Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 53fc04d75badf3be8c27075d2d84afe1965bf1f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
#ifndef __SOUND_PCM_H
#define __SOUND_PCM_H

/*
 *  Digital Audio (PCM) abstract layer
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *                   Abramo Bagnara <abramo@alsa-project.org>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/asound.h>
#include <sound/memalloc.h>
#include <linux/poll.h>
#include <linux/bitops.h>

typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
typedef enum sndrv_pcm_class snd_pcm_class_t;
typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
typedef enum sndrv_pcm_stream snd_pcm_stream_t;
typedef enum sndrv_pcm_access snd_pcm_access_t;
typedef enum sndrv_pcm_format snd_pcm_format_t;
typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
typedef enum sndrv_pcm_state snd_pcm_state_t;
typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
typedef struct sndrv_pcm_info snd_pcm_info_t;
typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
typedef enum sndrv_pcm_start snd_pcm_start_t;
typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
typedef struct sndrv_pcm_status snd_pcm_status_t;
typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
typedef struct sndrv_mask snd_mask_t;
typedef struct snd_sg_buf snd_pcm_sgbuf_t;

#define snd_pcm_substream_chip(substream) ((substream)->private_data)
#define snd_pcm_chip(pcm) ((pcm)->private_data)

typedef struct _snd_pcm_file snd_pcm_file_t;
typedef struct _snd_pcm_runtime snd_pcm_runtime_t;

#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
#include "pcm_oss.h"
#endif

/*
 *  Hardware (lowlevel) section
 */

typedef struct _snd_pcm_hardware {
	unsigned int info;		/* SNDRV_PCM_INFO_* */
	u64 formats;			/* SNDRV_PCM_FMTBIT_* */
	unsigned int rates;		/* SNDRV_PCM_RATE_* */
	unsigned int rate_min;		/* min rate */
	unsigned int rate_max;		/* max rate */
	unsigned int channels_min;	/* min channels */
	unsigned int channels_max;	/* max channels */
	size_t buffer_bytes_max;	/* max buffer size */
	size_t period_bytes_min;	/* min period size */
	size_t period_bytes_max;	/* max period size */
	unsigned int periods_min;	/* min # of periods */
	unsigned int periods_max;	/* max # of periods */
	size_t fifo_size;		/* fifo size in bytes */
} snd_pcm_hardware_t;

typedef struct _snd_pcm_ops {
	int (*open)(snd_pcm_substream_t *substream);
	int (*close)(snd_pcm_substream_t *substream);
	int (*ioctl)(snd_pcm_substream_t * substream,
		     unsigned int cmd, void *arg);
	int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
	int (*hw_free)(snd_pcm_substream_t *substream);
	int (*prepare)(snd_pcm_substream_t * substream);
	int (*trigger)(snd_pcm_substream_t * substream, int cmd);
	snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
	int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
		    void __user *buf, snd_pcm_uframes_t count);
	int (*silence)(snd_pcm_substream_t *substream, int channel, 
		       snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
	struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
	int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
	int (*ack)(snd_pcm_substream_t *substream);
} snd_pcm_ops_t;

/*
 *
 */

#define SNDRV_PCM_DEVICES		8

#define SNDRV_PCM_IOCTL1_FALSE		((void *)0)
#define SNDRV_PCM_IOCTL1_TRUE		((void *)1)

#define SNDRV_PCM_IOCTL1_RESET		0
#define SNDRV_PCM_IOCTL1_INFO		1
#define SNDRV_PCM_IOCTL1_CHANNEL_INFO	2
#define SNDRV_PCM_IOCTL1_GSTATE		3

#define SNDRV_PCM_TRIGGER_STOP		0
#define SNDRV_PCM_TRIGGER_START		1
#define SNDRV_PCM_TRIGGER_PAUSE_PUSH	3
#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE	4
#define SNDRV_PCM_TRIGGER_SUSPEND	5
#define SNDRV_PCM_TRIGGER_RESUME	6

#define SNDRV_PCM_POS_XRUN		((snd_pcm_uframes_t)-1)

