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basetransform: Make gst_base_transform_reconfigure() public

Browse source 
This has the same function as the negotiate() functions in various other
base classes and is required to be able to completely re-implement
submit_input_buffer() in subclasses.
This commit is contained in:
Sebastian Dröge 2020-02-10 12:58:47 +02:00
parent baa5aae24b
commit 6ab1cdf51d
2 changed files with 45 additions and 3 deletions
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45
libs/gst/base/gstbasetransform.c
View file

@ -1402,7 +1402,7 @@ gst_base_transform_default_propose_allocation (GstBaseTransform * trans,
}
static gboolean
gst_base_transform_reconfigure (GstBaseTransform * trans)
gst_base_transform_reconfigure_unlocked (GstBaseTransform * trans)
{
gboolean reconfigure, ret = TRUE;
@ -1436,6 +1436,45 @@ done:
return ret;
}
/**
* gst_base_transform_reconfigure:
* @trans: the #GstBaseTransform to set
*
* Negotiates src pad caps with downstream elements if the source pad is
* marked as needing reconfiguring. Unmarks GST_PAD_FLAG_NEED_RECONFIGURE in
* any case. But marks it again if negotiation fails.
*
* Do not call this in the #GstBaseTransformClass.transform() or
* #GstBaseTransformClass.transform_ip() vmethod. Call this in
* #GstBaseTransformClass.submit_input_buffer(),
* #GstBaseTransformClass.prepare_output_buffer() or in
* #GstBaseTransformClass.generate_output() _before_ any output buffer is
* allocated.
*
* It will be default be called when handling an ALLOCATION query or at the
* very beginning of the default #GstBaseTransformClass.submit_input_buffer()
* implementation.
*
* Returns: %TRUE if the negotiation succeeded, else %FALSE.
*
* Since: 1.18
*/
gboolean
gst_base_transform_reconfigure (GstBaseTransform * trans)
{
gboolean ret;
g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
GST_PAD_STREAM_LOCK (trans->sinkpad);
ret = gst_base_transform_reconfigure_unlocked (trans);
if (!ret)
gst_pad_mark_reconfigure (trans->srcpad);
GST_PAD_STREAM_UNLOCK (trans->sinkpad);
return ret;
}
static gboolean
gst_base_transform_default_query (GstBaseTransform * trans,
GstPadDirection direction, GstQuery * query)
@ -1464,7 +1503,7 @@ gst_base_transform_default_query (GstBaseTransform * trans,
if (direction != GST_PAD_SINK)
goto done;
ret = gst_base_transform_reconfigure (trans);
ret = gst_base_transform_reconfigure_unlocked (trans);
if (G_UNLIKELY (!ret))
goto done;
@ -1984,7 +2023,7 @@ default_submit_input_buffer (GstBaseTransform * trans, gboolean is_discont,
GstClockTime running_time;
GstClockTime timestamp;
if (G_UNLIKELY (!gst_base_transform_reconfigure (trans)))
if (G_UNLIKELY (!gst_base_transform_reconfigure_unlocked (trans)))
goto not_negotiated;
if (GST_BUFFER_OFFSET_IS_VALID (inbuf))

3
libs/gst/base/gstbasetransform.h
View file

@ -350,6 +350,9 @@ GST_BASE_API
gboolean gst_base_transform_update_src_caps (GstBaseTransform *trans,
GstCaps *updated_caps);
GST_BASE_API
gboolean gst_base_transform_reconfigure (GstBaseTransform * trans);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBaseTransform, gst_object_unref)
G_END_DECLS