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b0773a8a SA |
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 | ||
3f1f6295 SA |
23 | #include <limits> |
24 | ||
b0773a8a SA |
25 | #include <QString> |
26 | ||
4640a84e SA |
27 | #include <pv/exprtk.hpp> |
28 | #include <pv/util.hpp> | |
b0773a8a SA |
29 | #include <pv/data/analog.hpp> |
30 | #include <pv/data/signalbase.hpp> | |
b0773a8a | 31 | |
4640a84e SA |
32 | using std::atomic; |
33 | using std::condition_variable; | |
34 | using std::mutex; | |
3f1f6295 | 35 | using std::numeric_limits; |
b0773a8a SA |
36 | using std::shared_ptr; |
37 | ||
38 | namespace pv { | |
39 | class Session; | |
40 | ||
41 | namespace data { | |
42 | ||
43 | class SignalBase; | |
b0773a8a | 44 | |
3f1f6295 SA |
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 | ||
b0773a8a SA |
59 | class MathSignal : public SignalBase |
60 | { | |
61 | Q_OBJECT | |
4640a84e SA |
62 | Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed) |
63 | Q_PROPERTY(QString error_message READ error_message) | |
b0773a8a SA |
64 | |
65 | private: | |
66 | static const int64_t ChunkLength; | |
67 | ||
68 | public: | |
69 | MathSignal(pv::Session &session); | |
70 | virtual ~MathSignal(); | |
71 | ||
72 | virtual void save_settings(QSettings &settings) const; | |
73 | virtual void restore_settings(QSettings &settings); | |
74 | ||
4640a84e SA |
75 | QString error_message() const; |
76 | ||
77 | QString get_expression() const; | |
78 | void set_expression(QString expression); | |
79 | ||
80 | private: | |
81 | void set_error_message(QString msg); | |
82 | ||
83 | /** | |
84 | * Returns the number of samples that can be worked on, | |
85 | * i.e. the number of samples where samples are available | |
86 | * for all connected channels. | |
87 | * If the math signal uses no input channels, this is the | |
88 | * number of samples in the session. | |
89 | */ | |
90 | uint64_t get_working_sample_count(uint32_t segment_id) const; | |
91 | ||
144e72c9 | 92 | void update_completeness(uint32_t segment_id, uint64_t output_sample_count); |
bee54d9e | 93 | |
4640a84e SA |
94 | void reset_generation(); |
95 | void begin_generation(); | |
96 | ||
97 | void generate_samples(uint32_t segment_id, const uint64_t start_sample, | |
98 | const int64_t sample_count); | |
99 | void generation_proc(); | |
100 | ||
3f1f6295 SA |
101 | signal_data* signal_from_name(const std::string& name); |
102 | void update_signal_sample(signal_data* sig_data, uint32_t segment_id, uint64_t sample_num); | |
103 | ||
b0773a8a SA |
104 | Q_SIGNALS: |
105 | void samples_cleared(); | |
106 | ||
107 | void samples_added(uint64_t segment_id, uint64_t start_sample, | |
108 | uint64_t end_sample); | |
109 | ||
110 | void min_max_changed(float min, float max); | |
111 | ||
4640a84e | 112 | void expression_changed(QString expression); |
b0773a8a | 113 | |
4640a84e SA |
114 | private Q_SLOTS: |
115 | void on_capture_state_changed(int state); | |
116 | void on_data_received(); | |
b0773a8a SA |
117 | |
118 | private: | |
119 | pv::Session &session_; | |
120 | ||
4640a84e SA |
121 | uint64_t custom_sample_rate_; |
122 | uint64_t custom_sample_count_; | |
123 | bool use_custom_sample_rate_, use_custom_sample_count_; | |
3f1f6295 | 124 | map<std::string, signal_data> input_signals_; |
4640a84e | 125 | |
3f1f6295 | 126 | QString expression_, error_message_; |
4640a84e SA |
127 | |
128 | mutable mutex input_mutex_; | |
129 | mutable condition_variable gen_input_cond_; | |
130 | ||
131 | std::thread gen_thread_; | |
132 | atomic<bool> gen_interrupt_; | |
133 | ||
3f1f6295 | 134 | exprtk::symbol_table<double> *exprtk_unknown_symbol_table_, *exprtk_symbol_table_; |
4640a84e SA |
135 | exprtk::expression<double> *exprtk_expression_; |
136 | exprtk::parser<double> *exprtk_parser_; | |
137 | double exprtk_current_time_, exprtk_current_sample_; | |
3f1f6295 SA |
138 | |
139 | sig_sample<double>* fnc_sig_sample_; | |
140 | ||
141 | // Give sig_sample access to the private helper functions | |
142 | friend struct sig_sample<double>; | |
b0773a8a SA |
143 | }; |
144 | ||
145 | } // namespace data | |
146 | } // namespace pv | |
147 | ||
148 | #endif // PULSEVIEW_PV_DATA_MATHSIGNAL_HPP |