/* If you change this don't forget to change rates[] table in pcm_native.c */
#define SNDRV_PCM_RATE_5512		(1<<0)		/* 5512Hz */
#define SNDRV_PCM_RATE_8000		(1<<1)		/* 8000Hz */
#define SNDRV_PCM_RATE_11025		(1<<2)		/* 11025Hz */
#define SNDRV_PCM_RATE_16000		(1<<3)		/* 16000Hz */
#define SNDRV_PCM_RATE_22050		(1<<4)		/* 22050Hz */
#define SNDRV_PCM_RATE_32000		(1<<5)		/* 32000Hz */
#define SNDRV_PCM_RATE_44100		(1<<6)		/* 44100Hz */
#define SNDRV_PCM_RATE_48000		(1<<7)		/* 48000Hz */
#define SNDRV_PCM_RATE_64000		(1<<8)		/* 64000Hz */
#define SNDRV_PCM_RATE_88200		(1<<9)		/* 88200Hz */
#define SNDRV_PCM_RATE_96000		(1<<10)		/* 96000Hz */
#define SNDRV_PCM_RATE_176400		(1<<11)		/* 176400Hz */
#define SNDRV_PCM_RATE_192000		(1<<12)		/* 192000Hz */

#define SNDRV_PCM_RATE_CONTINUOUS	(1<<30)		/* continuous range */
#define SNDRV_PCM_RATE_KNOT		(1<<31)		/* supports more non-continuos rates */

#define SNDRV_PCM_RATE_8000_44100	(SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
					 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
					 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
#define SNDRV_PCM_RATE_8000_48000	(SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
#define SNDRV_PCM_RATE_8000_96000	(SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
					 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
#define SNDRV_PCM_RATE_8000_192000	(SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
					 SNDRV_PCM_RATE_192000)
#define SNDRV_PCM_FMTBIT_S8		(1ULL << SNDRV_PCM_FORMAT_S8)
#define SNDRV_PCM_FMTBIT_U8		(1ULL << SNDRV_PCM_FORMAT_U8)
#define SNDRV_PCM_FMTBIT_S16_LE		(1ULL << SNDRV_PCM_FORMAT_S16_LE)
#define SNDRV_PCM_FMTBIT_S16_BE		(1ULL << SNDRV_PCM_FORMAT_S16_BE)
#define SNDRV_PCM_FMTBIT_U16_LE		(1ULL << SNDRV_PCM_FORMAT_U16_LE)
#define SNDRV_PCM_FMTBIT_U16_BE		(1ULL << SNDRV_PCM_FORMAT_U16_BE)
#define SNDRV_PCM_FMTBIT_S24_LE		(1ULL << SNDRV_PCM_FORMAT_S24_LE)
#define SNDRV_PCM_FMTBIT_S24_BE		(1ULL << SNDRV_PCM_FORMAT_S24_BE)
#define SNDRV_PCM_FMTBIT_U24_LE		(1ULL << SNDRV_PCM_FORMAT_U24_LE)
#define SNDRV_PCM_FMTBIT_U24_BE		(1ULL << SNDRV_PCM_FORMAT_U24_BE)
#define SNDRV_PCM_FMTBIT_S32_LE		(1ULL << SNDRV_PCM_FORMAT_S32_LE)
#define SNDRV_PCM_FMTBIT_S32_BE		(1ULL << SNDRV_PCM_FORMAT_S32_BE)
#define SNDRV_PCM_FMTBIT_U32_LE		(1ULL << SNDRV_PCM_FORMAT_U32_LE)
#define SNDRV_PCM_FMTBIT_U32_BE		(1ULL << SNDRV_PCM_FORMAT_U32_BE)
#define SNDRV_PCM_FMTBIT_FLOAT_LE	(1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
#define SNDRV_PCM_FMTBIT_FLOAT_BE	(1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
#define SNDRV_PCM_FMTBIT_FLOAT64_LE	(1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
#define SNDRV_PCM_FMTBIT_FLOAT64_BE	(1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
#define SNDRV_PCM_FMTBIT_MU_LAW		(1ULL << SNDRV_PCM_FORMAT_MU_LAW)
#define SNDRV_PCM_FMTBIT_A_LAW		(1ULL << SNDRV_PCM_FORMAT_A_LAW)
#define SNDRV_PCM_FMTBIT_IMA_ADPCM	(1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
#define SNDRV_PCM_FMTBIT_MPEG		(1ULL << SNDRV_PCM_FORMAT_MPEG)
#define SNDRV_PCM_FMTBIT_GSM		(1ULL << SNDRV_PCM_FORMAT_GSM)
#define SNDRV_PCM_FMTBIT_SPECIAL	(1ULL << SNDRV_PCM_FORMAT_SPECIAL)
#define SNDRV_PCM_FMTBIT_S24_3LE	(1ULL << SNDRV_PCM_FORMAT_S24_3LE)
#define SNDRV_PCM_FMTBIT_U24_3LE	(1ULL << SNDRV_PCM_FORMAT_U24_3LE)
#define SNDRV_PCM_FMTBIT_S24_3BE	(1ULL << SNDRV_PCM_FORMAT_S24_3BE)
#define SNDRV_PCM_FMTBIT_U24_3BE	(1ULL << SNDRV_PCM_FORMAT_U24_3BE)
#define SNDRV_PCM_FMTBIT_S20_3LE	(1ULL << SNDRV_PCM_FORMAT_S20_3LE)
#define SNDRV_PCM_FMTBIT_U20_3LE	(1ULL << SNDRV_PCM_FORMAT_U20_3LE)
#define SNDRV_PCM_FMTBIT_S20_3BE	(1ULL << SNDRV_PCM_FORMAT_S20_3BE)
#define SNDRV_PCM_FMTBIT_U20_3BE	(1ULL << SNDRV_PCM_FORMAT_U20_3BE)
#define SNDRV_PCM_FMTBIT_S18_3LE	(1ULL << SNDRV_PCM_FORMAT_S18_3LE)
#define SNDRV_PCM_FMTBIT_U18_3LE	(1ULL << SNDRV_PCM_FORMAT_U18_3LE)
#define SNDRV_PCM_FMTBIT_S18_3BE	(1ULL << SNDRV_PCM_FORMAT_S18_3BE)
#define SNDRV_PCM_FMTBIT_U18_3BE	(1ULL << SNDRV_PCM_FORMAT_U18_3BE)

