fazekasgy@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
fazekasgy@0: 
fazekasgy@0: /*
fazekasgy@0:     Vamp
fazekasgy@0: 
fazekasgy@0:     An API for audio analysis and feature extraction plugins.
fazekasgy@0: 
fazekasgy@0:     Centre for Digital Music, Queen Mary, University of London.
fazekasgy@0:     Copyright 2006 Chris Cannam.
fazekasgy@0:   
fazekasgy@0:     Permission is hereby granted, free of charge, to any person
fazekasgy@0:     obtaining a copy of this software and associated documentation
fazekasgy@0:     files (the "Software"), to deal in the Software without
fazekasgy@0:     restriction, including without limitation the rights to use, copy,
fazekasgy@0:     modify, merge, publish, distribute, sublicense, and/or sell copies
fazekasgy@0:     of the Software, and to permit persons to whom the Software is
fazekasgy@0:     furnished to do so, subject to the following conditions:
fazekasgy@0: 
fazekasgy@0:     The above copyright notice and this permission notice shall be
fazekasgy@0:     included in all copies or substantial portions of the Software.
fazekasgy@0: 
fazekasgy@0:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
fazekasgy@0:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
fazekasgy@0:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
fazekasgy@0:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
fazekasgy@0:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
fazekasgy@0:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
fazekasgy@0:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
fazekasgy@0: 
fazekasgy@0:     Except as contained in this notice, the names of the Centre for
fazekasgy@0:     Digital Music; Queen Mary, University of London; and Chris Cannam
fazekasgy@0:     shall not be used in advertising or otherwise to promote the sale,
fazekasgy@0:     use or other dealings in this Software without prior written
fazekasgy@0:     authorization.
fazekasgy@0: */
fazekasgy@0: 
fazekasgy@0: /**
cannam@7:  * This Vamp plugin is a wrapper for Python Scripts. (VamPy)
fazekasgy@0:  * Centre for Digital Music, Queen Mary, University of London.
fazekasgy@0:  * Copyright 2008, George Fazekas.
fazekasgy@0: */
fazekasgy@0: 
cannam@3: #include <Python.h>
fazekasgy@0: #include "vamp/vamp.h"
fazekasgy@0: #include "vamp-sdk/PluginAdapter.h"
fazekasgy@0: #include "PyPlugScanner.h"
fazekasgy@0: #include "PyPlugin.h"
fazekasgy@0: 
fazekasgy@0: #ifdef _WIN32
fazekasgy@0: #define pathsep ('\\')
fazekasgy@0: #include <windows.h>
fazekasgy@0: #include <tchar.h>
fazekasgy@0: #else 
fazekasgy@0: #define pathsep ('/')
fazekasgy@0: #include <dirent.h>
fazekasgy@0: #include <dlfcn.h>
fazekasgy@0: #endif
fazekasgy@0: 
fazekasgy@0: using std::cerr;
fazekasgy@0: using std::endl;
fazekasgy@0: using std::string;
fazekasgy@0: using std::vector;
fazekasgy@0: 
fazekasgy@6: //volatile bool mutex = false;
fazekasgy@0: static int adinstcount;
fazekasgy@0: 
fazekasgy@0: class PyPluginAdapter : public Vamp::PluginAdapterBase
fazekasgy@0: {
fazekasgy@0: public: 
fazekasgy@0: 	PyPluginAdapter(std::string pyPlugId, PyObject* pyInstance) :
fazekasgy@0: 		PluginAdapterBase(),
fazekasgy@0: 		m_plug(pyPlugId),		
fazekasgy@0: 		m_pyInstance(pyInstance)
fazekasgy@0: 		{ 
fazekasgy@0: 			cerr << "PyPluginAdapter:ctor:"<< adinstcount << ": " << m_plug << endl; 
fazekasgy@0: 			adinstcount++;
fazekasgy@0: 			m_instanceCount = 0;
fazekasgy@0: 		}
fazekasgy@0: 	
fazekasgy@0: 	~PyPluginAdapter() 
fazekasgy@0: 	{
fazekasgy@0: 	}
fazekasgy@0: 
fazekasgy@0: protected:
fazekasgy@0: 	Vamp::Plugin *createPlugin(float inputSampleRate) {
fazekasgy@0:         
fazekasgy@0: 		std::string pclass = m_plug.substr(m_plug.rfind(':')+1,m_plug.size()-1);
