diff options
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 1076 |
1 files changed, 1076 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h new file mode 100644 index 00000000..0d111281 --- /dev/null +++ b/include/sound/pcm.h @@ -0,0 +1,1076 @@ +#ifndef __SOUND_PCM_H +#define __SOUND_PCM_H + +/* + * Digital Audio (PCM) abstract layer + * Copyright (c) by Jaroslav Kysela <perex@perex.cz> + * Abramo Bagnara <abramo@alsa-project.org> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <sound/asound.h> +#include <sound/memalloc.h> +#include <sound/minors.h> +#include <linux/poll.h> +#include <linux/mm.h> +#include <linux/bitops.h> +#include <linux/pm_qos.h> + +#define snd_pcm_substream_chip(substream) ((substream)->private_data) +#define snd_pcm_chip(pcm) ((pcm)->private_data) + +#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) +#include "pcm_oss.h" +#endif + +/* + * Hardware (lowlevel) section + */ + +struct snd_pcm_hardware { + unsigned int info; /* SNDRV_PCM_INFO_* */ + u64 formats; /* SNDRV_PCM_FMTBIT_* */ + unsigned int rates; /* SNDRV_PCM_RATE_* */ + unsigned int rate_min; /* min rate */ + unsigned int rate_max; /* max rate */ + unsigned int channels_min; /* min channels */ + unsigned int channels_max; /* max channels */ + size_t buffer_bytes_max; /* max buffer size */ + size_t period_bytes_min; /* min period size */ + size_t period_bytes_max; /* max period size */ + unsigned int periods_min; /* min # of periods */ + unsigned int periods_max; /* max # of periods */ + size_t fifo_size; /* fifo size in bytes */ +}; + +struct snd_pcm_substream; + +struct snd_pcm_ops { + int (*open)(struct snd_pcm_substream *substream); + int (*close)(struct snd_pcm_substream *substream); + int (*ioctl)(struct snd_pcm_substream * substream, + unsigned int cmd, void *arg); + int (*hw_params)(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params); + int (*hw_free)(struct snd_pcm_substream *substream); + int (*prepare)(struct snd_pcm_substream *substream); + int (*trigger)(struct snd_pcm_substream *substream, int cmd); + snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); + int (*copy)(struct snd_pcm_substream *substream, int channel, + snd_pcm_uframes_t pos, + void __user *buf, snd_pcm_uframes_t count); + int (*silence)(struct snd_pcm_substream *substream, int channel, + snd_pcm_uframes_t pos, snd_pcm_uframes_t count); + struct page *(*page)(struct snd_pcm_substream *substream, + unsigned long offset); + int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); + int (*ack)(struct snd_pcm_substream *substream); +}; + +/* + * + */ + +#if defined(CONFIG_SND_DYNAMIC_MINORS) +#define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) +#else +#define SNDRV_PCM_DEVICES 8 +#endif + +#define SNDRV_PCM_IOCTL1_FALSE ((void *)0) +#define SNDRV_PCM_IOCTL1_TRUE ((void *)1) + +#define SNDRV_PCM_IOCTL1_RESET 0 +#define SNDRV_PCM_IOCTL1_INFO 1 +#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 +#define SNDRV_PCM_IOCTL1_GSTATE 3 +#define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 + +#define SNDRV_PCM_TRIGGER_STOP 0 +#define SNDRV_PCM_TRIGGER_START 1 +#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 +#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 +#define SNDRV_PCM_TRIGGER_SUSPEND 5 +#define SNDRV_PCM_TRIGGER_RESUME 6 + +#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) + +/* If you change this don't forget to change rates[] table in pcm_native.c */ +#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ +#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ +#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ +#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ +#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ +#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ +#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ +#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ +#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ +#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ +#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ +#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ +#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ + +#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ +#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ + +#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ + SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ + SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) +#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) +#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ + SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) +#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ + SNDRV_PCM_RATE_192000) +#define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) +#define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) +#define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) +#define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) +#define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) +#define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) +#define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) +#define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) +#define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) +#define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) +#define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) +#define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) +#define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) +#define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) +#define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) +#define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) +#define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) +#define