gtk2_ardour/plugin_eq_gui.cc

   1 /*
   2     Copyright (C) 2008 Paul Davis
   3     Author: Sampo Savolainen
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include <math.h>
  22 #include <iostream>
  23
  24 #ifdef COMPILER_MSVC
  25 #include <float.h>
  26 /* isinf() & isnan() are C99 standards, which older MSVC doesn't provide */
  27 #define ISINF(val) !((bool)_finite((double)val))
  28 #define ISNAN(val) (bool)_isnan((double)val)
  29 #else
  30 #define ISINF(val) std::isinf((val))
  31 #define ISNAN(val) std::isnan((val))
  32 #endif
  33
  34 #include <gtkmm/box.h>
  35 #include <gtkmm/button.h>
  36 #include <gtkmm/checkbutton.h>
  37
  38 #include "ardour/audio_buffer.h"
  39 #include "ardour/data_type.h"
  40 #include "ardour/chan_mapping.h"
  41 #include "ardour/plugin_insert.h"
  42 #include "ardour/session.h"
  43
  44 #include "plugin_eq_gui.h"
  45 #include "fft.h"
  46 #include "ardour_ui.h"
  47 #include "gui_thread.h"
  48
  49 #include "pbd/i18n.h"
  50
  51 using namespace ARDOUR;
  52
  53 PluginEqGui::PluginEqGui(boost::shared_ptr<ARDOUR::PluginInsert> pluginInsert)
  54         : _min_dB(-12.0)
  55         , _max_dB(+12.0)
  56         , _step_dB(3.0)
  57         , _buffer_size(0)
  58         , _signal_buffer_size(0)
  59         , _impulse_fft(0)
  60         , _signal_input_fft(0)
  61         , _signal_output_fft(0)
  62         , _plugin_insert(pluginInsert)
  63 {
  64         _signal_analysis_running = false;
  65         _samplerate = ARDOUR_UI::instance()->the_session()->frame_rate();
  66
  67         _log_coeff = (1.0 - 2.0 * (1000.0/(_samplerate/2.0))) / powf(1000.0/(_samplerate/2.0), 2.0);
  68         _log_max = log10f(1 + _log_coeff);
  69
  70         // Setup analysis drawing area
  71         _analysis_scale_surface = 0;
  72
  73         _analysis_area = new Gtk::DrawingArea();
  74         _analysis_width = 256.0;
  75         _analysis_height = 256.0;
  76         _analysis_area->set_size_request(_analysis_width, _analysis_height);
  77
  78         _analysis_area->signal_expose_event().connect( sigc::mem_fun (*this, &PluginEqGui::expose_analysis_area));
  79         _analysis_area->signal_size_allocate().connect( sigc::mem_fun (*this, &PluginEqGui::resize_analysis_area));
  80
  81         // dB selection
  82         dBScaleModel = Gtk::ListStore::create(dBColumns);
  83
  84         dBScaleCombo = new Gtk::ComboBox (dBScaleModel, false);
  85         dBScaleCombo->set_title (_("dB scale"));
  86
  87 #define ADD_DB_ROW(MIN,MAX,STEP,NAME) \
  88         { \
  89                 Gtk::TreeModel::Row row = *(dBScaleModel->append()); \
  90                 row[dBColumns.dBMin]  = (MIN); \
  91                 row[dBColumns.dBMax]  = (MAX); \
  92                 row[dBColumns.dBStep] = (STEP); \
  93                 row[dBColumns.name]   = NAME; \
  94         }
  95
  96         ADD_DB_ROW( -6,  +6, 1, "-6dB .. +6dB");
  97         ADD_DB_ROW(-12, +12, 3, "-12dB .. +12dB");
  98         ADD_DB_ROW(-24, +24, 5, "-24dB .. +24dB");
  99         ADD_DB_ROW(-36, +36, 6, "-36dB .. +36dB");
 100         ADD_DB_ROW(-64, +64,12, "-64dB .. +64dB");
 101
 102 #undef ADD_DB_ROW
 103
 104         dBScaleCombo -> pack_start(dBColumns.name);
 105         dBScaleCombo -> set_active(1);
 106
 107         dBScaleCombo -> signal_changed().connect( sigc::mem_fun(*this, &PluginEqGui::change_dB_scale) );
 108
 109         Gtk::Label *dBComboLabel = new Gtk::Label (_("dB scale"));
 110
 111         Gtk::HBox *dBSelectBin = new Gtk::HBox(false, 5);
 112         dBSelectBin->add( *manage(dBComboLabel));
 113         dBSelectBin->add( *manage(dBScaleCombo));
 114
 115         // Phase checkbutton
 116         _phase_button = new Gtk::CheckButton (_("Show phase"));
