Advanced -Audio Adaptation Framework Overview

This document introduces you to the Advanced Audio Adaptation Framework -(A3F) component.

Purpose

A3F provides the interface between the -Symbian platform and the audio processing hardware for all audio functionality. -A3F is responsible for:

Providing access to -all audio resources
Configuring audio hardware
Playing and recording -audio data
Playing tones.

Required background

In order to use A3F, you should -be familiar with DevSound.

Architectural relationships

A3F is a component -in the Sound Device collection. A3F provides a new standardised implementation -of DevSound which is configured by default from Symbian OS v9.5 onwards. A3F -interacts with a specially customised DevSound (configured as optional).

Shown -below is a representation of how A3F interacts with DevSound and other components:

- A3F and related components - -

Library summary

A3F includes the following libraries:

- - - -Library -Description - - - - -

Audio Component Framework

The Audio Component Framework is responsible for creating audio -contexts.

For more information, see Audio -Component Framework Overview.

- - -

Audio Component Library

The Audio Component Library provides runtime control over audio -streams.

For more information, see Audio -Component Library Overview.

- - - -

Typical uses

You can use A3F to play tones, play -audio and record audio. The following list describes some of the steps involved -in playing and recording audio:

Create a new audio context
Apply changes made to the audio processing units in a context
Configure hardware devices, for example, set sampling rate and channels to -use.
Play buffered audio data
Record audio data to buffers
Pause audio processing
Stop playing audio
Stop recording audio.

See also

DevSound -Overview

Multimedia -Framework Overview

+ + + + + +Advanced +Audio Adaptation Framework Overview +

This document introduces you to the Advanced Audio Adaptation Framework +(A3F) component.

Purpose

A3F provides the interface between the +Symbian platform and the audio processing hardware for all audio functionality. +A3F is responsible for:

Providing access to +all audio resources
Configuring audio hardware
Playing and recording +audio data
Playing tones.

Required background

In order to use A3F, you should +be familiar with DevSound.

Architectural relationships

A3F is a component +in the Sound Device collection. A3F provides a new standardised implementation +of DevSound which is configured by default from Symbian OS v9.5 onwards. A3F +interacts with a specially customised DevSound (configured as optional).

Shown +below is a representation of how A3F interacts with DevSound and other components:

+ A3F and related components + +

Library summary

A3F includes the following libraries:

+ + + +Library +Description + + + + +

Audio Component Framework

The Audio Component Framework is responsible for creating audio +contexts.

For more information, see Audio +Component Framework Overview.

+ + +

Audio Component Library

The Audio Component Library provides runtime control over audio +streams.

For more information, see Audio +Component Library Overview.

+ + + +

Typical uses

You can use A3F to play tones, play +audio and record audio. The following list describes some of the steps involved +in playing and recording audio:

Create a new audio context
Apply changes made to the audio processing units in a context
Configure hardware devices, for example, set sampling rate and channels to +use.
Play buffered audio data
Record audio data to buffers
Pause audio processing
Stop playing audio
Stop recording audio.