[FFmpeg-devel] PRIx64 and msvc

[Hendrik Leppkes]

On Wed, Mar 8, 2023 at 5:34 PM <info at gardinal.net> wrote:
>
> Le 2023-03-08 09:10, Hendrik Leppkes a écrit :
> > On Wed, Mar 8, 2023 at 4:02 PM <info at gardinal.net> wrote:
> >>
> >> I'm compiling with msvc and get some errors with PRIx64 and similars.
> >> For example:
> >> snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
> >>
> >> won't compile, but this work (with the extra space):
> >> snprintf(name, sizeof(name), "0x%" PRIx64, ch_layout);
> >>
> >> Can this be included in the sources without introducing problems for
> >> other platforms?
> >
> > You'll have to provide more information. We have automated builds with
> > MSVC which are running just fine right now.
> >
> > - Hendrik
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>
> For example, in ffplay.c sample (ffmpeg version 5.0.2):
>
> if (is->audio_filter_src.channel_layout)
>          snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
>                   ":channel_layout=0x%"PRIx64,
> is->audio_filter_src.channel_layout);
>
> gives the following error:
> error C3688: invalid literal suffix 'PRIx64'; literal operator or
> literal operator template 'operator ""PRIx64' not found
>
> The error is gone when adding a space before PRIx64.
>
> Note that I'm mixing C and C++ in my projet. Compiling in plain C seems
> to work.

This is C code, it has to be compiled as C. You can set this for every
individual file in MSVC if you have to.

We cannot support modifications or custom projects, of course.

- Hendrik