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(struct timer_list *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(struct timer_list *t); |
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 | |