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/util.hpp"
  42 #include "pv/data/analog.hpp"
  43 #include "pv/data/analogsegment.hpp"
  44 #include "pv/data/logic.hpp"
  45 #include "pv/data/logicsegment.hpp"
  46 #include "pv/data/signalbase.hpp"
  47 #include "pv/globalsettings.hpp"
  48
  49 #include <libsigrokcxx/libsigrokcxx.hpp>
  50
  51 using std::deque;
  52 using std::div;
  53 using std::div_t;
  54 // Note that "using std::isnan;" is _not_ put here since that would break
  55 // compilation on some platforms. Use "std::isnan()" instead in checks below.
  56 using std::max;
  57 using std::make_pair;
  58 using std::min;
  59 using std::numeric_limits;
  60 using std::out_of_range;
  61 using std::pair;
  62 using std::shared_ptr;
  63 using std::vector;
  64
  65 using pv::data::LogicSegment;
  66 using pv::data::SignalBase;
  67 using pv::util::SIPrefix;
  68 using pv::util::determine_value_prefix;
  69
  70 namespace pv {
  71 namespace views {
  72 namespace trace {
  73
  74 const QPen AnalogSignal::AxisPen(QColor(0, 0, 0, 30 * 256 / 100), 2);
  75 const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40 * 256 / 100);
  76 const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20 * 256 / 100);
  77
  78 const QColor AnalogSignal::SamplingPointColorLo = QColor(200, 0, 0, 80 * 256 / 100);
  79 const QColor AnalogSignal::SamplingPointColorNe = QColor(0,   0, 0, 80 * 256 / 100);
  80 const QColor AnalogSignal::SamplingPointColorHi = QColor(0, 200, 0, 80 * 256 / 100);
  81
  82 const QColor AnalogSignal::ThresholdColor = QColor(0, 0, 0, 30 * 256 / 100);
  83 const QColor AnalogSignal::ThresholdColorLo = QColor(255, 0, 0, 8 * 256 / 100);
  84 const QColor AnalogSignal::ThresholdColorNe = QColor(0,   0, 0, 10 * 256 / 100);
  85 const QColor AnalogSignal::ThresholdColorHi = QColor(0, 255, 0, 8 * 256 / 100);
  86
  87 const int64_t AnalogSignal::TracePaintBlockSize = 1024 * 1024;  // 4 MiB (due to float)
  88 const float AnalogSignal::EnvelopeThreshold = 64.0f;
  89
  90 const int AnalogSignal::MaximumVDivs = 10;
  91 const int AnalogSignal::MinScaleIndex = -6;  // 0.01 units/div
  92 const int AnalogSignal::MaxScaleIndex = 10;  // 1000 units/div
  93
  94 const int AnalogSignal::InfoTextMarginRight = 20;
  95 const int AnalogSignal::InfoTextMarginBottom = 5;
  96
  97 AnalogSignal::AnalogSignal(pv::Session &session, shared_ptr<data::SignalBase> base) :
  98         LogicSignal(session, base),
  99         value_at_hover_pos_(std::numeric_limits<float>::quiet_NaN()),
 100         scale_index_(4), // 20 per div
 101         pos_vdivs_(1),
 102         neg_vdivs_(1),
 103         resolution_(0),
 104         display_type_(DisplayBoth),
 105         autoranging_(true)
 106 {
 107         axis_pen_ = AxisPen;
 108
 109         pv::data::Analog* analog_data =
 110                 dynamic_cast<pv::data::Analog*>(base_->analog_data().get());
 111
 112         connect(analog_data, SIGNAL(min_max_changed(float, float)),
 113                 this, SLOT(on_min_max_changed(float, float)));
 114
 115         GlobalSettings settings;
 116         show_sampling_points_ =
 117                 settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 118         fill_high_areas_ =
 119                 settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool();
 120         high_fill_color_ = QColor::fromRgba(settings.value(
 121                 GlobalSettings::Key_View_FillSignalHighAreaColor).value<uint32_t>());
 122         show_analog_minor_grid_ =
 123                 settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 124         conversion_threshold_disp_mode_ =
 125                 settings.value(GlobalSettings::Key_View_ConversionThresholdDispMode).toInt();
 126         div_height_ = settings.value(GlobalSettings::Key_View_DefaultDivHeight).toInt();
 127
 128         update_logic_level_offsets();
 129         update_scale();
 130 }
 131
 132 std::map<QString, QVariant> AnalogSignal::save_settings() const
 133 {
 134         LogicSignal::save_settings();
 135
 136         std::map<QString, QVariant> result;
 137
 138         result["pos_vdivs"] = pos_vdivs_;
 139         result["neg_vdivs"] = neg_vdivs_;
 140         result["scale_index"] = scale_index_;
 141         result["display_type"] = display_type_;
 142         result["autoranging"] = pos_vdivs_;
 143         result["div_height"] = div_height_;
 144
 145         return result;
 146 }
 147
 148 void AnalogSignal::restore_settings(std::map<QString, QVariant> settings)
 149 {
 150         LogicSignal::restore_settings(settings);
 151
 152         auto entry = settings.find("pos_vdivs");
 153         if (entry != settings.end())
 154                 pos_vdivs_ = settings["pos_vdivs"].toInt();
 155
 156         entry = settings.find("neg_vdivs");
 157         if (entry != settings.end())
 158                 neg_vdivs_ = settings["neg_vdivs"].toInt();
 159
 160         entry = settings.find("scale_index");
 161         if (entry != settings.end()) {
 162                 scale_index_ = settings["scale_index"].toInt();
 163                 update_scale();
 164         }
 165
 166         entry = settings.find("display_type");
 167         if (entry != settings.end())
 168                 display_type_ = (DisplayType)(settings["display_type"].toInt());
 169
 170         entry = settings.find("autoranging");
 171         if (entry != settings.end())
 172                 autoranging_ = settings["autoranging"].toBool();
 173
 174         entry = settings.find("div_height");
 175         if (entry != settings.end()) {
 176                 const int old_height = div_height_;
 177                 div_height_ = settings["div_height"].toInt();
 178
 179                 update_logic_level_offsets();
 180
 181                 if ((div_height_ != old_height) && owner_) {
 182                         // Call order is important, otherwise the lazy event handler won't work
 183                         owner_->extents_changed(false, true);
 184                         owner_->row_item_appearance_changed(false, true);
 185                 }
 186         }
 187 }
 188
