From f86ad8b36d75417f872723eba1c3a2ffc19c9c70 Mon Sep 17 00:00:00 2001
From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Date: Thu, 29 Jan 2026 23:26:20 +0100
Subject: [PATCH] Patch libavif for svt-av1 4.0 compatibility

---
 depends/install_libavif.sh |  4 ++++
 depends/libavif-svt4.patch | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 depends/libavif-svt4.patch

diff --git a/depends/install_libavif.sh b/depends/install_libavif.sh
index 50ba01755..a6686f3ef 100755
--- a/depends/install_libavif.sh
+++ b/depends/install_libavif.sh
@@ -7,6 +7,10 @@ version=1.3.0
 
 pushd libavif-$version
 
+# Apply patch for SVT-AV1 4.0 compatibility
+# Pending release of https://github.com/AOMediaCodec/libavif/pull/2971
+patch -p1 < ../libavif-svt4.patch
+
 if [ $(uname) == "Darwin" ] && [ -x "$(command -v brew)" ]; then
     PREFIX=$(brew --prefix)
 else
diff --git a/depends/libavif-svt4.patch b/depends/libavif-svt4.patch
new file mode 100644
index 000000000..7abfc5299
--- /dev/null
+++ b/depends/libavif-svt4.patch
@@ -0,0 +1,14 @@
+--- a/src/codec_svt.c
++++ b/src/codec_svt.c
+@@ -162,7 +162,11 @@ static avifResult svtCodecEncodeImage(avifEncoder * encoder,
+ #else
+         svt_config->logical_processors = encoder->maxThreads;
+ #endif
++#if SVT_AV1_CHECK_VERSION(4, 0, 0)
++        svt_config->aq_mode = 2;
++#else
+         svt_config->enable_adaptive_quantization = 2;
++#endif
+         // disable 2-pass
+ #if SVT_AV1_CHECK_VERSION(0, 9, 0)
+         svt_config->rc_stats_buffer = (SvtAv1FixedBuf) { NULL, 0 };