?? text_code.c
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/**************************************************************************
* *
* This code is developed by Adam Li. This software is an *
* implementation of a part of one or more MPEG-4 Video tools as *
* specified in ISO/IEC 14496-2 standard. Those intending to use this *
* software module in hardware or software products are advised that its *
* use may infringe existing patents or copyrights, and any such use *
* would be at such party's own risk. The original developer of this *
* software module and his/her company, and subsequent editors and their *
* companies (including Project Mayo), will have no liability for use of *
* this software or modifications or derivatives thereof. *
* *
* Project Mayo gives users of the Codec a license to this software *
* module or modifications thereof for use in hardware or software *
* products claiming conformance to the MPEG-4 Video Standard as *
* described in the Open DivX license. *
* *
* The complete Open DivX license can be found at *
* http://www.projectmayo.com/opendivx/license.php . *
* *
**************************************************************************/
/**************************************************************************
*
* text_code.c
*
* Copyright (C) 2001 Project Mayo
*
* Adam Li
*
* DivX Advance Research Center <darc@projectmayo.com>
*
**************************************************************************/
/* This file contains some functions for text coding of image. */
/* Some codes of this project come from MoMuSys MPEG-4 implementation. */
/* Please see seperate acknowledgement file for a list of contributors. */
#include "text_defs.h"
#include "mot_code.h"
#include "bitstream.h"
#include "putvlc.h"
#include "mot_util.h"
#include "text_code_mb.h"
#include "text_code.h"
#define SKIPP 6
extern FILE *ftrace;
Void Bits_CountMB_combined ( Int DQUANT,
Int Mode,
Int COD,
Int ACpred_flag,
Int CBP,
Int vop_type,
Bits *bits,
Image *mottext_bitstream,
Int *MB_transp_pattern
);
Int doDCACpred ( Int *qcoeff,
Int *CBP,
Int ncoeffs,
Int x_pos,
Int y_pos,
Int ***DC_store,
Int QP,
Int MB_width,
Int direction[],
Int mid_grey
);
Void nullfill(Int pred[], Int mid_grey);
Int Idir_c(Int val, Int QP);
Int IntraDCSwitch_Decision _P_(( Int Mode,
Int intra_dc_vlc_thr,
Int Qp
));
Int FindCBP _P_(( Int *qcoeff,
Int Mode,
Int ncoeffs
));
/***********************************************************CommentBegin******
*
* -- VopCodeShapeTextIntraCom --Intra texture encoding of one vop,
* Combined shape/(motion)/texture mode
*
* Purpose :
* Intra texture encoding of one vop (combined shape/(mot)/text mode)
*
* Arguments in :
* Vop curr : the current vop to be coded
* Int intra_dcpred_disable : disable intradc prediction
* Image* AB_SizeConversionDecisions:
* Image* AB_first_MMR_values
* VolConfig *vol_config : configuration information
* Int rc_type : rate control type:
*
* Arguments out :
* Vop *rec_curr : the reconstructed current vop
* Image *texture_bitstream : the output bitstream
* Bits : statistics information
*
* Description :
* This function performs Intra texture encoding of one vop.
