/**

 * \file include/pcm.h

 * \brief Application interface library for the ALSA driver

 * \author Jaroslav Kysela <perex@perex.cz>

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

 * \author Takashi Iwai <tiwai@suse.de>

 * \date 1998-2001

 *

 * Application interface library for the ALSA driver.

 * See the \ref pcm page for more details.

 */

/*

 *   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

 *

 */

#ifndef __ALSA_PCM_H

#define __ALSA_PCM_H

#ifdef __cplusplus

extern "C" {

#endif

#include <stdint.h>

/**

 *  \defgroup PCM PCM Interface

 *  See the \ref pcm page for more details.

 *  \{

 */

/** dlsym version for interface entry callback */

#define SND_PCM_DLSYM_VERSION		_dlsym_pcm_001

/** PCM generic info container */

typedef struct _snd_pcm_info snd_pcm_info_t;

/** PCM hardware configuration space container

 *

 *  snd_pcm_hw_params_t is an opaque structure which contains a set of possible

 *  PCM hardware configurations. For example, a given instance might include a

 *  range of buffer sizes, a range of period sizes, and a set of several sample

 *  formats. Some subset of all possible combinations these sets may be valid,

 *  but not necessarily any combination will be valid.

 *

 *  When a parameter is set or restricted using a snd_pcm_hw_params_set*

 *  function, all of the other ranges will be updated to exclude as many

 *  impossible configurations as possible. Attempting to set a parameter

 *  outside of its acceptable range will result in the function failing

 *  and an error code being returned.

 */

typedef struct _snd_pcm_hw_params snd_pcm_hw_params_t;

/** PCM software configuration container */

typedef struct _snd_pcm_sw_params snd_pcm_sw_params_t;

/** PCM status container */

 typedef struct _snd_pcm_status snd_pcm_status_t;

/** PCM access types mask */

typedef struct _snd_pcm_access_mask snd_pcm_access_mask_t;

/** PCM formats mask */

typedef struct _snd_pcm_format_mask snd_pcm_format_mask_t;

/** PCM subformats mask */

typedef struct _snd_pcm_subformat_mask snd_pcm_subformat_mask_t;

/** PCM class */

typedef enum _snd_pcm_class {

	/** standard device */

	SND_PCM_CLASS_GENERIC = 0,

	/** multichannel device */

	SND_PCM_CLASS_MULTI,

	/** software modem device */

	SND_PCM_CLASS_MODEM,

	/** digitizer device */

	SND_PCM_CLASS_DIGITIZER,

	SND_PCM_CLASS_LAST = SND_PCM_CLASS_DIGITIZER

} snd_pcm_class_t;

/** PCM subclass */

typedef enum _snd_pcm_subclass {

	/** subdevices are mixed together */

	SND_PCM_SUBCLASS_GENERIC_MIX = 0,

	/** multichannel subdevices are mixed together */

	SND_PCM_SUBCLASS_MULTI_MIX,

	SND_PCM_SUBCLASS_LAST = SND_PCM_SUBCLASS_MULTI_MIX

} snd_pcm_subclass_t;

/** PCM stream (direction) */

typedef enum _snd_pcm_stream {

	/** Playback stream */

	SND_PCM_STREAM_PLAYBACK = 0,

	/** Capture stream */

	SND_PCM_STREAM_CAPTURE,

	SND_PCM_STREAM_LAST = SND_PCM_STREAM_CAPTURE

} snd_pcm_stream_t;

/** PCM access type */

typedef enum _snd_pcm_access {

	/** mmap access with simple interleaved channels */

	SND_PCM_ACCESS_MMAP_INTERLEAVED = 0,

	/** mmap access with simple non interleaved channels */

	SND_PCM_ACCESS_MMAP_NONINTERLEAVED,

	/** mmap access with complex placement */

	SND_PCM_ACCESS_MMAP_COMPLEX,

	/** snd_pcm_readi/snd_pcm_writei access */

	SND_PCM_ACCESS_RW_INTERLEAVED,

	/** snd_pcm_readn/snd_pcm_writen access */

	SND_PCM_ACCESS_RW_NONINTERLEAVED,

	SND_PCM_ACCESS_LAST = SND_PCM_ACCESS_RW_NONINTERLEAVED

} snd_pcm_access_t;

