ppapi/proxy/ppb_audio_proxy.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 PPAPI_PROXY_PPB_AUDIO_PROXY_H_
   6 #define PPAPI_PROXY_PPB_AUDIO_PROXY_H_
   7
   8 #include <utility>
   9
  10 #include "base/basictypes.h"
  11 #include "base/shared_memory.h"
  12 #include "base/sync_socket.h"
  13 #include "ipc/ipc_platform_file.h"
  14 #include "ppapi/c/pp_instance.h"
  15 #include "ppapi/c/pp_resource.h"
  16 #include "ppapi/c/ppb_audio.h"
  17 #include "ppapi/c/ppb_audio_config.h"
  18 #include "ppapi/proxy/interface_proxy.h"
  19 #include "ppapi/proxy/proxy_completion_callback_factory.h"
  20 #include "ppapi/proxy/serialized_structs.h"
  21 #include "ppapi/utility/completion_callback_factory.h"
  22
  23 namespace ppapi {
  24
  25 class HostResource;
  26
  27 namespace proxy {
  28
  29 class PPB_Audio_Proxy : public InterfaceProxy {
  30  public:
  31   PPB_Audio_Proxy(Dispatcher* dispatcher);
  32   virtual ~PPB_Audio_Proxy();
  33
  34   // Creates an Audio object in the plugin process.
  35   static PP_Resource CreateProxyResource(PP_Instance instance_id,
  36                                          PP_Resource config_id,
  37                                          PPB_Audio_Callback audio_callback,
  38                                          void* user_data);
  39
  40
  41   // InterfaceProxy implementation.
  42   virtual bool OnMessageReceived(const IPC::Message& msg);
  43
  44   static const ApiID kApiID = API_ID_PPB_AUDIO;
  45
  46  private:
  47   // Plugin->renderer message handlers.
  48   void OnMsgCreate(PP_Instance instance_id,
  49                    int32_t sample_rate,
  50                    uint32_t sample_frame_count,
  51                    ppapi::HostResource* result);
  52   void OnMsgStartOrStop(const ppapi::HostResource& audio_id, bool play);
  53
  54   // Renderer->plugin message handlers.
  55   void OnMsgNotifyAudioStreamCreated(
  56       const ppapi::HostResource& audio_id,
  57       int32_t result_code,
  58       ppapi::proxy::SerializedHandle socket_handle,
  59       ppapi::proxy::SerializedHandle handle);
  60
  61   void AudioChannelConnected(int32_t result,
  62                              const ppapi::HostResource& resource);
  63
  64   // In the renderer, this is called in response to a stream created message.
  65   // It will retrieve the shared memory and socket handles and place them into
  66   // the given out params. The return value is a PPAPI error code.
  67   //
  68   // The input arguments should be initialized to 0 or -1, depending on the
  69   // platform's default invalid handle values. On error, some of these
  70   // arguments may be written to, and others may be untouched, depending on
  71   // where the error occurred.
  72   int32_t GetAudioConnectedHandles(
  73       const ppapi::HostResource& resource,
  74       IPC::PlatformFileForTransit* foreign_socket_handle,
  75       base::SharedMemoryHandle* foreign_shared_memory_handle,
  76       uint32_t* shared_memory_length);
  77
  78   ProxyCompletionCallbackFactory<PPB_Audio_Proxy> callback_factory_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Proxy);
  81 };
  82
  83 }  // namespace proxy
  84 }  // namespace ppapi
  85
  86 #endif  // PPAPI_PROXY_PPB_AUDIO_PROXY_H_