QMUtils.cpp
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:15k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /* $Id: QMUtils.cpp,v 1.2 2001/04/19 18:32:10 wmay Exp $ */
- /****************************************************************************/
- /* MPEG4 Visual Texture Coding (VTC) Mode Software */
- /* */
- /* This software was jointly developed by the following participants: */
- /* */
- /* Single-quant, multi-quant and flow control */
- /* are provided by Sarnoff Corporation */
- /* Iraj Sodagar (iraj@sarnoff.com) */
- /* Hung-Ju Lee (hjlee@sarnoff.com) */
- /* Paul Hatrack (hatrack@sarnoff.com) */
- /* Shipeng Li (shipeng@sarnoff.com) */
- /* Bing-Bing Chai (bchai@sarnoff.com) */
- /* B.S. Srinivas (bsrinivas@sarnoff.com) */
- /* */
- /* Bi-level is provided by Texas Instruments */
- /* Jie Liang (liang@ti.com) */
- /* */
- /* Shape Coding is provided by OKI Electric Industry Co., Ltd. */
- /* Zhixiong Wu (sgo@hlabs.oki.co.jp) */
- /* Yoshihiro Ueda (yueda@hlabs.oki.co.jp) */
- /* Toshifumi Kanamaru (kanamaru@hlabs.oki.co.jp) */
- /* */
- /* OKI, Sharp, Sarnoff, TI and Microsoft contributed to bitstream */
- /* exchange and bug fixing. */
- /* */
- /* */
- /* In the course of development of the MPEG-4 standard, this software */
- /* module is an implementation of a part of one or more MPEG-4 tools as */
- /* specified by the MPEG-4 standard. */
- /* */
- /* The copyright of this software belongs to ISO/IEC. ISO/IEC gives use */
- /* of the MPEG-4 standard free license to use this software module or */
- /* modifications thereof for hardware or software products claiming */
- /* conformance to the MPEG-4 standard. */
- /* */
- /* Those intending to use this software module in hardware or software */
- /* products are advised that use may infringe existing patents. The */
- /* original developers of this software module and their companies, the */
- /* subsequent editors and their companies, and ISO/IEC have no liability */
- /* and ISO/IEC have no liability for use of this software module or */
- /* modification thereof in an implementation. */
- /* */
- /* Permission is granted to MPEG members to use, copy, modify, */
- /* and distribute the software modules ( or portions thereof ) */
- /* for standardization activity within ISO/IEC JTC1/SC29/WG11. */
- /* */
- /* Copyright 1995, 1996, 1997, 1998 ISO/IEC */
- /****************************************************************************/
- /************************************************************/
- /* Sarnoff Very Low Bit Rate Still Image Coder */
- /* Copyright 1995, 1996, 1997, 1998 Sarnoff Corporation */
- /************************************************************/
- #include <stdio.h>
- #include "dataStruct.hpp"
- #include "globals.hpp"
- #include "states.hpp"
- #include "QM.hpp"
- #include "QMUtils.hpp"
- #include "errorHandler.hpp"
- /*
- Function Name
- -------------
- Int findChild(Int x, Int y, Int xc[], Int yc[])
- Arguments
- ---------
- Int x, Int y - Index of wavelet coefficient (row, col) to check.
- Int xc[], Int yc[] - Indices of the (maximum of 4) children of (x,y).
- Description
- -----------
- findChild returns the number of children of (x,y). If there are
- children it puts their indices in (xc, yc).
- mzte_codec.dcWidth, mzte_codec.dcHeight, mzte_codec.SPlayer.width, and
- mzte_codec.SPlayer.height must all be set to their proper values.
- Functions Called
- ----------------
- none
- Return Value
- ------------
- The number of children of (x,y).