/** PCM sample format */

typedef enum _snd_pcm_format {

	/** Unknown */

	SND_PCM_FORMAT_UNKNOWN = -1,

	/** Signed 8 bit */

	SND_PCM_FORMAT_S8 = 0,

	/** Unsigned 8 bit */

	SND_PCM_FORMAT_U8,

	/** Signed 16 bit Little Endian */

	SND_PCM_FORMAT_S16_LE,

	/** Signed 16 bit Big Endian */

	SND_PCM_FORMAT_S16_BE,

	/** Unsigned 16 bit Little Endian */

	SND_PCM_FORMAT_U16_LE,

	/** Unsigned 16 bit Big Endian */

	SND_PCM_FORMAT_U16_BE,

	/** Signed 24 bit Little Endian using low three bytes in 32-bit word */

	SND_PCM_FORMAT_S24_LE,

	/** Signed 24 bit Big Endian using low three bytes in 32-bit word */

	SND_PCM_FORMAT_S24_BE,

	/** Unsigned 24 bit Little Endian using low three bytes in 32-bit word */

	SND_PCM_FORMAT_U24_LE,

	/** Unsigned 24 bit Big Endian using low three bytes in 32-bit word */

	SND_PCM_FORMAT_U24_BE,

	/** Signed 32 bit Little Endian */

	SND_PCM_FORMAT_S32_LE,

	/** Signed 32 bit Big Endian */

	SND_PCM_FORMAT_S32_BE,

	/** Unsigned 32 bit Little Endian */

	SND_PCM_FORMAT_U32_LE,

	/** Unsigned 32 bit Big Endian */

	SND_PCM_FORMAT_U32_BE,

	/** Float 32 bit Little Endian, Range -1.0 to 1.0 */

	SND_PCM_FORMAT_FLOAT_LE,

	/** Float 32 bit Big Endian, Range -1.0 to 1.0 */

	SND_PCM_FORMAT_FLOAT_BE,

	/** Float 64 bit Little Endian, Range -1.0 to 1.0 */

	SND_PCM_FORMAT_FLOAT64_LE,

	/** Float 64 bit Big Endian, Range -1.0 to 1.0 */

	SND_PCM_FORMAT_FLOAT64_BE,

	/** IEC-958 Little Endian */

	SND_PCM_FORMAT_IEC958_SUBFRAME_LE,

	/** IEC-958 Big Endian */

	SND_PCM_FORMAT_IEC958_SUBFRAME_BE,

	/** Mu-Law */

	SND_PCM_FORMAT_MU_LAW,

	/** A-Law */

	SND_PCM_FORMAT_A_LAW,

	/** Ima-ADPCM */

	SND_PCM_FORMAT_IMA_ADPCM,

	/** MPEG */

	SND_PCM_FORMAT_MPEG,

	/** GSM */

	SND_PCM_FORMAT_GSM,

	/** Signed 20bit Little Endian in 4bytes format, LSB justified */

	SND_PCM_FORMAT_S20_LE,

	/** Signed 20bit Big Endian in 4bytes format, LSB justified */

	SND_PCM_FORMAT_S20_BE,

	/** Unsigned 20bit Little Endian in 4bytes format, LSB justified */

	SND_PCM_FORMAT_U20_LE,

	/** Unsigned 20bit Big Endian in 4bytes format, LSB justified */

	SND_PCM_FORMAT_U20_BE,

	/** Special */

	SND_PCM_FORMAT_SPECIAL = 31,

	/** Signed 24bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_S24_3LE = 32,

