Original commit message from CVS:
* gst/gstclock.c: (gst_clock_entry_new),
(gst_clock_id_compare_func), (gst_clock_id_wait),
(gst_clock_id_wait_async), (gst_clock_id_unschedule),
(gst_clock_init), (gst_clock_get_internal_time),
(gst_clock_set_master), (do_linear_regression),
(gst_clock_add_observation), (gst_clock_set_property):
* gst/gstclock.h:
Review docs.
Small cleanups.
Fix a possible segfault when the window-size is made smaller.
Calculate jitter before performing the clock wait. Ideally
the clock implementation should calculate jitter but we need
API breakage for that.
* gst/gstsystemclock.c: (gst_system_clock_init):
Docs review.
* libs/gst/base/gstbasesink.c: (gst_base_sink_do_sync):
Remove leftover else
* tests/check/gst/gstsystemclock.c: (GST_START_TEST),
(gst_systemclock_suite):
Added check to test GST_CLOCK_DIFF.
Original commit message from CVS:
* docs/libs/gstreamer-libs-sections.txt:
Added basesink new methods.
* gst/gstevent.c:
* gst/gstevent.h:
Docs updates. Flesh out the QoS docs.
* libs/gst/base/gstadapter.c:
Small doc clarification about ownership and flushing.
* libs/gst/base/gstbasesink.c: (gst_base_sink_set_sync),
(gst_base_sink_get_sync), (gst_base_sink_set_max_lateness),
(gst_base_sink_get_max_lateness), (gst_base_sink_set_property),
(gst_base_sink_get_property), (gst_base_sink_do_sync):
* libs/gst/base/gstbasesink.h:
Added new methods to allow subclass to control max-lateness
and sync.
Generate very basic QoS events based on last sync observation.
Updated docs, fix typo, added some QoS blurb.
* libs/gst/base/gstbasesrc.c:
Remove obsolete _get_state() calls from docs.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_class_init),
(gst_base_sink_init), (gst_base_sink_set_property),
(gst_base_sink_get_property), (gst_base_sink_do_sync):
* libs/gst/base/gstbasesink.h:
Make max-lateness a property.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_wait_clock),
(gst_base_sink_do_sync), (gst_base_sink_render_object):
Don't ever draw a frame that is >10ms late.
Original commit message from CVS:
2006-02-07 Andy Wingo <wingo@pobox.com>
* libs/gst/base/gstcollectpads.c (gst_collect_pads_chain): Only
update last_stop if we're in TIME format and the timestamp is
valid.
* libs/gst/base/gstcollectpads.c (gst_collect_pads_event)
* libs/gst/base/gstbasetransform.c (gst_base_transform_eventfunc):
* libs/gst/base/gstbasesink.c (gst_base_sink_configure_segment):
If we get a new newsegment with a different format, adapt
accordingly.
* gst/gstclock.c (gst_clock_set_calibration): Accept a numerator
of 0. Not a problem, really.
Original commit message from CVS:
2006-02-07 Andy Wingo <wingo@pobox.com>
* libs/gst/base/gstbasesink.c (gst_base_sink_chain_unlocked): Only
warn if sync=true.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_do_sync),
(gst_base_sink_render_object),
(gst_base_sink_queue_object_unlocked):
Only keep track of prerollable items when we are
prerolling.
Before rendering after preroll, always check if we
have queued items.
Added some more debugging.
Original commit message from CVS:
* docs/design/part-element-sink.txt:
Updated document.
* libs/gst/base/gstbasesink.c: (gst_base_sink_init),
(gst_base_sink_finalize), (gst_base_sink_preroll_queue_flush),
(gst_base_sink_configure_segment), (gst_base_sink_commit_state),
(gst_base_sink_get_sync_times), (gst_base_sink_wait_clock),
(gst_base_sink_do_sync), (gst_base_sink_render_object),
(gst_base_sink_preroll_object),
(gst_base_sink_queue_object_unlocked),
(gst_base_sink_queue_object), (gst_base_sink_event),
(gst_base_sink_chain_unlocked), (gst_base_sink_chain),
(gst_base_sink_loop), (gst_base_sink_activate_pull),
(gst_base_sink_get_position), (gst_base_sink_change_state):
* libs/gst/base/gstbasesink.h:
Totally refactored matching the design doc.
Use two segments, one to clip incomming buffers and another to
perform sync.
Handle queueing correctly, bypass the queue when playing.
Make EOS cancelable.
Handle errors correctly when operating in pull based mode.
* tests/check/elements/fakesink.c: (GST_START_TEST),
(fakesink_suite):
Added new check for sinks.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_init),
(gst_base_sink_preroll_queue_empty), (gst_base_sink_commit_state),
(gst_base_sink_handle_object), (gst_base_sink_event),
(gst_base_sink_is_prerolled), (gst_base_sink_wait),
(gst_base_sink_do_sync), (gst_base_sink_handle_event),
(gst_base_sink_handle_buffer), (gst_base_sink_set_flushing),
(gst_base_sink_deactivate), (gst_base_sink_activate),
(gst_base_sink_activate_pull), (gst_base_sink_get_position),
(gst_base_sink_query), (gst_base_sink_change_state):
Basesink cleanups, remove some old code.
Handle the case where a subclass can preroll in the render
method (mostly audiosinks).
Handle more events.
Remove some locks around variables that are now protected
with the PREROLL_LOCK (clock_id, flushing, ..).
Optimize position query some more, do correct locking.
Remove old code to push queue in state change, this is not
needed anymore since preroll blocks on all prerollable items
now.
Almost implemented as described in design doc.
Original commit message from CVS:
2006-01-25 Julien MOUTTE <julien@moutte.net>
* libs/gst/base/gstbasesink.c: (gst_base_sink_get_position):
We only query position using the clock in the playing state.
Query peer in the other cases.
* win32/common/config.h: Updates.
