1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_RENDERER_PEPPER_AUDIO_HELPER_H_
6#define CONTENT_RENDERER_PEPPER_AUDIO_HELPER_H_
7
8#include "base/basictypes.h"
9#include "base/memory/scoped_ptr.h"
10#include "base/memory/shared_memory.h"
11#include "base/sync_socket.h"
12#include "ppapi/c/pp_completion_callback.h"
13#include "ppapi/shared_impl/resource.h"
14#include "ppapi/shared_impl/scoped_pp_resource.h"
15#include "ppapi/shared_impl/tracked_callback.h"
16
17namespace content {
18
19class AudioHelper {
20 public:
21  AudioHelper();
22  virtual ~AudioHelper();
23
24  // Called when the stream is created.
25  void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
26                     size_t shared_memory_size_,
27                     base::SyncSocket::Handle socket);
28
29  void SetCreateCallback(scoped_refptr<ppapi::TrackedCallback> create_callback);
30
31 protected:
32  // TODO(viettrungluu): This is all very poorly thought out. Refactor.
33
34  // To be called by implementations of |PPB_Audio_API|/|PPB_AudioInput_API|.
35  int32_t GetSyncSocketImpl(int* sync_socket);
36  int32_t GetSharedMemoryImpl(int* shm_handle, uint32_t* shm_size);
37
38  // To be implemented by subclasses to call their |SetStreamInfo()|.
39  virtual void OnSetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
40                               size_t shared_memory_size,
41                               base::SyncSocket::Handle socket_handle) = 0;
42
43 private:
44  scoped_refptr<ppapi::TrackedCallback> create_callback_;
45
46  // When a create callback is being issued, these will save the info for
47  // querying from the callback. The proxy uses this to get the handles to the
48  // other process instead of mapping them in the renderer. These will be
49  // invalid all other times.
50  scoped_ptr<base::SharedMemory> shared_memory_for_create_callback_;
51  size_t shared_memory_size_for_create_callback_;
52  scoped_ptr<base::SyncSocket> socket_for_create_callback_;
53
54  DISALLOW_COPY_AND_ASSIGN(AudioHelper);
55};
56
57}  // namespace content
58
59#endif  // CONTENT_RENDERER_PEPPER_AUDIO_HELPER_H_
60