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https://bugzilla.gnome.org/show_bug.cgi?id=705156

Calling gst_buffer_get_size represented 2/3 of the cost of helper_find_peek
which was called whenever a typefindfunction wanted to peek at data.

We already know the size (from the GstMapInfo), so just use that.

Tweak the documentation slightly to clarify that the estimated-total in
a a Buffering query the total remaining time of a download, not the
total time for the complete download. Also indicate the unit used.

https://bugzilla.gnome.org/show_bug.cgi?id=704934

When asked about the scheduling flags first check with upstream and
simply add the _SEEKABLE flag when using a temporary file as storage.

This enables the forwarding of _SEQUENTIAL and _BANDWIDTH_LIMITED from
sources if needed.

https://bugzilla.gnome.org/show_bug.cgi?id=704927

The values should be in stream-time, and start/stop should not
be swapped for negative rates.

There might be a short read at EOS.

Use the same seqnum as the seek for flushes/segments that are
caused by the seek. Also do the same for segment events

Fixes #676242

Fixes uninitialized use of these variables.

Interfaces can have new members added without breaking ABI, so
remove it from the check.

https://bugzilla.gnome.org/show_bug.cgi?id=623799

This is copy pasted from upstream libcheck

Ideally all elements would implement handling of that to get proper
stream-start message handling and other things.

A new active pad might not be notified in some cases, which results
in the current track number not being set in playbin.

The active-pad notification is only sent in the chain and sink_event
functions, and only when the buffer or event that triggered the active
pad selection is from the newly activated pad. So in the other case
the notification will never be sent.

https://bugzilla.gnome.org/show_bug.cgi?id=704691

https://bugzilla.gnome.org/show_bug.cgi?id=704408

If all stream-start messages had a group id (for backwards compatibility),
we only consider a stream started if all had the same group id.

In 2.0 we should make the group id mandatory.

All streams that have the same group id are supposed to be played
together, i.e. all streams inside a container file should have the
same group id but different stream ids. The group id should change
each time the stream is started, resulting in different group ids
each time a file is played for example.

This allows to explicitely set the debug output color
mode to UNIX on every platform, enable it (use platform
default color mode) or enable it.

https://bugzilla.gnome.org/show_bug.cgi?id=674320

Fixes #674320

Fixes #674320

https://bugzilla.gnome.org/show_bug.cgi?id=703499

Include regression test

API: gst_adapter_take_fast()