GetSoundFFTData: Difference between revisions

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__NOTOC__  
__NOTOC__  
{{Client function}}
{{Client function}}
This function gets the fast fourier transform data for an audio stream which is a table of floats representing the current audio frame.
This function gets the fast fourier transform generates a table of all the frequencies of the current audio frame which starts at the bass end of the spectrum to mids to highs in that order
This allows things like visualisations.
This allows things like visualisations.
a fast fourier transform generates a table of all the frequencies of the current audio frame which starts at the bass end of the spectrum to mids to highs in that order
Should you have any problems there is an example resource located on the resource svn here:
[https://code.google.com/p/mtasa-resources/source/browse/#svn%2Ftrunk%2F%5Bgameplay%5D%2FVisualiser Visualiser]
just type "startmusic mystreamurl" in your console and it will play on the cinema billboard near A51
If the element is a player, this function will use the players voice.


==Syntax==  
==Syntax==  
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===Returns===
===Returns===
Returns a table of '''iSamples'''/2 (or '''iBands''' if '''iBands''' is used) floats representing the current audio frame.
Returns a table of '''iSamples'''/2 (or '''iBands'''-1 if '''iBands''' is used) floats representing the current audio frame.
Returns false if the sound is not playing yet or hasn't buffered in the
Returns false if the sound is not playing yet or hasn't buffered in the
case of streams.
case of streams.

Revision as of 09:25, 10 July 2018

This function gets the fast fourier transform generates a table of all the frequencies of the current audio frame which starts at the bass end of the spectrum to mids to highs in that order This allows things like visualisations.

Syntax

table getSoundFFTData ( element sound, int iSamples [, int iBands = 0 ] )

OOP Syntax Help! I don't understand this!

Method: sound:getFFTData(...)


Required Arguments

  • sound: a sound element that is created using playSound or playSound3D. Streams are also supported
  • iSamples: allowed samples are 256, 512, 1024, 2048, 4096, 8192 and 16384.

Optional Arguments

  • iBands: post processing option allows you to split the samples into the desired amount of bands or bars so if you only need 5 bars this saves a lot of cpu power compared to trying to do it in Lua.

Returns

Returns a table of iSamples/2 (or iBands-1 if iBands is used) floats representing the current audio frame. Returns false if the sound is not playing yet or hasn't buffered in the case of streams.

Example

Click to collapse [-]
Client
soundHandler = playSound ( "sound.wav" )

function onSoundPlayRender ( )
    if ( soundHandler ) then
        local soundFFT = getSoundFFTData ( soundHandler, 2048, 256 )
	if ( soundFFT ) then
            for i = 0, 255 do -- Data starts from index 0
                dxDrawRectangle ( 0, i, 1, math.sqrt ( soundFFT[i] ) * 256 )
            end
        end
    end
end
addEventHandler ( "onClientRender", getRootElement(), onSoundPlayRender )

Changelog

Version Description
1.3.2 Added player element to use a players voice

See Also

Retrieved from "https://wiki.multitheftauto.com/wiki/GetSoundFFTData?oldid=55809"