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 <iostream>
  22 #include <cmath>
  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 #endif
  30
  31 #ifdef __APPLE__
  32 #define isinf(val) std::isinf((val))
  33 #define isnan(val) std::isnan((val))
  34 #endif
  35
  36 #include <gtkmm/box.h>
  37 #include <gtkmm/button.h>
  38 #include <gtkmm/checkbutton.h>
  39
  40 #include "ardour/audio_buffer.h"
  41 #include "ardour/data_type.h"
  42 #include "ardour/chan_mapping.h"
  43 #include "ardour/session.h"
  44
  45 #include "plugin_eq_gui.h"
  46 #include "fft.h"
  47 #include "ardour_ui.h"
  48 #include "gui_thread.h"
  49
  50 #include "i18n.h"
  51
  52 using namespace ARDOUR;
  53
  54 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  55         : _min_dB(-12.0)
  56         , _max_dB(+12.0)
  57         , _step_dB(3.0)
  58         , _impulse_fft(0)
  59         , _signal_input_fft(0)
  60         , _signal_output_fft(0)
  61         , _plugin_insert(pluginInsert)
  62 {
  63         _signal_analysis_running = false;
  64         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  65
  66         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  67         _log_max = log10f(1 + _log_coeff);
  68
  69         // Setup analysis drawing area
  70         _analysis_scale_surface = 0;
  71
  72         _analysis_area = new Gtk::DrawingArea();
  73         _analysis_width = 256.0;
  74         _analysis_height = 256.0;
  75         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  76
  77         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  78         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  79
  80         // dB selection
  81         dBScaleModel = Gtk::ListStore::create(dBColumns);
  82
  83         /* this grotty-looking cast allows compilation against gtkmm 2.24.0, which
  84            added a new ComboBox constructor.
  85         */
  86         dBScaleCombo = new Gtk::ComboBox ((Glib::RefPtr<Gtk::TreeModel> &) dBScaleModel);
  87         dBScaleCombo->set_title (_("dB scale"));
  88
  89 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  90         { \
  91                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  92                 row[dBColumns.dBMin]  = (MIN); \
  93                 row[dBColumns.dBMax]  = (MAX); \
  94                 row[dBColumns.dBStep] = (STEP); \
  95                 row[dBColumns.name]   = NAME; \
  96         }
  97
  98         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  99         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
 100         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
 101         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
 102         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
 103
 104 #undef ADD_DB_ROW
 105
 106         dBScaleCombo -> pack_start(dBColumns.name);
 107         dBScaleCombo -> set_active(1);
 108
 109         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
 110
 111         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 112
 113         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 114         dBSelectBin->add( *manage(dBComboLabel));
 115         dBSelectBin->add( *manage(dBScaleCombo));
 116
 117         // Phase checkbutton
 118         _phase_button = new Gtk::CheckButton (_("Show phase"));
 119         _phase_button->set_active(true);
 120         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 121
 122         // populate table
 123         attach( *manage(_analysis_area), 1, 3, 1, 2);
 124         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 125         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 126 }
 127
 128 PluginEqGui::~PluginEqGui()
 129 {
 130         stop_listening ();
 131
 132         if (_analysis_scale_surface) {
 133                 cairo_surface_destroy (_analysis_scale_surface);
 134         }
 135
 136         delete _impulse_fft;
 137         _impulse_fft = 0;
 138         delete _signal_input_fft;
 139         _signal_input_fft = 0;
 140         delete _signal_output_fft;
 141         _signal_output_fft = 0;
 142
 143         // all gui objects are *manage'd by the inherited Table object
 144 }
 145
 146 void
 147 PluginEqGui::start_listening ()
 148 {
 149         if (!_plugin) {
 150                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 151         }
 152
 153         _plugin->activate();
 154         set_buffer_size(4096, 16384);
 155         // Connect the realtime signal collection callback
 156         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 157 }
 158
 159 void
 160 PluginEqGui::stop_listening ()
 161 {
 162         analysis_connection.disconnect ();
 163         _plugin->deactivate ();
 164 }
 165
 166 void
 167 PluginEqGui::on_hide()
 168 {
 169         stop_updating();
 170         Gtk::Table::on_hide();
 171 }
 172
 173 void
 174 PluginEqGui::stop_updating()
 175 {
 176         if (_update_connection.connected()) {
 177                 _update_connection.disconnect();
 178         }
 179 }
 180
 181 void
 182 PluginEqGui::start_updating()
 183 {
 184         if (!_update_connection.connected() && is_visible()) {
 185                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 186         }
 187 }
 188
 189 void
 190 PluginEqGui::on_show()
 191 {
 192         Gtk::Table::on_show();
 193
