1 /* 2 * libjingle 3 * Copyright 2004 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_SESSION_MEDIA_SSRCMUXFILTER_H_ 29 #define TALK_SESSION_MEDIA_SSRCMUXFILTER_H_ 30 31 #include <vector> 32 33 #include "talk/base/basictypes.h" 34 #include "talk/media/base/streamparams.h" 35 36 namespace cricket { 37 38 // This class maintains list of recv SSRC's destined for cricket::BaseChannel. 39 // In case of single RTP session and single transport channel, all session 40 // ( or media) channels share a common transport channel. Hence they all get 41 // SignalReadPacket when packet received on transport channel. This requires 42 // cricket::BaseChannel to know all the valid sources, else media channel 43 // will decode invalid packets. 44 class SsrcMuxFilter { 45 public: 46 SsrcMuxFilter(); 47 ~SsrcMuxFilter(); 48 49 // Whether the rtp mux is active for a sdp session. 50 // Returns true if the filter contains a stream. 51 bool IsActive() const; 52 // Determines packet belongs to valid cricket::BaseChannel. 53 bool DemuxPacket(const char* data, size_t len, bool rtcp); 54 // Adding a valid source to the filter. 55 bool AddStream(const StreamParams& stream); 56 // Removes source from the filter. 57 bool RemoveStream(uint32 ssrc); 58 // Utility method added for unitest. 59 bool FindStream(uint32 ssrc) const; 60 61 private: 62 std::vector<StreamParams> streams_; 63 }; 64 65 } // namespace cricket 66 67 #endif // TALK_SESSION_MEDIA_SSRCMUXFILTER_H_ 68
