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TagsReader.FLAC_PictureFrameMemoryFileGet method |
  
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TagsReader.FLAC_PictureFrameMemoryFileGet method |
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Remarks
Obtains a copy in memory of the picture file stored inside a FLAC picture frame.
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 FLAC_PictureFrameMemoryFileGet ( nIndex as Int32, pBuffer() as Byte, nBufferLength as Int32 ) as enumErrorCodes |
[C#] public string FLAC_PictureFrameMemoryFileGet ( Int32 nIndex, byte[] pBuffer, Int32 nBufferLength ); |
[C++] public: string FLAC_PictureFrameMemoryFileGet ( Int32 nIndex, unsigned char __gc[] pBuffer, Int32 nBufferLength ); |
Parameter |
Description |
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nIndex |
Zero-based index of the picture frame. The total number of picture frames available inside the FLAC tag can be obtained through a call to the TagsReader.FLAC_PictureFrameCountGet method. |
pBuffer |
Output buffer that, on return from the method call, will contain the picture file data |
nBufferLength |
Length of the buffer 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
...
}
