Adding listener's location effects to the Symbian C++ audio player
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Code Example
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Platform Security
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Overview
The S60 platform has several audio enhancement APIs that can be used to modify the audio experience. One of them is the CListenerLocation API. This API makes the listener's location for the audio source appear to change.
This snippet can be self-signed.
Preconditions
The audio player must be fully constructed before constructing the instance of the API. This can be done with the following lines of code:
iMdaAudioPlayerUtility =
CMdaAudioPlayerUtility::NewFilePlayerL(aFileName,
*this,
EMdaPriorityNormal,
EMdaPriorityPreferenceTimeAndQuality);
MMP file
The following capabilities and libraries are required:
CAPABILITY NONE
LIBRARY ListenerLocationEffect.lib
HEADER ListenerLocationBase.h
Source file
First you need to construct the reverb utility instance:
iListener = CListenerLocation::NewL( *iMdaAudioPlayerUtility );
To set the listener's location effect on, you need to set the X,Y, and Z coordinates for the listener, and then enable and apply the effect on the player.
iListener->SetLocationCartesianL( iPositionX, iPositionY, iPositionZ );
if(!iListener->IsEnabled())
iListener->EnableL();
iListener->ApplyL();
You can also add a 3D effect by having a timer that periodically changes the coordinates of the effect.
To set the listeners location effect off, just call the following line of code:
iListener->DisableL();
Test application
See also
Adding doppler effects to the audio player in Symbian C++
Adding source location effects to the Symbian C++ audio player
Adding bass boost to the Symbian C++ audio player
Adding stereo widening to the Symbian C++ audio player
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