[FFmpeg-devel] patch for failing on WavPack DSD files

[David Bryant]

On 11/21/18 9:50 PM, David Bryant wrote:
> On 11/20/18 10:58 PM, Peter Ross wrote:
>> On Tue, Nov 20, 2018 at 09:23:03PM -0800, David Bryant wrote:
>>> Hi,
>>>
>>> Was made aware of this problem on Kodi:
>>>
>>> https://github.com/xbmc/xbmc/issues/14771
>>>
>>> I'm going to try to add full WavPack DSD support, but thought in the meantime it would be a good idea to detect and error out early.
>>>
>>> Thanks!
>> cool. is this dst-based, or your own algorithm?
>>
>> -- Peter
>> (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
>>
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> This is my own algorithm. Actually there are two: one is a byte-based algorithm that is very fast and the other is bit-based
> (like DST) that is slower but compresses better (and still uses less CPU than DST). If I had to make a rough estimation of the
> average compression ratios, it would be about 0.6 for the fast mode, 0.5 for the high mode, and 0.4 for DST.
>
> -David
>
>
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Hi. Is there anything else I can provide to help this along?

The behavior of FFmpeg encountering WavPack DSD files without this patch is pretty ugly...

-David