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1 | /* | |
2 | * This file is part of the sigrok 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 | #include "datasnapshot.h" | |
22 | ||
23 | #include <utility> | |
24 | #include <vector> | |
25 | ||
26 | namespace LogicDataSnapshotTest { | |
27 | class Pow2; | |
28 | class Basic; | |
29 | class LargeData; | |
30 | class Pulses; | |
31 | class LongPulses; | |
32 | } | |
33 | ||
34 | class LogicDataSnapshot : public DataSnapshot | |
35 | { | |
36 | private: | |
37 | struct MipMapLevel | |
38 | { | |
39 | uint64_t length; | |
40 | uint64_t data_length; | |
41 | void *data; | |
42 | }; | |
43 | ||
44 | private: | |
45 | static const int ScaleStepCount = 10; | |
46 | static const int MipMapScalePower; | |
47 | static const int MipMapScaleFactor; | |
48 | static const float LogMipMapScaleFactor; | |
49 | static const uint64_t MipMapDataUnit; | |
50 | ||
51 | public: | |
52 | typedef std::pair<int64_t, bool> EdgePair; | |
53 | ||
54 | public: | |
55 | LogicDataSnapshot(const sr_datafeed_logic &logic); | |
56 | ||
57 | virtual ~LogicDataSnapshot(); | |
58 | ||
59 | void append_payload(const sr_datafeed_logic &logic); | |
60 | ||
61 | private: | |
62 | void reallocate_mip_map(MipMapLevel &m); | |
63 | ||
64 | void append_payload_to_mipmap(); | |
65 | ||
66 | public: | |
67 | uint64_t get_sample(uint64_t index) const; | |
68 | ||
69 | /** | |
70 | * Parses a logic data snapshot to generate a list of transitions | |
71 | * in a time interval to a given level of detail. | |
72 | * @param[out] edges The vector to place the edges into. | |
73 | * @param[in] start The start sample index. | |
74 | * @param[in] end The end sample index. | |
75 | * @param[in] min_length The minimum number of samples that | |
76 | * can be resolved at this level of detail. | |
77 | * @param[in] sig_index The index of the signal. | |
78 | **/ | |
79 | void get_subsampled_edges(std::vector<EdgePair> &edges, | |
80 | int64_t start, int64_t end, | |
81 | float min_length, int sig_index); | |
82 | ||
83 | private: | |
84 | uint64_t get_subsample(int level, uint64_t offset) const; | |
85 | ||
86 | static int64_t pow2_ceil(int64_t x, unsigned int power); | |
87 | ||
88 | private: | |
89 | struct MipMapLevel _mip_map[ScaleStepCount]; | |
90 | uint64_t _last_append_sample; | |
91 | ||
92 | friend class LogicDataSnapshotTest::Pow2; | |
93 | friend class LogicDataSnapshotTest::Basic; | |
94 | friend class LogicDataSnapshotTest::LargeData; | |
95 | friend class LogicDataSnapshotTest::Pulses; | |
96 | friend class LogicDataSnapshotTest::LongPulses; | |
97 | }; |