 189 pair<int, int> AnalogSignal::v_extents() const
 190 {
 191         const int ph = pos_vdivs_ * div_height_;
 192         const int nh = neg_vdivs_ * div_height_;
 193         return make_pair(-ph, nh);
 194 }
 195
 196 void AnalogSignal::paint_back(QPainter &p, ViewItemPaintParams &pp)
 197 {
 198         if (!base_->enabled())
 199                 return;
 200
 201         bool paint_thr_bg =
 202                 conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Background;
 203
 204         const vector<double> thresholds = base_->get_conversion_thresholds();
 205
 206         // Only display thresholds if we have some and we show analog samples
 207         if ((thresholds.size() > 0) && paint_thr_bg &&
 208                 ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth))) {
 209
 210                 const int visual_y = get_visual_y();
 211                 const pair<int, int> extents = v_extents();
 212                 const int top = visual_y + extents.first;
 213                 const int btm = visual_y + extents.second;
 214
 215                 // Draw high/neutral/low areas
 216                 if (thresholds.size() == 2) {
 217                         int thr_lo = visual_y - thresholds[0] * scale_;
 218                         int thr_hi = visual_y - thresholds[1] * scale_;
 219                         thr_lo = min(max(thr_lo, top), btm);
 220                         thr_hi = min(max(thr_hi, top), btm);
 221
 222                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr_hi - top),
 223                                 QBrush(ThresholdColorHi));
 224                         p.fillRect(QRectF(pp.left(), thr_hi, pp.width(), thr_lo - thr_hi),
 225                                 QBrush(ThresholdColorNe));
 226                         p.fillRect(QRectF(pp.left(), thr_lo, pp.width(), btm - thr_lo),
 227                                 QBrush(ThresholdColorLo));
 228                 } else {
 229                         int thr = visual_y - thresholds[0] * scale_;
 230                         thr = min(max(thr, top), btm);
 231
 232                         p.fillRect(QRectF(pp.left(), top, pp.width(), thr - top),
 233                                 QBrush(ThresholdColorHi));
 234                         p.fillRect(QRectF(pp.left(), thr, pp.width(), btm - thr),
 235                                 QBrush(ThresholdColorLo));
 236                 }
 237
 238                 paint_axis(p, pp, get_visual_y());
 239         } else {
 240                 Signal::paint_back(p, pp);
 241                 paint_axis(p, pp, get_visual_y());
 242         }
 243 }
 244
 245 void AnalogSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp)
 246 {
 247         assert(base_->analog_data());
 248         assert(owner_);
 249
 250         const int y = get_visual_y();
 251
 252         if (!base_->enabled())
 253                 return;
 254
 255         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 256                 paint_grid(p, y, pp.left(), pp.right());
 257
 258                 shared_ptr<pv::data::AnalogSegment> segment = get_analog_segment_to_paint();
 259
 260                 if (segment && (segment->get_sample_count() > 0)) {
 261                         const double pixels_offset = pp.pixels_offset();
 262                         const double samplerate = max(1.0, segment->samplerate());
 263                         const pv::util::Timestamp& start_time = segment->start_time();
 264                         const int64_t last_sample = (int64_t)segment->get_sample_count() - 1;
 265                         const double samples_per_pixel = samplerate * pp.scale();
 266                         const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
 267                         const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
 268
 269                         const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
 270                                 (int64_t)0), last_sample);
 271                         const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
 272                                 (int64_t)0), last_sample);
 273
 274                         if (samples_per_pixel < EnvelopeThreshold)
 275                                 paint_trace(p, segment, y, pp.left(), start_sample, end_sample,
 276                                         pixels_offset, samples_per_pixel);
 277                         else
 278                                 paint_envelope(p, segment, y, pp.left(), start_sample, end_sample,
 279                                         pixels_offset, samples_per_pixel);
 280                 }
 281         }
 282
 283         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 284                 if (base_->logic_data())
 285                         LogicSignal::paint_mid(p, pp);
 286
 287         const QString err = base_->get_error_message();
 288         if (!err.isEmpty())
 289                 paint_error(p, pp);
 290 }
 291
 292 void AnalogSignal::paint_fore(QPainter &p, ViewItemPaintParams &pp)
 293 {
 294         if (!enabled())
 295                 return;
 296
 297         if ((display_type_ == DisplayAnalog) || (display_type_ == DisplayBoth)) {
 298                 const int y = get_visual_y();
 299
 300                 QString infotext;
 301
 302                 SIPrefix prefix;
 303                 if (fabs(signal_max_) > fabs(signal_min_))
 304                         prefix = determine_value_prefix(fabs(signal_max_));
 305                 else
 306                         prefix = determine_value_prefix(fabs(signal_min_));
 307
 308                 // Show the info section on the right side of the trace, including
 309                 // the value at the hover point when the hover marker is enabled
 310                 // and we have corresponding data available
 311                 if (show_hover_marker_ && !std::isnan(value_at_hover_pos_)) {
 312                         infotext = QString("[%1] %2 V/div")
 313                                 .arg(format_value_si(value_at_hover_pos_, prefix, 3, "V", false))
 314                                 .arg(resolution_);
