Forum Post: set osd win prm call function

hi all ,when i call the following code to set osd parameter,which function is called.

System_linkControl(
SYSTEM_LINK_ID_ALG_0,
ALG_LINK_OSD_CMD_SET_CHANNEL_WIN_PRM,
&g_osdChParam[chId],
sizeof(AlgLink_OsdChWinParams),
TRUE
);

i search two function :

(1)mcfw/src_bios6/links_c6xdsp/alg_link:AlgLink_OsdalgSetChOsdWinPrm

(2)mcfw/src_bios6/links_common/alg_link:AlgLink_osdAlgSetChOsdWinPrm

i found that the function (1) is called.and when the function (2) is called?

what differences are between the two function ?

tks