145 lines
4.3 KiB
C++
145 lines
4.3 KiB
C++
/*
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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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#ifndef WEBRTC_MODULES_VIDEO_CODING_SOURCE_QM_SELECT_DATA_H_
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#define WEBRTC_MODULES_VIDEO_CODING_SOURCE_QM_SELECT_DATA_H_
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/***************************************************************
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*QMSelectData.h
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* This file includes parameters used by the Quality Modes selection process
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****************************************************************/
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#include "typedefs.h"
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namespace webrtc
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{
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//Initial level of buffer in secs: should corresponds to wrapper settings
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#define INIT_BUFFER_LEVEL 0.5
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//
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//PARAMETERS FOR QM SELECTION
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//
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//Threshold of (max) buffer size below which we consider too low (underflow)
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#define PERC_BUFFER_THR 0.10
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//Threshold on rate mismatch
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#define MAX_RATE_MM 0.5
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//Threshold on the occurrences of low buffer levels
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#define MAX_BUFFER_LOW 0.5
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//Factor for transitional rate for going back up in resolution
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#define TRANS_RATE_SCALE_UP_SPATIAL 1.25
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#define TRANS_RATE_SCALE_UP_TEMP 1.25
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//Maximum possible transitional rate: (units in kbps), for 30fps
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const WebRtc_UWord16 kMaxRateQm[7] = {
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100, //QCIF
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500, //CIF
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800, //VGA
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1500, //4CIF
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2000, //720 HD 4:3,
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2500, //720 HD 16:9
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3000 //1080HD
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};
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//Scale for transitional rate: based on content class
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// motion=L/H/D,spatial==L/H/D: for low, high, middle levels
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const float kScaleTransRateQm[18] = {
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//4CIF and lower
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0.25f, // L, L
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0.75f, // L, H
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0.75f, // L, D
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0.75f, // H ,L
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0.50f, // H, H
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0.50f, // H, D
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0.50f, // D, L
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0.625f, // D, D
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0.25f, // D, H
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//over 4CIF: WHD, HD
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0.25f, // L, L
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0.75f, // L, H
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0.75f, // L, D
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0.75f, // H ,L
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0.50f, // H, H
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0.50f, // H, D
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0.50f, // D, L
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0.625f, // D, D
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0.25f // D, H
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};
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//Control the total amount of down-sampling allowed
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#define MAX_SPATIAL_DOWN_FACT 4
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#define MAX_TEMP_DOWN_FACT 4
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#define MAX_SPATIAL_TEMP_DOWN_FACT 8
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//
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//
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//
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//PARAMETETS FOR SETTING LOW/HIGH VALUES OF METRICS:
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//
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//Threshold to determine if high amount of zero_motion
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#define HIGH_ZERO_MOTION_SIZE 0.95
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//Thresholds for motion: motion level is derived from motion vectors: motion = size_nz*magn_nz
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#define HIGH_MOTION 0.7
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#define LOW_MOTION 0.4
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//Thresholds for motion: motion level is from NFD
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#define HIGH_MOTION_NFD 0.075
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#define LOW_MOTION_NFD 0.04
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//Thresholds for spatial prediction error: this is appLied on the min(2x2,1x2,2x1)
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#define HIGH_TEXTURE 0.035
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#define LOW_TEXTURE 0.025
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//Used to reduce thresholds for HD scenes: correction factor since higher
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//correlation in HD scenes means lower spatial prediction error
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#define SCALE_TEXTURE_HD 0.9;
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//Thresholds for distortion and horizontalness: applied on product: horiz_nz/dist_nz
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#define COHERENCE_THR 1.0
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#define COH_MAX 10
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//
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//
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#define RATE_RED_SPATIAL_2X2 0.6 //percentage reduction in transitional bitrate where 2x2 is selected over 1x2/2x1
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#define SPATIAL_ERR_2X2_VS_H 0.1 //percentage to favor 2x2
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#define SPATIAL_ERR_2X2_VS_V 0.1 //percentage to favor 2x2 over V
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#define SPATIAL_ERR_V_VS_H 0.1 //percentage to favor H over V
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//Minimum image size for a spatial mode selection: no spatial down-sampling if input size <= MIN_IMAGE_SIZE
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#define MIN_IMAGE_SIZE 25344 //176*144
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//Minimum frame rate for temporal mode: no frame rate reduction if incomingFrameRate <= MIN_FRAME_RATE
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#define MIN_FRAME_RATE_QM 8
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//Avoid outliers in seq-rate MM
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#define THRESH_SUM_MM 1000
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const WebRtc_UWord32 kFrameSizeTh[6] = {
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// boundaries for the closest standard frame size
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63360, //between 176*144 and 352*288
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204288, //between 352*288 and 640*480
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356352, //between 640*480 and 704*576
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548352, //between 704*576 and 960*720
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806400, //between 960*720 and 1280*720
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1497600, // between 1280*720 and 1920*1080
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_SOURCE_QM_SELECT_DATA_H_
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