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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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29 #ifndef ReverbInputBuffer_h | 29 #ifndef ReverbInputBuffer_h |
30 #define ReverbInputBuffer_h | 30 #define ReverbInputBuffer_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/Noncopyable.h" | 35 #include "wtf/Noncopyable.h" |
36 | 36 |
37 namespace blink { | 37 namespace blink { |
38 | 38 |
39 // ReverbInputBuffer is used to buffer input samples for deferred processing by
the background threads. | 39 // ReverbInputBuffer is used to buffer input samples for deferred processing by |
| 40 // the background threads. |
40 class PLATFORM_EXPORT ReverbInputBuffer { | 41 class PLATFORM_EXPORT ReverbInputBuffer { |
41 DISALLOW_NEW(); | 42 DISALLOW_NEW(); |
42 WTF_MAKE_NONCOPYABLE(ReverbInputBuffer); | 43 WTF_MAKE_NONCOPYABLE(ReverbInputBuffer); |
43 | 44 |
44 public: | 45 public: |
45 ReverbInputBuffer(size_t length); | 46 ReverbInputBuffer(size_t length); |
46 | 47 |
47 // The realtime audio thread keeps writing samples here. | 48 // The realtime audio thread keeps writing samples here. |
48 // The assumption is that the buffer's length is evenly divisible by numberOfF
rames (for nearly all cases this will be fine). | 49 // The assumption is that the buffer's length is evenly divisible by |
| 50 // numberOfFrames (for nearly all cases this will be fine). |
49 // FIXME: remove numberOfFrames restriction... | 51 // FIXME: remove numberOfFrames restriction... |
50 void write(const float* sourceP, size_t numberOfFrames); | 52 void write(const float* sourceP, size_t numberOfFrames); |
51 | 53 |
52 // Background threads can call this to check if there's anything to read... | 54 // Background threads can call this to check if there's anything to read... |
53 size_t writeIndex() const { return m_writeIndex; } | 55 size_t writeIndex() const { return m_writeIndex; } |
54 | 56 |
55 // The individual background threads read here (and hope that they can keep up
with the buffer writing). | 57 // The individual background threads read here (and hope that they can keep up |
| 58 // with the buffer writing). |
56 // readIndex is updated with the next readIndex to read from... | 59 // readIndex is updated with the next readIndex to read from... |
57 // The assumption is that the buffer's length is evenly divisible by numberOfF
rames. | 60 // The assumption is that the buffer's length is evenly divisible by |
| 61 // numberOfFrames. |
58 // FIXME: remove numberOfFrames restriction... | 62 // FIXME: remove numberOfFrames restriction... |
59 float* directReadFrom(int* readIndex, size_t numberOfFrames); | 63 float* directReadFrom(int* readIndex, size_t numberOfFrames); |
60 | 64 |
61 void reset(); | 65 void reset(); |
62 | 66 |
63 private: | 67 private: |
64 AudioFloatArray m_buffer; | 68 AudioFloatArray m_buffer; |
65 size_t m_writeIndex; | 69 size_t m_writeIndex; |
66 }; | 70 }; |
67 | 71 |
68 } // namespace blink | 72 } // namespace blink |
69 | 73 |
70 #endif // ReverbInputBuffer_h | 74 #endif // ReverbInputBuffer_h |
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