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
```
../validate/plugins/flow/formatting.c: In function 'format_number':
../validate/plugins/flow/formatting.c:68:22: error: unknown conversion type character 'l' in format [-Werror=format=]
sprintf (dest_str, "%" G_GUINT64_FORMAT, number);
^~~
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 /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/include/gstreamer-1.0/gst/gst.h:27,
from ../validate/plugins/flow/formatting.h:26,
from ../validate/plugins/flow/formatting.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"
^
../validate/plugins/flow/formatting.c:68:22: error: too many arguments for format [-Werror=format-extra-args]
sprintf (dest_str, "%" G_GUINT64_FORMAT, number);
^~~
../validate/plugins/flow/formatting.c:68:22: error: unknown conversion type character 'l' in format [-Werror=format=]
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 /builds/nirbheek/cerbero/cerbero-build/dist/windows_x86_64/include/gstreamer-1.0/gst/gst.h:27,
from ../validate/plugins/flow/formatting.h:26,
from ../validate/plugins/flow/formatting.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"
^
../validate/plugins/flow/formatting.c:68:22: error: too many arguments for format [-Werror=format-extra-args]
sprintf (dest_str, "%" G_GUINT64_FORMAT, number);
^~~
```
Needed for https://gitlab.freedesktop.org/gstreamer/cerbero/merge_requests/419
Added two properties to the plugin:
* ignored-event-types: A list of event types to be ignored when logging events
* logged-event-types: A list of event types to be logged when logging events
This commits also moves the "ignored-event-fields" property to using a proper
GstValueList for the list of event fields to be taken into account, instead
of the home grown separated by comas list of string, making the API more
uniform.
This also adds a simple helper method: `gst_validate_utils_get_strv`
validateflow can be used to check the buffers and events flowing through
a custom pipeline match an expectation file. This can be used to test
non-regular-playback use cases like demuxers handling adaptive streaming
fragment pushing.
This patch includes also new actions used for these cases:
`appsrc-push`, `appsrc-eos` and `flush` (plus `checkpoint`, which is
only available with validateflow).
