MediaStream audio: Refactor 3 separate "glue" implementations into one.

content/renderer/media/speech_recognition_audio_sink_unittest.cc

 // Copyright 2014 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/speech_recognition_audio_sink.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
-#include "base/strings/utf_string_conversions.h"
 #include "content/renderer/media/media_stream_audio_source.h"
-#include "content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h"
-#include "content/renderer/media/webrtc_local_audio_track.h"
+#include "content/renderer/media/media_stream_audio_track.h"
+#include "content/renderer/media/webrtc/mock_peer_connection_dependency_factory.h"
 #include "media/base/audio_bus.h"
 #include "media/base/audio_parameters.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
+#include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebHeap.h"
 
 namespace {
 
 // Supported speech recognition audio parameters.
 const int kSpeechRecognitionSampleRate = 16000;
 const int kSpeechRecognitionFramesPerBuffer = 1600;
 
 // Input audio format.
 const media::AudioParameters::Format kInputFormat =
@@ skipping 164 matching lines @@
   // Audio bus wrapping the shared memory from the renderer.
   std::unique_ptr<media::AudioBus> audio_track_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeSpeechRecognizer);
 };
 
 }  // namespace
 
 namespace content {
 
+namespace {
+
+class TestDrivenAudioSource : public MediaStreamAudioSource {
+ public:
+  TestDrivenAudioSource() : MediaStreamAudioSource(true) {}
+  ~TestDrivenAudioSource() final {}
+
+  // Expose protected methods as public for testing.
+  using MediaStreamAudioSource::SetFormat;
+  using MediaStreamAudioSource::DeliverDataToTracks;
+};
+
+}  // namespace
+
 class SpeechRecognitionAudioSinkTest : public testing::Test {
  public:
   SpeechRecognitionAudioSinkTest() {}
 
   ~SpeechRecognitionAudioSinkTest() {
+    blink_source_.reset();
+    blink_track_.reset();
     speech_audio_sink_.reset();
     blink::WebHeap::collectAllGarbageForTesting();
   }
 
   // Initializes the producer and consumer with specified audio parameters.
   // Returns the minimal number of input audio buffers which need to be captured
   // before they get sent to the consumer.
   uint32_t Initialize(int input_sample_rate,
                       int input_frames_per_buffer,
                       int output_sample_rate,
                       int output_frames_per_buffer) {
     // Audio Environment setup.
     source_params_.Reset(kInputFormat,
                          kInputChannelLayout,
                          input_sample_rate,
                          kInputBitsPerSample,
                          input_frames_per_buffer);
     sink_params_.Reset(kOutputFormat,
                        kOutputChannelLayout,
                        output_sample_rate,
                        kOutputBitsPerSample,
                        output_frames_per_buffer);
     source_bus_ =
         media::AudioBus::Create(kInputChannels, input_frames_per_buffer);
     source_bus_->Zero();
     first_frame_capture_time_ = base::TimeTicks::Now();
     sample_frames_captured_ = 0;
 
     // Prepare the track and audio source.
-    blink::WebMediaStreamTrack blink_track;
-    PrepareBlinkTrackOfType(MEDIA_DEVICE_AUDIO_CAPTURE, &blink_track);
-
-    // Get the native track from the blink track and initialize.
-    native_track_ =
-        static_cast<WebRtcLocalAudioTrack*>(blink_track.getExtraData());
-    native_track_->OnSetFormat(source_params_);
+    PrepareBlinkTrackOfType(MEDIA_DEVICE_AUDIO_CAPTURE, &blink_track_);
+    blink_source_ = blink_track_.source();
+    static_cast<TestDrivenAudioSource*>(
+        MediaStreamAudioSource::From(blink_source_))->SetFormat(source_params_);
 
     // Create and initialize the consumer.
     recognizer_.reset(new FakeSpeechRecognizer());
     base::SharedMemoryHandle foreign_memory_handle;
-    recognizer_->Initialize(blink_track, sink_params_, &foreign_memory_handle);
+    recognizer_->Initialize(blink_track_, sink_params_, &foreign_memory_handle);
 
     // Create the producer.
     std::unique_ptr<base::SyncSocket> sending_socket(
         recognizer_->sending_socket());
     speech_audio_sink_.reset(new SpeechRecognitionAudioSink(
-        blink_track, sink_params_, foreign_memory_handle,
+        blink_track_, sink_params_, foreign_memory_handle,
         std::move(sending_socket),
         base::Bind(&SpeechRecognitionAudioSinkTest::StoppedCallback,
                    base::Unretained(this))));
 
     // Return number of buffers needed to trigger resampling and consumption.
     return static_cast<uint32_t>(std::ceil(
         static_cast<double>(output_frames_per_buffer * input_sample_rate) /
         (input_frames_per_buffer * output_sample_rate)));
   }
 
