[MPlayer-dev-eng] DMA or not DMA

[Stephen Webb]

> The only real issue i see is, that during a DMA transfere,
> MPlayer has either to sleep until the buffer is coppied or
> that the codec has to use a copy of the buffer to work on.
> Both options are not very exciting.

I'm jumping in this conversation late, so I maybe don't understand the
problem, but...

Is it possible to "double buffer" this memory -- that is, have two target
pieces of memory -- the one that is being DMA transferred/accessed, and
the one that is currently being decoded.  (in the same way that OpenGL
provides a read and write (front/back) buffer).  

-Steve