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1 /* | 1 /* |
2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * | 7 * |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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30 #define AudioChannel_h | 30 #define AudioChannel_h |
31 | 31 |
32 #include "platform/PlatformExport.h" | 32 #include "platform/PlatformExport.h" |
33 #include "platform/audio/AudioArray.h" | 33 #include "platform/audio/AudioArray.h" |
34 #include "wtf/Allocator.h" | 34 #include "wtf/Allocator.h" |
35 #include "wtf/PtrUtil.h" | 35 #include "wtf/PtrUtil.h" |
36 #include <memory> | 36 #include <memory> |
37 | 37 |
38 namespace blink { | 38 namespace blink { |
39 | 39 |
40 // An AudioChannel represents a buffer of non-interleaved floating-point audio s
amples. | 40 // An AudioChannel represents a buffer of non-interleaved floating-point audio |
| 41 // samples. |
41 // The PCM samples are normally assumed to be in a nominal range -1.0 -> +1.0 | 42 // The PCM samples are normally assumed to be in a nominal range -1.0 -> +1.0 |
42 class PLATFORM_EXPORT AudioChannel { | 43 class PLATFORM_EXPORT AudioChannel { |
43 USING_FAST_MALLOC(AudioChannel); | 44 USING_FAST_MALLOC(AudioChannel); |
44 WTF_MAKE_NONCOPYABLE(AudioChannel); | 45 WTF_MAKE_NONCOPYABLE(AudioChannel); |
45 | 46 |
46 public: | 47 public: |
47 // Memory can be externally referenced, or can be internally allocated with an
AudioFloatArray. | 48 // Memory can be externally referenced, or can be internally allocated with an |
| 49 // AudioFloatArray. |
48 | 50 |
49 // Reference an external buffer. | 51 // Reference an external buffer. |
50 AudioChannel(float* storage, size_t length) | 52 AudioChannel(float* storage, size_t length) |
51 : m_length(length), m_rawPointer(storage), m_silent(false) {} | 53 : m_length(length), m_rawPointer(storage), m_silent(false) {} |
52 | 54 |
53 // Manage storage for us. | 55 // Manage storage for us. |
54 explicit AudioChannel(size_t length) | 56 explicit AudioChannel(size_t length) |
55 : m_length(length), m_rawPointer(nullptr), m_silent(true) { | 57 : m_length(length), m_rawPointer(nullptr), m_silent(true) { |
56 m_memBuffer = wrapUnique(new AudioFloatArray(length)); | 58 m_memBuffer = wrapUnique(new AudioFloatArray(length)); |
57 } | 59 } |
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124 size_t m_length; | 126 size_t m_length; |
125 | 127 |
126 float* m_rawPointer; | 128 float* m_rawPointer; |
127 std::unique_ptr<AudioFloatArray> m_memBuffer; | 129 std::unique_ptr<AudioFloatArray> m_memBuffer; |
128 bool m_silent; | 130 bool m_silent; |
129 }; | 131 }; |
130 | 132 |
131 } // namespace blink | 133 } // namespace blink |
132 | 134 |
133 #endif // AudioChannel_h | 135 #endif // AudioChannel_h |
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