*
***********************************************************CommentEnd********/
Void VopCodeShapeTextIntraCom(Vop *curr,
Vop *rec_curr, Image *mottext_bitstream)
{
Int QP = GetVopIntraQuantizer(curr);
Int Mode = MODE_INTRA;
Int* qcoeff;
Int i, j;
Int CBP, COD;
Int CBPY, CBPC;
Int num_pixels = GetImageSizeX(GetVopY(curr));
Int num_lines = GetImageSizeY(GetVopY(curr));
Int vop_type;
Int ***DC_store;
Int MB_width = num_pixels / MB_SIZE;
Int MB_height = num_lines / MB_SIZE;
Int m;
Int ACpred_flag=-1;
Int direction[6];
Int switched=0;
Int DQUANT =0;
Bits nbits, *bits;
bits = &nbits;
qcoeff = (Int *) malloc (sizeof (Int) * 384);
#ifdef _RC_DEBUG_
fprintf(ftrace, "RC - VopCodeShapeTextIntraCom(): ---> CODING WITH: %d \n",QP);
#endif
for (i = 0; i < 6; i++)
direction[i] = 0;
/* allocate space for 3D matrix to keep track of prediction values
for DC/AC prediction */
DC_store = (Int ***)calloc(MB_width*MB_height, sizeof(Int **));
for (i = 0; i < MB_width*MB_height; i++)
{
DC_store[i] = (Int **)calloc(6, sizeof(Int *));
for (j = 0; j < 6; j++)
DC_store[i][j] = (Int *)calloc(15, sizeof(Int));
}
Bits_Reset (bits);
vop_type = PCT_INTRA;
for (j = 0; j < num_lines/MB_SIZE; j++) /* Macro Block loop */
{
for (i = 0; i < num_pixels/MB_SIZE; i++)
{
DQUANT = 0;
COD = 0;
bits->no_intra++;
CodeMB (curr, rec_curr, NULL, i*MB_SIZE, j*MB_SIZE,
num_pixels, QP+DQUANT, MODE_INTRA, qcoeff);
m =0;
DC_store[j*MB_width+i][0][m] = qcoeff[m]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_width+i][1][m] = qcoeff[m+64]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_width+i][2][m] = qcoeff[m+128]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_width+i][3][m] = qcoeff[m+192]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_width+i][4][m] = qcoeff[m+256]*cal_dc_scaler(QP+DQUANT,2);
DC_store[j*MB_width+i][5][m] = qcoeff[m+320]*cal_dc_scaler(QP+DQUANT,2);
for (m = 1; m < 8; m++)
{
DC_store[j*MB_width+i][0][m] = qcoeff[m];
DC_store[j*MB_width+i][1][m] = qcoeff[m+64];
DC_store[j*MB_width+i][2][m] = qcoeff[m+128];
DC_store[j*MB_width+i][3][m] = qcoeff[m+192];
DC_store[j*MB_width+i][4][m] = qcoeff[m+256];
DC_store[j*MB_width+i][5][m] = qcoeff[m+320];
}
for (m = 0; m < 7; m++)
{
DC_store[j*MB_width+i][0][m+8] = qcoeff[(m+1)*8];
DC_store[j*MB_width+i][1][m+8] = qcoeff[(m+1)*8+64];
DC_store[j*MB_width+i][2][m+8] = qcoeff[(m+1)*8+128];
DC_store[j*MB_width+i][3][m+8] = qcoeff[(m+1)*8+192];
DC_store[j*MB_width+i][4][m+8] = qcoeff[(m+1)*8+256];
DC_store[j*MB_width+i][5][m+8] = qcoeff[(m+1)*8+320];
}
CBP = FindCBP(qcoeff,Mode,64);
/* Do the DC/AC prediction, changing the qcoeff values as
appropriate */
if (GetVopIntraACDCPredDisable(curr) == 0)
{
ACpred_flag = doDCACpred(qcoeff, &CBP, 64, i, j, DC_store,
QP+DQUANT, MB_width,
direction,GetVopMidGrey(curr));
}
else
ACpred_flag = -1;
switched = IntraDCSwitch_Decision(Mode,
GetVopIntraDCVlcThr(curr),
QP);
if (switched)
CBP = FindCBP(qcoeff,MODE_INTER,64);
if (DQUANT) Mode=MODE_INTRA_Q;else Mode=MODE_INTRA;
QP+=DQUANT;
CBPY = CBP >> 2;
CBPY = CBPY & 15; /* last 4 bits */
CBPC = CBP & 3; /* last 2 bits */
Bits_CountMB_combined (DQUANT, Mode, COD, ACpred_flag, CBP,
vop_type,
bits, mottext_bitstream,/*MB_transp_pattern*/NULL);
/* added the variable intra_dcpred_diable */
MB_CodeCoeff(bits, qcoeff, Mode, CBP, 64,
GetVopIntraACDCPredDisable(curr),
NULL, mottext_bitstream,
/*MB_transp_pattern*/NULL, direction,
1 /*GetVopErrorResDisable(curr)*/,
0 /*GetVopReverseVlc(curr)*/,
switched,
0 /*curr->alternate_scan*/);
}
}
/* Free allocated memory for 3D matrix */
for (i = 0; i < MB_width*MB_height; i++)
{
for (j = 0; j < 6; j++)
free(DC_store[i][j]);
free(DC_store[i]);
}
free(DC_store);
free ((Char*)qcoeff);
}
/***********************************************************CommentBegin******
*
* -- VopShapeMotText -- Combined Inter encoding of shape motion and texture
*
* Purpose :
* Combined Inter encoding of texture and motion.
