[test][rtcp] Added function for parsing single rtcp packet in tests.

webrtc/test/rtcp_packet_parser.h

 /*
  *  Copyright (c) 2014 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_TEST_RTCP_PACKET_PARSER_H_
 #define WEBRTC_TEST_RTCP_PACKET_PARSER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
+#include "webrtc/base/buffer.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 namespace test {
+// Parse RTCP packet of given type. Assumes RTCP header is valid and that there
+// is excatly one packet of correct type in the buffer.
+template <typename Packet>
+bool ParseSinglePacket(const uint8_t* buffer, size_t size, Packet* packet) {
+  rtcp::CommonHeader header;
+  RTC_CHECK(header.Parse(buffer, size));
+  RTC_CHECK_EQ(static_cast<ptrdiff_t>(size), header.NextPacket() - buffer);
+  return packet->Parse(header);
+}
+// Same function, but takes raw buffer as single argument instead of pair.
+template <size_t N, typename Packet>
+bool ParseSinglePacket(const uint8_t(&buffer)[N], Packet* packet) {
+  return ParseSinglePacket(buffer, N, packet);
+}
+template <typename Packet>
+bool ParseSinglePacket(const rtc::Buffer& buffer, Packet* packet) {
+  return ParseSinglePacket(buffer.data(), buffer.size(), packet);
+}
 
 class RtcpPacketParser;
 
 class PacketType {
  public:
   virtual ~PacketType() {}
 
   int num_packets() const { return num_packets_; }
 
  protected:
@@ skipping 662 matching lines @@
   Rrtr rrtr_;
   Dlrr dlrr_;
   DlrrItems dlrr_items_;
   VoipMetric voip_metric_;
 
   std::map<uint32_t, int> report_blocks_per_ssrc_;
 };
 }  // namespace test
 }  // namespace webrtc
 #endif  // WEBRTC_TEST_RTCP_PACKET_PARSER_H_