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 <algorithm>
  22 #include <math.h>
  23 #include <iomanip>
  24 #include <iostream>
  25 #include <sstream>
  26
  27 #ifdef COMPILER_MSVC
  28 #include <float.h>
  29 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
  30 #define ISINF(val) !((bool)_finite((double)val))
  31 #define ISNAN(val) (bool)_isnan((double)val)
  32 #else
  33 #define ISINF(val) std::isinf((val))
  34 #define ISNAN(val) std::isnan((val))
  35 #endif
  36
  37 #include <gtkmm/box.h>
  38 #include <gtkmm/button.h>
  39 #include <gtkmm/checkbutton.h>
  40
  41 #include "ardour/audio_buffer.h"
  42 #include "ardour/data_type.h"
  43 #include "ardour/chan_mapping.h"
  44 #include "ardour/plugin_insert.h"
  45 #include "ardour/session.h"
  46
  47 #include "plugin_eq_gui.h"
  48 #include "fft.h"
  49 #include "ardour_ui.h"
  50 #include "gui_thread.h"
  51
  52 #include "pbd/i18n.h"
  53
  54 using namespace ARDOUR;
  55
  56 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  57         : _min_dB(-12.0)
  58         , _max_dB(+12.0)
  59         , _step_dB(3.0)
  60         , _buffer_size(0)
  61         , _signal_buffer_size(0)
  62         , _impulse_fft(0)
  63         , _signal_input_fft(0)
  64         , _signal_output_fft(0)
  65         , _plugin_insert(pluginInsert)
  66         , _pointer_in_area_xpos(-1)
  67 {
  68         _signal_analysis_running = false;
  69         _samplerate = ARDOUR_UI::instance()->the_session()->sample_rate();
  70
  71         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  72         _log_max = log10f(1 + _log_coeff);
  73
  74         // Setup analysis drawing area
  75         _analysis_scale_surface = 0;
  76
  77         _analysis_area = new Gtk::DrawingArea();
  78         _analysis_width = 256.0;
  79         _analysis_height = 256.0;
  80         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  81
  82         _analysis_area->add_events(Gdk::POINTER_MOTION_MASK | Gdk::LEAVE_NOTIFY_MASK | Gdk::BUTTON_PRESS_MASK);
  83
  84         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  85         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  86         _analysis_area->signal_motion_notify_event().connect( sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseover));
  87         _analysis_area->signal_leave_notify_event().connect( sigc::mem_fun (*this, &PluginEqGui::analysis_area_mouseexit));
  88
  89         // dB selection
  90         dBScaleModel = Gtk::ListStore::create(dBColumns);
  91
  92         dBScaleCombo = new Gtk::ComboBox (dBScaleModel, false);
  93         dBScaleCombo->set_title (_("dB scale"));
  94
  95 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  96         { \
  97                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  98                 row[dBColumns.dBMin]  = (MIN); \
  99                 row[dBColumns.dBMax]  = (MAX); \
 100                 row[dBColumns.dBStep] = (STEP); \
 101                 row[dBColumns.name]   = NAME; \
 102         }
 103
 104         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
 105         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
 106         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
 107         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
 108         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
 109
 110 #undef ADD_DB_ROW
 111
 112         dBScaleCombo -> pack_start(dBColumns.name);
 113         dBScaleCombo -> set_active(1);
 114
 115         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
 116
 117         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 118
 119         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 120         dBSelectBin->add( *manage(dBComboLabel));
 121         dBSelectBin->add( *manage(dBScaleCombo));
 122
 123         // Phase checkbutton
 124         _signal_button = new Gtk::CheckButton (_("Plot live signal"));
 125         _signal_button->set_active(true);
 126
