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
25 #include "analogsignal.h"
26 #include "pv/data/analog.h"
27 #include "pv/data/analogsnapshot.h"
28 #include "pv/view/view.h"
30 using boost::shared_ptr;
38 const QColor AnalogSignal::SignalColours[4] = {
39 QColor(0xC4, 0xA0, 0x00), // Yellow
40 QColor(0x87, 0x20, 0x7A), // Magenta
41 QColor(0x20, 0x4A, 0x87), // Blue
42 QColor(0x4E, 0x9A, 0x06) // Green
45 const float AnalogSignal::EnvelopeThreshold = 256.0f;
47 AnalogSignal::AnalogSignal(pv::SigSession &session, sr_probe *const probe,
48 shared_ptr<data::Analog> data) :
49 Signal(session, probe),
53 _colour = SignalColours[probe->index % countof(SignalColours)];
56 AnalogSignal::~AnalogSignal()
60 boost::shared_ptr<pv::data::SignalData> AnalogSignal::data() const
65 void AnalogSignal::set_scale(float scale)
70 void AnalogSignal::paint_back(QPainter &p, int left, int right)
73 paint_axis(p, get_y(), left, right);
76 void AnalogSignal::paint_mid(QPainter &p, int left, int right)
79 assert(right >= left);
82 const int y = _v_offset - _view->v_offset();
84 const double scale = _view->scale();
87 const double offset = _view->offset();
92 const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots =
93 _data->get_snapshots();
94 if (snapshots.empty())
97 const shared_ptr<pv::data::AnalogSnapshot> &snapshot =
100 const double pixels_offset = offset / scale;
101 const double samplerate = _data->samplerate();
102 const double start_time = _data->get_start_time();
103 const int64_t last_sample = snapshot->get_sample_count() - 1;
104 const double samples_per_pixel = samplerate * scale;
105 const double start = samplerate * (offset - start_time);
106 const double end = start + samples_per_pixel * (right - left);
108 const int64_t start_sample = min(max((int64_t)floor(start),
109 (int64_t)0), last_sample);
110 const int64_t end_sample = min(max((int64_t)ceil(end) + 1,
111 (int64_t)0), last_sample);
113 if (samples_per_pixel < EnvelopeThreshold)
114 paint_trace(p, snapshot, y, left,
115 start_sample, end_sample,
116 pixels_offset, samples_per_pixel);
118 paint_envelope(p, snapshot, y, left,
119 start_sample, end_sample,
120 pixels_offset, samples_per_pixel);
123 void AnalogSignal::paint_trace(QPainter &p,
124 const shared_ptr<pv::data::AnalogSnapshot> &snapshot,
125 int y, int left, const int64_t start, const int64_t end,
126 const double pixels_offset, const double samples_per_pixel)
128 const int64_t sample_count = end - start;
130 const float *const samples = snapshot->get_samples(start, end);
135 QPointF *points = new QPointF[sample_count];
136 QPointF *point = points;
138 for (int64_t sample = start; sample != end; sample++) {
139 const float x = (sample / samples_per_pixel -
140 pixels_offset) + left;
141 *point++ = QPointF(x,
142 y - samples[sample - start] * _scale);
145 p.drawPolyline(points, point - points);
151 void AnalogSignal::paint_envelope(QPainter &p,
152 const shared_ptr<pv::data::AnalogSnapshot> &snapshot,
153 int y, int left, const int64_t start, const int64_t end,
154 const double pixels_offset, const double samples_per_pixel)
156 using pv::data::AnalogSnapshot;
158 AnalogSnapshot::EnvelopeSection e;
159 snapshot->get_envelope_section(e, start, end, samples_per_pixel);
164 p.setPen(QPen(Qt::NoPen));
167 QRectF *const rects = new QRectF[e.length];
168 QRectF *rect = rects;
170 for(uint64_t sample = 0; sample < e.length-1; sample++) {
171 const float x = ((e.scale * sample + e.start) /
172 samples_per_pixel - pixels_offset) + left;
173 const AnalogSnapshot::EnvelopeSample *const s =
176 // We overlap this sample with the next so that vertical
177 // gaps do not appear during steep rising or falling edges
178 const float b = y - max(s->max, (s+1)->min) * _scale;
179 const float t = y - min(s->min, (s+1)->max) * _scale;
182 if(h >= 0.0f && h <= 1.0f)
184 if(h <= 0.0f && h >= -1.0f)
187 *rect++ = QRectF(x, t, 1.0f, h);
190 p.drawRects(rects, e.length);