diff options
Diffstat (limited to 'lib/soundtouch/InterpolateCubic.cpp')
| -rw-r--r-- | lib/soundtouch/InterpolateCubic.cpp | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/lib/soundtouch/InterpolateCubic.cpp b/lib/soundtouch/InterpolateCubic.cpp deleted file mode 100644 index fe49684817..0000000000 --- a/lib/soundtouch/InterpolateCubic.cpp +++ /dev/null @@ -1,196 +0,0 @@ -////////////////////////////////////////////////////////////////////////////////
-///
-/// Cubic interpolation routine.
-///
-/// Author : Copyright (c) Olli Parviainen
-/// Author e-mail : oparviai 'at' iki.fi
-/// SoundTouch WWW: http://www.surina.net/soundtouch
-///
-////////////////////////////////////////////////////////////////////////////////
-//
-// License :
-//
-// SoundTouch audio processing library
-// Copyright (c) Olli Parviainen
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License, or (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-//
-////////////////////////////////////////////////////////////////////////////////
-
-#include <stddef.h>
-#include <math.h>
-#include "InterpolateCubic.h"
-#include "STTypes.h"
-
-using namespace soundtouch;
-
-// cubic interpolation coefficients
-static const float _coeffs[]=
-{ -0.5f, 1.0f, -0.5f, 0.0f,
- 1.5f, -2.5f, 0.0f, 1.0f,
- -1.5f, 2.0f, 0.5f, 0.0f,
- 0.5f, -0.5f, 0.0f, 0.0f};
-
-
-InterpolateCubic::InterpolateCubic()
-{
- fract = 0;
-}
-
-
-void InterpolateCubic::resetRegisters()
-{
- fract = 0;
-}
-
-
-/// Transpose mono audio. Returns number of produced output samples, and
-/// updates "srcSamples" to amount of consumed source samples
-int InterpolateCubic::transposeMono(SAMPLETYPE *pdest,
- const SAMPLETYPE *psrc,
- int &srcSamples)
-{
- int i;
- int srcSampleEnd = srcSamples - 4;
- int srcCount = 0;
-
- i = 0;
- while (srcCount < srcSampleEnd)
- {
- float out;
- const float x3 = 1.0f;
- const float x2 = (float)fract; // x
- const float x1 = x2*x2; // x^2
- const float x0 = x1*x2; // x^3
- float y0, y1, y2, y3;
-
- assert(fract < 1.0);
-
- y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3;
- y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3;
- y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3;
- y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3;
-
- out = y0 * psrc[0] + y1 * psrc[1] + y2 * psrc[2] + y3 * psrc[3];
-
- pdest[i] = (SAMPLETYPE)out;
- i ++;
-
- // update position fraction
- fract += rate;
- // update whole positions
- int whole = (int)fract;
- fract -= whole;
- psrc += whole;
- srcCount += whole;
- }
- srcSamples = srcCount;
- return i;
-}
-
-
-/// Transpose stereo audio. Returns number of produced output samples, and
-/// updates "srcSamples" to amount of consumed source samples
-int InterpolateCubic::transposeStereo(SAMPLETYPE *pdest,
- const SAMPLETYPE *psrc,
- int &srcSamples)
-{
- int i;
- int srcSampleEnd = srcSamples - 4;
- int srcCount = 0;
-
- i = 0;
- while (srcCount < srcSampleEnd)
- {
- const float x3 = 1.0f;
- const float x2 = (float)fract; // x
- const float x1 = x2*x2; // x^2
- const float x0 = x1*x2; // x^3
- float y0, y1, y2, y3;
- float out0, out1;
-
- assert(fract < 1.0);
-
- y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3;
- y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3;
- y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3;
- y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3;
-
- out0 = y0 * psrc[0] + y1 * psrc[2] + y2 * psrc[4] + y3 * psrc[6];
- out1 = y0 * psrc[1] + y1 * psrc[3] + y2 * psrc[5] + y3 * psrc[7];
-
- pdest[2*i] = (SAMPLETYPE)out0;
- pdest[2*i+1] = (SAMPLETYPE)out1;
- i ++;
-
- // update position fraction
- fract += rate;
- // update whole positions
- int whole = (int)fract;
- fract -= whole;
- psrc += 2*whole;
- srcCount += whole;
- }
- srcSamples = srcCount;
- return i;
-}
-
-
-/// Transpose multi-channel audio. Returns number of produced output samples, and
-/// updates "srcSamples" to amount of consumed source samples
-int InterpolateCubic::transposeMulti(SAMPLETYPE *pdest,
- const SAMPLETYPE *psrc,
- int &srcSamples)
-{
- int i;
- int srcSampleEnd = srcSamples - 4;
- int srcCount = 0;
-
- i = 0;
- while (srcCount < srcSampleEnd)
- {
- const float x3 = 1.0f;
- const float x2 = (float)fract; // x
- const float x1 = x2*x2; // x^2
- const float x0 = x1*x2; // x^3
- float y0, y1, y2, y3;
-
- assert(fract < 1.0);
-
- y0 = _coeffs[0] * x0 + _coeffs[1] * x1 + _coeffs[2] * x2 + _coeffs[3] * x3;
- y1 = _coeffs[4] * x0 + _coeffs[5] * x1 + _coeffs[6] * x2 + _coeffs[7] * x3;
- y2 = _coeffs[8] * x0 + _coeffs[9] * x1 + _coeffs[10] * x2 + _coeffs[11] * x3;
- y3 = _coeffs[12] * x0 + _coeffs[13] * x1 + _coeffs[14] * x2 + _coeffs[15] * x3;
-
- for (int c = 0; c < numChannels; c ++)
- {
- float out;
- out = y0 * psrc[c] + y1 * psrc[c + numChannels] + y2 * psrc[c + 2 * numChannels] + y3 * psrc[c + 3 * numChannels];
- pdest[0] = (SAMPLETYPE)out;
- pdest ++;
- }
- i ++;
-
- // update position fraction
- fract += rate;
- // update whole positions
- int whole = (int)fract;
- fract -= whole;
- psrc += numChannels*whole;
- srcCount += whole;
- }
- srcSamples = srcCount;
- return i;
-}
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