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