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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 are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * 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 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
| (...skipping 26 matching lines...) Expand all Loading... |
| 37 #include "wtf/Vector.h" | 37 #include "wtf/Vector.h" |
| 38 #include <memory> | 38 #include <memory> |
| 39 | 39 |
| 40 namespace blink { | 40 namespace blink { |
| 41 | 41 |
| 42 class AudioBus; | 42 class AudioBus; |
| 43 class AudioDSPKernel; | 43 class AudioDSPKernel; |
| 44 class AudioProcessor; | 44 class AudioProcessor; |
| 45 | 45 |
| 46 // AudioDSPKernelProcessor processes one input -> one output (N channels each) | 46 // AudioDSPKernelProcessor processes one input -> one output (N channels each) |
| 47 // It uses one AudioDSPKernel object per channel to do the processing, thus ther
e is no cross-channel processing. | 47 // It uses one AudioDSPKernel object per channel to do the processing, thus |
| 48 // Despite this limitation it turns out to be a very common and useful type of p
rocessor. | 48 // there is no cross-channel processing. Despite this limitation it turns out |
| 49 // to be a very common and useful type of processor. |
| 49 | 50 |
| 50 class PLATFORM_EXPORT AudioDSPKernelProcessor : public AudioProcessor { | 51 class PLATFORM_EXPORT AudioDSPKernelProcessor : public AudioProcessor { |
| 51 public: | 52 public: |
| 52 // numberOfChannels may be later changed if object is not yet in an "initializ
ed" state | 53 // numberOfChannels may be later changed if object is not yet in an |
| 54 // "initialized" state |
| 53 AudioDSPKernelProcessor(float sampleRate, unsigned numberOfChannels); | 55 AudioDSPKernelProcessor(float sampleRate, unsigned numberOfChannels); |
| 54 | 56 |
| 55 // Subclasses create the appropriate type of processing kernel here. | 57 // Subclasses create the appropriate type of processing kernel here. |
| 56 // We'll call this to create a kernel for each channel. | 58 // We'll call this to create a kernel for each channel. |
| 57 virtual std::unique_ptr<AudioDSPKernel> createKernel() = 0; | 59 virtual std::unique_ptr<AudioDSPKernel> createKernel() = 0; |
| 58 | 60 |
| 59 // AudioProcessor methods | 61 // AudioProcessor methods |
| 60 void initialize() override; | 62 void initialize() override; |
| 61 void uninitialize() override; | 63 void uninitialize() override; |
| 62 void process(const AudioBus* source, | 64 void process(const AudioBus* source, |
| 63 AudioBus* destination, | 65 AudioBus* destination, |
| 64 size_t framesToProcess) override; | 66 size_t framesToProcess) override; |
| 65 void reset() override; | 67 void reset() override; |
| 66 void setNumberOfChannels(unsigned) override; | 68 void setNumberOfChannels(unsigned) override; |
| 67 unsigned numberOfChannels() const override { return m_numberOfChannels; } | 69 unsigned numberOfChannels() const override { return m_numberOfChannels; } |
| 68 | 70 |
| 69 double tailTime() const override; | 71 double tailTime() const override; |
| 70 double latencyTime() const override; | 72 double latencyTime() const override; |
| 71 | 73 |
| 72 protected: | 74 protected: |
| 73 Vector<std::unique_ptr<AudioDSPKernel>> m_kernels; | 75 Vector<std::unique_ptr<AudioDSPKernel>> m_kernels; |
| 74 mutable Mutex m_processLock; | 76 mutable Mutex m_processLock; |
| 75 bool m_hasJustReset; | 77 bool m_hasJustReset; |
| 76 }; | 78 }; |
| 77 | 79 |
| 78 } // namespace blink | 80 } // namespace blink |
| 79 | 81 |
| 80 #endif // AudioDSPKernelProcessor_h | 82 #endif // AudioDSPKernelProcessor_h |
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