[FFmpeg-devel] [PATCH] swscale: Make sws_alloc_set_opts() public

Michael Niedermayer michael at niedermayer.cc
Sun Aug 9 13:12:34 CEST 2015

On Sat, Aug 08, 2015 at 07:45:23PM +0200, wm4 wrote:
> On Sat, 8 Aug 2015 19:05:39 +0200
> Michael Niedermayer <michael at niedermayer.cc> wrote:
> > > Where are the
> > > input and output colorspaces and ranges set?
> > 
> > they would be set with sws_setColorspaceDetails()
> But they're pretty important, so why aren't they part of the parameter
> list too? In the end, the parameter list would grow too long. Or it
> would be kind of inconsistent. (Maybe convenience functions like e.g.
> "sws_set_input_size()" would be helpful without being terribly
> unorthogonal.)
> > > There's my very old patch, which made libswscale transparently set the
> > > parameters of an input AVFrame. This would actually be the simplest API.
> > 
> > can you update the patch so the comments raised by stefano are taken
> > care of ?
> My main worry about this is that if new fields are added to AVFrame,
> the new libswscale API would have to pick them up and adjust the scaler
> settings accordingly. So if the user was setting this option manually,
> a change to libswscale setting this option automatically from AVFrame
> would break the user code.

> Distinguish between set and unset options might help here.

yes, and most fields have a "not set" value,

so that should not be a problem

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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