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