	/** Signed 24bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_S24_3BE,

	/** Unsigned 24bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_U24_3LE,

	/** Unsigned 24bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_U24_3BE,

	/** Signed 20bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_S20_3LE,

	/** Signed 20bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_S20_3BE,

	/** Unsigned 20bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_U20_3LE,

	/** Unsigned 20bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_U20_3BE,

	/** Signed 18bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_S18_3LE,

	/** Signed 18bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_S18_3BE,

	/** Unsigned 18bit Little Endian in 3bytes format */

	SND_PCM_FORMAT_U18_3LE,

	/** Unsigned 18bit Big Endian in 3bytes format */

	SND_PCM_FORMAT_U18_3BE,

	/* G.723 (ADPCM) 24 kbit/s, 8 samples in 3 bytes */

	SND_PCM_FORMAT_G723_24,

	/* G.723 (ADPCM) 24 kbit/s, 1 sample in 1 byte */

	SND_PCM_FORMAT_G723_24_1B,

	/* G.723 (ADPCM) 40 kbit/s, 8 samples in 3 bytes */

	SND_PCM_FORMAT_G723_40,

	/* G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte */

	SND_PCM_FORMAT_G723_40_1B,

	/* Direct Stream Digital (DSD) in 1-byte samples (x8) */

	SND_PCM_FORMAT_DSD_U8,

	/* Direct Stream Digital (DSD) in 2-byte samples (x16) */

	SND_PCM_FORMAT_DSD_U16_LE,

	/* Direct Stream Digital (DSD) in 4-byte samples (x32) */

	SND_PCM_FORMAT_DSD_U32_LE,

	/* Direct Stream Digital (DSD) in 2-byte samples (x16) */

	SND_PCM_FORMAT_DSD_U16_BE,

	/* Direct Stream Digital (DSD) in 4-byte samples (x32) */

	SND_PCM_FORMAT_DSD_U32_BE,

	SND_PCM_FORMAT_LAST = SND_PCM_FORMAT_DSD_U32_BE,

#if __BYTE_ORDER == __LITTLE_ENDIAN

	/** Signed 16 bit CPU endian */

	SND_PCM_FORMAT_S16 = SND_PCM_FORMAT_S16_LE,

	/** Unsigned 16 bit CPU endian */

	SND_PCM_FORMAT_U16 = SND_PCM_FORMAT_U16_LE,

	/** Signed 24 bit CPU endian */

	SND_PCM_FORMAT_S24 = SND_PCM_FORMAT_S24_LE,

	/** Unsigned 24 bit CPU endian */

	SND_PCM_FORMAT_U24 = SND_PCM_FORMAT_U24_LE,

	/** Signed 32 bit CPU endian */

	SND_PCM_FORMAT_S32 = SND_PCM_FORMAT_S32_LE,

	/** Unsigned 32 bit CPU endian */

	SND_PCM_FORMAT_U32 = SND_PCM_FORMAT_U32_LE,

	/** Float 32 bit CPU endian */

	SND_PCM_FORMAT_FLOAT = SND_PCM_FORMAT_FLOAT_LE,

	/** Float 64 bit CPU endian */

	SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_LE,

	/** IEC-958 CPU Endian */

	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_LE,

	/** Signed 20bit in 4bytes format, LSB justified, CPU Endian */

	SND_PCM_FORMAT_S20 = SND_PCM_FORMAT_S20_LE,

	/** Unsigned 20bit in 4bytes format, LSB justified, CPU Endian */

	SND_PCM_FORMAT_U20 = SND_PCM_FORMAT_U20_LE,

#elif __BYTE_ORDER == __BIG_ENDIAN

	/** Signed 16 bit CPU endian */

	SND_PCM_FORMAT_S16 = SND_PCM_FORMAT_S16_BE,

	/** Unsigned 16 bit CPU endian */

	SND_PCM_FORMAT_U16 = SND_PCM_FORMAT_U16_BE,

	/** Signed 24 bit CPU endian */

	SND_PCM_FORMAT_S24 = SND_PCM_FORMAT_S24_BE,

	/** Unsigned 24 bit CPU endian */

	SND_PCM_FORMAT_U24 = SND_PCM_FORMAT_U24_BE,

	/** Signed 32 bit CPU endian */

	SND_PCM_FORMAT_S32 = SND_PCM_FORMAT_S32_BE,

	/** Unsigned 32 bit CPU endian */

	SND_PCM_FORMAT_U32 = SND_PCM_FORMAT_U32_BE,

	/** Float 32 bit CPU endian */

	SND_PCM_FORMAT_FLOAT = SND_PCM_FORMAT_FLOAT_BE,

	/** Float 64 bit CPU endian */

	SND_PCM_FORMAT_FLOAT64 = SND_PCM_FORMAT_FLOAT64_BE,

	/** IEC-958 CPU Endian */

	SND_PCM_FORMAT_IEC958_SUBFRAME = SND_PCM_FORMAT_IEC958_SUBFRAME_BE,

	/** Signed 20bit in 4bytes format, LSB justified, CPU Endian */

	SND_PCM_FORMAT_S20 = SND_PCM_FORMAT_S20_BE,

	/** Unsigned 20bit in 4bytes format, LSB justified, CPU Endian */

	SND_PCM_FORMAT_U20 = SND_PCM_FORMAT_U20_BE,

#else

#error "Unknown endian"

#endif

} snd_pcm_format_t;

/** PCM sample subformat */

typedef enum _snd_pcm_subformat {

	/** Standard */

	SND_PCM_SUBFORMAT_STD = 0,

	SND_PCM_SUBFORMAT_LAST = SND_PCM_SUBFORMAT_STD

} snd_pcm_subformat_t;