#ifdef SNDRV_LITTLE_ENDIAN
#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_LE
#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_LE
#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_LE
#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_LE
#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_LE
#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_LE
#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_LE
#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_LE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
#endif
#ifdef SNDRV_BIG_ENDIAN
#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_BE
#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_BE
#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_BE
#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_BE
#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_BE
#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_BE
#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_BE
#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_BE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
#endif

struct _snd_pcm_file {
	snd_pcm_substream_t * substream;
	struct _snd_pcm_file * next;
};

typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;

typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
				      snd_pcm_hw_rule_t *rule);

struct _snd_pcm_hw_rule {
	unsigned int cond;
	snd_pcm_hw_rule_func_t func;
	int var;
	int deps[4];
	void *private;
};

typedef struct _snd_pcm_hw_constraints {
	snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
			 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
	snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
			     SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
	unsigned int rules_num;
	unsigned int rules_all;
	snd_pcm_hw_rule_t *rules;
} snd_pcm_hw_constraints_t;

static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
				       snd_pcm_hw_param_t var)
{
	return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}

static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
					  snd_pcm_hw_param_t var)
{
	return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}

typedef struct {
	unsigned int num;
	unsigned int den_min, den_max, den_step;
} ratnum_t;

typedef struct {
	unsigned int num_min, num_max, num_step;
	unsigned int den;
} ratden_t;

typedef struct {
	int nrats;
	ratnum_t *rats;
} snd_pcm_hw_constraint_ratnums_t;

typedef struct {
	int nrats;
	ratden_t *rats;
} snd_pcm_hw_constraint_ratdens_t;

typedef struct {
	unsigned int count;
	unsigned int *list;
	unsigned int mask;
} snd_pcm_hw_constraint_list_t;

struct _snd_pcm_runtime {
	/* -- Status -- */
	snd_pcm_substream_t *trigger_master;
	snd_timestamp_t trigger_tstamp;	/* trigger timestamp */
	int overrange;
	snd_pcm_uframes_t avail_max;
	snd_pcm_uframes_t hw_ptr_base;	/* Position at buffer restart */
	snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/

	/* -- HW params -- */
	snd_pcm_access_t access;	/* access mode */
	snd_pcm_format_t format;	/* SNDRV_PCM_FORMAT_* */
	snd_pcm_subformat_t subformat;	/* subformat */
	unsigned int rate;		/* rate in Hz */
	unsigned int channels;		/* channels */
	snd_pcm_uframes_t period_size;	/* period size */
	unsigned int periods;		/* periods */
	snd_pcm_uframes_t buffer_size;	/* buffer size */
	unsigned int tick_time;		/* tick time */
	snd_pcm_uframes_t min_align;	/* Min alignment for the format */
	size_t byte_align;
	unsigned int frame_bits;
	unsigned int sample_bits;
	unsigned int info;
	unsigned int rate_num;
	unsigned int rate_den;

