147 lines
5.0 KiB
C
147 lines
5.0 KiB
C
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/*
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File: CASpectralProcessor.h
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Abstract: Part of CoreAudio Utility Classes
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Version: 1.1
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
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terms, and your use, installation, modification or redistribution of
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this Apple software constitutes acceptance of these terms. If you do
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not agree with these terms, please do not use, install, modify or
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redistribute this Apple software.
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In consideration of your agreement to abide by the following terms, and
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subject to these terms, Apple grants you a personal, non-exclusive
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license, under Apple's copyrights in this original Apple software (the
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"Apple Software"), to use, reproduce, modify and redistribute the Apple
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Software, with or without modifications, in source and/or binary forms;
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provided that if you redistribute the Apple Software in its entirety and
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without modifications, you must retain this notice and the following
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text and disclaimers in all such redistributions of the Apple Software.
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Neither the name, trademarks, service marks or logos of Apple Inc. may
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be used to endorse or promote products derived from the Apple Software
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without specific prior written permission from Apple. Except as
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expressly stated in this notice, no other rights or licenses, express or
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implied, are granted by Apple herein, including but not limited to any
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patent rights that may be infringed by your derivative works or by other
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works in which the Apple Software may be incorporated.
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2014 Apple Inc. All Rights Reserved.
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*/
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#ifndef _SpectralProcesor_H_
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#define _SpectralProcesor_H_
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#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
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#include <CoreAudio/CoreAudioTypes.h>
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#include <CoreFoundation/CoreFoundation.h>
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#else
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#include <CoreAudioTypes.h>
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#include <CoreFoundation.h>
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#endif
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#include <Accelerate/Accelerate.h>
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#include "CAAutoDisposer.h"
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struct SpectralBufferList
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{
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UInt32 mNumberSpectra;
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DSPSplitComplex mDSPSplitComplex[1];
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};
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class CASpectralProcessor
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{
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public:
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CASpectralProcessor(UInt32 inFFTSize, UInt32 inHopSize, UInt32 inNumChannels, UInt32 inMaxFrames);
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virtual ~CASpectralProcessor();
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void Reset();
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void Process(UInt32 inNumFrames, AudioBufferList* inInput, AudioBufferList* outOutput);
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typedef void (*SpectralFunction)(SpectralBufferList* inSpectra, void* inUserData);
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void SetSpectralFunction(SpectralFunction inFunction, void* inUserData);
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UInt32 FFTSize() const { return mFFTSize; }
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UInt32 MaxFrames() const { return mMaxFrames; }
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UInt32 NumChannels() const { return mNumChannels; }
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UInt32 HopSize() const { return mHopSize; }
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Float32* Window() const { return mWindow; }
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void HanningWindow(); // set up a hanning window
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void SineWindow();
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void GetFrequencies(Float32* freqs, Float32 sampleRate); // only for processed forward
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void GetMagnitude(AudioBufferList* inCopy, Float32* min, Float32* max); // only for processed forward
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virtual bool ProcessForwards(UInt32 inNumFrames, AudioBufferList* inInput);
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bool ProcessBackwards(UInt32 inNumFrames, AudioBufferList* outOutput);
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void PrintSpectralBufferList();
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protected:
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void CopyInput(UInt32 inNumFrames, AudioBufferList* inInput);
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void CopyInputToFFT();
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void DoWindowing();
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void DoFwdFFT();
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void DoInvFFT();
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void OverlapAddOutput();
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void CopyOutput(UInt32 inNumFrames, AudioBufferList* inOutput);
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void ProcessSpectrum(UInt32 inFFTSize, SpectralBufferList* inSpectra);
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UInt32 mFFTSize;
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UInt32 mHopSize;
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UInt32 mNumChannels;
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UInt32 mMaxFrames;
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UInt32 mLog2FFTSize;
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UInt32 mFFTMask;
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UInt32 mFFTByteSize;
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UInt32 mIOBufSize;
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UInt32 mIOMask;
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UInt32 mInputSize;
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UInt32 mInputPos;
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UInt32 mOutputPos;
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UInt32 mInFFTPos;
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UInt32 mOutFFTPos;
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FFTSetup mFFTSetup;
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CAAutoFree<Float32> mWindow;
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struct SpectralChannel
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{
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CAAutoFree<Float32> mInputBuf; // log2ceil(FFT size + max frames)
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CAAutoFree<Float32> mOutputBuf; // log2ceil(FFT size + max frames)
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CAAutoFree<Float32> mFFTBuf; // FFT size
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CAAutoFree<Float32> mSplitFFTBuf; // FFT size
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};
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CAAutoArrayDelete<SpectralChannel> mChannels;
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CAAutoFree<SpectralBufferList> mSpectralBufferList;
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SpectralFunction mSpectralFunction;
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void *mUserData;
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};
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#endif
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