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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 | /* * Audio support data for ISDN4Linux. * * Copyright 2002/2003 by Andreas Eversberg (jolly@eversberg.eu) * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * */ #define DEBUG_DSP_CTRL 0x0001 #define DEBUG_DSP_CORE 0x0002 #define DEBUG_DSP_DTMF 0x0004 #define DEBUG_DSP_CMX 0x0010 #define DEBUG_DSP_TONE 0x0020 #define DEBUG_DSP_BLOWFISH 0x0040 #define DEBUG_DSP_DELAY 0x0100 #define DEBUG_DSP_CLOCK 0x0200 #define DEBUG_DSP_DTMFCOEFF 0x8000 /* heavy output */ /* options may be: * * bit 0 = use ulaw instead of alaw * bit 1 = enable hfc hardware acceleration for all channels * */ #define DSP_OPT_ULAW (1 << 0) #define DSP_OPT_NOHARDWARE (1 << 1) #include <linux/timer.h> #include <linux/workqueue.h> #include "dsp_ecdis.h" extern int dsp_options; extern int dsp_debug; extern int dsp_poll; extern int dsp_tics; extern spinlock_t dsp_lock; extern struct work_struct dsp_workq; extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */ /*************** * audio stuff * ***************/ extern s32 dsp_audio_alaw_to_s32[256]; extern s32 dsp_audio_ulaw_to_s32[256]; extern s32 *dsp_audio_law_to_s32; extern u8 dsp_audio_s16_to_law[65536]; extern u8 dsp_audio_alaw_to_ulaw[256]; extern u8 dsp_audio_mix_law[65536]; extern u8 dsp_audio_seven2law[128]; extern u8 dsp_audio_law2seven[256]; extern void dsp_audio_generate_law_tables(void); extern void dsp_audio_generate_s2law_table(void); extern void dsp_audio_generate_seven(void); extern void dsp_audio_generate_mix_table(void); extern void dsp_audio_generate_ulaw_samples(void); extern void dsp_audio_generate_volume_changes(void); extern u8 dsp_silence; /************* * cmx stuff * *************/ #define MAX_POLL 256 /* maximum number of send-chunks */ #define CMX_BUFF_SIZE 0x8000 /* must be 2**n (0x1000 about 1/2 second) */ #define CMX_BUFF_HALF 0x4000 /* CMX_BUFF_SIZE / 2 */ #define CMX_BUFF_MASK 0x7fff /* CMX_BUFF_SIZE - 1 */ /* how many seconds will we check the lowest delay until the jitter buffer is reduced by that delay */ #define MAX_SECONDS_JITTER_CHECK 5 extern struct timer_list dsp_spl_tl; /* the datatype need to match jiffies datatype */ extern unsigned long dsp_spl_jiffies; /* the structure of conferences: * * each conference has a unique number, given by user space. * the conferences are linked in a chain. * each conference has members linked in a chain. * each dsplayer points to a member, each member points to a dsplayer. */ /* all members within a conference (this is linked 1:1 with the dsp) */ struct dsp; struct dsp_conf_member { struct list_head list; struct dsp *dsp; }; /* the list of all conferences */ struct dsp_conf { struct list_head list; u32 id; /* all cmx stacks with the same ID are connected */ struct list_head mlist; int software; /* conf is processed by software */ int hardware; /* conf is processed by hardware */ /* note: if both unset, has only one member */ }; /************** * DTMF stuff * **************/ #define DSP_DTMF_NPOINTS 102 #define ECHOCAN_BUFF_SIZE 0x400 /* must be 2**n */ #define ECHOCAN_BUFF_MASK 0x3ff /* -1 */ struct dsp_dtmf { int enable; /* dtmf is enabled */ int treshold; /* above this is dtmf (square of) */ int software; /* dtmf uses software decoding */ int hardware; /* dtmf uses hardware decoding */ int size; /* number of bytes in buffer */ signed short buffer[DSP_DTMF_NPOINTS]; /* buffers one full dtmf frame */ u8 lastwhat, lastdigit; int count; u8 digits[16]; /* dtmf result */ }; /****************** * pipeline stuff * ******************/ struct dsp_pipeline { rwlock_t lock; struct list_head list; int inuse; }; /*************** * tones stuff * ***************/ struct dsp_tone { int software; /* tones are generated by software */ int hardware; /* tones