/[svn]/linuxsampler/trunk/src/common/RTMath.cpp
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Contents of /linuxsampler/trunk/src/common/RTMath.cpp

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Revision 319 - (show annotations) (download)
Mon Dec 13 00:46:42 2004 UTC (14 years ago) by schoenebeck
File size: 2144 byte(s)
* introduced 'synthesis mode' to reduce the amount of code and conditionals
  for the current synthesis case in the main synthesis loop
* support for MMX and SSE(1) in the core synthesis algorithms (CPU feature
  detection at runtime, only x86 so far)

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20 * MA 02111-1307 USA *
21 ***************************************************************************/
22
23 #include "RTMath.h"
24
25 float RTMathBase::CentsToFreqTable[MAX_PITCH * 1200 * 2 + 1]; // +-1200 cents per octave
26 float* RTMathBase::pCentsToFreqTable(InitCentsToFreqTable());
27
28 /**
29 * Will automatically be called once to initialize the 'Cents to frequency
30 * ratio' table.
31 */
32 float* RTMathBase::InitCentsToFreqTable() {
33 float* pMiddleOfTable = &CentsToFreqTable[MAX_PITCH * 1200];
34 for (int i = -1200; i <= 1200; i++) {
35 pMiddleOfTable[i] = pow(TWELVEHUNDREDTH_ROOT_OF_TWO, i);
36 }
37 return pMiddleOfTable;
38 }

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