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/drivers/isdn/mISDN/dsp.h

http://github.com/mirrors/linux
C Header | 277 lines | 175 code | 43 blank | 59 comment | 0 complexity | 73e57bb3055e86a8466cf13998c37fc7 MD5 | raw file
  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
 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;
 79
 80/* the datatype need to match jiffies datatype */
 81extern 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) */
 92struct dsp;
 93struct dsp_conf_member {
 94	struct list_head	list;
 95	struct dsp		*dsp;
 96};
 97
 98/* the list of all conferences */
 99struct 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
120struct 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 ******************/
137struct dsp_pipeline {
138	rwlock_t  lock;
139	struct list_head list;
140	int inuse;
141};
142
143/***************
144 * tones stuff *
145 ***************/
146
147struct 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
161struct 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
170struct 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
241extern void dsp_change_volume(struct sk_buff *skb, int volume);
242
243extern struct list_head dsp_ilist;
244extern struct list_head conf_ilist;
245extern void dsp_cmx_debug(struct dsp *dsp);
246extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp);
247extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id);
248extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb);
249extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb);
250extern void dsp_cmx_send(void *arg);
251extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb);
252extern int dsp_cmx_del_conf_member(struct dsp *dsp);
253extern int dsp_cmx_del_conf(struct dsp_conf *conf);
254
255extern void dsp_dtmf_goertzel_init(struct dsp *dsp);
256extern void dsp_dtmf_hardware(struct dsp *dsp);
257extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len,
258				    int fmt);
259
260extern int dsp_tone(struct dsp *dsp, int tone);
261extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len);
262extern void dsp_tone_timeout(struct timer_list *t);
263
264extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len);
265extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len);
266extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen);
267extern void dsp_bf_cleanup(struct dsp *dsp);
268
269extern int  dsp_pipeline_module_init(void);
270extern void dsp_pipeline_module_exit(void);
271extern int  dsp_pipeline_init(struct dsp_pipeline *pipeline);
272extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline);
273extern int  dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
274extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
275				    int len);
276extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
277				    int len, unsigned int txlen);