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[ALSA] sound/core/: possible cleanups
[deliverable/linux.git] / include / sound / pcm.h
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1da177e4
LT		 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#include <linux/poll.h>
29#include <linux/bitops.h>
30
31typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
32typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
33typedef enum sndrv_pcm_class snd_pcm_class_t;
34typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
35typedef enum sndrv_pcm_stream snd_pcm_stream_t;
36typedef enum sndrv_pcm_access snd_pcm_access_t;
37typedef enum sndrv_pcm_format snd_pcm_format_t;
38typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
39typedef enum sndrv_pcm_state snd_pcm_state_t;
40typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
41typedef struct sndrv_pcm_info snd_pcm_info_t;
42typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
43typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
44typedef enum sndrv_pcm_start snd_pcm_start_t;
45typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
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 __user *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 (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
101 int (*ack)(snd_pcm_substream_t *substream);
102} snd_pcm_ops_t;
103
104/*
105 *
106 */
107
108#define SNDRV_PCM_DEVICES 8
109
110#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
111#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
112
113#define SNDRV_PCM_IOCTL1_RESET 0
114#define SNDRV_PCM_IOCTL1_INFO 1
115#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
116#define SNDRV_PCM_IOCTL1_GSTATE 3
117
118#define SNDRV_PCM_TRIGGER_STOP 0
119#define SNDRV_PCM_TRIGGER_START 1
120#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
121#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
122#define SNDRV_PCM_TRIGGER_SUSPEND 5
123#define SNDRV_PCM_TRIGGER_RESUME 6
124
125#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
126
127/* If you change this don't forget to change rates[] table in pcm_native.c */
128#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
129#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
130#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
131#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
132#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
133#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
134#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
135#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
136#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
137#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
138#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
139#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
140#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
141
142#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
143#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
144
145#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
146 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
147 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
148#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
149#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
150 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
151#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
152 SNDRV_PCM_RATE_192000)
153#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
154#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
155#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
156#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
157#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
158#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
159#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
160#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
161#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
162#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
163#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
164#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
165#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
166#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
167#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
168#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
169#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
170#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
171#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
172#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
173#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
174#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
175#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
176#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
177#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
178#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
179#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
180#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
181#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
182#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
183#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
184#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
