Microphone support for Pepper Flash.

webkit/plugins/ppapi/audio_helper.h

+// Copyright (c) 2011 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_PLUGINS_PPAPI_AUDIO_HELPER_H_
+#define WEBKIT_PLUGINS_PPAPI_AUDIO_HELPER_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/shared_memory.h"
+#include "base/sync_socket.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/shared_impl/resource.h"
+#include "ppapi/shared_impl/scoped_pp_resource.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+
+namespace webkit {
+namespace ppapi {
+
+class AudioHelper : public PluginDelegate::PlatformAudioCommonClient {
+ public:
+  AudioHelper();
+  virtual ~AudioHelper();
+
+  // |PluginDelegate::PlatformAudioCommonClient| implementation.
+  virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
+                             size_t shared_memory_size_,
+                             base::SyncSocket::Handle socket) OVERRIDE;
+
+  void SetCallbackInfo(bool create_callback_pending,
+                       PP_CompletionCallback create_callback);
+
+ protected:
+  // TODO(viettrungluu): This is all very poorly thought out. Refactor.
+
+  // To be called by implementations of |PPB_Audio_API|/|PPB_AudioInput_API|.
+  int32_t GetSyncSocketImpl(int* sync_socket);
+  int32_t GetSharedMemoryImpl(int* shm_handle, uint32_t* shm_size);
+
+  // To be implemented by subclasses to call their |SetStreamInfo()|.
+  virtual void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
+                               size_t shared_memory_size,
+                               base::SyncSocket::Handle socket_handle) = 0;
+
+ private:
+  // 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 be
+  // invalid all other times.
+  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_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioHelper);
+};
+
+}  // namespace ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_PLUGINS_PPAPI_AUDIO_HELPER_H_