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>
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

View File

@ -198,6 +198,7 @@ struct dsp {
/* hardware stuff */
struct dsp_features features;
int features_rx_off; /* set if rx_off is featured */
int features_fill_empty; /* set if fill_empty is featured */
int pcm_slot_rx; /* current PCM slot (or -1) */
int pcm_bank_rx;
int pcm_slot_tx;