[FFmpeg-devel] [PATCH] avcodec: libdav1d AV1 decoder wrapper

[James Almer]

On 9/29/2018 9:54 AM, Devin Heitmueller wrote:
> On Sat, Sep 29, 2018 at 6:04 AM Rostislav Pehlivanov
> <atomnuker at gmail.com> wrote:
>> I'd much rather go with the original intent which was to merge the decoder
>> into lavc.
> 
> Ronald can correct me if I'm wrong, but I suspect a key goal behind
> the decoder was to have a standalone library which could be shared
> across a variety of projects (both open and closed source).  Merging
> it in directly will create a maintenance headache as the two source
> trees diverge.  It also makes unit testing more difficult, since
> Ronald/VideoLAN can write unit tests for the library (which will
> presumably be consumed by a number of projects/products) and be
> confident that those same unit tests apply to the version that is used
> by ffmpeg.
> 
> I don't think having libx264/libx265 out of tree hasn't been a
> nightmare for anyone.  I don't think this case would be any different.
> 
> Devin

There's a considerable difference between an encoder and a decoder from
a ffmpeg PoV. For starters, hwaccel hooks, and then threading is instead
handled by the library.