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https://github.com/cookiengineer/audacity
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318 lines
11 KiB
C++
318 lines
11 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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///
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/// MMX optimized routines. All MMX optimized functions have been gathered into
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/// this single source code file, regardless to their class or original source
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/// code file, in order to ease porting the library to other compiler and
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/// processor platforms.
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///
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/// The MMX-optimizations are programmed using MMX compiler intrinsics that
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/// are supported both by Microsoft Visual C++ and GCC compilers, so this file
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/// should compile with both toolsets.
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///
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/// NOTICE: If using Visual Studio 6.0, you'll need to install the "Visual C++
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/// 6.0 processor pack" update to support compiler intrinsic syntax. The update
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/// is available for download at Microsoft Developers Network, see here:
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/// http://msdn.microsoft.com/en-us/vstudio/aa718349.aspx
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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: 2012-11-08 20:53:01 +0200 (Thu, 08 Nov 2012) $
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// File revision : $Revision: 4 $
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//
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// $Id: mmx_optimized.cpp 160 2012-11-08 18:53:01Z 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 "STTypes.h"
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#ifdef SOUNDTOUCH_ALLOW_MMX
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// MMX routines available only with integer sample type
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using namespace soundtouch;
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//////////////////////////////////////////////////////////////////////////////
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//
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// implementation of MMX optimized functions of class 'TDStretchMMX'
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//
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//////////////////////////////////////////////////////////////////////////////
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#include "TDStretch.h"
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#include <mmintrin.h>
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#include <limits.h>
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#include <math.h>
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// Calculates cross correlation of two buffers
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double TDStretchMMX::calcCrossCorr(const short *pV1, const short *pV2) const
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{
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const __m64 *pVec1, *pVec2;
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__m64 shifter;
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__m64 accu, normaccu;
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long corr, norm;
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int i;
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pVec1 = (__m64*)pV1;
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pVec2 = (__m64*)pV2;
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shifter = _m_from_int(overlapDividerBits);
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normaccu = accu = _mm_setzero_si64();
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// Process 4 parallel sets of 2 * stereo samples or 4 * mono samples
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// during each round for improved CPU-level parallellization.
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for (i = 0; i < channels * overlapLength / 16; i ++)
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{
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__m64 temp, temp2;
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// dictionary of instructions:
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// _m_pmaddwd : 4*16bit multiply-add, resulting two 32bits = [a0*b0+a1*b1 ; a2*b2+a3*b3]
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// _mm_add_pi32 : 2*32bit add
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// _m_psrad : 32bit right-shift
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temp = _mm_add_pi32(_mm_madd_pi16(pVec1[0], pVec2[0]),
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_mm_madd_pi16(pVec1[1], pVec2[1]));
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temp2 = _mm_add_pi32(_mm_madd_pi16(pVec1[0], pVec1[0]),
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_mm_madd_pi16(pVec1[1], pVec1[1]));
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accu = _mm_add_pi32(accu, _mm_sra_pi32(temp, shifter));
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normaccu = _mm_add_pi32(normaccu, _mm_sra_pi32(temp2, shifter));
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temp = _mm_add_pi32(_mm_madd_pi16(pVec1[2], pVec2[2]),
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_mm_madd_pi16(pVec1[3], pVec2[3]));
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temp2 = _mm_add_pi32(_mm_madd_pi16(pVec1[2], pVec1[2]),
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_mm_madd_pi16(pVec1[3], pVec1[3]));
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accu = _mm_add_pi32(accu, _mm_sra_pi32(temp, shifter));
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normaccu = _mm_add_pi32(normaccu, _mm_sra_pi32(temp2, shifter));
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pVec1 += 4;
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pVec2 += 4;
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}
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// copy hi-dword of mm0 to lo-dword of mm1, then sum mmo+mm1
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// and finally store the result into the variable "corr"
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accu = _mm_add_pi32(accu, _mm_srli_si64(accu, 32));
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corr = _m_to_int(accu);
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normaccu = _mm_add_pi32(normaccu, _mm_srli_si64(normaccu, 32));
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norm = _m_to_int(normaccu);
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// Clear MMS state
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_m_empty();
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// Normalize result by dividing by sqrt(norm) - this step is easiest
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// done using floating point operation
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if (norm == 0) norm = 1; // to avoid div by zero
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return (double)corr / sqrt((double)norm);
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// Note: Warning about the missing EMMS instruction is harmless
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// as it'll be called elsewhere.
