Blackmagic Forum

I just downloaded the Blackmagic Decklink SDK. However, the include files and the examples are separated in "Linux", "Windows" and "Mac" categories.

Besides, the Windows "include" files are idl (non-portable microsoft headers for COM, instead of C++ include files).

Is there an example or a recommended way to develop a multiplatform application? I need to support at least Windows and Linux.

Thank you.

Hi Pere,

Have a look at the code samples in the Examples directory for full cross-platform samples. In addition the ClosedCaptions and DeviceConfigure samples have a similar codebase, differing only by platform specific code.

A few pointers from cross-platform development:

• If you are using Visual Studio, by default the MIDL compiler is configured to output header as DeckLinkAPI_h.h, change this to output DeckLinkAPI.h
• Use _WIN32, __APPLE__ and __linux__ pragmas for platform specific code
• Win32 variant needs to call CoInitialize/CoUninitialize for COM
• Include <stdint.h> in Win32 variant to use uint32_t, int64_t, etc
• Win32 headers uses BOOL, macOS/Linux use C++ bool. Keep this in mind when calling functions that output boolean such as GetFlags().
• For strings, Win32 uses BSTR, Linux: const char*, macOS: CFStringRef. In the DeviceConfigure sample, platform.h includes helper functions to convert to std::string

I hope this helps

Kind Regards
Cameron

Thank you very much, Cameron.

I think this is enough.

Best regards.