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) +#define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) +#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) +#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) +#define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) +#define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) +#define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) +#define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) +#define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) +#define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) +#define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) +#define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) +#define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) +#define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) +#define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) +#define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) +#define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) +#define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) +#define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) +#define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) +#define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) +#define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) +#define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) +#define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) +#define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) +#define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) + +#ifdef SNDRV_LITTLE_ENDIAN +#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE +#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE +#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE +#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE +#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE +#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE +#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE +#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE +#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE +#endif +#ifdef SNDRV_BIG_ENDIAN +#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE +#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE +#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE +#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE +#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE +#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE +#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE +#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE +#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE +#endif + +struct snd_pcm_file { + struct snd_pcm_substream *substream; + int no_compat_mmap; +}; + +struct snd_pcm_hw_rule; +typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule); + +struct snd_pcm_hw_rule { + unsigned int cond; + snd_pcm_hw_rule_func_t func; + int var; + int deps[4]; + void *private; +}; + +struct snd_pcm_hw_constraints { + struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - + SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; + struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - + SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; + unsigned int rules_num; + unsigned int rules_all; + struct snd_pcm_hw_rule *rules; +}; + +static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, + snd_pcm_hw_param_t var) +{ + return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; +} + +static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, + snd_pcm_hw_param_t var) +{ + return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; +} + +struct snd_ratnum { + unsigned int num; + unsigned int den_min, den_max, den_step; +}; + +struct snd_ratden { + unsigned int num_min, num_max, num_step; + unsigned int den; +}; + +struct snd_pcm_hw_constraint_ratnums { + int nrats; + struct snd_ratnum *rats; +}; + +struct snd_pcm_hw_constraint_ratdens { + int nrats; + struct snd_ratden *rats; +}; + +struct snd_pcm_hw_constraint_list { + unsigned int count; + const unsigned int *list; + unsigned int mask; +}; + +struct snd_pcm_hwptr_log; + +struct snd_pcm_runtime { + /* -- Status -- */ + struct snd_pcm_substream *trigger_master; + struct timespec trigger_tstamp; /* trigger timestamp */ + int overrange; + snd_pcm_uframes_t avail_max; + snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ + snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ + unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ + unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ + snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ + + /* -- HW params -- */ + snd_pcm_access_t access; /* access mode */ + snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ + snd_pcm_subformat_t subformat; /* subformat */ + unsigned int rate; /* rate in Hz */ + unsigned int channels; /* channels */ + snd_pcm_uframes_t period_size; /* period size */ + unsigned int periods; /* periods */ + snd_pcm_uframes_t buffer_size; /* buffer size */ + snd_pcm_uframes_t min_align; /* Min alignment for the format */ + size_t byte_align; + unsigned int frame_bits; + unsigned int sample_bits; + unsigned int info; + unsigned int rate_num; + unsigned int rate_den; + unsigned int no_period_wakeup: 1; + + /* -- SW params -- */ + int tstamp_mode; /* mmap timestamp is updated */ + unsigned int period_step; + snd_pcm_uframes_t start_threshold; + snd_pcm_uframes_t stop_threshold; + snd_pcm_uframes_t silence_threshold; /* Silence filling happens when + noise is nearest than this */ + snd_pcm_uframes_t silence_size; /* Silence filling size */ + snd_pcm_uframes_t boundary; /* pointers wrap point */ + + snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ + snd_pcm_uframes_t