[FFmpeg-devel] [WIP] select filter

[Stefano Sabatini]

On date Sunday 2011-05-22 01:14:01 +0200, Stefano Sabatini encoded:
> On date Saturday 2011-05-21 14:20:20 +0200, Michael Niedermayer encoded:
> > On Fri, May 20, 2011 at 10:17:32AM +0200, Stefano Sabatini wrote:
> > > Please comment on design and syntax, depends on patches:
> > >     vsrc_buffer: return an error code if no frames are available
> > >     ffmpeg: handle the case when get_filtered_frame() fails
> > > 
> > > Missing documentation.
> > > -- 
> > > FFmpeg = Funny Formidable Moronic Puristic Ecumenical Generator
> > 
> > >  Makefile     |    1 
> > >  allfilters.c |    1 
> > >  vf_select.c  |  264 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > >  3 files changed, 266 insertions(+)
> > > df88016805e3ef4a44d3c1bb95bef2a7263e7932  0003-lavfi-add-select-filter.patch
> > > From 08880c08d188aa8c0528f69178716d9ad430bd61 Mon Sep 17 00:00:00 2001
> > > From: Stefano Sabatini <stefano.sabatini-lala at poste.it>
> > > Date: Sat, 7 May 2011 02:06:25 +0200
> > > Subject: [PATCH] lavfi: add select filter
> > 
> > IMO this filter should be commited
> > 
> > also a "skip similar frames" filter would be usefull, and should be
> > able to share quite a bit of code with this
> 
> Extended with an idea which I had today.
> 
> If the source declares it has cached frames, select enables a "cache
> mode", frames are requested and cached in the select filter in case
> they meet the select condition, and immediately returned in
> request_frame().
> 
> This should/can be improved, indeed now it caches only one frames, in
> case poll_frame() declares N frames, request() in cache-mode should be
> called N times, each selected frame should be cached, poll will
> finally return the number of selected cached frames.
> 
> Seems to work fine in my mind simulator, I'll try to extend the idea
> to N frames (which should be rather easy).
> 
> BTW buffer should also be extended to support multiple frames caching.

... and patch.
-- 
FFmpeg = Fast and Fascinating Mastodontic Practical Enchanting Glue
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