[Flac-dev] En/decoding 32bit Integer Formats

[Josh Coalson]

--- taktik <taktik at renoise.com> wrote:
> Hi,
> 
> What exactly is the reason why libFlac and/or the FLAC command-line  
> en/decoder currently doesn't support 32bit integer samples?
> 
> The comment in "FLAC/format.h" -> of  
> FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE notes that
> the FLAC format supports 32bit, but the reference en/decoders  
> currently do not. Does
> this mean that libFlac or just the commandline tool is limited to 24 
> bit?
> 
> We would love to use FLAC as a total replacement for WAV files in our
>  
> product (in exported song
> and instrument content), but really need to have 32bit support, as  
> our internal sample format
> is 32 bit.
> I already hackily tried to change  
> FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE to 32u and ran
> some tests using libFlac. All seemed to work well, so this limitation
> is maybe (no longer?)
> needed?

if this works for you, then you are lucky!  the missing parts
are 32-bit handling in flac itself (parsing PCM samples), and
tuning for 32-bit in libFLAC.  otherwise the current libFLAC
should handle 32-bit but I don't have any good material to
tune against.

Josh


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