content/renderer/pepper/ppb_audio_impl.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_PPB_AUDIO_IMPL_H_
   6 #define CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/shared_memory.h"
  11 #include "base/sync_socket.h"
  12 #include "content/renderer/pepper/audio_helper.h"
  13 #include "ppapi/c/pp_completion_callback.h"
  14 #include "ppapi/c/ppb_audio.h"
  15 #include "ppapi/c/ppb_audio_config.h"
  16 #include "ppapi/shared_impl/ppb_audio_config_shared.h"
  17 #include "ppapi/shared_impl/ppb_audio_shared.h"
  18 #include "ppapi/shared_impl/resource.h"
  19 #include "ppapi/shared_impl/scoped_pp_resource.h"
  20
  21 namespace content {
  22 class PepperPlatformAudioOutput;
  23
  24 // Some of the backend functionality of this class is implemented by the
  25 // PPB_Audio_Shared so it can be shared with the proxy.
  26 class PPB_Audio_Impl : public ppapi::Resource,
  27                        public ppapi::PPB_Audio_Shared,
  28                        public AudioHelper {
  29  public:
  30   // Trusted initialization. You must call Init after this.
  31   //
  32   // Untrusted initialization should just call the static Create() function
  33   // to properly create & initialize this class.
  34   explicit PPB_Audio_Impl(PP_Instance instance);
  35
  36   // Creation function for untrusted plugins. This handles all initialization
  37   // and will return 0 on failure.
  38   static PP_Resource Create(PP_Instance instance,
  39                             PP_Resource config_id,
  40                             const ppapi::AudioCallbackCombined& audio_callback,
  41                             void* user_data);
  42
  43   // Initialization function for trusted init.
  44   bool Init(PP_Resource config_id,
  45             const ppapi::AudioCallbackCombined& user_callback,
  46             void* user_data);
  47
  48   // Resource overrides.
  49   virtual ppapi::thunk::PPB_Audio_API* AsPPB_Audio_API() OVERRIDE;
  50
  51   // PPB_Audio_API implementation.
  52   virtual PP_Resource GetCurrentConfig() OVERRIDE;
  53   virtual PP_Bool StartPlayback() OVERRIDE;
  54   virtual PP_Bool StopPlayback() OVERRIDE;
  55   virtual int32_t Open(
  56       PP_Resource config_id,
  57       scoped_refptr<ppapi::TrackedCallback> create_callback) OVERRIDE;
  58   virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
  59   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;
  60
  61  private:
  62   virtual ~PPB_Audio_Impl();
  63
  64   // AudioHelper implementation.
  65   virtual void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
  66                                size_t shared_memory_size_,
  67                                base::SyncSocket::Handle socket) OVERRIDE;
  68
  69   // AudioConfig used for creating this Audio object. We own a ref.
  70   ppapi::ScopedPPResource config_;
  71
  72   // PluginDelegate audio object that we delegate audio IPC through. We don't
  73   // own this pointer but are responsible for calling Shutdown on it.
  74   PepperPlatformAudioOutput* audio_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Impl);
  77 };
  78
  79 }  // namespace content
  80
  81 #endif  // CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_