Switch stream creation and closing in Chrome audio rendering from IPC to Mojo

content/browser/renderer_host/media/audio_renderer_host.h

Index: content/browser/renderer_host/media/audio_renderer_host.h
diff --git a/content/browser/renderer_host/media/audio_renderer_host.h b/content/browser/renderer_host/media/audio_renderer_host.h
index 4f2747be94790027c10675da740f38ef16530e7b..c28410caedbb71c21cb93a8d6ecd670fc12f0dd6 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.h
+++ b/content/browser/renderer_host/media/audio_renderer_host.h
@@ -51,10 +51,12 @@
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "content/browser/renderer_host/media/audio_output_device_enumerator.h"
 #include "content/common/content_export.h"
+#include "media/mojo/interfaces/audio_output.mojom.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
@@ -73,6 +75,8 @@ class AudioParameters;
 namespace content {
 
 class AudioMirroringManager;
+class AudioOutputImpl;
+class AudioOutputStreamImpl;
 class MediaInternals;
 class MediaStreamManager;
 class MediaStreamUIProxy;
@@ -88,6 +92,18 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
                     MediaStreamManager* media_stream_manager,
                     const ResourceContext::SaltCallback& salt_callback);
 
+  // Creates an audio output stream with the specified format.
+  // Upon success/failure, the peer is notified via the NotifyStreamCreated
+  // message.
+  virtual void CreateStream(
+      int stream_id,
+      int render_frame_id,
+      const media::AudioParameters& params,
+      const media::mojom::AudioOutput::CreateStreamCallback& callback);
+
+  // Close the audio stream referenced by |stream_id|.
+  virtual void CloseStream(int stream_id);
+
   // Calls |callback| with the list of AudioOutputControllers for this object.
   void GetOutputControllers(
       const RenderProcessHost::GetAudioOutputControllersCallback&
@@ -106,12 +122,22 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // |render_frame_id| are actively playing. Can be called from any thread.
   bool RenderFrameHasActiveAudio(int render_frame_id) const;
 
+  virtual AudioOutputImpl* get_audio_output_impl(int render_frame_id) const;
+
+  virtual void set_audio_output_impl(int render_frame_id,
+                                     AudioOutputImpl* audio_output_impl);
+
  private:
+  friend class AudioEntry;
+  friend class AudioOutputImplTest;
   friend class AudioRendererHostTest;
-  friend class BrowserThread;
   friend class base::DeleteHelper<AudioRendererHost>;
+  friend class BrowserThread;
   friend class MockAudioRendererHost;
+  friend class MockAudioOutputAudioRendererHost;
+  friend class MockAudioOutputStreamAudioRendererHost;
   friend class TestAudioRendererHost;
+
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, CreateMockStream);
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, MockStreamDataConversation);
 
@@ -149,22 +175,12 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
                                     const std::string& device_id,
                                     const url::Origin& security_origin);
 
-  // Creates an audio output stream with the specified format.
-  // Upon success/failure, the peer is notified via the NotifyStreamCreated
-  // message.
-  void OnCreateStream(int stream_id,
-                      int render_frame_id,
-                      const media::AudioParameters& params);
-
   // Play the audio stream referenced by |stream_id|.
   void OnPlayStream(int stream_id);
 
   // Pause the audio stream referenced by |stream_id|.
   void OnPauseStream(int stream_id);
 
-  // Close the audio stream referenced by |stream_id|.
-  void OnCloseStream(int stream_id);
-
   // Set the volume of the audio stream referenced by |stream_id|.
   void OnSetVolume(int stream_id, double volume);
 
@@ -183,15 +199,21 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
 
   // Start the actual creation of an audio stream, after the device
   // authorization process is complete.
-  void DoCreateStream(int stream_id,
-                      int render_frame_id,
-                      const media::AudioParameters& params,
-                      const std::string& device_unique_id);
+  virtual void DoCreateStream(
+      int stream_id,
+      int render_frame_id,
+      const media::AudioParameters& params,
+      const std::string& device_unique_id,
+      const media::mojom::AudioOutput::CreateStreamCallback&
+          create_stream_callback);
 
   // Complete the process of creating an audio stream. This will set up the
   // shared memory or shared socket in low latency mode and send the
   // NotifyStreamCreated message to the peer.
-  void DoCompleteCreation(int stream_id);
+  virtual void DoCompleteCreation(
+      int stream_id,
+      const media::mojom::AudioOutput::CreateStreamCallback&
+          create_stream_callback);
 
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
@@ -205,9 +227,14 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // AudioOutputController after it has closed.
   void DeleteEntry(std::unique_ptr<AudioEntry> entry);
 
-  // Send an error message to the renderer, then close the stream.
+  // Send an error message to the client, then close the stream.
   void ReportErrorAndClose(int stream_id);
 
+  // Send an error message to the renderer, then close the stream.
+  void ReportErrorAndCloseStream(
+      int stream_id,
+      const media::mojom::AudioOutput::CreateStreamCallback& callback);
+
   // A helper method to look up a AudioEntry identified by |stream_id|.
   // Returns NULL if not found.
   AudioEntry* LookupById(int stream_id);
@@ -243,6 +270,8 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   media::AudioManager* const audio_manager_;
   AudioMirroringManager* const mirroring_manager_;
   std::unique_ptr<media::AudioLog> audio_log_;
+  std::map<int, AudioOutputImpl*> audio_output_impls_;
+  std::map<int, int> renderer_frame_ids_;
 
   // Used to access to AudioInputDeviceManager.
   MediaStreamManager* media_stream_manager_;