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TagsReader.WAV_BextChunkBinaryFieldGet method |
  
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TagsReader.WAV_BextChunkBinaryFieldGet method |
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Remarks
Obtains a copy in memory of a binary field stored inside the WAV Bext chunk.
For further details about methods related to tags reading refer to the TagsReaderMan class.
For details about the reading of tags see the How to read TAG information in sound files tutorial.
Syntax
[Visual Basic] Public Function WAV_BextChunkBinaryFieldGet ( nFieldId as enumBextChunkBinaryField, pBuffer() as Byte, ByRef nBufferLength as Int32 ) as enumErrorCodes |
[C#] public string WAV_BextChunkBinaryFieldGet ( enumBextChunkBinaryField nFieldId, byte[] pBuffer, ref Int32 nBufferLength ); |
[C++] public: string WAV_BextChunkBinaryFieldGet ( enumBextChunkBinaryField nFieldId, unsigned char __gc[] pBuffer, Int32 __gc *nBufferLength ); |
Parameter |
Description |
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nFieldId |
Identifier of the binary field to read. Supported values are the following:
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pBuffer |
Output buffer that, on return from the method call, will contain binary data of the requested field. |
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nBufferLength |
Reference that represents the maximum allowed size of the buffer (in input) and, on return from the method call, will contain the effective size of the buffer read; the value is expressed in bytes. |
Return value
Value |
Meaning |
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Negative value |
An error occurred (see the LastError property for further error details) |
enumErrorCodes.NOERROR (0) |
The method call was successful. |
Below you can find a couple of samples that demonstrate how to retrieve a picture and store it inside a memory buffer in Visual Basic.NET and Visual C#:
Visual Basic.NET
Private Sub buttonGetPicture_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles buttonGetPicture.Click
{
' get the size of the picture in bytes
Dim nSizeInBytes As Int32
AudioSoundEditor1.TagsReader.FLAC_PictureFrameSizeGet (0, nSizeInBytes)
if nSizeInBytes = 0 then Exit Sub
' allocate the receiving buffer
Dim byteBuffer As Byte() = Nothing
byteBuffer = New Byte(nSizeInBytes)
' read picture data
AudioSoundEditor1.TagsReader.FLAC_PictureFrameMemoryFileGet (0, byteBuffer, nSizeInBytes)
...
use the buffer
...
}
Visual C#
private void buttonGetPicture_Click(object sender, System.EventArgs e)
{
// get the size of the picture in bytes
Int32 nSizeInBytes = 0;
AudioSoundEditor1.TagsReader.FLAC_PictureFrameSizeGet (0, ref nSizeInBytes);
if (nSizeInBytes == 0)
return;
// allocate the receiving buffer
byte[] byteBuffer = new byte[nSizeInBytes];
// read picture data
AudioSoundEditor1.TagsReader.FLAC_PictureFrameMemoryFileGet (0, byteBuffer, nSizeInBytes);
...
use the buffer
...
}