- Source File
- -----------
- QMUtils.c
- */
- Int CVTCCommon::findChild(Int x, Int y, Int xc[], Int yc[], Int c)
- {
- Int numChildren;
- if (x < mzte_codec.m_iDCWidth && y < mzte_codec.m_iDCHeight)
- {
- /*------------------- DC Band ---------------------*/
- numChildren = 3;
- xc[0] = x + mzte_codec.m_iDCWidth;
- yc[0] = y;
- xc[1] = x;
- yc[1] = y + mzte_codec.m_iDCHeight;
- xc[2] = x + mzte_codec.m_iDCWidth;
- yc[2] = y + mzte_codec.m_iDCHeight;
- }
- else if((x *= 2) < mzte_codec.m_SPlayer[c].width &&
- (y *= 2) < mzte_codec.m_SPlayer[c].height)
- {
- /*------------------- Non-Leaf AC Band ---------------------*/
- numChildren = 4;
- xc[0] = x;
- yc[0] = y;
- xc[1] = x+1;
- yc[1] = y ;
- xc[2] = x ;
- yc[2] = y+1;
- xc[3] = x+1;
- yc[3] = y+1;
- }
- else
- /*------------------- Leaf AC Band ---------------------*/
- numChildren = 0;
- return numChildren;
- }
- /*
- Function Name
- -------------
- Int isIndexInRootBands(Int x, Int y)
- Arguments
- ---------
- Int x, Int y - Index of wavelet coefficient (row, col) to check.
- Description
- -----------
- isIndexInRootBands checks if (x,y) is in a root band (first three AC
- bands which aren't leafs).
- mzte_codec.dcWidth, mzte_codec.dcHeight, mzte_codec.SPlayer.width, and
- mzte_codec.SPlayer.height must all be set to their proper values.
- Functions Called
- ----------------
- none
- Return Value
- ------------
- The number of children of (x,y).
- Source File
- -----------
- QMUtils.c
- */
- Int CVTCCommon::isIndexInRootBands(Int x, Int y, Int c)
- {
- Int x1, x2, y1, y2;
- x1 = mzte_codec.m_iDCWidth<<1;
- x2 = mzte_codec.m_SPlayer[c].width>>1;
- y1 = mzte_codec.m_iDCHeight<<1;
- y2 = mzte_codec.m_SPlayer[c].height>>1;
- return x < MIN(x1,x2) && y < MIN(y1,y2)
- && (x >= mzte_codec.m_iDCWidth || y >= mzte_codec.m_iDCHeight);
- }
- /*
- Function Name
- -------------
- Void markCoeff(Int x, Int y, UChar valuedDes)
- Arguments
- ---------
- Int x, Int y - Index of wavelet coefficient (row, col) to mark.
- UChar valuedDes - Flag for existence of non-zero descendents at
- (x,y). 0 = all descendents are zero, 1 = some descendents are non-zero.
- Description
- -----------
- Mark type of current coefficient.
- Functions Called
- ----------------
- none
- Return Value
- ------------
- none
- Source File
- -----------
- QMUtils.c
- */
- Void CVTCCommon::markCoeff(Int x, Int y, UChar valuedDes, Int c)
- {
- if (COEFF_STATE(x,y,c) == S_INIT || COEFF_STATE(x,y,c) == S_ZTR
- || COEFF_STATE(x,y,c) == S_ZTR_D)
- {
- if (COEFF_VAL(x,y,c))
- {
- if (valuedDes)
- COEFF_TYPE(x,y,c) = VAL;
- else
- COEFF_TYPE(x,y,c) = VZTR;
- }
- else
- {
- if (valuedDes)
- COEFF_TYPE(x,y,c) = IZ;
- else
- COEFF_TYPE(x,y,c) = ZTR;
- }
- }
- else if (COEFF_STATE(x,y,c) == S_IZ)
- {
- if (COEFF_VAL(x,y,c))
- COEFF_TYPE(x,y,c) = VAL;
- else
- COEFF_TYPE(x,y,c) = IZ;
- }
- else if (COEFF_STATE(x,y,c) == S_VZTR)
- {
- if (valuedDes)
- COEFF_TYPE(x,y,c) = VAL;
- else
- COEFF_TYPE(x,y,c) = VZTR;
- }
- else if (COEFF_STATE(x,y,c) == S_VAL)
- {
- COEFF_TYPE(x,y,c) = VAL;
- }
- else if (COEFF_STATE(x,y,c) == S_LINIT || COEFF_STATE(x,y,c) == S_LZTR
- || COEFF_STATE(x,y,c) == S_LZTR_D)
- {
- if (COEFF_VAL(x,y,c))
- COEFF_TYPE(x,y,c) = VZTR;
- else
- COEFF_TYPE(x,y,c) = ZTR;
- }
- else /* if (COEFF_STATE(x,y,c) == S_LVZTR) */
- COEFF_TYPE(x,y,c) = VZTR;
- }
- /*
- Function Name
- -------------
- Void updateState(Int x, Int y, Int type)
- Arguments
- ---------
- Int x, Int y - Index of wavelet coefficient (row, col) to mark.
