OMXResult omxVCM4P2_QuantInvInter_I(
OMX_S16 * pSrcDst,
OMX_INT QP
)
{
OMX_INT coeffCount, Sign;
/* Argument error checks */
armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
/* Second Inverse quantisation method */
for (coeffCount = 0; coeffCount < 64; coeffCount++)
{
/* check sign */
Sign = armSignCheck (pSrcDst[coeffCount]);
/* Quantize the coeff */
if (QP & 0x1)
{
pSrcDst[coeffCount] = (2* armAbs(pSrcDst[coeffCount]) + 1) * QP;
pSrcDst[coeffCount] *= Sign;
}
else
{
pSrcDst[coeffCount] = (2* armAbs(pSrcDst[coeffCount]) + 1)
* QP - 1;
pSrcDst[coeffCount] *= Sign;
}
/* Saturate */
pSrcDst[coeffCount] = armClip (-2048, 2047, pSrcDst[coeffCount]);
}
return OMX_Sts_NoErr;
}
OMXResult omxVCM4P2_QuantInter_I(
OMX_S16 * pSrcDst,
OMX_U8 QP,
OMX_INT shortVideoHeader
)
{
/* Definitions and Initializations*/
OMX_INT coeffCount;
OMX_INT fSign;
OMX_INT maxClpAC = 0, minClpAC = 0;
OMX_INT maxClpDC = 0, minClpDC = 0;
/* Argument error checks */
armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
/* One argument check is delayed until we have ascertained that */
/* pQMatrix is not NULL. */
/* Set the Clip Range based on SVH on/off */
if(shortVideoHeader == 1)
{
maxClpDC = 254;
minClpDC = 1;
maxClpAC = 127;
minClpAC = -127;
}
else
{
maxClpDC = 2047;
minClpDC = -2047;
maxClpAC = 2047;
minClpAC = -2047;
}
/* Second Inverse quantisation method */
for (coeffCount = 0; coeffCount < 64; coeffCount++)
{
fSign = armSignCheck (pSrcDst[coeffCount]);
pSrcDst[coeffCount] = (armAbs(pSrcDst[coeffCount])
- (QP/2))/(2 * QP);
pSrcDst[coeffCount] *= fSign;
/* Clip */
if (coeffCount == 0)
{
pSrcDst[coeffCount] =
(OMX_S16) armClip (minClpDC, maxClpDC, pSrcDst[coeffCount]);
}
else
{
pSrcDst[coeffCount] =
(OMX_S16) armClip (minClpAC, maxClpAC, pSrcDst[coeffCount]);
}
}
return OMX_Sts_NoErr;
}
OMXResult omxVCM4P2_QuantIntra_I(
OMX_S16 * pSrcDst,
OMX_U8 QP,
OMX_INT blockIndex,
OMX_INT shortVideoHeader
)
{
/* Definitions and Initializations*/
/* Initialized to remove compilation error */
OMX_INT dcScaler = 0, coeffCount,fSign;
OMX_INT maxClpAC, minClpAC;
/* Argument error checks */
armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(((blockIndex < 0) || (blockIndex >= 10)), OMX_Sts_BadArgErr);
armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
/* One argument check is delayed until we have ascertained that */
/* pQMatrix is not NULL. */
/* Set the Clip Range based on SVH on/off */
if(shortVideoHeader == 1)
{
maxClpAC = 127;
minClpAC = -127;
dcScaler = 8;
/* Dequant the DC value, this applies to both the methods */
pSrcDst[0] = armIntDivAwayFromZero (pSrcDst[0], dcScaler);
/* Clip between 1 and 254 */
pSrcDst[0] = (OMX_S16) armClip (1, 254, pSrcDst[0]);
}
else
{
maxClpAC = 2047;
minClpAC = -2047;
/* Calculate the DC scaler value */
if ((blockIndex < 4) || (blockIndex > 5))
{
if (QP >= 1 && QP <= 4)
{
dcScaler = 8;
}
else if (QP >= 5 && QP <= 8)
{
dcScaler = 2 * QP;
}
else if (QP >= 9 && QP <= 24)
{
dcScaler = QP + 8;
}
else
{
dcScaler = (2 * QP) - 16;
}
}
else if (blockIndex < 6)
{
if (QP >= 1 && QP <= 4)
{
dcScaler = 8;
}
else if (QP >= 5 && QP <= 24)
{
dcScaler = (QP + 13)/2;
}
else
{
dcScaler = QP - 6;
}
}
/* Dequant the DC value, this applies to both the methods */
pSrcDst[0] = armIntDivAwayFromZero (pSrcDst[0], dcScaler);
}
/* Second Inverse quantisation method */
for (coeffCount = 1; coeffCount < 64; coeffCount++)
{
fSign = armSignCheck (pSrcDst[coeffCount]);
pSrcDst[coeffCount] = armAbs(pSrcDst[coeffCount])/(2 * QP);
pSrcDst[coeffCount] *= fSign;
/* Clip */
pSrcDst[coeffCount] =
(OMX_S16) armClip (minClpAC, maxClpAC, pSrcDst[coeffCount]);
}
return OMX_Sts_NoErr;
}
OMXResult omxVCM4P2_QuantInvIntra_I(
OMX_S16 * pSrcDst,
OMX_INT QP,
OMXVCM4P2VideoComponent videoComp,
OMX_INT shortVideoHeader
)
{
/* Initialized to remove compilation error */
OMX_INT dcScaler = 0, coeffCount, Sign;
/* Argument error checks */
armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr);
armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr);
armRetArgErrIf(((videoComp != OMX_VC_LUMINANCE) && (videoComp != OMX_VC_CHROMINANCE)), OMX_Sts_BadArgErr);
/* Calculate the DC scaler value */
/* linear intra DC mode */
if(shortVideoHeader)
{
dcScaler = 8;
}
/* nonlinear intra DC mode */
else
{
if (videoComp == OMX_VC_LUMINANCE)
{
if (QP >= 1 && QP <= 4)
{
dcScaler = 8;
}
else if (QP >= 5 && QP <= 8)
{
dcScaler = 2 * QP;
}
else if (QP >= 9 && QP <= 24)
{
dcScaler = QP + 8;
}
else
{
dcScaler = (2 * QP) - 16;
}
}
else if (videoComp == OMX_VC_CHROMINANCE)
{
if (QP >= 1 && QP <= 4)
{
dcScaler = 8;
}
else if (QP >= 5 && QP <= 24)
{
dcScaler = (QP + 13)/2;
}
else
{
dcScaler = QP - 6;
}
}
}
/* Dequant the DC value, this applies to both the methods */
pSrcDst[0] = pSrcDst[0] * dcScaler;
/* Saturate */
pSrcDst[0] = armClip (-2048, 2047, pSrcDst[0]);
/* Second Inverse quantisation method */
for (coeffCount = 1; coeffCount < 64; coeffCount++)
{
/* check sign */
Sign = armSignCheck (pSrcDst[coeffCount]);
if (QP & 0x1)
{
pSrcDst[coeffCount] = (2* armAbs(pSrcDst[coeffCount]) + 1) * QP;
pSrcDst[coeffCount] *= Sign;
}
else
{
pSrcDst[coeffCount] =
(2* armAbs(pSrcDst[coeffCount]) + 1) * QP - 1;
pSrcDst[coeffCount] *= Sign;
}
/* Saturate */
pSrcDst[coeffCount] = armClip (-2048, 2047, pSrcDst[coeffCount]);
}
return OMX_Sts_NoErr;
}