comparison vampy-main.cpp @ 37:27bab3a16c9a vampy2final

new branch Vampy2final

+/*
+
+ * Vampy : This plugin is a wrapper around the Vamp plugin API.
+ * It allows for writing Vamp plugins in Python.
+
+ * Centre for Digital Music, Queen Mary University of London.
+ * Copyright (C) 2008-2009 Gyorgy Fazekas, QMUL. (See Vamp sources 
+ * for licence information.)
+
+*/
+
+#include <Python.h>
+
+#ifdef HAVE_NUMPY
+#define PY_ARRAY_UNIQUE_SYMBOL VAMPY_ARRAY_API
+#include "numpy/arrayobject.h"
+#endif
+
+#include "vamp/vamp.h"
+#include "vamp-sdk/PluginAdapter.h"
+#include "PyPlugScanner.h"
+#include "PyPlugin.h"
+#include "PyExtensionModule.h"
+#include "PyExtensionManager.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;
+
+static int adinstcount;
+static int totinstcount;
+
+class PyPluginAdapter : public Vamp::PluginAdapterBase
+{
+public: 
+    PyPluginAdapter(std::string pyPlugId, PyObject* pyClass) :
+        PluginAdapterBase(),
+        m_plug(pyPlugId),		
+        m_pyClass(pyClass),
+		m_failed(false)
+    { 
+        cerr << "PyPluginAdapter:ctor:"<< adinstcount << ": " << m_plug << endl; 
+        adinstcount++;
+    }
+    
+    ~PyPluginAdapter() 
+    {
+    }
+
+	bool failed() { return m_failed; }
+	std::string getPlugKey() { return m_plug; }
+
+protected:
+    Vamp::Plugin *createPlugin(float inputSampleRate)
+    {
+        try {
+            PyPlugin *plugin = new PyPlugin(m_plug, inputSampleRate, m_pyClass, totinstcount);
+            return plugin;
+        } catch (...) {
+            cerr << "PyPluginAdapter::createPlugin: Failed to construct PyPlugin" << endl;
+			// any plugin with syntax errors will fail to construct
+			m_failed = true;
+            return 0;
+        }
+    }
+    
+    std::string m_plug;
+    PyObject *m_pyClass;
+	bool m_failed;  
+};
+
+static void array_API_initialiser()
+{
+/// numpy C-API requirement
+#ifdef HAVE_NUMPY
+	import_array();
+	if(NPY_VERSION != PyArray_GetNDArrayCVersion())
+		cerr << "Warning: Numpy ABI version mismatch. (Build version: " 
+		<< NPY_VERSION << " Runtime version: " << PyArray_GetNDArrayCVersion() << ")" << endl;
+#endif
+}
+
+
+static std::vector<PyPluginAdapter *> adapters;
+static bool haveScannedPlugins = false;
+
+static bool tryPreload(string name)
+{
+#ifdef _WIN32
+    void *lib = LoadLibrary(name.c_str());
+    if (!lib) {
+        return false;
+    }
+#else
+    void *lib = dlopen(name.c_str(), RTLD_NOW | RTLD_GLOBAL);
+    if (!lib) {
+        return false;
+    }
+#endif
+    return true;
+}
+
+static bool preloadPython()
+{
+#ifdef _WIN32
+    // this doesn't seem to be necessary at all on Windows
+    return true;
+#endif
+
+    string pyver = Py_GetVersion();
+    int dots = 2;
+    string shortver;
+    for (size_t i = 0; i < pyver.length(); ++i) {
+        if (pyver[i] == '.') {
+            if (--dots == 0) {
+                shortver = pyver.substr(0, i);
+                break;
+            }
+        }
+    }
+    cerr << "Short version: " << shortver << endl;
+	// this is useful to find out where the loaded library might be loaded from
+	cerr << "Python exec prefix: " << Py_GetExecPrefix() << endl;
+
+    vector<string> pfxs;
+    pfxs.push_back("");
+    pfxs.push_back(string(Py_GetExecPrefix()) + "/lib/");
+    pfxs.push_back(string(Py_GetExecPrefix()) + "/");
+    pfxs.push_back("/usr/lib/");
