IPC->mojo of audio_renderer_host

content/browser/renderer_host/media/audio_renderer_host.cc

Index: content/browser/renderer_host/media/audio_renderer_host.cc
diff --git a/content/browser/renderer_host/media/audio_renderer_host.cc b/content/browser/renderer_host/media/audio_renderer_host.cc
index a3ca23926826d8df32370f319ff0b3309dfe1617..baeb46edcd55bf27a1f2af29d70e6b0209385470 100644
--- a/content/browser/renderer_host/media/audio_renderer_host.cc
+++ b/content/browser/renderer_host/media/audio_renderer_host.cc
@@ -23,7 +23,6 @@
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
-#include "content/common/media/audio_messages.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/media_device_id.h"
 #include "content/public/browser/media_observer.h"
@@ -33,6 +32,11 @@
 #include "media/audio/audio_streams_tracker.h"
 #include "media/base/audio_bus.h"
 #include "media/base/limits.h"
+#include "media/mojo/interfaces/audio_output.mojom-shared.h"
+#include "media/mojo/interfaces/audio_output.mojom.h"
+#include "mojo/edk/embedder/embedder.h"
+#include "mojo/public/cpp/system/handle.h"
+#include "mojo/public/cpp/system/platform_handle.h"
 
 using media::AudioBus;
 using media::AudioManager;
@@ -47,7 +51,7 @@ base::LazyInstance<media::AudioStreamsTracker> g_audio_streams_tracker =
     LAZY_INSTANCE_INITIALIZER;
 
 std::pair<int, std::pair<bool, std::string>> MakeAuthorizationData(
-    int stream_id,
+    int32_t stream_id,
     bool authorized,
     const std::string& device_unique_id) {
   return std::make_pair(stream_id,
@@ -132,10 +136,11 @@ void ValidateRenderFrameId(int render_process_id,
 }  // namespace
 
 class AudioRendererHost::AudioEntry
-    : public media::AudioOutputController::EventHandler {
+    : public media::AudioOutputController::EventHandler,
+      private media::mojom::AudioOutputStream {
  public:
   AudioEntry(AudioRendererHost* host,
-             int stream_id,
+             int32_t stream_id,
              int render_frame_id,
              const media::AudioParameters& params,
              const std::string& output_device_id,
@@ -143,9 +148,7 @@ class AudioRendererHost::AudioEntry
              std::unique_ptr<media::AudioOutputController::SyncReader> reader);
   ~AudioEntry() override;
 
-  int stream_id() const {
-    return stream_id_;
-  }
+  int32_t stream_id() const { return stream_id_; }
 
   int render_frame_id() const { return render_frame_id_; }
 
@@ -162,6 +165,14 @@ class AudioRendererHost::AudioEntry
   bool playing() const { return playing_; }
   void set_playing(bool playing) { playing_ = playing; }
 
+  // media::mojom::AudioOutputStream implementation
+  void Play() override;
+  void Pause() override;
+  void SetVolume(double volume) override;
+
+  void OnConnectionError();
+  void BindRequest(media::mojom::AudioOutputStreamRequest);
+
  private:
   // media::AudioOutputController::EventHandler implementation.
   void OnCreated() override;
@@ -170,7 +181,7 @@ class AudioRendererHost::AudioEntry
   void OnError() override;
 
   AudioRendererHost* const host_;
-  const int stream_id_;
+  const int32_t stream_id_;
 
   // The routing ID of the source RenderFrame.
   const int render_frame_id_;
@@ -184,12 +195,18 @@ class AudioRendererHost::AudioEntry
   // The AudioOutputController that manages the audio stream.
   const scoped_refptr<media::AudioOutputController> controller_;
 
+  // Binds |this| to an AudioOutputStreamPtr that is passed to the
+  // AudioOutputStreamClient (AudioOutputIPC in the renderer process).
+  std::unique_ptr<mojo::Binding<media::mojom::AudioOutputStream>> binding_;
+
   bool playing_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioEntry);
 };
 
