Implementation of ppapi audio.

webkit/plugins/ppapi/ppb_audio_input_impl.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_PPB_AUDIO_INPUT_IMPL_H_
+#define WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_INPUT_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/shared_memory.h"
+#include "base/sync_socket.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/dev/ppb_audio_input_dev.h"
+#include "ppapi/c/trusted/ppb_audio_input_trusted_dev.h"
+#include "ppapi/shared_impl/audio_input_impl.h"
+#include "ppapi/shared_impl/scoped_pp_resource.h"
+#include "ppapi/shared_impl/resource.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+
+namespace webkit {
+namespace ppapi {
+
+// Some of the backend functionality of this class is implemented by the
+// AudioInputImpl so it can be shared with the proxy.
+class PPB_AudioInput_Impl : public ::ppapi::Resource,
+                            public ::ppapi::AudioInputImpl,
+                            public PluginDelegate::PlatformAudioInput::Client {
+ public:
+  // Trusted initialization. You must call Init after this.
+  //
+  // Untrusted initialization should just call the static Create() function
+  // to properly create & initialize this class.
+  explicit PPB_AudioInput_Impl(PP_Instance instance);
+
+  virtual ~PPB_AudioInput_Impl();
+
+  // Creation function for untrusted plugins. This handles all initialization
+  // and will return 0 on failure.
+  static PP_Resource Create(PP_Instance instance,
+                            PPB_AudioInput_Callback audio_input_callback,
+                            void* user_data);
+
+  // Initialization function for non-trusted init.
+  bool Init(PPB_AudioInput_Callback callback, void* user_data);
+
+  // Resource overrides.
+  virtual ::ppapi::thunk::PPB_AudioInput_API* AsPPB_AudioInput_API();
+
+  // PPB_AudioInput_API implementation.
+  virtual PP_Bool StartCapture() OVERRIDE;
+  virtual PP_Bool StopCapture() OVERRIDE;
+
+  virtual int32_t OpenTrusted(PP_CompletionCallback create_callback) OVERRIDE;
+  virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE;
+  virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE;
+
+ private:
+  // PluginDelegate::PlatformAudioInput::Client implementation.
+  virtual void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
+                             size_t shared_memory_size_,
+                             base::SyncSocket::Handle socket);
+
+  // PluginDelegate audio input object that we delegate audio IPC through.
+  // We don't own this pointer but are responsible for calling Shutdown on it.
+  PluginDelegate::PlatformAudioInput* audio_input_;
+
+  // 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(PPB_AudioInput_Impl);
+};
+
+}  // namespace ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_PLUGINS_PPAPI_PPB_AUDIO_INPUT_IMPL_H_