Rename FecReceiver to UlpfecReceiver.

BUG=webrtc:5654

Review-Url: https://codereview.webrtc.org/2451643002
Cr-Commit-Position: refs/heads/master@{#14846}

webrtc/modules/rtp_rtcp/include/ulpfec_receiver.h

@@ -0,0 +1,52 @@
+/*
+ *  Copyright (c) 2013 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_MODULES_RTP_RTCP_INCLUDE_ULPFEC_RECEIVER_H_
+#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_ULPFEC_RECEIVER_H_
+
+#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
+#include "webrtc/typedefs.h"
+
+namespace webrtc {
+
+struct FecPacketCounter {
+  FecPacketCounter()
+      : num_packets(0), num_fec_packets(0), num_recovered_packets(0) {}
+
+  size_t num_packets;            // Number of received packets.
+  size_t num_fec_packets;        // Number of received FEC packets.
+  size_t num_recovered_packets;  // Number of recovered media packets using FEC.
+};
+
+class UlpfecReceiver {
+ public:
+  static UlpfecReceiver* Create(RtpData* callback);
+
+  virtual ~UlpfecReceiver() {}
+
+  // Takes a RED packet, strips the RED header, and adds the resulting
+  // "virtual" RTP packet(s) into the internal buffer.
+  //
+  // TODO(brandtr): Set |ulpfec_payload_type| during constructor call,
+  // rather than as a parameter here.
+  virtual int32_t AddReceivedRedPacket(const RTPHeader& rtp_header,
+                                       const uint8_t* incoming_rtp_packet,
+                                       size_t packet_length,
+                                       uint8_t ulpfec_payload_type) = 0;
+
+  // Sends the received packets to the FEC and returns all packets
+  // (both original media and recovered) through the callback.
+  virtual int32_t ProcessReceivedFec() = 0;
+
+  // Returns a counter describing the added and recovered packets.
+  virtual FecPacketCounter GetPacketCounter() const = 0;
+};
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_ULPFEC_RECEIVER_H_