Initial audio implementation.

webkit/glue/plugins/pepper_audio.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_GLUE_PLUGINS_PEPPER_DEVICE_CONTEXT_AUDIO_H_
 #define WEBKIT_GLUE_PLUGINS_PEPPER_DEVICE_CONTEXT_AUDIO_H_
 
 #include "base/ref_counted.h"
-#include "base/scoped_ptr.h"
 #include "base/shared_memory.h"
-#include "base/simple_thread.h"
 #include "base/sync_socket.h"
 #include "ppapi/c/dev/ppb_audio_dev.h"
 #include "ppapi/c/dev/ppb_audio_config_dev.h"
 #include "ppapi/c/dev/ppb_audio_trusted_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/shared_impl/audio_impl.h"
 #include "webkit/glue/plugins/pepper_plugin_delegate.h"
 #include "webkit/glue/plugins/pepper_plugin_instance.h"
 #include "webkit/glue/plugins/pepper_plugin_module.h"
 #include "webkit/glue/plugins/pepper_resource.h"
 
 namespace pepper {
 
 class PluginInstance;
 class PluginModule;
 
 class AudioConfig : public Resource {
  public:
   AudioConfig(PluginModule* module,
               PP_AudioSampleRate_Dev sample_rate,
               uint32_t sample_frame_count);
   size_t BufferSize();
   static const PPB_AudioConfig_Dev* GetInterface();
 
   PP_AudioSampleRate_Dev sample_rate() { return sample_rate_; }
   uint32_t sample_frame_count() { return sample_frame_count_; }
 
  private:
   // Resource override.
   virtual AudioConfig* AsAudioConfig();
 
   PP_AudioSampleRate_Dev sample_rate_;
   uint32_t sample_frame_count_;
 };
 
+// Some of the backend functionality of this class is implemented by the
+// AudioImpl so it can be shared with the proxy.
 class Audio : public Resource,
-              public PluginDelegate::PlatformAudio::Client,
-              public base::DelegateSimpleThread::Delegate {
+              public pp::shared_impl::AudioImpl,
+              public PluginDelegate::PlatformAudio::Client {
  public:
   explicit Audio(PluginModule* module, PP_Instance instance_id);
   virtual ~Audio();
 
   static const PPB_Audio_Dev* GetInterface();
   static const PPB_AudioTrusted_Dev* GetTrustedInterface();
 
-  bool Init(PluginDelegate* plugin_delegate,
-            PP_Resource config_id,
-            PPB_Audio_Callback user_callback, void* user_data);
-
-  int32_t Open(PluginDelegate* plugin_delegate,
-               PP_Resource config_id,
-               PP_CompletionCallback create_callback);
-
-  PP_Resource GetCurrentConfiguration() {
-    return config_->GetReference();
-  }
-
   PP_Instance pp_instance() {
     return pp_instance_;
   }
 
+  // PPB_Audio implementation.
+  bool Init(PluginDelegate* plugin_delegate,
+            PP_Resource config_id,
+            PPB_Audio_Callback user_callback, void* user_data);
+  PP_Resource GetCurrentConfig();
+  bool StartPlayback();
+  bool StopPlayback();
+
+  // PPB_Audio_Trusted implementation.
+  int32_t Open(PluginDelegate* plugin_delegate,
+               PP_Resource config_id,
+               PP_CompletionCallback create_callback);
   int32_t GetSyncSocket(int* sync_socket);
-
   int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size);
 
-  bool StartPlayback();
-
-  bool StopPlayback();
-
   // Resource override.
   virtual Audio* AsAudio();
 
  private:
   // pepper::PluginDelegate::PlatformAudio::Client implementation.
   virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
                              size_t shared_memory_size_,
                              base::SyncSocket::Handle socket);
-  // End of pepper::PluginDelegate::PlatformAudio::Client implementation.
-
-  // Audio thread. DelegateSimpleThread::Delegate implementation.
-  virtual void Run();
-  // End of DelegateSimpleThread::Delegate implementation.
-
-  // True if playing the stream.
-  bool playing_;
 
   // AudioConfig used for creating this Audio object.
   scoped_refptr<AudioConfig> config_;
 
-  // Instance id
+  // Plugin instance that owns this audio object.
   PP_Instance pp_instance_;
 
   // PluginDelegate audio object that we delegate audio IPC through.
   PluginDelegate::PlatformAudio* audio_;
 
-  // Socket used to notify us when audio is ready to accept new samples. This
-  // pointer is created in StreamCreated().
-  scoped_ptr<base::SyncSocket> socket_;
-
-  // Sample buffer in shared memory. This pointer is created in
-  // StreamCreated(). The memory is only mapped when the audio thread is
-  // created.
-  scoped_ptr<base::SharedMemory> shared_memory_;
-
-  // The size of the sample buffer in bytes.
-  size_t shared_memory_size_;
-
-  // When the callback is set, this thread is spawned for calling it.
-  scoped_ptr<base::DelegateSimpleThread> audio_thread_;
-
-  // Callback to call when audio is ready to accept new samples.
-  volatile PPB_Audio_Callback callback_;
-
-  // User data pointer passed verbatim to the callback function.
-  void* user_data_;
-
   // Is a create callback pending to fire?
   bool create_callback_pending_;
 
   // Trusted callback invoked from StreamCreated.
   PP_CompletionCallback create_callback_;
+
+  // When a create callback is being issued, these will save the info for
+  // querying from the callback. The proxy uses this to get the handles to the
+  // other process instead of mapping them in the renderer. These will are
+  // invalid all other times.

[nfullagar, 2010/12/01 23:34:21]

check last sentence above.  "These will are..."

+  scoped_ptr<base::SharedMemory> shared_memory_for_create_callback_;
+  size_t shared_memory_size_for_create_callback_;
+  scoped_ptr<base::SyncSocket> socket_for_create_callback_;
 };
 
 }  // namespace pepper
 
 #endif  // WEBKIT_GLUE_PLUGINS_PEPPER_DEVICE_CONTEXT_AUDIO_H_