* Used by VopCodeMotTextInter
*
* Arguments in :
* Vop *curr : the current vop to be encoded
* Vop *rec_prev: the previous reconstructed vop
* Image *mot_x : the x-coordinates of the motion vectors
* Image *mot_y : the y-coordinates of the motion vectors
* Image *MB_decisions: Contains for each macroblock the encoding mode
* Int f_code_for: MV search range 1/2 pel: 1=32,2=64,...,7=2048
* Image* AB_SizeConversionDecisions:
* Image* AB_first_MMR_values :
* Int intra_dcpred_disable : disable the intra dc prediction
* VolConfig *vol_config : configuration information
* Int rc_type : rate control type
*
* Arguments out :
* Vop *rec_curr : the reconstructed current vop
* Image *mottext_bitstream : the output texture/motion bitstream
* Bits *bits : Coding statistics
*
***********************************************************CommentEnd********/
Void VopShapeMotText (Vop *curr, Vop *comp,
Image *MB_decisions, Image *mot_x, Image *mot_y,
Int f_code_for,
Int intra_acdc_pred_disable,
Vop *rec_curr,
Image *mottext_bitstream
)
{
Int Mode=0;
Int QP = GetVopQuantizer(curr);
Int* qcoeff=NULL;
Int i, j;
Int CBP;
Int COD;
Int CBPY, CBPC;
Int MB_in_width, MB_in_height, B_in_width, mbnum, boff;
SInt p;
SInt *ptr=NULL;
Float *motx_ptr=NULL, *moty_ptr=NULL;
Int num_pixels;
Int num_lines;
Int vop_type=PCT_INTER;
Int ***DC_store=NULL;
Int m, n;
Int ACpred_flag=-1;
Int direction[6];
Int switched=0;
Int DQUANT=0;
Bits nbits, *bits;
bits = &nbits;
qcoeff = (Int *) malloc (sizeof (Int) * 384);
num_pixels = GetImageSizeX(GetVopY(curr));
num_lines = GetImageSizeY(GetVopY(curr));
MB_in_width = num_pixels / MB_SIZE;
MB_in_height = num_lines / MB_SIZE;
B_in_width = 2 * MB_in_width;
for (i = 0; i < 6; i++) direction[i] = 0;
#ifdef _RC_DEBUG_
printf("RC - VopShapeMotText(): ---> CODING WITH: %d \n",QP);
#endif
/* allocate space for 3D matrix to keep track of prediction values
for DC/AC prediction */
DC_store = (Int ***)calloc(MB_in_width*MB_in_height,
sizeof(Int **));
for (i = 0; i < MB_in_width*MB_in_height; i++)
{
DC_store[i] = (Int **)calloc(6, sizeof(Int *));
for (j = 0; j < 6; j++)
DC_store[i][j] = (Int *)calloc(15, sizeof(Int));
}
Bits_Reset (bits);
vop_type = PCT_INTER;
ptr = (SInt *) GetImageData(MB_decisions);
motx_ptr = (Float *) GetImageData(mot_x);
moty_ptr = (Float *) GetImageData(mot_y);
for (j = 0; j < num_lines/MB_SIZE; j++)
{
for (i = 0; i < MB_in_width; i++)
{
switched=0;
p = *ptr;
DQUANT = 0;
/* Fill DC_store with default coeff values */
for (m = 0; m < 6; m++)
{
DC_store[j*MB_in_width+i][m][0] = GetVopMidGrey(curr)*8;
for (n = 1; n < 15; n++)
DC_store[j*MB_in_width+i][m][n] = 0;
}
switch (p)
{
case MBM_INTRA:
Mode = (DQUANT == 0) ? MODE_INTRA : MODE_INTRA_Q;
bits->no_intra++;
break;
case MBM_INTER16:
Mode = (DQUANT == 0) ? MODE_INTER : MODE_INTER_Q;
bits->no_inter++;
break;
case MBM_INTER8:
Mode = MODE_INTER4V;
bits->no_inter4v++;
DQUANT = 0; /* Can't change QP for 8x8 mode */
break;
default:
printf("invalid MB_decision value :%d\n", p);
exit(0);
}
