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 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 ******************/ 135 struct dsp_pipeline { 136 rwlock_t lock; 137 struct list_head list; 138 int inuse; 139 }; 140 141 /*************** 142 * tones stuff * 143 ***************/ 144 145 struct 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 ***************/ 158 159 struct 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 *****************/ 167 168 struct 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 */ 238 239 extern void dsp_change_volume(struct sk_buff *skb, int volume); 240 241 extern struct list_head dsp_ilist; 242 extern struct list_head conf_ilist; 243 extern void dsp_cmx_debug(struct dsp *dsp); 244 extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp); 245 extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id); 246 extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb); 247 extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb); 248 extern void dsp_cmx_send(void *arg); 249 extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb); 250 extern int dsp_cmx_del_conf_member(struct dsp *dsp); 251 extern int dsp_cmx_del_conf(struct dsp_conf *conf); 252 253 extern void dsp_dtmf_goertzel_init(struct dsp *dsp); 254 extern void dsp_dtmf_hardware(struct dsp *dsp); 255 extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, 256 int fmt); 257 258 extern int dsp_tone(struct dsp *dsp, int tone); 259 extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len); 260 extern void dsp_tone_timeout(void *arg); 261 262 extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len); 263 extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len); 264 extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen); 265 extern void dsp_bf_cleanup(struct dsp *dsp); 266 267 extern int dsp_pipeline_module_init(void); 268 extern void dsp_pipeline_module_exit(void); 269 extern int dsp_pipeline_init(struct dsp_pipeline *pipeline); 270 extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline); 271 extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg); 272 extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, 273 int len); 274 extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, 275 int len, unsigned int txlen); 276 277