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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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP | |
21 | #define PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP | |
22 | ||
23 | #include "segment.hpp" | |
24 | ||
25 | #include <utility> | |
26 | #include <vector> | |
27 | ||
28 | #include <QObject> | |
29 | ||
30 | using std::enable_shared_from_this; | |
31 | using std::pair; | |
32 | ||
33 | namespace AnalogSegmentTest { | |
34 | struct Basic; | |
35 | } | |
36 | ||
37 | namespace pv { | |
38 | namespace data { | |
39 | ||
40 | class Analog; | |
41 | ||
42 | class AnalogSegment : public Segment, public enable_shared_from_this<Segment> | |
43 | { | |
44 | Q_OBJECT | |
45 | ||
46 | public: | |
47 | struct EnvelopeSample | |
48 | { | |
49 | float min; | |
50 | float max; | |
51 | }; | |
52 | ||
53 | struct EnvelopeSection | |
54 | { | |
55 | uint64_t start; | |
56 | unsigned int scale; | |
57 | uint64_t length; | |
58 | EnvelopeSample *samples; | |
59 | }; | |
60 | ||
61 | private: | |
62 | struct Envelope | |
63 | { | |
64 | uint64_t length; | |
65 | uint64_t data_length; | |
66 | EnvelopeSample *samples; | |
67 | }; | |
68 | ||
69 | private: | |
70 | static const unsigned int ScaleStepCount = 10; | |
71 | static const int EnvelopeScalePower; | |
72 | static const int EnvelopeScaleFactor; | |
73 | static const float LogEnvelopeScaleFactor; | |
74 | static const uint64_t EnvelopeDataUnit; | |
75 | ||
76 | public: | |
77 | AnalogSegment(Analog& owner, uint32_t segment_id, uint64_t samplerate); | |
78 | ||
79 | virtual ~AnalogSegment(); | |
80 | ||
81 | void append_interleaved_samples(const float *data, | |
82 | size_t sample_count, size_t stride); | |
83 | ||
84 | float get_sample(int64_t sample_num) const; | |
85 | void get_samples(int64_t start_sample, int64_t end_sample, float* dest) const; | |
86 | ||
87 | const pair<float, float> get_min_max() const; | |
88 | ||
89 | float* get_iterator_value_ptr(SegmentDataIterator* it); | |
90 | ||
91 | void get_envelope_section(EnvelopeSection &s, | |
92 | uint64_t start, uint64_t end, float min_length) const; | |
93 | ||
94 | private: | |
95 | void reallocate_envelope(Envelope &e); | |
96 | ||
97 | void append_payload_to_envelope_levels(); | |
98 | ||
99 | private: | |
100 | Analog& owner_; | |
101 | ||
102 | struct Envelope envelope_levels_[ScaleStepCount]; | |
103 | ||
104 | float min_value_, max_value_; | |
105 | ||
106 | friend struct AnalogSegmentTest::Basic; | |
107 | }; | |
108 | ||
109 | } // namespace data | |
110 | } // namespace pv | |
111 | ||
112 | #endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP |