做go分析的网站百度搜题
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//转自：陈开源的专栏
/**//*在coogo上面看到有人在做项目，是多人视频聊天系统。要我做的感觉是很麻烦的一块。视频传输。我是还没有接触过jmf啊。一开始的时候就是只能捕获摄像头，怎么都不能传输，网络上面这方面的资料也比较上，找了很就都没有找到。没有办法，只有到sun公司去看JMF 2.1.1 Solutions。看了半天的例子，终于算是拼凑出来了。现在的问题就是可以传输，但是本地的影像却看不见了，只能看见远端的。*/
代码如下：
package jmfsample;
import java.io.*
import javax.media.*
import javax.media.util.*
import javax.media.format.*
import javax.media.control.*
import javax.media.control.TrackControl;
import javax.media.protocol.DataSource;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.PushBufferDataSource;
import javax.media.protocol.PushBufferStream;
import javax.media.control.QualityControl;
import javax.media.rtp.*
import javax.media.rtp.rtcp.*
import com.sun.media.rtp.*
import java.awt.*
import java.awt.event.*
import javax.swing.*
import java.net.*
public class JmfV extends JFrame
...{
public static Player player=null
private CaptureDeviceInfo di=null
private MediaLocator locator=null
String str1="vfw:Logitech USB Video Camera:0"
String str2="vfw:Microsoft WDM Image Capture (Win32):0"
private Processor processor = null
private RTPManager rtpMgrs[];
private DataSource dataOutput = null,ds=null,ds_1=null
private String ipAddress;
private int portBase;
public JmfV( String ipAddress,
String pb,
Format format )
...{
this.ipAddress = ipAddress;
Integer integer = Integer.valueOf(pb);
if (integer != null)
this.portBase = integer.intValue();
di=CaptureDeviceManager.getDevice(str2);
locator=di.getLocator();
try
...{
dataOutput=Manager.createDataSource(locator);
player=Manager.createRealizedPlayer(ds);
player.start();
Component comp=null,comp_v=null
if((comp=player.getControlPanelComponent())!=null)
...{
this.getContentPane().add(comp,"North");
if((comp_v=player.getVisualComponent())!=null)
this.getContentPane().add(comp_v,"Center");
}
ds=Manager.createCloneableDataSource(dataOutput);
this.setSize(320,320);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}catch(Exception e )
...{
e.printStackTrace();
}
}
public synchronized String start() ...{
String result;
// Create a processor for the specified media locator
// and program it to output JPEG/RTP
result = createProcessor();
if (result != null)
return result;
// Create an RTP session to transmit the output of the
// processor to the specified IP address and port no.
result = createTransmitter();
if (result != null) ...{
processor.close();
processor = null
return result;
}
// Start the transmission
processor.start();
return null
}
public void stop() ...{
synchronized (this) ...{
if (processor != null) ...{
processor.stop();
processor.close();
processor = null
for (int i = 0 i < rtpMgrs.length; i++) ...{
rtpMgrs[i].removeTargets( "Session ended.");
rtpMgrs[i].dispose();
}
}
}
}
private String createProcessor() ...{
if (locator == null)
return "Locator is null"
// Try to create a processor to handle the input media locator
try ...{
processor = javax.media.Manager.createProcessor(ds);
} catch (NoProcessorException npe) ...{
return "Couldn't create processor"
} catch (IOException ioe) ...{
return "IOException creating processor"
}
// Wait for it to configure
boolean result = waitForState(processor, Processor.Configured);
if (result == false)
return "Couldn't configure processor"
// Get the tracks from the processor
TrackControl [] tracks = processor.getTrackControls();
// Do we have atleast one track?
if (tracks == null || tracks.length < 1)
return "Couldn't find tracks in processor"
// Set the output content descriptor to RAW_RTP
// This will limit the supported formats reported from
// Track.getSupportedFormats to only valid RTP formats.
ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
processor.setContentDescriptor(cd);
Format supported[];
Format chosen;
boolean atLeastOneTrack = false
// Program the tracks.
for (int i = 0 i < tracks.length; i++) ...{
Format format = tracks[i].getFormat();
if (tracks[i].isEnabled()) ...{
supported = tracks[i].getSupportedFormats();
// We've set the output content to the RAW_RTP.
// So all the supported formats should work with RTP.
