[flac-dev] [PATCH] doc: Add notes about subframe sample size

Dave Rice dave at dericed.com
Sun Jun 11 18:09:40 UTC 2017

Hi Ruud van Asseldonk,

> On Jun 11, 2017, at 7:24 AM, Ruud van Asseldonk <dev at veniogames.com> wrote:
>>> I'm jumping in on this thread to make a few remarks about the spec. I
>>> implemented a FLAC decoder by only looking at the spec, and I have a few
>>> notes that would have saved me a lot of time if the spec had mentioned
>>> them. They are obvious in hindsight, of course.
>>> * If the channel assignment includes a difference channel, then the
>>> subframe for that channel has one extra bit per sample in order to
>>> encode the difference.
>>> * The number of bits per sample for a subframe, is the number of bits
>>> per sample of the frame, minus the number of wasted bits per sample of
>>> the subframe (and possibly plus one for a difference channel).
>>> I hope this helps future implementers.
>> I would love to see a patch against the documentation for this.
>> Erik
> Here you go.
> Kind regards,
> Ruud van Asseldonk
> <0001-doc-Add-notes-about-subframe-sample-size.patch>_______________________________________________

Do you mind to submit this patch as well to cellar at ietf.org <mailto:cellar at ietf.org> (info at https://www.ietf.org/mailman/listinfo/cellar <https://www.ietf.org/mailman/listinfo/cellar>). That working group is currently working on the Flac format documentation in https://github.com/privatezero/flac_markdown <https://github.com/privatezero/flac_markdown> and https://datatracker.ietf.org/wg/cellar/documents/ <https://datatracker.ietf.org/wg/cellar/documents/>.
Dave Rice

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