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[SPARC64]: More sensible udelay implementation.
[firewire-audio.git] / sound / oss / dmasound / trans_16.c
blobca973ac2a30a653e698af58de3ac7a5f875b8bca
1 /*
2 * linux/sound/oss/dmasound/trans_16.c
3 *
4 * 16 bit translation routines. Only used by Power mac at present.
5 *
6 * See linux/sound/oss/dmasound/dmasound_core.c for copyright and
7 * history prior to 08/02/2001.
8 *
9 * 08/02/2001 Iain Sandoe
10 * split from dmasound_awacs.c
11 * 11/29/2003 Renzo Davoli (King Enzo)
12 * - input resampling (for soft rate < hard rate)
13 * - software line in gain control
14 */
15
16 #include <linux/soundcard.h>
17 #include <asm/uaccess.h>
18 #include "dmasound.h"
19
20 extern int expand_bal; /* Balance factor for expanding (not volume!) */
21 static short dmasound_alaw2dma16[] ;
22 static short dmasound_ulaw2dma16[] ;
23
24 static ssize_t pmac_ct_law(const u_char __user *userPtr, size_t userCount,
25 u_char frame[], ssize_t *frameUsed,
26 ssize_t frameLeft);
27 static ssize_t pmac_ct_s8(const u_char __user *userPtr, size_t userCount,
28 u_char frame[], ssize_t *frameUsed,
29 ssize_t frameLeft);
30 static ssize_t pmac_ct_u8(const u_char __user *userPtr, size_t userCount,
31 u_char frame[], ssize_t *frameUsed,
32 ssize_t frameLeft);
33 static ssize_t pmac_ct_s16(const u_char __user *userPtr, size_t userCount,
34 u_char frame[], ssize_t *frameUsed,
35 ssize_t frameLeft);
36 static ssize_t pmac_ct_u16(const u_char __user *userPtr, size_t userCount,
37 u_char frame[], ssize_t *frameUsed,
38 ssize_t frameLeft);
39
40 static ssize_t pmac_ctx_law(const u_char __user *userPtr, size_t userCount,
41 u_char frame[], ssize_t *frameUsed,
42 ssize_t frameLeft);
43 static ssize_t pmac_ctx_s8(const u_char __user *userPtr, size_t userCount,
44 u_char frame[], ssize_t *frameUsed,
45 ssize_t frameLeft);
46 static ssize_t pmac_ctx_u8(const u_char __user *userPtr, size_t userCount,
47 u_char frame[], ssize_t *frameUsed,
48 ssize_t frameLeft);
49 static ssize_t pmac_ctx_s16(const u_char __user *userPtr, size_t userCount,
50 u_char frame[], ssize_t *frameUsed,
51 ssize_t frameLeft);
52 static ssize_t pmac_ctx_u16(const u_char __user *userPtr, size_t userCount,
53 u_char frame[], ssize_t *frameUsed,
54 ssize_t frameLeft);
55
56 static ssize_t pmac_ct_s16_read(const u_char __user *userPtr, size_t userCount,
57 u_char frame[], ssize_t *frameUsed,
58 ssize_t frameLeft);
59 static ssize_t pmac_ct_u16_read(const u_char __user *userPtr, size_t userCount,
60 u_char frame[], ssize_t *frameUsed,
61 ssize_t frameLeft);
62
63 /*** Translations ************************************************************/
64
65 static int expand_data; /* Data for expanding */
66
67 static ssize_t pmac_ct_law(const u_char __user *userPtr, size_t userCount,
68 u_char frame[], ssize_t *frameUsed,
69 ssize_t frameLeft)
70 {
71 short *table = dmasound.soft.format == AFMT_MU_LAW
72 ? dmasound_ulaw2dma16 : dmasound_alaw2dma16;
73 ssize_t count, used;
74 short *p = (short *) &frame[*frameUsed];
75 int val, stereo = dmasound.soft.stereo;
76
77 frameLeft >>= 2;
78 if (stereo)
79 userCount >>= 1;
80 used = count = min_t(unsigned long, userCount, frameLeft);
81 while (count > 0) {
82 u_char data;
83 if (get_user(data, userPtr++))
84 return -EFAULT;
85 val = table[data];
86 *p++ = val;
87 if (stereo) {
88 if (get_user(data, userPtr++))
89 return -EFAULT;
90 val = table[data];
91 }
92 *p++ = val;
93 count--;
94 }
95 *frameUsed += used * 4;
96 return stereo? used * 2: used;
97 }
98
99
100 static ssize_t pmac_ct_s8(const u_char __user *userPtr, size_t userCount,
101 u_char frame[], ssize_t *frameUsed,
102 ssize_t frameLeft)
103 {
104 ssize_t count, used;
105 short *p = (short *) &frame[*frameUsed];
106 int val, stereo = dmasound.soft.stereo;
107
108 frameLeft >>= 2;
109 if (stereo)
110 userCount >>= 1;
111 used = count = min_t(unsigned long, userCount, frameLeft);
112 while (count > 0) {
113 u_char data;
114 if (get_user(data, userPtr++))
115 return -EFAULT;
116 val = data << 8;
117 *p++ = val;
118 if (stereo) {
119 if (get_user(data, userPtr++))
120 return -EFAULT;
121 val = data << 8;
122 }
123 *p++ = val;
124 count--;
125 }
126 *frameUsed += used * 4;
127 return stereo? used * 2: used;
128 }
129
130
131 static ssize_t pmac_ct_u8(const u_char __user *userPtr, size_t userCount,
132 u_char frame[], ssize_t *frameUsed,
133 ssize_t frameLeft)
134 {
135 ssize_t count, used;
136 short *p = (short *) &frame[*frameUsed];
137 int val, stereo = dmasound.soft.stereo;
138
139 frameLeft >>= 2;
140 if (stereo)
141 userCount >>= 1;
142 used = count = min_t(unsigned long, userCount, frameLeft);
143 while (count > 0) {
144 u_char data;
145 if (get_user(data, userPtr++))
146 return -EFAULT;
147 val = (data ^ 0x80) << 8;
148 *p++ = val;
149 if (stereo) {
150 if (get_user(data, userPtr++))
151 return -EFAULT;
152 val = (data ^ 0x80) << 8;
153 }
154 *p++ = val;
155 count--;
156 }
157 *frameUsed += used * 4;
158 return stereo? used * 2: used;
159 }
160
161
162 static ssize_t pmac_ct_s16(const u_char __user *userPtr, size_t userCount,
163 u_char frame[], ssize_t *frameUsed,
164 ssize_t frameLeft)
165 {
166 ssize_t count, used;
167 int stereo = dmasound.soft.stereo;
168 short *fp = (short *) &frame[*frameUsed];
169
170 frameLeft >>= 2;
171 userCount >>= (stereo? 2: 1);
172 used = count = min_t(unsigned long, userCount, frameLeft);
173 if (!stereo) {
174 short __user *up = (short __user *) userPtr;
175 while (count > 0) {
176 short data;
177 if (get_user(data, up++))
178 return -EFAULT;
179 *fp++ = data;
180 *fp++ = data;
181 count--;
182 }
183 } else {
184 if (copy_from_user(fp, userPtr, count * 4))
185 return -EFAULT;
186 }
187 *frameUsed += used * 4;
188 return stereo? used * 4: used * 2;
189 }
190
191 static ssize_t pmac_ct_u16(const u_char __user *userPtr, size_t userCount,
192 u_char frame[], ssize_t *frameUsed,
193 ssize_t frameLeft)
194 {
195 ssize_t count, used;
196 int mask = (dmasound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
197 int stereo = dmasound.soft.stereo;
198 short *fp = (short *) &frame[*frameUsed];
199 short __user *up = (short __user *) userPtr;
200
201 frameLeft >>= 2;
202 userCount >>= (stereo? 2: 1);
203 used = count = min_t(unsigned long, userCount, frameLeft);
204 while (count > 0) {
205 short data;
206 if (get_user(data, up++))
207 return -EFAULT;
208 data ^= mask;
209 *fp++ = data;
210 if (stereo) {
211 if (get_user(data, up++))
212 return -EFAULT;
213 data ^= mask;
214 }
215 *fp++ = data;
216 count--;
217 }
218 *frameUsed += used * 4;
219 return stereo? used * 4: used * 2;
220 }
221
222
223 static ssize_t pmac_ctx_law(const u_char __user *userPtr, size_t userCount,
224 u_char frame[], ssize_t *frameUsed,
225 ssize_t frameLeft)
226 {
227 unsigned short *table = (unsigned short *)
228 (dmasound.soft.format == AFMT_MU_LAW
229 ? dmasound_ulaw2dma16 : dmasound_alaw2dma16);
230 unsigned int data = expand_data;
231 unsigned int *p = (unsigned int *) &frame[*frameUsed];
232 int bal = expand_bal;
233 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
234 int utotal, ftotal;
235 int stereo = dmasound.soft.stereo;
236
237 frameLeft >>= 2;
238 if (stereo)
239 userCount >>= 1;
240 ftotal = frameLeft;
241 utotal = userCount;
242 while (frameLeft) {
243 u_char c;
