We do not have a way to know the format modifiers to use with string
functions provided by the system. `G_GUINT64_FORMAT` and other string
modifiers only work for glib string formatting functions. We cannot
use them for string functions provided by the stdlib. See:
https://developer.gnome.org/glib/stable/glib-Basic-Types.html#glib-Basic-Types.description
F.ex.:
```
../tools/gst-stats.c:921:11: error: too many arguments for format [-Werror=format-extra-args]
printf ("Number of Buffers passed: %" G_GUINT64_FORMAT "\n", num_buffers);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../tools/gst-stats.c:922:11: error: unknown conversion type character 'l' in format [-Werror=format=]
printf ("Number of Events sent: %" G_GUINT64_FORMAT "\n", num_events);
^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/include/glib-2.0/glib/gtypes.h:32,
from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/include/glib-2.0/glib/galloca.h:32,
from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/include/glib-2.0/glib.h:30,
from ../gst/gst.h:27,
from ../tools/tools.h:28,
from ../tools/gst-stats.c:30:
/builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/lib/glib-2.0/include/glibconfig.h:69:28: note: format string is defined here
#define G_GUINT64_FORMAT "llu"
^
```
and
```
../tests/misc/netclock-replay.c: In function 'main':
../tests/misc/netclock-replay.c:98:23: error: unknown conversion type character 'l' in format [-Werror=format=]
if (sscanf (line, "%" G_GUINT64_FORMAT " %" G_GUINT64_FORMAT " %"
^~~
In file included from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86/include/glib-2.0/glib/gtypes.h:32,
from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86/include/glib-2.0/glib/galloca.h:32,
from /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86/include/glib-2.0/glib.h:30,
from ../tests/misc/../../libs/gst/net/gstntppacket.c:38,
from ../tests/misc/netclock-replay.c:31:
/builds/nirbheek/cerbero/cerbero-build/dist/windows_x86/lib/glib-2.0/include/glibconfig.h:69:28: note: format string is defined here
#define G_GUINT64_FORMAT "llu"
^
```
This is needed for upgrading glib inside Cerbero which builds with
`-Werror` on Windows:
https://gitlab.freedesktop.org/gstreamer/cerbero/merge_requests/419
In file included from ../../libs/gst/net/gstntppacket.c:35:0,
from netclock-replay.c:25:
../../config.h:546:0: error: "__MSVCRT_VERSION__" redefined [-Werror]
#define __MSVCRT_VERSION__ 0x0601
In file included from /usr/x86_64-w64-mingw32/sys-root/mingw/include/crtdefs.h:10:0,
from /usr/x86_64-w64-mingw32/sys-root/mingw/include/stdio.h:9,
from netclock-replay.c:21:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/_mingw.h:220:0: note:
this is the location of the previous definition
# define __MSVCRT_VERSION__ 0x0700
https://bugzilla.gnome.org/show_bug.cgi?id=774108
This takes readings in the form of ...
<local_1> <remote_1> <remote_2> <local_2>
... with one observation per line, and then replays it using the
netclientclock code.
The output is the statistics structure emitted by the netclientclock,
which can then be analysed and tuned once we get those readings for
potential edge-cases.
It should be possible to find some inputs with "bad" data and convert
this into a unit test for future tweaks to run against.
