Hi On Sat, Nov 30, 2024 at 03:27:53PM +0100, Niklas Haas wrote: > On Sat, 30 Nov 2024 15:23:50 +0100 Niklas Haas <ffm...@haasn.xyz> wrote: > > From: Niklas Haas <g...@haasn.dev> > > > > The existing av_csp_trc_func_from_id() mostly implements the OETF, except > > for > > PQ. As such, we are currently missing a precise definition of an ITU-R EOTF. > > Introduce the new functions av_csp_itu_eotf() and av_csp_itu_eotf_inv(), to > > fill > > this void. Note that this is not possible in all cases, e.g. AVCOL_TRC_LOG > > which > > has no corresponding EOTF definition in any ITU-R standard. > > > > Note that we cannot implement the proper HLG and SMPTE 428 OOTFs without > > access > > to all three color channels, because they are not independent per channel. > > As a > > result, we need to define a new type to encapsulate a color triplet. I have > > tentatively named this AVColor, in the hopes that it will become useful in > > other > > contexts as well. The choice of an array rather than explicitly named > > fields is > > to greatly simplify per-channel processing, matrix multiplications, and the > > like. > > Forgot to update the commit message. I decided to nuke AVColor in favor of > passing a double[3] directly. It only makes the code inside the test framework > marginally less pretty, and actually improves the usability of the API in > other > contexts IMO. > > > --- > > doc/APIchanges | 4 + > > libavutil/csp.c | 205 ++++++++++++++++++++++++++++++++++++++++++++ > > libavutil/csp.h | 33 +++++++ > > libavutil/version.h | 2 +- > > 4 files changed, 243 insertions(+), 1 deletion(-) > > > > diff --git a/doc/APIchanges b/doc/APIchanges > > index db72121a61..12a2165837 100644 > > --- a/doc/APIchanges > > +++ b/doc/APIchanges > > @@ -2,6 +2,10 @@ The last version increases of all libraries were on > > 2024-03-07 > > > > API changes, most recent first: > > > > +2024-11-25 - xxxxxxxxxx - lavu 59.49.100 - csp.h > > + Add struct AVColor, type av_csp_eotf_function, av_csp_itu_eotf() and
This still talks about AVColor thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Some people wanted to paint the bikeshed green, some blue and some pink. People argued and fought, when they finally agreed, only rust was left.
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