- Description
- -----------
- Update the state of current coefficient.
- Functions Called
- ----------------
- none
- Return Value
- ------------
- none
- Source File
- -----------
- QMUtils.c
- */
- Void CVTCCommon::updateState(Int x, Int y, Int type, Int c)
- {
- switch(COEFF_STATE(x,y,c))
- {
- case S_INIT:
- case S_ZTR:
- case S_ZTR_D:
- switch (type)
- {
- case ZTR_D:
- COEFF_STATE(x,y,c) = S_ZTR_D;
- break;
- case ZTR:
- COEFF_STATE(x,y,c) = S_ZTR;
- break;
- case VZTR:
- COEFF_STATE(x,y,c) = S_VZTR;
- break;
- case IZ:
- COEFF_STATE(x,y,c) = S_IZ;
- break;
- case VAL:
- COEFF_STATE(x,y,c) = S_VAL;
- break;
- default:
- errorHandler("updateState: type %d for state %d is invalid.",
- type, COEFF_STATE(x,y,c));
- }
- break;
- case S_IZ:
- switch (type)
- {
- case IZ:
- COEFF_STATE(x,y,c) = S_IZ;
- break;
- case VAL:
- COEFF_STATE(x,y,c) = S_VAL;
- break;
- default:
- errorHandler("updateState: type %d for state %d is invalid.",
- type, COEFF_STATE(x,y,c));
- }
- break;
- case S_VZTR:
- switch (type)
- {
- case VZTR:
- COEFF_STATE(x,y,c) = S_VZTR;
- break;
- case VAL:
- COEFF_STATE(x,y,c) = S_VAL;
- break;
- default:
- errorHandler("updateState: type %d for state %d is invalid.",
- type, COEFF_STATE(x,y,c));
- }
- break;
- case S_LINIT:
- case S_LZTR:
- case S_LZTR_D:
- switch (type)
- {
- case ZTR_D:
- COEFF_STATE(x,y,c) = S_LZTR_D;
- break;
- case ZTR:
- COEFF_STATE(x,y,c) = S_LZTR;
- break;
- case VZTR:
- COEFF_STATE(x,y,c) = S_LVZTR;
- break;
- default:
- errorHandler("updateState: type %d for state %d is invalid.",
- type, COEFF_STATE(x,y,c));
- }
- break;
- case S_DC:
- case S_VAL:
- case S_LVZTR:
- break;
- default:
- errorHandler("updateState: state %d is invalid.", COEFF_STATE(x,y,c));
- }
- }
- /*
- Function Name
- -------------
- Void updateCoeffAndDescState(Int x, Int y)
- Arguments
- ---------
- Int x, Int y - Index of wavelet coefficient (row, col) to mark.
- Description
- -----------
- Update the state of coefficient at (x,y) and all of it's descendents.
- Uses recursion to accomplish this.
- Functions Called
- ----------------
- findChild
- updateCoeffAndDescState (recursive call)
- updateState
- Return Value
- ------------
- none.
- Source File
- -----------
- QMUtils.c
- */
- Void CVTCCommon::updateCoeffAndDescState(Int x, Int y, Int c)
- {
- Int i;
- Int xc[4], yc[4]; /* coords of children */
- Int nc; /* number of children */
- /* Are we at a leaf? */
- if ((nc = findChild(x, y, xc, yc, c)) > 0)
- {
- /* No - mark descendents in all branches */
- for (i = 0; i < nc; ++i)
- updateCoeffAndDescState(xc[i], yc[i], c);
- }
- /* Updates state in coeffTable */
- updateState(x, y, COEFF_TYPE(x, y, c), c);
- }
- /*
- Function Name
- -------------
- Void spatialLayerChangeUpdate()
- Arguments
- ---------
- none.
