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 acceleration 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 80 /* the datatype need to match jiffies datatype */ 81 extern unsigned long dsp_spl_jiffies; 82 83 /* the structure of conferences: 84 * 85 * each conference has a unique number, given by user space. 86 * the conferences are linked in a chain. 87 * each conference has members linked in a chain. 88 * each dsplayer points to a member, each member points to a dsplayer. 89 */ 90 91 /* all members within a conference (this is linked 1:1 with the dsp) */ 92 struct dsp; 93 struct dsp_conf_member { 94 struct list_head list; 95 struct dsp *dsp; 96 }; 97 98 /* the list of all conferences */ 99 struct dsp_conf { 100 struct list_head list; 101 u32 id; 102 /* all cmx stacks with the same ID are 103 connected */ 104 struct list_head mlist; 105 int software; /* conf is processed by software */ 106 int hardware; /* conf is processed by hardware */ 107 /* note: if both unset, has only one member */ 108 }; 109 110 111 /************** 112 * DTMF stuff * 113 **************/ 114 115 #define DSP_DTMF_NPOINTS 102 116 117 #define ECHOCAN_BUFF_SIZE 0x400 /* must be 2**n */ 118 #define ECHOCAN_BUFF_MASK 0x3ff /* -1 */ 119 120 struct dsp_dtmf { 121 int enable; /* dtmf is enabled */ 122 int treshold; /* above this is dtmf (square of) */ 123 int software; /* dtmf uses software decoding */ 124 int hardware; /* dtmf uses hardware decoding */ 125 int size; /* number of bytes in buffer */ 126 signed short buffer[DSP_DTMF_NPOINTS]; 127 /* buffers one full dtmf frame */ 128 u8 lastwhat, lastdigit; 129 int count; 130 u8 digits[16]; /* dtmf result */ 131 }; 132 133 134 /****************** 135 * pipeline stuff * 136 ******************/ 137 struct dsp_pipeline { 138 rwlock_t lock; 139 struct list_head list; 140 int inuse; 141 }; 142 143 /*************** 144 * tones stuff * 145 ***************/ 146 147 struct dsp_tone { 148 int software; /* tones are generated by software */ 149 int hardware; /* tones are generated by hardware */ 150 int tone; 151 void *pattern; 152 int count; 153 int index; 154 struct timer_list tl; 155 }; 156 157 /*************** 158 * echo stuff * 159 ***************/ 160 161 struct dsp_echo { 162 int software; /* echo is generated by software */ 163 int hardware; /* echo is generated by hardware */ 164 }; 165 166 /***************** 167 * general stuff * 168 *****************/ 169 170 struct dsp { 171 struct list_head list; 172 struct mISDNchannel ch; 173 struct mISDNchannel *up; 174 unsigned char name[64]; 175 int b_active; 176 struct dsp_echo echo; 177 int rx_disabled; /* what the user wants */ 178 int rx_is_off; /* what the card is */ 179 int tx_mix; 180 struct dsp_tone tone; 181 struct dsp_dtmf dtmf; 182 int tx_volume, rx_volume; 183 184 /* queue for sending frames */ 185 struct work_struct workq; 186 struct sk_buff_head sendq; 187 int hdlc; /* if mode is hdlc */ 188 int data_pending; /* currently an unconfirmed frame */ 189 190 /* conference stuff */ 191 u32 conf_id; 192 struct dsp_conf *conf; 193 struct dsp_conf_member 194 *member; 195 196 /* buffer stuff */ 197 int rx_W; /* current write pos for data without timestamp */ 198 int rx_R; /* current read pos for transmit clock */ 199 int rx_init; /* if set, pointers will be adjusted first */ 200 int tx_W; /* current write pos for transmit data */ 201 int tx_R; /* current read pos for transmit clock */ 202 int rx_delay[MAX_SECONDS_JITTER_CHECK]; 203 int tx_delay[MAX_SECONDS_JITTER_CHECK]; 204 u8 tx_buff[CMX_BUFF_SIZE]; 205 u8 rx_buff[CMX_BUFF_SIZE]; 206 int last_tx; /* if set, we transmitted last poll interval */ 207 int cmx_delay; /* initial delay of buffers, 208 or 0 for dynamic jitter buffer */ 209 int tx_dejitter; /* if set, dejitter tx buffer */ 210 int tx_data; /* enables tx-data of CMX to upper layer */ 211 212 /* hardware stuff */ 213 struct dsp_features features; 214 int features_rx_off; /* set if rx_off is featured */ 215 int features_fill_empty; /* set if fill_empty is featured */ 216 int pcm_slot_rx; /* current PCM slot (or -1) */ 217 int pcm_bank_rx; 218 int pcm_slot_tx; 219 int pcm_bank_tx; 220 int hfc_conf; /* unique id of current conference (or -1) */ 221 222 /* encryption stuff */ 223 int bf_enable; 224 u32 bf_p[18]; 225 u32 bf_s[1024]; 226 int bf_crypt_pos; 227 u8 bf_data_in[9]; 228 u8 bf_crypt_out[9]; 229 int bf_decrypt_in_pos; 230 int bf_decrypt_out_pos; 231 u8 bf_crypt_inring[16]; 232 u8 bf_data_out[9]; 233 int bf_sync; 234 235 struct dsp_pipeline 236 pipeline; 237 }; 238 239 /* functions */ 240 241 extern void dsp_change_volume(struct sk_buff *skb, int volume); 242 243 extern struct list_head dsp_ilist; 244 extern struct list_head conf_ilist; 245 extern void dsp_cmx_debug(struct dsp *dsp); 246 extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp); 247 extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id); 248 extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb); 249 extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb); 250 extern void dsp_cmx_send(void *arg); 251 extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb); 252 extern int dsp_cmx_del_conf_member(struct dsp *dsp); 253 extern int dsp_cmx_del_conf(struct dsp_conf *conf); 254 255 extern void dsp_dtmf_goertzel_init(struct dsp *dsp); 256 extern void dsp_dtmf_hardware(struct dsp *dsp); 257 extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, 258 int fmt); 259 260 extern int dsp_tone(struct dsp *dsp, int tone); 261 extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len); 262 extern void dsp_tone_timeout(void *arg); 263 264 extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len); 265 extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len); 266 extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen); 267 extern void dsp_bf_cleanup(struct dsp *dsp); 268 269 extern int dsp_pipeline_module_init(void); 270 extern void dsp_pipeline_module_exit(void); 271 extern int dsp_pipeline_init(struct dsp_pipeline *pipeline); 272 extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline); 273 extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg); 274 extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, 275 int len); 276 extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, 277 int len, unsigned int txlen); 278