fazekasgy@0: 		std::string ppath = m_plug.substr(0,m_plug.rfind(pathsep));
fazekasgy@0: 		PyPlugin *plugin = new PyPlugin(m_plug,inputSampleRate,m_pyInstance);
fazekasgy@0: 		m_instanceCount++;
fazekasgy@0: 		cerr << "PyPluginAdapter::createPlugin:" << pclass << " (instance: " << m_instanceCount << ")" << endl;
fazekasgy@0: 		return plugin;
fazekasgy@0: 
fazekasgy@0: 		}
fazekasgy@0: 
fazekasgy@0: 	std::string m_plug;
fazekasgy@0: 	bool m_haveInitialized;
fazekasgy@0: 	PyObject *m_pyInstance;
fazekasgy@0: 	int m_instanceCount;
fazekasgy@0: 
fazekasgy@0: };
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: static std::vector<PyPluginAdapter *> adapters;
fazekasgy@0: static bool haveScannedPlugins = false;
fazekasgy@0: 
fazekasgy@0: const VampPluginDescriptor 
fazekasgy@0: *vampGetPluginDescriptor(unsigned int version,unsigned int index)
fazekasgy@0: {	
fazekasgy@0:     if (version < 1) return 0;
fazekasgy@0: 
fazekasgy@0: 	int isPythonInitialized = Py_IsInitialized();
fazekasgy@0: 	//cerr << "# isPythonInitialized: " << isPythonInitialized << endl;
fazekasgy@0: 	//cerr << "# haveScannedPlugins: " << haveScannedPlugins << endl;
fazekasgy@0: 
fazekasgy@0: 	if (!haveScannedPlugins) {
fazekasgy@8: 
fazekasgy@0: 		if (!isPythonInitialized) {
fazekasgy@0: 
fazekasgy@0: 			string pythonPath = 
fazekasgy@0: 			(string) Py_GetExecPrefix() + pathsep +
fazekasgy@0: 			(string) Py_GetProgramName();
fazekasgy@0: 			
fazekasgy@0: 			void *pylib = 0; 
fazekasgy@0: 			
fazekasgy@0: 			cerr << "Loading Python Interpreter at: " << pythonPath << endl;
fazekasgy@1: 			//Preloading the binary allows the load of shared libs 
fazekasgy@0: 			//TODO: check how to do RTLD_NOW on Windows
fazekasgy@2: #ifdef _WIN32
fazekasgy@0: 			pylib = LoadLibrary(pythonPath.c_str());
fazekasgy@0: #else			
fazekasgy@0: 			pylib = dlopen(pythonPath.c_str(), RTLD_NOW|RTLD_GLOBAL);
fazekasgy@0: #endif			
fazekasgy@0: 			if (!pylib) cerr << "Warning: Could not preload Python." 
fazekasgy@1: 						<< " Dynamic loading in scripts will fail." << endl;
fazekasgy@0: 			Py_Initialize();
fazekasgy@0: 	 		PyEval_InitThreads();			
fazekasgy@0: 		} else {
fazekasgy@0: 			//Py_InitializeEx(1);
fazekasgy@0: 		}
fazekasgy@0: 
fazekasgy@0: 		vector<string> pyPlugs;
fazekasgy@0: 		vector<string> pyPath;
fazekasgy@0: 		vector<PyObject *> pyInstances;
fazekasgy@0: 		static PyPlugScanner *scanner;
fazekasgy@0: 		
fazekasgy@0: 		//Scanning Plugins
fazekasgy@0: 		cerr << "Scanning PyPlugins" << endl;
fazekasgy@0: 		scanner = PyPlugScanner::getInstance();
fazekasgy@0: 		pyPath=scanner->getAllValidPath();
fazekasgy@0: 		//add this as extra path for development
fazekasgy@6: 		//pyPath.push_back("/Users/Shared/Development/vamp-experiments");
fazekasgy@0: 		scanner->setPath(pyPath);
fazekasgy@0: 		pyPlugs = scanner->getPyPlugs();
fazekasgy@0: 		cerr << "Found " << pyPlugs.size() << " Scripts ...OK" << endl;
fazekasgy@0: 		//TODO: this will support multiple classes per script
fazekasgy@0: 		pyInstances = scanner->getPyInstances();
fazekasgy@0: 		cerr << "Found " << pyInstances.size() << " Instances ...OK" << endl;
fazekasgy@0: 
fazekasgy@0: 		for (size_t i = 0; i < pyPlugs.size(); ++i) {
fazekasgy@0: 			adapters.push_back( new PyPluginAdapter(pyPlugs[i],pyInstances[i]));
fazekasgy@0: 		} 
fazekasgy@0: 		haveScannedPlugins=true;		
fazekasgy@6: 		
fazekasgy@0: 	}
fazekasgy@0: 
fazekasgy@0: 	cerr << "Accessing adapter index: " << index << " (adapters: " << adapters.size() << ")" << endl;
fazekasgy@0: 	if (index<adapters.size()) {
fazekasgy@0: 		const VampPluginDescriptor *tmp = adapters[index]->getDescriptor();
fazekasgy@0: 		return tmp;
fazekasgy@0: 	} else return 0;
fazekasgy@0: 
fazekasgy@0: 	
fazekasgy@0: }
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: 
fazekasgy@0: