[FFmpeg-devel] [PATCH] MLP/TrueHD decoder
Mon Oct 15 22:01:12 CEST 2007
On Mon, Oct 15, 2007 at 06:58:42PM +0100, Ian Caulfield wrote:
> On 15/10/2007, Michael Niedermayer <michaelni at gmx.at> wrote:
> > On Mon, Oct 15, 2007 at 05:11:23PM +0100, Ian Caulfield wrote:
> > > On 15/10/2007, Michael Niedermayer <michaelni at gmx.at> wrote:
> > > > Hi
> > > >
> > > > On Mon, Oct 15, 2007 at 12:42:25PM +0100, Ian Caulfield wrote:
> > > > >
> > > > > Is it possible to use av_crc on fractional bytes?
> > > >
> > > > is the area over which the crc is calculated not a multiple of 8bits ?
> > >
> > > Not in this case - this header is usually 125 or 149 bits long, and
> > > doesn't start on a byte boundary.
> > just "filling" the first bits which arent part of the header with 0 should
> > work as long as the end is on a byte boundary
> I don't think the end is on a byte boundary either...
well if its just fields of the header then maybe the code could be
simplified (without a table) does that affect speed of the whole codec
meassureably? i think the table wouldnt be in the cache anyway and
the cache misses for each header would kill the gain from the table...
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
I wish the Xiph folks would stop pretending they've got something they
do not. Somehow I fear this will remain a wish. -- M?ns Rullg?rd
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