 315                 } else
 316                         infotext = QString("%1 V/div").arg(resolution_);
 317
 318                 p.setPen(base_->color());
 319                 p.setFont(QApplication::font());
 320
 321                 const QRectF bounding_rect = QRectF(pp.left(),
 322                                 y + v_extents().first,
 323                                 pp.width() - InfoTextMarginRight,
 324                                 v_extents().second - v_extents().first - InfoTextMarginBottom);
 325
 326                 p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext);
 327
 328                 if (show_hover_marker_)
 329                         paint_hover_marker(p);
 330         }
 331
 332         if ((display_type_ == DisplayConverted) || (display_type_ == DisplayBoth))
 333                 LogicSignal::paint_fore(p, pp);
 334 }
 335
 336 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
 337 {
 338         bool was_antialiased = p.testRenderHint(QPainter::Antialiasing);
 339         p.setRenderHint(QPainter::Antialiasing, false);
 340
 341         if (pos_vdivs_ > 0) {
 342                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 343                 for (int i = 1; i <= pos_vdivs_; i++) {
 344                         const float dy = i * div_height_;
 345                         p.drawLine(QLineF(left, y - dy, right, y - dy));
 346                 }
 347         }
 348
 349         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 350                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 351                 for (int i = 0; i < pos_vdivs_; i++) {
 352                         const float dy = i * div_height_;
 353                         const float dy25 = dy + (0.25 * div_height_);
 354                         const float dy50 = dy + (0.50 * div_height_);
 355                         const float dy75 = dy + (0.75 * div_height_);
 356                         p.drawLine(QLineF(left, y - dy25, right, y - dy25));
 357                         p.drawLine(QLineF(left, y - dy50, right, y - dy50));
 358                         p.drawLine(QLineF(left, y - dy75, right, y - dy75));
 359                 }
 360         }
 361
 362         if (neg_vdivs_ > 0) {
 363                 p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
 364                 for (int i = 1; i <= neg_vdivs_; i++) {
 365                         const float dy = i * div_height_;
 366                         p.drawLine(QLineF(left, y + dy, right, y + dy));
 367                 }
 368         }
 369
 370         if ((pos_vdivs_ > 0) && show_analog_minor_grid_) {
 371                 p.setPen(QPen(GridMinorColor, 1, Qt::DashLine));
 372                 for (int i = 0; i < neg_vdivs_; i++) {
 373                         const float dy = i * div_height_;
 374                         const float dy25 = dy + (0.25 * div_height_);
 375                         const float dy50 = dy + (0.50 * div_height_);
 376                         const float dy75 = dy + (0.75 * div_height_);
 377                         p.drawLine(QLineF(left, y + dy25, right, y + dy25));
 378                         p.drawLine(QLineF(left, y + dy50, right, y + dy50));
 379                         p.drawLine(QLineF(left, y + dy75, right, y + dy75));
 380                 }
 381         }
 382
 383         p.setRenderHint(QPainter::Antialiasing, was_antialiased);
 384 }
 385
 386 void AnalogSignal::paint_trace(QPainter &p,
 387         const shared_ptr<pv::data::AnalogSegment> &segment,
 388         int y, int left, const int64_t start, const int64_t end,
 389         const double pixels_offset, const double samples_per_pixel)
 390 {
 391         if (end <= start)
 392                 return;
 393
 394         bool paint_thr_dots =
 395                 (base_->get_conversion_type() != data::SignalBase::NoConversion) &&
 396                 (conversion_threshold_disp_mode_ == GlobalSettings::ConvThrDispMode_Dots);
 397
 398         vector<double> thresholds;
 399         if (paint_thr_dots)
 400                 thresholds = base_->get_conversion_thresholds();
 401
 402         // Calculate and paint the sampling points if enabled and useful
 403         GlobalSettings settings;
 404         const bool show_sampling_points =
 405                 (show_sampling_points_ || paint_thr_dots) && (samples_per_pixel < 0.25);
 406
 407         p.setPen(base_->color());
 408
 409         const int64_t points_count = end - start + 1;
 410
 411         QPointF *points = new QPointF[points_count];
 412         QPointF *point = points;
 413
 414         vector<QRectF> sampling_points[3];
 415
 416         int64_t sample_count = min(points_count, TracePaintBlockSize);
 417         int64_t block_sample = 0;
 418         float *sample_block = new float[TracePaintBlockSize];
 419         segment->get_samples(start, start + sample_count, sample_block);
 420
 421         if (show_hover_marker_)
 422                 reset_pixel_values();
 423
 424         const int w = 2;
 425         for (int64_t sample = start; sample <= end; sample++, block_sample++) {
 426
 427                 // Fetch next block of samples if we finished the current one
 428                 if (block_sample == TracePaintBlockSize) {
 429                         block_sample = 0;
 430                         sample_count = min(points_count - sample, TracePaintBlockSize);
 431                         segment->get_samples(sample, sample + sample_count, sample_block);
 432                 }
 433
 434                 const float abs_x = sample / samples_per_pixel - pixels_offset;
 435                 const float x = left + abs_x;
 436
 437                 *point++ = QPointF(x, y - sample_block[block_sample] * scale_);
 438
 439                 // Generate the pixel<->value lookup table for the mouse hover
 440                 if (show_hover_marker_)
 441                         process_next_sample_value(abs_x, sample_block[block_sample]);
 442
 443                 // Create the sampling points if needed
 444                 if (show_sampling_points) {
