hyperion.ng/libsrc/effectengine/EffectEngine.cpp

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// Python includes
#include <Python.h>
// Stl includes
#include <fstream>
// Qt includes
#include <QResource>
#include <QMetaType>
#include <QFile>
#include <QDir>
// hyperion util includes
#include <utils/jsonschema/JsonSchemaChecker.h>
// effect engine includes
#include <effectengine/EffectEngine.h>
#include "Effect.h"
EffectEngine::EffectEngine(Hyperion * hyperion, const Json::Value & jsonEffectConfig) :
_hyperion(hyperion),
_availableEffects(),
_activeEffects(),
_mainThreadState(nullptr)
{
qRegisterMetaType<std::vector<ColorRgb>>("std::vector<ColorRgb>");
// connect the Hyperion channel clear feedback
connect(_hyperion, SIGNAL(channelCleared(int)), this, SLOT(channelCleared(int)));
connect(_hyperion, SIGNAL(allChannelsCleared()), this, SLOT(allChannelsCleared()));
// read all effects
const Json::Value & paths = jsonEffectConfig["paths"];
for (Json::UInt i = 0; i < paths.size(); ++i)
{
const std::string & path = paths[i].asString();
QDir directory(QString::fromStdString(path));
if (!directory.exists())
{
std::cerr << "Effect directory can not be loaded: " << path << std::endl;
continue;
}
QStringList filenames = directory.entryList(QStringList() << "*.json", QDir::Files, QDir::Name | QDir::IgnoreCase);
foreach (const QString & filename, filenames)
{
EffectDefinition def;
if (loadEffectDefinition(path, filename.toStdString(), def))
{
_availableEffects.push_back(def);
}
}
}
// initialize the python interpreter
std::cout << "Initializing Python interpreter" << std::endl;
Py_InitializeEx(0);
PyEval_InitThreads(); // Create the GIL
_mainThreadState = PyEval_SaveThread();
}
EffectEngine::~EffectEngine()
{
// clean up the Python interpreter
std::cout << "Cleaning up Python interpreter" << std::endl;
PyEval_RestoreThread(_mainThreadState);
Py_Finalize();
}
const std::list<EffectDefinition> &EffectEngine::getEffects() const
{
return _availableEffects;
}
bool EffectEngine::loadEffectDefinition(const std::string &path, const std::string &effectConfigFile, EffectDefinition & effectDefinition)
{
std::string fileName = path + QDir::separator().toAscii() + effectConfigFile;
std::ifstream file(fileName.c_str());
if (!file.is_open())
{
std::cerr << "Effect file '" << fileName << "' could not be loaded" << std::endl;
return false;
}
// Read the json config file
Json::Reader jsonReader;
Json::Value config;
if (!jsonReader.parse(file, config, false))
{
std::cerr << "Error while reading effect '" << fileName << "': " << jsonReader.getFormattedErrorMessages() << std::endl;
return false;
}
// Read the json schema file
QResource schemaData(":effect-schema");
JsonSchemaChecker schemaChecker;
Json::Value schema;
Json::Reader().parse(reinterpret_cast<const char *>(schemaData.data()), reinterpret_cast<const char *>(schemaData.data()) + schemaData.size(), schema, false);
schemaChecker.setSchema(schema);
if (!schemaChecker.validate(config))
{
const std::list<std::string> & errors = schemaChecker.getMessages();
foreach (const std::string & error, errors) {
std::cerr << "Error while checking '" << fileName << "':" << error << std::endl;
}
return false;
}
// setup the definition
effectDefinition.name = config["name"].asString();
effectDefinition.script = path + QDir::separator().toAscii() + config["script"].asString();
effectDefinition.args = config["args"];
// return succes
std::cout << "Effect loaded: " + effectDefinition.name << std::endl;
return true;
}
int EffectEngine::runEffect(const std::string &effectName, int priority, int timeout)
{
return runEffect(effectName, Json::Value(Json::nullValue), priority, timeout);
}
int EffectEngine::runEffect(const std::string &effectName, const Json::Value &args, int priority, int timeout)
{
std::cout << "run effect " << effectName << " on channel " << priority << std::endl;
const EffectDefinition * effectDefinition = nullptr;
for (const EffectDefinition & e : _availableEffects)
{
if (e.name == effectName)
{
effectDefinition = &e;
break;
}
}
if (effectDefinition == nullptr)
{
// no such effect
std::cerr << "effect " << effectName << " not found" << std::endl;
return -1;
}
return runEffectScript(effectDefinition->script, args.isNull() ? effectDefinition->args : args, priority, timeout);
}
int EffectEngine::runEffectScript(const std::string &script, const Json::Value &args, int priority, int timeout)
{
// clear current effect on the channel
channelCleared(priority);
// create the effect
Effect * effect = new Effect(priority, timeout, script, args);
connect(effect, SIGNAL(setColors(int,std::vector<ColorRgb>,int,bool)), _hyperion, SLOT(setColors(int,std::vector<ColorRgb>,int,bool)), Qt::QueuedConnection);
connect(effect, SIGNAL(effectFinished(Effect*)), this, SLOT(effectFinished(Effect*)));
_activeEffects.push_back(effect);
// start the effect
effect->start();
return 0;
}
void EffectEngine::channelCleared(int priority)
{
for (Effect * effect : _activeEffects)
{
if (effect->getPriority() == priority)
{
effect->abort();
}
}
}
void EffectEngine::allChannelsCleared()
{
for (Effect * effect : _activeEffects)
{
effect->abort();
}
}
void EffectEngine::effectFinished(Effect *effect)
{
if (!effect->isAbortRequested())
{
// effect stopped by itself. Clear the channel
_hyperion->clear(effect->getPriority());
}
std::cout << "effect finished" << std::endl;
for (auto effectIt = _activeEffects.begin(); effectIt != _activeEffects.end(); ++effectIt)
{
if (*effectIt == effect)
{
_activeEffects.erase(effectIt);
break;
}
}
// cleanup the effect
effect->deleteLater();
}