040a61e1ed
Work back to a vDSP implementation, this time using overlap-save instead of overlap-add, also accumulating the results as complex values, only inversing them once at the end, and finally, replacing the FFT method with the newer DFT API. Signed-off-by: Christopher Snowhill <kode54@gmail.com>
47 lines
1,010 B
Objective-C
47 lines
1,010 B
Objective-C
//
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// HeadphoneFilter.h
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// CogAudio Framework
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//
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// Created by Christopher Snowhill on 1/24/22.
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//
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#ifndef HeadphoneFilter_h
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#define HeadphoneFilter_h
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#import <Accelerate/Accelerate.h>
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#import <Cocoa/Cocoa.h>
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@interface HeadphoneFilter : NSObject {
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vDSP_DFT_Setup dftSetupF;
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vDSP_DFT_Setup dftSetupB;
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size_t fftSize;
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size_t fftSizeOver2;
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size_t bufferSize;
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size_t paddedBufferSize;
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size_t channelCount;
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DSPSplitComplex signal_fft;
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DSPSplitComplex input_filtered_signal_per_channel[2];
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DSPSplitComplex input_filtered_signal_totals[2];
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DSPSplitComplex *impulse_responses;
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float **prevInputs;
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float *left_result;
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float *right_result;
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float *paddedSignal;
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}
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+ (BOOL)validateImpulseFile:(NSURL *)url;
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- (id)initWithImpulseFile:(NSURL *)url forSampleRate:(double)sampleRate withInputChannels:(size_t)channels withConfig:(uint32_t)config;
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- (void)process:(const float *)inBuffer sampleCount:(size_t)count toBuffer:(float *)outBuffer;
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- (void)reset;
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@end
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#endif /* HeadphoneFilter_h */
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