1 | /* |
2 | * Audio crossconnecting/conferrencing (hardware level). |
3 | * |
4 | * Copyright 2002 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 | /* |
12 | * The process of adding and removing parties to/from a conference: |
13 | * |
14 | * There is a chain of struct dsp_conf which has one or more members in a chain |
15 | * of struct dsp_conf_member. |
16 | * |
17 | * After a party is added, the conference is checked for hardware capability. |
18 | * Also if a party is removed, the conference is checked again. |
19 | * |
20 | * There are 3 different solutions: -1 = software, 0 = hardware-crossconnect |
21 | * 1-n = hardware-conference. The n will give the conference number. |
22 | * |
23 | * Depending on the change after removal or insertion of a party, hardware |
24 | * commands are given. |
25 | * |
26 | * The current solution is stored within the struct dsp_conf entry. |
27 | */ |
28 | |
29 | /* |
30 | * HOW THE CMX WORKS: |
31 | * |
32 | * There are 3 types of interaction: One member is alone, in this case only |
33 | * data flow from upper to lower layer is done. |
34 | * Two members will also exchange their data so they are crossconnected. |
35 | * Three or more members will be added in a conference and will hear each |
36 | * other but will not receive their own speech (echo) if not enabled. |
37 | * |
38 | * Features of CMX are: |
39 | * - Crossconnecting or even conference, if more than two members are together. |
40 | * - Force mixing of transmit data with other crossconnect/conference members. |
41 | * - Echo generation to benchmark the delay of audio processing. |
42 | * - Use hardware to minimize cpu load, disable FIFO load and minimize delay. |
43 | * - Dejittering and clock generation. |
44 | * |
45 | * There are 2 buffers: |
46 | * |
47 | * |
48 | * RX-Buffer |
49 | * R W |
50 | * | | |
51 | * ----------------+-------------+------------------- |
52 | * |
53 | * The rx-buffer is a ring buffer used to store the received data for each |
54 | * individual member. This is only the case if data needs to be dejittered |
55 | * or in case of a conference where different clocks require reclocking. |
56 | * The transmit-clock (R) will read the buffer. |
57 | * If the clock overruns the write-pointer, we will have a buffer underrun. |
58 | * If the write pointer always has a certain distance from the transmit- |
59 | * clock, we will have a delay. The delay will dynamically be increased and |
60 | * reduced. |
61 | * |
62 | * |
63 | * TX-Buffer |
64 | * R W |
65 | * | | |
66 | * -----------------+--------+----------------------- |
67 | * |
68 | * The tx-buffer is a ring buffer to queue the transmit data from user space |
69 | * until it will be mixed or sent. There are two pointers, R and W. If the write |
70 | * pointer W would reach or overrun R, the buffer would overrun. In this case |
71 | * (some) data is dropped so that it will not overrun. |
72 | * Additionally a dynamic dejittering can be enabled. this allows data from |
73 | * user space that have jitter and different clock source. |
74 | * |
75 | * |
76 | * Clock: |
77 | * |
78 | * A Clock is not required, if the data source has exactly one clock. In this |
79 | * case the data source is forwarded to the destination. |
80 | * |
81 | * A Clock is required, because the data source |
82 | * - has multiple clocks. |
83 | * - has no usable clock due to jitter or packet loss (VoIP). |
84 | * In this case the system's clock is used. The clock resolution depends on |
85 | * the jiffie resolution. |
86 | * |
87 | * If a member joins a conference: |
88 | * |
89 | * - If a member joins, its rx_buff is set to silence and change read pointer |
90 | * to transmit clock. |
91 | * |
92 | * The procedure of received data from card is explained in cmx_receive. |
93 | * The procedure of received data from user space is explained in cmx_transmit. |
94 | * The procedure of transmit data to card is cmx_send. |
95 | * |
96 | * |
97 | * Interaction with other features: |
98 | * |
99 | * DTMF: |
100 | * DTMF decoding is done before the data is crossconnected. |
101 | * |
102 | * Volume change: |
103 | * Changing rx-volume is done before the data is crossconnected. The tx-volume |
104 | * must be changed whenever data is transmitted to the card by the cmx. |
105 | * |
106 | * Tones: |
107 | * If a tone is enabled, it will be processed whenever data is transmitted to |
108 | * the card. It will replace the tx-data from the user space. |
109 | * If tones are generated by hardware, this conference member is removed for |
110 | * this time. |
111 | * |
112 | * Disable rx-data: |
113 | * If cmx is realized in hardware, rx data will be disabled if requested by |
114 | * the upper layer. If dtmf decoding is done by software and enabled, rx data |
115 | * will not be disabled but blocked to the upper layer. |
116 | * |
117 | * HFC conference engine: |
118 | * If it is possible to realize all features using hardware, hardware will be |
119 | * used if not forbidden by control command. Disabling rx-data provides |
120 | * absolutely traffic free audio processing. (except for the quick 1-frame |
121 | * upload of a tone loop, only once for a new tone) |
122 | * |
123 | */ |
124 | |
125 | /* delay.h is required for hw_lock.h */ |
126 | |
127 | #include <linux/slab.h> |
128 | #include <linux/delay.h> |
129 | #include <linux/mISDNif.h> |
130 | #include <linux/mISDNdsp.h> |
131 | #include "core.h" |
132 | #include "dsp.h" |
133 | /* |
134 | * debugging of multi party conference, |
135 | * by using conference even with two members |
136 | */ |
137 | |
138 | /* #define CMX_CONF_DEBUG */ |
139 | |
140 | /*#define CMX_DEBUG * massive read/write pointer output */ |
141 | /*#define CMX_DELAY_DEBUG * gives rx-buffer delay overview */ |
142 | /*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */ |
143 | |
144 | /* |
145 | * debug cmx memory structure |
146 | */ |
147 | void |
148 | dsp_cmx_debug(struct dsp *dsp) |
149 | { |
150 | struct dsp_conf *conf; |
151 | struct dsp_conf_member *member; |
152 | struct dsp *odsp; |
153 | |
154 | printk(KERN_DEBUG "-----Current DSP\n" ); |
155 | list_for_each_entry(odsp, &dsp_ilist, list) { |
156 | printk(KERN_DEBUG "* %s hardecho=%d softecho=%d txmix=%d" , |
157 | odsp->name, odsp->echo.hardware, odsp->echo.software, |
158 | odsp->tx_mix); |
159 | if (odsp->conf) |
160 | printk(" (Conf %d)" , odsp->conf->id); |
161 | if (dsp == odsp) |
162 | printk(" *this*" ); |
163 | printk("\n" ); |
164 | } |
165 | printk(KERN_DEBUG "-----Current Conf:\n" ); |
166 | list_for_each_entry(conf, &conf_ilist, list) { |
167 | printk(KERN_DEBUG "* Conf %d (%p)\n" , conf->id, conf); |
168 | list_for_each_entry(member, &conf->mlist, list) { |
169 | printk(KERN_DEBUG |
170 | " - member = %s (slot_tx %d, bank_tx %d, " |
171 | "slot_rx %d, bank_rx %d hfc_conf %d " |
172 | "tx_data %d rx_is_off %d)%s\n" , |
173 | member->dsp->name, member->dsp->pcm_slot_tx, |
174 | member->dsp->pcm_bank_tx, member->dsp->pcm_slot_rx, |
175 | member->dsp->pcm_bank_rx, member->dsp->hfc_conf, |
176 | member->dsp->tx_data, member->dsp->rx_is_off, |
177 | (member->dsp == dsp) ? " *this*" : "" ); |
178 | } |
179 | } |
180 | printk(KERN_DEBUG "-----end\n" ); |
181 | } |
182 | |
183 | /* |
184 | * search conference |
185 | */ |
186 | static struct dsp_conf * |
187 | dsp_cmx_search_conf(u32 id) |
188 | { |
189 | struct dsp_conf *conf; |
190 | |
191 | if (!id) { |
192 | printk(KERN_WARNING "%s: conference ID is 0.\n" , __func__); |
193 | return NULL; |
194 | } |
195 | |
196 | /* search conference */ |
197 | list_for_each_entry(conf, &conf_ilist, list) |
198 | if (conf->id == id) |
199 | return conf; |
200 | |
201 | return NULL; |
202 | } |
203 | |
204 | |
205 | /* |
206 | * add member to conference |
207 | */ |
208 | static int |
209 | dsp_cmx_add_conf_member(struct dsp *dsp, struct dsp_conf *conf) |
210 | { |
211 | struct dsp_conf_member *member; |
212 | |
213 | if (!conf || !dsp) { |
214 | printk(KERN_WARNING "%s: conf or dsp is 0.\n" , __func__); |
215 | return -EINVAL; |
216 | } |
217 | if (dsp->member) { |
218 | printk(KERN_WARNING "%s: dsp is already member in a conf.\n" , |
219 | __func__); |
220 | return -EINVAL; |
221 | } |
222 | |
223 | if (dsp->conf) { |
224 | printk(KERN_WARNING "%s: dsp is already in a conf.\n" , |
225 | __func__); |
226 | return -EINVAL; |
227 | } |
228 | |
229 | member = kzalloc(size: sizeof(struct dsp_conf_member), GFP_ATOMIC); |
230 | if (!member) { |
231 | printk(KERN_ERR "kzalloc struct dsp_conf_member failed\n" ); |
232 | return -ENOMEM; |
233 | } |
234 | member->dsp = dsp; |
235 | /* clear rx buffer */ |
236 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); |
237 | dsp->rx_init = 1; /* rx_W and rx_R will be adjusted on first frame */ |
238 | dsp->rx_W = 0; |
239 | dsp->rx_R = 0; |
240 | |
241 | list_add_tail(new: &member->list, head: &conf->mlist); |
242 | |
243 | dsp->conf = conf; |
244 | dsp->member = member; |
245 | |
246 | return 0; |
247 | } |
248 | |
249 | |
250 | /* |
251 | * del member from conference |
252 | */ |
253 | int |
254 | dsp_cmx_del_conf_member(struct dsp *dsp) |
255 | { |
256 | struct dsp_conf_member *member; |
257 | |
258 | if (!dsp) { |
259 | printk(KERN_WARNING "%s: dsp is 0.\n" , |
260 | __func__); |
261 | return -EINVAL; |
262 | } |
263 | |
264 | if (!dsp->conf) { |
265 | printk(KERN_WARNING "%s: dsp is not in a conf.\n" , |
266 | __func__); |
267 | return -EINVAL; |
268 | } |
269 | |
270 | if (list_empty(head: &dsp->conf->mlist)) { |
271 | printk(KERN_WARNING "%s: dsp has linked an empty conf.\n" , |
272 | __func__); |
273 | return -EINVAL; |
274 | } |
275 | |
276 | /* find us in conf */ |
277 | list_for_each_entry(member, &dsp->conf->mlist, list) { |
278 | if (member->dsp == dsp) { |
279 | list_del(entry: &member->list); |
280 | dsp->conf = NULL; |
281 | dsp->member = NULL; |
282 | kfree(objp: member); |
283 | return 0; |
284 | } |
285 | } |
286 | printk(KERN_WARNING |
287 | "%s: dsp is not present in its own conf_member list.\n" , |
288 | __func__); |
289 | |
290 | return -EINVAL; |
291 | } |
292 | |
293 | |
294 | /* |
295 | * new conference |
296 | */ |
297 | static struct dsp_conf |
298 | *dsp_cmx_new_conf(u32 id) |
299 | { |
300 | struct dsp_conf *conf; |
301 | |
302 | if (!id) { |
303 | printk(KERN_WARNING "%s: id is 0.\n" , |
304 | __func__); |
305 | return NULL; |
306 | } |
307 | |
308 | conf = kzalloc(size: sizeof(struct dsp_conf), GFP_ATOMIC); |
309 | if (!conf) { |
310 | printk(KERN_ERR "kzalloc struct dsp_conf failed\n" ); |
311 | return NULL; |
312 | } |
313 | INIT_LIST_HEAD(list: &conf->mlist); |
314 | conf->id = id; |
315 | |
316 | list_add_tail(new: &conf->list, head: &conf_ilist); |
317 | |
318 | return conf; |
319 | } |
320 | |
321 | |
322 | /* |
323 | * del conference |
324 | */ |
325 | int |
326 | dsp_cmx_del_conf(struct dsp_conf *conf) |
327 | { |
328 | if (!conf) { |
329 | printk(KERN_WARNING "%s: conf is null.\n" , |
330 | __func__); |
331 | return -EINVAL; |
332 | } |
333 | |
334 | if (!list_empty(head: &conf->mlist)) { |
335 | printk(KERN_WARNING "%s: conf not empty.\n" , |
336 | __func__); |
337 | return -EINVAL; |
338 | } |
339 | list_del(entry: &conf->list); |
340 | kfree(objp: conf); |
341 | |
342 | return 0; |
343 | } |
344 | |
345 | |
346 | /* |
347 | * send HW message to hfc card |
348 | */ |
349 | static void |
350 | dsp_cmx_hw_message(struct dsp *dsp, u32 message, u32 param1, u32 param2, |
351 | u32 param3, u32 param4) |
352 | { |
353 | struct mISDN_ctrl_req cq; |
354 | |
355 | memset(&cq, 0, sizeof(cq)); |
356 | cq.op = message; |
357 | cq.p1 = param1 | (param2 << 8); |
358 | cq.p2 = param3 | (param4 << 8); |
359 | if (dsp->ch.peer) |
360 | dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq); |
361 | } |
362 | |
363 | |
364 | /* |
365 | * do hardware update and set the software/hardware flag |
366 | * |
367 | * either a conference or a dsp instance can be given |
368 | * if only dsp instance is given, the instance is not associated with a conf |
369 | * and therefore removed. if a conference is given, the dsp is expected to |
370 | * be member of that conference. |
371 | */ |
372 | void |
373 | dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp) |
374 | { |
375 | struct dsp_conf_member *member, *nextm; |
376 | struct dsp *finddsp; |
377 | int memb = 0, i, ii, i1, i2; |
378 | int freeunits[8]; |
379 | u_char freeslots[256]; |
380 | int same_hfc = -1, same_pcm = -1, current_conf = -1, |
381 | all_conf = 1, tx_data = 0; |
382 | |
383 | /* dsp gets updated (no conf) */ |
384 | if (!conf) { |
385 | if (!dsp) |
386 | return; |
387 | if (dsp_debug & DEBUG_DSP_CMX) |
388 | printk(KERN_DEBUG "%s checking dsp %s\n" , |
389 | __func__, dsp->name); |
390 | one_member: |
391 | /* remove HFC conference if enabled */ |
392 | if (dsp->hfc_conf >= 0) { |
393 | if (dsp_debug & DEBUG_DSP_CMX) |
394 | printk(KERN_DEBUG |
395 | "%s removing %s from HFC conf %d " |
396 | "because dsp is split\n" , __func__, |
397 | dsp->name, dsp->hfc_conf); |
398 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_CONF_SPLIT, |
399 | param1: 0, param2: 0, param3: 0, param4: 0); |
400 | dsp->hfc_conf = -1; |
401 | } |
402 | /* process hw echo */ |
403 | if (dsp->features.pcm_banks < 1) |
404 | return; |
405 | if (!dsp->echo.software && !dsp->echo.hardware) { |
406 | /* NO ECHO: remove PCM slot if assigned */ |
407 | if (dsp->pcm_slot_tx >= 0 || dsp->pcm_slot_rx >= 0) { |
408 | if (dsp_debug & DEBUG_DSP_CMX) |
409 | printk(KERN_DEBUG "%s removing %s from" |
410 | " PCM slot %d (TX) %d (RX) because" |
411 | " dsp is split (no echo)\n" , |
412 | __func__, dsp->name, |
413 | dsp->pcm_slot_tx, dsp->pcm_slot_rx); |
414 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_DISC, |
415 | param1: 0, param2: 0, param3: 0, param4: 0); |
416 | dsp->pcm_slot_tx = -1; |
417 | dsp->pcm_bank_tx = -1; |
418 | dsp->pcm_slot_rx = -1; |
419 | dsp->pcm_bank_rx = -1; |
420 | } |
421 | return; |
422 | } |
423 | /* echo is enabled, find out if we use soft or hardware */ |
424 | dsp->echo.software = dsp->tx_data; |
425 | dsp->echo.hardware = 0; |
426 | /* ECHO: already echo */ |
427 | if (dsp->pcm_slot_tx >= 0 && dsp->pcm_slot_rx < 0 && |
428 | dsp->pcm_bank_tx == 2 && dsp->pcm_bank_rx == 2) { |
429 | dsp->echo.hardware = 1; |
430 | return; |
431 | } |
432 | /* ECHO: if slot already assigned */ |
433 | if (dsp->pcm_slot_tx >= 0) { |
434 | dsp->pcm_slot_rx = dsp->pcm_slot_tx; |
435 | dsp->pcm_bank_tx = 2; /* 2 means loop */ |
436 | dsp->pcm_bank_rx = 2; |
437 | if (dsp_debug & DEBUG_DSP_CMX) |
438 | printk(KERN_DEBUG |
439 | "%s refresh %s for echo using slot %d\n" , |
440 | __func__, dsp->name, |
441 | dsp->pcm_slot_tx); |
442 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN, |
443 | param1: dsp->pcm_slot_tx, param2: 2, param3: dsp->pcm_slot_rx, param4: 2); |
444 | dsp->echo.hardware = 1; |
445 | return; |
446 | } |
447 | /* ECHO: find slot */ |
448 | dsp->pcm_slot_tx = -1; |
449 | dsp->pcm_slot_rx = -1; |
450 | memset(freeslots, 1, sizeof(freeslots)); |
451 | list_for_each_entry(finddsp, &dsp_ilist, list) { |
452 | if (finddsp->features.pcm_id == dsp->features.pcm_id) { |
453 | if (finddsp->pcm_slot_rx >= 0 && |
454 | finddsp->pcm_slot_rx < sizeof(freeslots)) |
455 | freeslots[finddsp->pcm_slot_rx] = 0; |
456 | if (finddsp->pcm_slot_tx >= 0 && |
457 | finddsp->pcm_slot_tx < sizeof(freeslots)) |
458 | freeslots[finddsp->pcm_slot_tx] = 0; |
459 | } |
460 | } |
461 | i = 0; |
462 | ii = dsp->features.pcm_slots; |
463 | while (i < ii) { |
464 | if (freeslots[i]) |
465 | break; |
466 | i++; |
467 | } |
468 | if (i == ii) { |
469 | if (dsp_debug & DEBUG_DSP_CMX) |
470 | printk(KERN_DEBUG |
471 | "%s no slot available for echo\n" , |
472 | __func__); |
473 | /* no more slots available */ |
474 | dsp->echo.software = 1; |
475 | return; |
476 | } |
477 | /* assign free slot */ |
478 | dsp->pcm_slot_tx = i; |
479 | dsp->pcm_slot_rx = i; |
480 | dsp->pcm_bank_tx = 2; /* loop */ |
481 | dsp->pcm_bank_rx = 2; |
482 | if (dsp_debug & DEBUG_DSP_CMX) |
483 | printk(KERN_DEBUG |
484 | "%s assign echo for %s using slot %d\n" , |
485 | __func__, dsp->name, dsp->pcm_slot_tx); |
486 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN, |
487 | param1: dsp->pcm_slot_tx, param2: 2, param3: dsp->pcm_slot_rx, param4: 2); |
488 | dsp->echo.hardware = 1; |
489 | return; |
490 | } |
491 | |
492 | /* conf gets updated (all members) */ |
493 | if (dsp_debug & DEBUG_DSP_CMX) |
494 | printk(KERN_DEBUG "%s checking conference %d\n" , |
495 | __func__, conf->id); |
496 | |
497 | if (list_empty(head: &conf->mlist)) { |
498 | printk(KERN_ERR "%s: conference without members\n" , |
499 | __func__); |
500 | return; |
501 | } |
502 | member = list_entry(conf->mlist.next, struct dsp_conf_member, list); |
503 | same_hfc = member->dsp->features.hfc_id; |
504 | same_pcm = member->dsp->features.pcm_id; |
505 | /* check all members in our conference */ |
506 | list_for_each_entry(member, &conf->mlist, list) { |
507 | /* check if member uses mixing */ |
508 | if (member->dsp->tx_mix) { |
509 | if (dsp_debug & DEBUG_DSP_CMX) |
510 | printk(KERN_DEBUG |
511 | "%s dsp %s cannot form a conf, because " |
512 | "tx_mix is turned on\n" , __func__, |
513 | member->dsp->name); |
514 | conf_software: |
515 | list_for_each_entry(member, &conf->mlist, list) { |
516 | dsp = member->dsp; |
517 | /* remove HFC conference if enabled */ |
518 | if (dsp->hfc_conf >= 0) { |
519 | if (dsp_debug & DEBUG_DSP_CMX) |
520 | printk(KERN_DEBUG |
521 | "%s removing %s from HFC " |
522 | "conf %d because not " |
523 | "possible with hardware\n" , |
524 | __func__, |
525 | dsp->name, |
526 | dsp->hfc_conf); |
527 | dsp_cmx_hw_message(dsp, |
528 | MISDN_CTRL_HFC_CONF_SPLIT, |
529 | param1: 0, param2: 0, param3: 0, param4: 0); |
530 | dsp->hfc_conf = -1; |
531 | } |
532 | /* remove PCM slot if assigned */ |
533 | if (dsp->pcm_slot_tx >= 0 || |
534 | dsp->pcm_slot_rx >= 0) { |
535 | if (dsp_debug & DEBUG_DSP_CMX) |
536 | printk(KERN_DEBUG "%s removing " |
537 | "%s from PCM slot %d (TX)" |
538 | " slot %d (RX) because not" |
539 | " possible with hardware\n" , |
540 | __func__, |
541 | dsp->name, |
542 | dsp->pcm_slot_tx, |
543 | dsp->pcm_slot_rx); |
544 | dsp_cmx_hw_message(dsp, |
545 | MISDN_CTRL_HFC_PCM_DISC, |
546 | param1: 0, param2: 0, param3: 0, param4: 0); |
547 | dsp->pcm_slot_tx = -1; |
548 | dsp->pcm_bank_tx = -1; |
549 | dsp->pcm_slot_rx = -1; |
550 | dsp->pcm_bank_rx = -1; |
551 | } |
552 | } |
553 | conf->hardware = 0; |
554 | conf->software = 1; |
555 | return; |
556 | } |
557 | /* check if member has echo turned on */ |
558 | if (member->dsp->echo.hardware || member->dsp->echo.software) { |
559 | if (dsp_debug & DEBUG_DSP_CMX) |
560 | printk(KERN_DEBUG |
561 | "%s dsp %s cannot form a conf, because " |
562 | "echo is turned on\n" , __func__, |
563 | member->dsp->name); |
564 | goto conf_software; |
565 | } |
566 | /* check if member has tx_mix turned on */ |
567 | if (member->dsp->tx_mix) { |
568 | if (dsp_debug & DEBUG_DSP_CMX) |
569 | printk(KERN_DEBUG |
570 | "%s dsp %s cannot form a conf, because " |
571 | "tx_mix is turned on\n" , |
572 | __func__, member->dsp->name); |
573 | goto conf_software; |
574 | } |
575 | /* check if member changes volume at an not suppoted level */ |
576 | if (member->dsp->tx_volume) { |
577 | if (dsp_debug & DEBUG_DSP_CMX) |
578 | printk(KERN_DEBUG |
579 | "%s dsp %s cannot form a conf, because " |
580 | "tx_volume is changed\n" , |
581 | __func__, member->dsp->name); |
582 | goto conf_software; |
583 | } |
584 | if (member->dsp->rx_volume) { |
585 | if (dsp_debug & DEBUG_DSP_CMX) |
586 | printk(KERN_DEBUG |
587 | "%s dsp %s cannot form a conf, because " |
588 | "rx_volume is changed\n" , |
589 | __func__, member->dsp->name); |
590 | goto conf_software; |
591 | } |
592 | /* check if tx-data turned on */ |
593 | if (member->dsp->tx_data) { |
594 | if (dsp_debug & DEBUG_DSP_CMX) |
595 | printk(KERN_DEBUG |
596 | "%s dsp %s tx_data is turned on\n" , |
597 | __func__, member->dsp->name); |
598 | tx_data = 1; |
599 | } |
600 | /* check if pipeline exists */ |
601 | if (member->dsp->pipeline.inuse) { |
602 | if (dsp_debug & DEBUG_DSP_CMX) |
603 | printk(KERN_DEBUG |
604 | "%s dsp %s cannot form a conf, because " |
605 | "pipeline exists\n" , __func__, |
606 | member->dsp->name); |
607 | goto conf_software; |
608 | } |
609 | /* check if encryption is enabled */ |
610 | if (member->dsp->bf_enable) { |
611 | if (dsp_debug & DEBUG_DSP_CMX) |
612 | printk(KERN_DEBUG "%s dsp %s cannot form a " |
613 | "conf, because encryption is enabled\n" , |
614 | __func__, member->dsp->name); |
615 | goto conf_software; |
616 | } |
617 | /* check if member is on a card with PCM support */ |
618 | if (member->dsp->features.pcm_id < 0) { |
619 | if (dsp_debug & DEBUG_DSP_CMX) |
620 | printk(KERN_DEBUG |
621 | "%s dsp %s cannot form a conf, because " |
622 | "dsp has no PCM bus\n" , |
623 | __func__, member->dsp->name); |
624 | goto conf_software; |
625 | } |
626 | /* check if relations are on the same PCM bus */ |
627 | if (member->dsp->features.pcm_id != same_pcm) { |
628 | if (dsp_debug & DEBUG_DSP_CMX) |
629 | printk(KERN_DEBUG |
630 | "%s dsp %s cannot form a conf, because " |
631 | "dsp is on a different PCM bus than the " |
632 | "first dsp\n" , |
633 | __func__, member->dsp->name); |
634 | goto conf_software; |
635 | } |
636 | /* determine if members are on the same hfc chip */ |
637 | if (same_hfc != member->dsp->features.hfc_id) |
638 | same_hfc = -1; |
639 | /* if there are members already in a conference */ |
640 | if (current_conf < 0 && member->dsp->hfc_conf >= 0) |
641 | current_conf = member->dsp->hfc_conf; |
642 | /* if any member is not in a conference */ |
643 | if (member->dsp->hfc_conf < 0) |
644 | all_conf = 0; |
645 | |
646 | memb++; |
647 | } |
648 | |
649 | /* if no member, this is an error */ |
650 | if (memb < 1) |
651 | return; |
652 | |
653 | /* one member */ |
654 | if (memb == 1) { |
655 | if (dsp_debug & DEBUG_DSP_CMX) |
656 | printk(KERN_DEBUG |
657 | "%s conf %d cannot form a HW conference, " |
658 | "because dsp is alone\n" , __func__, conf->id); |
659 | conf->hardware = 0; |
660 | conf->software = 0; |
661 | member = list_entry(conf->mlist.next, struct dsp_conf_member, |
662 | list); |
663 | dsp = member->dsp; |
664 | goto one_member; |
665 | } |
666 | |
667 | /* |
668 | * ok, now we are sure that all members are on the same pcm. |
669 | * now we will see if we have only two members, so we can do |
670 | * crossconnections, which don't have any limitations. |
671 | */ |
672 | |
673 | /* if we have only two members */ |
674 | if (memb == 2) { |
675 | member = list_entry(conf->mlist.next, struct dsp_conf_member, |
676 | list); |
677 | nextm = list_entry(member->list.next, struct dsp_conf_member, |
678 | list); |
679 | /* remove HFC conference if enabled */ |
680 | if (member->dsp->hfc_conf >= 0) { |
681 | if (dsp_debug & DEBUG_DSP_CMX) |
682 | printk(KERN_DEBUG |
683 | "%s removing %s from HFC conf %d because " |
684 | "two parties require only a PCM slot\n" , |
685 | __func__, member->dsp->name, |
686 | member->dsp->hfc_conf); |
687 | dsp_cmx_hw_message(dsp: member->dsp, |
688 | MISDN_CTRL_HFC_CONF_SPLIT, param1: 0, param2: 0, param3: 0, param4: 0); |
689 | member->dsp->hfc_conf = -1; |
690 | } |
691 | if (nextm->dsp->hfc_conf >= 0) { |
692 | if (dsp_debug & DEBUG_DSP_CMX) |
693 | printk(KERN_DEBUG |
694 | "%s removing %s from HFC conf %d because " |
695 | "two parties require only a PCM slot\n" , |
696 | __func__, nextm->dsp->name, |
697 | nextm->dsp->hfc_conf); |
698 | dsp_cmx_hw_message(dsp: nextm->dsp, |
699 | MISDN_CTRL_HFC_CONF_SPLIT, param1: 0, param2: 0, param3: 0, param4: 0); |
700 | nextm->dsp->hfc_conf = -1; |
701 | } |
702 | /* if members have two banks (and not on the same chip) */ |
703 | if (member->dsp->features.pcm_banks > 1 && |
704 | nextm->dsp->features.pcm_banks > 1 && |
705 | member->dsp->features.hfc_id != |
706 | nextm->dsp->features.hfc_id) { |
707 | /* if both members have same slots with crossed banks */ |
708 | if (member->dsp->pcm_slot_tx >= 0 && |
709 | member->dsp->pcm_slot_rx >= 0 && |
710 | nextm->dsp->pcm_slot_tx >= 0 && |
711 | nextm->dsp->pcm_slot_rx >= 0 && |
712 | nextm->dsp->pcm_slot_tx == |
