ZPlay::SetFFTGraphParam Method

Set and change parameters of FFT graph.

C++

virtual __stdcall int SetFFTGraphParam(TFFTGraphParamID nParamID, int nValue) = 0;

Parameters

Parameters	Description
TFFTGraphParamID nParamID	FFT graph parameter identifier. Specify parameter you need to set or change.
int nValue	Parameter value. This value depends on parameter identifier. Read more info about valid values for specific parameter identifier.

Return Values

Return Values	Description
1	All OK.
0	Error. To get error message read here.

Remarks

By default, FFT graph is using 512 FFT points, 257 harmonics, Blackman-Harris window, logarithmic frequency distribution, line type, 25% transparency.

zplay_GetFFTGraphParam, zplay_DrawFFTGraphOnHWND, zplay_DrawFFTGraphOnHDC

Example

ZPlay C++ Class interface

// set horizontal scale to logarithmic
instance->SetFFTGraphParam(gpHorizontalScale, gsLogarithmic);

// set FFT points to 256
instance->SetFFTGraphParam(gpFFTPoints, 256);

// set graph type to bars, left channel on top
instance->SetFFTGraphParam(gpGraphType, gtBarsLeftOnTop);

C Style interface

// set horizontal scale to logarithmic
zplay_SetFFTGraphParam(instance, gpHorizontalScale, gsLogarithmic);

// set FFT points to 256
zplay_SetFFTGraphParam(instance, gpFFTPoints, 256);

// set graph type to bars, left channel on top
zplay_SetFFTGraphParam(instance, gpGraphType, gtBarsLeftOnTop);

Group

ZPlay Methods

Web: http://libzplay.sourceforge.net/

Email: zcindori@inet.hr

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