 445                         int idx = 0;  // Neutral
 446
 447                         if (paint_thr_dots) {
 448                                 if (thresholds.size() == 1)
 449                                         idx = (sample_block[block_sample] >= thresholds[0]) ? 2 : 1;
 450                                 else if (thresholds.size() == 2) {
 451                                         if (sample_block[block_sample] > thresholds[1])
 452                                                 idx = 2;  // High
 453                                         else if (sample_block[block_sample] < thresholds[0])
 454                                                 idx = 1;  // Low
 455                                 }
 456                         }
 457
 458                         sampling_points[idx].emplace_back(x - (w / 2), y - sample_block[block_sample] * scale_ - (w / 2), w, w);
 459                 }
 460         }
 461         delete[] sample_block;
 462
 463         // QPainter::drawPolyline() is slow, let's paint the lines ourselves
 464         for (int64_t i = 1; i < points_count; i++)
 465                 p.drawLine(points[i - 1], points[i]);
 466
 467         if (show_sampling_points) {
 468                 if (paint_thr_dots) {
 469                         p.setPen(SamplingPointColorNe);
 470                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 471                         p.setPen(SamplingPointColorLo);
 472                         p.drawRects(sampling_points[1].data(), sampling_points[1].size());
 473                         p.setPen(SamplingPointColorHi);
 474                         p.drawRects(sampling_points[2].data(), sampling_points[2].size());
 475                 } else {
 476                         p.setPen(SamplingPointColor);
 477                         p.drawRects(sampling_points[0].data(), sampling_points[0].size());
 478                 }
 479         }
 480
 481         delete[] points;
 482 }
 483
 484 void AnalogSignal::paint_envelope(QPainter &p,
 485         const shared_ptr<pv::data::AnalogSegment> &segment,
 486         int y, int left, const int64_t start, const int64_t end,
 487         const double pixels_offset, const double samples_per_pixel)
 488 {
 489         using pv::data::AnalogSegment;
 490
 491         // Note: Envelope painting currently doesn't generate a pixel<->value lookup table
 492         if (show_hover_marker_)
 493                 reset_pixel_values();
 494
 495         AnalogSegment::EnvelopeSection e;
 496         segment->get_envelope_section(e, start, end, samples_per_pixel);
 497
 498         if (e.length < 2)
 499                 return;
 500
 501         p.setPen(QPen(Qt::NoPen));
 502         p.setBrush(base_->color());
 503
 504         QRectF *const rects = new QRectF[e.length];
 505         QRectF *rect = rects;
 506
 507         for (uint64_t sample = 0; sample < e.length - 1; sample++) {
 508                 const float x = ((e.scale * sample + e.start) /
 509                         samples_per_pixel - pixels_offset) + left;
 510
 511                 const AnalogSegment::EnvelopeSample *const s = e.samples + sample;
 512
 513                 // We overlap this sample with the next so that vertical
 514                 // gaps do not appear during steep rising or falling edges
 515                 const float b = y - max(s->max, (s + 1)->min) * scale_;
 516                 const float t = y - min(s->min, (s + 1)->max) * scale_;
 517
 518                 float h = b - t;
 519                 if (h >= 0.0f && h <= 1.0f)
 520                         h = 1.0f;
 521                 if (h <= 0.0f && h >= -1.0f)
 522                         h = -1.0f;
 523
 524                 *rect++ = QRectF(x, t, 1.0f, h);
 525         }
 526
 527         p.drawRects(rects, e.length);
 528
 529         delete[] rects;
 530         delete[] e.samples;
 531 }
 532
 533 shared_ptr<pv::data::AnalogSegment> AnalogSignal::get_analog_segment_to_paint() const
 534 {
 535         shared_ptr<pv::data::AnalogSegment> segment;
 536
 537         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 538                 base_->analog_data()->analog_segments();
 539
 540         if (!segments.empty()) {
 541                 if (segment_display_mode_ == ShowLastSegmentOnly)
 542                         segment = segments.back();
 543
 544                 if ((segment_display_mode_ == ShowSingleSegmentOnly) ||
 545                         (segment_display_mode_ == ShowLastCompleteSegmentOnly)) {
 546                         try {
 547                                 segment = segments.at(current_segment_);
 548                         } catch (out_of_range&) {
 549                                 qDebug() << "Current analog segment out of range for signal" << base_->name() << ":" << current_segment_;
 550                         }
 551                 }
 552         }
 553
 554         return segment;
 555 }
 556
 557 float AnalogSignal::get_resolution(int scale_index)
 558 {
 559         const float seq[] = {1.0f, 2.0f, 5.0f};
 560
 561         const int offset = numeric_limits<int>::max() / (2 * countof(seq));
 562         const div_t d = div((int)(scale_index + countof(seq) * offset),
 563                 countof(seq));
 564
 565         return powf(10.0f, d.quot - offset) * seq[d.rem];
 566 }
 567
 568 void AnalogSignal::update_scale()
 569 {
 570         resolution_ = get_resolution(scale_index_);
 571         scale_ = div_height_ / resolution_;
 572 }
 573
 574 void AnalogSignal::update_logic_level_offsets()
 575 {
 576         const int signal_margin = QFontMetrics(QApplication::font()).height() / 2;
 577
 578         const int ph = min(pos_vdivs_, 1) * div_height_;
 579         const int nh = min(neg_vdivs_, 1) * div_height_;
 580
 581         high_level_offset_ = -ph + signal_margin + 0.5f;
 582         low_level_offset_  =  nh - signal_margin - 0.5f;
 583 }
 584
 585 void AnalogSignal::update_conversion_widgets()
 586 {
 587         SignalBase::ConversionType conv_type = base_->get_conversion_type();
 588
 589         // Enable or disable widgets depending on conversion state