 194         start_updating();
 195
 196         Gtk::Widget *toplevel = get_toplevel();
 197         if (toplevel) {
 198                 if (!_window_unmap_connection.connected()) {
 199                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 200                 }
 201
 202                 if (!_window_map_connection.connected()) {
 203                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 204                 }
 205         }
 206 }
 207
 208 void
 209 PluginEqGui::change_dB_scale()
 210 {
 211         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 212
 213         Gtk::TreeModel::Row row;
 214
 215         if(iter && (row = *iter)) {
 216                 _min_dB = row[dBColumns.dBMin];
 217                 _max_dB = row[dBColumns.dBMax];
 218                 _step_dB = row[dBColumns.dBStep];
 219
 220
 221                 redraw_scales();
 222         }
 223 }
 224
 225 void
 226 PluginEqGui::redraw_scales()
 227 {
 228
 229         if (_analysis_scale_surface) {
 230                 cairo_surface_destroy (_analysis_scale_surface);
 231                 _analysis_scale_surface = 0;
 232         }
 233
 234         _analysis_area->queue_draw();
 235
 236         // TODO: Add graph legend!
 237 }
 238
 239 void
 240 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 241 {
 242         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 243                 return;
 244         }
 245
 246         GTKArdour::FFT *tmp1 = _impulse_fft;
 247         GTKArdour::FFT *tmp2 = _signal_input_fft;
 248         GTKArdour::FFT *tmp3 = _signal_output_fft;
 249
 250         try {
 251                 _impulse_fft       = new GTKArdour::FFT(size);
 252                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 253                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 254         } catch( ... ) {
 255                 // Don't care about lost memory, we're screwed anyhow
 256                 _impulse_fft       = tmp1;
 257                 _signal_input_fft  = tmp2;
 258                 _signal_output_fft = tmp3;
 259                 throw;
 260         }
 261
 262         delete tmp1;
 263         delete tmp2;
 264         delete tmp3;
 265
 266         _buffer_size = size;
 267         _signal_buffer_size = signal_size;
 268
 269         ARDOUR::ChanCount count = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 270
 271         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 272                 _bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 273                 _collect_bufferset.ensure_buffers (*i, count.get (*i), _buffer_size);
 274         }
 275
 276         _bufferset.set_count (count);
 277         _collect_bufferset.set_count (count);
 278 }
 279
 280 void
 281 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 282 {
 283         _analysis_width  = (float)size.get_width();
 284         _analysis_height = (float)size.get_height();
 285
 286         if (_analysis_scale_surface) {
 287                 cairo_surface_destroy (_analysis_scale_surface);
 288                 _analysis_scale_surface = 0;
 289         }
 290 }
 291
 292 bool
 293 PluginEqGui::timeout_callback()
 294 {
 295         if (!_signal_analysis_running) {
 296                 _signal_analysis_running = true;
 297                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 298         }
 299         run_impulse_analysis();
 300
 301         return true;
 302 }
 303
 304 void
 305 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 306 {
 307         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out)
 308
 309         _signal_input_fft ->reset();
 310         _signal_output_fft->reset();
 311
 312         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 313                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 314         }
 315
 316         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 317                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 318         }
 319
 320         _signal_input_fft ->calculate();
 321         _signal_output_fft->calculate();
 322
 323         _signal_analysis_running = false;
 324
 325         // This signals calls expose_analysis_area()
 326         _analysis_area->queue_draw();
 327 }
 328
 329 void
 330 PluginEqGui::run_impulse_analysis()
 331 {
 332         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 333         ARDOUR_UI::instance()->get_process_buffers ();
 334
 335         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 336         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 337
 338         // Create the impulse, can't use silence() because consecutive calls won't work
 339         for (uint32_t i = 0; i < inputs; ++i) {
 340                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 341                 ARDOUR::Sample* d = buf.data();
 342                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 343                 *d = 1.0;
 344         }
 345
 346         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 347         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 348
 349         _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 350         framecnt_t f = _plugin->signal_latency ();
 351         // Adding user_latency() could be interesting
 352
 353         // Gather all output, taking latency into account.
