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Adding equalizer to the Symbian C++ audio player

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__NOTOC__
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{{ArticleMetaData <!-- v1.2 -->
__NOEDITSECTION__
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|sourcecode= [[Media:PlayerExtrasExample.zip]]  
{{KBCS}}
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{{ArticleMetaData
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|id=CS001136
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|platform=S60 3rd Edition
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|devices=Nokia N95
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|category=Symbian C++
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|subcategory=Audio
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|creationdate=October 9, 2008
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|keywords=CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset
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|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
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|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
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|devices= Nokia N95
|devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
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|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
|signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
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|platform= S60 3rd Edition
|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
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|devicecompatability= <!-- Compatible devices (e.g.: All* (must have GPS) ) -->
|author=[[User:Technical writer 1]]
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|signing= <!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
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|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
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|keywords= CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset
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CAPABILITY NONE
 
CAPABILITY NONE
  
LIBRARY   AudioEqualizerUtility.lib   
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LIBRARY AudioEqualizerUtility.lib   
  
 
Header audioequalizerutility.h
 
Header audioequalizerutility.h
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==Test application==
 
==Test application==
  
[[Image:PlayerExtrasExample.zip]]
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[[File:PlayerExtrasExample.zip]]
  
 
== See also==
 
== See also==
  
[[CS001130 - Adding doppler effects to the audio player]]  
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[[Adding doppler effects to the audio player in Symbian C++]]  
  
[[CS001131 - Adding source location effects to the audio player]]  
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[[Adding source location effects to the Symbian C++ audio player]]  
  
[[CS001132 - Adding listener's location effects to the audio player]]  
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[[Adding listener's location effects to the Symbian C++ audio player]]  
  
[[CS001133 - Adding bass boost to the audio player]]  
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[[Adding bass boost to the Symbian C++ audio player]]  
  
[[CS001134 - Adding stereo widening to the audio player]]
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[[Adding stereo widening to the Symbian C++ audio player]]
  
[[CS001135 - Adding reverb to the audio player]]
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[[Adding reverb to the Symbian C++ audio player]]
  
  

Revision as of 04:59, 14 June 2012

Article Metadata
Code ExampleTested with
Devices(s): Nokia N95
CompatibilityArticle
Keywords: CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset
Created: User:Technical writer 1 (09 Oct 2008)
Last edited: hamishwillee (14 Jun 2012)


Contents

Overview

S60 has several audio enhancement APIs that can be used to modify the audio experience. One of them is the CAudioEqualizerUtility API.

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 AudioEqualizerUtility.lib

Header audioequalizerutility.h


Source file

First you need to construct the equalizer instance:

 iAudioEqualizerUtility =
CAudioEqualizerUtility::NewL(*iMdaAudioPlayerUtility);

Use the following code to query equalizer presets:

 TArray<TEfAudioEqualizerUtilityPreset> allPresets = 
iAudioEqualizerUtility->Presets();

Use the following code to apply an equalizer preset:

 iAudioEqualizerUtility->ApplyPresetL(preSetIndex);
// where preSetIndex is 0 to (iAudioEqualizerUtility->Presets().Count() – 1)

Test application

File:PlayerExtrasExample.zip

See also

Adding doppler effects to the audio player in Symbian C++

Adding source location effects to the Symbian C++ audio player

Adding listener's 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

Adding reverb to the Symbian C++ audio player

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