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