Vorbis dev - Sep 2002 - Skipping with vorbisfile playback using DirectSo und

Sounds like either your machine is too slow or you have some other buffer
issue.  A decode thread is usually ideal so that data can be decoded before
it is needed by the buffer fill operation.  You might be able to get a
sasifactory solution by increasing the number of buffers and using them in a
round-robin fashion 1-2-3-4-1-2-3-4.  Wouldn't do any more than 1/4 sec per
buffer.

Cheers,
Chris

-----Original Message-----
From: Borut Pfeifer [mailto:borut@whiteknucklegames.com]
Sent: Tuesday, September 10, 2002 4:57 PM
To: vorbis-dev@xiph.org
Subject: [vorbis-dev] Skipping with vorbisfile playback using
DirectSound

<p>I'm having a problem trying to write a simple vorbis file player
using
DirectSound. The decoding portion is pretty much straight from the
vorbisfile sample code.  The pcm data gets put into one half of a
DirectSound buffer, and as that half is playing, the next half gets filled.
The problem is, there's skipping and some noise when the file is being
played (although some of the music is audible). Could this this caused by
the time spent decoding? Wav files work fine so I'm fairly certain it's
not
the playback code itself. I've tried decoding various amounts at one time
but in each case the same thing occurs (although to different degrees).  Is
there something I can do to fix this without adding a separate decoding
thread (or is that going to be necessary)? Or could it be something else?

Thanks,
  Borut

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Well, my machine is a P4 1.4 gHz, Creative SB live sound card, so I'm
doubting it's my machine (that, and ogg & mp3's play just fine in
other
applications).  Using multiple buffers and dividing a single buffer into
sections *should* behave the same (you'd think, anyway).  Right now it's
looking like I'll try implementing the decoding in another thread and cross
my fingers that I won't run into any multithreading issues later (when this
code is integrated into a larger project). :)

    Borut

----- Original Message -----
From: "Chris Parsons" <chris@courtsmart.com>
To: <vorbis-dev@xiph.org>
Sent: Tuesday, September 10, 2002 5:02 PM
Subject: RE: [vorbis-dev] Skipping with vorbisfile playback using
DirectSound

<p>> Sounds like either your machine is too slow or you have some other
buffer
> issue.  A decode thread is usually ideal so that data can be decoded
before
> it is needed by the buffer fill operation.  You might be able to get a
> sasifactory solution by increasing the number of buffers and using them in
a
> round-robin fashion 1-2-3-4-1-2-3-4.  Wouldn't do any more than 1/4 sec
per
> buffer.
>
> Cheers,
> Chris
>
> -----Original Message-----
> From: Borut Pfeifer [mailto:borut@whiteknucklegames.com]
> Sent: Tuesday, September 10, 2002 4:57 PM
> To: vorbis-dev@xiph.org
> Subject: [vorbis-dev] Skipping with vorbisfile playback using
> DirectSound
>
>
> I'm having a problem trying to write a simple vorbis file player using
> DirectSound. The decoding portion is pretty much straight from the
> vorbisfile sample code.  The pcm data gets put into one half of a
> DirectSound buffer, and as that half is playing, the next half gets
filled.
> The problem is, there's skipping and some noise when the file is being
> played (although some of the music is audible). Could this this caused by
> the time spent decoding? Wav files work fine so I'm fairly certain
it's
not
> the playback code itself. I've tried decoding various amounts at one
time
> but in each case the same thing occurs (although to different degrees).
Is
> there something I can do to fix this without adding a separate decoding
> thread (or is that going to be necessary)? Or could it be something else?
>
> Thanks,
>   Borut
>
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to
> 'vorbis-dev-request@xiph.org'
> containing only the word 'unsubscribe' in the body.  No subject is
needed.
> Unsubscribe messages sent to the list will be ignored/filtered.
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to
'vorbis-dev-request@xiph.org'
> containing only the word 'unsubscribe' in the body.  No subject is
needed.
> Unsubscribe messages sent to the list will be ignored/filtered.
>
--- >8 ----
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