[es] - rtp/rtsp - mp3 on demand ?

rapidlord
Vladan Markovic
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rtp/rtsp - mp3 on demand ?

^{23.09.2004. u 17:54}

Zdravo,

Dali neko moze da mi pomogne u ovome.
Treba da napravim server za striming mp3 muzike, java ima podrsku za to u Java Media Framework (JMF), RTP server/klijent i RTSP samo klijent podrsku.
RTSP za razliku od RTP ima kontrolu vracanja pauze ubrzavanja audio/videa ..., dali je sa RTP moguce da se uradi nesto slicno ili ste ograniceni samo na slusanje/gledanje bez ikakve kontrole.
Negde sam nalazio i slucaj RTP Server/RSTP klijent dali je ovaj slucaj bolji od RTP/RTP i u kom smislu.
Takodje me zanima dali moze da se strimuje MP3 fajl, dali RTP ima podrsku za njega.
Ako ima jos nesto da se doda rado bih cuo bilo sta sto bi malo razjasnilo ovu pricu.

Hvala.

"There are many here among us who feel that life is but a joke.
But you and I, we've been through that, and this is not our fate,
So let us not talk falsely now, the hour is getting late."

^{23.09.2004. u 17:54}

Sanjin_JMF
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Re: rtp/rtsp - mp3 on demand ?

^{17.01.2007. u 23:35}

Code:

import javax.media.*;
import javax.media.protocol.*;
import javax.media.control.*;

public class DKRTPServer implements ControllerListener {

    private String serverURL;
    private DataSource ds = null;
    private MediaLocator destination;
    private Processor p = null;


    DKRTPServer (String _serverURL, DataSource _ds){
        serverURL = _serverURL;
        ds = _ds;
        try {
            p = Manager.createProcessor(ds);
            p.addControllerListener(this);

            p.configure();

        }
         catch (Exception e){
             System.out.println(e);
        }

        String destinationURL = serverURL;
        destination = new MediaLocator(destinationURL);

    }

    public synchronized void controllerUpdate(ControllerEvent evt){
        if (evt instanceof ConfigureCompleteEvent) {
            setTrackFormat(p);
            p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP));

            p.realize();
        }
        else if (evt instanceof RealizeCompleteEvent) {
            transmit(p);
        }
        else if (evt instanceof EndOfMediaEvent) {
            // System.exit(0);
        }
        else {

        }

    }

    private void setTrackFormat(Processor p) {
        // Get the tracks from the processor
        TrackControl [] tracks = p.getTrackControls();

        // Do we have atleast one track?
        if (tracks == null || tracks.length < 1) {
            System.out.println("Couldn't find tracks in processor");
            System.exit(1);
        }

        // 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);
        p.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();
            for (int n = 0; n < supported.length; n++)
                System.out.println("Supported format: " + supported[n]);

            // 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) {
                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);
        }
    }

    private void transmit(Processor p) {
        try {
            DataSource output = p.getDataOutput();
            DataSink rtpSink;
            rtpSink = Manager.createDataSink(output, destination);
            System.out.println("Sink content type: " + rtpSink.getContentType());
            System.out.println("Sink media type: " + rtpSink.getOutputLocator().toString());
            rtpSink.open();
            rtpSink.start();
            p.start();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

_{[Ovu poruku je menjao hyle dana 18.01.2007. u 00:46 GMT+1]}

^{17.01.2007. u 23:35}