Switch to pcm_low_latency and enable resampling.

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 "media/audio/audio_util.h"
 #include "media/audio/null_audio_sink.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 "testing/gtest/include/gtest/gtest.h"
 #include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
+// TODO(dalecurtis): Extract this out to a mock class,
+// used by AudioRendererImplTest too.
+class MockAudioSink : public media::AudioRendererSink {
+ public:
+  MOCK_METHOD2(Initialize, void(const media::AudioParameters& params,
+                                RenderCallback* callback));
+  MOCK_METHOD0(Start, void());
+  MOCK_METHOD0(Stop, void());
+  MOCK_METHOD1(Pause, void(bool flush));
+  MOCK_METHOD0(Play, void());
+  MOCK_METHOD1(SetPlaybackRate, void(float rate));
+  MOCK_METHOD1(SetVolume, bool(double volume));
+  MOCK_METHOD1(GetVolume, void(double* volume));
+
+ protected:
+  virtual ~MockAudioSink() {}
+};
+
 static const int kBitsPerChannel = 16;
 static const int kSampleRate = 48000;
 static const ChannelLayout kChannelLayout = CHANNEL_LAYOUT_STEREO;
 
-class AudioRendererMixerInputTest : public ::testing::Test {
+class AudioRendererMixerInputTest
+    : public AudioRendererSink::RenderCallback,
+      public ::testing::Test {
  public:
   AudioRendererMixerInputTest() {
     audio_parameters_ = AudioParameters(
         AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout, kSampleRate,
         kBitsPerChannel, GetHighLatencyOutputBufferSize(kSampleRate));
 
-    mixer_ = new AudioRendererMixer(audio_parameters_, new NullAudioSink());
+    sink_ = new MockAudioSink();
+    EXPECT_CALL(*sink_, Start());
+    EXPECT_CALL(*sink_, Stop());
+    EXPECT_CALL(*sink_, Initialize(::testing::_, ::testing::_));
+
+    mixer_ = new AudioRendererMixer(audio_parameters_, sink_);
     mixer_input_ = new AudioRendererMixerInput(mixer_);
-    fake_callback_.reset(new FakeAudioRenderCallback(audio_parameters_));
-    mixer_input_->Initialize(audio_parameters_, fake_callback_.get());
-  }
-
-  // Render audio_parameters_.frames_per_buffer() frames into |audio_data_| and
-  // verify the result against |check_value|.
-  void RenderAndValidateAudioData(float check_value) {
-    const std::vector<float*>& audio_data = mixer_input_->audio_data();
-
-    ASSERT_EQ(fake_callback_->Render(
-        audio_data, audio_parameters_.frames_per_buffer(), 0),
-        audio_parameters_.frames_per_buffer());
-
-    for (size_t i = 0; i < audio_data.size(); ++i)
-      for (int j = 0; j < audio_parameters_.frames_per_buffer(); j++)
-        ASSERT_FLOAT_EQ(check_value, audio_data[i][j]);
+    mixer_input_->Initialize(audio_parameters_, this);
   }
 
  protected:
   virtual ~AudioRendererMixerInputTest() {}
 
+  // AudioRendererSink::RenderCallback implementation.
+  MOCK_METHOD3(Render, int(const std::vector<float*>&, int, int));
+  MOCK_METHOD0(OnRenderError, void());
+
   AudioParameters audio_parameters_;
   scoped_refptr<AudioRendererMixer> mixer_;
   scoped_refptr<AudioRendererMixerInput> mixer_input_;
-  scoped_ptr<FakeAudioRenderCallback> fake_callback_;
+  scoped_refptr<MockAudioSink> sink_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerInputTest);
 };
 
+// Test callback() works as expected.
+TEST_F(AudioRendererMixerInputTest, GetCallback) {
+  EXPECT_EQ(mixer_input_->callback(), this);
+}
+
 // 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);
 
   const double kVolume = 0.5f;
   EXPECT_TRUE(mixer_input_->SetVolume(kVolume));
   mixer_input_->GetVolume(&volume);
   EXPECT_EQ(volume, kVolume);
 }
 
-// Test audio_data() is allocated correctly.
-TEST_F(AudioRendererMixerInputTest, GetAudioData) {
-  RenderAndValidateAudioData(fake_callback_->fill_value());
-
-  // TODO(dalecurtis): Perform alignment and size checks when we switch over to
-  // FFmpeg optimized vector_fmac.
-}
-
-// Test callback() works as expected.
-TEST_F(AudioRendererMixerInputTest, GetCallback) {
-  EXPECT_EQ(mixer_input_->callback(), fake_callback_.get());
-  RenderAndValidateAudioData(fake_callback_->fill_value());
-}
-
 // 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());
   mixer_input_->Play();
   EXPECT_TRUE(mixer_input_->playing());
   mixer_input_->Pause(false);
   EXPECT_FALSE(mixer_input_->playing());
   mixer_input_->Play();
   EXPECT_TRUE(mixer_input_->playing());
   mixer_input_->Stop();
   EXPECT_FALSE(mixer_input_->playing());
 }
 
 }  // namespace media