The AudioTone class is used to create a frame of audio encoded single or dualtones. More...

#include <audio2.h>

Inheritance diagram for ost::AudioTone:

Collaboration diagram for ost::AudioTone:

Public Types
enum	Rate { rateUnknown, rate6khz = 6000, rate8khz = 8000, rate16khz = 16000, rate32khz = 32000, rate44khz = 44100 }
	Audio encoding rate, samples per second. More...

typedef enum Rate	Rate

enum	Mode { modeRead, modeReadAny, modeReadOne, modeWrite, modeCache, modeInfo, modeFeed, modeAppend, modeCreate }
	File processing mode, whether to skip missing files, etc. More...

typedef enum Mode	Mode

enum	Encoding { unknownEncoding = 0, g721ADPCM, g722Audio, g722_7bit, g722_6bit, g723_2bit, g723_3bit, g723_5bit, gsmVoice, msgsmVoice, mulawAudio, alawAudio, mp1Audio, mp2Audio, mp3Audio, okiADPCM, voxADPCM, sx73Voice, sx96Voice, cdaStereo, cdaMono, pcm8Stereo, pcm8Mono, pcm16Stereo, pcm16Mono, pcm32Stereo, pcm32Mono, speexVoice, speexAudio, g729Audio, ilbcAudio, speexUltra, speexNarrow = speexVoice, speexWide = speexAudio, g723_4bit = g721ADPCM }
	Audio encoding formats. More...

typedef enum Encoding	Encoding

enum	Format { raw, snd, riff, mpeg, wave }
	Audio container file format. More...

typedef enum Format	Format

enum	DeviceMode { PLAY, RECORD, PLAYREC }
	Audio device access mode. More...

typedef enum DeviceMode	DeviceMode

enum	Error { errSuccess = 0, errReadLast, errNotOpened, errEndOfFile, errStartOfFile, errRateInvalid, errEncodingInvalid, errReadInterrupt, errWriteInterrupt, errReadFailure, errWriteFailure, errReadIncomplete, errWriteIncomplete, errRequestInvalid, errTOCFailed, errStatFailed, errInvalidTrack, errPlaybackFailed, errNotPlaying, errNoCodec }
	Audio error conditions. More...

typedef enum Error	Error

typedef int16_t	snd16_t

typedef int32_t	snd32_t

typedef int16_t	Level

typedef int16_t	Sample

typedef int16_t *	Linear

typedef unsigned long	timeout_t

typedef unsigned char *	Encoded

Public Member Functions
Rate	getRate (void)
	Get the sample encoding rate being used for the tone generator. More...

size_t	getSamples (void)
	Get the frame size for the number of audio samples generated. More...

bool	isSilent (void)
	Test if the tone generator is currently set to silence. More...

virtual Linear	getFrame (void)
	Iterate the tone frame, and extract linear samples in native frame. More...

unsigned	getFrames (Linear buffer, unsigned number)
	This is used to copy one or more pages of framed audio quickly to an external buffer. More...

virtual bool	isComplete (void)
	See if at end of tone. More...

	AudioTone (timeout_t duration=20, Rate rate=rate8khz)
	Construct a silent tone generator of specific frame size. More...

	AudioTone (unsigned f1, unsigned f2, Level l1, Level l2, timeout_t duration=20, Rate sample=rate8khz)
	Construct a dual tone frame generator. More...

	AudioTone (unsigned freq, Level level, timeout_t duration=20, Rate sample=rate8khz)
	Construct a single tone frame generator. More...

virtual	~AudioTone ()

Static Public Member Functions
static Level	tolevel (float dbm)
	Convert dbm power level to integer value (0-32768). More...

static float	todbm (Level power)
	Convert integer power levels to dbm. More...

static bool	hasDevice (unsigned device=0)
	Test for the presense of a specified (indexed) audio device. More...

static AudioDevice *	getDevice (unsigned device=0, DeviceMode mode=PLAY)
	Get a audio device object that can be used to play or record audio. More...

