Mojo interfaces needed for switching audio rendering stream creation and closing 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 b4e9d3f329a009039635d0fc80ed1d0cba4e7133..3cbd11358fbcd0db4577c88780647e43248929c4 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.h
+++ b/content/browser/renderer_host/media/audio_renderer_host.h
@@ -51,6 +51,7 @@
 #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"
@@ -63,6 +64,7 @@
 #include "media/audio/audio_logging.h"
 #include "media/audio/audio_output_controller.h"
 #include "media/audio/simple_sources.h"
+#include "media/mojo/interfaces/audio_output.mojom.h"
 #include "url/origin.h"
 
 namespace media {
@@ -73,6 +75,9 @@ class AudioParameters;
 namespace content {
 
 class AudioMirroringManager;
+class AudioOutputImpl;
+class AudioOutputStreamImpl;
+class AudioRendererHost;
 class MediaInternals;
 class MediaStreamManager;
 class MediaStreamUIProxy;
@@ -80,6 +85,70 @@ class ResourceContext;
 
 class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
  public:
+class CONTENT_EXPORT AudioEntry
+    : public media::AudioOutputController::EventHandler {
+ public:
+  AudioEntry(AudioRendererHost* host,
+             int stream_id,
+             int render_frame_id,
+             const media::AudioParameters& params,
+             const std::string& output_device_id,
+             std::unique_ptr<base::SharedMemory> shared_memory,
+             std::unique_ptr<media::AudioOutputController::SyncReader> reader,
+             const mojom::AudioOutput::CreateStreamCallback& callback);
+
+    ~AudioEntry() override;
+
+    int stream_id() const { return stream_id_; }
+
+    int render_frame_id() const { return render_frame_id_; }
+
+    media::AudioOutputController* controller() const {
+      return controller_.get();
+    }
+
+    base::SharedMemory* shared_memory() { return shared_memory_.get(); }
+
+    media::AudioOutputController::SyncReader* reader() const {
+      return reader_.get();
+    }
+
+    bool playing() const { return playing_; }
+    void set_playing(bool playing) { playing_ = playing; }
+
+    void set_stream_ptr(AudioOutputStreamImpl* stream_ptr) {
+      stream_ptr_ = stream_ptr;
+    }
+    void OnError() override;
+
+   private:
+    friend class AudioRendererHost;
+    // media::AudioOutputController::EventHandler implementation.
+    void OnCreated(
+        const mojom::AudioOutput::CreateStreamCallback& callback) override;
+    void OnPlaying() override;
+    void OnPaused() override;
+
+    AudioRendererHost* const host_;
+    const int stream_id_;
+
+    // The routing ID of the source RenderFrame.
+    const int render_frame_id_;
+
+    // Shared memory for transmission of the audio data.  Used by |reader_|.
+    const std::unique_ptr<base::SharedMemory> shared_memory_;
+
+    // The synchronous reader to be used by |controller_|.
+    const std::unique_ptr<media::AudioOutputController::SyncReader> reader_;
+
+    // The AudioOutputController that manages the audio stream.
+    const scoped_refptr<media::AudioOutputController> controller_;
+
+    bool playing_;
+
+    AudioOutputStreamImpl* stream_ptr_;
+  };
+
   // Called from UI thread from the owner of this object.
   AudioRendererHost(int render_process_id,
                     media::AudioManager* audio_manager,
@@ -107,6 +176,9 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   bool RenderFrameHasActiveAudio(int render_frame_id) const;
 
  private:
+  friend class AudioEntry;
+  friend class AudioOutputImpl;
+  friend class AudioOutputStreamImpl;
   friend class AudioRendererHostTest;
   friend class BrowserThread;
   friend class base::DeleteHelper<AudioRendererHost>;
@@ -115,7 +187,6 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, CreateMockStream);
   FRIEND_TEST_ALL_PREFIXES(AudioRendererHostTest, MockStreamDataConversation);
 
-  class AudioEntry;
   typedef std::map<int, AudioEntry*> AudioEntryMap;
 
   // Internal callback type for access requests to output devices.
@@ -154,7 +225,8 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // message.
   void OnCreateStream(int stream_id,
                       int render_frame_id,
-                      const media::AudioParameters& params);
+                      const media::AudioParameters& params,
+                      const mojom::AudioOutput::CreateStreamCallback& callback);
 
   // Play the audio stream referenced by |stream_id|.
   void OnPlayStream(int stream_id);
@@ -186,12 +258,15 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   void DoCreateStream(int stream_id,
                       int render_frame_id,
                       const media::AudioParameters& params,
-                      const std::string& device_unique_id);
+                      const std::string& device_unique_id,
+                      const mojom::AudioOutput::CreateStreamCallback& 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);
+  void DoCompleteCreation(
+      int stream_id,
+      const mojom::AudioOutput::CreateStreamCallback& callback);
 
   // Send playing/paused status to the renderer.
   void DoNotifyStreamStateChanged(int stream_id, bool is_playing);
@@ -208,6 +283,11 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // Send an error message to the renderer, then close the stream.
   void ReportErrorAndClose(int stream_id);
 
+  // Send an error message to the renderer, then close the stream.
+  void ReportErrorAndCloseMojo(
+      int stream_id,
+      const 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 +323,7 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   media::AudioManager* const audio_manager_;
   AudioMirroringManager* const mirroring_manager_;
   std::unique_ptr<media::AudioLog> audio_log_;
+  AudioOutputImpl* audio_output_impl_;
 
   // Used to access to AudioInputDeviceManager.
   MediaStreamManager* media_stream_manager_;
@@ -267,6 +348,8 @@ class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
   // host. Reported as UMA stat at shutdown.
   size_t max_simultaneous_streams_;
 
+  mojom::AudioOutputStreamPtr stream_ptr_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };