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/mm.h> 30#include <linux/bitops.h> 31 32#define snd_pcm_substream_chip(substream) ((substream)->private_data) 33#define snd_pcm_chip(pcm) ((pcm)->private_data) 34 35#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 36#include "pcm_oss.h" 37#endif 38 39/* 40 * Hardware (lowlevel) section 41 */ 42 43struct snd_pcm_hardware { 44 unsigned int info; /* SNDRV_PCM_INFO_* */ 45 u64 formats; /* SNDRV_PCM_FMTBIT_* */ 46 unsigned int rates; /* SNDRV_PCM_RATE_* */ 47 unsigned int rate_min; /* min rate */ 48 unsigned int rate_max; /* max rate */ 49 unsigned int channels_min; /* min channels */ 50 unsigned int channels_max; /* max channels */ 51 size_t buffer_bytes_max; /* max buffer size */ 52 size_t period_bytes_min; /* min period size */ 53 size_t period_bytes_max; /* max period size */ 54 unsigned int periods_min; /* min # of periods */ 55 unsigned int periods_max; /* max # of periods */ 56 size_t fifo_size; /* fifo size in bytes */ 57}; 58 59struct snd_pcm_substream; 60 61struct snd_pcm_ops { 62 int (*open)(struct snd_pcm_substream *substream); 63 int (*close)(struct snd_pcm_substream *substream); 64 int (*ioctl)(struct snd_pcm_substream * substream, 65 unsigned int cmd, void *arg); 66 int (*hw_params)(struct snd_pcm_substream *substream, 67 struct snd_pcm_hw_params *params); 68 int (*hw_free)(struct snd_pcm_substream *substream); 69 int (*prepare)(struct snd_pcm_substream *substream); 70 int (*trigger)(struct snd_pcm_substream *substream, int cmd); 71 snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); 72 int (*copy)(struct snd_pcm_substream *substream, int channel, 73 snd_pcm_uframes_t pos, 74 void __user *buf, snd_pcm_uframes_t count); 75 int (*silence)(struct snd_pcm_substream *substream, int channel, 76 snd_pcm_uframes_t pos, snd_pcm_uframes_t count); 77 struct page *(*page)(struct snd_pcm_substream *substream, 78 unsigned long offset); 79 int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); 80 int (*ack)(struct snd_pcm_substream *substream); 81}; 82 83/* 84 * 85 */ 86 87#define SNDRV_PCM_DEVICES 8 88 89#define SNDRV_PCM_IOCTL1_FALSE ((void *)0) 90#define SNDRV_PCM_IOCTL1_TRUE ((void *)1) 91 92#define SNDRV_PCM_IOCTL1_RESET 0 93#define SNDRV_PCM_IOCTL1_INFO 1 94#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 95#define SNDRV_PCM_IOCTL1_GSTATE 3 96 97#define SNDRV_PCM_TRIGGER_STOP 0 98#define SNDRV_PCM_TRIGGER_START 1 99#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 100#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 101#define SNDRV_PCM_TRIGGER_SUSPEND 5 102#define SNDRV_PCM_TRIGGER_RESUME 6 103 104#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) 105 106/* If you change this don't forget to change rates[] table in pcm_native.c */ 107#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ 108#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ 109#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ 110#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ 111#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ 112#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ 113#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ 114#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ 115#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ 116#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ 117#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ 118#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ 119#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ 120 121#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ 122#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ 123 124#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ 125 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ 126 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) 127#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) 128#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ 129 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) 130#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ 131 SNDRV_PCM_RATE_192000) 132#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8) 133#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8) 134#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE) 135#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE) 136#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE) 137#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE) 138#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE) 139#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE) 140#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE) 141#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE) 142#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE) 143#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE) 144#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE) 145#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE) 146#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE) 147#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE) 148#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE) 149#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE) 150#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE) 151#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE) 152#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW) 153#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW) 154#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM) 155#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG) 156#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM) 