static const char *	getCodecPath (void)
	Get pathname to where loadable codec modules are stored. More...

static const char *	getMIME (Info &info)
	Get the mime descriptive type for a given Audio encoding description, usually retrieved from a newly opened audio file. More...

static const char *	getName (Encoding encoding)
	Get the short ascii description used for the given audio encoding type. More...

static const char *	getExtension (Encoding encoding)
	Get the preferred file extension name to use for a given audio encoding type. More...

static Encoding	getEncoding (const char *name)
	Get the audio encoding format that is specified by a short ascii name. More...

static Encoding	getStereo (Encoding encoding)
	Get the stereo encoding format associated with the given format. More...

static Encoding	getMono (Encoding encoding)
	Get the mono encoding format associated with the given format. More...

static bool	isLinear (Encoding encoding)
	Test if the audio encoding format is a linear one. More...

static bool	isBuffered (Encoding encoding)
	Test if the audio encoding format must be packetized (that is, has irregular sized frames) and must be processed only through buffered codecs. More...

static bool	isMono (Encoding encoding)
	Test if the audio encoding format is a mono format. More...

static bool	isStereo (Encoding encoding)
	Test if the audio encoding format is a stereo format. More...

static Rate	getRate (Encoding encoding)
	Return default sample rate associated with the specified audio encoding format. More...

static Rate	getRate (Encoding e, Rate request)
	Return optional rate setting effect. More...

static timeout_t	getFraming (Encoding encoding, timeout_t timeout=0)
	Return frame timing for an audio encoding format. More...

static timeout_t	getFraming (Info &info, timeout_t timeout=0)
	Return frame time for an audio source description. More...

static bool	isEndian (Encoding encoding)
	Test if the endian byte order of the encoding format is different from the machine's native byte order. More...

static bool	isEndian (Info &info)
	Test if the endian byte order of the audio source description is different from the machine's native byte order. More...

static bool	swapEndian (Encoding encoding, void *buffer, unsigned number)
	Optionally swap endian of audio data if the encoding format endian byte order is different from the machine's native endian. More...

static bool	swapEndian (Info &info, void *buffer, unsigned number)
	Optionally swap endian of audio data if the audio source description byte order is different from the machine's native endian byte order. More...

static void	swapEncoded (Info &info, Encoded data, size_t bytes)
	Optionally swap endian of encoded audio data based on the audio encoding type, and relationship to native byte order. More...

static Level	getImpulse (Encoding encoding, void *buffer, unsigned number)
	Get the energey impulse level of a frame of audio data. More...

static Level	getImpulse (Info &info, void *buffer, unsigned number=0)
	Get the energey impulse level of a frame of audio data. More...

static Level	getPeak (Encoding encoding, void *buffer, unsigned number)
	Get the peak (highest energy) level found in a frame of audio data. More...

static Level	getPeak (Info &info, void *buffer, unsigned number=0)
	Get the peak (highest energy) level found in a frame of audio data. More...

static void	toTimestamp (timeout_t duration, char *address, size_t size)
	Provide ascii timestamp representation of a timeout value. More...

static timeout_t	toTimeout (const char *timestamp)
	Convert ascii timestamp representation to a timeout number. More...

static int	getFrame (Encoding encoding, int samples=0)
	Returns the number of bytes in a sample frame for the given encoding type, rounded up to the nearest integer. More...

static int	getCount (Encoding encoding)
	Returns the number of samples in all channels for a frame in the given encoding. More...

static unsigned long	toSamples (Encoding encoding, size_t bytes)
	Compute byte counts of audio data into number of samples based on the audio encoding format used. More...

static unsigned long	toSamples (Info &info, size_t bytes)
	Compute byte counts of audio data into number of samples based on the audio source description used. More...

static size_t	toBytes (Info &info, unsigned long number)
	Compute the number of bytes a given number of samples in a given audio encoding will occupy. More...

static size_t	toBytes (Encoding encoding, unsigned long number)
	Compute the number of bytes a given number of samples in a given audio encoding will occupy. More...

static void	fill (unsigned char *address, int number, Encoding encoding)
	Fill an audio buffer with "empty" (silent) audio data, based on the audio encoding format. More...

static bool	loadPlugin (const char *path)
	Load a dso plugin (codec plugin), used internally... More...

static size_t	maxFramesize (Info &info)
	Maximum framesize for a given coding that may be needed to store a result. More...

