Stay on safe side, use only one header file.
Other header is located at xbmc/linux/ and seem to be more accurate.
AE: Revisit Device Opening. Try to set periodSize of 100 ms and BufferSize of 800 ms
Merge pull request #2236 from stupid-boy/DllOmx_h

[RPI,OMX] Delete duplicated DllOMX.h header file
Merge pull request #2320 from fritsch/ae-period-size

AE: Revisit Period Size, Period and Buffersize
fixed: Some http servers provide different content when the range request header is not set causing seeking to fail. To fix this use CURL_OPT_RANGE method instead of CURLOPT_RESUME_FROM_LARGE
Merge pull request #2187 from arnova/curl_seek_fix

changed: Some (Silverlight) servers don't play nice with CURLOPT_RESUME_...