// We'll just pick the first one.
if (supported.length > 0) ...{
if (supported[0] instanceof VideoFormat) ...{
// For video formats, we should double check the
// sizes since not all formats work in all sizes.
chosen = checkForVideoSizes(tracks[i].getFormat(),
supported[0]);
} else
chosen = supported[0];
tracks[i].setFormat(chosen);
System.err.println("Track " + i + " is set to transmit as:");
System.err.println(" " + chosen);
atLeastOneTrack = true
} else
tracks[i].setEnabled(false);
} else
tracks[i].setEnabled(false);
}
if (!atLeastOneTrack)
return "Couldn't set any of the tracks to a valid RTP format"
// Realize the processor. This will internally create a flow
// graph and attempt to create an output datasource for JPEG/RTP
// audio frames.
result = waitForState(processor, Controller.Realized);
if (result == false)
return "Couldn't realize processor"
// Set the JPEG quality to .5.
setJPEGQuality(processor, 0.5f);
// Get the output data source of the processor
dataOutput = processor.getDataOutput();
return null
}
private String createTransmitter() ...{
// Cheated. Should have checked the type.
PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
PushBufferStream pbss[] = pbds.getStreams();
rtpMgrs = new RTPManager[pbss.length];
SessionAddress localAddr, destAddr;
InetAddress ipAddr;
SendStream sendStream;
int port;
SourceDescription srcDesList[];
for (int i = 0 i < pbss.length; i++) ...{
try ...{
rtpMgrs[i] = RTPManager.newInstance();
// The local session address will be created on the
// same port as the the target port. This is necessary
// if you use AVTransmit2 in conjunction with JMStudio.
// JMStudio assumes - in a unicast session - that the
// transmitter transmits from the same port it is receiving
// on and sends RTCP Receiver Reports back to this port of
// the transmitting host.
port = portBase + 2*i;
ipAddr = InetAddress.getByName(ipAddress);
localAddr = new SessionAddress( InetAddress.getLocalHost(),
port);
destAddr = new SessionAddress( ipAddr, port);
rtpMgrs[i].initialize( localAddr);
rtpMgrs[i].addTarget( destAddr);
System.err.println( "Created RTP session: " + ipAddress + " " + port);
sendStream = rtpMgrs[i].createSendStream(dataOutput, i);
sendStream.start();
} catch (Exception e) ...{
return e.getMessage();
}
}
return null
}
Format checkForVideoSizes(Format original, Format supported) ...{
int width, height;
Dimension size = ((VideoFormat)original).getSize();
Format jpegFmt = new Format(VideoFormat.JPEG_RTP);
Format h263Fmt = new Format(VideoFormat.H263_RTP);
if (supported.matches(jpegFmt)) ...{
// For JPEG, make sure width and height are divisible by 8.
width = (size.width % 8 == 0 ? size.width :
(int)(size.width / 8) * 8);
height = (size.height % 8 == 0 ? size.height :
(int)(size.height / 8) * 8);
} else if (supported.matches(h263Fmt)) ...{
// For H.263, we only support some specific sizes.
if (size.width < 128) ...{
width = 128
height = 96
} else if (size.width < 176) ...{
width = 176
height = 144
} else ...{
width = 352
height = 288
}
} else ...{
// We don't know this particular format. We'll just
// leave it alone then.
return supported;
}
return (new VideoFormat(null,
new Dimension(width, height),
Format.NOT_SPECIFIED,
null,
Format.NOT_SPECIFIED)).intersects(supported);
}
void setJPEGQuality(Player p, float val) ...{
Control cs[] = p.getControls();
QualityControl qc = null
VideoFormat jpegFmt = new VideoFormat(VideoFormat.JPEG);
// Loop through the controls to find the Quality control for
// the JPEG encoder.
for (int i = 0 i < cs.length; i++) ...{
if (cs[i] instanceof QualityControl &&
cs[i] instanceof Owned) ...{
Object owner = ((Owned)cs[i]).getOwner();
// Check to see if the owner is a Codec.
// Then check for the output format.
if (owner instanceof Codec) ...{
Format fmts[] = ((Codec)owner).getSupportedOutputFormats(null);
for (int j = 0 j < fmts.length; j++) ...{
if (fmts[j].matches(jpegFmt)) ...{
qc = (QualityControl)cs[i];
qc.setQuality(val);
System.err.println("- Setting quality to " +
val + " on " + qc);
break
}
}
}
if (qc != null)
break
}
}
}
private Integer stateLock = new Integer(0);
private boolean failed = false
Integer getStateLock() ...{
return stateLock;
}
void setFailed() ...{
failed = true
}
private synchronized boolean waitForState(Processor p, int state) ...{
p.addControllerListener(new StateListener());
failed = false
// Call the required method on the processor
if (state == Processor.Configured) ...{
p.configure();
} else if (state == Processor.Realized) ...{
p.realize();
}
// Wait until we get an event that confirms the
// success of the method, or a failure event.
