BASS.NET API for the Un4seen BASS Audio LibraryBassWmaBASS_WMA_EncodeOpenNetworkMulti Method BASS.NET API for the Un4seen BASS Audio Library
Initializes WMA encoding to the network, using multiple bitrates.

Namespace: Un4seen.Bass.AddOn.Wma
Assembly: Bass.Net (in Bass.Net.dll) Version: 2.4.12.0
Syntax

[DllImportAttribute("basswma.dll", CharSet = CharSet.Auto)]
public static int BASS_WMA_EncodeOpenNetworkMulti(
	int freq,
	int chans,
	BASSWMAEncode flags,
	int[] bitrates,
	int port,
	int clients
)

Parameters

freq
Type: SystemInt32
The sample rate in Hz, or a BASS channel handle if the BASS_WMA_ENCODE_SOURCE flag is specified.
chans
Type: SystemInt32
The number of channels (1=mono, 2=stereo, etc.).
flags
Type: Un4seen.Bass.AddOn.WmaBASSWMAEncode
Any combination of these flags (see BASSWMAEncode):
BASS_SAMPLE_8BITS8-bit sample data. If neither this or the BASS_SAMPLE_FLOAT flags are specified, then 16-bit data is expected.
BASS_SAMPLE_FLOAT32-bit floating-point sample data.
BASS_WMA_ENCODE_STANDARDUse standard WMA encoding. If neither this or the BASS_WMA_ENCODE_PRO flag is specified, then either codec could be used (whichever supports the requested sample format and bitrate).
BASS_WMA_ENCODE_PROUse WMA Professional encoding.
BASS_WMA_ENCODE_PCMWrite uncompressed PCM data in an ASF container. bitrate is ignored except that it should be non-0.
BASS_WMA_ENCODE_24BITEncode in 24-bit, else 16-bit. 24-bit encoding requires WMA Pro.
BASS_WMA_ENCODE_SCRIPTEnable the specification of tags mid-stream (after encoding has begun).
BASS_WMA_ENCODE_SOURCEUse the BASS channel with the handle in freq as the encoder's source. The chansparameter is ignored, as are the BASS_SAMPLE_8BITS and BASS_SAMPLE_FLOAT flags. If the BASSenc add-on is loaded, then the BASS_CONFIG_ENCODE_PRIORITY setting is used to determine where in the channel's DSP chain the encoding is performed, otherwise priority -1000 is used.
bitrates
Type: SystemInt32
Array of encoding bitrates (in bits per second, e.g. 128000) to use, terminated with a 0 element (so the number of elements in the array must be one more than the effective bitrates used).
port
Type: SystemInt32
The port number for clients to conenct to... 0 = let the system choose a port.
clients
Type: SystemInt32
The maximum number of clients (up to 50) that can be connected.

Return Value

Type: Int32
If succesful, the new encoder's handle is returned, else is returned. Use BASS_ErrorGetCode to get the error code.
Remarks

This function is identical to BASS_WMA_EncodeOpenNetwork(Int32, Int32, BASSWMAEncode, Int32, Int32, Int32), but with the additional ability to specify multiple bitrates.

When encoding/broadcasting in multiple bitrates, the user will automatically get the best available bitrate for their bandwidth.

The WMA codec expects 16-bit or 24-bit sample data depending on the BASS_WMA_ENCODE_24BIT flag, but BASSWMA will accept 8-bit, 16-bit or floating-point data, and convert it to the appropriate format. Use BASS_WMA_EncodeGetRates(Int32, Int32, BASSWMAEncode) to retrieve a list of the encoding bitrates available for a specific sample format. VBR encoding is not recommended for network encoding.

ERROR CODEDescription
BASS_ERROR_WMAThe Windows Media modules (v9 or above) are not installed.
BASS_ERROR_ILLPARAMclients is invalid.
BASS_ERROR_NOTAVAILNo codec could be found to support the specified sample format and bitrate.
BASS_ERROR_UNKNOWNSome other mystery problem!

Examples

Initialize encoding 44100hz 16-bit stereo sample data at 128kb/s and 64kb/s, using port 4711, and allowing up to 5 clients.
VB
Dim bitrates As Integer() = {128000, 64000, 0} ' the bitrates
Dim encoder As Integer = BassWma.BASS_WMA_EncodeOpenNetworkMulti(44100, 2, 
                                 BASSWMAEncode.BASS_WMA_ENCODE_DEFAULT, bitrates, 4711, 5)
int[] bitrates = {128000, 64000, 0}; // the bitrates
int encoder = BassWma.BASS_WMA_EncodeOpenNetworkMulti( 44100, 2, 
                      BASSWMAEncode.BASS_WMA_ENCODE_DEFAULT, bitrates, 4711, 5);
See Also

Reference