hyperion.ng/libsrc/effectengine/Effect.cpp

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// Python include
#include <Python.h>
// stl includes
#include <iostream>
#include <sstream>
// Qt includes
#include <QDateTime>
// effect engin eincludes
#include "Effect.h"
// Python method table
PyMethodDef Effect::effectMethods[] = {
{"setColor", Effect::wrapSetColor, METH_VARARGS, "Set a new color for the leds."},
{"setImage", Effect::wrapSetImage, METH_VARARGS, "Set a new image to process and determine new led colors."},
{"abort", Effect::wrapAbort, METH_NOARGS, "Check if the effect should abort execution."},
{NULL, NULL, 0, NULL}
};
#if PY_MAJOR_VERSION >= 3
// create the hyperion module
struct PyModuleDef Effect::moduleDef = {
PyModuleDef_HEAD_INIT,
"hyperion", /* m_name */
"Hyperion module", /* m_doc */
-1, /* m_size */
Effect::effectMethods, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
NULL, /* m_free */
};
PyObject* Effect::PyInit_hyperion()
{
return PyModule_Create(&moduleDef);
}
#else
void Effect::PyInit_hyperion()
{
Py_InitModule("hyperion", effectMethods);
}
#endif
void Effect::registerHyperionExtensionModule()
{
PyImport_AppendInittab("hyperion", &PyInit_hyperion);
}
Effect::Effect(PyThreadState * mainThreadState, int priority, int timeout, const std::string & script, const Json::Value & args) :
QThread(),
_mainThreadState(mainThreadState),
_priority(priority),
_timeout(timeout),
_script(script),
_args(args),
_endTime(-1),
_interpreterThreadState(nullptr),
_abortRequested(false),
_imageProcessor(ImageProcessorFactory::getInstance().newImageProcessor()),
_colors()
{
_colors.resize(_imageProcessor->getLedCount(), ColorRgb::BLACK);
// connect the finished signal
connect(this, SIGNAL(finished()), this, SLOT(effectFinished()));
}
Effect::~Effect()
{
}
void Effect::run()
{
// switch to the main thread state and acquire the GIL
PyEval_RestoreThread(_mainThreadState);
// Initialize a new thread state
_interpreterThreadState = Py_NewInterpreter();
// import the buildtin Hyperion module
PyObject * module = PyImport_ImportModule("hyperion");
// add a capsule containing 'this' to the module to be able to retrieve the effect from the callback function
PyObject_SetAttrString(module, "__effectObj", PyCapsule_New(this, nullptr, nullptr));
// add ledCount variable to the interpreter
PyObject_SetAttrString(module, "ledCount", Py_BuildValue("i", _imageProcessor->getLedCount()));
// add a args variable to the interpreter
PyObject_SetAttrString(module, "args", json2python(_args));
// decref the module
Py_XDECREF(module);
// Set the end time if applicable
if (_timeout > 0)
{
_endTime = QDateTime::currentMSecsSinceEpoch() + _timeout;
}
// Run the effect script
FILE* file = fopen(_script.c_str(), "r");
if (file != nullptr)
{
PyRun_SimpleFile(file, _script.c_str());
}
else
{
std::cerr << "Unable to open script file " << _script << std::endl;
}
// Clean up the thread state
Py_EndInterpreter(_interpreterThreadState);
_interpreterThreadState = nullptr;
PyEval_ReleaseLock();
}
int Effect::getPriority() const
{
return _priority;
}
bool Effect::isAbortRequested() const
{
return _abortRequested;
}
void Effect::abort()
{
_abortRequested = true;
}
void Effect::effectFinished()
{
emit effectFinished(this);
}
PyObject *Effect::json2python(const Json::Value &json) const
{
switch (json.type())
{
case Json::nullValue:
return Py_BuildValue("");
case Json::realValue:
return Py_BuildValue("d", json.asDouble());
case Json::intValue:
case Json::uintValue:
return Py_BuildValue("i", json.asInt());
case Json::booleanValue:
return Py_BuildValue("i", json.asBool() ? 1 : 0);
case Json::stringValue:
return Py_BuildValue("s", json.asCString());
case Json::objectValue:
{
PyObject * dict= PyDict_New();
for (Json::Value::iterator i = json.begin(); i != json.end(); ++i)
{
PyObject * obj = json2python(*i);
PyDict_SetItemString(dict, i.memberName(), obj);
Py_XDECREF(obj);
}
return dict;
}
case Json::arrayValue:
{
PyObject * list = PyList_New(json.size());
for (Json::Value::iterator i = json.begin(); i != json.end(); ++i)
{
PyObject * obj = json2python(*i);
PyList_SetItem(list, i.index(), obj);
Py_XDECREF(obj);
}
return list;
}
}
assert(false);
return nullptr;
}
