source: GPL/alsa-kernel/include/sound/pcm.old@ 1

Last change on this file since 1 was 1, checked in by vladest, 20 years ago

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1#ifndef __SOUND_PCM_H
2#define __SOUND_PCM_H
3
4/*
5 * Digital Audio (PCM) abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
7 * Abramo Bagnara <abramo@alsa-project.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/asound.h>
27#include <sound/memalloc.h>
28
29typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
30typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
31typedef enum sndrv_pcm_class snd_pcm_class_t;
32typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
33typedef enum sndrv_pcm_stream snd_pcm_stream_t;
34typedef enum sndrv_pcm_access snd_pcm_access_t;
35typedef enum sndrv_pcm_format snd_pcm_format_t;
36typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
37typedef enum sndrv_pcm_state snd_pcm_state_t;
38typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
39typedef struct sndrv_pcm_info snd_pcm_info_t;
40typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
41typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
42#ifndef TARGET_OS2
43typedef enum sndrv_pcm_start snd_pcm_start_t;
44typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
45#endif
46typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
47typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
48typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
49typedef struct sndrv_pcm_status snd_pcm_status_t;
50typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
51typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
52typedef struct sndrv_mask snd_mask_t;
53typedef struct snd_sg_buf snd_pcm_sgbuf_t;
54
55#define snd_pcm_substream_chip(substream) ((substream)->private_data)
56#define snd_pcm_chip(pcm) ((pcm)->private_data)
57
58typedef struct _snd_pcm_file snd_pcm_file_t;
59typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
60
61#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
62#include "pcm_oss.h"
63#endif
64
65/*
66 * Hardware (lowlevel) section
67 */
68
69typedef struct _snd_pcm_hardware {
70 unsigned int info; /* SNDRV_PCM_INFO_* */
71 u64 formats; /* SNDRV_PCM_FMTBIT_* */
72 unsigned int rates; /* SNDRV_PCM_RATE_* */
73 unsigned int rate_min; /* min rate */
74 unsigned int rate_max; /* max rate */
75 unsigned int channels_min; /* min channels */
76 unsigned int channels_max; /* max channels */
77 size_t buffer_bytes_max; /* max buffer size */
78 size_t period_bytes_min; /* min period size */
79 size_t period_bytes_max; /* max period size */
80 unsigned int periods_min; /* min # of periods */
81 unsigned int periods_max; /* max # of periods */
82 size_t fifo_size; /* fifo size in bytes */
83} snd_pcm_hardware_t;
84
85typedef struct _snd_pcm_ops {
86 int (*open)(snd_pcm_substream_t *substream);
87 int (*close)(snd_pcm_substream_t *substream);
88 int (*ioctl)(snd_pcm_substream_t * substream,
89 unsigned int cmd, void *arg);
90 int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
91 int (*hw_free)(snd_pcm_substream_t *substream);
92 int (*prepare)(snd_pcm_substream_t * substream);
93 int (*trigger)(snd_pcm_substream_t * substream, int cmd);
94 snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
95 int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
96 void *buf, snd_pcm_uframes_t count);
97 int (*silence)(snd_pcm_substream_t *substream, int channel,
98 snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
99 struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
100 int (*ack)(snd_pcm_substream_t *substream);
101} snd_pcm_ops_t;
102
103/*
104 *
105 */
106
107#define SNDRV_PCM_DEVICES 8
108
109#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
110#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
111
112#define SNDRV_PCM_IOCTL1_RESET 0
113#define SNDRV_PCM_IOCTL1_INFO 1
114#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
115#define SNDRV_PCM_IOCTL1_GSTATE 3
116
117#define SNDRV_PCM_TRIGGER_STOP 0
118#define SNDRV_PCM_TRIGGER_START 1
119#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
120#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
121#define SNDRV_PCM_TRIGGER_SUSPEND 5
122#define SNDRV_PCM_TRIGGER_RESUME 6
123
124#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
125
