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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> | |
aba1dd16 | 25 | |
2acdb232 JH |
26 | #include "analogsignal.hpp" |
27 | #include "pv/data/analog.hpp" | |
f3d66e52 | 28 | #include "pv/data/analogsegment.hpp" |
2acdb232 | 29 | #include "pv/view/view.hpp" |
aba1dd16 | 30 | |
e8d00928 ML |
31 | #include <libsigrok/libsigrok.hpp> |
32 | ||
819f4c25 | 33 | using std::max; |
a5d93c27 | 34 | using std::make_pair; |
819f4c25 | 35 | using std::min; |
f9abf97e | 36 | using std::shared_ptr; |
819f4c25 | 37 | using std::deque; |
aba1dd16 | 38 | |
e8d00928 ML |
39 | using sigrok::Channel; |
40 | ||
aba1dd16 JH |
41 | namespace pv { |
42 | namespace view { | |
43 | ||
a5d93c27 JH |
44 | const int AnalogSignal::NominalHeight = 80; |
45 | ||
568b90d4 JH |
46 | const QColor AnalogSignal::SignalColours[4] = { |
47 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
48 | QColor(0x87, 0x20, 0x7A), // Magenta | |
49 | QColor(0x20, 0x4A, 0x87), // Blue | |
50 | QColor(0x4E, 0x9A, 0x06) // Green | |
51 | }; | |
52 | ||
7c68ddae JH |
53 | const float AnalogSignal::EnvelopeThreshold = 256.0f; |
54 | ||
b86aa8f4 | 55 | AnalogSignal::AnalogSignal( |
2b81ae46 | 56 | pv::Session &session, |
b86aa8f4 | 57 | shared_ptr<Channel> channel, |
e8d00928 | 58 | shared_ptr<data::Analog> data) : |
b86aa8f4 | 59 | Signal(session, channel), |
8dbbc7f0 JH |
60 | data_(data), |
61 | scale_(1.0f) | |
aba1dd16 | 62 | { |
8dbbc7f0 | 63 | colour_ = SignalColours[channel_->index() % countof(SignalColours)]; |
aba1dd16 JH |
64 | } |
65 | ||
f459c540 JH |
66 | AnalogSignal::~AnalogSignal() |
67 | { | |
68 | } | |
69 | ||
3009b5b3 JH |
70 | shared_ptr<pv::data::SignalData> AnalogSignal::data() const |
71 | { | |
8dbbc7f0 | 72 | return data_; |
3009b5b3 JH |
73 | } |
74 | ||
75 | shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const | |
9a0cd293 | 76 | { |
8dbbc7f0 | 77 | return data_; |
9a0cd293 JH |
78 | } |
79 | ||
785fd8d1 JH |
80 | void AnalogSignal::set_scale(float scale) |
81 | { | |
8dbbc7f0 | 82 | scale_ = scale; |
785fd8d1 JH |
83 | } |
84 | ||
a5d93c27 JH |
85 | std::pair<int, int> AnalogSignal::v_extents() const |
86 | { | |
87 | return make_pair(-NominalHeight / 2, NominalHeight / 2); | |
88 | } | |
89 | ||
3eb29afd | 90 | void AnalogSignal::paint_back(QPainter &p, const RowItemPaintParams &pp) |
fe08b6e8 | 91 | { |
8dbbc7f0 | 92 | if (channel_->enabled()) |
97904bf7 | 93 | paint_axis(p, pp, get_visual_y()); |
fe08b6e8 JH |
94 | } |
95 | ||
3eb29afd | 96 | void AnalogSignal::paint_mid(QPainter &p, const RowItemPaintParams &pp) |
aba1dd16 | 97 | { |
8dbbc7f0 | 98 | assert(data_); |
8dbbc7f0 | 99 | assert(owner_); |
a8acb46e | 100 | |
be9e7b4b | 101 | const int y = get_visual_y(); |
01fd3263 | 102 | |
8dbbc7f0 | 103 | if (!channel_->enabled()) |
cec48d16 JH |
104 | return; |
105 | ||
f3d66e52 JH |
106 | const deque< shared_ptr<pv::data::AnalogSegment> > &segments = |
107 | data_->analog_segments(); | |
108 | if (segments.empty()) | |
a8acb46e JH |
109 | return; |
110 | ||
f3d66e52 JH |
111 | const shared_ptr<pv::data::AnalogSegment> &segment = |
112 | segments.front(); | |
a8acb46e | 113 | |
4c8a6a6d | 114 | const double pixels_offset = pp.pixels_offset(); |
f3d66e52 JH |
115 | const double samplerate = segment->samplerate(); |
116 | const double start_time = segment->start_time(); | |
117 | const int64_t last_sample = segment->get_sample_count() - 1; | |
4c8a6a6d JH |
118 | const double samples_per_pixel = samplerate * pp.scale(); |
119 | const double start = samplerate * (pp.offset() - start_time); | |