185#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
186#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
187#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
188#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
189#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
190#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
191
192#ifdef SNDRV_LITTLE_ENDIAN
193#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
194#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
195#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
196#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
197#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
198#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
199#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
200#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
201#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
202#endif
203#ifdef SNDRV_BIG_ENDIAN
204#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
205#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
206#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
207#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
208#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
209#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
210#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
211#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
212#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
213#endif
214
215struct _snd_pcm_file {
216 snd_pcm_substream_t * substream;
217 struct _snd_pcm_file * next;
218};
219
220typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
221
222typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
223 snd_pcm_hw_rule_t *rule);
224
225struct _snd_pcm_hw_rule {
226 unsigned int cond;
227 snd_pcm_hw_rule_func_t func;
228 int var;
229 int deps[4];
230 void *private;
231};
232
233typedef struct _snd_pcm_hw_constraints {
234 snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
235 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
236 snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
237 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
238 unsigned int rules_num;
239 unsigned int rules_all;
240 snd_pcm_hw_rule_t *rules;
241} snd_pcm_hw_constraints_t;
242
243static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
244 snd_pcm_hw_param_t var)
245{
246 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
247}
248
249static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
250 snd_pcm_hw_param_t var)
251{
252 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
253}
254
255typedef struct {
256 unsigned int num;
257 unsigned int den_min, den_max, den_step;
258} ratnum_t;
259
260typedef struct {
261 unsigned int num_min, num_max, num_step;
262 unsigned int den;
263} ratden_t;
264
265typedef struct {
266 int nrats;
267 ratnum_t *rats;
268} snd_pcm_hw_constraint_ratnums_t;
269
270typedef struct {
271 int nrats;
272 ratden_t *rats;
273} snd_pcm_hw_constraint_ratdens_t;
274
275typedef struct {
276 unsigned int count;
277 unsigned int *list;
278 unsigned int mask;
279} snd_pcm_hw_constraint_list_t;
280
281struct _snd_pcm_runtime {
282 /* -- Status -- */
283 snd_pcm_substream_t *trigger_master;
284 snd_timestamp_t trigger_tstamp; /* trigger timestamp */
285 int overrange;
286 snd_pcm_uframes_t avail_max;
287 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
288 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
289
290 /* -- HW params -- */
291 snd_pcm_access_t access; /* access mode */
292 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
293 snd_pcm_subformat_t subformat; /* subformat */
294 unsigned int rate; /* rate in Hz */
295 unsigned int channels; /* channels */
296 snd_pcm_uframes_t period_size; /* period size */
297 unsigned int periods; /* periods */
298 snd_pcm_uframes_t buffer_size; /* buffer size */
299 unsigned int tick_time; /* tick time */
300 snd_pcm_uframes_t min_align; /* Min alignment for the format */
301 size_t byte_align;
302 unsigned int frame_bits;
303 unsigned int sample_bits;
304 unsigned int info;
305 unsigned int rate_num;
306 unsigned int rate_den;
307
308 /* -- SW params -- */
309 int tstamp_timespec; /* use timeval (0) or timespec (1) */
310 snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */
311 unsigned int period_step;
312 unsigned int sleep_min; /* min ticks to sleep */
313 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
314 snd_pcm_uframes_t start_threshold;
315 snd_pcm_uframes_t stop_threshold;
316 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
317 noise is nearest than this */
318 snd_pcm_uframes_t silence_size; /* Silence filling size */
319 snd_pcm_uframes_t boundary; /* pointers wrap point */
320
321 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
322 snd_pcm_uframes_t silence_filled; /* size filled with silence */
323
324 snd_pcm_sync_id_t sync; /* hardware synchronization ID */
325
326 /* -- mmap -- */
327 volatile snd_pcm_mmap_status_t *status;
328 volatile snd_pcm_mmap_control_t *control;
329 atomic_t mmap_count;
330
331 /* -- locking / scheduling -- */
332 wait_queue_head_t sleep;
333 struct timer_list tick_timer;
334 struct fasync_struct *fasync;
335
336 /* -- private section -- */
337 void *private_data;