 AudioRendererHost::AudioEntry::AudioEntry(
     AudioRendererHost* host,
-    int stream_id,
+    int32_t stream_id,
     int render_frame_id,
     const media::AudioParameters& params,
     const std::string& output_device_id,
@@ -205,8 +222,49 @@ AudioRendererHost::AudioEntry::AudioEntry(
                                                        params,
                                                        output_device_id,
                                                        reader_.get())),
+      callback_(callback),
       playing_(false) {
   DCHECK(controller_.get());
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioRendererHost::OnCloseStream, host_, stream_id_));
+}
+
+void AudioRendererHost::AudioEntry::Play() {
+  controller_->Play();
+  host_->audio_log_->OnStarted(stream_id_);
+}
+
+void AudioRendererHost::AudioEntry::Pause() {
+  controller_->Pause();
+  host_->audio_log_->OnStopped(stream_id_);
+}
+
+void AudioRendererHost::AudioEntry::SetVolume(double volume) {
+  if (volume < 0 || volume > 1.0)
+    return;
+
+  controller_->SetVolume(volume);
+  host_->audio_log_->OnSetVolume(stream_id_, volume);
+}
+
+void AudioRendererHost::AudioEntry::OnConnectionError() {
+  binding_.reset();
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioRendererHost::CloseStream, host_, stream_id_));
+}
+
+void AudioRendererHost::AudioEntry::BindRequest(
+    media::mojom::AudioOutputStreamRequest request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  binding_.reset(new mojo::Binding<media::mojom::AudioOutputStream>(
+      this, std::move(request)));
+  binding_->set_connection_error_handler(
+      base::Bind(&AudioEntry::OnConnectionError, base::Unretained(this)));
 }
 
 AudioRendererHost::AudioEntry::~AudioEntry() {}
@@ -220,8 +278,7 @@ AudioRendererHost::AudioRendererHost(int render_process_id,
                                      MediaInternals* media_internals,
                                      MediaStreamManager* media_stream_manager,
                                      const std::string& salt)
-    : BrowserMessageFilter(AudioMsgStart),
-      render_process_id_(render_process_id),
+    : render_process_id_(render_process_id),
       audio_manager_(audio_manager),
       mirroring_manager_(mirroring_manager),
       audio_log_(media_internals->CreateAudioLog(
@@ -229,6 +286,7 @@ AudioRendererHost::AudioRendererHost(int render_process_id,
       media_stream_manager_(media_stream_manager),
       num_playing_streams_(0),
       salt_(salt),
+      next_stream_id_(0),
 #if DCHECK_IS_ON()
       validate_render_frame_id_function_(&ValidateRenderFrameId),
 #endif  // DCHECK_IS_ON()
@@ -263,99 +321,77 @@ void AudioRendererHost::GetOutputControllers(
       base::Bind(&AudioRendererHost::DoGetOutputControllers, this), callback);
 }
 
-void AudioRendererHost::OnChannelClosing() {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  // Since the IPC sender is gone, close all requested audio streams.
-  while (!audio_entries_.empty()) {
-    // Note: OnCloseStream() removes the entries from audio_entries_.
-    OnCloseStream(audio_entries_.begin()->first);
-  }
-
-  // Remove any authorizations for streams that were not yet created
-  authorizations_.clear();
-}
-
-void AudioRendererHost::OnDestruct() const {
-  BrowserThread::DeleteOnIOThread::Destruct(this);
-}
-
 void AudioRendererHost::AudioEntry::OnCreated() {
-  BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&AudioRendererHost::DoCompleteCreation, host_, stream_id_));
+  // TODO: make sure it's safe to capture |this| in the callback.
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&AudioRendererHost::DoCompleteCreation,
+                                     host_, this, stream_id_, callback_));
 }
 
 void AudioRendererHost::AudioEntry::OnPlaying() {
-  BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&AudioRendererHost::DoNotifyStreamStateChanged,
-                 host_,
-                 stream_id_,
-                 true));
 }
 
 void AudioRendererHost::AudioEntry::OnPaused() {
-  BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&AudioRendererHost::DoNotifyStreamStateChanged,
-                 host_,
-                 stream_id_,
-                 false));
 }
 
 void AudioRendererHost::AudioEntry::OnError() {
   BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&AudioRendererHost::ReportErrorAndClose, host_, stream_id_));
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&AudioRendererHost::OnCloseStream, host_, stream_id_));
 }
 