 590         conv_threshold_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 591         display_type_cb_->setEnabled(conv_type != SignalBase::NoConversion);
 592
 593         conv_threshold_cb_->clear();
 594
 595         vector < pair<QString, int> > presets = base_->get_conversion_presets();
 596
 597         // Prevent the combo box from firing the "edit text changed" signal
 598         // as that would involuntarily select the first entry
 599         conv_threshold_cb_->blockSignals(true);
 600
 601         // Set available options depending on chosen conversion
 602         for (pair<QString, int>& preset : presets)
 603                 conv_threshold_cb_->addItem(preset.first, preset.second);
 604
 605         map < QString, QVariant > options = base_->get_conversion_options();
 606
 607         if (conv_type == SignalBase::A2LConversionByThreshold) {
 608                 const vector<double> thresholds = base_->get_conversion_thresholds(
 609                                 SignalBase::A2LConversionByThreshold, true);
 610                 conv_threshold_cb_->addItem(
 611                                 QString("%1V").arg(QString::number(thresholds[0], 'f', 1)), -1);
 612         }
 613
 614         if (conv_type == SignalBase::A2LConversionBySchmittTrigger) {
 615                 const vector<double> thresholds = base_->get_conversion_thresholds(
 616                                 SignalBase::A2LConversionBySchmittTrigger, true);
 617                 conv_threshold_cb_->addItem(QString("%1V/%2V").arg(
 618                                 QString::number(thresholds[0], 'f', 1),
 619                                 QString::number(thresholds[1], 'f', 1)), -1);
 620         }
 621
 622         int preset_id = base_->get_current_conversion_preset();
 623         conv_threshold_cb_->setCurrentIndex(
 624                         conv_threshold_cb_->findData(preset_id));
 625
 626         conv_threshold_cb_->blockSignals(false);
 627 }
 628
 629 vector<data::LogicSegment::EdgePair> AnalogSignal::get_nearest_level_changes(uint64_t sample_pos)
 630 {
 631         assert(base_);
 632         assert(owner_);
 633
 634         // Return if there's no logic data or we're showing only the analog trace
 635         if (!base_->logic_data() || (display_type_ == DisplayAnalog))
 636                 return vector<data::LogicSegment::EdgePair>();
 637
 638         if (sample_pos == 0)
 639                 return vector<LogicSegment::EdgePair>();
 640
 641         shared_ptr<LogicSegment> segment = get_logic_segment_to_paint();
 642         if (!segment || (segment->get_sample_count() == 0))
 643                 return vector<LogicSegment::EdgePair>();
 644
 645         const View *view = owner_->view();
 646         assert(view);
 647         const double samples_per_pixel = base_->get_samplerate() * view->scale();
 648
 649         vector<LogicSegment::EdgePair> edges;
 650
 651         segment->get_surrounding_edges(edges, sample_pos,
 652                 samples_per_pixel / LogicSignal::Oversampling, 0);
 653
 654         if (edges.empty())
 655                 return vector<LogicSegment::EdgePair>();
 656
 657         return edges;
 658 }
 659
 660 void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 661 {
 662         const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
 663                 base_->analog_data()->analog_segments();
 664
 665         if (segments.empty())
 666                 return;
 667
 668         double min = 0, max = 0;
 669
 670         for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
 671                 pair<double, double> mm = segment->get_min_max();
 672                 min = std::min(min, mm.first);
 673                 max = std::max(max, mm.second);
 674         }
 675
 676         if ((min == signal_min_) && (max == signal_max_) && !force_update)
 677                 return;
 678
 679         signal_min_ = min;
 680         signal_max_ = max;
 681
 682         // If we're allowed to alter the div assignment...
 683         if (!keep_divs) {
 684                 // Use all divs for the positive range if there are no negative values
 685                 if ((min == 0) && (neg_vdivs_ > 0)) {
 686                         pos_vdivs_ += neg_vdivs_;
 687                         neg_vdivs_ = 0;
 688                 }
 689
 690                 // Split up the divs if there are negative values but no negative divs
 691                 if ((min < 0) && (neg_vdivs_ == 0)) {
 692                         neg_vdivs_ = pos_vdivs_ / 2;
 693                         pos_vdivs_ -= neg_vdivs_;
 694                 }
 695         }
 696
 697         // If there is still no positive div when we need it, add one
 698         // (this can happen when pos_vdivs==neg_vdivs==0)
 699         if ((max > 0) && (pos_vdivs_ == 0)) {
 700                 pos_vdivs_ = 1;
 701                 owner_->extents_changed(false, true);
 702         }
 703
 704         // If there is still no negative div when we need it, add one
 705         // (this can happen when pos_vdivs was 0 or 1 when trying to split)
 706         if ((min < 0) && (neg_vdivs_ == 0)) {
 707                 neg_vdivs_ = 1;
 708                 owner_->extents_changed(false, true);
 709         }
 710
 711         double min_value_per_div;
 712         if ((pos_vdivs_ > 0) && (neg_vdivs_ >  0))
 713                 min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_);
 714         else if (pos_vdivs_ > 0)
 715                 min_value_per_div = max / pos_vdivs_;
 716         else
 717                 min_value_per_div = -min / neg_vdivs_;
 718
 719         // Find first scale value that is bigger than the value we need
 720         for (int i = MinScaleIndex; i < MaxScaleIndex; i++)
 721                 if (get_resolution(i) > min_value_per_div) {
 722                         scale_index_ = i;
 723                         break;
 724                 }
 725
 726         update_scale();
 727 }
 728
 729 void AnalogSignal::reset_pixel_values()
 730 {
 731         value_at_pixel_pos_.clear();
 732         current_pixel_pos_ = -1;
