| OLD | NEW |
| 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 20 matching lines...) Expand all Loading... |
| 31 #ifndef AudioProcessor_h | 31 #ifndef AudioProcessor_h |
| 32 #define AudioProcessor_h | 32 #define AudioProcessor_h |
| 33 | 33 |
| 34 #include "platform/PlatformExport.h" | 34 #include "platform/PlatformExport.h" |
| 35 #include "wtf/Allocator.h" | 35 #include "wtf/Allocator.h" |
| 36 | 36 |
| 37 namespace blink { | 37 namespace blink { |
| 38 | 38 |
| 39 class AudioBus; | 39 class AudioBus; |
| 40 | 40 |
| 41 // AudioProcessor is an abstract base class representing an audio signal process
ing object with a single input and a single output, | 41 // AudioProcessor is an abstract base class representing an audio signal |
| 42 // where the number of input channels equals the number of output channels. It
can be used as one part of a complex DSP algorithm, | 42 // processing object with a single input and a single output, where the number |
| 43 // or as the processor for a basic (one input - one output) AudioNode. | 43 // of input channels equals the number of output channels. It can be used as |
| 44 // one part of a complex DSP algorithm, or as the processor for a basic (one |
| 45 // input - one output) AudioNode. |
| 44 | 46 |
| 45 class PLATFORM_EXPORT AudioProcessor { | 47 class PLATFORM_EXPORT AudioProcessor { |
| 46 USING_FAST_MALLOC(AudioProcessor); | 48 USING_FAST_MALLOC(AudioProcessor); |
| 47 | 49 |
| 48 public: | 50 public: |
| 49 AudioProcessor(float sampleRate, unsigned numberOfChannels) | 51 AudioProcessor(float sampleRate, unsigned numberOfChannels) |
| 50 : m_initialized(false), | 52 : m_initialized(false), |
| 51 m_numberOfChannels(numberOfChannels), | 53 m_numberOfChannels(numberOfChannels), |
| 52 m_sampleRate(sampleRate) {} | 54 m_sampleRate(sampleRate) {} |
| 53 | 55 |
| 54 virtual ~AudioProcessor(); | 56 virtual ~AudioProcessor(); |
| 55 | 57 |
| 56 // Full initialization can be done here instead of in the constructor. | 58 // Full initialization can be done here instead of in the constructor. |
| 57 virtual void initialize() = 0; | 59 virtual void initialize() = 0; |
| 58 virtual void uninitialize() = 0; | 60 virtual void uninitialize() = 0; |
| 59 | 61 |
| 60 // Processes the source to destination bus. The number of channels must match
in source and destination. | 62 // Processes the source to destination bus. The number of channels must match |
| 63 // in source and destination. |
| 61 virtual void process(const AudioBus* source, | 64 virtual void process(const AudioBus* source, |
| 62 AudioBus* destination, | 65 AudioBus* destination, |
| 63 size_t framesToProcess) = 0; | 66 size_t framesToProcess) = 0; |
| 64 | 67 |
| 65 // Resets filter state | 68 // Resets filter state |
| 66 virtual void reset() = 0; | 69 virtual void reset() = 0; |
| 67 | 70 |
| 68 virtual void setNumberOfChannels(unsigned) = 0; | 71 virtual void setNumberOfChannels(unsigned) = 0; |
| 69 virtual unsigned numberOfChannels() const = 0; | 72 virtual unsigned numberOfChannels() const = 0; |
| 70 | 73 |
| 71 bool isInitialized() const { return m_initialized; } | 74 bool isInitialized() const { return m_initialized; } |
| 72 | 75 |
| 73 float sampleRate() const { return m_sampleRate; } | 76 float sampleRate() const { return m_sampleRate; } |
| 74 | 77 |
| 75 virtual double tailTime() const = 0; | 78 virtual double tailTime() const = 0; |
| 76 virtual double latencyTime() const = 0; | 79 virtual double latencyTime() const = 0; |
| 77 | 80 |
| 78 protected: | 81 protected: |
| 79 bool m_initialized; | 82 bool m_initialized; |
| 80 unsigned m_numberOfChannels; | 83 unsigned m_numberOfChannels; |
| 81 float m_sampleRate; | 84 float m_sampleRate; |
| 82 }; | 85 }; |
| 83 | 86 |
| 84 } // namespace blink | 87 } // namespace blink |
| 85 | 88 |
| 86 #endif // AudioProcessor_h | 89 #endif // AudioProcessor_h |
| OLD | NEW |