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    SubjectRe: 2.5.74-mm1
    On Tue, 8 Jul 2003, Daniel Phillips wrote:

    > On Tuesday 08 July 2003 00:03, Davide Libenzi wrote:
    > > > > Try to play with SNDCTL_DSP_SETFRAGMENT. Last time I checked the kernel
    > > > > let you set a dma buf for 0.5 up to 1 sec of play (upper limited by
    > > > > 64Kb). Feeding the sound card with 4Kb writes will make you skip after
    > > > > about 50ms CPU blackout at 44KHz 16 bit. RealPlayer uses 16Kb feeding
    > > > > chunks that makes it able to sustain up to 200ms of blackout.
    > > >
    > > > That's just fiddling, it doesn't deal with the basic problem. Anyway,
    > > > big buffers have their own annoyances. Have you tried the graphic
    > > > equalizer in xmms lately? A one second lag on slider adjustment is not
    > > > nice.
    > >
    > > That's not fiddling. It is tuning your app so that it won't require
    > > realtime when it is not needed.
    >
    > But realtime is needed, because there is a deadline for each buffer-fill.

    Yes, in theory it is needed since you have to meet a deadline. But if
    you program you timings such that your deadline is 400-500ms it is really
    hard to lose it against one of 50-100ms.


    - Davide

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