   // Mock callback expected to be called when the track is stopped.
   MOCK_METHOD0(StoppedCallback, void());
 
  protected:
   // Prepares a blink track of a given MediaStreamType and attaches the native
   // track which can be used to capture audio data and pass it to the producer.
-  static void PrepareBlinkTrackOfType(
-      const MediaStreamType device_type,
-      blink::WebMediaStreamTrack* blink_track) {
-    scoped_refptr<WebRtcLocalAudioTrackAdapter> adapter(
-        WebRtcLocalAudioTrackAdapter::Create(std::string(), NULL));
-    std::unique_ptr<WebRtcLocalAudioTrack> native_track(
-        new WebRtcLocalAudioTrack(adapter.get()));
-    blink::WebMediaStreamSource blink_audio_source;
-    blink_audio_source.initialize(base::UTF8ToUTF16("dummy_source_id"),
-                                  blink::WebMediaStreamSource::TypeAudio,
-                                  base::UTF8ToUTF16("dummy_source_name"),
-                                  false /* remote */, true /* readonly */);
-    MediaStreamSource::SourceStoppedCallback cb;
-    blink_audio_source.setExtraData(new MediaStreamAudioSource(
-        -1, StreamDeviceInfo(device_type, "Mock device", "mock_device_id"), cb,
-        nullptr));
+  void PrepareBlinkTrackOfType(const MediaStreamType device_type,
+                               blink::WebMediaStreamTrack* blink_track) {
+    blink::WebMediaStreamSource blink_source;
+    blink_source.initialize(blink::WebString::fromUTF8("dummy_source_id"),
+                            blink::WebMediaStreamSource::TypeAudio,
+                            blink::WebString::fromUTF8("dummy_source_name"),
+                            false /* remote */, true /* readonly */);
+    TestDrivenAudioSource* const audio_source = new TestDrivenAudioSource();
+    audio_source->SetDeviceInfo(
+        StreamDeviceInfo(device_type, "Mock device", "mock_device_id"));
+    blink_source.setExtraData(audio_source);  // Takes ownership.
+
     blink_track->initialize(blink::WebString::fromUTF8("dummy_track"),
-                            blink_audio_source);
-    blink_track->setExtraData(native_track.release());
+                            blink_source);
+    ASSERT_TRUE(audio_source->ConnectToTrack(*blink_track));
   }
 
   // Emulates an audio capture device capturing data from the source.
   inline void CaptureAudio(const uint32_t buffers) {
     for (uint32_t i = 0; i < buffers; ++i) {
       const base::TimeTicks estimated_capture_time = first_frame_capture_time_ +
           (sample_frames_captured_ * base::TimeDelta::FromSeconds(1) /
                source_params_.sample_rate());
-      native_track()->Capture(*source_bus_, estimated_capture_time);
+      static_cast<TestDrivenAudioSource*>(
+          MediaStreamAudioSource::From(blink_source_))
+              ->DeliverDataToTracks(*source_bus_, estimated_capture_time);
       sample_frames_captured_ += source_bus_->frames();
     }
   }
 
   // Used to simulate a problem with sockets.
   void SetFailureModeOnForeignSocket(bool in_failure_mode) {
     recognizer()->sending_socket()->SetFailureMode(in_failure_mode);
   }
 
   // Helper method for verifying captured audio data has been consumed.
@@ skipping 33 matching lines @@
           << ")";
     }
   }
 
   media::AudioBus* source_bus() const { return source_bus_.get(); }
 
   FakeSpeechRecognizer* recognizer() const { return recognizer_.get(); }
 
   const media::AudioParameters& sink_params() const { return sink_params_; }
 
-  WebRtcLocalAudioTrack* native_track() const { return native_track_; }
+  MediaStreamAudioTrack* native_track() const {
+    return MediaStreamAudioTrack::From(blink_track_);
+  }
 
  private:
+  MockPeerConnectionDependencyFactory mock_dependency_factory_;
+
   // Producer.
   std::unique_ptr<SpeechRecognitionAudioSink> speech_audio_sink_;
 
   // Consumer.
   std::unique_ptr<FakeSpeechRecognizer> recognizer_;
 
   // Audio related members.
   std::unique_ptr<media::AudioBus> source_bus_;
   media::AudioParameters source_params_;
   media::AudioParameters sink_params_;
-  WebRtcLocalAudioTrack* native_track_;
+  blink::WebMediaStreamSource blink_source_;
+  blink::WebMediaStreamTrack blink_track_;
 
   base::TimeTicks first_frame_capture_time_;
   int64_t sample_frames_captured_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionAudioSinkTest);
 };
 
 // Not all types of tracks are supported. This test checks if that policy is
 // implemented correctly.
 TEST_F(SpeechRecognitionAudioSinkTest, CheckIsSupportedAudioTrack) {
@@ skipping 141 matching lines @@
   const uint32_t buffers_per_notification = Initialize(44100, 441, 16000, 1600);
   AssertConsumedBuffers(0U);
   CaptureAudioAndAssertConsumedBuffers(buffers_per_notification, 1U);
   EXPECT_CALL(*this, StoppedCallback()).Times(1);
 
   native_track()->Stop();
   CaptureAudioAndAssertConsumedBuffers(buffers_per_notification, 1U);
 }
 
 }  // namespace content