// See StateListener inner class
while (p.getState() < state && !failed) ...{
synchronized (getStateLock()) ...{
try ...{
getStateLock().wait();
} catch (InterruptedException ie) ...{
return false
}
}
}
if (failed)
return false
else
return true
}
class StateListener implements ControllerListener ...{
public void controllerUpdate(ControllerEvent ce) ...{
// If there was an error during configure or
// realize, the processor will be closed
if (ce instanceof ControllerClosedEvent)
setFailed();
// All controller events, send a notification
// to the waiting thread in waitForState method.
if (ce instanceof ControllerEvent) ...{
synchronized (getStateLock()) ...{
getStateLock().notifyAll();
}
}
}
}
public static void main(String [] args) ...{
// We need three parameters to do the transmission
// For example,
// java AVTransmit2 file:/C:/media/test.mov 129.130.131.132 42050
Format fmt = null
int i = 0
// Create a audio transmit object with the specified params.
JmfV at = new JmfV("169.254.252.50", "42050", fmt);
System.out.println("Test");
// Start the transmission
String result = at.start();
// result will be non-null if there was an error. The return
// value is a String describing the possible error. Print it.
if (result != null) ...{
System.err.println("Error : " + result);
System.exit(0);
}
System.err.println("Start transmission for 60 seconds...");
// Transmit for 60 seconds and then close the processor
// This is a safeguard when using a capture data source
// so that the capture device will be properly released
// before quitting.
// The right thing to do would be to have a GUI with a
// "Stop" button that would call stop on AVTransmit2
try ...{
Thread.currentThread().sleep(60000);
} catch (InterruptedException ie) ...{
}
// Stop the transmission
at.stop();
System.err.println("...transmission ended.");
System.exit(0);
}
}
Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=1768889
本文转自
http://blog.csdn.net/rcyl2003/archive/2007/09/02/1768889.aspx
//转自：陈开源的专栏
/**//*在coogo上面看到有人在做项目，是多人视频聊天系统。要我做的感觉是很麻烦的一块。视频传输。我是还没有接触过jmf啊。一开始的时候就是只能捕获摄像头，怎么都不能传输，网络上面这方面的资料也比较上，找了很就都没有找到。没有办法，只有到sun公司去看JMF 2.1.1 Solutions。看了半天的例子，终于算是拼凑出来了。现在的问题就是可以传输，但是本地的影像却看不见了，只能看见远端的。*/
代码如下：
package jmfsample;
import java.io.*
import javax.media.*
import javax.media.util.*
import javax.media.format.*
import javax.media.control.*
import javax.media.control.TrackControl;
import javax.media.protocol.DataSource;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.PushBufferDataSource;
import javax.media.protocol.PushBufferStream;
import javax.media.control.QualityControl;
import javax.media.rtp.*
import javax.media.rtp.rtcp.*
import com.sun.media.rtp.*
import java.awt.*
import java.awt.event.*
import javax.swing.*
import java.net.*
public class JmfV extends JFrame
...{
public static Player player=null
private CaptureDeviceInfo di=null
private MediaLocator locator=null
String str1="vfw:Logitech USB Video Camera:0"
String str2="vfw:Microsoft WDM Image Capture (Win32):0"
private Processor processor = null
private RTPManager rtpMgrs[];
private DataSource dataOutput = null,ds=null,ds_1=null
private String ipAddress;
private int portBase;
public JmfV( String ipAddress,
String pb,
Format format )
...{
this.ipAddress = ipAddress;
Integer integer = Integer.valueOf(pb);
if (integer != null)
this.portBase = integer.intValue();
di=CaptureDeviceManager.getDevice(str2);
locator=di.getLocator();
try
...{
dataOutput=Manager.createDataSource(locator);
player=Manager.createRealizedPlayer(ds);
player.start();
Component comp=null,comp_v=null
if((comp=player.getControlPanelComponent())!=null)
...{
this.getContentPane().add(comp,"North");
if((comp_v=player.getVisualComponent())!=null)
this.getContentPane().add(comp_v,"Center");
}
ds=Manager.createCloneableDataSource(dataOutput);
this.setSize(320,320);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}catch(Exception e )
...{
e.printStackTrace();
}
}
public synchronized String start() ...{
String result;
// Create a processor for the specified media locator
// and program it to output JPEG/RTP
result = createProcessor();
if (result != null)
return result;
// Create an RTP session to transmit the output of the
// processor to the specified IP address and port no.
