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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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36 class AudioBus; | 36 class AudioBus; |
37 class AudioContext; | 37 class AudioContext; |
38 | 38 |
39 class AudioDestinationNode : public AudioNode, public AudioIOCallback { | 39 class AudioDestinationNode : public AudioNode, public AudioIOCallback { |
40 DEFINE_WRAPPERTYPEINFO(); | 40 DEFINE_WRAPPERTYPEINFO(); |
41 public: | 41 public: |
42 AudioDestinationNode(AudioContext*, float sampleRate); | 42 AudioDestinationNode(AudioContext*, float sampleRate); |
43 virtual ~AudioDestinationNode(); | 43 virtual ~AudioDestinationNode(); |
44 | 44 |
45 // AudioNode | 45 // AudioNode |
46 virtual void dispose() OVERRIDE; | 46 virtual void dispose() override; |
47 virtual void process(size_t) OVERRIDE FINAL { } // we're pulled by hardware
so this is never called | 47 virtual void process(size_t) override final { } // we're pulled by hardware
so this is never called |
48 | 48 |
49 // The audio hardware calls render() to get the next render quantum of audio
into destinationBus. | 49 // The audio hardware calls render() to get the next render quantum of audio
into destinationBus. |
50 // It will optionally give us local/live audio input in sourceBus (if it's n
ot 0). | 50 // It will optionally give us local/live audio input in sourceBus (if it's n
ot 0). |
51 virtual void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t nu
mberOfFrames) OVERRIDE FINAL; | 51 virtual void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t nu
mberOfFrames) override final; |
52 | 52 |
53 size_t currentSampleFrame() const { return m_currentSampleFrame; } | 53 size_t currentSampleFrame() const { return m_currentSampleFrame; } |
54 double currentTime() const { return currentSampleFrame() / static_cast<doubl
e>(sampleRate()); } | 54 double currentTime() const { return currentSampleFrame() / static_cast<doubl
e>(sampleRate()); } |
55 | 55 |
56 virtual unsigned long maxChannelCount() const { return 0; } | 56 virtual unsigned long maxChannelCount() const { return 0; } |
57 | 57 |
58 virtual void startRendering() = 0; | 58 virtual void startRendering() = 0; |
59 | 59 |
60 protected: | 60 protected: |
61 // LocalAudioInputProvider allows us to expose an AudioSourceProvider for lo
cal/live audio input. | 61 // LocalAudioInputProvider allows us to expose an AudioSourceProvider for lo
cal/live audio input. |
62 // If there is local/live audio input, we call set() with the audio input da
ta every render quantum. | 62 // If there is local/live audio input, we call set() with the audio input da
ta every render quantum. |
63 class LocalAudioInputProvider FINAL : public AudioSourceProvider { | 63 class LocalAudioInputProvider final : public AudioSourceProvider { |
64 public: | 64 public: |
65 LocalAudioInputProvider() | 65 LocalAudioInputProvider() |
66 : m_sourceBus(AudioBus::create(2, AudioNode::ProcessingSizeInFrames)
) // FIXME: handle non-stereo local input. | 66 : m_sourceBus(AudioBus::create(2, AudioNode::ProcessingSizeInFrames)
) // FIXME: handle non-stereo local input. |
67 { | 67 { |
68 } | 68 } |
69 | 69 |
70 void set(AudioBus* bus) | 70 void set(AudioBus* bus) |
71 { | 71 { |
72 if (bus) | 72 if (bus) |
73 m_sourceBus->copyFrom(*bus); | 73 m_sourceBus->copyFrom(*bus); |
74 } | 74 } |
75 | 75 |
76 // AudioSourceProvider. | 76 // AudioSourceProvider. |
77 virtual void provideInput(AudioBus* destinationBus, size_t numberOfFrame
s) OVERRIDE | 77 virtual void provideInput(AudioBus* destinationBus, size_t numberOfFrame
s) override |
78 { | 78 { |
79 bool isGood = destinationBus && destinationBus->length() == numberOf
Frames && m_sourceBus->length() == numberOfFrames; | 79 bool isGood = destinationBus && destinationBus->length() == numberOf
Frames && m_sourceBus->length() == numberOfFrames; |
80 ASSERT(isGood); | 80 ASSERT(isGood); |
81 if (isGood) | 81 if (isGood) |
82 destinationBus->copyFrom(*m_sourceBus); | 82 destinationBus->copyFrom(*m_sourceBus); |
83 } | 83 } |
84 | 84 |
85 private: | 85 private: |
86 RefPtr<AudioBus> m_sourceBus; | 86 RefPtr<AudioBus> m_sourceBus; |
87 }; | 87 }; |
88 | 88 |
89 virtual double tailTime() const OVERRIDE FINAL { return 0; } | 89 virtual double tailTime() const override final { return 0; } |
90 virtual double latencyTime() const OVERRIDE FINAL { return 0; } | 90 virtual double latencyTime() const override final { return 0; } |
91 | 91 |
92 // Counts the number of sample-frames processed by the destination. | 92 // Counts the number of sample-frames processed by the destination. |
93 size_t m_currentSampleFrame; | 93 size_t m_currentSampleFrame; |
94 | 94 |
95 LocalAudioInputProvider m_localAudioInputProvider; | 95 LocalAudioInputProvider m_localAudioInputProvider; |
96 }; | 96 }; |
97 | 97 |
98 } // namespace blink | 98 } // namespace blink |
99 | 99 |
100 #endif // AudioDestinationNode_h | 100 #endif // AudioDestinationNode_h |
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