libs/gst/base/gstbasetransform.c (_GstBaseTransformPrivate): (gst_base_transform_init, gst_base_transform_sink_activa...

Original commit message from CVS:
2007-01-12  Andy Wingo  <wingo@pobox.com>

* libs/gst/base/gstbasetransform.c (_GstBaseTransformPrivate):
(gst_base_transform_init, gst_base_transform_sink_activate_push)
(gst_base_transform_src_activate_pull):
Track the activation mode.
(gst_base_transform_setcaps): In pull mode, when activating the
src pad, after activating the sink pad, activate the sink pad's
peer, as discussed in part-negotiation.txt.

* libs/gst/base/gstbasesrc.h:
* libs/gst/base/gstbasesrc.c (gst_base_src_fixate): Add fixate
vmethod, as in basesink.

* libs/gst/base/gstbasesink.h: Reformat docs, add fixate vmethod.

* libs/gst/base/gstbasesink.c (gst_base_sink_pad_setcaps): In pull
mode, first proxy the setcaps to the peer pad.
(gst_base_sink_pad_fixate): Add a fixate function that calls the
new fixate vmethod.
(gst_base_sink_default_activate_pull): Rename from
gst_base_sink_activate_pull.
(gst_base_sink_negotiate_pull): New function, performs negotiation
in pull mode before calling ::activate_pull().
(gst_base_sink_pad_activate_pull): Actually call the activate_pull
vmethod instead of the default implementation. I have no idea how
this worked before. Negotiate before calling activate_pull.