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caps: add comments about g_ptr_array size behaviour

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Just explain the behaviour to avoid that someone else is wasting time trying to
improve this too.
This commit is contained in:
Stefan Kost 2009-07-21 11:32:01 +03:00
parent 89cefd8b59
commit 24517c8975
1 changed files with 7 additions and 0 deletions
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7
gst/gstcaps.c
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@ -143,6 +143,11 @@ gst_caps_new_empty (void)
caps->refcount = 1;
caps->flags = 0;
caps->structs = g_ptr_array_new ();
/* the 32 has been determined by logging caps sizes in _gst_caps_free
* but g_ptr_array uses 16 anyway if it expands once, so this does not help
* in practise
* caps->structs = g_ptr_array_sized_new (32);
*/
#ifdef DEBUG_REFCOUNT
GST_CAT_LOG (GST_CAT_CAPS, "created caps %p", caps);
@ -295,6 +300,8 @@ _gst_caps_free (GstCaps * caps)
/* The refcount must be 0, but since we're only called by gst_caps_unref,
* don't bother testing. */
len = caps->structs->len;
/* This can be used to get statistics about caps sizes */
/*GST_CAT_INFO (GST_CAT_CAPS, "caps size: %d", len); */
for (i = 0; i < len; i++) {
structure = (GstStructure *) gst_caps_get_structure_unchecked (caps, i);
gst_structure_set_parent_refcount (structure, NULL);