/** * gst_navigation_query_new_angles: * * Create a new #GstNavigation angles query. When executed, it will * query the pipeline for the set of currently available angles, which may be * greater than one in a multiangle video. * * Returns: The new query. * Since: 0.10.23 */ GstQuery * gst_navigation_query_new_angles (void) { GstQuery *query; GstStructure *structure; structure = gst_structure_new (GST_NAVIGATION_QUERY_NAME, "type", G_TYPE_STRING, "angles", NULL); query = gst_query_new_application (GST_QUERY_CUSTOM, structure); return query; }
static GstStateChangeReturn gst_visual_gl_change_state (GstElement * element, GstStateChange transition) { GstVisualGL *visual = GST_VISUAL_GL (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: { GstElement *parent = GST_ELEMENT (gst_element_get_parent (visual)); GstStructure *structure = NULL; GstQuery *query = NULL; gboolean isPerformed = FALSE; gchar *name; if (!parent) { GST_ELEMENT_ERROR (visual, CORE, STATE_CHANGE, (NULL), ("A parent bin is required")); return FALSE; } name = gst_element_get_name (visual); structure = gst_structure_new (name, NULL); query = gst_query_new_application (GST_QUERY_CUSTOM, structure); g_free (name); isPerformed = gst_element_query (parent, query); if (isPerformed) { const GValue *id_value = gst_structure_get_value (structure, "gstgldisplay"); if (G_VALUE_HOLDS_POINTER (id_value)) /* at least one gl element is after in our gl chain */ visual->display = gst_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value))); else { /* this gl filter is a sink in terms of the gl chain */ visual->display = gst_gl_display_new (); gst_gl_display_create_context (visual->display, 0); //TODO visual->external_gl_context); } gst_visual_gl_reset (visual); visual->actor = visual_actor_new (GST_VISUAL_GL_GET_CLASS (visual)->plugin->info-> plugname); visual->video = visual_video_new (); visual->audio = visual_audio_new (); if (!visual->actor || !visual->video) goto actor_setup_failed; gst_gl_display_thread_add (visual->display, (GstGLDisplayThreadFunc) actor_setup, visual); if (visual->actor_setup_result != 0) goto actor_setup_failed; else visual_actor_set_video (visual->actor, visual->video); } gst_query_unref (query); gst_object_unref (GST_OBJECT (parent)); if (!isPerformed) return GST_STATE_CHANGE_FAILURE; } break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: { if (visual->fbo) { gst_gl_display_del_fbo (visual->display, visual->fbo, visual->depthbuffer); visual->fbo = 0; visual->depthbuffer = 0; } if (visual->midtexture) { gst_gl_display_del_texture (visual->display, visual->midtexture, visual->width, visual->height); visual->midtexture = 0; } if (visual->display) { gst_object_unref (visual->display); visual->display = NULL; } gst_visual_gl_clear_actors (visual); } break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; /* ERRORS */ actor_setup_failed: { GST_ELEMENT_ERROR (visual, LIBRARY, INIT, (NULL), ("could not set up actor")); gst_visual_gl_clear_actors (visual); return GST_STATE_CHANGE_FAILURE; } }