decoder.java

来自「jpeg2000编解码」· Java 代码 · 共 1,326 行 · 第 1/4 页

				    new ImgWriterPGX(out[i],decodedImage,i,
						     csMap.isOutputSigned(i));
			    } else {
				imwriter[i] =
				    new ImgWriterPGX(out[i],decodedImage,i,
						     hd.isOriginalSigned(i));
			    }
                        } catch (IOException e) {
                            error("Cannot write PGX header or open output "+
                                  "file for component " 
                                  + i + ((e.getMessage() != null) ?
                                         (":\n"+e.getMessage()) : ""),2);
                            if(pl.getParameter("debug").equals("on")) {
                                e.printStackTrace();
                            } else {
                                error("Use '-debug' option for more "+
                                      "details",2);
                            }
                            return;
                        }
		    }

		    try {
			imwriter[i].writeAll();
		    } catch (IOException e) {
			error("I/O error while writing output file" +
			      ((e.getMessage() != null) ?
			       (":\n"+e.getMessage()) : ""),2);
                        if(pl.getParameter("debug").equals("on")) {
                            e.printStackTrace();
                        } else {
                            error("Use '-debug' option for more details",2);
                        }
			return;
		    }
		    try {
			imwriter[i].close();
		    } catch (IOException e) {
			error("I/O error while closing output file (data may "+
                              "be corrupted" + ((e.getMessage() != null) ?
                                                (":\n"+e.getMessage()) : ""),
			      2);
                        if(pl.getParameter("debug").equals("on")) {
                            e.printStackTrace();
                        } else {
                            error("Use '-debug' option for more details",2);
                        }
			return;
		    }
		}
	    }

	    // **** Print some resulting info ****
	    if(verbose) {
		// Print actually read bitrate
                // if file format used add the read file format bytes
                float bitrate = breader.getActualRate();
                int numBytes = breader.getActualNbytes();
                if(ff.JP2FFUsed){
                    int imageSize =(int)((8.0f*numBytes)/bitrate);
                    numBytes +=ff.getFirstCodeStreamPos(); 
                    bitrate = (numBytes*8.0f)/imageSize;
                } 

                if(pl.getIntParameter("ncb_quit") == -1) {
                    FacilityManager.getMsgLogger().
                        println("Actual bitrate = "+bitrate+
                                " bpp (i.e. "+numBytes+" bytes)",8,8);
		} else {
                    FacilityManager.getMsgLogger().
                        println("Number of packet body bytes read = "+numBytes,
                                8,8);
		}
		FacilityManager.getMsgLogger().flush();
	    }
		
        } catch (IllegalArgumentException e) {
	    error(e.getMessage(),2);
            if(pl.getParameter("debug").equals("on"))
                e.printStackTrace();
	    return;
	} catch (Error e) {
            if(e.getMessage()!=null) {
                error(e.getMessage(),2);
            } else {
                error("An error has occured during decoding.",2);
            }

            if(pl.getParameter("debug").equals("on")) {
                e.printStackTrace();
            } else {
                error("Use '-debug' option for more details",2);
            }
            return;
        } catch (RuntimeException e) {
            if(e.getMessage()!=null) {
                error("An uncaught runtime exception has occurred:\n"+
                      e.getMessage(),2);
            } else {
                error("An uncaught runtime exception has occurred.",2);
            }
            if(pl.getParameter("debug").equals("on")) {
                e.printStackTrace();
            } else {
                error("Use '-debug' option for more details",2);
            }
            return;
        } catch (Throwable e) {
            error("An uncaught exception has occurred.",2);
            if(pl.getParameter("debug").equals("on")) {
                e.printStackTrace();
            } else {
                error("Use '-debug' option for more details",2);
            }
            return;
        }
    }

    /**
     * Prints the error message 'msg' to standard err, prepending "ERROR" to
     * it, and sets the exitCode to 'code'. An exit code different than 0
     * indicates that there where problems. 
     *
     * @param msg The error message
     *
     * @param code The exit code to set
     * */
    private void error(String msg, int code) {
        exitCode = code;
        FacilityManager.getMsgLogger().printmsg(MsgLogger.ERROR,msg);
    }

    /**
     * Prints the error message 'msg' to standard err, prepending
     * "ERROR" to it, and sets the exitCode to 'code'. An exit code
     * different than 0 indicates that there where problems. Either
     * the stacktrace or a "details" message is output depending on
     * the data of the "debug" parameter.
     *
     * @param msg The error message
     *
     * @param code The exit code to set
     *
     * @param ex The exception associated with the call
     * */
    private void error(String msg, int code, Throwable ex) {
	exitCode = code;
	FacilityManager.getMsgLogger().printmsg(MsgLogger.ERROR,msg);
	if(pl.getParameter("debug").equals("on")) {
	    ex.printStackTrace();
	} else {
	    error("Use '-debug' option for more details",2); 
	}
    }
 
