89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
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/*
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* AUSidetone.h
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*
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* Created by richardp on 11/28/11.
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* Copyright 2011 Apple, Inc. All rights reserved.
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*
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* Does necessary translation between AE2 and CA AU speaker protection
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*/
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#ifndef __AUSidetone_h__
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#define __AUSidetone_h__
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#include <stdint.h>
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#include "AudioUnitProperties_AE2.h"
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#include "AUBase_AE2.h"
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struct AE2_IIRFilter;
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struct AE2_Volume;
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struct BiquadDescriptor;
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/**
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* AUSidetone implements the sidetone eq and gain.
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*
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* These values are hard-coded for now.
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*/
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class AUSidetone : public AUBase_AE2
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{
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public:
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static AUSidetone* Create_AUSidetone(uint32_t sampleRate, uint32_t numChannels, uint32_t sampleSize);
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virtual ~AUSidetone();
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virtual void Process(const void *inSourceP,
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void *inDestP,
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UInt32 inFramesToProcess);
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// for parameters
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virtual OSStatus SetParameter(AudioUnitParameterID paramID, AudioUnitParameterValue value);
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virtual AudioUnitParameterValue GetParameter(AudioUnitParameterID paramID);
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// for properties
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virtual OSStatus GetPropertyInfo(AudioUnitPropertyID inID, uint32_t& outDataSize, bool& outWritable);
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virtual OSStatus GetProperty(AudioUnitPropertyID inID, void* outData);
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virtual OSStatus SetProperty(AudioUnitPropertyID inID, const void* inData, uint32_t inDataSize);
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private:
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AUSidetone();
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bool InitWith(uint32_t sampleRate, uint32_t numChannels, uint32_t sampleSize);
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// some constants
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typedef AUBase_AE2 super;
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static const size_t kMaxNumBands = 5;
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static const float kDefaultSidetoneGain = -32.0;
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// Parameters for the AUNBandEQ unit
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// Note that the parameter IDs listed correspond to band 0 (zero) of the unit. The parameter IDs for
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// higher bands can be obtained by adding the zero-indexed band number to the corresponding band 0
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// parameter ID up to the number of bands minus one, where the number of bands is described by the
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// AUNBandEQ property kAUNBandEQProperty_NumberOfBands. For example, the parameter ID corresponding
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// to the filter type of band 4 would be kAUNBandEQParam_FilterType + 3.
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enum {
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kAUVolume_InDB = 500,
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// Global, Boolean, 0 or 1, 1
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kAUNBandEQParam_BypassBand = 1000,
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// Global, Indexed, 0->kNumAUNBandEQFilterTypes-1, 0
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kAUNBandEQParam_FilterType = 2000,
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// Global, Hz, 20->(SampleRate/2), 1000
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kAUNBandEQParam_Frequency = 3000,
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// Global, dB, -96->24, 0
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kAUNBandEQParam_Gain = 4000,
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// Global, octaves, 0.05->5.0, 0.5
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kAUNBandEQParam_Bandwidth = 5000
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};
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uint32_t mSampleRate;
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uint32_t mNumChannels;
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AE2_IIRFilter *mSidetoneEQ;
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AE2_Volume *mVolume;
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// to hold the coefficients
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uint32_t mNumberBands;
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BiquadDescriptor *mBiquadValues;
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float mVolumeInDB;
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bool mSidetoneEQBypass;
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};
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#endif // __AUSidetone_h__
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