 733         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 734 }
 735
 736 void AnalogSignal::process_next_sample_value(float x, float value)
 737 {
 738         // Note: NAN is used to indicate the non-existance of a value at this pixel
 739
 740         if (std::isnan(prev_value_at_pixel_)) {
 741                 if (x < 0) {
 742                         min_value_at_pixel_ = value;
 743                         max_value_at_pixel_ = value;
 744                         prev_value_at_pixel_ = value;
 745                         current_pixel_pos_ = x;
 746                 } else
 747                         prev_value_at_pixel_ = std::numeric_limits<float>::quiet_NaN();
 748         }
 749
 750         const int pixel_pos = (int)(x + 0.5);
 751
 752         if (pixel_pos > current_pixel_pos_) {
 753                 if (pixel_pos - current_pixel_pos_ == 1) {
 754                         if (std::isnan(prev_value_at_pixel_)) {
 755                                 value_at_pixel_pos_.push_back(prev_value_at_pixel_);
 756                         } else {
 757                                 // Average the min/max range to create one value for the previous pixel
 758                                 const float avg = (min_value_at_pixel_ + max_value_at_pixel_) / 2;
 759                                 value_at_pixel_pos_.push_back(avg);
 760                         }
 761                 } else {
 762                         // Interpolate values to create values for the intermediate pixels
 763                         const float start_value = prev_value_at_pixel_;
 764                         const float end_value = value;
 765                         const int steps = fabs(pixel_pos - current_pixel_pos_);
 766                         const double gradient = (end_value - start_value) / steps;
 767                         for (int i = 0; i < steps; i++) {
 768                                 if (current_pixel_pos_ + i < 0)
 769                                         continue;
 770                                 value_at_pixel_pos_.push_back(start_value + i * gradient);
 771                         }
 772                 }
 773
 774                 min_value_at_pixel_ = value;
 775                 max_value_at_pixel_ = value;
 776                 prev_value_at_pixel_ = value;
 777                 current_pixel_pos_ = pixel_pos;
 778         } else {
 779                 // Another sample for the same pixel
 780                 if (value < min_value_at_pixel_)
 781                         min_value_at_pixel_ = value;
 782                 if (value > max_value_at_pixel_)
 783                         max_value_at_pixel_ = value;
 784         }
 785 }
 786
 787 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
 788 {
 789         // Add the standard options
 790         Signal::populate_popup_form(parent, form);
 791
 792         // Add div-related settings
 793         pvdiv_sb_ = new QSpinBox(parent);
 794         pvdiv_sb_->setRange(0, MaximumVDivs);
 795         pvdiv_sb_->setValue(pos_vdivs_);
 796         connect(pvdiv_sb_, SIGNAL(valueChanged(int)),
 797                 this, SLOT(on_pos_vdivs_changed(int)));
 798         form->addRow(tr("Number of pos vertical divs"), pvdiv_sb_);
 799
 800         nvdiv_sb_ = new QSpinBox(parent);
 801         nvdiv_sb_->setRange(0, MaximumVDivs);
 802         nvdiv_sb_->setValue(neg_vdivs_);
 803         connect(nvdiv_sb_, SIGNAL(valueChanged(int)),
 804                 this, SLOT(on_neg_vdivs_changed(int)));
 805         form->addRow(tr("Number of neg vertical divs"), nvdiv_sb_);
 806
 807         div_height_sb_ = new QSpinBox(parent);
 808         div_height_sb_->setRange(20, 1000);
 809         div_height_sb_->setSingleStep(5);
 810         div_height_sb_->setSuffix(tr(" pixels"));
 811         div_height_sb_->setValue(div_height_);
 812         connect(div_height_sb_, SIGNAL(valueChanged(int)),
 813                 this, SLOT(on_div_height_changed(int)));
 814         form->addRow(tr("Div height"), div_height_sb_);
 815
 816         // Add the vertical resolution
 817         resolution_cb_ = new QComboBox(parent);
 818
 819         for (int i = MinScaleIndex; i < MaxScaleIndex; i++) {
 820                 const QString label = QString("%1").arg(get_resolution(i));
 821                 resolution_cb_->insertItem(0, label, QVariant(i));
 822         }
 823
 824         int cur_idx = resolution_cb_->findData(QVariant(scale_index_));
 825         resolution_cb_->setCurrentIndex(cur_idx);
 826
 827         connect(resolution_cb_, SIGNAL(currentIndexChanged(int)),
 828                 this, SLOT(on_resolution_changed(int)));
 829
 830         QGridLayout *const vdiv_layout = new QGridLayout;
 831         QLabel *const vdiv_unit = new QLabel(tr("V/div"));
 832         vdiv_layout->addWidget(resolution_cb_, 0, 0);
 833         vdiv_layout->addWidget(vdiv_unit, 0, 1);
 834
 835         form->addRow(tr("Vertical resolution"), vdiv_layout);
 836
 837         // Add the autoranging checkbox
 838         QCheckBox* autoranging_cb = new QCheckBox();
 839         autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked);
 840
 841         connect(autoranging_cb, SIGNAL(stateChanged(int)),
 842                 this, SLOT(on_autoranging_changed(int)));
 843
 844         form->addRow(tr("Autoranging"), autoranging_cb);
 845
 846         // Add the conversion type dropdown
 847         conversion_cb_ = new QComboBox();
 848
 849         conversion_cb_->addItem(tr("none"),
 850                 SignalBase::NoConversion);
 851         conversion_cb_->addItem(tr("to logic via threshold"),
 852                 SignalBase::A2LConversionByThreshold);
 853         conversion_cb_->addItem(tr("to logic via schmitt-trigger"),
 854                 SignalBase::A2LConversionBySchmittTrigger);
 855
 856         cur_idx = conversion_cb_->findData(QVariant(base_->get_conversion_type()));
 857         conversion_cb_->setCurrentIndex(cur_idx);
 858
 859         form->addRow(tr("Conversion"), conversion_cb_);
 860
 861         connect(conversion_cb_, SIGNAL(currentIndexChanged(int)),
 862                 this, SLOT(on_conversion_changed(int)));
