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/*
* 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_PROCESSING_DEFLICKERING_H_
#define WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_
#include <string.h> // NULL
#include "webrtc/modules/video_processing/include/video_processing.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class VPMDeflickering {
public:
VPMDeflickering();
~VPMDeflickering();
void Reset();
int32_t ProcessFrame(VideoFrame* frame, VideoProcessing::FrameStats* stats);
private:
int32_t PreDetection(uint32_t timestamp,
const VideoProcessing::FrameStats& stats);
int32_t DetectFlicker();
enum { kMeanBufferLength = 32 };
enum { kFrameHistory_size = 15 };
enum { kNumProbs = 12 };
enum { kNumQuants = kNumProbs + 2 };
enum { kMaxOnlyLength = 5 };
uint32_t mean_buffer_length_;
uint8_t detection_state_; // 0: No flickering
// 1: Flickering detected
// 2: In flickering
int32_t mean_buffer_[kMeanBufferLength];
uint32_t timestamp_buffer_[kMeanBufferLength];
uint32_t frame_rate_;
static const uint16_t prob_uw16_[kNumProbs];
static const uint16_t weight_uw16_[kNumQuants - kMaxOnlyLength];
uint8_t quant_hist_uw8_[kFrameHistory_size][kNumQuants];
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_
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