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}
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void TDStretchMMX::clearCrossCorrState()
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{
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// Clear MMS state
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_m_empty();
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//_asm EMMS;
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}
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// MMX-optimized version of the function overlapStereo
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void TDStretchMMX::overlapStereo(short *output, const short *input) const
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{
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const __m64 *pVinput, *pVMidBuf;
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__m64 *pVdest;
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__m64 mix1, mix2, adder, shifter;
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int i;
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pVinput = (const __m64*)input;
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pVMidBuf = (const __m64*)pMidBuffer;
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pVdest = (__m64*)output;
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// mix1 = mixer values for 1st stereo sample
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// mix1 = mixer values for 2nd stereo sample
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// adder = adder for updating mixer values after each round
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mix1 = _mm_set_pi16(0, overlapLength, 0, overlapLength);
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adder = _mm_set_pi16(1, -1, 1, -1);
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mix2 = _mm_add_pi16(mix1, adder);
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adder = _mm_add_pi16(adder, adder);
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// Overlaplength-division by shifter. "+1" is to account for "-1" deduced in
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// overlapDividerBits calculation earlier.
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shifter = _m_from_int(overlapDividerBits + 1);
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for (i = 0; i < overlapLength / 4; i ++)
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{
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__m64 temp1, temp2;
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// load & shuffle data so that input & mixbuffer data samples are paired
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temp1 = _mm_unpacklo_pi16(pVMidBuf[0], pVinput[0]); // = i0l m0l i0r m0r
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temp2 = _mm_unpackhi_pi16(pVMidBuf[0], pVinput[0]); // = i1l m1l i1r m1r
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// temp = (temp .* mix) >> shifter
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temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter);
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temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter);
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pVdest[0] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit
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// update mix += adder
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mix1 = _mm_add_pi16(mix1, adder);
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mix2 = _mm_add_pi16(mix2, adder);
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// --- second round begins here ---
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// load & shuffle data so that input & mixbuffer data samples are paired
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temp1 = _mm_unpacklo_pi16(pVMidBuf[1], pVinput[1]); // = i2l m2l i2r m2r
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temp2 = _mm_unpackhi_pi16(pVMidBuf[1], pVinput[1]); // = i3l m3l i3r m3r
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// temp = (temp .* mix) >> shifter
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temp1 = _mm_sra_pi32(_mm_madd_pi16(temp1, mix1), shifter);
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temp2 = _mm_sra_pi32(_mm_madd_pi16(temp2, mix2), shifter);
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pVdest[1] = _mm_packs_pi32(temp1, temp2); // pack 2*2*32bit => 4*16bit
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// update mix += adder
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mix1 = _mm_add_pi16(mix1, adder);
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mix2 = _mm_add_pi16(mix2, adder);
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pVinput += 2;
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pVMidBuf += 2;
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pVdest += 2;
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}
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_m_empty(); // clear MMS state
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// implementation of MMX optimized functions of class 'FIRFilter'
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//
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//////////////////////////////////////////////////////////////////////////////
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#include "FIRFilter.h"
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FIRFilterMMX::FIRFilterMMX() : FIRFilter()
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{
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filterCoeffsUnalign = NULL;
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}
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FIRFilterMMX::~FIRFilterMMX()
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{
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delete[] filterCoeffsUnalign;
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}
