pv/views/trace/analogsignal.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <limits>
  26 #include <vector>
  27
  28 #include <QApplication>
  29 #include <QCheckBox>
  30 #include <QComboBox>
  31 #include <QDebug>
  32 #include <QFormLayout>
  33 #include <QGridLayout>
  34 #include <QLabel>
  35 #include <QString>
  36
  37 #include "analogsignal.hpp"
  38 #include "logicsignal.hpp"
  39 #include "view.hpp"
  40
  41 #include "pv/data/analog.hpp"
  42 #include "pv/data/analogsegment.hpp"
  43 #include "pv/data/logic.hpp"
  44 #include "pv/data/logicsegment.hpp"
  45 #include "pv/data/signalbase.hpp"
  46 #include "pv/globalsettings.hpp"
  47
  48 #include <libsigrokcxx/libsigrokcxx.hpp>
  49
  50 using std::bind;
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 using std::max;
  55 using std::make_pair;
  56 using std::min;
  57 using std::numeric_limits;
  58 using std::out_of_range;
  59 using std::pair;
  60 using std::placeholders::_1;
  61 using std::shared_ptr;
  62 using std::vector;
  63
  64 using pv::data::SignalBase;
  65
  66 namespace pv {
  67 namespace views {
  68 namespace trace {
  69
  70 const QColor AnalogSignal::SignalColours[4] = {
  71         QColor(0xC4, 0xA0, 0x00),       // Yellow
  72         QColor(0x87, 0x20, 0x7A),       // Magenta
  73         QColor(0x20, 0x4A, 0x87),       // Blue
  74         QColor(0x4E, 0x9A, 0x06)        // Green
  75 };
  76
  77 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  78 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  79 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  80
  81 const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77);
  82 const QColor AnalogSignal::SamplingPointColourLo = QColor(200, 0, 0, 80 * 256 / 100);
  83 const QColor AnalogSignal::SamplingPointColourNe = QColor(0,   0, 0, 80 * 256 / 100);
  84 const QColor AnalogSignal::SamplingPointColourHi = QColor(0, 200, 0, 80 * 256 / 100);
  85
  86 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  87 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  88 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  89 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  90
  91 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  92 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  93
  94 const int AnalogSignal::MaximumVDivs = 10;
  95 const int AnalogSignal::MinScaleIndex = -6;
  96 const int AnalogSignal::MaxScaleIndex = 7;
  97
  98 const int AnalogSignal::InfoTextMarginRight = 20;
  99 const int AnalogSignal::InfoTextMarginBottom = 5;
 100
 101 AnalogSignal::AnalogSignal(
 102         pv::Session &session,
 103         shared_ptr<data::SignalBase> base) :
 104         Signal(session, base),
 105         scale_index_(4), // 20 per div
 106         scale_index_drag_offset_(0),
 107         pos_vdivs_(1),
 108         neg_vdivs_(1),
 109         resolution_(0),
 110         display_type_(DisplayBoth),
 111         autoranging_(true)
 112 {
 113         axis_pen_ = AxisPen;
 114
 115         pv::data::Analog* analog_data =
 116                 dynamic_cast<pv::data::Analog*>(data().get());
 117
 118         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 119                 this, SLOT(on_min_max_changed(float, float)));
 120
 121         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ConversionThresholdDispMode,
 122                 bind(&AnalogSignal::on_settingViewConversionThresholdDispMode_changed, this, _1));
 123
 124         GlobalSettings gs;
 125         conversion_threshold_disp_mode_ =
 126                 gs.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 127
 128         div_height_ = gs.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 129
 130         base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]);
 131         update_scale();
 132 }
 133
 134 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
 135 {
 136         return base_->analog_data();
 137 }
 138
 139 void AnalogSignal::save_settings(QSettings &settings) const
 140 {
 141         settings.setValue("pos_vdivs", pos_vdivs_);
 142         settings.setValue("neg_vdivs", neg_vdivs_);
 143         settings.setValue("scale_index", scale_index_);
 144         settings.setValue("display_type", display_type_);
 145         settings.setValue("autoranging", autoranging_);
 146         settings.setValue("div_height", div_height_);
 147 }
 148
 149 void AnalogSignal::restore_settings(QSettings &settings)
 150 {
 151         if (settings.contains("pos_vdivs"))
 152                 pos_vdivs_ = settings.value("pos_vdivs").toInt();
 153
 154         if (settings.contains("neg_vdivs"))
 155                 neg_vdivs_ = settings.value("neg_vdivs").toInt();
 156
 157         if (settings.contains("scale_index")) {
 158                 scale_index_ = settings.value("scale_index").toInt();
 159                 update_scale();
 160         }
 161
 162         if (settings.contains("display_type"))
 163                 display_type_ = (DisplayType)(settings.value("display_type").toInt());
 164
 165         if (settings.contains("autoranging"))
 166                 autoranging_ = settings.value("autoranging").toBool();
 167
 168         if (settings.contains("div_height")) {
 169                 const int old_height = div_height_;
 170                 div_height_ = settings.value("div_height").toInt();
 171
 172                 if ((div_height_ != old_height) && owner_) {
 173                         // Call order is important, otherwise the lazy event handler won't work
 174                         owner_->extents_changed(false, true);
 175                         owner_->row_item_appearance_changed(false, true);
 176                 }
 177         }
 178 }
 179
 180 pair<int, int> AnalogSignal::v_extents() const
 181 {
