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Add gst_element_request_compatible_pad and remove gst_element_request_pad.
Original commit message from CVS: Add gst_element_request_compatible_pad and remove gst_element_request_pad. Implemented something reasonable for gst_element_request_compatible_pad, but havn't tested much: it won't work for tee because the pad templates have no caps, and negotiation is not yet written, so it is assumed that the tee pads can't connect to anything.
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3 changed files with 99 additions and 9 deletions
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@ -344,19 +344,79 @@ gst_element_get_padtemplate_by_name (GstElement *element, const guchar *name)
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return NULL;
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}
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/**
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* gst_element_get_padtemplate_by_compatible:
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* @element: element to get padtemplate of
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* @templ: a template to find a compatible template for
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*
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* Generate a padtemplate for this element compatible with the given
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* template, ie able to link to it.
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*
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* Returns: the padtemplate
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*/
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static GstPadTemplate*
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gst_element_get_padtemplate_by_compatible (GstElement *element, GstPadTemplate *compattempl)
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{
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GstPadTemplate *newtempl = NULL;
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GList *padlist;
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GST_DEBUG(0,"gst_element_get_padtemplate_by_compatible()\n");
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (compattempl != NULL, NULL);
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padlist = gst_element_get_padtemplate_list (element);
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while (padlist) {
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GstPadTemplate *padtempl = (GstPadTemplate*) padlist->data;
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gboolean compat = FALSE;
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// Ignore name
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// Ignore presence
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// Check direction (must be opposite)
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// Check caps
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GST_DEBUG(0,"checking direction and caps\n");
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if (padtempl->direction == GST_PAD_SRC &&
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compattempl->direction == GST_PAD_SINK) {
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GST_DEBUG(0,"compatible direction: found src pad template\n");
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compat = gst_caps_list_check_compatibility(padtempl->caps,
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compattempl->caps);
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GST_DEBUG(0,"caps are %scompatible\n", (compat?"":"not "));
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} else if (padtempl->direction == GST_PAD_SINK &&
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compattempl->direction == GST_PAD_SRC) {
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GST_DEBUG(0,"compatible direction: found sink pad template\n");
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compat = gst_caps_list_check_compatibility(compattempl->caps,
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padtempl->caps);
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GST_DEBUG(0,"caps are %scompatible\n", (compat?"":"not "));
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}
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if (compat) {
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newtempl = padtempl;
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break;
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}
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padlist = g_list_next (padlist);
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}
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return newtempl;
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}
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/**
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* gst_element_request_pad:
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* @element: element to request a new pad from
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* @templ: the padtemplate specifuing the pad to get.
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* @templ: the padtemplate specifying the pad to connect to.
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*
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* Request a new pad from the element. The template will
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* be used to decide what type of pad to create. This function
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* is typically used for elements with a padtemplate with presence
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* GST_PAD_REQUEST.
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*
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* Returns: the new pad that was created.
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* Returns: the new pad that was created, NULL if no suitable pad can be
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* created.
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*/
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GstPad*
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static GstPad*
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gst_element_request_pad (GstElement *element, GstPadTemplate *templ)
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{
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GstPad *newpad = NULL;
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@ -374,6 +434,35 @@ gst_element_request_pad (GstElement *element, GstPadTemplate *templ)
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return newpad;
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}
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/**
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* gst_element_request_compatible_pad:
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* @element: element to request a new pad from
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* @templ: a pad template to which the new pad should be able to connect
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*
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* Request a new pad from the element. The template will
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* be used to decide what type of pad to create. This function
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* is typically used for elements with a padtemplate with presence
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* GST_PAD_REQUEST.
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*
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* Returns: the new pad that was created.
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*/
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GstPad*
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gst_element_request_compatible_pad (GstElement *element, GstPadTemplate *templ)
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{
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GstPadTemplate *templ_new;
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GstPad *pad = NULL;
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g_return_val_if_fail (element != NULL, NULL);
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g_return_val_if_fail (GST_IS_ELEMENT (element), NULL);
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g_return_val_if_fail (templ != NULL, NULL);
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templ_new = gst_element_get_padtemplate_by_compatible (element, templ);
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if (templ_new != NULL)
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pad = gst_element_request_pad (element, templ_new);
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return pad;
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}
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/**
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* gst_element_request_pad_by_name:
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* @element: element to request a new pad from
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@ -211,7 +211,7 @@ GstPadTemplate* gst_element_get_padtemplate_by_name (GstElement *element, const
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void gst_element_add_ghost_pad (GstElement *element, GstPad *pad, gchar *name);
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void gst_element_remove_ghost_pad (GstElement *element, GstPad *pad);
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GstPad* gst_element_request_pad (GstElement *element, GstPadTemplate *templ);
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GstPad* gst_element_request_compatible_pad (GstElement *element, GstPadTemplate *templ);
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GstPad* gst_element_request_pad_by_name (GstElement *element, const gchar *name);
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void gst_element_connect (GstElement *src, const gchar *srcpadname,
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11
tests/tee.c
11
tests/tee.c
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@ -22,15 +22,16 @@ main(int argc, char *argv[])
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templ = gst_element_get_padtemplate_by_name (mp3parse, "sink");
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templ = gst_padtemplate_create ("src%d", GST_PAD_SRC, GST_PAD_REQUEST, templ->caps);
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pad = gst_element_request_pad (element, templ);
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pad = gst_element_request_compatible_pad (element, templ);
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g_print ("new pad %s\n", gst_pad_get_name (pad));
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parent = xmlNewChild (doc->xmlRootNode, NULL, "Padtemplate", NULL);
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if (pad != NULL) {
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parent = xmlNewChild (doc->xmlRootNode, NULL, "Padtemplate", NULL);
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gst_padtemplate_save_thyself (pad->padtemplate, parent);
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gst_padtemplate_save_thyself (pad->padtemplate, parent);
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xmlDocDump(stdout, doc);
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xmlDocDump(stdout, doc);
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}
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return 0;
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}
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