Working on implementing a CODEC
As I mentioned last week, I would be sharing a test implementation of a CODEC built for the WindowsCodecs extensibility system. This work is progressing along nicely... the CODEC is full written and working. However, there were a few snags that I hit... which, unfortunately, are snags that will be hit by others as well. Here are the work-arounds for the two issues:
- WINCODEC_SDK_VERSION is incorrect. In the wincodec.h that is shipped with the WinFX Beta 1 SDK, this version is set to 0x0228. The correct version is 0x0229.
On line 213 of wincodec.h, replace:
#define WINCODEC_SDK_VERSION 0x0228
with
#define WINCODEC_SDK_VERSION 0x0229
- If you #include <wincodec.h> you'll get build errors:
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.
.
c:\program files\microsoft sdks\winfx\include\wincodec.h(463) : error C2061: syntax error : identifier '__RPC__in'
c:\program files\microsoft sdks\winfx\include\wincodec.h(466) : error C2061: syntax error : identifier '__RPC__inout'
c:\program files\microsoft sdks\winfx\include\wincodec.h(473) : error C2061: syntax error : identifier '__RPC__out'
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.
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In order to work-around this, please download the rpcsal.h and on line 32 of wincodec.h add:
#include "rpcsal.h"
Alternatively, you can get the updated wincodec.h and rpcsal.h from here.
As for the CODEC itself, I should have it up here by the end of the week. It's code complete, I just need to write it up a bit before I post it.
Robert has been at Microsoft since August 2003. He has worked on WPF Imaging, Media, and Effects, and Windows Vista (in the form of the Windows Imaging Component). He is currently the test lead for the Windows Imaging Component.
