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