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Fix include paths and compiling in Linux. Externals soundtouch is 1.7.1, while Ubuntu 12.10 is 1.6.x. Externals soundtouch is compiled with integer samples, while ubuntu is compiled with float samples. Float samples is probably the more common route. If you're going to use soundtouch, you should probably use SAMPLETYPE instead of explicitly choosing short. This probably breaks the windows build since its includes aren't setup.
This commit is contained in:
Ryan Houdek
259
Externals/soundtouch/FIRFilter.cpp
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259
Externals/soundtouch/FIRFilter.cpp
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////////////////////////////////////////////////////////////////////////////////
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///
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/// General FIR digital filter routines with MMX optimization.
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///
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/// Note : MMX optimized functions reside in a separate, platform-specific file,
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/// e.g. 'mmx_win.cpp' or 'mmx_gcc.cpp'
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///
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/// Author : Copyright (c) Olli Parviainen
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/// Author e-mail : oparviai 'at' iki.fi
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/// SoundTouch WWW: http://www.surina.net/soundtouch
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///
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////////////////////////////////////////////////////////////////////////////////
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//
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// Last changed : $Date: 2011-09-02 21:56:11 +0300 (Fri, 02 Sep 2011) $
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// File revision : $Revision: 4 $
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//
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// $Id: FIRFilter.cpp 131 2011-09-02 18:56:11Z oparviai $
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//
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////////////////////////////////////////////////////////////////////////////////
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//
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// License :
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//
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// SoundTouch audio processing library
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// Copyright (c) Olli Parviainen
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////
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#include <memory.h>
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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#include "FIRFilter.h"
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#include "cpu_detect.h"
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using namespace soundtouch;
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/*****************************************************************************
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*
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* Implementation of the class 'FIRFilter'
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*
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*****************************************************************************/
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FIRFilter::FIRFilter()
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{
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resultDivFactor = 0;
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resultDivider = 0;
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length = 0;
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lengthDiv8 = 0;
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filterCoeffs = NULL;
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}
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FIRFilter::~FIRFilter()
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{
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delete[] filterCoeffs;
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}
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// Usual C-version of the filter routine for stereo sound
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uint FIRFilter::evaluateFilterStereo(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples) const
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{
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uint i, j, end;
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LONG_SAMPLETYPE suml, sumr;
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#ifdef SOUNDTOUCH_FLOAT_SAMPLES
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// when using floating point samples, use a scaler instead of a divider
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// because division is much slower operation than multiplying.
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double dScaler = 1.0 / (double)resultDivider;
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#endif
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assert(length != 0);
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assert(src != NULL);
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assert(dest != NULL);
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assert(filterCoeffs != NULL);
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end = 2 * (numSamples - length);
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for (j = 0; j < end; j += 2)
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{
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const SAMPLETYPE *ptr;
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suml = sumr = 0;
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ptr = src + j;
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for (i = 0; i < length; i += 4)
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{
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// loop is unrolled by factor of 4 here for efficiency
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suml += ptr[2 * i + 0] * filterCoeffs[i + 0] +
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ptr[2 * i + 2] * filterCoeffs[i + 1] +
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ptr[2 * i + 4] * filterCoeffs[i + 2] +
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ptr[2 * i + 6] * filterCoeffs[i + 3];
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sumr += ptr[2 * i + 1] * filterCoeffs[i + 0] +
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ptr[2 * i + 3] * filterCoeffs[i + 1] +
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ptr[2 * i + 5] * filterCoeffs[i + 2] +
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ptr[2 * i + 7] * filterCoeffs[i + 3];
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}
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#ifdef SOUNDTOUCH_INTEGER_SAMPLES
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suml >>= resultDivFactor;
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sumr >>= resultDivFactor;
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// saturate to 16 bit integer limits
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suml = (suml < -32768) ? -32768 : (suml > 32767) ? 32767 : suml;
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// saturate to 16 bit integer limits
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sumr = (sumr < -32768) ? -32768 : (sumr > 32767) ? 32767 : sumr;
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#else
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suml *= dScaler;
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sumr *= dScaler;
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#endif // SOUNDTOUCH_INTEGER_SAMPLES
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dest[j] = (SAMPLETYPE)suml;
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dest[j + 1] = (SAMPLETYPE)sumr;
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}
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return numSamples - length;
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}
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// Usual C-version of the filter routine for mono sound
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uint FIRFilter::evaluateFilterMono(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples) const
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{
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uint i, j, end;
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LONG_SAMPLETYPE sum;
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#ifdef SOUNDTOUCH_FLOAT_SAMPLES
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// when using floating point samples, use a scaler instead of a divider
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// because division is much slower operation than multiplying.
