[FFmpeg-devel] [PATCH]Fix dxva2 detection

Ramiro Polla ramiro.polla at gmail.com
Tue Sep 13 20:17:33 CEST 2011

On Mon, Sep 12, 2011 at 9:51 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
> On Mon, Sep 12, 2011 at 09:20:08PM -0300, Ramiro Polla wrote:
>> On Mon, Sep 12, 2011 at 6:56 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
>> > I needed this patch on Win64, any objections?
>> > See libavcodec/dxva2_internal.h, line 26.
>> >
>> > Please comment, Carl Eugen
>> The only issue I know of while detecting dxva2 with mingw-w64 is
>> caused by this line:
>> check_struct dxva2api.h DXVA_PictureParameters wDecodedPictureIndex
>> This is related to dxva2api.h provided by videolan. This struct was
>> added at some point at the same time vc1 dxva2 was added to FFmpeg. To
>> prevent builds failing when people used the old version of dxva2api.h,
>> this check was added to configure in r21444.
>> I don't think anyone still has that old version of dxva2api.h from
>> videolan. mingw-w64 should be used instead of mingw32, and mingw-w64
>> contains a proper dxva2api.h, which is properly detected by configure
>> as-is. The only issue is that vc1 dxva2 is not enabled in mingw-w64
>> because that check lacks -D_WIN32_WINNT=0x0600. I suggest that check
>> be removed (r21444 be reverted).
> if you want me to revert it, just say so

Please do.

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