[FFmpeg-cvslog] cbs_av1: Remove constraint on MDCV luminance values

[Mark Thompson]

ffmpeg | branch: master | Mark Thompson <sw at jkqxz.net> | Wed Jan 18 20:30:50 2023 +0000| [aaa49a7a425ce3dc6ca8edc0e17ed16c98f699a6] | committer: Mark Thompson

cbs_av1: Remove constraint on MDCV luminance values

While desiring min to be less than max feels entirely sensible,
unfortunately the standard does not actually have this requirement.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=aaa49a7a425ce3dc6ca8edc0e17ed16c98f699a6
---

 libavcodec/cbs_av1_syntax_template.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/libavcodec/cbs_av1_syntax_template.c b/libavcodec/cbs_av1_syntax_template.c
index d98d3d42de..e95925a493 100644
--- a/libavcodec/cbs_av1_syntax_template.c
+++ b/libavcodec/cbs_av1_syntax_template.c
@@ -1862,11 +1862,8 @@ static int FUNC(metadata_hdr_mdcv)(CodedBitstreamContext *ctx, RWContext *rw,
     fb(16, white_point_chromaticity_x);
     fb(16, white_point_chromaticity_y);
 
-    fc(32, luminance_max, 1, MAX_UINT_BITS(32));
-    // luminance_min must be lower than luminance_max. Convert luminance_max from
-    // 24.8 fixed point to 18.14 fixed point in order to compare them.
-    fc(32, luminance_min, 0, FFMIN(((uint64_t)current->luminance_max << 6) - 1,
-                                   MAX_UINT_BITS(32)));
+    fb(32, luminance_max);
+    fb(32, luminance_min);
 
     return 0;
 }