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If no providers for a particular class could be found, then removing unmatched
filters would cause all devices to be returned instead which is not at all what
the user intended. We still return 0 for unmatched filters.

Error was not released if gst_ntp_packet_receive failed.

https://bugzilla.gnome.org/show_bug.cgi?id=760598

Other gst libraries and/or elements may want to add some debug logging to an
external debug system or implement delayed debugging for performance reasons.

Exposes the internal __gst_vasprintf as gst_info_vasprintf which has a fallback
to g_vasprintf if the debug system is disabled.

API: gst_info_vasprintf
API: gst_info_strdup_vprintf
API: gst_info_strdup_printf

https://bugzilla.gnome.org/show_bug.cgi?id=760421

Currently, the query values are being set even if the query itself was
determined to have failed. Fix this to ensure the values are only set in
case of a query success.

https://bugzilla.gnome.org/show_bug.cgi?id=760479

Drop some trailing whilespace. Make field order consistent.

Big suprise - GstStructure is faster than GVariant.

https://bugzilla.gnome.org/show_bug.cgi?id=745939

GstControlSourceGetValue() value paramater is a gdouble, not a GValue
and GstControlSourceGetValueArray doesn't return a GstValueArray but
an array of double.

https://bugzilla.gnome.org/show_bug.cgi?id=758668

In post hooks always pass the return value as the last param. Pass the query
also to post hooks since it is still alive.

We changed the define, but left the comment inconsistent.

Document all tracer hook function pointer together with the detail string that
one needs to use with gst_tracing_register_hook().

Previously we used the latter one still for the tracer utility code, causing
undefined references in the resulting binary if the debugging system was
disabled but the tracer system not.

It's used by the debugging and tracer subsystem and in various files, make it
a central thing that is initialized independ of the existence of those
subsystems.

Remove the _hook_id() methods we made internal in the prev commit.

The function always returns TRUE right now, so atleast log something.

https://bugzilla.gnome.org/show_bug.cgi?id=755971

Macro expansion means we might calculate the fill level once
for the check and then possibly again for the return value.

Based on patch by: Aleksander Wabik <awabik@opera.com>

https://bugzilla.gnome.org/show_bug.cgi?id=755971

We don't need to expose this as public API. Change the only plugin that was
using it.

Instance docs don't need to docuemnt the parent (first member).

The IGNORE_H_FILES can only contain files or dirs.

Add new and documented api reported in -unused.txt to -section.txt.

Exclude gst/printf/*.h and a few generated .h files from the api-scan. This
makes -unused.txt report file from gtkdoc useful again.

Document this, for 2.0 we should just remove that parameter.

We already have gst_clock_adjust_with_calibration() and
gst_clock_unadjust_unlocked(), having the other variant is useful.

Also address warnigns regarding the unstable tracer api.

Add GstTracer and GstTracerFactory to the core docs.

This is internal code, that is only to be used in core.

This was previously done via {enable,disable}-gst-debug. Since both subsystems
are independent having separate options is better.

clocked -> clock

Not from the external one.