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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 | ||
21 | #ifndef PULSEVIEW_PV_DATA_LOGICSNAPSHOT_H | |
22 | #define PULSEVIEW_PV_DATA_LOGICSNAPSHOT_H | |
23 | ||
24 | #include "snapshot.h" | |
25 | ||
26 | #include <utility> | |
27 | #include <vector> | |
28 | ||
29 | namespace sigrok { | |
30 | class Logic; | |
31 | } | |
32 | ||
33 | namespace LogicSnapshotTest { | |
34 | struct Pow2; | |
35 | struct Basic; | |
36 | struct LargeData; | |
37 | struct Pulses; | |
38 | struct LongPulses; | |
39 | } | |
40 | ||
41 | namespace pv { | |
42 | namespace data { | |
43 | ||
44 | class LogicSnapshot : public Snapshot | |
45 | { | |
46 | private: | |
47 | struct MipMapLevel | |
48 | { | |
49 | uint64_t length; | |
50 | uint64_t data_length; | |
51 | void *data; | |
52 | }; | |
53 | ||
54 | private: | |
55 | static const unsigned int ScaleStepCount = 10; | |
56 | static const int MipMapScalePower; | |
57 | static const int MipMapScaleFactor; | |
58 | static const float LogMipMapScaleFactor; | |
59 | static const uint64_t MipMapDataUnit; | |
60 | ||
61 | public: | |
62 | typedef std::pair<int64_t, bool> EdgePair; | |
63 | ||
64 | public: | |
65 | LogicSnapshot(std::shared_ptr<sigrok::Logic> logic, | |
66 | uint64_t expected_num_samples = 0); | |
67 | ||
68 | virtual ~LogicSnapshot(); | |
69 | ||
70 | void append_payload(std::shared_ptr<sigrok::Logic> logic); | |
71 | ||
72 | void get_samples(uint8_t *const data, | |
73 | int64_t start_sample, int64_t end_sample) const; | |
74 | ||
75 | private: | |
76 | uint64_t unpack_sample(const uint8_t *ptr) const; | |
77 | void pack_sample(uint8_t *ptr, uint64_t value); | |
78 | ||
79 | void reallocate_mipmap_level(MipMapLevel &m); | |
80 | ||
81 | void append_payload_to_mipmap(); | |
82 | ||
83 | uint64_t get_sample(uint64_t index) const; | |
84 | ||
85 | public: | |
86 | /** | |
87 | * Parses a logic data snapshot to generate a list of transitions | |
88 | * in a time interval to a given level of detail. | |
89 | * @param[out] edges The vector to place the edges into. | |
90 | * @param[in] start The start sample index. | |
91 | * @param[in] end The end sample index. | |
92 | * @param[in] min_length The minimum number of samples that | |
93 | * can be resolved at this level of detail. | |
94 | * @param[in] sig_index The index of the signal. | |
95 | **/ | |
96 | void get_subsampled_edges(std::vector<EdgePair> &edges, | |
97 | uint64_t start, uint64_t end, | |
98 | float min_length, int sig_index); | |
99 | ||
100 | private: | |
101 | uint64_t get_subsample(int level, uint64_t offset) const; | |
102 | ||
103 | static uint64_t pow2_ceil(uint64_t x, unsigned int power); | |
104 | ||
105 | private: | |
106 | struct MipMapLevel mip_map_[ScaleStepCount]; | |
107 | uint64_t last_append_sample_; | |
108 | ||
109 | friend struct LogicSnapshotTest::Pow2; | |
110 | friend struct LogicSnapshotTest::Basic; | |
111 | friend struct LogicSnapshotTest::LargeData; | |
112 | friend struct LogicSnapshotTest::Pulses; | |
113 | friend struct LogicSnapshotTest::LongPulses; | |
114 | }; | |
115 | ||
116 | } // namespace data | |
117 | } // namespace pv | |
118 | ||
119 | #endif // PULSEVIEW_PV_DATA_LOGICSNAPSHOT_H |