 182         const int ph = pos_vdivs_ * div_height_;
 183         const int nh = neg_vdivs_ * div_height_;
 184         return make_pair(-ph, nh);
 185 }
 186
 187 int AnalogSignal::scale_handle_offset() const
 188 {
 189         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 190
 191         return ((scale_index_drag_offset_ - scale_index_) * h / 4) - h / 2;
 192 }
 193
 194 void AnalogSignal::scale_handle_dragged(int offset)
 195 {
 196         const int h = (pos_vdivs_ + neg_vdivs_) * div_height_;
 197
 198         scale_index_ = scale_index_drag_offset_ - (offset + h / 2) / (h / 4);
 199
 200         update_scale();
 201 }
 202
 203 void AnalogSignal::scale_handle_drag_release()
 204 {
 205         scale_index_drag_offset_ = scale_index_;
 206         update_scale();
 207 }
 208
 209 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 210 {
 211         if (!base_->enabled())
 212                 return;
 213
 214         bool paint_thr_bg =
 215                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 216
 217         const vector<double> thresholds = base_->get_conversion_thresholds();
 218
 219         // Only display thresholds if we have some and we show analog samples
 220         if ((thresholds.size() > 0) && paint_thr_bg &&
 221                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 222
 223                 const int visual_y = get_visual_y();
 224                 const pair<int, int> extents = v_extents();
 225                 const int top = visual_y + extents.first;
 226                 const int btm = visual_y + extents.second;
 227
 228                 // Draw high/neutral/low areas
 229                 if (thresholds.size() == 2) {
 230                         int thr_lo = visual_y - thresholds[0] * scale_;
 231                         int thr_hi = visual_y - thresholds[1] * scale_;
 232                         thr_lo = min(max(thr_lo, top), btm);
 233                         thr_hi = min(max(thr_hi, top), btm);
 234
 235                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 236                                 QBrush(ThresholdColorHi));
 237                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 238                                 QBrush(ThresholdColorNe));
 239                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 240                                 QBrush(ThresholdColorLo));
 241                 } else {
 242                         int thr = visual_y - thresholds[0] * scale_;
 243                         thr = min(max(thr, top), btm);
 244
 245                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 246                                 QBrush(ThresholdColorHi));
 247                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 248                                 QBrush(ThresholdColorLo));
 249                 }
 250
 251                 paint_axis(p, pp, get_visual_y());
 252         } else {
 253                 Trace::paint_back(p, pp);
 254                 paint_axis(p, pp, get_visual_y());
 255         }
 256 }
 257
 258 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 259 {
 260         assert(base_->analog_data());
 261         assert(owner_);
 262
 263         const int y = get_visual_y();
 264
 265         if (!base_->enabled())
 266                 return;
 267
 268         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 269                 paint_grid(p, y, pp.left(), pp.right());
 270
 271                 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 272                         base_->analog_data()->analog_segments();
 273                 if (segments.empty())
 274                         return;
 275
 276                 shared_ptr<pv::data::AnalogSegment> segment;
 277                 try {
 278                         segment = segments.at(current_segment_);
 279                 } catch (out_of_range) {
 280                         qDebug() << "Current analog segment out of range for signal" << base_->name();
 281                         return;
 282                 }
 283
 284                 const double pixels_offset = pp.pixels_offset();
 285                 const double samplerate = max(1.0, segment->samplerate());
 286                 const pv::util::Timestamp& start_time = segment->start_time();
 287                 const int64_t last_sample = segment->get_sample_count() - 1;
 288                 const double samples_per_pixel = samplerate * pp.scale();
 289                 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 290                 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 291
 292                 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 293                         (int64_t)0), last_sample);
 294                 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 295                         (int64_t)0), last_sample);
 296
 297                 if (samples_per_pixel < EnvelopeThreshold)
 298                         paint_trace(p, segment, y, pp.left(),
 299                                 start_sample, end_sample,
 300                                 pixels_offset, samples_per_pixel);
 301                 else
 302                         paint_envelope(p, segment, y, pp.left(),
 303                                 start_sample, end_sample,
 304                                 pixels_offset, samples_per_pixel);
 305         }
 306
 307         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 308                 paint_logic_mid(p, pp);
 309 }
 310
 311 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 312 {
 313         if (!enabled())
 314                 return;
 315
 316         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 317                 const int y = get_visual_y();
 318
