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960366cf KK |
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 | |
190f71d9 | 18 | #define DEBUG_DSP_CLOCK 0x0200 |
960366cf KK |
19 | #define DEBUG_DSP_DTMFCOEFF 0x8000 /* heavy output */ |
20 | ||
21 | /* options may be: | |
22 | * | |
23 | * bit 0 = use ulaw instead of alaw | |
25985edc | 24 | * bit 1 = enable hfc hardware acceleration for all channels |
960366cf KK |
25 | * |
26 | */ | |
475be4d8 JP |
27 | #define DSP_OPT_ULAW (1 << 0) |
28 | #define DSP_OPT_NOHARDWARE (1 << 1) | |
960366cf KK |
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; | |
9cf6ace5 KK |
79 | |
80 | /* the datatype need to match jiffies datatype */ | |
81 | extern unsigned long dsp_spl_jiffies; | |
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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; | |
475be4d8 JP |
102 | /* all cmx stacks with the same ID are |
103 | connected */ | |
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104 | struct list_head mlist; |
105 | int software; /* conf is processed by software */ | |
106 | int hardware; /* conf is processed by hardware */ | |
475be4d8 | 107 | /* note: if both unset, has only one member */ |
960366cf KK |
108 | }; |
109 | ||
110 | ||
111 | /************** | |
112 | * DTMF stuff * | |
113 | **************/ | |
114 | ||
115 | #define DSP_DTMF_NPOINTS 102 | |
116 | ||
a5355c27 AE |
117 | #define ECHOCAN_BUFF_SIZE 0x400 /* must be 2**n */ |
118 | #define ECHOCAN_BUFF_MASK 0x3ff /* -1 */ | |
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119 | |
120 | struct dsp_dtmf { | |
b0579d74 | 121 | int enable; /* dtmf is enabled */ |
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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]; | |
475be4d8 | 127 | /* buffers one full dtmf frame */ |
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128 | u8 lastwhat, lastdigit; |
129 | int count; | |
b5df5a5c | 130 | u8 digits[16]; /* dtmf result */ |
960366cf KK |
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 | ||
bc138ec4 AE |
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 | ||
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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; | |
bc138ec4 | 176 | struct dsp_echo echo; |
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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 | |
475be4d8 | 194 | *member; |
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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, | |
475be4d8 | 208 | or 0 for dynamic jitter buffer */ |
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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 */ | |
8dd2f36f | 215 | int features_fill_empty; /* set if fill_empty is featured */ |
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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 | |
475be4d8 | 236 | pipeline; |
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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, | |
475be4d8 | 258 | int fmt); |
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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, | |
475be4d8 | 275 | int len); |
960366cf | 276 | extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, |
475be4d8 | 277 | int len, unsigned int txlen); |