/** PCM state */

typedef enum _snd_pcm_state {

	/** Open */

	SND_PCM_STATE_OPEN = 0,

	/** Setup installed */ 

	SND_PCM_STATE_SETUP,

	/** Ready to start */

	SND_PCM_STATE_PREPARED,

	/** Running */

	SND_PCM_STATE_RUNNING,

	/** Stopped: underrun (playback) or overrun (capture) detected */

	SND_PCM_STATE_XRUN,

	/** Draining: running (playback) or stopped (capture) */

	SND_PCM_STATE_DRAINING,

	/** Paused */

	SND_PCM_STATE_PAUSED,

	/** Hardware is suspended */

	SND_PCM_STATE_SUSPENDED,

	/** Hardware is disconnected */

	SND_PCM_STATE_DISCONNECTED,

	SND_PCM_STATE_LAST = SND_PCM_STATE_DISCONNECTED,

	/** Private - used internally in the library - do not use*/

	SND_PCM_STATE_PRIVATE1 = 1024

} snd_pcm_state_t;

/** PCM start mode */

typedef enum _snd_pcm_start {

	/** Automatic start on data read/write */

	SND_PCM_START_DATA = 0,

	/** Explicit start */

	SND_PCM_START_EXPLICIT,

	SND_PCM_START_LAST = SND_PCM_START_EXPLICIT

} snd_pcm_start_t;

/** PCM xrun mode */

typedef enum _snd_pcm_xrun {

	/** Xrun detection disabled */

	SND_PCM_XRUN_NONE = 0,

	/** Stop on xrun detection */

	SND_PCM_XRUN_STOP,

	SND_PCM_XRUN_LAST = SND_PCM_XRUN_STOP

} snd_pcm_xrun_t;

/** PCM timestamp mode */

typedef enum _snd_pcm_tstamp {

	/** No timestamp */

	SND_PCM_TSTAMP_NONE = 0,

	/** Update timestamp at every hardware position update */

	SND_PCM_TSTAMP_ENABLE,

	/** Equivalent with #SND_PCM_TSTAMP_ENABLE,

	 * just for compatibility with older versions

	 */

	SND_PCM_TSTAMP_MMAP = SND_PCM_TSTAMP_ENABLE,

	SND_PCM_TSTAMP_LAST = SND_PCM_TSTAMP_ENABLE

} snd_pcm_tstamp_t;

typedef enum _snd_pcm_tstamp_type {

	SND_PCM_TSTAMP_TYPE_GETTIMEOFDAY = 0,	/**< gettimeofday equivalent */

	SND_PCM_TSTAMP_TYPE_MONOTONIC,	/**< posix_clock_monotonic equivalent */

	SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW,	/**< monotonic_raw (no NTP) */

	SND_PCM_TSTAMP_TYPE_LAST = SND_PCM_TSTAMP_TYPE_MONOTONIC_RAW,

} snd_pcm_tstamp_type_t;

typedef struct _snd_pcm_audio_tstamp_config {

	/* 5 of max 16 bits used */

	unsigned int type_requested:4;

	unsigned int report_delay:1; /* add total delay to A/D or D/A */

} snd_pcm_audio_tstamp_config_t;

typedef struct _snd_pcm_audio_tstamp_report {

	/* 6 of max 16 bits used for bit-fields */

	/* for backwards compatibility */

	unsigned int valid:1;

	/* actual type if hardware could not support requested timestamp */

	unsigned int actual_type:4;

	/* accuracy represented in ns units */

	unsigned int accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */

	unsigned int accuracy; /* up to 4.29s, will be packed in separate field  */

} snd_pcm_audio_tstamp_report_t;

/** Unsigned frames quantity */

typedef unsigned long snd_pcm_uframes_t;

/** Signed frames quantity */

typedef long snd_pcm_sframes_t;

/** Non blocking mode (flag for open mode) \hideinitializer */

#define SND_PCM_NONBLOCK		0x00000001

/** Async notification (flag for open mode) \hideinitializer */

#define SND_PCM_ASYNC			0x00000002

/** In an abort state (internal, not allowed for open) */

#define SND_PCM_ABORT			0x00008000

/** Disable automatic (but not forced!) rate resamplinig */

#define SND_PCM_NO_AUTO_RESAMPLE	0x00010000

/** Disable automatic (but not forced!) channel conversion */

#define SND_PCM_NO_AUTO_CHANNELS	0x00020000

/** Disable automatic (but not forced!) format conversion */

#define SND_PCM_NO_AUTO_FORMAT		0x00040000

/** Disable soft volume control */

#define SND_PCM_NO_SOFTVOL		0x00080000

/** PCM handle */

typedef struct _snd_pcm snd_pcm_t;

