[FFmpeg-devel] [PATCH] adpcm: Store trellis nodes in a heap structure

Martin Storsjö martin
Wed Nov 10 21:58:12 CET 2010

On Wed, 10 Nov 2010, Reimar D?ffinger wrote:

> On Wed, Nov 10, 2010 at 11:42:48AM +0200, Martin Storsj? wrote:
> > So, another argument for patch #4 is that even if it theoretically should 
> > give worse results (which it for some reason doesn't, in these tests), it 
> > speeds up the encoding so much that you can use a larger trellis size, 
> > giving even better results.
> That argument would be a bit more convincing to me if it was possible to
> set the trellis size larger than 8, the 22 seconds it takes after the patch
> are hardly insane :-).

You actually can set the trellis parameter up to 16, making it really 
insanely slow. Set to 12, it's about 13 times slower than realtime - I 
don't even want to think about how slow it would be at the higher levels 

// Martin

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