Move MT safety to main description (it does not belong to Return: or Since:
statement). Add a few missing return docs. Downgrade a normal comment froma doc
comment. Fix a doc header to only contain symbol name.
Reuse buffer code for bufferlists. Not sure if this measurably impacts performance
for the simple buffer case, if it does after doing some benchmarks, we can
decouple it later.
Fixes#572285
Post a stream-status message indicating that a new task was created so that the
application has a chance to change the properties of the task.
Fix unit test to take into account the new ref of the message.
Move the gst_pad_can_link() implementation from gstutils to gstpad and use
gst_pad_link_prepare() to make it work correctly and also check the caps.
Make the broken implementation in gstutils static.
Small cleanups in the _get_fixed_caps() function.
Fixes#575682.
Keep track of when a new callback is installed in the callback and call the new
callback in that case.
Add unit test for checking pad blocking.
Fixes#573823.
When de/activating a pad in pull mode the pad needs to de/activate the
peer pad it is connected to, failure to be able to do this in activation mode
is an error.
However if there is no peerpad, we can still deactivate the pad correctly and
assume the application will deactivate the unlinked peer pad eventually.
Fixes#574163.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_configure_src):
When we use gst_pad_alloc_buffer() without wanting to set the caps we
also don't need to check if the caps are compatible because the caller
presumably is going to perform its own custom checks. Fixes some cases
where basetransform elements would error out when it was not needed.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_get_range), (gst_pad_pull_range):
Revert a patch from 21 months ago that broke caps negotiation in pull
mode. Basically, having a buffer pass over a pad will trigger the
setcaps function when caps change, just like in push mode.
Original commit message from CVS:
Base on Patch by: Olivier Crete <tester at tester dot ca>
* gst/gstbin.c: (gst_bin_init), (gst_bin_add_func),
(gst_bin_remove_func), (update_degree),
(gst_bin_sort_iterator_new), (gst_bin_handle_message_func):
Keep track of pads that are being linked/unlinked and resync the state
changes.
* gst/gstpad.c: (gst_pad_get_direction),
(gst_pad_set_chain_function), (gst_pad_set_getrange_function),
(gst_pad_set_checkgetrange_function), (gst_pad_unlink),
(gst_pad_link_prepare), (gst_pad_link),
(gst_pad_event_default_dispatch), (gst_pad_chain), (gst_pad_push),
(gst_pad_check_pull_range), (gst_pad_get_range),
(gst_pad_pull_range):
Some code cleanups, use macros to check pad direction.
Don't need to take the lock on the pad direction.
Post structure change when pads are linked/unlinked.
Change some checks into _return_if_fail().
* tests/check/gst/gstbin.c:
(test_link_structure_change_state_changed_sync_cb),
(GST_START_TEST), (gst_bin_suite):
Add testcase for pad link/unlinke resync during a state change.
Fixes#510354.
Original commit message from CVS:
Patch by: Antoine Tremblay <hexa00 at gmail dot com>
* gst/gstpad.c: (gst_pad_link_check_compatible_unlocked):
Original patch by : Simon Descaries
Fix small refount leak in caps compatibility check.
Fixes#551676.
Original commit message from CVS:
* gst/gstpad.c: (add_unref_pad_to_list),
(gst_pad_get_internal_links_default):
Add fallback when calling the deprecated function on an element that
implements the new internal_link handler.
Original commit message from CVS:
Based on patch by: Olivier Crete <tester at tester dot ca>
* docs/gst/gstreamer-sections.txt:
* win32/common/libgstreamer.def:
* gst/gstpad.c: (gst_pad_init),
(gst_pad_set_iterate_internal_links_function),
(int_link_iter_data_free), (iterate_pad),
(gst_pad_iterate_internal_links_default),
(gst_pad_iterate_internal_links), (gst_pad_get_internal_links):
* gst/gstpad.h:
Add threadsafe replacement functions for getting internal links of an
element. Deprecate the old internal links functions.
