// Copyright (c) 2012 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_PROXY_PPB_AUDIO_INPUT_PROXY_H_
#define PPAPI_PROXY_PPB_AUDIO_INPUT_PROXY_H_

#include <string>
#include <utility>
#include <vector>

#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/proxy/interface_proxy.h"
#include "ppapi/proxy/proxy_completion_callback_factory.h"
#include "ppapi/proxy/serialized_structs.h"
#include "ppapi/utility/completion_callback_factory.h"

namespace ppapi {

class HostResource;
struct DeviceRefData;

namespace proxy {

class PPB_AudioInput_Proxy : public InterfaceProxy {
 public:
  explicit PPB_AudioInput_Proxy(Dispatcher* dispatcher);
  virtual ~PPB_AudioInput_Proxy();

  static PP_Resource CreateProxyResource0_1(
      PP_Instance instance,
      PP_Resource config,
      PPB_AudioInput_Callback audio_input_callback,
      void* user_data);

  static PP_Resource CreateProxyResource(PP_Instance instance);

  // 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, ppapi::HostResource* result);
  void OnMsgEnumerateDevices(const ppapi::HostResource& audio_input);
  void OnMsgOpen(const ppapi::HostResource& audio_input,
                 const std::string& device_id,
                 int32_t sample_rate,
                 uint32_t sample_frame_count);
  void OnMsgStartOrStop(const ppapi::HostResource& audio_input, bool capture);
  void OnMsgClose(const ppapi::HostResource& audio_input);

  // Renderer->plugin message handlers.
  void OnMsgEnumerateDevicesACK(
      const ppapi::HostResource& audio_input,
      int32_t result,
      const std::vector<ppapi::DeviceRefData>& devices);
  void OnMsgOpenACK(const ppapi::HostResource& audio_input,
                    int32_t result,
                    const ppapi::proxy::SerializedHandle& socket_handle,
                    const ppapi::proxy::SerializedHandle& handle);

  void EnumerateDevicesACKInHost(int32_t result,
                                 const ppapi::HostResource& audio_input);
  void OpenACKInHost(int32_t result, const ppapi::HostResource& audio_input);

  // In the renderer, this is called in response to an OpenACK 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);

  ProxyCompletionCallbackFactory<PPB_AudioInput_Proxy> callback_factory_;

  DISALLOW_COPY_AND_ASSIGN(PPB_AudioInput_Proxy);
};

}  // namespace proxy
}  // namespace ppapi

#endif  // PPAPI_PROXY_PPB_AUDIO_INPUT_PROXY_H_