338 void (*private_free)(snd_pcm_runtime_t *runtime);
339
340 /* -- hardware description -- */
341 snd_pcm_hardware_t hw;
342 snd_pcm_hw_constraints_t hw_constraints;
343
344 /* -- interrupt callbacks -- */
345 void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
346 void (*transfer_ack_end)(snd_pcm_substream_t *substream);
347
348 /* -- timer -- */
349 unsigned int timer_resolution; /* timer resolution */
350
351 /* -- DMA -- */
352 unsigned char *dma_area; /* DMA area */
353 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
354 size_t dma_bytes; /* size of DMA area */
355
356 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
357
358#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
359 /* -- OSS things -- */
360 snd_pcm_oss_runtime_t oss;
361#endif
362};
363
364typedef struct _snd_pcm_group { /* keep linked substreams */
365 spinlock_t lock;
366 struct list_head substreams;
367 int count;
368} snd_pcm_group_t;
369
370struct _snd_pcm_substream {
371 snd_pcm_t *pcm;
372 snd_pcm_str_t *pstr;
373 void *private_data; /* copied from pcm->private_data */
374 int number;
375 char name[32]; /* substream name */
376 int stream; /* stream (direction) */
377 size_t buffer_bytes_max; /* limit ring buffer size */
378 struct snd_dma_buffer dma_buffer;
379 unsigned int dma_buf_id;
380 size_t dma_max;
381 /* -- hardware operations -- */
382 unsigned int open_flag: 1; /* lowlevel device has been opened */
383 snd_pcm_ops_t *ops;
384 /* -- runtime information -- */
385 snd_pcm_runtime_t *runtime;
386 /* -- timer section -- */
387 snd_timer_t *timer; /* timer */
388 unsigned timer_running: 1; /* time is running */
389 spinlock_t timer_lock;
390 /* -- next substream -- */
391 snd_pcm_substream_t *next;
392 /* -- linked substreams -- */
393 struct list_head link_list; /* linked list member */
394 snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */
395 snd_pcm_group_t *group; /* pointer to current group */
396 /* -- assigned files -- */
397 snd_pcm_file_t *file;
398 struct file *ffile;
399#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
400 /* -- OSS things -- */
401 snd_pcm_oss_substream_t oss;
402#endif
403 snd_info_entry_t *proc_root;
404 snd_info_entry_t *proc_info_entry;
405 snd_info_entry_t *proc_hw_params_entry;
406 snd_info_entry_t *proc_sw_params_entry;
407 snd_info_entry_t *proc_status_entry;
408 snd_info_entry_t *proc_prealloc_entry;
409 /* misc flags */
410 unsigned int no_mmap_ctrl: 1;
411};
412
413#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
414#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
415#else
416#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
417#endif
418
419
420struct _snd_pcm_str {
421 int stream; /* stream (direction) */
422 snd_pcm_t *pcm;
423 /* -- substreams -- */
424 unsigned int substream_count;
425 unsigned int substream_opened;
426 snd_pcm_substream_t *substream;
427#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
428 /* -- OSS things -- */
429 snd_pcm_oss_stream_t oss;
430#endif
431 snd_pcm_file_t *files;
432 snd_minor_t *reg;
433 snd_info_entry_t *proc_root;
434 snd_info_entry_t *proc_info_entry;
435#ifdef CONFIG_SND_DEBUG
436 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
437 snd_info_entry_t *proc_xrun_debug_entry;
438#endif
439};
440
441struct _snd_pcm {
442 snd_card_t *card;
443 unsigned int device; /* device number */
444 unsigned int info_flags;
445 unsigned short dev_class;
446 unsigned short dev_subclass;
447 char id[64];
448 char name[80];
449 snd_pcm_str_t streams[2];
450 struct semaphore open_mutex;
451 wait_queue_head_t open_wait;
452 void *private_data;
453 void (*private_free) (snd_pcm_t *pcm);
454#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
455 snd_pcm_oss_t oss;
456#endif
457};
458
459typedef struct _snd_pcm_notify {
460 int (*n_register) (snd_pcm_t * pcm);
461 int (*n_disconnect) (snd_pcm_t * pcm);
462 int (*n_unregister) (snd_pcm_t * pcm);
463 struct list_head list;
464} snd_pcm_notify_t;
465
466/*
467 * Registering
468 */
469
470extern snd_pcm_t *snd_pcm_devices[];
471extern snd_minor_t snd_pcm_reg[2];
472
473int snd_pcm_new(snd_card_t * card, char *id, int device,
474 int playback_count, int capture_count,
475 snd_pcm_t **rpcm);
476int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
477
478int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
479
480/*
481 * Native I/O
482 */
483
484extern rwlock_t snd_pcm_link_rwlock;
485
486int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
487int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
488int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
489int snd_pcm_prepare(snd_pcm_substream_t *substream);
490int snd_pcm_start(snd_pcm_substream_t *substream);
491int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
492int snd_pcm_drain_done(snd_pcm_substream_t *substream);
493#ifdef CONFIG_PM
494int snd_pcm_suspend(snd_pcm_substream_t *substream);
495int snd_pcm_suspend_all(snd_pcm_t *pcm);
496#endif
497int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
498int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
499int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
500int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
501void snd_pcm_release_substream(snd_pcm_substream_t *substream);
502void snd_pcm_vma_notify_data(void *client, void *data);
503int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
504
505#if BITS_PER_LONG >= 64
506
507static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
508{
509 *rem = *n % div;
510 *n /= div;
511}
512
513#elif defined(i386)
514
515static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
516{
517 u_int32_t low, high;
518 low = *n & 0xffffffff;
519 high = *n >> 32;
520 if (high) {
521 u_int32_t high1 = high % div;
522 high /= div;
523 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
524 *n = (u_int64_t)high << 32 | low;
525 } else {
526 *n = low / div;
527 *rem = low % div;
528 }
529}
530#else
531
532static inline void divl(u_int32_t high, u_int32_t low,
533 u_int32_t div,
534 u_int32_t *q, u_int32_t *r)
535{
536 u_int64_t n = (u_int64_t)high << 32 | low;
537 u_int64_t d = (u_int64_t)div << 31;
538 u_int32_t q1 = 0;
539 int c = 32;
540 while (n > 0xffffffffU) {
541 q1 <<= 1;
542 if (n >= d) {
543 n -= d;
544 q1 |= 1;
545 }
546 d >>= 1;
547 c--;
548 }
549 q1 <<= c;
550 if (n) {
551 low = n;
552 *q = q1 | (low / div);
553 *r = low % div;
554 } else {
555 *r = 0;
556 *q = q1;
557 }
558 return;
559}
560
561static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
562{
563 u_int32_t low, high;
564 low = *n & 0xffffffff;
565 high = *n >> 32;
566 if (high) {
567 u_int32_t high1 = high % div;
568 u_int32_t low1 = low;
569 high /= div;
570 divl(high1, low1, div, &low, rem);
571 *n = (u_int64_t)high << 32 | low;
572 } else {
573 *n = low / div;
574 *rem = low % div;
575 }
576}
577#endif
578
579/*
580 * PCM library
581 */
582
583static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
584{
585 return substream->group != &substream->self_group;
586}
587
588static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
589{
590 read_lock(&snd_pcm_link_rwlock);
591 spin_lock(&substream->self_group.lock);
592}
593
594static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
595{
596 spin_unlock(&substream->self_group.lock);
597 read_unlock(&snd_pcm_link_rwlock);
598}
599
600static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
601{
602 read_lock_irq(&snd_pcm_link_rwlock);
603 spin_lock(&substream->self_group.lock);
604}
605
606static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
607{
608 spin_unlock(&substream->self_group.lock);
609 read_unlock_irq(&snd_pcm_link_rwlock);
610}
611
612#define snd_pcm_stream_lock_irqsave(substream, flags) \
613do { \
614 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
615 spin_lock(&substream->self_group.lock); \
616} while (0)
617
618#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
619do { \
620 spin_unlock(&substream->self_group.lock); \
621 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
622} while (0)
623
624#define snd_pcm_group_for_each(pos, substream) \
625 list_for_each(pos, &substream->group->substreams)
626
627#define snd_pcm_group_substream_entry(pos) \
628 list_entry(pos, snd_pcm_substream_t, link_list)
629
630static inline int snd_pcm_running(snd_pcm_substream_t *substream)
631{
632 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
633 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
634 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
635}
636
637static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
638{
639 return size * 8 / runtime->sample_bits;
640}
641
642static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
643{
644 return size * 8 / runtime->frame_bits;
645}
646
647static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
648{
649 return size * runtime->sample_bits / 8;
650}
651
652static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
653{
654 return size * runtime->frame_bits / 8;
655}
656
657static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
658{
659 return bytes % runtime->byte_align == 0;
660}
661
662static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
663{
664 snd_pcm_runtime_t *runtime = substream->runtime;
665 return frames_to_bytes(runtime, runtime->buffer_size);
666}
667
668static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
669{
670 snd_pcm_runtime_t *runtime = substream->runtime;
671 return frames_to_bytes(runtime, runtime->period_size);
672}
673
674/*
675 * result is: 0 ... (boundary - 1)
676 */
677static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
678{
679 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
680 if (avail < 0)
681 avail += runtime->boundary;
682 else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
683 avail -= runtime->boundary;
684 return avail;
685}
686
687/*
688 * result is: 0 ... (boundary - 1)
689 */
690static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
691{
692 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
693 if (avail < 0)
694 avail += runtime->boundary;
695 return avail;
696}
697
698static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
699{
700 return runtime->buffer_size - snd_pcm_playback_avail(runtime);
701}
702
703static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
704{
705 return runtime->buffer_size - snd_pcm_capture_avail(runtime);
706}
707
708/**
709 * snd_pcm_playback_ready - check whether the playback buffer is available
710 * @substream: the pcm substream instance
711 *
712 * Checks whether enough free space is available on the playback buffer.
713 *
714 * Returns non-zero if available, or zero if not.
715 */
716static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream)
717{
718 snd_pcm_runtime_t *runtime = substream->runtime;
719 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
720}
721
722/**
723 * snd_pcm_capture_ready - check whether the capture buffer is available
724 * @substream: the pcm substream instance
725 *
726 * Checks whether enough capture data is available on the capture buffer.
727 *
728 * Returns non-zero if available, or zero if not.
729 */
730static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream)
731{
732 snd_pcm_runtime_t *runtime = substream->runtime;
733 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
734}
735
736/**
737 * snd_pcm_playback_data - check whether any data exists on the playback buffer
738 * @substream: the pcm substream instance
739 *
740 * Checks whether any data exists on the playback buffer. If stop_threshold
741 * is bigger or equal to boundary, then this function returns always non-zero.
742 *
743 * Returns non-zero if exists, or zero if not.
744 */
745static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream)
746{
747 snd_pcm_runtime_t *runtime = substream->runtime;
748
749 if (runtime->stop_threshold >= runtime->boundary)
750 return 1;
751 return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
752}
753
754/**
755 * snd_pcm_playback_empty - check whether the playback buffer is empty
756 * @substream: the pcm substream instance
757 *
758 * Checks whether the playback buffer is empty.
759 *
760 * Returns non-zero if empty, or zero if not.
761 */
762static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream)
763{
764 snd_pcm_runtime_t *runtime = substream->runtime;
765 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
766}
767
768/**
769 * snd_pcm_capture_empty - check whether the capture buffer is empty
770 * @substream: the pcm substream instance
771 *
772 * Checks whether the capture buffer is empty.
773 *
774 * Returns non-zero if empty, or zero if not.
775 */
776static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream)
777{
778 snd_pcm_runtime_t *runtime = substream->runtime;
779 return snd_pcm_capture_avail(runtime) == 0;
780}
781
782static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
783 snd_pcm_substream_t *master)
784{
785 substream->runtime->trigger_master = master;
786}
787
788static inline int hw_is_mask(int var)
789{
790 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
791 var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
792}
793
794static inline int hw_is_interval(int var)
795{
796 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
797 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
798}
799
800static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
801 snd_pcm_hw_param_t var)
802{
803 return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
804}
805
806static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
807 snd_pcm_hw_param_t var)
808{
809 return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
810}
811
812static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
813 snd_pcm_hw_param_t var)
814{
815 return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
816}
817
818static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
819 snd_pcm_hw_param_t var)
820{
821 return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
822}
823
824#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
825#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
826#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
827#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
828#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
829#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
830#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
831#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
832#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
833#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
834#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
835
836
837int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
838void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
839void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
840void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
841 unsigned int k, snd_interval_t *c);
842void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
843 const snd_interval_t *b, snd_interval_t *c);
844int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
845int snd_interval_ratnum(snd_interval_t *i,
846 unsigned int rats_count, ratnum_t *rats,
847 unsigned int *nump, unsigned int *denp);
848
849void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
850void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
1da177e4
LT		 851int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
852 snd_pcm_hw_params_t *params,
853 snd_pcm_hw_param_t var,
854 unsigned int val, int *dir);
855int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
856 snd_pcm_hw_params_t *params,
857 snd_pcm_hw_param_t var,
858 unsigned int val, int dir);
859int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
860
861int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
1da177e4
LT		 862
863int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
864int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
865
866int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
867 u_int32_t mask);
868int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
869 u_int64_t mask);
870int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
871 unsigned int min, unsigned int max);
872int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
873int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
874 unsigned int cond,
875 snd_pcm_hw_param_t var,
876 snd_pcm_hw_constraint_list_t *l);
877int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
878 unsigned int cond,
879 snd_pcm_hw_param_t var,
880 snd_pcm_hw_constraint_ratnums_t *r);
881int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
882 unsigned int cond,
883 snd_pcm_hw_param_t var,
884 snd_pcm_hw_constraint_ratdens_t *r);
885int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
886 unsigned int cond,
887 unsigned int width,
888 unsigned int msbits);
889int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
890 unsigned int cond,
891 snd_pcm_hw_param_t var,
892 unsigned long step);
893int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
894 unsigned int cond,
895 snd_pcm_hw_param_t var);
896int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
897 unsigned int cond,
898 int var,
899 snd_pcm_hw_rule_func_t func, void *private,
900 int dep, ...);
901
902int snd_pcm_format_signed(snd_pcm_format_t format);
903int snd_pcm_format_unsigned(snd_pcm_format_t format);
904int snd_pcm_format_linear(snd_pcm_format_t format);
905int snd_pcm_format_little_endian(snd_pcm_format_t format);
906int snd_pcm_format_big_endian(snd_pcm_format_t format);
9502dcad
TI		 907/**
908 * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
909 * @format: the format to check
910 *
911 * Returns 1 if the given PCM format is CPU-endian, 0 if
912 * opposite, or a negative error code if endian not specified.
913 */
914/* int snd_pcm_format_cpu_endian(snd_pcm_format_t format); */
915#ifdef SNDRV_LITTLE_ENDIAN
916#define snd_pcm_format_cpu_endian snd_pcm_format_little_endian
917#else
918#define snd_pcm_format_cpu_endian snd_pcm_format_big_endian
919#endif
1da177e4
LT		 920int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
921int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
9502dcad 922ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1da177e4
LT		 923const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
924int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
925snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
926const char *snd_pcm_format_name(snd_pcm_format_t format);
927
928void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
929void snd_pcm_set_sync(snd_pcm_substream_t * substream);
930int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
931int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
932 unsigned int cmd, void *arg);
933int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
934int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
935int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
936int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
937int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
938void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
939void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
940void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
941void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
942void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
943snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
944 const void __user *buf,
945 snd_pcm_uframes_t frames);
946snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
947 void __user *buf, snd_pcm_uframes_t frames);
948snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
949 void __user **bufs, snd_pcm_uframes_t frames);
950snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
951 void __user **bufs, snd_pcm_uframes_t frames);
952
953int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
954
955static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
956 struct snd_dma_buffer *bufp)
957{
958 snd_pcm_runtime_t *runtime = substream->runtime;
959 if (bufp) {
960 runtime->dma_buffer_p = bufp;
961 runtime->dma_area = bufp->area;
962 runtime->dma_addr = bufp->addr;
963 runtime->dma_bytes = bufp->bytes;
964 } else {
965 runtime->dma_buffer_p = NULL;
966 runtime->dma_area = NULL;
967 runtime->dma_addr = 0;
968 runtime->dma_bytes = 0;
969 }
970}
971
972/*
973 * Timer interface
974 */
975
976void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
977void snd_pcm_timer_init(snd_pcm_substream_t * substream);
978void snd_pcm_timer_done(snd_pcm_substream_t * substream);
979
980/*
981 * Memory
982 */
983
984int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
985int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
986int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
987 int type, struct device *data,
988 size_t size, size_t max);
989int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
990 int type, void *data,
991 size_t size, size_t max);
992int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
993int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
994
995#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
996#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
997#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
998struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
999
1000/* handle mmap counter - PCM mmap callback should handle this counter properly */
1001static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1002{
1003 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1004 atomic_inc(&substream->runtime->mmap_count);
1005}
1006
1007static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1008{
1009 snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
1010 atomic_dec(&substream->runtime->mmap_count);
1011}
1012
1013/* mmap for io-memory area */
1014#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1015#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1016int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
1017#else
1018#define SNDRV_PCM_INFO_MMAP_IOMEM 0
1019#define snd_pcm_lib_mmap_iomem NULL
1020#endif
1021
1022static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1023{
1024 *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1025}
1026
1027/*
1028 * Misc
1029 */
1030
1031#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1032 (IEC958_AES1_CON_ORIGINAL<<8)|\
1033 (IEC958_AES1_CON_PCM_CODER<<8)|\
1034 (IEC958_AES3_CON_FS_48000<<24))
1035
1036#endif /* __SOUND_PCM_H */
Linux kernel - Deliverables
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