Re: [FFmpeg-devel] [PATCH 1/2] configure: Remove a redundant check for UWP mode

["Martin Storsjö" <martin@martin.st>]

On Fri, 22 Dec 2023, Wu, Tong1 wrote:

>> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of
>> Martin Storsjö
>> Sent: Friday, December 22, 2023 4:41 PM
>> To: FFmpeg development discussions and patches <ffmpeg-
>> devel@ffmpeg.org>
>> Subject: Re: [FFmpeg-devel] [PATCH 1/2] configure: Remove a redundant check
>> for UWP mode
>>
>> On Fri, 22 Dec 2023, Wu, Tong1 wrote:
>>
>>>
>>>> Subject: [FFmpeg-devel] [PATCH 1/2] configure: Remove a redundant check
>> for
>>>> UWP mode
>>>>
>>>> The check for UWP mode was duplicated from right above, in
>>>> d54127c41a81cf2078a3504f78e0e4232cfe11b7.
>>>>
>>>> Also, instead of several lines with "enabled uwp && ...", make one
>>>> "if enabled uwp; then" block.
>>>> ---
>>>> configure | 30 +++++++++++-------------------
>>>> 1 file changed, 11 insertions(+), 19 deletions(-)
>>>>
>>>> diff --git a/configure b/configure
>>>> index af0bebc1ac..69b755f274 100755
>>>> --- a/configure
>>>> +++ b/configure
>>>> @@ -7102,9 +7102,8 @@ fi
>>>>
>>>> check_func_headers "windows.h" CreateDIBSection
>>>> "$gdigrab_indev_extralibs"
>>>>
>>>> -# d3d11va requires linking directly to dxgi and d3d11 if not building for
>>>> -# the desktop api partition
>>>> -test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
>>>> +# check if building for desktop or uwp
>>>> +test_cpp <<EOF && enable uwp
>>>> #ifdef WINAPI_FAMILY
>>>> #include <winapifamily.h>
>>>> #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
>>>> @@ -7117,23 +7116,16 @@ test_cpp <<EOF && enable uwp &&
>>>> d3d11va_extralibs="-ldxgi -ld3d11"
>>>> #endif
>>>> EOF
>>>>
>>>> -# vaapi_win32 requires linking directly to dxgi if not building for
>>>> -# the desktop api partition
>>>> -test_cpp <<EOF && enable uwp && vaapi_win32_extralibs="-ldxgi"
>>>> -#ifdef WINAPI_FAMILY
>>>> -#include <winapifamily.h>
>>>> -#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
>>>> -#error desktop, not uwp
>>>> -#else
>>>> -// WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
>>>> -#endif
>>>> -#else
>>>> -#error no family set
>>>> -#endif
>>>> -EOF
>>>> +mediafoundation_extralibs="-lmfuuid -lole32 -lstrmiids"
>>>>
>>>> -# mediafoundation requires linking directly to mfplat if building for uwp
>> target
>>>> -enabled uwp && mediafoundation_extralibs="-lmfplat -lmfuuid -lole32 -
>>>> lstrmiids" || mediafoundation_extralibs="-lmfuuid -lole32 -lstrmiids"
>>>> +if enabled uwp; then
>>>> +    # In UWP mode, we can't use LoadLibrary+GetProcAddress to
>> conditionally
>>>> +    # try to load these APIs at runtime, like we do in regular desktop mode -
>>>> +    # therefore, we need to link directly against these APIs.
>>>> +    d3d11va_extralibs="-ldxgi -ld3d11"
>>>> +    vaapi_win32_extralibs="-ldxgi"
>>>> +    mediafoundation_extralibs="-lmfplat $mediafoundation_extralibs"
>>>> +fi
>>>>
>>>> enabled libdrm &&
>>>>     check_pkg_config libdrm_getfb2 libdrm "xf86drmMode.h"
>>>> drmModeGetFB2
>>>> --
>>>> 2.34.1
>>>
>>> LGTM, thx.
>>
>> Does that cover patch 2/2, which fixes linking errors in the UWP
>> configurations, as well?
>>
>> // Martin
>
> From the code it looks good to me but I don't have the UWP test 
> environment to try out.

Well it fixes linking at least, so that's better than failing to link, so 
I'll go ahead and push it to unbreak those builds.

// Martin
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