244 if (bal < 0) {
245 if (userCount == 0)
246 break;
247 if (get_user(c, userPtr++))
248 return -EFAULT;
249 data = table[c];
250 if (stereo) {
251 if (get_user(c, userPtr++))
252 return -EFAULT;
253 data = (data << 16) + table[c];
254 } else
255 data = (data << 16) + data;
256 userCount--;
257 bal += hSpeed;
258 }
259 *p++ = data;
260 frameLeft--;
261 bal -= sSpeed;
262 }
263 expand_bal = bal;
264 expand_data = data;
265 *frameUsed += (ftotal - frameLeft) * 4;
266 utotal -= userCount;
267 return stereo? utotal * 2: utotal;
268 }
269
270 static ssize_t pmac_ctx_s8(const u_char __user *userPtr, size_t userCount,
271 u_char frame[], ssize_t *frameUsed,
272 ssize_t frameLeft)
273 {
274 unsigned int *p = (unsigned int *) &frame[*frameUsed];
275 unsigned int data = expand_data;
276 int bal = expand_bal;
277 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
278 int stereo = dmasound.soft.stereo;
279 int utotal, ftotal;
280
281 frameLeft >>= 2;
282 if (stereo)
283 userCount >>= 1;
284 ftotal = frameLeft;
285 utotal = userCount;
286 while (frameLeft) {
287 u_char c;
288 if (bal < 0) {
289 if (userCount == 0)
290 break;
291 if (get_user(c, userPtr++))
292 return -EFAULT;
293 data = c << 8;
294 if (stereo) {
295 if (get_user(c, userPtr++))
296 return -EFAULT;
297 data = (data << 16) + (c << 8);
298 } else
299 data = (data << 16) + data;
300 userCount--;
301 bal += hSpeed;
302 }
303 *p++ = data;
304 frameLeft--;
305 bal -= sSpeed;
306 }
307 expand_bal = bal;
308 expand_data = data;
309 *frameUsed += (ftotal - frameLeft) * 4;
310 utotal -= userCount;
311 return stereo? utotal * 2: utotal;
312 }
313
314
315 static ssize_t pmac_ctx_u8(const u_char __user *userPtr, size_t userCount,
316 u_char frame[], ssize_t *frameUsed,
317 ssize_t frameLeft)
318 {
319 unsigned int *p = (unsigned int *) &frame[*frameUsed];
320 unsigned int data = expand_data;
321 int bal = expand_bal;
322 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
323 int stereo = dmasound.soft.stereo;
324 int utotal, ftotal;
325
326 frameLeft >>= 2;
327 if (stereo)
328 userCount >>= 1;
329 ftotal = frameLeft;
330 utotal = userCount;
331 while (frameLeft) {
332 u_char c;
333 if (bal < 0) {
334 if (userCount == 0)
335 break;
336 if (get_user(c, userPtr++))
337 return -EFAULT;
338 data = (c ^ 0x80) << 8;
339 if (stereo) {
340 if (get_user(c, userPtr++))
341 return -EFAULT;
342 data = (data << 16) + ((c ^ 0x80) << 8);
343 } else
344 data = (data << 16) + data;
345 userCount--;
346 bal += hSpeed;
347 }
348 *p++ = data;
349 frameLeft--;
350 bal -= sSpeed;
351 }
352 expand_bal = bal;
353 expand_data = data;
354 *frameUsed += (ftotal - frameLeft) * 4;
355 utotal -= userCount;
356 return stereo? utotal * 2: utotal;
357 }
358
359
360 static ssize_t pmac_ctx_s16(const u_char __user *userPtr, size_t userCount,
361 u_char frame[], ssize_t *frameUsed,
362 ssize_t frameLeft)
363 {
364 unsigned int *p = (unsigned int *) &frame[*frameUsed];
365 unsigned int data = expand_data;
366 unsigned short __user *up = (unsigned short __user *) userPtr;
367 int bal = expand_bal;
368 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
369 int stereo = dmasound.soft.stereo;
370 int utotal, ftotal;
371
372 frameLeft >>= 2;
373 userCount >>= (stereo? 2: 1);
374 ftotal = frameLeft;
375 utotal = userCount;
376 while (frameLeft) {
377 unsigned short c;
378 if (bal < 0) {
379 if (userCount == 0)
380 break;
381 if (get_user(data, up++))
382 return -EFAULT;
383 if (stereo) {
384 if (get_user(c, up++))
385 return -EFAULT;
386 data = (data << 16) + c;
387 } else
388 data = (data << 16) + data;
389 userCount--;
390 bal += hSpeed;
391 }
392 *p++ = data;
