diff PyFeature.cpp @ 37:27bab3a16c9a vampy2final

new branch Vampy2final

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PyFeature.cpp	Mon Oct 05 11:28:00 2009 +0000
@@ -0,0 +1,235 @@
+/*
+
+ * 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>
+#include "PyExtensionModule.h"
+#include "PyFeature.h"
+#include "vamp-sdk/Plugin.h"
+#include <string>
+
+using namespace std;
+using namespace Vamp;
+using Vamp::Plugin;
+
+/* CONSTRUCTOR: New Feature object */
+static PyObject *
+Feature_new(PyTypeObject *type, PyObject *args, PyObject *kw)
+{
+	// FeatureObject *self = PyObject_New(FeatureObject, &Feature_Type); 
+	FeatureObject *self = (FeatureObject*)type->tp_alloc(type, 0);
+	if (self == NULL) return NULL;
+    self->dict = PyDict_New();
+	if (self->dict == NULL) return NULL;
+
+	/// 4 args max.: {values|self_copy},timestamp,duration,label 
+	if(args && PyTuple_GET_SIZE(args)>0) {
+		int s =  PyTuple_GET_SIZE(args);
+		PyObject* arg0 = PyTuple_GET_ITEM(args,0);
+		if (s == 1 && PyFeature_CheckExact(arg0))
+			PyDict_Merge(self->dict,PyFeature_AS_DICT(arg0),0);
+		else
+			PyDict_SetItemString(self->dict, "values", arg0);
+		if (s>1) {
+			PyDict_SetItemString(self->dict, "timestamp", PyTuple_GET_ITEM(args,1));
+			PyDict_SetItemString(self->dict, "hasTimestamp", Py_True);
+		}
+		if (s>2) {
+			PyDict_SetItemString(self->dict, "duration", PyTuple_GET_ITEM(args,2));
+			PyDict_SetItemString(self->dict, "hasDuration", Py_True);
+		}
+		if (s>3) {
+			PyDict_SetItemString(self->dict, "label", PyTuple_GET_ITEM(args,3));
+		}
+	}
+
+	/// accept keyword arguments: 
+	/// e.g. Feature(values = theOutputArray)
+	if (!kw || !PyDict_Size(kw)) return (PyObject *) self;
+	PyDict_Merge(self->dict,kw,0);
+
+	static char *kwlist[] = {"timestamp", "hasTimestamp", "duration", "hasDuration", 0};
+
+	int i = 0;
+	while (kwlist[i]) {
+		char* name = kwlist[i];
+		char* attr = kwlist[++i];
+		i++;
+		PyObject *key = PyString_FromString(name);
+		if (!key) break;
+		if (PyDict_Contains(kw,key)) {
+			if (PyDict_SetItem(self->dict,PyString_FromString(attr),Py_True) != 0)
+				PyErr_SetString(PyExc_TypeError, 
+					"Error: in keyword arguments of vampy.Feature().");
+		}
+		Py_DECREF(key);
+	}
+
+	return (PyObject *) self;
+}
+
+/* DESTRUCTOR: delete type object */
+static void
+FeatureObject_dealloc(FeatureObject *self)
+{
+	Py_XDECREF(self->dict);
+	self->ob_type->tp_free((PyObject*)self);
+}
+
+/*					 Feature Object's Methods 					*/ 
+//Feature objects have no callable methods
+
+/*		   PyFeature methods implementing protocols 		   	   */ 
+// these functions are called by the interpreter automatically
+
+/* Set attributes */
+static int
+Feature_setattr(FeatureObject *self, char *name, PyObject *v)
+{
+	if (v == NULL) 
+	{
+		int rv = PyDict_DelItemString(self->dict, name);
+		if (rv < 0)
+			PyErr_SetString(PyExc_AttributeError,"non-existing Feature attribute");
+		return rv;
+	}
+	else return PyDict_SetItemString(self->dict, name, v);
+}
+
+
+/* Get attributes */
+static PyObject *
+Feature_getattr(FeatureObject *self, char *name)
+{
+	if (self->dict != NULL) {
+		PyObject *v = PyDict_GetItemString(self->dict, name);
+		if (v != NULL) 
+		{
+			Py_INCREF(v);
+			return v;
+		}
+	}
+	return NULL;
+}
+
+/* The problem with this is that we'd need to implement two-way
+conversions which is really unnecesary: The case for using 
