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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 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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38 class WebAudioBusPrivate; | 38 class WebAudioBusPrivate; |
39 | 39 |
40 // A container for multi-channel linear PCM audio data. | 40 // A container for multi-channel linear PCM audio data. |
41 // | 41 // |
42 // WARNING: It is not safe to pass a WebAudioBus across threads!!! | 42 // WARNING: It is not safe to pass a WebAudioBus across threads!!! |
43 // | 43 // |
44 class WebAudioBus { | 44 class WebAudioBus { |
45 public: | 45 public: |
46 WebAudioBus() : m_private(0) { } | 46 WebAudioBus() : m_private(0) { } |
47 ~WebAudioBus() { reset(); } | 47 ~WebAudioBus() { reset(); } |
48 | 48 |
49 // initialize() allocates memory of the given length for the given number of
channels. | 49 // initialize() allocates memory of the given length for the given number of
channels. |
50 WEBKIT_EXPORT void initialize(unsigned numberOfChannels, size_t length, doub
le sampleRate); | 50 WEBKIT_EXPORT void initialize(unsigned numberOfChannels, size_t length, doub
le sampleRate); |
51 | 51 |
52 // resizeSmaller() can only be called after initialize() with a new length <
= the initialization length. | 52 // resizeSmaller() can only be called after initialize() with a new length <
= the initialization length. |
53 // The data stored in the bus will remain undisturbed. | 53 // The data stored in the bus will remain undisturbed. |
54 WEBKIT_EXPORT void resizeSmaller(size_t newLength); | 54 WEBKIT_EXPORT void resizeSmaller(size_t newLength); |
55 | 55 |
56 // reset() releases the memory allocated from initialize(). | 56 // reset() releases the memory allocated from initialize(). |
57 WEBKIT_EXPORT void reset(); | 57 WEBKIT_EXPORT void reset(); |
58 | 58 |
59 WEBKIT_EXPORT unsigned numberOfChannels() const; | 59 WEBKIT_EXPORT unsigned numberOfChannels() const; |
60 WEBKIT_EXPORT size_t length() const; | 60 WEBKIT_EXPORT size_t length() const; |
61 WEBKIT_EXPORT double sampleRate() const; | 61 WEBKIT_EXPORT double sampleRate() const; |
62 | 62 |
63 WEBKIT_EXPORT float* channelData(unsigned channelIndex); | 63 WEBKIT_EXPORT float* channelData(unsigned channelIndex); |
64 | 64 |
65 #if WEBKIT_IMPLEMENTATION | 65 #if WEBKIT_IMPLEMENTATION |
66 WTF::PassRefPtr<WebCore::AudioBus> release(); | 66 WTF::PassRefPtr<WebCore::AudioBus> release(); |
67 #endif | 67 #endif |
68 | 68 |
69 private: | 69 private: |
70 // Disallow copy and assign. | 70 // Disallow copy and assign. |
71 WebAudioBus(const WebAudioBus&); | 71 WebAudioBus(const WebAudioBus&); |
72 void operator=(const WebAudioBus&); | 72 void operator=(const WebAudioBus&); |
73 | 73 |
74 WebCore::AudioBus* m_private; | 74 WebCore::AudioBus* m_private; |
75 }; | 75 }; |
76 | 76 |
77 } // namespace WebKit | 77 } // namespace WebKit |
78 | 78 |
79 #endif // WebAudioBus_h | 79 #endif // WebAudioBus_h |
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