Handling COM events in C++ (ATL, MFC or pure C++) for Java interop

I'm currently trying to build a C++ library (DLL file) that interfaces with a COM component, to make it usable in Java. The idea was that I'd build a very small C++ DLL with a class that "wraps" around the COM component, and then export it using SWIG. I got pretty far by using an #import statement: #import "ComponentName.dll" And calling CoInitialize() and creating an instan

用于Java互操作的C ++(ATL,MFC或纯C ++)处理COM事件

我目前正在尝试构建一个与COM组件接口的C ++库(DLL文件),以使其可用于Java。 我的想法是,我将构建一个非常小的C ++ DLL,其中包含一个围绕COM组件“包装”的类,然后使用SWIG将其导出。 通过使用#import语句,我得到了很多: #import "ComponentName.dll" 调用CoInitialize()并创建组件的实例(通过由Visual Studio生成的IComponentNamePtr类)。 这适用于所有正常的COM方法调用,这很好。 但是,我无法弄清楚如何让

How to implement an outgoing interface on a sink object (C++)

I have a predefined TLB file, with IS8SimulationEvents wrapper method implementations, for instance: inline HRESULT IS8SimulationEvents::S8SimulationReset ( ) { HRESULT _result = 0; _com_dispatch_method(this, 0x1, DISPATCH_METHOD, VT_ERROR, (void*)&_result, NULL); return _result; } Using Oleview, I can see the IConnectionPointContainer interface attached to the COM object. Que

如何在接收器对象上实现传出接口(C ++)

我有一个预定义的TLB文件,例如IS8SimulationEvents包装方法实现: inline HRESULT IS8SimulationEvents::S8SimulationReset ( ) { HRESULT _result = 0; _com_dispatch_method(this, 0x1, DISPATCH_METHOD, VT_ERROR, (void*)&_result, NULL); return _result; } 使用Oleview,我可以看到连接到COM对象的IConnectionPointContainer接口。 题: 如何在接收器对象上实现传出接口,以便客户端从COM 对象接收

Receiving COM events

Without: ATL MFC Note: Plain C++ Out-of-process COM Object/server Predefined TLB file Question: How to implement an outgoing interface, so the COM Object can notify the sink of events? How to handle the event appropriately, once received? Below is the event function I'd like to implement - from TLB file: inline HRESULT IS8SimulationEvents::S8SimulationEndRun ( ) { HRE

接收COM事件

无: ATL MFC 注意: Plain C ++ 进程外COM对象/服务器 预定义的TLB文件 题: 如何实现传出接口,以便COM对象可以通知事件的接收器? 如何妥善处理事件,一旦收到? 下面是我想要实现的事件函数 - 从TLB文件: inline HRESULT IS8SimulationEvents::S8SimulationEndRun ( ) { HRESULT _result = 0; _com_dispatch_method(this, 0x2, DISPATCH_METHOD, VT_ERROR, (void*)&_result, NULL); re

COM event notification

Without: ATL MFC Note: Client is executing in a different thread to that of the server Question: How do I control the behaviour of the client, once an event notification is received from the COM object (Server)? How to implement an event interface from client? Illustration below: hresult = pis8->QueryInterface( __uuidof(IConnectionPointContainer), (

COM事件通知

无: ATL MFC 注意: 客户端正在执行与服务器不同的线程 题: 一旦从COM对象(服务器)收到事件通知,我如何控制客户端的行为? 如何从客户端实现事件接口? 下图: hresult = pis8->QueryInterface( __uuidof(IConnectionPointContainer), (void **) &pContainer); //result handling omitted hresult = pContainer->FindConnectionPoint( __u

Can size of pointers to non

I understand there are HW platforms where you need more information to point to a char than you need to point to an int (the platform having non-addressable bytes, so a pointer to char needs to store a pointer to a word and also an index of a byte in the word). So it is possible that sizeof(int*) < sizeof(char*) on such platforms. Can something similar happen with pointers to non-union clas

指针的大小可以不是

我知道有些硬件平台需要更多的信息来指向一个char不是你需要指向一个int (该平台具有不可寻址的字节,所以指向char的指针需要存储指向一个字的指针,也是一个索引单词中的一个字节)。 所以在这样的平台上有可能sizeof(int*) < sizeof(char*) 。 指向非联合类的指针可能会发生类似情况吗? C ++允许虚函数上的协变返回类型。 假设我们有这样的课程: struct Gadget { // some content }; struct Widget { virtual

c++

I need to build a simple non-commercial tool (dealing with Windows GDI API) on Win64 for Win64 (no cross compilation). MinGW seems the best option for me. I have already used the 32 bit version in the past, as for 64-bit, can you tell me the main differences between the following builds?: Mingw-w64 TDM-GCC Besides the classic MinGW32 used a straightforward tool, mingw-get.exe , to custom

