92                 row[dBColumns.dBStep] = (STEP); \
  93                 row[dBColumns.name]   = NAME; \
  94         }
  95
  96         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  97         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
  98         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
  99         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
 100         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
 101
 102 #undef ADD_DB_ROW
 103
 104         dBScaleCombo -> pack_start(dBColumns.name);
 105         dBScaleCombo -> set_active(1);
 106
 107         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
 108
 109         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 110
 111         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 112         dBSelectBin->add( *manage(dBComboLabel));
 113         dBSelectBin->add( *manage(dBScaleCombo));
 114
 115         // Phase checkbutton
 116         _phase_button = new Gtk::CheckButton (_("Show phase"));
 117         _phase_button->set_active(true);
 118         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 119
 120         // populate table
 121         attach( *manage(_analysis_area), 1, 3, 1, 2);
 122         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 123         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 124 }
 125
 126 PluginEqGui::~PluginEqGui()
 127 {
 128         stop_listening ();
 129
 130         if (_analysis_scale_surface) {
 131                 cairo_surface_destroy (_analysis_scale_surface);
 132         }
 133
 134         delete _impulse_fft;
 135         _impulse_fft = 0;
 136         delete _signal_input_fft;
 137         _signal_input_fft = 0;
 138         delete _signal_output_fft;
 139         _signal_output_fft = 0;
 140
 141         // all gui objects are *manage'd by the inherited Table object
 142 }
 143
 144 void
 145 PluginEqGui::start_listening ()
 146 {
 147         if (!_plugin) {
 148                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 149         }
 150
 151         _plugin->activate();
 152         set_buffer_size(4096, 16384);
 153         // Connect the realtime signal collection callback
 154         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 155 }
 156
 157 void
 158 PluginEqGui::stop_listening ()
 159 {
 160         analysis_connection.disconnect ();
 161         _plugin->deactivate ();
 162 }
 163
 164 void
 165 PluginEqGui::on_hide()
 166 {
 167         stop_updating();
 168         Gtk::Table::on_hide();
 169 }
 170
 171 void
 172 PluginEqGui::stop_updating()
 173 {
 174         if (_update_connection.connected()) {
 175                 _update_connection.disconnect();
 176         }
 177 }
 178
 179 void
 180 PluginEqGui::start_updating()
 181 {
 182         if (!_update_connection.connected() && is_visible()) {
 183                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 184         }
 185 }
 186
 187 void
 188 PluginEqGui::on_show()
 189 {
 190         Gtk::Table::on_show();
 191
 192         start_updating();
 193
 194         Gtk::Widget *toplevel = get_toplevel();
 195         if (toplevel) {
 196                 if (!_window_unmap_connection.connected()) {
 197                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 198                 }
 199
 200                 if (!_window_map_connection.connected()) {
 201                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 202                 }
 203         }
 204 }
 205
 206 void
 207 PluginEqGui::change_dB_scale()
 208 {
 209         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 210
 211         Gtk::TreeModel::Row row;
 212
 213         if(iter && (row = *iter)) {
 214                 _min_dB = row[dBColumns.dBMin];
 215                 _max_dB = row[dBColumns.dBMax];
 216                 _step_dB = row[dBColumns.dBStep];
 217
 218
 219                 redraw_scales();
 220         }
 221 }
 222
 223 void
 224 PluginEqGui::redraw_scales()
 225 {
 226
 227         if (_analysis_scale_surface) {
 228                 cairo_surface_destroy (_analysis_scale_surface);
 229                 _analysis_scale_surface = 0;
 230         }
 231
 232         _analysis_area->queue_draw();
 233
 234         // TODO: Add graph legend!