-void AudioRendererHost::DoCompleteCreation(int stream_id) {
+void AudioRendererHost::DoCompleteCreation(AudioEntry* entry,
+                                           int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
-  if (!PeerHandle()) {
-    DLOG(WARNING) << "Renderer process handle is invalid.";
-    ReportErrorAndClose(stream_id);
-    return;
-  }
-
-  AudioEntry* const entry = LookupById(stream_id);
-  if (!entry) {
-    ReportErrorAndClose(stream_id);
-    return;
-  }
-
-  // Once the audio stream is created then complete the creation process by
-  // mapping shared memory and sharing with the renderer process.
-  base::SharedMemoryHandle foreign_memory_handle;
-  if (!entry->shared_memory()->ShareToProcess(PeerHandle(),
-                                              &foreign_memory_handle)) {
-    // If we failed to map and share the shared memory then close the audio
-    // stream and send an error message.
-    ReportErrorAndClose(entry->stream_id());
-    return;
-  }
+  media::mojom::AudioOutputStreamPtr stream_ptr;
+  entry->BindRequest(mojo::GetProxy(&stream_ptr));
 
   AudioSyncReader* reader = static_cast<AudioSyncReader*>(entry->reader());
-
-  base::SyncSocket::TransitDescriptor socket_descriptor;
-
-  // If we failed to prepare the sync socket for the renderer then we fail
-  // the construction of audio stream.
-  if (!reader->PrepareForeignSocket(PeerHandle(), &socket_descriptor)) {
-    ReportErrorAndClose(entry->stream_id());
-    return;
-  }
-
-  Send(new AudioMsg_NotifyStreamCreated(
-      entry->stream_id(), foreign_memory_handle, socket_descriptor,
-      entry->shared_memory()->requested_size()));
-}
-
-void AudioRendererHost::DoNotifyStreamStateChanged(int stream_id,
+  base::PlatformFile socket_fd = reader->GetSyncSocket();
+  mojo::ScopedHandle socket_handle = mojo::WrapPlatformFile(socket_fd);
+  DCHECK(socket_handle.is_valid());
+
+  base::SharedMemoryHandle shared_memory_handle =
+      base::SharedMemory::DuplicateHandle(entry->shared_memory()->handle());
+  if (!base::SharedMemory::IsHandleValid(shared_memory_handle)) {
+    // TODO: When can this happen?
+    LOG(FATAL) << "Invalid shared mem handle";
+    return ReportErrorAndClose(stream_id);
+  }
+  mojo::ScopedSharedBufferHandle shared_buffer_handle =
+      mojo::WrapSharedMemoryHandle(shared_memory_handle,
+                                   entry->shared_memory()->requested_size(),
+                                   false);
+  DCHECK(shared_buffer_handle.is_valid());
+
+  /*mojo::ScopedSharedBufferHandle shared_buffer_handle =
+      mojo::WrapSharedMemoryHandle(shared_memory_handle,
+                                   entry->shared_memory()->requested_size(),
+                                   false);*/
+
+  /* TODO: read comment.
+  // The socket sent from the browser to the renderer is a ForeignSocket, which
+  // is a part of AudioSyncReader that is owned by AudioEntry. The socket handle
+  // is closed when the owning AudioEntry destructs. With mojo, the ownership of
+  // the handle is transferred to the target process. The handle is no longer
+  // valid in the sending process, and cannot be closed there. If the socket
+  // handle is closed when the AudioEntry is deleted, an error occurs. To WAR
+  // this error, duplicate the socket and send the duplicate to the renderer.
+  #if defined(OS_WIN)
+    mojo::ScopedHandle socket_handle =
+  mojo::WrapPlatformFile(socket_descriptor);
+  #else
+    mojo::ScopedHandle socket_handle =
+        mojo::WrapPlatformFile(socket_descriptor.fd);
+  #endif
+  */
+
+  callback.Run(std::move(stream_ptr), std::move(shared_buffer_handle),
+               std::move(socket_handle));
+}
+
+/*void AudioRendererHost::DoNotifyStreamStateChanged(int32_t stream_id,
                                                    bool is_playing) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
@@ -363,10 +399,9 @@ void AudioRendererHost::DoNotifyStreamStateChanged(int stream_id,
   if (!entry)
     return;
 
