85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
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/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* content_analysis.h
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*/
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#ifndef VPM_CONTENT_ANALYSIS_H
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#define VPM_CONTENT_ANALYSIS_H
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#include "typedefs.h"
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#include "module_common_types.h"
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#include "spatial_resampler.h"
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namespace webrtc {
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class VPMContentAnalysis
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{
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public:
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VPMContentAnalysis();
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~VPMContentAnalysis();
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//Initialize ContentAnalysis - should be called prior to extractContentFeature
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//Inputs: width, height
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//Return value: 0 if OK, negative value upon error
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WebRtc_Word32 Initialize( WebRtc_UWord16 width, WebRtc_UWord16 height);
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//Extract content Feature - main function of ContentAnalysis
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//Input: new frame
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//Return value: pointer to structure containing content Analysis metrics or NULL value upon error
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VideoContentMetrics* ComputeContentMetrics(const VideoFrame* inputFrame);
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//Release all allocated memory
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//Output: 0 if OK, negative value upon error
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WebRtc_Word32 Release();
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private:
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//return motion metrics
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VideoContentMetrics* ContentMetrics();
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//Normalized temporal difference metric: for motion magnitude
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WebRtc_Word32 TemporalDiffMetric();
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//Motion metric method: call 2 metrics (magnitude and size)
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WebRtc_Word32 ComputeMotionMetrics();
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//Spatial metric method: computes the 3 frame-average spatial prediction errors (1x2,2x1,2x2)
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WebRtc_Word32 ComputeSpatialMetrics();
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const WebRtc_UWord8* _origFrame;
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WebRtc_UWord8* _prevFrame;
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WebRtc_UWord16 _width;
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WebRtc_UWord16 _height;
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//Content Metrics:
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//stores the local average of the metrics
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float _motionMagnitudeNZ; //for motion class
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float _spatialPredErr; //for spatial class
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float _spatialPredErrH; //for spatial class
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float _spatialPredErrV; //for spatial class
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float _sizeZeroMotion; //for motion class
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float _motionPredErr; //for complexity class:
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float _motionHorizontalness; //for coherence class
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float _motionClusterDistortion; //for coherence class
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bool _firstFrame;
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bool _CAInit;
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VideoContentMetrics* _cMetrics;
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}; // end of VPMContentAnalysis class definition
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} // namespace
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#endif
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