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basetransform: Implement POSITION query

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Fixes bug #623541.
This commit is contained in:
Sebastian Dröge 2010-07-05 10:36:05 +02:00
parent 7fa58dbebd
commit e2db318921
1 changed files with 52 additions and 0 deletions
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52
libs/gst/base/gstbasetransform.c
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@ -326,6 +326,8 @@ static gboolean gst_base_transform_acceptcaps_default (GstBaseTransform * trans,
static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static gboolean gst_base_transform_query (GstPad * pad, GstQuery * query);
static const GstQueryType *gst_base_transform_query_type (GstPad * pad);
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
@ -402,6 +404,10 @@ gst_base_transform_init (GstBaseTransform * trans,
GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate_push));
gst_pad_set_bufferalloc_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_buffer_alloc));
gst_pad_set_query_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_query));
gst_pad_set_query_type_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_query_type));
gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
pad_template =
@ -420,6 +426,10 @@ gst_base_transform_init (GstBaseTransform * trans,
GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
gst_pad_set_activatepull_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_src_activate_pull));
gst_pad_set_query_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_query));
gst_pad_set_query_type_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_query_type));
gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
trans->transform_lock = g_mutex_new ();
@ -1183,6 +1193,48 @@ failed_configure:
}
}
static gboolean
gst_base_transform_query (GstPad * pad, GstQuery * query)
{
gboolean ret = FALSE;
GstBaseTransform *trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
GstPad *otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
if (format == GST_FORMAT_TIME && trans->segment.format == GST_FORMAT_TIME) {
ret = TRUE;
gst_query_set_position (query, format,
gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME,
trans->segment.last_stop));
} else {
ret = gst_pad_peer_query (otherpad, query);
}
break;
}
default:
ret = gst_pad_peer_query (otherpad, query);
break;
}
gst_object_unref (trans);
return ret;
}
static const GstQueryType *
gst_base_transform_query_type (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_NONE
};
return types;
}
/* Allocate a buffer using gst_pad_alloc_buffer
*
* This function can do renegotiation on the source pad