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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 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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31 #if ENABLE(WEB_AUDIO) | 31 #if ENABLE(WEB_AUDIO) |
32 | 32 |
33 #include "core/platform/audio/AudioPullFIFO.h" | 33 #include "core/platform/audio/AudioPullFIFO.h" |
34 | 34 |
35 namespace WebCore { | 35 namespace WebCore { |
36 | 36 |
37 AudioPullFIFO::AudioPullFIFO(AudioSourceProvider& audioProvider, unsigned number OfChannels, size_t fifoLength, size_t providerSize) | 37 AudioPullFIFO::AudioPullFIFO(AudioSourceProvider& audioProvider, unsigned number OfChannels, size_t fifoLength, size_t providerSize) |
38 : m_provider(audioProvider) | 38 : m_provider(audioProvider) |
39 , m_fifo(numberOfChannels, fifoLength) | 39 , m_fifo(numberOfChannels, fifoLength) |
40 , m_providerSize(providerSize) | 40 , m_providerSize(providerSize) |
41 , m_tempBus(numberOfChannels, providerSize) | 41 , m_tempBus(new AudioBus(numberOfChannels, providerSize)) |
Chris Rogers
2013/05/02 17:48:46
adoptRef()
| |
42 { | 42 { |
43 } | 43 } |
44 | 44 |
45 void AudioPullFIFO::consume(AudioBus* destination, size_t framesToConsume) | 45 void AudioPullFIFO::consume(AudioBus* destination, size_t framesToConsume) |
46 { | 46 { |
47 if (!destination) | 47 if (!destination) |
48 return; | 48 return; |
49 | 49 |
50 if (framesToConsume > m_fifo.framesInFifo()) { | 50 if (framesToConsume > m_fifo.framesInFifo()) { |
51 // We don't have enough data in the FIFO to fulfill the request. Ask for more data. | 51 // We don't have enough data in the FIFO to fulfill the request. Ask for more data. |
52 fillBuffer(framesToConsume - m_fifo.framesInFifo()); | 52 fillBuffer(framesToConsume - m_fifo.framesInFifo()); |
53 } | 53 } |
54 | 54 |
55 m_fifo.consume(destination, framesToConsume); | 55 m_fifo.consume(destination, framesToConsume); |
56 } | 56 } |
57 | 57 |
58 void AudioPullFIFO::fillBuffer(size_t numberOfFrames) | 58 void AudioPullFIFO::fillBuffer(size_t numberOfFrames) |
59 { | 59 { |
60 // Keep asking the provider to give us data until we have received at least |numberOfFrames| of | 60 // Keep asking the provider to give us data until we have received at least |numberOfFrames| of |
61 // data. Stuff the data into the FIFO. | 61 // data. Stuff the data into the FIFO. |
62 size_t framesProvided = 0; | 62 size_t framesProvided = 0; |
63 | 63 |
64 while (framesProvided < numberOfFrames) { | 64 while (framesProvided < numberOfFrames) { |
65 m_provider.provideInput(&m_tempBus, m_providerSize); | 65 m_provider.provideInput(m_tempBus.get(), m_providerSize); |
66 | 66 |
67 m_fifo.push(&m_tempBus); | 67 m_fifo.push(m_tempBus.get()); |
68 | 68 |
69 framesProvided += m_providerSize; | 69 framesProvided += m_providerSize; |
70 } | 70 } |
71 } | 71 } |
72 | 72 |
73 } // namespace WebCore | 73 } // namespace WebCore |
74 | 74 |
75 #endif // ENABLE(WEB_AUDIO) | 75 #endif // ENABLE(WEB_AUDIO) |
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