157#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL) 158#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE) 159#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE) 160#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE) 161#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE) 162#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE) 163#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE) 164#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE) 165#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE) 166#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE) 167#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE) 168#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE) 169#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE) 170 171#ifdef SNDRV_LITTLE_ENDIAN 172#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE 173#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE 174#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE 175#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE 176#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE 177#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE 178#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE 179#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE 180#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE 181#endif 182#ifdef SNDRV_BIG_ENDIAN 183#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE 184#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE 185#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE 186#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE 187#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE 188#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE 189#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE 190#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE 191#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE 192#endif 193 194struct snd_pcm_file { 195 struct snd_pcm_substream *substream; 196 int no_compat_mmap; 197}; 198 199struct snd_pcm_hw_rule; 200typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, 201 struct snd_pcm_hw_rule *rule); 202 203struct snd_pcm_hw_rule { 204 unsigned int cond; 205 snd_pcm_hw_rule_func_t func; 206 int var; 207 int deps[4]; 208 void *private; 209}; 210 211struct snd_pcm_hw_constraints { 212 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 213 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; 214 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - 215 SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; 216 unsigned int rules_num; 217 unsigned int rules_all; 218 struct snd_pcm_hw_rule *rules; 219}; 220 221static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, 222 snd_pcm_hw_param_t var) 223{ 224 return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 225} 226 227static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, 228 snd_pcm_hw_param_t var) 229{ 230 return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 231} 232 233struct snd_ratnum { 234 unsigned int num; 235 unsigned int den_min, den_max, den_step; 236}; 237 238struct snd_ratden { 239 unsigned int num_min, num_max, num_step; 240 unsigned int den; 241}; 242 243struct snd_pcm_hw_constraint_ratnums { 244 int nrats; 245 struct snd_ratnum *rats; 246}; 247 248struct snd_pcm_hw_constraint_ratdens { 249 int nrats; 250 struct snd_ratden *rats; 251}; 252 253struct snd_pcm_hw_constraint_list { 254 unsigned int count; 255 unsigned int *list; 256 unsigned int mask; 257}; 258 259struct snd_pcm_runtime { 260 /* -- Status -- */ 261 struct snd_pcm_substream *trigger_master; 262 struct timespec trigger_tstamp; /* trigger timestamp */ 263 int overrange; 264 snd_pcm_uframes_t avail_max; 265 snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ 266 snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/ 267 268 /* -- HW params -- */ 269 snd_pcm_access_t access; /* access mode */ 270 snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ 271 snd_pcm_subformat_t subformat; /* subformat */ 272 unsigned int rate; /* rate in Hz */ 273 unsigned int channels; /* channels */ 274 snd_pcm_uframes_t period_size; /* period size */ 275 unsigned int periods; /* periods */ 276 snd_pcm_uframes_t buffer_size; /* buffer size */ 277 unsigned int tick_time; /* tick time */ 278 snd_pcm_uframes_t min_align; /* Min alignment for the format */ 279 size_t byte_align; 280 unsigned int frame_bits; 281 unsigned int sample_bits; 282 unsigned int info; 283 unsigned int rate_num; 284 unsigned int rate_den; 285 286 /* -- SW params -- */ 287 int tstamp_mode; /* mmap timestamp is updated */ 288 unsigned int period_step; 289 unsigned int sleep_min; /* min ticks to sleep */ 290 snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */ 291 snd_pcm_uframes_t start_threshold; 292 snd_pcm_uframes_t stop_threshold; 293 snd_pcm_uframes_t silence_threshold; /* Silence filling happens when 294 noise is nearest than this */ 295 snd_pcm_uframes_t silence_size; /* Silence filling size */ 296 snd_pcm_uframes_t boundary; /* pointers wrap point */ 297 298 snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ 299 snd_pcm_uframes_t silence_filled; /* size filled with silence */ 300 301 union snd_pcm_sync_id sync; /* hardware synchronization ID */ 302 303 /* -- mmap -- */ 304 volatile struct snd_pcm_mmap_status *status; 305 volatile struct snd_pcm_mmap_control *control; 306 307 /* -- locking / scheduling -- */ 308 wait_queue_head_t sleep; 309 struct timer_list tick_timer; 310 struct fasync_struct *fasync; 311 312 /* -- private section -- */ 313 void *private_data; 