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      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_
     82