Mojo interfaces needed for switching audio rendering stream creation and closing from IPC to Mojo

content/browser/renderer_host/media/audio_renderer_host.h

 // 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.
 //
 // AudioRendererHost serves audio related requests from AudioRenderer which
 // lives inside the render process and provide access to audio hardware.
 //
 // This class is owned by RenderProcessHostImpl, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread, so we
 // need to be extra careful about the lifetime of this object. AudioManager is a
@@ skipping 33 matching lines @@
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "base/atomic_ref_count.h"
 #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 "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/resource_context.h"
 #include "media/audio/audio_io.h"
 #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 {
 class AudioManager;
 class AudioParameters;
 }
 
 namespace content {
 
 class AudioMirroringManager;
+class AudioOutputImpl;
+class AudioOutputStreamImpl;
+class AudioRendererHost;
 class MediaInternals;
 class MediaStreamManager;
 class MediaStreamUIProxy;
 class ResourceContext;
 
 class CONTENT_EXPORT AudioRendererHost : public BrowserMessageFilter {
  public:
+class CONTENT_EXPORT AudioEntry

[Henrik Grunell, 2016/04/19 15:36:09]

Why does it have to be moved to the header?

[rchtara, 2016/04/21 09:10:18]

Because, I'm using the AudioEntry in the audio_output_impl.h
But, as we are not going to do that in this cl, I will cancel this.

[Henrik Grunell, 2016/04/22 08:23:03]

Acknowledged.

+    : 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,
                     AudioMirroringManager* mirroring_manager,
                     MediaInternals* media_internals,
                     MediaStreamManager* media_stream_manager,
                     const ResourceContext::SaltCallback& salt_callback);
 
   // Calls |callback| with the list of AudioOutputControllers for this object.
   void GetOutputControllers(
       const RenderProcessHost::GetAudioOutputControllersCallback&
           callback) const;
 
   // BrowserMessageFilter implementation.
   void OnChannelClosing() override;
   void OnDestruct() const override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // Returns true if any streams managed by this host are actively playing.  Can
   // be called from any thread.
   bool HasActiveAudio();
 
   // Returns true if any streams managed by the RenderFrame identified by
   // |render_frame_id| are actively playing. Can be called from any thread.
   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>;
   friend class MockAudioRendererHost;
   friend class TestAudioRendererHost;
   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.
   // |have_access| is true only if there is permission to access the device.
   typedef base::Callback<void(bool have_access)> OutputDeviceAccessCB;
 
   // Internal callback type for information requests about an output device.
   // |success| indicates the operation was successful. If true, |device_info|
   // contains data about the device.
   typedef base::Callback<void(bool success,
@@ skipping 18 matching lines @@
                                     int render_frame_id,
                                     int session_id,
                                     const std::string& device_id,
                                     const url::Origin& gurl_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);
+                      const media::AudioParameters& params,
+                      const mojom::AudioOutput::CreateStreamCallback& callback);
 
   // 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);
 
@@ skipping 11 matching lines @@
   // Proceed with device authorization after translating device ID.
   void OnDeviceIDTranslated(int stream_id,
                             bool device_found,
                             const AudioOutputDeviceInfo& device_info);
 
   // 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);
+                      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);
 
   RenderProcessHost::AudioOutputControllerList DoGetOutputControllers() const;
 
   // Send an error message to the renderer.
   void SendErrorMessage(int stream_id);
 
   // Delete an audio entry, notifying observers first.  This is called by
   // AudioOutputController after it has closed.
   void DeleteEntry(std::unique_ptr<AudioEntry> entry);
 
   // 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);
 
   // A helper method to update the number of playing streams and alert the
   // ResourceScheduler when the renderer starts or stops playing an audiostream.
   void UpdateNumPlayingStreams(AudioEntry* entry, bool is_playing);
 
   // Check if the renderer process has access to the requested output device.
   void CheckOutputDeviceAccess(int render_frame_id,
@@ skipping 15 matching lines @@
   // Helper method to check if the authorization procedure for stream
   // |stream_id| has started.
   bool IsAuthorizationStarted(int stream_id);
 
   // ID of the RenderProcessHost that owns this instance.
   const int render_process_id_;
 
   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_;
 
   // A map of stream IDs to audio sources.
   AudioEntryMap audio_entries_;
 
   // The number of streams in the playing state. Atomic read safe from any
   // thread, but should only be updated from the IO thread.
   base::AtomicRefCount num_playing_streams_;
 
   // Salt required to translate renderer device IDs to raw device unique IDs
   ResourceContext::SaltCallback salt_callback_;
 
   // Map of device authorizations for streams that are not yet created
   // The key is the stream ID, and the value is a pair. The pair's first element
   // is a bool that is true if the authorization process completes successfully.
   // The second element contains the unique ID of the authorized device.
   std::map<int, std::pair<bool, std::string>> authorizations_;
 
   // The maximum number of simultaneous streams during the lifetime of this
   // host. Reported as UMA stat at shutdown.
   size_t max_simultaneous_streams_;
 
+  mojom::AudioOutputStreamPtr stream_ptr_;
+
   DISALLOW_COPY_AND_ASSIGN(AudioRendererHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_RENDERER_HOST_H_