126/* If you change this don't forget to change rates[] table in pcm_native.c */
127#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
128#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
129#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
130#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
131#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
132#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
133#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
134#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
135#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
136#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
137#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
138#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
139#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
140
141#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
142#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
143
144#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
145 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
146 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
147#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
148#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
149 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
150#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
151 SNDRV_PCM_RATE_192000)
152#define SNDRV_PCM_FMTBIT_S8 (1 << SNDRV_PCM_FORMAT_S8)
153#define SNDRV_PCM_FMTBIT_U8 (1 << SNDRV_PCM_FORMAT_U8)
154#define SNDRV_PCM_FMTBIT_S16_LE (1 << SNDRV_PCM_FORMAT_S16_LE)
155#define SNDRV_PCM_FMTBIT_S16_BE (1 << SNDRV_PCM_FORMAT_S16_BE)
156#define SNDRV_PCM_FMTBIT_U16_LE (1 << SNDRV_PCM_FORMAT_U16_LE)
157#define SNDRV_PCM_FMTBIT_U16_BE (1 << SNDRV_PCM_FORMAT_U16_BE)
158#define SNDRV_PCM_FMTBIT_S24_LE (1 << SNDRV_PCM_FORMAT_S24_LE)
159#define SNDRV_PCM_FMTBIT_S24_BE (1 << SNDRV_PCM_FORMAT_S24_BE)
160#define SNDRV_PCM_FMTBIT_U24_LE (1 << SNDRV_PCM_FORMAT_U24_LE)
161#define SNDRV_PCM_FMTBIT_U24_BE (1 << SNDRV_PCM_FORMAT_U24_BE)
162#define SNDRV_PCM_FMTBIT_S32_LE (1 << SNDRV_PCM_FORMAT_S32_LE)
163#define SNDRV_PCM_FMTBIT_S32_BE (1 << SNDRV_PCM_FORMAT_S32_BE)
164#define SNDRV_PCM_FMTBIT_U32_LE (1 << SNDRV_PCM_FORMAT_U32_LE)
165#define SNDRV_PCM_FMTBIT_U32_BE (1 << SNDRV_PCM_FORMAT_U32_BE)
166#define SNDRV_PCM_FMTBIT_FLOAT_LE (1 << SNDRV_PCM_FORMAT_FLOAT_LE)
167#define SNDRV_PCM_FMTBIT_FLOAT_BE (1 << SNDRV_PCM_FORMAT_FLOAT_BE)
168#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1 << SNDRV_PCM_FORMAT_FLOAT64_LE)
169#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1 << SNDRV_PCM_FORMAT_FLOAT64_BE)
170#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1 << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
171#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1 << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
172#define SNDRV_PCM_FMTBIT_MU_LAW (1 << SNDRV_PCM_FORMAT_MU_LAW)
173#define SNDRV_PCM_FMTBIT_A_LAW (1 << SNDRV_PCM_FORMAT_A_LAW)
174#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1 << SNDRV_PCM_FORMAT_IMA_ADPCM)
175#define SNDRV_PCM_FMTBIT_MPEG (1 << SNDRV_PCM_FORMAT_MPEG)
176#define SNDRV_PCM_FMTBIT_GSM (1 << SNDRV_PCM_FORMAT_GSM)
177#define SNDRV_PCM_FMTBIT_SPECIAL (1 << SNDRV_PCM_FORMAT_SPECIAL)
178#define SNDRV_PCM_FMTBIT_S24_3LE (1 << SNDRV_PCM_FORMAT_S24_3LE)
179#define SNDRV_PCM_FMTBIT_U24_3LE (1 << SNDRV_PCM_FORMAT_U24_3LE)
180#define SNDRV_PCM_FMTBIT_S24_3BE (1 << SNDRV_PCM_FORMAT_S24_3BE)
181#define SNDRV_PCM_FMTBIT_U24_3BE (1 << SNDRV_PCM_FORMAT_U24_3BE)
182#define SNDRV_PCM_FMTBIT_S20_3LE (1 << SNDRV_PCM_FORMAT_S20_3LE)
183#define SNDRV_PCM_FMTBIT_U20_3LE (1 << SNDRV_PCM_FORMAT_U20_3LE)
184#define SNDRV_PCM_FMTBIT_S20_3BE (1 << SNDRV_PCM_FORMAT_S20_3BE)
185#define SNDRV_PCM_FMTBIT_U20_3BE (1 << SNDRV_PCM_FORMAT_U20_3BE)
186#define SNDRV_PCM_FMTBIT_S18_3LE (1 << SNDRV_PCM_FORMAT_S18_3LE)
187#define SNDRV_PCM_FMTBIT_U18_3LE (1 << SNDRV_PCM_FORMAT_U18_3LE)
188#define SNDRV_PCM_FMTBIT_S18_3BE (1 << SNDRV_PCM_FORMAT_S18_3BE)
189#define SNDRV_PCM_FMTBIT_U18_3BE (1 << SNDRV_PCM_FORMAT_U18_3BE)
190
191#ifdef SNDRV_LITTLE_ENDIAN
192#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
193#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
194#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
195#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
