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Complete extension library PyFFmpeg objects creating 、 Initialization and deconstruction

One 、 Header file implementation

Add header file PyFFmpeg.h

#pragma once
#include<Python.h>
class PyFFmpeg
{

public:
PyObject_HEAD
// Open to python Function of 
public:
static PyObject *Create(PyTypeObject *type, PyObject *args, PyObject *kw);
static int Init(PyFFmpeg*self, PyObject *args, PyObject *kw);
static void Close(PyFFmpeg*self);
};

Two 、 Source file implementation

Source file PyFFmpeg.cpp as follows

#include "PyFFmpeg.h"
// Open to python
PyObject *PyFFmpeg::Create(PyTypeObject *type, PyObject *args, PyObject *kw) {

printf("PyFFmpeg::Create\n");
return type->tp_alloc(type, 0);
}
int PyFFmpeg::Init(PyFFmpeg*self, PyObject *args, PyObject *kw)
{

printf("PyFFmpeg::Init\n");
return 0;
}
void PyFFmpeg::Close(PyFFmpeg*self)
{

printf("PyFFmpeg::Close\n");
Py_TYPE(self)->tp_free(self);
}
// Module entry Module name pyffmpeg
PyMODINIT_FUNC PyInit_pyffmpeg(void)
{

PyObject *m = NULL;
static PyModuleDef ffmod = {

PyModuleDef_HEAD_INIT,
"pyffmpeg",
"", -1, 0
};
m = PyModule_Create(&ffmod);
// add to PyFFmpeg_python class 
static PyTypeObject type;
memset(&type, 0, sizeof(PyFFmpeg));
type.ob_base = {
 PyObject_HEAD_INIT(NULL) 0 };
type.tp_name = "";
type.tp_basicsize = sizeof(PyFFmpeg);
type.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
type.tp_new = PyFFmpeg::Create;
type.tp_init = (initproc)PyFFmpeg::Init;
type.tp_dealloc = (destructor)PyFFmpeg::Close;
// Initialization type 
if (PyType_Ready(&type) < 0) {

return NULL;
}
PyModule_AddObject(m, "PyFFmpeg", (PyObject*)&type);
printf("Pyinit_pyffmpeg\n");
return m;
}

3、 ... and 、python Call run extension library

Compile and pass , And then in testmod.py I quote ：

# import pyffmpeg
from pyffmpeg import *
ff = PyFFmpeg()
del ff
input()

function visual studio Program ：

You can see that the creation is successful and the space has been allocated , Do not call the constructor of the module , The memory is also released when the skates are destructed .

Four 、 summary

• This paper completes the extension library PyFFmpeg objects creating 、 Initialization and deconstruction .
• Next class will explain QT Knowledge of source code
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