LXR linux/drivers/isdn/mISDN/dsp.h

   1/*
   2 * Audio support data for ISDN4Linux.
   3 *
   4 * Copyright 2002/2003 by Andreas Eversberg (jolly@eversberg.eu)
   5 *
   6 * This software may be used and distributed according to the terms
   7 * of the GNU General Public License, incorporated herein by reference.
   8 *
   9 */
  10
  11#define DEBUG_DSP_CTRL          0x0001
  12#define DEBUG_DSP_CORE          0x0002
  13#define DEBUG_DSP_DTMF          0x0004
  14#define DEBUG_DSP_CMX           0x0010
  15#define DEBUG_DSP_TONE          0x0020
  16#define DEBUG_DSP_BLOWFISH      0x0040
  17#define DEBUG_DSP_DELAY         0x0100
  18#define DEBUG_DSP_CLOCK         0x0200
  19#define DEBUG_DSP_DTMFCOEFF     0x8000 /* heavy output */
  20
  21/* options may be:
  22 *
  23 * bit 0 = use ulaw instead of alaw
  24 * bit 1 = enable hfc hardware accelleration for all channels
  25 *
  26 */
  27#define DSP_OPT_ULAW            (1<<0)
  28#define DSP_OPT_NOHARDWARE      (1<<1)
  29
  30#include <linux/timer.h>
  31#include <linux/workqueue.h>
  32
  33#include "dsp_ecdis.h"
  34
  35extern int dsp_options;
  36extern int dsp_debug;
  37extern int dsp_poll;
  38extern int dsp_tics;
  39extern spinlock_t dsp_lock;
  40extern struct work_struct dsp_workq;
  41extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */
  42
  43/***************
  44 * audio stuff *
  45 ***************/
  46
  47extern s32 dsp_audio_alaw_to_s32[256];
  48extern s32 dsp_audio_ulaw_to_s32[256];
  49extern s32 *dsp_audio_law_to_s32;
  50extern u8 dsp_audio_s16_to_law[65536];
  51extern u8 dsp_audio_alaw_to_ulaw[256];
  52extern u8 dsp_audio_mix_law[65536];
  53extern u8 dsp_audio_seven2law[128];
  54extern u8 dsp_audio_law2seven[256];
  55extern void dsp_audio_generate_law_tables(void);
  56extern void dsp_audio_generate_s2law_table(void);
  57extern void dsp_audio_generate_seven(void);
  58extern void dsp_audio_generate_mix_table(void);
  59extern void dsp_audio_generate_ulaw_samples(void);
  60extern void dsp_audio_generate_volume_changes(void);
  61extern u8 dsp_silence;
  62
  63
  64/*************
  65 * cmx stuff *
  66 *************/
  67
  68#define MAX_POLL        256     /* maximum number of send-chunks */
  69
  70#define CMX_BUFF_SIZE   0x8000  /* must be 2**n (0x1000 about 1/2 second) */
  71#define CMX_BUFF_HALF   0x4000  /* CMX_BUFF_SIZE / 2 */
  72#define CMX_BUFF_MASK   0x7fff  /* CMX_BUFF_SIZE - 1 */
  73
  74/* how many seconds will we check the lowest delay until the jitter buffer
  75   is reduced by that delay */
  76#define MAX_SECONDS_JITTER_CHECK 5
  77
  78extern struct timer_list dsp_spl_tl;
  79extern u32 dsp_spl_jiffies;
  80
  81/* the structure of conferences:
  82 *
  83 * each conference has a unique number, given by user space.
  84 * the conferences are linked in a chain.
  85 * each conference has members linked in a chain.
  86 * each dsplayer points to a member, each member points to a dsplayer.
