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gerrit-public.fairphone.software / kernel / msm-4.19 / 4944dd62de21230af039eda7cd218e9a09021d11 / . / drivers / isdn / mISDN / dsp.h
blob: 6c3fed6b8d4f830a7aca4843ce833a2a1d0250ca [file] [log] [blame]
Karsten Keil960366c2008-07-27 01:56:38 +0200[diff] [blame]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
34extern int dsp_options;
35extern int dsp_debug;
36extern int dsp_poll;
37extern int dsp_tics;
38extern spinlock_t dsp_lock;
39extern struct work_struct dsp_workq;
40extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */
41
42/***************
43 * audio stuff *
44 ***************/
45
46extern s32 dsp_audio_alaw_to_s32[256];
47extern s32 dsp_audio_ulaw_to_s32[256];
48extern s32 *dsp_audio_law_to_s32;
49extern u8 dsp_audio_s16_to_law[65536];
50extern u8 dsp_audio_alaw_to_ulaw[256];
51extern u8 dsp_audio_mix_law[65536];
52extern u8 dsp_audio_seven2law[128];
53extern u8 dsp_audio_law2seven[256];
54extern void dsp_audio_generate_law_tables(void);
55extern void dsp_audio_generate_s2law_table(void);
56extern void dsp_audio_generate_seven(void);
57extern void dsp_audio_generate_mix_table(void);
58extern void dsp_audio_generate_ulaw_samples(void);
59extern void dsp_audio_generate_volume_changes(void);
60extern 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
77extern struct timer_list dsp_spl_tl;
78extern 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) */
89struct dsp;
90struct dsp_conf_member {
91 struct list_head list;
92 struct dsp *dsp;
93};
94
95/* the list of all conferences */
96struct 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
116struct 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 ******************/
132struct dsp_pipeline {
133 rwlock_t lock;
134 struct list_head list;
135 int inuse;
136};
137
138/***************
139 * tones stuff *
140 ***************/
141
142struct 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
156struct 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
226extern void dsp_change_volume(struct sk_buff *skb, int volume);
227
228extern struct list_head dsp_ilist;
229extern struct list_head conf_ilist;
230extern void dsp_cmx_debug(struct dsp *dsp);
231extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp);
232extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id);
233extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb);
234extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb);
235extern void dsp_cmx_send(void *arg);
236extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb);
237extern int dsp_cmx_del_conf_member(struct dsp *dsp);
238extern int dsp_cmx_del_conf(struct dsp_conf *conf);
239
240extern void dsp_dtmf_goertzel_init(struct dsp *dsp);
241extern void dsp_dtmf_hardware(struct dsp *dsp);
242extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len,
243 int fmt);
244
245extern int dsp_tone(struct dsp *dsp, int tone);
246extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len);
247extern void dsp_tone_timeout(void *arg);
248
249extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len);
250extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len);
251extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen);
252extern void dsp_bf_cleanup(struct dsp *dsp);
253
254extern int dsp_pipeline_module_init(void);
255extern void dsp_pipeline_module_exit(void);
256extern int dsp_pipeline_init(struct dsp_pipeline *pipeline);
257extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline);
258extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
259extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
260 int len);
261extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
262 int len);
263