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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/cast/net/rtp/rtp_packetizer.h"
#include <stdint.h>
#include "base/memory/scoped_ptr.h"
#include "base/test/simple_test_tick_clock.h"
#include "media/cast/logging/logging_impl.h"
#include "media/cast/logging/simple_event_subscriber.h"
#include "media/cast/net/pacing/paced_sender.h"
#include "media/cast/net/rtp/packet_storage.h"
#include "media/cast/net/rtp/rtp_header_parser.h"
#include "media/cast/test/fake_single_thread_task_runner.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace media {
namespace cast {
namespace {
static const int kPayload = 127;
static const uint32 kTimestampMs = 10;
static const uint16 kSeqNum = 33;
static const int kMaxPacketLength = 1500;
static const int kSsrc = 0x12345;
static const unsigned int kFrameSize = 5000;
}
class TestRtpPacketTransport : public PacketSender {
public:
explicit TestRtpPacketTransport(RtpPacketizerConfig config)
: config_(config),
sequence_number_(kSeqNum),
packets_sent_(0),
expected_number_of_packets_(0),
expected_packet_id_(0),
expected_frame_id_(0),
expectd_rtp_timestamp_(0) {}
void VerifyRtpHeader(const RtpCastTestHeader& rtp_header) {
VerifyCommonRtpHeader(rtp_header);
VerifyCastRtpHeader(rtp_header);
}
void VerifyCommonRtpHeader(const RtpCastTestHeader& rtp_header) {
EXPECT_EQ(kPayload, rtp_header.payload_type);
EXPECT_EQ(sequence_number_, rtp_header.sequence_number);
EXPECT_EQ(expectd_rtp_timestamp_, rtp_header.rtp_timestamp);
EXPECT_EQ(config_.ssrc, rtp_header.ssrc);
EXPECT_EQ(0, rtp_header.num_csrcs);
}
void VerifyCastRtpHeader(const RtpCastTestHeader& rtp_header) {
EXPECT_FALSE(rtp_header.is_key_frame);
EXPECT_EQ(expected_frame_id_, rtp_header.frame_id);
EXPECT_EQ(expected_packet_id_, rtp_header.packet_id);
EXPECT_EQ(expected_number_of_packets_ - 1, rtp_header.max_packet_id);
EXPECT_TRUE(rtp_header.is_reference);
EXPECT_EQ(expected_frame_id_ - 1u, rtp_header.reference_frame_id);
}
virtual bool SendPacket(PacketRef packet, const base::Closure& cb) OVERRIDE {
++packets_sent_;
RtpHeaderParser parser(packet->data.data(), packet->data.size());
RtpCastTestHeader rtp_header;
parser.Parse(&rtp_header);
VerifyRtpHeader(rtp_header);
++sequence_number_;
++expected_packet_id_;
return true;
}
size_t number_of_packets_received() const { return packets_sent_; }
void set_expected_number_of_packets(size_t expected_number_of_packets) {
expected_number_of_packets_ = expected_number_of_packets;
}
void set_rtp_timestamp(uint32 rtp_timestamp) {
expectd_rtp_timestamp_ = rtp_timestamp;
}
RtpPacketizerConfig config_;
uint32 sequence_number_;
size_t packets_sent_;
size_t number_of_packets_;
size_t expected_number_of_packets_;
// Assuming packets arrive in sequence.
int expected_packet_id_;
uint32 expected_frame_id_;
uint32 expectd_rtp_timestamp_;
DISALLOW_COPY_AND_ASSIGN(TestRtpPacketTransport);
};
class RtpPacketizerTest : public ::testing::Test {
protected:
RtpPacketizerTest()
: task_runner_(new test::FakeSingleThreadTaskRunner(&testing_clock_)),
video_frame_(),
packet_storage_(200) {
config_.sequence_number = kSeqNum;
config_.ssrc = kSsrc;
config_.payload_type = kPayload;
config_.max_payload_length = kMaxPacketLength;
transport_.reset(new TestRtpPacketTransport(config_));
pacer_.reset(new PacedSender(
&testing_clock_, &logging_, transport_.get(), task_runner_));
pacer_->RegisterVideoSsrc(config_.ssrc);
rtp_packetizer_.reset(new RtpPacketizer(
pacer_.get(), &packet_storage_, config_));
video_frame_.dependency = EncodedFrame::DEPENDENT;
video_frame_.frame_id = 0;
video_frame_.referenced_frame_id = kStartFrameId;
video_frame_.data.assign(kFrameSize, 123);
video_frame_.rtp_timestamp =
GetVideoRtpTimestamp(testing_clock_.NowTicks());
}
void RunTasks(int during_ms) {
for (int i = 0; i < during_ms; ++i) {
// Call process the timers every 1 ms.
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(1));
task_runner_->RunTasks();
}
}
base::SimpleTestTickClock testing_clock_;
scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
EncodedFrame video_frame_;
PacketStorage packet_storage_;
RtpPacketizerConfig config_;
scoped_ptr<TestRtpPacketTransport> transport_;
LoggingImpl logging_;
scoped_ptr<PacedSender> pacer_;
scoped_ptr<RtpPacketizer> rtp_packetizer_;
DISALLOW_COPY_AND_ASSIGN(RtpPacketizerTest);
};
TEST_F(RtpPacketizerTest, SendStandardPackets) {
size_t expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
transport_->set_expected_number_of_packets(expected_num_of_packets);
transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(kTimestampMs));
video_frame_.reference_time = testing_clock_.NowTicks();
rtp_packetizer_->SendFrameAsPackets(video_frame_);
RunTasks(33 + 1);
EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
}
TEST_F(RtpPacketizerTest, Stats) {
EXPECT_FALSE(rtp_packetizer_->send_packet_count());
EXPECT_FALSE(rtp_packetizer_->send_octet_count());
// Insert packets at varying lengths.
size_t expected_num_of_packets = kFrameSize / kMaxPacketLength + 1;
transport_->set_expected_number_of_packets(expected_num_of_packets);
transport_->set_rtp_timestamp(video_frame_.rtp_timestamp);
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(kTimestampMs));
video_frame_.reference_time = testing_clock_.NowTicks();
rtp_packetizer_->SendFrameAsPackets(video_frame_);
RunTasks(33 + 1);
EXPECT_EQ(expected_num_of_packets, rtp_packetizer_->send_packet_count());
EXPECT_EQ(kFrameSize, rtp_packetizer_->send_octet_count());
EXPECT_EQ(expected_num_of_packets, transport_->number_of_packets_received());
}
} // namespace cast
} // namespace media
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