content/renderer/pepper/pepper_audio_input_host.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/shared_memory.h"
  14 #include "base/sync_socket.h"
  15 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
  16 #include "ipc/ipc_platform_file.h"
  17 #include "ppapi/c/ppb_audio_config.h"
  18 #include "ppapi/host/host_message_context.h"
  19 #include "ppapi/host/resource_host.h"
  20 #include "webkit/plugins/ppapi/plugin_delegate.h"
  21
  22 namespace content {
  23
  24 class RendererPpapiHost;
  25
  26 class PepperAudioInputHost
  27     : public ppapi::host::ResourceHost,
  28       public webkit::ppapi::PluginDelegate::PlatformAudioInputClient,
  29       public PepperDeviceEnumerationHostHelper::Delegate {
  30  public:
  31   PepperAudioInputHost(RendererPpapiHost* host,
  32                        PP_Instance instance,
  33                        PP_Resource resource);
  34   virtual ~PepperAudioInputHost();
  35
  36   virtual int32_t OnResourceMessageReceived(
  37       const IPC::Message& msg,
  38       ppapi::host::HostMessageContext* context) OVERRIDE;
  39
  40   // PluginDelegate::PlatformAudioInputClient implementation.
  41   virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
  42                              size_t shared_memory_size,
  43                              base::SyncSocket::Handle socket) OVERRIDE;
  44   virtual void StreamCreationFailed() OVERRIDE;
  45
  46   // PepperDeviceEnumerationHostHelper::Delegate implementation.
  47   virtual webkit::ppapi::PluginDelegate* GetPluginDelegate() OVERRIDE;
  48
  49  private:
  50   int32_t OnOpen(ppapi::host::HostMessageContext* context,
  51                  const std::string& device_id,
  52                  PP_AudioSampleRate sample_rate,
  53                  uint32_t sample_frame_count);
  54   int32_t OnStartOrStop(ppapi::host::HostMessageContext* context,
  55                         bool capture);
  56   int32_t OnClose(ppapi::host::HostMessageContext* context);
  57
  58   void OnOpenComplete(int32_t result,
  59                       base::SharedMemoryHandle shared_memory_handle,
  60                       size_t shared_memory_size,
  61                       base::SyncSocket::Handle socket_handle);
  62
  63   int32_t GetRemoteHandles(
  64       const base::SyncSocket& socket,
  65       const base::SharedMemory& shared_memory,
  66       IPC::PlatformFileForTransit* remote_socket_handle,
  67       base::SharedMemoryHandle* remote_shared_memory_handle);
  68
  69   void Close();
  70
  71   // Non-owning pointer.
  72   RendererPpapiHost* renderer_ppapi_host_;
  73
  74   scoped_ptr<ppapi::host::ReplyMessageContext> open_context_;
  75
  76   // PluginDelegate audio input object that we delegate audio IPC through.
  77   // We don't own this pointer but are responsible for calling Shutdown on it.
  78   webkit::ppapi::PluginDelegate::PlatformAudioInput* audio_input_;
  79
  80   PepperDeviceEnumerationHostHelper enumeration_helper_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(PepperAudioInputHost);
  83 };
  84
  85 }  // namespace content
  86
  87 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_