shithub: libvpx

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Minor tweak to implicit segmentation experiment.

This minor tweak makes segment 0 neutral and used by
key frames and also extends beyond 4 segments.

Change-Id: Ife4744602aba66ac9432746db3113cc5cd88a482

--- a/vp9/common/vp9_seg_common.c

+++ b/vp9/common/vp9_seg_common.c

@@ -99,7 +99,7 @@

     mi = mi_ptr;

     // Experimental use of tx size to define implicit segmentation

     for (col = 0; col < cm->mb_cols; ++col, ++mi) {

-      map_ptr[col] = mi->mbmi.txfm_size;

+      map_ptr[col] = 1 + mi->mbmi.txfm_size;

     }

     mi_ptr += cm->mode_info_stride;

     map_ptr += cm->mb_cols;

--- a/vp9/encoder/vp9_onyx_if.c

+++ b/vp9/encoder/vp9_onyx_if.c

@@ -534,8 +534,8 @@

     xd->update_mb_segmentation_data = 1;

-    // Enable use of q deltas on segments

-    for (i = 0; i < MAX_MB_SEGMENTS; ++i) {

+    // Enable use of q deltas on segments 1 and up

+    for (i = 1; i < MAX_MB_SEGMENTS; ++i) {

       qi_delta = compute_qdelta(cpi, cpi->active_worst_quality, q_target);

       vp9_set_segdata(xd, i, SEG_LVL_ALT_Q, qi_delta);

       q_target *= 0.95;

-- 

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