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gerrit-public.fairphone.software / kernel / msm-4.9 / 5d707e9c8ef2a3596ed5c975c6ff05cec890c2b4 / . / drivers / isdn / mISDN / dsp.h
blob: 98a33c58f0911f4b7482eb40a949a9a2412407f2 [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
Andreas Eversberg190f71d2008-08-03 10:36:53 +0200[diff] [blame]18#define DEBUG_DSP_CLOCK 0x0200
Karsten Keil960366c2008-07-27 01:56:38 +0200[diff] [blame]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 accelleration 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
35extern int dsp_options;
36extern int dsp_debug;
37extern int dsp_poll;
38extern int dsp_tics;
39extern spinlock_t dsp_lock;
40extern struct work_struct dsp_workq;
41extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */
42
43/***************
44 * audio stuff *
45 ***************/
46
47extern s32 dsp_audio_alaw_to_s32[256];
48extern s32 dsp_audio_ulaw_to_s32[256];
49extern s32 *dsp_audio_law_to_s32;
50extern u8 dsp_audio_s16_to_law[65536];
51extern u8 dsp_audio_alaw_to_ulaw[256];
52extern u8 dsp_audio_mix_law[65536];
53extern u8 dsp_audio_seven2law[128];
54extern u8 dsp_audio_law2seven[256];
55extern void dsp_audio_generate_law_tables(void);
56extern void dsp_audio_generate_s2law_table(void);
57extern void dsp_audio_generate_seven(void);
58extern void dsp_audio_generate_mix_table(void);
59extern void dsp_audio_generate_ulaw_samples(void);
60extern void dsp_audio_generate_volume_changes(void);
61extern 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
78extern struct timer_list dsp_spl_tl;
79extern u32 dsp_spl_jiffies;
80
81/* the structure of conferences:
82 *
83 * each conference has a unique number, given by user space.
84 * the conferences are linked in a chain.
85 * each conference has members linked in a chain.
86 * each dsplayer points to a member, each member points to a dsplayer.
87 */
88
89/* all members within a conference (this is linked 1:1 with the dsp) */
90struct dsp;
91struct dsp_conf_member {
92 struct list_head list;
93 struct dsp *dsp;
94};
95
96/* the list of all conferences */
97struct dsp_conf {
98 struct list_head list;
99 u32 id;
100 /* all cmx stacks with the same ID are
101 connected */
102 struct list_head mlist;
103 int software; /* conf is processed by software */
104 int hardware; /* conf is processed by hardware */
105 /* note: if both unset, has only one member */
106};
107
108
109/**************
110 * DTMF stuff *
111 **************/
112
113#define DSP_DTMF_NPOINTS 102
114
115#define ECHOCAN_BUFLEN (4*128)
116
117struct dsp_dtmf {
118 int treshold; /* above this is dtmf (square of) */
119 int software; /* dtmf uses software decoding */
120 int hardware; /* dtmf uses hardware decoding */
121 int size; /* number of bytes in buffer */
122 signed short buffer[DSP_DTMF_NPOINTS];
123 /* buffers one full dtmf frame */
124 u8 lastwhat, lastdigit;
125 int count;
126 u8 digits[16]; /* just the dtmf result */
127};
128
129
130/******************
131 * pipeline stuff *
132 ******************/
133struct dsp_pipeline {
134 rwlock_t lock;
135 struct list_head list;
136 int inuse;
137};
138
139/***************
140 * tones stuff *
141 ***************/
142
143struct dsp_tone {
144 int software; /* tones are generated by software */
145 int hardware; /* tones are generated by hardware */
146 int tone;
147 void *pattern;
148 int count;
149 int index;
150 struct timer_list tl;
151};
152
153/*****************
154 * general stuff *
155 *****************/
156
157struct dsp {
158 struct list_head list;
159 struct mISDNchannel ch;
160 struct mISDNchannel *up;
161 unsigned char name[64];
162 int b_active;
163 int echo; /* echo is enabled */
164 int rx_disabled; /* what the user wants */
