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[dts350z]

I have working code for playing back data I'm streaming with both regular and ASIO devices.

However, when I use  BASS_ChannelGetData(chan, NULL,BASS_DATA_AVAILABLE) with ASIO devices I get 4294967295 returned instead of something like 270336 (which get with a non ASIO device).

4294967295 is 32 bits of all ones.

This is a 6 channel stream, loaded via BASS_StreamPutData. I'm on windows 7.

[Ian @ un4seen]

The BASS_DATA_AVAILABLE option retrieves the amount of data in the playback buffer, so it doesn't apply to a "decoding channel" (as you would use with ASIO output) and your request will fail (4294967295 = 0xFFFFFFFF = -1). To get the total amount of buffered data, you should also check the BASS_StreamPutData return value, like this...

DWORD buffered=BASS_StreamPutData(handle, NULL, 0); // get the amount of queued data
DWORD playbuf=BASS_ChannelGetData(handle, NULL, BASS_DATA_AVAILABLE); // attempt to get the amount in the playback buffer
if (playbuf!=(DWORD)-1) buffered+=playbuf; // if successful, add it to the queued amount