Original commit message from CVS:
* gst/gstsystemclock.c: (gst_system_clock_id_wait_unlocked):
A clock entry that is scheduled for the exact time of the
clock is still in time.
* libs/gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_do_sync):
Add some more debug info.
Original commit message from CVS:
* gst/gstbin.c: (gst_bin_element_set_state):
* gst/gstclock.c: (gst_clock_id_wait):
Added some more debug info.
* libs/gst/base/gstadapter.c:
Added more docs.
* libs/gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_do_sync), (gst_base_sink_chain):
Added some comments.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_do_sync):
Some cleanups.
When the sink finishes blocking on the preroll buffer, it can
immediatly render it instead of rendering when the next buffer
arrives.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_set_property),
(gst_base_sink_get_property), (gst_base_sink_do_sync),
(gst_base_sink_chain):
Small cleanups.
GST_ELEMENT_CLOCK and sync are protected with LOCK.
Don't store _last_stop if the buffer is dropped.
Original commit message from CVS:
* libs/gst/base/gstbasesink.c: (gst_base_sink_get_position):
Take current playback rate into account when reporting
the position.
Original commit message from CVS:
* gst/gstbuffer.c:
Small docs update.
* gst/gstcaps.c: (gst_caps_is_equal):
Don't assert on NULL <--> X. Fixes#323260
* gst/gstminiobject.c: (gst_mini_object_replace):
If we're doing atomic operations, we might just as well use
the proper way to get an atomic pointer.
* libs/gst/base/gstbasesink.c: (gst_base_sink_get_position):
Clean up debugging.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_event), (gst_base_sink_do_sync),
(gst_base_sink_activate_pull), (gst_base_sink_change_state):
Properly handle non GST_FORMAT_TIME segment
* gst/elements/gstidentity.c: (gst_identity_transform_ip):
Properly handle non GST_FORMAT_TIME segment
* gst/gstsegment.c:
This function is valid if the accumulator is 0 and the format
is different from the requested format.
Original commit message from CVS:
2005-11-24 Michael Smith <msmith@fluendo.com>
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
Unlock the PREROLL_LOCK in a failure case.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_class_init),
(gst_base_sink_wait), (gst_base_sink_do_sync),
(gst_base_sink_handle_event):
* gst/base/gstbasesink.h:
No need to store the clock, the parent element class already
has it.
* gst/gstbin.c: (gst_bin_set_clock_func), (gst_bin_add_func):
Updates for clock_set returning a gboolean
* gst/gstclock.c: (gst_clock_entry_new), (gst_clock_id_wait),
(gst_clock_id_wait_async), (gst_clock_class_init),
(gst_clock_init), (gst_clock_finalize),
(gst_clock_get_internal_time), (gst_clock_get_time),
(gst_clock_slave_callback), (gst_clock_set_master),
(gst_clock_get_master), (do_linear_regression),
(gst_clock_add_observation), (gst_clock_set_property),
(gst_clock_get_property):
* gst/gstclock.h:
Implement master/slave. When setting a clock as a slave, a
periodic timeout is scheduled to sample master and slave times.
Then the slave clock is recalibrated to match offset and rate
of the master clock.
Update logging a bit.
Add flag so that a clock can state that is cannot be slaved to
another clock.
* gst/gstelement.c: (gst_element_set_clock):
* gst/gstelement.h:
The set_clock returns a gboolean for when an element cannot
deal with the selected clock in the pipeline.
* gst/gstpipeline.c: (gst_pipeline_change_state),
(gst_pipeline_set_clock):
* gst/gstpipeline.h:
Handle the case where the selected clock cannot be set on
the pipeline.
* gst/net/gstnetclientclock.c: (gst_net_client_clock_class_init),
(gst_net_client_clock_init), (gst_net_client_clock_finalize),
(gst_net_client_clock_set_property),
(gst_net_client_clock_get_property),
(gst_net_client_clock_observe_times):
* gst/net/gstnetclientclock.h:
Use regression code in GstClock parent, remove duplicated
functionality.
Original commit message from CVS:
2005-11-22 Andy Wingo <wingo@pobox.com>
* gst/gstevent.h (gst_event_new_new_segment)
(gst_event_parse_new_segment, gst_event_new_buffer_size)
(gst_event_parse_buffer_size, gst_ghost_pad_new_no_target):
Renamed from *_newsegment, *_buffersize, *_notarget.
* scripts/update-funcnames: New script, performs the changes
listed above.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
Make sure the GstFlowReturn is returned.
* gst/gstbus.c: (gst_bus_add_signal_watch_full),
(gst_bus_add_signal_watch):
* gst/gstbus.h:
add gst_bus_add_signal_watch_full.
* gst/gstplugin.c: (gst_plugin_load_file):
Small style cleanup.
Original commit message from CVS:
2005-11-21 Andy Wingo <wingo@pobox.com>
* check/gst/gstevent.c (create_custom_events): Check that
FLUSH_STOP is serialized.
* check/elements/identity.c (event_func):
* check/elements/fakesrc.c (event_func): No stream lock, the core
takes it.
* gst/base/gstbasetransform.c (gst_base_transform_event): No more
stream lock taking, yay.
* gst/gstevent.h (GST_EVENT_FLUSH_STOP): Marked as serialized to
ensure that core takes the stream lock.
* gst/base/gstbasesrc.c (gst_base_src_do_seek): Update for stream
lock name change.
* gst/base/gstbasesink.c (gst_base_sink_event): No need to take
the stream lock for EOS, NEWSEGMENT, or FLUSH_STOP, the core does
it already. For the flush start we do take it though so we get the
right preroll state change messages.
* gst/gstqueue.c (gst_queue_sink_activate_push): No need to take
the stream lock here, the core does it for us.
* gst/gstpad.h (GST_PAD_GET_STREAM_LOCK): Renamed from
GST_STREAM_GET_LOCK.
