From: Attila Tóth
From: Myckel Habets <gentoo-bugs@habets-dobben.nl>

https://bugs.gentoo.org/835828

With version 1.0.0 media-libs/dav1d made some changes to the Dav1dSettings struct.
This patch takes care that both API versions are supported.

diff -urN seamonkey-2.53.11.orig/dom/media/platforms/agnostic/DAV1DDecoder.cpp seamonkey-2.53.11/dom/media/platforms/agnostic/DAV1DDecoder.cpp
--- seamonkey-2.53.11.orig/dom/media/platforms/agnostic/DAV1DDecoder.cpp	2021-10-26 18:49:54.000000000 +0200
+++ seamonkey-2.53.11/dom/media/platforms/agnostic/DAV1DDecoder.cpp	2022-03-23 09:31:22.390704959 +0100
@@ -7,6 +7,7 @@
 #include "DAV1DDecoder.h"
 
 #include "nsThreadUtils.h"
+#include "dav1d/version.h"
 
 #undef LOG
 #define LOG(arg, ...)                                                  \
@@ -29,13 +30,16 @@
   } else if (mInfo.mDisplay.width >= 1024) {
     decoder_threads = 4;
   }
-  settings.n_frame_threads =
-      static_cast<int>(std::min(decoder_threads, GetNumberOfProcessors()));
+#if DAV1D_API_VERSION_MAJOR >= 6
+  settings.n_threads = static_cast<int>(std::min(decoder_threads, GetNumberOfProcessors()));
+#else
+  settings.n_frame_threads = static_cast<int>(std::min(decoder_threads, GetNumberOfProcessors()));
   // There is not much improvement with more than 2 tile threads at least with
   // the content being currently served. The ideal number of tile thread would
   // much the tile count of the content. Maybe dav1d can help to do that in the
   // future.
   settings.n_tile_threads = 2;
+#endif
 
   int res = dav1d_open(&mContext, &settings);
   if (res < 0) {