2557b86e76
The main purpose was the interface-> include rename, but other files were also moved, eliminating the "main" dir. To avoid breaking downstream, the "interface" directories were copied into a new "video_coding/include" dir. The old headers got pragma warnings added about deprecation (a very short deprecation since I plan to remove them as soon downstream is updated). Other files also moved: video_coding/main/source -> video_coding video_coding/main/test -> video_coding/test BUG=webrtc:5095 TESTED=Passing compile-trybots with --clobber flag: git cl try --clobber --bot=win_compile_rel --bot=linux_compile_rel --bot=android_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc R=stefan@webrtc.org, tommi@webrtc.org Review URL: https://codereview.webrtc.org/1417283007 . Cr-Commit-Position: refs/heads/master@{#10694}
228 lines
6.0 KiB
C++
228 lines
6.0 KiB
C++
/*
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* Copyright (c) 2012 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_QM_SELECT_DATA_H_
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#define WEBRTC_MODULES_VIDEO_CODING_QM_SELECT_DATA_H_
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/***************************************************************
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*QMSelectData.h
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* This file includes parameters for content-aware media optimization
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****************************************************************/
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#include "webrtc/typedefs.h"
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namespace webrtc {
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//
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// PARAMETERS FOR RESOLUTION ADAPTATION
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//
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// Initial level of buffer in secs.
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const float kInitBufferLevel = 0.5f;
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// Threshold of (max) buffer size below which we consider too low (underflow).
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const float kPercBufferThr = 0.10f;
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// Threshold on the occurrences of low buffer levels.
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const float kMaxBufferLow = 0.30f;
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// Threshold on rate mismatch.
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const float kMaxRateMisMatch = 0.5f;
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// Threshold on amount of under/over encoder shooting.
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const float kRateOverShoot = 0.75f;
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const float kRateUnderShoot = 0.75f;
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// Factor to favor weighting the average rates with the current/last data.
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const float kWeightRate = 0.70f;
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// Factor for transitional rate for going back up in resolution.
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const float kTransRateScaleUpSpatial = 1.25f;
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const float kTransRateScaleUpTemp = 1.25f;
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const float kTransRateScaleUpSpatialTemp = 1.25f;
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// Threshold on packet loss rate, above which favor resolution reduction.
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const float kPacketLossThr = 0.1f;
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// Factor for reducing transitional bitrate under packet loss.
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const float kPacketLossRateFac = 1.0f;
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// Maximum possible transitional rate for down-sampling:
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// (units in kbps), for 30fps.
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const uint16_t kMaxRateQm[9] = {
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0, // QCIF
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50, // kHCIF
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125, // kQVGA
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200, // CIF
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280, // HVGA
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400, // VGA
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700, // QFULLHD
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1000, // WHD
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1500 // FULLHD
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};
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// Frame rate scale for maximum transition rate.
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const float kFrameRateFac[4] = {
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0.5f, // Low
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0.7f, // Middle level 1
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0.85f, // Middle level 2
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1.0f, // High
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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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// VGA and lower
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0.40f, // L, L
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0.50f, // L, H
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0.40f, // L, D
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0.60f, // H ,L
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0.60f, // H, H
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0.60f, // H, D
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0.50f, // D, L
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0.50f, // D, D
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0.50f, // D, H
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// over VGA
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0.40f, // L, L
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0.50f, // L, H
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0.40f, // L, D
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0.60f, // H ,L
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0.60f, // H, H
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0.60f, // H, D
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0.50f, // D, L
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0.50f, // D, D
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0.50f, // D, H
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};
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// Threshold on the target rate relative to transitional rate.
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const float kFacLowRate = 0.5f;
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// Action for down-sampling:
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// motion=L/H/D,spatial==L/H/D, for low, high, middle levels;
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// rate = 0/1/2, for target rate state relative to transition rate.
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const uint8_t kSpatialAction[27] = {
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// rateClass = 0:
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1, // L, L
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1, // L, H
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1, // L, D
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4, // H ,L
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1, // H, H
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4, // H, D
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4, // D, L
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1, // D, H
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2, // D, D
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// rateClass = 1:
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1, // L, L
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1, // L, H
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1, // L, D
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2, // H ,L
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1, // H, H
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2, // H, D
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2, // D, L
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1, // D, H
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2, // D, D
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// rateClass = 2:
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1, // L, L
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1, // L, H
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1, // L, D
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2, // H ,L
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1, // H, H
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2, // H, D
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2, // D, L
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1, // D, H
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2, // D, D
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};
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const uint8_t kTemporalAction[27] = {
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// rateClass = 0:
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3, // L, L
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2, // L, H
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2, // L, D
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1, // H ,L
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3, // H, H
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1, // H, D
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1, // D, L
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2, // D, H
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1, // D, D
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// rateClass = 1:
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3, // L, L
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3, // L, H
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3, // L, D
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1, // H ,L
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3, // H, H
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1, // H, D
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1, // D, L
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3, // D, H
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1, // D, D
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// rateClass = 2:
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1, // L, L
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3, // L, H
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3, // L, D
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1, // H ,L
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3, // H, H
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1, // H, D
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1, // D, L
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3, // D, H
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1, // D, D
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};
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// Control the total amount of down-sampling allowed.
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const float kMaxSpatialDown = 8.0f;
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const float kMaxTempDown = 3.0f;
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const float kMaxTotalDown = 9.0f;
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// Minimum image size for a spatial down-sampling.
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const int kMinImageSize = 176 * 144;
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// Minimum frame rate for temporal down-sampling:
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// no frame rate reduction if incomingFrameRate <= MIN_FRAME_RATE.
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const int kMinFrameRate = 8;
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//
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// PARAMETERS FOR FEC ADJUSTMENT: TODO (marpan)
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//
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//
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// PARAMETETS FOR SETTING LOW/HIGH STATES OF CONTENT METRICS:
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//
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// Thresholds for frame rate:
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const int kLowFrameRate = 10;
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const int kMiddleFrameRate = 15;
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const int kHighFrameRate = 25;
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// Thresholds for motion: motion level is from NFD.
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const float kHighMotionNfd = 0.075f;
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const float kLowMotionNfd = 0.03f;
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// Thresholds for spatial prediction error:
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// this is applied on the average of (2x2,1x2,2x1).
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const float kHighTexture = 0.035f;
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const float kLowTexture = 0.020f;
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// Used to reduce thresholds for larger/HD scenes: correction factor since
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// higher correlation in HD scenes means lower spatial prediction error.
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const float kScaleTexture = 0.9f;
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// Percentage reduction in transitional bitrate for 2x2 selected over 1x2/2x1.
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const float kRateRedSpatial2X2 = 0.6f;
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const float kSpatialErr2x2VsHoriz = 0.1f; // percentage to favor 2x2 over H
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const float kSpatialErr2X2VsVert = 0.1f; // percentage to favor 2x2 over V
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const float kSpatialErrVertVsHoriz = 0.1f; // percentage to favor H over V
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} // namespace webrtc
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#endif // WEBRTC_MODULES_VIDEO_CODING_QM_SELECT_DATA_H_
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