3eb29afd | 120 | const double end = start + samples_per_pixel * pp.width(); |
a8acb46e JH |
121 | |
122 | const int64_t start_sample = min(max((int64_t)floor(start), | |
123 | (int64_t)0), last_sample); | |
306d43a7 | 124 | const int64_t end_sample = min(max((int64_t)ceil(end) + 1, |
a8acb46e JH |
125 | (int64_t)0), last_sample); |
126 | ||
7c68ddae | 127 | if (samples_per_pixel < EnvelopeThreshold) |
f3d66e52 | 128 | paint_trace(p, segment, y, pp.left(), |
7c68ddae JH |
129 | start_sample, end_sample, |
130 | pixels_offset, samples_per_pixel); | |
131 | else | |
f3d66e52 | 132 | paint_envelope(p, segment, y, pp.left(), |
7c68ddae JH |
133 | start_sample, end_sample, |
134 | pixels_offset, samples_per_pixel); | |
135 | } | |
136 | ||
137 | void AnalogSignal::paint_trace(QPainter &p, | |
f3d66e52 | 138 | const shared_ptr<pv::data::AnalogSegment> &segment, |
7c68ddae JH |
139 | int y, int left, const int64_t start, const int64_t end, |
140 | const double pixels_offset, const double samples_per_pixel) | |
141 | { | |
142 | const int64_t sample_count = end - start; | |
143 | ||
f3d66e52 | 144 | const float *const samples = segment->get_samples(start, end); |
a8acb46e JH |
145 | assert(samples); |
146 | ||
8dbbc7f0 | 147 | p.setPen(colour_); |
7c68ddae | 148 | |
d3758367 | 149 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
150 | QPointF *point = points; |
151 | ||
7c68ddae | 152 | for (int64_t sample = start; sample != end; sample++) { |
a8acb46e | 153 | const float x = (sample / samples_per_pixel - |
2658961b | 154 | pixels_offset) + left; |
d3758367 | 155 | *point++ = QPointF(x, |
8dbbc7f0 | 156 | y - samples[sample - start] * scale_); |
a8acb46e JH |
157 | } |
158 | ||
306d43a7 | 159 | p.drawPolyline(points, point - points); |
a8acb46e | 160 | |
7c68ddae | 161 | delete[] samples; |
a8acb46e | 162 | delete[] points; |
aba1dd16 JH |
163 | } |
164 | ||
7c68ddae | 165 | void AnalogSignal::paint_envelope(QPainter &p, |
f3d66e52 | 166 | const shared_ptr<pv::data::AnalogSegment> &segment, |
7c68ddae JH |
167 | int y, int left, const int64_t start, const int64_t end, |
168 | const double pixels_offset, const double samples_per_pixel) | |
169 | { | |
f3d66e52 | 170 | using pv::data::AnalogSegment; |
7c68ddae | 171 | |
f3d66e52 JH |
172 | AnalogSegment::EnvelopeSection e; |
173 | segment->get_envelope_section(e, start, end, samples_per_pixel); | |
7c68ddae JH |
174 | |
175 | if (e.length < 2) | |
176 | return; | |
177 | ||
819f4c25 | 178 | p.setPen(QPen(Qt::NoPen)); |
8dbbc7f0 | 179 | p.setBrush(colour_); |
7c68ddae JH |
180 | |
181 | QRectF *const rects = new QRectF[e.length]; | |
182 | QRectF *rect = rects; | |
183 | ||
184 | for(uint64_t sample = 0; sample < e.length-1; sample++) { | |
185 | const float x = ((e.scale * sample + e.start) / | |
186 | samples_per_pixel - pixels_offset) + left; | |
f3d66e52 | 187 | const AnalogSegment::EnvelopeSample *const s = |
7c68ddae JH |
188 | e.samples + sample; |
189 | ||
190 | // We overlap this sample with the next so that vertical | |
191 | // gaps do not appear during steep rising or falling edges | |
8dbbc7f0 JH |
192 | const float b = y - max(s->max, (s+1)->min) * scale_; |
193 | const float t = y - min(s->min, (s+1)->max) * scale_; | |
7c68ddae JH |
194 | |
195 | float h = b - t; | |
196 | if(h >= 0.0f && h <= 1.0f) | |
197 | h = 1.0f; | |
198 | if(h <= 0.0f && h >= -1.0f) | |
199 | h = -1.0f; | |
200 | ||
201 | *rect++ = QRectF(x, t, 1.0f, h); | |
202 | } | |
203 | ||
204 | p.drawRects(rects, e.length); | |
205 | ||
206 | delete[] rects; | |
207 | delete[] e.samples; | |
208 | } | |
209 | ||
aba1dd16 JH |
210 | } // namespace view |
211 | } // namespace pv |