[FFmpeg-devel] Masked LZ Decompression

Umair Khan omerjerk at gmail.com
Sun May 22 19:16:09 CEST 2016

On Fri, May 20, 2016 at 11:53 PM, Paul B Mahol <onemda at gmail.com> wrote:
> On 5/20/16, Umair Khan <omerjerk at gmail.com> wrote:
>> Hi,
>> I'm working on implementing floating point support in the ALS decoder.
>> In this I've to use masked LZ decompression. I've written the code for
>> myself for masked lz decompression using the help from the reference
>> software.
>> Although, I'm not yet sure if an implementation of masked LZ is
>> already there in FFmpeg or not.
>> If it is already there, it makes no sense to have my own implementation as
>> well.
>> So anybody has any idea if we have masked LZ implementation already or not ?
> IMHO we do not. Because its audio related.

Hi Paul,

Any idea about this https://ffmpeg.org/doxygen/2.8/lzw_8c.html ?
This looks like the encoder part - https://ffmpeg.org/doxygen/2.8/lzwenc_8c.html

I'm not sure how masked LZ is different from LZW. There's almost zero
information available on internet about masked lz.
Also, there's a research paper available here -
Any way if we can get this ?


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