ppb_audio_config_shared.h revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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 PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_
6#define PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "ppapi/shared_impl/resource.h"
11#include "ppapi/thunk/ppb_audio_config_api.h"
12
13namespace ppapi {
14
15const int kBitsPerAudioInputSample = 16;
16const int kAudioInputChannels = 1;
17
18// TODO(dalecurtis, yzshen): PPAPI shouldn't hard code these values for all
19// clients.
20const int kBitsPerAudioOutputSample = 16;
21const int kAudioOutputChannels = 2;
22
23class PPAPI_SHARED_EXPORT PPB_AudioConfig_Shared
24    : public Resource,
25      public thunk::PPB_AudioConfig_API {
26 public:
27  virtual ~PPB_AudioConfig_Shared();
28
29  static PP_Resource Create(ResourceObjectType type,
30                            PP_Instance instance,
31                            PP_AudioSampleRate sample_rate,
32                            uint32_t sample_frame_count);
33  static uint32_t RecommendSampleFrameCount_1_0(
34      PP_AudioSampleRate sample_rate,
35      uint32_t request_sample_frame_count);
36  static uint32_t RecommendSampleFrameCount_1_1(
37      PP_Instance instance,
38      PP_AudioSampleRate sample_rate,
39      uint32_t request_sample_frame_count);
40  static PP_AudioSampleRate RecommendSampleRate(PP_Instance);
41
42  // Resource overrides.
43  virtual thunk::PPB_AudioConfig_API* AsPPB_AudioConfig_API() OVERRIDE;
44
45  // PPB_AudioConfig_API implementation.
46  virtual PP_AudioSampleRate GetSampleRate() OVERRIDE;
47  virtual uint32_t GetSampleFrameCount() OVERRIDE;
48
49 private:
50  // You must call Init before using this object.
51  PPB_AudioConfig_Shared(ResourceObjectType type, PP_Instance instance);
52
53  // Returns false if the arguments are invalid, the object should not be
54  // used in this case.
55  bool Init(PP_AudioSampleRate sample_rate, uint32_t sample_frame_count);
56
57  PP_AudioSampleRate sample_rate_;
58  uint32_t sample_frame_count_;
59
60  DISALLOW_COPY_AND_ASSIGN(PPB_AudioConfig_Shared);
61};
62
63}  // namespace ppapi
64
65#endif  // PPAPI_SHARED_IMPL_PPB_AUDIO_CONFIG_SHARED_H_
66