ost::TelTone

ost::TelTone Class Reference

An object that is used to sequence and extract telephony tones based on a telephony tone descriptor retrieved from the parsed international telephony tone database.telephony tone sequencing object. More...

#include <audio2.h>

Inheritance diagram for ost::TelTone:

List of all members.


Public Types
typedef ost::TelTone::_tonedef	tonedef_t
typedef ost::TelTone::_tonekey	tonekey_t
Public Member Functions
	TelTone (tonekey_t *key, Level level, timeout_t frame=20)
	Create a tone sequencing object for a specific telephony tone key id.
	~TelTone ()
Linear	getFrame (void)
	Generate and retrieve one frame of linear audio data for the telephony tone sequence being created.
bool	isComplete (void)
	Check if all audio frames for this tone has been created.
Static Public Member Functions
static bool	load (const char pathname, const char locale=NULL)
	Load a teltones database file into memory.
static tonekey_t *	find (const char tone, const char locale=NULL)
	find an entry in the teltones database.
Protected Attributes
tonekey_t *	tone
tonedef_t *	def
unsigned	remaining
unsigned	silent
unsigned	count
timeout_t	framing
Level	level
bool	complete
Classes
struct	_tonedef
struct	_tonekey

Detailed Description

An object that is used to sequence and extract telephony tones based on a telephony tone descriptor retrieved from the parsed international telephony tone database.telephony tone sequencing object.

Author:: David Sugar <dyfet@ostel.com>

Member Typedef Documentation

typedef struct ost::TelTone::_tonedef ost::TelTone::tonedef_t

typedef struct ost::TelTone::_tonekey ost::TelTone::tonekey_t

Constructor & Destructor Documentation

ost::TelTone::TelTone ( tonekey_t * key,

Level level,

timeout_t frame = 20

)

Create a tone sequencing object for a specific telephony tone key id.

Parameters:

key for telephony tone.

level for generated tones.

frame timing to use in processing.

ost::TelTone::~TelTone ( )

Member Function Documentation

static tonekey_t* ost::TelTone::find ( const char * tone,

const char * locale = NULL

) [static]

find an entry in the teltones database.

Returns:
key of tone list if found, else NULL

Parameters:

tone name

locale to optionally search under

Linear ost::TelTone::getFrame ( void ) [virtual]

Generate and retrieve one frame of linear audio data for the telephony tone sequence being created.

Returns:
pointer to samples generated.

Reimplemented from ost::AudioTone.

bool ost::TelTone::isComplete ( void ) [virtual]

Check if all audio frames for this tone has been created.
Some telephony tones, such as dialtone, may be infinite...

Returns:
true if audio is complete.

Reimplemented from ost::AudioTone.

static bool ost::TelTone::load ( const char * pathname,

const char * locale = NULL

) [static]

Load a teltones database file into memory.

Returns:
true if successful

Parameters:

pathname of file to load.

locale to optionally load.