[FFmpeg-devel] [PATCH] avfilter: add hqx filter (hq2x, hq3x, hq4x)

[Paul B Mahol]

On 6/17/14, Clement Boesch <u at pkh.me> wrote:
> Partially fixes Ticket #3404 (xbr filter remaining)
> ---
> We can probably make more meaningful versions of hq[234]x_interp* but I
> believe
> that's already a huge improvement over the original code.
>
> [~/src/hqx/hqx-read-only/src]* wc -l src/*.[ch]
>    141 src/common.h
>   2809 src/hq2x.c
>   3787 src/hq3x.c
>   5241 src/hq4x.c
>    138 src/hqx.c
>     55 src/hqx.h
>     38 src/init.c
>  12209 total
>
> [~/src/ffmpeg]* wc -l libavfilter/vf_hqx.c
> 557 libavfilter/vf_hqx.c
>
> Note1: the filter is bitexact for the reference implementation, except for
> filter/pixelart1.png where the reference code hits this bug:
> https://code.google.com/p/hqx/issues/detail?id=8
> ---
>  Changelog                   |   1 +
>  MAINTAINERS                 |   1 +
>  doc/filters.texi            |  14 ++
>  libavfilter/Makefile        |   1 +
>  libavfilter/allfilters.c    |   1 +
>  libavfilter/version.h       |   2 +-
>  libavfilter/vf_hqx.c        | 557
> ++++++++++++++++++++++++++++++++++++++++++++
>  tests/fate/filter-video.mak |   7 +
>  tests/ref/fate/filter-hq2x  |   3 +
>  tests/ref/fate/filter-hq3x  |   3 +
>  tests/ref/fate/filter-hq4x  |   3 +
>  11 files changed, 592 insertions(+), 1 deletion(-)
>  create mode 100644 libavfilter/vf_hqx.c
>  create mode 100644 tests/ref/fate/filter-hq2x
>  create mode 100644 tests/ref/fate/filter-hq3x
>  create mode 100644 tests/ref/fate/filter-hq4x
>

...

probably ok