libs/rubberband/src/Resampler.h

   1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
   2
   3 /*
   4     Rubber Band
   5     An audio time-stretching and pitch-shifting library.
   6     Copyright 2007-2008 Chris Cannam.
   7
   8     This program is free software; you can redistribute it and/or
   9     modify it under the terms of the GNU General Public License as
  10     published by the Free Software Foundation; either version 2 of the
  11     License, or (at your option) any later version.  See the file
  12     COPYING included with this distribution for more information.
  13 */
  14
  15 #ifndef _RUBBERBAND_RESAMPLER_H_
  16 #define _RUBBERBAND_RESAMPLER_H_
  17
  18 #include <sys/types.h>
  19
  20 #include "sysutils.h"
  21
  22 namespace RubberBand {
  23
  24 class ResamplerImpl;
  25
  26 class Resampler
  27 {
  28 public:
  29     enum Quality { Best, FastestTolerable, Fastest };
  30     enum Exception { ImplementationError };
  31
  32     /**
  33      * Construct a resampler with the given quality level and channel
  34      * count.  maxBufferSize gives a bound on the maximum incount size
  35      * that may be passed to the resample function before the
  36      * resampler needs to reallocate its internal buffers.
  37      */
  38     Resampler(Quality quality, int channels, int maxBufferSize = 0,
  39               int debugLevel = 0);
  40     ~Resampler();
  41
  42     int resample(const float *const R__ *const R__ in,
  43                  float *const R__ *const R__ out,
  44                  int incount,
  45                  float ratio,
  46                  bool final = false);
  47
  48     void reset();
  49
  50 protected:
  51     ResamplerImpl *d;
  52     int m_method;
  53 };
  54
  55 }
  56
  57 #endif