are generated by hardware */ int tone; void *pattern; int count; int index; struct timer_list tl; }; /*************** * echo stuff * ***************/ struct dsp_echo { int software; /* echo is generated by software */ int hardware; /* echo is generated by hardware */ }; /***************** * general stuff * *****************/ struct dsp { struct list_head list; struct mISDNchannel ch; struct mISDNchannel *up; unsigned char name[64]; int b_active; struct dsp_echo echo; int rx_disabled; /* what the user wants */ int rx_is_off; /* what the card is */ int tx_mix; struct dsp_tone tone; struct dsp_dtmf dtmf; int tx_volume, rx_volume; /* queue for sending frames */ struct work_struct workq; struct sk_buff_head sendq; int hdlc; /* if mode is hdlc */ int data_pending; /* currently an unconfirmed frame */ /* conference stuff */ u32 conf_id; struct dsp_conf *conf; struct dsp_conf_member *member; /* buffer stuff */ int rx_W; /* current write pos for data without timestamp */ int rx_R; /* current read pos for transmit clock */ int rx_init; /* if set, pointers will be adjusted first */ int tx_W; /* current write pos for transmit data */ int tx_R; /* current read pos for transmit clock */ int rx_delay[MAX_SECONDS_JITTER_CHECK]; int tx_delay[MAX_SECONDS_JITTER_CHECK]; u8 tx_buff[CMX_BUFF_SIZE]; u8 rx_buff[CMX_BUFF_SIZE]; int last_tx; /* if set, we transmitted last poll interval */ int cmx_delay; /* initial delay of buffers, or 0 for dynamic jitter buffer */ int tx_dejitter; /* if set, dejitter tx buffer */ int tx_data; /* enables tx-data of CMX to upper layer */ /* hardware stuff */ struct dsp_features features; int features_rx_off; /* set if rx_off is featured */ int features_fill_empty; /* set if fill_empty is featured */ int pcm_slot_rx; /* current PCM slot (or -1) */ int pcm_bank_rx; int pcm_slot_tx; int pcm_bank_tx; int hfc_conf; /* unique id of current conference (or -1) */ /* encryption stuff */ int bf_enable; u32 bf_p[18]; u32 bf_s[1024]; int bf_crypt_pos; u8 bf_data_in[9]; u8 bf_crypt_out[9]; int bf_decrypt_in_pos; int bf_decrypt_out_pos; u8 bf_crypt_inring[16]; u8 bf_data_out[9]; int bf_sync; struct dsp_pipeline pipeline; }; /* functions */ extern void dsp_change_volume(struct sk_buff *skb, int volume); extern struct list_head dsp_ilist; extern struct list_head conf_ilist; extern void dsp_cmx_debug(struct dsp *dsp); extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp); extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id); extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb); extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb); extern void dsp_cmx_send(struct timer_list *arg); extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb); extern int dsp_cmx_del_conf_member(struct dsp *dsp); extern int dsp_cmx_del_conf(struct dsp_conf *conf); extern void dsp_dtmf_goertzel_init(struct dsp *dsp); extern void dsp_dtmf_hardware(struct dsp *dsp); extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, int fmt); extern int dsp_tone(struct dsp *dsp, int tone); extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len); extern void dsp_tone_timeout(struct timer_list *t); extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len); extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len); extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen); extern void dsp_bf_cleanup(struct dsp *dsp); extern int dsp_pipeline_module_init(void); extern void dsp_pipeline_module_exit(void); extern int dsp_pipeline_init(struct dsp_pipeline *pipeline); extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline); extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg); extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, int len); extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len, unsigned int txlen); |