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/**********
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. (See <http://www.gnu.org/copyleft/lesser.html>.)
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
**********/
// "liveMedia"
// Copyright (c) 1996-2001 Live Networks, Inc. All rights reserved.
// MP3 internal implementation details
// Implementation
#include <stdlib.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "MP3Internals.hh"
// This is crufty old code that needs to be cleaned up #####
unsigned tabsel_123[2][3][16] = {
{ {32,32,64,96,128,160,192,224,256,288,320,352,384,416,448,448},
{32,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,384},
{32,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,320} },
{ {32,32,48,56,64,80,96,112,128,144,160,176,192,224,256,256},
{8,8,16,24,32,40,48,56,64,80,96,112,128,144,160,160},
{8,8,16,24,32,40,48,56,64,80,96,112,128,144,160,160} }
};
/* Note: tabsel_123[*][*][0 or 15] shouldn't occur; use dummy values there */
long freqs[7] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 };
static float ispow[8207];
static float aa_ca[8], aa_cs[8];
static float COS1[12][6];
static float win[4][36];
static float win1[4][36];
static float COS9[9];
static float COS6_1,COS6_2;
static float tfcos36[9];
static float tfcos12[3];
int longLimit[7][23];
int shortLimit[7][14];
struct bandInfoStruct {
int longIdx[23];
int longDiff[22];
int shortIdx[14];
int shortDiff[13];
};
struct bandInfoStruct bandInfo[7] = {
/* MPEG 1.0 */
{ {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576},
{4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158},
{0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3},
{4,4,4,4,6,8,10,12,14,18,22,30,56} } ,
{ {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576},
{4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192},
{0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3},
{4,4,4,4,6,6,10,12,14,16,20,26,66} } ,
{ {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} ,
{4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} ,
{0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} ,
{4,4,4,4,6,8,12,16,20,26,34,42,12} } ,
/* MPEG 2.0 */
{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
{0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} ,
{4,4,4,6,6,8,10,14,18,26,32,42,18 } } ,
{ {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576},
{6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } ,
{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} ,
{4,4,4,6,8,10,12,14,18,24,32,44,12 } } ,
{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 },
{0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3},
{4,4,4,6,8,10,12,14,18,24,30,40,18 } } ,
/* MPEG 2.5, wrong! table (it's just a copy of MPEG 2.0/44.1kHz) */
{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
{0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} ,
{4,4,4,6,6,8,10,14,18,26,32,42,18 } } ,
};
static int mapbuf0[7][152];
static int mapbuf1[7][156];
static int mapbuf2[7][44];
static int *map[7][3];
static int *mapend[7][3];
unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */
unsigned int i_slen2[256]; /* MPEG 2.