 319                 // Show the info section on the right side of the trace
 320                 const QString infotext = QString("%1 V/div").arg(resolution_);
 321
 322                 p.setPen(base_->colour());
 323                 p.setFont(QApplication::font());
 324
 325                 const QRectF bounding_rect = QRectF(pp.left(),
 326                                 y + v_extents().first,
 327                                 pp.width() - InfoTextMarginRight,
 328                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 329
 330                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 331         }
 332 }
 333
 334 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 335 {
 336         p.setRenderHint(QPainter::Antialiasing, false);
 337
 338         GlobalSettings settings;
 339         const bool show_analog_minor_grid =
 340                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 341
 342         if (pos_vdivs_ > 0) {
 343                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 344                 for (int i = 1; i <= pos_vdivs_; i++) {
 345                         const float dy = i * div_height_;
 346                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 347                 }
 348         }
 349
 350         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 351                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 352                 for (int i = 0; i < pos_vdivs_; i++) {
 353                         const float dy = i * div_height_;
 354                         const float dy25 = dy + (0.25 * div_height_);
 355                         const float dy50 = dy + (0.50 * div_height_);
 356                         const float dy75 = dy + (0.75 * div_height_);
 357                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 358                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 359                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 360                 }
 361         }
 362
 363         if (neg_vdivs_ > 0) {
 364                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 365                 for (int i = 1; i <= neg_vdivs_; i++) {
 366                         const float dy = i * div_height_;
 367                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 368                 }
 369         }
 370
 371         if ((pos_vdivs_ > 0) && show_analog_minor_grid) {
 372                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 373                 for (int i = 0; i < neg_vdivs_; i++) {
 374                         const float dy = i * div_height_;
 375                         const float dy25 = dy + (0.25 * div_height_);
 376                         const float dy50 = dy + (0.50 * div_height_);
 377                         const float dy75 = dy + (0.75 * div_height_);
 378                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 379                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 380                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 381                 }
 382         }
 383
 384         p.setRenderHint(QPainter::Antialiasing, true);
 385 }
 386
 387 void AnalogSignal::paint_trace(QPainter &p,
 388         const shared_ptr<pv::data::AnalogSegment> &segment,
 389         int y, int left, const int64_t start, const int64_t end,
 390         const double pixels_offset, const double samples_per_pixel)
 391 {
 392         if (end <= start)
 393                 return;
 394
 395         bool paint_thr_dots =
 396                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 397                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 398
 399         vector<double> thresholds;
 400         if (paint_thr_dots)
 401                 thresholds = base_->get_conversion_thresholds();
 402
 403         // Calculate and paint the sampling points if enabled and useful
 404         GlobalSettings settings;
 405         const bool show_sampling_points =
 406                 (settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() ||
 407                 paint_thr_dots) && (samples_per_pixel < 0.25);
 408
 409         p.setPen(base_->colour());
 410
 411         const int64_t points_count = end - start;
 412
 413         QPointF *points = new QPointF[points_count];
 414         QPointF *point = points;
 415
 416         vector<QRectF> sampling_points[3];
 417
 418         int64_t sample_count = min(points_count, TracePaintBlockSize);
 419         int64_t block_sample = 0;
 420         float *sample_block = new float[TracePaintBlockSize];
 421         segment->get_samples(start, start + sample_count, sample_block);
 422
 423         const int w = 2;
 424         for (int64_t sample = start; sample != end; sample++, block_sample++) {
 425
 426                 if (block_sample == TracePaintBlockSize) {
 427                         block_sample = 0;
 428                         sample_count = min(points_count - sample, TracePaintBlockSize);
 429                         segment->get_samples(sample, sample + sample_count, sample_block);
 430                 }
 431
 432                 const float x = (sample / samples_per_pixel -
 433                         pixels_offset) + left;
 434
 435                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 436
 437                 if (show_sampling_points) {
 438                         int idx = 0;  // Neutral
 439
 440                         if (paint_thr_dots) {
 441                                 if (thresholds.size() == 1)
 442                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 443                                 else if (thresholds.size() == 2) {
 444                                         if (sample_block[block_sample] > thresholds[1])
 445                                                 idx = 2;  // High
 446                                         else if (sample_block[block_sample] < thresholds[0])
 447                                                 idx = 1;  // Low
 448                                 }
 449                         }
 450
 451                         sampling_points[idx].push_back(
 452                                 QRectF(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w));
 453                 }
 454         }
 455         delete[] sample_block;
 456
 457         p.drawPolyline(points, points_count);
 458
 459         if (show_sampling_points) {
 460                 if (paint_thr_dots) {
 461                         p.setPen(SamplingPointColourNe);
 462                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 463                         p.setPen(SamplingPointColourLo);
 464                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 465                         p.setPen(SamplingPointColourHi);
 466                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 467                 } else {
 468                         p.setPen(SamplingPointColour);
 469                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 470                 }
 471         }
 472
 473         delete[] points;
 474 }
 475
 476 void AnalogSignal::paint_envelope(QPainter &p,
 477         const shared_ptr<pv::data::AnalogSegment> &segment,
 478         int y, int left, const int64_t start, const int64_t end,
 479         const double pixels_offset, const double samples_per_pixel)
 480 {
 481         using pv::data::AnalogSegment;
 482
 483         AnalogSegment::EnvelopeSection e;
 484         segment->get_envelope_section(e, start, end, samples_per_pixel);
 485
 486         if (e.length < 2)
 487                 return;
 488
 489         p.setPen(QPen(Qt::NoPen));
 490         p.setBrush(base_->colour());
 491
 492         QRectF *const rects = new QRectF[e.length];
 493         QRectF *rect = rects;
 494
 495         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 496                 const float x = ((e.scale * sample + e.start) /
 497                         samples_per_pixel - pixels_offset) + left;
 498                 const AnalogSegment::EnvelopeSample *const s =
 499                         e.samples + sample;
 500
 501                 // We overlap this sample with the next so that vertical
 502                 // gaps do not appear during steep rising or falling edges
 503                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 504                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 505
 506                 float h = b - t;
 507                 if (h >= 0.0f && h <= 1.0f)
 508                         h = 1.0f;
 509                 if (h <= 0.0f && h >= -1.0f)
 510                         h = -1.0f;
 511
 512                 *rect++ = QRectF(x, t, 1.0f, h);
 513         }
 514
 515         p.drawRects(rects, e.length);
 516
 517         delete[] rects;
 518         delete[] e.samples;
 519 }
 520
 521 void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp)
 522 {
 523         QLineF *line;
 524
 525         vector< pair<int64_t, bool> > edges;
 526
 527         assert(base_);
 528
 529         const int y = get_visual_y();
 530
 531         if (!base_->enabled() || !base_->logic_data())
 532                 return;
 533
 534         const int signal_margin =
 535                 QFontMetrics(QApplication::font()).height() / 2;
 536
 537         const int ph = min(pos_vdivs_, 1) * div_height_;
 538         const int nh = min(neg_vdivs_, 1) * div_height_;
 539         const float high_offset = y - ph + signal_margin + 0.5f;
 540         const float low_offset = y + nh - signal_margin - 0.5f;
 541
 542         const deque< shared_ptr<pv::data::LogicSegment> > &segments =
 543                 base_->logic_data()->logic_segments();
 544
 545         if (segments.empty())
 546                 return;
 547
 548         shared_ptr<pv::data::LogicSegment> segment;
 549         try {
 550                 segment = segments.at(current_segment_);
 551         } catch (out_of_range) {
 552                 qDebug() << "Current logic segment out of range for signal" << base_->name();
 553                 return;
 554         }
 555
 556         double samplerate = segment->samplerate();
 557
 558         // Show sample rate as 1Hz when it is unknown
 559         if (samplerate == 0.0)
 560                 samplerate = 1.0;
 561
 562         const double pixels_offset = pp.pixels_offset();
 563         const pv::util::Timestamp& start_time = segment->start_time();
 564         const int64_t last_sample = segment->get_sample_count() - 1;
 565         const double samples_per_pixel = samplerate * pp.scale();
 566         const double pixels_per_sample = 1 / samples_per_pixel;
 567         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 568         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 569
 570         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 571                 (int64_t)0), last_sample);
 572         const uint64_t end_sample = min(max(ceil(end).convert_to<int64_t>(),
 573                 (int64_t)0), last_sample);
 574
 575         segment->get_subsampled_edges(edges, start_sample, end_sample,
 576                 samples_per_pixel / LogicSignal::Oversampling, 0);
 577         assert(edges.size() >= 2);
 578
 579         // Check whether we need to paint the sampling points
 580         GlobalSettings settings;
 581         const bool show_sampling_points =
 582                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool() &&
 583                 (samples_per_pixel < 0.25);
 584
 585         vector<QRectF> sampling_points;
 586         float sampling_point_x = 0.0f;
 587         int64_t sampling_point_sample = start_sample;
 588         const int w = 2;
 589
 590         if (show_sampling_points) {
 591                 sampling_points.reserve(end_sample - start_sample + 1);
 592                 sampling_point_x = (edges.cbegin()->first / samples_per_pixel - pixels_offset) + pp.left();
 593         }
 594
 595         // Paint the edges
 596         const unsigned int edge_count = edges.size() - 2;
 597         QLineF *const edge_lines = new QLineF[edge_count];
 598         line = edge_lines;
 599
 600         for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) {
 601                 const float x = ((*i).first / samples_per_pixel -
 602                         pixels_offset) + pp.left();
 603                 *line++ = QLineF(x, high_offset, x, low_offset);
 604
 605                 if (show_sampling_points)
 606                         while (sampling_point_sample < (*i).first) {
 607                                 const float y = (*i).second ? low_offset : high_offset;
 608                                 sampling_points.emplace_back(
 609                                         QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 610                                 sampling_point_sample++;
 611                                 sampling_point_x += pixels_per_sample;
 612                         };
 613         }
 614
 615         // Calculate the sample points from the last edge to the end of the trace
 616         if (show_sampling_points)
 617                 while ((uint64_t)sampling_point_sample <= end_sample) {
 618                         // Signal changed after the last edge, so the level is inverted
 619                         const float y = (edges.cend() - 1)->second ? high_offset : low_offset;
 620                         sampling_points.emplace_back(
 621                                 QRectF(sampling_point_x - (w / 2), y - (w / 2), w, w));
 622                         sampling_point_sample++;
 623                         sampling_point_x += pixels_per_sample;
 624                 };
 625
 626         p.setPen(LogicSignal::EdgeColour);
 627         p.drawLines(edge_lines, edge_count);
 628         delete[] edge_lines;
 629
 630         // Paint the caps
 631         const unsigned int max_cap_line_count = edges.size();
 632         QLineF *const cap_lines = new QLineF[max_cap_line_count];
 633
 634         p.setPen(LogicSignal::HighColour);
 635         paint_logic_caps(p, cap_lines, edges, true, samples_per_pixel,
 636                 pixels_offset, pp.left(), high_offset);
 637         p.setPen(LogicSignal::LowColour);
 638         paint_logic_caps(p, cap_lines, edges, false, samples_per_pixel,
 639                 pixels_offset, pp.left(), low_offset);
 640
 641         delete[] cap_lines;
 642
 643         // Paint the sampling points
 644         if (show_sampling_points) {
 645                 p.setPen(SamplingPointColour);
 646                 p.drawRects(sampling_points.data(), sampling_points.size());
 647         }
 648 }
 649
 650 void AnalogSignal::paint_logic_caps(QPainter &p, QLineF *const lines,
 651         vector< pair<int64_t, bool> > &edges, bool level,
 652         double samples_per_pixel, double pixels_offset, float x_offset,
 653         float y_offset)
 654 {
 655         QLineF *line = lines;
 656
 657         for (auto i = edges.begin(); i != (edges.end() - 1); i++)
 658                 if ((*i).second == level) {
 659                         *line++ = QLineF(
 660                                 ((*i).first / samples_per_pixel -
 661                                         pixels_offset) + x_offset, y_offset,
 662                                 ((*(i+1)).first / samples_per_pixel -
 663                                         pixels_offset) + x_offset, y_offset);
 664                 }
 665
 666         p.drawLines(lines, line - lines);
 667 }
 668
 669 float AnalogSignal::get_resolution(int scale_index)
 670 {
 671         const float seq[] = {1.0f, 2.0f, 5.0f};
 672
 673         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 674         const div_t d = div((int)(scale_index + countof(seq) * offset),
 675                 countof(seq));
 676
 677         return powf(10.0f, d.quot - offset) * seq[d.rem];
 678 }
 679
 680 void AnalogSignal::update_scale()
 681 {
 682         resolution_ = get_resolution(scale_index_);
 683         scale_ = div_height_ / resolution_;
 684 }
 685
 686 void AnalogSignal::update_conversion_widgets()
 687 {
 688         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 689
 690         // Enable or disable widgets depending on conversion state
 691         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 692         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 693
 694         conv_threshold_cb_->clear();
 695
 696         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 697
 698         // Prevent the combo box from firing the "edit text changed" signal
 699         // as that would involuntarily select the first entry
 700         conv_threshold_cb_->blockSignals(true);
 701
 702         // Set available options depending on chosen conversion
 703         for (pair<QString, int> preset : presets)
 704                 conv_threshold_cb_->addItem(preset.first, preset.second);
 705
 706         map < QString, QVariant > options = base_->get_conversion_options();
 707
 708         if (conv_type == SignalBase::A2LConversionByThreshold) {
 709                 const vector<double> thresholds = base_->get_conversion_thresholds(
 710                                 SignalBase::A2LConversionByThreshold, true);
 711                 conv_threshold_cb_->addItem(
 712                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 713         }
