shithub: libvpx

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vp9: Turn on the partition copy for speed 8. Tune threshold.

For speed 8, it speeds up the encoding on android by 6% for QVGA and
7.4% for VGA with the new threshold. Overall PSNR is improved by 0.667
for rtc.

Change-Id: I4a644560b32c0b5b4e9f49ffb953d000413a3732

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

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

@@ -516,6 +516,7 @@

     // The thresholds below are not changed locally.

     if (is_key_frame) {

       cpi->vbp_threshold_sad = 0;

+      cpi->vbp_threshold_copy = 0;

       cpi->vbp_bsize_min = BLOCK_8X8;

     } else {

       if (cm->width <= 352 && cm->height <= 288)

@@ -525,8 +526,13 @@

                                      ? (cpi->y_dequant[q][1] << 1)

                                      : 1000;

       cpi->vbp_bsize_min = BLOCK_16X16;

+      if (cm->width <= 352 && cm->height <= 288)

+        cpi->vbp_threshold_copy = 40960;

+      else

+        cpi->vbp_threshold_copy = (cpi->y_dequant[q][1] << 6) > 32000

+                                      ? (cpi->y_dequant[q][1] << 6)

+                                      : 32000;

     }

-    cpi->vbp_threshold_copy = cpi->vbp_thresholds[0] << 16;

     cpi->vbp_threshold_minmax = 15 + (q >> 3);

   }

 }

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

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

@@ -497,8 +497,10 @@

   if (speed >= 8) {

     sf->adaptive_rd_thresh = 4;

-    // Disabled for now until the threshold is tuned.

-    sf->copy_partition_flag = 0;

+    // Enable partition copy

+    if (!cpi->use_svc && !cpi->resize_pending && !cpi->resize_state &&

+        !cpi->external_resize)

+      sf->copy_partition_flag = 1;

     if (sf->copy_partition_flag) {

       if (cpi->prev_partition == NULL) {

         cpi->prev_partition = (BLOCK_SIZE *)vpx_calloc(