//Compute the difference tile dwt
public static void SubBandDiffing_DT(RfxProgressiveCodecContext encodingContext, TileState enTileInfo)
{
if (encodingContext.UseDifferenceTile)
{
DwtTile oldDwt = enTileInfo.GetOldDwt();
if (oldDwt != null)
{
short[] yDiffDwt, cbDiffDwt, crDiffDwt;
int lenOfNonLL3Band = (RdpegfxTileUtils.ComponentElementCount - RdpegfxTileUtils.GetBandSize(BandType_Values.LL3, encodingContext.UseReduceExtrapolate));// ? 81 : 64;
int yNewZeroCount, cbNewZeroCount, crNewZeroCount;
int yDiffZeroCount, cbDiffZeroCount, crDiffZeroCount;
yDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.YComponent, oldDwt.Y_DwtQ, lenOfNonLL3Band, out yNewZeroCount, out yDiffZeroCount);
cbDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.CbComponent, oldDwt.Cb_DwtQ, lenOfNonLL3Band, out cbNewZeroCount, out cbDiffZeroCount);
crDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.CrComponent, oldDwt.Cr_DwtQ, lenOfNonLL3Band, out crNewZeroCount, out crDiffZeroCount);
if ((yDiffDwt != null && cbDiffDwt != null && crDiffDwt != null) &&
(yNewZeroCount + cbNewZeroCount + crNewZeroCount < yDiffZeroCount + cbDiffZeroCount + crDiffZeroCount))
{//use difference tile
encodingContext.YComponent = yDiffDwt;
encodingContext.CbComponent = cbDiffDwt;
encodingContext.CrComponent = crDiffDwt;
return;
}
}
}
encodingContext.UseDifferenceTile = false;//use orginal tile
}
//Compute the difference tile dwt
public static void SubBandDiffing_DT(RfxProgressiveCodecContext encodingContext, TileState enTileInfo)
{
if (encodingContext.UseDifferenceTile)
{
DwtTile oldDwt = enTileInfo.GetOldDwt();
if (oldDwt != null)
{
short[] yDiffDwt, cbDiffDwt, crDiffDwt;
int lenOfNonLL3Band = (RdpegfxTileUtils.ComponentElementCount - RdpegfxTileUtils.GetBandSize(BandType_Values.LL3, encodingContext.UseReduceExtrapolate));// ? 81 : 64;
int yNewZeroCount, cbNewZeroCount, crNewZeroCount;
int yDiffZeroCount, cbDiffZeroCount, crDiffZeroCount;
yDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.YComponent, oldDwt.Y_DwtQ, lenOfNonLL3Band, out yNewZeroCount, out yDiffZeroCount);
cbDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.CbComponent, oldDwt.Cb_DwtQ, lenOfNonLL3Band, out cbNewZeroCount, out cbDiffZeroCount);
crDiffDwt = RdpegfxTileUtils.SubDiffingDwt(encodingContext.CrComponent, oldDwt.Cr_DwtQ, lenOfNonLL3Band, out crNewZeroCount, out crDiffZeroCount);
if ((yDiffDwt != null && cbDiffDwt != null && crDiffDwt != null) &&
(yNewZeroCount + cbNewZeroCount + crNewZeroCount < yDiffZeroCount + cbDiffZeroCount + crDiffZeroCount))
{//use difference tile
encodingContext.YComponent = yDiffDwt;
encodingContext.CbComponent = cbDiffDwt;
encodingContext.CrComponent = crDiffDwt;
return;
}
}
}
encodingContext.UseDifferenceTile = false;//use orginal tile
}