/** PCM type */

enum _snd_pcm_type {

	/** Kernel level PCM */

	SND_PCM_TYPE_HW = 0,

	/** Hooked PCM */

	SND_PCM_TYPE_HOOKS,

	/** One or more linked PCM with exclusive access to selected

	    channels */

	SND_PCM_TYPE_MULTI,

	/** File writing plugin */

	SND_PCM_TYPE_FILE,

	/** Null endpoint PCM */

	SND_PCM_TYPE_NULL,

	/** Shared memory client PCM */

	SND_PCM_TYPE_SHM,

	/** INET client PCM (not yet implemented) */

	SND_PCM_TYPE_INET,

	/** Copying plugin */

	SND_PCM_TYPE_COPY,

	/** Linear format conversion PCM */

	SND_PCM_TYPE_LINEAR,

	/** A-Law format conversion PCM */

	SND_PCM_TYPE_ALAW,

	/** Mu-Law format conversion PCM */

	SND_PCM_TYPE_MULAW,

	/** IMA-ADPCM format conversion PCM */

	SND_PCM_TYPE_ADPCM,

	/** Rate conversion PCM */

	SND_PCM_TYPE_RATE,

	/** Attenuated static route PCM */

	SND_PCM_TYPE_ROUTE,

	/** Format adjusted PCM */

	SND_PCM_TYPE_PLUG,

	/** Sharing PCM */

	SND_PCM_TYPE_SHARE,

	/** Meter plugin */

	SND_PCM_TYPE_METER,

	/** Mixing PCM */

	SND_PCM_TYPE_MIX,

	/** Attenuated dynamic route PCM (not yet implemented) */

	SND_PCM_TYPE_DROUTE,

	/** Loopback server plugin (not yet implemented) */

	SND_PCM_TYPE_LBSERVER,

	/** Linear Integer <-> Linear Float format conversion PCM */

	SND_PCM_TYPE_LINEAR_FLOAT,

	/** LADSPA integration plugin */

	SND_PCM_TYPE_LADSPA,

	/** Direct Mixing plugin */

	SND_PCM_TYPE_DMIX,

	/** Jack Audio Connection Kit plugin */

	SND_PCM_TYPE_JACK,

	/** Direct Snooping plugin */

	SND_PCM_TYPE_DSNOOP,

	/** Direct Sharing plugin */

	SND_PCM_TYPE_DSHARE,

	/** IEC958 subframe plugin */

	SND_PCM_TYPE_IEC958,

	/** Soft volume plugin */

	SND_PCM_TYPE_SOFTVOL,

	/** External I/O plugin */

	SND_PCM_TYPE_IOPLUG,

	/** External filter plugin */

	SND_PCM_TYPE_EXTPLUG,

	/** Mmap-emulation plugin */

	SND_PCM_TYPE_MMAP_EMUL,

	SND_PCM_TYPE_LAST = SND_PCM_TYPE_MMAP_EMUL

};

/** PCM type */

typedef enum _snd_pcm_type snd_pcm_type_t;

/** PCM area specification */

typedef struct _snd_pcm_channel_area {

	/** base address of channel samples */

	void *addr;

	/** offset to first sample in bits */

	unsigned int first;

	/** samples distance in bits */

	unsigned int step;

} snd_pcm_channel_area_t;

/** PCM synchronization ID */

typedef union _snd_pcm_sync_id {

	/** 8-bit ID */

	unsigned char id[16];

	/** 16-bit ID */

	unsigned short id16[8];

	/** 32-bit ID */

	unsigned int id32[4];

} snd_pcm_sync_id_t;

