webkit/plugins/ppapi/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 WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_IMPL_H_
   6 #define WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_IMPL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/shared_memory.h"
  11 #include "base/sync_socket.h"
  12 #include "ppapi/c/pp_completion_callback.h"
  13 #include "ppapi/c/ppb_audio.h"
  14 #include "ppapi/c/ppb_audio_config.h"
  15 #include "ppapi/c/trusted/ppb_audio_trusted.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 #include "webkit/plugins/ppapi/audio_helper.h"
  21 #include "webkit/plugins/ppapi/plugin_delegate.h"
  22 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
  23
  24 namespace webkit {
  25 namespace ppapi {
  26
  27 // Some of the backend functionality of this class is implemented by the
  28 // PPB_Audio_Shared so it can be shared with the proxy.
  29 class PPB_Audio_Impl : public ::ppapi::Resource,
  30                        public ::ppapi::PPB_Audio_Shared,
  31                        public AudioHelper {
  32  public:
  33   // Trusted initialization. You must call Init after this.
  34   //
  35   // Untrusted initialization should just call the static Create() function
  36   // to properly create & initialize this class.
  37   explicit PPB_Audio_Impl(PP_Instance instance);
  38
  39   virtual ~PPB_Audio_Impl();
  40
  41   // Creation function for untrusted plugins. This handles all initialization
  42   // and will return 0 on failure.
  43   static PP_Resource Create(PP_Instance instance,
  44                             PP_Resource config_id,
  45                             PPB_Audio_Callback audio_callback,
  46                             void* user_data);
  47
  48   // Initialization function for trusted init.
  49   bool Init(PP_Resource config_id,
  50             PPB_Audio_Callback user_callback,
  51             void* user_data);
  52
  53   // Resource overrides.
  54   virtual ::ppapi::thunk::PPB_Audio_API* AsPPB_Audio_API();
  55
  56   // PPB_Audio_API implementation.
  57   virtual PP_Resource GetCurrentConfig() OVERRIDE;
  58   virtual PP_Bool StartPlayback() OVERRIDE;
  59   virtual PP_Bool StopPlayback() OVERRIDE;
  60   virtual int32_t OpenTrusted(
  61       PP_Resource config_id,
  62       scoped_refptr< ::ppapi::TrackedCallback> create_callback) OVERRIDE;
  63   virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
  64   virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;
  65
  66  private:
  67   // AudioHelper implementation.
  68   virtual void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
  69                                size_t shared_memory_size_,
  70                                base::SyncSocket::Handle socket);
  71
  72   // AudioConfig used for creating this Audio object. We own a ref.
  73   ::ppapi::ScopedPPResource config_;
  74
  75   // PluginDelegate audio object that we delegate audio IPC through. We don't
  76   // own this pointer but are responsible for calling Shutdown on it.
  77   PluginDelegate::PlatformAudioOutput* audio_;
  78
  79   // Track frame count for passing on to PPB_Audio_Shared::SetStreamInfo().
  80   int sample_frame_count_;
  81
  82   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Impl);
  83 };
  84
  85 }  // namespace ppapi
  86 }  // namespace webkit
  87
  88 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_IMPL_H_