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double dScaler = 1.0 / (double)resultDivider;
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#endif
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assert(length != 0);
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end = numSamples - length;
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for (j = 0; j < end; j ++)
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{
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sum = 0;
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for (i = 0; i < length; i += 4)
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{
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// loop is unrolled by factor of 4 here for efficiency
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sum += src[i + 0] * filterCoeffs[i + 0] +
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src[i + 1] * filterCoeffs[i + 1] +
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src[i + 2] * filterCoeffs[i + 2] +
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src[i + 3] * filterCoeffs[i + 3];
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}
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#ifdef SOUNDTOUCH_INTEGER_SAMPLES
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sum >>= resultDivFactor;
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// saturate to 16 bit integer limits
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sum = (sum < -32768) ? -32768 : (sum > 32767) ? 32767 : sum;
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#else
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sum *= dScaler;
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#endif // SOUNDTOUCH_INTEGER_SAMPLES
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dest[j] = (SAMPLETYPE)sum;
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src ++;
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}
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return end;
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}
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// Set filter coeffiecients and length.
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//
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// Throws an exception if filter length isn't divisible by 8
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void FIRFilter::setCoefficients(const SAMPLETYPE *coeffs, uint newLength, uint uResultDivFactor)
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{
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assert(newLength > 0);
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if (newLength % 8) ST_THROW_RT_ERROR("FIR filter length not divisible by 8");
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lengthDiv8 = newLength / 8;
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length = lengthDiv8 * 8;
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assert(length == newLength);
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resultDivFactor = uResultDivFactor;
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resultDivider = (SAMPLETYPE)::pow(2.0, (int)resultDivFactor);
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delete[] filterCoeffs;
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filterCoeffs = new SAMPLETYPE[length];
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memcpy(filterCoeffs, coeffs, length * sizeof(SAMPLETYPE));
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}
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uint FIRFilter::getLength() const
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{
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return length;
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}
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// Applies the filter to the given sequence of samples.
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//
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// Note : The amount of outputted samples is by value of 'filter_length'
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// smaller than the amount of input samples.
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uint FIRFilter::evaluate(SAMPLETYPE *dest, const SAMPLETYPE *src, uint numSamples, uint numChannels) const
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{
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assert(numChannels == 1 || numChannels == 2);
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assert(length > 0);
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assert(lengthDiv8 * 8 == length);
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if (numSamples < length) return 0;
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if (numChannels == 2)
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{
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return evaluateFilterStereo(dest, src, numSamples);
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} else {
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return evaluateFilterMono(dest, src, numSamples);
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}
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}
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// Operator 'new' is overloaded so that it automatically creates a suitable instance
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// depending on if we've a MMX-capable CPU available or not.
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void * FIRFilter::operator new(size_t s)
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{
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// Notice! don't use "new FIRFilter" directly, use "newInstance" to create a new instance instead!
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ST_THROW_RT_ERROR("Error in FIRFilter::new: Don't use 'new FIRFilter', use 'newInstance' member instead!");
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return newInstance();
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}
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FIRFilter * FIRFilter::newInstance()
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{
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uint uExtensions;
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uExtensions = detectCPUextensions();
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// Check if MMX/SSE instruction set extensions supported by CPU
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#ifdef SOUNDTOUCH_ALLOW_MMX
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// MMX routines available only with integer sample types
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if (uExtensions & SUPPORT_MMX)
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{
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return ::new FIRFilterMMX;
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}
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else
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#endif // SOUNDTOUCH_ALLOW_MMX
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#ifdef SOUNDTOUCH_ALLOW_SSE
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if (uExtensions & SUPPORT_SSE)
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{
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// SSE support
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return ::new FIRFilterSSE;
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}
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else
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#endif // SOUNDTOUCH_ALLOW_SSE
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{
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// ISA optimizations not supported, use plain C version
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return ::new FIRFilter;
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}
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}
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