-  Send(new AudioMsg_NotifyStreamStateChanged(
-      stream_id,
-      is_playing ? media::AUDIO_OUTPUT_IPC_DELEGATE_STATE_PLAYING
-                 : media::AUDIO_OUTPUT_IPC_DELEGATE_STATE_PAUSED));
+  entry->SendStreamStateResponse(
+      is_playing ? media::mojom::AudioOutputStreamState::PLAYING
+                 : media::mojom::AudioOutputStreamState::PAUSED);
 
   if (is_playing) {
     AudioStreamMonitor::StartMonitoringStream(
@@ -380,7 +415,7 @@ void AudioRendererHost::DoNotifyStreamStateChanged(int stream_id,
         render_process_id_, entry->render_frame_id(), entry->stream_id());
   }
   UpdateNumPlayingStreams(entry, is_playing);
-}
+}*/
 
 RenderProcessHost::AudioOutputControllerList
 AudioRendererHost::DoGetOutputControllers() const {
@@ -396,91 +431,13 @@ AudioRendererHost::DoGetOutputControllers() const {
   return controllers;
 }
 
-///////////////////////////////////////////////////////////////////////////////
-// IPC Messages handler
-bool AudioRendererHost::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(AudioRendererHost, message)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_RequestDeviceAuthorization,
-                        OnRequestDeviceAuthorization)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_CreateStream, OnCreateStream)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_PlayStream, OnPlayStream)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_PauseStream, OnPauseStream)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_CloseStream, OnCloseStream)
-    IPC_MESSAGE_HANDLER(AudioHostMsg_SetVolume, OnSetVolume)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-
-  return handled;
-}
-
-void AudioRendererHost::OnRequestDeviceAuthorization(
-    int stream_id,
-    int render_frame_id,
-    int session_id,
+void AudioRendererHost::OnDeviceAuthorized(
+    int32_t stream_id,
+    RequestDeviceAuthorizationCallback callback,
     const std::string& device_id,
-    const url::Origin& security_origin) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  const base::TimeTicks auth_start_time = base::TimeTicks::Now();
-
-  DVLOG(1) << "AudioRendererHost@" << this << "::OnRequestDeviceAuthorization"
-           << "(stream_id=" << stream_id
-           << ", render_frame_id=" << render_frame_id
-           << ", session_id=" << session_id << ", device_id=" << device_id
-           << ", security_origin=" << security_origin << ")";
-
-  if (LookupById(stream_id) || IsAuthorizationStarted(stream_id))
-    return;
-
-  if (!IsValidDeviceId(device_id)) {
-    UMALogDeviceAuthorizationTime(auth_start_time);
-    Send(new AudioMsg_NotifyDeviceAuthorized(
-        stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_FOUND,
-        media::AudioParameters::UnavailableDeviceParams(), std::string()));
-    return;
-  }
-
-  // If |session_id should be used for output device selection and such output
-  // device is found, reuse the input device permissions.
-  if (media::AudioDeviceDescription::UseSessionIdToSelectDevice(session_id,
-                                                                device_id)) {
-    const StreamDeviceInfo* info =
-        media_stream_manager_->audio_input_device_manager()
-            ->GetOpenedDeviceInfoById(session_id);
-    if (info) {
-      media::AudioParameters output_params(
-          media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
-          static_cast<media::ChannelLayout>(
-              info->device.matched_output.channel_layout),
-          info->device.matched_output.sample_rate, 16,
-          info->device.matched_output.frames_per_buffer);
-      output_params.set_effects(info->device.matched_output.effects);
-      authorizations_.insert(MakeAuthorizationData(
-          stream_id, true, info->device.matched_output_device_id));
-      MaybeFixAudioParameters(&output_params);
-      UMALogDeviceAuthorizationTime(auth_start_time);
-      // Hash matched device id and pass it to the renderer
-      Send(new AudioMsg_NotifyDeviceAuthorized(
-          stream_id, media::OUTPUT_DEVICE_STATUS_OK, output_params,
-          GetHMACForMediaDeviceID(salt_, security_origin,
-                                  info->device.matched_output_device_id)));
-      return;
-    }
-  }
-
-  authorizations_.insert(
-      MakeAuthorizationData(stream_id, false, std::string()));
-  CheckOutputDeviceAccess(
-      render_frame_id, device_id, security_origin,
-      base::Bind(&AudioRendererHost::OnDeviceAuthorized, this, stream_id,
-                 device_id, security_origin, auth_start_time));
-}
-
-void AudioRendererHost::OnDeviceAuthorized(int stream_id,
-                                           const std::string& device_id,
-                                           const url::Origin& security_origin,
-                                           base::TimeTicks auth_start_time,
-                                           bool have_access) {
+    const url::Origin& security_origin,
+    base::TimeTicks auth_start_time,
+    bool have_access) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   const auto& auth_data = authorizations_.find(stream_id);
 