393 frameLeft--;
394 bal -= sSpeed;
395 }
396 expand_bal = bal;
397 expand_data = data;
398 *frameUsed += (ftotal - frameLeft) * 4;
399 utotal -= userCount;
400 return stereo? utotal * 4: utotal * 2;
401 }
402
403
404 static ssize_t pmac_ctx_u16(const u_char __user *userPtr, size_t userCount,
405 u_char frame[], ssize_t *frameUsed,
406 ssize_t frameLeft)
407 {
408 int mask = (dmasound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
409 unsigned int *p = (unsigned int *) &frame[*frameUsed];
410 unsigned int data = expand_data;
411 unsigned short __user *up = (unsigned short __user *) userPtr;
412 int bal = expand_bal;
413 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
414 int stereo = dmasound.soft.stereo;
415 int utotal, ftotal;
416
417 frameLeft >>= 2;
418 userCount >>= (stereo? 2: 1);
419 ftotal = frameLeft;
420 utotal = userCount;
421 while (frameLeft) {
422 unsigned short c;
423 if (bal < 0) {
424 if (userCount == 0)
425 break;
426 if (get_user(data, up++))
427 return -EFAULT;
428 data ^= mask;
429 if (stereo) {
430 if (get_user(c, up++))
431 return -EFAULT;
432 data = (data << 16) + (c ^ mask);
433 } else
434 data = (data << 16) + data;
435 userCount--;
436 bal += hSpeed;
437 }
438 *p++ = data;
439 frameLeft--;
440 bal -= sSpeed;
441 }
442 expand_bal = bal;
443 expand_data = data;
444 *frameUsed += (ftotal - frameLeft) * 4;
445 utotal -= userCount;
446 return stereo? utotal * 4: utotal * 2;
447 }
448
449 /* data in routines... */
450
451 static ssize_t pmac_ct_s8_read(const u_char __user *userPtr, size_t userCount,
452 u_char frame[], ssize_t *frameUsed,
453 ssize_t frameLeft)
454 {
455 ssize_t count, used;
456 short *p = (short *) &frame[*frameUsed];
457 int val, stereo = dmasound.soft.stereo;
458
459 frameLeft >>= 2;
460 if (stereo)
461 userCount >>= 1;
462 used = count = min_t(unsigned long, userCount, frameLeft);
463 while (count > 0) {
464 u_char data;
465
466 val = *p++;
467 val = (val * software_input_volume) >> 7;
468 data = val >> 8;
469 if (put_user(data, (u_char __user *)userPtr++))
470 return -EFAULT;
471 if (stereo) {
472 val = *p;
473 val = (val * software_input_volume) >> 7;
474 data = val >> 8;
475 if (put_user(data, (u_char __user *)userPtr++))
476 return -EFAULT;
477 }
478 p++;
479 count--;
480 }
481 *frameUsed += used * 4;
482 return stereo? used * 2: used;
483 }
484
485
486 static ssize_t pmac_ct_u8_read(const u_char __user *userPtr, size_t userCount,
487 u_char frame[], ssize_t *frameUsed,
488 ssize_t frameLeft)
489 {
490 ssize_t count, used;
491 short *p = (short *) &frame[*frameUsed];
492 int val, stereo = dmasound.soft.stereo;
493
494 frameLeft >>= 2;
495 if (stereo)
496 userCount >>= 1;
497 used = count = min_t(unsigned long, userCount, frameLeft);
498 while (count > 0) {
499 u_char data;
500
501 val = *p++;
502 val = (val * software_input_volume) >> 7;
503 data = (val >> 8) ^ 0x80;
504 if (put_user(data, (u_char __user *)userPtr++))
505 return -EFAULT;
506 if (stereo) {
507 val = *p;
508 val = (val * software_input_volume) >> 7;
509 data = (val >> 8) ^ 0x80;
510 if (put_user(data, (u_char __user *)userPtr++))
511 return -EFAULT;
512 }
513 p++;
514 count--;
515 }
516 *frameUsed += used * 4;
517 return stereo? used * 2: used;
518 }
519
520 static ssize_t pmac_ct_s16_read(const u_char __user *userPtr, size_t userCount,
521 u_char frame[], ssize_t *frameUsed,
522 ssize_t frameLeft)
523 {
524 ssize_t count, used;
525 int stereo = dmasound.soft.stereo;
526 short *fp = (short *) &frame[*frameUsed];
527 short __user *up = (short __user *) userPtr;
528
529 frameLeft >>= 2;
530 userCount >>= (stereo? 2: 1);
531 used = count = min_t(unsigned long, userCount, frameLeft);
