Add initial bitrate and frame resolution parameters to quality scaler.

talk/app/webrtc/java/jni/androidmediaencoder_jni.cc

Index: talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
diff --git a/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc b/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
index aade95ba46a4eaad5ad409455accbd7de476dee2..7a115af479b652d72fbb131d99997f2d2d66cbff 100644
--- a/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
+++ b/talk/app/webrtc/java/jni/androidmediaencoder_jni.cc
@@ -372,7 +372,6 @@ int32_t MediaCodecVideoEncoder::InitEncode(
     size_t /* max_payload_size */) {
   const int kMinWidth = 320;
   const int kMinHeight = 180;
-  const int kLowQpThresholdDenominator = 3;
   if (codec_settings == NULL) {
     ALOGE << "NULL VideoCodec instance";
     return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
@@ -393,16 +392,20 @@ int32_t MediaCodecVideoEncoder::InitEncode(
       // (internal) range: [0, 127]. And we cannot change QP_max in HW, so it is
       // always = 127. Note that in SW, QP is that of the user-level range [0,
       // 63].
-      const int kMaxQp = 127;
-      const int kBadQpThreshold = 95;
-      quality_scaler_.Init(
-          kMaxQp / kLowQpThresholdDenominator, kBadQpThreshold, false);
+      const int kLowQpThreshold = 32;
+      const int kBadQpThreshold = 92;
+      quality_scaler_.Init(kLowQpThreshold, kBadQpThreshold, false,
+          codec_settings->startBitrate,
+          codec_settings->width, codec_settings->height);
     } else if (codecType_ == kVideoCodecH264) {
       // H264 QP is in the range [0, 51].
       const int kMaxQp = 51;
+      const int kLowQpThresholdDenominator = 3;

[pbos-webrtc, 2016/02/09 20:31:29]

Let's just put a constant here without the denominator.

[AlexG, 2016/02/09 23:37:18]

Done.

       const int kBadQpThreshold = 40;
       quality_scaler_.Init(
-          kMaxQp / kLowQpThresholdDenominator, kBadQpThreshold, false);
+          kMaxQp / kLowQpThresholdDenominator, kBadQpThreshold, false,
+          codec_settings->startBitrate,
+          codec_settings->width, codec_settings->height);
     } else {
       // When adding codec support to additional hardware codecs, also configure
       // their QP thresholds for scaling.