 354         _impulse_fft->reset();
 355
 356         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 357         for (uint32_t i = 0; i < outputs; ++i) {
 358                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 359                 ARDOUR::Sample *d = buf.data();
 360                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 361         }
 362
 363         if (f == 0) {
 364                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 365                 for (uint32_t i = 0; i < outputs; ++i) {
 366                         memcpy(_collect_bufferset.get_audio(i).data(),
 367                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 368                 }
 369         } else {
 370                 //int C = 0;
 371                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 372                 framecnt_t target_offset = 0;
 373                 framecnt_t frames_left = _buffer_size; // refaktoroi
 374                 do {
 375                         if (f >= _buffer_size) {
 376                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 377                                 // there is no data in this buffer regarding to the input!
 378                                 f -= _buffer_size;
 379                         } else {
 380                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 381                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 382                                 //             we start at output offset "f"
 383                                 //             .. and copy "buffer size" - "f" - "offset" frames
 384
 385                                 framecnt_t length = _buffer_size - f - target_offset;
 386
 387                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 388                                 for (uint32_t i = 0; i < outputs; ++i) {
 389                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 390                                                 _bufferset.get_audio(i).data() + f,
 391                                                 length * sizeof(float));
 392                                 }
 393
 394                                 target_offset += length;
 395                                 frames_left   -= length;
 396                                 f = 0;
 397                         }
 398                         if (frames_left > 0) {
 399                                 // Silence the buffers
 400                                 for (uint32_t i = 0; i < inputs; ++i) {
 401                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 402                                         ARDOUR::Sample *d = buf.data();
 403                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 404                                 }
 405
 406                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 407                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 408                                 _plugin->connect_and_run(_bufferset, in_map, out_map, _buffer_size, 0);
 409                         }
 410                 } while ( frames_left > 0);
 411
 412         }
 413
 414
 415         for (uint32_t i = 0; i < outputs; ++i) {
 416                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 417         }
 418
 419         // normalize the output
 420         _impulse_fft->calculate();
 421
 422         // This signals calls expose_analysis_area()
 423         _analysis_area->queue_draw();
 424
 425         ARDOUR_UI::instance()->drop_process_buffers ();
 426 }
 427
 428 bool
 429 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 430 {
 431         redraw_analysis_area();
 432         return true;
 433 }
 434
 435 void
 436 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 437 {
 438         // TODO: check whether we need rounding
 439         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 440                                                              CAIRO_CONTENT_COLOR,
 441                                                              _analysis_width,
 442                                                              _analysis_height);
 443
 444         cairo_t *cr = cairo_create (_analysis_scale_surface);
 445
 446         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 447         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 448         cairo_fill(cr);
 449
 450
 451         draw_scales_power(_analysis_area, cr);
 452         if (_phase_button->get_active()) {
 453                 draw_scales_phase(_analysis_area, cr);
 454         }
 455
 456         cairo_destroy(cr);
 457
 458 }
 459
 460 void
 461 PluginEqGui::redraw_analysis_area()
 462 {
 463         cairo_t *cr;
 464
 465         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 466
 467         if (_analysis_scale_surface == 0) {
 468                 draw_analysis_scales(cr);
 469         }
 470
 471
 472         cairo_copy_page(cr);
 473
 474         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 475         cairo_paint(cr);
 476
 477         if (_phase_button->get_active()) {
 478                 plot_impulse_phase(_analysis_area, cr);
 479         }
 480         plot_impulse_amplitude(_analysis_area, cr);
 481
 482         // TODO: make this optional
 483         plot_signal_amplitude_difference(_analysis_area, cr);
 484
 485         cairo_destroy(cr);
 486
 487
 488 }
 489
 490 #define PHASE_PROPORTION 0.5
 491
 492 void
 493 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 494 {
 495         float y;
 496         cairo_font_extents_t extents;
 497         cairo_font_extents(cr, &extents);
 498
 499         char buf[256];