Static Public Attributes
static const unsigned	ndata

Protected Member Functions
void	silence (void)
	Set the frame to silent. More...

void	reset (void)
	Reset the tone generator completely. More...

void	cleanup (void)
	Cleanup for virtual destructors to use. More...

void	single (unsigned freq, Level level)
	Set frame to generate single tone... More...

void	dual (unsigned f1, unsigned f2, Level l1, Level l2)
	Set frame to generate dual tone... More...

Protected Attributes
Rate	rate

unsigned	samples

Linear	frame

double	df1

double	df2

double	p1

double	p2

Level	m1

Level	m2

bool	silencer

Detailed Description

The AudioTone class is used to create a frame of audio encoded single or dualtones.

The frame will be iterated for each request, so a continual tone can be extracted by frame.

Author: David Sugar dyfet.nosp@m.@ost.nosp@m.el.co.nosp@m.m audio tone generator class.

Definition at line 774 of file audio2.h.

Member Typedef Documentation

typedef enum DeviceMode ost::Audio::DeviceMode

inherited

Definition at line 247 of file audio2.h.

typedef unsigned char* ost::Audio::Encoded

inherited

Definition at line 143 of file audio2.h.

typedef enum Encoding ost::Audio::Encoding

inherited

Definition at line 225 of file audio2.h.

typedef enum Error ost::Audio::Error

inherited

Definition at line 274 of file audio2.h.

typedef enum Format ost::Audio::Format

inherited

Definition at line 237 of file audio2.h.

typedef int16_t ost::Audio::Level

inherited

Definition at line 101 of file audio2.h.

typedef int16_t* ost::Audio::Linear

inherited

Definition at line 103 of file audio2.h.

typedef enum Mode ost::Audio::Mode

inherited

Definition at line 175 of file audio2.h.

typedef enum Rate ost::Audio::Rate

inherited

Definition at line 157 of file audio2.h.

typedef int16_t ost::Audio::Sample

inherited

Definition at line 102 of file audio2.h.

typedef int16_t ost::Audio::snd16_t

inherited

Definition at line 99 of file audio2.h.

typedef int32_t ost::Audio::snd32_t

inherited

Definition at line 100 of file audio2.h.

typedef unsigned long ost::Audio::timeout_t

inherited

Definition at line 104 of file audio2.h.

Member Enumeration Documentation

enum ost::Audio::DeviceMode

inherited

Audio device access mode.

Enumerator
PLAY
RECORD
PLAYREC

Definition at line 242 of file audio2.h.

enum ost::Audio::Encoding

inherited

Audio encoding formats.

Enumerator
unknownEncoding
g721ADPCM
g722Audio
g722_7bit
g722_6bit
g723_2bit
g723_3bit
g723_5bit
gsmVoice
msgsmVoice
mulawAudio
alawAudio
mp1Audio
mp2Audio
mp3Audio
okiADPCM
voxADPCM
sx73Voice
sx96Voice
cdaStereo
cdaMono
pcm8Stereo
pcm8Mono
pcm16Stereo
pcm16Mono
pcm32Stereo
pcm32Mono
speexVoice
speexAudio
g729Audio
ilbcAudio
speexUltra
speexNarrow
speexWide
g723_4bit

Definition at line 180 of file audio2.h.

enum ost::Audio::Error

inherited

Audio error conditions.

