/*************************************************************************
UpdateModelMB : update adaptive model at end of macroblock
(for lowest resolution only)
*************************************************************************/
private static void UpdateModelMB(COLORFORMAT cf, int iChannels, int[] iLaplacianMean,
CAdaptiveModel pModel)
{
iLaplacianMean[0] *= Constant.aWeight0[pModel.m_band - CAdaptiveModel.BAND.BAND_DC];
if (cf == COLORFORMAT.YUV_420)
{
iLaplacianMean[1] *= Constant.aWeight2[pModel.m_band - CAdaptiveModel.BAND.BAND_DC];
}
else if (cf == COLORFORMAT.YUV_422)
{
iLaplacianMean[1] *= Constant.aWeight2[3 + (pModel.m_band) - CAdaptiveModel.BAND.BAND_DC];
}
else
{
iLaplacianMean[1] *= Constant.aWeight1[pModel.m_band - CAdaptiveModel.BAND.BAND_DC][iChannels - 1];
if (pModel.m_band == CAdaptiveModel.BAND.BAND_AC)
iLaplacianMean[1] >>= 4;
}
for (int j = 0; j < 2; j++)
{
int iLM = iLaplacianMean[j];
int iMS = pModel.m_iFlcState[j];
int iDelta = (iLM - Constant.MODELWEIGHT) >> 2;
if (iDelta <= -8)
{
iDelta += 4;
if (iDelta < -16)
iDelta = -16;
iMS += iDelta;
if (iMS < -8)
{
if (pModel.m_iFlcBits[j] == 0)
iMS = -8;
else
{
iMS = 0;
pModel.m_iFlcBits[j]--;
}
}
}
else if (iDelta >= 8)
{
iDelta -= 4;
if (iDelta > 15)
iDelta = 15;
iMS += iDelta;
if (iMS > 8)
{
if (pModel.m_iFlcBits[j] >= 15)
{
pModel.m_iFlcBits[j] = 15;
iMS = 8;
}
else
{
iMS = 0;
pModel.m_iFlcBits[j]++;
}
}
}
pModel.m_iFlcState[j] = iMS;
if (cf == COLORFORMAT.Y_ONLY)
break;
}
}
/*************************************************************************
UpdateModelMB : update adaptive model at end of macroblock
(for lowest resolution only)
*************************************************************************/
private static void UpdateModelMB(int[] iLaplacianMean, CAdaptiveModel pModel)
{
iLaplacianMean[0] *= Constant.aWeight0[pModel.m_band - CAdaptiveModel.BAND.BAND_DC];
iLaplacianMean[1] *= Constant.aWeight1[pModel.m_band - CAdaptiveModel.BAND.BAND_DC][0];
if (pModel.m_band == CAdaptiveModel.BAND.BAND_AC)
{
iLaplacianMean[1] >>= 4;
}
int j = 0;
int iLM = iLaplacianMean[j];
int iMS = pModel.m_iFlcState[j];
int iDelta = (iLM - Constant.MODELWEIGHT) >> 2;
if (iDelta <= -8)
{
iDelta += 4;
if (iDelta < -16)
iDelta = -16;
iMS += iDelta;
if (iMS < -8) {
if (pModel.m_iFlcBits[j] == 0)
iMS = -8;
else {
iMS = 0;
pModel.m_iFlcBits[j]--;
}
}
}
else if (iDelta >= 8)
{
iDelta -= 4;
if (iDelta > 15)
iDelta = 15;
iMS += iDelta;
if (iMS > 8) {
if (pModel.m_iFlcBits[j] >= 15)
{
pModel.m_iFlcBits[j] = 15;
iMS = 8;
}
else
{
iMS = 0;
pModel.m_iFlcBits[j]++;
}
}
}
pModel.m_iFlcState[j] = iMS;
}
