[rtp_rtcp] rtcp::Tmmbn moved into own file

webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn_unittest.cc

+/*
+ *  Copyright (c) 2016 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/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
+#include "webrtc/test/rtcp_packet_parser.h"
+
+using webrtc::rtcp::RawPacket;
+using webrtc::rtcp::Tmmbn;
+using webrtc::test::RtcpPacketParser;
+
+namespace webrtc {
+const uint32_t kSenderSsrc = 0x12345678;
+const uint32_t kRemoteSsrc = 0x23456789;
+
+TEST(RtcpPacketTest, TmmbnWithNoItem) {
+  Tmmbn tmmbn;
+  tmmbn.From(kSenderSsrc);
+
+  rtc::scoped_ptr<RawPacket> packet(tmmbn.Build());
+  RtcpPacketParser parser;
+  parser.Parse(packet->Buffer(), packet->Length());
+  EXPECT_EQ(1, parser.tmmbn()->num_packets());
+  EXPECT_EQ(kSenderSsrc, parser.tmmbn()->Ssrc());
+  EXPECT_EQ(0, parser.tmmbn_items()->num_packets());
+}
+
+TEST(RtcpPacketTest, TmmbnWithOneItem) {
+  Tmmbn tmmbn;
+  tmmbn.From(kSenderSsrc);
+  EXPECT_TRUE(tmmbn.WithTmmbr(kRemoteSsrc, 312, 60));
+
+  rtc::scoped_ptr<RawPacket> packet(tmmbn.Build());
+  RtcpPacketParser parser;
+  parser.Parse(packet->Buffer(), packet->Length());
+  EXPECT_EQ(1, parser.tmmbn()->num_packets());
+  EXPECT_EQ(kSenderSsrc, parser.tmmbn()->Ssrc());
+  EXPECT_EQ(1, parser.tmmbn_items()->num_packets());
+  EXPECT_EQ(kRemoteSsrc, parser.tmmbn_items()->Ssrc(0));
+  EXPECT_EQ(312U, parser.tmmbn_items()->BitrateKbps(0));
+  EXPECT_EQ(60U, parser.tmmbn_items()->Overhead(0));
+}
+
+TEST(RtcpPacketTest, TmmbnWithTwoItems) {
+  Tmmbn tmmbn;
+  tmmbn.From(kSenderSsrc);
+  EXPECT_TRUE(tmmbn.WithTmmbr(kRemoteSsrc, 312, 60));
+  EXPECT_TRUE(tmmbn.WithTmmbr(kRemoteSsrc + 1, 1288, 40));
+
+  rtc::scoped_ptr<RawPacket> packet(tmmbn.Build());
+  RtcpPacketParser parser;
+  parser.Parse(packet->Buffer(), packet->Length());
+  EXPECT_EQ(1, parser.tmmbn()->num_packets());
+  EXPECT_EQ(kSenderSsrc, parser.tmmbn()->Ssrc());
+  EXPECT_EQ(2, parser.tmmbn_items()->num_packets());
+  EXPECT_EQ(kRemoteSsrc, parser.tmmbn_items()->Ssrc(0));
+  EXPECT_EQ(312U, parser.tmmbn_items()->BitrateKbps(0));
+  EXPECT_EQ(60U, parser.tmmbn_items()->Overhead(0));
+  EXPECT_EQ(kRemoteSsrc + 1, parser.tmmbn_items()->Ssrc(1));
+  EXPECT_EQ(1288U, parser.tmmbn_items()->BitrateKbps(1));
+  EXPECT_EQ(40U, parser.tmmbn_items()->Overhead(1));
+}
+
+TEST(RtcpPacketTest, TmmbnWithTooManyItems) {
+  Tmmbn tmmbn;
+  tmmbn.From(kSenderSsrc);
+  const int kMaxTmmbrItems = 50;
+  for (int i = 0; i < kMaxTmmbrItems; ++i)
+    EXPECT_TRUE(tmmbn.WithTmmbr(kRemoteSsrc + i, 312, 60));
+
+  EXPECT_FALSE(tmmbn.WithTmmbr(kRemoteSsrc + kMaxTmmbrItems, 312, 60));
+}
+
+}  // namespace webrtc