Enumerator
errSuccess
errReadLast
errNotOpened
errEndOfFile
errStartOfFile
errRateInvalid
errEncodingInvalid
errReadInterrupt
errWriteInterrupt
errReadFailure
errWriteFailure
errReadIncomplete
errWriteIncomplete
errRequestInvalid
errTOCFailed
errStatFailed
errInvalidTrack
errPlaybackFailed
errNotPlaying
errNoCodec

Definition at line 252 of file audio2.h.

enum ost::Audio::Format

inherited

Audio container file format.

Enumerator
raw
snd
riff
mpeg
wave

Definition at line 230 of file audio2.h.

enum ost::Audio::Mode

inherited

File processing mode, whether to skip missing files, etc.

Enumerator
modeRead
modeReadAny
modeReadOne
modeWrite
modeCache
modeInfo
modeFeed
modeAppend
modeCreate

Definition at line 162 of file audio2.h.

enum ost::Audio::Rate

inherited

Audio encoding rate, samples per second.

Enumerator
rateUnknown
rate6khz
rate8khz
rate16khz
rate32khz
rate44khz

Definition at line 148 of file audio2.h.

Constructor & Destructor Documentation

ost::AudioTone::AudioTone	(	timeout_t	duration = `20`,
		Rate	rate = `rate8khz`
	)

Construct a silent tone generator of specific frame size.

Parameters

duration	of frame in milliseconds.
rate	of samples.

ost::AudioTone::AudioTone	(	unsigned	f1,
		unsigned	f2,
		Level	l1,
		Level	l2,
		timeout_t	duration = `20`,
		Rate	sample = `rate8khz`
	)

Construct a dual tone frame generator.

Parameters

f1	frequency of tone 1.
f2	frequency of tone 2.
l1	level of tone 1.
l2	level of tone 2.
duration	of frame in milliseconds.
sample	rate being generated.

ost::AudioTone::AudioTone	(	unsigned	freq,
		Level	level,
		timeout_t	duration = `20`,
		Rate	sample = `rate8khz`
	)

Construct a single tone frame generator.

Parameters

freq	of tone.
level	of tone.
duration	of frame in milliseconds.
sample	rate being generated.

virtual ost::AudioTone::~AudioTone ( )

virtual

Member Function Documentation

void ost::AudioTone::cleanup ( void )

protected

Cleanup for virtual destructors to use.

void ost::AudioTone::dual	(	unsigned	f1,
		unsigned	f2,
		Level	l1,
		Level	l2
	)

protected

Set frame to generate dual tone...

Parameters

f1	frequency of tone 1
f2	frequency of tone 2
l1	level of tone 1
l2	level of tone 2

static void ost::Audio::fill	(	unsigned char *	address,
		int	number,
		Encoding	encoding
	)

staticinherited

Fill an audio buffer with "empty" (silent) audio data, based on the audio encoding format.

Parameters

address	of data to fill.
number	of samples to fill.
encoding	format of data.

static const char* ost::Audio::getCodecPath ( void )

staticinherited

Get pathname to where loadable codec modules are stored.

Returns: file path to loadable codecs.

static int ost::Audio::getCount ( Encoding encoding )

staticinherited

Returns the number of samples in all channels for a frame in the given encoding.

For example, pcm32Stereo has a frame size of 8 bytes: Note that different codecs have different definitions of a frame - for example, compressed encodings have a rather large frame size relative to the sample size due to the way bytes are fed to the decompression engine.

Parameters

encoding The encoding to calculate the frame sample count for.

Returns: samples The number of samples in a frame of the given encoding.

static AudioDevice* ost::Audio::getDevice	(	unsigned	device = `0`,
		DeviceMode	mode = `PLAY`
	)

staticinherited

Get a audio device object that can be used to play or record audio.

This is normally a local soundcard, though an abstract base class is returned, so the underlying device may be different.

Parameters

device	index or 0 for default audio device.
mode	of device; play, record, or full duplex.

Returns: pointer to abstract audio device object interface class.

static Encoding ost::Audio::getEncoding ( const char * name )

staticinherited

Get the audio encoding format that is specified by a short ascii name.

This will either accept names like those returned from getName(), or .xxx file extensions, and return the audio encoding type associated with the name or extension.

Parameters

name	of encoding or file extension.

Returns: audio encoding format.

See Also: getName

static const char* ost::Audio::getExtension ( Encoding encoding )

staticinherited

Get the preferred file extension name to use for a given audio encoding type.

Parameters

encoding format.

Returns: ascii file extension to use.

static int ost::Audio::getFrame	(	Encoding	encoding,
		int	samples = `0`
	)

staticinherited

Returns the number of bytes in a sample frame for the given encoding type, rounded up to the nearest integer.

A frame is defined as the minimum number of bytes necessary to create a point or points in the output waveform for all output channels. For example, 16-bit mono PCM has a frame size of two (because those two bytes constitute a point in the output waveform). GSM has it's own definition of a frame which involves decompressing a sequence of bytes to determine the final points on the output waveform. The minimum number of bytes you can feed to the decompression engine is 32.5 (260 bits), so this function will return 33 (because we round up) given an encoding type of GSM. Other compressed encodings will return similar results. Be prepared to deal with nonintuitive return values for rare encodings.

Parameters

encoding	The encoding type to get the frame size for.
samples	Reserved. Use zero.

Returns: The number of bytes in a frame for the given encoding.

virtual Linear ost::AudioTone::getFrame ( void )

virtual

Iterate the tone frame, and extract linear samples in native frame.

If endian flag passed, then convert for standard endian representation (byte swap) if needed.

Returns: pointer to samples.

Reimplemented in ost::MFTones, ost::DTMFTones, and ost::TelTone.

unsigned ost::AudioTone::getFrames	(	Linear	buffer,
		unsigned	number
	)

This is used to copy one or more pages of framed audio quickly to an external buffer.

Returns: number of frames copied.

Parameters

buffer	to copy into.
number	of frames requested.

static timeout_t ost::Audio::getFraming	(	Encoding	encoding,
		timeout_t	timeout = `0`
	)

staticinherited

Return frame timing for an audio encoding format.

Returns: frame time to use in milliseconds.

Parameters

encoding	of frame to get timing segment for.
timeout	of frame time segment to request.

static timeout_t ost::Audio::getFraming	(	Info &	info,
		timeout_t	timeout = `0`
	)

staticinherited

Return frame time for an audio source description.

Returns: frame time to use in milliseconds.

Parameters

info	descriptor of frame encoding to get timing segment for.
timeout	of frame time segment to request.

static Level ost::Audio::getImpulse	(	Encoding	encoding,
		void *	buffer,
		unsigned	number
	)

staticinherited

Get the energey impulse level of a frame of audio data.

Returns: impulse energy level of audio data.

Parameters

encoding	format of data to examine.
buffer	of audio data to examine.
number	of audio samples to examine.

static Level ost::Audio::getImpulse	(	Info &	info,
		void *	buffer,
		unsigned	number = `0`
	)

staticinherited

Get the energey impulse level of a frame of audio data.

Returns: impulse energy level of audio data.

Parameters

info	encoding source description object.
buffer	of audio data to examine.
number	of audio samples to examine.

static const char* ost::Audio::getMIME ( Info & info )

staticinherited

Get the mime descriptive type for a given Audio encoding description, usually retrieved from a newly opened audio file.

Parameters

info	source description object

Returns: text of mime type to use for this audio source.

static Encoding ost::Audio::getMono ( Encoding encoding )

staticinherited

Get the mono encoding format associated with the given format.

Parameters

encoding format.

Returns: associated mono audio encoding format.

static const char* ost::Audio::getName ( Encoding encoding )

staticinherited

Get the short ascii description used for the given audio encoding type.

Parameters

encoding format.

Returns: ascii name of encoding format.

static Level ost::Audio::getPeak	(	Encoding	encoding,
		void *	buffer,
		unsigned	number
	)

staticinherited

Get the peak (highest energy) level found in a frame of audio data.

Returns: peak energy level found in data.

Parameters

encoding	format of data.
buffer	of audio data.
number	of samples to examine.

static Level ost::Audio::getPeak	(	Info &	info,
		void *	buffer,
		unsigned	number = `0`
	)

staticinherited

Get the peak (highest energy) level found in a frame of audio data.

Returns: peak energy level found in data.

Parameters

info	description object of audio data.
buffer	of audio data.
number	of samples to examine.

static Rate ost::Audio::getRate ( Encoding encoding )

staticinherited

Return default sample rate associated with the specified audio encoding format.

Returns: sample rate for audio data.

Parameters

encoding format.

static Rate ost::Audio::getRate	(	Encoding	e,
		Rate	request
	)

staticinherited

Return optional rate setting effect.

Many codecs are fixed rate.

Returns: result rate for audio date.

Parameters

encoding	format.
requested	rate.

Rate ost::AudioTone::getRate ( void )

inline

Get the sample encoding rate being used for the tone generator.

Returns: sample rate in samples per second.

Definition at line 823 of file audio2.h.

size_t ost::AudioTone::getSamples ( void )

inline

Get the frame size for the number of audio samples generated.

Returns: number of samples processed in frame.

Definition at line 831 of file audio2.h.

static Encoding ost::Audio::getStereo ( Encoding encoding )

staticinherited

Get the stereo encoding format associated with the given format.

Parameters

encoding format being tested for stereo.

Returns: associated stereo audio encoding format.

static bool ost::Audio::hasDevice ( unsigned device = 0 )

staticinherited

Test for the presense of a specified (indexed) audio device.

This is normally used to test for local soundcard access.

Parameters

device index or 0 for default audio device.

Returns: true if device exists.

static bool ost::Audio::isBuffered ( Encoding encoding )

staticinherited

Test if the audio encoding format must be packetized (that is, has irregular sized frames) and must be processed only through buffered codecs.

Returns: true if packetized audio.

Parameters

encoding format.

virtual bool ost::AudioTone::isComplete ( void )

virtual

See if at end of tone.

This is used for non-continues audio tones, or to detect "break" events.

Returns: true if end of data.

Reimplemented in ost::MFTones, ost::DTMFTones, and ost::TelTone.

static bool ost::Audio::isEndian ( Encoding encoding )

staticinherited

Test if the endian byte order of the encoding format is different from the machine's native byte order.

Returns: true if endian format is different.

Parameters

encoding format.

static bool ost::Audio::isEndian ( Info & info )

staticinherited

Test if the endian byte order of the audio source description is different from the machine's native byte order.

Returns: true if endian format is different.

Parameters

info	source description object.

static bool ost::Audio::isLinear ( Encoding encoding )

staticinherited

Test if the audio encoding format is a linear one.

Returns: true if encoding format is linear audio data.

Parameters

encoding format.

static bool ost::Audio::isMono ( Encoding encoding )

staticinherited

Test if the audio encoding format is a mono format.

Returns: true if encoding format is mono audio data.

Parameters

encoding format.

bool ost::AudioTone::isSilent ( void )

Test if the tone generator is currently set to silence.

Returns: true if generator set for silence.

static bool ost::Audio::isStereo ( Encoding encoding )

staticinherited

Test if the audio encoding format is a stereo format.

Returns: true if encoding format is stereo audio data.

Parameters

encoding format.

static bool ost::Audio::loadPlugin ( const char * path )

staticinherited

Load a dso plugin (codec plugin), used internally...

Returns: true if loaded.

Parameters

path to codec.

static size_t ost::Audio::maxFramesize ( Info & info )

staticinherited

Maximum framesize for a given coding that may be needed to store a result.

Parameters

info	source description object.

Returns: maximum possible frame size to allocate for encoded data.

void ost::AudioTone::reset ( void )

protected

Reset the tone generator completely.

Produces silence.,

void ost::AudioTone::silence ( void )

protected

Set the frame to silent.

void ost::AudioTone::single	(	unsigned	freq,
		Level	level
	)

protected

Set frame to generate single tone...