 863
 864     // Add the conversion threshold settings
 865     conv_threshold_cb_ = new QComboBox();
 866     conv_threshold_cb_->setEditable(true);
 867
 868     form->addRow(tr("Conversion threshold(s)"), conv_threshold_cb_);
 869
 870     connect(conv_threshold_cb_, SIGNAL(currentIndexChanged(int)),
 871             this, SLOT(on_conv_threshold_changed(int)));
 872     connect(conv_threshold_cb_, SIGNAL(editTextChanged(const QString&)),
 873             this, SLOT(on_conv_threshold_changed()));  // index will be -1
 874
 875         // Add the display type dropdown
 876         display_type_cb_ = new QComboBox();
 877
 878         display_type_cb_->addItem(tr("analog"), DisplayAnalog);
 879         display_type_cb_->addItem(tr("converted"), DisplayConverted);
 880         display_type_cb_->addItem(tr("analog+converted"), DisplayBoth);
 881
 882         cur_idx = display_type_cb_->findData(QVariant(display_type_));
 883         display_type_cb_->setCurrentIndex(cur_idx);
 884
 885         form->addRow(tr("Show traces for"), display_type_cb_);
 886
 887         connect(display_type_cb_, SIGNAL(currentIndexChanged(int)),
 888                 this, SLOT(on_display_type_changed(int)));
 889
 890         // Update the conversion widget contents and states
 891         update_conversion_widgets();
 892 }
 893
 894 void AnalogSignal::hover_point_changed(const QPoint &hp)
 895 {
 896         Signal::hover_point_changed(hp);
 897
 898         // Note: Even though the view area begins at 0, we exclude 0 because
 899         // that's also the value given when the cursor is over the header to the
 900         // left of the trace paint area
 901         if (hp.x() <= 0) {
 902                 value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
 903         } else {
 904                 if ((size_t)hp.x() < value_at_pixel_pos_.size())
 905                         value_at_hover_pos_ = value_at_pixel_pos_.at(hp.x());
 906                 else
 907                         value_at_hover_pos_ = std::numeric_limits<float>::quiet_NaN();
 908         }
 909 }
 910
 911 void AnalogSignal::on_setting_changed(const QString &key, const QVariant &value)
 912 {
 913         Signal::on_setting_changed(key, value);
 914
 915         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 916                 show_sampling_points_ = value.toBool();
 917
 918         if (key == GlobalSettings::Key_View_FillSignalHighAreas)
 919                 fill_high_areas_ = value.toBool();
 920
 921         if (key == GlobalSettings::Key_View_FillSignalHighAreaColor)
 922                 high_fill_color_ = QColor::fromRgba(value.value<uint32_t>());
 923
 924         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 925                 show_analog_minor_grid_ = value.toBool();
 926
 927         if (key == GlobalSettings::Key_View_ConversionThresholdDispMode) {
 928                 conversion_threshold_disp_mode_ = value.toInt();
 929
 930                 if (owner_)
 931                         owner_->row_item_appearance_changed(false, true);
 932         }
 933 }
 934
 935 void AnalogSignal::on_min_max_changed(float min, float max)
 936 {
 937         if (autoranging_)
 938                 perform_autoranging(false, false);
 939         else {
 940                 if (min < signal_min_) signal_min_ = min;
 941                 if (max > signal_max_) signal_max_ = max;
 942         }
 943 }
 944
 945 void AnalogSignal::on_pos_vdivs_changed(int vdivs)
 946 {
 947         if (vdivs == pos_vdivs_)
 948                 return;
 949
 950         pos_vdivs_ = vdivs;
 951
 952         // There has to be at least one div, positive or negative
 953         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 954                 pos_vdivs_ = 1;
 955                 if (pvdiv_sb_)
 956                         pvdiv_sb_->setValue(pos_vdivs_);
 957         }
 958
 959         if (autoranging_) {
 960                 perform_autoranging(true, true);
 961
 962                 // It could be that a positive or negative div was added, so update
 963                 if (pvdiv_sb_) {
 964                         pvdiv_sb_->setValue(pos_vdivs_);
 965                         nvdiv_sb_->setValue(neg_vdivs_);
 966                 }
 967         }
 968
 969         update_logic_level_offsets();
 970
 971         if (owner_) {
 972                 // Call order is important, otherwise the lazy event handler won't work
 973                 owner_->extents_changed(false, true);
 974                 owner_->row_item_appearance_changed(false, true);
 975         }
 976 }
 977
 978 void AnalogSignal::on_neg_vdivs_changed(int vdivs)
 979 {
 980         if (vdivs == neg_vdivs_)
 981                 return;
 982
 983         neg_vdivs_ = vdivs;
 984
 985         // There has to be at least one div, positive or negative
 986         if ((neg_vdivs_ == 0) && (pos_vdivs_ == 0)) {
 987                 pos_vdivs_ = 1;
 988                 if (pvdiv_sb_)
 989                         pvdiv_sb_->setValue(pos_vdivs_);
 990         }
 991
 992         if (autoranging_) {
 993                 perform_autoranging(true, true);
 994
 995                 // It could be that a positive or negative div was added, so update
 996                 if (pvdiv_sb_) {
 997                         pvdiv_sb_->setValue(pos_vdivs_);
 998                         nvdiv_sb_->setValue(neg_vdivs_);
 999                 }
1000         }
1001
1002         update_logic_level_offsets();
1003
1004         if (owner_) {
1005                 // Call order is important, otherwise the lazy event handler won't work
1006                 owner_->extents_changed(false, true);
1007                 owner_->row_item_appearance_changed(false, true);
1008         }
1009 }
1010
1011 void AnalogSignal::on_div_height_changed(int height)
1012 {
1013         div_height_ = height;
1014         update_logic_level_offsets();
1015         update_scale();
1016
1017         if (owner_) {
1018                 // Call order is important, otherwise the lazy event handler won't work
1019                 owner_->extents_changed(false, true);