API:GstPad::gst_pad_set_iterate_internal_links_function()
API:GstPad::GstPadIterIntLinkFunction
API:GstPad::gst_pad_iterate_internal_links()
API:GstPad::gst_pad_iterate_internal_links_default()
* gst/gstghostpad.c: (gst_proxy_pad_do_iterate_internal_links),
(gst_proxy_pad_init):
Implement threadsafe internal links.
* tests/check/elements/tee.c: (GST_START_TEST), (tee_suite):
Unit test for internal links on tee. See #549504.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_get_internal_links_default):
Make the internal links function less thread-unsafe and add some
comments, dunno why.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_acceptcaps_default),
(gst_pad_configure_src), (gst_pad_alloc_buffer_full):
Remove silly redundant debug.
Add some more debug info.
Clarify the docs regarding new caps received from pad_alloc.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_alloc_buffer_full):
Only sanity-check the buffer size if requested_caps == buffer_caps
(ie. don't take pad caps into account, they're not relevant here)
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_event_default_dispatch):
The default event function on a sinkpad should return TRUE when
there are no internal links but should collect the return values from
the internal links otherwise.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_alloc_buffer_full):
Move size sanity check to the right place: downstream may return
a buffer with a smaller size if the buffer caps are different than
the requested ones, as may happen when doing reverse negotiation.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_buffer_alloc_unchecked):
Add sanity check to make sure we don't get smaller buffers
than requested (and fallback to normal buffer alloc if we do).
Original commit message from CVS:
* gst/gstconfig.h.in:
Add 'id' for example.
* gst/gstpad.c:
* gst/gstutils.c:
* plugins/elements/gstfdsink.c:
Link to signals. Doc and comment fixes.
Original commit message from CVS:
* gst/gstpad.c:
* tests/check/gst/gstpad.c:
Be sure that we have a new copy of the caps and not
reffed caps from a template
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_dispose):
Really unlink the peer pad instead of setting the peer pointer to NULL
when we dispose the pad.
This correctly calls the unlink functions and makes sure that the peer
does not have a handle to invalid memory. See #504671.
* tests/check/gst/gstpad.c: (GST_START_TEST), (gst_pad_suite):
Add testsuite for above case.
Original commit message from CVS:
* docs/gst/gstreamer-sections.txt:
* gst/gstpad.c: (gst_pad_peer_query):
* gst/gstpad.h:
Add function to perform a query on the peer of a pad.
API: gst_pad_peer_query()
Original commit message from CVS:
* docs/design/part-TODO.txt:
Add some more TODO items
* gst/gstbin.c: (find_message), (gst_bin_change_state_func):
Improve debugging.
* gst/gstcaps.c: (gst_caps_intersect):
Optimize trivial intersection case between identical caps pointers.
* gst/gstelement.c: (gst_element_continue_state),
(gst_element_set_state_func):
* gst/gstpad.c:
Fix spelling and grammar mistakes.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_alloc_buffer_full), (gst_pad_push):
Show the caps change in the log to help spotting the case of not
exactly matching caps.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_get_caps_unlocked),
(gst_pad_acceptcaps_default), (gst_pad_configure_sink),
(gst_pad_configure_src):
Added simple version of improved caps checking. It was previously
assumed that a setcaps function would check the validity of the caps but
people prefer us to check caps against the template automatically.
Fixes#421543.
Original commit message from CVS:
* docs/faq/gst-uninstalled:
don't get empty paths on the PATH variables
* gst/gstpad.c (gst_pad_is_active, gst_pad_set_blocked_async):
Don't format for the uncommon terminal width of 84 characters.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_set_caps), (gst_pad_configure_sink),
(gst_pad_configure_src), (gst_pad_alloc_buffer_full),
(gst_pad_chain_unchecked), (gst_pad_push):
Revert last commit. This needs some more thoughts.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_set_caps), (gst_pad_alloc_buffer_full),
(gst_pad_chain_unchecked), (gst_pad_push):
Check in set_caps if the caps are compatible with the pad and remove
two functions that are redundant now. Fixes#421543.
Original commit message from CVS:
Patch by: <syrjala at sci dot fi>
* gst/gstpad.c: (gst_pad_alloc_buffer_full), (gst_pad_send_event):
Fix possible deadlock if pad eventfunc is not specified. Fixes#421177.
