[NUT-devel] [PATCH] docs/nut4cc: Add floating point rawvideo support

[Michael Niedermayer]

On Tue, Feb 09, 2016 at 07:20:31PM +0100, Paul B Mahol wrote:
> On 2/9/16, Michael Niedermayer <michael at niedermayer.cc> wrote:
> > Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> > ---
> >  docs/nut4cc.txt |    3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/docs/nut4cc.txt b/docs/nut4cc.txt
> > index c2c067a..8235367 100644
> > --- a/docs/nut4cc.txt
> > +++ b/docs/nut4cc.txt
> > @@ -160,6 +160,7 @@ values for the UV planes, that is the amount to shift
> > the luma
> >  width/height right to find the chroma width/height.
> >
> >  The fourth byte is the number of bits used (8, 16, ...).
> > +33 implies 32bit IEEE floats (33 is used to leave 32 for integers)
> >
> >  If the order of bytes is inverted, that means that each component has
> >  to be read big-endian.
> > @@ -176,6 +177,7 @@ Y3[10][16]  Planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample
> > per 2x1 Y samples), littl
> >  Y3[00][16]  Planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples),
> > little-endian [NOT in AVI]
> >  [16][00]3Y  Planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples),
> > big-endian    [NOT in AVI]
> >  Y4[11][ 8]  Planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A
> > samples)            [NOT in AVI]
> > +Y3[00][33]  Planar YUV 4:4:4, 96bpp, (1 Cr & Cb sample per 1x1 Y samples),
> > little-endian floats [NOT in AVI]
> >  Y2[00][ 8]  8bit gray, 8bit alpha [NOT in AVI]
> >  G3[00][ 8]  Planar GBR, 24bpp [NOT in AVI]
> >  G3[00][ 9]  Planar GBR, 27bpp, 7 unused MSB per 16bit value, little-endian
> > [NOT in AVI]
> > @@ -188,6 +190,7 @@ G3[00][14]  Planar GBR, 42bpp, 2 unused MSB per 16bit
> > value, little-endian [NOT
> >  [14][00]3G  Planar GBR, 42bpp, 2 unused MSB per 16bit value, big-endian
> > [NOT in AVI]
> >  G3[00][16]  Planar GBR, 48bpp, little-endian [NOT in AVI]
> >  [16][00]3G  Planar GBR, 48bpp, big-endian    [NOT in AVI]
> > +[33][00]3G  Planar GBR, 96bpp, big-endian floats [NOT in AVI]
> 
> Why is this one big-endian?

because thats how the planar rawvideo formats distinguish LE/BE
its an example, write the fourcc backward and its the other
endianness


> 
> Having this supported in swscale would make me happy.
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-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Avoid a single point of failure, be that a person or equipment.
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