From 5b5c4147d3f9c18f4ab2b36a1fbec1596f5415fe Mon Sep 17 00:00:00 2001
From: Sebastien Cote <sebas642@gmail.com>
Date: Fri, 22 Nov 2024 11:31:18 -0700
Subject: [PATCH] vtenc: add support for the HLG color transfer

Fixes #4047

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7947>
---
 subprojects/gst-plugins-bad/sys/applemedia/vtenc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/subprojects/gst-plugins-bad/sys/applemedia/vtenc.c b/subprojects/gst-plugins-bad/sys/applemedia/vtenc.c
index 3571ef4d9b..ccc1a4db67 100644
--- a/subprojects/gst-plugins-bad/sys/applemedia/vtenc.c
+++ b/subprojects/gst-plugins-bad/sys/applemedia/vtenc.c
@@ -1378,6 +1378,14 @@ gst_vtenc_set_colorimetry (GstVTEnc * self, VTCompressionSessionRef session)
         GST_WARNING_OBJECT (self, "macOS version is too old, the SMPTE2084 "
             "transfer function is not available");
       break;
+    case GST_VIDEO_TRANSFER_ARIB_STD_B67:
+      if (__builtin_available (macOS 10.13, *))
+        transfer = kCVImageBufferTransferFunction_ITU_R_2100_HLG;
+      else
+        GST_WARNING_OBJECT (self,
+            "macOS version is too old, the ITU-R BT.2100-1 "
+            "transfer function is not available");
+      break;
     default:
       GST_WARNING_OBJECT (self, "Unsupported color transfer %u", cm.transfer);
   }