mISDN: Hardware acceleration is now possible in conjunction with audio recording

Audio recording requires software audio processing.
Both hardware and software processing is simultaniously possible now.

Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
index 41c6cfdca8c8..564ea3efd5e3 100644
--- a/drivers/isdn/mISDN/dsp.h
+++ b/drivers/isdn/mISDN/dsp.h
@@ -151,6 +151,15 @@ struct dsp_tone {
         struct timer_list tl;
 };
 
+/***************
+ * echo stuff *
+ ***************/
+
+struct dsp_echo {
+        int             software; /* echo is generated by software */
+        int             hardware; /* echo is generated by hardware */
+};
+
 /*****************
  * general stuff *
  *****************/
@@ -161,7 +170,7 @@ struct dsp {
         struct mISDNchannel     *up;
         unsigned char   name[64];
         int             b_active;
-        int             echo; /* echo is enabled */
+        struct dsp_echo echo;
         int             rx_disabled; /* what the user wants */
         int             rx_is_off; /* what the card is */
         int             tx_mix;