mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-31 14:13:50 +01:00
5e0efd1a25
Using LAME 3.10 Windows project files substantially changed from original, and included into audacity solution.
1970 lines
63 KiB
C
1970 lines
63 KiB
C
/*
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* layer3.c: Mpeg Layer-3 audio decoder
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*
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* Copyright (C) 1999-2010 The L.A.M.E. project
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*
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* Initially written by Michael Hipp, see also AUTHORS and README.
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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 Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* $Id: layer3.c,v 1.69 2017/08/20 20:06:57 robert Exp $ */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include "common.h"
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#include "huffman.h"
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#include "lame.h"
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#include "machine.h"
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#include "encoder.h"
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#include "lame-analysis.h"
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#include "decode_i386.h"
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#include "layer3.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif
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static int gd_are_hip_tables_layer3_initialized = 0;
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static real ispow[8207];
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static real aa_ca[8], aa_cs[8];
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static real COS1[12][6];
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static real win[4][36];
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static real win1[4][36];
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static real gainpow2[256 + 118 + 4];
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static real COS9[9];
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static real COS6_1, COS6_2;
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static real tfcos36[9];
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static real tfcos12[3];
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struct bandInfoStruct {
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short longIdx[23];
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short longDiff[22];
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short shortIdx[14];
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short shortDiff[13];
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};
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static int longLimit[9][23];
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static int shortLimit[9][14];
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/* *INDENT-OFF* */
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static const struct bandInfoStruct bandInfo[9] = {
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/* MPEG 1.0 */
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{ {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576},
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{4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158},
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{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},
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{4,4,4,4,6,8,10,12,14,18,22,30,56} } ,
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{ {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576},
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{4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192},
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{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},
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{4,4,4,4,6,6,10,12,14,16,20,26,66} } ,
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{ {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} ,
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{4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} ,
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{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} ,
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{4,4,4,4,6,8,12,16,20,26,34,42,12} } ,
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/* MPEG 2.0 */
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{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } ,
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{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} ,
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{4,4,4,6,6,8,10,14,18,26,32,42,18 } } ,
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/* docs: 332. mpg123: 330 */
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{ {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,332,394,464,540,576},
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{6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36 } ,
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{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} ,
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{4,4,4,6,8,10,12,14,18,24,32,44,12 } } ,
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{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576},
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 },
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{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},
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{4,4,4,6,8,10,12,14,18,24,30,40,18 } } ,
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/* MPEG 2.5 */
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{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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{4,4,4,6,8,10,12,14,18,24,30,40,18} },
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{ {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} ,
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{6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54},
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{0,12,24,36,54,78,108,144,186,240,312,402,522,576},
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{4,4,4,6,8,10,12,14,18,24,30,40,18} },
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{ {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576},
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{12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2},
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{0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576},
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{8,8,8,12,16,20,24,28,36,2,2,2,26} } ,
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};
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/* *INDENT-ON* */
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static int mapbuf0[9][152];
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static int mapbuf1[9][156];
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static int mapbuf2[9][44];
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static int *map[9][3];
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static int *mapend[9][3];
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static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */
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static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */
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static real tan1_1[16], tan2_1[16], tan1_2[16], tan2_2[16];
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static real pow1_1[2][16], pow2_1[2][16], pow1_2[2][16], pow2_2[2][16];
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static unsigned int
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get1bit(PMPSTR mp)
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{
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unsigned char rval;
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rval = *mp->wordpointer << mp->bitindex;
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mp->bitindex++;
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mp->wordpointer += (mp->bitindex >> 3);
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mp->bitindex &= 7;
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return rval >> 7;
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}
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static real
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get_gain(real const* gain_ptr, int idx, int* overflow)
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{
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static const real* const gainpow2_end_ptr = gainpow2 + (sizeof(gainpow2)/sizeof(gainpow2[0])) -1;
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real const * ptr = &gain_ptr[idx];
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if (&gain_ptr[idx] > gainpow2_end_ptr) {
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ptr = gainpow2_end_ptr;
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if (overflow) *overflow = 1;
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}
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return *ptr;
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}
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/*
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* init tables for layer-3
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*/
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void
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hip_init_tables_layer3(void)
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{
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int i, j, k;
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if (gd_are_hip_tables_layer3_initialized) {
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return;
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}
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gd_are_hip_tables_layer3_initialized = 1;
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for (i = -256; i < 118 + 4; i++)
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gainpow2[i + 256] = pow((double) 2.0, -0.25 * (double) (i + 210));
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for (i = 0; i < 8207; i++)
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ispow[i] = pow((double) i, (double) 4.0 / 3.0);
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for (i = 0; i < 8; i++) {
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static const double Ci[8] = { -0.6, -0.535, -0.33, -0.185, -0.095, -0.041, -0.0142, -0.0037 };
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double sq = sqrt(1.0 + Ci[i] * Ci[i]);
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aa_cs[i] = 1.0 / sq;
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aa_ca[i] = Ci[i] / sq;
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}
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for (i = 0; i < 18; i++) {
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win[0][i] = win[1][i] =
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0.5 * sin(M_PI / 72.0 * (double) (2 * (i + 0) + 1)) / cos(M_PI *
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(double) (2 * (i + 0) +
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19) / 72.0);
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win[0][i + 18] = win[3][i + 18] =
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0.5 * sin(M_PI / 72.0 * (double) (2 * (i + 18) + 1)) / cos(M_PI *
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(double) (2 * (i + 18) +
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19) / 72.0);
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}
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for (i = 0; i < 6; i++) {
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win[1][i + 18] = 0.5 / cos(M_PI * (double) (2 * (i + 18) + 19) / 72.0);
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win[3][i + 12] = 0.5 / cos(M_PI * (double) (2 * (i + 12) + 19) / 72.0);
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win[1][i + 24] =
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0.5 * sin(M_PI / 24.0 * (double) (2 * i + 13)) / cos(M_PI *
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(double) (2 * (i + 24) +
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19) / 72.0);
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win[1][i + 30] = win[3][i] = 0.0;
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win[3][i + 6] =
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0.5 * sin(M_PI / 24.0 * (double) (2 * i + 1)) / cos(M_PI * (double) (2 * (i + 6) + 19) /
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72.0);
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}
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for (i = 0; i < 9; i++)
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COS9[i] = cos(M_PI / 18.0 * (double) i);
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for (i = 0; i < 9; i++)
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tfcos36[i] = 0.5 / cos(M_PI * (double) (i * 2 + 1) / 36.0);
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for (i = 0; i < 3; i++)
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tfcos12[i] = 0.5 / cos(M_PI * (double) (i * 2 + 1) / 12.0);
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COS6_1 = cos(M_PI / 6.0 * (double) 1);
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COS6_2 = cos(M_PI / 6.0 * (double) 2);
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for (i = 0; i < 12; i++) {
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win[2][i] =
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0.5 * sin(M_PI / 24.0 * (double) (2 * i + 1)) / cos(M_PI * (double) (2 * i + 7) / 24.0);
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for (j = 0; j < 6; j++)
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COS1[i][j] = cos(M_PI / 24.0 * (double) ((2 * i + 7) * (2 * j + 1)));
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}
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for (j = 0; j < 4; j++) {
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static int const len[4] = { 36, 36, 12, 36 };
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for (i = 0; i < len[j]; i += 2)
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win1[j][i] = +win[j][i];
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for (i = 1; i < len[j]; i += 2)
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win1[j][i] = -win[j][i];
