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RingBuffer.h
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RingBuffer.h
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// Copyright (c) 2012 Alex Wiltschko
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
// TODO: Error throwing if things go wrong.
#import <AudioToolbox/AudioToolbox.h>
#import <Accelerate/Accelerate.h>
#define kMaxNumChannels 12
class RingBuffer {
public:
RingBuffer() {};
RingBuffer(SInt64 bufferLength, SInt64 numChannels);
~RingBuffer();
void AddNewSInt16AudioBuffer(const AudioBuffer aBuffer);
void AddNewSInt16Data(const SInt16 *newData, const SInt64 numFrames, const SInt64 whichChannel);
void AddNewFloatData(const float *newData, const SInt64 numFrames, const SInt64 whichChannel = 0);
void AddNewDoubleData(const double *newData, const SInt64 numFrames, const SInt64 whichChannel = 0);
void AddNewInterleavedFloatData(const float *newData, const SInt64 numFrames, const SInt64 numChannelsHere);
void FetchInterleavedData(float *outData, SInt64 numFrames, SInt64 numChannels);
void FetchFreshData(float *outData, SInt64 numFrames, SInt64 whichChannel, SInt64 stride);
float FetchFreshData2(float *outData, SInt64 numFrames, SInt64 whichChannel, SInt64 stride);
void FetchData(float *outData, SInt64 numFrames, SInt64 whichChannel, SInt64 stride);
SInt64 NumNewFrames(SInt64 lastReadFrame, int iChannel = 0);
SInt64 NumUnreadFrames(int iChannel = 0) {return mNumUnreadFrames[iChannel]; }
SInt64 WriteHeadPosition(int aChannel = 0) { return mLastWrittenIndex[aChannel]; }
SInt64 ReadHeadPosition(int aChannel = 0) { return mLastReadIndex[aChannel]; }
void SeekWriteHeadPosition(SInt64 offset, int iChannel=0);
void SeekReadHeadPosition(SInt64 offset, int iChannel=0);
SInt64 NumChannels() {return mNumChannels; }
void Clear();
// Analytics
float Mean(const SInt64 whichChannel = 0);
float Max(const SInt64 whichChannel = 0);
float Min(const SInt64 whichChannel = 0);
protected:
int64_t mLastWrittenIndex[kMaxNumChannels];
int64_t mLastReadIndex[kMaxNumChannels];
int64_t mNumUnreadFrames[kMaxNumChannels];
int64_t mSizeOfBuffer;
int64_t mNumChannels;
float **mData;
bool mAllocated;
private:
void UpdateFrameCount(int numFrames, int channel);
};