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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 | ||
27 | #include <QApplication> | |
28 | #include <QCheckBox> | |
29 | #include <QComboBox> | |
30 | #include <QFormLayout> | |
31 | #include <QGridLayout> | |
32 | #include <QLabel> | |
33 | #include <QSpinBox> | |
34 | #include <QString> | |
35 | ||
36 | #include "analogsignal.hpp" | |
37 | #include "pv/data/analog.hpp" | |
38 | #include "pv/data/analogsegment.hpp" | |
39 | #include "pv/data/signalbase.hpp" | |
40 | #include "pv/view/view.hpp" | |
41 | #include "pv/globalsettings.hpp" | |
42 | ||
43 | #include <libsigrokcxx/libsigrokcxx.hpp> | |
44 | ||
45 | using std::max; | |
46 | using std::make_pair; | |
47 | using std::min; | |
48 | using std::shared_ptr; | |
49 | using std::deque; | |
50 | ||
51 | namespace pv { | |
52 | namespace views { | |
53 | namespace TraceView { | |
54 | ||
55 | const QColor AnalogSignal::SignalColours[4] = { | |
56 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
57 | QColor(0x87, 0x20, 0x7A), // Magenta | |
58 | QColor(0x20, 0x4A, 0x87), // Blue | |
59 | QColor(0x4E, 0x9A, 0x06) // Green | |
60 | }; | |
61 | ||
62 | const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100); | |
63 | const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100); | |
64 | ||
65 | const QColor AnalogSignal::SamplingPointColour(0x77, 0x77, 0x77); | |
66 | ||
67 | const float AnalogSignal::EnvelopeThreshold = 256.0f; | |
68 | ||
69 | const int AnalogSignal::MaximumVDivs = 10; | |
70 | const int AnalogSignal::MinScaleIndex = -6; | |
71 | const int AnalogSignal::MaxScaleIndex = 7; | |
72 | ||
73 | const int AnalogSignal::InfoTextMarginRight = 20; | |
74 | const int AnalogSignal::InfoTextMarginBottom = 5; | |
75 | ||
76 | AnalogSignal::AnalogSignal( | |
77 | pv::Session &session, | |
78 | shared_ptr<data::SignalBase> base) : | |
79 | Signal(session, base), | |
80 | scale_index_(4), // 20 per div | |
81 | scale_index_drag_offset_(0), | |
82 | div_height_(3 * QFontMetrics(QApplication::font()).height()), | |
83 | pos_vdivs_(1), | |
84 | neg_vdivs_(1), | |
85 | resolution_(0), | |
86 | autoranging_(true) | |
87 | { | |
88 | pv::data::Analog* analog_data = | |
89 | dynamic_cast<pv::data::Analog*>(data().get()); | |
90 | ||
91 | connect(analog_data, SIGNAL(samples_added(QObject*, uint64_t, uint64_t)), | |
92 | this, SLOT(on_samples_added())); | |
93 | ||
94 | base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]); | |
95 | update_scale(); | |
96 | } | |
97 | ||
98 | shared_ptr<pv::data::SignalData> AnalogSignal::data() const | |
99 | { | |
100 | return base_->analog_data(); | |
101 | } | |
102 | ||
103 | void AnalogSignal::save_settings(QSettings &settings) const | |
104 | { | |
105 | settings.setValue("pos_vdivs", pos_vdivs_); | |
106 | settings.setValue("neg_vdivs", neg_vdivs_); | |
107 | settings.setValue("scale_index", scale_index_); | |
108 | settings.setValue("autoranging", autoranging_); | |
109 | } | |
110 | ||
111 | void AnalogSignal::restore_settings(QSettings &settings) | |
112 | { | |
113 | if (settings.contains("pos_vdivs")) | |
114 | pos_vdivs_ = settings.value("pos_vdivs").toInt(); | |
