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/*
py/pyext - python script object for PD and Max/MSP
Copyright (c)2002-2005 Thomas Grill (gr@grrrr.org)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
#include "main.h"
#ifdef PY_NUMARRAY
#include <numarray/numarray.h>
static bool nasupport = false;
static NumarrayType numtype;
#endif
// PD defines a T_OBJECT symbol
#undef T_OBJECT
#include "structmember.h"
#include "bufferobject.h"
static PyObject *buffer_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
pySamplebuffer *self = (pySamplebuffer *)pySamplebuffer_Type.tp_alloc(&pySamplebuffer_Type, 0);
self->sym = NULL;
self->buf = NULL;
self->dirty = false;
return (PyObject *)self;
}
static void buffer_dealloc(PyObject *obj)
{
pySamplebuffer *self = (pySamplebuffer *)obj;
if(self->buf) {
self->buf->Unlock(self->lock);
if(self->dirty) self->buf->Dirty(true);
delete self->buf;
}
obj->ob_type->tp_free(obj);
}
static int buffer_init(PyObject *obj, PyObject *args, PyObject *kwds)
{
FLEXT_ASSERT(pySamplebuffer_Check(obj));
PyObject *arg = PySequence_GetItem(args,0); // new reference
if(!arg) return -1;
int ret = 0;
pySamplebuffer *self = (pySamplebuffer *)obj;
FLEXT_ASSERT(!self->sym && !self->buf);
if(pySymbol_Check(arg))
self->sym = pySymbol_AS_SYMBOL(arg);
else if(PyString_Check(arg))
self->sym = flext::MakeSymbol(PyString_AS_STRING(arg));
else
ret = -1;
Py_DECREF(arg);
if(self->sym) {
flext::buffer *b = new flext::buffer(self->sym);
if(b->Ok() && b->Valid())
self->lock = (self->buf = b)->Lock();
else
delete b;
}
return ret;
}
static PyObject *buffer_repr(PyObject *self)
{
FLEXT_ASSERT(pySamplebuffer_Check(self));
return (PyObject *)PyString_FromFormat("<Samplebuffer %s>",pySamplebuffer_AS_STRING(self));
}
static long buffer_hash(PyObject *self)
{
FLEXT_ASSERT(pySamplebuffer_Check(self));
return (long)(((pySamplebuffer *)self)->buf);
}
static PyObject *buffer_getsymbol(pySamplebuffer* self,void *closure)
{
if(self->sym)
return pySymbol_FromSymbol(self->sym);
else {
Py_INCREF(Py_None);
return Py_None;
}
}
static PyGetSetDef buffer_getseters[] = {
{"symbol",(getter)buffer_getsymbol, NULL, NULL},
{NULL} /* Sentinel */
};
static PyObject *buffer_array(PyObject *obj)
{
PyObject *ret;
#ifdef PY_NUMARRAY
if(nasupport) {
pySamplebuffer *self = (pySamplebuffer *)obj;
if(self->buf) {
maybelong shape[2];
shape[0] = self->buf->Frames();
shape[1] = self->buf->Channels();
ret = (PyObject *)NA_NewAllFromBuffer(2,shape,numtype,(PyObject *)self,0,sizeof(t_sample *),NA_ByteOrder(),1,1);
}
else
Py_INCREF(ret = Py_None);
}
else {
PyErr_Format(PyExc_RuntimeError,"No numarray support");
ret = NULL;
}
#else
Py_INCREF(ret = Py_None);
#endif
return ret;
}
static PyObject *buffer_dirty(PyObject *obj)
{
((pySamplebuffer *)obj)->dirty = true;
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef buffer_methods[] = {
{"array", (PyCFunction)buffer_array,METH_NOARGS,"Return a numarray object"},
{"dirty", (PyCFunction)buffer_dirty,METH_NOARGS,"Mark buffer as dirty"},
{NULL} /* Sentinel */
};
// support the buffer protocol
static int buffer_readbuffer(PyObject *obj, int segment, void **ptrptr)
{
flext::buffer *b = ((pySamplebuffer *)obj)->buf;
ptrptr[0] = b->Data();
return b->Channels()*b->Frames()*sizeof(t_sample);
}
static int buffer_writebuffer(PyObject *obj, int segment, void **ptrptr)
{
flext::buffer *b = ((pySamplebuffer *)obj)->buf;
ptrptr[0] = b->Data();
return b->Channels()*b->Frames()*sizeof(t_sample);
}
static int buffer_segcount(PyObject *obj, int *lenp)
{
flext::buffer *b = ((pySamplebuffer *)obj)->buf;
if(lenp) lenp[0] = b->Channels()*b->Frames()*sizeof(t_sample);
return 1;
}
static int buffer_charbuffer(PyObject *obj, int segment, const char **ptrptr)
{
flext::buffer *b = ((pySamplebuffer *)obj)->buf;
ptrptr[0] = (char *)b->Data();
return b->Channels()*b->Frames()*sizeof(t_sample);
}
static PyBufferProcs bufferprocs = {
buffer_readbuffer,
buffer_writebuffer,
buffer_segcount,
buffer_charbuffer
};
PyTypeObject pySamplebuffer_Type = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"Buffer", /*tp_name*/
sizeof(pySamplebuffer), /*tp_basicsize*/
0, /*tp_itemsize*/
buffer_dealloc, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
buffer_repr, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
buffer_hash, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
&bufferprocs, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT /*| Py_TPFLAGS_BASETYPE*/, /*tp_flags*/
"Samplebuffer objects", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0 /*buffer_richcompare*/, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
buffer_methods, /* tp_methods */
0, /* tp_members */
buffer_getseters, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
buffer_init, /* tp_init */
0, /* tp_alloc */
buffer_new, /* tp_new */
};
void initsamplebuffer()
{
#ifdef PY_NUMARRAY
import_libnumarray();
if(PyErr_Occurred())
// catch import error
PyErr_Clear();
else {
// numarray support ok
nasupport = true;
post("");
post("Numarray support enabled");
}
numtype = sizeof(t_sample) == 4?tFloat32:tFloat64;
#endif
if(PyType_Ready(&pySamplebuffer_Type) < 0)
FLEXT_ASSERT(false);
else
Py_INCREF(&pySamplebuffer_Type);
}
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