 235 }
 236
 237 void
 238 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 239 {
 240         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 241                 return;
 242         }
 243
 244         GTKArdour::FFT *tmp1 = _impulse_fft;
 245         GTKArdour::FFT *tmp2 = _signal_input_fft;
 246         GTKArdour::FFT *tmp3 = _signal_output_fft;
 247
 248         try {
 249                 _impulse_fft       = new GTKArdour::FFT(size);
 250                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 251                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 252         } catch( ... ) {
 253                 // Don't care about lost memory, we're screwed anyhow
 254                 _impulse_fft       = tmp1;
 255                 _signal_input_fft  = tmp2;
 256                 _signal_output_fft = tmp3;
 257                 throw;
 258         }
 259
 260         delete tmp1;
 261         delete tmp2;
 262         delete tmp3;
 263
 264         _buffer_size = size;
 265         _signal_buffer_size = signal_size;
 266
 267         ARDOUR::ChanCount count = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 268
 269         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 270                 _bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 271                 _collect_bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 272         }
 273
 274         _bufferset.set_count (count);
 275         _collect_bufferset.set_count (count);
 276 }
 277
 278 void
 279 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 280 {
 281         _analysis_width  = (float)size.get_width();
 282         _analysis_height = (float)size.get_height();
 283
 284         if (_analysis_scale_surface) {
 285                 cairo_surface_destroy (_analysis_scale_surface);
 286                 _analysis_scale_surface = 0;
 287         }
 288 }
 289
 290 bool
 291 PluginEqGui::timeout_callback()
 292 {
 293         if (!_signal_analysis_running) {
 294                 _signal_analysis_running = true;
 295                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 296         }
 297         run_impulse_analysis();
 298
 299         return true;
 300 }
 301
 302 void
 303 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 304 {
 305         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out)
 306
 307         _signal_input_fft ->reset();
 308         _signal_output_fft->reset();
 309
 310         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 311                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 312         }
 313
 314         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 315                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 316         }
 317
 318         _signal_input_fft ->calculate();
 319         _signal_output_fft->calculate();
 320
 321         _signal_analysis_running = false;
 322
 323         // This signals calls expose_analysis_area()
 324         _analysis_area->queue_draw();
 325 }
 326
 327 void
 328 PluginEqGui::run_impulse_analysis()
 329 {
 330         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 331         ARDOUR_UI::instance()->get_process_buffers ();
 332
 333         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 334         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 335
 336         // Create the impulse, can't use silence() because consecutive calls won't work
 337         for (uint32_t i = 0; i < inputs; ++i) {
 338                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 339                 ARDOUR::Sample* d = buf.data();
 340                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 341                 *d = 1.0;
 342         }
 343
 344         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 345         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 346
 347         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 348         framecnt_t f = _plugin->signal_latency ();
 349         // Adding user_latency() could be interesting
 350
 351         // Gather all output, taking latency into account.
 352         _impulse_fft->reset();
 353
 354         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 355         for (uint32_t i = 0; i < outputs; ++i) {
 356                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 357                 ARDOUR::Sample *d = buf.data();
 358                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 359         }
 360
 361         if (f == 0) {
 362                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 363                 for (uint32_t i = 0; i < outputs; ++i) {
 364                         memcpy(_collect_bufferset.get_audio(i).data(),
 365                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 366                 }
 367         } else {
 368                 //int C = 0;
 369                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 370                 framecnt_t target_offset = 0;
 371                 framecnt_t frames_left = _buffer_size; // refaktoroi
 372                 do {
 373                         if (f >= _buffer_size) {
 374                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 375                                 // there is no data in this buffer regarding to the input!
 376                                 f -= _buffer_size;
 377                         } else {
 378                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 379                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 380                                 //             we start at output offset "f"
 381                                 //             .. and copy "buffer size" - "f" - "offset" frames
 382
 383                                 framecnt_t length = _buffer_size - f - target_offset;
 384
 385                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 386                                 for (uint32_t i = 0; i < outputs; ++i) {
 387                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 388                                                 _bufferset.get_audio(i).data() + f,
 389                                                 length * sizeof(float));
 390                                 }
 391
 392                                 target_offset += length;
 393                                 frames_left   -= length;
 394                                 f = 0;
 395                         }
 396                         if (frames_left > 0) {
 397                                 // Silence the buffers
 398                                 for (uint32_t i = 0; i < inputs; ++i) {
 399                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 400                                         ARDOUR::Sample *d = buf.data();
 401                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 402                                 }
 403