115 | ||
116 | if (settings.contains("neg_vdivs")) | |
117 | neg_vdivs_ = settings.value("neg_vdivs").toInt(); | |
118 | ||
119 | if (settings.contains("scale_index")) { | |
120 | scale_index_ = settings.value("scale_index").toInt(); | |
121 | update_scale(); | |
122 | } | |
123 | ||
124 | if (settings.contains("autoranging")) | |
125 | autoranging_ = settings.value("autoranging").toBool(); | |
126 | } | |
127 | ||
128 | std::pair<int, int> AnalogSignal::v_extents() const | |
129 | { | |
130 | const int ph = pos_vdivs_ * div_height_; | |
131 | const int nh = neg_vdivs_ * div_height_; | |
132 | return make_pair(-ph, nh); | |
133 | } | |
134 | ||
135 | int AnalogSignal::scale_handle_offset() const | |
136 | { | |
137 | const int h = (pos_vdivs_ + neg_vdivs_) * div_height_; | |
138 | ||
139 | return ((scale_index_drag_offset_ - scale_index_) * | |
140 | h / 4) - h / 2; | |
141 | } | |
142 | ||
143 | void AnalogSignal::scale_handle_dragged(int offset) | |
144 | { | |
145 | const int h = (pos_vdivs_ + neg_vdivs_) * div_height_; | |
146 | ||
147 | scale_index_ = scale_index_drag_offset_ - | |
148 | (offset + h / 2) / (h / 4); | |
149 | ||
150 | update_scale(); | |
151 | } | |
152 | ||
153 | void AnalogSignal::scale_handle_drag_release() | |
154 | { | |
155 | scale_index_drag_offset_ = scale_index_; | |
156 | update_scale(); | |
157 | } | |
158 | ||
159 | void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp) | |
160 | { | |
161 | if (base_->enabled()) { | |
162 | Trace::paint_back(p, pp); | |
163 | paint_axis(p, pp, get_visual_y()); | |
164 | } | |
165 | } | |
166 | ||
167 | void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp) | |
168 | { | |
169 | assert(base_->analog_data()); | |
170 | assert(owner_); | |
171 | ||
172 | const int y = get_visual_y(); | |
173 | ||
174 | if (!base_->enabled()) | |
175 | return; | |
176 | ||
177 | paint_grid(p, y, pp.left(), pp.right()); | |
178 | ||
179 | const deque< shared_ptr<pv::data::AnalogSegment> > &segments = | |
180 | base_->analog_data()->analog_segments(); | |
181 | if (segments.empty()) | |
182 | return; | |
183 | ||
184 | const shared_ptr<pv::data::AnalogSegment> &segment = | |
185 | segments.front(); | |
186 | ||
187 | const double pixels_offset = pp.pixels_offset(); | |
188 | const double samplerate = max(1.0, segment->samplerate()); | |
189 | const pv::util::Timestamp& start_time = segment->start_time(); | |
190 | const int64_t last_sample = segment->get_sample_count() - 1; | |
191 | const double samples_per_pixel = samplerate * pp.scale(); | |
192 | const pv::util::Timestamp start = samplerate * (pp.offset() - start_time); | |
193 | const pv::util::Timestamp end = start + samples_per_pixel * pp.width(); | |
194 | ||
195 | const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(), | |
196 | (int64_t)0), last_sample); | |
197 | const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(), | |
198 | (int64_t)0), last_sample); | |
199 | ||
200 | if (samples_per_pixel < EnvelopeThreshold) | |
201 | paint_trace(p, segment, y, pp.left(), | |
202 | start_sample, end_sample, | |
203 | pixels_offset, samples_per_pixel); | |
204 | else | |
205 | paint_envelope(p, segment, y, pp.left(), | |
