cregit-Linux how code gets into the kernel

Release 4.12 include/sound/pcm.h

Directory: include/sound
#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 <sound/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_audio_tstamp_config; /* definitions further down */
struct snd_pcm_audio_tstamp_report;


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 (*get_time_info)(struct snd_pcm_substream *substream,
			struct timespec *system_ts, struct timespec *audio_ts,
			struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
			struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
	
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_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_TRIGGER_DRAIN		7


#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)

#define SNDRV_PCM_FMTBIT_DSD_U8		_SNDRV_PCM_FMTBIT(DSD_U8)

#define SNDRV_PCM_FMTBIT_DSD_U16_LE	_SNDRV_PCM_FMTBIT(DSD_U16_LE)

#define SNDRV_PCM_FMTBIT_DSD_U32_LE	_SNDRV_PCM_FMTBIT(DSD_U32_LE)

#define SNDRV_PCM_FMTBIT_DSD_U16_BE	_SNDRV_PCM_FMTBIT(DSD_U16_BE)

#define SNDRV_PCM_FMTBIT_DSD_U32_BE	_SNDRV_PCM_FMTBIT(DSD_U32_BE)

#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;
	
int var;
	
int deps[4];

	
snd_pcm_hw_rule_func_t func;
	
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]; }

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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]; }

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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; const struct snd_ratnum *rats; }; struct snd_pcm_hw_constraint_ratdens { int nrats; const struct snd_ratden *rats; }; struct snd_pcm_hw_constraint_list { const unsigned int *list; unsigned int count; unsigned int mask; }; struct snd_pcm_hw_constraint_ranges { unsigned int count; const struct snd_interval *ranges; unsigned int mask; }; /* * userspace-provided audio timestamp config to kernel, * structure is for internal use only and filled with dedicated unpack routine */ struct snd_pcm_audio_tstamp_config { /* 5 of max 16 bits used */ u32 type_requested:4; u32 report_delay:1; /* add total delay to A/D or D/A */ };
static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, struct snd_pcm_audio_tstamp_config *config) { config->type_requested = data & 0xF; config->report_delay = (data >> 4) & 1; }

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/* * kernel-provided audio timestamp report to user-space * structure is for internal use only and read by dedicated pack routine */ struct snd_pcm_audio_tstamp_report { /* 6 of max 16 bits used for bit-fields */ /* for backwards compatibility */ u32 valid:1; /* actual type if hardware could not support requested timestamp */ u32 actual_type:4; /* accuracy represented in ns units */ u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ u32 accuracy; /* up to 4.29s, will be packed in separate field */ };
static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, const struct snd_pcm_audio_tstamp_report *report) { u32 tmp; tmp = report->accuracy_report; tmp <<= 4; tmp |= report->actual_type; tmp <<= 1; tmp |= report->valid; *data &= 0xffff; /* zero-clear MSBs */ *data |= (tmp << 16); *accuracy = report->accuracy; }

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struct snd_pcm_runtime { /* -- Status -- */ struct snd_pcm_substream *trigger_master; struct timespec trigger_tstamp; /* trigger timestamp */ bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ 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 */ u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ /* -- 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; /* -- 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 */ /* -- audio timestamp config -- */ struct snd_pcm_audio_tstamp_config audio_tstamp_config; struct snd_pcm_audio_tstamp_report audio_tstamp_report; struct timespec driver_tstamp; #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) /* -- OSS things -- */ struct snd_pcm_oss_runtime oss; #endif }; struct snd_pcm_group { /* keep linked substreams */ spinlock_t lock; struct mutex mutex; 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; size_t dma_max; /* -- hardware operations -- */ const 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; #ifdef CONFIG_SND_PCM_XRUN_DEBUG struct snd_info_entry *proc_xrun_injection_entry; #endif #endif /* CONFIG_SND_VERBOSE_PROCFS */ /* 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_kcontrol *chmap_kctl; /* channel-mapping controls */ struct device dev; }; 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); bool internal; /* pcm is for internal use only */ bool nonatomic; /* whole PCM operations are in non-atomic context */ #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 */ 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); int snd_pcm_stop_xrun(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); #else
static inline int snd_pcm_suspend(struct snd_pcm_substream *substream) { return 0; }

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static inline int snd_pcm_suspend_all(struct snd_pcm *pcm) { return 0; }

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#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); 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; }

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#endif /* * PCM library */ /** * snd_pcm_stream_linked - Check whether the substream is linked with others * @substream: substream to check * * Returns true if the given substream is being linked with others. */
static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) { return substream->group != &substream->self_group; }

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void snd_pcm_stream_lock(struct snd_pcm_substream *substream); void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); /** * snd_pcm_stream_lock_irqsave - Lock the PCM stream * @substream: PCM substream * @flags: irq flags * * This locks the PCM stream like snd_pcm_stream_lock() but with the local * IRQ (only when nonatomic is false). In nonatomic case, this is identical * as snd_pcm_stream_lock(). */ #define snd_pcm_stream_lock_irqsave(substream, flags) \ do { \ typecheck(unsigned long, flags); \ flags = _snd_pcm_stream_lock_irqsave(substream); \ } while (0) void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, unsigned long flags); /** * snd_pcm_group_for_each_entry - iterate over the linked substreams * @s: the iterator * @substream: the substream * * Iterate over the all linked substreams to the given @substream. * When @substream isn't linked with any others, this gives returns @substream * itself once. */ #define snd_pcm_group_for_each_entry(s, substream) \ list_for_each_entry(s, &substream->group->substreams, link_list) /** * snd_pcm_running - Check whether the substream is in a running state * @substream: substream to check * * Returns true if the given substream is in the state RUNNING, or in the * state DRAINING for playback. */
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)); }

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/** * bytes_to_samples - Unit conversion of the size from bytes to samples * @runtime: PCM runtime instance * @size: size in bytes */
static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) { return size * 8 / runtime->sample_bits; }

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/** * bytes_to_frames - Unit conversion of the size from bytes to frames * @runtime: PCM runtime instance * @size: size in bytes */
static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) { return size * 8 / runtime->frame_bits; }

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/** * samples_to_bytes - Unit conversion of the size from samples to bytes * @runtime: PCM runtime instance * @size: size in samples */
static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) { return size * runtime->sample_bits / 8; }

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/** * frames_to_bytes - Unit conversion of the size from frames to bytes * @runtime: PCM runtime instance * @size: size in frames */
static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) { return size * runtime->frame_bits / 8; }

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/** * frame_aligned - Check whether the byte size is aligned to frames * @runtime: PCM runtime instance * @bytes: size in bytes */
static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) { return bytes % runtime->byte_align == 0; }

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/** * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes * @substream: PCM substream */
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); }

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/** * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes * @substream: PCM substream */
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); }

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/** * snd_pcm_playback_avail - Get the available (writable) space for playback * @runtime: PCM runtime instance * * Result is between 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; }

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/** * snd_pcm_playback_avail - Get the available (readable) space for capture * @runtime: PCM runtime instance * * Result is between 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; }

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/** * snd_pcm_playback_hw_avail - Get the queued space for playback * @runtime: PCM runtime instance */
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); }

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/** * snd_pcm_capture_hw_avail - Get the free space for capture * @runtime: PCM runtime instance */
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); }

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/** * 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. * * Return: 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; }

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/** * 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. * * Return: 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; }

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/** * 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. * * Return: Non-zero if any data exists, or zero if not. If stop_threshold * is bigger or equal to boundary, then this function returns always non-zero. */
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; }

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/** * snd_pcm_playback_empty - check whether the playback buffer is empty * @substream: the pcm substream instance * * Checks whether the playback buffer is empty. * * Return: 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; }

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/** * snd_pcm_capture_empty - check whether the capture buffer is empty * @substream: the pcm substream instance * * Checks whether the capture buffer is empty. * * Return: 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; }

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/** * snd_pcm_trigger_done - Mark the master substream * @substream: the pcm substream instance * @master: the linked master substream * * When multiple substreams of the same card are linked and the hardware * supports the single-shot operation, the driver calls this in the loop * in snd_pcm_group_for_each_entry() for marking the substream as "done". * Then most of trigger operations are performed only to the given master * substream. * * The trigger_master mark is cleared at timestamp updates at the end * of trigger operations. */
static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, struct snd_pcm_substream *master) { substream->runtime->trigger_master = master; }

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static inline int hw_is_mask(int var) { return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && var <= SNDRV_PCM_HW_PARAM_LAST_MASK; }

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static inline int hw_is_interval(int var) { return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; }

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static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; }

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static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; }