 127         // Phase checkbutton
 128         _phase_button = new Gtk::CheckButton (_("Show phase"));
 129         _phase_button->set_active(true);
 130         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 131
 132         // Freq/dB info for mouse over
 133         _pointer_info = new Gtk::Label ("", 1, 0.5);
 134         _pointer_info->set_size_request(_analysis_width / 4, -1);
 135         _pointer_info->set_name("PluginAnalysisInfoLabel");
 136
 137         // populate table
 138         attach (*manage(_analysis_area), 0, 4, 0, 1);
 139         attach (*manage(dBSelectBin),    0, 1, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
 140         attach (*manage(_signal_button), 1, 2, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
 141         attach (*manage(_phase_button),  2, 3, 1, 2, Gtk::SHRINK, Gtk::SHRINK);
 142         attach (*manage(_pointer_info),  3, 4, 1, 2, Gtk::FILL,   Gtk::SHRINK);
 143 }
 144
 145 PluginEqGui::~PluginEqGui()
 146 {
 147         stop_listening ();
 148
 149         if (_analysis_scale_surface) {
 150                 cairo_surface_destroy (_analysis_scale_surface);
 151         }
 152
 153         delete _impulse_fft;
 154         _impulse_fft = 0;
 155         delete _signal_input_fft;
 156         _signal_input_fft = 0;
 157         delete _signal_output_fft;
 158         _signal_output_fft = 0;
 159
 160         // all gui objects are *manage'd by the inherited Table object
 161 }
 162
 163 static inline float
 164 power_to_dB(float a)
 165 {
 166         return 10.0 * log10f(a);
 167 }
 168
 169 void
 170 PluginEqGui::start_listening ()
 171 {
 172         if (!_plugin) {
 173                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 174         }
 175
 176         _plugin->activate();
 177         set_buffer_size(4096, 16384);
 178         _plugin->set_block_size (_buffer_size);
 179         // Connect the realtime signal collection callback
 180         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 181 }
 182
 183 void
 184 PluginEqGui::stop_listening ()
 185 {
 186         analysis_connection.disconnect ();
 187         _plugin->deactivate ();
 188 }
 189
 190 void
 191 PluginEqGui::on_hide()
 192 {
 193         stop_updating();
 194         Gtk::Table::on_hide();
 195 }
 196
 197 void
 198 PluginEqGui::stop_updating()
 199 {
 200         if (_update_connection.connected()) {
 201                 _update_connection.disconnect();
 202         }
 203 }
 204
 205 void
 206 PluginEqGui::start_updating()
 207 {
 208         if (!_update_connection.connected() && is_visible()) {
 209                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 210         }
 211 }
 212
 213 void
 214 PluginEqGui::on_show()
 215 {
 216         Gtk::Table::on_show();
 217
 218         start_updating();
 219
 220         Gtk::Widget *toplevel = get_toplevel();
 221         if (toplevel) {
 222                 if (!_window_unmap_connection.connected()) {
 223                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 224                 }
 225
 226                 if (!_window_map_connection.connected()) {
 227                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 228                 }
 229         }
 230 }
 231
 232 void
 233 PluginEqGui::change_dB_scale()
 234 {
 235         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 236
 237         Gtk::TreeModel::Row row;
 238
 239         if(iter && (row = *iter)) {
 240                 _min_dB = row[dBColumns.dBMin];
 241                 _max_dB = row[dBColumns.dBMax];
 242                 _step_dB = row[dBColumns.dBStep];
 243
 244
 245                 redraw_scales();
 246         }
 247 }
 248
 249 void
 250 PluginEqGui::redraw_scales()
 251 {
 252
 253         if (_analysis_scale_surface) {
 254                 cairo_surface_destroy (_analysis_scale_surface);
 255                 _analysis_scale_surface = 0;
 256         }
 257
 258         _analysis_area->queue_draw();
 259
 260         // TODO: Add graph legend!