	/* -- SW params -- */
	int tstamp_timespec;		/* use timeval (0) or timespec (1) */
	snd_pcm_tstamp_t tstamp_mode;	/* mmap timestamp is updated */
  	unsigned int period_step;
	unsigned int sleep_min;		/* min ticks to sleep */
	snd_pcm_uframes_t xfer_align;	/* xfer size need to be a multiple */
	snd_pcm_uframes_t start_threshold;
	snd_pcm_uframes_t stop_threshold;
	snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
						noise is nearest than this */
	snd_pcm_uframes_t silence_size;	/* Silence filling size */
	snd_pcm_uframes_t boundary;	/* pointers wrap point */

	snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
	snd_pcm_uframes_t silence_filled; /* size filled with silence */

	snd_pcm_sync_id_t sync;		/* hardware synchronization ID */

	/* -- mmap -- */
	volatile snd_pcm_mmap_status_t *status;
	volatile snd_pcm_mmap_control_t *control;
	atomic_t mmap_count;

	/* -- locking / scheduling -- */
	wait_queue_head_t sleep;
	struct timer_list tick_timer;
	struct fasync_struct *fasync;

	/* -- private section -- */
	void *private_data;
	void (*private_free)(snd_pcm_runtime_t *runtime);

	/* -- hardware description -- */
	snd_pcm_hardware_t hw;
	snd_pcm_hw_constraints_t hw_constraints;

	/* -- interrupt callbacks -- */
	void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
	void (*transfer_ack_end)(snd_pcm_substream_t *substream);

	/* -- timer -- */
	unsigned int timer_resolution;	/* timer resolution */

	/* -- DMA -- */           
	unsigned char *dma_area;	/* DMA area */
	dma_addr_t dma_addr;		/* physical bus address (not accessible from main CPU) */
	size_t dma_bytes;		/* size of DMA area */

	struct snd_dma_buffer *dma_buffer_p;	/* allocated buffer */

#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
	/* -- OSS things -- */
	snd_pcm_oss_runtime_t oss;
#endif
};

typedef struct _snd_pcm_group {		/* keep linked substreams */
	spinlock_t lock;
	struct list_head substreams;
	int count;
} snd_pcm_group_t;

struct _snd_pcm_substream {
	snd_pcm_t *pcm;
	snd_pcm_str_t *pstr;
	void *private_data;		/* copied from pcm->private_data */
	int number;
	char name[32];			/* substream name */
	int stream;			/* stream (direction) */
	size_t buffer_bytes_max;	/* limit ring buffer size */
	struct snd_dma_buffer dma_buffer;
	unsigned int dma_buf_id;
	size_t dma_max;
	/* -- hardware operations -- */
	unsigned int open_flag: 1;	/* lowlevel device has been opened */
	snd_pcm_ops_t *ops;
	/* -- runtime information -- */
	snd_pcm_runtime_t *runtime;
        /* -- timer section -- */
	snd_timer_t *timer;		/* timer */
	unsigned timer_running: 1;	/* time is running */
	spinlock_t timer_lock;
	/* -- next substream -- */
	snd_pcm_substream_t *next;
	/* -- linked substreams -- */
	struct list_head link_list;	/* linked list member */
	snd_pcm_group_t self_group;	/* fake group for non linked substream (with substream lock inside) */
	snd_pcm_group_t *group;		/* pointer to current group */
	/* -- assigned files -- */
	snd_pcm_file_t *file;
	struct file *ffile;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
	/* -- OSS things -- */
	snd_pcm_oss_substream_t oss;
#endif
	snd_info_entry_t *proc_root;
	snd_info_entry_t *proc_info_entry;
	snd_info_entry_t *proc_hw_params_entry;
	snd_info_entry_t *proc_sw_params_entry;
	snd_info_entry_t *proc_status_entry;
	snd_info_entry_t *proc_prealloc_entry;
	/* misc flags */
	unsigned int no_mmap_ctrl: 1;
};

