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diff --git a/webrtc/modules/video_coding/content_metrics_processing.h b/webrtc/modules/video_coding/content_metrics_processing.h
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+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_CONTENT_METRICS_PROCESSING_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CONTENT_METRICS_PROCESSING_H_
+
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+struct VideoContentMetrics;
+
+// QM interval time (in ms)
+enum { kQmMinIntervalMs = 10000 };
+
+// Flag for NFD metric vs motion metric
+enum { kNfdMetric = 1 };
+
+/**********************************/
+/* Content Metrics Processing     */
+/**********************************/
+class VCMContentMetricsProcessing {
+ public:
+  VCMContentMetricsProcessing();
+  ~VCMContentMetricsProcessing();
+
+  // Update class with latest metrics.
+  int UpdateContentData(const VideoContentMetrics* contentMetrics);
+
+  // Reset the short-term averaged content data.
+  void ResetShortTermAvgData();
+
+  // Initialize.
+  int Reset();
+
+  // Inform class of current frame rate.
+  void UpdateFrameRate(uint32_t frameRate);
+
+  // Returns the long-term averaged content data: recursive average over longer
+  // time scale.
+  VideoContentMetrics* LongTermAvgData();
+
+  // Returns the short-term averaged content data: uniform average over
+  // shorter time scalE.
+  VideoContentMetrics* ShortTermAvgData();
+
+ private:
+  // Compute working average.
+  int ProcessContent(const VideoContentMetrics* contentMetrics);
+
+  // Update the recursive averaged metrics: longer time average (~5/10 secs).
+  void UpdateRecursiveAvg(const VideoContentMetrics* contentMetrics);
+
+  // Update the uniform averaged metrics: shorter time average (~RTCP report).
+  void UpdateUniformAvg(const VideoContentMetrics* contentMetrics);
+
+  VideoContentMetrics* recursive_avg_;
+  VideoContentMetrics* uniform_avg_;
+  float recursive_avg_factor_;
+  uint32_t frame_cnt_uniform_avg_;
+  float avg_motion_level_;
+  float avg_spatial_level_;
+};
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CONTENT_METRICS_PROCESSING_H_