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aba1dd16 JH |
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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <extdef.h> | |
22 | ||
3b68d03d JH |
23 | #include <cassert> |
24 | #include <cmath> | |
8a2fafcc JH |
25 | #include <cstdlib> |
26 | #include <limits> | |
aba1dd16 | 27 | |
37b9fed4 | 28 | #include <QApplication> |
4cffac16 SA |
29 | #include <QFormLayout> |
30 | #include <QSpinBox> | |
37b9fed4 | 31 | |
2acdb232 JH |
32 | #include "analogsignal.hpp" |
33 | #include "pv/data/analog.hpp" | |
f3d66e52 | 34 | #include "pv/data/analogsegment.hpp" |
2acdb232 | 35 | #include "pv/view/view.hpp" |
aba1dd16 | 36 | |
fe3a1c21 | 37 | #include <libsigrokcxx/libsigrokcxx.hpp> |
e8d00928 | 38 | |
819f4c25 | 39 | using std::max; |
a5d93c27 | 40 | using std::make_pair; |
819f4c25 | 41 | using std::min; |
f9abf97e | 42 | using std::shared_ptr; |
819f4c25 | 43 | using std::deque; |
aba1dd16 | 44 | |
e8d00928 ML |
45 | using sigrok::Channel; |
46 | ||
aba1dd16 JH |
47 | namespace pv { |
48 | namespace view { | |
49 | ||
568b90d4 JH |
50 | const QColor AnalogSignal::SignalColours[4] = { |
51 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
52 | QColor(0x87, 0x20, 0x7A), // Magenta | |
53 | QColor(0x20, 0x4A, 0x87), // Blue | |
54 | QColor(0x4E, 0x9A, 0x06) // Green | |
55 | }; | |
56 | ||
37b9fed4 SA |
57 | const QColor AnalogSignal::GridMajorColor = QColor(0xB0, 0xB0, 0xB0); |
58 | const QColor AnalogSignal::GridMinorColor = QColor(0xD0, 0xD0, 0xD0); | |
59 | ||
7c68ddae JH |
60 | const float AnalogSignal::EnvelopeThreshold = 256.0f; |
61 | ||
4cffac16 SA |
62 | const int AnalogSignal::MaximumVDivs = 10; |
63 | ||
b86aa8f4 | 64 | AnalogSignal::AnalogSignal( |
2b81ae46 | 65 | pv::Session &session, |
b86aa8f4 | 66 | shared_ptr<Channel> channel, |
e8d00928 | 67 | shared_ptr<data::Analog> data) : |
b86aa8f4 | 68 | Signal(session, channel), |
8dbbc7f0 | 69 | data_(data), |
834a4f1b | 70 | scale_index_(4), // 20 per div |
37b9fed4 SA |
71 | scale_index_drag_offset_(0), |
72 | div_height_(3 * QFontMetrics(QApplication::font()).height()), | |
834a4f1b SA |
73 | vdivs_(1), |
74 | resolution_(0) | |
aba1dd16 | 75 | { |
99af6802 | 76 | set_colour(SignalColours[channel_->index() % countof(SignalColours)]); |
834a4f1b | 77 | update_scale(); |
aba1dd16 JH |
78 | } |
79 | ||
3009b5b3 JH |
80 | shared_ptr<pv::data::SignalData> AnalogSignal::data() const |
81 | { | |
8dbbc7f0 | 82 | return data_; |
3009b5b3 JH |
83 | } |
84 | ||
85 | shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const | |
9a0cd293 | 86 | { |
8dbbc7f0 | 87 | return data_; |
9a0cd293 JH |
88 | } |
89 | ||
a5d93c27 JH |
90 | std::pair<int, int> AnalogSignal::v_extents() const |
91 | { | |
37b9fed4 | 92 | const int h = vdivs_ * div_height_; |
8a2fafcc | 93 | return make_pair(-h, h); |
a5d93c27 JH |
94 | } |
95 | ||
214470fc JH |
96 | int AnalogSignal::scale_handle_offset() const |
97 | { | |
37b9fed4 SA |
98 | const int h = vdivs_ * div_height_; |
99 | ||
8a2fafcc | 100 | return ((scale_index_drag_offset_ - scale_index_) * |
37b9fed4 | 101 | h / 4) - h / 2; |
214470fc JH |
102 | } |
103 | ||
104 | void AnalogSignal::scale_handle_dragged(int offset) | |
105 | { | |
37b9fed4 SA |
106 | const int h = vdivs_ * div_height_; |
107 | ||
8a2fafcc | 108 | scale_index_ = scale_index_drag_offset_ - |
37b9fed4 | 109 | (offset + h / 2) / (h / 4); |
834a4f1b SA |
110 | |
111 | update_scale(); | |
8a2fafcc JH |
112 | } |
113 | ||
114 | void AnalogSignal::scale_handle_drag_release() | |
115 | { | |
116 | scale_index_drag_offset_ = scale_index_; | |
834a4f1b | 117 | update_scale(); |
214470fc JH |
118 | } |
119 | ||
5b5fa4da | 120 | void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp) |
fe08b6e8 | 121 | { |