 500         cairo_text_extents_t t_ext;
 501
 502         for (uint32_t i = 0; i < 3; i++) {
 503
 504                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 505
 506                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 507                 if (i == 0) {
 508                         snprintf(buf,256, "0\u00b0");
 509                 } else {
 510                         snprintf(buf,256, "%d\u00b0", (i * 45));
 511                 }
 512                 cairo_text_extents(cr, buf, &t_ext);
 513                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 514                 cairo_show_text(cr, buf);
 515
 516                 if (i == 0)
 517                         continue;
 518
 519
 520                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 521                 cairo_move_to(cr, 0.0,            y);
 522                 cairo_line_to(cr, _analysis_width, y);
 523
 524
 525                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 526
 527                 // label
 528                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 529                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 530                 cairo_text_extents(cr, buf, &t_ext);
 531                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 532                 cairo_show_text(cr, buf);
 533
 534                 // line
 535                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 536                 cairo_move_to(cr, 0.0,            y);
 537                 cairo_line_to(cr, _analysis_width, y);
 538
 539                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 540                 cairo_stroke(cr);
 541         }
 542 }
 543
 544 void
 545 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 546 {
 547         float x,y;
 548
 549         int prevX = 0;
 550         float avgY = 0.0;
 551         int avgNum = 0;
 552
 553         // float width  = w->get_width();
 554         float height = w->get_height();
 555
 556         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 557         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 558                 // x coordinate of bin i
 559                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 560                 x *= _analysis_width;
 561
 562                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 563
 564                 if ( i == 0 ) {
 565                         cairo_move_to(cr, x, y);
 566
 567                         avgY = 0;
 568                         avgNum = 0;
 569                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 570                         avgY = avgY/(float)avgNum;
 571                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 572                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 573                         cairo_line_to(cr, prevX, avgY);
 574                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 575
 576                         avgY = 0;
 577                         avgNum = 0;
 578
 579                 }
 580
 581                 prevX = rint(x);
 582                 avgY += y;
 583                 avgNum++;
 584         }
 585
 586         cairo_set_line_width (cr, 2.0);
 587         cairo_stroke(cr);
 588 }
 589
 590 void
 591 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 592 {
 593         if (_impulse_fft == 0) {
 594                 return;
 595         }
 596
 597         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 };
 598         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 599         float x;
 600
 601         cairo_set_line_width (cr, 1.5);
 602         cairo_set_font_size(cr, 9);
 603
 604         cairo_font_extents_t extents;
 605         cairo_font_extents(cr, &extents);
 606         // float fontXOffset = extents.descent + 1.0;
 607
 608         char buf[256];
 609
 610         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 611                 float bin = scales[i] / divisor;
 612
 613                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 614                 x *= _analysis_width;
 615
 616                 if (scales[i] < 1000.0) {
 617                         snprintf(buf, 256, "%0.0f", scales[i]);
 618                 } else {
 619                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 620                 }
 621
 622                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 623
 624                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 625                 cairo_move_to(cr, x - extents.height, 3.0);
 626
 627                 cairo_rotate(cr, M_PI / 2.0);
 628                 cairo_show_text(cr, buf);
 629                 cairo_rotate(cr, -M_PI / 2.0);
 630                 cairo_stroke(cr);
 631
 632                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 633                 cairo_move_to(cr, x, _analysis_height);
 634                 cairo_line_to(cr, x, 0.0);
 635                 cairo_stroke(cr);
 636         }
 637
 638         float y;
 639
 640         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 641         double dashes[] = { 3.0, 5.0 };
 642
 643         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 644                 snprintf(buf, 256, "+%0.0f", dB );
 645
 646                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 647                 //std::cerr << " y = " << y << std::endl;
 648                 y *= _analysis_height;
 649
 650                 if (dB != 0.0) {
 651                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 652                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 653                         cairo_show_text(cr, buf);
