The Tor Browser: media/libsoundtouch/src/InterpolateLinear.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 ////////////////////////////////////////////////////////////////////////////////

     2 ///

     3 /// Linear interpolation routine.

     4 ///

     5 /// Author        : Copyright (c) Olli Parviainen

     6 /// Author e-mail : oparviai 'at' iki.fi

     7 /// SoundTouch WWW: http://www.surina.net/soundtouch

     8 ///

     9 ////////////////////////////////////////////////////////////////////////////////

    10 //

    11 // $Id: InterpolateLinear.h 179 2014-01-06 18:41:42Z oparviai $

    12 //

    13 ////////////////////////////////////////////////////////////////////////////////

    14 //

    15 // License :

    16 //

    17 //  SoundTouch audio processing library

    18 //  Copyright (c) Olli Parviainen

    19 //

    20 //  This library is free software; you can redistribute it and/or

    21 //  modify it under the terms of the GNU Lesser General Public

    22 //  License as published by the Free Software Foundation; either

    23 //  version 2.1 of the License, or (at your option) any later version.

    24 //

    25 //  This library is distributed in the hope that it will be useful,

    26 //  but WITHOUT ANY WARRANTY; without even the implied warranty of

    27 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    28 //  Lesser General Public License for more details.

    29 //

    30 //  You should have received a copy of the GNU Lesser General Public

    31 //  License along with this library; if not, write to the Free Software

    32 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    33 //

    34 ////////////////////////////////////////////////////////////////////////////////

    36 #ifndef _InterpolateLinear_H_

    37 #define _InterpolateLinear_H_

    39 #include "RateTransposer.h"

    40 #include "STTypes.h"

    42 namespace soundtouch

    43 {

    45 /// Linear transposer class that uses integer arithmetics

    46 class InterpolateLinearInteger : public TransposerBase

    47 {

    48 protected:

    49     int iFract;

    50     int iRate;

    52     virtual void resetRegisters();

    54     virtual int transposeMono(SAMPLETYPE *dest,

    55                        const SAMPLETYPE *src,

    56                        int &srcSamples);

    57     virtual int transposeStereo(SAMPLETYPE *dest,

    58                          const SAMPLETYPE *src,

    59                          int &srcSamples);

    60     virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);

    61 public:

    62     InterpolateLinearInteger();

    64     /// Sets new target rate. Normal rate = 1.0, smaller values represent slower

    65     /// rate, larger faster rates.

    66     virtual void setRate(float newRate);

    67 };

    70 /// Linear transposer class that uses floating point arithmetics

    71 class InterpolateLinearFloat : public TransposerBase

    72 {

    73 protected:

    74     float fract;

    76     virtual void resetRegisters();

    78     virtual int transposeMono(SAMPLETYPE *dest,

    79                        const SAMPLETYPE *src,

    80                        int &srcSamples);

    81     virtual int transposeStereo(SAMPLETYPE *dest,

    82                          const SAMPLETYPE *src,

    83                          int &srcSamples);

    84     virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);

    86 public:

    87     InterpolateLinearFloat();

    88 };

    90 }

    92 #endif

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