#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
#else
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
#endif


struct _snd_pcm_str {
	int stream;				/* stream (direction) */
	snd_pcm_t *pcm;
	/* -- substreams -- */
	unsigned int substream_count;
	unsigned int substream_opened;
	snd_pcm_substream_t *substream;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
	/* -- OSS things -- */
	snd_pcm_oss_stream_t oss;
#endif
	snd_pcm_file_t *files;
	snd_minor_t *reg;
	snd_info_entry_t *proc_root;
	snd_info_entry_t *proc_info_entry;
#ifdef CONFIG_SND_DEBUG
	unsigned int xrun_debug;	/* 0 = disabled, 1 = verbose, 2 = stacktrace */
	snd_info_entry_t *proc_xrun_debug_entry;
#endif
};

struct _snd_pcm {
	snd_card_t *card;
	unsigned int device;	/* device number */
	unsigned int info_flags;
	unsigned short dev_class;
	unsigned short dev_subclass;
	char id[64];
	char name[80];
	snd_pcm_str_t streams[2];
	struct semaphore open_mutex;
	wait_queue_head_t open_wait;
	void *private_data;
	void (*private_free) (snd_pcm_t *pcm);
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
	snd_pcm_oss_t oss;
#endif
};

typedef struct _snd_pcm_notify {
	int (*n_register) (snd_pcm_t * pcm);
	int (*n_disconnect) (snd_pcm_t * pcm);
	int (*n_unregister) (snd_pcm_t * pcm);
	struct list_head list;
} snd_pcm_notify_t;

/*
 *  Registering
 */

extern snd_pcm_t *snd_pcm_devices[];
extern snd_minor_t snd_pcm_reg[2];

int snd_pcm_new(snd_card_t * card, char *id, int device,
		int playback_count, int capture_count,
		snd_pcm_t **rpcm);
int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);

int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);

/*
 *  Native I/O
 */

extern rwlock_t snd_pcm_link_rwlock;

int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
int snd_pcm_prepare(snd_pcm_substream_t *substream);
int snd_pcm_start(snd_pcm_substream_t *substream);
int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
int snd_pcm_drain_done(snd_pcm_substream_t *substream);
#ifdef CONFIG_PM
int snd_pcm_suspend(snd_pcm_substream_t *substream);
int snd_pcm_suspend_all(snd_pcm_t *pcm);
#endif
int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
void snd_pcm_release_substream(snd_pcm_substream_t *substream);
void snd_pcm_vma_notify_data(void *client, void *data);
int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);

#if BITS_PER_LONG >= 64

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	*rem = *n % div;
	*n /= div;
}

#elif defined(i386)

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	u_int32_t low, high;
	low = *n & 0xffffffff;
	high = *n >> 32;
	if (high) {
		u_int32_t high1 = high % div;
		high /= div;
		asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
		*n = (u_int64_t)high << 32 | low;
	} else {
		*n = low / div;
		*rem = low % div;
	}
}
#else

static inline void divl(u_int32_t high, u_int32_t low,
			u_int32_t div,
			u_int32_t *q, u_int32_t *r)
{
	u_int64_t n = (u_int64_t)high << 32 | low;
	u_int64_t d = (u_int64_t)div << 31;
	u_int32_t q1 = 0;
	int c = 32;
	while (n > 0xffffffffU) {
		q1 <<= 1;
		if (n >= d) {
			n -= d;
			q1 |= 1;
		}
		d >>= 1;
		c--;
	}
	q1 <<= c;
	if (n) {
		low = n;
		*q = q1 | (low / div);
		*r = low % div;
	} else {
		*r = 0;
		*q = q1;
	}
	return;
}

static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
	u_int32_t low, high;
	low = *n & 0xffffffff;
	high = *n >> 32;
	if (high) {
		u_int32_t high1 = high % div;
		u_int32_t low1 = low;
		high /= div;
		divl(high1, low1, div, &low, rem);
		*n = (u_int64_t)high << 32 | low;
	} else {
		*n = low / div;
		*rem = low % div;
	}
}
#endif

/*
 *  PCM library
 */

static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
{
	return substream->group != &substream->self_group;
}

static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
{
	read_lock(&snd_pcm_link_rwlock);
	spin_lock(&substream->self_group.lock);
}

static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
{
	spin_unlock(&substream->self_group.lock);
	read_unlock(&snd_pcm_link_rwlock);
}

static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
{
	read_lock_irq(&snd_pcm_link_rwlock);
	spin_lock(&substream->self_group.lock);
}

static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
{
	spin_unlock(&substream->self_group.lock);
	read_unlock_irq(&snd_pcm_link_rwlock);
}