532 while (count > 0) {
533 short data;
534
535 data = *fp++;
536 data = (data * software_input_volume) >> 7;
537 if (put_user(data, up++))
538 return -EFAULT;
539 if (stereo) {
540 data = *fp;
541 data = (data * software_input_volume) >> 7;
542 if (put_user(data, up++))
543 return -EFAULT;
544 }
545 fp++;
546 count--;
547 }
548 *frameUsed += used * 4;
549 return stereo? used * 4: used * 2;
550 }
551
552 static ssize_t pmac_ct_u16_read(const u_char __user *userPtr, size_t userCount,
553 u_char frame[], ssize_t *frameUsed,
554 ssize_t frameLeft)
555 {
556 ssize_t count, used;
557 int mask = (dmasound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
558 int stereo = dmasound.soft.stereo;
559 short *fp = (short *) &frame[*frameUsed];
560 short __user *up = (short __user *) userPtr;
561
562 frameLeft >>= 2;
563 userCount >>= (stereo? 2: 1);
564 used = count = min_t(unsigned long, userCount, frameLeft);
565 while (count > 0) {
566 int data;
567
568 data = *fp++;
569 data = (data * software_input_volume) >> 7;
570 data ^= mask;
571 if (put_user(data, up++))
572 return -EFAULT;
573 if (stereo) {
574 data = *fp;
575 data = (data * software_input_volume) >> 7;
576 data ^= mask;
577 if (put_user(data, up++))
578 return -EFAULT;
579 }
580 fp++;
581 count--;
582 }
583 *frameUsed += used * 4;
584 return stereo? used * 4: used * 2;
585 }
586
587 /* data in routines (reducing speed)... */
588
589 static ssize_t pmac_ctx_s8_read(const u_char __user *userPtr, size_t userCount,
590 u_char frame[], ssize_t *frameUsed,
591 ssize_t frameLeft)
592 {
593 short *p = (short *) &frame[*frameUsed];
594 int bal = expand_read_bal;
595 int vall,valr, stereo = dmasound.soft.stereo;
596 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
597 int utotal, ftotal;
598
599 frameLeft >>= 2;
600 if (stereo)
601 userCount >>= 1;
602 ftotal = frameLeft;
603 utotal = userCount;
604 while (frameLeft) {
605 u_char data;
606
607 if (bal<0 && userCount == 0)
608 break;
609 vall = *p++;
610 vall = (vall * software_input_volume) >> 7;
611 if (stereo) {
612 valr = *p;
613 valr = (valr * software_input_volume) >> 7;
614 }
615 p++;
616 if (bal < 0) {
617 data = vall >> 8;
618 if (put_user(data, (u_char __user *)userPtr++))
619 return -EFAULT;
620 if (stereo) {
621 data = valr >> 8;
622 if (put_user(data, (u_char __user *)userPtr++))
623 return -EFAULT;
624 }
625 userCount--;
626 bal += hSpeed;
627 }
628 frameLeft--;
629 bal -= sSpeed;
630 }
631 expand_read_bal=bal;
632 *frameUsed += (ftotal - frameLeft) * 4;
633 utotal -= userCount;
634 return stereo? utotal * 2: utotal;
635 }
636
637
638 static ssize_t pmac_ctx_u8_read(const u_char __user *userPtr, size_t userCount,
639 u_char frame[], ssize_t *frameUsed,
640 ssize_t frameLeft)
641 {
642 short *p = (short *) &frame[*frameUsed];
643 int bal = expand_read_bal;
644 int vall,valr, stereo = dmasound.soft.stereo;
645 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
646 int utotal, ftotal;
647
648 frameLeft >>= 2;
649 if (stereo)
650 userCount >>= 1;
651 ftotal = frameLeft;
652 utotal = userCount;
653 while (frameLeft) {
654 u_char data;
655
656 if (bal<0 && userCount == 0)
657 break;
658
659 vall = *p++;
660 vall = (vall * software_input_volume) >> 7;
661 if (stereo) {
662 valr = *p;
663 valr = (valr * software_input_volume) >> 7;
664 }
665 p++;
666 if (bal < 0) {
667 data = (vall >> 8) ^ 0x80;
668 if (put_user(data, (u_char __user *)userPtr++))
669 return -EFAULT;
670 if (stereo) {
671 data = (valr >> 8) ^ 0x80;
672 if (put_user(data, (u_char __user *)userPtr++))
673 return -EFAULT;
674 }
675 userCount--;
676 bal += hSpeed;
677 }
678 frameLeft--;
