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kernel-ark/include/sound/pcm.h
Takashi Iwai 1b44c28dc1 [ALSA] Another fix for DocBook 
PCM Midlevel
Revive snd_pcm_format_cpu_endian() document.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-12 10:48:30 +02:00

1038 lines
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#ifndef __SOUND_PCM_H
#define __SOUND_PCM_H
/*
* Digital Audio (PCM) abstract layer
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
* Abramo Bagnara <abramo@alsa-project.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/asound.h>
#include <sound/memalloc.h>
#include <linux/poll.h>
#include <linux/bitops.h>
typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
typedef enum sndrv_pcm_class snd_pcm_class_t;
typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
typedef enum sndrv_pcm_stream snd_pcm_stream_t;
typedef enum sndrv_pcm_access snd_pcm_access_t;
typedef enum sndrv_pcm_format snd_pcm_format_t;
typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
typedef enum sndrv_pcm_state snd_pcm_state_t;
typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
typedef struct sndrv_pcm_info snd_pcm_info_t;
typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
typedef enum sndrv_pcm_start snd_pcm_start_t;
typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
typedef struct sndrv_pcm_status snd_pcm_status_t;
typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
typedef struct sndrv_mask snd_mask_t;
typedef struct snd_sg_buf snd_pcm_sgbuf_t;
#define snd_pcm_substream_chip(substream) ((substream)->private_data)
#define snd_pcm_chip(pcm) ((pcm)->private_data)
typedef struct _snd_pcm_file snd_pcm_file_t;
typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
#include "pcm_oss.h"
#endif
/*
* Hardware (lowlevel) section
*/
typedef struct _snd_pcm_hardware {
unsigned int info; /* SNDRV_PCM_INFO_* */
u64 formats; /* SNDRV_PCM_FMTBIT_* */
unsigned int rates; /* SNDRV_PCM_RATE_* */
unsigned int rate_min; /* min rate */
unsigned int rate_max; /* max rate */
unsigned int channels_min; /* min channels */
unsigned int channels_max; /* max channels */
size_t buffer_bytes_max; /* max buffer size */
size_t period_bytes_min; /* min period size */
size_t period_bytes_max; /* max period size */
unsigned int periods_min; /* min # of periods */
unsigned int periods_max; /* max # of periods */
size_t fifo_size; /* fifo size in bytes */
} snd_pcm_hardware_t;
typedef struct _snd_pcm_ops {
int (*open)(snd_pcm_substream_t *substream);
int (*close)(snd_pcm_substream_t *substream);
int (*ioctl)(snd_pcm_substream_t * substream,
unsigned int cmd, void *arg);
int (*hw_params)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
int (*hw_free)(snd_pcm_substream_t *substream);
int (*prepare)(snd_pcm_substream_t * substream);
int (*trigger)(snd_pcm_substream_t * substream, int cmd);
snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
void __user *buf, snd_pcm_uframes_t count);
int (*silence)(snd_pcm_substream_t *substream, int channel,
snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
int (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
int (*ack)(snd_pcm_substream_t *substream);
} snd_pcm_ops_t;
/*
*
*/
#define SNDRV_PCM_DEVICES 8
#define SNDRV_PCM_IOCTL1_FALSE ((void *)0)
#define SNDRV_PCM_IOCTL1_TRUE ((void *)1)
#define SNDRV_PCM_IOCTL1_RESET 0
#define SNDRV_PCM_IOCTL1_INFO 1
#define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
#define SNDRV_PCM_IOCTL1_GSTATE 3
#define SNDRV_PCM_TRIGGER_STOP 0
#define SNDRV_PCM_TRIGGER_START 1
#define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
#define SNDRV_PCM_TRIGGER_SUSPEND 5
#define SNDRV_PCM_TRIGGER_RESUME 6
#define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
/* If you change this don't forget to change rates[] table in pcm_native.c */
#define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
#define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
#define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
#define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
#define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
#define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
#define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
#define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
#define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
#define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
#define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
#define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
#define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
#define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
#define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
#define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
