Revert of Create RtcpDemuxer

webrtc/call/rtcp_demuxer.cc

-/*
- *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/call/rtcp_demuxer.h"
-
-#include "webrtc/base/checks.h"
-#include "webrtc/call/rtcp_packet_sink_interface.h"
-#include "webrtc/call/rtp_rtcp_demuxer_helper.h"
-#include "webrtc/common_types.h"
-
-namespace webrtc {
-
-RtcpDemuxer::RtcpDemuxer() = default;
-
-RtcpDemuxer::~RtcpDemuxer() {
-  RTC_DCHECK(ssrc_sinks_.empty());
-  RTC_DCHECK(rsid_sinks_.empty());
-  RTC_DCHECK(broadcast_sinks_.empty());
-}
-
-void RtcpDemuxer::AddSink(uint32_t sender_ssrc, RtcpPacketSinkInterface* sink) {
-  RTC_DCHECK(sink);
-  RTC_DCHECK(!ContainerHasKey(broadcast_sinks_, sink));
-  RTC_DCHECK(!MultimapAssociationExists(ssrc_sinks_, sender_ssrc, sink));
-  ssrc_sinks_.emplace(sender_ssrc, sink);
-}
-
-void RtcpDemuxer::AddSink(const std::string& rsid,
-                          RtcpPacketSinkInterface* sink) {
-  RTC_DCHECK(StreamId::IsLegalName(rsid));
-  RTC_DCHECK(sink);
-  RTC_DCHECK(!ContainerHasKey(broadcast_sinks_, sink));
-  RTC_DCHECK(!MultimapAssociationExists(rsid_sinks_, rsid, sink));
-  rsid_sinks_.emplace(rsid, sink);
-}
-
-void RtcpDemuxer::AddBroadcastSink(RtcpPacketSinkInterface* sink) {
-  RTC_DCHECK(sink);
-  RTC_DCHECK(!MultimapHasValue(ssrc_sinks_, sink));
-  RTC_DCHECK(!MultimapHasValue(rsid_sinks_, sink));
-  RTC_DCHECK(!ContainerHasKey(broadcast_sinks_, sink));
-  broadcast_sinks_.push_back(sink);
-}
-
-void RtcpDemuxer::RemoveSink(const RtcpPacketSinkInterface* sink) {
-  RTC_DCHECK(sink);
-  size_t removal_count = RemoveFromMultimapByValue(&ssrc_sinks_, sink) +
-                         RemoveFromMultimapByValue(&rsid_sinks_, sink);
-  RTC_DCHECK_GT(removal_count, 0);
-}
-
-void RtcpDemuxer::RemoveBroadcastSink(const RtcpPacketSinkInterface* sink) {
-  RTC_DCHECK(sink);
-  auto it = std::find(broadcast_sinks_.begin(), broadcast_sinks_.end(), sink);
-  RTC_DCHECK(it != broadcast_sinks_.end());
-  broadcast_sinks_.erase(it);
-}
-
-void RtcpDemuxer::OnRtcpPacket(rtc::ArrayView<const uint8_t> packet) {
-  // Perform sender-SSRC-based demuxing for packets with a sender-SSRC.
-  rtc::Optional<uint32_t> sender_ssrc = ParseRtcpPacketSenderSsrc(packet);
-  if (sender_ssrc) {
-    auto it_range = ssrc_sinks_.equal_range(*sender_ssrc);
-    for (auto it = it_range.first; it != it_range.second; ++it) {
-      it->second->OnRtcpPacket(packet);
-    }
-  }
-
-  // All packets, even those without a sender-SSRC, are broadcast to sinks
-  // which listen to broadcasts.
-  for (RtcpPacketSinkInterface* sink : broadcast_sinks_) {
-    sink->OnRtcpPacket(packet);
-  }
-}
-
-void RtcpDemuxer::OnRsidResolved(const std::string& rsid, uint32_t ssrc) {
-  // Record the new SSRC association for all of the sinks that were associated
-  // with the RSID.
-  auto it_range = rsid_sinks_.equal_range(rsid);
-  for (auto it = it_range.first; it != it_range.second; ++it) {
-    RtcpPacketSinkInterface* sink = it->second;
-    // Watch out for pre-existing SSRC-based associations.
-    if (!MultimapAssociationExists(ssrc_sinks_, ssrc, sink)) {
-      AddSink(ssrc, sink);
-    }
-  }
-
-  // RSIDs are uniquely associated with SSRCs; no need to keep in memory
-  // the RSID-to-sink association of resolved RSIDs.
-  rsid_sinks_.erase(it_range.first, it_range.second);
-}
-
-}  // namespace webrtc