cblksizespec.java

jpeg2000算法实现

                }
                
                if ( dim[1].intValue() > maxCBlkHeight ) {
                    maxCBlkHeight = dim[1].intValue();
                }

                if ( firstVal ) {
                    // This is the first time a value is given so we set it as
                    // the default one 
                    setDefault(dim);
                    firstVal = false;
                }

                switch (curSpecType) {
                case  SPEC_DEF:
                    setDefault(dim);
                    break;
                case SPEC_TILE_DEF:
                    for(ti=tileSpec.length-1; ti>=0; ti--) {
                        if( tileSpec[ti] ){
                            setTileDef(ti,dim);
                        }
                    }
                    break;
                case SPEC_COMP_DEF:
                    for(ci=compSpec.length-1; ci>=0; ci--) {
                        if( compSpec[ci] ){
                            setCompDef(ci,dim);
                        }
                    }
                    break;
                default:
                    for(ti=tileSpec.length-1; ti>=0; ti--){
                        for(ci=compSpec.length-1; ci>=0 ; ci--){
                            if(tileSpec[ti] && compSpec[ci]){
                                setTileCompVal(ti,ci,dim);
                            }
                        }
                    }
                    break;
                }
            } // end switch
        }
    }

    /**
     * Returns the maximum code-block's width
     * 
     */
    public int getMaxCBlkWidth() {
        return maxCBlkWidth;
    }

    /**
     * Returns the maximum code-block's height
     * 
     */
    public int getMaxCBlkHeight() {
        return maxCBlkHeight;
    }

    /**
     * Returns the code-block width :
     *
     * <ul>
     * <li>for the specified tile/component</li>
     * <li>for the specified tile</li>
     * <li>for the specified component</li>
     * <li>default value</li>
     * </ul>
     * 
     * The value returned depends on the value of the variable 'type' which
     * can take the following values :<br>
     *
     * <ul> 
     * <li>SPEC_DEF -> Default value is returned. t and c values are
     * ignored</li> 
     * <li>SPEC_COMP_DEF -> Component default value is returned. t value is
     * ignored</li>
     * <li>SPEC_TILE_DEF -> Tile default value is returned. c value is
     * ignored</li>
     * <li>SPEC_TILE_COMP -> Tile/Component value is returned.</li>
     * </ul>
     * 
     * @param type The type of the value we want to be returned
     * 
     * @param t The tile index
     * 
     * @param c the component index
     *
     * @return The code-block width for the specified tile and component
     * */
    public int getCBlkWidth(byte type, int t, int c) {
        Integer dim[] = null;
        switch (type) {
        case SPEC_DEF:
            dim = (Integer[])getDefault();
            break;
        case SPEC_COMP_DEF:
            dim = (Integer[])getCompDef(c);
            break;
        case SPEC_TILE_DEF:
            dim = (Integer[])getTileDef(t);
            break;
        case SPEC_TILE_COMP:
            dim = (Integer[])getTileCompVal(t, c);
        }
        return dim[0].intValue();
    }

    /**
     * Returns the code-block height:
     *
     * <ul>
     * <li>for the specified tile/component</li>
     * <li>for the specified tile</li>
     * <li>for the specified component</li>
     * <li>default value</li>
     * </ul>
     * 
     * The value returned depends on the value of the variable 'type' which
     * can take the following values :
     *
     * <ul> 
     * <li>SPEC_DEF -> Default value is returned. t and c values are
     * ignored</li> 
     * <li>SPEC_COMP_DEF -> Component default value is returned. t value is
     * ignored</li>
     * <li>SPEC_TILE_DEF -> Tile default value is returned. c value is
     * ignored</li>
     * <li>SPEC_TILE_COMP -> Tile/Component value is returned.</li>
     * </ul>
     * 
     * @param type The type of the value we want to be returned
     * 
     * @param t The tile index
     * 
     * @param c the component index
     *
     * @return The code-block height for the specified tile and component
     * */
    public int getCBlkHeight(byte type, int t, int c) {
        Integer dim[] = null;
        switch (type) {
        case SPEC_DEF:
            dim = (Integer[])getDefault();
            break;
        case SPEC_COMP_DEF:
            dim = (Integer[])getCompDef(c);
            break;
        case SPEC_TILE_DEF:
            dim = (Integer[])getTileDef(t);
            break;
        case SPEC_TILE_COMP:
            dim = (Integer[])getTileCompVal(t, c);
        }
        return dim[1].intValue();
    }

    /** 
     * Sets default value for this module 
     *
     * @param value Default value
     * */
    public void setDefault(Object value){
        super.setDefault(value);
        
        // Store the biggest code-block dimensions
        storeHighestDims((Integer[])value);
    }

    /** 
     * Sets default value for specified tile and specValType tag if allowed by
     * its priority.
     *
     * @param c Tile index.
     *
     * @param value Tile's default value
     *  */
    public void setTileDef(int t, Object value){
        super.setTileDef(t, value);
        
        // Store the biggest code-block dimensions
        storeHighestDims((Integer[])value);
    }

    /** 
     * Sets default value for specified component and specValType tag if
     * allowed by its priority.
     *
     * @param c Component index 
     *
     * @param value Component's default value
     *  */
    public void setCompDef(int c, Object value){
        super.setCompDef(c, value);

        // Store the biggest code-block dimensions
        storeHighestDims((Integer[])value);
    }

    /** 
     * Sets value for specified tile-component.
     *
     * @param t Tie index 
     * 
     * @param c Component index 
     *
     * @param value Tile-component's value
     *  */
    public void setTileCompVal(int t,int c, Object value){
        super.setTileCompVal(t, c, value);
        
        // Store the biggest code-block dimensions
        storeHighestDims((Integer[])value);
    }

    /** 
     * Stores the highest code-block width and height
     *
     * @param dim The 2 elements array that contains the code-block width and
     * height.
     *  */
    private void storeHighestDims(Integer[] dim){
        // Store the biggest code-block dimensions
        if ( dim[0].intValue() > maxCBlkWidth ) {
            maxCBlkWidth = dim[0].intValue();
        }
        if ( dim[1].intValue() > maxCBlkHeight ) {
            maxCBlkHeight = dim[1].intValue();
        }
    }
}