internal PKPixelInfo(Guid pGUIDPixFmt, uint cChannel, COLORFORMAT cfColorFormat,
BITDEPTH_BITS bdBitDepth, uint cbitUnit, ulong grBit, uint uInterpretation,
uint uSamplePerPixel, uint uBitsPerSample, uint uSampleFormat)
{
this.pGUIDPixFmt = pGUIDPixFmt;
this.cChannel = cChannel;
this.cfColorFormat = cfColorFormat;
this.bdBitDepth = bdBitDepth;
this.cbitUnit = cbitUnit;
this.grBit = grBit;
this.uInterpretation = uInterpretation;
this.uSamplePerPixel = uSamplePerPixel;
this.uBitsPerSample = uBitsPerSample;
this.uSampleFormat = uSampleFormat;
}
private void ReadImagePlaneHeader(SimpleBitIO bitIO)
{
// internal color format
cfColorFormat = (COLORFORMAT)bitIO.GetBit32_SB(Constant.ColorFormatNumBits);
if (cfColorFormat != COLORFORMAT.Y_ONLY /* accept DEM only! */)
{
throw new ArgumentOutOfRangeException("bitIO", "cfColorFormat = " + cfColorFormat);
}
// lossless mode
bScaledArith = bitIO.GetBit32_SB(Constant.NoScaledFlagNumBits) == 1;
// subbands
sbSubband = (SUBBAND)bitIO.GetBit32_SB(Constant.BandsPresentNumBits);
if (sbSubband != SUBBAND.SB_ALL)
{
throw new ArgumentOutOfRangeException("bitIO", "sbSubband = " + sbSubband);
}
cNumChannels = 1;
bitIO.GetBit32_SB(8); // pSCP->nLenMantissaOrShift = (U8)GetBit32_SB(pSB, 8);
// quantization
uQPMode = 0;
// DC uniform
if (bitIO.GetBit32_SB(Constant.DCFrameUniformNumBits) == 1)
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexDC, bitIO) << 3;
}
else
{
uQPMode++;
}
if (sbSubband != SUBBAND.SB_DC_ONLY)
{
if (bitIO.GetBit32_SB(Constant.UseDCQuantizerNumBits) == 0)
{ // don't use DC QP
uQPMode += 0x200;
if (bitIO.GetBit32_SB(Constant.LPFrameUniformNumBits) == 1) // LP uniform
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexLP, bitIO) << 5;
}
else
{
uQPMode += 2;
}
}
else
{
uQPMode += ((uQPMode & 1) << 1) + ((uQPMode & 0x18) << 2);
}
if (sbSubband != SUBBAND.SB_NO_HIGHPASS)
{
if (bitIO.GetBit32_SB(Constant.UseLPQuantizerNumBits) == 0)
{ // don't use LP QP
uQPMode += 0x400;
if (bitIO.GetBit32_SB(Constant.HPFrameUniformNumBits) == 1) // HP uniform
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexHP, bitIO) << 7;
}
else
{
uQPMode += 4;
}
}
else
{
uQPMode += ((uQPMode & 2) << 1) + ((uQPMode & 0x60) << 2);
}
}
}
if (sbSubband == SUBBAND.SB_DC_ONLY)
{
uQPMode |= 0x200;
}
else
if (sbSubband == SUBBAND.SB_NO_HIGHPASS)
{
uQPMode |= 0x400;
}
if ((uQPMode & 0x600) == 0)
{
throw new ArgumentOutOfRangeException("bitIO", "Frame level QPs must be specified independently!");
}
bitIO.Flush();
}
/*************************************************************************
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;
}
}
/// <summary>
/// Reads header of FIRST PLANE only (p.39, HD Photo Bitstream Specification)
/// </summary>
/// <param name="bitIO">Stream to read the image plane header from</param>
private void ReadImagePlaneHeader(SimpleBitIO bitIO)
{
// internal color format
cfColorFormat = (COLORFORMAT)bitIO.GetBit32_SB(Constant.ColorFormatNumBits);
if (cfColorFormat != COLORFORMAT.Y_ONLY /* accept DEM only! */)
{
throw new ArgumentOutOfRangeException("bitIO", "cfColorFormat = " + cfColorFormat);
}
// lossless mode
bScaledArith = bitIO.GetBit32_SB(Constant.NoScaledFlagNumBits) == 1;
// subbands
sbSubband = (SUBBAND)bitIO.GetBit32_SB(Constant.BandsPresentNumBits);
if (sbSubband != SUBBAND.SB_ALL)
{
throw new ArgumentOutOfRangeException("bitIO", "sbSubband = " + sbSubband);
}
cNumChannels = 1;
bitIO.GetBit32_SB(8);// pSCP->nLenMantissaOrShift = (U8)GetBit32_SB(pSB, 8);
// quantization
uQPMode = 0;
// DC uniform
if (bitIO.GetBit32_SB(Constant.DCFrameUniformNumBits) == 1)
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexDC, bitIO) << 3;
}
else
{
uQPMode++;
}
if (sbSubband != SUBBAND.SB_DC_ONLY)
{
if (bitIO.GetBit32_SB(Constant.UseDCQuantizerNumBits) == 0)
{ // don't use DC QP
uQPMode += 0x200;
if (bitIO.GetBit32_SB(Constant.LPFrameUniformNumBits) == 1) // LP uniform
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexLP, bitIO) << 5;
}
else
{
uQPMode += 2;
}
}
else
{
uQPMode += ((uQPMode & 1) << 1) + ((uQPMode & 0x18) << 2);
}
if (sbSubband != SUBBAND.SB_NO_HIGHPASS)
{
if (bitIO.GetBit32_SB(Constant.UseLPQuantizerNumBits) == 0)
{ // don't use LP QP
uQPMode += 0x400;
if (bitIO.GetBit32_SB(Constant.HPFrameUniformNumBits) == 1) // HP uniform
{
uQPMode += (uint)BitstreamDecoder.ReadQuantizerSB(out uiQPIndexHP, bitIO) << 7;
}
else
{
uQPMode += 4;
}
}
else
{
uQPMode += ((uQPMode & 2) << 1) + ((uQPMode & 0x60) << 2);
}
}
}
if (sbSubband == SUBBAND.SB_DC_ONLY)
{
uQPMode |= 0x200;
}
else
if (sbSubband == SUBBAND.SB_NO_HIGHPASS)
{
uQPMode |= 0x400;
}
if ((uQPMode & 0x600) == 0)
{
throw new ArgumentOutOfRangeException("bitIO", "Frame level QPs must be specified independently!");
}
bitIO.Flush();
}
internal PKPixelInfo(Guid pGUIDPixFmt, uint cChannel, COLORFORMAT cfColorFormat,
BITDEPTH_BITS bdBitDepth, uint cbitUnit, ulong grBit, uint uInterpretation,
uint uSamplePerPixel, uint uBitsPerSample, uint uSampleFormat)
{
this.pGUIDPixFmt = pGUIDPixFmt;
this.cChannel = cChannel;
this.cfColorFormat = cfColorFormat;
this.bdBitDepth = bdBitDepth;
this.cbitUnit = cbitUnit;
this.grBit = grBit;
this.uInterpretation = uInterpretation;
this.uSamplePerPixel = uSamplePerPixel;
this.uBitsPerSample = uBitsPerSample;
this.uSampleFormat = uSampleFormat;
}