Improve debugging.
Original commit message from CVS:
* docs/design/draft-tagreading.txt:
* docs/random/ensonic/audiobaseclasses.txt:
Do some Architect work.
* gst/gstobject.c: (gst_object_set_name):
Add a WARNING.
* gst/gstpad.c:
Add docs that point from gst_pad_get_range to gst_pad_pull_range
Original commit message from CVS:
* docs/design/part-gstghostpad.txt:
* gst/gstghostpad.c: (gst_ghost_pad_dispose),
(gst_ghost_pad_new_full):
Make the ghostpad a parent of the internal pad again for better backward
compatibility. Don't write code that relies on this however.
* gst/gstpad.c: (gst_pad_activate_pull), (gst_pad_activate_push),
(gst_pad_link_check_hierarchy):
Require that parents should be GstElements in the hierarchy check.
Original commit message from CVS:
* docs/design/part-gstghostpad.txt:
* gst/gstghostpad.c: (gst_ghost_pad_class_init),
(gst_ghost_pad_internal_do_activate_push),
(gst_ghost_pad_internal_do_activate_pull),
(gst_ghost_pad_do_activate_push), (gst_ghost_pad_do_activate_pull),
(gst_ghost_pad_do_link), (gst_ghost_pad_dispose),
(gst_ghost_pad_new_full), (gst_ghost_pad_set_target):
Do not set the internal pad as a parent anymore so we can avoid
hierarchy linking errors when the ghostpad has no parent yet. This also
fixes failed activation because of unlinked internal pads, which in
turn fixes the impossible case where you have to activate a pad before
you can add it to a running element.
Also fix the docs.
* gst/gstpad.c: (pre_activate), (post_activate),
(gst_pad_set_active), (gst_pad_activate_pull),
(gst_pad_activate_push), (gst_pad_check_pull_range):
Add some more debug info.
Mark activation mode in pre_activate so that we don't try to activate in
endless loops. Fixes#385084.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_get_internal_links_default),
(gst_pad_dispatcher):
Improve debugging of default pad dispatcher and query functions.
Original commit message from CVS:
2007-01-13 Andy Wingo <wingo@pobox.com>
* gst/gstpad.c (gst_pad_get_range, gst_pad_pull_range): Allow
getrange() to return buffers with other caps, while we fix
demuxers and typefind, or otherwise change part-negotiation.txt.
Original commit message from CVS:
2007-01-12 Andy Wingo <wingo@pobox.com>
* gst/gstpad.c (gst_pad_activate_pull): Refuse to activate unlinked
sink pads in pull mode. In addition to being correct, fixes
filesrc ! decodebin ! identity ! fakesink.
(gst_pad_get_range, gst_pad_pull_range): Don't call
gst_pad_set_caps() if the caps changes; instead error out with
GST_FLOW_NOT_NEGOTIATED, as discussed in part-negotiation.txt.
Original commit message from CVS:
2007-01-10 Andy Wingo <wingo@pobox.com>
* docs/design/part-negotiation.txt: Update with, um, one way that
pull-mode negotiation might work?
* gst/gstpad.h:
* gst/gstpad.c (gst_pad_get_allowed_caps): Remove the restriction
that the pad must be a src pad; makes sense to call it the other
way in pull mode, and the logic is symmetric anyway.
Original commit message from CVS:
2007-01-06 Andy Wingo <wingo@pobox.com>
* gst/gstpad.c (gst_pad_get_range, gst_pad_pull_range): Set caps
on the pads if necessary, as in push()/chain(). Update docs.
Shouldn't affect existing pull() usage as it is currently only
being used on buffers without caps.
Original commit message from CVS:
* gst/gstelement.c: (gst_element_add_pad):
* gst/gstghostpad.c: (gst_ghost_pad_new_full):
* gst/gstpad.c: (gst_pad_init):
Set pads to FLUSHING when they are created. Check, warn and fix when a
demuxer adds an inactive pad to itself when running. Fixes#339326.