/** #SND_PCM_TYPE_METER scope handle */

typedef struct _snd_pcm_scope snd_pcm_scope_t;

int snd_pcm_open(snd_pcm_t **pcm, const char *name, 

		 snd_pcm_stream_t stream, int mode);

int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name, 

		       snd_pcm_stream_t stream, int mode,

		       snd_config_t *lconf);

int snd_pcm_open_fallback(snd_pcm_t **pcm, snd_config_t *root,

			  const char *name, const char *orig_name,

			  snd_pcm_stream_t stream, int mode);

int snd_pcm_close(snd_pcm_t *pcm);

const char *snd_pcm_name(snd_pcm_t *pcm);

snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm);

snd_pcm_stream_t snd_pcm_stream(snd_pcm_t *pcm);

int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm);

int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);

int snd_pcm_poll_descriptors_revents(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);

int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);

static __inline__ int snd_pcm_abort(snd_pcm_t *pcm) { return snd_pcm_nonblock(pcm, 2); }

int snd_async_add_pcm_handler(snd_async_handler_t **handler, snd_pcm_t *pcm, 

			      snd_async_callback_t callback, void *private_data);

snd_pcm_t *snd_async_handler_get_pcm(snd_async_handler_t *handler);

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

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

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

int snd_pcm_hw_free(snd_pcm_t *pcm);

int snd_pcm_sw_params_current(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);

int snd_pcm_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);

int snd_pcm_prepare(snd_pcm_t *pcm);

int snd_pcm_reset(snd_pcm_t *pcm);

int snd_pcm_status(snd_pcm_t *pcm, snd_pcm_status_t *status);

int snd_pcm_start(snd_pcm_t *pcm);

int snd_pcm_drop(snd_pcm_t *pcm);

int snd_pcm_drain(snd_pcm_t *pcm);

int snd_pcm_pause(snd_pcm_t *pcm, int enable);

snd_pcm_state_t snd_pcm_state(snd_pcm_t *pcm);

int snd_pcm_hwsync(snd_pcm_t *pcm);

int snd_pcm_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);

int snd_pcm_resume(snd_pcm_t *pcm);

int snd_pcm_htimestamp(snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp);

snd_pcm_sframes_t snd_pcm_avail(snd_pcm_t *pcm);

snd_pcm_sframes_t snd_pcm_avail_update(snd_pcm_t *pcm);

int snd_pcm_avail_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *availp, snd_pcm_sframes_t *delayp);

snd_pcm_sframes_t snd_pcm_rewindable(snd_pcm_t *pcm);

snd_pcm_sframes_t snd_pcm_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

snd_pcm_sframes_t snd_pcm_forwardable(snd_pcm_t *pcm);

snd_pcm_sframes_t snd_pcm_forward(snd_pcm_t *pcm, snd_pcm_uframes_t frames);

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

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

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

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

int snd_pcm_wait(snd_pcm_t *pcm, int timeout);

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

int snd_pcm_unlink(snd_pcm_t *pcm);

/** channel mapping API version number */

#define SND_CHMAP_API_VERSION	((1 << 16) | (0 << 8) | 1)

/** channel map list type */

enum snd_pcm_chmap_type {

	SND_CHMAP_TYPE_NONE = 0,/**< unspecified channel position */

	SND_CHMAP_TYPE_FIXED,	/**< fixed channel position */

	SND_CHMAP_TYPE_VAR,	/**< freely swappable channel position */

	SND_CHMAP_TYPE_PAIRED,	/**< pair-wise swappable channel position */

	SND_CHMAP_TYPE_LAST = SND_CHMAP_TYPE_PAIRED, /**< last entry */

};

