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