Re: [FFmpeg-devel] [PATCH 2/2] libavutil/hwcontect_cuda: add option to use current CUDA context

[Timo Rothenpieler <timo@rothenpieler.org>]

On 19/09/2023 10:18, Roman Arzumanyan wrote:
> Hello,
> Any updates on this patch?

Haven't had time to look at it closely or test it yet.
Looks generally okay though.

> чт, 14 сент. 2023 г. в 19:52, Roman Arzumanyan 
> <r.arzumanyan@visionlabs.ai <mailto:r.arzumanyan@visionlabs.ai>>:
> 
>     Got it, thanks.
>     Please find the patches in attachment.
> 
>     Just for my own understanding - could you please explain how this
>     magic works in the configure script? I mean this section:
> 
>     if ! disabled ffnvcodec; then
> 
>     ffnv_hdr_list="ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h
>     ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h"
> 
>     check_pkg_config ffnvcodec "ffnvcodec >= 12.1.14.0" "$ffnv_hdr_list"
>     "" || \
> 
>     check_pkg_config ffnvcodec "ffnvcodec >= 12.0.16.0ffnvcodec < 12.1"
>     "$ffnv_hdr_list" "" || \
> 
>     check_pkg_config ffnvcodec "ffnvcodec >= 11.1.5.2 ffnvcodec < 12.0"
>     "$ffnv_hdr_list" "" || \
> 
>     check_pkg_config ffnvcodec "ffnvcodec >= 11.0.10.2 ffnvcodec < 11.1"
>     "$ffnv_hdr_list" "" || \
> 
>     check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.14 ffnvcodec < 8.2"
>     "$ffnv_hdr_list" ""
> 
>     fi
> 
> 
>     To me it looks like any ffnvcodec package of version in range
>     between 8.1.24.14 and 12.1.14.0 will pass this check.
> 
>     чт, 14 сент. 2023 г. в 18:04, Timo Rothenpieler
>     <timo@rothenpieler.org <mailto:timo@rothenpieler.org>>:
> 
>         On 14/09/2023 17:02, Roman Arzumanyan wrote:
>          > Hi Timo,
>          >
>          >  > The usual approach is to rely on the ffnvcodec version.
>          >  > Whenever you need a function from a specific version, bump
>         the
>          > versions in configure to the current version from git master
>         and all the
>          > respective old branches, since that will be the version of
>         the next release.
>          >
>          > Sorry, but I don't understand what to do. Could you please
>         give me a hand?
>          > There's ffnvcodec.pc.in <http://ffnvcodec.pc.in>
>         <http://ffnvcodec.pc.in <http://ffnvcodec.pc.in>> file where I
>         can bump
>          > the version from 12.1.14.0 to 12.1.14.1
> 
>         Don't bump it. It gets bumped after every release.
>         Just set the versions in configure to the current version from the
>         various branches.
> 
>          > Then I see this check in ffmpeg/configure:
>          >
>          > if ! disabled ffnvcodec; then
>          >
>          > ffnv_hdr_list="ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h
>          > ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h"
>          >
>          > check_pkg_config ffnvcodec "ffnvcodec >= 12.0.16.0"
>         "$ffnv_hdr_list" "" || \
>          >
>          > check_pkg_config ffnvcodec "ffnvcodec >= 11.1.5.2 ffnvcodec <
>         12.0"
>          > "$ffnv_hdr_list" "" || \
>          >
>          > check_pkg_config ffnvcodec "ffnvcodec >= 11.0.10.2 ffnvcodec
>         < 11.1"
>          > "$ffnv_hdr_list" "" || \
>          >
>          > check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.14 ffnvcodec
>         < 8.2"
>          > "$ffnv_hdr_list" ""
>          >
>          > fi
>          >
>          >
>          > Under the hood it adds cflags detected by pkg-config via
>          > check_pkg_config function. But in the ffnvcodec.pc we don't
>         export any
>          > extra cflags.
>          >
>          > Do I have to add extra flags to ffnvcodec.pc.in
>         <http://ffnvcodec.pc.in>
>          > <http://ffnvcodec.pc.in <http://ffnvcodec.pc.in>>to define
>         symbols containing the full
>          > ffnvcodecpackage version?
>          >
>          > Like NVENC_API_MAJOR_VERSIONand NVENC_API_MINORversion but
>         for the whole
>          > ffnvcodec package?
> 
>         If configure depends on the latest versions, there is no need for
>         further checks.
> 
> 
> 
>     -- 
>     --
>     С уважением, Роман Арзуманян.
>     Главный разработчик по направлению видео аналитики.
> 
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