shithub: libvpx

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vp9-screen-content: Adjust condition for large search area

Account for dropped frame, and change resolution threshold
for limiting split below 16x16.

Change-Id: If94cfb2bc24d9103332d1c8d945daca8899db33d

--- a/vp9/encoder/vp9_encodeframe.c

+++ b/vp9/encoder/vp9_encodeframe.c

@@ -1381,7 +1381,7 @@

       if (cpi->oxcf.content == VP9E_CONTENT_SCREEN &&

           cpi->svc.spatial_layer_id == 0 &&

           cpi->rc.high_num_blocks_with_motion && !x->zero_temp_sad_source &&

-          cm->width >= 1280 && cm->height >= 720) {

+          cm->width > 640 && cm->height > 480) {

         // Disable split below 16x16 block size when scroll motion is detected.

         // TODO(marpan/jianj): Improve this condition: issue is that search

         // range is hard-coded/limited in vp9_int_pro_motion_estimation() so

--- a/vp9/encoder/vp9_speed_features.c

+++ b/vp9/encoder/vp9_speed_features.c

@@ -794,10 +794,12 @@

     sf->partition_search_type = FIXED_PARTITION;

     sf->always_this_block_size = BLOCK_64X64;

   }

-  // Special case for screen content: increase motion search when high motion

-  // is detected.

+  // Special case for screen content: increase motion search on baase spatial

+  // layer when high motion is detected or previous SL0 frame was dropped.

+  // Avoid speed 5 for as there is an issue with SVC datarate test.

   if (cpi->oxcf.content == VP9E_CONTENT_SCREEN && cpi->oxcf.speed > 5 &&

-      cpi->rc.high_num_blocks_with_motion && cpi->svc.spatial_layer_id == 0) {

+      cpi->svc.spatial_layer_id == 0 &&

+      (cpi->rc.high_num_blocks_with_motion || cpi->svc.last_layer_dropped[0])) {

     sf->mv.search_method = NSTEP;

     sf->mv.fullpel_search_step_param = 2;

   }