2 * This file is part of the PulseView project.
4 * Copyright (C) 2020 Soeren Apel <soeren@apelpie.net>
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.
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.
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/>.
20 #ifndef PULSEVIEW_PV_DATA_MATHSIGNAL_HPP
21 #define PULSEVIEW_PV_DATA_MATHSIGNAL_HPP
23 #define exprtk_disable_rtl_io_file /* Potential security issue, doubt anyone would use those anyway */
24 #define exprtk_disable_rtl_vecops /* Vector ops are rather useless for math channels */
25 #define exprtk_disable_caseinsensitivity /* So that we can have both 't' and 'T' */
31 #include <pv/exprtk.hpp>
32 #include <pv/util.hpp>
33 #include <pv/data/analog.hpp>
34 #include <pv/data/signalbase.hpp>
37 using std::condition_variable;
39 using std::numeric_limits;
40 using std::shared_ptr;
53 signal_data(const shared_ptr<SignalBase> _sb) :
54 sb(_sb), sample_num(numeric_limits<uint64_t>::max()), sample_value(0), ref(nullptr)
57 const shared_ptr<SignalBase> sb;
63 class MathSignal : public SignalBase
66 Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed)
69 static const int64_t ChunkLength;
72 MathSignal(pv::Session &session);
73 virtual ~MathSignal();
75 virtual void save_settings(QSettings &settings) const;
76 virtual void restore_settings(QSettings &settings);
78 QString get_expression() const;
79 void set_expression(QString expression);
82 void set_error(uint8_t type, QString msg);
85 * Returns the number of samples that can be worked on,
86 * i.e. the number of samples where samples are available
87 * for all connected channels.
88 * If the math signal uses no input channels, this is the
89 * number of samples in the session.
91 uint64_t get_working_sample_count(uint32_t segment_id) const;
93 void update_completeness(uint32_t segment_id, uint64_t output_sample_count);
95 void reset_generation();
96 virtual void begin_generation();
98 uint64_t generate_samples(uint32_t segment_id, const uint64_t start_sample,
99 const int64_t sample_count);
100 void generation_proc();
102 signal_data* signal_from_name(const std::string& name);
103 void update_signal_sample(signal_data* sig_data, uint32_t segment_id, uint64_t sample_num);
105 bool all_input_signals_enabled(QString &disabled_signals) const;
108 void samples_cleared();
110 void samples_added(uint64_t segment_id, uint64_t start_sample,
111 uint64_t end_sample);
113 void min_max_changed(float min, float max);
115 void expression_changed(QString expression);
118 void on_capture_state_changed(int state);
119 void on_data_received();
121 void on_enabled_changed();
124 pv::Session &session_;
126 uint64_t custom_sample_rate_;
127 uint64_t custom_sample_count_;
128 bool use_custom_sample_rate_, use_custom_sample_count_;
129 uint64_t generation_chunk_size_;
130 map<std::string, signal_data> input_signals_;
136 mutable mutex input_mutex_;
137 mutable condition_variable gen_input_cond_;
139 std::thread gen_thread_;
140 atomic<bool> gen_interrupt_;
142 exprtk::symbol_table<double> *exprtk_unknown_symbol_table_, *exprtk_symbol_table_;
143 exprtk::expression<double> *exprtk_expression_;
144 exprtk::parser<double> *exprtk_parser_;
145 double exprtk_current_time_, exprtk_current_sample_;
147 fnc_sample<double>* fnc_sample_;
149 // Give sig_sample access to the private helper functions
150 friend struct fnc_sample<double>;
156 #endif // PULSEVIEW_PV_DATA_MATHSIGNAL_HPP