1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
File: CASpectralProcessor.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2014 Apple Inc. All Rights Reserved.
*/
#ifndef _SpectralProcesor_H_
#define _SpectralProcesor_H_
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
#include <CoreAudio/CoreAudioTypes.h>
#include <CoreFoundation/CoreFoundation.h>
#else
#include <CoreAudioTypes.h>
#include <CoreFoundation.h>
#endif
#include <Accelerate/Accelerate.h>
#include "CAAutoDisposer.h"
struct SpectralBufferList
{
UInt32 mNumberSpectra;
DSPSplitComplex mDSPSplitComplex[1];
};
class CASpectralProcessor
{
public:
CASpectralProcessor(UInt32 inFFTSize, UInt32 inHopSize, UInt32 inNumChannels, UInt32 inMaxFrames);
virtual ~CASpectralProcessor();
void Reset();
void Process(UInt32 inNumFrames, AudioBufferList* inInput, AudioBufferList* outOutput);
typedef void (*SpectralFunction)(SpectralBufferList* inSpectra, void* inUserData);
void SetSpectralFunction(SpectralFunction inFunction, void* inUserData);
UInt32 FFTSize() const { return mFFTSize; }
UInt32 MaxFrames() const { return mMaxFrames; }
UInt32 NumChannels() const { return mNumChannels; }
UInt32 HopSize() const { return mHopSize; }
Float32* Window() const { return mWindow; }
void HanningWindow(); // set up a hanning window
void SineWindow();
void GetFrequencies(Float32* freqs, Float32 sampleRate); // only for processed forward
void GetMagnitude(AudioBufferList* inCopy, Float32* min, Float32* max); // only for processed forward
virtual bool ProcessForwards(UInt32 inNumFrames, AudioBufferList* inInput);
bool ProcessBackwards(UInt32 inNumFrames, AudioBufferList* outOutput);
void PrintSpectralBufferList();
protected:
void CopyInput(UInt32 inNumFrames, AudioBufferList* inInput);
void CopyInputToFFT();
void DoWindowing();
void DoFwdFFT();
void DoInvFFT();
void OverlapAddOutput();
void CopyOutput(UInt32 inNumFrames, AudioBufferList* inOutput);
void ProcessSpectrum(UInt32 inFFTSize, SpectralBufferList* inSpectra);
UInt32 mFFTSize;
UInt32 mHopSize;
UInt32 mNumChannels;
UInt32 mMaxFrames;
UInt32 mLog2FFTSize;
UInt32 mFFTMask;
UInt32 mFFTByteSize;
UInt32 mIOBufSize;
UInt32 mIOMask;
UInt32 mInputSize;
UInt32 mInputPos;
UInt32 mOutputPos;
UInt32 mInFFTPos;
UInt32 mOutFFTPos;
FFTSetup mFFTSetup;
CAAutoFree<Float32> mWindow;
struct SpectralChannel
{
CAAutoFree<Float32> mInputBuf; // log2ceil(FFT size + max frames)
CAAutoFree<Float32> mOutputBuf; // log2ceil(FFT size + max frames)
CAAutoFree<Float32> mFFTBuf; // FFT size
CAAutoFree<Float32> mSplitFFTBuf; // FFT size
};
CAAutoArrayDelete<SpectralChannel> mChannels;
CAAutoFree<SpectralBufferList> mSpectralBufferList;
SpectralFunction mSpectralFunction;
void *mUserData;
};
#endif
|