 404                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 405                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 406                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 407                         }
 408                 } while ( frames_left > 0);
 409
 410         }
 411
 412
 413         for (uint32_t i = 0; i < outputs; ++i) {
 414                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 415         }
 416
 417         // normalize the output
 418         _impulse_fft->calculate();
 419
 420         // This signals calls expose_analysis_area()
 421         _analysis_area->queue_draw();
 422
 423         ARDOUR_UI::instance()->drop_process_buffers ();
 424 }
 425
 426 bool
 427 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 428 {
 429         redraw_analysis_area();
 430         return true;
 431 }
 432
 433 void
 434 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 435 {
 436         // TODO: check whether we need rounding
 437         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 438                                                              CAIRO_CONTENT_COLOR,
 439                                                              _analysis_width,
 440                                                              _analysis_height);
 441
 442         cairo_t *cr = cairo_create (_analysis_scale_surface);
 443
 444         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 445         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 446         cairo_fill(cr);
 447
 448
 449         draw_scales_power(_analysis_area, cr);
 450         if (_phase_button->get_active()) {
 451                 draw_scales_phase(_analysis_area, cr);
 452         }
 453
 454         cairo_destroy(cr);
 455
 456 }
 457
 458 void
 459 PluginEqGui::redraw_analysis_area()
 460 {
 461         cairo_t *cr;
 462
 463         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 464
 465         if (_analysis_scale_surface == 0) {
 466                 draw_analysis_scales(cr);
 467         }
 468
 469
 470         cairo_copy_page(cr);
 471
 472         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 473         cairo_paint(cr);
 474
 475         if (_phase_button->get_active()) {
 476                 plot_impulse_phase(_analysis_area, cr);
 477         }
 478         plot_impulse_amplitude(_analysis_area, cr);
 479
 480         // TODO: make this optional
 481         plot_signal_amplitude_difference(_analysis_area, cr);
 482
 483         cairo_destroy(cr);
 484
 485
 486 }
 487
 488 #define PHASE_PROPORTION 0.5
 489
 490 void
 491 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 492 {
 493         float y;
 494         cairo_font_extents_t extents;
 495         cairo_font_extents(cr, &extents);
 496
 497         char buf[256];
 498         cairo_text_extents_t t_ext;
 499
 500         for (uint32_t i = 0; i < 3; i++) {
 501
 502                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 503
 504                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 505                 if (i == 0) {
 506                         snprintf(buf,256, "0\u00b0");
 507                 } else {
 508                         snprintf(buf,256, "%d\u00b0", (i * 45));
 509                 }
 510                 cairo_text_extents(cr, buf, &t_ext);
 511                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 512                 cairo_show_text(cr, buf);
 513
 514                 if (i == 0)
 515                         continue;
 516
 517
 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
 523                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 524
 525                 // label
 526                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 527                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 528                 cairo_text_extents(cr, buf, &t_ext);
 529                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 530                 cairo_show_text(cr, buf);
 531
 532                 // line
 533                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 534                 cairo_move_to(cr, 0.0,            y);
 535                 cairo_line_to(cr, _analysis_width, y);
 536
 537                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 538                 cairo_stroke(cr);
 539         }
 540 }
 541
 542 void
 543 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 544 {
 545         float x,y;
 546
 547         int prevX = 0;
 548         float avgY = 0.0;
 549         int avgNum = 0;
 550
 551         // float width  = w->get_width();
 552         float height = w->get_height();
 553
 554         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 555         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 556                 // x coordinate of bin i
 557                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 558                 x *= _analysis_width;
 559
 560                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 561
 562                 if ( i == 0 ) {
 563                         cairo_move_to(cr, x, y);
 564
 565                         avgY = 0;
 566                         avgNum = 0;
 567                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 568                         avgY = avgY/(float)avgNum;
 569                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 570                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 571                         cairo_line_to(cr, prevX, avgY);
 572                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 573
 574                         avgY = 0;
 575                         avgNum = 0;
 576
 577                 }
 578
 579                 prevX = rint(x);
 580                 avgY += y;
 581                 avgNum++;
 582         }
 583
 584         cairo_set_line_width (cr, 2.0);
 585         cairo_stroke(cr);
 586 }
 587
 588 void
 589 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 590 {
 591         if (_impulse_fft == 0) {
 592                 return;
 593         }
 594
 595         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 };
 596         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 597         float x;
 598
 599         cairo_set_line_width (cr, 1.5);
 600         cairo_set_font_size(cr, 9);
 601
 602         cairo_font_extents_t extents;
 603         cairo_font_extents(cr, &extents);
 604         // float fontXOffset = extents.descent + 1.0;
 605
 606         char buf[256];
 607
 608         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 609                 float bin = scales[i] / divisor;
 610
 611                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 612                 x *= _analysis_width;
 613
 614                 if (scales[i] < 1000.0) {
 615                         snprintf(buf, 256, "%0.0f", scales[i]);
 616                 } else {
 617                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 618                 }