 117         _phase_button->set_active(true);
 118         _phase_button->signal_toggled().connect( sigc::mem_fun(*this, &PluginEqGui::redraw_scales));
 119
 120         // populate table
 121         attach( *manage(_analysis_area), 1, 3, 1, 2);
 122         attach( *manage(dBSelectBin),    1, 2, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 123         attach( *manage(_phase_button),  2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK);
 124 }
 125
 126 PluginEqGui::~PluginEqGui()
 127 {
 128         stop_listening ();
 129
 130         if (_analysis_scale_surface) {
 131                 cairo_surface_destroy (_analysis_scale_surface);
 132         }
 133
 134         delete _impulse_fft;
 135         _impulse_fft = 0;
 136         delete _signal_input_fft;
 137         _signal_input_fft = 0;
 138         delete _signal_output_fft;
 139         _signal_output_fft = 0;
 140
 141         // all gui objects are *manage'd by the inherited Table object
 142 }
 143
 144 void
 145 PluginEqGui::start_listening ()
 146 {
 147         if (!_plugin) {
 148                 _plugin = _plugin_insert->get_impulse_analysis_plugin();
 149         }
 150
 151         _plugin->activate();
 152         set_buffer_size(4096, 16384);
 153         // Connect the realtime signal collection callback
 154         _plugin_insert->AnalysisDataGathered.connect (analysis_connection, invalidator (*this), boost::bind (&PluginEqGui::signal_collect_callback, this, _1, _2), gui_context());
 155 }
 156
 157 void
 158 PluginEqGui::stop_listening ()
 159 {
 160         analysis_connection.disconnect ();
 161         _plugin->deactivate ();
 162 }
 163
 164 void
 165 PluginEqGui::on_hide()
 166 {
 167         stop_updating();
 168         Gtk::Table::on_hide();
 169 }
 170
 171 void
 172 PluginEqGui::stop_updating()
 173 {
 174         if (_update_connection.connected()) {
 175                 _update_connection.disconnect();
 176         }
 177 }
 178
 179 void
 180 PluginEqGui::start_updating()
 181 {
 182         if (!_update_connection.connected() && is_visible()) {
 183                 _update_connection = Glib::signal_timeout().connect( sigc::mem_fun(this, &PluginEqGui::timeout_callback), 250);
 184         }
 185 }
 186
 187 void
 188 PluginEqGui::on_show()
 189 {
 190         Gtk::Table::on_show();
 191
 192         start_updating();
 193
 194         Gtk::Widget *toplevel = get_toplevel();
 195         if (toplevel) {
 196                 if (!_window_unmap_connection.connected()) {
 197                         _window_unmap_connection = toplevel->signal_unmap().connect( sigc::mem_fun(this, &PluginEqGui::stop_updating));
 198                 }
 199
 200                 if (!_window_map_connection.connected()) {
 201                         _window_map_connection = toplevel->signal_map().connect( sigc::mem_fun(this, &PluginEqGui::start_updating));
 202                 }
 203         }
 204 }
 205
 206 void
 207 PluginEqGui::change_dB_scale()
 208 {
 209         Gtk::TreeModel::iterator iter = dBScaleCombo -> get_active();
 210
 211         Gtk::TreeModel::Row row;
 212
 213         if(iter && (row = *iter)) {
 214                 _min_dB = row[dBColumns.dBMin];
 215                 _max_dB = row[dBColumns.dBMax];
 216                 _step_dB = row[dBColumns.dBStep];
 217
 218
 219                 redraw_scales();
 220         }
 221 }
 222
 223 void
 224 PluginEqGui::redraw_scales()
 225 {
 226
 227         if (_analysis_scale_surface) {
 228                 cairo_surface_destroy (_analysis_scale_surface);
 229                 _analysis_scale_surface = 0;
 230         }
 231
 232         _analysis_area->queue_draw();
 233
 234         // TODO: Add graph legend!
