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// Copyright 2013 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 "content/renderer/media/webaudiosourceprovider_impl.h"
#include "media/audio/audio_parameters.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"
#include "third_party/WebKit/public/web/WebAudioSourceProviderClient.h"
namespace content {
namespace {
const float kTestVolume = 0.25;
} // namespace
class WebAudioSourceProviderImplTest
: public testing::Test,
public WebKit::WebAudioSourceProviderClient {
public:
WebAudioSourceProviderImplTest()
: params_(media::AudioParameters::AUDIO_PCM_LINEAR,
media::CHANNEL_LAYOUT_STEREO, 48000, 16, 64),
fake_callback_(0.1),
mock_sink_(new media::MockAudioRendererSink()),
wasp_impl_(new WebAudioSourceProviderImpl(mock_sink_)) {
}
virtual ~WebAudioSourceProviderImplTest() {}
void CallAllSinkMethodsAndVerify(bool verify) {
testing::InSequence s;
EXPECT_CALL(*mock_sink_.get(), Start()).Times(verify);
wasp_impl_->Start();
EXPECT_CALL(*mock_sink_.get(), Play()).Times(verify);
wasp_impl_->Play();
EXPECT_CALL(*mock_sink_.get(), Pause()).Times(verify);
wasp_impl_->Pause();
EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume)).Times(verify);
wasp_impl_->SetVolume(kTestVolume);
EXPECT_CALL(*mock_sink_.get(), Stop()).Times(verify);
wasp_impl_->Stop();
testing::Mock::VerifyAndClear(mock_sink_.get());
}
void SetClient(WebKit::WebAudioSourceProviderClient* client) {
testing::InSequence s;
if (client) {
EXPECT_CALL(*mock_sink_.get(), Stop());
EXPECT_CALL(*this, setFormat(params_.channels(), params_.sample_rate()));
}
wasp_impl_->setClient(client);
testing::Mock::VerifyAndClear(mock_sink_.get());
testing::Mock::VerifyAndClear(this);
}
bool CompareBusses(const media::AudioBus* bus1, const media::AudioBus* bus2) {
EXPECT_EQ(bus1->channels(), bus2->channels());
EXPECT_EQ(bus1->frames(), bus2->frames());
for (int ch = 0; ch < bus1->channels(); ++ch) {
if (memcmp(bus1->channel(ch), bus2->channel(ch),
sizeof(*bus1->channel(ch)) * bus1->frames()) != 0) {
return false;
}
}
return true;
}
// WebKit::WebAudioSourceProviderClient implementation.
MOCK_METHOD2(setFormat, void(size_t numberOfChannels, float sampleRate));
protected:
media::AudioParameters params_;
media::FakeAudioRenderCallback fake_callback_;
scoped_refptr<media::MockAudioRendererSink> mock_sink_;
scoped_refptr<WebAudioSourceProviderImpl> wasp_impl_;
DISALLOW_COPY_AND_ASSIGN(WebAudioSourceProviderImplTest);
};
TEST_F(WebAudioSourceProviderImplTest, SetClientBeforeInitialize) {
// setClient() with a NULL client should do nothing if no client is set.
wasp_impl_->setClient(NULL);
EXPECT_CALL(*mock_sink_.get(), Stop());
wasp_impl_->setClient(this);
// When Initialize() is called after setClient(), the params should propagate
// to the client via setFormat() during the call.
EXPECT_CALL(*this, setFormat(params_.channels(), params_.sample_rate()));
wasp_impl_->Initialize(params_, &fake_callback_);
// setClient() with the same client should do nothing.
wasp_impl_->setClient(this);
}
// Verify AudioRendererSink functionality w/ and w/o a client.
TEST_F(WebAudioSourceProviderImplTest, SinkMethods) {
wasp_impl_->Initialize(params_, &fake_callback_);
ASSERT_EQ(mock_sink_->callback(), &fake_callback_);
// Without a client all WASP calls should fall through to the underlying sink.
CallAllSinkMethodsAndVerify(true);
// With a client no calls should reach the Stop()'d sink. Also, setClient()
// should propagate the params provided during Initialize() at call time.
SetClient(this);
CallAllSinkMethodsAndVerify(false);
// Removing the client should cause WASP to revert to the underlying sink.
EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume));
SetClient(NULL);
CallAllSinkMethodsAndVerify(true);
}
// Verify underlying sink state is restored after client removal.
TEST_F(WebAudioSourceProviderImplTest, SinkStateRestored) {
wasp_impl_->Initialize(params_, &fake_callback_);
// Verify state set before the client is set propagates back afterward.
EXPECT_CALL(*mock_sink_.get(), Start());
wasp_impl_->Start();
SetClient(this);
EXPECT_CALL(*mock_sink_.get(), SetVolume(1.0));
EXPECT_CALL(*mock_sink_.get(), Start());
SetClient(NULL);
// Verify state set while the client was attached propagates back afterward.
SetClient(this);
wasp_impl_->Play();
wasp_impl_->SetVolume(kTestVolume);
EXPECT_CALL(*mock_sink_.get(), SetVolume(kTestVolume));
EXPECT_CALL(*mock_sink_.get(), Start());
EXPECT_CALL(*mock_sink_.get(), Play());
SetClient(NULL);
}
// Test the AudioRendererSink state machine and its effects on provideInput().
TEST_F(WebAudioSourceProviderImplTest, ProvideInput) {
scoped_ptr<media::AudioBus> bus1 = media::AudioBus::Create(params_);
scoped_ptr<media::AudioBus> bus2 = media::AudioBus::Create(params_);
// Point the WebVector into memory owned by |bus1|.
WebKit::WebVector<float*> audio_data(static_cast<size_t>(bus1->channels()));
for (size_t i = 0; i < audio_data.size(); ++i)
audio_data[i] = bus1->channel(i);
// Verify provideInput() works before Initialize() and returns silence.
bus1->channel(0)[0] = 1;
bus2->Zero();
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
wasp_impl_->Initialize(params_, &fake_callback_);
SetClient(this);
// Verify provideInput() is muted prior to Start() and no calls to the render
// callback have occurred.
bus1->channel(0)[0] = 1;
bus2->Zero();
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
ASSERT_EQ(fake_callback_.last_audio_delay_milliseconds(), -1);
wasp_impl_->Start();
// Ditto for Play().
bus1->channel(0)[0] = 1;
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
ASSERT_EQ(fake_callback_.last_audio_delay_milliseconds(), -1);
wasp_impl_->Play();
// Now we should get real audio data.
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_FALSE(CompareBusses(bus1.get(), bus2.get()));
// Ensure volume adjustment is working.
fake_callback_.reset();
fake_callback_.Render(bus2.get(), 0);
bus2->Scale(kTestVolume);
fake_callback_.reset();
wasp_impl_->SetVolume(kTestVolume);
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
// Pause should return to silence.
wasp_impl_->Pause();
bus1->channel(0)[0] = 1;
bus2->Zero();
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
wasp_impl_->Play();
// Play should return real audio data again...
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_FALSE(CompareBusses(bus1.get(), bus2.get()));
// Stop() should return silence.
wasp_impl_->Stop();
bus1->channel(0)[0] = 1;
wasp_impl_->provideInput(audio_data, params_.frames_per_buffer());
ASSERT_TRUE(CompareBusses(bus1.get(), bus2.get()));
}
} // namespace content
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