shithub: libvpx

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vp9: Fix condition to update consec_zero_mv.

Fix will reset the consec_zero_mv map on non-skipped blocks with non-zero mv.
Adjust thresholds on consec_zero_mv in noise estimation and skin detection,
as more possible reset on map means lower thresholds should be used.

Change-Id: Ibe8520057472b3609585260b51b6f95a38fb777d

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

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

@@ -4295,8 +4295,7 @@

   for (y = 0; y < ymis; y++)

     for (x = 0; x < xmis; x++) {

       int map_offset = block_index + y * cm->mi_cols + x;

-      if (is_inter_block(mi) && mi->skip &&

-          mi->segment_id <= CR_SEGMENT_ID_BOOST2) {

+      if (is_inter_block(mi) && mi->segment_id <= CR_SEGMENT_ID_BOOST2) {

         if (abs(mv.row) < 8 && abs(mv.col) < 8) {

           if (cpi->consec_zero_mv[map_offset] < 255)

            cpi->consec_zero_mv[map_offset]++;

--- a/vp9/encoder/vp9_noise_estimate.c

+++ b/vp9/encoder/vp9_noise_estimate.c

@@ -102,7 +102,7 @@

   NOISE_ESTIMATE *const ne = &cpi->noise_estimate;

   // Estimate of noise level every frame_period frames.

   int frame_period = 10;

-  int thresh_consec_zeromv = 8;

+  int thresh_consec_zeromv = 6;

   unsigned int thresh_sum_diff = 100;

   unsigned int thresh_sum_spatial = (200 * 200) << 8;

   unsigned int thresh_spatial_var = (32 * 32) << 8;

--- a/vp9/encoder/vp9_skin_detection.c

+++ b/vp9/encoder/vp9_skin_detection.c

@@ -88,7 +88,7 @@

                            int stride, int strideuv, int bsize,

                            int consec_zeromv, int curr_motion_magn) {

   // No skin if block has been zero/small motion for long consecutive time.

-  if (consec_zeromv > 80 && curr_motion_magn == 0) {

+  if (consec_zeromv > 60 && curr_motion_magn == 0) {

     return 0;

   } else {

     int motion = 1;

@@ -100,7 +100,7 @@

     const uint8_t ysource = y[y_height_shift * stride + y_width_shift];

     const uint8_t usource = u[uv_height_shift * strideuv + uv_width_shift];

     const uint8_t vsource = v[uv_height_shift * strideuv + uv_width_shift];

-    if (consec_zeromv > 30 && curr_motion_magn == 0)

+    if (consec_zeromv > 25 && curr_motion_magn == 0)

       motion = 0;

     return vp9_skin_pixel(ysource, usource, vsource, motion);

   }