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// Copyright 2015 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 "remoting/host/audio_pump.h"
#include <stddef.h>
#include <utility>
#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "remoting/codec/audio_encoder.h"
#include "remoting/host/audio_capturer.h"
#include "remoting/proto/audio.pb.h"
#include "remoting/protocol/audio_stub.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace remoting {
namespace {
// Creates a dummy packet with 1k data
scoped_ptr<AudioPacket> MakeAudioPacket() {
scoped_ptr<AudioPacket> packet(new AudioPacket);
packet->add_data()->resize(1000);
return packet;
}
} // namespace
class FakeAudioCapturer : public AudioCapturer {
public:
FakeAudioCapturer() {}
~FakeAudioCapturer() override {}
bool Start(const PacketCapturedCallback& callback) override {
callback_ = callback;
return true;
}
const PacketCapturedCallback& callback() { return callback_; }
private:
PacketCapturedCallback callback_;
DISALLOW_COPY_AND_ASSIGN(FakeAudioCapturer);
};
class FakeAudioEncoder : public AudioEncoder {
public:
FakeAudioEncoder() {}
~FakeAudioEncoder() override {}
scoped_ptr<AudioPacket> Encode(scoped_ptr<AudioPacket> packet) override {
return packet;
}
int GetBitrate() override {
return 160000;
}
private:
DISALLOW_COPY_AND_ASSIGN(FakeAudioEncoder);
};
class AudioPumpTest : public testing::Test, public protocol::AudioStub {
public:
AudioPumpTest() {}
void SetUp() override;
void TearDown() override;
// protocol::AudioStub interface.
void ProcessAudioPacket(scoped_ptr<AudioPacket> audio_packet,
const base::Closure& done) override;
protected:
base::MessageLoop message_loop_;
// |capturer_| and |encoder_| are owned by the |pump_|.
FakeAudioCapturer* capturer_;
FakeAudioEncoder* encoder_;
scoped_ptr<AudioPump> pump_;
ScopedVector<AudioPacket> sent_packets_;
std::vector<base::Closure> done_closures_;
private:
DISALLOW_COPY_AND_ASSIGN(AudioPumpTest);
};
void AudioPumpTest::SetUp() {
capturer_ = new FakeAudioCapturer();
encoder_ = new FakeAudioEncoder();
pump_.reset(new AudioPump(message_loop_.task_runner(),
make_scoped_ptr(capturer_),
make_scoped_ptr(encoder_), this));
}
void AudioPumpTest::TearDown() {
pump_.reset();
// Let the message loop run to finish destroying the capturer.
base::RunLoop().RunUntilIdle();
}
void AudioPumpTest::ProcessAudioPacket(
scoped_ptr<AudioPacket> audio_packet,
const base::Closure& done) {
sent_packets_.push_back(std::move(audio_packet));
done_closures_.push_back(done);
}
// Verify that the pump pauses pumping when the network is congested.
TEST_F(AudioPumpTest, BufferSizeLimit) {
// Run message loop to let the pump start the capturer.
base::RunLoop().RunUntilIdle();
ASSERT_FALSE(capturer_->callback().is_null());
// Try sending 100 packets, 1k each. The pump should stop pumping and start
// dropping the data at some point.
for (size_t i = 0; i < 100; ++i) {
capturer_->callback().Run(MakeAudioPacket());
base::RunLoop().RunUntilIdle();
}
size_t num_sent_packets = sent_packets_.size();
EXPECT_LT(num_sent_packets, 100U);
EXPECT_GT(num_sent_packets, 0U);
// Call done closure for the first packet. This should allow one more packet
// to be sent below.
done_closures_.front().Run();
base::RunLoop().RunUntilIdle();
// Verify that the pump continues to send captured audio.
capturer_->callback().Run(MakeAudioPacket());
base::RunLoop().RunUntilIdle();
EXPECT_EQ(num_sent_packets + 1, sent_packets_.size());
}
} // namespace remoting
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