]> sigrok.org Git - pulseview.git/blame - pv/data/analogsnapshot.h
Added code to construct analog envelope levels
[pulseview.git] / pv / data / analogsnapshot.h
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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
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21#ifndef PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H
22#define PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H
aba1dd16 23
1b1ec774 24#include "snapshot.h"
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25
26#include <utility>
27#include <vector>
28
29namespace pv {
1b1ec774 30namespace data {
aba1dd16 31
1b1ec774 32class AnalogSnapshot : public Snapshot
aba1dd16 33{
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34private:
35 struct EnvelopeSample
36 {
37 float min;
38 float max;
39 };
40
41 struct Envelope
42 {
43 uint64_t length;
44 uint64_t data_length;
45 EnvelopeSample *samples;
46 };
47
48private:
49 static const unsigned int ScaleStepCount = 10;
50 static const int EnvelopeScalePower;
51 static const int EnvelopeScaleFactor;
52 static const float LogEnvelopeScaleFactor;
53 static const uint64_t EnvelopeDataUnit;
54
aba1dd16 55public:
1b1ec774 56 AnalogSnapshot(const sr_datafeed_analog &analog);
aba1dd16 57
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58 virtual ~AnalogSnapshot();
59
aba1dd16 60 void append_payload(const sr_datafeed_analog &analog);
a8acb46e 61
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62 const float* get_samples(int64_t start_sample,
63 int64_t end_sample) const;
aba1dd16 64
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65private:
66 void reallocate_envelope(Envelope &l);
67
68 void append_payload_to_envelope_levels();
69
70private:
71 struct Envelope _envelope_levels[ScaleStepCount];
1b1ec774 72} // namespace data
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73} // namespace pv
74
1b1ec774 75#endif // PULSEVIEW_PV_DATA_ANALOGSNAPSHOT_H