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Updates to adaptive/aggressive denoiser mode.

Parameter changes and modification to zero_last bias.

Change-Id: I50a408d47fde049c562bbe95075194cb0f17c31b

--- a/vp8/encoder/denoising.c

+++ b/vp8/encoder/denoising.c

@@ -413,9 +413,11 @@

     denoiser->nmse_source_diff = 0;

     denoiser->nmse_source_diff_count = 0;

     // TODO(marpan): Adjust thresholds, including effect on resolution.

-    denoiser->threshold_aggressive_mode = 40;

+    denoiser->threshold_aggressive_mode = 35;

     if (width * height > 640 * 480)

-      denoiser->threshold_aggressive_mode = 180;

+      denoiser->threshold_aggressive_mode = 150;

+    else if (width * height > 1280 * 720)

+      denoiser->threshold_aggressive_mode = 1400;

     return 0;

 }

--- a/vp8/encoder/pickinter.c

+++ b/vp8/encoder/pickinter.c

@@ -487,6 +487,7 @@

     MB_PREDICTION_MODE this_mode = x->e_mbd.mode_info_context->mbmi.mode;

     int_mv mv = x->e_mbd.mode_info_context->mbmi.mv;

     int this_rd;

+    int denoise_aggressive = 0;

     /* Exit early and don't compute the distortion if this macroblock

      * is marked inactive. */

     if (cpi->active_map_enabled && x->active_ptr[0] == 0)

@@ -505,10 +506,17 @@

     this_rd = RDCOST(x->rdmult, x->rddiv, rate2, *distortion2);

+#if CONFIG_TEMPORAL_DENOISING

+    if (cpi->oxcf.noise_sensitivity > 0) {

+      denoise_aggressive =

+        (cpi->denoiser.denoiser_mode == kDenoiserOnYUVAggressive) ? 1 : 0;

+    }

+#endif

+

     // Adjust rd for ZEROMV and LAST, if LAST is the closest reference frame.

     if (this_mode == ZEROMV &&

         x->e_mbd.mode_info_context->mbmi.ref_frame == LAST_FRAME &&

-        cpi->closest_reference_frame == LAST_FRAME)

+        (denoise_aggressive || cpi->closest_reference_frame == LAST_FRAME))

     {

         this_rd = ((int64_t)this_rd) * rd_adj / 100;

     }