[flac-dev] A couple of questions about channel mapping

[Martin Leese]

lvqcl wrote:

> If a decoder may not have access to STREAMINFO block then
> it also cannot read VORBIS_COMMENT block, so it cannot read
> WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag and will decode
> a FLAC stream using the default (incorrect) channel assignment.
> So the files that have non-default channel assignment are probably
> not Subset compatible.
> IMHO it's necessary at least to warn a user about it.

This restriction, with the word "probably"
omitted, should be added to the list in the spec
at:
    https://xiph.org/flac/format.html#subset

The FLAC Subset section also tends to get lost.
It would help if it was promoted to a separate
section with the heading "FLAC Subset" (on a
par with "Format", "Residual Coding", etc).

Regards,
Martin
-- 
Martin J Leese
E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/