/*

 *  PCM Interface - local header file

 *  Copyright (c) 2000 by Jaroslav Kysela <perex@perex.cz>

 *                        Abramo Bagnara <abramo@alsa-project.org>

 *

 *

 *   This library is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as

 *   published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public

 *   License along with this library; if not, write to the Free Software

 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#include <stdio.h>

#include <stdlib.h>

#include <limits.h>

#include <sys/uio.h>

#include <time.h>

#include <sys/time.h>

#define _snd_mask sndrv_mask

#define _snd_pcm_access_mask _snd_mask

#define _snd_pcm_format_mask _snd_mask

#define _snd_pcm_subformat_mask _snd_mask

#include "local.h"

#ifdef THREAD_SAFE_API

#define __USE_UNIX98 1	/* for old glibc */

#include <pthread.h>

#endif

#define SND_INTERVAL_INLINE

#include "interval.h"

#define SND_MASK_INLINE

#include "mask.h"

#define SND_PCM_HW_PARAM_ACCESS SNDRV_PCM_HW_PARAM_ACCESS

#define SND_PCM_HW_PARAM_FIRST_MASK SNDRV_PCM_HW_PARAM_FIRST_MASK

#define SND_PCM_HW_PARAM_FORMAT SNDRV_PCM_HW_PARAM_FORMAT

#define SND_PCM_HW_PARAM_SUBFORMAT SNDRV_PCM_HW_PARAM_SUBFORMAT

#define SND_PCM_HW_PARAM_LAST_MASK SNDRV_PCM_HW_PARAM_LAST_MASK

#define SND_PCM_HW_PARAM_SAMPLE_BITS SNDRV_PCM_HW_PARAM_SAMPLE_BITS

#define SND_PCM_HW_PARAM_FIRST_INTERVAL SNDRV_PCM_HW_PARAM_FIRST_INTERVAL

#define SND_PCM_HW_PARAM_FRAME_BITS SNDRV_PCM_HW_PARAM_FRAME_BITS

#define SND_PCM_HW_PARAM_CHANNELS SNDRV_PCM_HW_PARAM_CHANNELS

#define SND_PCM_HW_PARAM_RATE SNDRV_PCM_HW_PARAM_RATE

#define SND_PCM_HW_PARAM_PERIOD_TIME SNDRV_PCM_HW_PARAM_PERIOD_TIME

#define SND_PCM_HW_PARAM_PERIOD_SIZE SNDRV_PCM_HW_PARAM_PERIOD_SIZE

#define SND_PCM_HW_PARAM_PERIOD_BYTES SNDRV_PCM_HW_PARAM_PERIOD_BYTES

#define SND_PCM_HW_PARAM_PERIODS SNDRV_PCM_HW_PARAM_PERIODS

#define SND_PCM_HW_PARAM_BUFFER_TIME SNDRV_PCM_HW_PARAM_BUFFER_TIME

#define SND_PCM_HW_PARAM_BUFFER_SIZE SNDRV_PCM_HW_PARAM_BUFFER_SIZE

#define SND_PCM_HW_PARAM_BUFFER_BYTES SNDRV_PCM_HW_PARAM_BUFFER_BYTES

#define SND_PCM_HW_PARAM_TICK_TIME SNDRV_PCM_HW_PARAM_TICK_TIME

#define SND_PCM_HW_PARAM_LAST_INTERVAL SNDRV_PCM_HW_PARAM_LAST_INTERVAL

#define SND_PCM_HW_PARAM_LAST_MASK SNDRV_PCM_HW_PARAM_LAST_MASK

#define SND_PCM_HW_PARAM_FIRST_MASK SNDRV_PCM_HW_PARAM_FIRST_MASK

#define SND_PCM_HW_PARAM_LAST_INTERVAL SNDRV_PCM_HW_PARAM_LAST_INTERVAL

#define SND_PCM_HW_PARAM_FIRST_INTERVAL SNDRV_PCM_HW_PARAM_FIRST_INTERVAL

/** device accepts mmaped access */

#define SND_PCM_INFO_MMAP SNDRV_PCM_INFO_MMAP

/** device accepts  mmaped access with sample resolution */

#define SND_PCM_INFO_MMAP_VALID SNDRV_PCM_INFO_MMAP_VALID

/** device is doing double buffering */

#define SND_PCM_INFO_DOUBLE SNDRV_PCM_INFO_DOUBLE

/** device transfers samples in batch */

#define SND_PCM_INFO_BATCH SNDRV_PCM_INFO_BATCH

/** device accepts interleaved samples */

#define SND_PCM_INFO_INTERLEAVED SNDRV_PCM_INFO_INTERLEAVED

/** device accepts non-interleaved samples */

#define SND_PCM_INFO_NONINTERLEAVED SNDRV_PCM_INFO_NONINTERLEAVED

/** device accepts complex sample organization */

#define SND_PCM_INFO_COMPLEX SNDRV_PCM_INFO_COMPLEX

/** device is capable block transfers */

#define SND_PCM_INFO_BLOCK_TRANSFER SNDRV_PCM_INFO_BLOCK_TRANSFER

/** device can detect DAC/ADC overrange */

#define SND_PCM_INFO_OVERRANGE SNDRV_PCM_INFO_OVERRANGE

/** device supports resume */

#define SND_PCM_INFO_RESUME SNDRV_PCM_INFO_RESUME

/** device is capable to pause */

#define SND_PCM_INFO_PAUSE SNDRV_PCM_INFO_PAUSE

/** device can do only half duplex */

#define SND_PCM_INFO_HALF_DUPLEX SNDRV_PCM_INFO_HALF_DUPLEX

/** device can do only joint duplex (same parameters) */

#define SND_PCM_INFO_JOINT_DUPLEX SNDRV_PCM_INFO_JOINT_DUPLEX

/** device can do a kind of synchronized start */

#define SND_PCM_INFO_SYNC_START SNDRV_PCM_INFO_SYNC_START

/** device can disable period wakeups */

#define SND_PCM_INFO_NO_PERIOD_WAKEUP SNDRV_PCM_INFO_NO_PERIOD_WAKEUP

#define SND_PCM_HW_PARAMS_NORESAMPLE SNDRV_PCM_HW_PARAMS_NORESAMPLE

#define SND_PCM_HW_PARAMS_EXPORT_BUFFER SNDRV_PCM_HW_PARAMS_EXPORT_BUFFER

#define SND_PCM_HW_PARAMS_NO_PERIOD_WAKEUP SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP

#define SND_PCM_INFO_MONOTONIC	0x80000000

typedef struct _snd_pcm_rbptr {

	snd_pcm_t *master;

	volatile snd_pcm_uframes_t *ptr;

	int fd;

	off_t offset;

	int link_dst_count;

	snd_pcm_t **link_dst;

	void *private_data;

	void (*changed)(snd_pcm_t *pcm, snd_pcm_t *src);

} snd_pcm_rbptr_t;

typedef struct _snd_pcm_channel_info {

	unsigned int channel;

	void *addr;			/* base address of channel samples */

	unsigned int first;		/* offset to first sample in bits */

	unsigned int step;		/* samples distance in bits */

	enum { SND_PCM_AREA_SHM, SND_PCM_AREA_MMAP, SND_PCM_AREA_LOCAL } type;

	union {

		struct {

			struct snd_shm_area *area;

			int shmid;

		} shm;

		struct {

			int fd;

			off_t offset;

		} mmap;

	} u;

	char reserved[64];

} snd_pcm_channel_info_t;

typedef struct {

	int (*close)(snd_pcm_t *pcm);

	int (*nonblock)(snd_pcm_t *pcm, int nonblock); /* always locked */

	int (*async)(snd_pcm_t *pcm, int sig, pid_t pid);

	int (*info)(snd_pcm_t *pcm, snd_pcm_info_t *info);

	int (*hw_refine)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);

	int (*hw_params)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);

	int (*hw_free)(snd_pcm_t *pcm);

	int (*sw_params)(snd_pcm_t *pcm, snd_pcm_sw_params_t *params); /* always locked */

	int (*channel_info)(snd_pcm_t *pcm, snd_pcm_channel_info_t *info);

	void (*dump)(snd_pcm_t *pcm, snd_output_t *out);

	int (*mmap)(snd_pcm_t *pcm);

	int (*munmap)(snd_pcm_t *pcm);

	snd_pcm_chmap_query_t **(*query_chmaps)(snd_pcm_t *pcm);

	snd_pcm_chmap_t *(*get_chmap)(snd_pcm_t *pcm);

	int (*set_chmap)(snd_pcm_t *pcm, const snd_pcm_chmap_t *map);

} snd_pcm_ops_t;

typedef struct {

	int (*status)(snd_pcm_t *pcm, snd_pcm_status_t *status); /* locked */

	int (*prepare)(snd_pcm_t *pcm); /* locked */

	int (*reset)(snd_pcm_t *pcm); /* locked */

	int (*start)(snd_pcm_t *pcm); /* locked */

	int (*drop)(snd_pcm_t *pcm); /* locked */

	int (*drain)(snd_pcm_t *pcm); /* need own locking */

	int (*pause)(snd_pcm_t *pcm, int enable); /* locked */

	snd_pcm_state_t (*state)(snd_pcm_t *pcm); /* locked */

	int (*hwsync)(snd_pcm_t *pcm); /* locked */

	int (*delay)(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp); /* locked */

	int (*resume)(snd_pcm_t *pcm); /* need own locking */

	int (*link)(snd_pcm_t *pcm1, snd_pcm_t *pcm2);

	int (*link_slaves)(snd_pcm_t *pcm, snd_pcm_t *master);

	int (*unlink)(snd_pcm_t *pcm);

	snd_pcm_sframes_t (*rewindable)(snd_pcm_t *pcm); /* locked */

	snd_pcm_sframes_t (*rewind)(snd_pcm_t *pcm, snd_pcm_uframes_t frames); /* locked */

	snd_pcm_sframes_t (*forwardable)(snd_pcm_t *pcm); /* locked */

	snd_pcm_sframes_t (*forward)(snd_pcm_t *pcm, snd_pcm_uframes_t frames); /* locked */

	snd_pcm_sframes_t (*writei)(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size); /* need own locking */

	snd_pcm_sframes_t (*writen)(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); /* need own locking */

	snd_pcm_sframes_t (*readi)(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size); /* need own locking */

	snd_pcm_sframes_t (*readn)(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size); /* need own locking */

	snd_pcm_sframes_t (*avail_update)(snd_pcm_t *pcm); /* locked */

	snd_pcm_sframes_t (*mmap_commit)(snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t size); /* locked */

	int (*htimestamp)(snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp); /* locked */

	int (*poll_descriptors_count)(snd_pcm_t *pcm); /* locked */

	int (*poll_descriptors)(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space); /* locked */

	int (*poll_revents)(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); /* locked */

	int (*may_wait_for_avail_min)(snd_pcm_t *pcm, snd_pcm_uframes_t avail);

	int (*mmap_begin)(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames); /* locked */

} snd_pcm_fast_ops_t;

struct _snd_pcm {

	void *open_func;

	char *name;

	snd_pcm_type_t type;

	snd_pcm_stream_t stream;

	int mode;

	long minperiodtime;		/* in us */

	int poll_fd_count;

	int poll_fd;

	unsigned short poll_events;

	int setup: 1,

	    compat: 1;

	snd_pcm_access_t access;	/* access mode */

	snd_pcm_format_t format;	/* SND_PCM_FORMAT_* */

	snd_pcm_subformat_t subformat;	/* subformat */

	unsigned int channels;		/* channels */

	unsigned int rate;		/* rate in Hz */

	snd_pcm_uframes_t period_size;

	unsigned int period_time;	/* period duration */

	snd_interval_t periods;

	snd_pcm_tstamp_t tstamp_mode;	/* timestamp mode */

	snd_pcm_tstamp_type_t tstamp_type;	/* timestamp type */

	unsigned int period_step;

	snd_pcm_uframes_t avail_min;	/* min avail frames for wakeup */

	int period_event;

	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 */

	unsigned int info;		/* Info for returned setup */

	unsigned int msbits;		/* used most significant bits */

	unsigned int rate_num;		/* rate numerator */

	unsigned int rate_den;		/* rate denominator */

	unsigned int hw_flags;		/* actual hardware flags */

	snd_pcm_uframes_t fifo_size;	/* chip FIFO size in frames */

	snd_pcm_uframes_t buffer_size;

	snd_interval_t buffer_time;

	unsigned int sample_bits;

	unsigned int frame_bits;

	snd_pcm_rbptr_t appl;

	snd_pcm_rbptr_t hw;

	snd_pcm_uframes_t min_align;

	unsigned int mmap_rw: 1;	/* use always mmapped buffer */

	unsigned int mmap_shadow: 1;	/* don't call actual mmap,

					 * use the mmaped buffer of the slave

					 */

	unsigned int donot_close: 1;	/* don't close this PCM */

	unsigned int own_state_check:1; /* plugin has own PCM state check */

	snd_pcm_channel_info_t *mmap_channels;

	snd_pcm_channel_area_t *running_areas;

	snd_pcm_channel_area_t *stopped_areas;

	const snd_pcm_ops_t *ops;

	const snd_pcm_fast_ops_t *fast_ops;

	snd_pcm_t *op_arg;

	snd_pcm_t *fast_op_arg;

	void *private_data;

	struct list_head async_handlers;

#ifdef THREAD_SAFE_API

	int need_lock;		/* true = this PCM (plugin) is thread-unsafe,

				 * thus it needs a lock.

				 */

	int lock_enabled;	/* thread-safety lock is enabled on the system;

				 * it's set depending on $LIBASOUND_THREAD_SAFE.

				 */

	pthread_mutex_t lock;

#endif

};

/* make local functions really local */

/* Grrr, these cannot be local - a bad aserver uses them!

#define snd_pcm_async \

	snd1_pcm_async

#define snd_pcm_mmap \

	snd1_pcm_mmap

#define snd_pcm_munmap \

	snd1_pcm_munmap

#define snd_pcm_hw_refine \

	snd1_pcm_hw_refine

*/

#define snd_pcm_new \

	snd1_pcm_new

#define snd_pcm_free \

	snd1_pcm_free

#define snd_pcm_areas_from_buf \

	snd1_pcm_areas_from_buf

#define snd_pcm_areas_from_bufs \

	snd1_pcm_areas_from_bufs

#define snd_pcm_open_named_slave \

	snd1_pcm_open_named_slave

#define snd_pcm_hw_open_fd \

	snd1_pcm_hw_open_fd

#define snd_pcm_wait_nocheck \

	snd1_pcm_wait_nocheck

#define snd_pcm_rate_get_default_converter \

	snd1_pcm_rate_get_default_converter

#define snd_pcm_set_hw_ptr \

	snd1_pcm_set_hw_ptr

#define snd_pcm_set_appl_ptr \

	snd1_pcm_set_appl_ptr

#define snd_pcm_link_hw_ptr \

	snd1_pcm_link_hw_ptr

#define snd_pcm_link_appl_ptr \

	snd1_pcm_link_appl_ptr

#define snd_pcm_unlink_hw_ptr \

	snd1_pcm_unlink_hw_ptr

#define snd_pcm_unlink_appl_ptr \

	snd1_pcm_unlink_appl_ptr

#define snd_pcm_mmap_appl_ptr \

	snd1_pcm_mmap_appl_ptr

#define snd_pcm_mmap_appl_backward \

	snd1_pcm_mmap_appl_backward

#define snd_pcm_mmap_appl_forward \

	snd1_pcm_mmap_appl_forward

#define snd_pcm_mmap_hw_backward \

	snd1_pcm_mmap_hw_backward

#define snd_pcm_mmap_hw_forward \

	snd1_pcm_mmap_hw_forward

#define snd_pcm_read_areas \

	snd1_pcm_read_areas

#define snd_pcm_write_areas \

	snd1_pcm_write_areas

#define snd_pcm_read_mmap \

	snd1_pcm_read_mmap

#define snd_pcm_write_mmap \

	snd1_pcm_write_mmap

#define snd_pcm_channel_info_shm \

	snd1_pcm_channel_info_shm

#define snd_pcm_hw_refine_soft \

	snd1_pcm_hw_refine_soft

#define snd_pcm_hw_refine_slave \

	snd1_pcm_hw_refine_slave

#define snd_pcm_hw_params_slave \

	snd1_pcm_hw_params_slave

#define snd_pcm_hw_param_refine_near \

	snd1_pcm_hw_param_refine_near

#define snd_pcm_hw_param_refine_multiple \

	snd1_pcm_hw_param_refine_multiple

#define snd_pcm_hw_param_empty \

	snd1_pcm_hw_param_empty

#define snd_pcm_hw_param_always_eq \

	snd1_pcm_hw_param_always_eq

#define snd_pcm_hw_param_never_eq \

	snd1_pcm_hw_param_never_eq

#define snd_pcm_hw_param_get_mask \

	snd1_pcm_hw_param_get_mask

#define snd_pcm_hw_param_get_interval \

	snd1_pcm_hw_param_get_interval

#define snd_pcm_hw_param_any \

	snd1_pcm_hw_param_any

#define snd_pcm_hw_param_set_integer \

	snd1_pcm_hw_param_set_integer

#define snd_pcm_hw_param_set_first \

	snd1_pcm_hw_param_set_first

#define snd_pcm_hw_param_set_last \

	snd1_pcm_hw_param_set_last

#define snd_pcm_hw_param_set_near \

	snd1_pcm_hw_param_set_near

#define snd_pcm_hw_param_set_min \

	snd1_pcm_hw_param_set_min

#define snd_pcm_hw_param_set_max \

	snd1_pcm_hw_param_set_max

#define snd_pcm_hw_param_set_minmax \

	snd1_pcm_hw_param_set_minmax

#define snd_pcm_hw_param_set \

	snd1_pcm_hw_param_set

#define snd_pcm_hw_param_set_mask \

	snd1_pcm_hw_param_set_mask

#define snd_pcm_hw_param_get \

	snd1_pcm_hw_param_get

#define snd_pcm_hw_param_get_min \

	snd1_pcm_hw_param_get_min

#define snd_pcm_hw_param_get_max \

	snd1_pcm_hw_param_get_max

#define snd_pcm_hw_param_name		\

	snd1_pcm_hw_param_name

int snd_pcm_new(snd_pcm_t **pcmp, snd_pcm_type_t type, const char *name,

		snd_pcm_stream_t stream, int mode);

int snd_pcm_free(snd_pcm_t *pcm);

void snd_pcm_areas_from_buf(snd_pcm_t *pcm, snd_pcm_channel_area_t *areas, void *buf);

void snd_pcm_areas_from_bufs(snd_pcm_t *pcm, snd_pcm_channel_area_t *areas, void **bufs);

int snd_pcm_async(snd_pcm_t *pcm, int sig, pid_t pid);

int snd_pcm_mmap(snd_pcm_t *pcm);

int snd_pcm_munmap(snd_pcm_t *pcm);

int snd_pcm_mmap_ready(snd_pcm_t *pcm);

void snd_pcm_set_hw_ptr(snd_pcm_t *pcm, volatile snd_pcm_uframes_t *hw_ptr, int fd, off_t offset);

void snd_pcm_set_appl_ptr(snd_pcm_t *pcm, volatile snd_pcm_uframes_t *appl_ptr, int fd, off_t offset);

void snd_pcm_link_hw_ptr(snd_pcm_t *pcm, snd_pcm_t *slave);

void snd_pcm_link_appl_ptr(snd_pcm_t *pcm, snd_pcm_t *slave);

void snd_pcm_unlink_hw_ptr(snd_pcm_t *pcm, snd_pcm_t *slave);

void snd_pcm_unlink_appl_ptr(snd_pcm_t *pcm, snd_pcm_t *slave);

snd_pcm_sframes_t snd_pcm_mmap_appl_ptr(snd_pcm_t *pcm, off_t offset);

void snd_pcm_mmap_appl_backward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

void snd_pcm_mmap_appl_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

void snd_pcm_mmap_hw_backward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

void snd_pcm_mmap_hw_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

snd_pcm_sframes_t snd_pcm_mmap_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_mmap_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_mmap_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_mmap_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);

typedef snd_pcm_sframes_t (*snd_pcm_xfer_areas_func_t)(snd_pcm_t *pcm, 

						       const snd_pcm_channel_area_t *areas,

						       snd_pcm_uframes_t offset, 

						       snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_read_areas(snd_pcm_t *pcm, const snd_pcm_channel_area_t *areas,

				     snd_pcm_uframes_t offset, snd_pcm_uframes_t size,

				     snd_pcm_xfer_areas_func_t func);

snd_pcm_sframes_t snd_pcm_write_areas(snd_pcm_t *pcm, const snd_pcm_channel_area_t *areas,

				      snd_pcm_uframes_t offset, snd_pcm_uframes_t size,

				      snd_pcm_xfer_areas_func_t func);

snd_pcm_sframes_t snd_pcm_read_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t offset,

				    snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_write_mmap(snd_pcm_t *pcm, snd_pcm_uframes_t offset,

				     snd_pcm_uframes_t size);

static inline int snd_pcm_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t *info)

{

	if (!pcm->ops->channel_info)

		return -ENOSYS;

	return pcm->ops->channel_info(pcm, info);

}

int snd_pcm_channel_info_shm(snd_pcm_t *pcm, snd_pcm_channel_info_t *info, int shmid);

int _snd_pcm_poll_descriptor(snd_pcm_t *pcm);

#define _snd_pcm_link_descriptor _snd_pcm_poll_descriptor /* FIXME */

#define _snd_pcm_async_descriptor _snd_pcm_poll_descriptor /* FIXME */

/* locked versions */

int __snd_pcm_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas,

			 snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames);

snd_pcm_sframes_t __snd_pcm_mmap_commit(snd_pcm_t *pcm,

					snd_pcm_uframes_t offset,

					snd_pcm_uframes_t frames);

int __snd_pcm_wait_in_lock(snd_pcm_t *pcm, int timeout);

static inline snd_pcm_sframes_t __snd_pcm_avail_update(snd_pcm_t *pcm)

{

	if (!pcm->fast_ops->avail_update)

		return -ENOSYS;

	return pcm->fast_ops->avail_update(pcm->fast_op_arg);

}

static inline int __snd_pcm_start(snd_pcm_t *pcm)

{

	if (!pcm->fast_ops->start)

		return -ENOSYS;

	return pcm->fast_ops->start(pcm->fast_op_arg);

}

static inline snd_pcm_state_t __snd_pcm_state(snd_pcm_t *pcm)

{

	if (!pcm->fast_ops->state)

		return -ENOSYS;

	return pcm->fast_ops->state(pcm->fast_op_arg);

}

static inline int __snd_pcm_hwsync(snd_pcm_t *pcm)

{

	if (!pcm->fast_ops->hwsync)

		return -ENOSYS;

	return pcm->fast_ops->hwsync(pcm->fast_op_arg);

}

static inline int __snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)

{

	if (!pcm->fast_ops->delay)

		return -ENOSYS;

	return pcm->fast_ops->delay(pcm->fast_op_arg, delayp);

}

/* handle special error cases */

static inline int snd_pcm_check_error(snd_pcm_t *pcm, int err)

{

	if (err == -EINTR) {

		switch (__snd_pcm_state(pcm)) {

		case SND_PCM_STATE_XRUN:

			return -EPIPE;

		case SND_PCM_STATE_SUSPENDED:

			return -ESTRPIPE;

		case SND_PCM_STATE_DISCONNECTED:

			return -ENODEV;

		default:

			break;

		}

	}

	return err;

}

static inline snd_pcm_uframes_t __snd_pcm_playback_avail(snd_pcm_t *pcm,

							 const snd_pcm_uframes_t hw_ptr,

							 const snd_pcm_uframes_t appl_ptr)

{

	snd_pcm_sframes_t avail;

	avail = hw_ptr + pcm->buffer_size - appl_ptr;

	if (avail < 0)

		avail += pcm->boundary;

	else if ((snd_pcm_uframes_t) avail >= pcm->boundary)

		avail -= pcm->boundary;

	return avail;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_playback_avail(snd_pcm_t *pcm)

{

	return __snd_pcm_playback_avail(pcm, *pcm->hw.ptr, *pcm->appl.ptr);

}

static inline snd_pcm_uframes_t __snd_pcm_capture_avail(snd_pcm_t *pcm,

							const snd_pcm_uframes_t hw_ptr,

							const snd_pcm_uframes_t appl_ptr)

{

	snd_pcm_sframes_t avail;

	avail = hw_ptr - appl_ptr;

	if (avail < 0)

		avail += pcm->boundary;

	return avail;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_capture_avail(snd_pcm_t *pcm)

{

	return __snd_pcm_capture_avail(pcm, *pcm->hw.ptr, *pcm->appl.ptr);

}

static inline snd_pcm_uframes_t __snd_pcm_avail(snd_pcm_t *pcm,

						const snd_pcm_uframes_t hw_ptr,

						const snd_pcm_uframes_t appl_ptr)

{

	if (pcm->stream == SND_PCM_STREAM_PLAYBACK)

		return __snd_pcm_playback_avail(pcm, hw_ptr, appl_ptr);

	else

		return __snd_pcm_capture_avail(pcm, hw_ptr, appl_ptr);

}

static inline snd_pcm_uframes_t snd_pcm_mmap_avail(snd_pcm_t *pcm)

{

	return __snd_pcm_avail(pcm, *pcm->hw.ptr, *pcm->appl.ptr);

}

static inline snd_pcm_sframes_t snd_pcm_mmap_playback_hw_avail(snd_pcm_t *pcm)

{

	return pcm->buffer_size - snd_pcm_mmap_playback_avail(pcm);

}

static inline snd_pcm_sframes_t snd_pcm_mmap_capture_hw_avail(snd_pcm_t *pcm)

{

	return pcm->buffer_size - snd_pcm_mmap_capture_avail(pcm);

}

static inline snd_pcm_sframes_t snd_pcm_mmap_hw_avail(snd_pcm_t *pcm)

{

	return pcm->buffer_size - snd_pcm_mmap_avail(pcm);

}

static inline snd_pcm_sframes_t snd_pcm_mmap_playback_hw_rewindable(snd_pcm_t *pcm)

{

	snd_pcm_sframes_t ret = snd_pcm_mmap_playback_hw_avail(pcm);

	return (ret >= 0) ? ret : 0;

}

static inline snd_pcm_sframes_t snd_pcm_mmap_capture_hw_rewindable(snd_pcm_t *pcm)

{

	snd_pcm_sframes_t ret = snd_pcm_mmap_capture_hw_avail(pcm);

	return (ret >= 0) ? ret : 0;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_hw_rewindable(snd_pcm_t *pcm)

{

	snd_pcm_sframes_t ret = snd_pcm_mmap_hw_avail(pcm);

	return (ret >= 0) ? ret : 0;

}

static inline const snd_pcm_channel_area_t *snd_pcm_mmap_areas(snd_pcm_t *pcm)

{

	if (pcm->stopped_areas &&

	    __snd_pcm_state(pcm) != SND_PCM_STATE_RUNNING)

		return pcm->stopped_areas;

	return pcm->running_areas;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_offset(snd_pcm_t *pcm)

{

        assert(pcm);

	return *pcm->appl.ptr % pcm->buffer_size;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_hw_offset(snd_pcm_t *pcm)

{

        assert(pcm);

	return *pcm->hw.ptr % pcm->buffer_size;

}

static inline snd_pcm_uframes_t snd_pcm_mmap_playback_delay(snd_pcm_t *pcm)

{

	return snd_pcm_mmap_playback_hw_avail(pcm);

}

static inline snd_pcm_uframes_t snd_pcm_mmap_capture_delay(snd_pcm_t *pcm)

{

	return snd_pcm_mmap_capture_hw_avail(pcm);

}

static inline snd_pcm_sframes_t snd_pcm_mmap_delay(snd_pcm_t *pcm)

{

	if (pcm->stream == SND_PCM_STREAM_PLAYBACK)

		return snd_pcm_mmap_playback_delay(pcm);

	else

		return snd_pcm_mmap_capture_delay(pcm);

}

static inline void *snd_pcm_channel_area_addr(const snd_pcm_channel_area_t *area, snd_pcm_uframes_t offset)

{

	unsigned int bitofs = area->first + area->step * offset;

	assert(bitofs % 8 == 0);

	return (char *) area->addr + bitofs / 8;

}

static inline unsigned int snd_pcm_channel_area_step(const snd_pcm_channel_area_t *area)

{

	assert(area->step % 8 == 0);

	return area->step / 8;

}

static inline snd_pcm_sframes_t _snd_pcm_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)

{

	/* lock handled in the callback */

	if (!pcm->fast_ops->writei)

		return -ENOSYS;

	return pcm->fast_ops->writei(pcm->fast_op_arg, buffer, size);

}

static inline snd_pcm_sframes_t _snd_pcm_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)

{

	/* lock handled in the callback */

	if (!pcm->fast_ops->writen)

		return -ENOSYS;

	return pcm->fast_ops->writen(pcm->fast_op_arg, bufs, size);

}

static inline snd_pcm_sframes_t _snd_pcm_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)

{

	/* lock handled in the callback */

	if (!pcm->fast_ops->readi)

		return -ENOSYS;

	return pcm->fast_ops->readi(pcm->fast_op_arg, buffer, size);

}

static inline snd_pcm_sframes_t _snd_pcm_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)

{

	/* lock handled in the callback */

	if (!pcm->fast_ops->readn)

		return -ENOSYS;

	return pcm->fast_ops->readn(pcm->fast_op_arg, bufs, size);

}

static inline int muldiv(int a, int b, int c, int *r)

{

	int64_t n = (int64_t)a * b;

	int64_t v = n / c;

	if (v > INT_MAX) {

		*r = 0;

		return INT_MAX;

	}

	if (v < INT_MIN) {

		*r = 0;

		return INT_MIN;

	}

	*r = n % c;

	return v;

}

static inline int muldiv_down(int a, int b, int c)

{

	int64_t v = (int64_t)a * b / c;

	if (v > INT_MAX) {

		return INT_MAX;

	}

	if (v < INT_MIN) {

		return INT_MIN;

	}

	return v;

}

static inline int muldiv_near(int a, int b, int c)

{

	int r;

	int n = muldiv(a, b, c, &r);

	if (r >= (c + 1) / 2)

		n++;

	return n;

}

int snd_pcm_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);

int _snd_pcm_hw_params_internal(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);

#undef _snd_pcm_hw_params

int snd_pcm_hw_refine_soft(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);

int snd_pcm_hw_refine_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			    int (*cprepare)(snd_pcm_t *pcm,

					    snd_pcm_hw_params_t *params),

			    int (*cchange)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *params,

					   snd_pcm_hw_params_t *sparams),

			    int (*sprepare)(snd_pcm_t *pcm,

					    snd_pcm_hw_params_t *params),

			    int (*schange)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *params,

					   snd_pcm_hw_params_t *sparams),

			    int (*srefine)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *sparams));

int snd_pcm_hw_params_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			    int (*cchange)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *params,

					   snd_pcm_hw_params_t *sparams),

			    int (*sprepare)(snd_pcm_t *pcm,

					    snd_pcm_hw_params_t *params),

			    int (*schange)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *params,

					   snd_pcm_hw_params_t *sparams),

			    int (*sparams)(snd_pcm_t *pcm,

					   snd_pcm_hw_params_t *sparams));

void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params);

void _snd_pcm_hw_param_set_empty(snd_pcm_hw_params_t *params,

				 snd_pcm_hw_param_t var);

int _snd_pcm_hw_param_set_interval(snd_pcm_hw_params_t *params,

				   snd_pcm_hw_param_t var,

				   const snd_interval_t *val);

int _snd_pcm_hw_param_set_mask(snd_pcm_hw_params_t *params,

			   snd_pcm_hw_param_t var, const snd_mask_t *mask);

int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params,

			    snd_pcm_hw_param_t var);

int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params,

			   snd_pcm_hw_param_t var);

int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,

			  snd_pcm_hw_param_t var, unsigned int val, int dir);

static inline int _snd_pcm_hw_params_set_format(snd_pcm_hw_params_t *params,

						snd_pcm_format_t val)

{

	return _snd_pcm_hw_param_set(params, SND_PCM_HW_PARAM_FORMAT,

				     (unsigned long) val, 0);

}

static inline int _snd_pcm_hw_params_set_subformat(snd_pcm_hw_params_t *params,

				     snd_pcm_subformat_t val)

{

	return _snd_pcm_hw_param_set(params, SND_PCM_HW_PARAM_SUBFORMAT,

				     (unsigned long) val, 0);

}

int _snd_pcm_hw_param_set_min(snd_pcm_hw_params_t *params,

			      snd_pcm_hw_param_t var, unsigned int val, int dir);

int _snd_pcm_hw_param_set_max(snd_pcm_hw_params_t *params,

			      snd_pcm_hw_param_t var, unsigned int val, int dir);

int _snd_pcm_hw_param_set_minmax(snd_pcm_hw_params_t *params,

				 snd_pcm_hw_param_t var,

				 unsigned int min, int mindir,

				 unsigned int max, int maxdir);

int _snd_pcm_hw_param_refine(snd_pcm_hw_params_t *params,

			     snd_pcm_hw_param_t var,

			     const snd_pcm_hw_params_t *src);

int _snd_pcm_hw_params_refine(snd_pcm_hw_params_t *params,

			      unsigned int vars,

			      const snd_pcm_hw_params_t *src);

int snd_pcm_hw_param_refine_near(snd_pcm_t *pcm,

				 snd_pcm_hw_params_t *params,

				 snd_pcm_hw_param_t var,

				 const snd_pcm_hw_params_t *src);

int snd_pcm_hw_param_refine_multiple(snd_pcm_t *pcm,

				     snd_pcm_hw_params_t *params,

				     snd_pcm_hw_param_t var,

				     const snd_pcm_hw_params_t *src);

int snd_pcm_hw_param_empty(const snd_pcm_hw_params_t *params,

			   snd_pcm_hw_param_t var);

int snd_pcm_hw_param_always_eq(const snd_pcm_hw_params_t *params,

			       snd_pcm_hw_param_t var,

			       const snd_pcm_hw_params_t *params1);

int snd_pcm_hw_param_never_eq(const snd_pcm_hw_params_t *params,

			      snd_pcm_hw_param_t var,

			      const snd_pcm_hw_params_t *params1);

const snd_mask_t *snd_pcm_hw_param_get_mask(const snd_pcm_hw_params_t *params,

					      snd_pcm_hw_param_t var);

const snd_interval_t *snd_pcm_hw_param_get_interval(const snd_pcm_hw_params_t *params,

						      snd_pcm_hw_param_t var);

int snd_pcm_hw_param_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			 snd_pcm_hw_param_t var);

int snd_pcm_hw_param_set_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

				 snd_set_mode_t mode,

				 snd_pcm_hw_param_t var);

int snd_pcm_hw_param_set_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			       snd_pcm_hw_param_t var, unsigned int *rval, int *dir);

int snd_pcm_hw_param_set_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			      snd_pcm_hw_param_t var, unsigned int *rval, int *dir);

int snd_pcm_hw_param_set_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			      snd_pcm_hw_param_t var, unsigned int *val, int *dir);

int snd_pcm_hw_param_set_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			     snd_set_mode_t mode,

			     snd_pcm_hw_param_t var,

			     unsigned int *val, int *dir);

int snd_pcm_hw_param_set_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			     snd_set_mode_t mode,

			     snd_pcm_hw_param_t var, unsigned int *val, int *dir);

int snd_pcm_hw_param_set_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

				snd_set_mode_t mode,

				snd_pcm_hw_param_t var,

				unsigned int *min, int *mindir,

				unsigned int *max, int *maxdir);

int snd_pcm_hw_param_set(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			 snd_set_mode_t mode,

			 snd_pcm_hw_param_t var, unsigned int val, int dir);

int snd_pcm_hw_param_set_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			      snd_set_mode_t mode,

			      snd_pcm_hw_param_t var, const snd_mask_t *mask);

int snd_pcm_hw_param_get(const snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var,

			 unsigned int *val, int *dir);

int snd_pcm_hw_param_get_min(const snd_pcm_hw_params_t *params,

			     snd_pcm_hw_param_t var,

			     unsigned int *val, int *dir);

int snd_pcm_hw_param_get_max(const snd_pcm_hw_params_t *params,

			     snd_pcm_hw_param_t var,

			     unsigned int *val, int *dir);

#ifdef INTERNAL

snd_pcm_sframes_t INTERNAL(snd_pcm_forward)(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

int INTERNAL(snd_pcm_hw_params_get_access)(const snd_pcm_hw_params_t *params, snd_pcm_access_t *access);

int snd_pcm_hw_params_test_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t access);

int snd_pcm_hw_params_set_access(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t access);

int INTERNAL(snd_pcm_hw_params_set_access_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *access);

int INTERNAL(snd_pcm_hw_params_set_access_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *access);

int snd_pcm_hw_params_set_access_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask);

int snd_pcm_hw_params_get_access_mask(snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask);

int INTERNAL(snd_pcm_hw_params_get_format)(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val);

int snd_pcm_hw_params_test_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val);

int snd_pcm_hw_params_set_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val);

int INTERNAL(snd_pcm_hw_params_set_format_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format);

int INTERNAL(snd_pcm_hw_params_set_format_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format);

int snd_pcm_hw_params_set_format_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask);

void snd_pcm_hw_params_get_format_mask(snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask);

int INTERNAL(snd_pcm_hw_params_get_subformat)(const snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);

int snd_pcm_hw_params_test_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat);

int snd_pcm_hw_params_set_subformat(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat);

int INTERNAL(snd_pcm_hw_params_set_subformat_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);

int INTERNAL(snd_pcm_hw_params_set_subformat_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat);

int snd_pcm_hw_params_set_subformat_mask(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask);

void snd_pcm_hw_params_get_subformat_mask(snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask);

int INTERNAL(snd_pcm_hw_params_get_channels)(const snd_pcm_hw_params_t *params, unsigned int *val);

int INTERNAL(snd_pcm_hw_params_get_channels_min)(const snd_pcm_hw_params_t *params, unsigned int *val);

int INTERNAL(snd_pcm_hw_params_get_channels_max)(const snd_pcm_hw_params_t *params, unsigned int *val);

int snd_pcm_hw_params_test_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);

int snd_pcm_hw_params_set_channels(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val);

int snd_pcm_hw_params_set_channels_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);

int snd_pcm_hw_params_set_channels_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);

int snd_pcm_hw_params_set_channels_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max);

int INTERNAL(snd_pcm_hw_params_set_channels_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);

int INTERNAL(snd_pcm_hw_params_set_channels_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);

int INTERNAL(snd_pcm_hw_params_set_channels_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val);

int INTERNAL(snd_pcm_hw_params_get_rate)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_rate_min)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_rate_max)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_test_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);

int snd_pcm_hw_params_set_rate(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);

int snd_pcm_hw_params_set_rate_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_set_rate_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_set_rate_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);

int INTERNAL(snd_pcm_hw_params_set_rate_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_set_rate_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_set_rate_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_period_time)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_period_time_min)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_period_time_max)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_test_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);

int snd_pcm_hw_params_set_period_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);

int snd_pcm_hw_params_set_period_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_set_period_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int snd_pcm_hw_params_set_period_time_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir);

int INTERNAL(snd_pcm_hw_params_set_period_time_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_set_period_time_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_set_period_time_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);

int INTERNAL(snd_pcm_hw_params_get_period_size)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);

int INTERNAL(snd_pcm_hw_params_get_period_size_min)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);