713 | member->dsp->pcm_slot_rx && |
714 | nextm->dsp->pcm_slot_rx == |
715 | member->dsp->pcm_slot_tx && |
716 | nextm->dsp->pcm_slot_tx == |
717 | member->dsp->pcm_slot_tx && |
718 | member->dsp->pcm_bank_tx != |
719 | member->dsp->pcm_bank_rx && |
720 | nextm->dsp->pcm_bank_tx != |
721 | nextm->dsp->pcm_bank_rx) { |
722 | /* all members have same slot */ |
723 | if (dsp_debug & DEBUG_DSP_CMX) |
724 | printk(KERN_DEBUG |
725 | "%s dsp %s & %s stay joined on " |
726 | "PCM slot %d bank %d (TX) bank %d " |
727 | "(RX) (on different chips)\n" , |
728 | __func__, |
729 | member->dsp->name, |
730 | nextm->dsp->name, |
731 | member->dsp->pcm_slot_tx, |
732 | member->dsp->pcm_bank_tx, |
733 | member->dsp->pcm_bank_rx); |
734 | conf->hardware = 1; |
735 | conf->software = tx_data; |
736 | return; |
737 | } |
738 | /* find a new slot */ |
739 | memset(freeslots, 1, sizeof(freeslots)); |
740 | list_for_each_entry(dsp, &dsp_ilist, list) { |
741 | if (dsp != member->dsp && |
742 | dsp != nextm->dsp && |
743 | member->dsp->features.pcm_id == |
744 | dsp->features.pcm_id) { |
745 | if (dsp->pcm_slot_rx >= 0 && |
746 | dsp->pcm_slot_rx < |
747 | sizeof(freeslots)) |
748 | freeslots[dsp->pcm_slot_rx] = 0; |
749 | if (dsp->pcm_slot_tx >= 0 && |
750 | dsp->pcm_slot_tx < |
751 | sizeof(freeslots)) |
752 | freeslots[dsp->pcm_slot_tx] = 0; |
753 | } |
754 | } |
755 | i = 0; |
756 | ii = member->dsp->features.pcm_slots; |
757 | while (i < ii) { |
758 | if (freeslots[i]) |
759 | break; |
760 | i++; |
761 | } |
762 | if (i == ii) { |
763 | if (dsp_debug & DEBUG_DSP_CMX) |
764 | printk(KERN_DEBUG |
765 | "%s no slot available for " |
766 | "%s & %s\n" , __func__, |
767 | member->dsp->name, |
768 | nextm->dsp->name); |
769 | /* no more slots available */ |
770 | goto conf_software; |
771 | } |
772 | /* assign free slot */ |
773 | member->dsp->pcm_slot_tx = i; |
774 | member->dsp->pcm_slot_rx = i; |
775 | nextm->dsp->pcm_slot_tx = i; |
776 | nextm->dsp->pcm_slot_rx = i; |
777 | member->dsp->pcm_bank_rx = 0; |
778 | member->dsp->pcm_bank_tx = 1; |
779 | nextm->dsp->pcm_bank_rx = 1; |
780 | nextm->dsp->pcm_bank_tx = 0; |
781 | if (dsp_debug & DEBUG_DSP_CMX) |
782 | printk(KERN_DEBUG |
783 | "%s adding %s & %s to new PCM slot %d " |
784 | "(TX and RX on different chips) because " |
785 | "both members have not same slots\n" , |
786 | __func__, |
787 | member->dsp->name, |
788 | nextm->dsp->name, |
789 | member->dsp->pcm_slot_tx); |
790 | dsp_cmx_hw_message(dsp: member->dsp, MISDN_CTRL_HFC_PCM_CONN, |
791 | param1: member->dsp->pcm_slot_tx, param2: member->dsp->pcm_bank_tx, |
792 | param3: member->dsp->pcm_slot_rx, param4: member->dsp->pcm_bank_rx); |
793 | dsp_cmx_hw_message(dsp: nextm->dsp, MISDN_CTRL_HFC_PCM_CONN, |
794 | param1: nextm->dsp->pcm_slot_tx, param2: nextm->dsp->pcm_bank_tx, |
795 | param3: nextm->dsp->pcm_slot_rx, param4: nextm->dsp->pcm_bank_rx); |
796 | conf->hardware = 1; |
797 | conf->software = tx_data; |
798 | return; |
799 | /* if members have one bank (or on the same chip) */ |
800 | } else { |
801 | /* if both members have different crossed slots */ |
802 | if (member->dsp->pcm_slot_tx >= 0 && |
803 | member->dsp->pcm_slot_rx >= 0 && |
804 | nextm->dsp->pcm_slot_tx >= 0 && |
805 | nextm->dsp->pcm_slot_rx >= 0 && |
806 | nextm->dsp->pcm_slot_tx == |
807 | member->dsp->pcm_slot_rx && |
808 | nextm->dsp->pcm_slot_rx == |
809 | member->dsp->pcm_slot_tx && |
810 | member->dsp->pcm_slot_tx != |
811 | member->dsp->pcm_slot_rx && |
812 | member->dsp->pcm_bank_tx == 0 && |
813 | member->dsp->pcm_bank_rx == 0 && |
814 | nextm->dsp->pcm_bank_tx == 0 && |
815 | nextm->dsp->pcm_bank_rx == 0) { |
816 | /* all members have same slot */ |
817 | if (dsp_debug & DEBUG_DSP_CMX) |
818 | printk(KERN_DEBUG |
819 | "%s dsp %s & %s stay joined on PCM " |
820 | "slot %d (TX) %d (RX) on same chip " |
821 | "or one bank PCM)\n" , __func__, |
822 | member->dsp->name, |
823 | nextm->dsp->name, |
824 | member->dsp->pcm_slot_tx, |
825 | member->dsp->pcm_slot_rx); |
826 | conf->hardware = 1; |
827 | conf->software = tx_data; |
828 | return; |
829 | } |
830 | /* find two new slot */ |
831 | memset(freeslots, 1, sizeof(freeslots)); |
832 | list_for_each_entry(dsp, &dsp_ilist, list) { |
833 | if (dsp != member->dsp && |
834 | dsp != nextm->dsp && |
835 | member->dsp->features.pcm_id == |
836 | dsp->features.pcm_id) { |
837 | if (dsp->pcm_slot_rx >= 0 && |
838 | dsp->pcm_slot_rx < |
839 | sizeof(freeslots)) |
840 | freeslots[dsp->pcm_slot_rx] = 0; |
841 | if (dsp->pcm_slot_tx >= 0 && |
842 | dsp->pcm_slot_tx < |
843 | sizeof(freeslots)) |
844 | freeslots[dsp->pcm_slot_tx] = 0; |
845 | } |
846 | } |
847 | i1 = 0; |
848 | ii = member->dsp->features.pcm_slots; |
849 | while (i1 < ii) { |
850 | if (freeslots[i1]) |
851 | break; |
852 | i1++; |
853 | } |
854 | if (i1 == ii) { |
855 | if (dsp_debug & DEBUG_DSP_CMX) |
856 | printk(KERN_DEBUG |
857 | "%s no slot available " |
858 | "for %s & %s\n" , __func__, |
859 | member->dsp->name, |
860 | nextm->dsp->name); |
861 | /* no more slots available */ |
862 | goto conf_software; |
863 | } |
864 | i2 = i1 + 1; |
865 | while (i2 < ii) { |
866 | if (freeslots[i2]) |
867 | break; |
868 | i2++; |
869 | } |
870 | if (i2 == ii) { |
871 | if (dsp_debug & DEBUG_DSP_CMX) |
872 | printk(KERN_DEBUG |
873 | "%s no slot available " |
874 | "for %s & %s\n" , |
875 | __func__, |
876 | member->dsp->name, |
877 | nextm->dsp->name); |
878 | /* no more slots available */ |
879 | goto conf_software; |
880 | } |
881 | /* assign free slots */ |
882 | member->dsp->pcm_slot_tx = i1; |
883 | member->dsp->pcm_slot_rx = i2; |
884 | nextm->dsp->pcm_slot_tx = i2; |
885 | nextm->dsp->pcm_slot_rx = i1; |
886 | member->dsp->pcm_bank_rx = 0; |
887 | member->dsp->pcm_bank_tx = 0; |
888 | nextm->dsp->pcm_bank_rx = 0; |
889 | nextm->dsp->pcm_bank_tx = 0; |
890 | if (dsp_debug & DEBUG_DSP_CMX) |
891 | printk(KERN_DEBUG |
892 | "%s adding %s & %s to new PCM slot %d " |
893 | "(TX) %d (RX) on same chip or one bank " |
894 | "PCM, because both members have not " |
895 | "crossed slots\n" , __func__, |
896 | member->dsp->name, |
897 | nextm->dsp->name, |
898 | member->dsp->pcm_slot_tx, |
899 | member->dsp->pcm_slot_rx); |
900 | dsp_cmx_hw_message(dsp: member->dsp, MISDN_CTRL_HFC_PCM_CONN, |
901 | param1: member->dsp->pcm_slot_tx, param2: member->dsp->pcm_bank_tx, |
902 | param3: member->dsp->pcm_slot_rx, param4: member->dsp->pcm_bank_rx); |
903 | dsp_cmx_hw_message(dsp: nextm->dsp, MISDN_CTRL_HFC_PCM_CONN, |
904 | param1: nextm->dsp->pcm_slot_tx, param2: nextm->dsp->pcm_bank_tx, |
905 | param3: nextm->dsp->pcm_slot_rx, param4: nextm->dsp->pcm_bank_rx); |
906 | conf->hardware = 1; |
907 | conf->software = tx_data; |
908 | return; |
909 | } |
910 | } |
911 | |
912 | /* |
913 | * if we have more than two, we may check if we have a conference |
914 | * unit available on the chip. also all members must be on the same |
915 | */ |
916 | |
917 | /* if not the same HFC chip */ |
918 | if (same_hfc < 0) { |
919 | if (dsp_debug & DEBUG_DSP_CMX) |
920 | printk(KERN_DEBUG |
921 | "%s conference %d cannot be formed, because " |
922 | "members are on different chips or not " |
923 | "on HFC chip\n" , |
924 | __func__, conf->id); |
925 | goto conf_software; |
926 | } |
927 | |
928 | /* for more than two members.. */ |
929 | |
930 | /* if all members already have the same conference */ |
931 | if (all_conf) { |
932 | conf->hardware = 1; |
933 | conf->software = tx_data; |
934 | return; |
935 | } |
936 | |
937 | /* |
938 | * if there is an existing conference, but not all members have joined |
939 | */ |
940 | if (current_conf >= 0) { |
941 | join_members: |
942 | list_for_each_entry(member, &conf->mlist, list) { |
943 | /* if no conference engine on our chip, change to |
944 | * software */ |
945 | if (!member->dsp->features.hfc_conf) |
946 | goto conf_software; |
947 | /* in case of hdlc, change to software */ |
948 | if (member->dsp->hdlc) |
949 | goto conf_software; |
950 | /* join to current conference */ |
951 | if (member->dsp->hfc_conf == current_conf) |
952 | continue; |
953 | /* get a free timeslot first */ |
