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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::pair; | |
31 | ||
32 | namespace AnalogSegmentTest { | |
33 | struct Basic; | |
34 | } | |
35 | ||
36 | namespace pv { | |
37 | namespace data { | |
38 | ||
39 | class Analog; | |
40 | ||
41 | typedef struct { | |
42 | uint64_t sample_index, chunk_num, chunk_offs; | |
43 | uint8_t* chunk; | |
44 | float* value; | |
45 | } SegmentAnalogDataIterator; | |
46 | ||
47 | class AnalogSegment : public QObject, public Segment | |
48 | { | |
49 | Q_OBJECT | |
50 | ||
51 | public: | |
52 | struct EnvelopeSample | |
53 | { | |
54 | float min; | |
55 | float max; | |
56 | }; | |
57 | ||
58 | struct EnvelopeSection | |
59 | { | |
60 | uint64_t start; | |
61 | unsigned int scale; | |
62 | uint64_t length; | |
63 | EnvelopeSample *samples; | |
64 | }; | |
65 | ||
66 | private: | |
67 | struct Envelope | |
68 | { | |
69 | uint64_t length; | |
70 | uint64_t data_length; | |
71 | EnvelopeSample *samples; | |
72 | }; | |
73 | ||
74 | private: | |
75 | static const unsigned int ScaleStepCount = 10; | |
76 | static const int EnvelopeScalePower; | |
77 | static const int EnvelopeScaleFactor; | |
78 | static const float LogEnvelopeScaleFactor; | |
79 | static const uint64_t EnvelopeDataUnit; | |
80 | ||
81 | public: | |
82 | AnalogSegment(Analog& owner, uint64_t samplerate); | |
83 | ||
84 | virtual ~AnalogSegment(); | |
85 | ||
86 | void append_interleaved_samples(const float *data, | |
87 | size_t sample_count, size_t stride); | |
88 | ||
89 | const float* get_samples(int64_t start_sample, | |
90 | int64_t end_sample) const; | |
91 | ||
92 | const pair<float, float> get_min_max() const; | |
93 | ||
94 | SegmentAnalogDataIterator* begin_sample_iteration(uint64_t start); | |
95 | void continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase); | |
96 | void end_sample_iteration(SegmentAnalogDataIterator* it); | |
97 | ||
98 | void get_envelope_section(EnvelopeSection &s, | |
99 | uint64_t start, uint64_t end, float min_length) const; | |
100 | ||
101 | private: | |
102 | void reallocate_envelope(Envelope &e); | |
103 | ||
104 | void append_payload_to_envelope_levels(); | |
105 | ||
106 | private: | |
107 | Analog& owner_; | |
108 | ||
109 | struct Envelope envelope_levels_[ScaleStepCount]; | |
110 | ||
111 | float min_value_, max_value_; | |
112 | ||
113 | friend struct AnalogSegmentTest::Basic; | |
114 | }; | |
115 | ||
116 | } // namespace data | |
117 | } // namespace pv | |
118 | ||
119 | #endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP |