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pcm_local.h
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pcm_local.h
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/*
* 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_generic(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas,
snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames);
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 SND_PCM_STATE_OPEN;
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;
}
/**
* \retval number of frames available to the application for playback
*
* This is how far ahead the hardware position in the ring buffer is,
* compared to the application position. ie. for playback it's the
* number of frames in the empty part of the ring buffer.
*/
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);
}
/*
* \retval number of frames available to the application for capture
*
* This is how far ahead the hardware position in the ring buffer is
* compared to the application position. ie. for capture, it's the
* number of frames in the filled part of the ring buffer.
*/
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);
}
/*
* \retval number of frames available to the hardware for playback
*
* ie. the filled part of the ring buffer
*/
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);
}
/*
* \retval number of frames available to the hardware for capture
*
* ie. the empty part of the ring buffer.
*/
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;
}
/*
* \retval number of frames pending from application to hardware
*/
static inline snd_pcm_uframes_t snd_pcm_mmap_playback_delay(snd_pcm_t *pcm)
{
return snd_pcm_mmap_playback_hw_avail(pcm);
}
/*
* \retval number of frames pending from hardware to application
*/
static inline snd_pcm_uframes_t snd_pcm_mmap_capture_delay(snd_pcm_t *pcm)
{
return snd_pcm_mmap_capture_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);
int INTERNAL(snd_pcm_hw_params_get_period_size_max)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir);
int snd_pcm_hw_params_test_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir);
int snd_pcm_hw_params_set_period_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir);
int snd_pcm_hw_params_set_period_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
int snd_pcm_hw_params_set_period_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
int snd_pcm_hw_params_set_period_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, int *mindir, snd_pcm_uframes_t *max, int *maxdir);
int INTERNAL(snd_pcm_hw_params_set_period_size_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_period_size_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_period_size_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir);
int snd_pcm_hw_params_set_period_size_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
int INTERNAL(snd_pcm_hw_params_get_periods)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_get_periods_min)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_get_periods_max)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_test_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
int snd_pcm_hw_params_set_periods(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
int snd_pcm_hw_params_set_periods_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_set_periods_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_set_periods_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_periods_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_periods_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_periods_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_set_periods_integer(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
int INTERNAL(snd_pcm_hw_params_get_buffer_time)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_get_buffer_time_min)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_get_buffer_time_max)(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_test_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
int snd_pcm_hw_params_set_buffer_time(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir);
int snd_pcm_hw_params_set_buffer_time_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_set_buffer_time_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int snd_pcm_hw_params_set_buffer_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_buffer_time_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_buffer_time_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_set_buffer_time_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir);
int INTERNAL(snd_pcm_hw_params_get_buffer_size)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int INTERNAL(snd_pcm_hw_params_get_buffer_size_min)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int INTERNAL(snd_pcm_hw_params_get_buffer_size_max)(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_hw_params_test_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
int snd_pcm_hw_params_set_buffer_size(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val);
int snd_pcm_hw_params_set_buffer_size_min(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_hw_params_set_buffer_size_max(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_hw_params_set_buffer_size_minmax(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, snd_pcm_uframes_t *max);
int INTERNAL(snd_pcm_hw_params_set_buffer_size_near)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int INTERNAL(snd_pcm_hw_params_set_buffer_size_first)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int INTERNAL(snd_pcm_hw_params_set_buffer_size_last)(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_sw_params_set_tstamp_mode(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_t val);
int INTERNAL(snd_pcm_sw_params_get_tstamp_mode)(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_t *val);
int snd_pcm_sw_params_set_tstamp_type(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t val);
int snd_pcm_sw_params_get_tstamp_type(const snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t *val);
int snd_pcm_sw_params_set_avail_min(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
int INTERNAL(snd_pcm_sw_params_get_avail_min)(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_sw_params_set_start_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
int INTERNAL(snd_pcm_sw_params_get_start_threshold)(const snd_pcm_sw_params_t *paramsm, snd_pcm_uframes_t *val);
int snd_pcm_sw_params_set_stop_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
int INTERNAL(snd_pcm_sw_params_get_stop_threshold)(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_sw_params_set_silence_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
int INTERNAL(snd_pcm_sw_params_get_silence_threshold)(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
int snd_pcm_sw_params_set_silence_size(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val);
int INTERNAL(snd_pcm_sw_params_get_silence_size)(const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val);
#endif /* INTERNAL */
const char *snd_pcm_hw_param_name(snd_pcm_hw_param_t param);
void snd_pcm_hw_param_dump(const snd_pcm_hw_params_t *params,
snd_pcm_hw_param_t var, snd_output_t *out);
#if 0
int snd_pcm_hw_strategy_simple_near(snd_pcm_hw_strategy_t *strategy, int order,
snd_pcm_hw_param_t var,
unsigned int best,
unsigned int mul);
int snd_pcm_hw_strategy_simple_choices(snd_pcm_hw_strategy_t *strategy, int order,
snd_pcm_hw_param_t var,
unsigned int count,
snd_pcm_hw_strategy_simple_choices_list_t *choices);
#endif
#define SCONF_MANDATORY 1
#define SCONF_UNCHANGED 2
int snd_pcm_slave_conf(snd_config_t *root, snd_config_t *conf,
snd_config_t **pcm_conf, unsigned int count, ...);
#define SND_PCM_APPEND (1<<8)
int snd_pcm_open_named_slave(snd_pcm_t **pcmp, const char *name,
snd_config_t *root,