@@ -493,9 +450,9 @@ void AudioRendererHost::OnDeviceAuthorized(int stream_id,
   if (!have_access) {
     authorizations_.erase(auth_data);
     UMALogDeviceAuthorizationTime(auth_start_time);
-    Send(new AudioMsg_NotifyDeviceAuthorized(
-        stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_AUTHORIZED,
-        media::AudioParameters::UnavailableDeviceParams(), std::string()));
+    SendAuthorizationMessage(
+        callback, stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_AUTHORIZED,
+        media::AudioParameters::UnavailableDeviceParams(), std::string());
     return;
   }
 
@@ -510,19 +467,20 @@ void AudioRendererHost::OnDeviceAuthorized(int stream_id,
         audio_manager_->GetTaskRunner(), FROM_HERE,
         base::Bind(&GetDefaultDeviceInfoOnDeviceThread, audio_manager_),
         base::Bind(&AudioRendererHost::OnDeviceIDTranslated, this, stream_id,
-                   auth_start_time, true));
+                   auth_start_time, callback, true));
   } else {
     media_stream_manager_->audio_output_device_enumerator()->Enumerate(
         base::Bind(&AudioRendererHost::TranslateDeviceID, this, device_id,
                    security_origin,
                    base::Bind(&AudioRendererHost::OnDeviceIDTranslated, this,
-                              stream_id, auth_start_time)));
+                              stream_id, auth_start_time, callback)));
   }
 }
 
 void AudioRendererHost::OnDeviceIDTranslated(
-    int stream_id,
+    int32_t stream_id,
     base::TimeTicks auth_start_time,
+    RequestDeviceAuthorizationCallback callback,
     bool device_found,
     const AudioOutputDeviceInfo& device_info) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ -537,9 +495,9 @@ void AudioRendererHost::OnDeviceIDTranslated(
   if (!device_found) {
     authorizations_.erase(auth_data);
     UMALogDeviceAuthorizationTime(auth_start_time);
-    Send(new AudioMsg_NotifyDeviceAuthorized(
-        stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_FOUND,
-        media::AudioParameters::UnavailableDeviceParams(), std::string()));
+    SendAuthorizationMessage(
+        callback, stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_FOUND,
+        media::AudioParameters::UnavailableDeviceParams(), std::string());
     return;
   }
 