99af6802 SA |
122 | if (channel_->enabled()) { |
123 | Trace::paint_back(p, pp); | |
97904bf7 | 124 | paint_axis(p, pp, get_visual_y()); |
99af6802 | 125 | } |
fe08b6e8 JH |
126 | } |
127 | ||
5b5fa4da | 128 | void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp) |
aba1dd16 | 129 | { |
8dbbc7f0 | 130 | assert(data_); |
8dbbc7f0 | 131 | assert(owner_); |
a8acb46e | 132 | |
be9e7b4b | 133 | const int y = get_visual_y(); |
01fd3263 | 134 | |
8dbbc7f0 | 135 | if (!channel_->enabled()) |
cec48d16 JH |
136 | return; |
137 | ||
37b9fed4 SA |
138 | paint_grid(p, y, pp.left(), pp.right()); |
139 | ||
f3d66e52 JH |
140 | const deque< shared_ptr<pv::data::AnalogSegment> > &segments = |
141 | data_->analog_segments(); | |
142 | if (segments.empty()) | |
a8acb46e JH |
143 | return; |
144 | ||
f3d66e52 JH |
145 | const shared_ptr<pv::data::AnalogSegment> &segment = |
146 | segments.front(); | |
a8acb46e | 147 | |
4c8a6a6d | 148 | const double pixels_offset = pp.pixels_offset(); |
69e33a1b | 149 | const double samplerate = max(1.0, segment->samplerate()); |
60d9b99a | 150 | const pv::util::Timestamp& start_time = segment->start_time(); |
f3d66e52 | 151 | const int64_t last_sample = segment->get_sample_count() - 1; |
4c8a6a6d | 152 | const double samples_per_pixel = samplerate * pp.scale(); |
60d9b99a JS |
153 | const pv::util::Timestamp start = samplerate * (pp.offset() - start_time); |
154 | const pv::util::Timestamp end = start + samples_per_pixel * pp.width(); | |
a8acb46e | 155 | |
60d9b99a | 156 | const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(), |
a8acb46e | 157 | (int64_t)0), last_sample); |
60d9b99a | 158 | const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(), |
a8acb46e JH |
159 | (int64_t)0), last_sample); |
160 | ||
7c68ddae | 161 | if (samples_per_pixel < EnvelopeThreshold) |
f3d66e52 | 162 | paint_trace(p, segment, y, pp.left(), |
7c68ddae JH |
163 | start_sample, end_sample, |
164 | pixels_offset, samples_per_pixel); | |
165 | else | |
f3d66e52 | 166 | paint_envelope(p, segment, y, pp.left(), |
7c68ddae JH |
167 | start_sample, end_sample, |
168 | pixels_offset, samples_per_pixel); | |
169 | } | |
170 | ||
37b9fed4 SA |
171 | void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right) |
172 | { | |
173 | p.setPen(QPen(GridMajorColor, 0.5, Qt::DashLine)); | |
174 | for (int i = 1; i <= vdivs_; i++) { | |
175 | const int dy = i * div_height_; | |
176 | p.drawLine(QLineF(left, y - dy, right, y - dy)); | |
177 | p.drawLine(QLineF(left, y + dy, right, y + dy)); | |
178 | } | |
179 | ||
180 | p.setPen(QPen(GridMinorColor, 0.5, Qt::DashLine)); | |
181 | for (int i = 0; i < vdivs_; i++) { | |
182 | const int dy = i * div_height_; | |
183 | const float dy25 = dy + (0.25 * div_height_); | |
184 | const float dy50 = dy + (0.50 * div_height_); | |
185 | const float dy75 = dy + (0.75 * div_height_); | |
186 | p.drawLine(QLineF(left, y - dy25, right, y - dy25)); | |
187 | p.drawLine(QLineF(left, y + dy25, right, y + dy25)); | |
188 | p.drawLine(QLineF(left, y - dy50, right, y - dy50)); | |
189 | p.drawLine(QLineF(left, y + dy50, right, y + dy50)); | |
190 | p.drawLine(QLineF(left, y - dy75, right, y - dy75)); | |
191 | p.drawLine(QLineF(left, y + dy75, right, y + dy75)); | |
192 | } | |
193 | } | |
194 | ||
7c68ddae | 195 | void AnalogSignal::paint_trace(QPainter &p, |
f3d66e52 | 196 | const shared_ptr<pv::data::AnalogSegment> &segment, |
7c68ddae JH |
197 | int y, int left, const int64_t start, const int64_t end, |
198 | const double pixels_offset, const double samples_per_pixel) | |
199 | { | |
200 | const int64_t sample_count = end - start; | |
201 | ||
f3d66e52 | 202 | const float *const samples = segment->get_samples(start, end); |
a8acb46e JH |
203 | assert(samples); |
204 | ||