 235 }
 236
 237 void
 238 PluginEqGui::set_buffer_size(uint32_t size, uint32_t signal_size)
 239 {
 240         if (_buffer_size == size && _signal_buffer_size == signal_size) {
 241                 return;
 242         }
 243
 244         GTKArdour::FFT *tmp1 = _impulse_fft;
 245         GTKArdour::FFT *tmp2 = _signal_input_fft;
 246         GTKArdour::FFT *tmp3 = _signal_output_fft;
 247
 248         try {
 249                 _impulse_fft       = new GTKArdour::FFT(size);
 250                 _signal_input_fft  = new GTKArdour::FFT(signal_size);
 251                 _signal_output_fft = new GTKArdour::FFT(signal_size);
 252         } catch( ... ) {
 253                 // Don't care about lost memory, we're screwed anyhow
 254                 _impulse_fft       = tmp1;
 255                 _signal_input_fft  = tmp2;
 256                 _signal_output_fft = tmp3;
 257                 throw;
 258         }
 259
 260         delete tmp1;
 261         delete tmp2;
 262         delete tmp3;
 263
 264         _buffer_size = size;
 265         _signal_buffer_size = signal_size;
 266
 267         // allocate separate in+out buffers, VST cannot process in-place
 268         ARDOUR::ChanCount acount (_plugin->get_info()->n_inputs + _plugin->get_info()->n_outputs);
 269         ARDOUR::ChanCount ccount = ARDOUR::ChanCount::max (_plugin->get_info()->n_inputs, _plugin->get_info()->n_outputs);
 270
 271         for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
 272                 _bufferset.ensure_buffers (*i, acount.get (*i), _buffer_size);
 273                 _collect_bufferset.ensure_buffers (*i, ccount.get (*i), _buffer_size);
 274         }
 275
 276         _bufferset.set_count (acount);
 277         _collect_bufferset.set_count (ccount);
 278 }
 279
 280 void
 281 PluginEqGui::resize_analysis_area (Gtk::Allocation& size)
 282 {
 283         _analysis_width  = (float)size.get_width();
 284         _analysis_height = (float)size.get_height();
 285
 286         if (_analysis_scale_surface) {
 287                 cairo_surface_destroy (_analysis_scale_surface);
 288                 _analysis_scale_surface = 0;
 289         }
 290 }
 291
 292 bool
 293 PluginEqGui::timeout_callback()
 294 {
 295         if (!_signal_analysis_running) {
 296                 _signal_analysis_running = true;
 297                 _plugin_insert -> collect_signal_for_analysis(_signal_buffer_size);
 298         }
 299         run_impulse_analysis();
 300
 301         return true;
 302 }
 303
 304 void
 305 PluginEqGui::signal_collect_callback(ARDOUR::BufferSet *in, ARDOUR::BufferSet *out)
 306 {
 307         ENSURE_GUI_THREAD (*this, &PluginEqGui::signal_collect_callback, in, out);
 308
 309         _signal_input_fft ->reset();
 310         _signal_output_fft->reset();
 311
 312         for (uint32_t i = 0; i < _plugin_insert->input_streams().n_audio(); ++i) {
 313                 _signal_input_fft ->analyze(in ->get_audio(i).data(), GTKArdour::FFT::HANN);
 314         }
 315
 316         for (uint32_t i = 0; i < _plugin_insert->output_streams().n_audio(); ++i) {
 317                 _signal_output_fft->analyze(out->get_audio(i).data(), GTKArdour::FFT::HANN);
 318         }
 319
 320         _signal_input_fft ->calculate();
 321         _signal_output_fft->calculate();
 322
 323         _signal_analysis_running = false;
 324
 325         // This signals calls expose_analysis_area()
 326         _analysis_area->queue_draw();
 327 }
 328
 329 void
 330 PluginEqGui::run_impulse_analysis()
 331 {
 332         /* Allocate some thread-local buffers so that Plugin::connect_and_run can use them */
 333         ARDOUR_UI::instance()->get_process_buffers ();
 334
 335         uint32_t inputs  = _plugin->get_info()->n_inputs.n_audio();
 336         uint32_t outputs = _plugin->get_info()->n_outputs.n_audio();
 337
 338         // Create the impulse, can't use silence() because consecutive calls won't work
 339         for (uint32_t i = 0; i < inputs; ++i) {
 340                 ARDOUR::AudioBuffer& buf = _bufferset.get_audio(i);
 341                 ARDOUR::Sample* d = buf.data();
 342                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 343                 *d = 1.0;
 344         }
 345
 346         ARDOUR::ChanMapping in_map(_plugin->get_info()->n_inputs);
 347         ARDOUR::ChanMapping out_map(_plugin->get_info()->n_outputs);
 348         // map output buffers after input buffers (no inplace for VST)
 349         out_map.offset_to (DataType::AUDIO, inputs);
 350
 351         _plugin->set_block_size (_buffer_size);
 352         _plugin->connect_and_run(_bufferset, 0, _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 353         framecnt_t f = _plugin->signal_latency ();
 354         // Adding user_latency() could be interesting
 355
 356         // Gather all output, taking latency into account.
 357         _impulse_fft->reset();
 358
 359         // Silence collect buffers to copy data to, can't use silence() because consecutive calls won't work
 360         for (uint32_t i = 0; i < outputs; ++i) {
 361                 ARDOUR::AudioBuffer &buf = _collect_bufferset.get_audio(i);
 362                 ARDOUR::Sample *d = buf.data();
 363                 memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 364         }
 365
 366         if (f == 0) {
 367                 //std::cerr << "0: no latency, copying full buffer, trivial.." << std::endl;
 368                 for (uint32_t i = 0; i < outputs; ++i) {
 369                         memcpy(_collect_bufferset.get_audio(i).data(),
 370                                _bufferset.get_audio(inputs + i).data(), _buffer_size * sizeof(float));
 371                 }
 372         } else {
 373                 //int C = 0;
 374                 //std::cerr << (++C) << ": latency is " << f << " frames, doing split processing.." << std::endl;
 375                 framecnt_t target_offset = 0;
 376                 framecnt_t frames_left = _buffer_size; // refaktoroi
 377                 do {
 378                         if (f >= _buffer_size) {
 379                                 //std::cerr << (++C) << ": f (=" << f << ") is larger than buffer_size, still trying to reach the actual output" << std::endl;
 380                                 // there is no data in this buffer regarding to the input!
 381                                 f -= _buffer_size;
 382                         } else {
 383                                 // this buffer contains either the first, last or a whole bu the output of the impulse
 384                                 // first part: offset is 0, so we copy to the start of _collect_bufferset
 385                                 //             we start at output offset "f"
 386                                 //             .. and copy "buffer size" - "f" - "offset" frames
 387
 388                                 framecnt_t length = _buffer_size - f - target_offset;
 389
 390                                 //std::cerr << (++C) << ": copying " << length << " frames to _collect_bufferset.get_audio(i)+" << target_offset << " from bufferset at offset " << f << std::endl;
 391                                 for (uint32_t i = 0; i < outputs; ++i) {
 392                                         memcpy(_collect_bufferset.get_audio(i).data(target_offset),
 393                                                         _bufferset.get_audio(inputs + i).data() + f,
 394                                                         length * sizeof(float));
 395                                 }
 396
 397                                 target_offset += length;
 398                                 frames_left   -= length;
 399                                 f = 0;
 400                         }
 401                         if (frames_left > 0) {
 402                                 // Silence the buffers
 403                                 for (uint32_t i = 0; i < inputs; ++i) {
 404                                         ARDOUR::AudioBuffer &buf = _bufferset.get_audio(i);
 405                                         ARDOUR::Sample *d = buf.data();
 406                                         memset(d, 0, sizeof(ARDOUR::Sample)*_buffer_size);
 407                                 }
 408
 409                                 _plugin->connect_and_run (_bufferset, target_offset, target_offset + _buffer_size, 1.0, in_map, out_map, _buffer_size, 0);
 410                         }
 411                 } while ( frames_left > 0);
 412
 413         }
 414
 415
 416         for (uint32_t i = 0; i < outputs; ++i) {
 417                 _impulse_fft->analyze(_collect_bufferset.get_audio(i).data());
 418         }
 419
 420         // normalize the output
 421         _impulse_fft->calculate();
 422
 423         // This signals calls expose_analysis_area()
 424         _analysis_area->queue_draw();
 425
 426         ARDOUR_UI::instance()->drop_process_buffers ();
 427 }
 428
 429 bool
 430 PluginEqGui::expose_analysis_area(GdkEventExpose *)
 431 {
 432         redraw_analysis_area();
 433         return true;
