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basetransform: Always call ::propose_allocation vfunc

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And only forward the allocation query if we're working in
passthrough mode if no ::propose_allocation is implemented.
In place buffer transformations will change the buffer
content and require explicit handling of all metas.
This commit is contained in:
Sebastian Dröge 2012-01-18 12:07:46 +01:00
parent 0d2adf5a18
commit b56bef1418
2 changed files with 9 additions and 10 deletions
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15
libs/gst/base/gstbasetransform.c
View file

@ -1317,19 +1317,18 @@ gst_base_transform_default_query (GstBaseTransform * trans,
goto done;
GST_BASE_TRANSFORM_LOCK (trans);
passthrough = trans->passthrough || trans->always_in_place;
passthrough = trans->passthrough;
GST_BASE_TRANSFORM_UNLOCK (trans);
if (passthrough) {
GST_DEBUG_OBJECT (trans, "propose allocation values");
/* pass the query to the propose_allocation vmethod if any */
if (G_LIKELY (klass->propose_allocation)) {
ret = klass->propose_allocation (trans, query);
} else if (passthrough) {
GST_DEBUG_OBJECT (trans, "doing passthrough query");
ret = gst_pad_peer_query (otherpad, query);
} else {
GST_DEBUG_OBJECT (trans, "propose allocation values");
/* pass the query to the propose_allocation vmethod if any */
if (G_LIKELY (klass->propose_allocation))
ret = klass->propose_allocation (trans, query);
else
ret = FALSE;
ret = FALSE;
}
GST_DEBUG_OBJECT (trans, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret,
query);

4
libs/gst/base/gstbasetransform.h
View file

@ -159,8 +159,8 @@ struct _GstBaseTransform {
* should must chain up to the parent if they didn't handle the
* query
* @propose_allocation: Propose buffer allocation parameters for upstream elements.
* This function is only called when not operating in
* passthrough mode. The default implementation is NULL.
* This function must be implemented if the element reads or
* writes the buffer content. The default implementation is NULL.
* @decide_allocation: Setup the allocation parameters for allocating output
* buffers. The passed in query contains the result of the
* downstream allocation query. This function is only called