Mega Code Archive
Query the manager class about the configuration and support of JMF
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/*
Java Media APIs: Cross-Platform Imaging, Media and Visualization
Alejandro Terrazas
Sams, Published November 2002,
ISBN 0672320940
*/
/*******************************************************************************
* ManagerQuery - Query the manager class about the configuration and support of
* the installed JMF version. ManagerQuery is a text-based application that
* provides a report on the support of the JMF for Players, Processors and
* DataSinks.
*
* Without any command-line arguments ManagerQuery prints a complete (LONG) list
* of Player, Processor, and DataSource classes that support the various
* formats, protocols, and content types.
*
* Alternatively it is possible to provide command-line arguments specifying the
* format or protocol for which support is to be checked. The means of calling
* is as follows: java ManagerQuery [ [-h|-p|-d] support1 support2 ... supportN]
* The -h flag specifies handlers (Players) only. The -p flag specifies
* Processors only. The -d flag specifies DataSources only. Leaving off the flag
* defaults behaviour to checking for Players only.
*
* For instance: java ManagerQuery -h mp3 ulaw would list the classes capable of
* Playing the MP3 (MPEG, Layer 3) and U-Law formats (codecs).
*
* ManagerQuery always prints the version of JMF, caching directory, and hints
* prior to any other output.
*
* @author Spike Barlow
******************************************************************************/
import javax.media.*;
import javax.media.protocol.*;
import javax.media.format.*;
import java.util.*;
public class ManagerQuery {
///////////////////////////////////////////////////
// Constants to facilitate selection of the
// approprite get*List() method.
///////////////////////////////////////////////////
public static final int HANDLERS = 1;
public static final int PROCESSORS = 2;
public static final int DATASOURCES = 3;
///////////////////////////////////////////////////////
// Array containing all the content types that JMF2.1.1
// supports. This is used when the user provides no
// command-line arguments in order to generate a
// complete list of support for all the content types.
/////////////////////////////////////////////////////////
private static final String[] CONTENTS = {
ContentDescriptor.CONTENT_UNKNOWN, ContentDescriptor.MIXED,
ContentDescriptor.RAW, ContentDescriptor.RAW_RTP,
FileTypeDescriptor.AIFF, FileTypeDescriptor.BASIC_AUDIO,
FileTypeDescriptor.GSM, FileTypeDescriptor.MIDI,
FileTypeDescriptor.MPEG, FileTypeDescriptor.MPEG_AUDIO,
FileTypeDescriptor.MSVIDEO, FileTypeDescriptor.QUICKTIME,
FileTypeDescriptor.RMF, FileTypeDescriptor.VIVO,
FileTypeDescriptor.WAVE, VideoFormat.CINEPAK, VideoFormat.H261,
VideoFormat.H263, VideoFormat.H261_RTP, VideoFormat.H263_RTP,
VideoFormat.INDEO32, VideoFormat.INDEO41, VideoFormat.INDEO50,
VideoFormat.IRGB, VideoFormat.JPEG, VideoFormat.JPEG_RTP,
VideoFormat.MJPEGA, VideoFormat.MJPEGB, VideoFormat.MJPG,
VideoFormat.MPEG_RTP, VideoFormat.RGB, VideoFormat.RLE,
VideoFormat.SMC, VideoFormat.YUV, AudioFormat.ALAW,
AudioFormat.DOLBYAC3, AudioFormat.DVI, AudioFormat.DVI_RTP,
AudioFormat.G723, AudioFormat.G723_RTP, AudioFormat.G728,
AudioFormat.G728_RTP, AudioFormat.G729, AudioFormat.G729_RTP,
AudioFormat.G729A, AudioFormat.G729A_RTP, AudioFormat.GSM,
AudioFormat.GSM_MS, AudioFormat.GSM_RTP, AudioFormat.IMA4,
AudioFormat.IMA4_MS, AudioFormat.LINEAR, AudioFormat.MAC3,
AudioFormat.MAC6, AudioFormat.MPEG, AudioFormat.MPEG_RTP,
AudioFormat.MPEGLAYER3, AudioFormat.MSADPCM, AudioFormat.MSNAUDIO,
AudioFormat.MSRT24, AudioFormat.TRUESPEECH, AudioFormat.ULAW,
AudioFormat.ULAW_RTP, AudioFormat.VOXWAREAC10,
AudioFormat.VOXWAREAC16, AudioFormat.VOXWAREAC20,
AudioFormat.VOXWAREAC8, AudioFormat.VOXWAREMETASOUND,
AudioFormat.VOXWAREMETAVOICE, AudioFormat.VOXWARERT29H,
AudioFormat.VOXWARETQ40, AudioFormat.VOXWARETQ60,
AudioFormat.VOXWAREVR12, AudioFormat.VOXWAREVR18 };
////////////////////////////////////
// The protocols that JMF supports.
