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/*
* 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 "modules/rtp_rtcp/source/rtcp_packet/remb.h"
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <iterator>
#include <vector>
#include "rtc_base/buffer.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/rtcp_packet_parser.h"
using ::testing::ElementsAreArray;
using ::testing::IsEmpty;
using ::testing::make_tuple;
using webrtc::rtcp::Remb;
namespace webrtc {
namespace {
constexpr uint32_t kSenderSsrc = 0x12345678;
constexpr uint32_t kRemoteSsrcs[] = {0x23456789, 0x2345678a, 0x2345678b};
constexpr uint32_t kBitrateBps = 0x3fb93 * 2; // 522022;
constexpr int64_t kBitrateBps64bit = int64_t{0x3fb93} << 30;
constexpr uint8_t kPacket[] = {0x8f, 206, 0x00, 0x07, 0x12, 0x34, 0x56, 0x78,
0x00, 0x00, 0x00, 0x00, 'R', 'E', 'M', 'B',
0x03, 0x07, 0xfb, 0x93, 0x23, 0x45, 0x67, 0x89,
0x23, 0x45, 0x67, 0x8a, 0x23, 0x45, 0x67, 0x8b};
constexpr size_t kPacketLength = sizeof(kPacket);
} // namespace
TEST(RtcpPacketRembTest, Create) {
Remb remb;
remb.SetSenderSsrc(kSenderSsrc);
remb.SetSsrcs(
std::vector<uint32_t>(std::begin(kRemoteSsrcs), std::end(kRemoteSsrcs)));
remb.SetBitrateBps(kBitrateBps);
Buffer packet = remb.Build();
EXPECT_THAT(make_tuple(packet.data(), packet.size()),
ElementsAreArray(kPacket));
}
TEST(RtcpPacketRembTest, Parse) {
Remb remb;
EXPECT_TRUE(test::ParseSinglePacket(kPacket, &remb));
const Remb& parsed = remb;
EXPECT_EQ(kSenderSsrc, parsed.sender_ssrc());
EXPECT_EQ(kBitrateBps, parsed.bitrate_bps());
EXPECT_THAT(parsed.ssrcs(), ElementsAreArray(kRemoteSsrcs));
}
TEST(RtcpPacketRembTest, CreateAndParseWithoutSsrcs) {
Remb remb;
remb.SetSenderSsrc(kSenderSsrc);
remb.SetBitrateBps(kBitrateBps);
Buffer packet = remb.Build();
Remb parsed;
EXPECT_TRUE(test::ParseSinglePacket(packet, &parsed));
EXPECT_EQ(kSenderSsrc, parsed.sender_ssrc());
EXPECT_EQ(kBitrateBps, parsed.bitrate_bps());
EXPECT_THAT(parsed.ssrcs(), IsEmpty());
}
TEST(RtcpPacketRembTest, CreateAndParse64bitBitrate) {
Remb remb;
remb.SetBitrateBps(kBitrateBps64bit);
Buffer packet = remb.Build();
Remb parsed;
EXPECT_TRUE(test::ParseSinglePacket(packet, &parsed));
EXPECT_EQ(kBitrateBps64bit, parsed.bitrate_bps());
}
TEST(RtcpPacketRembTest, ParseFailsOnTooSmallPacketToBeRemb) {
// Make it too small.
constexpr size_t kTooSmallSize = (1 + 3) * 4;
uint8_t packet[kTooSmallSize];
memcpy(packet, kPacket, kTooSmallSize);
packet[3] = 3;
Remb remb;
EXPECT_FALSE(test::ParseSinglePacket(packet, &remb));
}
TEST(RtcpPacketRembTest, ParseFailsWhenUniqueIdentifierIsNotRemb) {
uint8_t packet[kPacketLength];
memcpy(packet, kPacket, kPacketLength);
packet[12] = 'N'; // Swap 'R' -> 'N' in the 'REMB' unique identifier.
Remb remb;
EXPECT_FALSE(test::ParseSinglePacket(packet, &remb));
}
TEST(RtcpPacketRembTest, ParseFailsWhenBitrateDoNotFitIn64bits) {
uint8_t packet[kPacketLength];
memcpy(packet, kPacket, kPacketLength);
packet[17] |= 0xfc; // Set exponent component to maximum of 63.
packet[19] |= 0x02; // Ensure mantissa is at least 2.
Remb remb;
EXPECT_FALSE(test::ParseSinglePacket(packet, &remb));
}
TEST(RtcpPacketRembTest, ParseFailsWhenBitrateDoNotFitIn63bits) {
uint8_t packet[kPacketLength];
memcpy(packet, kPacket, kPacketLength);
packet[17] = 56 << 2; // Set exponent component to 56.
packet[18] = 0; // Set mantissa to 200 > 128
packet[19] = 200;
// Result value 200 * 2^56 can't be represented with int64_t and thus should
// be rejected.
Remb remb;
EXPECT_FALSE(test::ParseSinglePacket(packet, &remb));
}
TEST(RtcpPacketRembTest, ParseFailsWhenSsrcCountMismatchLength) {
uint8_t packet[kPacketLength];
memcpy(packet, kPacket, kPacketLength);
packet[16]++; // Swap 3 -> 4 in the ssrcs count.
Remb remb;
EXPECT_FALSE(test::ParseSinglePacket(packet, &remb));
}
TEST(RtcpPacketRembTest, TooManySsrcs) {
Remb remb;
EXPECT_FALSE(remb.SetSsrcs(
std::vector<uint32_t>(Remb::kMaxNumberOfSsrcs + 1, kRemoteSsrcs[0])));
EXPECT_TRUE(remb.SetSsrcs(
std::vector<uint32_t>(Remb::kMaxNumberOfSsrcs, kRemoteSsrcs[0])));
}
} // namespace webrtc
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