Original commit message from CVS:
Patch by: Mark Nauwelaerts <manauw at skynet dot be>
* gst/gstpad.c:
Fix documentation for gst_pad_dispatcher. Fixes#374475.
Original commit message from CVS:
Patch by: Mark Nauwelaerts <manauw at skynet dot be>
* gst/gstpad.c: (gst_pad_init), (pre_activate),
(gst_pad_set_blocked_async), (gst_pad_acceptcaps_default),
(gst_pad_accept_caps), (handle_pad_block), (gst_pad_push_event):
Some small cleanups. Improve debugging.
* gst/gstpad.h:
Signal all waiting threads with a broadcast instead of just one.
Fixes#369942.
Original commit message from CVS:
* docs/design/part-events.txt:
Update some docs.
* docs/design/part-block.txt:
* gst/gstpad.c: (gst_pad_is_blocking), (handle_pad_block),
(gst_pad_push_event):
Revert BLOCKING patch, it tries to be smart without really having a
clear idea what or how. So, now we discard all FLUSHING events again on
a blocking pad. Should fix gnonlin again.
Original commit message from CVS:
* gst/gstelement.h:
Clarify _NO_PREROLL a bit more.
* gst/gstevent.c:
Fix docs.
* gst/gstpad.c: (gst_pad_link_check_hierarchy),
(gst_pad_get_caps_unlocked), (gst_pad_save_thyself),
(handle_pad_block), (gst_pad_push_event), (gst_pad_send_event):
Patch by: Yves Lefebvre <ivanohe at abacom dot com> Fix possible deadlock
due to wrong locking order. Fixes#361769.
Remove some redundant/misplaced checks in pad_block.
* libs/gst/base/gstbasesink.c: (gst_base_sink_get_position):
For negative rates, count backwards from the duration.
Original commit message from CVS:
Patch by: Sebastien Cote <sebas642 at yahoo dot ca>
* gst/gstpad.c: (gst_pad_get_caps_unlocked),
(gst_pad_save_thyself):
Update some docs.
Write pad direction in XML output. Fixes#345496.
Original commit message from CVS:
* docs/design/part-block.txt:
Further explain the use of flushing on blocked pads.
* docs/gst/gstreamer-sections.txt:
* gst/gstpad.c: (gst_pad_is_blocking), (handle_pad_block),
(gst_pad_push_event):
* gst/gstpad.h:
Added new GstPadFlag : GST_PAD_BLOCKING.
Adds the notion of pads really blocking, which enables to properly
handle FLUSH_START/FLUSH_STOP events on blocked pads.
Fixes#358999
API: gst_pad_is_blocking()
API: GST_PAD_IS_BLOCKING() macro
API: GST_PAD_BLOCKING GstPadFlag
Original commit message from CVS:
* gst/gstinfo.c: (_gst_debug_nameof_funcptr):
Fix locking order, handle NULL function values properly.
* gst/gstinfo.h:
Fix docs.
* gst/gstpad.c: (gst_pad_buffer_alloc_unchecked):
Initialised variable before using it and fix debug statement to
print the address of the function rather than the address of the
variable on the stack holding the address of the function.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_start_task), (gst_pad_pause_task),
(gst_pad_stop_task):
Improve debugging for task functions.
* gst/gsttask.c: (gst_task_func), (gst_task_set_lock),
(gst_task_start), (gst_task_pause), (gst_task_join):
Make sure that the task function started and finished after a
join().
Don't try to push the task function on the threadpool multiple
times.
Improve the g_warning message with some useful suggestions
about how to fix the problem.
Original commit message from CVS:
* gst/gst.c:
* gst/gstpad.c: (gst_pad_set_active):
* libs/gst/base/gstbasetransform.c:
(gst_base_transform_transform_caps):
Simplify caps to get rid of duplicates, fixes#345444
Original commit message from CVS:
* gst/gstbuffer.c:
* gst/gsttask.c: (gst_task_join):
Small doc updates.
* gst/gstpad.c: (gst_pad_activate_pull), (gst_pad_activate_push),
(gst_pad_stop_task):
When pad (de)activation failed for some reason, restore the old
activation mode and set the pad to flushing instead of assuming the
pad is deactivated.
If the _task_join() failed, reinstall the task on the pad so that it can
be stopped later and return an error.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_class_init), (gst_pad_dispose),
(gst_pad_get_property), (gst_pad_activate_pull),
(gst_pad_activate_push), (gst_pad_set_blocked_async),
(gst_pad_set_activate_function),
(gst_pad_set_activatepull_function),
(gst_pad_set_activatepush_function), (gst_pad_set_chain_function),
(gst_pad_set_getrange_function),
(gst_pad_set_checkgetrange_function), (gst_pad_set_event_function),
(gst_pad_set_query_function), (gst_pad_set_query_type_function),
(gst_pad_set_internal_link_function), (gst_pad_set_link_function),
(gst_pad_set_unlink_function), (gst_pad_set_getcaps_function),
(gst_pad_set_acceptcaps_function),
(gst_pad_set_fixatecaps_function), (gst_pad_set_setcaps_function),
(gst_pad_set_bufferalloc_function), (gst_pad_link_check_hierarchy),
(gst_pad_get_caps_unlocked), (gst_pad_get_caps),
(gst_pad_peer_get_caps), (gst_pad_accept_caps),
(gst_pad_peer_accept_caps), (gst_pad_set_caps),
(gst_pad_configure_sink), (gst_pad_configure_src),
(gst_pad_get_allowed_caps), (gst_pad_get_negotiated_caps),
(gst_pad_buffer_alloc_unchecked), (gst_pad_alloc_buffer_full),
(gst_pad_query), (gst_pad_load_and_link), (handle_pad_block),
(gst_pad_chain_unchecked), (gst_pad_push), (gst_pad_get_range),
(gst_pad_send_event):
Use _DEBUG_OBJECT when it makes sense.
Protect GST_PAD_CAPS with the OBJECT_LOCK.
Small cleanups and code reflows.
Avoid caps refcounting in _accept_caps.
Refactor alloc_buffer so that the code performed on the peer is in a
separate function. Also if the pad does not implement a buffer alloc
function, we should still check if the pad is flushing before falling
back to the default allocator.
Original commit message from CVS:
* gst/gstbin.c: (activate_pads),
(iterator_activate_fold_with_resync), (gst_bin_src_pads_activate),
(gst_bin_change_state_func):
(de)activate src pads before calling state_change on the childs.
This is to avoid the case where a src ghostpad is blocked (holding the
stream lock), which would block the deactivation of the ghostpad's
target pad.
* gst/gstghostpad.c: (gst_proxy_pad_do_query_type),
(gst_proxy_pad_do_event), (gst_proxy_pad_do_query),
(gst_proxy_pad_do_internal_link), (gst_proxy_pad_do_bufferalloc),
(gst_proxy_pad_do_chain), (gst_proxy_pad_do_getrange),
(gst_proxy_pad_do_checkgetrange), (gst_proxy_pad_do_getcaps),
(gst_proxy_pad_do_acceptcaps), (gst_proxy_pad_do_fixatecaps),
(gst_proxy_pad_do_setcaps), (gst_proxy_pad_set_target_unlocked),
(gst_proxy_pad_set_target), (gst_proxy_pad_get_internal),
(gst_proxy_pad_dispose), (gst_proxy_pad_init),
(gst_ghost_pad_parent_set), (gst_ghost_pad_parent_unset),
(gst_ghost_pad_class_init),
(gst_ghost_pad_internal_do_activate_push),
(gst_ghost_pad_internal_do_activate_pull),
(gst_ghost_pad_do_activate_push), (gst_ghost_pad_do_activate_pull),
(gst_ghost_pad_do_link), (gst_ghost_pad_do_unlink),
(gst_ghost_pad_dispose), (gst_ghost_pad_new_no_target),
(gst_ghost_pad_new), (gst_ghost_pad_set_target):
GhostPads now create their internal GstProxyPad at creation (and not
when they're linked, as it was being done previously).
The internal and target pads are linked straight away.
The data will also travel through the other pad in order to make
pad blocking and probes non-hackish (the probe/block now really happens
on the GhostPad and not on the target).
* gst/gstpad.c: (gst_pad_set_blocked_async),
(gst_pad_link_prepare), (gst_pad_push_event):
Remove previous ghostpad cruft.
* gst/gstutils.c: (gst_pad_add_data_probe),
(gst_pad_add_event_probe), (gst_pad_add_buffer_probe),
(gst_pad_remove_data_probe), (gst_pad_remove_event_probe),
(gst_pad_remove_buffer_probe):
Remove previous ghost pad cruft.
Added more detailed debug statements.
* tests/check/gst/gstghostpad.c: (GST_START_TEST):
Fix the testsuite for refcounting changes.
The comments about who has references were correct, but the refcount
being checked wasn't the same (!?!).
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_init), (gst_pad_activate_pull),
(gst_pad_activate_push):
Use some more macros where it makes sense.
Allow pad mode switching instead of asserting. When a pad
is activated in one mode and we activate it in another,
deactivate it first before activating it in a different mode.
Fixes#329198.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_chain_unchecked), (gst_pad_chain),
(gst_pad_push), (gst_pad_check_pull_range), (gst_pad_get_range),
(gst_pad_pull_range):
* gst/gstpad.h:
Lots of comments and docs added to the pad functions.
Flesh out the expected behaviour of the get_range() functions.
Original commit message from CVS:
* gst/gstpad.c: (handle_pad_block), (gst_pad_push_event):
Implement pad blocking on events according to part-block.txt.
More comments on behaviour.
* tests/check/gst/gstevent.c: (test_event):
Send event to peer pad of blocked pad (else it will block).
Original commit message from CVS:
* gst/gstpad.c: (gst_flow_get_name), (gst_flow_to_quark):
* gst/gstpad.h:
Added _CUSTOM error and success GstFlowReturn that can be
used be elements internally.
Added macro to check for SUCCESS flowreturns.
API: GST_FLOW_CUSTOM_SUCCESS
API: GST_FLOW_CUSTOM_ERROR
API: GST_FLOW_IS_SUCCESS
* tests/check/gst/gstpad.c: (GST_START_TEST), (gst_pad_suite):
Added check for GstFlowReturn sanity.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_set_caps):
Short-circuit gst_pad_set_caps if setting the existing
caps pointer again, and avoid printing debug and
reffing/unreffing the caps.
* plugins/elements/gstqueue.c: (gst_queue_push_one):
There's actually no need to set the caps before pushing -
the acceptcaps method will handle it anyway.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_init), (gst_pad_configure_sink),
(gst_pad_configure_src), (gst_pad_push):
Restore acceptcaps checking behaviour now that good plugins have
been released.
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_link):
Must set peer pads before calling the link function, otherwise
a task started from a link function might get a flow-not-linked
result when trying to push because the other thread where the
linking happens hasn't had a chance to set the peers yet. This
might happen for example when a queue gets linked to a downstream
element, as queue starts a streaming task when its source pad
gets linked. Happens in real life when playing back flac/musepack
files in playbin (#332390).
Original commit message from CVS:
* gst/gstpad.c: (gst_pad_set_property):
Use g_value_get_object() instead of g_value_dup_gst_object(),
to avoid double-reffing the pad template (which we then sink,
so this worked previously if (and only if) the pad template
was floating.
* gst/gstpadtemplate.c: (gst_pad_template_init),
(gst_pad_template_pad_created):
Never return floating references to pad templates, create
them as initially-sunken.
Document an extra function (and make this stop sinking our
pad template, since that is now guaranteed to do nothing,
since we created it sunken).
* gst/gstghostpad.c:
Fix docs typo.
Original commit message from CVS:
2006-04-05 Andy Wingo <wingo@pobox.com>
* gst/gstpad.c (gst_pad_set_blocked_async): More debug.
* libs/gst/base/gstbasetransform.c
(gst_base_transform_sink_eventfunc): When resetting our segment on
FLUSH_STOP, also update the flag saying we haven't seen a
newsegment.
