0001-Disable-updates-works-for-intra-only.patch

From 4df2282b7c8aafb849ed62ba612434ab98dc03eb Mon Sep 17 00:00:00 2001
From: anonymous
Date: Tue, 23 Mar 2021 17:12:00 +0100
Subject: [PATCH] Disable updates (works for intra only)

---
 .gitignore                  |  4 ++++
 vp9/encoder/vp9_bitstream.c | 11 ++++++++---
 vp9/encoder/vp9_subexp.c    |  5 +++--
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/.gitignore b/.gitignore
index 5f2683538..fc8af961b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -67,3 +67,7 @@
 /vpxenc
 /vpxenc.dox
 TAGS
+
+libvpx-build
+*.yuv
+.vscode/*
diff --git a/vp9/encoder/vp9_bitstream.c b/vp9/encoder/vp9_bitstream.c
index 3eff4ce83..d587fcfb2 100644
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -585,6 +585,8 @@ static void update_coef_probs_common(vpx_writer *const bc, VP9_COMP *cpi,
       }
 
       // printf("Update %d %d, savings %d\n", update[0], update[1], savings);
+      // NOTE: we disable updates
+      savings = -1;
       /* Is coef updated at all */
       if (update[1] == 0 || savings < 0) {
         vpx_write_bit(bc, 0);
@@ -628,7 +630,8 @@ static void update_coef_probs_common(vpx_writer *const bc, VP9_COMP *cpi,
       int updates = 0;
       int noupdates_before_first = 0;
       assert(cpi->sf.use_fast_coef_updates == ONE_LOOP_REDUCED);
-      for (i = 0; i < PLANE_TYPES; ++i) {
+      // NOTE: we disable updates
+      /* for (i = 0; i < PLANE_TYPES; ++i) {
         for (j = 0; j < REF_TYPES; ++j) {
           for (k = 0; k < COEF_BANDS; ++k) {
             for (l = 0; l < BAND_COEFF_CONTEXTS(k); ++l) {
@@ -663,7 +666,7 @@ static void update_coef_probs_common(vpx_writer *const bc, VP9_COMP *cpi,
                 }
                 vpx_write(bc, u, upd);
                 if (u) {
-                  /* send/use new probability */
+                  // send/use new probability
                   vp9_write_prob_diff_update(bc, newp, *oldp);
                   *oldp = newp;
                 }
@@ -671,7 +674,9 @@ static void update_coef_probs_common(vpx_writer *const bc, VP9_COMP *cpi,
             }
           }
         }
-      }
+      }*/
+      // NOTE: we disable updates
+      updates = 0;
       if (updates == 0) {
         vpx_write_bit(bc, 0);  // no updates
       }
diff --git a/vp9/encoder/vp9_subexp.c b/vp9/encoder/vp9_subexp.c
index 19bbd5373..fcff2b107 100644
--- a/vp9/encoder/vp9_subexp.c
+++ b/vp9/encoder/vp9_subexp.c
@@ -182,9 +182,10 @@ void vp9_cond_prob_diff_update(vpx_writer *w, vpx_prob *oldp,
                                const unsigned int ct[2]) {
   const vpx_prob upd = DIFF_UPDATE_PROB;
   vpx_prob newp = get_binary_prob(ct[0], ct[1]);
-  const int savings =
-      vp9_prob_diff_update_savings_search(ct, *oldp, &newp, upd);
+  /* const int savings = */
+  /*     vp9_prob_diff_update_savings_search(ct, *oldp, &newp, upd); */
   assert(newp >= 1);
+  const int savings = 0;
   if (savings > 0) {
     vpx_write(w, 1, upd);
     vp9_write_prob_diff_update(w, newp, *oldp);
-- 
2.35.1.windows.2