206 | start_sample, end_sample, | |
207 | pixels_offset, samples_per_pixel); | |
208 | } | |
209 | ||
210 | void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp) | |
211 | { | |
212 | if (!enabled()) | |
213 | return; | |
214 | ||
215 | const int y = get_visual_y(); | |
216 | ||
217 | // Show the info section on the right side of the trace | |
218 | const QString infotext = QString("%1 V/div").arg(resolution_); | |
219 | ||
220 | p.setPen(base_->colour()); | |
221 | p.setFont(QApplication::font()); | |
222 | ||
223 | const QRectF bounding_rect = QRectF(pp.left(), | |
224 | y + v_extents().first, | |
225 | pp.width() - InfoTextMarginRight, | |
226 | v_extents().second - v_extents().first - InfoTextMarginBottom); | |
227 | ||
228 | p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext); | |
229 | } | |
230 | ||
231 | void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right) | |
232 | { | |
233 | p.setRenderHint(QPainter::Antialiasing, false); | |
234 | ||
235 | if (pos_vdivs_ > 0) { | |
236 | p.setPen(QPen(GridMajorColor, 1, Qt::DashLine)); | |
237 | for (int i = 1; i <= pos_vdivs_; i++) { | |
238 | const float dy = i * div_height_; | |
239 | p.drawLine(QLineF(left, y - dy, right, y - dy)); | |
240 | } | |
241 | ||
242 | p.setPen(QPen(GridMinorColor, 1, Qt::DashLine)); | |
243 | for (int i = 0; i < pos_vdivs_; i++) { | |
244 | const float dy = i * div_height_; | |
245 | const float dy25 = dy + (0.25 * div_height_); | |
246 | const float dy50 = dy + (0.50 * div_height_); | |
247 | const float dy75 = dy + (0.75 * div_height_); | |
248 | p.drawLine(QLineF(left, y - dy25, right, y - dy25)); | |
249 | p.drawLine(QLineF(left, y - dy50, right, y - dy50)); | |
250 | p.drawLine(QLineF(left, y - dy75, right, y - dy75)); | |
251 | } | |
252 | } | |
253 | ||
254 | if (neg_vdivs_ > 0) { | |
255 | p.setPen(QPen(GridMajorColor, 1, Qt::DashLine)); | |
256 | for (int i = 1; i <= neg_vdivs_; i++) { | |
257 | const float dy = i * div_height_; | |
258 | p.drawLine(QLineF(left, y + dy, right, y + dy)); | |
259 | } | |
260 | ||
261 | p.setPen(QPen(GridMinorColor, 1, Qt::DashLine)); | |
262 | for (int i = 0; i < neg_vdivs_; i++) { | |
263 | const float dy = i * div_height_; | |
264 | const float dy25 = dy + (0.25 * div_height_); | |
265 | const float dy50 = dy + (0.50 * div_height_); | |
266 | const float dy75 = dy + (0.75 * div_height_); | |
267 | p.drawLine(QLineF(left, y + dy25, right, y + dy25)); | |
268 | p.drawLine(QLineF(left, y + dy50, right, y + dy50)); | |
269 | p.drawLine(QLineF(left, y + dy75, right, y + dy75)); | |
270 | } | |
271 | } | |
272 | ||
273 | p.setRenderHint(QPainter::Antialiasing, true); | |
274 | } | |
275 | ||
276 | void AnalogSignal::paint_trace(QPainter &p, | |
277 | const shared_ptr<pv::data::AnalogSegment> &segment, | |
278 | int y, int left, const int64_t start, const int64_t end, | |
279 | const double pixels_offset, const double samples_per_pixel) | |
280 | { | |
281 | p.setPen(base_->colour()); | |
282 | ||
283 | const int64_t points_count = end - start; | |
284 | ||
285 | QPointF *points = new QPointF[points_count]; | |
286 | QPointF *point = points; | |
287 | ||
