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