shithub: libvpx

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Tweaks to determination of slide show groups.

Slight adjustment to rules for defining static groups.
Adjustment of small bias towards 0,0 motion in first pass.

Change-Id: Id1d3753979ad54622f983f4de08472738317ec8e

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -44,7 +44,6 @@

 #define COMPLEXITY_STATS_OUTPUT 0

 #define FIRST_PASS_Q 10.0

-#define INTRA_MODE_PENALTY 1024

 #define MIN_ARF_GF_BOOST 240

 #define MIN_DECAY_FACTOR 0.01

 #define NEW_MV_MODE_PENALTY 32

@@ -812,6 +811,8 @@

                    fp_acc_data->image_data_start_row);

 }

+#define NZ_MOTION_PENALTY 128

+#define INTRA_MODE_PENALTY 1024

 void vp9_first_pass_encode_tile_mb_row(VP9_COMP *cpi, ThreadData *td,

                                        FIRSTPASS_DATA *fp_acc_data,

                                        TileDataEnc *tile_data, MV *best_ref_mv,

@@ -1059,7 +1060,7 @@

       // Compute the motion error of the 0,0 motion using the last source

       // frame as the reference. Skip the further motion search on

-      // reconstructed frame if this error is small.

+      // reconstructed frame if this error is very small.

       unscaled_last_source_buf_2d.buf =

           cpi->unscaled_last_source->y_buffer + recon_yoffset;

       unscaled_last_source_buf_2d.stride = cpi->unscaled_last_source->y_stride;

@@ -1076,8 +1077,7 @@

                                               &unscaled_last_source_buf_2d);

 #endif  // CONFIG_VP9_HIGHBITDEPTH

-      // TODO(pengchong): Replace the hard-coded threshold

-      if (raw_motion_error > 25) {

+      if (raw_motion_error > NZ_MOTION_PENALTY) {

         // Test last reference frame using the previous best mv as the

         // starting point (best reference) for the search.

         first_pass_motion_search(cpi, x, best_ref_mv, &mv, &motion_error);

@@ -2861,7 +2861,8 @@

       // Monitor for static sections.

       if ((rc->frames_since_key + i - 1) > 1) {

-        zero_motion_accumulator *= get_zero_motion_factor(cpi, &next_frame);

+        zero_motion_accumulator = VPXMIN(

+            zero_motion_accumulator, get_zero_motion_factor(cpi, &next_frame));

       }

       // Break clause to detect very still sections after motion. For example,