[FFmpeg-devel] [PATCH 02/10] lavfi: support unknown channel layouts.

Nicolas George nicolas.george at normalesup.org
Mon Dec 31 01:26:21 CET 2012

Le decadi 10 nivôse, an CCXXI, Stefano Sabatini a écrit :
> What I mean: adding a specific field 
> all_channel_layouts
> to mean that all channel layouts are supported, and a field:
> all_channel_counts
> to mean that all channel counts (and layouts) are supported.
> This should provide a more consistent semantic, and remove the
> arbitrary mapping:
> empty list -> all channel layout
> { CH_LAYOUT_UNKNOWN } -> all channel layout and counts
> which looks rather arbitrary to me. My supposition is that such fields
> would make the code simpler/more readable.

Ah, I see. That may be true, I will have to try to write it that way.
Unfortunately, it does not avoid the AV_CH_LAYOUT_UNKNOWN constant, for
filters that want to specify they accept 2 channels, whatever layout. Other
data structures could be possible, but nothing as simple as a flag.


  Nicolas George
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