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Adding equalizer to the Symbian C++ audio player

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__NOTOC__
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[[Category:Symbian C++]][[Category:Code Examples]][[Category:Multimedia]][[Category:Audio]][[Category:Code Snippet]][[Category:S60 3rd Edition (initial release)]][[Category:S60 3rd Edition FP1]][[Category:S60 3rd Edition FP2]]
__NOEDITSECTION__
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{{Abstract|Symbian has several audio enhancement APIs that can be used to modify the audio experience. One of them is the {{Icode|CAudioEqualizerUtility}} API.}} This snippet can be self-signed.
{{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
+
  
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
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{{ArticleMetaData <!-- v1.2 -->
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|sourcecode= [[Media:PlayerExtrasExample.zip]]
 
|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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|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
 +
|signing= Self-Signed
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|capabilities= None
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|keywords= CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset
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|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
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|translated-by= <!-- [[User:XXXX]] -->
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|translated-from-title= <!-- Title only -->
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|review-by= <!-- After re-review: [[User:username]] -->
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|update-by= <!-- After significant update: [[User:username]]-->
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|update-timestamp= <!-- After significant update: YYYYMMDD -->
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|creationdate= 20081009
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|author= [[User:Technical writer 1]]
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<!-- The following are not in current metadata -->
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|id= CS001136
 
}}
 
}}
 
 
==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==
 
==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:
 
The audio player must be fully constructed before constructing the instance of the API. This can be done with the following lines of code:
 
<code cpp>
 
<code cpp>
  iMdaAudioPlayerUtility =  
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  iMdaAudioPlayerUtility = CMdaAudioPlayerUtility::NewFilePlayerL(aFileName,
  CMdaAudioPlayerUtility::NewFilePlayerL(aFileName,
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                                           *this,
 
                                           *this,
 
                                           EMdaPriorityNormal,
 
                                           EMdaPriorityNormal,
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The following capabilities and libraries are required:
 
The following capabilities and libraries are required:
  
CAPABILITY NONE
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CAPABILITY NONE
 
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LIBRARY AudioEqualizerUtility.lib   
LIBRARY   AudioEqualizerUtility.lib   
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Header audioequalizerutility.h
 
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Header audioequalizerutility.h
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First you need to construct the equalizer instance:
 
First you need to construct the equalizer instance:
 
<code cpp>
 
<code cpp>
  iAudioEqualizerUtility =
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  iAudioEqualizerUtility = CAudioEqualizerUtility::NewL(*iMdaAudioPlayerUtility);
  CAudioEqualizerUtility::NewL(*iMdaAudioPlayerUtility);
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</code>  
 
</code>  
  
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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++]]  
 
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* [[Adding source location effects to the Symbian C++ audio player]]  
[[CS001131 - Adding source location effects to the audio player]]  
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* [[Adding listener's location effects to the Symbian C++ audio player]]  
 
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* [[Adding bass boost to the Symbian C++ audio player]]  
[[CS001132 - Adding listener's location effects to the audio player]]  
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* [[Adding stereo widening to the Symbian C++ audio player]]
 
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* [[Adding reverb to the Symbian C++ audio player]]
[[CS001133 - Adding bass boost to the audio player]]  
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[[CS001134 - Adding stereo widening to the audio player]]
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[[CS001135 - Adding reverb to the audio player]]
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+
 
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[[Category:Symbian C++]]
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[[Category:Code Examples]]
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[[Category:Multimedia]]
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[[Category:Audio]]
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[[Category:Code Snippet]]
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Revision as of 09:42, 3 December 2012

Symbian 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.

Article Metadata
Code ExampleTested with
Devices(s): Nokia N95
CompatibilityPlatform Security
Signing Required: Self-Signed
Capabilities: None
Article
Keywords: CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset
Created: User:Technical writer 1 (09 Oct 2008)
Last edited: hamishwillee (03 Dec 2012)

Contents

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

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