165 int rx_is_off; /* what the card is */
166 int tx_mix;
167 struct dsp_tone tone;
168 struct dsp_dtmf dtmf;
169 int tx_volume, rx_volume;
170
171 /* queue for sending frames */
172 struct work_struct workq;
173 struct sk_buff_head sendq;
174 int hdlc; /* if mode is hdlc */
175 int data_pending; /* currently an unconfirmed frame */
176
177 /* conference stuff */
178 u32 conf_id;
179 struct dsp_conf *conf;
180 struct dsp_conf_member
181 *member;
182
183 /* buffer stuff */
184 int rx_W; /* current write pos for data without timestamp */
185 int rx_R; /* current read pos for transmit clock */
186 int rx_init; /* if set, pointers will be adjusted first */
187 int tx_W; /* current write pos for transmit data */
188 int tx_R; /* current read pos for transmit clock */
189 int rx_delay[MAX_SECONDS_JITTER_CHECK];
190 int tx_delay[MAX_SECONDS_JITTER_CHECK];
191 u8 tx_buff[CMX_BUFF_SIZE];
192 u8 rx_buff[CMX_BUFF_SIZE];
193 int last_tx; /* if set, we transmitted last poll interval */
194 int cmx_delay; /* initial delay of buffers,
195 or 0 for dynamic jitter buffer */
196 int tx_dejitter; /* if set, dejitter tx buffer */
197 int tx_data; /* enables tx-data of CMX to upper layer */
198
199 /* hardware stuff */
200 struct dsp_features features;
201 int features_rx_off; /* set if rx_off is featured */
Andreas Eversberg8dd2f362008-08-02 22:51:52 +0200[diff] [blame]202 int features_fill_empty; /* set if fill_empty is featured */
Karsten Keil960366c2008-07-27 01:56:38 +0200[diff] [blame]203 int pcm_slot_rx; /* current PCM slot (or -1) */
204 int pcm_bank_rx;
205 int pcm_slot_tx;
206 int pcm_bank_tx;
207 int hfc_conf; /* unique id of current conference (or -1) */
208
209 /* encryption stuff */
210 int bf_enable;
211 u32 bf_p[18];
212 u32 bf_s[1024];
213 int bf_crypt_pos;
214 u8 bf_data_in[9];
215 u8 bf_crypt_out[9];
216 int bf_decrypt_in_pos;
217 int bf_decrypt_out_pos;
218 u8 bf_crypt_inring[16];
219 u8 bf_data_out[9];
220 int bf_sync;
221
222 struct dsp_pipeline
223 pipeline;
224};
225
226/* functions */
227
228extern void dsp_change_volume(struct sk_buff *skb, int volume);
229
230extern struct list_head dsp_ilist;
231extern struct list_head conf_ilist;
232extern void dsp_cmx_debug(struct dsp *dsp);
233extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp);
234extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id);
235extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb);
236extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb);
237extern void dsp_cmx_send(void *arg);
238extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb);
239extern int dsp_cmx_del_conf_member(struct dsp *dsp);
240extern int dsp_cmx_del_conf(struct dsp_conf *conf);
241
242extern void dsp_dtmf_goertzel_init(struct dsp *dsp);
243extern void dsp_dtmf_hardware(struct dsp *dsp);
244extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len,
245 int fmt);
246
247extern int dsp_tone(struct dsp *dsp, int tone);
248extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len);
249extern void dsp_tone_timeout(void *arg);
250
251extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len);
252extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len);
253extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen);
254extern void dsp_bf_cleanup(struct dsp *dsp);
255
256extern int dsp_pipeline_module_init(void);
257extern void dsp_pipeline_module_exit(void);
258extern int dsp_pipeline_init(struct dsp_pipeline *pipeline);
259extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline);
260extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
261extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
262 int len);
263extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
264 int len);
265