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static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; }

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static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var) { return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; }

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/** * params_channels - Get the number of channels from the hw params * @p: hw params */
static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; }

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/** * params_rate - Get the sample rate from the hw params * @p: hw params */
static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; }

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/** * params_period_size - Get the period size (in frames) from the hw params * @p: hw params */
static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; }

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/** * params_periods - Get the number of periods from the hw params * @p: hw params */
static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; }

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/** * params_buffer_size - Get the buffer size (in frames) from the hw params * @p: hw params */
static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; }

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/** * params_buffer_bytes - Get the buffer size (in bytes) from the hw params * @p: hw params */
static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) { return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; }

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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_ranges(struct snd_interval *i, unsigned int count, const struct snd_interval *list, unsigned int mask); int snd_interval_ratnum(struct snd_interval *i, unsigned int rats_count, const 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, const struct snd_pcm_hw_constraint_list *l); int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, const struct snd_pcm_hw_constraint_ranges *r); int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, unsigned int cond, snd_pcm_hw_param_t var, const 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, const 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, ...); /** * snd_pcm_hw_constraint_single() - Constrain parameter to a single value * @runtime: PCM runtime instance * @var: The hw_params variable to constrain * @val: The value to constrain to * * Return: Positive if the value is changed, zero if it's not changed, or a * negative error code. */
static inline int snd_pcm_hw_constraint_single( struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, unsigned int val) { return snd_pcm_hw_constraint_minmax(runtime, var, val, val); }

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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 * * Return: 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); void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, const struct snd_pcm_ops *ops); void snd_pcm_set_sync(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); 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); unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, unsigned int rates_b); unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, unsigned int rate_max); /** * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer * @substream: PCM substream to set * @bufp: the buffer information, NULL to clear * * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. * Otherwise it clears the current buffer information. */
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; } }

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/* * Timer interface */ #ifdef CONFIG_SND_PCM_TIMER 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); #else
static inline void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}

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static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}

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static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}

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#endif /** * snd_pcm_gettime - Fill the timespec depending on the timestamp mode * @runtime: PCM runtime instance * @tv: timespec to fill */
static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, struct timespec *tv) { switch (runtime->tstamp_type) { case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: ktime_get_ts(tv); break; case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: getrawmonotonic(tv); break; default: getnstimeofday(tv); break; } }

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Jaroslav Kysela3162.00%133.33%
Mark Brown1836.00%133.33%
Thomas Gleixner12.00%133.33%
Total50100.00%3100.00%

/* * 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); /** * 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. * * Return: 1 if the buffer was changed, 0 if not changed, or a negative error * code. */
static inline int snd_pcm_lib_alloc_vmalloc_buffer (struct snd_pcm_substream *substream, size_t size) { return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); }

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Takashi Iwai2482.76%150.00%
Clemens Ladisch517.24%150.00%
Total29100.00%2100.00%

/** * 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. * * Return: 1 if the buffer was changed, 0 if not changed, or a negative error * code. */
static inline int snd_pcm_lib_alloc_vmalloc_32_buffer (struct snd_pcm_substream *substream, size_t size) { return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); }

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Takashi Iwai2482.76%150.00%
Clemens Ladisch517.24%150.00%
Total29100.00%2100.00%

#define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) #ifdef CONFIG_SND_DMA_SGBUF /* * SG-buffer handling */ #define snd_pcm_substream_sgbuf(substream) \ snd_pcm_get_dma_buf(substream)->private_data struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset); #else /* !SND_DMA_SGBUF */ /* * fake using a continuous buffer */ #define snd_pcm_sgbuf_ops_page NULL #endif /* SND_DMA_SGBUF */ /** * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset * @substream: PCM substream * @ofs: byte offset */
static inline dma_addr_t snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) { return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); }

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Takashi Iwai27100.00%2100.00%
Total27100.00%2100.00%

/** * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset * @substream: PCM substream * @ofs: byte offset */
static inline void * snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) { return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); }

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Takashi Iwai28100.00%2100.00%
Total28100.00%2100.00%

/** * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. * page from the given size * @substream: PCM substream * @ofs: byte offset * @size: byte size to examine */
static inline unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, unsigned int ofs, unsigned int size) { return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); }

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Takashi Iwai34100.00%2100.00%
Total34100.00%2100.00%

/** * snd_pcm_mmap_data_open - increase the mmap counter * @area: VMA * * 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); }

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Takashi Iwai34100.00%2100.00%
Total34100.00%2100.00%

/** * snd_pcm_mmap_data_close - decrease the mmap counter * @area: VMA * * PCM mmap callback should handle this counter properly */
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); }

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Takashi Iwai34100.00%2100.00%
Total34100.00%2100.00%

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 /** * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer * @dma: DMA number * @max: pointer to store the max size */
static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) { *max = dma < 4 ? 64 * 1024 : 128 * 1024; }

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Jaroslav Kysela29100.00%1100.00%
Total29100.00%1100.00%

/* * 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); /** * snd_pcm_stream_str - Get a string naming the direction of a stream * @substream: the pcm substream instance * * Return: A string naming the direction of the stream. */
static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) return "Playback"; else return "Capture"; }

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Ola Lilja29100.00%1100.00%
Total29100.00%1100.00%

/* * PCM channel-mapping control API */ /* array element of channel maps */ struct snd_pcm_chmap_elem { unsigned char channels; unsigned char map[15]; }; /* channel map information; retrieved via snd_kcontrol_chip() */ struct snd_pcm_chmap { struct snd_pcm *pcm; /* assigned PCM instance */ int stream; /* PLAYBACK or CAPTURE */ struct snd_kcontrol *kctl; const struct snd_pcm_chmap_elem *chmap; unsigned int max_channels; unsigned int channel_mask; /* optional: active channels bitmask */ void *private_data; /* optional: private data pointer */ }; /** * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info * @info: chmap information * @idx: the substream number index */
static inline struct snd_pcm_substream * snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) { struct snd_pcm_substream *s; for (s = info->pcm->streams[info->stream].substream; s; s = s->next) if (s->number == idx) return s; return NULL; }

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Takashi Iwai62100.00%1100.00%
Total62100.00%1100.00%

/* ALSA-standard channel maps (RL/RR prior to C/LFE) */ extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; /* Other world's standard channel maps (C/LFE prior to RL/RR) */ extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, const struct snd_pcm_chmap_elem *chmap, int max_channels, unsigned long private_value, struct snd_pcm_chmap **info_ret); /** * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise * @pcm_format: PCM format */
static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) { return 1ULL << (__force int) pcm_format; }

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Eldad Zack19100.00%1100.00%
Total19100.00%1100.00%

/* printk helpers */ #define pcm_err(pcm, fmt, args...) \ dev_err((pcm)->card->dev, fmt, ##args) #define pcm_warn(pcm, fmt, args...) \ dev_warn((pcm)->card->dev, fmt, ##args) #define pcm_dbg(pcm, fmt, args...) \ dev_dbg((pcm)->card->dev, fmt, ##args) #endif /* __SOUND_PCM_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Jaroslav Kysela308059.23%3629.27%
Takashi Iwai131625.31%3326.83%
Pierre-Louis Bossart2154.13%43.25%
Clemens Ladisch1472.83%97.32%
Peter Rosin641.23%10.81%
Lars-Peter Clausen641.23%75.69%
Eliot Blennerhassett470.90%10.81%
Jie Yang400.77%10.81%
Liam Girdwood330.63%10.81%
Ola Lilja290.56%10.81%
Mark Brown210.40%32.44%
Eldad Zack190.37%10.81%
Pawel Moll170.33%10.81%
Mengdong Lin130.25%10.81%
Benjamin Collins120.23%10.81%
Dimitris Papastamos90.17%10.81%
Al Viro90.17%21.63%
Yacine Belkadi80.15%10.81%
Daniel Mack80.15%10.81%
Jussi Laako80.15%10.81%
Martin Waitz80.15%10.81%
David S. Miller60.12%10.81%
Mark Gross50.10%10.81%
Libin Yang40.08%10.81%
Jurgen Kramer40.08%10.81%
Randy Dunlap30.06%10.81%
Dave Dillow20.04%10.81%
Jean Pihet20.04%21.63%
Tim Blechmann10.02%10.81%
Linus Torvalds10.02%10.81%
Arjan van de Ven10.02%10.81%
Thomas Gleixner10.02%10.81%
Ingo Molnar10.02%10.81%
David Howells10.02%10.81%
Benjamin Herrenschmidt10.02%10.81%
Total5200100.00%123100.00%
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