Merge AssociateStreamWithProducer message into CreateStream message for both audio output and input.

content/renderer/pepper/pepper_platform_audio_input_impl.cc

 // 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.
 
 #include "content/renderer/pepper/pepper_platform_audio_input_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "build/build_config.h"
 #include "content/common/child_process.h"
-#include "content/common/media/audio_messages.h"
 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/pepper/pepper_plugin_delegate_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace content {
 
 // static
 PepperPlatformAudioInputImpl* PepperPlatformAudioInputImpl::Create(
     const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
@@ skipping 25 matching lines @@
   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 
   ChildProcess::current()->io_message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&PepperPlatformAudioInputImpl::StopCaptureOnIOThread, this));
 }
 
 void PepperPlatformAudioInputImpl::ShutDown() {
   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 
+  // Make sure we don't call shutdown more than once.
+  if (!client_)
+    return;
+
   // Called on the main thread to stop all audio callbacks. We must only change
   // the client on the main thread, and the delegates from the I/O thread.
   client_ = NULL;
   ChildProcess::current()->io_message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&PepperPlatformAudioInputImpl::ShutDownOnIOThread, this));
 }
 
 void PepperPlatformAudioInputImpl::OnStreamCreated(
     base::SharedMemoryHandle handle,
     base::SyncSocket::Handle socket_handle,
     int length) {
 #if defined(OS_WIN)
   DCHECK(handle);
   DCHECK(socket_handle);
 #else
   DCHECK_NE(-1, handle.fd);
   DCHECK_NE(-1, socket_handle);
 #endif
   DCHECK(length);
 
   if (base::MessageLoopProxy::current() != main_message_loop_proxy_) {
-    // No need to check |shutdown_called_| here. If shutdown has occurred,
-    // |client_| will be NULL and the handles will be cleaned up on the main
-    // thread.
+    // If shutdown has occurred, |client_| will be NULL and the handles will be
+    // cleaned up on the main thread.
     main_message_loop_proxy_->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioInputImpl::OnStreamCreated, this,
                    handle, socket_handle, length));
   } else {
     // Must dereference the client only on the main thread. Shutdown may have
     // occurred while the request was in-flight, so we need to NULL check.
     if (client_) {
       client_->StreamCreated(handle, length, socket_handle);
     } else {
       // Clean up the handles.
       base::SyncSocket temp_socket(socket_handle);
       base::SharedMemory temp_shared_memory(handle, false);
     }
   }
 }
 
 void PepperPlatformAudioInputImpl::OnVolume(double volume) {}
 
 void PepperPlatformAudioInputImpl::OnStateChanged(
     media::AudioInputIPCDelegate::State state) {
 }
 
 void PepperPlatformAudioInputImpl::OnDeviceReady(const std::string& device_id) {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->
       BelongsToCurrentThread());
 
-  if (shutdown_called_)
+  if (!ipc_)
     return;
 
   if (device_id.empty()) {
     main_message_loop_proxy_->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioInputImpl::NotifyStreamCreationFailed,
                    this));
   } else {
     // We will be notified by OnStreamCreated().
-    ipc_->CreateStream(stream_id_, params_, device_id, false);
+    ipc_->CreateStream(this, params_, device_id, false);
   }
 }
 
 void PepperPlatformAudioInputImpl::OnIPCClosed() {
-  ipc_ = NULL;
+  ipc_.reset();
 }
 
 PepperPlatformAudioInputImpl::~PepperPlatformAudioInputImpl() {
   // Make sure we have been shut down. Warning: this may happen on the I/O
   // thread!
   // Although these members should be accessed on a specific thread (either the
   // main thread or the I/O thread), it should be fine to examine their value
   // here.
-  DCHECK_EQ(0, stream_id_);
+  DCHECK(!ipc_);
   DCHECK(!client_);
   DCHECK(label_.empty());
-  DCHECK(shutdown_called_);
 }
 
 PepperPlatformAudioInputImpl::PepperPlatformAudioInputImpl()
     : client_(NULL),
-      stream_id_(0),
-      render_view_id_(MSG_ROUTING_NONE),
-      main_message_loop_proxy_(base::MessageLoopProxy::current()),
-      shutdown_called_(false) {
-  ipc_ = RenderThreadImpl::current()->audio_input_message_filter();
+      main_message_loop_proxy_(base::MessageLoopProxy::current()) {
 }
 
 bool PepperPlatformAudioInputImpl::Initialize(
     const base::WeakPtr<PepperPluginDelegateImpl>& plugin_delegate,
     const std::string& device_id,
     int sample_rate,
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioInputClient* client) {
   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 
   if (!plugin_delegate || !client)
     return false;
 