/** channel positions */

enum snd_pcm_chmap_position {

	SND_CHMAP_UNKNOWN = 0,	/**< unspecified */

	SND_CHMAP_NA,		/**< N/A, silent */

	SND_CHMAP_MONO,		/**< mono stream */

	SND_CHMAP_FL,		/**< front left */

	SND_CHMAP_FR,		/**< front right */

	SND_CHMAP_RL,		/**< rear left */

	SND_CHMAP_RR,		/**< rear right */

	SND_CHMAP_FC,		/**< front center */

	SND_CHMAP_LFE,		/**< LFE */

	SND_CHMAP_SL,		/**< side left */

	SND_CHMAP_SR,		/**< side right */

	SND_CHMAP_RC,		/**< rear center */

	SND_CHMAP_FLC,		/**< front left center */

	SND_CHMAP_FRC,		/**< front right center */

	SND_CHMAP_RLC,		/**< rear left center */

	SND_CHMAP_RRC,		/**< rear right center */

	SND_CHMAP_FLW,		/**< front left wide */

	SND_CHMAP_FRW,		/**< front right wide */

	SND_CHMAP_FLH,		/**< front left high */

	SND_CHMAP_FCH,		/**< front center high */

	SND_CHMAP_FRH,		/**< front right high */

	SND_CHMAP_TC,		/**< top center */

	SND_CHMAP_TFL,		/**< top front left */

	SND_CHMAP_TFR,		/**< top front right */

	SND_CHMAP_TFC,		/**< top front center */

	SND_CHMAP_TRL,		/**< top rear left */

	SND_CHMAP_TRR,		/**< top rear right */

	SND_CHMAP_TRC,		/**< top rear center */

	SND_CHMAP_TFLC,		/**< top front left center */

	SND_CHMAP_TFRC,		/**< top front right center */

	SND_CHMAP_TSL,		/**< top side left */

	SND_CHMAP_TSR,		/**< top side right */

	SND_CHMAP_LLFE,		/**< left LFE */

	SND_CHMAP_RLFE,		/**< right LFE */

	SND_CHMAP_BC,		/**< bottom center */

	SND_CHMAP_BLC,		/**< bottom left center */

	SND_CHMAP_BRC,		/**< bottom right center */

	SND_CHMAP_LAST = SND_CHMAP_BRC,

};

/** bitmask for channel position */

#define SND_CHMAP_POSITION_MASK		0xffff

/** bit flag indicating the channel is phase inverted */

#define SND_CHMAP_PHASE_INVERSE		(0x01 << 16)

/** bit flag indicating the non-standard channel value */

#define SND_CHMAP_DRIVER_SPEC		(0x02 << 16)

/** the channel map header */

typedef struct snd_pcm_chmap {

	unsigned int channels;	/**< number of channels */

	unsigned int pos[0];	/**< channel position array */

} snd_pcm_chmap_t;

/** the header of array items returned from snd_pcm_query_chmaps() */

typedef struct snd_pcm_chmap_query {

	enum snd_pcm_chmap_type type;	/**< channel map type */

	snd_pcm_chmap_t map;		/**< available channel map */

} snd_pcm_chmap_query_t;

snd_pcm_chmap_query_t **snd_pcm_query_chmaps(snd_pcm_t *pcm);

snd_pcm_chmap_query_t **snd_pcm_query_chmaps_from_hw(int card, int dev,

						     int subdev,

						     snd_pcm_stream_t stream);

void snd_pcm_free_chmaps(snd_pcm_chmap_query_t **maps);

snd_pcm_chmap_t *snd_pcm_get_chmap(snd_pcm_t *pcm);

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

const char *snd_pcm_chmap_type_name(enum snd_pcm_chmap_type val);

const char *snd_pcm_chmap_name(enum snd_pcm_chmap_position val);

const char *snd_pcm_chmap_long_name(enum snd_pcm_chmap_position val);

int snd_pcm_chmap_print(const snd_pcm_chmap_t *map, size_t maxlen, char *buf);

unsigned int snd_pcm_chmap_from_string(const char *str);

snd_pcm_chmap_t *snd_pcm_chmap_parse_string(const char *str);

//int snd_pcm_mixer_element(snd_pcm_t *pcm, snd_mixer_t *mixer, snd_mixer_elem_t **elem);

/*

 * application helpers - these functions are implemented on top

 * of the basic API

 */

int snd_pcm_recover(snd_pcm_t *pcm, int err, int silent);

int snd_pcm_set_params(snd_pcm_t *pcm,

                       snd_pcm_format_t format,

                       snd_pcm_access_t access,

                       unsigned int channels,

                       unsigned int rate,

                       int soft_resample,

                       unsigned int latency);

int snd_pcm_get_params(snd_pcm_t *pcm,

                       snd_pcm_uframes_t *buffer_size,

                       snd_pcm_uframes_t *period_size);

/** \} */

/**

 * \defgroup PCM_Info Stream Information

 * \ingroup PCM

 * See the \ref pcm page for more details.

 * \{

 */

size_t snd_pcm_info_sizeof(void);

/** \hideinitializer

 * \brief allocate an invalid #snd_pcm_info_t using standard alloca

 * \param ptr returned pointer

 */

#define snd_pcm_info_alloca(ptr) __snd_alloca(ptr, snd_pcm_info)

int snd_pcm_info_malloc(snd_pcm_info_t **ptr);

void snd_pcm_info_free(snd_pcm_info_t *obj);

void snd_pcm_info_copy(snd_pcm_info_t *dst, const snd_pcm_info_t *src);

unsigned int snd_pcm_info_get_device(const snd_pcm_info_t *obj);

unsigned int snd_pcm_info_get_subdevice(const snd_pcm_info_t *obj);

snd_pcm_stream_t snd_pcm_info_get_stream(const snd_pcm_info_t *obj);

int snd_pcm_info_get_card(const snd_pcm_info_t *obj);

