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1 | /* |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2020 Soeren Apel <soeren@apelpie.net> | |
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_MATHSIGNAL_HPP | |
21 | #define PULSEVIEW_PV_DATA_MATHSIGNAL_HPP | |
22 | ||
b0773a8a SA |
23 | #include <QString> |
24 | ||
4640a84e SA |
25 | #include <pv/exprtk.hpp> |
26 | #include <pv/util.hpp> | |
b0773a8a SA |
27 | #include <pv/data/analog.hpp> |
28 | #include <pv/data/signalbase.hpp> | |
b0773a8a | 29 | |
4640a84e SA |
30 | using std::atomic; |
31 | using std::condition_variable; | |
32 | using std::mutex; | |
b0773a8a SA |
33 | using std::shared_ptr; |
34 | ||
35 | namespace pv { | |
36 | class Session; | |
37 | ||
38 | namespace data { | |
39 | ||
40 | class SignalBase; | |
b0773a8a SA |
41 | |
42 | class MathSignal : public SignalBase | |
43 | { | |
44 | Q_OBJECT | |
4640a84e SA |
45 | Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed) |
46 | Q_PROPERTY(QString error_message READ error_message) | |
b0773a8a SA |
47 | |
48 | private: | |
49 | static const int64_t ChunkLength; | |
50 | ||
51 | public: | |
52 | MathSignal(pv::Session &session); | |
53 | virtual ~MathSignal(); | |
54 | ||
55 | virtual void save_settings(QSettings &settings) const; | |
56 | virtual void restore_settings(QSettings &settings); | |
57 | ||
4640a84e SA |
58 | QString error_message() const; |
59 | ||
60 | QString get_expression() const; | |
61 | void set_expression(QString expression); | |
62 | ||
63 | private: | |
64 | void set_error_message(QString msg); | |
65 | ||
66 | /** | |
67 | * Returns the number of samples that can be worked on, | |
68 | * i.e. the number of samples where samples are available | |
69 | * for all connected channels. | |
70 | * If the math signal uses no input channels, this is the | |
71 | * number of samples in the session. | |
72 | */ | |
73 | uint64_t get_working_sample_count(uint32_t segment_id) const; | |
74 | ||
75 | void reset_generation(); | |
76 | void begin_generation(); | |
77 | ||
78 | void generate_samples(uint32_t segment_id, const uint64_t start_sample, | |
79 | const int64_t sample_count); | |
80 | void generation_proc(); | |
81 | ||
b0773a8a SA |
82 | Q_SIGNALS: |
83 | void samples_cleared(); | |
84 | ||
85 | void samples_added(uint64_t segment_id, uint64_t start_sample, | |
86 | uint64_t end_sample); | |
87 | ||
88 | void min_max_changed(float min, float max); | |
89 | ||
4640a84e | 90 | void expression_changed(QString expression); |
b0773a8a | 91 | |
4640a84e SA |
92 | private Q_SLOTS: |
93 | void on_capture_state_changed(int state); | |
94 | void on_data_received(); | |
b0773a8a SA |
95 | |
96 | private: | |
97 | pv::Session &session_; | |
98 | ||
4640a84e SA |
99 | uint64_t custom_sample_rate_; |
100 | uint64_t custom_sample_count_; | |
101 | bool use_custom_sample_rate_, use_custom_sample_count_; | |
102 | vector< shared_ptr<SignalBase>> input_signals_; | |
103 | ||
104 | QString expression_; | |
105 | ||
b0773a8a | 106 | QString error_message_; |
4640a84e SA |
107 | |
108 | mutable mutex input_mutex_; | |
109 | mutable condition_variable gen_input_cond_; | |
110 | ||
111 | std::thread gen_thread_; | |
112 | atomic<bool> gen_interrupt_; | |
113 | ||
114 | exprtk::symbol_table<double> *exprtk_symbol_table_; | |
115 | exprtk::expression<double> *exprtk_expression_; | |
116 | exprtk::parser<double> *exprtk_parser_; | |
117 | double exprtk_current_time_, exprtk_current_sample_; | |
b0773a8a SA |
118 | }; |
119 | ||
120 | } // namespace data | |
121 | } // namespace pv | |
122 | ||
123 | #endif // PULSEVIEW_PV_DATA_MATHSIGNAL_HPP |