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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 JH |
25 | |
26 | #include "analogsignal.h" | |
1b1ec774 JH |
27 | #include "pv/data/analog.h" |
28 | #include "pv/data/analogsnapshot.h" | |
01fd3263 | 29 | #include "pv/view/view.h" |
aba1dd16 | 30 | |
e8d00928 ML |
31 | #include <libsigrok/libsigrok.hpp> |
32 | ||
819f4c25 JH |
33 | using std::max; |
34 | using std::min; | |
f9abf97e | 35 | using std::shared_ptr; |
819f4c25 | 36 | using std::deque; |
aba1dd16 | 37 | |
e8d00928 ML |
38 | using sigrok::Channel; |
39 | ||
aba1dd16 JH |
40 | namespace pv { |
41 | namespace view { | |
42 | ||
568b90d4 JH |
43 | const QColor AnalogSignal::SignalColours[4] = { |
44 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
45 | QColor(0x87, 0x20, 0x7A), // Magenta | |
46 | QColor(0x20, 0x4A, 0x87), // Blue | |
47 | QColor(0x4E, 0x9A, 0x06) // Green | |
48 | }; | |
49 | ||
7c68ddae JH |
50 | const float AnalogSignal::EnvelopeThreshold = 256.0f; |
51 | ||
b86aa8f4 JH |
52 | AnalogSignal::AnalogSignal( |
53 | pv::SigSession &session, | |
54 | shared_ptr<Channel> channel, | |
e8d00928 | 55 | shared_ptr<data::Analog> data) : |
b86aa8f4 | 56 | Signal(session, channel), |
785fd8d1 JH |
57 | _data(data), |
58 | _scale(1.0f) | |
aba1dd16 | 59 | { |
e8d00928 | 60 | _colour = SignalColours[_channel->index() % countof(SignalColours)]; |
aba1dd16 JH |
61 | } |
62 | ||
f459c540 JH |
63 | AnalogSignal::~AnalogSignal() |
64 | { | |
65 | } | |
66 | ||
3009b5b3 JH |
67 | shared_ptr<pv::data::SignalData> AnalogSignal::data() const |
68 | { | |
69 | return _data; | |
70 | } | |
71 | ||
72 | shared_ptr<pv::data::Analog> AnalogSignal::analog_data() const | |
9a0cd293 JH |
73 | { |
74 | return _data; | |
75 | } | |
76 | ||
785fd8d1 JH |
77 | void AnalogSignal::set_scale(float scale) |
78 | { | |
79 | _scale = scale; | |
80 | } | |
81 | ||
fe08b6e8 JH |
82 | void AnalogSignal::paint_back(QPainter &p, int left, int right) |
83 | { | |
e8d00928 | 84 | if (_channel->enabled()) |
fe08b6e8 JH |
85 | paint_axis(p, get_y(), left, right); |
86 | } | |
87 | ||
88 | void AnalogSignal::paint_mid(QPainter &p, int left, int right) | |
aba1dd16 | 89 | { |
a8acb46e | 90 | assert(_data); |
2658961b | 91 | assert(right >= left); |
eae6e30a | 92 | assert(_owner); |
a8acb46e | 93 | |
d5d1f925 | 94 | const int y = get_y(); |
01fd3263 | 95 | |
eae6e30a JH |
96 | const View *const view = _owner->view(); |
97 | assert(view); | |
98 | ||
99 | const double scale = view->scale(); | |
01fd3263 JH |
100 | assert(scale > 0); |
101 | ||
eae6e30a | 102 | const double offset = view->offset(); |
01fd3263 | 103 | |
e8d00928 | 104 | if (!_channel->enabled()) |
cec48d16 JH |
105 | return; |
106 | ||
1b1ec774 | 107 | const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots = |
a8acb46e JH |
108 | _data->get_snapshots(); |
109 | if (snapshots.empty()) | |
110 | return; | |
111 | ||
1b1ec774 | 112 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot = |
a8acb46e JH |
113 | snapshots.front(); |
114 | ||
115 | const double pixels_offset = offset / scale; | |
9d28da5a | 116 | const double samplerate = _data->samplerate(); |
a8acb46e JH |
117 | const double start_time = _data->get_start_time(); |
118 | const int64_t last_sample = snapshot->get_sample_count() - 1; | |
119 | const double samples_per_pixel = samplerate * scale; | |
120 | const double start = samplerate * (offset - start_time); | |