  87 */
  88
  89/* all members within a conference (this is linked 1:1 with the dsp) */
  90struct dsp;
  91struct dsp_conf_member {
  92        struct list_head        list;
  93        struct dsp              *dsp;
  94};
  95
  96/* the list of all conferences */
  97struct dsp_conf {
  98        struct list_head        list;
  99        u32                     id;
 100                                /* all cmx stacks with the same ID are
 101                                 connected */
 102        struct list_head        mlist;
 103        int                     software; /* conf is processed by software */
 104        int                     hardware; /* conf is processed by hardware */
 105                                /* note: if both unset, has only one member */
 106};
 107
 108
 109/**************
 110 * DTMF stuff *
 111 **************/
 112
 113#define DSP_DTMF_NPOINTS 102
 114
 115#define ECHOCAN_BUFF_SIZE 0x400 /* must be 2**n */
 116#define ECHOCAN_BUFF_MASK 0x3ff /* -1 */
 117
 118struct dsp_dtmf {
 119        int             enable; /* dtmf is enabled */
 120        int             treshold; /* above this is dtmf (square of) */
 121        int             software; /* dtmf uses software decoding */
 122        int             hardware; /* dtmf uses hardware decoding */
 123        int             size; /* number of bytes in buffer */
 124        signed short    buffer[DSP_DTMF_NPOINTS];
 125                /* buffers one full dtmf frame */
 126        u8              lastwhat, lastdigit;
 127        int             count;
 128        u8              digits[16]; /* dtmf result */
 129};
 130
 131
 132/******************
 133 * pipeline stuff *
 134 ******************/
 135struct dsp_pipeline {
 136        rwlock_t  lock;
 137        struct list_head list;
 138        int inuse;
 139};
 140
 141/***************
 142 * tones stuff *
 143 ***************/
 144
 145struct dsp_tone {
 146        int             software; /* tones are generated by software */
 147        int             hardware; /* tones are generated by hardware */
 148        int             tone;
 149        void            *pattern;
 150        int             count;
 151        int             index;
 152        struct timer_list tl;
 153};
 154
 155/***************
 156 * echo stuff *
 157 ***************/
 158
 159struct dsp_echo {
 160        int             software; /* echo is generated by software */
 161        int             hardware; /* echo is generated by hardware */
 162};
 163
 164/*****************
 165 * general stuff *
 166 *****************/
 167
 168struct dsp {
 169        struct list_head list;
 170        struct mISDNchannel     ch;
 171        struct mISDNchannel     *up;
 172        unsigned char   name[64];
 173        int             b_active;
 174        struct dsp_echo echo;
 175        int             rx_disabled; /* what the user wants */
 176        int             rx_is_off; /* what the card is */
 177        int             tx_mix;
 178        struct dsp_tone tone;
 179        struct dsp_dtmf dtmf;
 180        int             tx_volume, rx_volume;
 181
 182        /* queue for sending frames */
 183        struct work_struct      workq;
 184        struct sk_buff_head     sendq;
 185        int             hdlc;   /* if mode is hdlc */
 186        int             data_pending;   /* currently an unconfirmed frame */
 187
 188        /* conference stuff */
 189        u32             conf_id;
 190        struct dsp_conf *conf;
 191        struct dsp_conf_member
 192                        *member;
 193
 194        /* buffer stuff */
 195        int             rx_W; /* current write pos for data without timestamp */
 196        int             rx_R; /* current read pos for transmit clock */
 197        int             rx_init; /* if set, pointers will be adjusted first */
 198        int             tx_W; /* current write pos for transmit data */
 199        int             tx_R; /* current read pos for transmit clock */
 200        int             rx_delay[MAX_SECONDS_JITTER_CHECK];
 201        int             tx_delay[MAX_SECONDS_JITTER_CHECK];
 202        u8              tx_buff[CMX_BUFF_SIZE];
 203        u8              rx_buff[CMX_BUFF_SIZE];
 204        int             last_tx; /* if set, we transmitted last poll interval */
 205        int             cmx_delay; /* initial delay of buffers,
 206                                or 0 for dynamic jitter buffer */
 207        int             tx_dejitter; /* if set, dejitter tx buffer */
 208        int             tx_data; /* enables tx-data of CMX to upper layer */
 209
 210        /* hardware stuff */
 211        struct dsp_features features;
 212        int             features_rx_off; /* set if rx_off is featured */
 213        int             features_fill_empty; /* set if fill_empty is featured */
 214        int             pcm_slot_rx; /* current PCM slot (or -1) */
 215        int             pcm_bank_rx;
 216        int             pcm_slot_tx;
 217        int             pcm_bank_tx;
 218        int             hfc_conf; /* unique id of current conference (or -1) */
 219
 220        /* encryption stuff */
 221        int             bf_enable;
 222        u32             bf_p[18];
 223        u32             bf_s[1024];
 224        int             bf_crypt_pos;
 225        u8              bf_data_in[9];
 226        u8              bf_crypt_out[9];
 227        int             bf_decrypt_in_pos;
 228        int             bf_decrypt_out_pos;
 229        u8              bf_crypt_inring[16];
 230        u8              bf_data_out[9];
 231        int             bf_sync;
 232
 233        struct dsp_pipeline
 234                        pipeline;
 235};
 236
 237/* functions */
 238
 239extern void dsp_change_volume(struct sk_buff *skb, int volume);
 240
 241extern struct list_head dsp_ilist;
 242extern struct list_head conf_ilist;
 243extern void dsp_cmx_debug(struct dsp *dsp);
 244extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp);
 245extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id);
 246extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb);
 247extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb);
 248extern void dsp_cmx_send(void *arg);
 249extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb);
 250extern int dsp_cmx_del_conf_member(struct dsp *dsp);
 251extern int dsp_cmx_del_conf(struct dsp_conf *conf);
 252
 253extern void dsp_dtmf_goertzel_init(struct dsp *dsp);
 254extern void dsp_dtmf_hardware(struct dsp *dsp);
 255extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len,
 256                int fmt);
 257
 258extern int dsp_tone(struct dsp *dsp, int tone);
 259extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len);
 260extern void dsp_tone_timeout(void *arg);
 261
 262extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len);
 263extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len);
 264extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen);
 265extern void dsp_bf_cleanup(struct dsp *dsp);
 266
 267extern int  dsp_pipeline_module_init(void);
 268extern void dsp_pipeline_module_exit(void);
 269extern int  dsp_pipeline_init(struct dsp_pipeline *pipeline);
 270extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline);
 271extern int  dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
 272extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
 273                int len);
 274extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
 275                int len, unsigned int txlen);
 276
 277