Implementation of ppapi audio.

ppapi/proxy/ppb_audio_input_proxy.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 PPAPI_PPB_AUDIO_INPUT_PROXY_H_
+#define PPAPI_PPB_AUDIO_INPUT_PROXY_H_
+
+#include <utility>
+
+#include "base/basictypes.h"
+#include "base/shared_memory.h"
+#include "base/sync_socket.h"
+#include "ipc/ipc_platform_file.h"
+#include "ppapi/c/dev/ppb_audio_input_dev.h"
+#include "ppapi/c/ppb_audio_config.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
+
+
+struct PPB_AudioInput_Dev;
+
+namespace ppapi {
+
+class HostResource;
+
+namespace proxy {
+
+class PPB_AudioInput_Proxy : public InterfaceProxy {
+ public:
+  explicit PPB_AudioInput_Proxy(Dispatcher* dispatcher);
+  virtual ~PPB_AudioInput_Proxy();
+
+  static PP_Resource CreateProxyResource(PP_Instance instance,
+                           PP_Resource config_id,
+                           PPB_AudioInput_Callback audio_input_callback,
+                           void* user_data);
+
+  // InterfaceProxy implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+
+  static const ApiID kApiID = API_ID_PPB_AUDIO_INPUT_DEV;
+
+ private:
+  // Message handlers.
+  // Plugin->renderer message handlers.
+  void OnMsgCreate(PP_Instance instance_id,
+                   int32_t sample_rate,
+                   uint32_t sample_frame_count,
+                   ppapi::HostResource* result);
+  void OnMsgStartOrStop(const ppapi::HostResource& audio_id, bool capture);
+
+  // Renderer->plugin message handlers.
+  void OnMsgNotifyAudioStreamCreated(const ppapi::HostResource& audio_id,
+                                     int32_t result_code,
+                                     IPC::PlatformFileForTransit socket_handle,
+                                     base::SharedMemoryHandle handle,
+                                     uint32_t length);
+
+  void AudioInputChannelConnected(int32_t result,
+                                  const ppapi::HostResource& resource);
+
+  // In the renderer, this is called in response to a stream created message.
+  // It will retrieve the shared memory and socket handles and place them into
+  // the given out params. The return value is a PPAPI error code.
+  //
+  // The input arguments should be initialized to 0 or -1, depending on the
+  // platform's default invalid handle values. On error, some of these
+  // arguments may be written to, and others may be untouched, depending on
+  // where the error occurred.
+  int32_t GetAudioInputConnectedHandles(
+      const ppapi::HostResource& resource,
+      IPC::PlatformFileForTransit* foreign_socket_handle,
+      base::SharedMemoryHandle* foreign_shared_memory_handle,
+      uint32_t* shared_memory_length);
+
+  pp::CompletionCallbackFactory<PPB_AudioInput_Proxy,
+                                ProxyNonThreadSafeRefCount> callback_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PPB_AudioInput_Proxy);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PPB_AUDIO_INPUT_PROXY_H_
+