 261 }
 262
 263 void
 264 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 265 {
 266         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 267                 return;
 268         }
 269
 270         GTKArdour::FFT *tmp1 = _impulse_fft;
 271         GTKArdour::FFT *tmp2 = _signal_input_fft;
 272         GTKArdour::FFT *tmp3 = _signal_output_fft;
 273
 274         try {
 275                 _impulse_fft       = new GTKArdour::FFT(size);
 276                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 277                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 278         } catch( ... ) {
 279                 // Don't care about lost memory, we're screwed anyhow
 280                 _impulse_fft       = tmp1;
 281                 _signal_input_fft  = tmp2;
 282                 _signal_output_fft = tmp3;
 283                 throw;
 284         }
 285
 286         delete tmp1;
 287         delete tmp2;
 288         delete tmp3;
 289
 290         _buffer_size = size;
 291         _signal_buffer_size = signal_size;
 292
 293         // allocate separate in+out buffers, VST cannot process in-place
 294         ARDOUR::ChanCount acount (_plugin->get_info()->n_inputs + _plugin->get_info()->n_outputs);
 295         ARDOUR::ChanCount ccount = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 296
 297         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 298                 _bufferset.ensure_buffers (*i, acount.get (*i), _buffer_size);
 299                 _collect_bufferset.ensure_buffers (*i, ccount.get (*i), _buffer_size);
 300         }
 301
 302         _bufferset.set_count (acount);
 303         _collect_bufferset.set_count (ccount);
 304 }
 305
 306 void
 307 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 308 {
 309         _analysis_width  = (float)size.get_width();
 310         _analysis_height = (float)size.get_height();
 311
 312         if (_analysis_scale_surface) {
 313                 cairo_surface_destroy (_analysis_scale_surface);
 314                 _analysis_scale_surface = 0;
 315         }
 316
 317         _pointer_info->set_size_request(_analysis_width / 4, -1);
 318 }
 319
 320 bool
 321 PluginEqGui::timeout_callback()
 322 {
 323         if (!_signal_analysis_running) {
 324                 _signal_analysis_running = true;
 325                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 326         }
 327         run_impulse_analysis();
 328
 329         return true;
 330 }
 331
 332 void
 333 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 334 {
 335         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out);
 336
 337         _signal_input_fft ->reset();
 338         _signal_output_fft->reset();
 339
 340         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 341                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 342         }
 343
 344         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 345                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 346         }
 347
 348         _signal_input_fft ->calculate();
 349         _signal_output_fft->calculate();
 350
 351         _signal_analysis_running = false;
 352
 353         // This signals calls expose_analysis_area()
 354         _analysis_area->queue_draw();
 355 }
 356
 357 void
 358 PluginEqGui::run_impulse_analysis()
 359 {
 360         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 361         ARDOUR_UI::instance()->get_process_buffers ();
 362
 363         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 364         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 365
 366         // Create the impulse, can't use silence() because consecutive calls won't work
 367         for (uint32_t i = 0; i < inputs; ++i) {
 368                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 369                 ARDOUR::Sample* d = buf.data();
 370                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 371                 *d = 1.0;
 372         }
 373
 374         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 375         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 376         // map output buffers after input buffers (no inplace for VST)
 377         out_map.offset_to (DataType::AUDIO, inputs);
 378
 379         _plugin->connect_and_run(_bufferset, 0, _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 380         samplecnt_t f = _plugin->signal_latency ();
 381         // Adding user_latency() could be interesting
 382
 383         // Gather all output, taking latency into account.
 384         _impulse_fft->reset();
 385
 386         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 387         for (uint32_t i = 0; i < outputs; ++i) {
 388                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 389                 ARDOUR::Sample *d = buf.data();
 390                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 391         }
 392
 393         if (f == 0) {
 394                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 395                 for (uint32_t i = 0; i < outputs; ++i) {
 396                         memcpy(_collect_bufferset.get_audio(i).data(),
 397                                _bufferset.get_audio(inputs + i).data(), _buffer_size * sizeof(float));
 398                 }
 399         } else {
 400                 //int C = 0;
 401                 //std::cerr << (++C) << ": latency is " << f << " samples, doing split processing.." << std::endl;
 402                 samplecnt_t target_offset = 0;
 403                 samplecnt_t samples_left = _buffer_size; // refaktoroi
 404                 do {
 405                         if (f >= _buffer_size) {
 406                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 407                                 // there is no data in this buffer regarding to the input!