#define snd_pcm_stream_lock_irqsave(substream, flags) \
do { \
	read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
	spin_lock(&substream->self_group.lock); \
} while (0)

#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
do { \
	spin_unlock(&substream->self_group.lock); \
	read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
} while (0)

#define snd_pcm_group_for_each(pos, substream) \
	list_for_each(pos, &substream->group->substreams)

#define snd_pcm_group_substream_entry(pos) \
	list_entry(pos, snd_pcm_substream_t, link_list)

static inline int snd_pcm_running(snd_pcm_substream_t *substream)
{
	return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
		(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
		 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
}

static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * 8 / runtime->sample_bits;
}

static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * 8 / runtime->frame_bits;
}

static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
{
	return size * runtime->sample_bits / 8;
}

static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
{
	return size * runtime->frame_bits / 8;
}

static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
{
	return bytes % runtime->byte_align == 0;
}

static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return frames_to_bytes(runtime, runtime->buffer_size);
}

static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return frames_to_bytes(runtime, runtime->period_size);
}

/*
 *  result is: 0 ... (boundary - 1)
 */
static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
{
	snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
	if (avail < 0)
		avail += runtime->boundary;
	else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
		avail -= runtime->boundary;
	return avail;
}

/*
 *  result is: 0 ... (boundary - 1)
 */
static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
{
	snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
	if (avail < 0)
		avail += runtime->boundary;
	return avail;
}

static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
{
	return runtime->buffer_size - snd_pcm_playback_avail(runtime);
}

static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
{
	return runtime->buffer_size - snd_pcm_capture_avail(runtime);
}

/**
 * snd_pcm_playback_ready - check whether the playback buffer is available
 * @substream: the pcm substream instance
 *
 * Checks whether enough free space is available on the playback buffer.
 *
 * Returns non-zero if available, or zero if not.
 */
static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
}

/**
 * snd_pcm_capture_ready - check whether the capture buffer is available
 * @substream: the pcm substream instance
 *
 * Checks whether enough capture data is available on the capture buffer.
 *
 * Returns non-zero if available, or zero if not.
 */
static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
}

/**
 * snd_pcm_playback_data - check whether any data exists on the playback buffer
 * @substream: the pcm substream instance
 *
 * Checks whether any data exists on the playback buffer. If stop_threshold
 * is bigger or equal to boundary, then this function returns always non-zero.
 *
 * Returns non-zero if exists, or zero if not.
 */
static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	
	if (runtime->stop_threshold >= runtime->boundary)
		return 1;
	return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
}

/**
 * snd_pcm_playback_empty - check whether the playback buffer is empty
 * @substream: the pcm substream instance
 *
 * Checks whether the playback buffer is empty.
 *
 * Returns non-zero if empty, or zero if not.
 */
static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
}

/**
 * snd_pcm_capture_empty - check whether the capture buffer is empty
 * @substream: the pcm substream instance
 *
 * Checks whether the capture buffer is empty.
 *
 * Returns non-zero if empty, or zero if not.
 */
static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	return snd_pcm_capture_avail(runtime) == 0;
}

static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream, 
					snd_pcm_substream_t *master)
{
	substream->runtime->trigger_master = master;
}

static inline int hw_is_mask(int var)
{
	return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
		var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
}

static inline int hw_is_interval(int var)
{
	return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
		var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
}

static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
				     snd_pcm_hw_param_t var)
{
	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}

static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
					     snd_pcm_hw_param_t var)
{
	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}

static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
					     snd_pcm_hw_param_t var)
{
	return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
}

static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
						     snd_pcm_hw_param_t var)
{
	return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
}

#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min


int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, 
			  unsigned int k, snd_interval_t *c);
void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
			  const snd_interval_t *b, snd_interval_t *c);
int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
int snd_interval_ratnum(snd_interval_t *i,
			unsigned int rats_count, ratnum_t *rats,
			unsigned int *nump, unsigned int *denp);

