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/plugin_insert.h"
  42 #include "ardour/session.h"
  43
  44 #include "plugin_eq_gui.h"
  45 #include "fft.h"
  46 #include "ardour_ui.h"
  47 #include "gui_thread.h"
  48
  49 #include "i18n.h"
  50
  51 using namespace ARDOUR;
  52
  53 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  54         : _min_dB(-12.0)
  55         , _max_dB(+12.0)
  56         , _step_dB(3.0)
  57         , _buffer_size(0)
  58         , _signal_buffer_size(0)
  59         , _impulse_fft(0)
  60         , _signal_input_fft(0)
  61         , _signal_output_fft(0)
  62         , _plugin_insert(pluginInsert)
  63 {
  64         _signal_analysis_running = false;
  65         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  66
  67         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  68         _log_max = log10f(1 + _log_coeff);
  69
  70         // Setup analysis drawing area
  71         _analysis_scale_surface = 0;
  72
  73         _analysis_area = new Gtk::DrawingArea();
  74         _analysis_width = 256.0;
  75         _analysis_height = 256.0;
  76         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  77
  78         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  79         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  80
  81         // dB selection
  82         dBScaleModel = Gtk::ListStore::create(dBColumns);
  83
  84         dBScaleCombo = new Gtk::ComboBox (dBScaleModel, false);
  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->set_block_size (_buffer_size);
 348         _plugin->connect_and_run(_bufferset, 0, _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 349         framecnt_t f = _plugin->signal_latency ();
 350         // Adding user_latency() could be interesting
 351
 352         // Gather all output, taking latency into account.
 353         _impulse_fft->reset();
 354
 355         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 356         for (uint32_t i = 0; i < outputs; ++i) {
 357                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 358                 ARDOUR::Sample *d = buf.data();
 359                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 360         }
 361
 362         if (f == 0) {
 363                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 364                 for (uint32_t i = 0; i < outputs; ++i) {
 365                         memcpy(_collect_bufferset.get_audio(i).data(),
 366                                _bufferset.get_audio(i).data(), _buffer_size * sizeof(float));
 367                 }
 368         } else {
 369                 //int C = 0;
 370                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 371                 framecnt_t target_offset = 0;
 372                 framecnt_t frames_left = _buffer_size; // refaktoroi
 373                 do {
 374                         if (f >= _buffer_size) {
 375                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 376                                 // there is no data in this buffer regarding to the input!
 377                                 f -= _buffer_size;
 378                         } else {
 379                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 380                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 381                                 //             we start at output offset "f"
 382                                 //             .. and copy "buffer size" - "f" - "offset" frames
 383
 384                                 framecnt_t length = _buffer_size - f - target_offset;
 385
 386                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 387                                 for (uint32_t i = 0; i < outputs; ++i) {
 388                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 389                                                 _bufferset.get_audio(i).data() + f,
 390                                                 length * sizeof(float));
 391                                 }
 392
 393                                 target_offset += length;
 394                                 frames_left   -= length;
 395                                 f = 0;
 396                         }
 397                         if (frames_left > 0) {
 398                                 // Silence the buffers
 399                                 for (uint32_t i = 0; i < inputs; ++i) {
 400                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 401                                         ARDOUR::Sample *d = buf.data();
 402                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 403                                 }
 404
 405                                 in_map  = ARDOUR::ChanMapping(_plugin->get_info()->n_inputs);
 406                                 out_map = ARDOUR::ChanMapping(_plugin->get_info()->n_outputs);
 407                                 _plugin->connect_and_run (_bufferset, target_offset, target_offset + _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 408                         }
 409                 } while ( frames_left > 0);
 410
 411         }
 412
 413
 414         for (uint32_t i = 0; i < outputs; ++i) {
 415                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 416         }
 417
 418         // normalize the output
 419         _impulse_fft->calculate();
 420
 421         // This signals calls expose_analysis_area()
 422         _analysis_area->queue_draw();
 423
 424         ARDOUR_UI::instance()->drop_process_buffers ();
 425 }
 426
 427 bool
 428 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 429 {
 430         redraw_analysis_area();
 431         return true;
 432 }
 433
 434 void
 435 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 436 {
 437         // TODO: check whether we need rounding
 438         _analysis_scale_surface = cairo_surface_create_similar(cairo_get_target(ref_cr),
 439                                                              CAIRO_CONTENT_COLOR,
 440                                                              _analysis_width,
 441                                                              _analysis_height);
 442
 443         cairo_t *cr = cairo_create (_analysis_scale_surface);
 444
 445         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 446         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 447         cairo_fill(cr);
