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pad: install query probes

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Fire query probes according to updated design doc.
This commit is contained in:
Wim Taymans 2011-11-08 17:32:11 +01:00
parent 4660beaba8
commit 642a4697fe
3 changed files with 202 additions and 101 deletions
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36
docs/design/part-probes.txt
View file

@ -243,3 +243,39 @@ If there is a valid DATA item, the DATA probes are called for the item.
| O - - - - - - - - - - >
| |
Queries
-------
Query probes have the GST_PAD_PROBE_TYPE_QUERY_* flag set in the callbacks.
pad peerpad
| |
gst_pad_peer_query() | |
-------------------->O |
O |
O-> do BLOCK probes |
O |
O-> do QUERY | PUSH probes |
no peer? O |
FALSE O |
< - - - - - - O |
O gst_pad_query() |
O------------------------------>O
O O-> do BLOCK probes
O O
O O-> do QUERY | PUSH probes
O O
O O---> queryfunc
O error O
<- - - - - - - - - - - - - - - - - - - - - - -O
O O
O O-> do QUERY | PULL probes
O< - - - - - - - - - - - - - - -O
O |
O-> do QUERY | PULL probes |
O |
< - - - - - - O |
| |

263
gst/gstpad.c
View file

@ -1075,8 +1075,8 @@ gst_pad_add_probe (GstPad * pad, GstPadProbeType mask,
/* when no contraints are given for the types, assume all types are
* acceptable */
if ((mask & GST_PAD_PROBE_TYPE_DATA_BOTH) == 0)
mask |= GST_PAD_PROBE_TYPE_DATA_BOTH;
if ((mask & GST_PAD_PROBE_TYPE_ALL_BOTH) == 0)
mask |= GST_PAD_PROBE_TYPE_ALL_BOTH;
if ((mask & GST_PAD_PROBE_TYPE_SCHEDULING) == 0)
mask |= GST_PAD_PROBE_TYPE_SCHEDULING;
@ -3178,104 +3178,6 @@ gst_pad_event_default (GstPad * pad, GstEvent * event)
return result;
}
/**
* gst_pad_query:
* @pad: a #GstPad to invoke the default query on.
* @query: (transfer none): the #GstQuery to perform.
*
* Dispatches a query to a pad. The query should have been allocated by the
* caller via one of the type-specific allocation functions. The element that
* the pad belongs to is responsible for filling the query with an appropriate
* response, which should then be parsed with a type-specific query parsing
* function.
*
* Again, the caller is responsible for both the allocation and deallocation of
* the query structure.
*
* Please also note that some queries might need a running pipeline to work.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query (GstPad * pad, GstQuery * query)
{
gboolean res;
GstPadQueryFunction func;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
GST_DEBUG_OBJECT (pad, "sending query %p (%s)", query,
GST_QUERY_TYPE_NAME (query));
if ((func = GST_PAD_QUERYFUNC (pad)) == NULL)
goto no_func;
res = func (pad, query);
GST_DEBUG_OBJECT (pad, "sent query %p (%s), result %d", query,
GST_QUERY_TYPE_NAME (query), res);
return res;
no_func:
{
GST_DEBUG_OBJECT (pad, "had no query function");
return FALSE;
}
}
/**
* gst_pad_peer_query:
* @pad: a #GstPad to invoke the peer query on.
* @query: (transfer none): the #GstQuery to perform.
*
* Performs gst_pad_query() on the peer of @pad.
*
* The caller is responsible for both the allocation and deallocation of
* the query structure.
*
* Returns: TRUE if the query could be performed. This function returns %FALSE
* if @pad has no peer.
*
* Since: 0.10.15
*/
gboolean
gst_pad_peer_query (GstPad * pad, GstQuery * query)
{
GstPad *peerpad;
gboolean result;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
GST_OBJECT_LOCK (pad);
GST_DEBUG_OBJECT (pad, "peer query %p (%s)", query,
GST_QUERY_TYPE_NAME (query));
peerpad = GST_PAD_PEER (pad);
if (G_UNLIKELY (peerpad == NULL))
goto no_peer;
gst_object_ref (peerpad);
GST_OBJECT_UNLOCK (pad);
result = gst_pad_query (peerpad, query);
gst_object_unref (peerpad);
return result;
/* ERRORS */
no_peer:
{
GST_WARNING_OBJECT (pad, "pad has no peer");
GST_OBJECT_UNLOCK (pad);
return FALSE;
}
}
/**
* gst_pad_query_default:
* @pad: a #GstPad to call the default query handler on.
@ -3343,7 +3245,7 @@ probe_hook_marshal (GHook * hook, ProbeMarshall * data)
type = info->type;
/* one of the data types */
if ((flags & GST_PAD_PROBE_TYPE_DATA_BOTH & type) == 0)
if ((flags & GST_PAD_PROBE_TYPE_ALL_BOTH & type) == 0)
goto no_match;
/* one of the scheduling types */
if ((flags & GST_PAD_PROBE_TYPE_SCHEDULING & type) == 0)
@ -3628,6 +3530,163 @@ done:
}
/**
* gst_pad_query:
* @pad: a #GstPad to invoke the default query on.
