webkit/plugins/ppapi/audio_helper.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 WEBKIT_PLUGINS_PPAPI_AUDIO_HELPER_H_
   6 #define WEBKIT_PLUGINS_PPAPI_AUDIO_HELPER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/shared_memory.h"
  11 #include "base/sync_socket.h"
  12 #include "ppapi/c/pp_completion_callback.h"
  13 #include "ppapi/shared_impl/resource.h"
  14 #include "ppapi/shared_impl/scoped_pp_resource.h"
  15 #include "ppapi/shared_impl/tracked_callback.h"
  16 #include "webkit/plugins/ppapi/plugin_delegate.h"
  17 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
  18
  19 namespace webkit {
  20 namespace ppapi {
  21
  22 class AudioHelper : public PluginDelegate::PlatformAudioOutputClient {
  23  public:
  24   AudioHelper();
  25   virtual ~AudioHelper();
  26
  27   // |PluginDelegate::PlatformAudioOutputClient| implementation.
  28   virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
  29                              size_t shared_memory_size_,
  30                              base::SyncSocket::Handle socket) OVERRIDE;
  31
  32   void SetCreateCallback(
  33       scoped_refptr< ::ppapi::TrackedCallback> create_callback);
  34
  35  protected:
  36   // TODO(viettrungluu): This is all very poorly thought out. Refactor.
  37
  38   // To be called by implementations of |PPB_Audio_API|/|PPB_AudioInput_API|.
  39   int32_t GetSyncSocketImpl(int* sync_socket);
  40   int32_t GetSharedMemoryImpl(int* shm_handle, uint32_t* shm_size);
  41
  42   // To be implemented by subclasses to call their |SetStreamInfo()|.
  43   virtual void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
  44                                size_t shared_memory_size,
  45                                base::SyncSocket::Handle socket_handle) = 0;
  46
  47  private:
  48   scoped_refptr< ::ppapi::TrackedCallback> create_callback_;
  49
  50   // When a create callback is being issued, these will save the info for
  51   // querying from the callback. The proxy uses this to get the handles to the
  52   // other process instead of mapping them in the renderer. These will be
  53   // invalid all other times.
  54   scoped_ptr<base::SharedMemory> shared_memory_for_create_callback_;
  55   size_t shared_memory_size_for_create_callback_;
  56   scoped_ptr<base::SyncSocket> socket_for_create_callback_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(AudioHelper);
  59 };
  60
  61 }  // namespace ppapi
  62 }  // namespace webkit
  63
  64 #endif  // WEBKIT_PLUGINS_PPAPI_AUDIO_HELPER_H_