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
27 #include <pv/exprtk.hpp>
28 #include <pv/util.hpp>
29 #include <pv/data/analog.hpp>
30 #include <pv/data/signalbase.hpp>
33 using std::condition_variable;
35 using std::numeric_limits;
36 using std::shared_ptr;
49 signal_data(const shared_ptr<SignalBase> _sb) :
50 sb(_sb), sample_num(numeric_limits<uint64_t>::max()), sample_value(0), ref(nullptr)
53 const shared_ptr<SignalBase> sb;
59 class MathSignal : public SignalBase
62 Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed)
63 Q_PROPERTY(QString error_message READ error_message)
66 static const int64_t ChunkLength;
69 MathSignal(pv::Session &session);
70 virtual ~MathSignal();
72 virtual void save_settings(QSettings &settings) const;
73 virtual void restore_settings(QSettings &settings);
75 QString error_message() const;
77 QString get_expression() const;
78 void set_expression(QString expression);
81 void set_error_message(QString msg);
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.
90 uint64_t get_working_sample_count(uint32_t segment_id) const;
92 void update_completeness(uint32_t segment_id);
94 void reset_generation();
95 void begin_generation();
97 void generate_samples(uint32_t segment_id, const uint64_t start_sample,
98 const int64_t sample_count);
99 void generation_proc();
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);
105 void samples_cleared();
107 void samples_added(uint64_t segment_id, uint64_t start_sample,
108 uint64_t end_sample);
110 void min_max_changed(float min, float max);
112 void expression_changed(QString expression);
115 void on_capture_state_changed(int state);
116 void on_data_received();
119 pv::Session &session_;
121 uint64_t custom_sample_rate_;
122 uint64_t custom_sample_count_;
123 bool use_custom_sample_rate_, use_custom_sample_count_;
124 map<std::string, signal_data> input_signals_;
126 QString expression_, error_message_;
128 mutable mutex input_mutex_;
129 mutable condition_variable gen_input_cond_;
131 std::thread gen_thread_;
132 atomic<bool> gen_interrupt_;
134 exprtk::symbol_table<double> *exprtk_unknown_symbol_table_, *exprtk_symbol_table_;
135 exprtk::expression<double> *exprtk_expression_;
136 exprtk::parser<double> *exprtk_parser_;
137 double exprtk_current_time_, exprtk_current_sample_;
139 sig_sample<double>* fnc_sig_sample_;
141 // Give sig_sample access to the private helper functions
142 friend struct sig_sample<double>;
148 #endif // PULSEVIEW_PV_DATA_MATHSIGNAL_HPP