Collapse AudioRendererMixer and OnMoreDataResampler into AudioTransform.

media/base/audio_renderer_mixer_input_unittest.cc

 // 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"
@@ skipping 11 matching lines @@
  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();
   }
 
+  float ProvideInput() {
+    return mixer_input_->ProvideAudioTransformInput(
+        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 callback() works as expected.
-TEST_F(AudioRendererMixerInputTest, GetCallback) {
-  EXPECT_EQ(mixer_input_->callback(), fake_callback_.get());
-}
+// 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();
 
-// Test that getting and setting the volume work as expected.
-TEST_F(AudioRendererMixerInputTest, GetSetVolume) {
-  // Starting volume should be 0.
-  double volume = 1.0f;
-  mixer_input_->GetVolume(&volume);
-  EXPECT_EQ(volume, 1.0f);
+  // Starting volume should be 1.0.
+  EXPECT_FLOAT_EQ(ProvideInput(), 1);
 
-  const double kVolume = 0.5f;
+  const double kVolume = 0.5;
   EXPECT_TRUE(mixer_input_->SetVolume(kVolume));
-  mixer_input_->GetVolume(&volume);
-  EXPECT_EQ(volume, kVolume);
+  EXPECT_FLOAT_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();
-  EXPECT_FALSE(mixer_input_->playing());
+  EXPECT_FLOAT_EQ(ProvideInput(), 0);
   mixer_input_->Play();
-  EXPECT_TRUE(mixer_input_->playing());
+  EXPECT_FLOAT_EQ(ProvideInput(), 1);
   mixer_input_->Pause(false);
-  EXPECT_FALSE(mixer_input_->playing());
+  EXPECT_FLOAT_EQ(ProvideInput(), 0);
   mixer_input_->Play();
-  EXPECT_TRUE(mixer_input_->playing());
+  EXPECT_FLOAT_EQ(ProvideInput(), 1);
   mixer_input_->Stop();
-  EXPECT_FALSE(mixer_input_->playing());
+  EXPECT_FLOAT_EQ(ProvideInput(), 0);
 }
 
 // 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