const char *snd_pcm_info_get_id(const snd_pcm_info_t *obj);

const char *snd_pcm_info_get_name(const snd_pcm_info_t *obj);

const char *snd_pcm_info_get_subdevice_name(const snd_pcm_info_t *obj);

snd_pcm_class_t snd_pcm_info_get_class(const snd_pcm_info_t *obj);

snd_pcm_subclass_t snd_pcm_info_get_subclass(const snd_pcm_info_t *obj);

unsigned int snd_pcm_info_get_subdevices_count(const snd_pcm_info_t *obj);

unsigned int snd_pcm_info_get_subdevices_avail(const snd_pcm_info_t *obj);

snd_pcm_sync_id_t snd_pcm_info_get_sync(const snd_pcm_info_t *obj);

void snd_pcm_info_set_device(snd_pcm_info_t *obj, unsigned int val);

void snd_pcm_info_set_subdevice(snd_pcm_info_t *obj, unsigned int val);

void snd_pcm_info_set_stream(snd_pcm_info_t *obj, snd_pcm_stream_t val);

/** \} */

/**

 * \defgroup PCM_HW_Params Hardware Parameters

 * \ingroup PCM

 * See the \ref pcm page for more details.

 * \{

 */

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

int snd_pcm_hw_params_can_mmap_sample_resolution(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_double(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_batch(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_block_transfer(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_monotonic(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_can_overrange(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_can_pause(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_can_resume(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_half_duplex(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_is_joint_duplex(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_can_sync_start(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_can_disable_period_wakeup(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_supports_audio_wallclock_ts(const snd_pcm_hw_params_t *params); /* deprecated, use audio_ts_type */

int snd_pcm_hw_params_supports_audio_ts_type(const snd_pcm_hw_params_t *params, int type);

int snd_pcm_hw_params_get_rate_numden(const snd_pcm_hw_params_t *params,

				      unsigned int *rate_num,

				      unsigned int *rate_den);

int snd_pcm_hw_params_get_sbits(const snd_pcm_hw_params_t *params);

int snd_pcm_hw_params_get_fifo_size(const snd_pcm_hw_params_t *params);

#if 0

typedef struct _snd_pcm_hw_strategy snd_pcm_hw_strategy_t;

/* choices need to be sorted on ascending badness */

typedef struct _snd_pcm_hw_strategy_simple_choices_list {

	unsigned int value;

	unsigned int badness;

} snd_pcm_hw_strategy_simple_choices_list_t;

int snd_pcm_hw_params_strategy(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,

			       const snd_pcm_hw_strategy_t *strategy,

			       unsigned int badness_min,

			       unsigned int badness_max);

void snd_pcm_hw_strategy_free(snd_pcm_hw_strategy_t *strategy);

int snd_pcm_hw_strategy_simple(snd_pcm_hw_strategy_t **strategyp,

			       unsigned int badness_min,

			       unsigned int badness_max);

int snd_pcm_hw_params_try_explain_failure(snd_pcm_t *pcm,

					  snd_pcm_hw_params_t *fail,

					  snd_pcm_hw_params_t *success,

					  unsigned int depth,

					  snd_output_t *out);

#endif

size_t snd_pcm_hw_params_sizeof(void);

/** \hideinitializer

 * \brief allocate an invalid #snd_pcm_hw_params_t using standard alloca

 * \param ptr returned pointer

 */

#define snd_pcm_hw_params_alloca(ptr) __snd_alloca(ptr, snd_pcm_hw_params)

int snd_pcm_hw_params_malloc(snd_pcm_hw_params_t **ptr);

void snd_pcm_hw_params_free(snd_pcm_hw_params_t *obj);

void snd_pcm_hw_params_copy(snd_pcm_hw_params_t *dst, const snd_pcm_hw_params_t *src);

#if !defined(ALSA_LIBRARY_BUILD) && !defined(ALSA_PCM_OLD_HW_PARAMS_API)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

int snd_pcm_hw_params_get_buffer_size(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

int snd_pcm_hw_params_get_buffer_size_min(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

int 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 snd_pcm_hw_params_set_buffer_size_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

int snd_pcm_hw_params_set_buffer_size_first(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

int snd_pcm_hw_params_set_buffer_size_last(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

#endif /* !ALSA_LIBRARY_BUILD && !ALSA_PCM_OLD_HW_PARAMS_API */

int snd_pcm_hw_params_get_min_align(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);

/** \} */

/**

 * \defgroup PCM_SW_Params Software Parameters