#define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
#define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
#define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
SNDRV_PCM_RATE_192000)
#define SNDRV_PCM_FMTBIT_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
#ifdef SNDRV_LITTLE_ENDIAN
#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
#endif
#ifdef SNDRV_BIG_ENDIAN
#define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
#define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
#define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
#define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
#define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
#define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
#define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
#define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
#endif
struct _snd_pcm_file {
snd_pcm_substream_t * substream;
struct _snd_pcm_file * next;
};
typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
snd_pcm_hw_rule_t *rule);
struct _snd_pcm_hw_rule {
unsigned int cond;
snd_pcm_hw_rule_func_t func;
int var;
int deps[4];
void *private;
};
typedef struct _snd_pcm_hw_constraints {
snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
unsigned int rules_num;
unsigned int rules_all;
snd_pcm_hw_rule_t *rules;
} snd_pcm_hw_constraints_t;
static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
snd_pcm_hw_param_t var)
{
return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}
static inline snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
snd_pcm_hw_param_t var)
{
return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}
typedef struct {
unsigned int num;
unsigned int den_min, den_max, den_step;
} ratnum_t;
typedef struct {
unsigned int num_min, num_max, num_step;
unsigned int den;
} ratden_t;
typedef struct {
int nrats;
ratnum_t *rats;
} snd_pcm_hw_constraint_ratnums_t;
typedef struct {
int nrats;
ratden_t *rats;
} snd_pcm_hw_constraint_ratdens_t;
typedef struct {
unsigned int count;
unsigned int *list;
unsigned int mask;
} snd_pcm_hw_constraint_list_t;
struct _snd_pcm_runtime {
/* -- Status -- */
snd_pcm_substream_t *trigger_master;
snd_timestamp_t trigger_tstamp; /* trigger timestamp */
int overrange;
snd_pcm_uframes_t avail_max;
snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time*/
/* -- HW params -- */
snd_pcm_access_t access; /* access mode */
snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
snd_pcm_subformat_t subformat; /* subformat */
unsigned int rate; /* rate in Hz */
unsigned int channels; /* channels */
snd_pcm_uframes_t period_size; /* period size */
unsigned int periods; /* periods */
snd_pcm_uframes_t buffer_size; /* buffer size */
unsigned int tick_time; /* tick time */
snd_pcm_uframes_t min_align; /* Min alignment for the format */
size_t byte_align;
unsigned int frame_bits;
unsigned int sample_bits;
unsigned int info;
unsigned int rate_num;
unsigned int rate_den;
/* -- SW params -- */
int tstamp_timespec; /* use timeval (0) or timespec (1) */
snd_pcm_tstamp_t tstamp_mode; /* mmap timestamp is updated */
unsigned int period_step;
unsigned int sleep_min; /* min ticks to sleep */
snd_pcm_uframes_t xfer_align; /* xfer size need to be a multiple */
snd_pcm_uframes_t start_threshold;
snd_pcm_uframes_t stop_threshold;
snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
noise is nearest than this */
snd_pcm_uframes_t silence_size; /* Silence filling size */
snd_pcm_uframes_t boundary; /* pointers wrap point */
snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
snd_pcm_uframes_t silence_filled; /* size filled with silence */
snd_pcm_sync_id_t sync; /* hardware synchronization ID */
/* -- mmap -- */
volatile snd_pcm_mmap_status_t *status;
volatile snd_pcm_mmap_control_t *control;
atomic_t mmap_count;
/* -- locking / scheduling -- */
wait_queue_head_t sleep;
struct timer_list tick_timer;
struct fasync_struct *fasync;
/* -- private section -- */
void *private_data;
void (*private_free)(snd_pcm_runtime_t *runtime);
/* -- hardware description -- */
snd_pcm_hardware_t hw;
snd_pcm_hw_constraints_t hw_constraints;
/* -- interrupt callbacks -- */
void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
void (*transfer_ack_end)(snd_pcm_substream_t *substream);
/* -- timer -- */
unsigned int timer_resolution; /* timer resolution */
/* -- DMA -- */
unsigned char *dma_area; /* DMA area */
dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
size_t dma_bytes; /* size of DMA area */
struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
/* -- OSS things -- */
snd_pcm_oss_runtime_t oss;
#endif
};
typedef struct _snd_pcm_group { /* keep linked substreams */
spinlock_t lock;
struct list_head substreams;