954 | memset(freeslots, 1, sizeof(freeslots)); |
955 | list_for_each_entry(dsp, &dsp_ilist, list) { |
956 | /* |
957 | * not checking current member, because |
958 | * slot will be overwritten. |
959 | */ |
960 | if ( |
961 | dsp != member->dsp && |
962 | /* dsp must be on the same PCM */ |
963 | member->dsp->features.pcm_id == |
964 | dsp->features.pcm_id) { |
965 | /* dsp must be on a slot */ |
966 | if (dsp->pcm_slot_tx >= 0 && |
967 | dsp->pcm_slot_tx < |
968 | sizeof(freeslots)) |
969 | freeslots[dsp->pcm_slot_tx] = 0; |
970 | if (dsp->pcm_slot_rx >= 0 && |
971 | dsp->pcm_slot_rx < |
972 | sizeof(freeslots)) |
973 | freeslots[dsp->pcm_slot_rx] = 0; |
974 | } |
975 | } |
976 | i = 0; |
977 | ii = member->dsp->features.pcm_slots; |
978 | while (i < ii) { |
979 | if (freeslots[i]) |
980 | break; |
981 | i++; |
982 | } |
983 | if (i == ii) { |
984 | /* no more slots available */ |
985 | if (dsp_debug & DEBUG_DSP_CMX) |
986 | printk(KERN_DEBUG |
987 | "%s conference %d cannot be formed," |
988 | " because no slot free\n" , |
989 | __func__, conf->id); |
990 | goto conf_software; |
991 | } |
992 | if (dsp_debug & DEBUG_DSP_CMX) |
993 | printk(KERN_DEBUG |
994 | "%s changing dsp %s to HW conference " |
995 | "%d slot %d\n" , __func__, |
996 | member->dsp->name, current_conf, i); |
997 | /* assign free slot & set PCM & join conf */ |
998 | member->dsp->pcm_slot_tx = i; |
999 | member->dsp->pcm_slot_rx = i; |
1000 | member->dsp->pcm_bank_tx = 2; /* loop */ |
1001 | member->dsp->pcm_bank_rx = 2; |
1002 | member->dsp->hfc_conf = current_conf; |
1003 | dsp_cmx_hw_message(dsp: member->dsp, MISDN_CTRL_HFC_PCM_CONN, |
1004 | param1: i, param2: 2, param3: i, param4: 2); |
1005 | dsp_cmx_hw_message(dsp: member->dsp, |
1006 | MISDN_CTRL_HFC_CONF_JOIN, param1: current_conf, param2: 0, param3: 0, param4: 0); |
1007 | } |
1008 | conf->hardware = 1; |
1009 | conf->software = tx_data; |
1010 | return; |
1011 | } |
1012 | |
1013 | /* |
1014 | * no member is in a conference yet, so we find a free one |
1015 | */ |
1016 | memset(freeunits, 1, sizeof(freeunits)); |
1017 | list_for_each_entry(dsp, &dsp_ilist, list) { |
1018 | /* dsp must be on the same chip */ |
1019 | if (dsp->features.hfc_id == same_hfc && |
1020 | /* dsp must have joined a HW conference */ |
1021 | dsp->hfc_conf >= 0 && |
1022 | /* slot must be within range */ |
1023 | dsp->hfc_conf < 8) |
1024 | freeunits[dsp->hfc_conf] = 0; |
1025 | } |
1026 | i = 0; |
1027 | ii = 8; |
1028 | while (i < ii) { |
1029 | if (freeunits[i]) |
1030 | break; |
1031 | i++; |
1032 | } |
1033 | if (i == ii) { |
1034 | /* no more conferences available */ |
1035 | if (dsp_debug & DEBUG_DSP_CMX) |
1036 | printk(KERN_DEBUG |
1037 | "%s conference %d cannot be formed, because " |
1038 | "no conference number free\n" , |
1039 | __func__, conf->id); |
1040 | goto conf_software; |
1041 | } |
1042 | /* join all members */ |
1043 | current_conf = i; |
1044 | goto join_members; |
1045 | } |
1046 | |
1047 | |
1048 | /* |
1049 | * conf_id != 0: join or change conference |
1050 | * conf_id == 0: split from conference if not already |
1051 | */ |
1052 | int |
1053 | dsp_cmx_conf(struct dsp *dsp, u32 conf_id) |
1054 | { |
1055 | int err; |
1056 | struct dsp_conf *conf; |
1057 | struct dsp_conf_member *member; |
1058 | |
1059 | /* if conference doesn't change */ |
1060 | if (dsp->conf_id == conf_id) |
1061 | return 0; |
1062 | |
1063 | /* first remove us from current conf */ |
1064 | if (dsp->conf_id) { |
1065 | if (dsp_debug & DEBUG_DSP_CMX) |
1066 | printk(KERN_DEBUG "removing us from conference %d\n" , |
1067 | dsp->conf->id); |
1068 | /* remove us from conf */ |
1069 | conf = dsp->conf; |
1070 | err = dsp_cmx_del_conf_member(dsp); |
1071 | if (err) |
1072 | return err; |
1073 | dsp->conf_id = 0; |
1074 | |
1075 | /* update hardware */ |
1076 | dsp_cmx_hardware(NULL, dsp); |
1077 | |
1078 | /* conf now empty? */ |
1079 | if (list_empty(head: &conf->mlist)) { |
1080 | if (dsp_debug & DEBUG_DSP_CMX) |
1081 | printk(KERN_DEBUG |
1082 | "conference is empty, so we remove it.\n" ); |
1083 | err = dsp_cmx_del_conf(conf); |
1084 | if (err) |
1085 | return err; |
1086 | } else { |
1087 | /* update members left on conf */ |
1088 | dsp_cmx_hardware(conf, NULL); |
1089 | } |
1090 | } |
1091 | |
1092 | /* if split */ |
1093 | if (!conf_id) |
1094 | return 0; |
1095 | |
1096 | /* now add us to conf */ |
1097 | if (dsp_debug & DEBUG_DSP_CMX) |
1098 | printk(KERN_DEBUG "searching conference %d\n" , |
1099 | conf_id); |
1100 | conf = dsp_cmx_search_conf(id: conf_id); |
1101 | if (!conf) { |
1102 | if (dsp_debug & DEBUG_DSP_CMX) |
1103 | printk(KERN_DEBUG |
1104 | "conference doesn't exist yet, creating.\n" ); |
1105 | /* the conference doesn't exist, so we create */ |
1106 | conf = dsp_cmx_new_conf(id: conf_id); |
1107 | if (!conf) |
1108 | return -EINVAL; |
1109 | } else if (!list_empty(head: &conf->mlist)) { |
1110 | member = list_entry(conf->mlist.next, struct dsp_conf_member, |
1111 | list); |
1112 | if (dsp->hdlc && !member->dsp->hdlc) { |
1113 | if (dsp_debug & DEBUG_DSP_CMX) |
1114 | printk(KERN_DEBUG |
1115 | "cannot join transparent conference.\n" ); |
1116 | return -EINVAL; |
1117 | } |
1118 | if (!dsp->hdlc && member->dsp->hdlc) { |
1119 | if (dsp_debug & DEBUG_DSP_CMX) |
1120 | printk(KERN_DEBUG |
1121 | "cannot join hdlc conference.\n" ); |
1122 | return -EINVAL; |
1123 | } |
1124 | } |
1125 | /* add conference member */ |
1126 | err = dsp_cmx_add_conf_member(dsp, conf); |
1127 | if (err) |
1128 | return err; |
1129 | dsp->conf_id = conf_id; |
1130 | |
1131 | /* if we are alone, we do nothing! */ |
1132 | if (list_empty(head: &conf->mlist)) { |
1133 | if (dsp_debug & DEBUG_DSP_CMX) |
1134 | printk(KERN_DEBUG |
1135 | "we are alone in this conference, so exit.\n" ); |
1136 | /* update hardware */ |
1137 | dsp_cmx_hardware(NULL, dsp); |
1138 | return 0; |
1139 | } |
1140 | |
1141 | /* update members on conf */ |
1142 | dsp_cmx_hardware(conf, NULL); |
1143 | |
1144 | return 0; |
1145 | } |
1146 | |
1147 | #ifdef CMX_DELAY_DEBUG |
1148 | int delaycount; |
1149 | static void |
1150 | showdelay(struct dsp *dsp, int samples, int delay) |
1151 | { |
1152 | char bar[] = "--------------------------------------------------|" ; |
1153 | int sdelay; |
1154 | |
1155 | delaycount += samples; |
1156 | if (delaycount < 8000) |
1157 | return; |
1158 | delaycount = 0; |
1159 | |
1160 | sdelay = delay * 50 / (dsp_poll << 2); |
1161 | |
1162 | printk(KERN_DEBUG "DELAY (%s) %3d >%s\n" , dsp->name, delay, |
1163 | sdelay > 50 ? "..." : bar + 50 - sdelay); |
1164 | } |
1165 | #endif |
1166 | |
1167 | /* |
1168 | * audio data is received from card |
1169 | */ |
1170 | void |
1171 | dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb) |
1172 | { |
1173 | u8 *d, *p; |
1174 | int len = skb->len; |
1175 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
1176 | int w, i, ii; |
1177 | |
1178 | /* check if we have sompen */ |
1179 | if (len < 1) |
1180 | return; |
1181 | |
1182 | /* half of the buffer should be larger than maximum packet size */ |
1183 | if (len >= CMX_BUFF_HALF) { |
1184 | printk(KERN_ERR |
1185 | "%s line %d: packet from card is too large (%d bytes). " |
1186 | "please make card send smaller packets OR increase " |
1187 | "CMX_BUFF_SIZE\n" , __FILE__, __LINE__, len); |
1188 | return; |
1189 | } |
1190 | |
1191 | /* |
1192 | * initialize pointers if not already - |
1193 | * also add delay if requested by PH_SIGNAL |
1194 | */ |
1195 | if (dsp->rx_init) { |
1196 | dsp->rx_init = 0; |
1197 | if (dsp->features.unordered) { |
1198 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); |
1199 | if (dsp->cmx_delay) |
1200 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) |
1201 | & CMX_BUFF_MASK; |
1202 | else |
1203 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) |
1204 | & CMX_BUFF_MASK; |
1205 | } else { |
1206 | dsp->rx_R = 0; |
1207 | if (dsp->cmx_delay) |
1208 | dsp->rx_W = dsp->cmx_delay; |
1209 | else |
1210 | dsp->rx_W = dsp_poll >> 1; |
1211 | } |
1212 | } |
1213 | /* if frame contains time code, write directly */ |
