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 35 extern int dsp_options; 36 extern int dsp_debug; 37 extern int dsp_poll; 38 extern int dsp_tics; 39 extern spinlock_t dsp_lock; 40 extern struct work_struct dsp_workq; 41 extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */ 42 43 /*************** 44 * audio stuff * 45 ***************/ 46 47 extern s32 dsp_audio_alaw_to_s32[256]; 48 extern s32 dsp_audio_ulaw_to_s32[256]; 49 extern s32 *dsp_audio_law_to_s32; 50 extern u8 dsp_audio_s16_to_law[65536]; 51 extern u8 dsp_audio_alaw_to_ulaw[256]; 52 extern u8 dsp_audio_mix_law[65536]; 53 extern u8 dsp_audio_seven2law[128]; 54 extern u8 dsp_audio_law2seven[256]; 55 extern void dsp_audio_generate_law_tables(void); 56 extern void dsp_audio_generate_s2law_table(void); 57 extern void dsp_audio_generate_seven(void); 58 extern void dsp_audio_generate_mix_table(void); 59 extern void dsp_audio_generate_ulaw_samples(void); 60 extern void dsp_audio_generate_volume_changes(void); 61 extern 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 78 extern struct timer_list dsp_spl_tl; 79 extern 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) */ 90 struct dsp; 91 struct dsp_conf_member { 92 struct list_head list; 93 struct dsp *dsp; 94 }; 95 96 /* the list of all conferences */ 97 struct 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 */ 117 118 struct dsp_dtmf { 119 int treshold; /* above this is dtmf (square of) */ 120 int software; /* dtmf uses software decoding */ 121 int hardware; /* dtmf uses hardware decoding */ 122 int size; /* number of bytes in buffer */ 123 signed short buffer[DSP_DTMF_NPOINTS]; 124 /* buffers one full dtmf frame */ 125 u8 lastwhat, lastdigit; 126 int count; 127 u8 digits[16]; /* just the dtmf result */ 128 }; 129 130 131 /****************** 132 * pipeline stuff * 133 ******************/ 134 struct dsp_pipeline { 135 rwlock_t lock; 136 struct list_head list; 137 int inuse; 138 }; 139 140 /*************** 141 * tones stuff * 142 ***************/ 143 144 struct dsp_tone { 145 int software; /* tones are generated by software */ 146 int hardware; /* tones are generated by hardware */ 147 int tone; 148 void *pattern; 149 int count; 150 int index; 151 struct timer_list tl; 152 }; 153 154 /***************** 155 * general stuff * 156 *****************/ 157 158 struct dsp { 159 struct list_head list; 160 struct mISDNchannel ch; 161 struct mISDNchannel *up; 162 unsigned char name[64]; 163 int b_active; 164 int echo; /* echo is enabled */ 165 int rx_disabled; /* what the user wants */ 166 int rx_is_off; /* what the card is */ 167 int tx_mix; 168 struct dsp_tone tone; 169 struct dsp_dtmf dtmf; 170 int tx_volume, rx_volume; 171 172 /* queue for sending frames */ 173 struct work_struct workq; 174 struct sk_buff_head sendq; 175 int hdlc; /* if mode is hdlc */ 176 int data_pending; /* currently an unconfirmed frame */ 177 178 /* conference stuff */ 179 u32 conf_id; 180 struct dsp_conf *conf; 181 struct dsp_conf_member 182 *member; 183 184 /* buffer stuff */ 185 int rx_W; /* current write pos for data without timestamp */ 186 int rx_R; /* current read pos for transmit clock */ 187 int rx_init; /* if set, pointers will be adjusted first */ 188 int tx_W; /* current write pos for transmit data */ 189 int tx_R; /* current read pos for transmit clock */ 190 int rx_delay[MAX_SECONDS_JITTER_CHECK]; 191 int tx_delay[MAX_SECONDS_JITTER_CHECK]; 192 u8 tx_buff[CMX_BUFF_SIZE]; 193 u8 rx_buff[CMX_BUFF_SIZE]; 194 int last_tx; /* if set, we transmitted last poll interval */ 195 int cmx_delay; /* initial delay of buffers, 196 or 0 for dynamic jitter buffer */ 197 int tx_dejitter; /* if set, dejitter tx buffer */ 198 int tx_data; /* enables tx-data of CMX to upper layer */ 199 200 /* hardware stuff */ 201 struct dsp_features features; 202 int features_rx_off; /* set if rx_off is featured */ 203 int features_fill_empty; /* set if fill_empty is featured */ 204 int pcm_slot_rx; /* current PCM slot (or -1) */ 205 int pcm_bank_rx; 206 int pcm_slot_tx; 207 int pcm_bank_tx; 208 int hfc_conf; /* unique id of current conference (or -1) */ 209 210 /* encryption stuff */ 211 int bf_enable; 212 u32 bf_p[18]; 213 u32 bf_s[1024]; 214 int bf_crypt_pos; 215 u8 bf_data_in[9]; 216 u8 bf_crypt_out[9]; 217 int bf_decrypt_in_pos; 218 int bf_decrypt_out_pos; 219 u8 bf_crypt_inring[16]; 220 u8 bf_data_out[9]; 221 int bf_sync; 222 223 struct dsp_pipeline 224 pipeline; 225 }; 226 227 /* functions */ 228 229 extern void dsp_change_volume(struct sk_buff *skb, int volume); 230 231 extern struct list_head dsp_ilist; 232 extern struct list_head conf_ilist; 233 extern void dsp_cmx_debug(struct dsp *dsp); 234 extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp); 235 extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id); 236 extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb); 237 extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb); 238 extern void dsp_cmx_send(void *arg); 239 extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb); 240 extern int dsp_cmx_del_conf_member(struct dsp *dsp); 241 extern int dsp_cmx_del_conf(struct dsp_conf *conf); 242 243 extern void dsp_dtmf_goertzel_init(struct dsp *dsp); 244 extern void dsp_dtmf_hardware(struct dsp *dsp); 245 extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, 246 int fmt); 247 248 extern int dsp_tone(struct dsp *dsp, int tone); 249 extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len); 250 extern void dsp_tone_timeout(void *arg); 251 252 extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len); 253 extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len); 254 extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen); 255 extern void dsp_bf_cleanup(struct dsp *dsp); 256 257 extern int dsp_pipeline_module_init(void); 258 extern void dsp_pipeline_module_exit(void); 259 extern int dsp_pipeline_init(struct dsp_pipeline *pipeline); 260 extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline); 261 extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg); 262 extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, 263 int len); 264 extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, 265 int len); 266 267