(GST_PAD_STREAM_LOCK, GST_PAD_STREAM_TRYLOCK)
(GST_PAD_STREAM_UNLOCK, GST_PAD_STREAM_UNLOCK_FULL)
(GST_PAD_STREAM_LOCK_FULL): Renamed from GST_STREAM_*.
(GST_PAD_GET_PREROLL_LOCK): Renamed from GST_PREROLL_GET_LOCK.
(GST_PAD_PREROLL_LOCK, GST_PAD_PREROLL_TRYLOCK)
(GST_PAD_PREROLL_UNLOCK): Renamed from GST_PREROLL_*.
* gst/gstpad.c: Update for stream lock name change.
* gst/base/gstbasesink.c: Update for preroll lock name change.
Original commit message from CVS:
2005-11-21 Andy Wingo <wingo@pobox.com>
* *.h:
* *.c: Ran scripts/update-macros. Oh yes.
* gst/gstobject.h (GST_OBJECT_GET_LOCK, GST_OBJECT_LOCK)
(GST_OBJECT_TRYLOCK, GST_OBJECT_UNLOCK): Renamed from
GST_GET_LOCK, etc.
* scripts/update-macros: New script. Run it on your files to
change GST_LOCK to GST_OBJECT_LOCK, and the same for UNLOCK as
well.
Original commit message from CVS:
* check/gst/gstvalue.c: (GST_START_TEST), (gst_value_suite):
Add a deserialisation test for fractions
* examples/metadata/read-metadata.c: (message_loop),
(make_pipeline), (main):
Fix up metadata reading sample.
* gst/base/gstbasesink.c: (gst_base_sink_do_sync):
Debug format fix
* gst/base/gstbasesrc.c: (gst_base_src_default_negotiate):
Don't try and fixate empty caps
* gst/gst_private.h:
Wrap in G_BEGIN_DECLS/G_END_DECLS
* gst/gstvalue.c: (gst_value_collect_fraction),
(gst_value_set_fraction), (gst_value_get_fraction_denominator),
(gst_value_transform_string_fraction),
(gst_value_compare_fraction):
Add some extra guards to ensure that we don't end up
with an invalid denominator of 0 in a gstfraction and
that fractions always get reduced.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_get_position):
For the current position in stream time, we need to subtract
accumulated time.
* gst/gstsystemclock.c: (gst_system_clock_async_thread):
Release lock before calling the callback function of async
entries.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
0 segment values are 0 in any format.
* gst/base/gstbasetransform.c: (gst_base_transform_event):
* gst/base/gstbasetransform.h:
Parse newsegment correctly in basetransform
* gst/elements/gstidentity.c: (gst_identity_transform_ip):
Sync to clock using updated segment values.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_do_sync):
Don't sync on buffers that fall partially outside our current
segment. Prevents an assertion failure/abort playing some files.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_do_sync):
* gst/base/gstbasesrc.c: (gst_base_src_wait),
(gst_base_src_do_sync), (gst_base_src_get_range):
Implement clock sync in base class.
Original commit message from CVS:
2005-11-09 Andy Wingo <wingo@pobox.com>
* gst/base/gstbasesink.c: Add the beginning of docs here -- have
to work on something else now tho...
Original commit message from CVS:
* check/states/sinks.c: (GST_START_TEST):
Uncomment fixed check.
* docs/design/part-TODO.txt:
Updated TODO.
* gst/base/gstbasesink.c: (gst_base_sink_commit_state),
(gst_base_sink_handle_object), (gst_base_sink_do_sync),
(gst_base_sink_get_position):
If we are going to PLAYING, post the right pending state
when we post the intermediate paused message.
* gst/gstelement.c: (gst_element_continue_state),
(gst_element_set_state_func), (gst_element_change_state):
Don't post state changes that were between the same state
and were not ASYNC.
Original commit message from CVS:
* check/states/sinks.c: (GST_START_TEST), (gst_object_suite):
Added some more checks. Specifically the case where NO_PREROLL
elements are in the pipeline.
* gst/base/gstbasesink.c: (gst_base_sink_commit_state),
(gst_base_sink_handle_object), (gst_base_sink_do_sync),
(gst_base_sink_get_position):
Post READY->PAUSED state change messages too.
Fix bug where VOID was posted as pending state...
* gst/gstbin.c: (gst_bin_recalc_state):
use _element_continue_state() to continue the state change.
* gst/gstelement.c: (gst_element_continue_state),
(gst_element_commit_state), (gst_element_set_state_func),
(gst_element_change_state), (gst_element_change_state_func):
Lots of state change cleanups, assign the STATE_RETURN in
a new continue_state() function that also propagates the
last return value from a state change to the app.
Update some debug statements with proper category.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_do_sync), (gst_base_sink_get_position):
Some more debugging.
* gst/base/gstbasetransform.c: (gst_base_transform_finalize),
(gst_base_transform_init), (gst_base_transform_buffer_alloc),
(gst_base_transform_event), (gst_base_transform_getrange),
(gst_base_transform_chain):
* gst/base/gstbasetransform.h:
Fix debugging,
Protect transform and concurrent buffer alloc with a new lock.
Try not to break ABI/API.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_get_position):
Don't use invalid stream_time.
* gst/gstevent.c: (gst_event_new_newsegment):
stream_time in newsegment cannot be undefined.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_commit_state),
(gst_base_sink_get_position), (gst_base_sink_query),
(gst_base_sink_change_state):
Simply set the right flag when going to playing, that's all
we need to do instead of calling a function inside the object
lock (that could take the lock as well and deadlock)
Original commit message from CVS:
* docs/design/part-TODO.txt:
Update TODO
* gst/base/gstbasesink.c: (gst_base_sink_get_position),
(gst_base_sink_query):
Don't use clock time to report position when in EOS.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_get_position),
(gst_base_sink_query):
Speed up current position calculation.