* @query: (transfer none): the #GstQuery to perform.
*
* Dispatches a query to a pad. The query should have been allocated by the
* caller via one of the type-specific allocation functions. The element that
* the pad belongs to is responsible for filling the query with an appropriate
* response, which should then be parsed with a type-specific query parsing
* function.
*
* Again, the caller is responsible for both the allocation and deallocation of
* the query structure.
*
* Please also note that some queries might need a running pipeline to work.
*
* Returns: TRUE if the query could be performed.
*/
gboolean
gst_pad_query (GstPad * pad, GstQuery * query)
{
gboolean res;
GstPadQueryFunction func;
GstPadProbeType type;
GstFlowReturn ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
GST_DEBUG_OBJECT (pad, "sending query %p (%s)", query,
GST_QUERY_TYPE_NAME (query));
if (GST_PAD_IS_SRC (pad))
type = GST_PAD_PROBE_TYPE_QUERY_UPSTREAM;
else
type = GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM;
GST_OBJECT_LOCK (pad);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
GST_PAD_PROBE_TYPE_BLOCK, query, probe_stopped);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, query, probe_stopped);
GST_OBJECT_UNLOCK (pad);
if ((func = GST_PAD_QUERYFUNC (pad)) == NULL)
goto no_func;
res = func (pad, query);
GST_DEBUG_OBJECT (pad, "sent query %p (%s), result %d", query,
GST_QUERY_TYPE_NAME (query), res);
if (res != TRUE)
goto query_failed;
GST_OBJECT_LOCK (pad);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PULL, query, probe_stopped);
GST_OBJECT_UNLOCK (pad);
return res;
no_func:
{
GST_DEBUG_OBJECT (pad, "had no query function");
return FALSE;
}
query_failed:
{
GST_DEBUG_OBJECT (pad, "query failed");
return FALSE;
}
probe_stopped:
{
GST_DEBUG_OBJECT (pad, "probe stopped: %s", gst_flow_get_name (ret));
GST_OBJECT_UNLOCK (pad);
return FALSE;
}
}
/**
* gst_pad_peer_query:
* @pad: a #GstPad to invoke the peer query on.
* @query: (transfer none): the #GstQuery to perform.
*
* Performs gst_pad_query() on the peer of @pad.
*
* The caller is responsible for both the allocation and deallocation of
* the query structure.
*
* Returns: TRUE if the query could be performed. This function returns %FALSE
* if @pad has no peer.
*
* Since: 0.10.15
*/
gboolean
gst_pad_peer_query (GstPad * pad, GstQuery * query)
{
GstPad *peerpad;
GstPadProbeType type;
gboolean res;
GstFlowReturn ret;
g_return_val_if_fail (GST_IS_PAD (pad), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
if (GST_PAD_IS_SRC (pad))
type = GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM;
else
type = GST_PAD_PROBE_TYPE_QUERY_UPSTREAM;
GST_DEBUG_OBJECT (pad, "peer query %p (%s)", query,
GST_QUERY_TYPE_NAME (query));
GST_OBJECT_LOCK (pad);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH |
GST_PAD_PROBE_TYPE_BLOCK, query, probe_stopped);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PUSH, query, probe_stopped);
peerpad = GST_PAD_PEER (pad);
if (G_UNLIKELY (peerpad == NULL))
goto no_peer;
gst_object_ref (peerpad);
GST_OBJECT_UNLOCK (pad);
res = gst_pad_query (peerpad, query);
gst_object_unref (peerpad);
if (res != TRUE)
goto query_failed;
GST_OBJECT_LOCK (pad);
PROBE_PUSH (pad, type | GST_PAD_PROBE_TYPE_PULL, query, probe_stopped);
GST_OBJECT_UNLOCK (pad);
return res;
/* ERRORS */
no_peer:
{
GST_WARNING_OBJECT (pad, "pad has no peer");
GST_OBJECT_UNLOCK (pad);
return FALSE;
}
query_failed:
{
GST_DEBUG_OBJECT (pad, "query failed");
return FALSE;
}
probe_stopped:
{
GST_DEBUG_OBJECT (pad, "probe stopped: %s", gst_flow_get_name (ret));
GST_OBJECT_UNLOCK (pad);
return FALSE;
}
}
/**********************************************************************
* Data passing functions
*/
@ -4701,6 +4760,8 @@ update_failed:
}
}
/**
* gst_pad_set_element_private:
* @pad: the #GstPad to set the private data of.

4
gst/gstpad.h
View file

@ -511,6 +511,10 @@ typedef enum
GST_PAD_PROBE_TYPE_DATA_UPSTREAM)
#define GST_PAD_PROBE_TYPE_EVENT_BOTH (GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM | \
GST_PAD_PROBE_TYPE_EVENT_UPSTREAM)
#define GST_PAD_PROBE_TYPE_QUERY_BOTH (GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM | \
GST_PAD_PROBE_TYPE_QUERY_UPSTREAM)
#define GST_PAD_PROBE_TYPE_ALL_BOTH (GST_PAD_PROBE_TYPE_DATA_BOTH | \
GST_PAD_PROBE_TYPE_QUERY_BOTH)
#define GST_PAD_PROBE_TYPE_SCHEDULING (GST_PAD_PROBE_TYPE_PUSH | GST_PAD_PROBE_TYPE_PULL)
/**