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mISDN: Add feature via MISDN_CTRL_FILL_EMPTY to fill fifo if empty

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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>
This commit is contained in:
Andreas Eversberg
2008-08-02 22:51:52 +02:00
committed by Karsten Keil
parent 69e656cc16
commit 8dd2f36f31
9 changed files with 165 additions and 45 deletions
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25
include/linux/mISDNhw.h
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@@ -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