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如何用ffmpeg编写一个简单播放器详细步骤介绍及源码
如何用ffmpeg编写一个简单播放器详细步骤介绍及源码,压缩包内含有详细文档介绍以及源代码,好资源。
- 2023-04-10 05:30:03下载
- 积分:1
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This course is designed for individuals interested in developing their skills in...
This course is designed for individuals interested in developing their skills in Microsoft Visual C++ 6.0 while developing desktop applications. Topics include using the Microsoft Solutions Framework (MSF) building applications with the Microsoft Foundation Classes (MFC) creating user interfaces implementing application behaviors and working with persistent data. Also included are adding database support to applications creating Component Object Model (COM) components and ActiveX controls using MFC and the Active Template Library (ATL) Internet programming error handling, debugging, and testing and application deployment.
- 2022-04-01 21:44:40下载
- 积分:1
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操作JPEG的库和源程序
操作JPEG的库和源程序-operation of the library and JPEG source
- 2023-09-03 13:25:04下载
- 积分:1
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VB to read and write registry download !!!!! we try,
VB读写注册表!!!!!大家下载试试,-VB to read and write registry download !!!!! we try,
- 2023-07-22 23:15:02下载
- 积分:1
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ggxj hguyxhsjhgxukhxh
nsahjvdxjhbska; ihcxivbsj,jkchbds
dbcvdbclvds.kcvdsc
d bcdvgcjd
- 2023-03-20 04:30:02下载
- 积分:1
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解算大地元素,解算大地方位角,解算大地的经度和纬度
解算大地元素,解算大地方位角,解算大地的经度和纬度-Solver earth element solver earth azimuth, Solution earth longitude and latitude
- 2023-07-15 18:35:04下载
- 积分:1
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文件修改监控
ReadDirectoryChangesW 有同步和异步2种方式,
根据前面打开的文件夹对象句柄决定。
1. 异步方式,如果 CreateFile 指定了打开类型 FILE_FLAG_OVERLAPPED 就是异步方式,ReadDirectoryChangesW 调用的时候就需要指定 OVERLAPPED 参数.
接下来对文件夹I/O变化的响应判断有多种方式。
A通过不断的调用HasOverlappedIoCompleted函数(非阻塞,参数就是前面的OVERLAPPED 对象指针)的返回值来判断是否发生了 关注文件句柄的I/O操作。如果发生变化,再执行你的 switch(Buffer[0].Action) 操作过程。
B GetOverlappedResult 读取 OVERLAPPED 对象的结果。(阻塞)
C 完成端口 GetQueuedCompletionStatus (阻塞)。
其中阻塞方式,必须采用多线程的方式,否则你的主线程被阻塞的话,对话框就动不了了。非阻塞方式也可用多线程,结合hEvent对象来使用。
2.同步方式,如果CreateFile不指定FILE_FLAG_OVERLAPPED ,就是同步方式。
同步方式操作比较简单。lz的程序看来就是使用的同步方式。
在同步下,ReadDirectoryChangesW 将被阻塞,直到一个文件夹句柄的I/O操作到来,然后才能判断。所以lz的程序会死掉。
同步方式必须采用多线程,再创建一个线程,线程函数采用如下方式:
UINT ThreadProc(PVOID)
{
CreateFile();
while(1) // 如果只想监视一次文件的I/O变化,可不用while循环。
{
- 2022-03-10 05:44:52下载
- 积分:1
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plus
常见C++ 课程的立体源码,其中含有函数,类与对象,继承与派生,多态,等C++常见的集中类型-plus
- 2022-03-21 04:48:18下载
- 积分:1
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an arithmetic software on the network game "Mu".it was used to enjoy myself in t...
网游奇迹的战士配点算法软件,是当初游戏时自己编写来玩的,采用VC编写,界面简单使用方便!-an arithmetic software on the network game "Mu".it was used to enjoy myself in the first. it was writen by Vc ,and was designed very convenient to use .
- 2022-02-20 17:45:12下载
- 积分:1
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OPC Client Development Kit
OPC 客户端开发工具包-OPC Client Development Kit
- 2022-11-11 08:25:03下载
- 积分:1