 408                                 f -= _buffer_size;
 409                         } else {
 410                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 411                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 412                                 //             we start at output offset "f"
 413                                 //             .. and copy "buffer size" - "f" - "offset" samples
 414
 415                                 samplecnt_t length = _buffer_size - f - target_offset;
 416
 417                                 //std::cerr << (++C) << ": copying " << length << " samples to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 418                                 for (uint32_t i = 0; i < outputs; ++i) {
 419                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 420                                                         _bufferset.get_audio(inputs + i).data() + f,
 421                                                         length * sizeof(float));
 422                                 }
 423
 424                                 target_offset += length;
 425                                 samples_left   -= length;
 426                                 f = 0;
 427                         }
 428                         if (samples_left > 0) {
 429                                 // Silence the buffers
 430                                 for (uint32_t i = 0; i < inputs; ++i) {
 431                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 432                                         ARDOUR::Sample *d = buf.data();
 433                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 434                                 }
 435
 436                                 _plugin->connect_and_run (_bufferset, target_offset, target_offset + _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 437                         }
 438                 } while ( samples_left > 0);
 439
 440         }
 441
 442
 443         for (uint32_t i = 0; i < outputs; ++i) {
 444                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 445         }
 446
 447         // normalize the output
 448         _impulse_fft->calculate();
 449
 450         // This signals calls expose_analysis_area()
 451         _analysis_area->queue_draw();
 452
 453         ARDOUR_UI::instance()->drop_process_buffers ();
 454 }
 455
 456 void
 457 PluginEqGui::update_pointer_info(float x)
 458 {
 459         /* find the bin corresponding to x (see plot_impulse_amplitude) */
 460         int i = roundf ((powf (10, _log_max * x / _analysis_width) - 1.0) * _impulse_fft->bins() / _log_coeff);
 461         float dB = power_to_dB (_impulse_fft->power_at_bin (i));
 462         /* calc freq corresponding to bin */
 463         const int freq = std::max (1, (int) roundf((float)i / (float)_impulse_fft->bins() * _samplerate / 2.f));
 464
 465         _pointer_in_area_freq = round (_analysis_width * log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max);
 466
 467         std::stringstream ss;
 468         ss << std::fixed;
 469         if (freq >= 10000) {
 470                 ss <<  std::setprecision (1) << freq / 1000.0 << "kHz";
 471         } else if (freq >= 1000) {
 472                 ss <<  std::setprecision (2) << freq / 1000.0 << "kHz";
 473         } else {
 474                 ss <<  std::setprecision (0) << freq << "Hz";
 475         }
 476         ss << " " << std::setw(6) << std::setprecision (1) << std::showpos << dB;
 477         ss << std::setw(0) << "dB";
 478
 479         if (_phase_button->get_active()) {
 480                 float phase = 180. * _impulse_fft->phase_at_bin (i) / M_PI;
 481                 ss << " " << std::setw(6) << std::setprecision (1) << std::showpos << phase;
 482                 ss << std::setw(0) << "\u00B0";
 483         }
 484         _pointer_info->set_text(ss.str());
 485 }
 486
 487 bool
 488 PluginEqGui::analysis_area_mouseover(GdkEventMotion *event)
 489 {
 490         update_pointer_info(event->x);
 491         _pointer_in_area_xpos = event->x;
 492         _analysis_area->queue_draw();
 493         return true;
 494 }
 495
 496 bool
 497 PluginEqGui::analysis_area_mouseexit(GdkEventCrossing *)
 498 {
 499         _pointer_info->set_text("");
 500         _pointer_in_area_xpos = -1;
 501         _analysis_area->queue_draw();
 502         return true;
 503 }
 504
 505 bool
 506 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 507 {
 508         redraw_analysis_area();
 509         return true;
 510 }
 511
 512 void
 513 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 514 {
 515         // TODO: check whether we need rounding
 516         _analysis_scale_surface = cairo_surface_create_similar (cairo_get_target(ref_cr),
 517                         CAIRO_CONTENT_COLOR,
 518                         _analysis_width,
 519                         _analysis_height);
 520
 521         cairo_t *cr = cairo_create (_analysis_scale_surface);
 522
 523         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 524         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 525         cairo_fill(cr);
 526
 527
 528         draw_scales_power(_analysis_area, cr);
 529         if (_phase_button->get_active()) {
 530                 draw_scales_phase(_analysis_area, cr);
 531         }
 532
 533         cairo_destroy(cr);
 534 }
 535
 536 void
 537 PluginEqGui::redraw_analysis_area()
 538 {
 539         cairo_t *cr;
 540
 541         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 542
 543         if (_analysis_scale_surface == 0) {
 544                 draw_analysis_scales(cr);
 545         }
 546
 547         cairo_copy_page(cr);
 548
 549         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 550         cairo_paint(cr);
 551
 552         cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
 553
 554         if (_phase_button->get_active()) {