@@ -549,45 +507,11 @@ void AudioRendererHost::OnDeviceIDTranslated(
   media::AudioParameters output_params = device_info.output_params;
   MaybeFixAudioParameters(&output_params);
   UMALogDeviceAuthorizationTime(auth_start_time);
-  Send(new AudioMsg_NotifyDeviceAuthorized(
-      stream_id, media::OUTPUT_DEVICE_STATUS_OK, output_params, std::string()));
-}
-
-void AudioRendererHost::OnCreateStream(int stream_id,
-                                       int render_frame_id,
-                                       const media::AudioParameters& params) {
-  DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  DVLOG(1) << "AudioRendererHost@" << this << "::OnCreateStream"
-           << "(stream_id=" << stream_id << ")";
-
-  // Determine whether to use the device_unique_id from an authorization, or an
-  // empty string (i.e., when no previous authorization was requested, assume
-  // default device).
-  std::string device_unique_id;
-  const auto& auth_data = authorizations_.find(stream_id);
-  if (auth_data != authorizations_.end()) {
-    CHECK(auth_data->second.first);
-    device_unique_id.swap(auth_data->second.second);
-    authorizations_.erase(auth_data);
-  }
-
-#if DCHECK_IS_ON()
-  // When DCHECKs are turned on, hop over to the UI thread to validate the
-  // |render_frame_id|, then continue stream creation on the IO thread. See
-  // comment at top of DoCreateStream() for further details.
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(validate_render_frame_id_function_, render_process_id_,
-                 render_frame_id,
-                 base::Bind(&AudioRendererHost::DoCreateStream, this, stream_id,
-                            render_frame_id, params, device_unique_id)));
-#else
-  DoCreateStream(stream_id, render_frame_id, params, device_unique_id,
-                 render_frame_id > 0);
-#endif  // DCHECK_IS_ON()
+  SendAuthorizationMessage(callback, stream_id, media::OUTPUT_DEVICE_STATUS_OK,
+                           output_params, std::string());
 }
 
-void AudioRendererHost::DoCreateStream(int stream_id,
+void AudioRendererHost::DoCreateStream(int32_t stream_id,
                                        int render_frame_id,
                                        const media::AudioParameters& params,
                                        const std::string& device_unique_id,
@@ -619,6 +543,7 @@ void AudioRendererHost::DoCreateStream(int stream_id,
                                 AudioBus::CalculateMemorySize(params);
   std::unique_ptr<base::SharedMemory> shared_memory(new base::SharedMemory());
   if (!shared_memory->CreateAndMapAnonymous(shared_memory_size)) {
+    // client->OnStreamStateChange(media::mojom::AudioOutputStreamState::ERROR);
     SendErrorMessage(stream_id);
     return;
   }
@@ -635,9 +560,9 @@ void AudioRendererHost::DoCreateStream(int stream_id,
   if (media_observer)
     media_observer->OnCreatingAudioStream(render_process_id_, render_frame_id);
 
-  std::unique_ptr<AudioEntry> entry(
-      new AudioEntry(this, stream_id, render_frame_id, params, device_unique_id,
-                     std::move(shared_memory), std::move(reader)));
+  std::unique_ptr<AudioEntry> entry(new AudioEntry(
+      this, callback, stream_id, render_frame_id, params, device_unique_id,
+      std::move(shared_memory), std::move(reader)));
   if (mirroring_manager_) {
     mirroring_manager_->AddDiverter(
         render_process_id_, entry->render_frame_id(), entry->controller());
@@ -653,7 +578,7 @@ void AudioRendererHost::DoCreateStream(int stream_id,
     max_simultaneous_streams_ = audio_entries_.size();
 }
 
-void AudioRendererHost::OnPlayStream(int stream_id) {
+void AudioRendererHost::OnPlayStream(int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AudioEntry* entry = LookupById(stream_id);
@@ -666,7 +591,7 @@ void AudioRendererHost::OnPlayStream(int stream_id) {
   audio_log_->OnStarted(stream_id);
 }
 
-void AudioRendererHost::OnPauseStream(int stream_id) {
+void AudioRendererHost::OnPauseStream(int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AudioEntry* entry = LookupById(stream_id);
@@ -679,7 +604,7 @@ void AudioRendererHost::OnPauseStream(int stream_id) {
   audio_log_->OnStopped(stream_id);
 }
 
