On Wed, Feb 25, 2015 at 02:55:58PM +0000, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> doc/filters.texi | 34 ++++++
> libavfilter/Makefile | 2 +
> libavfilter/allfilters.c | 2 +
> libavfilter/vf_neighbor.c | 289
> ++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 327 insertions(+)
> create mode 100644 libavfilter/vf_neighbor.c
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index baef346..13ba797 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -3728,6 +3728,23 @@ FFmpeg was configured with @code{--enable-opencl}.
> Default value is 0.
>
> @end table
>
> +@section dilation
> +
> +Apply dilation effect to the video.
> +
> +This filter replaces the pixel by the local(3x3) maximum.
> +
> +It accepts the following parameters:
> +
> +@table @option
> +@item threshold
> +Allows to limit the maximum change, default is 65535.
> +
> +@item coordinates
> +Flag which specifies the pixel to refer to. Default is 255 ie. all eight
> +pixels are used.
> +@end table
> +
> @section drawbox
>
> Draw a colored box on the input image.
> @@ -4437,6 +4454,23 @@ value.
>
> @end table
>
> +@section erosion
> +
> +Apply erosion effect to the video.
> +
> +This filter replaces the pixel by the local(3x3) minimum.
> +
> +It accepts the following parameters:
> +
> +@table @option
> +@item threshold
> +Allows to limit the maximum change, default is 65535.
> +
> +@item coordinates
> +Flag which specifies the pixel to refer to. Default is 255 ie. all eight
> +pixels are used.
> +@end table
> +
[...]
> +static int config_input(AVFilterLink *inlink)
> +{
> + EDContext *s = inlink->dst->priv;
> + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
> + int ret;
> +
> + if ((ret = av_image_fill_linesizes(s->linesize, inlink->format,
> inlink->w)) < 0)
> + return ret;
> +
> + s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h,
> desc->log2_chroma_h);
> + s->planeheight[0] = s->planeheight[3] = inlink->h;
> +
> + s->nb_planes = av_pix_fmt_count_planes(inlink->format);
> + s->buffer = av_malloc(3 * (s->linesize[0] + 32));
av_malloc_array() relevant?
> + if (!s->buffer)
> + return AVERROR(ENOMEM);
> +
> + return 0;
> +}
> +
> +static inline void line_copy8(uint8_t *line, const uint8_t *srcp, int width,
> int mergin)
> +{
> + memcpy(line, srcp, width);
> +
> + for (int i = mergin; i > 0; i--) {
int should be declared out of the scope
> + line[-i] = line[i];
> + line[width - 1 + i] = line[width - 1 - i];
> + }
> +}
> +
[...]
No other comment from me. May I ask if there was a special use case of
this or that's just because the effect were neat and simple to implement?
--
Clément B.
pgp55nEF6uOeE.pgp
Description: PGP signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