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}
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for (i = 0; i < 16; i++) {
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double t = tan((double) i * M_PI / 12.0);
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tan1_1[i] = t / (1.0 + t);
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tan2_1[i] = 1.0 / (1.0 + t);
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tan1_2[i] = M_SQRT2 * t / (1.0 + t);
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tan2_2[i] = M_SQRT2 / (1.0 + t);
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for (j = 0; j < 2; j++) {
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double base = pow(2.0, -0.25 * (j + 1.0));
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double p1 = 1.0, p2 = 1.0;
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if (i > 0) {
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if (i & 1)
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p1 = pow(base, (i + 1.0) * 0.5);
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else
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p2 = pow(base, i * 0.5);
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}
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pow1_1[j][i] = p1;
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pow2_1[j][i] = p2;
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pow1_2[j][i] = M_SQRT2 * p1;
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pow2_2[j][i] = M_SQRT2 * p2;
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}
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}
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for (j = 0; j < 9; j++) {
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struct bandInfoStruct const *bi = (struct bandInfoStruct const *) &bandInfo[j];
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int *mp;
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int cb, lwin;
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short const *bdf;
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int switch_idx = (j < 3) ? 8 : 6;
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mp = map[j][0] = mapbuf0[j];
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bdf = bi->longDiff;
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for (i = 0, cb = 0; cb < switch_idx; cb++, i += *bdf++) {
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*mp++ = (*bdf) >> 1;
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*mp++ = i;
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*mp++ = 3;
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*mp++ = cb;
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}
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bdf = bi->shortDiff + 3;
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for (cb = 3; cb < 13; cb++) {
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int l = (*bdf++) >> 1;
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for (lwin = 0; lwin < 3; lwin++) {
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*mp++ = l;
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*mp++ = i + lwin;
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*mp++ = lwin;
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*mp++ = cb;
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}
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i += 6 * l;
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}
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mapend[j][0] = mp;
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mp = map[j][1] = mapbuf1[j];
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bdf = bi->shortDiff + 0;
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for (i = 0, cb = 0; cb < 13; cb++) {
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int l = (*bdf++) >> 1;
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for (lwin = 0; lwin < 3; lwin++) {
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*mp++ = l;
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*mp++ = i + lwin;
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*mp++ = lwin;
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*mp++ = cb;
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}
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i += 6 * l;
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}
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mapend[j][1] = mp;
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mp = map[j][2] = mapbuf2[j];
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bdf = bi->longDiff;
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for (cb = 0; cb < 22; cb++) {
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*mp++ = (*bdf++) >> 1;
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*mp++ = cb;
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}
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mapend[j][2] = mp;
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}
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for (j = 0; j < 9; j++) {
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for (i = 0; i < 23; i++) {
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longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
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if (longLimit[j][i] > SBLIMIT)
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longLimit[j][i] = SBLIMIT;
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}
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for (i = 0; i < 14; i++) {
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shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
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if (shortLimit[j][i] > SBLIMIT)
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shortLimit[j][i] = SBLIMIT;
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}
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}
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for (i = 0; i < 5; i++) {
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for (j = 0; j < 6; j++) {
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for (k = 0; k < 6; k++) {
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int n = k + j * 6 + i * 36;
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i_slen2[n] = i | (j << 3) | (k << 6) | (3 << 12);
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}
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}
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}
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 4; j++) {
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for (k = 0; k < 4; k++) {
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int n = k + j * 4 + i * 16;
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i_slen2[n + 180] = i | (j << 3) | (k << 6) | (4 << 12);
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}
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}
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}
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 3; j++) {
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int n = j + i * 3;
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i_slen2[n + 244] = i | (j << 3) | (5 << 12);
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n_slen2[n + 500] = i | (j << 3) | (2 << 12) | (1 << 15);
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}
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}
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for (i = 0; i < 5; i++) {
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for (j = 0; j < 5; j++) {
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for (k = 0; k < 4; k++) {
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int l;
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for (l = 0; l < 4; l++) {
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int n = l + k * 4 + j * 16 + i * 80;
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n_slen2[n] = i | (j << 3) | (k << 6) | (l << 9) | (0 << 12);
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}
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}
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}
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}
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for (i = 0; i < 5; i++) {
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for (j = 0; j < 5; j++) {
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for (k = 0; k < 4; k++) {
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int n = k + j * 4 + i * 20;
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n_slen2[n + 400] = i | (j << 3) | (k << 6) | (1 << 12);
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}
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}
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}
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}
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/*
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* read additional side information
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*/
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static void
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III_get_side_info_1(PMPSTR mp, int stereo,
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int ms_stereo, long sfreq, int single)
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{
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int ch, gr;
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int powdiff = (single == 3) ? 4 : 0;
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mp->sideinfo.main_data_begin = getbits(mp, 9);
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if (stereo == 1)
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mp->sideinfo.private_bits = getbits_fast(mp, 5);
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else
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mp->sideinfo.private_bits = getbits_fast(mp, 3);
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for (ch = 0; ch < stereo; ch++) {
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mp->sideinfo.ch[ch].gr[0].scfsi = -1;
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mp->sideinfo.ch[ch].gr[1].scfsi = getbits_fast(mp, 4);
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}
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for (gr = 0; gr < 2; gr++) {
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for (ch = 0; ch < stereo; ch++) {
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struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[gr]);
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gr_infos->part2_3_length = getbits(mp, 12);
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gr_infos->big_values = getbits_fast(mp, 9);
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if (gr_infos->big_values > 288) {
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lame_report_fnc(mp->report_err, "big_values too large! %i\n", gr_infos->big_values);
|
|
gr_infos->big_values = 288;
|
|
}
|
|
{
|
|
unsigned int qss = getbits_fast(mp, 8);
|
|
gr_infos->pow2gain = gainpow2 + 256 - qss + powdiff;
|
|
if (mp->pinfo != NULL) {
|
|
mp->pinfo->qss[gr][ch] = qss;
|
|
}
|
|
}
|
|
if (ms_stereo)
|
|
gr_infos->pow2gain += 2;
|
|
gr_infos->scalefac_compress = getbits_fast(mp, 4);
|
|
/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
|
|
if (get1bit(mp)) {
|
|
int i;
|
|
gr_infos->block_type = getbits_fast(mp, 2);
|
|
gr_infos->mixed_block_flag = get1bit(mp);
|
|
gr_infos->table_select[0] = getbits_fast(mp, 5);
|
|
gr_infos->table_select[1] = getbits_fast(mp, 5);
|
|
|
|
|
|
/*
|
|
* table_select[2] not needed, because there is no region2,
|
|
* but to satisfy some verifications tools we set it either.
|
|
*/
|
|
gr_infos->table_select[2] = 0;
|
|
for (i = 0; i < 3; i++) {
|
|
unsigned int sbg = (getbits_fast(mp, 3) << 3);
|
|
gr_infos->full_gain[i] = gr_infos->pow2gain + sbg;
|
|
if (mp->pinfo != NULL)
|
|
mp->pinfo->sub_gain[gr][ch][i] = sbg / 8;
|
|
}
|
|
|
|
if (gr_infos->block_type == 0) {
|
|
lame_report_fnc(mp->report_err, "Blocktype == 0 and window-switching == 1 not allowed.\n");
|
|
/* error seems to be very good recoverable, so don't exit */
|
|
/* exit(1); */
|
|
}
|
|
/* region_count/start parameters are implicit in this case. */
|
|
gr_infos->region1start = 36 >> 1;
|
|
gr_infos->region2start = 576 >> 1;
|
|
}
|
|
else {
|
|
unsigned int i, r0c, r1c, region0index, region1index;
|
|
for (i = 0; i < 3; i++)
|
|
gr_infos->table_select[i] = getbits_fast(mp, 5);
|
|
r0c = getbits_fast(mp, 4);
|
|
r1c = getbits_fast(mp, 3);
|
|
region0index = r0c+1;
|
|
if (region0index > 22) {
|
|
lame_report_fnc(mp->report_err, "region0index=%d > 22\n", region0index);
|
|
region0index = 22;
|
|
}
|
|
region1index = r0c+1 + r1c+1;
|
|
if (region1index > 22) {
|
|
lame_report_fnc(mp->report_err, "region1index=%d > 22\n", region1index);
|
|
region1index = 22;
|
|
}
|
|
gr_infos->region1start = bandInfo[sfreq].longIdx[region0index] >> 1;
|
|
gr_infos->region2start = bandInfo[sfreq].longIdx[region1index] >> 1;
|
|
gr_infos->block_type = 0;
|
|
gr_infos->mixed_block_flag = 0;
|
|
}
|
|
gr_infos->preflag = get1bit(mp);
|
|
gr_infos->scalefac_scale = get1bit(mp);
|
|
gr_infos->count1table_select = get1bit(mp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Side Info for MPEG 2.0 / LSF
|
|
*/
|
|
static void
|
|
III_get_side_info_2(PMPSTR mp, int stereo, int ms_stereo, long sfreq, int single)
|
|
{
|
|
int ch;
|
|
int powdiff = (single == 3) ? 4 : 0;
|
|
|
|
mp->sideinfo.main_data_begin = getbits(mp, 8);
|
|
|
|
if (stereo == 1)
|
|
mp->sideinfo.private_bits = get1bit(mp);
|
|
else
|
|
mp->sideinfo.private_bits = getbits_fast(mp, 2);
|
|
|
|
for (ch = 0; ch < stereo; ch++) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[0]);
|
|
unsigned int qss;
|
|
|
|
gr_infos->part2_3_length = getbits(mp, 12);
|
|
gr_infos->big_values = getbits_fast(mp, 9);
|
|
if (gr_infos->big_values > 288) {
|
|
lame_report_fnc(mp->report_err, "big_values too large! %i\n", gr_infos->big_values);
|
|
gr_infos->big_values = 288;
|
|
}
|
|
qss = getbits_fast(mp, 8);
|
|
gr_infos->pow2gain = gainpow2 + 256 - qss + powdiff;
|
|
if (mp->pinfo != NULL) {
|
|
mp->pinfo->qss[0][ch] = qss;
|
|
}
|
|
|
|
|
|
if (ms_stereo)
|
|
gr_infos->pow2gain += 2;
|
|
gr_infos->scalefac_compress = getbits(mp, 9);
|
|
/* window-switching flag == 1 for block_Type != 0 .. and block-type == 0 -> win-sw-flag = 0 */
|
|
if (get1bit(mp)) {
|
|
int i;
|
|
gr_infos->block_type = getbits_fast(mp, 2);
|
|
gr_infos->mixed_block_flag = get1bit(mp);
|
|
gr_infos->table_select[0] = getbits_fast(mp, 5);
|
|
gr_infos->table_select[1] = getbits_fast(mp, 5);
|
|
/*
|
|
* table_select[2] not needed, because there is no region2,
|
|
* but to satisfy some verifications tools we set it either.
