mISDN: Add feature via MISDN_CTRL_FILL_EMPTY to fill fifo if empty
This prevents underrun of fifo when filled and in case of an underrun it
prevents subsequent underruns due to jitter.
Improve dsp, so buffers are kept filled with a certain delay, so moderate
jitter will not cause underrun all the time -> the audio quality is highly
improved. tones are not interrupted by gaps anymore, except when CPU is
stalling or in high load.
Signed-off-by: Andreas Eversberg <andreas@eversberg.eu>
Signed-off-by: Karsten Keil <kkeil@suse.de>
diff --git a/include/linux/mISDNhw.h b/include/linux/mISDNhw.h
index e794dfb..9384b92 100644
--- a/include/linux/mISDNhw.h
+++ b/include/linux/mISDNhw.h
@@ -57,20 +57,21 @@
#define FLG_L2DATA 14 /* channel use L2 DATA primitivs */
#define FLG_ORIGIN 15 /* channel is on origin site */
/* channel specific stuff */
+#define FLG_FILLEMPTY 16 /* fill fifo on first frame (empty) */
/* arcofi specific */
-#define FLG_ARCOFI_TIMER 16
-#define FLG_ARCOFI_ERROR 17
+#define FLG_ARCOFI_TIMER 17
+#define FLG_ARCOFI_ERROR 18
/* isar specific */
-#define FLG_INITIALIZED 16
-#define FLG_DLEETX 17
-#define FLG_LASTDLE 18
-#define FLG_FIRST 19
-#define FLG_LASTDATA 20
-#define FLG_NMD_DATA 21
-#define FLG_FTI_RUN 22
-#define FLG_LL_OK 23
-#define FLG_LL_CONN 24
-#define FLG_DTMFSEND 25
+#define FLG_INITIALIZED 17
+#define FLG_DLEETX 18
+#define FLG_LASTDLE 19
+#define FLG_FIRST 20
+#define FLG_LASTDATA 21
+#define FLG_NMD_DATA 22
+#define FLG_FTI_RUN 23
+#define FLG_LL_OK 24
+#define FLG_LL_CONN 25
+#define FLG_DTMFSEND 26
/* workq events */
#define FLG_RECVQUEUE 30
diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h
index 8f2d60d..74c903c 100644
--- a/include/linux/mISDNif.h
+++ b/include/linux/mISDNif.h
@@ -312,6 +312,7 @@
#define MISDN_CTRL_SETPEER 0x0040
#define MISDN_CTRL_UNSETPEER 0x0080
#define MISDN_CTRL_RX_OFF 0x0100
+#define MISDN_CTRL_FILL_EMPTY 0x0200
#define MISDN_CTRL_HW_FEATURES_OP 0x2000
#define MISDN_CTRL_HW_FEATURES 0x2001
#define MISDN_CTRL_HFC_OP 0x4000