[FFmpeg-cvslog] avfilter/vf_zscale: export approximate gamma option and enable it by default

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun Nov 27 11:43:54 2016 +0100| [4719e563a4237adb5bf83119bba46b61c2e40ceb] | committer: Paul B Mahol

avfilter/vf_zscale: export approximate gamma option and enable it by default

Signed-off-by: Paul B Mahol <onemda at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4719e563a4237adb5bf83119bba46b61c2e40ceb
---

 libavfilter/vf_zscale.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
index 122ca33..1675278 100644
--- a/libavfilter/vf_zscale.c
+++ b/libavfilter/vf_zscale.c
@@ -97,6 +97,7 @@ typedef struct ZScaleContext {
     int chromal_in;
     char *size_str;
     double nominal_peak_luminance;
+    int approximate_gamma;
 
     char *w_expr;               ///< width  expression string
     char *h_expr;               ///< height expression string
@@ -480,6 +481,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
         s->params.resample_filter = s->filter;
         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->src_format.width = in->width;
         s->src_format.height = in->height;
@@ -762,6 +764,7 @@ static const AVOption zscale_options[] = {
     { "chromalin",  "set input chroma location", OFFSET(chromal_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" },
     { "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 },
     { NULL }
 };