|
|
*/
|
|
gr_infos->table_select[2] = 0;
|
|
for (i = 0; i < 3; i++) {
|
|
unsigned int sbg = (getbits_fast(mp, 3) << 3);
|
|
gr_infos->full_gain[i] = gr_infos->pow2gain + sbg;
|
|
if (mp->pinfo != NULL)
|
|
mp->pinfo->sub_gain[0][ch][i] = sbg / 8;
|
|
|
|
}
|
|
|
|
if (gr_infos->block_type == 0) {
|
|
lame_report_fnc(mp->report_err, "Blocktype == 0 and window-switching == 1 not allowed.\n");
|
|
/* error seems to be very good recoverable, so don't exit */
|
|
/* exit(1); */
|
|
}
|
|
/* region_count/start parameters are implicit in this case. */
|
|
if (gr_infos->block_type == 2) {
|
|
if (gr_infos->mixed_block_flag == 0)
|
|
gr_infos->region1start = 36 >> 1;
|
|
else
|
|
gr_infos->region1start = 48 >> 1;
|
|
}
|
|
else
|
|
gr_infos->region1start = 54 >> 1;
|
|
if (sfreq == 8)
|
|
gr_infos->region1start *= 2;
|
|
gr_infos->region2start = 576 >> 1;
|
|
}
|
|
else {
|
|
unsigned int i, r0c, r1c, region0index, region1index;
|
|
for (i = 0; i < 3; i++)
|
|
gr_infos->table_select[i] = getbits_fast(mp, 5);
|
|
r0c = getbits_fast(mp, 4);
|
|
r1c = getbits_fast(mp, 3);
|
|
region0index = r0c+1;
|
|
if (region0index > 22) {
|
|
lame_report_fnc(mp->report_err, "region0index=%d > 22\n", region0index);
|
|
region0index = 22;
|
|
}
|
|
region1index = r0c+1 + r1c+1;
|
|
if (region1index > 22) {
|
|
lame_report_fnc(mp->report_err, "region1index=%d > 22\n", region1index);
|
|
region1index = 22;
|
|
}
|
|
gr_infos->region1start = bandInfo[sfreq].longIdx[region0index] >> 1;
|
|
gr_infos->region2start = bandInfo[sfreq].longIdx[region1index] >> 1;
|
|
gr_infos->block_type = 0;
|
|
gr_infos->mixed_block_flag = 0;
|
|
}
|
|
gr_infos->scalefac_scale = get1bit(mp);
|
|
gr_infos->count1table_select = get1bit(mp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* read scalefactors
|
|
*/
|
|
|
|
static int
|
|
III_get_scale_factors_1(PMPSTR mp, int *scf, struct gr_info_s *gr_infos)
|
|
{
|
|
static const unsigned char slen[2][16] = {
|
|
{0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4},
|
|
{0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3}
|
|
};
|
|
int numbits;
|
|
int num0 = slen[0][gr_infos->scalefac_compress];
|
|
int num1 = slen[1][gr_infos->scalefac_compress];
|
|
|
|
if (gr_infos->block_type == 2) {
|
|
int i = 18;
|
|
numbits = (num0 + num1) * 18;
|
|
|
|
if (gr_infos->mixed_block_flag) {
|
|
for (i = 8; i; i--)
|
|
*scf++ = getbits_fast(mp, num0);
|
|
i = 9;
|
|
numbits -= num0; /* num0 * 17 + num1 * 18 */
|
|
}
|
|
|
|
for (; i; i--)
|
|
*scf++ = getbits_fast(mp, num0);
|
|
for (i = 18; i; i--)
|
|
*scf++ = getbits_fast(mp, num1);
|
|
*scf++ = 0;
|
|
*scf++ = 0;
|
|
*scf++ = 0; /* short[13][0..2] = 0 */
|
|
}
|
|
else {
|
|
int i;
|
|
int scfsi = gr_infos->scfsi;
|
|
|
|
if (scfsi < 0) { /* scfsi < 0 => granule == 0 */
|
|
for (i = 11; i; i--)
|
|
*scf++ = getbits_fast(mp, num0);
|
|
for (i = 10; i; i--)
|
|
*scf++ = getbits_fast(mp, num1);
|
|
numbits = (num0 + num1) * 10 + num0;
|
|
}
|
|
else {
|
|
numbits = 0;
|
|
if (!(scfsi & 0x8)) {
|
|
for (i = 6; i; i--)
|
|
*scf++ = getbits_fast(mp, num0);
|
|
numbits += num0 * 6;
|
|
}
|
|
else {
|
|
scf += 6;
|
|
}
|
|
|
|
if (!(scfsi & 0x4)) {
|
|
for (i = 5; i; i--)
|
|
*scf++ = getbits_fast(mp, num0);
|
|
numbits += num0 * 5;
|
|
}
|
|
else {
|
|
scf += 5;
|
|
}
|
|
|
|
if (!(scfsi & 0x2)) {
|
|
for (i = 5; i; i--)
|
|
*scf++ = getbits_fast(mp, num1);
|
|
numbits += num1 * 5;
|
|
}
|
|
else {
|
|
scf += 5;
|
|
}
|
|
|
|
if (!(scfsi & 0x1)) {
|
|
for (i = 5; i; i--)
|
|
*scf++ = getbits_fast(mp, num1);
|
|
numbits += num1 * 5;
|
|
}
|
|
else {
|
|
scf += 5;
|
|
}
|
|
}
|
|
|
|
*scf++ = 0; /* no l[21] in original sources */
|
|
}
|
|
return numbits;
|
|
}
|
|
|
|
|
|
static int
|
|
III_get_scale_factors_2(PMPSTR mp, int *scf, struct gr_info_s *gr_infos, int i_stereo)
|
|
{
|
|
unsigned char const *pnt;
|
|
int i, j;
|
|
unsigned int slen;
|
|
int n = 0;
|
|
int numbits = 0;
|
|
|
|
/* *INDENT-OFF* */
|
|
static const unsigned char stab[3][6][4] = {
|
|
{ { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} ,
|
|
{ 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } ,
|
|
{ { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} ,
|
|
{12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } ,
|
|
{ { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} ,
|
|
{ 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } };
|
|
/* *INDENT-ON* */
|
|
|
|
if (i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */
|
|
slen = i_slen2[gr_infos->scalefac_compress >> 1];
|
|
else
|
|
slen = n_slen2[gr_infos->scalefac_compress];
|
|
|
|
gr_infos->preflag = (slen >> 15) & 0x1;
|
|
|
|
n = 0;
|
|
if (gr_infos->block_type == 2) {
|
|
n++;
|
|
if (gr_infos->mixed_block_flag)
|
|
n++;
|
|
}
|
|
|
|
pnt = (unsigned char const *) stab[n][(slen >> 12) & 0x7];
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
int num = slen & 0x7;
|
|
slen >>= 3;
|
|
if (num) {
|
|
for (j = 0; j < (int) (pnt[i]); j++)
|
|
*scf++ = getbits_fast(mp, num);
|
|
numbits += pnt[i] * num;
|
|
}
|
|
else {
|
|
for (j = 0; j < (int) (pnt[i]); j++)
|
|
*scf++ = 0;
|
|
}
|
|
}
|
|
|
|
n = (n << 1) + 1;
|
|
for (i = 0; i < n; i++)
|
|
*scf++ = 0;
|
|
|
|
return numbits;
|
|
}
|
|
|
|
/* *INDENT-OFF* */
|
|
static const int pretab1 [22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}; /* char enough ? */
|
|
static const int pretab2 [22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
|
|
/* *INDENT-ON* */
|
|
|
|
/*
|
|
* don't forget to apply the same changes to III_dequantize_sample_ms() !!!
