retronetworking
/
mISDN
13
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
mISDN/drivers/isdn/hardware/mISDN/dsp.h

299 lines
7.7 KiB
C
Raw Blame History

/* $Id$
*
* Audio support data for ISDN4Linux.
*
* Copyright 2002/2003 by Andreas Eversberg (jolly@eversberg.eu)
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#define DEBUG_DSP_MGR 0x0001
#define DEBUG_DSP_CORE 0x0002
#define DEBUG_DSP_DTMF 0x0004
#define DEBUG_DSP_DTMFCOEFF 0x0008
#define DEBUG_DSP_CMX 0x0010
#define DEBUG_DSP_TONE 0x0020
#define DEBUG_DSP_BLOWFISH 0x0040
#define DEBUG_DSP_DELAY 0x0080
/* options may be:
*
* bit 0 = use ulaw instead of alaw
* bit 1 = enable hfc hardware accelleration for all channels
*
*/
#define DSP_OPT_ULAW (1<<0)
#define DSP_OPT_NOHARDWARE (1<<1)
#define FEAT_STATE_INIT 1
#define FEAT_STATE_WAIT 2
#define FEAT_STATE_RECEIVED 3
#include <linux/timer.h>
#ifdef MISDN_MEMDEBUG
#include "memdbg.h"
#endif
#include "dsp_ecdis.h"
/*
* You are now able to choose between the Mark2 and the
* kb1 Echo cancellor. Just comment the one and comment
* out the other.
*/
//#define AGGRESSIVE_SUPPRESSOR
//#include "dsp_mec2.h"
//#include "dsp_kb1ec.h"
#include "dsp_mg2ec.h"
/*
* uncomment this one to cancel echo more aggressive
*/
//#define AGGRESSIVE_SUPPRESSOR
extern int dsp_options;
extern int dsp_debug;
extern int dsp_poll;
extern int dsp_tics;
/***************
* audio stuff *
***************/
extern s32 dsp_audio_alaw_to_s32[256];
extern s32 dsp_audio_ulaw_to_s32[256];
extern s32 *dsp_audio_law_to_s32;
extern u8 dsp_audio_s16_to_law[65536];
extern u8 dsp_audio_alaw_to_ulaw[256];
extern u8 dsp_audio_mix_law[65536];
extern u8 dsp_audio_seven2law[128];
extern u8 dsp_audio_law2seven[256];
extern void dsp_audio_generate_s2law_table(void);
extern void dsp_audio_generate_seven(void);
extern void dsp_audio_generate_mix_table(void);
extern void dsp_audio_generate_ulaw_samples(void);
extern void dsp_audio_generate_volume_changes(void);
extern u8 dsp_silence;
/*************
* cmx stuff *
*************/
#define MAX_POLL 256 /* maximum number of send-chunks */
#define CMX_BUFF_SIZE 0x8000 /* must be 2**n (0x1000 about 1/2 second) */
#define CMX_BUFF_HALF 0x4000 /* CMX_BUFF_SIZE / 2 */
#define CMX_BUFF_MASK 0x7fff /* CMX_BUFF_SIZE - 1 */
/* how many seconds will we check the lowest delay until the jitter buffer
is reduced by that delay */
#define MAX_SECONDS_JITTER_CHECK 5
extern struct timer_list dsp_spl_tl;
extern u64 dsp_spl_jiffies;
/* the structure of conferences:
*
* each conference has a unique number, given by user space.
* the conferences are linked in a chain.
* each conference has members linked in a chain.
* each dsplayer points to a member, each member points to a dsplayer.