8dbbc7f0 | 205 | p.setPen(colour_); |
7c68ddae | 206 | |
d3758367 | 207 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
208 | QPointF *point = points; |
209 | ||
7c68ddae | 210 | for (int64_t sample = start; sample != end; sample++) { |
a8acb46e | 211 | const float x = (sample / samples_per_pixel - |
2658961b | 212 | pixels_offset) + left; |
d3758367 | 213 | *point++ = QPointF(x, |
834a4f1b | 214 | y - samples[sample - start] * scale_); |
a8acb46e JH |
215 | } |
216 | ||
306d43a7 | 217 | p.drawPolyline(points, point - points); |
a8acb46e | 218 | |
7c68ddae | 219 | delete[] samples; |
a8acb46e | 220 | delete[] points; |
aba1dd16 JH |
221 | } |
222 | ||
7c68ddae | 223 | void AnalogSignal::paint_envelope(QPainter &p, |
f3d66e52 | 224 | const shared_ptr<pv::data::AnalogSegment> &segment, |
7c68ddae JH |
225 | int y, int left, const int64_t start, const int64_t end, |
226 | const double pixels_offset, const double samples_per_pixel) | |
227 | { | |
f3d66e52 | 228 | using pv::data::AnalogSegment; |
7c68ddae | 229 | |
f3d66e52 JH |
230 | AnalogSegment::EnvelopeSection e; |
231 | segment->get_envelope_section(e, start, end, samples_per_pixel); | |
7c68ddae JH |
232 | |
233 | if (e.length < 2) | |
234 | return; | |
235 | ||
819f4c25 | 236 | p.setPen(QPen(Qt::NoPen)); |
8dbbc7f0 | 237 | p.setBrush(colour_); |
7c68ddae JH |
238 | |
239 | QRectF *const rects = new QRectF[e.length]; | |
240 | QRectF *rect = rects; | |
241 | ||
f3290553 | 242 | for (uint64_t sample = 0; sample < e.length-1; sample++) { |
7c68ddae JH |
243 | const float x = ((e.scale * sample + e.start) / |
244 | samples_per_pixel - pixels_offset) + left; | |
f3d66e52 | 245 | const AnalogSegment::EnvelopeSample *const s = |
7c68ddae JH |
246 | e.samples + sample; |
247 | ||
248 | // We overlap this sample with the next so that vertical | |
249 | // gaps do not appear during steep rising or falling edges | |
834a4f1b SA |
250 | const float b = y - max(s->max, (s+1)->min) * scale_; |
251 | const float t = y - min(s->min, (s+1)->max) * scale_; | |
7c68ddae JH |
252 | |
253 | float h = b - t; | |
f3290553 | 254 | if (h >= 0.0f && h <= 1.0f) |
7c68ddae | 255 | h = 1.0f; |
f3290553 | 256 | if (h <= 0.0f && h >= -1.0f) |
7c68ddae JH |
257 | h = -1.0f; |
258 | ||
259 | *rect++ = QRectF(x, t, 1.0f, h); | |
260 | } | |
261 | ||
262 | p.drawRects(rects, e.length); | |
263 | ||
264 | delete[] rects; | |
265 | delete[] e.samples; | |
266 | } | |
267 | ||
834a4f1b | 268 | void AnalogSignal::update_scale() |
8a2fafcc JH |
269 | { |
270 | const float seq[] = {1.0f, 2.0f, 5.0f}; | |
834a4f1b | 271 | |
8a2fafcc JH |
272 | const int offset = std::numeric_limits<int>::max() / (2 * countof(seq)); |
273 | const std::div_t d = std::div( | |
274 | (int)(scale_index_ + countof(seq) * offset), | |
275 | countof(seq)); | |
834a4f1b SA |
276 | |
277 | resolution_ = powf(10.0f, d.quot - offset) * seq[d.rem]; | |
278 | scale_ = div_height_ / resolution_; | |
8a2fafcc JH |
279 | } |
280 | ||
4cffac16 SA |
281 | void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form) |
282 | { | |
283 | // Add the standard options | |
284 | Signal::populate_popup_form(parent, form); | |
285 | ||
286 | // Add the vdiv settings | |
287 | QSpinBox *vdiv_sb = new QSpinBox(parent); | |
288 | vdiv_sb->setRange(1, MaximumVDivs); | |
289 | vdiv_sb->setValue(vdivs_); | |
290 | connect(vdiv_sb, SIGNAL(valueChanged(int)), | |
291 | this, SLOT(on_vdivs_changed(int))); | |
292 | form->addRow(tr("Number of vertical divs"), vdiv_sb); | |
293 | } | |
294 | ||
295 | void AnalogSignal::on_vdivs_changed(int vdivs) | |
296 | { | |
297 | vdivs_ = vdivs; | |
298 | ||
299 | if (owner_) | |
300 | owner_->extents_changed(false, true); | |
301 | } | |
302 | ||
303 | ||
aba1dd16 JH |
304 | } // namespace view |
305 | } // namespace pv |