56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
/**********************************************************************
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Audacity: A Digital Audio Editor
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RingBuffer.h
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Dominic Mazzoni
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*******************************************************************/
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#ifndef __AUDACITY_RING_BUFFER__
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#define __AUDACITY_RING_BUFFER__
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#include "SampleFormat.h"
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#include <atomic>
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class RingBuffer final : public NonInterferingBase {
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public:
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RingBuffer(sampleFormat format, size_t size);
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~RingBuffer();
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//
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// For the writer only:
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//
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size_t AvailForPut();
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//! Does not apply dithering
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size_t Put(samplePtr buffer, sampleFormat format, size_t samples,
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// optional number of trailing zeroes
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size_t padding = 0);
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size_t Clear(sampleFormat format, size_t samples);
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//
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// For the reader only:
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//
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size_t AvailForGet();
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//! Does not apply dithering
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size_t Get(samplePtr buffer, sampleFormat format, size_t samples);
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size_t Discard(size_t samples);
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private:
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size_t Filled( size_t start, size_t end );
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size_t Free( size_t start, size_t end );
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// Align the two atomics to avoid false sharing
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NonInterfering< std::atomic<size_t> > mStart { 0 }, mEnd{ 0 };
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const size_t mBufferSize;
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sampleFormat mFormat;
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SampleBuffer mBuffer;
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};
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#endif /* __AUDACITY_RING_BUFFER__ */
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