679 bal -= sSpeed;
680 }
681 expand_read_bal=bal;
682 *frameUsed += (ftotal - frameLeft) * 4;
683 utotal -= userCount;
684 return stereo? utotal * 2: utotal;
685 }
686
687 static ssize_t pmac_ctx_s16_read(const u_char __user *userPtr, size_t userCount,
688 u_char frame[], ssize_t *frameUsed,
689 ssize_t frameLeft)
690 {
691 int bal = expand_read_bal;
692 short *fp = (short *) &frame[*frameUsed];
693 short __user *up = (short __user *) userPtr;
694 int stereo = dmasound.soft.stereo;
695 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
696 int utotal, ftotal;
697
698 frameLeft >>= 2;
699 userCount >>= (stereo? 2: 1);
700 ftotal = frameLeft;
701 utotal = userCount;
702 while (frameLeft) {
703 int datal,datar;
704
705 if (bal<0 && userCount == 0)
706 break;
707
708 datal = *fp++;
709 datal = (datal * software_input_volume) >> 7;
710 if (stereo) {
711 datar = *fp;
712 datar = (datar * software_input_volume) >> 7;
713 }
714 fp++;
715 if (bal < 0) {
716 if (put_user(datal, up++))
717 return -EFAULT;
718 if (stereo) {
719 if (put_user(datar, up++))
720 return -EFAULT;
721 }
722 userCount--;
723 bal += hSpeed;
724 }
725 frameLeft--;
726 bal -= sSpeed;
727 }
728 expand_read_bal=bal;
729 *frameUsed += (ftotal - frameLeft) * 4;
730 utotal -= userCount;
731 return stereo? utotal * 4: utotal * 2;
732 }
733
734 static ssize_t pmac_ctx_u16_read(const u_char __user *userPtr, size_t userCount,
735 u_char frame[], ssize_t *frameUsed,
736 ssize_t frameLeft)
737 {
738 int bal = expand_read_bal;
739 int mask = (dmasound.soft.format == AFMT_U16_LE? 0x0080: 0x8000);
740 short *fp = (short *) &frame[*frameUsed];
741 short __user *up = (short __user *) userPtr;
742 int stereo = dmasound.soft.stereo;
743 int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
744 int utotal, ftotal;
745
746 frameLeft >>= 2;
747 userCount >>= (stereo? 2: 1);
748 ftotal = frameLeft;
749 utotal = userCount;
750 while (frameLeft) {
751 int datal,datar;
752
753 if (bal<0 && userCount == 0)
754 break;
755
756 datal = *fp++;
757 datal = (datal * software_input_volume) >> 7;
758 datal ^= mask;
759 if (stereo) {
760 datar = *fp;
761 datar = (datar * software_input_volume) >> 7;
762 datar ^= mask;
763 }
764 fp++;
765 if (bal < 0) {
766 if (put_user(datal, up++))
767 return -EFAULT;
768 if (stereo) {
769 if (put_user(datar, up++))
770 return -EFAULT;
771 }
772 userCount--;
773 bal += hSpeed;
774 }
775 frameLeft--;
776 bal -= sSpeed;
777 }
778 expand_read_bal=bal;
779 *frameUsed += (ftotal - frameLeft) * 4;
780 utotal -= userCount;
781 return stereo? utotal * 4: utotal * 2;
782 }
783
784
785 TRANS transAwacsNormal = {
786 .ct_ulaw= pmac_ct_law,
787 .ct_alaw= pmac_ct_law,
788 .ct_s8= pmac_ct_s8,
789 .ct_u8= pmac_ct_u8,
790 .ct_s16be= pmac_ct_s16,
791 .ct_u16be= pmac_ct_u16,
792 .ct_s16le= pmac_ct_s16,
793 .ct_u16le= pmac_ct_u16,
794 };
795
796 TRANS transAwacsExpand = {
797 .ct_ulaw= pmac_ctx_law,
798 .ct_alaw= pmac_ctx_law,
799 .ct_s8= pmac_ctx_s8,
800 .ct_u8= pmac_ctx_u8,
801 .ct_s16be= pmac_ctx_s16,
802 .ct_u16be= pmac_ctx_u16,
803 .ct_s16le= pmac_ctx_s16,
804 .ct_u16le= pmac_ctx_u16,
805 };
806
807 TRANS transAwacsNormalRead = {
808 .ct_s8= pmac_ct_s8_read,
809 .ct_u8= pmac_ct_u8_read,
810 .ct_s16be= pmac_ct_s16_read,
811 .ct_u16be= pmac_ct_u16_read,
812 .ct_s16le= pmac_ct_s16_read,
813 .ct_u16le= pmac_ct_u16_read,
814 };
815
816 TRANS transAwacsExpandRead = {
817 .ct_s8= pmac_ctx_s8_read,
818 .ct_u8= pmac_ctx_u8_read,
819 .ct_s16be= pmac_ctx_s16_read,
820 .ct_u16be= pmac_ctx_u16_read,
821 .ct_s16le= pmac_ctx_s16_read,
822 .ct_u16le= pmac_ctx_u16_read,
823 };
824
825 /* translation tables */
826 /* 16 bit mu-law */
827