196#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
197#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
198#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
199#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
200#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
201#endif
202#ifdef SNDRV_BIG_ENDIAN
203#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
204#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
205#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
206#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
207#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
208#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
209#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
210#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
211#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
212#endif
213
214struct _snd_pcm_file {
215 snd_pcm_substream_t * substream;
216 struct _snd_pcm_file * next;
217};
218
219typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
220
221typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
222 snd_pcm_hw_rule_t *rule);
223
224struct _snd_pcm_hw_rule {
225 unsigned int cond;
226 snd_pcm_hw_rule_func_t func;
227 int var;
228 int deps[4];
229 void *private;
230};
231
232typedef struct _snd_pcm_hw_constraints {
233 snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
234 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
235 snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
236 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
237 unsigned int rules_num;
238 unsigned int rules_all;
239 snd_pcm_hw_rule_t *rules;
240} snd_pcm_hw_constraints_t;
241
242static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
243 snd_pcm_hw_param_t var)
244{
245 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
246}
247
248static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
249 snd_pcm_hw_param_t var)
250{
251 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
252}
253
254typedef struct {
255 unsigned int num;
256 unsigned int den_min, den_max, den_step;
257} ratnum_t;
258
259typedef struct {
260 unsigned int num_min, num_max, num_step;
261 unsigned int den;
262} ratden_t;
263
264typedef struct {
265 int nrats;
266 ratnum_t *rats;
267} snd_pcm_hw_constraint_ratnums_t;
268
269typedef struct {
270 int nrats;
271 ratden_t *rats;
272} snd_pcm_hw_constraint_ratdens_t;
273
274typedef struct {
275 unsigned int count;
276 unsigned int *list;
277 unsigned int mask;
278} snd_pcm_hw_constraint_list_t;
279
280struct _snd_pcm_runtime {
281 /* -- Status -- */
282 snd_pcm_substream_t *trigger_master;
283 snd_timestamp_t trigger_tstamp; /* trigger timestamp */
284 int overrange;
285 snd_pcm_uframes_t avail_max;
286 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
287 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
288
289 /* -- HW params -- */
290 snd_pcm_access_t access; /* access mode */
291 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
292 snd_pcm_subformat_t subformat; /* subformat */
293 unsigned int rate; /* rate in Hz */
294 unsigned int channels; /* channels */
295 snd_pcm_uframes_t period_size; /* period size */
296 unsigned int periods; /* periods */
297 snd_pcm_uframes_t buffer_size; /* buffer size */
298 unsigned int tick_time; /* tick time */
299 snd_pcm_uframes_t min_align; /* Min alignment for the format */
300 size_t byte_align;
301 unsigned int frame_bits;
302 unsigned int sample_bits;
303 unsigned int info;
304 unsigned int rate_num;
305 unsigned int rate_den;
306
307 /* -- SW params -- */
308 int tstamp_timespec; /* use timeval (0) or timespec (1) */
309 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */
310 unsigned int period_step;
311 unsigned int sleep_min; /* min ticks to sleep */
312 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
313 snd_pcm_uframes_t start_threshold;
314 snd_pcm_uframes_t stop_threshold;
315 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
316 noise is nearest than this */
317 snd_pcm_uframes_t silence_size; /* Silence filling size */
318 snd_pcm_uframes_t boundary; /* pointers wrap point */
319
320 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
321 snd_pcm_uframes_t silence_filled; /* size filled with silence */
322
323 snd_pcm_sync_id_t sync; /* hardware synchronization ID */
324
325 /* -- mmap -- */