 555                 plot_impulse_phase(_analysis_area, cr);
 556         }
 557
 558         plot_impulse_amplitude(_analysis_area, cr);
 559
 560         if (_pointer_in_area_xpos >= 0) {
 561                 update_pointer_info (_pointer_in_area_xpos);
 562         }
 563
 564         if (_signal_button->get_active()) {
 565                 plot_signal_amplitude_difference(_analysis_area, cr);
 566         }
 567
 568         if (_pointer_in_area_xpos >= 0 && _pointer_in_area_freq > 0) {
 569                 const double dashed[] = {0.0, 2.0};
 570                 cairo_set_dash (cr, dashed, 2, 0);
 571                 cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
 572                 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
 573                 cairo_set_line_width (cr, 1.0);
 574                 cairo_move_to (cr, _pointer_in_area_freq - .5, -.5);
 575                 cairo_line_to (cr, _pointer_in_area_freq - .5, _analysis_height - .5);
 576                 cairo_stroke(cr);
 577         }
 578
 579         cairo_destroy(cr);
 580 }
 581
 582 #define PHASE_PROPORTION 0.5
 583
 584 void
 585 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 586 {
 587         float y;
 588         cairo_font_extents_t extents;
 589         cairo_font_extents(cr, &extents);
 590
 591         char buf[256];
 592         cairo_text_extents_t t_ext;
 593
 594         for (uint32_t i = 0; i < 3; i++) {
 595
 596                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 597
 598                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 599                 if (i == 0) {
 600                         snprintf(buf,256, "0\u00b0");
 601                 } else {
 602                         snprintf(buf,256, "%d\u00b0", (i * 45));
 603                 }
 604                 cairo_text_extents(cr, buf, &t_ext);
 605                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 606                 cairo_show_text(cr, buf);
 607
 608                 if (i == 0)
 609                         continue;
 610
 611
 612                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 613                 cairo_move_to(cr, 0.0,            y);
 614                 cairo_line_to(cr, _analysis_width, y);
 615
 616
 617                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 618
 619                 // label
 620                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 621                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 622                 cairo_text_extents(cr, buf, &t_ext);
 623                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 624                 cairo_show_text(cr, buf);
 625
 626                 // line
 627                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 628                 cairo_move_to(cr, 0.0,            y);
 629                 cairo_line_to(cr, _analysis_width, y);
 630
 631                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 632                 cairo_stroke(cr);
 633         }
 634 }
 635
 636 void
 637 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 638 {
 639         float x,y;
 640
 641         int prevX = 0;
 642         float avgY = 0.0;
 643         int avgNum = 0;
 644
 645         // float width  = w->get_width();
 646         float height = w->get_height();
 647
 648         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 649         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 650                 // x coordinate of bin i
 651                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 652                 x *= _analysis_width;
 653
 654                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 655
 656                 if ( i == 0 ) {
 657                         cairo_move_to(cr, x, y);
 658
 659                         avgY = 0;
 660                         avgNum = 0;
 661                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 662                         avgY = avgY/(float)avgNum;
 663                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 664                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 665                         cairo_line_to(cr, prevX, avgY);
 666                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 667
 668                         avgY = 0;
 669                         avgNum = 0;
 670
 671                 }
 672
 673                 prevX = rint(x);
 674                 avgY += y;
 675                 avgNum++;
 676         }
 677
 678         cairo_set_line_width (cr, 2.0);
 679         cairo_stroke(cr);
 680 }
 681
 682 void
 683 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 684 {
 685         if (_impulse_fft == 0) {
 686                 return;
 687         }
 688
 689         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 };
 690         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 691         float x;
 692
 693         cairo_set_line_width (cr, 1.5);
 694         cairo_set_font_size(cr, 9);
 695
 696         cairo_font_extents_t extents;
 697         cairo_font_extents(cr, &extents);
 698         // float fontXOffset = extents.descent + 1.0;
 699
 700         char buf[256];
 701
 702         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 703                 float bin = scales[i] / divisor;
 704
 705                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 706                 x *= _analysis_width;
 707
 708                 if (scales[i] < 1000.0) {
 709                         snprintf(buf, 256, "%0.0f", scales[i]);
 710                 } else {
 711                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 712                 }
 713
 714                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 715
 716                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 717                 cairo_move_to(cr, x - extents.height, 3.0);
 718