///////////////////////////////////
private static final String[] PROTOCOLS = { "ftp", "file", "rtp", "http" };
/***************************************************************************
* Return a String being a list of all hints settings.
**************************************************************************/
public static String getHints() {
return "\tSecurity: " + Manager.getHint(Manager.MAX_SECURITY)
+ "\n\tCaching: " + Manager.getHint(Manager.CACHING)
+ "\n\tLightweight Renderer: "
+ Manager.getHint(Manager.LIGHTWEIGHT_RENDERER)
+ "\n\tPlug-in Player: "
+ Manager.getHint(Manager.PLUGIN_PLAYER);
}
/***************************************************************************
* Produce a list of all classes that support the content types or protocols
* passed to the method. The list is returned as a formatted String, while
* the 2nd parameter (which) specifies whether it is Player (Handler),
* Processor, or DataSource classes.
**************************************************************************/
public static String getHandlersOrProcessors(String[] contents, int which) {
String str = "";
Vector classes;
int NUM_PER_LINE = 2;
String LEADING = "\t ";
String SEPARATOR = " ";
if (contents == null)
return null;
/////////////////////////////////////////////////////////////////////
// Generate a separate list for each content-type/protocol specified.
/////////////////////////////////////////////////////////////////////
for (int i = 0; i < contents.length; i++) {
str = str + "\t" + contents[i] + ":\n";
if (which == HANDLERS)
classes = Manager.getHandlerClassList(contents[i]);
else if (which == PROCESSORS)
classes = Manager.getProcessorClassList(contents[i]);
else
classes = Manager.getDataSourceList(contents[i]);
if (classes == null)
str = str + "\t <None>\n";
else
str = str + formatVectorStrings(classes, LEADING, 2, SEPARATOR);
}
return str;
}
/***************************************************************************
* Get a list of all Handler (Player) classes that support each of the
* formats (content types).
**************************************************************************/
public static String getHandlers() {
return getHandlersOrProcessors(CONTENTS, HANDLERS);
}
/***************************************************************************
* Get a list of all Processor classes that support each of the formats
* (content types).
**************************************************************************/
public static String getProcessors() {
return getHandlersOrProcessors(CONTENTS, PROCESSORS);
}
/***************************************************************************
* Get a list of all DataSources classes that support each of the protocols.
**************************************************************************/
public static String getDataSources() {
return getHandlersOrProcessors(PROTOCOLS, DATASOURCES);
}
/***************************************************************************
* Format the Vector of Strings returned by the get*List() methods into a
* single String. A simple formatting method.
**************************************************************************/
public static String formatVectorStrings(Vector vec, String leading,
int count, String separator) {
String str = leading;
for (int i = 0; i < vec.size(); i++) {
str = str + (String) vec.elementAt(i);
if ((i + 1) == vec.size())
str = str + "\n";
else if ((i + 1) % count == 0)
str = str + "\n" + leading;
else
str = str + separator;
}
return str;
}
/***************************************************************************
* Produce a list showing total support (i.e., Player, Processors, and
* DataSinks) for all content types and protocols.
**************************************************************************/
public static void printTotalList() {
System.out.println("\nPlayer Handler Classes:");
System.out.println(getHandlers());
System.out.println("\nProcessor Class List:");
System.out.println(getProcessors());
System.out.println("\nDataSink Class List: ");
System.out.println(getDataSources());
}
/***************************************************************************
* Main method. Produce a version and hints report. Then if no command line
* arguments produce a total class list report. Otherwise process the
* command line arguments and produce a report on their basis only.
**************************************************************************/
public static void main(String args[]) {
System.out.println("JMF: " + Manager.getVersion());
String cacheArea = Manager.getCacheDirectory();
if (cacheArea == null)
System.out.println("No cache directory specified.");
else
System.out.println("Cache Directory: " + cacheArea);
System.out.println("Hints:");
System.out.println(getHints());
// No command-line arguments. Make a toral report.
if (args == null || args.length == 0)
printTotalList();
else {
// Command-line. Process flags and then support to be
// queried upon in order to generate appropriate report.
String header = "";
int whichCategory = 0;
String[] interested;
int i;
int start;
if (args[0].equalsIgnoreCase("-h")) {
header = "\nPlayer Handler Classes: ";
whichCategory = HANDLERS;
} else if (args[0].equalsIgnoreCase("-p")) {
header = "\nProcessor Class List:";
whichCategory = PROCESSORS;
} else if (args[0].equalsIgnoreCase("-d")) {
header = "\nDataSink Class List: ";
whichCategory = DATASOURCES;
}
if (whichCategory == 0) {
whichCategory = HANDLERS;
header = "\nPlayer Handler Classes: ";
interested = new String[args.length];
start = 0;
} else {
interested = new String[args.length - 1];
start = 1;
}
for (i = start; i < args.length; i++)
interested[i - start] = args[i];
System.out.println(header);
System.out.println(getHandlersOrProcessors(interested,
whichCategory));
}
}
}
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