Int CVTCCommon::ztqInitDC(Int decode, Int c)
{
Int err;
Int x, y;
Int dummyPrevQ;
err = 0;
noteDetail("Initializing DC coefficient information....");
noteDebug("DC Dimensions: Width=%d, Height=%d",
mzte_codec.m_iDCWidth, mzte_codec.m_iDCHeight);
for (y = 0; y < mzte_codec.m_iDCHeight; ++y)
for (x = 0; x < mzte_codec.m_iDCWidth; ++x)
{
if (decode)
initInvQuantSingleStage(&COEFF_QSTATE(x, y, c), &dummyPrevQ);
else
initQuantSingleStage(&COEFF_QSTATE(x, y, c), &dummyPrevQ,
COEFF_ORGVAL(x,y,c));
COEFF_TYPE(x, y, c) = UNTYPED;
COEFF_STATE(x, y, c) = S_DC;
}
noteDetail("Completed initializing of DC coefficient information.");
return err;
}
// hjlee 0901
Int CVTCCommon::ztqInitAC(Int decode, Int c)
{
Int err;
Int x, y, xc[4], yc[4];
Int height, width;
Int dummyPrevQ;
err = 0;
noteDetail("Initializing AC coefficient information for col %d....",c);
height = mzte_codec.m_iHeight >> (int)(c!=0);
width = mzte_codec.m_iWidth >> (int)(c!=0);
noteDebug("Image: Width=%d, Height=%d", width, height);
for (y = 0; y < height; ++y)
for (x = 0; x < width; ++x)
{
if (x >= mzte_codec.m_iDCWidth || y >= mzte_codec.m_iDCHeight)
{
if (decode)
initInvQuantSingleStage(&COEFF_QSTATE(x, y, c), &dummyPrevQ);
else
{
initQuantSingleStage(&COEFF_QSTATE(x, y, c), &dummyPrevQ,
COEFF_ORGVAL(x,y,c));
}
COEFF_TYPE(x, y, c) = UNTYPED;
/* AC Bands */
if (findChild(x, y, xc, yc, c)==0 ||
x >= mzte_codec.m_SPlayer[c].width ||
y >= mzte_codec.m_SPlayer[c].height) /* leaf */
COEFF_STATE(x, y, c) = S_LINIT;
else
COEFF_STATE(x, y,c) = S_INIT;
}
}
noteDetail("Completed Initializing of AC coefficient information.");
return err;
}
Void CVTCEncoder::DC_predict(Int color)
{
Int i,j,dc_h,dc_w,offset_dc,max_dc;
dc_h=mzte_codec.m_iDCHeight;
dc_w=mzte_codec.m_iDCWidth;
dc_coeff=(SInt **)calloc(dc_h,sizeof(SInt *));
for(i=0;i<dc_h;i++)
dc_coeff[i]=(SInt *)calloc(dc_w,sizeof(SInt));
dc_mask=(Char **)calloc(dc_h,sizeof(Char *));
for(i=0;i<dc_h;i++)
dc_mask[i]=(Char *)calloc(dc_w,sizeof(Char));
coeffinfo=mzte_codec.m_SPlayer[color].coeffinfo;
for(i=0;i<dc_h;i++)
for(j=0;j<dc_w;j++) {
dc_coeff[i][j]=coeffinfo[i][j].quantized_value;
dc_mask [i][j]=coeffinfo[i][j].mask;
}
/* prediction */
offset_dc=0;
for(i=0;i<dc_h;i++)
for(j=0;j<dc_w;j++){
if ( dc_mask[i][j] != 0 ) {
if(offset_dc>(coeffinfo[i][j].quantized_value-=DC_pred_pix(i,j)))
offset_dc=coeffinfo[i][j].quantized_value;
}
}
if(offset_dc>0)
offset_dc=0;
/* adjust coeff's by offset_dc */
max_dc=0;
for(i=0;i<dc_h;i++)
for(j=0;j<dc_w;j++){
if ( dc_mask[i][j] != 0 ) {
coeffinfo[i][j].quantized_value -=offset_dc;
/* find max_dc */
if (max_dc<coeffinfo[i][j].quantized_value)
max_dc=coeffinfo[i][j].quantized_value;
}
}
mzte_codec.m_iOffsetDC=offset_dc;
mzte_codec.m_iMaxDC=max_dc; /* hjlee */
noteDebug("DC pred: offset=%d, max_dc=%d",
mzte_codec.m_iOffsetDC,mzte_codec.m_iMaxDC);
for(i=0;i<dc_h;i++) {
free(dc_coeff[i]);
free(dc_mask[i]);
}
free(dc_coeff);
free(dc_mask);
}
