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/public/renderer/plugin_instance_throttler.h"
  13 #include "content/renderer/pepper/audio_helper.h"
  14 #include "ppapi/c/pp_completion_callback.h"
  15 #include "ppapi/c/ppb_audio.h"
  16 #include "ppapi/c/ppb_audio_config.h"
  17 #include "ppapi/shared_impl/ppb_audio_config_shared.h"
  18 #include "ppapi/shared_impl/ppb_audio_shared.h"
  19 #include "ppapi/shared_impl/resource.h"
  20 #include "ppapi/shared_impl/scoped_pp_resource.h"
  21
  22 namespace content {
  23 class PepperPlatformAudioOutput;
  24
  25 // Some of the backend functionality of this class is implemented by the
  26 // PPB_Audio_Shared so it can be shared with the proxy.
  27 //
  28 // TODO(teravest): PPB_Audio is no longer supported in-process. Clean this up
  29 // to look more like typical HostResource implementations.
  30 class PPB_Audio_Impl : public ppapi::Resource,
  31                        public ppapi::PPB_Audio_Shared,
  32                        public AudioHelper,
  33                        public PluginInstanceThrottler::Observer {
  34  public:
  35   explicit PPB_Audio_Impl(PP_Instance instance);
  36
  37   // Resource overrides.
  38   ppapi::thunk::PPB_Audio_API* AsPPB_Audio_API() override;
  39
  40   // PPB_Audio_API implementation.
  41   PP_Resource GetCurrentConfig() override;
  42   PP_Bool StartPlayback() override;
  43   PP_Bool StopPlayback() override;
  44   int32_t Open(PP_Resource config_id,
  45                scoped_refptr<ppapi::TrackedCallback> create_callback) override;
  46   int32_t GetSyncSocket(int* sync_socket) override;
  47   int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) override;
  48
  49  private:
  50   ~PPB_Audio_Impl() override;
  51
  52   // AudioHelper implementation.
  53   void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
  54                        size_t shared_memory_size_,
  55                        base::SyncSocket::Handle socket) override;
  56
  57   // PluginInstanceThrottler::Observer implementation.
  58   void OnThrottleStateChange() override;
  59
  60   // Starts the deferred playback and unsubscribes from the throttler.
  61   void StartDeferredPlayback();
  62
  63   // AudioConfig used for creating this Audio object. We own a ref.
  64   ppapi::ScopedPPResource config_;
  65
  66   // PluginDelegate audio object that we delegate audio IPC through. We don't
  67   // own this pointer but are responsible for calling Shutdown on it.
  68   PepperPlatformAudioOutput* audio_;
  69
  70   // Stream is playing, but throttled due to Plugin Power Saver.
  71   bool playback_throttled_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Impl);
  74 };
  75
  76 }  // namespace content
  77
  78 #endif  // CONTENT_RENDERER_PEPPER_PPB_AUDIO_IMPL_H_