 654                         cairo_stroke(cr);
 655                 }
 656
 657                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 658                 cairo_move_to(cr, 0,     y);
 659                 cairo_line_to(cr, _analysis_width, y);
 660                 cairo_stroke(cr);
 661
 662                 if (dB == 0.0) {
 663                         cairo_set_dash(cr, dashes, 2, 0.0);
 664                 }
 665         }
 666
 667
 668
 669         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 670                 snprintf(buf, 256, "%0.0f", dB );
 671
 672                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 673                 y *= _analysis_height;
 674
 675                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 676                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 677                 cairo_show_text(cr, buf);
 678                 cairo_stroke(cr);
 679
 680                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 681                 cairo_move_to(cr, 0,     y);
 682                 cairo_line_to(cr, _analysis_width, y);
 683                 cairo_stroke(cr);
 684         }
 685
 686         cairo_set_dash(cr, 0, 0, 0.0);
 687
 688 }
 689
 690 inline float
 691 power_to_dB(float a)
 692 {
 693         return 10.0 * log10f(a);
 694 }
 695
 696 void
 697 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 698 {
 699         float x,y;
 700         int prevX = 0;
 701         float avgY = 0.0;
 702         int avgNum = 0;
 703
 704         // float width  = w->get_width();
 705         float height = w->get_height();
 706
 707         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 708         cairo_set_line_width (cr, 2.5);
 709
 710         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 711                 // x coordinate of bin i
 712                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 713                 x *= _analysis_width;
 714
 715                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 716
 717                 y = _analysis_height - _analysis_height*yCoeff;
 718
 719                 if ( i == 0 ) {
 720                         cairo_move_to(cr, x, y);
 721
 722                         avgY = 0;
 723                         avgNum = 0;
 724                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 725                         avgY = avgY/(float)avgNum;
 726                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 727                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 728                         cairo_line_to(cr, prevX, avgY);
 729                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 730
 731                         avgY = 0;
 732                         avgNum = 0;
 733
 734                 }
 735
 736                 prevX = rint(x);
 737                 avgY += y;
 738                 avgNum++;
 739         }
 740
 741         cairo_stroke(cr);
 742 }
 743
 744 void
 745 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 746 {
 747         float x,y;
 748
 749         int prevX = 0;
 750         float avgY = 0.0;
 751         int avgNum = 0;
 752
 753         // float width  = w->get_width();
 754         float height = w->get_height();
 755
 756         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 757         cairo_set_line_width (cr, 2.5);
 758
 759         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 760                 // x coordinate of bin i
 761                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 762                 x *= _analysis_width;
 763
 764                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 765                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 766                 float power = power_out - power_in;
 767
 768                 // for SaBer
 769                 /*
 770                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 771  - _signal_input_fft ->power_at_bin(i));
 772                 //p *= 1000000.0;
 773                 float power = (float)p;
 774
 775                 if ( (i % 1000) == 0) {
 776                         std::cerr << i << ": " << power << std::endl;
 777                 }
 778                 */
 779
 780                 if (isinf(power)) {
 781                         if (power < 0) {
 782                                 power = _min_dB - 1.0;
 783                         } else {
 784                                 power = _max_dB - 1.0;
 785                         }
 786                 } else if (isnan(power)) {
 787                         power = _min_dB - 1.0;
 788                 }
 789
 790                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 791
 792                 y = _analysis_height - _analysis_height*yCoeff;
 793
 794                 if ( i == 0 ) {
 795                         cairo_move_to(cr, x, y);
 796
 797                         avgY = 0;
 798                         avgNum = 0;
 799                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 800                         avgY = avgY/(float)avgNum;
 801                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 802                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 803                         cairo_line_to(cr, prevX, avgY);
 804
 805                         avgY = 0;
 806                         avgNum = 0;
 807
 808                 }
 809
 810                 prevX = rint(x);
 811                 avgY += y;
 812                 avgNum++;
 813         }
 814
 815         cairo_stroke(cr);
 816
 817
 818 }