15976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org/* 25976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * libjingle 35976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * Copyright 2004 Google Inc. 45976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 55976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * Redistribution and use in source and binary forms, with or without 65976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * modification, are permitted provided that the following conditions are met: 75976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 85976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 1. Redistributions of source code must retain the above copyright notice, 95976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * this list of conditions and the following disclaimer. 105976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 2. Redistributions in binary form must reproduce the above copyright notice, 115976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * this list of conditions and the following disclaimer in the documentation 125976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * and/or other materials provided with the distribution. 135976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 3. The name of the author may not be used to endorse or promote products 145976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * derived from this software without specific prior written permission. 155976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * 165976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 175976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 185976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 195976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 205976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 215976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 225976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 235976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 245976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 255976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 265976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org */ 275976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 285976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org#include "talk/session/media/ssrcmuxfilter.h" 295976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 305976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org#include <algorithm> 315976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 325976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org#include "talk/base/logging.h" 335976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org#include "talk/media/base/rtputils.h" 345976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 355976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgnamespace cricket { 365976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 375976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgstatic const uint32 kSsrc01 = 0x01; 385976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 395976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgSsrcMuxFilter::SsrcMuxFilter() { 405976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 415976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 425976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgSsrcMuxFilter::~SsrcMuxFilter() { 435976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 445976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 455976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgbool SsrcMuxFilter::IsActive() const { 465976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return !streams_.empty(); 475976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 485976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 495976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgbool SsrcMuxFilter::DemuxPacket(const char* data, size_t len, bool rtcp) { 505976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org uint32 ssrc = 0; 515976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (!rtcp) { 525976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org GetRtpSsrc(data, len, &ssrc); 535976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } else { 545976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org int pl_type = 0; 555976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (!GetRtcpType(data, len, &pl_type)) return false; 565976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (pl_type == kRtcpTypeSDES) { 575976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org // SDES packet parsing not supported. 585976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org LOG(LS_INFO) << "SDES packet received for demux."; 595976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return true; 605976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } else { 615976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (!GetRtcpSsrc(data, len, &ssrc)) return false; 625976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (ssrc == kSsrc01) { 635976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org // SSRC 1 has a special meaning and indicates generic feedback on 645976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org // some systems and should never be dropped. If it is forwarded 655976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org // incorrectly it will be ignored by lower layers anyway. 665976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return true; 675976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } 685976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } 695976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } 705976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return FindStream(ssrc); 715976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 725976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 735976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgbool SsrcMuxFilter::AddStream(const StreamParams& stream) { 745976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (GetStreamBySsrc(streams_, stream.first_ssrc(), NULL)) { 755976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org LOG(LS_WARNING) << "Stream already added to filter"; 765976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return false; 775976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } 785976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org streams_.push_back(stream); 795976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return true; 805976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 815976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 825976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgbool SsrcMuxFilter::RemoveStream(uint32 ssrc) { 835976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return RemoveStreamBySsrc(&streams_, ssrc); 845976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 855976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 865976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.orgbool SsrcMuxFilter::FindStream(uint32 ssrc) const { 875976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org if (ssrc == 0) { 885976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return false; 895976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org } 905976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org return (GetStreamBySsrc(streams_, ssrc, NULL)); 915976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} 925976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org 935976650443d68ccfadf1dea24999ee459dd2819mflodman@webrtc.org} // namespace cricket 94