[FFmpeg-devel] [PATCH] exr: piz decompression

Reimar Döffinger Reimar.Doeffinger at gmx.de
Thu Oct 10 02:05:44 CEST 2013

On 09.10.2013, at 15:22, Paul B Mahol <onemda at gmail.com> wrote:
> On 8/11/13, Reimar Doeffinger <Reimar.Doeffinger at gmx.de> wrote:
>> On Sun, Aug 11, 2013 at 04:23:54PM +0200, Piotr Bandurski wrote:
>>> Hi,
>>>>> Signed-off-by: Paul B Mahol <onemda at gmail.com>
>>>> ---
>>>> libavcodec/exr.c | 477
>>>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>>> 1 file changed, 477 insertions(+)
>>>> diff --git a/libavcodec/exr.c b/libavcodec/exr.c
>>>> index 7e9e68c..a65e6ba 100644
>>>> --- a/libavcodec/exr.c
>>>> +++ b/libavcodec/exr.c
>>> What is the status of this patch?
>> I suspect it is kind of waiting for someone to figure out if this
>> is rather ordinary huffman/VLC coding as I guessed and thus should
>> be using the functions we have for that instead of reimplementing it
>> or if I'm completely off...
> I will apply this unless someone shows this really can be used by existing code.

What needs to be shown? The generic vlc code should handle basically any kind of variable length code to symbol conversion.
I think that is what the code does, though I don't fully understand it - assuming you understand the code that should answer whether it can be used?
Whether the huffman code could be reused is more tricky, and I don't really care about it, it just might have been one way to make more clear what kind of concepts this codec uses and how it differs from how it is done commonly.

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