1214 | if (dsp->features.unordered) { |
1215 | dsp->rx_W = (hh->id & CMX_BUFF_MASK); |
1216 | /* printk(KERN_DEBUG "%s %08x\n", dsp->name, hh->id); */ |
1217 | } |
1218 | /* |
1219 | * if we underrun (or maybe overrun), |
1220 | * we set our new read pointer, and write silence to buffer |
1221 | */ |
1222 | if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) { |
1223 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1224 | printk(KERN_DEBUG |
1225 | "cmx_receive(dsp=%lx): UNDERRUN (or overrun the " |
1226 | "maximum delay), adjusting read pointer! " |
1227 | "(inst %s)\n" , (u_long)dsp, dsp->name); |
1228 | /* flush rx buffer and set delay to dsp_poll / 2 */ |
1229 | if (dsp->features.unordered) { |
1230 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); |
1231 | if (dsp->cmx_delay) |
1232 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) |
1233 | & CMX_BUFF_MASK; |
1234 | else |
1235 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) |
1236 | & CMX_BUFF_MASK; |
1237 | } else { |
1238 | dsp->rx_R = 0; |
1239 | if (dsp->cmx_delay) |
1240 | dsp->rx_W = dsp->cmx_delay; |
1241 | else |
1242 | dsp->rx_W = dsp_poll >> 1; |
1243 | } |
1244 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); |
1245 | } |
1246 | /* if we have reached double delay, jump back to middle */ |
1247 | if (dsp->cmx_delay) |
1248 | if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >= |
1249 | (dsp->cmx_delay << 1)) { |
1250 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1251 | printk(KERN_DEBUG |
1252 | "cmx_receive(dsp=%lx): OVERRUN (because " |
1253 | "twice the delay is reached), adjusting " |
1254 | "read pointer! (inst %s)\n" , |
1255 | (u_long)dsp, dsp->name); |
1256 | /* flush buffer */ |
1257 | if (dsp->features.unordered) { |
1258 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); |
1259 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) |
1260 | & CMX_BUFF_MASK; |
1261 | } else { |
1262 | dsp->rx_R = 0; |
1263 | dsp->rx_W = dsp->cmx_delay; |
1264 | } |
1265 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); |
1266 | } |
1267 | |
1268 | /* show where to write */ |
1269 | #ifdef CMX_DEBUG |
1270 | printk(KERN_DEBUG |
1271 | "cmx_receive(dsp=%lx): rx_R(dsp)=%05x rx_W(dsp)=%05x len=%d %s\n" , |
1272 | (u_long)dsp, dsp->rx_R, dsp->rx_W, len, dsp->name); |
1273 | #endif |
1274 | |
1275 | /* write data into rx_buffer */ |
1276 | p = skb->data; |
1277 | d = dsp->rx_buff; |
1278 | w = dsp->rx_W; |
1279 | i = 0; |
1280 | ii = len; |
1281 | while (i < ii) { |
1282 | d[w++ & CMX_BUFF_MASK] = *p++; |
1283 | i++; |
1284 | } |
1285 | |
1286 | /* increase write-pointer */ |
1287 | dsp->rx_W = ((dsp->rx_W + len) & CMX_BUFF_MASK); |
1288 | #ifdef CMX_DELAY_DEBUG |
1289 | showdelay(dsp, len, (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK); |
1290 | #endif |
1291 | } |
1292 | |
1293 | |
1294 | /* |
1295 | * send (mixed) audio data to card and control jitter |
1296 | */ |
1297 | static void |
1298 | dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members) |
1299 | { |
1300 | struct dsp_conf *conf = dsp->conf; |
1301 | struct dsp *member, *other; |
1302 | register s32 sample; |
1303 | u8 *d, *p, *q, *o_q; |
1304 | struct sk_buff *nskb, *txskb; |
1305 | int r, rr, t, tt, o_r, o_rr; |
1306 | int preload = 0; |
1307 | struct mISDNhead *hh, *thh; |
1308 | int tx_data_only = 0; |
1309 | |
1310 | /* don't process if: */ |
1311 | if (!dsp->b_active) { /* if not active */ |
1312 | dsp->last_tx = 0; |
1313 | return; |
1314 | } |
1315 | if (((dsp->conf && dsp->conf->hardware) || /* hardware conf */ |
1316 | dsp->echo.hardware) && /* OR hardware echo */ |
1317 | dsp->tx_R == dsp->tx_W && /* AND no tx-data */ |
1318 | !(dsp->tone.tone && dsp->tone.software)) { /* AND not soft tones */ |
1319 | if (!dsp->tx_data) { /* no tx_data for user space required */ |
1320 | dsp->last_tx = 0; |
1321 | return; |
1322 | } |
1323 | if (dsp->conf && dsp->conf->software && dsp->conf->hardware) |
1324 | tx_data_only = 1; |
1325 | if (dsp->echo.software && dsp->echo.hardware) |
1326 | tx_data_only = 1; |
1327 | } |
1328 | |
1329 | #ifdef CMX_DEBUG |
1330 | printk(KERN_DEBUG |
1331 | "SEND members=%d dsp=%s, conf=%p, rx_R=%05x rx_W=%05x\n" , |
1332 | members, dsp->name, conf, dsp->rx_R, dsp->rx_W); |
1333 | #endif |
1334 | |
1335 | /* preload if we have delay set */ |
1336 | if (dsp->cmx_delay && !dsp->last_tx) { |
1337 | preload = len; |
1338 | if (preload < 128) |
1339 | preload = 128; |
1340 | } |
1341 | |
1342 | /* PREPARE RESULT */ |
1343 | nskb = mI_alloc_skb(len: len + preload, GFP_ATOMIC); |
1344 | if (!nskb) { |
1345 | printk(KERN_ERR |
1346 | "FATAL ERROR in mISDN_dsp.o: cannot alloc %d bytes\n" , |
1347 | len + preload); |
1348 | return; |
1349 | } |
1350 | hh = mISDN_HEAD_P(nskb); |
1351 | hh->prim = PH_DATA_REQ; |
1352 | hh->id = 0; |
1353 | dsp->last_tx = 1; |
1354 | |
1355 | /* set pointers, indexes and stuff */ |
1356 | member = dsp; |
1357 | p = dsp->tx_buff; /* transmit data */ |
1358 | q = dsp->rx_buff; /* received data */ |
1359 | d = skb_put(skb: nskb, len: preload + len); /* result */ |
1360 | t = dsp->tx_R; /* tx-pointers */ |
1361 | tt = dsp->tx_W; |
1362 | r = dsp->rx_R; /* rx-pointers */ |
1363 | rr = (r + len) & CMX_BUFF_MASK; |
1364 | |
1365 | /* preload with silence, if required */ |
1366 | if (preload) { |
1367 | memset(d, dsp_silence, preload); |
1368 | d += preload; |
1369 | } |
1370 | |
1371 | /* PROCESS TONES/TX-DATA ONLY */ |
1372 | if (dsp->tone.tone && dsp->tone.software) { |
1373 | /* -> copy tone */ |
1374 | dsp_tone_copy(dsp, data: d, len); |
1375 | dsp->tx_R = 0; /* clear tx buffer */ |
1376 | dsp->tx_W = 0; |
1377 | goto send_packet; |
1378 | } |
1379 | /* if we have tx-data but do not use mixing */ |
1380 | if (!dsp->tx_mix && t != tt) { |
1381 | /* -> send tx-data and continue when not enough */ |
1382 | #ifdef CMX_TX_DEBUG |
1383 | sprintf(debugbuf, "TX sending (%04x-%04x)%p: " , t, tt, p); |
1384 | #endif |
1385 | while (r != rr && t != tt) { |
1386 | #ifdef CMX_TX_DEBUG |
1387 | if (strlen(debugbuf) < 48) |
1388 | sprintf(debugbuf + strlen(debugbuf), " %02x" , |
1389 | p[t]); |
1390 | #endif |
1391 | *d++ = p[t]; /* write tx_buff */ |
1392 | t = (t + 1) & CMX_BUFF_MASK; |
1393 | r = (r + 1) & CMX_BUFF_MASK; |
1394 | } |
1395 | if (r == rr) { |
1396 | dsp->tx_R = t; |
1397 | #ifdef CMX_TX_DEBUG |
1398 | printk(KERN_DEBUG "%s\n" , debugbuf); |
1399 | #endif |
1400 | goto send_packet; |
1401 | } |
1402 | } |
1403 | #ifdef CMX_TX_DEBUG |
1404 | printk(KERN_DEBUG "%s\n" , debugbuf); |
1405 | #endif |
1406 | |
1407 | /* PROCESS DATA (one member / no conf) */ |
1408 | if (!conf || members <= 1) { |
1409 | /* -> if echo is NOT enabled */ |
1410 | if (!dsp->echo.software) { |
1411 | /* -> send tx-data if available or use 0-volume */ |
1412 | while (r != rr && t != tt) { |
1413 | *d++ = p[t]; /* write tx_buff */ |
1414 | t = (t + 1) & CMX_BUFF_MASK; |
1415 | r = (r + 1) & CMX_BUFF_MASK; |
1416 | } |
1417 | if (r != rr) { |
1418 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1419 | printk(KERN_DEBUG "%s: RX empty\n" , |
1420 | __func__); |
1421 | memset(d, dsp_silence, (rr - r) & CMX_BUFF_MASK); |
1422 | } |
1423 | /* -> if echo is enabled */ |
1424 | } else { |
1425 | /* |
1426 | * -> mix tx-data with echo if available, |
1427 | * or use echo only |
1428 | */ |
1429 | while (r != rr && t != tt) { |
1430 | *d++ = dsp_audio_mix_law[(p[t] << 8) | q[r]]; |
1431 | t = (t + 1) & CMX_BUFF_MASK; |
1432 | r = (r + 1) & CMX_BUFF_MASK; |
1433 | } |
1434 | while (r != rr) { |
1435 | *d++ = q[r]; /* echo */ |
1436 | r = (r + 1) & CMX_BUFF_MASK; |
1437 | } |
1438 | } |
1439 | dsp->tx_R = t; |
1440 | goto send_packet; |
1441 | } |
1442 | /* PROCESS DATA (two members) */ |
1443 | #ifdef CMX_CONF_DEBUG |
1444 | if (0) { |
1445 | #else |
1446 | if (members == 2) { |
1447 | #endif |
1448 | /* "other" becomes other party */ |
1449 | other = (list_entry(conf->mlist.next, |
1450 | struct dsp_conf_member, list))->dsp; |
1451 | if (other == member) |
1452 | other = (list_entry(conf->mlist.prev, |
1453 | struct dsp_conf_member, list))->dsp; |