 448
 449
 450         draw_scales_power(_analysis_area, cr);
 451         if (_phase_button->get_active()) {
 452                 draw_scales_phase(_analysis_area, cr);
 453         }
 454
 455         cairo_destroy(cr);
 456
 457 }
 458
 459 void
 460 PluginEqGui::redraw_analysis_area()
 461 {
 462         cairo_t *cr;
 463
 464         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 465
 466         if (_analysis_scale_surface == 0) {
 467                 draw_analysis_scales(cr);
 468         }
 469
 470
 471         cairo_copy_page(cr);
 472
 473         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 474         cairo_paint(cr);
 475
 476         if (_phase_button->get_active()) {
 477                 plot_impulse_phase(_analysis_area, cr);
 478         }
 479         plot_impulse_amplitude(_analysis_area, cr);
 480
 481         // TODO: make this optional
 482         plot_signal_amplitude_difference(_analysis_area, cr);
 483
 484         cairo_destroy(cr);
 485
 486
 487 }
 488
 489 #define PHASE_PROPORTION 0.5
 490
 491 void
 492 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 493 {
 494         float y;
 495         cairo_font_extents_t extents;
 496         cairo_font_extents(cr, &extents);
 497
 498         char buf[256];
 499         cairo_text_extents_t t_ext;
 500
 501         for (uint32_t i = 0; i < 3; i++) {
 502
 503                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 504
 505                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 506                 if (i == 0) {
 507                         snprintf(buf,256, "0\u00b0");
 508                 } else {
 509                         snprintf(buf,256, "%d\u00b0", (i * 45));
 510                 }
 511                 cairo_text_extents(cr, buf, &t_ext);
 512                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 513                 cairo_show_text(cr, buf);
 514
 515                 if (i == 0)
 516                         continue;
 517
 518
 519                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 520                 cairo_move_to(cr, 0.0,            y);
 521                 cairo_line_to(cr, _analysis_width, y);
 522
 523
 524                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 525
 526                 // label
 527                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 528                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 529                 cairo_text_extents(cr, buf, &t_ext);
 530                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 531                 cairo_show_text(cr, buf);
 532
 533                 // line
 534                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 535                 cairo_move_to(cr, 0.0,            y);
 536                 cairo_line_to(cr, _analysis_width, y);
 537
 538                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 539                 cairo_stroke(cr);
 540         }
 541 }
 542
 543 void
 544 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 545 {
 546         float x,y;
 547
 548         int prevX = 0;
 549         float avgY = 0.0;
 550         int avgNum = 0;
 551
 552         // float width  = w->get_width();
 553         float height = w->get_height();
 554
 555         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 556         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 557                 // x coordinate of bin i
 558                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 559                 x *= _analysis_width;
 560
 561                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 562
 563                 if ( i == 0 ) {
 564                         cairo_move_to(cr, x, y);
 565
 566                         avgY = 0;
 567                         avgNum = 0;
 568                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 569                         avgY = avgY/(float)avgNum;
 570                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 571                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 572                         cairo_line_to(cr, prevX, avgY);
 573                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 574
 575                         avgY = 0;
 576                         avgNum = 0;
 577
 578                 }
 579
 580                 prevX = rint(x);
 581                 avgY += y;
 582                 avgNum++;
 583         }
 584
 585         cairo_set_line_width (cr, 2.0);
 586         cairo_stroke(cr);
 587 }
 588
 589 void
 590 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 591 {
 592         if (_impulse_fft == 0) {
 593                 return;
 594         }
 595
 596         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 };
 597         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 598         float x;
 599
 600         cairo_set_line_width (cr, 1.5);
 601         cairo_set_font_size(cr, 9);
 602
 603         cairo_font_extents_t extents;
 604         cairo_font_extents(cr, &extents);
 605         // float fontXOffset = extents.descent + 1.0;
 606
 607         char buf[256];
 608
 609         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 610                 float bin = scales[i] / divisor;
 611
 612                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 613                 x *= _analysis_width;
 614
 615                 if (scales[i] < 1000.0) {
 616                         snprintf(buf, 256, "%0.0f", scales[i]);
 617                 } else {
 618                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 619                 }
 620
 621                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 622
 623                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 624                 cairo_move_to(cr, x - extents.height, 3.0);
 625
 626                 cairo_rotate(cr, M_PI / 2.0);
 627                 cairo_show_text(cr, buf);
 628                 cairo_rotate(cr, -M_PI / 2.0);
 629                 cairo_stroke(cr);
 630
 631                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 632                 cairo_move_to(cr, x, _analysis_height);
 633                 cairo_line_to(cr, x, 0.0);
 634                 cairo_stroke(cr);
