Revert of Remove VCMQmRobustness.

webrtc/modules/video_coding/qm_select.cc

Index: webrtc/modules/video_coding/qm_select.cc
diff --git a/webrtc/modules/video_coding/qm_select.cc b/webrtc/modules/video_coding/qm_select.cc
index a090ba1e333a51965c151a009902415f4374d221..9da42bb33c6e51652b972f4353d3818654cc737d 100644
--- a/webrtc/modules/video_coding/qm_select.cc
+++ b/webrtc/modules/video_coding/qm_select.cc
@@ -898,4 +898,56 @@
   }
 }
 
+// ROBUSTNESS CLASS
+
+VCMQmRobustness::VCMQmRobustness() {
+  Reset();
+}
+
+VCMQmRobustness::~VCMQmRobustness() {}
+
+void VCMQmRobustness::Reset() {
+  prev_total_rate_ = 0.0f;
+  prev_rtt_time_ = 0;
+  prev_packet_loss_ = 0;
+  prev_code_rate_delta_ = 0;
+  ResetQM();
+}
+
+// Adjust the FEC rate based on the content and the network state
+// (packet loss rate, total rate/bandwidth, round trip time).
+// Note that packetLoss here is the filtered loss value.
+float VCMQmRobustness::AdjustFecFactor(uint8_t code_rate_delta,
+                                       float total_rate,
+                                       float framerate,
+                                       int64_t rtt_time,
+                                       uint8_t packet_loss) {
+  // Default: no adjustment
+  float adjust_fec = 1.0f;
+  if (content_metrics_ == NULL) {
+    return adjust_fec;
+  }
+  // Compute class state of the content.
+  ComputeMotionNFD();
+  ComputeSpatial();
+
+  // TODO(marpan): Set FEC adjustment factor.
+
+  // Keep track of previous values of network state:
+  // adjustment may be also based on pattern of changes in network state.
+  prev_total_rate_ = total_rate;
+  prev_rtt_time_ = rtt_time;
+  prev_packet_loss_ = packet_loss;
+  prev_code_rate_delta_ = code_rate_delta;
+  return adjust_fec;
+}
+
+// Set the UEP (unequal-protection across packets) on/off for the FEC.
+bool VCMQmRobustness::SetUepProtection(uint8_t code_rate_delta,
+                                       float total_rate,
+                                       uint8_t packet_loss,
+                                       bool frame_type) {
+  // Default.
+  return false;
+}
 }  // namespace webrtc