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1 /* | |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #ifndef WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_ | |
12 #define WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_ | |
13 | |
14 #include <string.h> // NULL | |
15 | |
16 #include "webrtc/modules/video_processing/include/video_processing.h" | |
17 #include "webrtc/typedefs.h" | |
18 | |
19 namespace webrtc { | |
20 | |
21 class VPMDeflickering { | |
22 public: | |
23 VPMDeflickering(); | |
24 ~VPMDeflickering(); | |
25 | |
26 void Reset(); | |
27 int32_t ProcessFrame(VideoFrame* frame, VideoProcessing::FrameStats* stats); | |
28 | |
29 private: | |
30 int32_t PreDetection(uint32_t timestamp, | |
31 const VideoProcessing::FrameStats& stats); | |
32 | |
33 int32_t DetectFlicker(); | |
34 | |
35 enum { kMeanBufferLength = 32 }; | |
36 enum { kFrameHistory_size = 15 }; | |
37 enum { kNumProbs = 12 }; | |
38 enum { kNumQuants = kNumProbs + 2 }; | |
39 enum { kMaxOnlyLength = 5 }; | |
40 | |
41 uint32_t mean_buffer_length_; | |
42 uint8_t detection_state_; // 0: No flickering | |
43 // 1: Flickering detected | |
44 // 2: In flickering | |
45 int32_t mean_buffer_[kMeanBufferLength]; | |
46 uint32_t timestamp_buffer_[kMeanBufferLength]; | |
47 uint32_t frame_rate_; | |
48 static const uint16_t prob_uw16_[kNumProbs]; | |
49 static const uint16_t weight_uw16_[kNumQuants - kMaxOnlyLength]; | |
50 uint8_t quant_hist_uw8_[kFrameHistory_size][kNumQuants]; | |
51 }; | |
52 | |
53 } // namespace webrtc | |
54 | |
55 #endif // WEBRTC_MODULES_VIDEO_PROCESSING_DEFLICKERING_H_ | |
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