 635         }
 636
 637         float y;
 638
 639         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 640         double dashes[] = { 3.0, 5.0 };
 641
 642         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 643                 snprintf(buf, 256, "+%0.0f", dB );
 644
 645                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 646                 //std::cerr << " y = " << y << std::endl;
 647                 y *= _analysis_height;
 648
 649                 if (dB != 0.0) {
 650                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 651                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 652                         cairo_show_text(cr, buf);
 653                         cairo_stroke(cr);
 654                 }
 655
 656                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 657                 cairo_move_to(cr, 0,     y);
 658                 cairo_line_to(cr, _analysis_width, y);
 659                 cairo_stroke(cr);
 660
 661                 if (dB == 0.0) {
 662                         cairo_set_dash(cr, dashes, 2, 0.0);
 663                 }
 664         }
 665
 666
 667
 668         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 669                 snprintf(buf, 256, "%0.0f", dB );
 670
 671                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 672                 y *= _analysis_height;
 673
 674                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 675                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 676                 cairo_show_text(cr, buf);
 677                 cairo_stroke(cr);
 678
 679                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 680                 cairo_move_to(cr, 0,     y);
 681                 cairo_line_to(cr, _analysis_width, y);
 682                 cairo_stroke(cr);
 683         }
 684
 685         cairo_set_dash(cr, 0, 0, 0.0);
 686
 687 }
 688
 689 inline float
 690 power_to_dB(float a)
 691 {
 692         return 10.0 * log10f(a);
 693 }
 694
 695 void
 696 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 697 {
 698         float x,y;
 699         int prevX = 0;
 700         float avgY = 0.0;
 701         int avgNum = 0;
 702
 703         // float width  = w->get_width();
 704         float height = w->get_height();
 705
 706         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 707         cairo_set_line_width (cr, 2.5);
 708
 709         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 710                 // x coordinate of bin i
 711                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 712                 x *= _analysis_width;
 713
 714                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 715
 716                 y = _analysis_height - _analysis_height*yCoeff;
 717
 718                 if ( i == 0 ) {
 719                         cairo_move_to(cr, x, y);
 720
 721                         avgY = 0;
 722                         avgNum = 0;
 723                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 724                         avgY = avgY/(float)avgNum;
 725                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 726                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 727                         cairo_line_to(cr, prevX, avgY);
 728                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 729
 730                         avgY = 0;
 731                         avgNum = 0;
 732
 733                 }
 734
 735                 prevX = rint(x);
 736                 avgY += y;
 737                 avgNum++;
 738         }
 739
 740         cairo_stroke(cr);
 741 }
 742
 743 void
 744 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 745 {
 746         float x,y;
 747
 748         int prevX = 0;
 749         float avgY = 0.0;
 750         int avgNum = 0;
 751
 752         // float width  = w->get_width();
 753         float height = w->get_height();
 754
 755         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 756         cairo_set_line_width (cr, 2.5);
 757
 758         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 759                 // x coordinate of bin i
 760                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 761                 x *= _analysis_width;
 762
 763                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 764                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 765                 float power = power_out - power_in;
 766
 767                 // for SaBer
 768                 /*
 769                 double p = 10.0 * log10( 1.0 + (double)_signal_output_fft->power_at_bin(i) - (double)
 770  - _signal_input_fft ->power_at_bin(i));
 771                 //p *= 1000000.0;
 772                 float power = (float)p;
 773
 774                 if ( (i % 1000) == 0) {
 775                         std::cerr << i << ": " << power << std::endl;
 776                 }
 777                 */
 778
 779                 if (ISINF(power)) {
 780                         if (power < 0) {
 781                                 power = _min_dB - 1.0;
 782                         } else {
 783                                 power = _max_dB - 1.0;
 784                         }
 785                 } else if (ISNAN(power)) {
 786                         power = _min_dB - 1.0;
 787                 }
 788
 789                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 790
 791                 y = _analysis_height - _analysis_height*yCoeff;
 792
 793                 if ( i == 0 ) {
 794                         cairo_move_to(cr, x, y);
 795
 796                         avgY = 0;
 797                         avgNum = 0;
 798                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 799                         avgY = avgY/(float)avgNum;
 800                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 801                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 802                         cairo_line_to(cr, prevX, avgY);
 803
 804                         avgY = 0;
 805                         avgNum = 0;
 806
 807                 }
 808
 809                 prevX = rint(x);
 810                 avgY += y;
 811                 avgNum++;
 812         }
 813
 814         cairo_stroke(cr);
 815
 816
 817 }