    /** 
     * Return the information found in the COM marker segments encountered in
     * the decoded codestream. 
     * */
    public String[] getCOMInfo() {
        if(hi==null) { // The codestream has not been read yet
            return null;
        }

        int nCOMMarkers = hi.getNumCOM();
        Enumeration com = hi.com.elements();
        String[] infoCOM = new String[nCOMMarkers];
        for(int i=0; i<nCOMMarkers; i++) {
            infoCOM[i] = com.nextElement().toString();
        }
        return infoCOM;
    }

    /** 
     * Returns all the parameters used in the decoding chain. It calls
     * parameter from each module and store them in one array (one row per
     * parameter and 4 columns).
     *
     * @return All decoding parameters
     *
     * @see #getParameterInfo 
     * */
    public static String[][] getAllParameters() {
	Vector vec = new Vector();
	int i;

	String[][] str = BitstreamReaderAgent.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = EntropyDecoder.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = ROIDeScaler.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = Dequantizer.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = InvCompTransf.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = HeaderDecoder.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = Unscrambling.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = ICCProfiler.getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = getParameterInfo();
	if(str!=null) for(i=str.length-1; i>=0; i--) vec.addElement(str[i]);

	str = new String[vec.size()][4];
	if(str!=null) for(i=str.length-1; i>=0; i--)
	    str[i] = (String[])vec.elementAt(i);

	return str;
    }

    /**
     * Prints the warning message 'msg' to standard err, prepending "WARNING"
     * to it.
     *
     * @param msg The error message
     * */
    private void warning(String msg) {
        FacilityManager.getMsgLogger().printmsg(MsgLogger.WARNING,msg);
    }

    /**
     * Prints version and copyright information to the logging facility
     * returned by FacilityManager.getMsgLogger()
     * */
    private void printVersionAndCopyright() {
        FacilityManager.getMsgLogger()
            .println("JJ2000's JPEG 2000 Decoder\n",2,4);
        FacilityManager.getMsgLogger()
            .println("Version: "+JJ2KInfo.version+"\n",2,4);
        FacilityManager.getMsgLogger()
            .println("Copyright:\n\n"+JJ2KInfo.copyright+"\n",2,4);
        FacilityManager.getMsgLogger().
            println("Send bug reports to: "+JJ2KInfo.bugaddr+"\n",2,4);
    }

    /**
     * Prints the usage information to stdout. The usage information is
     * written for all modules in the decoder.
     * */
    private void printUsage() {
        String opts[][];
        int i;
        MsgLogger ml = FacilityManager.getMsgLogger();

        ml.println("Usage:",0,0);
        ml.println("JJ2KDecoder args...\n",10,12);
        ml.println("The exit code of the decoder is non-zero "+
                   "if an error occurs.",2,4);
        ml.println("The following arguments are recongnized:\n",2,4);
        
        // Print decoding options
        printParamInfo(ml,getAllParameters());

        // Print bug-report address
        FacilityManager.getMsgLogger().println("\n\n",0,0);
        FacilityManager.getMsgLogger().
            println("Send bug reports to: "+JJ2KInfo.bugaddr+"\n",2,4);
    }

    /**
     * Prints the parameters in 'pinfo' to the provided output, 'out', showing
     * the existing defaults. The message is printed to the logging facility
     * returned by FacilityManager.getMsgLogger(). The 'pinfo' argument is a
     * 2D String array. The first dimension contains String arrays, 1 for each
     * parameter. Each of these arrays has 3 elements, the first element is
     * the parameter name, the second element is the synopsis for the
     * parameter and the third one is a long description of the parameter. If
     * the synopsis or description is 'null' then no synopsis or description
     * is printed, respectively. If there is a default value for a parameter
     * it is also printed.
     *
     * @param out Where to print.
     *
     * @param pinfo The parameter information to write.
     * */
    private void printParamInfo(MsgLogger out, String pinfo[][]) {
        String defval;

        for (int i=0; i<pinfo.length; i++) {
            defval = defpl.getParameter(pinfo[i][0]);
            if (defval != null) { // There is a default value
                out.println("-" + pinfo[i][0] +
                         ((pinfo[i][1] != null) ? " "+pinfo[i][1]+" " : " ") +
                         "(default = "+defval+")",4,8);
            } else { // There is no default value
                out.println("-" + pinfo[i][0] +
                         ((pinfo[i][1] != null) ? " "+pinfo[i][1] : ""),4,8);
            }
            // Is there an explanatory message?
            if (pinfo[i][2] != null) {
                out.println(pinfo[i][2],6,6);
            }
        }
    }

    /** 
     * Exit the decoding process according to the isChildProcess variable
     **/
    public void exit() {
        if(isChildProcess) {
            if(win!=null)
                win.dispose();
            if(title!=null)
                title.done = true;
            return;
        } else {
            System.exit(0);
        }
    }

    /** 
     * Set isChildProcess variable.
     *
     * @param b The boolean value
     * */
    public void setChildProcess(boolean b) {
        isChildProcess = b;
    }
}