168 lines
4.7 KiB
C
168 lines
4.7 KiB
C
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/* $Id$
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*
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* Audio support data for ISDN4Linux.
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*
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* Copyright 2002/2003 by Andreas Eversberg (jolly@jolly.de)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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/* compile using hardware features (if supported by hardware) */
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//#define WITH_HARDWARE
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#define DEBUG_DSP_MGR 0x0001
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#define DEBUG_DSP_CORE 0x0002
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#define DEBUG_DSP_DTMF 0x0004
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#define DEBUG_DSP_DTMFCOEFF 0x0008
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#define DEBUG_DSP_CMX 0x0010
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#define DEBUG_DSP_TONE 0x0020
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#ifdef HAS_WORKQUEUE
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#include <linux/workqueue.h>
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#else
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#include <linux/tqueue.h>
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#endif
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/***************
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* audio stuff *
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***************/
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extern signed long dsp_audio_ulaw_to_s32[256];
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extern signed long dsp_audio_alaw_to_s32[256];
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extern unsigned char dsp_audio_s16_to_ulaw[65536];
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extern unsigned char dsp_audio_s16_to_alaw[65536];
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extern unsigned char dsp_audio_alaw_to_ulaw[256];
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extern unsigned char dsp_audio_ulaw_to_alaw[256];
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extern unsigned char flip[256];
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extern unsigned char *dsp_audio_alaw_change[16];
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extern unsigned char *dsp_audio_ulaw_change[16];
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extern void dsp_audio_generate_s2law_tables(int noflip);
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extern void dsp_audio_flip_tables(int noflip);
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extern void dsp_audio_flip_and_generate_ulaw_samples(int noflip);
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extern void dsp_audio_generate_volume_changes(void);
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extern unsigned char ulawsilence, alawsilence;
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/*************
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* cmx stuff *
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*************/
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#define CMX_BUFF_SIZE 0x4000 /* must be 2**n */
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#define CMX_BUFF_HALF 0x2000 /* CMX_BUFF_SIZE / 2 */
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#define CMX_BUFF_MASK 0x3fff /* CMX_BUFF_SIZE - 1 */
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#define SEND_LEN 64 /* chunk length for mixed data to card */
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/* the structure of conferences:
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*
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* each conference has a unique number, given by user space.
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* the conferences are linked in a chain.
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* each conference has members linked in a chain.
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* each dsplayer points to a member, each member points to a dsplayer.
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*/
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/* all members within a conference (this is linked 1:1 with the dsp) */
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struct _dsp;
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typedef struct _conf_member {
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struct _conf_member *prev;
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struct _conf_member *next;
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struct _dsp *dsp;
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} conf_member_t;
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/* the list of all conferences */
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typedef struct _conference {
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struct _conference *prev;
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struct _conference *next;
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u_int id; /* all cmx stacks with the same ID are connected */
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conf_member_t *mlist;
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int solution; /* currently connected via -1=software 0=hardware 1-8=conference unit (hardware is only possible on the same chip) */
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u_int hfc_id; /* unique id to identify the chip */
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int largest; /* largest frame received in conf's life. */
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int W_min, W_max; /* min/maximum rx-write pointer of members */
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signed long conf_buff[CMX_BUFF_SIZE];
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} conference_t;
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extern mISDNobject_t dsp_obj;
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/**************
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* DTMF stuff *
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**************/
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#define DSP_DTMF_NPOINTS 102
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typedef struct _dmtf_t {
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int software; /* dtmf uses software decoding */
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int hardware; /* dtmf uses hardware decoding */
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int size; /* number of bytes in buffer */
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signed short buffer[DSP_DTMF_NPOINTS]; /* buffers one full dtmf frame */
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unsigned char lastwhat, lastdigit;
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int count;
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unsigned char digits[16]; /* just the dtmf result */
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} dtmf_t;
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/***************
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* tones stuff *
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***************/
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typedef struct _tone_t {
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int tone;
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void *pattern;
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int count;
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int index;
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} tone_t;
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/*****************
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* general stuff *
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*****************/
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typedef struct _dsp {
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struct _dsp *prev;
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struct _dsp *next;
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int debug;
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u_int hfc_id; /* unique id to identify the chip (or 0) */
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mISDNinstance_t inst;
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int largest; /* largest frame received in dsp's life. */
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int b_active;
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int tx_pending;
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int conf_id;
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int echo;
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int rx_disabled;
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int tx_mix;
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conference_t *conf;
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conf_member_t *member;
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tone_t tone;
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dtmf_t dtmf;
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int tx_volume, rx_volume;
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int ulaw;
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struct work_struct sendwork; /* event for sending data */
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int R_tx, W_tx; /* pointers of transmit buffer */
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int R_rx, W_rx; /* pointers of receive buffer and conference buffer */
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unsigned char tx_buff[CMX_BUFF_SIZE];
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unsigned char rx_buff[CMX_BUFF_SIZE];
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} dsp_t;
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extern void dsp_change_volume(struct sk_buff *skb, int volume, int ulaw);
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extern conference_t *Conf_list;
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extern void dsp_cmx_debug(dsp_t *dsp);
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extern int dsp_cmx(dsp_t *dsp);
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extern void dsp_cmx_receive(dsp_t *dsp, struct sk_buff *skb);
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extern struct sk_buff *dsp_cmx_send(dsp_t *dsp, int len, int dinfo);
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extern void dsp_cmx_transmit(dsp_t *dsp, struct sk_buff *skb);
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extern int dsp_cmx_del_conf_member(dsp_t *dsp);
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extern int dsp_cmx_del_conf(conference_t *conf);
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extern void dsp_dtmf_goertzel_init(dsp_t *dsp);
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extern unsigned char *dsp_dtmf_goertzel_decode(dsp_t *dsp, unsigned char *data, int len, int fmt);
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extern int dsp_tone(dsp_t *dsp, int tone);
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extern void dsp_tone_copy(dsp_t *dsp, unsigned char *data, int len);
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