 719                 cairo_rotate(cr, M_PI / 2.0);
 720                 cairo_show_text(cr, buf);
 721                 cairo_rotate(cr, -M_PI / 2.0);
 722                 cairo_stroke(cr);
 723
 724                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 725                 cairo_move_to(cr, x, _analysis_height);
 726                 cairo_line_to(cr, x, 0.0);
 727                 cairo_stroke(cr);
 728         }
 729
 730         float y;
 731
 732         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 733         double dashes[] = { 3.0, 5.0 };
 734
 735         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 736                 snprintf(buf, 256, "+%0.0f", dB );
 737
 738                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 739                 //std::cerr << " y = " << y << std::endl;
 740                 y *= _analysis_height;
 741
 742                 if (dB != 0.0) {
 743                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 744                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 745                         cairo_show_text(cr, buf);
 746                         cairo_stroke(cr);
 747                 }
 748
 749                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 750                 cairo_move_to(cr, 0,     y);
 751                 cairo_line_to(cr, _analysis_width, y);
 752                 cairo_stroke(cr);
 753
 754                 if (dB == 0.0) {
 755                         cairo_set_dash(cr, dashes, 2, 0.0);
 756                 }
 757         }
 758
 759
 760
 761         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 762                 snprintf(buf, 256, "%0.0f", dB );
 763
 764                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 765                 y *= _analysis_height;
 766
 767                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 768                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 769                 cairo_show_text(cr, buf);
 770                 cairo_stroke(cr);
 771
 772                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 773                 cairo_move_to(cr, 0,     y);
 774                 cairo_line_to(cr, _analysis_width, y);
 775                 cairo_stroke(cr);
 776         }
 777
 778         cairo_set_dash(cr, 0, 0, 0.0);
 779
 780 }
 781
 782 void
 783 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 784 {
 785         float x,y;
 786         int prevX = 0;
 787         float avgY = 0.0;
 788         int avgNum = 0;
 789
 790         // float width  = w->get_width();
 791         float height = w->get_height();
 792
 793         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 794         cairo_set_line_width (cr, 2.5);
 795
 796         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 797                 // x coordinate of bin i
 798                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 799                 x *= _analysis_width;
 800
 801                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 802
 803                 y = _analysis_height - _analysis_height*yCoeff;
 804
 805                 if ( i == 0 ) {
 806                         cairo_move_to(cr, x, y);
 807
 808                         avgY = 0;
 809                         avgNum = 0;
 810                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 811                         avgY = avgY/(float)avgNum;
 812                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 813                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 814                         cairo_line_to(cr, prevX, avgY);
 815                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 816
 817                         avgY = 0;
 818                         avgNum = 0;
 819
 820                 }
 821
 822                 prevX = rint(x);
 823                 avgY += y;
 824                 avgNum++;
 825         }
 826
 827         cairo_stroke(cr);
 828 }
 829
 830 void
 831 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 832 {
 833         float x,y;
 834
 835         int prevX = 0;
 836         float avgY = 0.0;
 837         int avgNum = 0;
 838
 839         // float width  = w->get_width();
 840         float height = w->get_height();
 841
 842         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 843         cairo_set_line_width (cr, 1.5);
 844
 845         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 846                 // x coordinate of bin i
 847                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 848                 x *= _analysis_width;
 849
 850                 float power_out = _signal_output_fft->power_at_bin (i) + 1e-30;
 851                 float power_in  = _signal_input_fft ->power_at_bin (i) + 1e-30;
 852                 float power = power_to_dB (power_out / power_in);
 853
 854                 assert (!ISINF(power));
 855                 assert (!ISNAN(power));
 856
 857                 float yCoeff = ( power - _min_dB) / (_max_dB - _min_dB);
 858
 859                 y = _analysis_height - _analysis_height*yCoeff;
 860
 861                 if ( i == 0 ) {
 862                         cairo_move_to(cr, x, y);
 863
 864                         avgY = 0;
 865                         avgNum = 0;
 866                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 867                         avgY = avgY/(float)avgNum;
 868                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 869                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 870                         cairo_line_to(cr, prevX, avgY);
 871
 872                         avgY = 0;
 873                         avgNum = 0;
 874
 875                 }
 876
 877                 prevX = rint(x);
 878                 avgY += y;
 879                 avgNum++;
 880         }
 881
 882         cairo_stroke(cr);
 883 }