text_code.c

<VC++视频音频开发>一书的光盘资料。

#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
	));
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;
	
	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++)		  
	{
		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);
			
			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;			  
			CBPC = CBP & 3;				  
			Bits_CountMB_combined (DQUANT, Mode, COD, ACpred_flag, CBP,
				vop_type,
				bits, mottext_bitstream,NULL);
			
			MB_CodeCoeff(bits, qcoeff, Mode, CBP, 64,
				GetVopIntraACDCPredDisable(curr),
				NULL, mottext_bitstream,
				NULL, direction,
				1 ,
				0 ,
				switched,
				0 );
		}
	}
	
	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);
}
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
	
	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;
			
			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;				  
					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;				  
				BitstreamPutBits(mottext_bitstream, (long) (COD), 1L);
				bits->COD ++;
				*ptr = SKIPP;
				Mode = MODE_INTER;
			}
			else
			{
				COD = 0;				  
				if ((Mode == MODE_INTRA) || (Mode == MODE_INTRA_Q))
				{
					
					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;  
				}
				switched = IntraDCSwitch_Decision(Mode,
					GetVopIntraDCVlcThr(curr),
					QP);
				if (switched)
					CBP = FindCBP(qcoeff,MODE_INTER,64);
				CBPY = CBP >> 2;
				CBPY = CBPY & 15;		  
				CBPC = CBP & 3;			  
				Bits_CountMB_combined (DQUANT, Mode, COD, ACpred_flag, CBP,
					vop_type, bits,
					mottext_bitstream,NULL);
				Bits_CountMB_Motion( mot_x, mot_y, NULL, 
					MB_decisions, i, j, f_code_for, 0 ,
					mottext_bitstream,
					1 , 0,
					(Int **)NULL, 0 );
				MB_CodeCoeff(bits, qcoeff, Mode, CBP, 64,
					intra_acdc_pred_disable,
					NULL, mottext_bitstream,
					NULL, direction,
					1,
					0,
					switched,
					0 );
			}
			ptr++;
		} 
	} 
	
	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]);
	}