fix(swf of optek link):support sample rate 32K in swf mode

@@ -89,6 +89,10 @@ if (optek_link_mode == TWS_SUBW_W_BT_SF44K || optek_link_mode == TWS_SUBW_W_BT_T
 {
 	app_main_data.playing_stream_sample_rate = 44100;
 }
+else if (optek_link_mode == SUBW_SF32K_PT2P5MS || optek_link_mode == TWS_SUBW_SF32K_PT5MS)
+{
+	app_main_data.playing_stream_sample_rate = 32000;
+}
 else
 {
 	app_main_data.playing_stream_sample_rate = 48000;

@@ -846,6 +846,11 @@ void hw_audio_pll_clk_adj_by_drift(double drift)
 		//11.2896 11.2896*8*6/24 = 22.5792
 		base_val = 22.5792;
 	}
+	else if (app_main_data.playing_stream_sample_rate == 32000)
+	{
+		//8.192 8.192*8*6/24 = 16.384
+		base_val = 16.384;
+	}	
 	else 
 	{
 		//not support now,study later

@@ -370,6 +370,10 @@ extern FIFO audio_delay_fifo;
 		{
 			app_change_mode_req(SUBW_SF44K_PT2P5MS,24,6);
 		}
+		else if (app_main_data.playing_stream_sample_rate == 32000)
+		{
+			app_change_mode_req(SUBW_SF32K_PT2P5MS,24,6);
+		}
 		else
 		{
 			DBG_Printf("optek link not support sample rate\r\n");
@@ -1357,7 +1361,7 @@ u8 optek_link_slave_conn_cb (u8 mode, u8 *slave_max_tx_len, u8 *slave_max_rx_len
 		*slave_max_tx_len = OPTEK_LINK_MASTER_NO_RX_LEN;
 		*slave_max_rx_len = 49;
 	}
-	else if (mode == SUBW_SF48K_PT2P5MS || mode == SUBW_SF44K_PT2P5MS)
+	else if (mode == SUBW_SF48K_PT2P5MS || mode == SUBW_SF44K_PT2P5MS || mode == SUBW_SF32K_PT2P5MS)
 	{
 		*slave_max_tx_len = OPTEK_LINK_MASTER_NO_RX_LEN;
 		*slave_max_rx_len = 24;