 434 }
 435
 436 void
 437 PluginEqGui::draw_analysis_scales(cairo_t *ref_cr)
 438 {
 439         // TODO: check whether we need rounding
 440         _analysis_scale_surface = cairo_surface_create_similar (cairo_get_target(ref_cr),
 441                         CAIRO_CONTENT_COLOR,
 442                         _analysis_width,
 443                         _analysis_height);
 444
 445         cairo_t *cr = cairo_create (_analysis_scale_surface);
 446
 447         cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
 448         cairo_rectangle(cr, 0.0, 0.0, _analysis_width, _analysis_height);
 449         cairo_fill(cr);
 450
 451
 452         draw_scales_power(_analysis_area, cr);
 453         if (_phase_button->get_active()) {
 454                 draw_scales_phase(_analysis_area, cr);
 455         }
 456
 457         cairo_destroy(cr);
 458 }
 459
 460 void
 461 PluginEqGui::redraw_analysis_area()
 462 {
 463         cairo_t *cr;
 464
 465         cr = gdk_cairo_create(GDK_DRAWABLE(_analysis_area->get_window()->gobj()));
 466
 467         if (_analysis_scale_surface == 0) {
 468                 draw_analysis_scales(cr);
 469         }
 470
 471         cairo_copy_page(cr);
 472
 473         cairo_set_source_surface(cr, _analysis_scale_surface, 0.0, 0.0);
 474         cairo_paint(cr);
 475
 476         if (_phase_button->get_active()) {
 477                 plot_impulse_phase(_analysis_area, cr);
 478         }
 479         plot_impulse_amplitude(_analysis_area, cr);
 480
 481         // TODO: make this optional
 482         plot_signal_amplitude_difference(_analysis_area, cr);
 483
 484         cairo_destroy(cr);
 485 }
 486
 487 #define PHASE_PROPORTION 0.5
 488
 489 void
 490 PluginEqGui::draw_scales_phase(Gtk::Widget */*w*/, cairo_t *cr)
 491 {
 492         float y;
 493         cairo_font_extents_t extents;
 494         cairo_font_extents(cr, &extents);
 495
 496         char buf[256];
 497         cairo_text_extents_t t_ext;
 498
 499         for (uint32_t i = 0; i < 3; i++) {
 500
 501                 y = _analysis_height/2.0 - (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 502
 503                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 504                 if (i == 0) {
 505                         snprintf(buf,256, "0\u00b0");
 506                 } else {
 507                         snprintf(buf,256, "%d\u00b0", (i * 45));
 508                 }
 509                 cairo_text_extents(cr, buf, &t_ext);
 510                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 511                 cairo_show_text(cr, buf);
 512
 513                 if (i == 0)
 514                         continue;
 515
 516
 517                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 518                 cairo_move_to(cr, 0.0,            y);
 519                 cairo_line_to(cr, _analysis_width, y);
 520
 521
 522                 y = _analysis_height/2.0 + (float)i*(_analysis_height/8.0)*PHASE_PROPORTION;
 523
 524                 // label
 525                 snprintf(buf,256, "-%d\u00b0", (i * 45));
 526                 cairo_set_source_rgb(cr, .8, .9, 0.2);
 527                 cairo_text_extents(cr, buf, &t_ext);
 528                 cairo_move_to(cr, _analysis_width - t_ext.width - t_ext.x_bearing - 2.0, y - extents.descent);
 529                 cairo_show_text(cr, buf);
 530
 531                 // line
 532                 cairo_set_source_rgba(cr, .8, .9, 0.2, 0.6/(float)i);
 533                 cairo_move_to(cr, 0.0,            y);
 534                 cairo_line_to(cr, _analysis_width, y);
 535
 536                 cairo_set_line_width (cr, 0.25 + 1.0/(float)(i+1));
 537                 cairo_stroke(cr);
 538         }
 539 }
 540
 541 void
 542 PluginEqGui::plot_impulse_phase(Gtk::Widget *w, cairo_t *cr)
 543 {
 544         float x,y;
 545
 546         int prevX = 0;
 547         float avgY = 0.0;
 548         int avgNum = 0;
 549
 550         // float width  = w->get_width();
 551         float height = w->get_height();
 552
 553         cairo_set_source_rgba(cr, 0.95, 0.3, 0.2, 1.0);
 554         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 555                 // x coordinate of bin i
