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58 lines
1.8 KiB
58 lines
1.8 KiB
/* *************************************************************************
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** INTEL Corporation Proprietary Information
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**
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** This listing is supplied under the terms of a license
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** agreement with INTEL Corporation and may not be copied
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** nor disclosed except in accordance with the terms of
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** that agreement.
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**
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** Copyright (c) 1995 Intel Corporation.
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** All Rights Reserved.
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**
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** *************************************************************************
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*/
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// $Header: S:\h26x\src\enc\exbrc.h_v 1.2 12 Mar 1996 13:26:58 KLILLEVO $
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// $Log: S:\h26x\src\enc\exbrc.h_v $
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;//
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;// Rev 1.2 12 Mar 1996 13:26:58 KLILLEVO
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;// new rate control with adaptive bit usage profile
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;//
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;// Rev 1.1 05 Feb 1996 17:15:22 TRGARDOS
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;// Converted an unused byte in the BRCState structure to
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;// a variable to store the still quantizer number.
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;//
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;// Rev 1.0 27 Nov 1995 19:49:10 TRGARDOS
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;// Initial revision.
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#ifndef _EXBRC_H_
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#define _EXBRC_H_
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/*
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* Structure for bit rate controller state variables.
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* Size of structure is 32 Bytes.
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*/
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struct BRCStateStruct {
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U32 NumMBs;
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U32 uLastINTRAFrmSz;
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U32 uLastINTERFrmSz;
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int QP_mean;
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U32 uTargetFrmSize;
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float Global_Adj;
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U8 u8INTRA_QP;
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U8 u8INTER_QP;
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U8 u8StillQnt; // Keeps of tracker of Qnt used for still image compression.
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U8 Unassigned[1]; // pad to make a multiple of 16 bytes.
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float TargetFrameRate;
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};
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void InitBRC(BRCStateStruct *BRCState, U8 DefIntraQP, U8 DefInterQP, int NumMBs);
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U8 CalcPQUANT(BRCStateStruct *BRCState, EnumPicCodType PicCodType);
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U8 CalcMBQUANT(BRCStateStruct *BRCState, U32 uTargetPos, U32 uTargetSum, U32 uCumFrmSize, EnumPicCodType PicCodType);
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U8 clampQP(int iUnclampedQP);
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#endif // _EXBRC_H_
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