+a Vamp::Feature in Python for anything else than returning 
+values is rather obscure. It's not really worth it. */
+
+/* Set Attribute: Using wrapped Vamp::Feature 
+static int
+Feature_setattr(FeatureObject *self, char *name, PyObject *value)
+{
+	std::string key = std::string(name);
+	if (self->ti.SetValue(*(self->feature),key,value)) return 0;
+	else return -1;
+}*/
+
+/* Get Attribute: Using wrapped Vamp::Feature 
+static PyObject *
+Feature_getattr(FeatureObject *self, char *name)
+{
+	std::string key = std::string(name);
+	PyObject* pyValue;
+	if (self->ti.GetValue(*(self->feature),key,pyValue)) 
+		return pyValue;
+	else return NULL;
+}*/
+
+/*
+static int
+Feature_init(FeatureObject *self, PyObject *args, PyObject *kwds)
+{
+	cerr << "FeatureObject Init called" << endl;
+	return 0;
+}
+
+PyObject*
+Feature_test(PyObject *self, PyObject *args, PyObject *kwds)
+{
+	cerr << "FeatureObject TEST called" << endl;
+	return self;
+}
+*/
+
+/* String representation */
+static PyObject *
+Feature_repr(PyObject *self)
+{
+	FeatureObject* v = (FeatureObject*)self;
+	if (v->dict) return PyDict_Type.tp_repr((PyObject *)v->dict);
+	else return PyString_FromString("Feature()");
+}
+
+#define Feature_alloc PyType_GenericAlloc
+#define Feature_free PyObject_Del
+
+
+/*						FEATURE TYPE OBJECT						*/
+
+PyTypeObject Feature_Type = {
+	PyObject_HEAD_INIT(NULL)
+	0,						/*ob_size*/
+	"vampy.Feature",		/*tp_name*/
+	sizeof(FeatureObject),	/*tp_basicsize*/
+	0,						/*tp_itemsize*/
+	(destructor)FeatureObject_dealloc, /*tp_dealloc*/
+	0,						/*tp_print*/
+	(getattrfunc)Feature_getattr, /*tp_getattr*/
+	(setattrfunc)Feature_setattr, /*tp_setattr*/
+	0,						/*tp_compare*/
+	Feature_repr,			/*tp_repr*/
+	0,						/*tp_as_number*/
+	0,						/*tp_as_sequence*/
+	0,						/*tp_as_mapping*/
+	0,						/*tp_hash*/
+	0,//Feature_test,           /*tp_call*/ // call on an instance
+    0,                      /*tp_str*/
+    0,                      /*tp_getattro*/
+    0,                      /*tp_setattro*/
+    0,                      /*tp_as_buffer*/
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,     /*tp_flags*/
+    0,                      /*tp_doc*/
+    0,                      /*tp_traverse*/
+    0,                      /*tp_clear*/
+    0,                      /*tp_richcompare*/
+    0,                      /*tp_weaklistoffset*/
+    0,                      /*tp_iter*/
+    0,                      /*tp_iternext*/
+    0,				        /*tp_methods*/ //TypeObject Methods
+    0,                      /*tp_members*/
+    0,                      /*tp_getset*/
+    0,                      /*tp_base*/
+    0,                      /*tp_dict*/
+    0,                      /*tp_descr_get*/
+    0,                      /*tp_descr_set*/
+    0,                      /*tp_dictoffset*/
+    0,//(initproc)Feature_init, /*tp_init*/
+    Feature_alloc,          /*tp_alloc*/
+    Feature_new,            /*tp_new*/
+    Feature_free,			/*tp_free*/
+    0,                      /*tp_is_gc*/
+};
+
+/*		  		 	  PyRealTime C++ API  	  		  				*/
+
+/*Feature* from PyFeature
+const Vamp::Plugin::Feature*
+PyFeature_AsFeature (PyObject *self) { 
+
+	FeatureObject *s = (FeatureObject*) self; 
+
+	if (!PyFeature_Check(s)) {
+		PyErr_SetString(PyExc_TypeError, "Feature Object Expected.");
+		cerr << "in call PyFeature_AsPointer(): Feature Object Expected. " << endl;
+		return NULL; }
+	return s->feature; 
+};*/