 556                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 557                 x *= _analysis_width;
 558
 559                 y  = _analysis_height/2.0 - (_impulse_fft->phase_at_bin(i)/M_PI)*(_analysis_height/2.0)*PHASE_PROPORTION;
 560
 561                 if ( i == 0 ) {
 562                         cairo_move_to(cr, x, y);
 563
 564                         avgY = 0;
 565                         avgNum = 0;
 566                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 567                         avgY = avgY/(float)avgNum;
 568                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 569                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 570                         cairo_line_to(cr, prevX, avgY);
 571                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 572
 573                         avgY = 0;
 574                         avgNum = 0;
 575
 576                 }
 577
 578                 prevX = rint(x);
 579                 avgY += y;
 580                 avgNum++;
 581         }
 582
 583         cairo_set_line_width (cr, 2.0);
 584         cairo_stroke(cr);
 585 }
 586
 587 void
 588 PluginEqGui::draw_scales_power(Gtk::Widget */*w*/, cairo_t *cr)
 589 {
 590         if (_impulse_fft == 0) {
 591                 return;
 592         }
 593
 594         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 };
 595         float divisor = _samplerate / 2.0 / _impulse_fft->bins();
 596         float x;
 597
 598         cairo_set_line_width (cr, 1.5);
 599         cairo_set_font_size(cr, 9);
 600
 601         cairo_font_extents_t extents;
 602         cairo_font_extents(cr, &extents);
 603         // float fontXOffset = extents.descent + 1.0;
 604
 605         char buf[256];
 606
 607         for (uint32_t i = 0; scales[i] != -1.0; ++i) {
 608                 float bin = scales[i] / divisor;
 609
 610                 x  = log10f(1.0 + bin / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 611                 x *= _analysis_width;
 612
 613                 if (scales[i] < 1000.0) {
 614                         snprintf(buf, 256, "%0.0f", scales[i]);
 615                 } else {
 616                         snprintf(buf, 256, "%0.0fk", scales[i]/1000.0);
 617                 }
 618
 619                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 620
 621                 //cairo_move_to(cr, x + fontXOffset, 3.0);
 622                 cairo_move_to(cr, x - extents.height, 3.0);
 623
 624                 cairo_rotate(cr, M_PI / 2.0);
 625                 cairo_show_text(cr, buf);
 626                 cairo_rotate(cr, -M_PI / 2.0);
 627                 cairo_stroke(cr);
 628
 629                 cairo_set_source_rgb(cr, 0.3, 0.3, 0.3);
 630                 cairo_move_to(cr, x, _analysis_height);
 631                 cairo_line_to(cr, x, 0.0);
 632                 cairo_stroke(cr);
 633         }
 634
 635         float y;
 636
 637         //double dashes[] = { 1.0, 3.0, 4.5, 3.0 };
 638         double dashes[] = { 3.0, 5.0 };
 639
 640         for (float dB = 0.0; dB < _max_dB; dB += _step_dB ) {
 641                 snprintf(buf, 256, "+%0.0f", dB );
 642
 643                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 644                 //std::cerr << " y = " << y << std::endl;
 645                 y *= _analysis_height;
 646
 647                 if (dB != 0.0) {
 648                         cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 649                         cairo_move_to(cr, 1.0,     y + extents.height + 1.0);
 650                         cairo_show_text(cr, buf);
 651                         cairo_stroke(cr);
 652                 }
 653
 654                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 655                 cairo_move_to(cr, 0,     y);
 656                 cairo_line_to(cr, _analysis_width, y);
 657                 cairo_stroke(cr);
 658
 659                 if (dB == 0.0) {
 660                         cairo_set_dash(cr, dashes, 2, 0.0);
 661                 }
 662         }
 663
 664
 665
 666         for (float dB = - _step_dB; dB > _min_dB; dB -= _step_dB ) {
 667                 snprintf(buf, 256, "%0.0f", dB );
 668
