Rewrite PPB_AudioInput_Dev to use the new-style host/resource.

content/renderer/pepper/pepper_audio_input_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.
+
+#ifndef CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
+#define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/shared_memory.h"
+#include "base/sync_socket.h"
+#include "ipc/ipc_platform_file.h"
+#include "ppapi/c/ppb_audio_config.h"
+#include "ppapi/host/host_message_context.h"
+#include "ppapi/host/resource_host.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
+
+namespace ppapi {
+struct DeviceRefData;
+}
+
+namespace content {
+
+class RendererPpapiHost;
+
+class PepperAudioInputHost
+    : public ppapi::host::ResourceHost,
+      public webkit::ppapi::PluginDelegate::PlatformAudioInputClient,
+      public base::SupportsWeakPtr<PepperAudioInputHost> {
+ public:
+  PepperAudioInputHost(RendererPpapiHost* host,
+                       PP_Instance instance,
+                       PP_Resource resource);
+  virtual ~PepperAudioInputHost();
+
+  virtual int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) OVERRIDE;
+
+  // PluginDelegate::PlatformAudioInputClient implementation.
+  virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
+                             size_t shared_memory_size,
+                             base::SyncSocket::Handle socket) OVERRIDE;
+  virtual void StreamCreationFailed() OVERRIDE;
+
+ private:
+  int32_t OnMsgEnumerateDevices(ppapi::host::HostMessageContext* context);
+  int32_t OnMsgOpen(ppapi::host::HostMessageContext* context,
+                    const std::string& device_id,
+                    PP_AudioSampleRate sample_rate,
+                    uint32_t sample_frame_count);
+  int32_t OnMsgStartOrStop(ppapi::host::HostMessageContext* context,
+                           bool capture);
+  int32_t OnMsgClose(ppapi::host::HostMessageContext* context);
+
+  void EnumerateDevicesCallbackFunc(
+      int request_id,
+      bool succeeded,
+      const std::vector<ppapi::DeviceRefData>& devices);
+
+  void OnOpenComplete(int32_t result,
+                      base::SharedMemoryHandle shared_memory_handle,
+                      size_t shared_memory_size,
+                      base::SyncSocket::Handle socket_handle);
+
+  int32_t GetRemoteHandles(
+      const base::SyncSocket& socket,
+      const base::SharedMemory& shared_memory,
+      IPC::PlatformFileForTransit* remote_socket_handle,
+      base::SharedMemoryHandle* remote_shared_memory_handle);
+
+  void Close();
+
+  // TODO(yzshen): Move the relevant functionality out of PluginDelegate and get
+  // rid of this method.
+  webkit::ppapi::PluginDelegate* GetDelegate() const;
+
+  // Non-owning pointer.
+  RendererPpapiHost* renderer_ppapi_host_;
+
+  scoped_ptr<ppapi::host::ReplyMessageContext> enumerate_devices_context_;
+  scoped_ptr<ppapi::host::ReplyMessageContext> open_context_;
+
+  // PluginDelegate audio input object that we delegate audio IPC through.
+  // We don't own this pointer but are responsible for calling Shutdown on it.
+  webkit::ppapi::PluginDelegate::PlatformAudioInput* audio_input_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperAudioInputHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_