C ++

我需要在Win64上为Win64(不交叉编译)构建一个简单的非商业工具(处理Windows GDI API)。 MinGW对我来说似乎是最好的选择。 我过去已经使用过32位版本,至于64位版本,你能告诉我下列版本之间的主要区别吗?: MinGW的-W64 TDM-GCC 除了经典的MinGW32使用一个简单的工具, mingw-get.exe ,来定制设置并跟上更新周期。 现在哪个是等效的? 我已经在这里发布了MinGW / MinGW-w64 / TDM-GCC的简要概述:Orwell的MinG

How to write on a virtual webcam in Linux?

I want to capture a video from a real webcam, apply filters with openCv and write the filtered video on a virtual webcam, to stream it on web. I don't have problem with the first 2 points, but I don't know how I can write on a virtual webcam. It's possible? How can I do it? I use openCv with C++ on Debian . Thanks Well, actually this is possible. A quick and dirty way to d

如何在Linux上的虚拟摄像头上写字?

我想从一个真实的网络摄像头捕捉视频,使用openCv应用滤镜,并将过滤后的视频写入虚拟摄像头,在网络上进行流式传输。 我对前2分没有问题,但我不知道如何在虚拟摄像头上写字。 这是可能的? 我该怎么做? 我在Debian上使用openCv和C ++ 。 谢谢 那么,实际上这是可能的。 一个快速而肮脏的方法是使用WebcamStudio。 这将创建一个新的视频设备(例如/ device / video2),其他程序将其视为普通视频设备,并可从桌面

OpenCV(programmed in C++) stdout piped to ffmpeg(in bashscript)?

I am using the following bash script to pipe the output of OpenCV which is an out.avi file converting that file to a stdout using the tail command and piping the output to ffmpeg ./OpenCV & tail -n +0 -f out.avi | ffmpeg -i pipe:0 -hls_time 1 -hls_list_size 0 -hls_wrap 10 -hls_segment_filename '%03d.ts' stream.m3u8 This works but causes latency issues. I have tried to change the C++ c

OpenCV(用C ++编程)stdout传递给ffmpeg(在bashscript中)?

我使用下面的bash脚本来管理OpenCV的输出,它是一个out.avi文件,使用tail命令将该文件转换为标准输出,并将输出管道输送到ffmpeg ./OpenCV & tail -n +0 -f out.avi | ffmpeg -i pipe:0 -hls_time 1 -hls_list_size 0 -hls_wrap 10 -hls_segment_filename '%03d.ts' stream.m3u8 这可行,但会导致延迟问题。 我曾尝试更改C ++代码,以便使用cout << frame;将帧写入stdout cout << frame; 这里是一些代

Virtual Webcam Driver

I want to develop a virtual webcam driver which from User mode I'll pass image to it and it will display as webcam output. I don't want to use DirectX filter and CSourceStream etc. Because they don't work on some programs which doesn't use DirectX for capturing webcam image. I have to write a kernel mode device driver so. Any ideas? I tried testcap from DDK samples, but it

虚拟摄像头驱动程序

我想开发一个虚拟的网络摄像头驱动程序,从用户模式我会传递图像到它,它会显示为摄像头输出。 我不想使用DirectX过滤器和CSourceStream等,因为它们不适用于某些不使用DirectX捕捉网络摄像头图像的程序。 我必须编写一个内核模式设备驱动程序。 有任何想法吗? 我尝试了DDK示例中的testcap,但它不处理来自用户模式的图像,并且没有得到任何输入,只是它在网络摄像机中显示7种颜色... 任何帮助将不胜感激。 谢谢 谢

FFMPEG Set Webcam Encoder C++

I'm trying to capture a webcam stream using the FFMPEG C API in windows. I can do what I want using the following command line options: ffmpeg -f dshow -vcodec mjpeg -s 1280x720 -framerate 30 -i video=HX-A1:audio="Microphone (HX-A1)" outputFile.mpg I've started out with the transcoding.c example and got it working for recording a virtual webcam like screen-capture-recorder. However, I

FFMPEG设置摄像头编码器C ++

我试图在Windows中使用FFMPEG C API捕获网络摄像头流。 我可以使用以下命令行选项来执行我想要的操作: ffmpeg -f dshow -vcodec mjpeg -s 1280x720 -framerate 30 -i video=HX-A1:audio="Microphone (HX-A1)" outputFile.mpg 我已经开始使用transcoding.c示例,并开始使用它来记录像捕获记录器这样的虚拟摄像头。 但是,我需要为我的真实摄像头设置编码器选项,因为它默认为160x120原始视频,而我更喜欢更高的分辨率。 我