+    pfxs.push_back("/usr/local/lib/");
+    char buffer[5];
+
+    // hahaha! grossness is like a brother to us
+#ifdef __APPLE__
+    for (size_t pfxidx = 0; pfxidx < pfxs.size(); ++pfxidx) {
+        for (int minor = 8; minor >= 0; --minor) {
+            sprintf(buffer, "%d", minor);
+            if (tryPreload(pfxs[pfxidx] + string("libpython") + shortver + ".dylib." + buffer)) return true;
+        }
+        if (tryPreload(pfxs[pfxidx] + string("libpython") + shortver + ".dylib")) return true;
+        if (tryPreload(pfxs[pfxidx] + string("libpython.dylib"))) return true;
+    }
+#else
+    for (size_t pfxidx = 0; pfxidx < pfxs.size(); ++pfxidx) {
+        for (int minor = 8; minor >= 0; --minor) {
+            sprintf(buffer, "%d", minor);
+            if (tryPreload(pfxs[pfxidx] + string("libpython") + shortver + ".so." + buffer)) return true;
+        }
+        if (tryPreload(pfxs[pfxidx] + string("libpython") + shortver + ".so")) return true;
+        if (tryPreload(pfxs[pfxidx] + string("libpython.so"))) return true;
+    }
+#endif
+        
+    return false;
+}
+
+
+static PyExtensionManager pyExtensionManager;
+
+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){
+
+			if (!preloadPython())
+				cerr << "Warning: Could not preload Python. Dynamic loading in scripts will fail." << endl;
+			if (PyImport_AppendInittab("vampy",initvampy) != 0)
+				cerr << "Warning: Extension module could not be added to module inittab." << endl;
+			Py_Initialize();
+			initvampy();
+#ifdef _DEBUG			
+		    cerr << "# isPythonInitialized after initialize: " << Py_IsInitialized() << endl;
+#endif		
+		}
+
+		vector<string> pyPlugs;
+		vector<string> pyPath;
+		vector<PyObject *> pyClasses;
+		static PyPlugScanner *scanner;
+		
+		//Scanning Plugins
+		cerr << "Scanning Vampy Plugins" << endl;
+		scanner = PyPlugScanner::getInstance();
+
+		// added env. varable support VAMPY_EXTPATH
+		pyPath=scanner->getAllValidPath();
+		scanner->setPath(pyPath);
+		
+		// added env. variable support: 
+		// VAMPY_COMPILED=1 to recognise .pyc files (default is 1)
+		pyPlugs = scanner->getPyPlugs();
+
+		cerr << "Found " << pyPlugs.size() << " Scripts." << endl;
+		//TODO: should this support multiple classes per script (?)
+		pyClasses = scanner->getPyClasses();
+		cerr << "Found " << pyClasses.size() << " Classes." << endl;
+
+		for (size_t i = 0; i < pyPlugs.size(); ++i) {
+			adapters.push_back( new PyPluginAdapter(pyPlugs[i],pyClasses[i]));
+		}
+		pyExtensionManager.setPlugModuleNames(pyPlugs);
+		pyExtensionManager.initExtension();
+		array_API_initialiser();
+		haveScannedPlugins=true;
+	}
+
+#ifdef _DEBUG
+	cerr << "Accessing adapter index: " << index << " (adapters: " << adapters.size() << ")" << endl;
+#endif	
+
+	if (index<adapters.size()) {
+
+		const VampPluginDescriptor *tmp = adapters[index]->getDescriptor();
+
+		if (adapters[index]->failed()) { 
+			cerr << "\nERROR: [in vampGetPluginDescriptor] Removing adapter of: \n'" 
+			<< adapters[index]->getPlugKey() << "'\n" 
+			<< "The plugin has failed to construct. Hint: Check __init__() function." << endl;
+			pyExtensionManager.deleteModuleName(adapters[index]->getPlugKey());
+			delete adapters[index];
+			adapters.erase(adapters.begin()+index);
+			return 0;
+		}
+
+		return tmp;
+
+	} else return 0;
+}
+
+
+
+
+
+
+
+