result = createTransmitter();
if (result != null) ...{
processor.close();
processor = null
return result;
}
// Start the transmission
processor.start();
return null
}
public void stop() ...{
synchronized (this) ...{
if (processor != null) ...{
processor.stop();
processor.close();
processor = null
for (int i = 0 i < rtpMgrs.length; i++) ...{
rtpMgrs[i].removeTargets( "Session ended.");
rtpMgrs[i].dispose();
}
}
}
}
private String createProcessor() ...{
if (locator == null)
return "Locator is null"
// Try to create a processor to handle the input media locator
try ...{
processor = javax.media.Manager.createProcessor(ds);
} catch (NoProcessorException npe) ...{
return "Couldn't create processor"
} catch (IOException ioe) ...{
return "IOException creating processor"
}
// Wait for it to configure
boolean result = waitForState(processor, Processor.Configured);
if (result == false)
return "Couldn't configure processor"
// Get the tracks from the processor
TrackControl [] tracks = processor.getTrackControls();
// Do we have atleast one track?
if (tracks == null || tracks.length < 1)
return "Couldn't find tracks in processor"
// Set the output content descriptor to RAW_RTP
// This will limit the supported formats reported from
// Track.getSupportedFormats to only valid RTP formats.
ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
processor.setContentDescriptor(cd);
Format supported[];
Format chosen;
boolean atLeastOneTrack = false
// Program the tracks.
for (int i = 0 i < tracks.length; i++) ...{
Format format = tracks[i].getFormat();
if (tracks[i].isEnabled()) ...{
supported = tracks[i].getSupportedFormats();
// We've set the output content to the RAW_RTP.
// So all the supported formats should work with RTP.
// We'll just pick the first one.
if (supported.length > 0) ...{
if (supported[0] instanceof VideoFormat) ...{
// For video formats, we should double check the
// sizes since not all formats work in all sizes.
chosen = checkForVideoSizes(tracks[i].getFormat(),
supported[0]);
} else
chosen = supported[0];
tracks[i].setFormat(chosen);
System.err.println("Track " + i + " is set to transmit as:");
System.err.println(" " + chosen);
atLeastOneTrack = true
} else
tracks[i].setEnabled(false);
} else
tracks[i].setEnabled(false);
}
if (!atLeastOneTrack)
return "Couldn't set any of the tracks to a valid RTP format"
// Realize the processor. This will internally create a flow
// graph and attempt to create an output datasource for JPEG/RTP
// audio frames.
result = waitForState(processor, Controller.Realized);
if (result == false)
return "Couldn't realize processor"
// Set the JPEG quality to .5.
setJPEGQuality(processor, 0.5f);
// Get the output data source of the processor
dataOutput = processor.getDataOutput();
return null
}
private String createTransmitter() ...{
// Cheated. Should have checked the type.
PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
PushBufferStream pbss[] = pbds.getStreams();
rtpMgrs = new RTPManager[pbss.length];
SessionAddress localAddr, destAddr;
InetAddress ipAddr;
SendStream sendStream;
int port;
SourceDescription srcDesList[];
for (int i = 0 i < pbss.length; i++) ...{
try ...{
rtpMgrs[i] = RTPManager.newInstance();
// The local session address will be created on the
// same port as the the target port. This is necessary
// if you use AVTransmit2 in conjunction with JMStudio.
// JMStudio assumes - in a unicast session - that the
// transmitter transmits from the same port it is receiving
// on and sends RTCP Receiver Reports back to this port of
// the transmitting host.
port = portBase + 2*i;
ipAddr = InetAddress.getByName(ipAddress);
localAddr = new SessionAddress( InetAddress.getLocalHost(),
port);
destAddr = new SessionAddress( ipAddr, port);
rtpMgrs[i].initialize( localAddr);
rtpMgrs[i].addTarget( destAddr);
System.err.println( "Created RTP session: " + ipAddress + " " + port);
sendStream = rtpMgrs[i].createSendStream(dataOutput, i);
sendStream.start();
} catch (Exception e) ...{
return e.getMessage();
}
}
return null
}
Format checkForVideoSizes(Format original, Format supported) ...{
int width, height;
Dimension size = ((VideoFormat)original).getSize();
Format jpegFmt = new Format(VideoFormat.JPEG_RTP);
Format h263Fmt = new Format(VideoFormat.H263_RTP);
if (supported.matches(jpegFmt)) ...{
// For JPEG, make sure width and height are divisible by 8.