2658961b | 121 | const double end = start + samples_per_pixel * (right - left); |
a8acb46e JH |
122 | |
123 | const int64_t start_sample = min(max((int64_t)floor(start), | |
124 | (int64_t)0), last_sample); | |
306d43a7 | 125 | const int64_t end_sample = min(max((int64_t)ceil(end) + 1, |
a8acb46e JH |
126 | (int64_t)0), last_sample); |
127 | ||
7c68ddae JH |
128 | if (samples_per_pixel < EnvelopeThreshold) |
129 | paint_trace(p, snapshot, y, left, | |
130 | start_sample, end_sample, | |
131 | pixels_offset, samples_per_pixel); | |
132 | else | |
133 | paint_envelope(p, snapshot, y, left, | |
134 | start_sample, end_sample, | |
135 | pixels_offset, samples_per_pixel); | |
136 | } | |
137 | ||
138 | void AnalogSignal::paint_trace(QPainter &p, | |
139 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
140 | int y, int left, const int64_t start, const int64_t end, | |
141 | const double pixels_offset, const double samples_per_pixel) | |
142 | { | |
143 | const int64_t sample_count = end - start; | |
144 | ||
145 | const float *const samples = snapshot->get_samples(start, end); | |
a8acb46e JH |
146 | assert(samples); |
147 | ||
7c68ddae JH |
148 | p.setPen(_colour); |
149 | ||
d3758367 | 150 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
151 | QPointF *point = points; |
152 | ||
7c68ddae | 153 | for (int64_t sample = start; sample != end; sample++) { |
a8acb46e | 154 | const float x = (sample / samples_per_pixel - |
2658961b | 155 | pixels_offset) + left; |
d3758367 | 156 | *point++ = QPointF(x, |
7c68ddae | 157 | y - samples[sample - start] * _scale); |
a8acb46e JH |
158 | } |
159 | ||
306d43a7 | 160 | p.drawPolyline(points, point - points); |
a8acb46e | 161 | |
7c68ddae | 162 | delete[] samples; |
a8acb46e | 163 | delete[] points; |
aba1dd16 JH |
164 | } |
165 | ||
7c68ddae JH |
166 | void AnalogSignal::paint_envelope(QPainter &p, |
167 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
168 | int y, int left, const int64_t start, const int64_t end, | |
169 | const double pixels_offset, const double samples_per_pixel) | |
170 | { | |
7c68ddae JH |
171 | using pv::data::AnalogSnapshot; |
172 | ||
173 | AnalogSnapshot::EnvelopeSection e; | |
174 | snapshot->get_envelope_section(e, start, end, samples_per_pixel); | |
175 | ||
176 | if (e.length < 2) | |
177 | return; | |
178 | ||
819f4c25 | 179 | p.setPen(QPen(Qt::NoPen)); |
7c68ddae JH |
180 | p.setBrush(_colour); |
181 | ||
182 | QRectF *const rects = new QRectF[e.length]; | |
183 | QRectF *rect = rects; | |
184 | ||
185 | for(uint64_t sample = 0; sample < e.length-1; sample++) { | |
186 | const float x = ((e.scale * sample + e.start) / | |
187 | samples_per_pixel - pixels_offset) + left; | |
188 | const AnalogSnapshot::EnvelopeSample *const s = | |
189 | e.samples + sample; | |
190 | ||
191 | // We overlap this sample with the next so that vertical | |
192 | // gaps do not appear during steep rising or falling edges | |
193 | const float b = y - max(s->max, (s+1)->min) * _scale; | |
194 | const float t = y - min(s->min, (s+1)->max) * _scale; | |
195 | ||
196 | float h = b - t; | |
197 | if(h >= 0.0f && h <= 1.0f) | |
198 | h = 1.0f; | |
199 | if(h <= 0.0f && h >= -1.0f) | |
200 | h = -1.0f; | |
201 | ||
202 | *rect++ = QRectF(x, t, 1.0f, h); | |
203 | } | |
204 | ||
205 | p.drawRects(rects, e.length); | |
206 | ||
207 | delete[] rects; | |
208 | delete[] e.samples; | |
209 | } | |
210 | ||
aba1dd16 JH |
211 | } // namespace view |
212 | } // namespace pv |