Revert of Remove VCMQmRobustness.

webrtc/modules/video_coding/qm_select.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 880 matching lines @@
     qm_->spatial_height_fact = 4.0f / 3.0f;
   }
   // Check for 2x1 selection.
   if (spatial_err_v < spatial_err_h * (1.0f - kSpatialErrVertVsHoriz) &&
       spatial_err_v < spatial_err * (1.0f - kSpatialErr2X2VsVert)) {
     qm_->spatial_width_fact = 1.0f;
     qm_->spatial_height_fact = 2.0f;
   }
 }
 
+// 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