diff options
| -rw-r--r-- | doc/filters.texi | 5 | ||||
| -rw-r--r-- | libavfilter/vf_xmedian.c | 18 |
2 files changed, 13 insertions, 10 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 6e2dedaf0e..67bafdc7d2 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -18465,9 +18465,10 @@ Pick median pixels from several input videos. The filter accept the following options: @table @option -@item nb_inputs -Set number of inputs. This must be odd number. +@item inputs +Set number of inputs. Default is 3. Allowed range is from 3 to 255. +If number of inputs is even number, than result will be mean value between two median values. @item planes Set which planes to filter. Default value is @code{15}, by which all planes are processed. diff --git a/libavfilter/vf_xmedian.c b/libavfilter/vf_xmedian.c index ae61e18098..672b3a7e78 100644 --- a/libavfilter/vf_xmedian.c +++ b/libavfilter/vf_xmedian.c @@ -88,10 +88,6 @@ static av_cold int init(AVFilterContext *ctx) XMedianContext *s = ctx->priv; int ret; - if (!(s->nb_inputs & 1)) - av_log(s, AV_LOG_WARNING, "nb_intputs: %d is not odd number.\n", s->nb_inputs); - - s->nb_inputs = s->nb_inputs | 1; s->radius = s->nb_inputs / 2; s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames)); if (!s->frames) @@ -156,7 +152,10 @@ static int median_frames16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jo } AV_QSORT(values, nb_inputs, int, comparei); - dst[x] = values[radius]; + if (radius & 1) + dst[x] = values[radius]; + else + dst[x] = (values[radius] + values[radius - 1]) >> 1; } dst += out->linesize[p] / 2; @@ -195,7 +194,10 @@ static int median_frames8(AVFilterContext *ctx, void *arg, int jobnr, int nb_job values[i] = in[i]->data[p][y * in[i]->linesize[p] + x]; AV_QSORT(values, nb_inputs, int, comparei); - dst[x] = values[radius]; + if (radius & 1) + dst[x] = values[radius]; + else + dst[x] = (values[radius] + values[radius - 1]) >> 1; } dst += out->linesize[p]; @@ -319,8 +321,8 @@ static int activate(AVFilterContext *ctx) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM static const AVOption xmedian_options[] = { - { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS }, - { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags = FLAGS }, + { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS }, + { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags = FLAGS }, { NULL }, }; |