 714
 715         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 716                 const vector<double> thresholds = base_->get_conversion_thresholds(
 717                                 SignalBase::A2LConversionBySchmittTrigger, true);
 718                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 719                                 QString::number(thresholds[0], 'f', 1),
 720                                 QString::number(thresholds[1], 'f', 1)), -1);
 721         }
 722
 723         int preset_id = base_->get_current_conversion_preset();
 724         conv_threshold_cb_->setCurrentIndex(
 725                         conv_threshold_cb_->findData(preset_id));
 726
 727         conv_threshold_cb_->blockSignals(false);
 728 }
 729
 730 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 731 {
 732         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 733                 base_->analog_data()->analog_segments();
 734
 735         if (segments.empty())
 736                 return;
 737
 738         static double prev_min = 0, prev_max = 0;
 739         double min = 0, max = 0;
 740
 741         for (shared_ptr<pv::data::AnalogSegment> segment : segments) {
 742                 pair<double, double> mm = segment->get_min_max();
 743                 min = std::min(min, mm.first);
 744                 max = std::max(max, mm.second);
 745         }
 746
 747         if ((min == prev_min) && (max == prev_max) && !force_update)
 748                 return;
 749
 750         prev_min = min;
 751         prev_max = max;
 752
 753         // If we're allowed to alter the div assignment...
 754         if (!keep_divs) {
 755                 // Use all divs for the positive range if there are no negative values
 756                 if ((min == 0) && (neg_vdivs_ > 0)) {
 757                         pos_vdivs_ += neg_vdivs_;
 758                         neg_vdivs_ = 0;
 759                 }
 760
 761                 // Split up the divs if there are negative values but no negative divs
 762                 if ((min < 0) && (neg_vdivs_ == 0)) {
 763                         neg_vdivs_ = pos_vdivs_ / 2;
 764                         pos_vdivs_ -= neg_vdivs_;
 765                 }
 766         }
 767
 768         // If there is still no positive div when we need it, add one
 769         // (this can happen when pos_vdivs==neg_vdivs==0)
 770         if ((max > 0) && (pos_vdivs_ == 0)) {
 771                 pos_vdivs_ = 1;
 772                 owner_->extents_changed(false, true);
 773         }
 774
 775         // If there is still no negative div when we need it, add one
 776         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 777         if ((min < 0) && (neg_vdivs_ == 0)) {
 778                 neg_vdivs_ = 1;
 779                 owner_->extents_changed(false, true);
 780         }
 781
 782         double min_value_per_div;
 783         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 784                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 785         else if (pos_vdivs_ > 0)
 786                 min_value_per_div = max / pos_vdivs_;
 787         else
 788                 min_value_per_div = -min / neg_vdivs_;
 789
 790         // Find first scale value that is bigger than the value we need
 791         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 792                 if (get_resolution(i) > min_value_per_div) {
 793                         scale_index_ = i;
 794                         break;
 795                 }
 796
 797         update_scale();
 798 }
 799
 800 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 801 {
 802         // Add the standard options
 803         Signal::populate_popup_form(parent, form);
 804
 805         QFormLayout *const layout = new QFormLayout;
 806
 807         // Add div-related settings
 808         pvdiv_sb_ = new QSpinBox(parent);
 809         pvdiv_sb_->setRange(0, MaximumVDivs);
 810         pvdiv_sb_->setValue(pos_vdivs_);
 811         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 812                 this, SLOT(on_pos_vdivs_changed(int)));
 813         layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 814
 815         nvdiv_sb_ = new QSpinBox(parent);
 816         nvdiv_sb_->setRange(0, MaximumVDivs);
 817         nvdiv_sb_->setValue(neg_vdivs_);
 818         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 819                 this, SLOT(on_neg_vdivs_changed(int)));
 820         layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 821
 822         div_height_sb_ = new QSpinBox(parent);
 823         div_height_sb_->setRange(20, 1000);
 824         div_height_sb_->setSingleStep(5);
 825         div_height_sb_->setSuffix(tr(" pixels"));
 826         div_height_sb_->setValue(div_height_);
 827         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 828                 this, SLOT(on_div_height_changed(int)));
 829         layout->addRow(tr("Div height"), div_height_sb_);
 830
 831         // Add the vertical resolution
 832         resolution_cb_ = new QComboBox(parent);
 833
 834         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 835                 const QString label = QString("%1").arg(get_resolution(i));
 836                 resolution_cb_->insertItem(0, label, QVariant(i));
 837         }
 838
 839         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 840         resolution_cb_->setCurrentIndex(cur_idx);
 841
 842         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 843                 this, SLOT(on_resolution_changed(int)));
 844
 845         QGridLayout *const vdiv_layout = new QGridLayout;
 846         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 847         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 848         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 849