326 volatile snd_pcm_mmap_status_t *status;
327 volatile snd_pcm_mmap_control_t *control;
328 atomic_t mmap_count;
329
330 /* -- locking / scheduling -- */
331 wait_queue_head_t sleep;
332 struct timer_list tick_timer;
333 struct fasync_struct *fasync;
334
335 /* -- private section -- */
336 void *private_data;
337 void (*private_free)(snd_pcm_runtime_t *runtime);
338
339 /* -- hardware description -- */
340 snd_pcm_hardware_t hw;
341 snd_pcm_hw_constraints_t hw_constraints;
342
343 /* -- interrupt callbacks -- */
344 void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
345 void (*transfer_ack_end)(snd_pcm_substream_t *substream);
346
347 /* -- timer -- */
348 unsigned int timer_resolution; /* timer resolution */
349
350 /* -- DMA -- */
351 unsigned char *dma_area; /* DMA area */
352 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
353 size_t dma_bytes; /* size of DMA area */
354 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
355
356#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
357 /* -- OSS things -- */
358 snd_pcm_oss_runtime_t oss;
359#endif
360};
361
362typedef struct _snd_pcm_group { /* keep linked substreams */
363 spinlock_t lock;
364 struct list_head substreams;
365 int count;
366} snd_pcm_group_t;
367
368struct _snd_pcm_substream {
369 snd_pcm_t *pcm;
370 snd_pcm_str_t *pstr;
371 void *private_data; /* copied from pcm->private_data */
372 int number;
373 char name[32]; /* substream name */
374 int stream; /* stream (direction) */
375 size_t buffer_bytes_max; /* limit ring buffer size */
376 struct snd_dma_buffer dma_buffer;
377 unsigned int dma_buf_id;
378 size_t dma_max;
379 /* -- hardware operations -- */
380 snd_pcm_ops_t *ops;
381 /* -- runtime information -- */
382 snd_pcm_runtime_t *runtime;
383 /* -- timer section -- */
384 snd_timer_t *timer; /* timer */
385 int timer_running: 1; /* time is running */
386 spinlock_t timer_lock;
387 /* -- next substream -- */
388 snd_pcm_substream_t *next;
389 /* -- linked substreams -- */
390 struct list_head link_list; /* linked list member */
391 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */
392 snd_pcm_group_t *group; /* pointer to current group */
393 /* -- assigned files -- */
394 snd_pcm_file_t *file;
395 struct file *ffile;
396#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
397 /* -- OSS things -- */
398 snd_pcm_oss_substream_t oss;
399#endif
400 snd_info_entry_t *proc_root;
401 snd_info_entry_t *proc_info_entry;
402 snd_info_entry_t *proc_hw_params_entry;
403 snd_info_entry_t *proc_sw_params_entry;
404 snd_info_entry_t *proc_status_entry;
405 snd_info_entry_t *proc_prealloc_entry;
406};
407
408#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
409#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
410#else
411#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
412#endif
413
414
415struct _snd_pcm_str {
416 int stream; /* stream (direction) */
417 snd_pcm_t *pcm;
418 /* -- substreams -- */
419 unsigned int substream_count;
420 unsigned int substream_opened;
421 snd_pcm_substream_t *substream;
422#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
423 /* -- OSS things -- */
424 snd_pcm_oss_stream_t oss;
425#endif
426 snd_pcm_file_t *files;
427 snd_minor_t *reg;
428 snd_info_entry_t *proc_root;
429 snd_info_entry_t *proc_info_entry;
430};
431
432struct _snd_pcm {
433 snd_card_t *card;
434 unsigned int device; /* device number */
435 unsigned int info_flags;
436 unsigned short dev_class;
437 unsigned short dev_subclass;
438 char id[64];
439 char name[80];
440 snd_pcm_str_t streams[2];
441 struct semaphore open_mutex;
442 wait_queue_head_t open_wait;
443 void *private_data;
444 void (*private_free) (snd_pcm_t *pcm);
445#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
446 snd_pcm_oss_t oss;
447#endif
448};
449
450typedef struct _snd_pcm_notify {
451 int (*n_register) (snd_pcm_t * pcm);
452 int (*n_disconnect) (snd_pcm_t * pcm);
453 int (*n_unregister) (snd_pcm_t * pcm);
454 struct list_head list;
455} snd_pcm_notify_t;
456
457/*
458 * Registering
459 */
460
461extern snd_pcm_t *snd_pcm_devices[];
462extern snd_minor_t snd_pcm_reg[2];
463
464int snd_pcm_new(snd_card_t * card, char *id, int device,
465 int playback_count, int capture_count,
466 snd_pcm_t **rpcm);
467int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
468
469int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