-void AudioRendererHost::OnSetVolume(int stream_id, double volume) {
+void AudioRendererHost::OnSetVolume(int32_t stream_id, double volume) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AudioEntry* entry = LookupById(stream_id);
@@ -695,12 +620,11 @@ void AudioRendererHost::OnSetVolume(int stream_id, double volume) {
   audio_log_->OnSetVolume(stream_id, volume);
 }
 
-void AudioRendererHost::SendErrorMessage(int stream_id) {
-  Send(new AudioMsg_NotifyStreamStateChanged(
-      stream_id, media::AUDIO_OUTPUT_IPC_DELEGATE_STATE_ERROR));
+void AudioRendererHost::SendErrorMessage(int32_t stream_id) {
+  // TODO
 }
 
-void AudioRendererHost::OnCloseStream(int stream_id) {
+void AudioRendererHost::OnCloseStream(int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   authorizations_.erase(stream_id);
 
@@ -735,7 +659,7 @@ void AudioRendererHost::DeleteEntry(std::unique_ptr<AudioEntry> entry) {
   UpdateNumPlayingStreams(entry.get(), false);
 }
 
-void AudioRendererHost::ReportErrorAndClose(int stream_id) {
+void AudioRendererHost::ReportErrorAndClose(int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // Make sure this isn't a stray callback executing after the stream has been
@@ -750,7 +674,8 @@ void AudioRendererHost::ReportErrorAndClose(int stream_id) {
   OnCloseStream(stream_id);
 }
 
-AudioRendererHost::AudioEntry* AudioRendererHost::LookupById(int stream_id) {
+AudioRendererHost::AudioEntry* AudioRendererHost::LookupById(
+    int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AudioEntryMap::const_iterator i = audio_entries_.find(stream_id);
@@ -791,6 +716,128 @@ bool AudioRendererHost::HasActiveAudio() {
   return !base::AtomicRefCountIsZero(&num_playing_streams_);
 }
 
