299 lines
9.0 KiB
C++
299 lines
9.0 KiB
C++
/* #define DEBUGTRACE_ENABLED */
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#include "arma_npy.h"
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#include "debugtrace.hpp"
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#include "lasp_clip.h"
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#include "lasp_daq.h"
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#include "lasp_daqdata.h"
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#include "lasp_ppm.h"
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#include "lasp_rtaps.h"
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#include "lasp_rtsignalviewer.h"
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#include "lasp_streammgr.h"
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#include "lasp_threadedindatahandler.h"
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#include <armadillo>
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#include <atomic>
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#include <chrono>
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#include <pybind11/pybind11.h>
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using namespace std::literals::chrono_literals;
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using std::cerr;
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using std::endl;
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namespace py = pybind11;
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/**
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* @brief Generate a Numpy array from daqdata, does *NOT* create a copy of the
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* data!. Instead, it shares the data from the DaqData container.
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*
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* @tparam T The type of the stored sample
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* @param d The daqdata to convert
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*
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* @return Numpy array
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*/
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template <typename T, bool copy = false>
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py::array_t<T> getPyArrayNoCpy(const DaqData &d) {
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// https://github.com/pybind/pybind11/issues/323
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//
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// When a valid object is passed as 'base', it tells pybind not to take
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// ownership of the data, because 'base' will own it. In fact 'packet' will
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// own it, but - psss! - , we don't tell it to pybind... Alos note that ANY
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// valid object is good for this purpose, so I choose "str"...
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py::str dummyDataOwner;
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/*
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* Signature:
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array_t(ShapeContainer shape,
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StridesContainer strides,
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const T *ptr = nullptr,
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handle base = handle());
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*/
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return py::array_t<T>(
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py::array::ShapeContainer({d.nframes, d.nchannels}), // Shape
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py::array::StridesContainer( // Strides
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{sizeof(T),
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sizeof(T) * d.nframes}), // Strides (in bytes) for each index
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reinterpret_cast<T *>(
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const_cast<DaqData &>(d).raw_ptr()), // Pointer to buffer
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dummyDataOwner // As stated above, now Numpy does not take ownership of
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// the data pointer.
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);
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}
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template <typename T, bool copy = false>
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py::array_t<d> dmat_to_ndarray(const DaqData &d) {
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// https://github.com/pybind/pybind11/issues/323
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//
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// When a valid object is passed as 'base', it tells pybind not to take
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// ownership of the data, because 'base' will own it. In fact 'packet' will
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// own it, but - psss! - , we don't tell it to pybind... Alos note that ANY
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// valid object is good for this purpose, so I choose "str"...
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py::str dummyDataOwner;
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/*
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* Signature:
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array_t(ShapeContainer shape,
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StridesContainer strides,
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const T *ptr = nullptr,
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handle base = handle());
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*/
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return py::array_t<T>(
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py::array::ShapeContainer({d.nframes, d.nchannels}), // Shape
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py::array::StridesContainer( // Strides
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{sizeof(T),
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sizeof(T) * d.nframes}), // Strides (in bytes) for each index
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reinterpret_cast<T *>(
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const_cast<DaqData &>(d).raw_ptr()), // Pointer to buffer
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dummyDataOwner // As stated above, now Numpy does not take ownership of
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// the data pointer.
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);
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}
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/**
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* @brief Wraps the ThreadedInDataHandler such that it calls a Python callback
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* with a buffer of sample data. Converts DaqData objects to Numpy arrays and
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* calls Python given as argument to the constructor
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*/
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class PyIndataHandler : public ThreadedInDataHandler<PyIndataHandler> {
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/**
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* @brief The callback functions that is called.
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*/
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py::function cb, reset_callback;
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public:
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/**
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* @brief Initialize PyIndataHandler
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*
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* @param mgr StreamMgr handle
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* @param cb Python callback that is called with Numpy input data from device
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* @param reset_callback Python callback that is called with a Daq pointer.
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* Careful: do not store this handle, as it is only valid as long as reset()
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* is called, when a stream stops, this pointer / handle will dangle.
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*/
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PyIndataHandler(SmgrHandle mgr, py::function cb, py::function reset_callback)
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: ThreadedInDataHandler(mgr), cb(cb), reset_callback(reset_callback) {
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DEBUGTRACE_ENTER;
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/// Start should be called externally, as at constructor time no virtual
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/// functions should be called.
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py::gil_scoped_release release;
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startThread();
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}
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~PyIndataHandler() {
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DEBUGTRACE_ENTER;
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/// Callback cannot be called, which results in a deadlock on the GIL
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/// without this release.
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py::gil_scoped_release release;
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stopThread();
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}
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/**
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* @brief Calls the reset callback in Python.
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*
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* @param daq Daq device, or nullptr in case no input stream is running.