CodeMB (curr, rec_curr, comp, i*MB_SIZE, j*MB_SIZE,
num_pixels, QP + DQUANT, Mode, qcoeff);
mbnum = j*MB_in_width + i;
boff = (2 * (mbnum / MB_in_width) * B_in_width
+ 2 * (mbnum % MB_in_width));
CBP = FindCBP(qcoeff,Mode,64);
if ((CBP == 0) && (p == 1) && (*(motx_ptr +boff) == 0.0)
&& (*(moty_ptr +boff) == 0.0))
{
COD = 1; /* skipped macroblock */
BitstreamPutBits(mottext_bitstream, (long) (COD), 1L);
bits->COD ++;
*ptr = SKIPP;
Mode = MODE_INTER;
}
else
{
COD = 0; /* coded macroblock */
if ((Mode == MODE_INTRA) || (Mode == MODE_INTRA_Q))
{
/* Store the qcoeff-values needed later for prediction */
m =0;
DC_store[j*MB_in_width+i][0][m] = qcoeff[m]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_in_width+i][1][m] = qcoeff[m+64]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_in_width+i][2][m] = qcoeff[m+128]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_in_width+i][3][m] = qcoeff[m+192]*cal_dc_scaler(QP+DQUANT,1);
DC_store[j*MB_in_width+i][4][m] = qcoeff[m+256]*cal_dc_scaler(QP+DQUANT,2);
DC_store[j*MB_in_width+i][5][m] = qcoeff[m+320]*cal_dc_scaler(QP+DQUANT,2);
for (m = 1; m < 8; m++)
{
DC_store[j*MB_in_width+i][0][m] = qcoeff[m];
DC_store[j*MB_in_width+i][1][m] = qcoeff[m+64];
DC_store[j*MB_in_width+i][2][m] = qcoeff[m+128];
DC_store[j*MB_in_width+i][3][m] = qcoeff[m+192];
DC_store[j*MB_in_width+i][4][m] = qcoeff[m+256];
DC_store[j*MB_in_width+i][5][m] = qcoeff[m+320];
}
for (m = 0; m < 7; m++)
{
DC_store[j*MB_in_width+i][0][m+8] = qcoeff[(m+1)*8];
DC_store[j*MB_in_width+i][1][m+8] = qcoeff[(m+1)*8+64];
DC_store[j*MB_in_width+i][2][m+8] = qcoeff[(m+1)*8+128];
DC_store[j*MB_in_width+i][3][m+8] = qcoeff[(m+1)*8+192];
DC_store[j*MB_in_width+i][4][m+8] = qcoeff[(m+1)*8+256];
DC_store[j*MB_in_width+i][5][m+8] = qcoeff[(m+1)*8+320];
}
if (intra_acdc_pred_disable == 0)
ACpred_flag = doDCACpred(qcoeff, &CBP, 64, i, j,
DC_store,
QP+DQUANT, MB_in_width,
direction,GetVopMidGrey(curr));
else
ACpred_flag = -1; /* Not to go into bitstream */
}
switched = IntraDCSwitch_Decision(Mode,
GetVopIntraDCVlcThr(curr),
QP);
if (switched)
CBP = FindCBP(qcoeff,MODE_INTER,64);
CBPY = CBP >> 2;
CBPY = CBPY & 15; /* last 4 bits */
CBPC = CBP & 3; /* last 2 bits */
Bits_CountMB_combined (DQUANT, Mode, COD, ACpred_flag, CBP,
vop_type, bits,
mottext_bitstream,/*MB_transp_pattern*/NULL);
Bits_CountMB_Motion( mot_x, mot_y, NULL,
MB_decisions, i, j, f_code_for, 0 /*quarter_pel*/,
mottext_bitstream,
1 /*GetVopErrorResDisable(curr)*/, 0,
(Int **)NULL, 0 /*GetVopShape(curr)*/);
MB_CodeCoeff(bits, qcoeff, Mode, CBP, 64,
intra_acdc_pred_disable,
NULL, mottext_bitstream,
/*MB_transp_pattern*/NULL, direction,
1/*GetVopErrorResDisable(curr)*/,
0/*GetVopReverseVlc(curr)*/,
switched,
0 /*curr->alternate_scan*/);
}
ptr++;
} /* for i loop */
} /* for j loop */
/* Free allocated memory for 3D matrix */
for (i = 0; i < MB_in_width*MB_in_height; i++)
{
for (j = 0; j < 6; j++)
free(DC_store[i][j]);
free(DC_store[i]);
}
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