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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 | ||
23 | #include <limits> | |
24 | ||
25 | #include <QString> | |
26 | ||
27 | #include <pv/exprtk.hpp> | |
28 | #include <pv/util.hpp> | |
29 | #include <pv/data/analog.hpp> | |
30 | #include <pv/data/signalbase.hpp> | |
31 | ||
32 | using std::atomic; | |
33 | using std::condition_variable; | |
34 | using std::mutex; | |
35 | using std::numeric_limits; | |
36 | using std::shared_ptr; | |
37 | ||
38 | namespace pv { | |
39 | class Session; | |
40 | ||
41 | namespace data { | |
42 | ||
43 | class SignalBase; | |
44 | ||
45 | template<typename T> | |
46 | struct sig_sample; | |
47 | ||
48 | struct signal_data { | |
49 | signal_data(const shared_ptr<SignalBase> _sb) : | |
50 | sb(_sb), sample_num(numeric_limits<uint64_t>::max()), sample_value(0), ref(nullptr) | |
51 | {} | |
52 | ||
53 | const shared_ptr<SignalBase> sb; | |
54 | uint64_t sample_num; | |
55 | double sample_value; | |
56 | double* ref; | |
57 | }; | |
58 | ||
59 | class MathSignal : public SignalBase | |
60 | { | |
61 | Q_OBJECT | |
62 | Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed) | |
63 | ||
64 | private: | |
65 | static const int64_t ChunkLength; | |
66 | ||
67 | public: | |
68 | MathSignal(pv::Session &session); | |
69 | virtual ~MathSignal(); | |
70 | ||
71 | virtual void save_settings(QSettings &settings) const; | |
72 | virtual void restore_settings(QSettings &settings); | |
73 | ||
74 | QString get_expression() const; | |
75 | void set_expression(QString expression); | |
76 | ||
77 | private: | |
78 | virtual void set_error_message(QString msg); | |
79 | ||
80 | /** | |
81 | * Returns the number of samples that can be worked on, | |
82 | * i.e. the number of samples where samples are available | |
83 | * for all connected channels. | |
84 | * If the math signal uses no input channels, this is the | |
85 | * number of samples in the session. | |
86 | */ | |
87 | uint64_t get_working_sample_count(uint32_t segment_id) const; | |
88 | ||
89 | void update_completeness(uint32_t segment_id, uint64_t output_sample_count); | |
90 | ||
91 | void reset_generation(); | |
92 | void begin_generation(); | |
93 | ||
94 | void generate_samples(uint32_t segment_id, const uint64_t start_sample, | |
95 | const int64_t sample_count); | |
96 | void generation_proc(); | |
97 | ||
98 | signal_data* signal_from_name(const std::string& name); | |
99 | void update_signal_sample(signal_data* sig_data, uint32_t segment_id, uint64_t sample_num); | |
100 | ||
101 | Q_SIGNALS: | |
102 | void samples_cleared(); | |
103 | ||
104 | void samples_added(uint64_t segment_id, uint64_t start_sample, | |
105 | uint64_t end_sample); | |
106 | ||
107 | void min_max_changed(float min, float max); | |
108 | ||
109 | void expression_changed(QString expression); | |
110 | ||
111 | private Q_SLOTS: | |
112 | void on_capture_state_changed(int state); | |
113 | void on_data_received(); | |
114 | ||
115 | private: | |
116 | pv::Session &session_; | |
117 | ||
118 | uint64_t custom_sample_rate_; | |
119 | uint64_t custom_sample_count_; | |
120 | bool use_custom_sample_rate_, use_custom_sample_count_; | |
121 | map<std::string, signal_data> input_signals_; | |
122 | ||
123 | QString expression_; | |
124 | ||
125 | mutable mutex input_mutex_; | |
126 | mutable condition_variable gen_input_cond_; | |
127 | ||
128 | std::thread gen_thread_; | |
129 | atomic<bool> gen_interrupt_; | |
130 | ||
131 | exprtk::symbol_table<double> *exprtk_unknown_symbol_table_, *exprtk_symbol_table_; | |
132 | exprtk::expression<double> *exprtk_expression_; | |
133 | exprtk::parser<double> *exprtk_parser_; | |
134 | double exprtk_current_time_, exprtk_current_sample_; | |
135 | ||
136 | sig_sample<double>* fnc_sig_sample_; | |
137 | ||
138 | // Give sig_sample access to the private helper functions | |
139 | friend struct sig_sample<double>; | |
140 | }; | |
141 | ||
142 | } // namespace data | |
143 | } // namespace pv | |
144 | ||
145 | #endif // PULSEVIEW_PV_DATA_MATHSIGNAL_HPP |