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Add mISDN DSP

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Enable support for digital audio processing capability.
This module may be used for special applications that require
cross connecting of bchannels, conferencing, dtmf decoding
echo cancelation, tone generation, and Blowfish encryption and
decryption.
It may use hardware features if available.

Signed-off-by: Karsten Keil <kkeil@suse.de>
This commit is contained in:
Karsten Keil 2008-07-27 01:56:38 +02:00
parent 1b2b03f8e5
commit 960366cf8d
15 changed files with 6028 additions and 0 deletions
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37
include/linux/mISDNdsp.h Normal file
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#ifndef __mISDNdsp_H__
#define __mISDNdsp_H__
struct mISDN_dsp_element_arg {
char *name;
char *def;
char *desc;
};
struct mISDN_dsp_element {
char *name;
void *(*new)(const char *arg);
void (*free)(void *p);
void (*process_tx)(void *p, unsigned char *data, int len);
void (*process_rx)(void *p, unsigned char *data, int len);
int num_args;
struct mISDN_dsp_element_arg
*args;
};
extern int mISDN_dsp_element_register(struct mISDN_dsp_element *elem);
extern void mISDN_dsp_element_unregister(struct mISDN_dsp_element *elem);
struct dsp_features {
int hfc_id; /* unique id to identify the chip (or -1) */
int hfc_dtmf; /* set if HFCmulti card supports dtmf */
int hfc_loops; /* set if card supports tone loops */
int hfc_echocanhw; /* set if card supports echocancelation*/
int pcm_id; /* unique id to identify the pcm bus (or -1) */
int pcm_slots; /* number of slots on the pcm bus */
int pcm_banks; /* number of IO banks of pcm bus */
int unclocked; /* data is not clocked (has jitter/loss) */
int unordered; /* data is unordered (packets have index) */
};
#endif