diff options
| -rw-r--r-- | doc/filters.texi | 7 | ||||
| -rw-r--r-- | libavfilter/vf_zscale.c | 7 |
2 files changed, 14 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 50aa0eb305..152e806fdd 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -22393,6 +22393,13 @@ Possible values are: @item npl Set the nominal peak luminance. + +@item param_a +Parameter A for scaling filters. Parameter "b" for bicubic, and the number of +filter taps for lanczos. + +@item param_b +Parameter B for scaling filters. Parameter "c" for bicubic. @end table The values of the @option{w} and @option{h} options are expressions diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c index 57199a0878..c18a161ab4 100644 --- a/libavfilter/vf_zscale.c +++ b/libavfilter/vf_zscale.c @@ -101,6 +101,8 @@ typedef struct ZScaleContext { char *size_str; double nominal_peak_luminance; int approximate_gamma; + double param_a; + double param_b; char *w_expr; ///< width expression string char *h_expr; ///< height expression string @@ -601,6 +603,8 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) s->params.resample_filter_uv = s->filter; s->params.nominal_peak_luminance = s->nominal_peak_luminance; s->params.allow_approximate_gamma = s->approximate_gamma; + s->params.filter_param_a = s->params.filter_param_a_uv = s->param_a; + s->params.filter_param_b = s->params.filter_param_b_uv = s->param_b; format_init(&s->src_format, in, desc, s->colorspace_in, s->primaries_in, s->trc_in, s->range_in, s->chromal_in); @@ -897,6 +901,9 @@ static const AVOption zscale_options[] = { { "cin", "set input chroma location", OFFSET(chromal_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" }, { "npl", "set nominal peak luminance", OFFSET(nominal_peak_luminance), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, 0, DBL_MAX, FLAGS }, { "agamma", "allow approximate gamma", OFFSET(approximate_gamma), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS }, + { "param_a", "parameter A, which is parameter \"b\" for bicubic, " + "and the number of filter taps for lanczos", OFFSET(param_a), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, -DBL_MAX, DBL_MAX, FLAGS }, + { "param_b", "parameter B, which is parameter \"c\" for bicubic", OFFSET(param_b), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, -DBL_MAX, DBL_MAX, FLAGS }, { NULL } }; |