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Side by Side Diff: third_party/WebKit/Source/platform/audio/AudioFIFO.h

Issue 2384073002: reflow comments in platform/audio (Closed)
Patch Set: comments (heh!) Created 4 years, 2 months ago
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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
(...skipping 21 matching lines...) Expand all
32 #include "platform/audio/AudioBus.h" 32 #include "platform/audio/AudioBus.h"
33 #include "wtf/Allocator.h" 33 #include "wtf/Allocator.h"
34 34
35 namespace blink { 35 namespace blink {
36 36
37 class AudioFIFO { 37 class AudioFIFO {
38 USING_FAST_MALLOC(AudioFIFO); 38 USING_FAST_MALLOC(AudioFIFO);
39 WTF_MAKE_NONCOPYABLE(AudioFIFO); 39 WTF_MAKE_NONCOPYABLE(AudioFIFO);
40 40
41 public: 41 public:
42 // Create a FIFO large enough to hold |fifoLength| frames of data of |numberOf Channels| channels. 42 // Create a FIFO large enough to hold |fifoLength| frames of data of
43 // |numberOfChannels| channels.
43 AudioFIFO(unsigned numberOfChannels, size_t fifoLength); 44 AudioFIFO(unsigned numberOfChannels, size_t fifoLength);
44 45
45 // Push the data from the bus into the FIFO. 46 // Push the data from the bus into the FIFO.
46 void push(const AudioBus*); 47 void push(const AudioBus*);
47 48
48 // Consume |framesToConsume| frames of data from the FIFO and put them in |des tination|. The 49 // Consume |framesToConsume| frames of data from the FIFO and put them in
49 // corresponding frames are removed from the FIFO. 50 // |destination|. The corresponding frames are removed from the FIFO.
50 void consume(AudioBus* destination, size_t framesToConsume); 51 void consume(AudioBus* destination, size_t framesToConsume);
51 52
52 // Number of frames of data that are currently in the FIFO. 53 // Number of frames of data that are currently in the FIFO.
53 size_t framesInFifo() const { return m_framesInFifo; } 54 size_t framesInFifo() const { return m_framesInFifo; }
54 55
55 private: 56 private:
56 // Update the FIFO index by the step, with appropriate wrapping around the end point. 57 // Update the FIFO index by the step, with appropriate wrapping around the
58 // endpoint.
57 int updateIndex(int index, int step) { return (index + step) % m_fifoLength; } 59 int updateIndex(int index, int step) { return (index + step) % m_fifoLength; }
58 60
59 void findWrapLengths(size_t index, 61 void findWrapLengths(size_t index,
60 size_t providerSize, 62 size_t providerSize,
61 size_t& part1Length, 63 size_t& part1Length,
62 size_t& part2Length); 64 size_t& part2Length);
63 65
64 // The FIFO itself. In reality, the FIFO is a circular buffer. 66 // The FIFO itself. In reality, the FIFO is a circular buffer.
65 RefPtr<AudioBus> m_fifoAudioBus; 67 RefPtr<AudioBus> m_fifoAudioBus;
66 68
67 // The total available space in the FIFO. 69 // The total available space in the FIFO.
68 size_t m_fifoLength; 70 size_t m_fifoLength;
69 71
70 // The number of actual elements in the FIFO 72 // The number of actual elements in the FIFO
71 size_t m_framesInFifo; 73 size_t m_framesInFifo;
72 74
73 // Where to start reading from the FIFO. 75 // Where to start reading from the FIFO.
74 size_t m_readIndex; 76 size_t m_readIndex;
75 77
76 // Where to start writing to the FIFO. 78 // Where to start writing to the FIFO.
77 size_t m_writeIndex; 79 size_t m_writeIndex;
78 }; 80 };
79 81
80 } // namespace blink 82 } // namespace blink
81 83
82 #endif // AudioFIFO.h 84 #endif // AudioFIFO.h
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