1454 | o_q = other->rx_buff; /* received data */ |
1455 | o_rr = (other->rx_R + len) & CMX_BUFF_MASK; |
1456 | /* end of rx-pointer */ |
1457 | o_r = (o_rr - rr + r) & CMX_BUFF_MASK; |
1458 | /* start rx-pointer at current read position*/ |
1459 | /* -> if echo is NOT enabled */ |
1460 | if (!dsp->echo.software) { |
1461 | /* |
1462 | * -> copy other member's rx-data, |
1463 | * if tx-data is available, mix |
1464 | */ |
1465 | while (o_r != o_rr && t != tt) { |
1466 | *d++ = dsp_audio_mix_law[(p[t] << 8) | o_q[o_r]]; |
1467 | t = (t + 1) & CMX_BUFF_MASK; |
1468 | o_r = (o_r + 1) & CMX_BUFF_MASK; |
1469 | } |
1470 | while (o_r != o_rr) { |
1471 | *d++ = o_q[o_r]; |
1472 | o_r = (o_r + 1) & CMX_BUFF_MASK; |
1473 | } |
1474 | /* -> if echo is enabled */ |
1475 | } else { |
1476 | /* |
1477 | * -> mix other member's rx-data with echo, |
1478 | * if tx-data is available, mix |
1479 | */ |
1480 | while (r != rr && t != tt) { |
1481 | sample = dsp_audio_law_to_s32[p[t]] + |
1482 | dsp_audio_law_to_s32[q[r]] + |
1483 | dsp_audio_law_to_s32[o_q[o_r]]; |
1484 | if (sample < -32768) |
1485 | sample = -32768; |
1486 | else if (sample > 32767) |
1487 | sample = 32767; |
1488 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; |
1489 | /* tx-data + rx_data + echo */ |
1490 | t = (t + 1) & CMX_BUFF_MASK; |
1491 | r = (r + 1) & CMX_BUFF_MASK; |
1492 | o_r = (o_r + 1) & CMX_BUFF_MASK; |
1493 | } |
1494 | while (r != rr) { |
1495 | *d++ = dsp_audio_mix_law[(q[r] << 8) | o_q[o_r]]; |
1496 | r = (r + 1) & CMX_BUFF_MASK; |
1497 | o_r = (o_r + 1) & CMX_BUFF_MASK; |
1498 | } |
1499 | } |
1500 | dsp->tx_R = t; |
1501 | goto send_packet; |
1502 | } |
1503 | /* PROCESS DATA (three or more members) */ |
1504 | /* -> if echo is NOT enabled */ |
1505 | if (!dsp->echo.software) { |
1506 | /* |
1507 | * -> subtract rx-data from conf-data, |
1508 | * if tx-data is available, mix |
1509 | */ |
1510 | while (r != rr && t != tt) { |
1511 | sample = dsp_audio_law_to_s32[p[t]] + *c++ - |
1512 | dsp_audio_law_to_s32[q[r]]; |
1513 | if (sample < -32768) |
1514 | sample = -32768; |
1515 | else if (sample > 32767) |
1516 | sample = 32767; |
1517 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; |
1518 | /* conf-rx+tx */ |
1519 | r = (r + 1) & CMX_BUFF_MASK; |
1520 | t = (t + 1) & CMX_BUFF_MASK; |
1521 | } |
1522 | while (r != rr) { |
1523 | sample = *c++ - dsp_audio_law_to_s32[q[r]]; |
1524 | if (sample < -32768) |
1525 | sample = -32768; |
1526 | else if (sample > 32767) |
1527 | sample = 32767; |
1528 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; |
1529 | /* conf-rx */ |
1530 | r = (r + 1) & CMX_BUFF_MASK; |
1531 | } |
1532 | /* -> if echo is enabled */ |
1533 | } else { |
1534 | /* |
1535 | * -> encode conf-data, if tx-data |
1536 | * is available, mix |
1537 | */ |
1538 | while (r != rr && t != tt) { |
1539 | sample = dsp_audio_law_to_s32[p[t]] + *c++; |
1540 | if (sample < -32768) |
1541 | sample = -32768; |
1542 | else if (sample > 32767) |
1543 | sample = 32767; |
1544 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; |
1545 | /* conf(echo)+tx */ |
1546 | t = (t + 1) & CMX_BUFF_MASK; |
1547 | r = (r + 1) & CMX_BUFF_MASK; |
1548 | } |
1549 | while (r != rr) { |
1550 | sample = *c++; |
1551 | if (sample < -32768) |
1552 | sample = -32768; |
1553 | else if (sample > 32767) |
1554 | sample = 32767; |
1555 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; |
1556 | /* conf(echo) */ |
1557 | r = (r + 1) & CMX_BUFF_MASK; |
1558 | } |
1559 | } |
1560 | dsp->tx_R = t; |
1561 | goto send_packet; |
1562 | |
1563 | send_packet: |
1564 | /* |
1565 | * send tx-data if enabled - don't filter, |
1566 | * because we want what we send, not what we filtered |
1567 | */ |
1568 | if (dsp->tx_data) { |
1569 | if (tx_data_only) { |
1570 | hh->prim = DL_DATA_REQ; |
1571 | hh->id = 0; |
1572 | /* queue and trigger */ |
1573 | skb_queue_tail(list: &dsp->sendq, newsk: nskb); |
1574 | schedule_work(work: &dsp->workq); |
1575 | /* exit because only tx_data is used */ |
1576 | return; |
1577 | } else { |
1578 | txskb = mI_alloc_skb(len, GFP_ATOMIC); |
1579 | if (!txskb) { |
1580 | printk(KERN_ERR |
1581 | "FATAL ERROR in mISDN_dsp.o: " |
1582 | "cannot alloc %d bytes\n" , len); |
1583 | } else { |
1584 | thh = mISDN_HEAD_P(txskb); |
1585 | thh->prim = DL_DATA_REQ; |
1586 | thh->id = 0; |
1587 | skb_put_data(skb: txskb, data: nskb->data + preload, len); |
1588 | /* queue (trigger later) */ |
1589 | skb_queue_tail(list: &dsp->sendq, newsk: txskb); |
1590 | } |
1591 | } |
1592 | } |
1593 | |
1594 | /* send data only to card, if we don't just calculated tx_data */ |
1595 | /* adjust volume */ |
1596 | if (dsp->tx_volume) |
1597 | dsp_change_volume(skb: nskb, volume: dsp->tx_volume); |
1598 | /* pipeline */ |
1599 | if (dsp->pipeline.inuse) |
1600 | dsp_pipeline_process_tx(pipeline: &dsp->pipeline, data: nskb->data, |
1601 | len: nskb->len); |
1602 | /* crypt */ |
1603 | if (dsp->bf_enable) |
1604 | dsp_bf_encrypt(dsp, data: nskb->data, len: nskb->len); |
1605 | /* queue and trigger */ |
1606 | skb_queue_tail(list: &dsp->sendq, newsk: nskb); |
1607 | schedule_work(work: &dsp->workq); |
1608 | } |
1609 | |
1610 | static u32 jittercount; /* counter for jitter check */ |
1611 | struct timer_list dsp_spl_tl; |
1612 | unsigned long dsp_spl_jiffies; /* calculate the next time to fire */ |
1613 | static u16 dsp_count; /* last sample count */ |
1614 | static int dsp_count_valid; /* if we have last sample count */ |
1615 | |
1616 | void |
1617 | dsp_cmx_send(struct timer_list *arg) |
1618 | { |
1619 | struct dsp_conf *conf; |
1620 | struct dsp_conf_member *member; |
1621 | struct dsp *dsp; |
1622 | int mustmix, members; |
1623 | static s32 mixbuffer[MAX_POLL + 100]; |
1624 | s32 *c; |
1625 | u8 *p, *q; |
1626 | int r, rr; |
1627 | int jittercheck = 0, delay, i; |
1628 | u_long flags; |
1629 | u16 length, count; |
1630 | |
1631 | /* lock */ |
1632 | spin_lock_irqsave(&dsp_lock, flags); |
1633 | |
1634 | if (!dsp_count_valid) { |
1635 | dsp_count = mISDN_clock_get(); |
1636 | length = dsp_poll; |
1637 | dsp_count_valid = 1; |
1638 | } else { |
1639 | count = mISDN_clock_get(); |
1640 | length = count - dsp_count; |
1641 | dsp_count = count; |
1642 | } |
1643 | if (length > MAX_POLL + 100) |
1644 | length = MAX_POLL + 100; |
1645 | /* printk(KERN_DEBUG "len=%d dsp_count=0x%x\n", length, dsp_count); */ |
1646 | |
1647 | /* |
1648 | * check if jitter needs to be checked (this is every second) |
1649 | */ |
1650 | jittercount += length; |
1651 | if (jittercount >= 8000) { |
1652 | jittercount -= 8000; |
1653 | jittercheck = 1; |
1654 | } |
1655 | |
1656 | /* loop all members that do not require conference mixing */ |
1657 | list_for_each_entry(dsp, &dsp_ilist, list) { |
1658 | if (dsp->hdlc) |
1659 | continue; |
1660 | conf = dsp->conf; |
1661 | mustmix = 0; |
1662 | members = 0; |
1663 | if (conf) { |
1664 | members = list_count_nodes(head: &conf->mlist); |
1665 | #ifdef CMX_CONF_DEBUG |
1666 | if (conf->software && members > 1) |
1667 | #else |
1668 | if (conf->software && members > 2) |
1669 | #endif |
1670 | mustmix = 1; |
1671 | } |
1672 | |
1673 | /* transmission required */ |
1674 | if (!mustmix) { |
1675 | dsp_cmx_send_member(dsp, len: length, c: mixbuffer, members); |
1676 | |
1677 | /* |
1678 | * unused mixbuffer is given to prevent a |
1679 | * potential null-pointer-bug |
1680 | */ |
1681 | } |
1682 | } |
1683 | |
1684 | /* loop all members that require conference mixing */ |
1685 | list_for_each_entry(conf, &conf_ilist, list) { |
1686 | /* count members and check hardware */ |
1687 | members = list_count_nodes(head: &conf->mlist); |
1688 | #ifdef CMX_CONF_DEBUG |
1689 | if (conf->software && members > 1) { |
1690 | #else |
1691 | if (conf->software && members > 2) { |
1692 | #endif |
1693 | /* check for hdlc conf */ |
1694 | member = list_entry(conf->mlist.next, |
1695 | struct dsp_conf_member, list); |
1696 | if (member->dsp->hdlc) |
1697 | continue; |
1698 | /* mix all data */ |
1699 | memset(mixbuffer, 0, length * sizeof(s32)); |