+  ipc_ = RenderThreadImpl::current()->audio_input_message_filter()->
+      CreateAudioInputIPC(plugin_delegate->GetRoutingID());
+  CHECK(ipc_);
+
   plugin_delegate_ = plugin_delegate;
-  render_view_id_ = plugin_delegate_->GetRoutingID();
   client_ = client;
 
   params_.Reset(media::AudioParameters::AUDIO_PCM_LINEAR,
                 media::CHANNEL_LAYOUT_MONO, 0,
                 sample_rate, 16, frames_per_buffer);
 
   if (device_id.empty()) {
     // Use the default device.
     ChildProcess::current()->io_message_loop()->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioInputImpl::InitializeOnIOThread,
                    this, 0));
   } else {
     // We need to open the device and obtain the label and session ID before
     // initializing.
     plugin_delegate_->OpenDevice(
         PP_DEVICETYPE_DEV_AUDIOCAPTURE, device_id,
         base::Bind(&PepperPlatformAudioInputImpl::OnDeviceOpened, this));
   }
   return true;
 }
 
 void PepperPlatformAudioInputImpl::InitializeOnIOThread(int session_id) {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->
       BelongsToCurrentThread());
 
-  if (shutdown_called_)
+  if (!ipc_)
     return;
 
-  // Make sure we don't call init more than once.
-  DCHECK_EQ(0, stream_id_);
-  stream_id_ = ipc_->AddDelegate(this);
-  DCHECK_NE(0, stream_id_);
-
   if (!session_id) {
     // We will be notified by OnStreamCreated().
-    ipc_->CreateStream(stream_id_, params_,
-        media::AudioManagerBase::kDefaultDeviceId, false);
+    ipc_->CreateStream(
+        this, params_, media::AudioManagerBase::kDefaultDeviceId, false);
   } else {
     // We will be notified by OnDeviceReady().
-    ipc_->StartDevice(stream_id_, session_id);
+    ipc_->StartDevice(this, session_id);
   }
 }
 
 void PepperPlatformAudioInputImpl::StartCaptureOnIOThread() {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->
       BelongsToCurrentThread());
 
-  if (stream_id_) {
-    ipc_->AssociateStreamWithConsumer(stream_id_, render_view_id_);
-    ipc_->RecordStream(stream_id_);
-  }
+  if (ipc_)
+    ipc_->RecordStream();
 }
 
 void PepperPlatformAudioInputImpl::StopCaptureOnIOThread() {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->
       BelongsToCurrentThread());
 
   // TODO(yzshen): We cannot re-start capturing if the stream is closed.
-  if (stream_id_)
-    ipc_->CloseStream(stream_id_);
+  if (ipc_) {
+    ipc_->CloseStream();
+    ipc_.reset();
+  }
 }
 
 void PepperPlatformAudioInputImpl::ShutDownOnIOThread() {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->
       BelongsToCurrentThread());
 
-  // Make sure we don't call shutdown more than once.
-  if (shutdown_called_)
-    return;
-  shutdown_called_ = true;
-
-  if (stream_id_) {
-    ipc_->CloseStream(stream_id_);
-    ipc_->RemoveDelegate(stream_id_);
-    stream_id_ = 0;
-  }
+  StopCaptureOnIOThread();
 
   main_message_loop_proxy_->PostTask(
       FROM_HERE,
       base::Bind(&PepperPlatformAudioInputImpl::CloseDevice, this));
 
   Release();  // Release for the delegate, balances out the reference taken in
               // PepperPluginDelegateImpl::CreateAudioInput.
 }
 
 void PepperPlatformAudioInputImpl::OnDeviceOpened(int request_id,
@@ skipping 31 matching lines @@
 }
 
 void PepperPlatformAudioInputImpl::NotifyStreamCreationFailed() {
   DCHECK(main_message_loop_proxy_->BelongsToCurrentThread());
 
   if (client_)
     client_->StreamCreationFailed();
 }
 
 }  // namespace content