Reland of Create RtcpDemuxer

webrtc/call/rtcp_packet_sink_interface.h

Index: webrtc/call/rtcp_packet_sink_interface.h
diff --git a/webrtc/call/rtcp_packet_sink_interface.h b/webrtc/call/rtcp_packet_sink_interface.h
new file mode 100644
index 0000000000000000000000000000000000000000..e26bd37c507bbc5f77245d8d8a490c493b59834d
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+++ b/webrtc/call/rtcp_packet_sink_interface.h
@@ -0,0 +1,29 @@
+/*
+ *  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.
+ */
+#ifndef WEBRTC_CALL_RTCP_PACKET_SINK_INTERFACE_H_
+#define WEBRTC_CALL_RTCP_PACKET_SINK_INTERFACE_H_
+
+#include "webrtc/base/array_view.h"
+
+namespace webrtc {
+
+// This class represents a receiver of unparsed RTCP packets.
+// TODO(eladalon): Replace this by demuxing over parsed rather than raw data.
+// Whether this should be over an entire RTCP packet, or over RTCP blocks,
+// is still under discussion.
+class RtcpPacketSinkInterface {
+ public:
+  virtual ~RtcpPacketSinkInterface() = default;
+  virtual void OnRtcpPacket(rtc::ArrayView<const uint8_t> packet) = 0;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_CALL_RTCP_PACKET_SINK_INTERFACE_H_