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_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); 263 264