Rewrite PPB_AudioInput_Dev to use the new-style host/resource.

ppapi/shared_impl/ppb_audio_input_shared.h

-// 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_SHARED_IMPL_PPB_AUDIO_INPUT_SHARED_H_
-#define PPAPI_SHARED_IMPL_PPB_AUDIO_INPUT_SHARED_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/shared_memory.h"
-#include "base/sync_socket.h"
-#include "base/threading/simple_thread.h"
-#include "ppapi/c/dev/ppb_audio_input_dev.h"
-#include "ppapi/c/ppb_audio_config.h"
-#include "ppapi/shared_impl/resource.h"
-#include "ppapi/shared_impl/scoped_pp_resource.h"
-#include "ppapi/shared_impl/tracked_callback.h"
-#include "ppapi/thunk/ppb_audio_input_api.h"
-
-namespace ppapi {
-
-// Implements the logic to map shared memory and run the audio thread signaled
-// from the sync socket. Both the proxy and the renderer implementation use
-// this code.
-class PPAPI_SHARED_EXPORT PPB_AudioInput_Shared
-    : public Resource,
-      public thunk::PPB_AudioInput_API,
-      public base::DelegateSimpleThread::Delegate {
- public:
-  // Used by the proxy.
-  explicit PPB_AudioInput_Shared(const HostResource& audio_input);
-  // Used by the impl.
-  explicit PPB_AudioInput_Shared(PP_Instance instance);
-  virtual ~PPB_AudioInput_Shared();
-
-  // Resource overrides.
-  virtual thunk::PPB_AudioInput_API* AsPPB_AudioInput_API() OVERRIDE;
-
-  // Implementation of PPB_AudioInput_API non-trusted methods.
-  virtual int32_t EnumerateDevices(
-      PP_Resource* devices,
-      scoped_refptr<TrackedCallback> callback) OVERRIDE;
-  virtual int32_t Open(const std::string& device_id,
-                       PP_Resource config,
-                       PPB_AudioInput_Callback audio_input_callback,
-                       void* user_data,
-                       scoped_refptr<TrackedCallback> callback) OVERRIDE;
-  virtual PP_Resource GetCurrentConfig() OVERRIDE;
-  virtual PP_Bool StartCapture() OVERRIDE;
-  virtual PP_Bool StopCapture() OVERRIDE;
-  virtual void Close() OVERRIDE;
-
-  void OnEnumerateDevicesComplete(int32_t result,
-                                  const std::vector<DeviceRefData>& devices);
-  void OnOpenComplete(int32_t result,
-                      base::SharedMemoryHandle shared_memory_handle,
-                      size_t shared_memory_size,
-                      base::SyncSocket::Handle socket_handle);
-
-  static scoped_refptr<TrackedCallback> MakeIgnoredCompletionCallback(
-      Resource* resource);
-
- protected:
-  enum OpenState {
-    BEFORE_OPEN,
-    OPENED,
-    CLOSED
-  };
-
-  // Subclasses should implement these methods to do impl- and proxy-specific
-  // work.
-  virtual int32_t InternalEnumerateDevices(
-      PP_Resource* devices,
-      scoped_refptr<TrackedCallback> callback) = 0;
-  virtual int32_t InternalOpen(const std::string& device_id,
-                               PP_AudioSampleRate sample_rate,
-                               uint32_t sample_frame_count,
-                               scoped_refptr<TrackedCallback> callback) = 0;
-  virtual PP_Bool InternalStartCapture() = 0;
-  virtual PP_Bool InternalStopCapture() = 0;
-  virtual void InternalClose() = 0;
-
-  // Configures the current state to be capturing or not. The caller is
-  // responsible for ensuring the new state is the opposite of the current one.
-  //
-  // This is the implementation for PPB_AudioInput.Start/StopCapture, except
-  // that it does not actually notify the audio system to stop capture, it just
-  // configures our object to stop generating callbacks. The actual stop
-  // capture request will be done in the derived classes and will be different
-  // from the proxy and the renderer.
-  void SetStartCaptureState();
-  void SetStopCaptureState();
-
-  // Sets the shared memory and socket handles. This will automatically start
-  // capture if we're currently set to capture.
-  void SetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
-                     size_t shared_memory_size,
-                     base::SyncSocket::Handle socket_handle);
-
-  // Starts execution of the audio input thread.
-  void StartThread();
-
-  // Stops execution of the audio input thread.
-  void StopThread();
-
-  // DelegateSimpleThread::Delegate implementation.
-  // Run on the audio input thread.
-  virtual void Run();
-
-  // The common implementation of OpenTrusted() and Open(). It will call
-  // InternalOpen() to do impl- and proxy-specific work.
-  // OpenTrusted() will call this methods with a NULL |audio_input_callback|,
-  // in this case, the thread will not be run. This non-callback mode is used in
-  // the renderer with the proxy, since the proxy handles the callback entirely
-  // within the plugin process.
-  int32_t CommonOpen(const std::string& device_id,
-                     PP_Resource config,
-                     PPB_AudioInput_Callback audio_input_callback,
-                     void* user_data,
-                     scoped_refptr<TrackedCallback> callback);
-
-  OpenState open_state_;
-
-  // True if capturing the stream.
-  bool capturing_;
-
-  // Socket used to notify us when new samples are available. This pointer is
-  // created in SetStreamInfo().
-  scoped_ptr<base::CancelableSyncSocket> socket_;
-
-  // Sample buffer in shared memory. This pointer is created in
-  // SetStreamInfo(). 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_input_thread_;
-
-  // Callback to call when new samples are available.
-  PPB_AudioInput_Callback audio_input_callback_;
-
-  // User data pointer passed verbatim to the callback function.
-  void* user_data_;
-
-  scoped_refptr<TrackedCallback> enumerate_devices_callback_;
-  scoped_refptr<TrackedCallback> open_callback_;
-
-  // Owning reference to the current config object. This isn't actually used,
-  // we just dish it out as requested by the plugin.
-  ScopedPPResource config_;
-
-  // Output parameter of EnumerateDevices(). It should not be accessed after
-  // |enumerate_devices_callback_| is run.
-  PP_Resource* devices_;
-
-  ResourceObjectType resource_object_type_;
-
-  DISALLOW_COPY_AND_ASSIGN(PPB_AudioInput_Shared);
-};
-
-}  // namespace ppapi
-
-#endif  // PPAPI_SHARED_IMPL_PPB_AUDIO_INPUT_SHARED_H_