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/*
* Copyright (c) 2015 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/dlrr.h"
#include <cstddef>
#include <cstdint>
#include <cstring>
#include "modules/rtp_rtcp/source/byte_io.h"
#include "test/gtest.h"
using webrtc::rtcp::Dlrr;
using webrtc::rtcp::ReceiveTimeInfo;
namespace webrtc {
namespace {
const uint32_t kSsrc = 0x12345678;
const uint32_t kLastRR = 0x23344556;
const uint32_t kDelay = 0x33343536;
const uint8_t kBlock[] = {0x05, 0x00, 0x00, 0x03, 0x12, 0x34, 0x56, 0x78,
0x23, 0x34, 0x45, 0x56, 0x33, 0x34, 0x35, 0x36};
const size_t kBlockSizeBytes = sizeof(kBlock);
} // namespace
TEST(RtcpPacketDlrrTest, Empty) {
Dlrr dlrr;
EXPECT_EQ(0u, dlrr.BlockLength());
}
TEST(RtcpPacketDlrrTest, Create) {
Dlrr dlrr;
dlrr.AddDlrrItem(ReceiveTimeInfo(kSsrc, kLastRR, kDelay));
ASSERT_EQ(kBlockSizeBytes, dlrr.BlockLength());
uint8_t buffer[kBlockSizeBytes];
dlrr.Create(buffer);
EXPECT_EQ(0, memcmp(buffer, kBlock, kBlockSizeBytes));
}
TEST(RtcpPacketDlrrTest, Parse) {
Dlrr dlrr;
uint16_t block_length = ByteReader<uint16_t>::ReadBigEndian(&kBlock[2]);
EXPECT_TRUE(dlrr.Parse(kBlock, block_length));
EXPECT_EQ(1u, dlrr.sub_blocks().size());
const ReceiveTimeInfo& block = dlrr.sub_blocks().front();
EXPECT_EQ(kSsrc, block.ssrc);
EXPECT_EQ(kLastRR, block.last_rr);
EXPECT_EQ(kDelay, block.delay_since_last_rr);
}
TEST(RtcpPacketDlrrTest, ParseFailsOnBadSize) {
const size_t kBigBufferSize = 0x100; // More than enough.
uint8_t buffer[kBigBufferSize];
buffer[0] = Dlrr::kBlockType;
buffer[1] = 0; // Reserved.
buffer[2] = 0; // Most significant size byte.
for (uint8_t size = 3; size < 6; ++size) {
buffer[3] = size;
Dlrr dlrr;
// Parse should be successful only when size is multiple of 3.
EXPECT_EQ(size % 3 == 0, dlrr.Parse(buffer, static_cast<uint16_t>(size)));
}
}
TEST(RtcpPacketDlrrTest, CreateAndParseManySubBlocks) {
const size_t kBufferSize = 0x1000; // More than enough.
const size_t kManyDlrrItems = 50;
uint8_t buffer[kBufferSize];
// Create.
Dlrr dlrr;
for (size_t i = 1; i <= kManyDlrrItems; ++i)
dlrr.AddDlrrItem(ReceiveTimeInfo(kSsrc + i, kLastRR + i, kDelay + i));
size_t used_buffer_size = dlrr.BlockLength();
ASSERT_LE(used_buffer_size, kBufferSize);
dlrr.Create(buffer);
// Parse.
Dlrr parsed;
uint16_t block_length = ByteReader<uint16_t>::ReadBigEndian(&buffer[2]);
EXPECT_EQ(used_buffer_size, (block_length + 1) * 4u);
EXPECT_TRUE(parsed.Parse(buffer, block_length));
EXPECT_EQ(kManyDlrrItems, parsed.sub_blocks().size());
}
} // namespace webrtc
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