*/
/* all members within a conference (this is linked 1:1 with the dsp) */
struct _dsp;
typedef struct _conf_member {
struct list_head list;
struct _dsp *dsp;
} conf_member_t;
/* the list of all conferences */
typedef struct _conference {
struct list_head list;
u32 id; /* all cmx stacks with the same ID are connected */
struct list_head mlist;
int software; /* conf is processed by software */
int hardware; /* conf is processed by hardware */
} conference_t;
extern mISDNobject_t dsp_obj;
/**************
* DTMF stuff *
**************/
#define DSP_DTMF_NPOINTS 102
#define ECHOCAN_BUFLEN 4*128
typedef struct _dtmf_t {
int treshold; /* above this is dtmf (square of) */
int software; /* dtmf uses software decoding */
int hardware; /* dtmf uses hardware decoding */
int size; /* number of bytes in buffer */
signed short buffer[DSP_DTMF_NPOINTS]; /* buffers one full dtmf frame */
u8 lastwhat, lastdigit;
int count;
u8 digits[16]; /* just the dtmf result */
} dtmf_t;
/****************
* cancel stuff *
****************/
/***************
* tones stuff *
***************/
typedef struct _tone_t {
int software; /* tones are generated by software */
int hardware; /* tones are generated by hardware */
int tone;
void *pattern;
int count;
int index;
struct timer_list tl;
} tone_t;
/*****************
* general stuff *
*****************/
#define DELAY_CHECK 8000
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 has_jitter; /* data is jittered and unsorted */
};
typedef struct _dsp {
struct list_head list;
mISDNinstance_t inst;
int b_active;
int echo; /* echo is done by software */
int rx_disabled;
int tx_mix;
tone_t tone;
dtmf_t dtmf;
int queue_dtmf; /* flags enabled dtmf, prior feature reply */
int tx_volume, rx_volume;
/* conference stuff */
u32 conf_id;
conference_t *conf;
conf_member_t *member;
/* while we're waiting for the hw */
u32 queue_conf_id; /* stores conf id prior feature reply */
/* buffer stuff */
int rx_W; /* current write pos for data without timestamp */
int rx_R; /* current read pos for transmit clock */
int tx_W; /* current write pos for transmit data */
int tx_R; /* current read pos for transmit clock */
int delay[MAX_SECONDS_JITTER_CHECK];
u8 tx_buff[CMX_BUFF_SIZE];
u8 rx_buff[CMX_BUFF_SIZE];
/* hardware stuff */
struct dsp_features features; /* features */
struct timer_list feature_tl;
spinlock_t feature_lock;
int feature_state;
int pcm_slot_rx; /* current PCM slot (or -1) */
int pcm_bank_rx;
int pcm_slot_tx;
int pcm_bank_tx;
int hfc_conf; /* unique id of current conference (or -1) */
/* encryption stuff */
int bf_enable;
u32 bf_p[18];
u32 bf_s[1024];
int bf_crypt_pos;
u8 bf_data_in[9];
u8 bf_crypt_out[9];
int bf_decrypt_in_pos;
int bf_decrypt_out_pos;
u8 bf_crypt_inring[16];
u8 bf_data_out[9];
int bf_sync;
/* echo cancellation stuff */
int queue_cancel[3]; /* stores cancel values prior feature reply */
int cancel_enable;
int cancel_hardware; /*we are using hw echo canc*/
struct echo_can_state * ec; /**< == NULL: echo cancellation disabled;
!= NULL: echo cancellation enabled */
echo_can_disable_detector_state_t* ecdis_rd;
echo_can_disable_detector_state_t* ecdis_wr;
uint16_t echotimer;
uint16_t echostate;
uint16_t echolastupdate;
char txbuf[ECHOCAN_BUFLEN];
int txbuflen;
char rxbuf[ECHOCAN_BUFLEN];
int rxbuflen;
} dsp_t;
/* functions */
extern void dsp_change_volume(struct sk_buff *skb, int volume);
extern struct list_head Conf_list;
extern void dsp_cmx_debug(dsp_t *dsp);
extern void dsp_cmx_hardware(conference_t *conf, dsp_t *dsp);
extern int dsp_cmx_conf(dsp_t *dsp, u32 conf_id);
extern void dsp_cmx_receive(dsp_t *dsp, struct sk_buff *skb);
#ifdef OLDCMX
extern struct sk_buff *dsp_cmx_send(dsp_t *dsp, int len, int dinfo);
#else
extern void dsp_cmx_send(void *data);
#endif
extern void dsp_cmx_transmit(dsp_t *dsp, struct sk_buff *skb);
extern int dsp_cmx_del_conf_member(dsp_t *dsp);
extern int dsp_cmx_del_conf(conference_t *conf);
extern void dsp_dtmf_goertzel_init(dsp_t *dsp);
extern u8 *dsp_dtmf_goertzel_decode(dsp_t *dsp, u8 *data, int len, int fmt);
extern int dsp_tone(dsp_t *dsp, int tone);
extern void dsp_tone_copy(dsp_t *dsp, u8 *data, int len);
extern void dsp_tone_timeout(void *arg);
extern void dsp_bf_encrypt(dsp_t *dsp, u8 *data, int len);
extern void dsp_bf_decrypt(dsp_t *dsp, u8 *data, int len);
extern int dsp_bf_init(dsp_t *dsp, const u8 *key, unsigned int keylen);
extern void dsp_bf_cleanup(dsp_t *dsp);
extern void dsp_cancel_tx(dsp_t *dsp, u8 *data, int len);
extern void dsp_cancel_rx(dsp_t *dsp, u8 *data, int len);
extern int dsp_cancel_init(dsp_t *dsp, int taps, int training, int delay);
Reference in New Issue View Git Blame Copy Permalink