1 /** |
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2 * Java RTP Library (jlibrtp) |
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3 * Copyright (C) 2006 Arne Kepp |
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4 * |
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5 * This library is free software; you can redistribute it and/or |
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6 * modify it under the terms of the GNU Lesser General Public |
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7 * License as published by the Free Software Foundation; either |
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8 * version 2.1 of the License, or (at your option) any later version. |
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9 * |
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10 * This library is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 * Lesser General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU Lesser General Public |
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16 * License along with this library; if not, write to the Free Software |
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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18 */ |
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19 package jlibrtp; |
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20 |
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21 import java.util.Enumeration; |
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22 |
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23 /** |
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24 * The purpose of this thread is to check whether there are packets ready from |
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25 * any participants. |
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26 * |
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27 * It should sleep when not in use, and be woken up by a condition variable. |
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28 * |
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29 * Optionally, if we do jitter-control, the condition variable should have a max waiting period |
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30 * equal to how often we need to push data. |
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31 * |
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32 * @author Arne Kepp |
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33 */ |
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34 public class AppCallerThread extends Thread { |
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35 /** The parent RTP Session */ |
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36 RTPSession rtpSession; |
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37 /** The applications interface, where the callback methods are called */ |
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38 RTPAppIntf appl; |
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39 |
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40 /** |
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41 * Instatiates the AppCallerThread |
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42 * |
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43 * @param session the RTPSession with participants etc |
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44 * @param rtpApp the interface to which data is given |
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45 */ |
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46 protected AppCallerThread(RTPSession session, RTPAppIntf rtpApp) { |
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47 rtpSession = session; |
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48 appl = rtpApp; |
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49 if(RTPSession.rtpDebugLevel > 1) { |
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50 System.out.println("<-> AppCallerThread created"); |
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51 } |
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52 } |
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53 |
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54 /** |
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55 * The AppCallerThread will run in this loop until the RTPSession |
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56 * is terminated. |
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57 * |
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58 * Whenever an RTP packet is received it will loop over the |
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59 * participants to check for packet buffers that have available |
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60 * frame. |
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61 */ |
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62 public void run() { |
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63 if(RTPSession.rtpDebugLevel > 3) { |
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64 System.out.println("-> AppCallerThread.run()"); |
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65 } |
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66 |
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67 while(rtpSession.endSession == false) { |
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68 |
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69 rtpSession.pktBufLock.lock(); |
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70 try { |
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71 if(RTPSession.rtpDebugLevel > 4) { |
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72 System.out.println("<-> AppCallerThread going to Sleep"); |
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73 } |
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74 |
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75 try { rtpSession.pktBufDataReady.await(); } |
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76 catch (Exception e) { System.out.println("AppCallerThread:" + e.getMessage());} |
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77 |
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78 // Next loop over all participants and check whether they have anything for us. |
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79 Enumeration<Participant> enu = rtpSession.partDb.getParticipants(); |
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80 |
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81 while(enu.hasMoreElements()) { |
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82 Participant p = enu.nextElement(); |
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83 |
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84 boolean done = false; |
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85 //System.out.println(p.ssrc + " " + !done +" " + p.rtpAddress |
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86 // + " " + rtpSession.naiveReception + " " + p.pktBuffer); |
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87 //System.out.println("done: " + done + " p.unexpected: " + p.unexpected); |
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88 while(!done && (!p.unexpected || rtpSession.naiveReception) |
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89 && p.pktBuffer != null && p.pktBuffer.length > 0) { |
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90 |
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91 DataFrame aFrame = p.pktBuffer.popOldestFrame(); |
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92 if(aFrame == null) { |
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93 done = true; |
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94 } else { |
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95 appl.receiveData(aFrame, p); |
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96 } |
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97 } |
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98 } |
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99 |
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100 } finally { |
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101 rtpSession.pktBufLock.unlock(); |
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102 } |
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103 |
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104 } |
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105 if(RTPSession.rtpDebugLevel > 3) { |
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106 System.out.println("<- AppCallerThread.run() terminating"); |
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107 } |
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108 } |
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109 |
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110 } |
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