43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/**********************************************************************
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Audacity: A Digital Audio Editor
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InterpolateAudio.h
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Dominic Mazzoni
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*******************************************************************//*!
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\file Matrix.h
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\brief General routine to interpolate (or even extrapolate small amounts)
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audio when a few of the samples are bad. Works great for a few
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dozen bad samples, but not so well with hundreds. Uses the
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least-squares autoregression (LSAR) algorithm, as described in:
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Simon Godsill, Peter Rayner, and Olivier Cappe. Digital Audio Restoration.
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Berlin: Springer, 1998.
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This is the same work used by Gnome Wave Cleaner (GWC), however this
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implementation is original.
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*//*******************************************************************/
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#ifndef __AUDACITY_INTERPOLATE_AUDIO__
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#define __AUDACITY_INTERPOLATE_AUDIO__
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#include <cstddef>
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// See top of file for a description of the algorithm. Interpolates
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// the samples from buffer[firstBad] through buffer[firstBad+numBad-1],
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// ignoring whatever value was there previously, and replacing them with
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// values determined from the surrounding audio. Works best if the bad
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// samples are in the middle, with several times as much data on either
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// side (6x the number of bad samples on either side is great). However,
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// it will work with less data, and with the bad samples on one end or
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// the other.
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void AUDACITY_DLL_API InterpolateAudio(float *buffer, size_t len,
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size_t firstBad, size_t numBad);
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#endif // __AUDACITY_INTERPOLATE_AUDIO__
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