Detecting audio device availability using Symbian C++

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Article Metadata

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Compatibility

Platform(s): S60 1st Edition
S60 2nd Edition

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Article

Created: User:Technical writer 2 (14 Apr 2004)

Last edited: hamishwillee (14 Jun 2012)

Overview

Detecting the availability of the audio device

Description

How can I detect when other audio is being played by the system or by another application? How can I test if the audio device is currently busy avoiding an audio conflict situation?

Solution

There is no direct way to check it, but it is possible to try playing a test sample (tone 20 KHz, priority = EMdaPriorityMin, duration = 0 ms). If the return error code is KErrInUse, that media server is being used.
Note: There is a chance that another media client reserves the audio device after making the check.
Example code for tone playback is in the S60 SDK Sound example.