288 | QRectF *const sampling_points = new QRectF[points_count]; | |
289 | QRectF *sampling_point = sampling_points; | |
290 | ||
291 | pv::data::SegmentAnalogDataIterator* it = | |
292 | segment->begin_sample_iteration(start); | |
293 | ||
294 | const int w = 2; | |
295 | for (int64_t sample = start; sample != end; sample++) { | |
296 | const float x = (sample / samples_per_pixel - | |
297 | pixels_offset) + left; | |
298 | ||
299 | *point++ = QPointF(x, y - *((float*)it->value) * scale_); | |
300 | *sampling_point++ = QRectF(x - (w / 2), y - *((float*)it->value) * scale_ - (w / 2), w, w); | |
301 | ||
302 | segment->continue_sample_iteration(it, 1); | |
303 | } | |
304 | segment->end_sample_iteration(it); | |
305 | ||
306 | p.drawPolyline(points, points_count); | |
307 | ||
308 | // Paint the sampling points if enabled | |
309 | GlobalSettings settings; | |
310 | const bool show_sampling_points = | |
311 | settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool(); | |
312 | ||
313 | if (show_sampling_points && (samples_per_pixel < 0.25)) { | |
314 | p.setPen(SamplingPointColour); | |
315 | p.drawRects(sampling_points, points_count); | |
316 | } | |
317 | ||
318 | delete[] points; | |
319 | delete[] sampling_points; | |
320 | } | |
321 | ||
322 | void AnalogSignal::paint_envelope(QPainter &p, | |
323 | const shared_ptr<pv::data::AnalogSegment> &segment, | |
324 | int y, int left, const int64_t start, const int64_t end, | |
325 | const double pixels_offset, const double samples_per_pixel) | |
326 | { | |
327 | using pv::data::AnalogSegment; | |
328 | ||
329 | AnalogSegment::EnvelopeSection e; | |
330 | segment->get_envelope_section(e, start, end, samples_per_pixel); | |
331 | ||
332 | if (e.length < 2) | |
333 | return; | |
334 | ||
335 | p.setPen(QPen(Qt::NoPen)); | |
336 | p.setBrush(base_->colour()); | |
337 | ||
338 | QRectF *const rects = new QRectF[e.length]; | |
339 | QRectF *rect = rects; | |
340 | ||
341 | for (uint64_t sample = 0; sample < e.length-1; sample++) { | |
342 | const float x = ((e.scale * sample + e.start) / | |
343 | samples_per_pixel - pixels_offset) + left; | |
344 | const AnalogSegment::EnvelopeSample *const s = | |
345 | e.samples + sample; | |
346 | ||
347 | // We overlap this sample with the next so that vertical | |
348 | // gaps do not appear during steep rising or falling edges | |
349 | const float b = y - max(s->max, (s+1)->min) * scale_; | |
350 | const float t = y - min(s->min, (s+1)->max) * scale_; | |
351 | ||
352 | float h = b - t; | |
353 | if (h >= 0.0f && h <= 1.0f) | |
354 | h = 1.0f; | |
355 | if (h <= 0.0f && h >= -1.0f) | |
356 | h = -1.0f; | |
357 | ||
358 | *rect++ = QRectF(x, t, 1.0f, h); | |
359 | } | |
360 | ||
361 | p.drawRects(rects, e.length); | |
362 | ||
363 | delete[] rects; | |
364 | delete[] e.samples; | |
365 | } | |
366 | ||
367 | float AnalogSignal::get_resolution(int scale_index) | |
368 | { | |
369 | const float seq[] = {1.0f, 2.0f, 5.0f}; | |
370 | ||
371 | const int offset = std::numeric_limits<int>::max() / (2 * countof(seq)); | |
372 | const std::div_t d = std::div( | |
373 | (int)(scale_index + countof(seq) * offset), | |
374 | countof(seq)); | |
375 | ||
