[FFmpeg-devel] [PATCH] avfilter: Add blue and violet noise generation filters

Paul B Mahol onemda at gmail.com
Wed Jul 19 13:59:13 EEST 2017

On 7/19/17, george at spotify.com <george at spotify.com> wrote:
> From: George Boyle <george at spotify.com>
> For the blue and violet noise, I took the pink and brown noise
> respectively and subtracted the offsets instead of adding them. When I
> eyeball the frequency spectrum of the resulting outputs it looks correct
> to me, i.e. the blue graph appears to be a mirror image of the pink, and
> the same can be said of the violet and the brown. I did not do anything
> else to confirm the correctness.
> ---
>  doc/filters.texi             |  4 ++--
>  libavfilter/asrc_anoisesrc.c | 41 +++++++++++++++++++++++++++++++++++------
>  2 files changed, 37 insertions(+), 8 deletions(-)


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