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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 |
| (...skipping 25 matching lines...) Expand all Loading... |
| 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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