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Re: [Gnash-dev] Stuttering Playback due to Blocking Reads
From: |
strk |
Subject: |
Re: [Gnash-dev] Stuttering Playback due to Blocking Reads |
Date: |
Thu, 24 Sep 2009 13:01:02 +0200 |
On Thu, Sep 24, 2009 at 12:54:15PM +0200, Benjamin Wolsey wrote:
>
> > Playback blockage may be due to several reasons, originating from one
> > of these two:
> >
> > 1) buffer is below the user-specified trashold
> > 2) gnash main thread itself is blocked
> >
>
> The blockage we are talking about in the bug is of the first type. It's
> caused because various places in the FLV parser make small reads or
> seeks of 1 to 12 bytes for various reasons, and this calls a read that
> blocks media parsing (or something) until the next segment of data is
> received. It's a design flaw in the parser, which really should get a
> buffer to read and not attempt to seek outside it.
Blocking on those reads shouldn't be a problem unless that thread
is also holding a lock needed by the main thread.
IIRC the lock on the Buffer itself isn't obtained until a full frame
is completely parsed.
Chances are there's a lock on the input stream itself, but can't
remember who else needs it; probably the NetStream.seek() function.
--strk;
Free GIS & Flash consultant/developer () ASCII Ribbon Campaign
http://foo.keybit.net/~strk/services.html /\ Keep it simple!
- [Gnash-dev] Stuttering Playback due to Blocking Reads, Esben Stien, 2009/09/12
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Esben Stien, 2009/09/22
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Benjamin Wolsey, 2009/09/22
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Benjamin Wolsey, 2009/09/24
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Andrea Palmatè, 2009/09/24
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads,
strk <=
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Bastiaan Jacques, 2009/09/24
- Re: [Gnash-dev] Stuttering Playback due to Blocking Reads, Benjamin Wolsey, 2009/09/24