376 | return powf(10.0f, d.quot - offset) * seq[d.rem]; | |
377 | } | |
378 | ||
379 | void AnalogSignal::update_scale() | |
380 | { | |
381 | resolution_ = get_resolution(scale_index_); | |
382 | scale_ = div_height_ / resolution_; | |
383 | } | |
384 | ||
385 | void AnalogSignal::perform_autoranging(bool force_update) | |
386 | { | |
387 | const deque< shared_ptr<pv::data::AnalogSegment> > &segments = | |
388 | base_->analog_data()->analog_segments(); | |
389 | ||
390 | if (segments.empty()) | |
391 | return; | |
392 | ||
393 | static double prev_min = 0, prev_max = 0; | |
394 | double min = 0, max = 0; | |
395 | ||
396 | for (shared_ptr<pv::data::AnalogSegment> segment : segments) { | |
397 | std::pair<double, double> mm = segment->get_min_max(); | |
398 | min = std::min(min, mm.first); | |
399 | max = std::max(max, mm.second); | |
400 | } | |
401 | ||
402 | if ((min == prev_min) && (max == prev_max) && !force_update) | |
403 | return; | |
404 | ||
405 | prev_min = min; | |
406 | prev_max = max; | |
407 | ||
408 | // Use all divs for the positive range if there are no negative values | |
409 | if ((min == 0) && (neg_vdivs_ > 0)) { | |
410 | pos_vdivs_ += neg_vdivs_; | |
411 | neg_vdivs_ = 0; | |
412 | } | |
413 | ||
414 | // Split up the divs if there are negative values but no negative divs | |
415 | if ((min < 0) && (neg_vdivs_ == 0)) { | |
416 | neg_vdivs_ = pos_vdivs_ / 2; | |
417 | pos_vdivs_ -= neg_vdivs_; | |
418 | } | |
419 | ||
420 | double min_value_per_div; | |
421 | if ((pos_vdivs_ > 0) && (neg_vdivs_ > 0)) | |
422 | min_value_per_div = std::max(max / pos_vdivs_, -min / neg_vdivs_); | |
423 | else if (pos_vdivs_ > 0) | |
424 | min_value_per_div = max / pos_vdivs_; | |
425 | else | |
426 | min_value_per_div = -min / neg_vdivs_; | |
427 | ||
428 | // Find first scale value that is bigger than the value we need | |
429 | for (int i = MinScaleIndex; i < MaxScaleIndex; i++) | |
430 | if (get_resolution(i) > min_value_per_div) { | |
431 | scale_index_ = i; | |
432 | break; | |
433 | } | |
434 | ||
435 | update_scale(); | |
436 | } | |
437 | ||
438 | void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form) | |
439 | { | |
440 | // Add the standard options | |
441 | Signal::populate_popup_form(parent, form); | |
442 | ||
443 | QFormLayout *const layout = new QFormLayout; | |
444 | ||
445 | // Add the number of vdivs | |
446 | QSpinBox *pvdiv_sb = new QSpinBox(parent); | |
447 | pvdiv_sb->setRange(0, MaximumVDivs); | |
448 | pvdiv_sb->setValue(pos_vdivs_); | |
449 | connect(pvdiv_sb, SIGNAL(valueChanged(int)), | |
450 | this, SLOT(on_pos_vdivs_changed(int))); | |
451 | layout->addRow(tr("Number of pos vertical divs"), pvdiv_sb); | |
452 | ||
453 | QSpinBox *nvdiv_sb = new QSpinBox(parent); | |
454 | nvdiv_sb->setRange(0, MaximumVDivs); | |
455 | nvdiv_sb->setValue(neg_vdivs_); | |
456 | connect(nvdiv_sb, SIGNAL(valueChanged(int)), | |
457 | this, SLOT(on_neg_vdivs_changed(int))); | |
458 | layout->addRow(tr("Number of neg vertical divs"), nvdiv_sb); | |
459 | ||
460 | // Add the vertical resolution | |
461 | resolution_cb_ = new QComboBox(parent); | |
462 | ||
463 | for (int i = MinScaleIndex; i < MaxScaleIndex; i++) { | |
