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_BUNDLEFILTER_H_ 29 #define TALK_SESSION_MEDIA_BUNDLEFILTER_H_ 30 31 #include <set> 32 #include <vector> 33 34 #include "talk/media/base/streamparams.h" 35 #include "webrtc/base/basictypes.h" 36 37 namespace cricket { 38 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 // 45 // This class determines whether a packet is destined for cricket::BaseChannel. 46 // For rtp packets, this is decided based on the payload type. For rtcp packets, 47 // this is decided based on the sender ssrc values. 48 class BundleFilter { 49 public: 50 BundleFilter(); 51 ~BundleFilter(); 52 53 // Determines packet belongs to valid cricket::BaseChannel. 54 bool DemuxPacket(const char* data, size_t len, bool rtcp); 55 56 // Adds the supported payload type. 57 void AddPayloadType(int payload_type); 58 59 // Adding a valid source to the filter. 60 bool AddStream(const StreamParams& stream); 61 62 // Removes source from the filter. 63 bool RemoveStream(uint32 ssrc); 64 65 // Utility methods added for unitest. 66 // True if |streams_| is not empty. 67 bool HasStreams() const; 68 bool FindStream(uint32 ssrc) const; 69 bool FindPayloadType(int pl_type) const; 70 void ClearAllPayloadTypes(); 71 72 73 private: 74 std::set<int> payload_types_; 75 std::vector<StreamParams> streams_; 76 }; 77 78 } // namespace cricket 79 80 #endif // TALK_SESSION_MEDIA_BUNDLEFILTER_H_ 81