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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 | ||
23 | #include <math.h> | |
24 | ||
25 | #include "analogsignal.h" | |
1b1ec774 JH |
26 | #include "pv/data/analog.h" |
27 | #include "pv/data/analogsnapshot.h" | |
aba1dd16 JH |
28 | |
29 | using namespace boost; | |
30 | using namespace std; | |
31 | ||
32 | namespace pv { | |
33 | namespace view { | |
34 | ||
568b90d4 JH |
35 | const QColor AnalogSignal::SignalColours[4] = { |
36 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
37 | QColor(0x87, 0x20, 0x7A), // Magenta | |
38 | QColor(0x20, 0x4A, 0x87), // Blue | |
39 | QColor(0x4E, 0x9A, 0x06) // Green | |
40 | }; | |
41 | ||
7c68ddae JH |
42 | const float AnalogSignal::EnvelopeThreshold = 256.0f; |
43 | ||
568b90d4 JH |
44 | AnalogSignal::AnalogSignal(QString name, shared_ptr<data::Analog> data, |
45 | int probe_index) : | |
aba1dd16 | 46 | Signal(name), |
785fd8d1 JH |
47 | _data(data), |
48 | _scale(1.0f) | |
aba1dd16 | 49 | { |
568b90d4 | 50 | _colour = SignalColours[probe_index % countof(SignalColours)]; |
aba1dd16 JH |
51 | } |
52 | ||
785fd8d1 JH |
53 | void AnalogSignal::set_scale(float scale) |
54 | { | |
55 | _scale = scale; | |
56 | } | |
57 | ||
2658961b | 58 | void AnalogSignal::paint(QPainter &p, int y, int left, int right, double scale, |
aba1dd16 JH |
59 | double offset) |
60 | { | |
a8acb46e JH |
61 | assert(scale > 0); |
62 | assert(_data); | |
2658961b | 63 | assert(right >= left); |
a8acb46e | 64 | |
3ef6182a JH |
65 | paint_axis(p, y, left, right); |
66 | ||
1b1ec774 | 67 | const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots = |
a8acb46e JH |
68 | _data->get_snapshots(); |
69 | if (snapshots.empty()) | |
70 | return; | |
71 | ||
1b1ec774 | 72 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot = |
a8acb46e JH |
73 | snapshots.front(); |
74 | ||
75 | const double pixels_offset = offset / scale; | |
76 | const double samplerate = _data->get_samplerate(); | |
77 | const double start_time = _data->get_start_time(); | |
78 | const int64_t last_sample = snapshot->get_sample_count() - 1; | |
79 | const double samples_per_pixel = samplerate * scale; | |
80 | const double start = samplerate * (offset - start_time); | |
2658961b | 81 | const double end = start + samples_per_pixel * (right - left); |
a8acb46e JH |
82 | |
83 | const int64_t start_sample = min(max((int64_t)floor(start), | |
84 | (int64_t)0), last_sample); | |
306d43a7 | 85 | const int64_t end_sample = min(max((int64_t)ceil(end) + 1, |
a8acb46e JH |
86 | (int64_t)0), last_sample); |
87 | ||
7c68ddae JH |
88 | if (samples_per_pixel < EnvelopeThreshold) |
89 | paint_trace(p, snapshot, y, left, | |
90 | start_sample, end_sample, | |
91 | pixels_offset, samples_per_pixel); | |
92 | else | |
93 | paint_envelope(p, snapshot, y, left, | |
94 | start_sample, end_sample, | |
95 | pixels_offset, samples_per_pixel); | |
96 | } | |
97 | ||
98 | void AnalogSignal::paint_trace(QPainter &p, | |
99 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
100 | int y, int left, const int64_t start, const int64_t end, | |
101 | const double pixels_offset, const double samples_per_pixel) | |
102 | { | |
103 | const int64_t sample_count = end - start; | |
104 | ||
105 | const float *const samples = snapshot->get_samples(start, end); | |
a8acb46e JH |
106 | assert(samples); |
107 | ||
7c68ddae JH |
108 | p.setPen(_colour); |
109 | ||
d3758367 | 110 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
111 | QPointF *point = points; |
112 | ||
7c68ddae | 113 | for (int64_t sample = start; sample != end; sample++) { |
a8acb46e | 114 | const float x = (sample / samples_per_pixel - |
2658961b | 115 | pixels_offset) + left; |
d3758367 | 116 | *point++ = QPointF(x, |
7c68ddae | 117 | y - samples[sample - start] * _scale); |
a8acb46e JH |
118 | } |
119 | ||
306d43a7 | 120 | p.drawPolyline(points, point - points); |
a8acb46e | 121 | |
7c68ddae | 122 | delete[] samples; |
a8acb46e | 123 | delete[] points; |
aba1dd16 JH |
124 | } |
125 | ||
7c68ddae JH |
126 | void AnalogSignal::paint_envelope(QPainter &p, |
127 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot, | |
128 | int y, int left, const int64_t start, const int64_t end, | |
129 | const double pixels_offset, const double samples_per_pixel) | |
130 | { | |
131 | using namespace Qt; | |
132 | using pv::data::AnalogSnapshot; | |
133 | ||
134 | AnalogSnapshot::EnvelopeSection e; | |
135 | snapshot->get_envelope_section(e, start, end, samples_per_pixel); | |
136 | ||
137 | if (e.length < 2) | |
138 | return; | |
139 | ||
140 | p.setPen(QPen(NoPen)); | |
141 | p.setBrush(_colour); | |
142 | ||
143 | QRectF *const rects = new QRectF[e.length]; | |
144 | QRectF *rect = rects; | |
145 | ||
146 | for(uint64_t sample = 0; sample < e.length-1; sample++) { | |
147 | const float x = ((e.scale * sample + e.start) / | |
148 | samples_per_pixel - pixels_offset) + left; | |
149 | const AnalogSnapshot::EnvelopeSample *const s = | |
150 | e.samples + sample; | |
151 | ||
152 | // We overlap this sample with the next so that vertical | |
153 | // gaps do not appear during steep rising or falling edges | |
154 | const float b = y - max(s->max, (s+1)->min) * _scale; | |
155 | const float t = y - min(s->min, (s+1)->max) * _scale; | |
156 | ||
157 | float h = b - t; | |
158 | if(h >= 0.0f && h <= 1.0f) | |
159 | h = 1.0f; | |
160 | if(h <= 0.0f && h >= -1.0f) | |
161 | h = -1.0f; | |
162 | ||
163 | *rect++ = QRectF(x, t, 1.0f, h); | |
164 | } | |
165 | ||
166 | p.drawRects(rects, e.length); | |
167 | ||
168 | delete[] rects; | |
169 | delete[] e.samples; | |
170 | } | |
171 | ||
aba1dd16 JH |
172 | } // namespace view |
173 | } // namespace pv |