+void AudioRendererHost::BindRequest(media::mojom::AudioOutputRequest request) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  binding_.reset(
+      new mojo::Binding<media::mojom::AudioOutput>(this, std::move(request)));
+}
+
+// media::mojom::AudioOutput implementation
+void AudioRendererHost::RequestDeviceAuthorization(
+    int64_t render_frame_id,
+    int64_t session_id,
+    const mojo::String& device_id,
+    const url::Origin& origin,
+    const RequestDeviceAuthorizationCallback& callback) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  const base::TimeTicks auth_start_time = base::TimeTicks::Now();
+  int32_t stream_id = next_stream_id++;
+
+  DVLOG(1) << "AudioRendererHost@" << this << "::RequestDeviceAuthorization"
+           << "(stream_id=" << stream_id
+           << ", render_frame_id=" << render_frame_id
+           << ", session_id=" << session_id << ", device_id=" << device_id
+           << ", origin=" << origin << ")";
+
+  if (LookupById(stream_id) || IsAuthorizationStarted(stream_id))
+    return;
+
+  if (!IsValidDeviceId(device_id)) {
+    UMALogDeviceAuthorizationTime(auth_start_time);
+    SendAuthorizationMessage(
+        callback, stream_id, media::OUTPUT_DEVICE_STATUS_ERROR_NOT_FOUND,
+        media::AudioParameters::UnavailableDeviceParams(), std::string());
+    return;
+  }
+
+  // If |session_id should be used for output device selection and such output
+  // device is found, reuse the input device permissions.
+  if (media::AudioDeviceDescription::UseSessionIdToSelectDevice(session_id,
+                                                                device_id)) {
+    const StreamDeviceInfo* info =
+        media_stream_manager_->audio_input_device_manager()
+            ->GetOpenedDeviceInfoById(session_id);
+    if (info) {
+      media::AudioParameters output_params(
+          media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
+          static_cast<media::ChannelLayout>(
+              info->device.matched_output.channel_layout),
+          info->device.matched_output.sample_rate, 16,
+          info->device.matched_output.frames_per_buffer);
+      output_params.set_effects(info->device.matched_output.effects);
+      authorizations_.insert(MakeAuthorizationData(
+          stream_id, true, info->device.matched_output_device_id));
+      MaybeFixAudioParameters(&output_params);
+      UMALogDeviceAuthorizationTime(auth_start_time);
+      // Hash matched device id and pass it to the renderer
+      SendAuthorizationMessage(
+          callback, stream_id, media::OUTPUT_DEVICE_STATUS_OK, output_params,
+          GetHMACForMediaDeviceID(salt_, origin,
+                                  info->device.matched_output_device_id));
+      return;
+    }
+  }
+
+  authorizations_.insert(
+      MakeAuthorizationData(stream_id, false, std::string()));
+  CheckOutputDeviceAccess(
+      render_frame_id, device_id, origin,
+      base::Bind(&AudioRendererHost::OnDeviceAuthorized, this, stream_id,
+                 callback, device_id, origin, auth_start_time));
+}
+
+void AudioRendererHost::CreateStream(int32_t stream_id,
+                                     int render_frame_id,
+                                     const media::AudioParameters& params) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  DVLOG(1) << "AudioRendererHost@" << this << "::CreateStream"
+           << "(stream_id=" << stream_id << ")";
+
+  // Determine whether to use the device_unique_id from an authorization, or an
+  // empty string (i.e., when no previous authorization was requested, assume
+  // default device).
+  std::string device_unique_id;
+  const auto& auth_data = authorizations_.find(stream_id);
+  if (auth_data != authorizations_.end()) {
+    CHECK(auth_data->second.first);
+    device_unique_id.swap(auth_data->second.second);
+    authorizations_.erase(auth_data);
+  }
+
+#if DCHECK_IS_ON()
+  // When DCHECKs are turned on, hop over to the UI thread to validate the
+  // |render_frame_id|, then continue stream creation on the IO thread. See
+  // comment at top of DoCreateStream() for further details.
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(validate_render_frame_id_function_, render_process_id_,
+                 render_frame_id,
+                 base::Bind(&AudioRendererHost::DoCreateStream, this, stream_id,
+                            render_frame_id, params, device_unique_id)));
+#else
+  DoCreateStream(stream_id, render_frame_id, params, device_unique_id,
+                 render_frame_id > 0);
+#endif  // DCHECK_IS_ON()
+}
+
+void AudioRendererHost::CloseStream(int32_t stream_id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  OnCloseStream(stream_id);
+}
+
+void AudioRendererHost::SendAuthorizationMessage(
+    RequestDeviceAuthorizationCallback callback,
+    int32_t stream_id,
+    media::OutputDeviceStatus status,
+    const media::AudioParameters& params,
+    const std::string& matched_device_id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+
+  callback.Run(status, params, matched_device_id);
+}
+
 void AudioRendererHost::CheckOutputDeviceAccess(
     int render_frame_id,
     const std::string& device_id,
@@ -803,8 +850,8 @@ void AudioRendererHost::CheckOutputDeviceAccess(
   if (!media::AudioDeviceDescription::IsDefaultDevice(device_id) &&
       !MediaStreamManager::IsOriginAllowed(render_process_id_,
                                            security_origin)) {
-    content::bad_message::ReceivedBadMessage(this,
-                                             bad_message::ARH_UNAUTHORIZED_URL);
+    // content::bad_message::ReceivedBadMessage(this,
+    //                                       bad_message::ARH_UNAUTHORIZED_URL);
     return;
   }
 
@@ -861,7 +908,7 @@ void AudioRendererHost::TranslateDeviceID(
   callback.Run(false, device_info);
 }
 
-bool AudioRendererHost::IsAuthorizationStarted(int stream_id) {
+bool AudioRendererHost::IsAuthorizationStarted(int32_t stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   const auto& i = authorizations_.find(stream_id);
   return i != authorizations_.end();