[FFmpeg-devel] [PATCH] libavfilter/af_ambisonic.c Added File for Ambisonic Filter

[Sanchit Sinha]

Thanks Andy for the valuable info! It would be good to talk and learn from
these guys, especially for an amateur like me. :)

On Sat, Mar 11, 2017 at 4:23 PM, Andy Furniss <adf.lists at gmail.com> wrote:

> Paul B Mahol wrote:
>
>> On 3/11/17, Andy Furniss <adf.lists at gmail.com> wrote:
>>
>>> Sanchit Sinha wrote:
>>>
>>>> libavfilter/af_ambisonic.c | 139
>>>>
>>>
>>> +        w=(float *)(*(in->extended_data)+itr);
>>>> +        x=(float *)(*(in->extended_data+1)+itr);
>>>> +        y=(float *)(*(in->extended_data+2)+itr);
>>>> +
>>>> +        *lf = root8 * (2*(*w)+*x+*y);
>>>> +        *lb = root8 * (2*(*w)-*x+*y);
>>>> +        *rb = root8 * (2*(*w)-*x-*y);
>>>> +        *rf = root8 * (2*(*w)+*x-*y);
>>>>
>>>
>>> Seems a bit misleading to call something ambisonic if all it will
>>> do is 2d, so partial b-format to (square?) 4 channel.
>>>
>>> Why not be more specific in the name so the limitation is clear.
>>>
>>
>> This is just for qualification task. Later filter willl be extended.
>>
>> It will not be applied as is in tree.
>>
>
> Ahh, OK.
>
> A complicated subject.
>
> Sanchit, in case you don't know, some of the people who were around at
> the birth of ambisonics, plus ambdec author can be found on the list -
>
> https://mail.music.vt.edu/mailman/listinfo/sursound
>
>
>
>
>
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-- 
Sanchit Sinha
B.Tech- CSE
IIIT-Delhi
Roll-2015083