vd: use ST.2086 / HDR10 MaxCLL in addition to mastering metadata

MaxCLL is the more authoritative source for the metadata we are
interested in. The use of mastering metadata is sort of a hack anyway,
since there's no clearly-defined relationship between the mastering peak
brightness and the actual content. (Unlike MaxCLL, which is an explicit
relationship)

Also move the parameter fixing to `fix_image_params`

I don't know if the avutil check is strictly necessary but I've included
it anyway to be on the safe side.

1 files changed, 6 insertions, 0 deletions

diff --git a/wscript b/wscript
index eea216e4a4..7a4ef0d4c9 100644
--- a/wscript
+++ b/wscript
@@ -449,6 +449,12 @@ FFmpeg/Libav libraries. You need at least {0}. Aborting.".format(libav_versions_
         'func': check_statement('libavutil/imgutils.h',
                                 'av_image_copy_uc_from(0,0,0,0,0,0,0)',
                                 use='libav'),
+    }, {
+        'name': 'avutil-content-light-level',
+        'desc': 'libavutil content light level struct',
+        'func': check_statement('libavutil/frame.h',
+                                'AV_FRAME_DATA_CONTENT_LIGHT_LEVEL',
+                                use='libav'),
     },
 ]