828 static short dmasound_ulaw2dma16[] = {
829 -32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
830 -23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
831 -15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
832 -11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
833 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
834 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
835 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
836 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
837 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
838 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
839 -876, -844, -812, -780, -748, -716, -684, -652,
840 -620, -588, -556, -524, -492, -460, -428, -396,
841 -372, -356, -340, -324, -308, -292, -276, -260,
842 -244, -228, -212, -196, -180, -164, -148, -132,
843 -120, -112, -104, -96, -88, -80, -72, -64,
844 -56, -48, -40, -32, -24, -16, -8, 0,
845 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
846 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
847 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
848 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
849 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
850 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
851 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
852 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
853 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
854 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
855 876, 844, 812, 780, 748, 716, 684, 652,
856 620, 588, 556, 524, 492, 460, 428, 396,
857 372, 356, 340, 324, 308, 292, 276, 260,
858 244, 228, 212, 196, 180, 164, 148, 132,
859 120, 112, 104, 96, 88, 80, 72, 64,
860 56, 48, 40, 32, 24, 16, 8, 0,
861 };
862
863 /* 16 bit A-law */
864
865 static short dmasound_alaw2dma16[] = {
866 -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
867 -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
868 -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
869 -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
870 -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
871 -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
872 -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
873 -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
874 -344, -328, -376, -360, -280, -264, -312, -296,
875 -472, -456, -504, -488, -408, -392, -440, -424,
876 -88, -72, -120, -104, -24, -8, -56, -40,
877 -216, -200, -248, -232, -152, -136, -184, -168,
878 -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
879 -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
880 -688, -656, -752, -720, -560, -528, -624, -592,
881 -944, -912, -1008, -976, -816, -784, -880, -848,
882 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
883 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
884 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
885 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
886 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
887 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
888 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
889 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
890 344, 328, 376, 360, 280, 264, 312, 296,
891 472, 456, 504, 488, 408, 392, 440, 424,
892 88, 72, 120, 104, 24, 8, 56, 40,
893 216, 200, 248, 232, 152, 136, 184, 168,
894 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
895 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
896 688, 656, 752, 720, 560, 528, 624, 592,
897 944, 912, 1008, 976, 816, 784, 880, 848,
898 };
AMDTP streaming driver for the Linux FireWire stack (Juju)