1020                 owner_->row_item_appearance_changed(false, true);
1021         }
1022 }
1023
1024 void AnalogSignal::on_resolution_changed(int index)
1025 {
1026         scale_index_ = resolution_cb_->itemData(index).toInt();
1027         update_scale();
1028
1029         if (owner_)
1030                 owner_->row_item_appearance_changed(false, true);
1031 }
1032
1033 void AnalogSignal::on_autoranging_changed(int state)
1034 {
1035         autoranging_ = (state == Qt::Checked);
1036
1037         if (autoranging_)
1038                 perform_autoranging(false, true);
1039
1040         if (owner_) {
1041                 // Call order is important, otherwise the lazy event handler won't work
1042                 owner_->extents_changed(false, true);
1043                 owner_->row_item_appearance_changed(false, true);
1044         }
1045 }
1046
1047 void AnalogSignal::on_conversion_changed(int index)
1048 {
1049         SignalBase::ConversionType old_conv_type = base_->get_conversion_type();
1050
1051         SignalBase::ConversionType conv_type =
1052                 (SignalBase::ConversionType)(conversion_cb_->itemData(index).toInt());
1053
1054         if (conv_type != old_conv_type) {
1055                 base_->set_conversion_type(conv_type);
1056                 update_conversion_widgets();
1057
1058                 if (owner_)
1059                         owner_->row_item_appearance_changed(false, true);
1060         }
1061 }
1062
1063 void AnalogSignal::on_conv_threshold_changed(int index)
1064 {
1065         SignalBase::ConversionType conv_type = base_->get_conversion_type();
1066
1067         // Note: index is set to -1 if the text in the combo box matches none of
1068         // the entries in the combo box
1069
1070         if ((index == -1) && (conv_threshold_cb_->currentText().length() == 0))
1071                 return;
1072
1073         // The combo box entry with the custom value has user_data set to -1
1074         const int user_data = conv_threshold_cb_->findText(
1075                         conv_threshold_cb_->currentText());
1076
1077         const bool use_custom_thr = (index == -1) || (user_data == -1);
1078
1079         if (conv_type == SignalBase::A2LConversionByThreshold && use_custom_thr) {
1080                 // Not one of the preset values, try to parse the combo box text
1081                 // Note: Regex loosely based on
1082                 // https://txt2re.com/index-c++.php3?s=0.1V&1&-13
1083                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1084                 QString re2 = "([a-zA-Z]*)"; // SI unit
1085                 QRegExp regex(re1 + re2);
1086
1087                 const QString text = conv_threshold_cb_->currentText();
1088                 if (!regex.exactMatch(text))
1089                         return;  // String doesn't match the regex
1090
1091                 QStringList tokens = regex.capturedTexts();
1092
1093                 // For now, we simply assume that the unit is volt without modifiers
1094                 const double thr = tokens.at(1).toDouble();
1095
1096                 // Only restart the conversion if the threshold was updated.
1097                 // We're starting a delayed conversion because the user may still be
1098                 // typing and the UI would lag if we kept on restarting it immediately
1099                 if (base_->set_conversion_option("threshold_value", thr))
1100                         base_->start_conversion(true);
1101         }
1102
1103         if (conv_type == SignalBase::A2LConversionBySchmittTrigger && use_custom_thr) {
1104                 // Not one of the preset values, try to parse the combo box text
1105                 // Note: Regex loosely based on
1106                 // https://txt2re.com/index-c++.php3?s=0.1V/0.2V&2&14&-22&3&15
1107                 QString re1 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1108                 QString re2 = "([a-zA-Z]*)"; // SI unit
1109                 QString re3 = "\\/"; // Forward slash, not captured
1110                 QString re4 = "([+-]?\\d*[\\.,]?\\d*)"; // Float value
1111                 QString re5 = "([a-zA-Z]*)"; // SI unit
1112                 QRegExp regex(re1 + re2 + re3 + re4 + re5);
1113
1114                 const QString text = conv_threshold_cb_->currentText();
1115                 if (!regex.exactMatch(text))
1116                         return;  // String doesn't match the regex
1117
1118                 QStringList tokens = regex.capturedTexts();
1119
1120                 // For now, we simply assume that the unit is volt without modifiers
1121                 const double low_thr = tokens.at(1).toDouble();
1122                 const double high_thr = tokens.at(3).toDouble();
1123
1124                 // Only restart the conversion if one of the options was updated.
1125                 // We're starting a delayed conversion because the user may still be
1126                 // typing and the UI would lag if we kept on restarting it immediately
1127                 bool o1 = base_->set_conversion_option("threshold_value_low", low_thr);
1128                 bool o2 = base_->set_conversion_option("threshold_value_high", high_thr);
1129                 if (o1 || o2)
1130                         base_->start_conversion(true);  // Start delayed conversion
1131         }
1132
1133         base_->set_conversion_preset((SignalBase::ConversionPreset)index);
1134
1135         // Immediately start the conversion if we're not using custom values
1136         // (i.e. we're using one of the presets)
1137         if (!use_custom_thr)
1138                 base_->start_conversion();
1139 }
1140
1141 void AnalogSignal::on_delayed_conversion_starter()
1142 {
1143         base_->start_conversion();
1144 }
1145
1146 void AnalogSignal::on_display_type_changed(int index)
1147 {
1148         display_type_ = (DisplayType)(display_type_cb_->itemData(index).toInt());
1149
1150         if (owner_)
1151                 owner_->row_item_appearance_changed(false, true);
1152 }
1153
1154 } // namespace trace
1155 } // namespace views
1156 } // namespace pv