silence_filled; /* size filled with silence */ + + union snd_pcm_sync_id sync; /* hardware synchronization ID */ + + /* -- mmap -- */ + struct snd_pcm_mmap_status *status; + struct snd_pcm_mmap_control *control; + + /* -- locking / scheduling -- */ + snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ + wait_queue_head_t sleep; /* poll sleep */ + wait_queue_head_t tsleep; /* transfer sleep */ + struct fasync_struct *fasync; + + /* -- private section -- */ + void *private_data; + void (*private_free)(struct snd_pcm_runtime *runtime); + + /* -- hardware description -- */ + struct snd_pcm_hardware hw; + struct snd_pcm_hw_constraints hw_constraints; + + /* -- interrupt callbacks -- */ + void (*transfer_ack_begin)(struct snd_pcm_substream *substream); + void (*transfer_ack_end)(struct snd_pcm_substream *substream); + + /* -- timer -- */ + unsigned int timer_resolution; /* timer resolution */ + int tstamp_type; /* timestamp type */ + + /* -- DMA -- */ + unsigned char *dma_area; /* DMA area */ + dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ + size_t dma_bytes; /* size of DMA area */ + + struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ + +#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) + /* -- OSS things -- */ + struct snd_pcm_oss_runtime oss; +#endif + +#ifdef CONFIG_SND_PCM_XRUN_DEBUG + struct snd_pcm_hwptr_log *hwptr_log; +#endif +}; + +struct snd_pcm_group { /* keep linked substreams */ + spinlock_t lock; + struct list_head substreams; + int count; +}; + +struct pid; + +struct snd_pcm_substream { + struct snd_pcm *pcm; + struct snd_pcm_str *pstr; + void *private_data; /* copied from pcm->private_data */ + int number; + char name[32]; /* substream name */ + int stream; /* stream (direction) */ + struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ + size_t buffer_bytes_max; /* limit ring buffer size */ + struct snd_dma_buffer dma_buffer; + unsigned int dma_buf_id; + size_t dma_max; + /* -- hardware operations -- */ + struct snd_pcm_ops *ops; + /* -- runtime information -- */ + struct snd_pcm_runtime *runtime; + /* -- timer section -- */ + struct snd_timer *timer; /* timer */ + unsigned timer_running: 1; /* time is running */ + /* -- next substream -- */ + struct snd_pcm_substream *next; + /* -- linked substreams -- */ + struct list_head link_list; /* linked list member */ + struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ + struct snd_pcm_group *group; /* pointer to current group */ + /* -- assigned files -- */ + void *file; + int ref_count; + atomic_t mmap_count; + unsigned int f_flags; + void (*pcm_release)(struct snd_pcm_substream *); + struct pid *pid; +#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) + /* -- OSS things -- */ + struct snd_pcm_oss_substream oss; +#endif +#ifdef CONFIG_SND_VERBOSE_PROCFS + struct snd_info_entry *proc_root; + struct snd_info_entry *proc_info_entry; + struct snd_info_entry *proc_hw_params_entry; + struct snd_info_entry *proc_sw_params_entry; + struct snd_info_entry *proc_status_entry; + struct snd_info_entry *proc_prealloc_entry; + struct snd_info_entry *proc_prealloc_max_entry; +#endif + /* misc flags */ + unsigned int hw_opened: 1; +}; + +#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) + + +struct snd_pcm_str { + int stream; /* stream (direction) */ + struct snd_pcm *pcm; + /* -- substreams -- */ + unsigned int substream_count; + unsigned int substream_opened; + struct snd_pcm_substream *substream; +#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) + /* -- OSS things -- */ + struct snd_pcm_oss_stream oss; +#endif +#ifdef CONFIG_SND_VERBOSE_PROCFS + struct snd_info_entry *proc_root; + struct snd_info_entry *proc_info_entry; +#ifdef CONFIG_SND_PCM_XRUN_DEBUG + unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ + struct snd_info_entry *proc_xrun_debug_entry; +#endif +#endif +}; + +struct snd_pcm { + struct snd_card *card; + struct list_head list; + int device; /* device number */ + unsigned int info_flags; + unsigned short dev_class; + unsigned short dev_subclass; + char id[64]; + char name[80]; + struct snd_pcm_str streams[2]; + struct mutex open_mutex; + wait_queue_head_t open_wait; + void *private_data; + void (*private_free) (struct snd_pcm *pcm); + struct device *dev; /* actual hw device this belongs to */ + bool internal; /* pcm is for internal use only */ +#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) + struct snd_pcm_oss oss; +#endif +}; + +struct snd_pcm_notify { + int (*n_register) (struct snd_pcm * pcm); + int (*n_disconnect) (struct snd_pcm * pcm); + int (*n_unregister) (struct snd_pcm * pcm); + struct list_head list; +}; + +/* + * Registering + */ + +extern const struct file_operations snd_pcm_f_ops[2]; + +int snd_pcm_new(struct snd_card *card, const char *id, int device, + int playback_count, int capture_count, + struct snd_pcm **rpcm); +int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, + int playback_count, int capture_count, + struct snd_pcm **rpcm); +int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); + +int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); + +/* + * Native I/O + */ + +extern rwlock_t snd_pcm_link_rwlock; + +int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); +int snd_pcm_info_user(struct snd_pcm_substream *substream, + struct snd_pcm_info __user *info); +int snd_pcm_status(struct snd_pcm_substream *substream, + struct snd_pcm_status *status); +int snd_pcm_start(struct snd_pcm_substream *substream); +int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); +int snd_pcm_drain_done(struct snd_pcm_substream *substream); +#ifdef CONFIG_PM +int snd_pcm_suspend(struct snd_pcm_substream *substream); +int snd_pcm_suspend_all(struct snd_pcm *pcm); +#endif +int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); +int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, + struct