 850         layout->addRow(tr("Vertical resolution"), vdiv_layout);
 851
 852         // Add the autoranging checkbox
 853         QCheckBox* autoranging_cb = new QCheckBox();
 854         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 855
 856         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 857                 this, SLOT(on_autoranging_changed(int)));
 858
 859         layout->addRow(tr("Autoranging"), autoranging_cb);
 860
 861         // Add the conversion type dropdown
 862         conversion_cb_ = new QComboBox();
 863
 864         conversion_cb_->addItem(tr("none"),
 865                 SignalBase::NoConversion);
 866         conversion_cb_->addItem(tr("to logic via threshold"),
 867                 SignalBase::A2LConversionByThreshold);
 868         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 869                 SignalBase::A2LConversionBySchmittTrigger);
 870
 871         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 872         conversion_cb_->setCurrentIndex(cur_idx);
 873
 874         layout->addRow(tr("Conversion"), conversion_cb_);
 875
 876         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 877                 this, SLOT(on_conversion_changed(int)));
 878
 879     // Add the conversion threshold settings
 880     conv_threshold_cb_ = new QComboBox();
 881     conv_threshold_cb_->setEditable(true);
 882
 883     layout->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 884
 885     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 886             this, SLOT(on_conv_threshold_changed(int)));
 887     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString)),
 888             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 889
 890         // Add the display type dropdown
 891         display_type_cb_ = new QComboBox();
 892
 893         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 894         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 895         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 896
 897         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 898         display_type_cb_->setCurrentIndex(cur_idx);
 899
 900         layout->addRow(tr("Show traces for"), display_type_cb_);
 901
 902         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 903                 this, SLOT(on_display_type_changed(int)));
 904
 905         // Update the conversion widget contents and states
 906         update_conversion_widgets();
 907
 908         form->addRow(layout);
 909 }
 910
 911 void AnalogSignal::on_min_max_changed(float min, float max)
 912 {
 913         (void)min;
 914         (void)max;
 915
 916         if (autoranging_)
 917                 perform_autoranging(false, false);
 918 }
 919
 920 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 921 {
 922         if (vdivs == pos_vdivs_)
 923                 return;
 924
 925         pos_vdivs_ = vdivs;
 926
 927         // There has to be at least one div, positive or negative
 928         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 929                 pos_vdivs_ = 1;
 930                 if (pvdiv_sb_)
 931                         pvdiv_sb_->setValue(pos_vdivs_);
 932         }
 933
 934         if (autoranging_) {
 935                 perform_autoranging(true, true);
 936
 937                 // It could be that a positive or negative div was added, so update
 938                 if (pvdiv_sb_) {
 939                         pvdiv_sb_->setValue(pos_vdivs_);
 940                         nvdiv_sb_->setValue(neg_vdivs_);
 941                 }
 942         }
 943
 944         if (owner_) {
 945                 // Call order is important, otherwise the lazy event handler won't work
 946                 owner_->extents_changed(false, true);
 947                 owner_->row_item_appearance_changed(false, true);
 948         }
 949 }
 950
 951 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 952 {
 953         if (vdivs == neg_vdivs_)
 954                 return;
 955
 956         neg_vdivs_ = vdivs;
 957
 958         // There has to be at least one div, positive or negative
 959         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 960                 pos_vdivs_ = 1;
 961                 if (pvdiv_sb_)
 962                         pvdiv_sb_->setValue(pos_vdivs_);
 963         }
 964
 965         if (autoranging_) {
 966                 perform_autoranging(true, true);
 967
 968                 // It could be that a positive or negative div was added, so update
 969                 if (pvdiv_sb_) {
 970                         pvdiv_sb_->setValue(pos_vdivs_);
 971                         nvdiv_sb_->setValue(neg_vdivs_);
 972                 }
 973         }
 974
 975         if (owner_) {
 976                 // Call order is important, otherwise the lazy event handler won't work
 977                 owner_->extents_changed(false, true);
 978                 owner_->row_item_appearance_changed(false, true);
 979         }
 980 }
 981
 982 void AnalogSignal::on_div_height_changed(int height)
 983 {
 984         div_height_ = height;
 985         update_scale();
 986
 987         if (owner_) {
 988                 // Call order is important, otherwise the lazy event handler won't work
 989                 owner_->extents_changed(false, true);
 990                 owner_->row_item_appearance_changed(false, true);
 991         }
 992 }
 993
 994 void AnalogSignal::on_resolution_changed(int index)
 995 {
 996         scale_index_ = resolution_cb_->itemData(index).toInt();
 997         update_scale();
 998
 999         if (owner_)
1000                 owner_->row_item_appearance_changed(false, true);
1001 }
1002
