From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Mon, 25 Sep 2023 18:55:59 -0700
Subject: VP8: disallow thread count changes

Currently allocations are done at encoder creation time. Going from
threaded to non-threaded would cause a crash.

Bug: chromium:1486441
Change-Id: Ie301c2a70847dff2f0daae408fbef1e4d42e73d4

diff --git a/vp8/encoder/onyx_if.c b/vp8/encoder/onyx_if.c
index 94fb6e256e8f4f1077aa6e2aef84e3bc7070da0f..f68339d2b4f4b2ca654a835cc56c537fb5e7d260 100644
--- a/vp8/encoder/onyx_if.c
+++ b/vp8/encoder/onyx_if.c
@@ -1443,6 +1443,11 @@ void vp8_change_config(VP8_COMP *cpi, VP8_CONFIG *oxcf) {
   last_h = cpi->oxcf.Height;
   prev_number_of_layers = cpi->oxcf.number_of_layers;
 
+  if (cpi->initial_width) {
+    // TODO(https://crbug.com/1486441): Allow changing thread counts; the
+    // allocation is done once in vp8_create_compressor().
+    oxcf->multi_threaded = cpi->oxcf.multi_threaded;
+  }
   cpi->oxcf = *oxcf;
 
   switch (cpi->oxcf.Mode) {