314 void (*private_free)(struct snd_pcm_runtime *runtime); 315 316 /* -- hardware description -- */ 317 struct snd_pcm_hardware hw; 318 struct snd_pcm_hw_constraints hw_constraints; 319 320 /* -- interrupt callbacks -- */ 321 void (*transfer_ack_begin)(struct snd_pcm_substream *substream); 322 void (*transfer_ack_end)(struct snd_pcm_substream *substream); 323 324 /* -- timer -- */ 325 unsigned int timer_resolution; /* timer resolution */ 326 327 /* -- DMA -- */ 328 unsigned char *dma_area; /* DMA area */ 329 dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ 330 size_t dma_bytes; /* size of DMA area */ 331 332 struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ 333 334#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 335 /* -- OSS things -- */ 336 struct snd_pcm_oss_runtime oss; 337#endif 338}; 339 340struct snd_pcm_group { /* keep linked substreams */ 341 spinlock_t lock; 342 struct list_head substreams; 343 int count; 344}; 345 346struct snd_pcm_substream { 347 struct snd_pcm *pcm; 348 struct snd_pcm_str *pstr; 349 void *private_data; /* copied from pcm->private_data */ 350 int number; 351 char name[32]; /* substream name */ 352 int stream; /* stream (direction) */ 353 char latency_id[20]; /* latency identifier */ 354 size_t buffer_bytes_max; /* limit ring buffer size */ 355 struct snd_dma_buffer dma_buffer; 356 unsigned int dma_buf_id; 357 size_t dma_max; 358 /* -- hardware operations -- */ 359 struct snd_pcm_ops *ops; 360 /* -- runtime information -- */ 361 struct snd_pcm_runtime *runtime; 362 /* -- timer section -- */ 363 struct snd_timer *timer; /* timer */ 364 unsigned timer_running: 1; /* time is running */ 365 spinlock_t timer_lock; 366 /* -- next substream -- */ 367 struct snd_pcm_substream *next; 368 /* -- linked substreams -- */ 369 struct list_head link_list; /* linked list member */ 370 struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ 371 struct snd_pcm_group *group; /* pointer to current group */ 372 /* -- assigned files -- */ 373 void *file; 374 int ref_count; 375 atomic_t mmap_count; 376 unsigned int f_flags; 377 void (*pcm_release)(struct snd_pcm_substream *); 378#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 379 /* -- OSS things -- */ 380 struct snd_pcm_oss_substream oss; 381#endif 382#ifdef CONFIG_SND_VERBOSE_PROCFS 383 struct snd_info_entry *proc_root; 384 struct snd_info_entry *proc_info_entry; 385 struct snd_info_entry *proc_hw_params_entry; 386 struct snd_info_entry *proc_sw_params_entry; 387 struct snd_info_entry *proc_status_entry; 388 struct snd_info_entry *proc_prealloc_entry; 389 struct snd_info_entry *proc_prealloc_max_entry; 390#endif 391 /* misc flags */ 392 unsigned int hw_opened: 1; 393}; 394 395#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) 396 397 398struct snd_pcm_str { 399 int stream; /* stream (direction) */ 400 struct snd_pcm *pcm; 401 /* -- substreams -- */ 402 unsigned int substream_count; 403 unsigned int substream_opened; 404 struct snd_pcm_substream *substream; 405#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 406 /* -- OSS things -- */ 407 struct snd_pcm_oss_stream oss; 408#endif 409#ifdef CONFIG_SND_VERBOSE_PROCFS 410 struct snd_info_entry *proc_root; 411 struct snd_info_entry *proc_info_entry; 412#ifdef CONFIG_SND_PCM_XRUN_DEBUG 413 unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ 414 struct snd_info_entry *proc_xrun_debug_entry; 415#endif 416#endif 417}; 418 419struct snd_pcm { 420 struct snd_card *card; 421 struct list_head list; 422 unsigned int device; /* device number */ 423 unsigned int info_flags; 424 unsigned short dev_class; 425 unsigned short dev_subclass; 426 char id[64]; 427 char name[80]; 428 struct snd_pcm_str streams[2]; 429 struct mutex open_mutex; 430 wait_queue_head_t open_wait; 431 void *private_data; 432 void (*private_free) (struct snd_pcm *pcm); 433 struct device *dev; /* actual hw device this belongs to */ 434#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) 435 struct snd_pcm_oss oss; 436#endif 437}; 438 439struct snd_pcm_notify { 440 int (*n_register) (struct snd_pcm * pcm); 441 int (*n_disconnect) (struct snd_pcm * pcm); 442 int (*n_unregister) (struct snd_pcm * pcm); 443 struct list_head list; 444}; 445 446/* 447 * Registering 448 */ 449 450extern const struct file_operations snd_pcm_f_ops[2]; 451 452int snd_pcm_new(struct snd_card *card, char *id, int device, 453 int playback_count, int capture_count, 454 struct snd_pcm **rpcm); 455int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); 456 457int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); 458 459/* 460 * Native I/O 461 */ 462 463extern rwlock_t snd_pcm_link_rwlock; 464 465int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); 466int snd_pcm_info_user(struct snd_pcm_substream *substream, 467 struct snd_pcm_info __user *info); 468int snd_pcm_status(struct snd_pcm_substream *substream, 469 struct snd_pcm_status *status); 470int snd_pcm_start(struct snd_pcm_substream *substream); 471int snd_pcm_stop(struct snd_pcm_substream *substream, int status); 472int snd_pcm_drain_done(struct snd_pcm_substream *substream); 473#ifdef CONFIG_PM 474int snd_pcm_suspend(struct snd_pcm_substream *substream); 475int snd_pcm_suspend_all(struct snd_pcm *pcm); 476#endif 477int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); 478int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, 479 struct snd_pcm_substream **rsubstream); 480void snd_pcm_release_substream(struct snd_pcm_substream *substream); 481int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, 482 struct snd_pcm_substream **rsubstream); 483void snd_pcm_detach_substream(struct snd_pcm_substream *substream); 484void snd_pcm_vma_notify_data(void *client, void *data); 485int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); 486 487#if BITS_PER_LONG >= 64 488 489static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 490{ 491 *rem = *n % div; 492 *n /= div; 493} 494 495#elif defined(i386) 496 497static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 498{ 499 u_int32_t low, high; 500 low = *n & 0xffffffff; 501 high = *n >> 32; 502 if (high) { 503 u_int32_t high1 = high % div; 504 high /= div; 505 asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1)); 506 *n = (u_int64_t)high << 32 | low; 507 } else { 508 *n = low / div; 509 *rem = low % div; 510 } 511} 512#else 513 514static inline void divl(u_int32_t high, u_int32_t low, 515 u_int32_t div, 516 u_int32_t *q, u_int32_t *r) 517{ 518 u_int64_t n = (u_int64_t)high << 32 | low; 519 u_int64_t d = (u_int64_t)div << 31; 520 u_int32_t q1 = 0; 521 int c = 32; 522 while (n > 0xffffffffU) { 523 q1 <<= 1; 524 if (n >= d) { 525 n -= d; 526 q1 |= 1; 527 } 528 d >>= 1; 529 c--; 530 } 531 q1 <<= c; 532 if (n) { 533 low = n; 534 *q = q1 | (low / div); 535 *r = low % div; 536 } else { 537 *r = 0; 538 *q = q1; 539 } 540 return; 541} 542 543static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem) 544{ 545 u_int32_t low, high; 546 low = *n & 0xffffffff; 547 high = *n >> 32; 548 if (high) { 549 u_int32_t high1 = high % div; 550 u_int32_t low1 = low; 551 high /= div; 552 divl(high1, low1, div, &low, rem); 553 *n = (u_int64_t)high << 32 | low; 554 } else { 555 *n = low / div; 556 *rem = low % div; 557 } 558} 559#endif 560 561/* 562 * PCM library 563 */ 564 565static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) 566{ 567 return substream->group != &substream->self_group; 568} 569 570static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) 571{ 572 read_lock(&snd_pcm_link_rwlock); 573 spin_lock(&substream->self_group.lock); 574} 575 576static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) 577{ 578 spin_unlock(&substream->self_group.lock); 579 read_unlock(&snd_pcm_link_rwlock); 580} 581 582static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) 583{ 584 read_lock_irq(&snd_pcm_link_rwlock); 585 spin_lock(&substream->self_group.lock); 586} 587 588static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) 589{ 590 spin_unlock(&substream->self_group.lock); 591 read_unlock_irq(&snd_pcm_link_rwlock); 592} 593 594#define snd_pcm_stream_lock_irqsave(substream, flags) \ 595do { \ 596 read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ 597 spin_lock(&substream->self_group.lock); \ 598} while (0) 599 600#define snd_pcm_stream_unlock_irqrestore(substream, flags) \ 601do { \ 602 spin_unlock(&substream->self_group.lock); \ 603 read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ 604} while (0) 605 606#define snd_pcm_group_for_each_entry(s, substream) \ 607 list_for_each_entry(s, &substream->group->substreams, link_list) 608 609static inline int snd_pcm_running(struct snd_pcm_substream *substream) 610{ 611 return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || 612 (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && 613 substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); 614} 615 616static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) 617{ 618 return size * 8 / runtime->sample_bits; 619} 620 621static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) 622{ 623 return size * 8 / runtime->frame_bits; 624} 625 626static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) 627{ 628 return size * runtime->sample_bits / 8; 629} 630 631static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) 632{ 633 return size * runtime->frame_bits / 8; 634} 635 636static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) 637{ 638 return bytes % runtime->byte_align == 0; 639} 640 641static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) 642{ 643 struct snd_pcm_runtime *runtime = substream->runtime; 644 return frames_to_bytes(runtime, runtime->buffer_size); 645} 646 647static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) 648{ 649 struct snd_pcm_runtime *runtime = substream->runtime; 650 return frames_to_bytes(runtime, runtime->period_size); 651} 652 653/* 654 * result is: 0 ... (boundary - 1) 655 */ 656static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) 657{ 658 snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; 659 if (avail < 0) 660 avail += runtime->boundary; 661 else if ((snd_pcm_uframes_t) avail >= runtime->boundary) 662 avail -= runtime->boundary; 663 return avail; 664} 665 666/* 667 * result is: 0 ... (boundary - 1) 668 */ 669static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) 670{ 671 snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; 672 if (avail < 0) 673 avail += runtime->boundary; 674 return avail; 675} 676 677static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) 678{ 679 return runtime->buffer_size - snd_pcm_playback_avail(runtime); 680} 681 682static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) 683{ 684 return runtime->buffer_size - snd_pcm_capture_avail(runtime); 685} 686 687/** 688 * snd_pcm_playback_ready - check whether the playback buffer is available 689 * @substream: the pcm substream instance 690 * 691 * Checks whether enough free space is available on the playback buffer. 