width = (size.width % 8 == 0 ? size.width :
(int)(size.width / 8) * 8);
height = (size.height % 8 == 0 ? size.height :
(int)(size.height / 8) * 8);
} else if (supported.matches(h263Fmt)) ...{
// For H.263, we only support some specific sizes.
if (size.width < 128) ...{
width = 128
height = 96
} else if (size.width < 176) ...{
width = 176
height = 144
} else ...{
width = 352
height = 288
}
} else ...{
// We don't know this particular format. We'll just
// leave it alone then.
return supported;
}
return (new VideoFormat(null,
new Dimension(width, height),
Format.NOT_SPECIFIED,
null,
Format.NOT_SPECIFIED)).intersects(supported);
}
void setJPEGQuality(Player p, float val) ...{
Control cs[] = p.getControls();
QualityControl qc = null
VideoFormat jpegFmt = new VideoFormat(VideoFormat.JPEG);
// Loop through the controls to find the Quality control for
// the JPEG encoder.
for (int i = 0 i < cs.length; i++) ...{
if (cs[i] instanceof QualityControl &&
cs[i] instanceof Owned) ...{
Object owner = ((Owned)cs[i]).getOwner();
// Check to see if the owner is a Codec.
// Then check for the output format.
if (owner instanceof Codec) ...{
Format fmts[] = ((Codec)owner).getSupportedOutputFormats(null);
for (int j = 0 j < fmts.length; j++) ...{
if (fmts[j].matches(jpegFmt)) ...{
qc = (QualityControl)cs[i];
qc.setQuality(val);
System.err.println("- Setting quality to " +
val + " on " + qc);
break
}
}
}
if (qc != null)
break
}
}
}
private Integer stateLock = new Integer(0);
private boolean failed = false
Integer getStateLock() ...{
return stateLock;
}
void setFailed() ...{
failed = true
}
private synchronized boolean waitForState(Processor p, int state) ...{
p.addControllerListener(new StateListener());
failed = false
// Call the required method on the processor
if (state == Processor.Configured) ...{
p.configure();
} else if (state == Processor.Realized) ...{
p.realize();
}
// Wait until we get an event that confirms the
// success of the method, or a failure event.
// See StateListener inner class
while (p.getState() < state && !failed) ...{
synchronized (getStateLock()) ...{
try ...{
getStateLock().wait();
} catch (InterruptedException ie) ...{
return false
}
}
}
if (failed)
return false
else
return true
}
class StateListener implements ControllerListener ...{
public void controllerUpdate(ControllerEvent ce) ...{
// If there was an error during configure or
// realize, the processor will be closed
if (ce instanceof ControllerClosedEvent)
setFailed();
// All controller events, send a notification
// to the waiting thread in waitForState method.
if (ce instanceof ControllerEvent) ...{
synchronized (getStateLock()) ...{
getStateLock().notifyAll();
}
}
}
}
public static void main(String [] args) ...{
// We need three parameters to do the transmission
// For example,
// java AVTransmit2 file:/C:/media/test.mov 129.130.131.132 42050
Format fmt = null
int i = 0
// Create a audio transmit object with the specified params.
JmfV at = new JmfV("169.254.252.50", "42050", fmt);
System.out.println("Test");
// Start the transmission
String result = at.start();
// result will be non-null if there was an error. The return
// value is a String describing the possible error. Print it.
if (result != null) ...{
System.err.println("Error : " + result);
System.exit(0);
}
System.err.println("Start transmission for 60 seconds...");
// Transmit for 60 seconds and then close the processor
// This is a safeguard when using a capture data source
// so that the capture device will be properly released
// before quitting.
// The right thing to do would be to have a GUI with a
// "Stop" button that would call stop on AVTransmit2
try ...{
Thread.currentThread().sleep(60000);
} catch (InterruptedException ie) ...{
}
// Stop the transmission
at.stop();
System.err.println("...transmission ended.");
System.exit(0);
}
}
Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=1768889
本文转自
http://blog.csdn.net/rcyl2003/archive/2007/09/02/1768889.aspx