/**
* Returns the maximum number of magnitude bits in any subband of the current tile if reversible
* quantization is used
*
* @param sb The root of the subband tree of the current tile
* @param c the component number
* @return The highest number of magnitude bit-planes
*/
private int getMaxMagBitsRev(Subband sb, int c) {
int tmp, max = 0;
int g = ((Integer) gbs.getTileCompVal(tIdx, c)).intValue();
if (!sb.isNode) return g - 1 + src.getNomRangeBits(c) + sb.anGainExp;
max = getMaxMagBitsRev(sb.getLL(), c);
tmp = getMaxMagBitsRev(sb.getLH(), c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsRev(sb.getHL(), c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsRev(sb.getHH(), c);
if (tmp > max) max = tmp;
return max;
}
/**
* Returns the maximum number of magnitude bits in any subband in the given tile-component if
* derived quantization is used
*
* @param sb The root of the subband tree of the tile-component
* @param t Tile index
* @param c Component index
* @return The highest number of magnitude bit-planes
*/
private int getMaxMagBitsDerived(Subband sb, int t, int c) {
int tmp, max = 0;
int g = ((Integer) gbs.getTileCompVal(t, c)).intValue();
if (!sb.isNode) {
float baseStep = ((Float) qsss.getTileCompVal(t, c)).floatValue();
return g - 1 + sb.level - (int) Math.floor(Math.log(baseStep) / log2);
}
max = getMaxMagBitsDerived(sb.getLL(), t, c);
tmp = getMaxMagBitsDerived(sb.getLH(), t, c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsDerived(sb.getHL(), t, c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsDerived(sb.getHH(), t, c);
if (tmp > max) max = tmp;
return max;
}
/**
* Returns the maximum number of magnitude bits in any subband in the given tile-component if
* expounded quantization is used
*
* @param sb The root of the subband tree of the tile-component
* @param t Tile index
* @param c Component index
* @return The highest number of magnitude bit-planes
*/
private int getMaxMagBitsExpounded(Subband sb, int t, int c) {
int tmp, max = 0;
int g = ((Integer) gbs.getTileCompVal(t, c)).intValue();
if (!sb.isNode) {
float baseStep = ((Float) qsss.getTileCompVal(t, c)).floatValue();
return g
- 1
- (int)
Math.floor(
Math.log(baseStep / (((SubbandAn) sb).l2Norm * (1 << sb.anGainExp))) / log2);
}
max = getMaxMagBitsExpounded(sb.getLL(), t, c);
tmp = getMaxMagBitsExpounded(sb.getLH(), t, c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsExpounded(sb.getHL(), t, c);
if (tmp > max) max = tmp;
tmp = getMaxMagBitsExpounded(sb.getHH(), t, c);
if (tmp > max) max = tmp;
return max;
}