 669                 y  = ( _max_dB - dB) / ( _max_dB - _min_dB );
 670                 y *= _analysis_height;
 671
 672                 cairo_set_source_rgb(cr, 0.4, 0.4, 0.4);
 673                 cairo_move_to(cr, 1.0,     y - extents.descent - 1.0);
 674                 cairo_show_text(cr, buf);
 675                 cairo_stroke(cr);
 676
 677                 cairo_set_source_rgb(cr, 0.2, 0.2, 0.2);
 678                 cairo_move_to(cr, 0,     y);
 679                 cairo_line_to(cr, _analysis_width, y);
 680                 cairo_stroke(cr);
 681         }
 682
 683         cairo_set_dash(cr, 0, 0, 0.0);
 684
 685 }
 686
 687 inline float
 688 power_to_dB(float a)
 689 {
 690         return 10.0 * log10f(a);
 691 }
 692
 693 void
 694 PluginEqGui::plot_impulse_amplitude(Gtk::Widget *w, cairo_t *cr)
 695 {
 696         float x,y;
 697         int prevX = 0;
 698         float avgY = 0.0;
 699         int avgNum = 0;
 700
 701         // float width  = w->get_width();
 702         float height = w->get_height();
 703
 704         cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
 705         cairo_set_line_width (cr, 2.5);
 706
 707         for (uint32_t i = 0; i < _impulse_fft->bins()-1; i++) {
 708                 // x coordinate of bin i
 709                 x  = log10f(1.0 + (float)i / (float)_impulse_fft->bins() * _log_coeff) / _log_max;
 710                 x *= _analysis_width;
 711
 712                 float yCoeff = ( power_to_dB(_impulse_fft->power_at_bin(i)) - _min_dB) / (_max_dB - _min_dB);
 713
 714                 y = _analysis_height - _analysis_height*yCoeff;
 715
 716                 if ( i == 0 ) {
 717                         cairo_move_to(cr, x, y);
 718
 719                         avgY = 0;
 720                         avgNum = 0;
 721                 } else if (rint(x) > prevX || i == _impulse_fft->bins()-1 ) {
 722                         avgY = avgY/(float)avgNum;
 723                         if (avgY > (height * 10.0) ) avgY = height * 10.0;
 724                         if (avgY < (-height * 10.0) ) avgY = -height * 10.0;
 725                         cairo_line_to(cr, prevX, avgY);
 726                         //cairo_line_to(cr, prevX, avgY/(float)avgNum);
 727
 728                         avgY = 0;
 729                         avgNum = 0;
 730
 731                 }
 732
 733                 prevX = rint(x);
 734                 avgY += y;
 735                 avgNum++;
 736         }
 737
 738         cairo_stroke(cr);
 739 }
 740
 741 void
 742 PluginEqGui::plot_signal_amplitude_difference(Gtk::Widget *w, cairo_t *cr)
 743 {
 744         float x,y;
 745
 746         int prevX = 0;
 747         float avgY = 0.0;
 748         int avgNum = 0;
 749
 750         // float width  = w->get_width();
 751         float height = w->get_height();
 752
 753         cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
 754         cairo_set_line_width (cr, 2.5);
 755
 756         for (uint32_t i = 0; i < _signal_input_fft->bins()-1; i++) {
 757                 // x coordinate of bin i
 758                 x  = log10f(1.0 + (float)i / (float)_signal_input_fft->bins() * _log_coeff) / _log_max;
 759                 x *= _analysis_width;
 760
 761                 float power_out = power_to_dB(_signal_output_fft->power_at_bin(i));
 762                 float power_in  = power_to_dB(_signal_input_fft ->power_at_bin(i));
 763                 float power = power_out - power_in;
 764
 765                 if (ISINF(power)) {
 766                         if (power < 0) {
 767                                 power = _min_dB - 1.0;
 768                         } else {
 769                                 power = _max_dB - 1.0;
 770                         }
 771                 } else if (ISNAN(power)) {
 772                         power = _min_dB - 1.0;
 773                 }
 774
 775                 float yCoeff = ( power - _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
 790                         avgY = 0;
 791                         avgNum = 0;
 792
 793                 }
 794
 795                 prevX = rint(x);
 796                 avgY += y;
 797                 avgNum++;
 798         }
 799
 800         cairo_stroke(cr);
 801 }