Absolute Volume Controller Overview

Purpose

Absolute Volume Controller controls and observes the volume setting on a target device such as a Bluetooth headset.

Absolute Volume Controller library details

The DLL that provides the functionality and the library to which your code must link is identified below.

Architecture

Absolute Volume Controller is a RemCon controller interface.

Description

Absolute Volume Controller:

• sends a command to set an absolute volume level. This allows a client application to control the volume on a remote device.

• receives notification when the volume changes on the target device. For example this allows the application to display a graphic showing the current volume level or to respond to the absolute volume being set to zero.

Key classes

The key classes required for Absolute Volume Controller are:

• CRemConInterfaceSelector

  Register with this selector to send/receive remote control commands and notifications.

• CRemConAbsoluteVolumeController

  The object used by an application to send absolute volume commands, and to register to receive volume change confirmation events using the MRemConAbsoluteVolumeControllerObserver

• MRemConAbsoluteVolumeControllerObserver

  An object used to receive absolute volume events from the target. Only a change in volume will be notified to the observer.

Using Absolute Volume Controller

Absolute Volume Controller enables a Symbian device to receive the volume setting of an attached device such as Bluetooth headset or a car stereo, and to change that volume setting.