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*/
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void reset(const Daq *daq) {
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DEBUGTRACE_ENTER;
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try {
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py::gil_scoped_acquire acquire;
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if (daq) {
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reset_callback(daq);
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} else {
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reset_callback(py::none());
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}
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} catch (py::error_already_set &e) {
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cerr << "*************** Error calling reset callback!\n";
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cerr << e.what() << endl;
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cerr << "*************** \n";
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/// Throwing a runtime error here does not work out one way or another.
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/// Therefore, it is better to dive out and prevent undefined behaviour
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abort();
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/* throw std::runtime_error(e.what()); */
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} catch (std::exception &e) {
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cerr << "Caught unknown exception in reset callback:" << e.what() << endl;
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abort();
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}
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}
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/**
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* @brief Calls the Python callback method / function with a Numpy array of
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* stream data.
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*/
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void inCallback(const DaqData &d) {
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/* DEBUGTRACE_ENTER; */
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using DataType = DataTypeDescriptor::DataType;
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try {
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py::gil_scoped_acquire acquire;
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py::object bool_val;
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switch (d.dtype) {
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case (DataType::dtype_int8): {
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bool_val = cb(getPyArrayNoCpy<int8_t>(d));
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} break;
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case (DataType::dtype_int16): {
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bool_val = cb(getPyArrayNoCpy<int16_t>(d));
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} break;
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case (DataType::dtype_int32): {
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bool_val = cb(getPyArrayNoCpy<int32_t>(d));
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} break;
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case (DataType::dtype_fl32): {
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bool_val = cb(getPyArrayNoCpy<float>(d));
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} break;
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case (DataType::dtype_fl64): {
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bool_val = cb(getPyArrayNoCpy<double>(d));
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} break;
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default:
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throw std::runtime_error("BUG");
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} // End of switch
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bool res = bool_val.cast<bool>();
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} catch (py::error_already_set &e) {
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cerr << "ERROR: Python raised exception from callback function: ";
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cerr << e.what() << endl;
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abort();
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} catch (py::cast_error &e) {
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cerr << e.what() << endl;
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cerr << "ERROR: Python callback does not return boolean value." << endl;
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abort();
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} catch (std::exception &e) {
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cerr << "Caught unknown exception in Python callback:" << e.what()
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<< endl;
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abort();
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}
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}
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};
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void init_datahandler(py::module &m) {
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/// The C++ class is PyIndataHandler, but for Python, it is called
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/// InDataHandler
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py::class_<PyIndataHandler> pyidh(m, "InDataHandler");
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pyidh.def(py::init<SmgrHandle, py::function, py::function>());
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/// Peak Programme Meter
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py::class_<PPMHandler> ppm(m, "PPMHandler");
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ppm.def(py::init<SmgrHandle, const d>());
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ppm.def(py::init<SmgrHandle>());
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ppm.def("getCurrentValue", [](const PPMHandler &ppm) {
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std::tuple<vd, arma::uvec> tp;
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{
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py::gil_scoped_release release;
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tp = ppm.getCurrentValue();
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}
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return py::make_tuple(ColToNpy<d>(std::get<0>(tp)),
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ColToNpy<arma::uword>(std::get<1>(tp)));
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});
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/// Clip Detector
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py::class_<ClipHandler> clip(m, "ClipHandler");
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clip.def(py::init<SmgrHandle>());
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clip.def("getCurrentValue", [](const ClipHandler &clip) {
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arma::uvec cval;
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{
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py::gil_scoped_release release;
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cval = clip.getCurrentValue();
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}
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return ColToNpy<arma::uword>(cval); // something goes wrong here
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});
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/// Real time Aps
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///
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py::class_<RtAps> rtaps(m, "RtAps");
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rtaps.def(py::init<SmgrHandle, // StreamMgr
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Filter *const, // FreqWeighting filter
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const us, // Nfft
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const Window::WindowType, // Window
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const d, // Overlap percentage 0<=o<100
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const d // Time constant
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>(),
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py::arg("streammgr"), // StreamMgr
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py::arg("preFilter").none(true),
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/// Below list of arguments *SHOULD* be same as for
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/// AvPowerSpectra constructor!
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py::arg("nfft") = 2048, //
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py::arg("windowType") = Window::WindowType::Hann, //
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py::arg("overlap_percentage") = 50.0, //
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py::arg("time_constant") = -1 //
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);
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rtaps.def("getCurrentValue", [](RtAps &rt) {
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ccube val;
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{
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py::gil_scoped_release release;
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val = rt.getCurrentValue();
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}
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return CubeToNpy<c>(val);
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});
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/// Real time Signal Viewer
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///
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py::class_<RtSignalViewer> rtsv(m, "RtSignalViewer");
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rtsv.def(py::init<SmgrHandle, // StreamMgr
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const d, // Time history
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const us, // Resolution
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const us // Channel number
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>());
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rtsv.def("getCurrentValue", [](RtSignalViewer &rt) {
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dmat val;
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{
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py::gil_scoped_release release;
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val = rt.getCurrentValue();
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}
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return MatToNpy<d>(val);
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});
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}
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