Remarks
Creates a view of the waveform (in form of a BMP file) for the sound loaded inside the given player: the view can represent the full sound's waveform or portions of it.
Before calling this method it's mandatory performing a previous sound's analysis through a call to the Waveform.AnalyzeFullSound method and waiting its completion through the WaveAnalysisDone event.
For further details about generating a waveform bitmap of the loaded sound, before starting its playback, refer to the How to obtain the sound's waveform tutorial.
Syntax
[Visual Basic]
control.Waveform.CreateFileBitmapView (
nPlayer as Integer,
nStartPos as Integer,
nEndPos as Integer,
nBitmapWidth as Integer,
nBitmapHeight as Integer,
nWaveformType as enumWaveformTypes,
strPathname as String
) as enumErrorCodes
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[C++]
short control.Waveform.CreateFileBitmapView (
short nPlayer,
long nStartPos,
long nEndPos,
long nBitmapWidth,
long nBitmapHeight,
short nWaveformType,
LPCTSTR strPathname
);
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Parameter
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Description
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nPlayer
|
Number representing the zero-based index of the player that will use the Waveform
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nStartPos
|
Number representing the sound's position, expressed in milliseconds, where the waveform visualization begins.
The value 0 represents the sound's beginning.
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nEndPos
|
Number representing the sound's position, expressed in milliseconds, where the waveform visualization ends.
The value -1 represents the sound's end.
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nBitmapWidth
|
Number representing the generated bitmap width, expressed in pixels. A value of -1 indicates no width constraints: in this case the control will generate a bitmap large enough in order to contain the full sound's waveform.
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nBitmapHeight
|
Number representing the generated bitmap height, expressed in pixels.
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nWaveformType
|
The type of rendered waveform, related to the sound's channels.
Supported values are the following:
Mnemonic value
|
Value
|
Meaning
|
WAVEFORM_TYPE_LEFT
|
0
|
The bitmap contains sound data for the left channel
|
WAVEFORM_TYPE_RIGHT
|
1
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The bitmap contains sound data for the right channel
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WAVEFORM_TYPE_MIXED
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2
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The bitmap contains sound data for left and right mixed channels
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strPathname
|
String containing the absolute pathname of the BMP file where the waveform will be saved.
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Return value
Value
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Meaning
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Negative value
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An error occurred (see the LastError property for further error details)
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enumErrorCodes.NOERROR (0)
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The method call was successful
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