Parameters

freq	of tone.
level	of tone.

static void ost::Audio::swapEncoded	(	Info &	info,
		Encoded	data,
		size_t	bytes
	)

staticinherited

Optionally swap endian of encoded audio data based on the audio encoding type, and relationship to native byte order.

Parameters

info	source description of object.
buffer	of audio data.
number	of bytes of audio data.

static bool ost::Audio::swapEndian	(	Encoding	encoding,
		void *	buffer,
		unsigned	number
	)

staticinherited

Optionally swap endian of audio data if the encoding format endian byte order is different from the machine's native endian.

Returns: true if endian format was different.

Parameters

encoding	format of data.
buffer	of audio data.
number	of audio samples.

static bool ost::Audio::swapEndian	(	Info &	info,
		void *	buffer,
		unsigned	number
	)

staticinherited

Optionally swap endian of audio data if the audio source description byte order is different from the machine's native endian byte order.

Returns: true if endian format was different.

Parameters

info	source description object of data.
buffer	of audio data.
number	of audio samples.

static size_t ost::Audio::toBytes	(	Info &	info,
		unsigned long	number
	)

staticinherited

Compute the number of bytes a given number of samples in a given audio encoding will occupy.

Returns: number of bytes samples will occupy.

Parameters

info	encoding source description.
number	of samples.

static size_t ost::Audio::toBytes	(	Encoding	encoding,
		unsigned long	number
	)

staticinherited

Compute the number of bytes a given number of samples in a given audio encoding will occupy.

Returns: number of bytes samples will occupy.

Parameters

encoding	format.
number	of samples.

static float ost::Audio::todbm ( Level power )

staticinherited

Convert integer power levels to dbm.

Parameters

power level.

Returns: dbm power level.

static Level ost::Audio::tolevel ( float dbm )

staticinherited

Convert dbm power level to integer value (0-32768).

Parameters

dbm	power level

Returns: integer value.

static unsigned long ost::Audio::toSamples	(	Encoding	encoding,
		size_t	bytes
	)

staticinherited

Compute byte counts of audio data into number of samples based on the audio encoding format used.

Returns: number of audio samples in specified data.

Parameters

encoding	format.
bytes	of data.

static unsigned long ost::Audio::toSamples	(	Info &	info,
		size_t	bytes
	)

staticinherited

Compute byte counts of audio data into number of samples based on the audio source description used.

Returns: number of audio samples in specified data.

Parameters

info	encoding source description.
bytes	of data.

static timeout_t ost::Audio::toTimeout ( const char * timestamp )

staticinherited

Convert ascii timestamp representation to a timeout number.

Parameters

timestamp ascii data.

Returns: timeout_t duration from data.

static void ost::Audio::toTimestamp	(	timeout_t	duration,
		char *	address,
		size_t	size
	)

staticinherited

Provide ascii timestamp representation of a timeout value.

Parameters

duration	timeout value
address	for ascii data.
size	of ascii data.

Field Documentation

double ost::AudioTone::df1

protected

Definition at line 780 of file audio2.h.

double ost::AudioTone::df2

protected

Definition at line 780 of file audio2.h.

Linear ost::AudioTone::frame

protected

Definition at line 779 of file audio2.h.

Level ost::AudioTone::m1

protected

Definition at line 781 of file audio2.h.

Level ost::AudioTone::m2

protected

Definition at line 781 of file audio2.h.

const unsigned ost::Audio::ndata

staticinherited

Definition at line 107 of file audio2.h.

double ost::AudioTone::p1

protected

Definition at line 780 of file audio2.h.

double ost::AudioTone::p2

protected

Definition at line 780 of file audio2.h.

Rate ost::AudioTone::rate

protected

Definition at line 777 of file audio2.h.

unsigned ost::AudioTone::samples

protected

Definition at line 778 of file audio2.h.

bool ost::AudioTone::silencer

protected

Definition at line 782 of file audio2.h.

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

audio2.h

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