|
|
*/
|
|
static int
|
|
III_dequantize_sample(PMPSTR mp, real xr[SBLIMIT][SSLIMIT], int *scf,
|
|
struct gr_info_s *gr_infos, int sfreq, int part2bits)
|
|
{
|
|
int shift = 1 + gr_infos->scalefac_scale;
|
|
real *xrpnt = (real *) xr, xr_value=0;
|
|
int l[3], l3;
|
|
int part2remain = gr_infos->part2_3_length - part2bits;
|
|
int *me;
|
|
real const * const xr_endptr = &xr[SBLIMIT-1][SSLIMIT-1];
|
|
|
|
int isbug = 0;
|
|
int bobug = 0;
|
|
int bobug_sb = 0, bobug_l3=0;
|
|
#define BUFFER_OVERFLOW_BUG() if(!bobug){bobug=1;bobug_sb=cb;bobug_l3=l3;}else
|
|
|
|
/* lame_report_fnc(mp->report_dbg,"part2remain = %d, gr_infos->part2_3_length = %d, part2bits = %d\n",
|
|
part2remain, gr_infos->part2_3_length, part2bits); */
|
|
|
|
{
|
|
int i;
|
|
|
|
for (i = (&xr[SBLIMIT][0] - xrpnt) >> 1; i > 0; i--) {
|
|
*xrpnt++ = 0.0;
|
|
*xrpnt++ = 0.0;
|
|
}
|
|
|
|
xrpnt = (real *) xr;
|
|
}
|
|
|
|
{
|
|
int bv = gr_infos->big_values;
|
|
int region1 = gr_infos->region1start;
|
|
int region2 = gr_infos->region2start;
|
|
|
|
l3 = ((576 >> 1) - bv) >> 1;
|
|
/*
|
|
* we may lose the 'odd' bit here !!
|
|
* check this later again
|
|
*/
|
|
if (bv <= region1) {
|
|
l[0] = bv;
|
|
l[1] = 0;
|
|
l[2] = 0;
|
|
}
|
|
else {
|
|
l[0] = region1;
|
|
if (bv <= region2) {
|
|
l[1] = bv - l[0];
|
|
l[2] = 0;
|
|
}
|
|
else {
|
|
l[1] = region2 - l[0];
|
|
l[2] = bv - region2;
|
|
}
|
|
}
|
|
}
|
|
/* MDH crash fix */
|
|
{
|
|
int i;
|
|
for (i = 0; i < 3; i++) {
|
|
if (l[i] < 0) {
|
|
lame_report_fnc(mp->report_err, "hip: Bogus region length (%d)\n", l[i]);
|
|
l[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
/* end MDH crash fix */
|
|
|
|
if (gr_infos->block_type == 2) {
|
|
/*
|
|
* decoding with short or mixed mode BandIndex table
|
|
*/
|
|
int i, max[4];
|
|
int step = 0, lwin = 0, cb = 0;
|
|
real v = 0.0;
|
|
int *m, mc;
|
|
|
|
if (gr_infos->mixed_block_flag) {
|
|
max[3] = -1;
|
|
max[0] = max[1] = max[2] = 2;
|
|
m = map[sfreq][0];
|
|
me = mapend[sfreq][0];
|
|
}
|
|
else {
|
|
max[0] = max[1] = max[2] = max[3] = -1;
|
|
/* max[3] not really needed in this case */
|
|
m = map[sfreq][1];
|
|
me = mapend[sfreq][1];
|
|
}
|
|
|
|
mc = 0;
|
|
for (i = 0; i < 2; i++) {
|
|
int lp = l[i];
|
|
struct newhuff const *h = (struct newhuff const *) (ht + gr_infos->table_select[i]);
|
|
for (; lp; lp--, mc--) {
|
|
int x, y;
|
|
if ((!mc)) {
|
|
mc = *m++;
|
|
xrpnt = ((real *) xr) + (*m++);
|
|
lwin = *m++;
|
|
cb = *m++;
|
|
if (lwin == 3) {
|
|
v = get_gain(gr_infos->pow2gain, (*scf++) << shift, &isbug);
|
|
step = 1;
|
|
}
|
|
else {
|
|
v = get_gain(gr_infos->full_gain[lwin], (*scf++) << shift, &isbug);
|
|
step = 3;
|
|
}
|
|
}
|
|
{
|
|
short const *val = (short const *) h->table;
|
|
while ((y = *val++) < 0) {
|
|
if (get1bit(mp))
|
|
val -= y;
|
|
part2remain--;
|
|
}
|
|
x = y >> 4;
|
|
y &= 0xf;
|
|
}
|
|
if (x == 15) {
|
|
max[lwin] = cb;
|
|
part2remain -= h->linbits + 1;
|
|
x += getbits(mp, (int) h->linbits);
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[x] * v;
|
|
else
|
|
xr_value = ispow[x] * v;
|
|
}
|
|
else if (x) {
|
|
max[lwin] = cb;
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[x] * v;
|
|
else
|
|
xr_value = ispow[x] * v;
|
|
part2remain--;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
xrpnt += step;
|
|
if (y == 15) {
|
|
max[lwin] = cb;
|
|
part2remain -= h->linbits + 1;
|
|
y += getbits(mp, (int) h->linbits);
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[y] * v;
|
|
else
|
|
xr_value = ispow[y] * v;
|
|
}
|
|
else if (y) {
|
|
max[lwin] = cb;
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[y] * v;
|
|
else
|
|
xr_value = ispow[y] * v;
|
|
part2remain--;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
xrpnt += step;
|
|
}
|
|
}
|
|
for (; (l3 > 0) && (part2remain > 0); l3--) {
|
|
struct newhuff const *h = (struct newhuff const *) (htc + gr_infos->count1table_select);
|
|
short const *val = (short const *) h->table;
|
|
short a;
|
|
|
|
while ((a = *val++) < 0) {
|
|
part2remain--;
|
|
if (part2remain < 0) {
|
|
part2remain++;
|
|
a = 0;
|
|
break;
|
|
}
|
|
if (get1bit(mp))
|
|
val -= a;
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
if (!(i & 1)) {
|
|
if (!mc) {
|
|
mc = *m++;
|
|
xrpnt = ((real *) xr) + (*m++);
|
|
lwin = *m++;
|
|
cb = *m++;
|
|
if (lwin == 3) {
|
|
v = get_gain(gr_infos->pow2gain, (*scf++) << shift, &isbug);
|
|
step = 1;
|
|
}
|
|
else {
|
|
v = get_gain(gr_infos->full_gain[lwin], (*scf++) << shift, &isbug);
|
|
step = 3;
|
|
}
|
|
}
|
|
mc--;
|
|
}
|
|
if ((a & (0x8 >> i))) {
|
|
max[lwin] = cb;
|
|
part2remain--;
|
|
if (part2remain < 0) {
|
|
part2remain++;
|
|
break;
|
|
}
|
|
if (get1bit(mp))
|
|
xr_value = -v;
|
|
else
|
|
xr_value = v;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