1003 void AnalogSignal::on_autoranging_changed(int state)
1004 {
1005         autoranging_ = (state == Qt::Checked);
1006
1007         if (autoranging_)
1008                 perform_autoranging(false, true);
1009
1010         if (owner_) {
1011                 // Call order is important, otherwise the lazy event handler won't work
1012                 owner_->extents_changed(false, true);
1013                 owner_->row_item_appearance_changed(false, true);
1014         }
1015 }
1016
1017 void AnalogSignal::on_conversion_changed(int index)
1018 {
1019         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1020
1021         SignalBase::ConversionType conv_type =
1022                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1023
1024         if (conv_type != old_conv_type) {
1025                 base_->set_conversion_type(conv_type);
1026                 update_conversion_widgets();
1027
1028                 if (owner_)
1029                         owner_->row_item_appearance_changed(false, true);
1030         }
1031 }
1032
1033 void AnalogSignal::on_conv_threshold_changed(int index)
1034 {
1035         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1036
1037         // Note: index is set to -1 if the text in the combo box matches none of
1038         // the entries in the combo box
1039
1040         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1041                 return;
1042
1043         // The combo box entry with the custom value has user_data set to -1
1044         const int user_data = conv_threshold_cb_->findText(
1045                         conv_threshold_cb_->currentText());
1046
1047         const bool use_custom_thr = (index == -1) || (user_data == -1);
1048
1049         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1050                 // Not one of the preset values, try to parse the combo box text
1051                 // Note: Regex loosely based on
1052                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1053                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1054                 QString re2 = "([a-zA-Z]*)"; // SI unit
1055                 QRegExp regex(re1 + re2);
1056
1057                 const QString text = conv_threshold_cb_->currentText();
1058                 if (!regex.exactMatch(text))
1059                         return;  // String doesn't match the regex
1060
1061                 QStringList tokens = regex.capturedTexts();
1062
1063                 // For now, we simply assume that the unit is volt without modifiers
1064                 const double thr = tokens.at(1).toDouble();
1065
1066                 // Only restart the conversion if the threshold was updated.
1067                 // We're starting a delayed conversion because the user may still be
1068                 // typing and the UI would lag if we kept on restarting it immediately
1069                 if (base_->set_conversion_option("threshold_value", thr))
1070                         base_->start_conversion(true);
1071         }
1072
1073         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1074                 // Not one of the preset values, try to parse the combo box text
1075                 // Note: Regex loosely based on
1076                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1077                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1078                 QString re2 = "([a-zA-Z]*)"; // SI unit
1079                 QString re3 = "\\/"; // Forward slash, not captured
1080                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1081                 QString re5 = "([a-zA-Z]*)"; // SI unit
1082                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1083
1084                 const QString text = conv_threshold_cb_->currentText();
1085                 if (!regex.exactMatch(text))
1086                         return;  // String doesn't match the regex
1087
1088                 QStringList tokens = regex.capturedTexts();
1089
1090                 // For now, we simply assume that the unit is volt without modifiers
1091                 const double low_thr = tokens.at(1).toDouble();
1092                 const double high_thr = tokens.at(3).toDouble();
1093
1094                 // Only restart the conversion if one of the options was updated.
1095                 // We're starting a delayed conversion because the user may still be
1096                 // typing and the UI would lag if we kept on restarting it immediately
1097                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1098                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1099                 if (o1 || o2)
1100                         base_->start_conversion(true);  // Start delayed conversion
1101         }
1102
1103         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1104
1105         // Immediately start the conversion if we're not using custom values
1106         // (i.e. we're using one of the presets)
1107         if (!use_custom_thr)
1108                 base_->start_conversion();
1109 }
1110
1111 void AnalogSignal::on_delayed_conversion_starter()
1112 {
1113         base_->start_conversion();
1114 }
1115
1116 void AnalogSignal::on_display_type_changed(int index)
1117 {
1118         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1119
1120         if (owner_)
1121                 owner_->row_item_appearance_changed(false, true);
1122 }
1123
1124 void AnalogSignal::on_settingViewConversionThresholdDispMode_changed(const QVariant new_value)
1125 {
1126         conversion_threshold_disp_mode_ = new_value.toInt();
1127
1128         if (owner_)
1129                 owner_->row_item_appearance_changed(false, true);
1130 }
1131
1132 } // namespace trace
1133 } // namespace views
1134 } // namespace pv