From: Paul Wilkins <paulwilkins@google.com>
Date: Thu, 6 Jan 2011 17:10:07 +0000 (+0000)
Subject: Disable some features for first pass.
X-Git-Tag: v0.9.6~121^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=431dac08d10b28803a0b5754337099bc79a79fb5;p=libvpx

Disable some features for first pass.

The following features don't make sense for the first
pass in its current form and have a significant impact on its
speed (up to 50%).

Slow quantizer, slow dct and trellis optimization.

Change-Id: Id9943f6765ffbd71fc0084ec7dfbc9d376fd6fcd
---

diff --git a/vp8/encoder/onyx_if.c b/vp8/encoder/onyx_if.c
index 56f7ef6f8..96e7a6caa 100644
--- a/vp8/encoder/onyx_if.c
+++ b/vp8/encoder/onyx_if.c
@@ -576,7 +576,7 @@ void vp8_set_speed_features(VP8_COMP *cpi)
 
     cpi->mbs_tested_so_far = 0;
 
-    // best quality
+    // best quality defaults
     sf->RD = 1;
     sf->search_method = NSTEP;
     sf->improved_quant = 1;
@@ -1268,6 +1268,15 @@ void vp8_set_speed_features(VP8_COMP *cpi)
 
     };
 
+    // Slow quant, dct and trellis not worthwhile for first pass
+    // so make sure they are always turned off.
+    if ( cpi->pass == 1 )
+    {
+        sf->improved_quant = 0;
+        sf->optimize_coefficients = 0;
+        sf->improved_dct = 0;
+    }
+
     if (cpi->sf.search_method == NSTEP)
     {
         vp8_init3smotion_compensation(&cpi->mb, cm->yv12_fb[cm->lst_fb_idx].y_stride);