1700 | list_for_each_entry(member, &conf->mlist, list) { |
1701 | dsp = member->dsp; |
1702 | /* get range of data to mix */ |
1703 | c = mixbuffer; |
1704 | q = dsp->rx_buff; |
1705 | r = dsp->rx_R; |
1706 | rr = (r + length) & CMX_BUFF_MASK; |
1707 | /* add member's data */ |
1708 | while (r != rr) { |
1709 | *c++ += dsp_audio_law_to_s32[q[r]]; |
1710 | r = (r + 1) & CMX_BUFF_MASK; |
1711 | } |
1712 | } |
1713 | |
1714 | /* process each member */ |
1715 | list_for_each_entry(member, &conf->mlist, list) { |
1716 | /* transmission */ |
1717 | dsp_cmx_send_member(dsp: member->dsp, len: length, |
1718 | c: mixbuffer, members); |
1719 | } |
1720 | } |
1721 | } |
1722 | |
1723 | /* delete rx-data, increment buffers, change pointers */ |
1724 | list_for_each_entry(dsp, &dsp_ilist, list) { |
1725 | if (dsp->hdlc) |
1726 | continue; |
1727 | p = dsp->rx_buff; |
1728 | q = dsp->tx_buff; |
1729 | r = dsp->rx_R; |
1730 | /* move receive pointer when receiving */ |
1731 | if (!dsp->rx_is_off) { |
1732 | rr = (r + length) & CMX_BUFF_MASK; |
1733 | /* delete rx-data */ |
1734 | while (r != rr) { |
1735 | p[r] = dsp_silence; |
1736 | r = (r + 1) & CMX_BUFF_MASK; |
1737 | } |
1738 | /* increment rx-buffer pointer */ |
1739 | dsp->rx_R = r; /* write incremented read pointer */ |
1740 | } |
1741 | |
1742 | /* check current rx_delay */ |
1743 | delay = (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK; |
1744 | if (delay >= CMX_BUFF_HALF) |
1745 | delay = 0; /* will be the delay before next write */ |
1746 | /* check for lower delay */ |
1747 | if (delay < dsp->rx_delay[0]) |
1748 | dsp->rx_delay[0] = delay; |
1749 | /* check current tx_delay */ |
1750 | delay = (dsp->tx_W-dsp->tx_R) & CMX_BUFF_MASK; |
1751 | if (delay >= CMX_BUFF_HALF) |
1752 | delay = 0; /* will be the delay before next write */ |
1753 | /* check for lower delay */ |
1754 | if (delay < dsp->tx_delay[0]) |
1755 | dsp->tx_delay[0] = delay; |
1756 | if (jittercheck) { |
1757 | /* find the lowest of all rx_delays */ |
1758 | delay = dsp->rx_delay[0]; |
1759 | i = 1; |
1760 | while (i < MAX_SECONDS_JITTER_CHECK) { |
1761 | if (delay > dsp->rx_delay[i]) |
1762 | delay = dsp->rx_delay[i]; |
1763 | i++; |
1764 | } |
1765 | /* |
1766 | * remove rx_delay only if we have delay AND we |
1767 | * have not preset cmx_delay AND |
1768 | * the delay is greater dsp_poll |
1769 | */ |
1770 | if (delay > dsp_poll && !dsp->cmx_delay) { |
1771 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1772 | printk(KERN_DEBUG |
1773 | "%s lowest rx_delay of %d bytes for" |
1774 | " dsp %s are now removed.\n" , |
1775 | __func__, delay, |
1776 | dsp->name); |
1777 | r = dsp->rx_R; |
1778 | rr = (r + delay - (dsp_poll >> 1)) |
1779 | & CMX_BUFF_MASK; |
1780 | /* delete rx-data */ |
1781 | while (r != rr) { |
1782 | p[r] = dsp_silence; |
1783 | r = (r + 1) & CMX_BUFF_MASK; |
1784 | } |
1785 | /* increment rx-buffer pointer */ |
1786 | dsp->rx_R = r; |
1787 | /* write incremented read pointer */ |
1788 | } |
1789 | /* find the lowest of all tx_delays */ |
1790 | delay = dsp->tx_delay[0]; |
1791 | i = 1; |
1792 | while (i < MAX_SECONDS_JITTER_CHECK) { |
1793 | if (delay > dsp->tx_delay[i]) |
1794 | delay = dsp->tx_delay[i]; |
1795 | i++; |
1796 | } |
1797 | /* |
1798 | * remove delay only if we have delay AND we |
1799 | * have enabled tx_dejitter |
1800 | */ |
1801 | if (delay > dsp_poll && dsp->tx_dejitter) { |
1802 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1803 | printk(KERN_DEBUG |
1804 | "%s lowest tx_delay of %d bytes for" |
1805 | " dsp %s are now removed.\n" , |
1806 | __func__, delay, |
1807 | dsp->name); |
1808 | r = dsp->tx_R; |
1809 | rr = (r + delay - (dsp_poll >> 1)) |
1810 | & CMX_BUFF_MASK; |
1811 | /* delete tx-data */ |
1812 | while (r != rr) { |
1813 | q[r] = dsp_silence; |
1814 | r = (r + 1) & CMX_BUFF_MASK; |
1815 | } |
1816 | /* increment rx-buffer pointer */ |
1817 | dsp->tx_R = r; |
1818 | /* write incremented read pointer */ |
1819 | } |
1820 | /* scroll up delays */ |
1821 | i = MAX_SECONDS_JITTER_CHECK - 1; |
1822 | while (i) { |
1823 | dsp->rx_delay[i] = dsp->rx_delay[i - 1]; |
1824 | dsp->tx_delay[i] = dsp->tx_delay[i - 1]; |
1825 | i--; |
1826 | } |
1827 | dsp->tx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ |
1828 | dsp->rx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ |
1829 | } |
1830 | } |
1831 | |
1832 | /* if next event would be in the past ... */ |
1833 | if ((s32)(dsp_spl_jiffies + dsp_tics-jiffies) <= 0) |
1834 | dsp_spl_jiffies = jiffies + 1; |
1835 | else |
1836 | dsp_spl_jiffies += dsp_tics; |
1837 | |
1838 | dsp_spl_tl.expires = dsp_spl_jiffies; |
1839 | add_timer(timer: &dsp_spl_tl); |
1840 | |
1841 | /* unlock */ |
1842 | spin_unlock_irqrestore(lock: &dsp_lock, flags); |
1843 | } |
1844 | |
1845 | /* |
1846 | * audio data is transmitted from upper layer to the dsp |
1847 | */ |
1848 | void |
1849 | dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb) |
1850 | { |
1851 | u_int w, ww; |
1852 | u8 *d, *p; |
1853 | int space; /* todo: , l = skb->len; */ |
1854 | #ifdef CMX_TX_DEBUG |
1855 | char debugbuf[256] = "" ; |
1856 | #endif |
1857 | |
1858 | /* check if there is enough space, and then copy */ |
1859 | w = dsp->tx_W; |
1860 | ww = dsp->tx_R; |
1861 | p = dsp->tx_buff; |
1862 | d = skb->data; |
1863 | space = (ww - w - 1) & CMX_BUFF_MASK; |
1864 | /* write-pointer should not overrun nor reach read pointer */ |
1865 | if (space < skb->len) { |
1866 | /* write to the space we have left */ |
1867 | ww = (ww - 1) & CMX_BUFF_MASK; /* end one byte prior tx_R */ |
1868 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1869 | printk(KERN_DEBUG "%s: TX overflow space=%d skb->len=" |
1870 | "%d, w=0x%04x, ww=0x%04x\n" , __func__, space, |
1871 | skb->len, w, ww); |
1872 | } else |
1873 | /* write until all byte are copied */ |
1874 | ww = (w + skb->len) & CMX_BUFF_MASK; |
1875 | dsp->tx_W = ww; |
1876 | /* show current buffer */ |
1877 | #ifdef CMX_DEBUG |
1878 | printk(KERN_DEBUG |
1879 | "cmx_transmit(dsp=%lx) %d bytes to 0x%x-0x%x. %s\n" , |
1880 | (u_long)dsp, (ww - w) & CMX_BUFF_MASK, w, ww, dsp->name); |
1881 | #endif |
1882 | |
1883 | /* copy transmit data to tx-buffer */ |
1884 | #ifdef CMX_TX_DEBUG |
1885 | sprintf(debugbuf, "TX getting (%04x-%04x)%p: " , w, ww, p); |
1886 | #endif |
1887 | while (w != ww) { |
1888 | #ifdef CMX_TX_DEBUG |
1889 | if (strlen(debugbuf) < 48) |
1890 | sprintf(debugbuf + strlen(debugbuf), " %02x" , *d); |
1891 | #endif |
1892 | p[w] = *d++; |
1893 | w = (w + 1) & CMX_BUFF_MASK; |
1894 | } |
1895 | #ifdef CMX_TX_DEBUG |
1896 | printk(KERN_DEBUG "%s\n" , debugbuf); |
1897 | #endif |
1898 | |
1899 | } |
1900 | |
1901 | /* |
1902 | * hdlc data is received from card and sent to all members. |
1903 | */ |
1904 | void |
1905 | dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb) |
1906 | { |
1907 | struct sk_buff *nskb = NULL; |
1908 | struct dsp_conf_member *member; |
1909 | struct mISDNhead *hh; |
1910 | |
1911 | /* not if not active */ |
1912 | if (!dsp->b_active) |
1913 | return; |
1914 | |
1915 | /* check if we have sompen */ |
1916 | if (skb->len < 1) |
1917 | return; |
1918 | |
1919 | /* no conf */ |
1920 | if (!dsp->conf) { |
1921 | /* in case of software echo */ |
1922 | if (dsp->echo.software) { |
1923 | nskb = skb_clone(skb, GFP_ATOMIC); |
1924 | if (nskb) { |
1925 | hh = mISDN_HEAD_P(nskb); |
1926 | hh->prim = PH_DATA_REQ; |
1927 | hh->id = 0; |
1928 | skb_queue_tail(list: &dsp->sendq, newsk: nskb); |
1929 | schedule_work(work: &dsp->workq); |
1930 | } |
1931 | } |
1932 | return; |
1933 | } |
1934 | /* in case of hardware conference */ |
1935 | if (dsp->conf->hardware) |
1936 | return; |
1937 | list_for_each_entry(member, &dsp->conf->mlist, list) { |
1938 | if (dsp->echo.software || member->dsp != dsp) { |
1939 | nskb = skb_clone(skb, GFP_ATOMIC); |
1940 | if (nskb) { |
1941 | hh = mISDN_HEAD_P(nskb); |
1942 | hh->prim = PH_DATA_REQ; |
1943 | hh->id = 0; |
1944 | skb_queue_tail(list: &member->dsp->sendq, newsk: nskb); |
1945 | schedule_work(work: &member->dsp->workq); |
1946 | } |
1947 | } |
1948 | } |
1949 | } |
1950 | |