PyObject* Effect::wrapSetColor(PyObject *self, PyObject *args)
{
// get the effect
Effect * effect = getEffect();
// check if we have aborted already
if (effect->_abortRequested)
{
return Py_BuildValue("");
}
// determine the timeout
int timeout = effect->_timeout;
if (timeout > 0)
{
timeout = effect->_endTime - QDateTime::currentMSecsSinceEpoch();
// we are done if the time has passed
if (timeout <= 0)
{
return Py_BuildValue("");
}
}
// check the number of arguments
int argCount = PyTuple_Size(args);
if (argCount == 3)
{
// three seperate arguments for red, green, and blue
ColorRgb color;
if (PyArg_ParseTuple(args, "bbb", &color.red, &color.green, &color.blue))
{
std::fill(effect->_colors.begin(), effect->_colors.end(), color);
effect->setColors(effect->_priority, effect->_colors, timeout, false);
return Py_BuildValue("");
}
else
{
return nullptr;
}
}
else if (argCount == 1)
{
// bytearray of values
PyObject * bytearray = nullptr;
if (PyArg_ParseTuple(args, "O", &bytearray))
{
if (PyByteArray_Check(bytearray))
{
size_t length = PyByteArray_Size(bytearray);
if (length == 3 * effect->_imageProcessor->getLedCount())
{
char * data = PyByteArray_AS_STRING(bytearray);
memcpy(effect->_colors.data(), data, length);
effect->setColors(effect->_priority, effect->_colors, timeout, false);
return Py_BuildValue("");
}
else
{
PyErr_SetString(PyExc_RuntimeError, "Length of bytearray argument should be 3*ledCount");
return nullptr;
}
}
else
{
PyErr_SetString(PyExc_RuntimeError, "Argument is not a bytearray");
return nullptr;
}
}
else
{
return nullptr;
}
}
else
{
PyErr_SetString(PyExc_RuntimeError, "Function expect 1 or 3 arguments");
return nullptr;
}
// error
PyErr_SetString(PyExc_RuntimeError, "Unknown error");
return nullptr;
}
PyObject* Effect::wrapSetImage(PyObject *self, PyObject *args)
{
// get the effect
Effect * effect = getEffect();
// check if we have aborted already
if (effect->_abortRequested)
{
return Py_BuildValue("");
}
// determine the timeout
int timeout = effect->_timeout;
if (timeout > 0)
{
timeout = effect->_endTime - QDateTime::currentMSecsSinceEpoch();
// we are done if the time has passed
if (timeout <= 0)
{
return Py_BuildValue("");
}
}
// bytearray of values
int width, height;
PyObject * bytearray = nullptr;
if (PyArg_ParseTuple(args, "iiO", &width, &height, &bytearray))
{
if (PyByteArray_Check(bytearray))
{
int length = PyByteArray_Size(bytearray);
if (length == 3 * width * height)
{
Image<ColorRgb> image(width, height);
char * data = PyByteArray_AS_STRING(bytearray);
memcpy(image.memptr(), data, length);
effect->_imageProcessor->process(image, effect->_colors);
effect->setColors(effect->_priority, effect->_colors, timeout, false);
return Py_BuildValue("");
}
else
{
PyErr_SetString(PyExc_RuntimeError, "Length of bytearray argument should be 3*ledCount");
return nullptr;
}
}
else
{
PyErr_SetString(PyExc_RuntimeError, "Argument 3 is not a bytearray");
return nullptr;
}
}
else
{
return nullptr;
}
// error
PyErr_SetString(PyExc_RuntimeError, "Unknown error");
return nullptr;
}
PyObject* Effect::wrapAbort(PyObject *self, PyObject *)
{
Effect * effect = getEffect();
// Test if the effect has reached it end time
if (effect->_timeout > 0 && QDateTime::currentMSecsSinceEpoch() > effect->_endTime)
{
effect->_abortRequested = true;
}
return Py_BuildValue("i", effect->_abortRequested ? 1 : 0);
}
Effect * Effect::getEffect()
{
// extract the module from the runtime
PyObject * module = PyObject_GetAttrString(PyImport_AddModule("__main__"), "hyperion");
if (!PyModule_Check(module))
{
// something is wrong
Py_XDECREF(module);
std::cerr << "Unable to retrieve the effect object from the Python runtime" << std::endl;
return nullptr;
}
// retrieve the capsule with the effect
PyObject * effectCapsule = PyObject_GetAttrString(module, "__effectObj");
Py_XDECREF(module);
if (!PyCapsule_CheckExact(effectCapsule))
{
// something is wrong
Py_XDECREF(effectCapsule);
std::cerr << "Unable to retrieve the effect object from the Python runtime" << std::endl;
return nullptr;
}
// Get the effect from the capsule
Effect * effect = reinterpret_cast<Effect *>(PyCapsule_GetPointer(effectCapsule, nullptr));
Py_XDECREF(effectCapsule);
return effect;
}