• Andy Wingo Wingo's avatar
    gst/gstelement.c (gst_element_dispose): Protect against multiple invocations. · 3f5a8814
    Andy Wingo Wingo authored
    Original commit message from CVS:
    2004-02-24  Andy Wingo  <wingo@pobox.com>
    * gst/gstelement.c (gst_element_dispose): Protect against multiple
    * gst/schedulers/gstoptimalscheduler.c
    I added a mess of prototypes at the top of the file by way of
    documentation. Some of the operations on chains and groups were
    (create_group): Added a type argument so if the group is enabled,
    the setup_group_scheduler knows what to do.
    (group_elements): Added a type argument here, too, to be passed on
    to create_group.
    (group_element_set_enabled): If an unlinked PLAYING element is
    added to a bin, we have to create a new group to hold the element,
    and this function will be called before the group is added to the
    chain. Thus we have a valid case for group->chain==NULL. Instead
    of calling chain_group_set_enabled, just set the flag on the group
    (the chain's status will be set when the group is added to it).
    (gst_opt_scheduler_state_transition, chain_group_set_enabled):
    Setup the group scheduler when the group is enabled, not
    specifically when an element goes PAUSED->PLAYING. This means
    PLAYING elements can be added, linked, and scheduled into a
    PLAYING pipeline, as was intended.
    (add_to_group): Don't ref the group twice. I don't know when this
    double-ref got in here. Removing it has the potential to cause
    segfaults if other parts of the scheduler are buggy. If you find
    that the scheduler is segfaulting for you, put in an extra ref
    here and see if that hacks over the underlying issue. Of course,
    then find out what code is unreffing a group it doesn't own...
    (create_group): Make the extra refcount floating, and remove it
    after adding the element. This means that...
    (unref_group): Destroy when the refcount reaches 0, not 1, like
    every other refcounted object in the known universe.
    (remove_from_group): When a group becomes empty, set it to be not
    active, and remove it from its chain. Don't unref it again,
    there's no floating reference any more.
    (destroy_group): We have to remove the group from the chain in
    remove_from_group (rather than here) to break refcounting cycles
    (the chain always has a ref on the group). So assert that
    (ref_group_by_count): Removed, it was commented out anyway.
    (merge_chains): Use the remove_from_chain and add_to_chain
    primitives to do the reparenting, instead of rolling our own
    (add_to_chain): The first non-disabled group in the chain's group
    list will be the entry point for the chain. Because buffers can
    accumulate in loop elements' peer bufpens, we preferentially
    schedule loop groups before get groups to avoid unnecessary
    execution of get-based groups when the bufpens are already full.
    (gst_opt_scheduler_schedule_run_queue): Debug fixes.
    (get_group_schedule_function): Ditto.
    (loop_group_schedule_function): Ditto.
    (gst_opt_scheduler_loop_wrapper): Ditto.
    (gst_opt_scheduler_iterate): Ditto.
    I understand the opt scheduler now, yippee!
    * gst/gstpad.c: All throughout, added FIXMEs to look at for 0.9.
    (gst_pad_get_name, gst_pad_set_chain_function)
    (gst_pad_set_get_function, gst_pad_set_event_function)
    (gst_pad_set_event_mask_function, gst_pad_get_event_masks)
    (gst_pad_get_event_masks_default, gst_pad_set_convert_function)
    (gst_pad_set_query_function, gst_pad_get_query_types)
    (gst_pad_set_formats_function, gst_pad_set_link_function)
    (gst_pad_set_fixate_function, gst_pad_set_getcaps_function)
    (gst_pad_set_bufferalloc_function, gst_pad_unlink)
    (gst_pad_renegotiate, gst_pad_set_parent, gst_pad_get_parent)
    (gst_pad_add_ghost_pad, gst_pad_proxy_getcaps)
    (gst_pad_proxy_pad_link, gst_pad_proxy_fixate)
    (gst_pad_get_pad_template_caps, gst_pad_check_compatibility)
    (gst_pad_get_peer, gst_pad_get_allowed_caps)
    (gst_pad_alloc_buffer, gst_pad_push, gst_pad_pull)
    (gst_pad_selectv, gst_pad_select, gst_pad_template_get_caps)
    (gst_pad_event_default_dispatch, gst_pad_event_default)
    (gst_pad_dispatcher, gst_pad_send_event, gst_pad_convert_default)
    (gst_pad_convert, gst_pad_query_default, gst_pad_query)
    (gst_pad_get_formats_default, gst_pad_get_formats): Better
    argument checks, and some doc fixes.
    (gst_pad_custom_new_from_template): Um, does anyone
    use these functions? Actually make a custom pad instead of a
    normal one.
    (gst_pad_try_set_caps): Transpose some checks.
    (gst_pad_try_set_caps_nonfixed): Same, and use a macro to check if
    the pad is in negotiation.
    (gst_pad_try_relink_filtered): Use pad_link_prepare.
    * gst/gstelement.c: Remove prototypes also defined in gstclock.h.
    * gst/gstelement.h:
    * gst/gstclock.h: Un-deprecate the old clocking API, as discussed
    on the list.
gstelement.h 19.5 KB