2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
28 #include <QApplication>
29 #include <QFormLayout>
32 #include "analogsignal.hpp"
33 #include "pv/data/analog.hpp"
34 #include "pv/data/analogsegment.hpp"
35 #include "pv/view/view.hpp"
37 #include <libsigrokcxx/libsigrokcxx.hpp>
42 using std::shared_ptr;
45 using sigrok::Channel;
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
57 const QColor AnalogSignal::GridMajorColor = QColor(0xB0, 0xB0, 0xB0);
58 const QColor AnalogSignal::GridMinorColor = QColor(0xD0, 0xD0, 0xD0);
60 const float AnalogSignal::EnvelopeThreshold = 256.0f;
62 const int AnalogSignal::MaximumVDivs = 10;
64 AnalogSignal::AnalogSignal(
66 shared_ptr<Channel> channel,
67 shared_ptr<data::Analog> data) :
68 Signal(session, channel),
70 scale_index_(4), // 20 per div
71 scale_index_drag_offset_(0),
72 div_height_(3 * QFontMetrics(QApplication::font()).height()),
76 set_colour(SignalColours[channel_->index() % countof(SignalColours)]);
80 shared_ptr<pv::data::SignalData> AnalogSignal::data() const
85 shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const
90 std::pair<int, int> AnalogSignal::v_extents() const
92 const int h = vdivs_ * div_height_;
93 return make_pair(-h, h);
96 int AnalogSignal::scale_handle_offset() const
98 const int h = vdivs_ * div_height_;
100 return ((scale_index_drag_offset_ - scale_index_) *
104 void AnalogSignal::scale_handle_dragged(int offset)
106 const int h = vdivs_ * div_height_;
108 scale_index_ = scale_index_drag_offset_ -
109 (offset + h / 2) / (h / 4);
114 void AnalogSignal::scale_handle_drag_release()
116 scale_index_drag_offset_ = scale_index_;
120 void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp)
122 if (channel_->enabled()) {
123 Trace::paint_back(p, pp);
124 paint_axis(p, pp, get_visual_y());
128 void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp)
133 const int y = get_visual_y();
135 if (!channel_->enabled())
138 paint_grid(p, y, pp.left(), pp.right());
140 const deque< shared_ptr<pv::data::AnalogSegment> > &segments =
141 data_->analog_segments();
142 if (segments.empty())
145 const shared_ptr<pv::data::AnalogSegment> &segment =
148 const double pixels_offset = pp.pixels_offset();
149 const double samplerate = max(1.0, segment->samplerate());
150 const pv::util::Timestamp& start_time = segment->start_time();
151 const int64_t last_sample = segment->get_sample_count() - 1;
152 const double samples_per_pixel = samplerate * pp.scale();
153 const pv::util::Timestamp start = samplerate * (pp.offset() - start_time);
154 const pv::util::Timestamp end = start + samples_per_pixel * pp.width();
156 const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(),
157 (int64_t)0), last_sample);
158 const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(),
159 (int64_t)0), last_sample);
161 if (samples_per_pixel < EnvelopeThreshold)
162 paint_trace(p, segment, y, pp.left(),
163 start_sample, end_sample,
164 pixels_offset, samples_per_pixel);
166 paint_envelope(p, segment, y, pp.left(),
167 start_sample, end_sample,
168 pixels_offset, samples_per_pixel);
171 void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right)
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));
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));
195 void AnalogSignal::paint_trace(QPainter &p,
196 const shared_ptr<pv::data::AnalogSegment> &segment,
197 int y, int left, const int64_t start, const int64_t end,
198 const double pixels_offset, const double samples_per_pixel)
200 const int64_t sample_count = end - start;
202 const float *const samples = segment->get_samples(start, end);
207 QPointF *points = new QPointF[sample_count];
208 QPointF *point = points;
210 for (int64_t sample = start; sample != end; sample++) {
211 const float x = (sample / samples_per_pixel -
212 pixels_offset) + left;
213 *point++ = QPointF(x,
214 y - samples[sample - start] * scale_);
217 p.drawPolyline(points, point - points);
223 void AnalogSignal::paint_envelope(QPainter &p,
224 const shared_ptr<pv::data::AnalogSegment> &segment,
225 int y, int left, const int64_t start, const int64_t end,
226 const double pixels_offset, const double samples_per_pixel)
228 using pv::data::AnalogSegment;
230 AnalogSegment::EnvelopeSection e;
231 segment->get_envelope_section(e, start, end, samples_per_pixel);
236 p.setPen(QPen(Qt::NoPen));
239 QRectF *const rects = new QRectF[e.length];
240 QRectF *rect = rects;
242 for (uint64_t sample = 0; sample < e.length-1; sample++) {
243 const float x = ((e.scale * sample + e.start) /
244 samples_per_pixel - pixels_offset) + left;
245 const AnalogSegment::EnvelopeSample *const s =
248 // We overlap this sample with the next so that vertical
249 // gaps do not appear during steep rising or falling edges
250 const float b = y - max(s->max, (s+1)->min) * scale_;
251 const float t = y - min(s->min, (s+1)->max) * scale_;
254 if (h >= 0.0f && h <= 1.0f)
256 if (h <= 0.0f && h >= -1.0f)
259 *rect++ = QRectF(x, t, 1.0f, h);
262 p.drawRects(rects, e.length);
268 void AnalogSignal::update_scale()
270 const float seq[] = {1.0f, 2.0f, 5.0f};
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),
277 resolution_ = powf(10.0f, d.quot - offset) * seq[d.rem];
278 scale_ = div_height_ / resolution_;
281 void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form)
283 // Add the standard options
284 Signal::populate_popup_form(parent, form);
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);
295 void AnalogSignal::on_vdivs_changed(int vdivs)
300 owner_->extents_changed(false, true);