commit 4b50c28108554b1eb3ca68b530d1ec77ca5f2571
author Mudassir Galaganath <mudassir.galaganath@ittiam.com> Thu Nov 02 16:34:38 2023 +0530
committer James Zern <jzern@google.com> Tue Nov 07 22:56:16 2023 +0000
tree 4b3e0aef9c0151f7f9a3a539e2eb5b9d5c8eabc6
parent de5a5acc513b10ef4015ca8286e6ef0ede114ddd

Add early termination checks to skip global motion

This CL adds early termination checks in
av1_compute_global_motion_facade() to skip redundant
computations when the speed feature 'gm_search_type' is set
to 'GM_DISABLE_SEARCH' or when the total number of valid
ref frames is zero.

Change-Id: Ice7e71aa3f94ede25b76999c14a8bebdffaf397f

av1/encoder/global_motion_facade.c

diff --git a/av1/encoder/global_motion_facade.c b/av1/encoder/global_motion_facade.c
index 48b1dbf..02a4e70 100644
--- a/av1/encoder/global_motion_facade.c
+++ b/av1/encoder/global_motion_facade.c
@@ -431,15 +431,19 @@
   }
 
   if (cpi->common.current_frame.frame_type == INTER_FRAME && cpi->source &&
-      cpi->oxcf.tool_cfg.enable_global_motion && !gm_info->search_done) {
+      cpi->oxcf.tool_cfg.enable_global_motion && !gm_info->search_done &&
+      cpi->sf.gm_sf.gm_search_type != GM_DISABLE_SEARCH) {
     setup_global_motion_info_params(cpi);
-    gm_alloc_data(cpi, &cpi->td.gm_data);
-    if (cpi->mt_info.num_workers > 1)
-      av1_global_motion_estimation_mt(cpi);
-    else
-      global_motion_estimation(cpi);
-    gm_dealloc_data(&cpi->td.gm_data);
-    gm_info->search_done = 1;
+    // Terminate early if the total number of reference frames is zero.
+    if (cpi->gm_info.num_ref_frames[0] || cpi->gm_info.num_ref_frames[1]) {
+      gm_alloc_data(cpi, &cpi->td.gm_data);
+      if (cpi->mt_info.num_workers > 1)
+        av1_global_motion_estimation_mt(cpi);
+      else
+        global_motion_estimation(cpi);
+      gm_dealloc_data(&cpi->td.gm_data);
+      gm_info->search_done = 1;
+    }
   }
   memcpy(cm->cur_frame->global_motion, cm->global_motion,
          sizeof(cm->cur_frame->global_motion));