1394 iso recv buffer size integral number of bytes per packet?

Discussion in 'Windows Vista Drivers' started by Volker Moebius, Sep 15, 2003.

  1. Hi all,

    excuse me if resubmitting a known issue. But after scanning this news group as well as some others I
    found some hints confirming that buffers provided for isochronous listening in stream mode must be
    sized of integral number of 1394 packet size. And unfortunately my own tests endorse this
    assumption.

    I found no statements referring to this in DDK documentation nor in 1394 OHCI spec.

    Can anybody acknowledge (or rebut) this issue please?

    Is there an easy way to receive a 1394 multi packet frame not integral number of packet size sized?
    Possibly by providing two buffers meeting the above requirement together one receiving the user data
    the other gathering the junk trailer?

    Thanks
    Volker
     
    Volker Moebius, Sep 15, 2003
    #1
    1. Advertisements

  2. Volker Moebius

    Raj Guest

    found some hints confirming that buffers provided for isochronous listening >in stream mode must be
    I observed in Win2000, the byte number should be multiple of 4.
    Need not be integral number of packet size.
     
    Raj, Sep 15, 2003
    #2
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.