- Description
- -----------
- Update the state of leaf coefficients when the spatial layer changes.
- Call right *after* spatial layer has increased. It is assummed that
- the increase was a doubling of the size (three more AC bands).
- Functions Called
- ----------------
- none.
- Return Value
- ------------
- none.
- Source File
- -----------
- QMUtils.c
- */
- Void CVTCCommon::spatialLayerChangeUpdate(Int c)
- {
- Int x, y;
- Int oldWidth, oldHeight;
- Int xLeafStart, yLeafStart;
- noteDetail("Updating new coefficients in spatial layer for col %d....",c);
- oldWidth = mzte_codec.m_spaLayerWidth[mzte_codec.m_iCurSpatialLev][c]>>1;
- oldHeight = mzte_codec.m_spaLayerHeight[mzte_codec.m_iCurSpatialLev][c]>>1;
- xLeafStart = mzte_codec.m_spaLayerWidth[mzte_codec.m_iCurSpatialLev-1][c]>>1;
- yLeafStart = mzte_codec.m_spaLayerHeight[mzte_codec.m_iCurSpatialLev-1][c]>>1;
- /* loop through leaf coefficients */
- /* HL */
- for (y = 0; y < yLeafStart; ++y)
- for (x = xLeafStart; x < oldWidth; ++x)
- /* update state */
- switch (COEFF_STATE(x,y,c))
- {
- case S_LVZTR:
- COEFF_STATE(x,y,c) = S_VZTR;
- break;
- case S_LZTR:
- COEFF_STATE(x,y,c) = S_ZTR;
- break;
- case S_LZTR_D:
- COEFF_STATE(x,y,c) = S_ZTR_D;
- break;
- case S_LINIT:
- COEFF_STATE(x,y,c) = S_INIT;
- break;
- default:
- errorHandler("Non-leaf state (%d) for leaf coefficient at"
- "(x=%d, y=%d).",
- COEFF_STATE(x, y,c), x, y);
- }
- /* LH */
- for (y = yLeafStart; y < oldHeight; ++y)
- for (x = 0; x < xLeafStart; ++x)
- /* update state */
- switch (COEFF_STATE(x,y,c))
- {
- case S_LVZTR:
- COEFF_STATE(x,y,c) = S_VZTR;
- break;
- case S_LZTR:
- COEFF_STATE(x,y,c) = S_ZTR;
- break;
- case S_LZTR_D:
- COEFF_STATE(x,y,c) = S_ZTR_D;
- break;
- case S_LINIT:
- COEFF_STATE(x,y,c) = S_INIT;
- break;
- default:
- errorHandler("Non-leaf state (%d) for leaf coefficient at"
- "(x=%d, y=%d).",
- COEFF_STATE(x, y,c), x, y);
- }
- /* HH */
- for (y = yLeafStart; y < oldHeight; ++y)
- for (x = xLeafStart; x < oldWidth; ++x)
- /* update state */
- switch (COEFF_STATE(x,y,c))
- {
- case S_LVZTR:
- COEFF_STATE(x,y,c) = S_VZTR;
- break;
- case S_LZTR:
- COEFF_STATE(x,y,c) = S_ZTR;
- break;
- case S_LZTR_D:
- COEFF_STATE(x,y,c) = S_ZTR_D;
- break;
- case S_LINIT:
- COEFF_STATE(x,y,c) = S_INIT;
- break;
- default:
- errorHandler("Non-leaf state (%d) for leaf coefficient at"
- "(x=%d, y=%d).",
- COEFF_STATE(x, y,c), x, y);
- }
- noteDetail("Completed updating new coefficients in spatial layer.");
- }
- Int CVTCCommon::coordToSpatialLev(Int x, Int y, Int c)
- {
- Int k;
- for (k = 0; k < mzte_codec.m_iSpatialLev; ++k)
- if (x < mzte_codec.m_spaLayerWidth[k][c]
- && y < mzte_codec.m_spaLayerHeight[k][c])
- return k;
- return(0);
- }