[...] > The bottom level packets are sent at fixed time intervals (obviously, > corresponding to the frame clock of the bus), but these packets are tiny > and you get millions of them per second. A useful packet of audio data > will be made up of a bunch of these. > > According to the mLAN spec you need a buffer of around ~250us (depending > on format) to collate the packets.
Still there is no guarantee that 10 packets always have exactly the same number of samples. You say the mLAN spec says you need a buffer of around ~250us. Note that is doesn't say a buffer of a number of frames. The bottom line is these packets are sent at regular time intervals, not at a fixed number of frames and thus JACK should support this by allowing non-const (frames) callbacks IMHO. --ms