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// (overloaded) Calculates filter coefficients for MMX routine
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void FIRFilterMMX::setCoefficients(const short *coeffs, uint newLength, uint uResultDivFactor)
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{
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uint i;
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FIRFilter::setCoefficients(coeffs, newLength, uResultDivFactor);
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// Ensure that filter coeffs array is aligned to 16-byte boundary
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delete[] filterCoeffsUnalign;
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filterCoeffsUnalign = new short[2 * newLength + 8];
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filterCoeffsAlign = (short *)SOUNDTOUCH_ALIGN_POINTER_16(filterCoeffsUnalign);
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// rearrange the filter coefficients for mmx routines
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for (i = 0;i < length; i += 4)
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{
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filterCoeffsAlign[2 * i + 0] = coeffs[i + 0];
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filterCoeffsAlign[2 * i + 1] = coeffs[i + 2];
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filterCoeffsAlign[2 * i + 2] = coeffs[i + 0];
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filterCoeffsAlign[2 * i + 3] = coeffs[i + 2];
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filterCoeffsAlign[2 * i + 4] = coeffs[i + 1];
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filterCoeffsAlign[2 * i + 5] = coeffs[i + 3];
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filterCoeffsAlign[2 * i + 6] = coeffs[i + 1];
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filterCoeffsAlign[2 * i + 7] = coeffs[i + 3];
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}
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}
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// mmx-optimized version of the filter routine for stereo sound
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uint FIRFilterMMX::evaluateFilterStereo(short *dest, const short *src, uint numSamples) const
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{
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// Create stack copies of the needed member variables for asm routines :
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uint i, j;
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__m64 *pVdest = (__m64*)dest;
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if (length < 2) return 0;
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for (i = 0; i < (numSamples - length) / 2; i ++)
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{
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__m64 accu1;
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__m64 accu2;
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const __m64 *pVsrc = (const __m64*)src;
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const __m64 *pVfilter = (const __m64*)filterCoeffsAlign;
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accu1 = accu2 = _mm_setzero_si64();
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for (j = 0; j < lengthDiv8 * 2; j ++)
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{
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__m64 temp1, temp2;
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temp1 = _mm_unpacklo_pi16(pVsrc[0], pVsrc[1]); // = l2 l0 r2 r0
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temp2 = _mm_unpackhi_pi16(pVsrc[0], pVsrc[1]); // = l3 l1 r3 r1
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accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp1, pVfilter[0])); // += l2*f2+l0*f0 r2*f2+r0*f0
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accu1 = _mm_add_pi32(accu1, _mm_madd_pi16(temp2, pVfilter[1])); // += l3*f3+l1*f1 r3*f3+r1*f1
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temp1 = _mm_unpacklo_pi16(pVsrc[1], pVsrc[2]); // = l4 l2 r4 r2
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accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp2, pVfilter[0])); // += l3*f2+l1*f0 r3*f2+r1*f0
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accu2 = _mm_add_pi32(accu2, _mm_madd_pi16(temp1, pVfilter[1])); // += l4*f3+l2*f1 r4*f3+r2*f1
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// accu1 += l2*f2+l0*f0 r2*f2+r0*f0
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// += l3*f3+l1*f1 r3*f3+r1*f1
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// accu2 += l3*f2+l1*f0 r3*f2+r1*f0
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// l4*f3+l2*f1 r4*f3+r2*f1
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pVfilter += 2;
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pVsrc += 2;
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}
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// accu >>= resultDivFactor
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accu1 = _mm_srai_pi32(accu1, resultDivFactor);
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accu2 = _mm_srai_pi32(accu2, resultDivFactor);
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// pack 2*2*32bits => 4*16 bits
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pVdest[0] = _mm_packs_pi32(accu1, accu2);
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src += 4;
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pVdest ++;
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}
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_m_empty(); // clear emms state
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return (numSamples & 0xfffffffe) - length;
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}
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#endif // SOUNDTOUCH_ALLOW_MMX
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