470
471/*
472 * Native I/O
473 */
474
475extern rwlock_t snd_pcm_link_rwlock;
476
477int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
478int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
479int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
480int snd_pcm_prepare(snd_pcm_substream_t *substream);
481int snd_pcm_start(snd_pcm_substream_t *substream);
482int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
483int snd_pcm_drain_done(snd_pcm_substream_t *substream);
484#ifdef CONFIG_PM
485int snd_pcm_suspend(snd_pcm_substream_t *substream);
486int snd_pcm_suspend_all(snd_pcm_t *pcm);
487#endif
488int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
489int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
490int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
491int snd_pcm_open(struct inode *inode, struct file *file);
492int snd_pcm_release(struct inode *inode, struct file *file);
493unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait);
494unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait);
495int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
496void snd_pcm_release_substream(snd_pcm_substream_t *substream);
497void snd_pcm_vma_notify_data(void *client, void *data);
498int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
499
500#if BITS_PER_LONG >= 64
501
502static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
503{
504 *rem = *n % div;
505 *n /= div;
506}
507
508#elif defined(i386)
509
510static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
511{
512 u_int32_t low, high;
513 low = *n & 0xffffffff;
514 high = *n >> 32;
515 if (high) {
516 u_int32_t high1 = high % div;
517 high /= div;
518 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
519 *n = (u_int64_t)high << 32 | low;
520 } else {
521 *n = low / div;
522 *rem = low % div;
523 }
524}
525#else
526
527static inline void divl(u_int32_t high, u_int32_t low,
528 u_int32_t div,
529 u_int32_t *q, u_int32_t *r)
530{
531 u_int64_t n = (u_int64_t)high << 32 | low;
532 u_int64_t d = (u_int64_t)div << 31;
533 u_int32_t q1 = 0;
534 int c = 32;
535 while (n > 0xffffffffU) {
536 q1 <<= 1;
537 if (n >= d) {
538 n -= d;
539 q1 |= 1;
540 }
541 d >>= 1;
542 c--;
543 }
544 q1 <<= c;
545 if (n) {
546 low = n;
547 *q = q1 | (low / div);
548 *r = low % div;
549 } else {
550 *r = 0;
551 *q = q1;
552 }
553 return;
554}
555
556static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
557{
558 u_int32_t low, high;
559 low = *n & 0xffffffff;
560 high = *n >> 32;
561 if (high) {
562 u_int32_t high1 = high % div;
563 u_int32_t low1 = low;
564 high /= div;
565 divl(high1, low1, div, &low, rem);
566 *n = (u_int64_t)high << 32 | low;
567 } else {
568 *n = low / div;
569 *rem = low % div;
570 }
571}
572#endif
573
574/*
575 * PCM library
576 */
577
578static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
579{
580 return substream->group != &substream->self_group;
581}
582
583static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
584{
585 read_lock(&snd_pcm_link_rwlock);
586 spin_lock(&substream->self_group.lock);
587}
588
589static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
590{
591 spin_unlock(&substream->self_group.lock);
592 read_unlock(&snd_pcm_link_rwlock);
593}
594
595static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
596{
597 read_lock_irq(&snd_pcm_link_rwlock);
598 spin_lock(&substream->self_group.lock);
599}
600
601static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
602{
603 spin_unlock(&substream->self_group.lock);
604 read_unlock_irq(&snd_pcm_link_rwlock);
605}
606
607#define snd_pcm_stream_lock_irqsave(substream, flags) \
608do { \
609 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
610 spin_lock(&substream->self_group.lock); \
611} while (0)
612
613#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
614do { \
615 spin_unlock(&substream->self_group.lock); \
616 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
617} while (0)
618
619#define snd_pcm_group_for_each(pos, substream) \
620 list_for_each(pos, &substream->group->substreams)
621
622#define snd_pcm_group_substream_entry(pos) \
623 list_entry(pos, snd_pcm_substream_t, link_list)
624
625static inline int snd_pcm_running(snd_pcm_substream_t *substream)
626{
627 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
