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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 |
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29 */ | 29 */ |
30 | 30 |
31 #ifndef AudioDSPKernel_h | 31 #ifndef AudioDSPKernel_h |
32 #define AudioDSPKernel_h | 32 #define AudioDSPKernel_h |
33 | 33 |
34 #include "platform/audio/AudioDSPKernelProcessor.h" | 34 #include "platform/audio/AudioDSPKernelProcessor.h" |
35 #include "wtf/Allocator.h" | 35 #include "wtf/Allocator.h" |
36 | 36 |
37 namespace blink { | 37 namespace blink { |
38 | 38 |
39 // AudioDSPKernel does the processing for one channel of an AudioDSPKernelProces
sor. | 39 // AudioDSPKernel does the processing for one channel of an |
| 40 // AudioDSPKernelProcessor. |
40 | 41 |
41 class PLATFORM_EXPORT AudioDSPKernel { | 42 class PLATFORM_EXPORT AudioDSPKernel { |
42 USING_FAST_MALLOC(AudioDSPKernel); | 43 USING_FAST_MALLOC(AudioDSPKernel); |
43 | 44 |
44 public: | 45 public: |
45 AudioDSPKernel(AudioDSPKernelProcessor* kernelProcessor) | 46 AudioDSPKernel(AudioDSPKernelProcessor* kernelProcessor) |
46 : m_kernelProcessor(kernelProcessor), | 47 : m_kernelProcessor(kernelProcessor), |
47 m_sampleRate(kernelProcessor->sampleRate()) {} | 48 m_sampleRate(kernelProcessor->sampleRate()) {} |
48 | 49 |
49 AudioDSPKernel(float sampleRate) | 50 AudioDSPKernel(float sampleRate) |
50 : m_kernelProcessor(nullptr), m_sampleRate(sampleRate) {} | 51 : m_kernelProcessor(nullptr), m_sampleRate(sampleRate) {} |
51 | 52 |
52 virtual ~AudioDSPKernel(); | 53 virtual ~AudioDSPKernel(); |
53 | 54 |
54 // Subclasses must override process() to do the processing and reset() to rese
t DSP state. | 55 // Subclasses must override process() to do the processing and reset() to |
| 56 // reset DSP state. |
55 virtual void process(const float* source, | 57 virtual void process(const float* source, |
56 float* destination, | 58 float* destination, |
57 size_t framesToProcess) = 0; | 59 size_t framesToProcess) = 0; |
58 virtual void reset() = 0; | 60 virtual void reset() = 0; |
59 | 61 |
60 float sampleRate() const { return m_sampleRate; } | 62 float sampleRate() const { return m_sampleRate; } |
61 double nyquist() const { return 0.5 * sampleRate(); } | 63 double nyquist() const { return 0.5 * sampleRate(); } |
62 | 64 |
63 AudioDSPKernelProcessor* processor() { return m_kernelProcessor; } | 65 AudioDSPKernelProcessor* processor() { return m_kernelProcessor; } |
64 const AudioDSPKernelProcessor* processor() const { return m_kernelProcessor; } | 66 const AudioDSPKernelProcessor* processor() const { return m_kernelProcessor; } |
65 | 67 |
66 virtual double tailTime() const = 0; | 68 virtual double tailTime() const = 0; |
67 virtual double latencyTime() const = 0; | 69 virtual double latencyTime() const = 0; |
68 | 70 |
69 protected: | 71 protected: |
70 // This raw pointer is safe because the AudioDSPKernelProcessor object is | 72 // This raw pointer is safe because the AudioDSPKernelProcessor object is |
71 // guaranteed to be kept alive while the AudioDSPKernel object is alive. | 73 // guaranteed to be kept alive while the AudioDSPKernel object is alive. |
72 AudioDSPKernelProcessor* m_kernelProcessor; | 74 AudioDSPKernelProcessor* m_kernelProcessor; |
73 float m_sampleRate; | 75 float m_sampleRate; |
74 }; | 76 }; |
75 | 77 |
76 } // namespace blink | 78 } // namespace blink |
77 | 79 |
78 #endif // AudioDSPKernel_h | 80 #endif // AudioDSPKernel_h |
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