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