Commit 7139d2ba for libheif

commit 7139d2ba980d97c45ab9a7b80ef2c98328ec2606
Author: Dinika Saxena <dinika@greyllama.cc>
Date:   Mon Feb 2 18:46:13 2026 +0100

    Fix: Set dav1d thread count before opening decoder

    The num_threads setting was being applied after dav1d_open(),
    which meant the thread configuration was ignored. Moving the
    thread count assignment to occur before opening the decoder
    so that the setting takes effect.

diff --git a/libheif/plugins/decoder_dav1d.cc b/libheif/plugins/decoder_dav1d.cc
index 38f82b95..8502f1c5 100644
--- a/libheif/plugins/decoder_dav1d.cc
+++ b/libheif/plugins/decoder_dav1d.cc
@@ -108,15 +108,15 @@ heif_error dav1d_new_decoder2(void** dec, const heif_decoder_plugin_options* opt

   decoder->settings.all_layers = 0;

+  if (options->num_threads) {
+    decoder->settings.n_threads = options->num_threads;
+  }
+
   if (dav1d_open(&decoder->context, &decoder->settings) != 0) {
     delete decoder;
     return {heif_error_Decoder_plugin_error, heif_suberror_Unspecified, kSuccess};
   }

-  if (options->num_threads) {
-    decoder->settings.n_threads = options->num_threads;
-  }
-
   *dec = decoder;

   return heif_error_ok;