precinctsizespec.java

来自「jpeg2000编解码」· Java 代码 · 共 412 行 · 第 1/2 页

                        w = new Integer(word);
                        
                        // Get next word in argument list
                        try {
                            word = stk.nextToken();
                        } catch (NoSuchElementException e) { 
                            errMsg = "'"+optName+"' option : could not "+
                                "parse the precinct's width";
                            throw new IllegalArgumentException(errMsg);
                            
                        }
                        // Get precinct height
                        h = new Integer(word);
                        if (w.intValue() != (1<<MathUtil.log2(w.intValue()))
                            || h.intValue() !=
                            (1<<MathUtil.log2(h.intValue())) ) {
                            errMsg = "Precinct dimensions must be powers of 2";
                            throw new IllegalArgumentException(errMsg);
                        }
                    } catch( NumberFormatException e) {
                        errMsg = "'"+optName+"' option : the argument '"+word+
                            "' could not be parsed.";
                        throw new IllegalArgumentException(errMsg);
                    }
                    // Store packet's dimensions in Vector arrays
                    v[0].addElement(w);
                    v[1].addElement(h);
                    
                    // Try to get the next token
                    if ( stk.hasMoreTokens() ) {
                        word = stk.nextToken();
                        if ( !Character.isDigit(word.charAt(0)) ) {
                            // The next token does not start with a digit so
                            // it is not a precinct's size argument. We set
                            // the wasReadingPrecinctSize booleen such that we
                            // know that we don't have to read another token
                            // and check for the end of the parameters list.
                            wasReadingPrecinctSize = true;

                            if(curSpecType==SPEC_DEF){
                                setDefault(v);
                            } else if(curSpecType==SPEC_TILE_DEF){
                                for(ti=tileSpec.length-1; ti>=0; ti--) {
                                    if( tileSpec[ti] ){
                                        setTileDef(ti,v);
                                    }
                                }
                            } else if(curSpecType==SPEC_COMP_DEF){
                                for(ci=compSpec.length-1; ci>=0; ci--) {
                                    if( compSpec[ci] ){
                                        setCompDef(ci,v);
                                    }
                                }
                            } else {
                                for(ti=tileSpec.length-1; ti>=0; ti--){
                                    for(ci=compSpec.length-1; ci>=0 ; ci--){
                                        if(tileSpec[ti] && compSpec[ci]){
                                            setTileCompVal(ti,ci,v);
                                        }
                                    }
                                }
                            }
                            // Re-initialize
                            curSpecType = SPEC_DEF;
                            tileSpec = null;
                            compSpec = null;
                            
                            // Go back to 'normal' parsing
                            break;
                        } else {
                            // Next token starts with a digit so read it
                        }
                    } else {
                        // We have reached the end of the parameters list so
                        // we store the last precinct's sizes and we stop
                        if(curSpecType==SPEC_DEF){
                            setDefault(v);
                        } else if(curSpecType==SPEC_TILE_DEF){
                            for(ti=tileSpec.length-1; ti>=0; ti--) {
                                if( tileSpec[ti] ){
                                    setTileDef(ti,v);
                                }
                            }
                        } else if(curSpecType==SPEC_COMP_DEF){
                            for(ci=compSpec.length-1; ci>=0; ci--) {
                                if( compSpec[ci] ){
                                    setCompDef(ci,v);
                                }
                            }
                        } else {
                            for(ti=tileSpec.length-1; ti>=0; ti--){
                                for(ci=compSpec.length-1; ci>=0 ; ci--){
                                    if( tileSpec[ti] && compSpec[ci] ){
                                        setTileCompVal(ti,ci,v);
                                    }
                                }
                            }
                        }
                        endOfParamList = true;
                        break;
                    }
                } // while (true)
                break;
            } // switch
        } // while
    }
    
    /**
     * Returns the precinct partition width in component 'n' and tile 't' at
     * resolution level 'rl'. If the tile index is equal to -1 or if the
     * component index is equal to -1 it means that those should not be taken
     * into account.
     *
     * @param t The tile index, in raster scan order. Specify -1 if it is not
     * a specific tile.
     *
     * @param c The component index. Specify -1 if it is not a specific
     * component.
     * 
     * @param rl The resolution level
     *
     * @return The precinct partition width in component 'c' and tile 't' at
     * resolution level 'rl'.
     * */
    public int getPPX(int t,int c,int rl) {
        int mrl, idx;
        Vector[] v=null;
        boolean tileSpecified = (t!=-1 ? true : false);
        boolean compSpecified = (c!=-1 ? true : false);
        
        // Get the maximum number of decomposition levels and the object
        // (Vector array) containing the precinct dimensions (width and
        // height) for the specified (or not) tile/component
        if (tileSpecified && compSpecified) {
            mrl = ((Integer)dls.getTileCompVal(t, c)).intValue();
            v = (Vector[])getTileCompVal(t, c);
        } else if (tileSpecified && !compSpecified) {
            mrl = ((Integer)dls.getTileDef(t)).intValue();
            v = (Vector[])getTileDef(t);
        } else if (!tileSpecified && compSpecified) {
            mrl = ((Integer)dls.getCompDef(c)).intValue();
            v = (Vector[])getCompDef(c);
        } else {
            mrl = ((Integer)dls.getDefault()).intValue();
            v = (Vector[])getDefault();
        }
        idx = mrl - rl;
        if (v[0].size()>idx) {
             return ((Integer)v[0].elementAt(idx)).intValue();
        } else {
            return ((Integer)v[0].elementAt(v[0].size()-1)).intValue();
        }
    }
    
    /**
     * Returns the precinct partition height in component 'n' and tile 't' at
     * resolution level 'rl'. If the tile index is equal to -1 or if the
     * component index is equal to -1 it means that those should not be taken
     * into account.
     *
     * @param t The tile index, in raster scan order. Specify -1 if it is not
     * a specific tile.
     *
     * @param c The component index. Specify -1 if it is not a specific
     * component.
     * 
     * @param rl The resolution level.
     *
     * @return The precinct partition width in component 'n' and tile 't' at
     * resolution level 'rl'.
     * */
    public int getPPY(int t, int c, int rl) {
        int mrl, idx;
        Vector[] v=null;
        boolean tileSpecified = (t!=-1 ? true : false);
        boolean compSpecified = (c!=-1 ? true : false);
        
        // Get the maximum number of decomposition levels and the object
        // (Vector array) containing the precinct dimensions (width and
        // height) for the specified (or not) tile/component
        if ( tileSpecified && compSpecified ) {
            mrl = ((Integer)dls.getTileCompVal(t, c)).intValue();
            v = (Vector[])getTileCompVal(t, c);
        }
        else if ( tileSpecified && !compSpecified ) {
            mrl = ((Integer)dls.getTileDef(t)).intValue();
            v = (Vector[])getTileDef(t);
        }
        else if ( !tileSpecified && compSpecified ) {
            mrl = ((Integer)dls.getCompDef(c)).intValue();
            v = (Vector[])getCompDef(c);
        }
        else {
            mrl = ((Integer)dls.getDefault()).intValue();
            v = (Vector[])getDefault();
        }
        idx = mrl - rl;
        if ( v[1].size() > idx ) {
            return ((Integer)v[1].elementAt(idx)).intValue();
        }
        else {
            return ((Integer)v[1].elementAt(v[1].size()-1)).intValue();
        }
    }
}