* gst/base/gstbasesrc.c: (gst_base_src_query),
(gst_base_src_default_newsegment):
Correctly set stream position in newsegment.
* gst/gstbin.c: (gst_bin_add_func), (add_to_queue),
(update_degree), (gst_bin_sort_iterator_next),
(gst_bin_sort_iterator_resync), (gst_bin_sort_iterator_free):
* gst/gstmessage.c: (gst_message_new_custom):
Clean up debugging info
* gst/gstqueue.c: (gst_queue_link_src), (gst_queue_chain),
(gst_queue_loop), (gst_queue_handle_src_query):
Pause task faster.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_commit_state),
(gst_base_sink_handle_object), (gst_base_sink_query), (do_playing):
* gst/base/gstbasesrc.c: (gst_base_src_query):
* gst/elements/gstfilesink.c: (gst_file_sink_query):
* gst/elements/gsttypefindelement.c:
(gst_type_find_handle_src_query), (find_element_get_length),
(gst_type_find_element_activate):
API change fix.
* gst/gstquery.c: (gst_query_new_position),
(gst_query_set_position), (gst_query_parse_position),
(gst_query_new_duration), (gst_query_set_duration),
(gst_query_parse_duration), (gst_query_set_segment),
(gst_query_parse_segment):
* gst/gstquery.h:
Bundling query position/duration is not a good idea since duration
does not change much and we don't want to recalculate it for every
position query, so they are separated again..
Base value in segment query is not needed.
* gst/gstqueue.c: (gst_queue_handle_src_query):
* gst/gstutils.c: (gst_element_query_position),
(gst_element_query_duration), (gst_pad_query_position),
(gst_pad_query_duration):
* gst/gstutils.h:
Updates for query API change.
Added some docs here and there.
Original commit message from CVS:
* check/Makefile.am:
* check/pipelines/stress.c: (GST_START_TEST),
(simple_launch_lines_suite), (main):
Small state change torture test.
* docs/design/part-states.txt:
* gst/base/gstbasesink.c: (gst_base_sink_commit_state),
(gst_base_sink_handle_object), (gst_base_sink_event), (do_playing),
(gst_base_sink_change_state):
Never take state lock from streaming thread, clean up ugly
hacks. Unfortunatly core does not yet support nice ways to
async commit state.
* gst/gstbin.c: (gst_bin_remove_func), (gst_bin_recalc_state),
(bin_bus_handler):
Start state recalc if a STATE_DIRTY message is posted, but only
on the toplevel bin.
* gst/gstelement.c: (gst_element_sync_state_with_parent),
(gst_element_get_state_func), (gst_element_abort_state),
(gst_element_commit_state), (gst_element_lost_state),
(gst_element_set_state_func), (gst_element_change_state):
* gst/gstelement.h:
State variables are now protected with the LOCK, the state
lock is only used to serialize _set_state().
Original commit message from CVS:
2005-10-13 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
* gst/base/gstbasesrc.c: (gst_base_src_get_range):
fix up debugging
* tools/gst-launch.c: (event_loop):
print out clock nicely
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
* gst/base/gstbasesrc.c: (gst_base_src_query):
fix more guint64<->gdouble conversions
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_buffer):
* gst/elements/gstfilesink.c: (gst_file_sink_event),
(gst_file_sink_render):
Some more debugging info.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_change_state):
No need to prerol after receiving EOS.
* gst/elements/gstfakesink.c: (gst_fake_sink_event):
* gst/elements/gstfakesrc.c: (gst_fake_src_event_handler):
* gst/elements/gstidentity.c: (gst_identity_event):
Print events more verbosely.
Original commit message from CVS:
* check/gst/gstevent.c: (GST_START_TEST):
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_change_state):
* gst/base/gstbasesrc.c: (gst_base_src_default_newsegment):
* gst/base/gstbasetransform.c: (gst_base_transform_event):
* gst/elements/gstfilesink.c: (gst_file_sink_event):
* gst/gstevent.c: (gst_event_new_newsegment),
(gst_event_parse_newsegment):
* gst/gstevent.h:
Added extra flag to newsegment for future API freeze.
Updated check and base elements.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_do_sync), (gst_base_sink_handle_buffer):
Prepare for doing QOS.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_preroll_queue_flush),
(gst_base_sink_handle_object), (gst_base_sink_event),
(gst_base_sink_wait), (gst_base_sink_handle_event),
(gst_base_sink_change_state):
* gst/base/gstbasesink.h:
Repost EOS message while going to PLAYING if still EOS.
Make sure that when receiving a FLUSH_START we don't attempt
to sync on the clock anymore.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_change_state):
Only error is an error.
* gst/gstbin.c: (gst_bin_change_state):
Better debugging.
* gst/gstpad.c: (gst_pad_alloc_buffer), (gst_pad_chain):
Also call pad_block in pad alloc.
* gst/gstutils.c: (gst_flow_get_name):
Better debugging.
Original commit message from CVS:
2005-09-26 Andy Wingo <wingo@pobox.com>
* configure.ac:
* tests/Makefile.am:
* tests/memchunk: Remove memchunk benchmark stuff, this is taken
over by GLib bug 118439.
* gst/base/gstbasesink.c (gst_base_sink_wait): Factor out the wait
routines to a function.
* docs/libs/gstreamer-libs-sections.txt: I am a good person today.
* libs/gst/controller/gsthelper.c:
* libs/gst/controller/gstcontroller.h (gst_controller_sync_values)
(gst_object_sync_values): Renamed from sink_values. Ugh.
* libs/gst/controller/gsthelper.c: Update for __gst_controller_key.
* libs/gst/controller/gstcontroller.c (__gst_controller_key):
Renamed from controller_key, as it is exported.
* gst/gstvalue.c (_gst_value_initialize): Fake out the compiler.
