private void updateMap(SliceHeader sh)
{
int mapType = pps.slice_group_map_type;
int numGroups = pps.num_slice_groups_minus1 + 1;
if (numGroups > 1 && mapType >= 3 && mapType <= 5 &&
(sh.slice_group_change_cycle != prevSliceGroupChangeCycle || mbToSliceGroupMap == null))
{
prevSliceGroupChangeCycle = sh.slice_group_change_cycle;
int picWidthInMbs = sps.pic_width_in_mbs_minus1 + 1;
int picHeightInMbs = Utility.getPicHeightInMbs(sps);
int picSizeInMapUnits = picWidthInMbs * picHeightInMbs;
int mapUnitsInSliceGroup0 = sh.slice_group_change_cycle * (pps.slice_group_change_rate_minus1 + 1);
mapUnitsInSliceGroup0 = mapUnitsInSliceGroup0 > picSizeInMapUnits ? picSizeInMapUnits
: mapUnitsInSliceGroup0;
int sizeOfUpperLeftGroup = (pps.slice_group_change_direction_flag ? (picSizeInMapUnits - mapUnitsInSliceGroup0)
: mapUnitsInSliceGroup0);
int[] map;
if (mapType == 3)
{
map = SliceGroupMapBuilder.buildBoxOutMap(picWidthInMbs, picHeightInMbs,
pps.slice_group_change_direction_flag, mapUnitsInSliceGroup0);
}
else if (mapType == 4)
{
map = SliceGroupMapBuilder.buildRasterScanMap(picWidthInMbs, picHeightInMbs, sizeOfUpperLeftGroup,
pps.slice_group_change_direction_flag);
}
else
{
map = SliceGroupMapBuilder.buildWipeMap(picWidthInMbs, picHeightInMbs, sizeOfUpperLeftGroup,
pps.slice_group_change_direction_flag);
}
this.mbToSliceGroupMap = buildMapIndices(map, numGroups);
}
}
public MapManager(SeqParameterSet sps, PictureParameterSet pps)
{
this.sps = sps;
this.pps = pps;
this.mbToSliceGroupMap = buildMap(sps, pps);
}
