[FFmpeg-devel] [PATCH] increase MAX_AUDIO_FRAMESIZE

[Sascha Sommer]

Hi,

On Mittwoch, 2. September 2009, Michael Niedermayer wrote:
> On Wed, Sep 02, 2009 at 08:03:02PM +0300, Kostya wrote:
> > On Wed, Sep 02, 2009 at 07:00:32PM +0200, Sascha Sommer wrote:
> > > Hi,
> > >
> > > attached patch increases the maximum audio framesizes. This makes it
> > > possible to play a few more wmapro files.
> >
> > And WavPack too :)
> >
> > > Regards
> > >
> > > Sascha
> >
> > I wonder how long we will increase that buffer before someone proposes
> > better buffer allocation system.
>
> i wonder if the decoders could maybe output smaller chunks?
> its better memory wise, better cache wise and also improves
> AV sync buffering requirements
>

I wonder if it would help if the decode function could output smaller chunks 
and set some flag so that it gets called again with the same AVPacket?
What I want to avoid is to copy either the decoded or the nondecoded data into 
some large temporary buffer. For wmapro I think it would be the best if 
decoding is stopped after one "frame". This would require 8 * 4096 
sizeof(float) bytes for an 8 channel stream as output buffer. At this point 
only a part of the input buffer is consumed. Therefore it would be nice to 
have the same AVPacket again without reinitializing get_bits etc. 
What are the requirements for WavPack?

Regards

Sascha