 619
 620                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 621
 622                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 623                 cairo_move_to(cr, x - extents.height, 3.0);
 624
 625                 cairo_rotate(cr, M_PI / 2.0);
 626                 cairo_show_text(cr, buf);
 627                 cairo_rotate(cr, -M_PI / 2.0);
 628                 cairo_stroke(cr);
 629
 630                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 631                 cairo_move_to(cr, x, _analysis_height);
 632                 cairo_line_to(cr, x, 0.0);
 633                 cairo_stroke(cr);
 634         }
 635
 636         float y;
 637
 638         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 639         double dashes[] = { 3.0, 5.0 };
 640
 641         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 642                 snprintf(buf, 256, "+%0.0f", dB );
 643
 644                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 645                 //std::cerr << " y = " << y << std::endl;
 646                 y *= _analysis_height;
 647
 648                 if (dB != 0.0) {
 649                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 650                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 651                         cairo_show_text(cr, buf);
 652                         cairo_stroke(cr);
 653                 }
 654
 655                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 656                 cairo_move_to(cr, 0,     y);
 657                 cairo_line_to(cr, _analysis_width, y);
 658                 cairo_stroke(cr);
 659
 660                 if (dB == 0.0) {
 661                         cairo_set_dash(cr, dashes, 2, 0.0);
 662                 }
 663         }
 664
 665
 666
 667         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 668                 snprintf(buf, 256, "%0.0f", dB );
 669
 670                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 671                 y *= _analysis_height;
 672
 673                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 674                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 675                 cairo_show_text(cr, buf);
 676                 cairo_stroke(cr);
 677
 678                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 679                 cairo_move_to(cr, 0,     y);
 680                 cairo_line_to(cr, _analysis_width, y);
 681                 cairo_stroke(cr);
 682         }
 683
 684         cairo_set_dash(cr, 0, 0, 0.0);
 685
 686 }
 687
 688 inline float
 689 power_to_dB(float a)
 690 {
 691         return 10.0 * log10f(a);
 692 }
 693
 694 void
 695 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 696 {
 697         float x,y;
 698         int prevX = 0;
 699         float avgY = 0.0;
 700         int avgNum = 0;
 701
 702         // float width  = w->get_width();
 703         float height = w->get_height();
 704
 705         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 706         cairo_set_line_width (cr, 2.5);
 707
 708         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 709                 // x coordinate of bin i
 710                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 711                 x *= _analysis_width;
 712
 713                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 714
 715                 y = _analysis_height - _analysis_height*yCoeff;
 716
 717                 if ( i == 0 ) {
 718                         cairo_move_to(cr, x, y);
 719
 720                         avgY = 0;
 721                         avgNum = 0;
 722                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 723                         avgY = avgY/(float)avgNum;
 724                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 725                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 726                         cairo_line_to(cr, prevX, avgY);
 727                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 728
 729                         avgY = 0;
 730                         avgNum = 0;
 731
 732                 }
 733
 734                 prevX = rint(x);
 735                 avgY += y;
 736                 avgNum++;
 737         }
 738
 739         cairo_stroke(cr);
 740 }
 741
 742 void
 743 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 744 {
 745         float x,y;
 746
 747         int prevX = 0;
 748         float avgY = 0.0;
 749         int avgNum = 0;
 750
 751         // float width  = w->get_width();
 752         float height = w->get_height();
 753
 754         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 755         cairo_set_line_width (cr, 2.5);
 756
 757         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 758                 // x coordinate of bin i
 759                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 760                 x *= _analysis_width;
 761
 762                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 763                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 764                 float power = power_out - power_in;
 765
 766                 // for SaBer
 767                 /*
 768                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 769  - _signal_input_fft ->power_at_bin(i));
 770                 //p *= 1000000.0;
 771                 float power = (float)p;
 772
 773                 if ( (i % 1000) == 0) {
 774                         std::cerr << i << ": " << power << std::endl;
 775                 }
 776                 */
 777
 778                 if (ISINF(power)) {
 779                         if (power < 0) {
 780                                 power = _min_dB - 1.0;
 781                         } else {
 782                                 power = _max_dB - 1.0;
 783                         }
 784                 } else if (ISNAN(power)) {
 785                         power = _min_dB - 1.0;
 786                 }
 787
 788                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 789
 790                 y = _analysis_height - _analysis_height*yCoeff;
 791
 792                 if ( i == 0 ) {
 793                         cairo_move_to(cr, x, y);
 794
 795                         avgY = 0;
 796                         avgNum = 0;
 797                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 798                         avgY = avgY/(float)avgNum;
 799                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 800                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 801                         cairo_line_to(cr, prevX, avgY);
 802
 803                         avgY = 0;
 804                         avgNum = 0;
 805
 806                 }
 807
 808                 prevX = rint(x);
 809                 avgY += y;
 810                 avgNum++;
 811         }
 812
 813         cairo_stroke(cr);
 814
 815
 816 }