Move the QP scaling thresholds to the relevant encoders

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
index 179081ae333fef4b3cc0e6fcbbd42bd31c7bb80e..75b667456bf57d942a0a396e1d800ad10eb0f546 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -34,6 +34,12 @@
 namespace webrtc {
 namespace {
 
+// QP is obtained from VP8-bitstream for HW, so the QP corresponds to the
+// bitstream range of [0, 127] and not the user-level range of [0,63].
+static const int kLowVp8QpThreshold = 29;
+static const int kHighVp8QpThreshold = 95;
+

[magjed_webrtc, 2016/09/06 07:49:09]

nit: remove extra line

+
 enum { kVp8ErrorPropagationTh = 30 };
 enum { kVp832ByteAlign = 32 };
 
@@ -603,8 +609,8 @@ int VP8EncoderImpl::InitEncode(const VideoCodec* inst,
   }
 
   rps_.Init();
-  quality_scaler_.Init(QualityScaler::kLowVp8QpThreshold,
-                       QualityScaler::kBadVp8QpThreshold, codec_.startBitrate,
+  quality_scaler_.Init(kLowVp8QpThreshold,
+                       kHighVp8QpThreshold, codec_.startBitrate,
                        codec_.width, codec_.height, codec_.maxFramerate);
 
   // Only apply scaling to improve for single-layer streams. The scaling metrics