BassBASS_ChannelGetLength Method (Int32, BASSMode)

[DllImportAttribute("bass")]
public static long BASS_ChannelGetLength(
	int handle,
	BASSMode mode
)

<DllImportAttribute("bass">]
Public Shared Function BASS_ChannelGetLength ( 
	handle As Integer,
	mode As BASSMode
) As Long

Parameters

handle

Type: SystemInt32
The channel handle... a HCHANNEL, HMUSIC, HSTREAM. HSAMPLE handles may also be used.

mode

Type: Un4seen.BassBASSMode
How to retrieve the length (one of the BASSMode flags):

BASS_POS_BYTE	Get the length in bytes.
BASS_POS_MUSIC_ORDER	Get the length in orders. (HMUSIC only).
BASS_POS_OGG	Get the number of bitstreams in an OGG file.

Other modes may be supported by add-ons, see the documentation.

Return Value

The exact length of a stream will be returned once the whole file has been streamed, but until then it is not always possible to 100% accurately estimate the length. The length is always exact for MP3/MP2/MP1 files when the BASS_STREAM_PRESCAN flag is used in the BASS_StreamCreateFile(String, Int64, Int64, BASSFlag) call, otherwise it is an (usually accurate) estimation based on the file size. The length returned for OGG files will usually be exact (assuming the file is not corrupt), but when streaming from the internet (or "buffered" user file), it can be a very rough estimation until the whole file has been downloaded. It will also be an estimate for chained OGG files that are not pre-scanned.

Unless an OGG file contains a single bitstream, the number of bitstreams it contains will only be available if it was pre-scanned at the stream's creation.

Retrieving the length of a MOD music requires that the BASS_MUSIC_PRESCAN flag was used in the BASS_MusicLoad(String, Int64, Int32, BASSFlag, Int32) call.

// length in bytes
long len = Bass.BASS_ChannelGetLength(channel, BASSMode.BASS_POS_BYTE);
// the time length
double time = Bass.BASS_ChannelBytes2Seconds(channel, len);

' length in bytes
Dim len As Long = Bass.BASS_ChannelGetLength(channel, BASSMode.BASS_POS_BYTE)
' the time length
Dim time As Double = Bass.BASS_ChannelBytes2Seconds(channel, len)

Reference