commit 67b81f92f4bd16b1d640553339b729cb17b3827e
author Alex Glaznev <glaznev@google.com> Mon Feb 22 15:05:15 2016 -0800
committer Alex Glaznev <glaznev@google.com> Mon Feb 22 23:05:26 2016 +0000
tree 5b273cfd5f59b717afe24040e7a2e68190bdba26
parent 18f9ddd7b36fb0dc9a6564fa2fe10e1a34051ee5

Tune QP thresholds for HW H.264 encoder.

Boost low QP threashold to 21, otherwise VGA encoding never
scales up even at 2.5 Mbps.
Also reduce high QP threshold to scale down faster.

BUG=b/26504665
R=jackychen@google.com

Review URL: https://codereview.webrtc.org/1717763003 .

Cr-Commit-Position: refs/heads/master@{#11712}

webrtc/api/java/jni/androidmediaencoder_jni.cc

diff --git a/webrtc/api/java/jni/androidmediaencoder_jni.cc b/webrtc/api/java/jni/androidmediaencoder_jni.cc
index 71e297c..937aef8 100644
--- a/webrtc/api/java/jni/androidmediaencoder_jni.cc
+++ b/webrtc/api/java/jni/androidmediaencoder_jni.cc
@@ -387,8 +387,8 @@
           codec_settings->width, codec_settings->height);
     } else if (codecType_ == kVideoCodecH264) {
       // H264 QP is in the range [0, 51].
-      const int kLowQpThreshold = 17;
-      const int kBadQpThreshold = 40;
+      const int kLowQpThreshold = 21;
+      const int kBadQpThreshold = 36;
       quality_scaler_.Init(kLowQpThreshold, kBadQpThreshold, false,
           codec_settings->startBitrate,
           codec_settings->width, codec_settings->height);