1 //<MStar Software> 2 //****************************************************************************** 3 // MStar Software 4 // Copyright (c) 2010 - 2012 MStar Semiconductor, Inc. All rights reserved. 5 // All software, firmware and related documentation herein ("MStar Software") are 6 // intellectual property of MStar Semiconductor, Inc. ("MStar") and protected by 7 // law, including, but not limited to, copyright law and international treaties. 8 // Any use, modification, reproduction, retransmission, or republication of all 9 // or part of MStar Software is expressly prohibited, unless prior written 10 // permission has been granted by MStar. 11 // 12 // By accessing, browsing and/or using MStar Software, you acknowledge that you 13 // have read, understood, and agree, to be bound by below terms ("Terms") and to 14 // comply with all applicable laws and regulations: 15 // 16 // 1. MStar shall retain any and all right, ownership and interest to MStar 17 // Software and any modification/derivatives thereof. 18 // No right, ownership, or interest to MStar Software and any 19 // modification/derivatives thereof is transferred to you under Terms. 20 // 21 // 2. You understand that MStar Software might include, incorporate or be 22 // supplied together with third party`s software and the use of MStar 23 // Software may require additional licenses from third parties. 24 // Therefore, you hereby agree it is your sole responsibility to separately 25 // obtain any and all third party right and license necessary for your use of 26 // such third party`s software. 27 // 28 // 3. MStar Software and any modification/derivatives thereof shall be deemed as 29 // MStar`s confidential information and you agree to keep MStar`s 30 // confidential information in strictest confidence and not disclose to any 31 // third party. 32 // 33 // 4. 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These terms shall be governed by and construed in accordance with the laws 66 // of Taiwan, R.O.C., excluding its conflict of law rules. 67 // Any and all dispute arising out hereof or related hereto shall be finally 68 // settled by arbitration referred to the Chinese Arbitration Association, 69 // Taipei in accordance with the ROC Arbitration Law and the Arbitration 70 // Rules of the Association by three (3) arbitrators appointed in accordance 71 // with the said Rules. 72 // The place of arbitration shall be in Taipei, Taiwan and the language shall 73 // be English. 74 // The arbitration award shall be final and binding to both parties. 75 // 76 //****************************************************************************** 77 //<MStar Software> 78 #ifndef _MFE_RATECTRL_H_ 79 #define _MFE_RATECTRL_H_ 80 81 //#define CHECK_1SEC_BITRATE 82 83 #include "mfe_type.h" 84 #include "msRateCtrl.h" 85 #define MAX_FRAMERATE 30UL 86 87 #define SPEC_MAX_QP (31UL) 88 #define SPEC_MIN_QP (1UL) 89 /* Input for rate control */ 90 typedef struct { 91 MS_S32 nWidth, nHeight; 92 MS_FLOAT fTargetFrameRate, fMinFrameRate; 93 MS_S32 m_nBitrate; 94 MS_S32 nPCount; // Number of P-frames betweeen I-frames 95 RC_GRANULARITY rcGranularity; 96 RC_METHOD rcMethod; 97 } H263RCInfo; 98 99 typedef struct RateCtrl { 100 /* Input parameters */ 101 102 MS_S32 m_nWidth, m_nHeight; 103 MS_FLOAT m_fTargetFrameRate, m_fMinFrameRate; 104 MS_S32 m_nBitrate; 105 MS_S32 m_nPCount; 106 RC_GRANULARITY m_rcGranularity; 107 RC_METHOD m_rcMethod; 108 // Derived variables 109 MS_FLOAT m_fAvgBitsPerFrame; 110 111 /* rate control variables */ 112 113 MS_S32 m_nFrameCount; // How many frame coded 114 MS_S32 m_nBufFullness; // Rate control buffer 115 MS_U64 m_nTotalBits; 116 // Last-frame status 117 MS_S32 m_nLastFrameBits, m_nLastFrameAvgQP; 118 MS_S32 m_nLastTargetBits; 119 120 /* Bitrate usage compensation */ 121 MS_S32 m_nTargetFullness; 122 MS_S32 m_nDeputyCount, m_nMinDeputyCount; 123 124 /* Variable bitrate */ 125 MS_FLOAT m_fLongTermQP; 126 127 // Model parameters 128 MS_S32 m_nTargetBits; // target number of bits of current frame 129 MS_S32 m_nNFrame; // number of macroblocks in a frame 130 MS_S32 m_nWidthInMb; // Frame width in MB 131 132 /* Below are for STRICT_CONST_BITRATE */ 133 134 // Dynamic framerate 135 MS_U8 m_bDropFrameEnabled; // Enabled when min-framerate < max-framerate. 136 MS_S32 m_nSkipCount; // The historic accumulated skip-frame count in one second 137 MS_S32 m_nSkipCountMax; // Constant: The allowable maximal dropped frame count in 1sec, depends on Min&Max framerate. 138 MS_S32 m_nContSkipCount; // Result: The determined continuous skip-frame count. 139 // Keep track of historic skip-frame status. 140 MS_U32 m_nWinIndex; 141 MS_U32 m_nWinIndexMax; // Constant: corresponds to 1 sec. 142 MS_U8 m_SkipFrameHistory[MAX_FRAMERATE]; // Skip-frame history: 1 is Skipped, 0 is not. 143 // Bitrate monitoring 144 // Over-usage: Skip following frame(s) to compensate immediately 145 // Shortage: Keep a lower-bound to assure low-delay in constant-bandwidth network. 146 MS_S32 m_nBitrateOverUsage; // Accumulated bitrate over-usage. 147 // Determine how many spare bitcount of skipped frames will be transfered into next coded frame. 148 MS_S32 m_nCompensateBitrate; // Bitrate transferred to next coded frame. 149 MS_S32 m_nCompensateFrame; // How many skipped frame will contribute bitrate compenstaion. 150 // The maximal bitrate is set to caller-input bitrate 151 // And re-calculate internal target bitrate < m_nBitrateMax. 152 MS_S32 m_nBitrateMax; 153 // When continuous good frame, gently reducing frameerate to avoid CPU high usage. 154 MS_S32 m_nContGoodFrameCount; 155 156 #if defined(CHECK_1SEC_BITRATE) 157 // Runtime bitrate 158 MS_S32 m_nBrHistIndex; 159 MS_S32 m_BitrateHistory[MAX_FRAMERATE]; 160 // Runtime delay: Assuming constant-bandwidth channel 161 MS_S32 m_nUnsentBits; 162 #endif 163 } RateCtrl_t; 164 165 void rc_Create(RateCtrl_t* rcctx); 166 void rc_Destroy(RateCtrl_t* rcctx); 167 // Global 168 void rc_Init(RateCtrl_t* rcctx, H263RCInfo* pRCInfo); 169 void rc_Finish(RateCtrl_t* rcctx); 170 // Each frame 171 MS_S32 rc_CheckSkippedFrame(RateCtrl_t* rcctx); 172 MS_S32 rc_InitFrame(RateCtrl_t* rcctx, MS_S8 chFrameType); // Return the initial frame qp 173 void rc_UpdateFrame(RateCtrl_t* rcctx, const MS_S32 totalUsedBits,const MS_S32 lastAvgQP, MS_BOOL bDummyFrame); 174 175 #endif 176