2e1f33ec9f28691126f31d5623477672cc485d36
[platform/framework/web/crosswalk-tizen.git] /
1 /*
2  * Copyright (C) 2010 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1.  Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  * 2.  Redistributions in binary form must reproduce the above copyright
11  *     notice, this list of conditions and the following disclaimer in the
12  *     documentation and/or other materials provided with the distribution.
13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14  *     its contributors may be used to endorse or promote products derived
15  *     from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28
29 #ifndef AudioBuffer_h
30 #define AudioBuffer_h
31
32 #include "bindings/core/v8/ScriptWrappable.h"
33 #include "core/dom/DOMTypedArray.h"
34 #include "modules/ModulesExport.h"
35 #include "wtf/PassRefPtr.h"
36 #include "wtf/RefPtr.h"
37 #include "wtf/Vector.h"
38 #include "wtf/build_config.h"
39
40 namespace blink {
41
42 class AudioBus;
43 class AudioBufferOptions;
44 class BaseAudioContext;
45 class ExceptionState;
46
47 class MODULES_EXPORT AudioBuffer final : public GarbageCollected<AudioBuffer>,
48                                          public ScriptWrappable {
49   DEFINE_WRAPPERTYPEINFO();
50
51  public:
52   static AudioBuffer* create(unsigned numberOfChannels,
53                              size_t numberOfFrames,
54                              float sampleRate);
55   static AudioBuffer* create(unsigned numberOfChannels,
56                              size_t numberOfFrames,
57                              float sampleRate,
58                              ExceptionState&);
59   static AudioBuffer* create(BaseAudioContext*,
60                              const AudioBufferOptions&,
61                              ExceptionState&);
62
63   // Returns 0 if data is not a valid audio file.
64   static AudioBuffer* createFromAudioFileData(const void* data,
65                                               size_t dataSize,
66                                               bool mixToMono,
67                                               float sampleRate);
68
69   static AudioBuffer* createFromAudioBus(AudioBus*);
70
71   // Format
72   size_t length() const { return m_length; }
73   double duration() const {
74     return length() / static_cast<double>(sampleRate());
75   }
76   float sampleRate() const { return m_sampleRate; }
77
78   // Channel data access
79   unsigned numberOfChannels() const { return m_channels.size(); }
80   DOMFloat32Array* getChannelData(unsigned channelIndex, ExceptionState&);
81   DOMFloat32Array* getChannelData(unsigned channelIndex);
82   void copyFromChannel(DOMFloat32Array*, long channelNumber, ExceptionState&);
83   void copyFromChannel(DOMFloat32Array*,
84                        long channelNumber,
85                        unsigned long startInChannel,
86                        ExceptionState&);
87   void copyToChannel(DOMFloat32Array*, long channelNumber, ExceptionState&);
88   void copyToChannel(DOMFloat32Array*,
89                      long channelNumber,
90                      unsigned long startInChannel,
91                      ExceptionState&);
92
93   void zero();
94
95   DEFINE_INLINE_TRACE() { visitor->trace(m_channels); }
96
97  private:
98   explicit AudioBuffer(AudioBus*);
99
100   static DOMFloat32Array* createFloat32ArrayOrNull(size_t length);
101
102   AudioBuffer(unsigned numberOfChannels,
103               size_t numberOfFrames,
104               float sampleRate);
105   bool createdSuccessfully(unsigned desiredNumberOfChannels) const;
106
107   float m_sampleRate;
108   size_t m_length;
109
110   HeapVector<Member<DOMFloat32Array>> m_channels;
111 };
112
113 }  // namespace blink
114
115 #endif  // AudioBuffer_h