xrpnt += step;
|
|
}
|
|
}
|
|
while (m < me) {
|
|
if (!mc) {
|
|
mc = *m++;
|
|
xrpnt = ((real *) xr) + *m++;
|
|
if ((*m++) == 3)
|
|
step = 1;
|
|
else
|
|
step = 3;
|
|
m++; /* cb */
|
|
}
|
|
mc--;
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt = 0.0;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
xrpnt += step;
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt = 0.0;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
xrpnt += step;
|
|
/* we could add a little opt. here:
|
|
* if we finished a band for window 3 or a long band
|
|
* further bands could copied in a simple loop without a
|
|
* special 'map' decoding
|
|
*/
|
|
}
|
|
|
|
gr_infos->maxband[0] = max[0] + 1;
|
|
gr_infos->maxband[1] = max[1] + 1;
|
|
gr_infos->maxband[2] = max[2] + 1;
|
|
gr_infos->maxbandl = max[3] + 1;
|
|
|
|
{
|
|
int rmax = max[0] > max[1] ? max[0] : max[1];
|
|
rmax = (rmax > max[2] ? rmax : max[2]) + 1;
|
|
gr_infos->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3] + 1];
|
|
}
|
|
|
|
}
|
|
else {
|
|
/*
|
|
* decoding with 'long' BandIndex table (block_type != 2)
|
|
*/
|
|
int const *pretab = (int const *) (gr_infos->preflag ? pretab1 : pretab2);
|
|
int i, max = -1;
|
|
int cb = 0;
|
|
int *m = map[sfreq][2];
|
|
real v = 0.0;
|
|
int mc = 0;
|
|
|
|
/*
|
|
* long hash table values
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
int lp = l[i];
|
|
struct newhuff const *h = (struct newhuff const *) (ht + gr_infos->table_select[i]);
|
|
|
|
for (; lp; lp--, mc--) {
|
|
int x, y;
|
|
|
|
if (!mc) {
|
|
mc = *m++;
|
|
v = get_gain(gr_infos->pow2gain, ((*scf++) + (*pretab++)) << shift, &isbug);
|
|
cb = *m++;
|
|
}
|
|
{
|
|
short const *val = (short const *) h->table;
|
|
while ((y = *val++) < 0) {
|
|
if (get1bit(mp))
|
|
val -= y;
|
|
part2remain--;
|
|
}
|
|
x = y >> 4;
|
|
y &= 0xf;
|
|
}
|
|
if (x == 15) {
|
|
max = cb;
|
|
part2remain -= h->linbits + 1;
|
|
x += getbits(mp, (int) h->linbits);
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[x] * v;
|
|
else
|
|
xr_value = ispow[x] * v;
|
|
}
|
|
else if (x) {
|
|
max = cb;
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[x] * v;
|
|
else
|
|
xr_value = ispow[x] * v;
|
|
part2remain--;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt++ = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
|
|
if (y == 15) {
|
|
max = cb;
|
|
part2remain -= h->linbits + 1;
|
|
y += getbits(mp, (int) h->linbits);
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[y] * v;
|
|
else
|
|
xr_value = ispow[y] * v;
|
|
}
|
|
else if (y) {
|
|
max = cb;
|
|
if (get1bit(mp))
|
|
xr_value = -ispow[y] * v;
|
|
else
|
|
xr_value = ispow[y] * v;
|
|
part2remain--;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt++ = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* short (count1table) values
|
|
*/
|
|
for (; l3 && (part2remain > 0); l3--) {
|
|
struct newhuff const *h = (struct newhuff const *) (htc + gr_infos->count1table_select);
|
|
short const *val = (short const *) h->table;
|
|
short a;
|
|
|
|
while ((a = *val++) < 0) {
|
|
part2remain--;
|
|
if (part2remain < 0) {
|
|
part2remain++;
|
|
a = 0;
|
|
break;
|
|
}
|
|
if (get1bit(mp))
|
|
val -= a;
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
if (!(i & 1)) {
|
|
if (!mc) {
|
|
mc = *m++;
|
|
cb = *m++;
|
|
v = get_gain(gr_infos->pow2gain, ((*scf++) + (*pretab++)) << shift, &isbug);
|
|
}
|
|
mc--;
|
|
}
|
|
if ((a & (0x8 >> i))) {
|
|
max = cb;
|
|
part2remain--;
|
|
if (part2remain < 0) {
|
|
part2remain++;
|
|
break;
|
|
}
|
|
if (get1bit(mp))
|
|
xr_value = -v;
|
|
else
|
|
xr_value = v;
|
|
}
|
|
else
|
|
xr_value = 0.0;
|
|
|
|
if (xrpnt <= xr_endptr)
|
|
*xrpnt++ = xr_value;
|
|
else
|
|
BUFFER_OVERFLOW_BUG();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* zero part
|
|
*/
|
|
while (xrpnt <= xr_endptr)
|
|
*xrpnt++ = 0.0;
|
|
|
|
gr_infos->maxbandl = max + 1;
|
|
gr_infos->maxb = longLimit[sfreq][gr_infos->maxbandl];
|
|
}
|
|
#undef BUFFER_OVERFLOW_BUG
|
|
if (bobug) {
|
|
/* well, there was a bug report, where this happened!
|
|
The problem was, that mixed blocks summed up to over 576,
|
|
because of a wrong long/short switching index.
|
|
It's likely, that the buffer overflow is fixed now, after correcting mixed block map.
|
|
*/
|
|
lame_report_fnc
|
|
(mp->report_err
|
|
,"hip: OOPS, part2remain=%d l3=%d cb=%d bv=%d region1=%d region2=%d b-type=%d mixed=%d\n"
|
|
,part2remain
|
|
,bobug_l3
|
|
,bobug_sb
|
|
,gr_infos->big_values
|
|
,gr_infos->region1start
|
|
,gr_infos->region2start
|
|
,gr_infos->block_type
|
|
,gr_infos->mixed_block_flag
|
|
);
|
|
}
|
|
if (isbug) {
|
|
/* there is a bug report, where there is trouble with IS coded short block gain.
|
|
Is intensity stereo coding implementation correct? Likely not.