692 * 693 * Returns non-zero if available, or zero if not. 694 */ 695static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) 696{ 697 struct snd_pcm_runtime *runtime = substream->runtime; 698 return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; 699} 700 701/** 702 * snd_pcm_capture_ready - check whether the capture buffer is available 703 * @substream: the pcm substream instance 704 * 705 * Checks whether enough capture data is available on the capture buffer. 706 * 707 * Returns non-zero if available, or zero if not. 708 */ 709static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) 710{ 711 struct snd_pcm_runtime *runtime = substream->runtime; 712 return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; 713} 714 715/** 716 * snd_pcm_playback_data - check whether any data exists on the playback buffer 717 * @substream: the pcm substream instance 718 * 719 * Checks whether any data exists on the playback buffer. If stop_threshold 720 * is bigger or equal to boundary, then this function returns always non-zero. 721 * 722 * Returns non-zero if exists, or zero if not. 723 */ 724static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) 725{ 726 struct snd_pcm_runtime *runtime = substream->runtime; 727 728 if (runtime->stop_threshold >= runtime->boundary) 729 return 1; 730 return snd_pcm_playback_avail(runtime) < runtime->buffer_size; 731} 732 733/** 734 * snd_pcm_playback_empty - check whether the playback buffer is empty 735 * @substream: the pcm substream instance 736 * 737 * Checks whether the playback buffer is empty. 738 * 739 * Returns non-zero if empty, or zero if not. 740 */ 741static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) 742{ 743 struct snd_pcm_runtime *runtime = substream->runtime; 744 return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; 745} 746 747/** 748 * snd_pcm_capture_empty - check whether the capture buffer is empty 749 * @substream: the pcm substream instance 750 * 751 * Checks whether the capture buffer is empty. 752 * 753 * Returns non-zero if empty, or zero if not. 754 */ 755static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) 756{ 757 struct snd_pcm_runtime *runtime = substream->runtime; 758 return snd_pcm_capture_avail(runtime) == 0; 759} 760 761static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 762 struct snd_pcm_substream *master) 763{ 764 substream->runtime->trigger_master = master; 765} 766 767static inline int hw_is_mask(int var) 768{ 769 return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && 770 var <= SNDRV_PCM_HW_PARAM_LAST_MASK; 771} 772 773static inline int hw_is_interval(int var) 774{ 775 return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && 776 var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; 777} 778 779static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, 780 snd_pcm_hw_param_t var) 781{ 782 return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; 783} 784 785static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, 786 snd_pcm_hw_param_t var) 787{ 788 return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; 789} 790 791static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, 792 snd_pcm_hw_param_t var) 793{ 794 return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var); 795} 796 797static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, 798 snd_pcm_hw_param_t var) 799{ 800 return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var); 801} 802 803#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS)) 804#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT)) 805#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT)) 806#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min 807#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min 808#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min 809#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8) 810#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min 811#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min 812#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min 813#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min 814 815 816int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); 817void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 818void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); 819void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 820 unsigned int k, struct snd_interval *c); 821void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 822 const struct snd_interval *b, struct snd_interval *c); 823int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask); 824int snd_interval_ratnum(struct snd_interval *i, 825 unsigned int rats_count, struct snd_ratnum *rats, 826 unsigned int *nump, unsigned int *denp); 827 828void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); 829void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); 830int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 831 832int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); 833 834int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); 835int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); 836 837int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 838 u_int32_t mask); 839int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 840 u_int64_t mask); 841int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 842 unsigned int min, unsigned int max); 843int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); 844int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 845 unsigned int cond, 846 snd_pcm_hw_param_t var, 847 struct snd_pcm_hw_constraint_list *l); 848int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 849 unsigned int cond, 850 snd_pcm_hw_param_t var, 851 struct snd_pcm_hw_constraint_ratnums *r); 852int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 853 unsigned int cond, 854 snd_pcm_hw_param_t var, 855 struct snd_pcm_hw_constraint_ratdens *r); 856int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 857 unsigned int cond, 858 unsigned int width, 859 unsigned int msbits); 860int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 861 unsigned int cond, 862 snd_pcm_hw_param_t var, 863 unsigned long step); 864int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 865 unsigned int cond, 866 snd_pcm_hw_param_t var); 867int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, 868 unsigned int cond, 869 int var, 870 snd_pcm_hw_rule_func_t func, void *private, 871 int dep, ...); 872 873int snd_pcm_format_signed(snd_pcm_format_t format); 874int snd_pcm_format_unsigned(snd_pcm_format_t format); 875int snd_pcm_format_linear(snd_pcm_format_t format); 876int snd_pcm_format_little_endian(snd_pcm_format_t format); 877int snd_pcm_format_big_endian(snd_pcm_format_t format); 878#ifdef SNDRV_LITTLE_ENDIAN 879#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) 880#else 881#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) 882#endif 883int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ 884int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ 885ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); 886const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); 887int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); 888snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); 889 890void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); 891void snd_pcm_set_sync(struct snd_pcm_substream *substream); 892int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); 893int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 894 unsigned int cmd, void *arg); 895int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); 896int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); 897int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); 898int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); 899int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); 900void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); 901void snd_pcm_tick_prepare(struct snd_pcm_substream *substream); 902void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks); 903void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream); 904void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); 905snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, 906 const void __user *buf, 907 snd_pcm_uframes_t frames); 908snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, 909 void __user *buf, snd_pcm_uframes_t frames); 910snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 911 void __user **bufs, snd_pcm_uframes_t frames); 912snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 913 void __user **bufs, snd_pcm_uframes_t frames); 914 915int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); 916 917static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, 918 struct snd_dma_buffer *bufp) 919{ 920 struct snd_pcm_runtime *runtime = substream->runtime; 921 if (bufp) { 922 runtime->dma_buffer_p = bufp; 923 runtime->dma_area = bufp->area; 924 runtime->dma_addr = bufp->addr; 925 runtime->dma_bytes = bufp->bytes; 926 } else { 927 runtime->dma_buffer_p = NULL; 928 runtime->dma_area = NULL; 929 runtime->dma_addr = 0; 930 runtime->dma_bytes = 0; 931 } 932} 933 934/* 935 * Timer interface 936 */ 937 938void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); 939void snd_pcm_timer_init(struct snd_pcm_substream *substream); 940void snd_pcm_timer_done(struct snd_pcm_substream *substream); 941 942/* 943 * Memory 944 */ 945 946int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); 947int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); 948int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, 949 int type, struct device *data, 950 size_t size, size_t max); 951int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, 952 int type, void *data, 953 size_t size, size_t max); 954int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); 955int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); 956 957#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data) 958#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size) 959#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs) 960struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); 961 962/* handle mmap counter - PCM mmap callback should handle this counter properly */ 963static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) 964{ 965 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 966 atomic_inc(&substream->mmap_count); 967} 968 969static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) 970{ 971 struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; 972 atomic_dec(&substream->mmap_count); 973} 974 975/* mmap for io-memory area */ 976#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) 977#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP 978int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); 979#else 980#define SNDRV_PCM_INFO_MMAP_IOMEM 0 981#define snd_pcm_lib_mmap_iomem NULL 982#endif 983 984static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) 985{ 986 *max = dma < 4 ? 64 * 1024 : 128 * 1024; 987} 988 989/* 990 * Misc 991 */ 992 993#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ 994 (IEC958_AES1_CON_ORIGINAL<<8)|\ 995 (IEC958_AES1_CON_PCM_CODER<<8)|\ 996 (IEC958_AES3_CON_FS_48000<<24)) 997 998#endif /* __SOUND_PCM_H */ 999