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// Copyright (c) 2012 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 "base/bind.h"
#include "base/bind_helpers.h"
#include "media/base/audio_renderer_mixer.h"
#include "media/base/audio_renderer_mixer_input.h"
#include "media/base/fake_audio_render_callback.h"
#include "media/base/mock_audio_renderer_sink.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
static const int kBitsPerChannel = 16;
static const int kSampleRate = 48000;
static const int kBufferSize = 8192;
static const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_STEREO;
class AudioRendererMixerInputTest : public testing::Test {
public:
AudioRendererMixerInputTest() {
audio_parameters_ = AudioParameters(
AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate,
kBitsPerChannel, kBufferSize);
CreateMixerInput();
fake_callback_.reset(new FakeAudioRenderCallback(0));
mixer_input_->Initialize(audio_parameters_, fake_callback_.get());
EXPECT_CALL(*this, RemoveMixer(testing::_));
audio_bus_ = AudioBus::Create(audio_parameters_);
}
void CreateMixerInput() {
mixer_input_ = new AudioRendererMixerInput(
base::Bind(
&AudioRendererMixerInputTest::GetMixer, base::Unretained(this)),
base::Bind(
&AudioRendererMixerInputTest::RemoveMixer, base::Unretained(this)));
}
AudioRendererMixer* GetMixer(const AudioParameters& params) {
if (!mixer_.get()) {
scoped_refptr<MockAudioRendererSink> sink = new MockAudioRendererSink();
EXPECT_CALL(*sink, Start());
EXPECT_CALL(*sink, Stop());
mixer_.reset(new AudioRendererMixer(
audio_parameters_, audio_parameters_, sink));
}
return mixer_.get();
}
double ProvideInput() {
return mixer_input_->ProvideInput(audio_bus_.get(), base::TimeDelta());
}
int GetAudioDelayMilliseconds() {
return mixer_input_->current_audio_delay_milliseconds_;
}
MOCK_METHOD1(RemoveMixer, void(const AudioParameters&));
protected:
virtual ~AudioRendererMixerInputTest() {}
AudioParameters audio_parameters_;
scoped_ptr<AudioRendererMixer> mixer_;
scoped_refptr<AudioRendererMixerInput> mixer_input_;
scoped_ptr<FakeAudioRenderCallback> fake_callback_;
scoped_ptr<AudioBus> audio_bus_;
DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerInputTest);
};
// Test that getting and setting the volume work as expected. The volume is
// returned from ProvideInput() only when playing.
TEST_F(AudioRendererMixerInputTest, GetSetVolume) {
mixer_input_->Start();
mixer_input_->Play();
// Starting volume should be 1.0.
EXPECT_DOUBLE_EQ(ProvideInput(), 1);
const double kVolume = 0.5;
EXPECT_TRUE(mixer_input_->SetVolume(kVolume));
EXPECT_DOUBLE_EQ(ProvideInput(), kVolume);
mixer_input_->Stop();
}
// Test Start()/Play()/Pause()/Stop()/playing() all work as expected. Also
// implicitly tests that AddMixerInput() and RemoveMixerInput() work without
// crashing; functional tests for these methods are in AudioRendererMixerTest.
TEST_F(AudioRendererMixerInputTest, StartPlayPauseStopPlaying) {
mixer_input_->Start();
mixer_input_->Play();
EXPECT_DOUBLE_EQ(ProvideInput(), 1);
mixer_input_->Pause(false);
mixer_input_->Play();
EXPECT_DOUBLE_EQ(ProvideInput(), 1);
mixer_input_->Stop();
}
// Test that Stop() can be called before Initialize() and Start().
TEST_F(AudioRendererMixerInputTest, StopBeforeInitializeOrStart) {
// |mixer_input_| was initialized during construction.
mixer_input_->Stop();
// Verify Stop() works without Initialize() or Start().
CreateMixerInput();
mixer_input_->Stop();
}
} // namespace media
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