|
|
*/
|
|
int i_stereo = 0;
|
|
if (mp->fr.mode == MPG_MD_JOINT_STEREO) {
|
|
i_stereo = mp->fr.mode_ext & 0x1;
|
|
}
|
|
lame_report_fnc
|
|
(mp->report_err
|
|
,"hip: OOPS, 'gainpow2' buffer overflow lsf=%d i-stereo=%d b-type=%d mixed=%d\n"
|
|
,mp->fr.lsf
|
|
,i_stereo
|
|
,gr_infos->block_type
|
|
,gr_infos->mixed_block_flag
|
|
);
|
|
}
|
|
|
|
while (part2remain > 16) {
|
|
getbits(mp, 16); /* Dismiss stuffing Bits */
|
|
part2remain -= 16;
|
|
}
|
|
if (part2remain > 0)
|
|
getbits(mp, part2remain);
|
|
else if (part2remain < 0) {
|
|
lame_report_fnc(mp->report_err, "hip: Can't rewind stream by %d bits!\n", -part2remain);
|
|
return 1; /* -> error */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* intensity position, transmitted via a scalefactor value, allowed range is 0 - 15 */
|
|
static
|
|
int scalefac_to_is_pos(int sf)
|
|
{
|
|
if (0 <= sf && sf <= 15)
|
|
return sf;
|
|
return (sf < 0 ? 0 : 15);
|
|
}
|
|
|
|
/*
|
|
* III_stereo: calculate real channel values for Joint-I-Stereo-mode
|
|
*/
|
|
static void
|
|
III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT], int *scalefac,
|
|
struct gr_info_s *gr_infos, int sfreq, int ms_stereo, int lsf)
|
|
{
|
|
real(*xr)[SBLIMIT * SSLIMIT] = (real(*)[SBLIMIT * SSLIMIT]) xr_buf;
|
|
struct bandInfoStruct const *bi = (struct bandInfoStruct const *) &bandInfo[sfreq];
|
|
real *tabl1, *tabl2;
|
|
|
|
if (lsf) {
|
|
int p = gr_infos->scalefac_compress & 0x1;
|
|
if (ms_stereo) {
|
|
tabl1 = pow1_2[p];
|
|
tabl2 = pow2_2[p];
|
|
}
|
|
else {
|
|
tabl1 = pow1_1[p];
|
|
tabl2 = pow2_1[p];
|
|
}
|
|
}
|
|
else {
|
|
if (ms_stereo) {
|
|
tabl1 = tan1_2;
|
|
tabl2 = tan2_2;
|
|
}
|
|
else {
|
|
tabl1 = tan1_1;
|
|
tabl2 = tan2_1;
|
|
}
|
|
}
|
|
|
|
if (gr_infos->block_type == 2) {
|
|
int lwin, do_l = 0;
|
|
if (gr_infos->mixed_block_flag)
|
|
do_l = 1;
|
|
|
|
for (lwin = 0; lwin < 3; lwin++) { /* process each window */
|
|
/* get first band with zero values */
|
|
int is_p, sb, idx, sfb = gr_infos->maxband[lwin]; /* sfb is minimal 3 for mixed mode */
|
|
if (sfb > 3)
|
|
do_l = 0;
|
|
|
|
for (; sfb < 12; sfb++) {
|
|
is_p = scalefac[sfb * 3 + lwin - gr_infos->mixed_block_flag]; /* scale: 0-15 */
|
|
is_p = scalefac_to_is_pos(is_p);
|
|
if (is_p != 7) {
|
|
real t1, t2;
|
|
sb = bi->shortDiff[sfb];
|
|
idx = bi->shortIdx[sfb] + lwin;
|
|
t1 = tabl1[is_p];
|
|
t2 = tabl2[is_p];
|
|
for (; sb > 0; sb--, idx += 3) {
|
|
real v = xr[0][idx];
|
|
xr[0][idx] = v * t1;
|
|
xr[1][idx] = v * t2;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 1
|
|
/* in the original: copy 10 to 11 , here: copy 11 to 12
|
|
maybe still wrong??? (copy 12 to 13?) */
|
|
is_p = scalefac[11 * 3 + lwin - gr_infos->mixed_block_flag]; /* scale: 0-15 */
|
|
sb = bi->shortDiff[12];
|
|
idx = bi->shortIdx[12] + lwin;
|
|
#else
|
|
is_p = scalefac[10 * 3 + lwin - gr_infos->mixed_block_flag]; /* scale: 0-15 */
|
|
sb = bi->shortDiff[11];
|
|
idx = bi->shortIdx[11] + lwin;
|
|
#endif
|
|
is_p = scalefac_to_is_pos(is_p);
|
|
if (is_p != 7) {
|
|
real t1, t2;
|
|
t1 = tabl1[is_p];
|
|
t2 = tabl2[is_p];
|
|
for (; sb > 0; sb--, idx += 3) {
|
|
real v = xr[0][idx];
|
|
xr[0][idx] = v * t1;
|
|
xr[1][idx] = v * t2;
|
|
}
|
|
}
|
|
} /* end for(lwin; .. ; . ) */
|
|
|
|
if (do_l) {
|
|
/* also check l-part, if ALL bands in the three windows are 'empty'
|
|
* and mode = mixed_mode
|
|
*/
|
|
int sfb = gr_infos->maxbandl;
|
|
int idx = bi->longIdx[sfb];
|
|
|
|
for (; sfb < 8; sfb++) {
|
|
int sb = bi->longDiff[sfb];
|
|
int is_p = scalefac[sfb]; /* scale: 0-15 */
|
|
is_p = scalefac_to_is_pos(is_p);
|
|
if (is_p != 7) {
|
|
real t1, t2;
|
|
t1 = tabl1[is_p];
|
|
t2 = tabl2[is_p];
|
|
for (; sb > 0; sb--, idx++) {
|
|
real v = xr[0][idx];
|
|
xr[0][idx] = v * t1;
|
|
xr[1][idx] = v * t2;
|
|
}
|
|
}
|
|
else
|
|
idx += sb;
|
|
}
|
|
}
|
|
}
|
|
else { /* ((gr_infos->block_type != 2)) */
|
|
|
|
int sfb = gr_infos->maxbandl;
|
|
int is_p, idx = bi->longIdx[sfb];
|
|
for (; sfb < 21; sfb++) {
|
|
int sb = bi->longDiff[sfb];
|
|
is_p = scalefac[sfb]; /* scale: 0-15 */
|
|
is_p = scalefac_to_is_pos(is_p);
|
|
if (is_p != 7) {
|
|
real t1, t2;
|
|
t1 = tabl1[is_p];
|
|
t2 = tabl2[is_p];
|
|
for (; sb > 0; sb--, idx++) {
|
|
real v = xr[0][idx];
|
|
xr[0][idx] = v * t1;
|
|
xr[1][idx] = v * t2;
|
|
}
|
|
}
|
|
else
|
|
idx += sb;
|
|
}
|
|
|
|
is_p = scalefac[20]; /* copy l-band 20 to l-band 21 */
|
|
is_p = scalefac_to_is_pos(is_p);
|
|
idx = bi->longIdx[21];
|
|
if (is_p != 7) {
|
|
int sb;
|
|
real t1 = tabl1[is_p], t2 = tabl2[is_p];
|
|
|
|
for (sb = bi->longDiff[21]; sb > 0; sb--, idx++) {
|
|
real v = xr[0][idx];
|
|
xr[0][idx] = v * t1;
|
|
xr[1][idx] = v * t2;
|
|
}
|
|
}
|
|
} /* ... */
|
|
}
|
|
|
|
static void
|
|
III_antialias(real xr[SBLIMIT][SSLIMIT], struct gr_info_s *gr_infos)
|
|
{
|
|
int sblim;
|
|
|
|
if (gr_infos->block_type == 2) {
|
|
if (!gr_infos->mixed_block_flag)
|
|
return;
|
|
sblim = 1;
|
|
}
|
|
else {
|
|
sblim = gr_infos->maxb - 1;
|
|
}
|
|
|
|
/* 31 alias-reduction operations between each pair of sub-bands */
|
|
/* with 8 butterflies between each pair */
|
|
|
|
{
|
|
int sb;
|
|
real *xr1 = (real *) xr[1];
|
|
|
|
for (sb = sblim; sb; sb--, xr1 += 10) {
|
|
int ss;
|
|
real *cs = aa_cs, *ca = aa_ca;
|
|
real *xr2 = xr1;
|
|
|
|
for (ss = 7; ss >= 0; ss--) { /* upper and lower butterfly inputs */
|
|
real bu = *--xr2, bd = *xr1;
|
|
*xr2 = (bu * (*cs)) - (bd * (*ca));
|
|
*xr1++ = (bd * (*cs++)) + (bu * (*ca++));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* *INDENT-OFF* */
|
|
|
|
/*
|
|
DCT insipired by Jeff Tsay's DCT from the maplay package
|
|
this is an optimized version with manual unroll.
