annotate PyFeatureSet.cpp @ 53:7e59caea821b

* Make a better job of preloading Python, especially when it's in a
  framework.  Go for the Python file in the frameworks directory in
  preference to any libpythonX.Y.dylib.  Particularly, don't try to
  preload any library without an absolute path until we've exhausted
  all our framework possibilities (so as to avoid picking up an
  ancient system library).

/*

 * 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 "PyFeatureSet.h"
#include "vamp-sdk/Plugin.h"

using namespace std;

static int
FeatureSet_init(FeatureSetObject *self, PyObject *args, PyObject *kwds)
{
    if (PyDict_Type.tp_init((PyObject *)self, args, kwds) < 0)
        return -1;
    return 0;
}

static int
FeatureSetObject_ass_sub(FeatureSetObject *mp, PyObject *v, PyObject *w)
{
	if (!PyInt_CheckExact(v)) {
		PyErr_SetString(PyExc_ValueError,
			"Output index must be positive integer.");
		return 0;
	}
	if (w == NULL)
		return PyDict_DelItem((PyObject *)mp, v);
	else
		return PyDict_SetItem((PyObject *)mp, v, w);
}

#define FeatureSet_alloc PyType_GenericAlloc
#define FeatureSet_free PyObject_Del
//#define FeatureSet_as_mapping PyDict_Type.tp_as_mapping

static PyMappingMethods FeatureSet_as_mapping = *(PyDict_Type.tp_as_mapping);

PyTypeObject FeatureSet_Type = PyDict_Type;

void
initFeatureSetType(void)
{
	/*This type is derived from PyDict. We just override some slots here.*/
	/*The typical use case is index based assignment as opposed to object memeber access.*/
	FeatureSet_Type.ob_type = &PyType_Type;
	FeatureSet_Type.tp_base = &PyDict_Type;
	FeatureSet_Type.tp_bases = PyTuple_Pack(1, FeatureSet_Type.tp_base);
	FeatureSet_Type.tp_name = "vampy.FeatureSet";
	// FeatureSet_Type.tp_new = FeatureSet_new;
	FeatureSet_Type.tp_init = (initproc)FeatureSet_init;
	FeatureSet_Type.tp_basicsize = sizeof(FeatureSetObject);
	FeatureSet_as_mapping.mp_ass_subscript = (objobjargproc)FeatureSetObject_ass_sub;
	FeatureSet_Type.tp_as_mapping = &FeatureSet_as_mapping;
}