snd_pcm_substream **rsubstream); +void snd_pcm_release_substream(struct snd_pcm_substream *substream); +int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, + struct snd_pcm_substream **rsubstream); +void snd_pcm_detach_substream(struct snd_pcm_substream *substream); +void snd_pcm_vma_notify_data(void *client, void *data); +int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); + + +#ifdef CONFIG_SND_DEBUG +void snd_pcm_debug_name(struct snd_pcm_substream *substream, + char *name, size_t len); +#else +static inline void +snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) +{ + *buf = 0; +} +#endif + +/* + * PCM library + */ + +static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) +{ + return substream->group != &substream->self_group; +} + +static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream) +{ + read_lock(&snd_pcm_link_rwlock); + spin_lock(&substream->self_group.lock); +} + +static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream) +{ + spin_unlock(&substream->self_group.lock); + read_unlock(&snd_pcm_link_rwlock); +} + +static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream) +{ + read_lock_irq(&snd_pcm_link_rwlock); + spin_lock(&substream->self_group.lock); +} + +static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream) +{ + spin_unlock(&substream->self_group.lock); + read_unlock_irq(&snd_pcm_link_rwlock); +} + +#define snd_pcm_stream_lock_irqsave(substream, flags) \ +do { \ + read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \ + spin_lock(&substream->self_group.lock); \ +} while (0) + +#define snd_pcm_stream_unlock_irqrestore(substream, flags) \ +do { \ + spin_unlock(&substream->self_group.lock); \ + read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \ +} while (0) + +#define snd_pcm_group_for_each_entry(s, substream) \ + list_for_each_entry(s, &substream->group->substreams, link_list) + +static inline int snd_pcm_running(struct snd_pcm_substream *substream) +{ + return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || + (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && + substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); +} + +static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) +{ + return size * 8 / runtime->sample_bits; +} + +static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) +{ + return size * 8 / runtime->frame_bits; +} + +static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) +{ + return size * runtime->sample_bits / 8; +} + +static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) +{ + return size * runtime->frame_bits / 8; +} + +static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) +{ + return bytes % runtime->byte_align == 0; +} + +static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return frames_to_bytes(runtime, runtime->buffer_size); +} + +static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return frames_to_bytes(runtime, runtime->period_size); +} + +/* + * result is: 0 ... (boundary - 1) + */ +static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) +{ + snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; + if (avail < 0) + avail += runtime->boundary; + else if ((snd_pcm_uframes_t) avail >= runtime->boundary) + avail -= runtime->boundary; + return avail; +} + +/* + * result is: 0 ... (boundary - 1) + */ +static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) +{ + snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; + if (avail < 0) + avail += runtime->boundary; + return avail; +} + +static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) +{ + return runtime->buffer_size - snd_pcm_playback_avail(runtime); +} + +static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) +{ + return runtime->buffer_size - snd_pcm_capture_avail(runtime); +} + +/** + * snd_pcm_playback_ready - check whether the playback buffer is available + * @substream: the pcm substream instance + * + * Checks whether enough free space is available on the playback buffer. + * + * Returns non-zero if available, or zero if not. + */ +static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; +} + +/** + * snd_pcm_capture_ready - check whether the capture buffer is available + * @substream: the pcm substream instance + * + * Checks whether enough capture data is available on the capture buffer. + * + * Returns non-zero if available, or zero if not. + */ +static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; +} + +/** + * snd_pcm_playback_data - check whether any data exists on the playback buffer + * @substream: the pcm substream instance + * + * Checks whether any data exists on the playback buffer. If stop_threshold + * is bigger or equal to boundary, then this function returns always non-zero. + * + * Returns non-zero if exists, or zero if not. + */ +static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + if (runtime->stop_threshold >= runtime->boundary) + return 1; + return snd_pcm_playback_avail(runtime) < runtime->buffer_size; +} + +/** + * snd_pcm_playback_empty - check whether the playback buffer is empty + * @substream: the pcm substream instance + * + * Checks whether the playback buffer is empty. + * + * Returns non-zero if empty, or zero if not. + */ +static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; +} + +/** + * snd_pcm_capture_empty - check whether the capture buffer is empty + * @substream: the pcm substream instance + * + * Checks whether the capture buffer is empty. + * + * Returns non-zero if empty, or zero if not. + */ +static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + return snd_pcm_capture_avail(runtime) == 0; +} + +static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, + struct snd_pcm_substream *master) +{ + substream->runtime->trigger_master = master; +} + +static inline int hw_is_mask(int var) +{ + return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && + var <= SNDRV_PCM_HW_PARAM_LAST_MASK; +} + +static inline int hw_is_interval(int var) +{ + return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && + var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; +} + +static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var) +{ + return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; +} + +static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var) +{ + return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; +} + +static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var) +{ + return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; +} + +static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var) +{ + return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; +} + +#define params_channels(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min) +#define params_rate(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min) +#define params_period_size(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min) +#define params_periods(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min) +#define params_buffer_size(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min) +#define params_buffer_bytes(p) \ + (hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min) + +int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); +void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); +void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); +void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, + unsigned int k, struct snd_interval *c); +void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, + const struct snd_interval *b, struct snd_interval *c); +int snd_interval_list(struct snd_interval *i, unsigned int count, + const unsigned int *list, unsigned int mask); +int snd_interval_ratnum(struct snd_interval *i, + unsigned int rats_count, struct snd_ratnum *rats, + unsigned int *nump, unsigned int *denp); + +void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); +void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); +int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); + +int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); + +int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); +int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); + +int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, + u_int32_t mask); +int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, + u_int64_t mask); +int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, + unsigned int min, unsigned int max); +int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); +int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + struct snd_pcm_hw_constraint_list *l); +int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + struct snd_pcm_hw_constraint_ratnums *r); +int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + struct snd_pcm_hw_constraint_ratdens *r); +int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, + unsigned int cond, + unsigned int width, + unsigned int msbits); +int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var, + unsigned long step); +int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, + unsigned int cond, + snd_pcm_hw_param_t var); +int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, + unsigned int base_rate); +int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, + unsigned int cond, + int var, + snd_pcm_hw_rule_func_t func, void *private, + int dep, ...); + +int snd_pcm_format_signed(snd_pcm_format_t format); +int snd_pcm_format_unsigned(snd_pcm_format_t format); +int snd_pcm_format_linear(snd_pcm_format_t format); +int snd_pcm_format_little_endian(snd_pcm_format_t format); +int snd_pcm_format_big_endian(snd_pcm_format_t format); +#if 0 /* just for DocBook */ +/** + * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian + * @format: the format to check + * + * Returns 1 if the given PCM format is CPU-endian, 0 if + * opposite, or a negative error code if endian not specified. + */ +int snd_pcm_format_cpu_endian(snd_pcm_format_t format); +#endif /* DocBook */ +#ifdef SNDRV_LITTLE_ENDIAN +#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) +#else +#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) +#endif +int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ +int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ +ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); +const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); +int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); +snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian); + +void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops); +void snd_pcm_set_sync(struct snd_pcm_substream *substream); +int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream); +int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, + unsigned int cmd, void *arg); +int snd_pcm_update_state(struct snd_pcm_substream *substream, + struct snd_pcm_runtime *runtime); +int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); +int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream); +int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream); +int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream); +int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream); +void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); +void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); +snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, + const void __user *buf, + snd_pcm_uframes_t frames); +snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, + void __user *buf, snd_pcm_uframes_t