|
|
|
|
References:
|
|
[1] S. Winograd: "On Computing the Discrete Fourier Transform",
|
|
Mathematics of Computation, Volume 32, Number 141, January 1978,
|
|
Pages 175-199
|
|
*/
|
|
|
|
static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf)
|
|
{
|
|
{
|
|
real *in = inbuf;
|
|
|
|
in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14];
|
|
in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11];
|
|
in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8];
|
|
in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5];
|
|
in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2];
|
|
in[2] +=in[1]; in[1] +=in[0];
|
|
|
|
in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9];
|
|
in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1];
|
|
|
|
{
|
|
|
|
#define MACRO0(v) { \
|
|
real tmp; \
|
|
out2[9+(v)] = (tmp = sum0 + sum1) * w[27+(v)]; \
|
|
out2[8-(v)] = tmp * w[26-(v)]; } \
|
|
sum0 -= sum1; \
|
|
ts[SBLIMIT*(8-(v))] = out1[8-(v)] + sum0 * w[8-(v)]; \
|
|
ts[SBLIMIT*(9+(v))] = out1[9+(v)] + sum0 * w[9+(v)];
|
|
#define MACRO1(v) { \
|
|
real sum0,sum1; \
|
|
sum0 = tmp1a + tmp2a; \
|
|
sum1 = (tmp1b + tmp2b) * tfcos36[(v)]; \
|
|
MACRO0(v); }
|
|
#define MACRO2(v) { \
|
|
real sum0,sum1; \
|
|
sum0 = tmp2a - tmp1a; \
|
|
sum1 = (tmp2b - tmp1b) * tfcos36[(v)]; \
|
|
MACRO0(v); }
|
|
|
|
const real *c = COS9;
|
|
real *out2 = o2;
|
|
real *w = wintab;
|
|
real *out1 = o1;
|
|
real *ts = tsbuf;
|
|
|
|
real ta33,ta66,tb33,tb66;
|
|
|
|
ta33 = in[2*3+0] * c[3];
|
|
ta66 = in[2*6+0] * c[6];
|
|
tb33 = in[2*3+1] * c[3];
|
|
tb66 = in[2*6+1] * c[6];
|
|
|
|
{
|
|
real tmp1a,tmp2a,tmp1b,tmp2b;
|
|
tmp1a = in[2*1+0] * c[1] + ta33 + in[2*5+0] * c[5] + in[2*7+0] * c[7];
|
|
tmp1b = in[2*1+1] * c[1] + tb33 + in[2*5+1] * c[5] + in[2*7+1] * c[7];
|
|
tmp2a = in[2*0+0] + in[2*2+0] * c[2] + in[2*4+0] * c[4] + ta66 + in[2*8+0] * c[8];
|
|
tmp2b = in[2*0+1] + in[2*2+1] * c[2] + in[2*4+1] * c[4] + tb66 + in[2*8+1] * c[8];
|
|
|
|
MACRO1(0);
|
|
MACRO2(8);
|
|
}
|
|
|
|
{
|
|
real tmp1a,tmp2a,tmp1b,tmp2b;
|
|
tmp1a = ( in[2*1+0] - in[2*5+0] - in[2*7+0] ) * c[3];
|
|
tmp1b = ( in[2*1+1] - in[2*5+1] - in[2*7+1] ) * c[3];
|
|
tmp2a = ( in[2*2+0] - in[2*4+0] - in[2*8+0] ) * c[6] - in[2*6+0] + in[2*0+0];
|
|
tmp2b = ( in[2*2+1] - in[2*4+1] - in[2*8+1] ) * c[6] - in[2*6+1] + in[2*0+1];
|
|
|
|
MACRO1(1);
|
|
MACRO2(7);
|
|
}
|
|
|
|
{
|
|
real tmp1a,tmp2a,tmp1b,tmp2b;
|
|
tmp1a = in[2*1+0] * c[5] - ta33 - in[2*5+0] * c[7] + in[2*7+0] * c[1];
|
|
tmp1b = in[2*1+1] * c[5] - tb33 - in[2*5+1] * c[7] + in[2*7+1] * c[1];
|
|
tmp2a = in[2*0+0] - in[2*2+0] * c[8] - in[2*4+0] * c[2] + ta66 + in[2*8+0] * c[4];
|
|
tmp2b = in[2*0+1] - in[2*2+1] * c[8] - in[2*4+1] * c[2] + tb66 + in[2*8+1] * c[4];
|
|
|
|
MACRO1(2);
|
|
MACRO2(6);
|
|
}
|
|
|
|
{
|
|
real tmp1a,tmp2a,tmp1b,tmp2b;
|
|
tmp1a = in[2*1+0] * c[7] - ta33 + in[2*5+0] * c[1] - in[2*7+0] * c[5];
|
|
tmp1b = in[2*1+1] * c[7] - tb33 + in[2*5+1] * c[1] - in[2*7+1] * c[5];
|
|
tmp2a = in[2*0+0] - in[2*2+0] * c[4] + in[2*4+0] * c[8] + ta66 - in[2*8+0] * c[2];
|
|
tmp2b = in[2*0+1] - in[2*2+1] * c[4] + in[2*4+1] * c[8] + tb66 - in[2*8+1] * c[2];
|
|
|
|
MACRO1(3);
|
|
MACRO2(5);
|
|
}
|
|
|
|
{
|
|
real sum0,sum1;
|
|
sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0];
|
|
sum1 = (in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ) * tfcos36[4];
|
|
MACRO0(4);
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* new DCT12
|
|
*/
|
|
static void dct12(real *in,real *rawout1,real *rawout2,real *wi,real *ts)
|
|
{
|
|
#define DCT12_PART1 \
|
|
in5 = in[5*3]; \
|
|
in5 += (in4 = in[4*3]); \
|
|
in4 += (in3 = in[3*3]); \
|
|
in3 += (in2 = in[2*3]); \
|
|
in2 += (in1 = in[1*3]); \
|
|
in1 += (in0 = in[0*3]); \
|
|
\
|
|
in5 += in3; in3 += in1; \
|
|
\
|
|
in2 *= COS6_1; \
|
|
in3 *= COS6_1; \
|
|
|
|
#define DCT12_PART2 \
|
|
in0 += in4 * COS6_2; \
|
|
\
|
|
in4 = in0 + in2; \
|
|
in0 -= in2; \
|
|
\
|
|
in1 += in5 * COS6_2; \
|
|
\
|
|
in5 = (in1 + in3) * tfcos12[0]; \
|
|
in1 = (in1 - in3) * tfcos12[2]; \
|
|
\
|
|
in3 = in4 + in5; \
|
|
in4 -= in5; \
|
|
\
|
|
in2 = in0 + in1; \
|
|
in0 -= in1;
|
|
|
|
|
|
{
|
|
real in0,in1,in2,in3,in4,in5;
|
|
real *out1 = rawout1;
|
|
ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2];
|
|
ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5];
|
|
|
|
DCT12_PART1
|
|
|
|
{
|
|
real tmp0,tmp1 = (in0 - in4);
|
|
{
|
|
real tmp2 = (in1 - in5) * tfcos12[1];
|
|
tmp0 = tmp1 + tmp2;
|
|
tmp1 -= tmp2;
|
|
}
|
|
ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1];
|
|
ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1];
|
|
ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1];
|
|
ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1];
|
|
}
|
|
|
|
DCT12_PART2
|
|
|
|
ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0];
|
|
ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0];
|
|
ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2];
|
|
ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2];
|
|
|
|
ts[(6+0)*SBLIMIT] = out1[6+0] + in0 * wi[0];
|
|
ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0];
|
|
ts[(6+2)*SBLIMIT] = out1[6+2] + in4 * wi[2];
|
|
ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2];
|
|
}
|
|
|
|
in++;
|
|
|
|
{
|
|
real in0,in1,in2,in3,in4,in5;
|
|
real *out2 = rawout2;
|
|
|
|
DCT12_PART1
|
|
|
|
{
|
|
real tmp0,tmp1 = (in0 - in4);
|
|
{
|
|
real tmp2 = (in1 - in5) * tfcos12[1];
|
|
tmp0 = tmp1 + tmp2;
|
|
tmp1 -= tmp2;
|
|
}
|
|
out2[5-1] = tmp0 * wi[11-1];
|
|
out2[0+1] = tmp0 * wi[6+1];
|
|
ts[(12+1)*SBLIMIT] += tmp1 * wi[1];
|
|
ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1];
|
|
}
|
|
|
|
DCT12_PART2
|
