GRAPH_C2C
ret = graph_parse_node(priv, GRAPH_C2C, codec1_ep, li, 0);
ret = graph_parse_node(priv, GRAPH_C2C, codec0_ep, li, 1);
case GRAPH_C2C:
case GRAPH_C2C:
ret = GRAPH_C2C;
case GRAPH_C2C:
case GRAPH_C2C: