git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

modules/video_coding/main/source/content_metrics_processing.h

@@ -0,0 +1,77 @@
+/*
+ *  Copyright (c) 2011 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 "typedefs.h"
+
+namespace webrtc
+{
+
+struct VideoContentMetrics;
+
+// QM interval time
+enum { kQmMinIntervalMs = 10000 };
+enum { kCcMinIntervalMs = 5000 };
+
+//Flag for NFD metric vs motion metric
+enum { kNfdMetric  = 1 };
+
+/**********************************/
+/* Content Metrics Processing     */
+/**********************************/
+class VCMContentMetricsProcessing
+{
+public:
+    VCMContentMetricsProcessing();
+    ~VCMContentMetricsProcessing();
+
+    // Update class with latest metrics
+    WebRtc_Word32 UpdateContentData(const VideoContentMetrics *contentMetrics);
+
+    // Check for content change detection
+    bool ContentChangeCheck();
+
+    //Initialize to
+    WebRtc_Word32 Reset();
+
+    // Inform class of current frame rate
+    void UpdateFrameRate(WebRtc_UWord32 frameRate);
+
+    // Get working (avg) value
+    VideoContentMetrics* Data();
+private:
+
+    // Compute working avg
+    WebRtc_UWord32 ProcessContent(const VideoContentMetrics *contentMetrics);
+
+    // Computation of global metric
+    void UpdateGlobalMetric(const VideoContentMetrics *contentMetrics);
+
+    // Compute local average of certain metrics for content change detection
+    void UpdateLocalMetricCC(float motionVal, float spatialVal);
+
+    VideoContentMetrics*    _globalRecursiveAvg;
+    WebRtc_UWord32          _frameRate;
+    float                   _recAvgFactor;
+    WebRtc_UWord32          _frameCnt;
+
+    float                   _prevAvgSizeZeroMotion;
+    float                   _avgSizeZeroMotion;
+    float                   _prevAvgSpatialPredErr;
+    float                   _avgSpatialPredErr;
+    WebRtc_UWord32          _frameCntForCC;
+    WebRtc_UWord64          _lastCCpdateTime;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_VIDEO_CODING_CONTENT_METRICS_PROCESSING_H_