comparison pyvamp-main.cpp @ 0:e20e214bdfb5

Added VAMP-Python binding project vampy

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Vamp
+
+    An API for audio analysis and feature extraction plugins.
+
+    Centre for Digital Music, Queen Mary, University of London.
+    Copyright 2006 Chris Cannam.
+  
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use, copy,
+    modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
+    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    Except as contained in this notice, the names of the Centre for
+    Digital Music; Queen Mary, University of London; and Chris Cannam
+    shall not be used in advertising or otherwise to promote the sale,
+    use or other dealings in this Software without prior written
+    authorization.
+*/
+
+/**
+ * This VAMP plugin is a wrapper for Python Scripts. (VamPy)
+ * Centre for Digital Music, Queen Mary, University of London.
+ * Copyright 2008, George Fazekas.
+
+TODO:	needs more complete error checking 
+	  	needs correct implementation of Python threading
+	  	more efficient data conversion using the buffering interface or ctypes
+	 	VAMP 'programs' not implemented
+		support multiple plugins per script in scanner
+		ensure proper cleanup, (host do a good job though)
+
+COMPILING AND LINKING:
+		(1) include Python.h wherever it is on your machine 
+		(2) this plugin needs to be linked against the Python binary:
+
+		example on on MacOSX:
+		g++  -O2 -Wall -I. -fPIC -c -o pyvamp-main.o pyvamp-main.cpp
+		g++  -dynamiclib   -o vamp-pyvamp-plugin.dylib ./PyPlugScanner.o ./PyPlugin.o ./pyvamp-main.o sdk/vamp-sdk/libvamp-sdk.a 
+		...	 -u _PyMac_Error /Library/Frameworks/Python.framework/Versions/2.5/Python
+*/
+
+//#include "Python.h"
+#include "/usr/include/python/Python.h"
+#include "vamp/vamp.h"
+#include "vamp-sdk/PluginAdapter.h"
+#include "PyPlugScanner.h"
+#include "PyPlugin.h"
+
+#ifdef _WIN32
+#define pathsep ('\\')
+#include <windows.h>
+#include <tchar.h>
+#else 
+#define pathsep ('/')
+#include <dirent.h>
+#include <dlfcn.h>
+#endif
+
+using std::cerr;
+using std::endl;
+using std::string;
+using std::vector;
+
+volatile bool mutex = false;
+static int adinstcount;
+
+class PyPluginAdapter : public Vamp::PluginAdapterBase
+{
+public: 
+	PyPluginAdapter(std::string pyPlugId, PyObject* pyInstance) :
+		PluginAdapterBase(),
+		m_plug(pyPlugId),		
+		m_pyInstance(pyInstance)
+		{ 
+			cerr << "PyPluginAdapter:ctor:"<< adinstcount << ": " << m_plug << endl; 
+			adinstcount++;
+			m_instanceCount = 0;
+		}
+	
+	~PyPluginAdapter() 
+	{
+	}
+
+protected:
+	Vamp::Plugin *createPlugin(float inputSampleRate) {
+        
+		std::string pclass = m_plug.substr(m_plug.rfind(':')+1,m_plug.size()-1);
+		std::string ppath = m_plug.substr(0,m_plug.rfind(pathsep));
+		PyPlugin *plugin = new PyPlugin(m_plug,inputSampleRate,m_pyInstance);
+		m_instanceCount++;
+		cerr << "PyPluginAdapter::createPlugin:" << pclass << " (instance: " << m_instanceCount << ")" << endl;
+		return plugin;
+
+		}
+
+	std::string m_plug;
+	bool m_haveInitialized;
+	PyObject *m_pyInstance;
+	int m_instanceCount;
+
+};
+
+
+static std::vector<PyPluginAdapter *> adapters;
+static bool haveScannedPlugins = false;
+
+const VampPluginDescriptor 
+*vampGetPluginDescriptor(unsigned int version,unsigned int index)
+{	
+    if (version < 1) return 0;
+
+	int isPythonInitialized = Py_IsInitialized();
+	//cerr << "# isPythonInitialized: " << isPythonInitialized << endl;
+	//cerr << "# haveScannedPlugins: " << haveScannedPlugins << endl;
+
+	if (!haveScannedPlugins) {
+		
+		if (!isPythonInitialized) {
+
+			string pythonPath = 
+			(string) Py_GetExecPrefix() + pathsep +
+			(string) Py_GetProgramName();
+			
+			void *pylib = 0; 
+			
+			cerr << "Loading Python Interpreter at: " << pythonPath << endl;
+			//Preloading the binary allows the load of shared libs //dlopen("/Library/Frameworks/Python.framework/Versions/2.5/Python", RTLD_NOW|RTLD_GLOBAL);
+#ifdef _WIN32
+			//TODO: check how to do RTLD_NOW on Windows
+			pylib = LoadLibrary(pythonPath.c_str());
+#else			
+			pylib = dlopen(pythonPath.c_str(), RTLD_NOW|RTLD_GLOBAL);
+#endif			
+			if (!pylib) cerr << "Warning: Could not preload Python." 
+						<< " Dynamic lodading in scripts will fail." << endl;
+			Py_Initialize();
+	 		PyEval_InitThreads();			
+		} else {
+			//Py_InitializeEx(1);
+		}
+
+		vector<string> pyPlugs;
+		vector<string> pyPath;
+		vector<PyObject *> pyInstances;
+		static PyPlugScanner *scanner;
+		
+		//Scanning Plugins
+		cerr << "Scanning PyPlugins" << endl;
+		scanner = PyPlugScanner::getInstance();
+		pyPath=scanner->getAllValidPath();
+		//add this as extra path for development
+		pyPath.push_back("/Users/Shared/Development/vamp-experiments");
+		scanner->setPath(pyPath);
+		pyPlugs = scanner->getPyPlugs();
+		cerr << "Found " << pyPlugs.size() << " Scripts ...OK" << endl;
+		//TODO: this will support multiple classes per script
+		pyInstances = scanner->getPyInstances();
+		cerr << "Found " << pyInstances.size() << " Instances ...OK" << endl;
+
+		for (size_t i = 0; i < pyPlugs.size(); ++i) {
+			adapters.push_back( new PyPluginAdapter(pyPlugs[i],pyInstances[i]));
+		} 
+		haveScannedPlugins=true;		
+	}
+
+	cerr << "Accessing adapter index: " << index << " (adapters: " << adapters.size() << ")" << endl;
+	if (index<adapters.size()) {
+		const VampPluginDescriptor *tmp = adapters[index]->getDescriptor();
+		return tmp;
+	} else return 0;
+
+	
+}
+
+
+
+
+
+
+
+