frames); +snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, + void __user **bufs, snd_pcm_uframes_t frames); +snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, + void __user **bufs, snd_pcm_uframes_t frames); + +extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; + +int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); +unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); + +static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, + struct snd_dma_buffer *bufp) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + if (bufp) { + runtime->dma_buffer_p = bufp; + runtime->dma_area = bufp->area; + runtime->dma_addr = bufp->addr; + runtime->dma_bytes = bufp->bytes; + } else { + runtime->dma_buffer_p = NULL; + runtime->dma_area = NULL; + runtime->dma_addr = 0; + runtime->dma_bytes = 0; + } +} + +/* + * Timer interface + */ + +void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); +void snd_pcm_timer_init(struct snd_pcm_substream *substream); +void snd_pcm_timer_done(struct snd_pcm_substream *substream); + +static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, + struct timespec *tv) +{ + if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC) + do_posix_clock_monotonic_gettime(tv); + else + getnstimeofday(tv); +} + +/* + * Memory + */ + +int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); +int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); +int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, + int type, struct device *data, + size_t size, size_t max); +int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, + int type, void *data, + size_t size, size_t max); +int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); +int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); + +int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, + size_t size, gfp_t gfp_flags); +int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); +struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, + unsigned long offset); +#if 0 /* for kernel-doc */ +/** + * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer + * @substream: the substream to allocate the buffer to + * @size: the requested buffer size, in bytes + * + * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is + * contiguous in kernel virtual space, but not in physical memory. Use this + * if the buffer is accessed by kernel code but not by device DMA. + * + * Returns 1 if the buffer was changed, 0 if not changed, or a negative error + * code. + */ +static int snd_pcm_lib_alloc_vmalloc_buffer + (struct snd_pcm_substream *substream, size_t size); +/** + * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer + * @substream: the substream to allocate the buffer to + * @size: the requested buffer size, in bytes + * + * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses + * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. + */ +static int snd_pcm_lib_alloc_vmalloc_32_buffer + (struct snd_pcm_substream *substream, size_t size); +#endif +#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \ + _snd_pcm_lib_alloc_vmalloc_buffer \ + (subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO) +#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \ + _snd_pcm_lib_alloc_vmalloc_buffer \ + (subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO) + +#ifdef CONFIG_SND_DMA_SGBUF +/* + * SG-buffer handling + */ +#define snd_pcm_substream_sgbuf(substream) \ + ((substream)->runtime->dma_buffer_p->private_data) + +static inline dma_addr_t +snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) +{ + struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); + return snd_sgbuf_get_addr(sg, ofs); +} + +static inline void * +snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) +{ + struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream); + return snd_sgbuf_get_ptr(sg, ofs); +} + +struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, + unsigned long offset); +unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, + unsigned int ofs, unsigned int size); + +#else /* !SND_DMA_SGBUF */ +/* + * fake using a continuous buffer + */ +static inline dma_addr_t +snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) +{ + return substream->runtime->dma_addr + ofs; +} + +static inline void * +snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) +{ + return substream->runtime->dma_area + ofs; +} + +#define snd_pcm_sgbuf_ops_page NULL + +#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size) (size) + +#endif /* SND_DMA_SGBUF */ + +/* handle mmap counter - PCM mmap callback should handle this counter properly */ +static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) +{ + struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; + atomic_inc(&substream->mmap_count); +} + +static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) +{ + struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; + atomic_dec(&substream->mmap_count); +} + +int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *area); +/* mmap for io-memory area */ +#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) +#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP +int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); +#else +#define SNDRV_PCM_INFO_MMAP_IOMEM 0 +#define snd_pcm_lib_mmap_iomem NULL +#endif + +#define snd_pcm_lib_mmap_vmalloc NULL + +static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) +{ + *max = dma < 4 ? 64 * 1024 : 128 * 1024; +} + +/* + * Misc + */ + +#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ + (IEC958_AES1_CON_ORIGINAL<<8)|\ + (IEC958_AES1_CON_PCM_CODER<<8)|\ + (IEC958_AES3_CON_FS_48000<<24)) + +#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) + +const char *snd_pcm_format_name(snd_pcm_format_t format); + +#endif /* __SOUND_PCM_H */ |