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How to add cpp file to SDL |  |
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ancientli
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I want to add video capture to SDL 2.0.5. On Windows, it is based on DirectShow, and DirectShow require to use a lot of class, for example IFilter, IPin. But when I add them to SDL, compile successfully, link fail.
Below is some error information. 1>vtrans.obj : error LNK2001: unresolved external symbol __purecall 1>winctrl.obj : error LNK2001: unresolved external symbol __purecall 1>transip.obj : error LNK2001: unresolved external symbol "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) 1>winutil.obj : error LNK2001: unresolved external symbol "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) 1>transip.obj : error LNK2001: unresolved external symbol _memcpy How to resolve it? |
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How to add cpp file to SDL | |
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Ryan C. Gordon
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You probably need to link against Microsoft's C++ runtime. SDL's Visual Studio project files don't link against _any_ C or C++ runtime at all (we implement our own malloc() using Win32 calls directly, etc). This is not my area of expertise, but it's probably just a simple change in the project files to fix this (but if you're planning on submitting this as a patch for SDL, we can't take in a C++ dependency). Alternately: I presume DirectShow is a COM interface; you can call these from C with some magic macros. Here's an example of calling some IDirectSound methods, to see this sort of thing in action: https://hg.libsdl.org/SDL/file/18f1e8b0737d/src/audio/directsound/SDL_directsound.c#l210 --ryan. _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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How to add cpp file to SDL | |
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ancientli
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With my ability, I have to give up adding cpp file temporarily.
Very much hope that SDL can support capture video! -----Original Message----- From: SDL [mailto:] On Behalf Of Ryan C. Gordon Sent: Sunday, November 27, 2016 2:39 PM To: SDL Development List Subject: Re: [SDL] How to add cpp file to SDL
You probably need to link against Microsoft's C++ runtime. SDL's Visual Studio project files don't link against _any_ C or C++ runtime at all (we implement our own malloc() using Win32 calls directly, etc). This is not my area of expertise, but it's probably just a simple change in the project files to fix this (but if you're planning on submitting this as a patch for SDL, we can't take in a C++ dependency). Alternately: I presume DirectShow is a COM interface; you can call these from C with some magic macros. Here's an example of calling some IDirectSound methods, to see this sort of thing in action: https://hg.libsdl.org/SDL/file/18f1e8b0737d/src/audio/directsound/SDL_direct sound.c#l210 --ryan. _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org _______________________________________________ SDL mailing list http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org |
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