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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_PROCESSING_CONTENT_ANALYSIS_H_
#define WEBRTC_MODULES_VIDEO_PROCESSING_CONTENT_ANALYSIS_H_
#include "webrtc/modules/include/module_common_types.h"
#include "webrtc/modules/video_processing/include/video_processing_defines.h"
#include "webrtc/typedefs.h"
#include "webrtc/video_frame.h"
namespace webrtc {
class VPMContentAnalysis {
public:
// When |runtime_cpu_detection| is true, runtime selection of an optimized
// code path is allowed.
explicit VPMContentAnalysis(bool runtime_cpu_detection);
~VPMContentAnalysis();
// Initialize ContentAnalysis - should be called prior to
// extractContentFeature
// Inputs: width, height
// Return value: 0 if OK, negative value upon error
int32_t Initialize(int width, int height);
// Extract content Feature - main function of ContentAnalysis
// Input: new frame
// Return value: pointer to structure containing content Analysis
// metrics or NULL value upon error
VideoContentMetrics* ComputeContentMetrics(const VideoFrame& inputFrame);
// Release all allocated memory
// Output: 0 if OK, negative value upon error
int32_t Release();
private:
// return motion metrics
VideoContentMetrics* ContentMetrics();
// Normalized temporal difference metric: for motion magnitude
typedef int32_t (VPMContentAnalysis::*TemporalDiffMetricFunc)();
TemporalDiffMetricFunc TemporalDiffMetric;
int32_t TemporalDiffMetric_C();
// Motion metric method: call 2 metrics (magnitude and size)
int32_t ComputeMotionMetrics();
// Spatial metric method: computes the 3 frame-average spatial
// prediction errors (1x2,2x1,2x2)
typedef int32_t (VPMContentAnalysis::*ComputeSpatialMetricsFunc)();
ComputeSpatialMetricsFunc ComputeSpatialMetrics;
int32_t ComputeSpatialMetrics_C();
#if defined(WEBRTC_ARCH_X86_FAMILY)
int32_t ComputeSpatialMetrics_SSE2();
int32_t TemporalDiffMetric_SSE2();
#endif
const uint8_t* orig_frame_;
uint8_t* prev_frame_;
int width_;
int height_;
int skip_num_;
int border_;
// Content Metrics: Stores the local average of the metrics.
float motion_magnitude_; // motion class
float spatial_pred_err_; // spatial class
float spatial_pred_err_h_; // spatial class
float spatial_pred_err_v_; // spatial class
bool first_frame_;
bool ca_Init_;
VideoContentMetrics* content_metrics_;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_PROCESSING_CONTENT_ANALYSIS_H_
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