int count;
} snd_pcm_group_t;
struct _snd_pcm_substream {
snd_pcm_t *pcm;
snd_pcm_str_t *pstr;
void *private_data; /* copied from pcm->private_data */
int number;
char name[32]; /* substream name */
int stream; /* stream (direction) */
size_t buffer_bytes_max; /* limit ring buffer size */
struct snd_dma_buffer dma_buffer;
unsigned int dma_buf_id;
size_t dma_max;
/* -- hardware operations -- */
snd_pcm_ops_t *ops;
/* -- runtime information -- */
snd_pcm_runtime_t *runtime;
/* -- timer section -- */
snd_timer_t *timer; /* timer */
unsigned timer_running: 1; /* time is running */
spinlock_t timer_lock;
/* -- next substream -- */
snd_pcm_substream_t *next;
/* -- linked substreams -- */
struct list_head link_list; /* linked list member */
snd_pcm_group_t self_group; /* fake group for non linked substream (with substream lock inside) */
snd_pcm_group_t *group; /* pointer to current group */
/* -- assigned files -- */
snd_pcm_file_t *file;
struct file *ffile;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
/* -- OSS things -- */
snd_pcm_oss_substream_t oss;
#endif
snd_info_entry_t *proc_root;
snd_info_entry_t *proc_info_entry;
snd_info_entry_t *proc_hw_params_entry;
snd_info_entry_t *proc_sw_params_entry;
snd_info_entry_t *proc_status_entry;
snd_info_entry_t *proc_prealloc_entry;
/* misc flags */
unsigned int no_mmap_ctrl: 1;
};
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
#else
#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
#endif
struct _snd_pcm_str {
int stream; /* stream (direction) */
snd_pcm_t *pcm;
/* -- substreams -- */
unsigned int substream_count;
unsigned int substream_opened;
snd_pcm_substream_t *substream;
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
/* -- OSS things -- */
snd_pcm_oss_stream_t oss;
#endif
snd_pcm_file_t *files;
snd_minor_t *reg;
snd_info_entry_t *proc_root;
snd_info_entry_t *proc_info_entry;
#ifdef CONFIG_SND_DEBUG
unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
snd_info_entry_t *proc_xrun_debug_entry;
#endif
};
struct _snd_pcm {
snd_card_t *card;
unsigned int device; /* device number */
unsigned int info_flags;
unsigned short dev_class;
unsigned short dev_subclass;
char id[64];
char name[80];
snd_pcm_str_t streams[2];
struct semaphore open_mutex;
wait_queue_head_t open_wait;
void *private_data;
void (*private_free) (snd_pcm_t *pcm);
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
snd_pcm_oss_t oss;
#endif
};
typedef struct _snd_pcm_notify {
int (*n_register) (snd_pcm_t * pcm);
int (*n_disconnect) (snd_pcm_t * pcm);
int (*n_unregister) (snd_pcm_t * pcm);
struct list_head list;
} snd_pcm_notify_t;
/*
* Registering
*/
extern snd_pcm_t *snd_pcm_devices[];
extern snd_minor_t snd_pcm_reg[2];
int snd_pcm_new(snd_card_t * card, char *id, int device,
int playback_count, int capture_count,
snd_pcm_t **rpcm);
int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
/*
* Native I/O
*/
extern rwlock_t snd_pcm_link_rwlock;
int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
int snd_pcm_prepare(snd_pcm_substream_t *substream);
int snd_pcm_start(snd_pcm_substream_t *substream);
int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
int snd_pcm_drain_done(snd_pcm_substream_t *substream);
#ifdef CONFIG_PM
int snd_pcm_suspend(snd_pcm_substream_t *substream);
int snd_pcm_suspend_all(snd_pcm_t *pcm);
#endif
int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
void snd_pcm_release_substream(snd_pcm_substream_t *substream);
void snd_pcm_vma_notify_data(void *client, void *data);
int snd_pcm_mmap_data(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
#if BITS_PER_LONG >= 64
static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
*rem = *n % div;
*n /= div;
}
#elif defined(i386)
static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
u_int32_t low, high;
low = *n & 0xffffffff;
high = *n >> 32;
if (high) {
u_int32_t high1 = high % div;
high /= div;
asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
*n = (u_int64_t)high << 32 | low;
} else {
*n = low / div;
*rem = low % div;
}
}
#else
static inline void divl(u_int32_t high, u_int32_t low,
u_int32_t div,
u_int32_t *q, u_int32_t *r)
{
u_int64_t n = (u_int64_t)high << 32 | low;
u_int64_t d = (u_int64_t)div << 31;
u_int32_t q1 = 0;
int c = 32;
while (n > 0xffffffffU) {
q1 <<= 1;
if (n >= d) {
n -= d;
q1 |= 1;
}
d >>= 1;
c--;
}
q1 <<= c;
if (n) {
low = n;
*q = q1 | (low / div);
*r = low % div;
} else {
*r = 0;
*q = q1;
}
return;
}
static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
{
u_int32_t low, high;
low = *n & 0xffffffff;
high = *n >> 32;
if (high) {
u_int32_t high1 = high % div;
u_int32_t low1 = low;
high /= div;
divl(high1, low1, div, &low, rem);
*n = (u_int64_t)high << 32 | low;
} else {
*n = low / div;
*rem = low % div;
}
}
#endif
/*
* PCM library
*/
static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
{
return substream->group != &substream->self_group;
}
static inline void snd_pcm_stream_lock(snd_pcm_substream_t *substream)
{
read_lock(&snd_pcm_link_rwlock);
spin_lock(&substream->self_group.lock);
}
static inline void snd_pcm_stream_unlock(snd_pcm_substream_t *substream)
{
spin_unlock(&substream->self_group.lock);
read_unlock(&snd_pcm_link_rwlock);
}
static inline void snd_pcm_stream_lock_irq(snd_pcm_substream_t *substream)
{
read_lock_irq(&snd_pcm_link_rwlock);
spin_lock(&substream->self_group.lock);
}
static inline void snd_pcm_stream_unlock_irq(snd_pcm_substream_t *substream)
{
spin_unlock(&substream->self_group.lock);
read_unlock_irq(&snd_pcm_link_rwlock);
}
#define snd_pcm_stream_lock_irqsave(substream, flags) \
do { \
read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
spin_lock(&substream->self_group.lock); \
} while (0)
#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
do { \
spin_unlock(&substream->self_group.lock); \
read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
} while (0)
#define snd_pcm_group_for_each(pos, substream) \
list_for_each(pos, &substream->group->substreams)
#define snd_pcm_group_substream_entry(pos) \
list_entry(pos, snd_pcm_substream_t, link_list)
static inline int snd_pcm_running(snd_pcm_substream_t *substream)
{
return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
}
static inline ssize_t bytes_to_samples(snd_pcm_runtime_t *runtime, ssize_t size)
{
return size * 8 / runtime->sample_bits;
}
static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *runtime, ssize_t size)
{
return size * 8 / runtime->frame_bits;
}
static inline ssize_t samples_to_bytes(snd_pcm_runtime_t *runtime, ssize_t size)
{
return size * runtime->sample_bits / 8;
}
static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
{
return size * runtime->frame_bits / 8;
}
static inline int frame_aligned(snd_pcm_runtime_t *runtime, ssize_t bytes)
{
return bytes % runtime->byte_align == 0;
}
static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return frames_to_bytes(runtime, runtime->buffer_size);
}
static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return frames_to_bytes(runtime, runtime->period_size);
}
/*
* result is: 0 ... (boundary - 1)
*/
static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtime)
{
snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
if (avail < 0)
avail += runtime->boundary;
else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
avail -= runtime->boundary;
return avail;
}
/*
* result is: 0 ... (boundary - 1)
*/
static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
{
snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
if (avail < 0)
avail += runtime->boundary;
return avail;
}
static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
{
return runtime->buffer_size - snd_pcm_playback_avail(runtime);
}
static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(snd_pcm_runtime_t *runtime)
{
return runtime->buffer_size - snd_pcm_capture_avail(runtime);
}
/**
* snd_pcm_playback_ready - check whether the playback buffer is available
* @substream: the pcm substream instance
*
* Checks whether enough free space is available on the playback buffer.
*
* Returns non-zero if available, or zero if not.
*/
static inline int snd_pcm_playback_ready(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
}
/**
* snd_pcm_capture_ready - check whether the capture buffer is available
* @substream: the pcm substream instance
*
* Checks whether enough capture data is available on the capture buffer.
*
* Returns non-zero if available, or zero if not.
*/
static inline int snd_pcm_capture_ready(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
}
/**
* snd_pcm_playback_data - check whether any data exists on the playback buffer
* @substream: the pcm substream instance
*
* Checks whether any data exists on the playback buffer. If stop_threshold
* is bigger or equal to boundary, then this function returns always non-zero.
*
* Returns non-zero if exists, or zero if not.
*/
static inline int snd_pcm_playback_data(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
if (runtime->stop_threshold >= runtime->boundary)
return 1;
return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
}
/**
* snd_pcm_playback_empty - check whether the playback buffer is empty
* @substream: the pcm substream instance
*
* Checks whether the playback buffer is empty.
*
* Returns non-zero if empty, or zero if not.
*/
static inline int snd_pcm_playback_empty(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
}
/**
* snd_pcm_capture_empty - check whether the capture buffer is empty
* @substream: the pcm substream instance
*
* Checks whether the capture buffer is empty.
*
* Returns non-zero if empty, or zero if not.
*/
static inline int snd_pcm_capture_empty(snd_pcm_substream_t *substream)
{
snd_pcm_runtime_t *runtime = substream->runtime;
return snd_pcm_capture_avail(runtime) == 0;
}
static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
snd_pcm_substream_t *master)
{
substream->runtime->trigger_master = master;
}
static inline int hw_is_mask(int var)
{
return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
}
static inline int hw_is_interval(int var)
{
return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
}
static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var)
{
return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
}
static inline snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var)
{
return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
}
static inline const snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var)
{
return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
}
static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var)
{
return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
}
#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
#define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b,
unsigned int k, snd_interval_t *c);
void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
const snd_interval_t *b, snd_interval_t *c);
int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
int snd_interval_ratnum(snd_interval_t *i,
unsigned int rats_count, ratnum_t *rats,
unsigned int *nump, unsigned int *denp);
void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);
void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
int snd_pcm_hw_param_near(snd_pcm_substream_t *substream,
snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var,
unsigned int val, int *dir);
int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var,
unsigned int val, int dir);
int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
u_int32_t mask);
int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
u_int64_t mask);
int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
unsigned int min, unsigned int max);
int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
snd_pcm_hw_constraint_list_t *l);
int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
snd_pcm_hw_constraint_ratnums_t *r);
int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
snd_pcm_hw_constraint_ratdens_t *r);
int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime,
unsigned int cond,
unsigned int width,
unsigned int msbits);
int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
unsigned int cond,
snd_pcm_hw_param_t var,
unsigned long step);
int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
unsigned int cond,
snd_pcm_hw_param_t var);
int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime,
unsigned int cond,
int var,
snd_pcm_hw_rule_func_t func, void *private,
int dep, ...);
int snd_pcm_format_signed(snd_pcm_format_t format);
int snd_pcm_format_unsigned(snd_pcm_format_t format);
int snd_pcm_format_linear(snd_pcm_format_t format);
int snd_pcm_format_little_endian(snd_pcm_format_t format);
int snd_pcm_format_big_endian(snd_pcm_format_t format);
#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);
const char *snd_pcm_format_name(snd_pcm_format_t format);
void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
void snd_pcm_set_sync(snd_pcm_substream_t * substream);
int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
unsigned int cmd, void *arg);
int snd_pcm_update_hw_ptr(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
const void __user *buf,
snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
void __user *buf, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
void __user **bufs, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
void __user **bufs, snd_pcm_uframes_t frames);
int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
struct snd_dma_buffer *bufp)
{
snd_pcm_runtime_t *runtime = substream->runtime;
if (bufp) {
runtime->dma_buffer_p = bufp;
runtime->dma_area = bufp->area;
runtime->dma_addr = bufp->addr;
runtime->dma_bytes = bufp->bytes;
} else {
runtime->dma_buffer_p = NULL;
runtime->dma_area = NULL;
runtime->dma_addr = 0;
runtime->dma_bytes = 0;
}
}
/*
* Timer interface
*/
void snd_pcm_timer_resolution_change(snd_pcm_substream_t *substream);
void snd_pcm_timer_init(snd_pcm_substream_t * substream);
void snd_pcm_timer_done(snd_pcm_substream_t * substream);
/*
* Memory
*/
int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
int type, struct device *data,
size_t size, size_t max);
int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *pcm,
int type, void *data,
size_t size, size_t max);
int snd_pcm_lib_malloc_pages(snd_pcm_substream_t *substream, size_t size);
int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
#define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
#define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
/* handle mmap counter - PCM mmap callback should handle this counter properly */
static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
{
snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
atomic_inc(&substream->runtime->mmap_count);
}
static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
{
snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
atomic_dec(&substream->runtime->mmap_count);
}
/* mmap for io-memory area */
#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
#define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
int snd_pcm_lib_mmap_iomem(snd_pcm_substream_t *substream, struct vm_area_struct *area);
#else
#define SNDRV_PCM_INFO_MMAP_IOMEM 0
#define snd_pcm_lib_mmap_iomem NULL
#endif
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
{
*max = dma < 4 ? 64 * 1024 : 128 * 1024;
}
/*
* Misc
*/
#define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
(IEC958_AES1_CON_ORIGINAL<<8)|\
(IEC958_AES1_CON_PCM_CODER<<8)|\
(IEC958_AES3_CON_FS_48000<<24))
#endif /* __SOUND_PCM_H */
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