628 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
629 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
630}
631
632static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
633{
634 return size * 8 / runtime->sample_bits;
635}
636
637static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
638{
639 return size * 8 / runtime->frame_bits;
640}
641
642static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
643{
644 return size * runtime->sample_bits / 8;
645}
646
647static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
648{
649 return size * runtime->frame_bits / 8;
650}
651
652static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
653{
654 return bytes % runtime->byte_align == 0;
655}
656
657static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
658{
659 snd_pcm_runtime_t *runtime = substream->runtime;
660 return frames_to_bytes(runtime, runtime->buffer_size);
661}
662
663static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
664{
665 snd_pcm_runtime_t *runtime = substream->runtime;
666 return frames_to_bytes(runtime, runtime->period_size);
667}
668
669/*
670 * result is: 0 ... (boundary - 1)
671 */
672static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
673{
674 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
675 if (avail < 0)
676 avail += runtime->boundary;
677 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
678 avail -= runtime->boundary;
679 return avail;
680}
681
682/*
683 * result is: 0 ... (boundary - 1)
684 */
685static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
686{
687 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
688 if (avail < 0)
689 avail += runtime->boundary;
690 return avail;
691}
692
693static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
694{
695 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
696}
697
698static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
699{
700 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
701}
702
703static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
704 snd_pcm_substream_t *master)
705{
706 substream->runtime->trigger_master = master;
707}
708
709static inline int hw_is_mask(int var)
710{
711 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
712 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
713}
714
715static inline int hw_is_interval(int var)
716{
717 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
718 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
719}
720
721static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
722 snd_pcm_hw_param_t var)
723{
724 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
725}
726
727static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
728 snd_pcm_hw_param_t var)
729{
730 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
731}
732
733static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
734 snd_pcm_hw_param_t var)
735{
736 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
737}
738
739static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
740 snd_pcm_hw_param_t var)
741{
742 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
743}
744
745#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
746#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
747#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
748#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
749#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
750#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
751#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
752#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
753#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
754#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
755#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
756
757
758int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
759void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
760void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
761void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
762 unsigned int k, snd_interval_t *c);
763void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
764 const snd_interval_t *b, snd_interval_t *c);
765int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
766int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int step);
767int snd_interval_ratnum(snd_interval_t *i,