464 | const QString label = QString("%1").arg(get_resolution(i)); | |
465 | resolution_cb_->insertItem(0, label, QVariant(i)); | |
466 | } | |
467 | ||
468 | const int cur_idx = resolution_cb_->findData(QVariant(scale_index_)); | |
469 | resolution_cb_->setCurrentIndex(cur_idx); | |
470 | ||
471 | connect(resolution_cb_, SIGNAL(currentIndexChanged(int)), | |
472 | this, SLOT(on_resolution_changed(int))); | |
473 | ||
474 | QGridLayout *const vdiv_layout = new QGridLayout; | |
475 | QLabel *const vdiv_unit = new QLabel(tr("V/div")); | |
476 | vdiv_layout->addWidget(resolution_cb_, 0, 0); | |
477 | vdiv_layout->addWidget(vdiv_unit, 0, 1); | |
478 | ||
479 | layout->addRow(tr("Vertical resolution"), vdiv_layout); | |
480 | ||
481 | // Add the autoranging checkbox | |
482 | QCheckBox* autoranging_cb = new QCheckBox(); | |
483 | autoranging_cb->setCheckState(autoranging_ ? Qt::Checked : Qt::Unchecked); | |
484 | ||
485 | connect(autoranging_cb, SIGNAL(stateChanged(int)), | |
486 | this, SLOT(on_autoranging_changed(int))); | |
487 | ||
488 | layout->addRow(tr("Autoranging"), autoranging_cb); | |
489 | ||
490 | form->addRow(layout); | |
491 | } | |
492 | ||
493 | void AnalogSignal::on_samples_added() | |
494 | { | |
495 | perform_autoranging(); | |
496 | ||
497 | if (owner_) { | |
498 | // Call order is important, otherwise the lazy event handler won't work | |
499 | owner_->extents_changed(false, true); | |
500 | owner_->row_item_appearance_changed(false, true); | |
501 | } | |
502 | } | |
503 | ||
504 | void AnalogSignal::on_pos_vdivs_changed(int vdivs) | |
505 | { | |
506 | pos_vdivs_ = vdivs; | |
507 | ||
508 | if (autoranging_) | |
509 | perform_autoranging(true); | |
510 | ||
511 | if (owner_) { | |
512 | // Call order is important, otherwise the lazy event handler won't work | |
513 | owner_->extents_changed(false, true); | |
514 | owner_->row_item_appearance_changed(false, true); | |
515 | } | |
516 | } | |
517 | ||
518 | void AnalogSignal::on_neg_vdivs_changed(int vdivs) | |
519 | { | |
520 | neg_vdivs_ = vdivs; | |
521 | ||
522 | if (autoranging_) | |
523 | perform_autoranging(true); | |
524 | ||
525 | if (owner_) { | |
526 | // Call order is important, otherwise the lazy event handler won't work | |
527 | owner_->extents_changed(false, true); | |
528 | owner_->row_item_appearance_changed(false, true); | |
529 | } | |
530 | } | |
531 | ||
532 | void AnalogSignal::on_resolution_changed(int index) | |
533 | { | |
534 | scale_index_ = resolution_cb_->itemData(index).toInt(); | |
535 | update_scale(); | |
536 | ||
537 | if (owner_) | |
538 | owner_->row_item_appearance_changed(false, true); | |
539 | } | |
540 | ||
541 | void AnalogSignal::on_autoranging_changed(int state) | |
542 | { | |
543 | autoranging_ = (state == Qt::Checked); | |
544 | ||
545 | if (autoranging_) | |
546 | perform_autoranging(true); | |
547 | ||
548 | if (owner_) { | |
549 | // Call order is important, otherwise the lazy event handler won't work | |
550 | owner_->extents_changed(false, true); | |
551 | owner_->row_item_appearance_changed(false, true); | |
552 | } | |
553 | } | |
554 | ||
555 | } // namespace TraceView | |
556 | } // namespace views | |
557 | } // namespace pv |