void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
int snd_pcm_hw_param_min(snd_pcm_substream_t *substream, 
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int *dir);
int snd_pcm_hw_param_max(snd_pcm_substream_t *substream, 
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int *dir);
int snd_pcm_hw_param_setinteger(snd_pcm_substream_t *substream, 
				snd_pcm_hw_params_t *params,
				snd_pcm_hw_param_t var);
int snd_pcm_hw_param_first(snd_pcm_substream_t *substream, 
			   snd_pcm_hw_params_t *params,
			   snd_pcm_hw_param_t var, int *dir);
int snd_pcm_hw_param_last(snd_pcm_substream_t *substream, 
			  snd_pcm_hw_params_t *params,
			  snd_pcm_hw_param_t var, int *dir);
int snd_pcm_hw_param_near(snd_pcm_substream_t *substream, 
			  snd_pcm_hw_params_t *params,
			  snd_pcm_hw_param_t var, 
			  unsigned int val, int *dir);
int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
			 snd_pcm_hw_params_t *params,
			 snd_pcm_hw_param_t var,
			 unsigned int val, int dir);
int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);

int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
int snd_pcm_hw_params(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);

int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);

int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
			       u_int32_t mask);
int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
				 u_int64_t mask);
int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
				 unsigned int min, unsigned int max);
int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, 
			       unsigned int cond,
			       snd_pcm_hw_param_t var,
			       snd_pcm_hw_constraint_list_t *l);
int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, 
				  unsigned int cond,
				  snd_pcm_hw_param_t var,
				  snd_pcm_hw_constraint_ratnums_t *r);
int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, 
				  unsigned int cond,
				  snd_pcm_hw_param_t var,
				  snd_pcm_hw_constraint_ratdens_t *r);
int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, 
				 unsigned int cond,
				 unsigned int width,
				 unsigned int msbits);
int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
			       unsigned int cond,
			       snd_pcm_hw_param_t var,
			       unsigned long step);
int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
			       unsigned int cond,
			       snd_pcm_hw_param_t var);
int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
			unsigned int cond,
			int var,
			snd_pcm_hw_rule_func_t func, void *private,
			int dep, ...);

int snd_pcm_format_signed(snd_pcm_format_t format);
int snd_pcm_format_unsigned(snd_pcm_format_t format);
int snd_pcm_format_linear(snd_pcm_format_t format);
int snd_pcm_format_little_endian(snd_pcm_format_t format);
int snd_pcm_format_big_endian(snd_pcm_format_t format);
int snd_pcm_format_width(snd_pcm_format_t format);			/* in bits */
int snd_pcm_format_physical_width(snd_pcm_format_t format);		/* in bits */
const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
const char *snd_pcm_format_name(snd_pcm_format_t format);

void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
void snd_pcm_set_sync(snd_pcm_substream_t * substream);
int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
		      unsigned int cmd, void *arg);                      
int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
				    const void __user *buf,
				    snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
				   void __user *buf, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
				     void __user **bufs, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
				    void __user **bufs, snd_pcm_uframes_t frames);

int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);

static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
					      struct snd_dma_buffer *bufp)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	if (bufp) {
		runtime->dma_buffer_p = bufp;
		runtime->dma_area = bufp->area;
		runtime->dma_addr = bufp->addr;
		runtime->dma_bytes = bufp->bytes;
	} else {
		runtime->dma_buffer_p = NULL;
		runtime->dma_area = NULL;
		runtime->dma_addr = 0;
		runtime->dma_bytes = 0;
	}
}

/*
 *  Timer interface
 */

void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
void snd_pcm_timer_init(snd_pcm_substream_t * substream);
void snd_pcm_timer_done(snd_pcm_substream_t * substream);

/*
 *  Memory
 */

int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
				  int type, struct device *data,
				  size_t size, size_t max);
int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
					  int type, void *data,
					  size_t size, size_t max);
int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);

#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);

/* handle mmap counter - PCM mmap callback should handle this counter properly */
static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
{
	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
	atomic_inc(&substream->runtime->mmap_count);
}

static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
{
	snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
	atomic_dec(&substream->runtime->mmap_count);
}

/* mmap for io-memory area */
#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
#define SNDRV_PCM_INFO_MMAP_IOMEM	SNDRV_PCM_INFO_MMAP
int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
#else
#define SNDRV_PCM_INFO_MMAP_IOMEM	0
#define snd_pcm_lib_mmap_iomem	NULL
#endif

static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
{
	*max = dma < 4 ? 64 * 1024 : 128 * 1024;
}

/*
 *  Misc
 */

#define SNDRV_PCM_DEFAULT_CON_SPDIF	(IEC958_AES0_CON_EMPHASIS_NONE|\
					 (IEC958_AES1_CON_ORIGINAL<<8)|\
					 (IEC958_AES1_CON_PCM_CODER<<8)|\
					 (IEC958_AES3_CON_FS_48000<<24))

#endif /* __SOUND_PCM_H */