768 unsigned int rats_count, ratnum_t *rats,
769 unsigned int *nump, unsigned int *denp);
770int snd_interval_ratden(snd_interval_t *i,
771 unsigned int rats_count, ratden_t *rats,
772 unsigned int *nump, unsigned int *denp);
773
774void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
775void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
776int snd_pcm_hw_param_min(snd_pcm_substream_t *substream,
777 snd_pcm_hw_params_t *params,
778 snd_pcm_hw_param_t var,
779 unsigned int val, int *dir);
780int snd_pcm_hw_param_max(snd_pcm_substream_t *substream,
781 snd_pcm_hw_params_t *params,
782 snd_pcm_hw_param_t var,
783 unsigned int val, int *dir);
784int snd_pcm_hw_param_setinteger(snd_pcm_substream_t *substream,
785 snd_pcm_hw_params_t *params,
786 snd_pcm_hw_param_t var);
787int snd_pcm_hw_param_first(snd_pcm_substream_t *substream,
788 snd_pcm_hw_params_t *params,
789 snd_pcm_hw_param_t var, int *dir);
790int snd_pcm_hw_param_last(snd_pcm_substream_t *substream,
791 snd_pcm_hw_params_t *params,
792 snd_pcm_hw_param_t var, int *dir);
793int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
794 snd_pcm_hw_params_t *params,
795 snd_pcm_hw_param_t var,
796 unsigned int val, int *dir);
797int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
798 snd_pcm_hw_params_t *params,
799 snd_pcm_hw_param_t var,
800 unsigned int val, int dir);
801int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
802
803int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
804
805int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
806int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
807
808int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
809 u_int32_t mask);
810int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
811 u_int64_t mask);
812int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
813 unsigned int min, unsigned int max);
814int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
815int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
816 unsigned int cond,
817 snd_pcm_hw_param_t var,
818 snd_pcm_hw_constraint_list_t *l);
819int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
820 unsigned int cond,
821 snd_pcm_hw_param_t var,
822 snd_pcm_hw_constraint_ratnums_t *r);
823int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
824 unsigned int cond,
825 snd_pcm_hw_param_t var,
826 snd_pcm_hw_constraint_ratdens_t *r);
827int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
828 unsigned int cond,
829 unsigned int width,
830 unsigned int msbits);
831int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
832 unsigned int cond,
833 snd_pcm_hw_param_t var,
834 unsigned long step);
835int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
836 unsigned int cond,
837 snd_pcm_hw_param_t var);
838int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
839 unsigned int cond,
840 int var,
841 snd_pcm_hw_rule_func_t func, void *private,
842 int dep, ...);
843
844int snd_pcm_format_signed(snd_pcm_format_t format);
845int snd_pcm_format_unsigned(snd_pcm_format_t format);
846int snd_pcm_format_linear(snd_pcm_format_t format);
847int snd_pcm_format_little_endian(snd_pcm_format_t format);
848int snd_pcm_format_big_endian(snd_pcm_format_t format);
849int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
850int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
851u_int64_t snd_pcm_format_silence_64(snd_pcm_format_t format);
852int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
853snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
854ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
855const char *snd_pcm_format_name(snd_pcm_format_t format);
856const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat);
857
858void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
859void snd_pcm_set_sync(snd_pcm_substream_t * substream);
860int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
861int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
862 unsigned int cmd, void *arg);
863int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
864int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
865int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
866int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
867int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
868void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
869int snd_pcm_playback_ready(snd_pcm_substream_t *substream);
870int snd_pcm_capture_ready(snd_pcm_substream_t *substream);
871long snd_pcm_playback_ready_jiffies(snd_pcm_substream_t *substream);
872long snd_pcm_capture_ready_jiffies(snd_pcm_substream_t *substream);
873int snd_pcm_playback_data(snd_pcm_substream_t *substream);
874int snd_pcm_playback_empty(snd_pcm_substream_t *substream);
875int snd_pcm_capture_empty(snd_pcm_substream_t *substream);
876void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
877void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
878void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
879void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
880snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
881 const void *buf, snd_pcm_uframes_t frames);
882snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
883 void *buf, snd_pcm_uframes_t frames);
884snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
885 void **bufs, snd_pcm_uframes_t frames);
886snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
887 void **bufs, snd_pcm_uframes_t frames);
888int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
889
890static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
891 struct snd_dma_buffer *bufp)
892{
893 snd_pcm_runtime_t *runtime = substream->runtime;
894 if (bufp) {
895 runtime->dma_buffer_p = bufp;
896 runtime->dma_area = bufp->area;
897 runtime->dma_addr = bufp->addr;
898 runtime->dma_bytes = bufp->bytes;
899 } else {
900 runtime->dma_buffer_p = NULL;
901 runtime->dma_area = NULL;
902 runtime->dma_addr = 0;
903 runtime->dma_bytes = 0;
904 }
905}
906/*
907 * Timer interface
908 */
909
910void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
911void snd_pcm_timer_init(snd_pcm_substream_t * substream);
912void snd_pcm_timer_done(snd_pcm_substream_t * substream);
913
914/*
915 * Memory
916 */
917
918int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
919int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
920int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
921 int type, struct device *data,
922 size_t size, size_t max);
923int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
924 int type, void *data,
925 size_t size, size_t max);
926int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
927int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
928
929#ifdef CONFIG_ISA
930int snd_pcm_lib_preallocate_isa_pages(snd_pcm_substream_t *substream,
931 size_t size, size_t max);
932int snd_pcm_lib_preallocate_isa_pages_for_all(snd_pcm_t *pcm,
933 size_t size, size_t max);
934#endif
935#ifdef CONFIG_PCI
936int snd_pcm_lib_preallocate_pci_pages(struct pci_dev *pci,
937 snd_pcm_substream_t *substream,
938 size_t size, size_t max);
939int snd_pcm_lib_preallocate_pci_pages_for_all(struct pci_dev *pci,
940 snd_pcm_t *pcm,
941 size_t size,
942 size_t max);
943int snd_pcm_lib_preallocate_sg_pages(struct pci_dev *pci,
944 snd_pcm_substream_t *substream,
945 size_t size, size_t max);
946int snd_pcm_lib_preallocate_sg_pages_for_all(struct pci_dev *pci,
947 snd_pcm_t *pcm,
948 size_t size, size_t max);
949#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
950#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
951#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
952struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
953#endif
954
955#ifdef CONFIG_SBUS
956int snd_pcm_lib_preallocate_sbus_pages(struct sbus_dev *sdev,
957 snd_pcm_substream_t *substream,
958 size_t size, size_t max);
959int snd_pcm_lib_preallocate_sbus_pages_for_all(struct sbus_dev *sdev,
960 snd_pcm_t *pcm,
961 size_t size,
962 size_t max);
963#endif
964
965static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
966{
967 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
968}
969
970/*
971 * Misc
972 */
973
974#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
975 (IEC958_AES1_CON_ORIGINAL<<8)|\
976 (IEC958_AES1_CON_PCM_CODER<<8)|\
977 (IEC958_AES3_CON_FS_48000<<24))
978
979#define snd_pcm_group_for_each(pos, substream) \
980 list_for_each(pos, &substream->group->substreams)
981
982#define snd_pcm_group_substream_entry(pos) \
983 list_entry(pos, snd_pcm_substream_t, link_list)
984
985
986
987#endif /* __SOUND_PCM_H */
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