pj::ExtraAudioDevice Class Reference

#include <media.hpp>

Inheritance diagram for pj::ExtraAudioDevice:

Public Member Functions
	ExtraAudioDevice (int playdev, int recdev)
virtual	~ExtraAudioDevice ()
void	open ()
void	close ()
bool	isOpened ()
Public Member Functions inherited from pj::AudioMedia
ConfPortInfo	getPortInfo () const throw (Error)
int	getPortId () const
void	startTransmit (const AudioMedia &sink) const throw (Error)
void	startTransmit2 (const AudioMedia &sink, const AudioMediaTransmitParam &param) const throw (Error)
void	stopTransmit (const AudioMedia &sink) const throw (Error)
void	adjustRxLevel (float level) throw (Error)
void	adjustTxLevel (float level) throw (Error)
unsigned	getRxLevel () const throw (Error)
unsigned	getTxLevel () const throw (Error)
	AudioMedia ()
virtual	~AudioMedia ()
Public Member Functions inherited from pj::Media
virtual	~Media ()
pjmedia_type	getType () const

Protected Attributes
int	playDev
int	recDev
void *	ext_snd_dev
Protected Attributes inherited from pj::AudioMedia
int	id

Additional Inherited Members
Static Public Member Functions inherited from pj::AudioMedia
static ConfPortInfo	getPortInfoFromId (int port_id) throw (Error)
static AudioMedia *	typecastFromMedia (Media *media)
Protected Member Functions inherited from pj::AudioMedia
void	registerMediaPort (MediaPort port) throw (Error)
void	registerMediaPort2 (MediaPort port, pj_pool_t *pool) throw (Error)
void	unregisterMediaPort ()
Protected Member Functions inherited from pj::Media
	Media (pjmedia_type med_type)

Detailed Description

Extra audio device. This class allows application to have multiple sound device instances active concurrently.

Application may also use this class to improve media clock. Normally media clock is driven by sound device in master port, but unfortunately some sound devices may produce jittery clock. To improve media clock, application can install Null Sound Device (i.e: using AudDevManager::setNullDev()), which will act as a master port, and install the sound device as extra sound device.

Note that extra sound device will not have auto-close upon idle feature. Also note that the extra sound device only supports mono channel.

Constructor & Destructor Documentation

ExtraAudioDevice()

pj::ExtraAudioDevice::ExtraAudioDevice	(	int	playdev,
		int	recdev
	)

Constructor.

Parameters

playdev	Playback device ID.
recdev	Record device ID.

~ExtraAudioDevice()

virtual pj::ExtraAudioDevice::~ExtraAudioDevice ( )

virtual

Destructor.

Member Function Documentation

open()

void pj::ExtraAudioDevice::open

(

)

Open the audio device using format (e.g.: clock rate, bit per sample, samples per frame) matched to the conference bridge's format, except the channel count, which will be set to one (mono channel). This will also register the audio device port to conference bridge.

close()

void pj::ExtraAudioDevice::close

(

)

Close the audio device and unregister the audio device port from the conference bridge.

isOpened()

bool pj::ExtraAudioDevice::isOpened

(

)

Is the extra audio device opened?

Returns

'true' if it is opened.

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

• media.hpp