#ifndef PULSEVIEW_PV_DATA_MATHSIGNAL_HPP
#define PULSEVIEW_PV_DATA_MATHSIGNAL_HPP
-#include <QSettings>
#include <QString>
+#include <pv/exprtk.hpp>
+#include <pv/util.hpp>
#include <pv/data/analog.hpp>
#include <pv/data/signalbase.hpp>
-#include <pv/util.hpp>
+using std::atomic;
+using std::condition_variable;
+using std::mutex;
using std::shared_ptr;
namespace pv {
namespace data {
class SignalBase;
-class SignalData;
class MathSignal : public SignalBase
{
Q_OBJECT
+ Q_PROPERTY(QString expression READ get_expression WRITE set_expression NOTIFY expression_changed)
+ Q_PROPERTY(QString error_message READ error_message)
private:
static const int64_t ChunkLength;
virtual void save_settings(QSettings &settings) const;
virtual void restore_settings(QSettings &settings);
+ QString error_message() const;
+
+ QString get_expression() const;
+ void set_expression(QString expression);
+
+private:
+ void set_error_message(QString msg);
+
+ /**
+ * Returns the number of samples that can be worked on,
+ * i.e. the number of samples where samples are available
+ * for all connected channels.
+ * If the math signal uses no input channels, this is the
+ * number of samples in the session.
+ */
+ uint64_t get_working_sample_count(uint32_t segment_id) const;
+
+ void reset_generation();
+ void begin_generation();
+
+ void generate_samples(uint32_t segment_id, const uint64_t start_sample,
+ const int64_t sample_count);
+ void generation_proc();
+
Q_SIGNALS:
void samples_cleared();
void min_max_changed(float min, float max);
-//private Q_SLOTS:
-// void on_data_cleared();
-// void on_data_received();
-
-// void on_samples_added(SharedPtrToSegment segment, uint64_t start_sample,
-// uint64_t end_sample);
+ void expression_changed(QString expression);
-// void on_min_max_changed(float min, float max);
+private Q_SLOTS:
+ void on_capture_state_changed(int state);
+ void on_data_received();
private:
pv::Session &session_;
+ uint64_t custom_sample_rate_;
+ uint64_t custom_sample_count_;
+ bool use_custom_sample_rate_, use_custom_sample_count_;
+ vector< shared_ptr<SignalBase>> input_signals_;
+
+ QString expression_;
+
QString error_message_;
+
+ mutable mutex input_mutex_;
+ mutable condition_variable gen_input_cond_;
+
+ std::thread gen_thread_;
+ atomic<bool> gen_interrupt_;
+
+ exprtk::symbol_table<double> *exprtk_symbol_table_;
+ exprtk::expression<double> *exprtk_expression_;
+ exprtk::parser<double> *exprtk_parser_;
+ double exprtk_current_time_, exprtk_current_sample_;
};
} // namespace data