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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 | namespace AnalogSegmentTest { | |
29 | struct Basic; | |
30 | } | |
31 | ||
32 | namespace pv { | |
33 | namespace data { | |
34 | ||
35 | typedef struct { | |
36 | uint64_t sample_index, chunk_num, chunk_offs; | |
37 | uint8_t* chunk; | |
38 | float* value; | |
39 | } SegmentAnalogDataIterator; | |
40 | ||
41 | class AnalogSegment : public Segment | |
42 | { | |
43 | public: | |
44 | struct EnvelopeSample | |
45 | { | |
46 | float min; | |
47 | float max; | |
48 | }; | |
49 | ||
50 | struct EnvelopeSection | |
51 | { | |
52 | uint64_t start; | |
53 | unsigned int scale; | |
54 | uint64_t length; | |
55 | EnvelopeSample *samples; | |
56 | }; | |
57 | ||
58 | private: | |
59 | struct Envelope | |
60 | { | |
61 | uint64_t length; | |
62 | uint64_t data_length; | |
63 | EnvelopeSample *samples; | |
64 | }; | |
65 | ||
66 | private: | |
67 | static const unsigned int ScaleStepCount = 10; | |
68 | static const int EnvelopeScalePower; | |
69 | static const int EnvelopeScaleFactor; | |
70 | static const float LogEnvelopeScaleFactor; | |
71 | static const uint64_t EnvelopeDataUnit; | |
72 | ||
73 | public: | |
74 | AnalogSegment(uint64_t samplerate); | |
75 | ||
76 | virtual ~AnalogSegment(); | |
77 | ||
78 | void append_interleaved_samples(const float *data, | |
79 | size_t sample_count, size_t stride); | |
80 | ||
81 | const float* get_samples(int64_t start_sample, | |
82 | int64_t end_sample) const; | |
83 | ||
84 | SegmentAnalogDataIterator* begin_sample_iteration(uint64_t start) const; | |
85 | void continue_sample_iteration(SegmentAnalogDataIterator* it, uint64_t increase) const; | |
86 | void end_sample_iteration(SegmentAnalogDataIterator* it) const; | |
87 | ||
88 | void get_envelope_section(EnvelopeSection &s, | |
89 | uint64_t start, uint64_t end, float min_length) const; | |
90 | ||
91 | private: | |
92 | void reallocate_envelope(Envelope &e); | |
93 | ||
94 | void append_payload_to_envelope_levels(); | |
95 | ||
96 | private: | |
97 | struct Envelope envelope_levels_[ScaleStepCount]; | |
98 | ||
99 | friend struct AnalogSegmentTest::Basic; | |
100 | }; | |
101 | ||
102 | } // namespace data | |
103 | } // namespace pv | |
104 | ||
105 | #endif // PULSEVIEW_PV_DATA_ANALOGSEGMENT_HPP |