Original commit message from CVS:
* docs/README:
* gst/gstpad.c: (gst_pad_class_init), (gst_pad_chain):
* gst/gstpluginfeature.c:
* gst/gstutils.c:
various doc updates
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
change an assert into an error until it gets fixed properly
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_class_init),
(gst_base_sink_send_event), (gst_base_sink_peer_query),
(gst_base_sink_query):
Prepare for more accurate position reporting and query
handling.
* gst/gstelement.c: (gst_element_send_event),
(gst_element_set_state):
Add some comment.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_class_init),
(gst_base_sink_init):
Make sync property settable from subclass.
* gst/elements/gstfakesink.c: (gst_fake_sink_init),
(gst_fake_sink_change_state):
Set sync to FALSE by default.
Original commit message from CVS:
2005-09-07 Andy Wingo <wingo@pobox.com>
* gst/base/gstbasesink.c (gst_base_sink_activate_pull): Fix a race
condition whereby the pad's task function is entered before the
pad_mode variable was set.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_pad_buffer_alloc):
Add comment.
* gst/elements/gstfakesink.c: (gst_fake_sink_init),
(gst_fake_sink_change_state):
Make state change function thread-safe.
* gst/gstpad.c: (gst_pad_alloc_buffer):
Set offset on generic buffer allocated by fallback.
Original commit message from CVS:
2005-09-02 Andy Wingo <wingo@pobox.com>
* gst/gstelement.h (GstState): Renamed from GstElementState,
changed to be a normal enum instead of flags.
(GstStateChangeReturn): Renamed from GstElementStateReturn, names
munged to be GST_STATE_CHANGE_*.
(GST_STATE_CHANGE): Renamed from GST_STATE_TRANSITION, updated to
work with the new state representation.
(GstStateChange): New enumeration of possible state transitions.
Replaces GST_STATE_FOO_TO_BAR with GST_STATE_CHANGE_FOO_TO_BAR.
(GstElementClass::change_state): Pass the GstStateChange along as
an argument. Helps language bindings, so they don't have to use
tricky lock-needing macros like GST_STATE_CHANGE ().
* scripts/update-states (file): New script. Run it on a file to
update it for state naming and API changes. Updates files in
place.
* All files updated for the new API.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_event), (gst_base_sink_do_sync),
(gst_base_sink_handle_event):
* gst/base/gstbasesink.h:
Handle newsegments more correctly.
* gst/gstbus.c:
Fix docs.
* gst/gstevent.c: (gst_event_new_newsegment):
A newsegment cannot have a start_time of -1
Original commit message from CVS:
* gst/base/gstadapter.c: (gst_adapter_flush):
Flushing out 0 bytes is ok for this function.
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
no newsegment gives a warning and sets the start/stop to
invalid.
* gst/base/gstbasetransform.c: (gst_base_transform_change_state),
(gst_base_transform_set_passthrough):
Some debug info.
* gst/gstminiobject.c: (gst_mini_object_ref):
Check refcount here too.
* gst/gstpad.c: (gst_pad_init):
Pads are initially flushing and refusing data.
* gst/gstutils.c: (gst_element_link_pads_filtered):
When adding a capsfilter element make sure it has the
same state as the parent bin.
Original commit message from CVS:
2005-08-26 Andy Wingo <wingo@pobox.com>
* check/pipelines/simple_launch_lines.c (run_pipeline): Check
element_set_state's return val.
(test_2_elements): Add test that's been disabled for months.
* gst/elements/gstfakesink.c: Cleanups. Add can-activate-push and
can-activate-pull properties.
* gst/elements/gstfakesrc.c: Cleanups. Add can-activate-push and
can-activate-pull properties. Implement is_seekable so fakesrc can
operate in pull mode.
* gst/base/gstbasesink.c (GstBaseSink): Remove has-loop, has-chain
properties.
(gst_base_sink_activate, gst_base_sink_activate_pull)
(gst_base_sink_activate_push): Make activation mode choosing work.
Cleanups.
(gst_base_sink_chain, gst_base_sink_loop): Assert activation mode
is right. Make pull mode work. Post an eos before pausing in pull
mode.
(gst_base_sink_change_state): Pay attention to the core's
change_state() return val.
* gst/base/gstbasesrc.c (GstBaseSrc): Remove has-loop,
has-getrange properties. Cleanups.
* gst/base/gstbasesrc.h (GstBaseSrc): Remove has_loop,
has_getrange and replace with can_activate_pull and
can_activate_push.
* gst/base/gstbasesink.h (GstBaseSink): Rearrange fields, add
locking comments. Remove has_loop, has_chain and replace with
can_activate_pull and can_activate_push.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
* gst/base/gstbasetransform.c: (gst_base_transform_transform_size),
fix up some debugging
(gst_base_transform_get_unit_size),
(gst_base_transform_buffer_alloc), (gst_base_transform_event),
(gst_base_transform_handle_buffer):
* gst/base/gstbasetransform.h:
handle and store timed NEWSEGMENT events so that subclasses that
calculate time by counting samples have a segment_start time they
need to add to their timestamps - see audioresample
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_get_times), (gst_base_sink_do_sync),
(gst_base_sink_handle_buffer), (gst_base_sink_change_state):
* gst/base/gstbasesink.h:
Handle newsegment events correctly.
Drop buffers out of the segment range.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
Remove extra parameter to debug output
* gst/base/gstbasesrc.c: (gst_base_src_send_discont),
(gst_base_src_do_seek), (gst_base_src_activate_push):
Fix seek event handling.
* gst/gstpipeline.c: (gst_pipeline_change_state):
* gst/gstqueue.c: (gst_queue_handle_sink_event),
(gst_queue_src_activate_push):
Don't start the src pad task on FLUSH_STOP if the pad
isn't linked.
Debug changes.
Original commit message from CVS:
* check/Makefile.am:
clean up environment for when registry gets built versus
when actual tests are run; valgrind seems to not report
leaks if GST_PLUGIN_PATH is set to some specific values
* check/gst/gstbin.c: (GST_START_TEST):
add more refcounting checks; maybe this exposes a
preroll lock bug ?
* common/check.mak:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
* gst/check/gstcheck.h:
* gst/gstbin.c: (bin_element_is_semi_sink), (gst_bin_get_state),
(gst_bin_change_state):
* gst/gstpad.c: (gst_pad_activate_push), (gst_pad_chain):
add/fix debugging/whitespace
Original commit message from CVS:
2005-08-18 Andy Wingo <wingo@pobox.com>
Make sure that when a pipeline goes to PLAYING, that data has
actually hit the sink.
* check/states/sinks.c (test_sink): A sink that doesn't get any
data shouldn't return SUCCESS for going to either PLAYING or
PAUSED. Test also the return values on the way back down.
* gst/gstelement.c (gst_element_set_state): When changing the
state of an element currently changing state asynchronously, go to
lost-state after commiting the pending state. Makes future calls
to get_state continue to return ASYNC.
* gst/base/gstbasesink.c (gst_base_sink_change_state): Return
ASYNC when going to PLAYING if we still don't have preroll, as can
happen with live sources.
Original commit message from CVS:
* check/Makefile.am:
* check/gst/gstevents.c: (GST_START_TEST), (event_probe),
(test_event), (timediff), (gstevents_suite), (main):
I wrote a test!
* docs/design/part-seeking.txt:
Spelling correction
* docs/gst/tmpl/gstevent.sgml:
Docs updates.
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
Treat a buffer-without-newsegment the same as a receiving
a newsegment not in time format, and disable syncing to the clock
with a warning.
* gst/gstbus.c: (gst_bus_set_sync_handler):
Assert if anyone tries to replace the existing sync_handler for bus,
as only the owner should be setting it.
* gst/gstevent.h:
Have a fixed set of custom event enums with events identified by
their structure name (as in 0.8), rather than a free-for-all
allowing collisions between enum values from different plugins.
* gst/gstpad.c: (gst_pad_class_init):
Docs change.
* gst/gstqueue.c: (gst_queue_handle_sink_event):
Handle out-of-band downstream events from the sending thread.
Original commit message from CVS:
* docs/design/part-seeking.txt:
Some small additions.
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_get_times), (gst_base_sink_do_sync),
(gst_base_sink_activate_push), (gst_base_sink_activate_pull):
* gst/base/gstbasesink.h:
discont values are gint64, handle the math correctly.
* gst/base/gstbasesrc.c: (gst_base_src_loop):
Make the basesrc report error if the source pad is not linked.
* gst/gstqueue.c: (gst_queue_link_src), (gst_queue_chain),
(gst_queue_loop), (gst_queue_handle_src_query),
(gst_queue_src_activate_push):
Make queue collect data even if the srcpad is not linked.
Start pushing out data as soon as it is linked.
* gst/gstutils.c: (gst_element_unlink), (gst_flow_get_name):
* gst/gstutils.h:
Added gst_flow_get_name() to ease error reporting.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_event), (gst_base_sink_get_times),
(gst_base_sink_do_sync), (gst_base_sink_change_state):
* gst/base/gstbasesink.h:
Store and use discont values when syncing buffers as described
in design docs.
* gst/base/gstbasesrc.c: (gst_base_src_send_discont),
(gst_base_src_do_seek), (gst_base_src_loop), (gst_base_src_start),
(gst_base_src_activate_push):
Push discont event when starting.
* gst/elements/gstidentity.c: (gst_identity_transform):
Small cleanups.
* gst/gstbin.c: (gst_bin_change_state):
Small cleanups in base_time distribution.
* gst/gstelement.c: (gst_element_set_base_time),
(gst_element_get_base_time), (gst_element_change_state):
* gst/gstelement.h:
Added methods for the base_time of the element.
Some MT fixes.
* gst/gstpipeline.c: (gst_pipeline_send_event),
(gst_pipeline_change_state), (gst_pipeline_set_new_stream_time),
(gst_pipeline_get_last_stream_time):
* gst/gstpipeline.h:
MT fixes.
Handle seeking as described in design doc, remove stream_time
hack.
Cleanups clock and stream_time selection code. Added accessors
for the stream_time.
Original commit message from CVS:
* examples/Makefile.am:
* examples/helloworld/helloworld.c: (event_loop), (main):
* examples/queue/queue.c: (event_loop), (main):
* examples/queue2/queue2.c: (main):
Update a couple of the examples to work again.
* gst/base/gstbasesink.c: (gst_base_sink_preroll_queue_empty),
(gst_base_sink_preroll_queue_flush), (gst_base_sink_handle_event):
Spelling corrections and extra debug.
* gst/gstbin.c: (gst_bin_class_init), (gst_bin_init), (is_eos),
(gst_bin_add_func), (bin_element_is_sink), (gst_bin_get_state),
(gst_bin_change_state), (gst_bin_dispose), (bin_bus_handler):
* gst/gstbin.h:
* gst/gstpipeline.c: (gst_pipeline_init), (gst_pipeline_dispose),
(gst_pipeline_change_state):
* gst/gstpipeline.h:
Move the bus handler for children to the GstBin, and create a
separate bus for receiving messages from children to the one the
bus sends 'upwards' on.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_preroll_queue_empty),
(gst_base_sink_preroll_queue_flush), (gst_base_sink_handle_object),
(gst_base_sink_change_state):
* gst/base/gstbasesink.h:
Some tweaks, only EOS and a buffer complete a preroll.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_change_state):
Small debug line.
* gst/gstclock.h:
map SIGNAL and BROADCAST to the right function.
* gst/gstobject.h:
Remove redundant braces.
* gst/gstpad.c: (gst_pad_set_caps):
Don't call setcaps function when reseting caps to NULL.
* gst/gstsystemclock.c: (gst_system_clock_dispose),
(gst_system_clock_async_thread), (gst_system_clock_id_wait_async),
(gst_system_clock_id_unschedule):
Use BROADCAST as this is what we do.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_base_sink_handle_object):
We are actually prerolling before commiting the state
change.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_preroll_queue_flush),
(gst_basesink_event), (gst_basesink_deactivate):
Flushing the preroll queue always needs to unlock the waiters.
Original commit message from CVS:
2005-06-27 Andy Wingo <wingo@pobox.com>
* gst/base/gsttypefindhelper.c (gst_type_find_helper): Unref any
remaining buffer.
* gst/gsttrace.c (gst_alloc_trace_list_sorted): New helper,
returns a sorted copy of the trace list.
(gst_alloc_trace_print_live): New API, only prints traces with
live objects. Sort the list.
(gst_alloc_trace_print_all): Sort the list.
(gst_alloc_trace_print): Align columns.
* gst/elements/gstttypefindelement.c:
* gst/elements/gsttee.c:
* gst/base/gstbasesrc.c:
* gst/base/gstbasesink.c:
* gst/base/gstbasetransform.c:
* gst/gstqueue.c: Adapt for pad activation changes.
* gst/gstpipeline.c (gst_pipeline_init): Unref after parenting
sched.
(gst_pipeline_dispose): Drop ref on sched.
* gst/gstpad.c (gst_pad_init): Set the default activate func.
(gst_pad_activate_default): Push mode by default.
(pre_activate_switch, post_activate_switch): New stubs, things to
do before and after switching activation modes on pads.
(gst_pad_set_active): Take a boolean and not a mode, dispatch to
the pad's activate function to choose which mode to activate.
Shortcut on deactivation and call the right function directly.
(gst_pad_activate_pull): New API, (de)activates a pad in pull
mode.
(gst_pad_activate_push): New API, same for push mode.
(gst_pad_set_activate_function)
(gst_pad_set_activatepull_function)
(gst_pad_set_activatepush_function): Setters for new API.
* gst/gstminiobject.c (gst_mini_object_new, gst_mini_object_free):
Trace all miniobjects.
(gst_mini_object_make_writable): Unref the arg if we copy, like
gst_caps_make_writable.
* gst/gstmessage.c (_gst_message_initialize): No trace init.
* gst/gstghostpad.c (gst_proxy_pad_do_activate)
(gst_proxy_pad_do_activatepull, gst_proxy_pad_do_activatepush):
Adapt for new pad API.
* gst/gstevent.c (_gst_event_initialize): Don't initialize trace.
* gst/gstelement.h:
* gst/gstelement.c (gst_element_iterate_src_pads)
(gst_element_iterate_sink_pads): New API functions.
* gst/gstelement.c (iterator_fold_with_resync): New utility,
should fold into gstiterator.c in some form.
(gst_element_pads_activate): Simplified via use of fold and
delegation of decisions to gstpad->activate.
* gst/gstbus.c (gst_bus_source_finalize): Set the bus to NULL,
help in debugging.
* gst/gstbuffer.c (_gst_buffer_initialize): Ref the buffer type
class once in init, like gstmessage. Didn't run into this issue
but it seems correct. Don't initialize a trace, gstminiobject does
that.
* check/pipelines/simple_launch_lines.c (test_stop_from_app): New
test, runs fakesrc ! fakesink, stopping on ::handoff via a message
to the bus.
(assert_live_count): New util function, uses alloc traces to check
cleanup.
* check/gst/gstghostpad.c (test_ghost_pads): More refcount checks.
To be modified when unlink drops the internal pad.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_preroll_queue_empty),
(gst_basesink_handle_object), (gst_basesink_event),
(gst_basesink_do_sync), (gst_basesink_handle_event),
(gst_basesink_change_state):
* gst/gsttask.h:
Right, two problems here: ghostpads don't take locks and
glib _rec_mutex_lock_full() with depth==0 still locks.
Catch illegal locking and g_warn them.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_set_property),
(gst_basesink_preroll_queue_empty),
(gst_basesink_preroll_queue_flush), (gst_basesink_handle_object),
(gst_basesink_event), (gst_basesink_do_sync),
(gst_basesink_handle_event), (gst_basesink_handle_buffer),
(gst_basesink_chain), (gst_basesink_loop), (gst_basesink_activate),
(gst_basesink_change_state):
Reworked the base sink, handle event and buffer serialisation
correctly and removed possible deadlock.
Handle EOS correctly.
Original commit message from CVS:
2005-06-17 Andy Wingo <wingo@pobox.com>
* gst/base/gstbasesink.c (gst_basesink_chain): Remove bogus
assert; it's always possible that the pad gets deactivated in
between the checks in gstpad.c and the implementation. Rely on
finish_preroll() to return a FLUSHING or similar instead of on the
assert.
Original commit message from CVS:
2005-06-17 Andy Wingo <wingo@pobox.com>
* gst/base/gstbasesink.c (gst_basesink_event): Only wait for the
clock and post an EOS message if we come out of finish_preroll in
the playing state.
Original commit message from CVS:
2005-06-08 Andy Wingo <wingo@pobox.com>
* gst/gstutils.c: RPAD fixes all around.
(gst_element_link_pads): Refcounting fixes.
* tools/gst-inspect.c:
* tools/gst-xmlinspect.c:
* parse/grammar.y:
* gst/base/gsttypefindhelper.c:
* gst/base/gstbasesink.c:
* gst/gstqueue.c: RPAD fixes.
* gst/gstghostpad.h:
* gst/gstghostpad.c: New ghost pad implementation as full proxy
pads. The tricky thing is they provide both source and sink
interfaces, since they proxy the internal pad for the external
pad, and vice versa. Implement with lower-level ProxyPad objects,
with the interior proxy pad as a child of the exterior ghost pad.
Should write a doc on this.
* gst/gstpad.h: s/RPAD/PAD/, s/RealPad/Pad/.
(gst_pad_set_name, gst_pad_set_parent): Macros removed, use
gst_object API.
* gst/gstpad.c: Big changes. No more stub base GstPad, now all
pads are real pads. No ghost pads in this file. Not documenting
the myriad s/RPAD/PAD/ and REALIZE fixes.
(gst_pad_class_init): Add properties for "direction" and
"template". Both are construct-only, so they can't change during
the life of the pad. Fixes properly deriving from GstPad.
(gst_pad_custom_new, gst_pad_custom_new_from_template): Gone. For
derived objects, just set properties when creating the objects via
g_object_new.
(gst_pad_get_parent): Implement as a function, return NULL if the
parent is not an element.
(gst_pad_get_real_parent, gst_pad_add_ghost_pad)
(gst_pad_remove_ghost_pad, gst_pad_realize): Removed.
* gst/gstobject.c (gst_object_class_init): Make name a construct
property. Don't set it in the object init.
* gst/gstelement.c (gst_element_add_pad): Don't allow adding pads
with UNKNOWN direction.
(gst_element_add_ghost_pad): Remove non-orthogonal API. Replace
with gst_element_add_pad (e, gst_ghost_pad_new (name, pad)).
(gst_element_remove_pad): Remove ghost-pad special cases.
(gst_element_pads_activate): Remove rpad cruft.
* gst/gstbin.c (gst_bin_change_state): Use gst_pad_get_parent to
catch the pad's-parent-not-an-element case.
* gst/gst.h: Include gstghostpad.h.
* gst/gst.c (init_post): No more real, ghost pads.
* gst/Makefile.am: Add gstghostpad.[ch].
* check/Makefile.am:
* check/gst/gstbin.c:
* check/gst/gstghostpad.c (test_ghost_pads): Check that linking
into a bin creates ghost pads, and that the refcounts are right.
Partly moved from gstbin.c.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_finish_preroll),
(gst_basesink_chain_unlocked), (gst_basesink_activate):
* gst/gstminiobject.c: (gst_mini_object_get_type),
(gst_mini_object_free):
* gst/gstpad.c: (gst_pad_accept_caps), (gst_pad_query),
(gst_pad_push), (gst_pad_push_event):
* gst/gstqueue.c: (gst_queue_change_state):
Don't queue buffers in basesink when we are flushing.
Unref buffer when flushing in basesink.
Flush queue when going to READY
Unref buffer when _push() returns an error.
Don't free MiniObject instance when refcount is incremented
in _finalize() so that we can recover objects.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_init),
(gst_basesink_activate):
* gst/base/gstbasesrc.c: (gst_basesrc_unlock),
(gst_basesrc_is_seekable):
* gst/gstbin.c: (gst_bin_add_func), (gst_bin_remove_func),
(bin_element_is_sink), (gst_bin_change_state):
* gst/gstelement.c: (gst_element_add_pad), (gst_element_query):
* gst/gstelement.h:
Identify sinks by their flag to avoid overly complicated
checks (fow now).
Do state changes even for elements not reachable from the
sinks.
BaseSink is a sink now :)
Some more debugging info in the basesrc.
Original commit message from CVS:
* gst/base/gstbasesink.c: (gst_basesink_preroll_queue_empty),
(gst_basesink_handle_buffer), (gst_basesink_chain_unlocked),
(gst_basesink_activate):
Actually do something with error codes returned from the push
functions.
Original commit message from CVS:
Added typefind helper.
Small preroll fix in the base sink.
Disable typefind code in basesrc.
Crude port of typefindelement.
Fakesrc cleanups.
Original commit message from CVS:
* gst/base/Makefile.am:
* gst/base/README:
* gst/base/gstbasesink.c: (gst_basesink_get_type),
(gst_basesink_base_init), (gst_basesink_class_init),
(gst_basesink_pad_getcaps), (gst_basesink_init),
(gst_basesink_activate), (gst_basesink_change_state):
* gst/base/gstbasesink.h:
* gst/base/gstbasetransform.c: (gst_base_transform_get_type),
(gst_base_transform_base_init), (gst_base_transform_finalize),
(gst_base_transform_class_init), (gst_base_transform_init),
(gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps),
(gst_base_transform_event), (gst_base_transform_getrange),
(gst_base_transform_chain), (gst_base_transform_handle_buffer),
(gst_base_transform_set_property),
(gst_base_transform_get_property),
(gst_base_transform_sink_activate),
(gst_base_transform_src_activate),
(gst_base_transform_change_state):
* gst/base/gstbasetransform.h:
* gst/elements/gstidentity.c: (gst_identity_finalize),
(gst_identity_class_init), (gst_identity_init),
(gst_identity_event), (gst_identity_check_perfect),
(gst_identity_transform), (gst_identity_set_property),
(gst_identity_get_property), (gst_identity_change_state):
* gst/elements/gstidentity.h:
* gst/gstelement.c: (gst_element_get_state_func),
(gst_element_lost_state), (gst_element_pads_activate):
* gst/gstpad.c: (gst_pad_set_active), (gst_pad_peer_set_active),
(gst_pad_check_pull_range), (gst_pad_pull_range):
* gst/gstpad.h:
Simplify pad activation.
Added function to check if pull_range can be performed.
Error out when pulling inactive or flushing pads.
Removed const from refcounted types as it does not make sense.
Simplify pad templates in basesink
Added base class for simple 1-to-1 transforms.
Make identity subclass the base transform.
Original commit message from CVS:
Added state change code.
Added/updated docs.
Added sink base class, make fakesink extend the base class.
Small cleanups in GstPipeline.
