Ms::AlsaDriver Class Reference

#include <alsa.h>

Public Member Functions
	AlsaDriver (QString, unsigned, snd_pcm_uframes_t, unsigned)
	~AlsaDriver ()
bool	init ()
void	printinfo ()
bool	pcmStart ()
int	pcmStop ()
snd_pcm_uframes_t	fsize () const
unsigned int	sampleRate () const
void	write (int n, float *l, float *r)

Private Types
enum	{ MAXPFD = 8, MAXPLAY = 4 }
typedef char *(*	play_function) (const float *, char *, int, int)
typedef char *(*	clear_function) (char *, int, int)

Private Member Functions
bool	setHwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar)
bool	setSwpar (snd_pcm_t *handle, snd_pcm_sw_params_t *swpar)
bool	recover ()
int	playInit (snd_pcm_uframes_t len)
snd_pcm_sframes_t	pcmWait ()
snd_pcm_t *	playHandle () const
void	clearChan (int chan, snd_pcm_uframes_t len)

Static Private Member Functions
static char *	clear_32le (char *dst, int step, int nfrm)
static char *	clear_24le (char *dst, int step, int nfrm)
static char *	clear_16le (char *dst, int step, int nfrm)
static char *	play_32le (const float *src, char *dst, int step, int nfrm)
static char *	play_24le (const float *src, char *dst, int step, int nfrm)
static char *	play_16le (const float *src, char *dst, int step, int nfrm)

Private Attributes
QString	_name
unsigned int	_rate
snd_pcm_uframes_t	_frsize
unsigned int	_nfrags
snd_pcm_format_t	_play_format
snd_pcm_access_t	_play_access
snd_pcm_t *	_play_handle
snd_pcm_hw_params_t *	_play_hwpar
snd_pcm_sw_params_t *	_play_swpar
unsigned int	_play_nchan
int	_play_npfd
PollFd	_pfd [MAXPFD]
snd_pcm_uframes_t	_capt_offs
snd_pcm_uframes_t	_play_offs
int	_play_step
char *	_play_ptr [MAXPLAY]
int	_stat
int	_pcnt
bool	_xrun
clear_function	_clear_func
play_function	_play_func
bool	mmappedInterface

Member Typedef Documentation

clear_function

typedef char*(* Ms::AlsaDriver::clear_function) (char *, int, int)

private

play_function

typedef char*(* Ms::AlsaDriver::play_function) (const float *, char *, int, int)

private

Member Enumeration Documentation

anonymous enum

anonymous enum

private

Enumerator
MAXPFD
MAXPLAY

Constructor & Destructor Documentation

AlsaDriver()

Ms::AlsaDriver::AlsaDriver	(	QString	,
		unsigned	,
		snd_pcm_uframes_t	,
		unsigned
	)

~AlsaDriver()

Ms::AlsaDriver::~AlsaDriver

(

)

Member Function Documentation

clear_16le()

static char* Ms::AlsaDriver::clear_16le ( char *  dst, int  step, int  nfrm  )

staticprivate

clear_24le()

static char* Ms::AlsaDriver::clear_24le ( char *  dst, int  step, int  nfrm  )

staticprivate

clear_32le()

static char* Ms::AlsaDriver::clear_32le ( char *  dst, int  step, int  nfrm  )

staticprivate

clearChan()

void Ms::AlsaDriver::clearChan ( int  chan, snd_pcm_uframes_t  len  )

inlineprivate

fsize()

snd_pcm_uframes_t Ms::AlsaDriver::fsize ( ) const

inline

init()

bool Ms::AlsaDriver::init

(

)

pcmStart()

bool Ms::AlsaDriver::pcmStart

(

)

pcmStop()

int Ms::AlsaDriver::pcmStop

(

)

pcmWait()

snd_pcm_sframes_t Ms::AlsaDriver::pcmWait ( )

private

play_16le()

static char* Ms::AlsaDriver::play_16le ( const float *  src, char *  dst, int  step, int  nfrm  )

staticprivate

play_24le()

static char* Ms::AlsaDriver::play_24le ( const float *  src, char *  dst, int  step, int  nfrm  )

staticprivate

play_32le()

static char* Ms::AlsaDriver::play_32le ( const float *  src, char *  dst, int  step, int  nfrm  )

staticprivate

playHandle()

snd_pcm_t* Ms::AlsaDriver::playHandle ( ) const

inlineprivate

playInit()

int Ms::AlsaDriver::playInit ( snd_pcm_uframes_t  len )

private

printinfo()

void Ms::AlsaDriver::printinfo

(

)

recover()

bool Ms::AlsaDriver::recover ( )

private

sampleRate()

unsigned int Ms::AlsaDriver::sampleRate ( ) const

inline

setHwpar()

bool Ms::AlsaDriver::setHwpar ( snd_pcm_t *  handle, snd_pcm_hw_params_t *  hwpar  )

private

setSwpar()

bool Ms::AlsaDriver::setSwpar ( snd_pcm_t *  handle, snd_pcm_sw_params_t *  swpar  )

private

write()

void Ms::AlsaDriver::write	(	int	n,
		float *	l,
		float *	r
	)

Member Data Documentation

_capt_offs

snd_pcm_uframes_t Ms::AlsaDriver::_capt_offs

private

_clear_func

clear_function Ms::AlsaDriver::_clear_func

private

_frsize

snd_pcm_uframes_t Ms::AlsaDriver::_frsize

private

_name

QString Ms::AlsaDriver::_name

private

_nfrags

unsigned int Ms::AlsaDriver::_nfrags

private

_pcnt

int Ms::AlsaDriver::_pcnt

private

_pfd

PollFd Ms::AlsaDriver::_pfd[MAXPFD]

private

_play_access

snd_pcm_access_t Ms::AlsaDriver::_play_access

private

_play_format

snd_pcm_format_t Ms::AlsaDriver::_play_format

private

_play_func

play_function Ms::AlsaDriver::_play_func

private

_play_handle

snd_pcm_t* Ms::AlsaDriver::_play_handle

private

_play_hwpar

snd_pcm_hw_params_t* Ms::AlsaDriver::_play_hwpar

private

_play_nchan

unsigned int Ms::AlsaDriver::_play_nchan

private

_play_npfd

int Ms::AlsaDriver::_play_npfd

private

_play_offs

snd_pcm_uframes_t Ms::AlsaDriver::_play_offs

private

_play_ptr

char* Ms::AlsaDriver::_play_ptr[MAXPLAY]

private

_play_step

int Ms::AlsaDriver::_play_step

private

_play_swpar

snd_pcm_sw_params_t* Ms::AlsaDriver::_play_swpar

private

_rate

unsigned int Ms::AlsaDriver::_rate

private

_stat

int Ms::AlsaDriver::_stat

private

_xrun

bool Ms::AlsaDriver::_xrun

private

mmappedInterface

bool Ms::AlsaDriver::mmappedInterface

private

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The documentation for this class was generated from the following file:

• mscore/alsa.h