|
|
|
out2[5-0] = in2 * wi[11-0];
|
|
out2[0+0] = in2 * wi[6+0];
|
|
out2[0+2] = in3 * wi[6+2];
|
|
out2[5-2] = in3 * wi[11-2];
|
|
|
|
ts[(12+0)*SBLIMIT] += in0 * wi[0];
|
|
ts[(17-0)*SBLIMIT] += in0 * wi[5-0];
|
|
ts[(12+2)*SBLIMIT] += in4 * wi[2];
|
|
ts[(17-2)*SBLIMIT] += in4 * wi[5-2];
|
|
}
|
|
|
|
in++;
|
|
|
|
{
|
|
real in0,in1,in2,in3,in4,in5;
|
|
real *out2 = rawout2;
|
|
out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0;
|
|
|
|
DCT12_PART1
|
|
|
|
{
|
|
real tmp0,tmp1 = (in0 - in4);
|
|
{
|
|
real tmp2 = (in1 - in5) * tfcos12[1];
|
|
tmp0 = tmp1 + tmp2;
|
|
tmp1 -= tmp2;
|
|
}
|
|
out2[11-1] = tmp0 * wi[11-1];
|
|
out2[6 +1] = tmp0 * wi[6+1];
|
|
out2[0+1] += tmp1 * wi[1];
|
|
out2[5-1] += tmp1 * wi[5-1];
|
|
}
|
|
|
|
DCT12_PART2
|
|
|
|
out2[11-0] = in2 * wi[11-0];
|
|
out2[6 +0] = in2 * wi[6+0];
|
|
out2[6 +2] = in3 * wi[6+2];
|
|
out2[11-2] = in3 * wi[11-2];
|
|
|
|
out2[0+0] += in0 * wi[0];
|
|
out2[5-0] += in0 * wi[5-0];
|
|
out2[0+2] += in4 * wi[2];
|
|
out2[5-2] += in4 * wi[5-2];
|
|
}
|
|
}
|
|
/* *INDENT-ON* */
|
|
|
|
/*
|
|
* III_hybrid
|
|
*/
|
|
static void
|
|
III_hybrid(PMPSTR mp, real fsIn[SBLIMIT][SSLIMIT], real tsOut[SSLIMIT][SBLIMIT],
|
|
int ch, struct gr_info_s *gr_infos)
|
|
{
|
|
real *tspnt = (real *) tsOut;
|
|
real(*block)[2][SBLIMIT * SSLIMIT] = mp->hybrid_block;
|
|
int *blc = mp->hybrid_blc;
|
|
real *rawout1, *rawout2;
|
|
int bt;
|
|
int sb = 0;
|
|
|
|
{
|
|
int b = blc[ch];
|
|
rawout1 = block[b][ch];
|
|
b = -b + 1;
|
|
rawout2 = block[b][ch];
|
|
blc[ch] = b;
|
|
}
|
|
|
|
|
|
if (gr_infos->mixed_block_flag) {
|
|
sb = 2;
|
|
dct36(fsIn[0], rawout1, rawout2, win[0], tspnt);
|
|
dct36(fsIn[1], rawout1 + 18, rawout2 + 18, win1[0], tspnt + 1);
|
|
rawout1 += 36;
|
|
rawout2 += 36;
|
|
tspnt += 2;
|
|
}
|
|
|
|
bt = gr_infos->block_type;
|
|
if (bt == 2) {
|
|
for (; sb < (int) gr_infos->maxb; sb += 2, tspnt += 2, rawout1 += 36, rawout2 += 36) {
|
|
dct12(fsIn[sb], rawout1, rawout2, win[2], tspnt);
|
|
dct12(fsIn[sb + 1], rawout1 + 18, rawout2 + 18, win1[2], tspnt + 1);
|
|
}
|
|
}
|
|
else {
|
|
for (; sb < (int) gr_infos->maxb; sb += 2, tspnt += 2, rawout1 += 36, rawout2 += 36) {
|
|
dct36(fsIn[sb], rawout1, rawout2, win[bt], tspnt);
|
|
dct36(fsIn[sb + 1], rawout1 + 18, rawout2 + 18, win1[bt], tspnt + 1);
|
|
}
|
|
}
|
|
|
|
for (; sb < SBLIMIT; sb++, tspnt++) {
|
|
int i;
|
|
for (i = 0; i < SSLIMIT; i++) {
|
|
tspnt[i * SBLIMIT] = *rawout1++;
|
|
*rawout2++ = 0.0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* main layer3 handler
|
|
*/
|
|
|
|
int
|
|
layer3_audiodata_precedesframes(PMPSTR mp)
|
|
{
|
|
int audioDataInFrame;
|
|
int framesToBacktrack;
|
|
|
|
/* specific to Layer 3, since Layer 1 & 2 the audio data starts at the frame that describes it. */
|
|
/* determine how many bytes and therefore bitstream frames the audio data precedes it's matching frame */
|
|
/* lame_report_fnc(mp->report_err, "hip: main_data_begin = %d, mp->bsize %d, mp->fsizeold %d, mp->ssize %d\n",
|
|
sideinfo.main_data_begin, mp->bsize, mp->fsizeold, mp->ssize); */
|
|
/* compute the number of frames to backtrack, 4 for the header, ssize already holds the CRC */
|
|
/* TODO Erroneously assumes current frame is same as previous frame. */
|
|
audioDataInFrame = mp->bsize - 4 - mp->ssize;
|
|
framesToBacktrack = (mp->sideinfo.main_data_begin + audioDataInFrame - 1) / audioDataInFrame;
|
|
/* lame_report_fnc(mp->report_err, "hip: audioDataInFrame %d framesToBacktrack %d\n", audioDataInFrame, framesToBacktrack); */
|
|
return framesToBacktrack;
|
|
}
|
|
|
|
int
|
|
decode_layer3_sideinfo(PMPSTR mp)
|
|
{
|
|
struct frame *fr = &mp->fr;
|
|
int stereo = fr->stereo;
|
|
int single = fr->single;
|
|
int ms_stereo;
|
|
int sfreq = fr->sampling_frequency;
|
|
int granules;
|
|
int ch, gr, databits;
|
|
|
|
if (stereo == 1) { /* stream is mono */
|
|
single = 0;
|
|
}
|
|
|
|
if (fr->mode == MPG_MD_JOINT_STEREO) {
|
|
ms_stereo = fr->mode_ext & 0x2;
|
|
}
|
|
else
|
|
ms_stereo = 0;
|
|
|
|
|
|
if (fr->lsf) {
|
|
granules = 1;
|
|
III_get_side_info_2(mp, stereo, ms_stereo, sfreq, single);
|
|
}
|
|
else {
|
|
granules = 2;
|
|
III_get_side_info_1(mp, stereo, ms_stereo, sfreq, single);
|
|
}
|
|
|
|
databits = 0;
|
|
for (gr = 0; gr < granules; ++gr) {
|
|
for (ch = 0; ch < stereo; ++ch) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[gr]);
|
|
databits += gr_infos->part2_3_length;
|
|
}
|
|
}
|
|
return databits - 8 * mp->sideinfo.main_data_begin;
|
|
}
|
|
|
|
|
|
|
|
int
|
|
decode_layer3_frame(PMPSTR mp, unsigned char *pcm_sample, int *pcm_point,
|
|
int (*synth_1to1_mono_ptr) (PMPSTR, real *, unsigned char *, int *),
|
|
int (*synth_1to1_ptr) (PMPSTR, real *, int, unsigned char *, int *))
|
|
{
|
|
int gr, ch, ss, clip = 0;
|
|
int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */
|
|
/* struct III_sideinfo sideinfo; */
|
|
struct frame *fr = &(mp->fr);
|
|
int stereo = fr->stereo;
|
|
int single = fr->single;
|
|
int ms_stereo, i_stereo;
|
|
int sfreq = fr->sampling_frequency;
|
|
int stereo1, granules;
|
|
real hybridIn[2][SBLIMIT][SSLIMIT];
|
|
real hybridOut[2][SSLIMIT][SBLIMIT];
|
|
|
|
if (set_pointer(mp, (int) mp->sideinfo.main_data_begin) == MP3_ERR)
|
|
return 0;
|
|
|
|
if (stereo == 1) { /* stream is mono */
|
|
stereo1 = 1;
|
|
single = 0;
|
|
}
|
|
else if (single >= 0) /* stream is stereo, but force to mono */
|
|
stereo1 = 1;
|
|
else
|
|
stereo1 = 2;
|
|
|
|
if (fr->mode == MPG_MD_JOINT_STEREO) {
|
|
ms_stereo = fr->mode_ext & 0x2;
|
|
i_stereo = fr->mode_ext & 0x1;
|
|
}
|
|
else
|
|
ms_stereo = i_stereo = 0;
|
|
|
|
|
|
if (fr->lsf) {
|
|
granules = 1;
|
|
}
|
|
else {
|
|
granules = 2;
|
|
}
|
|
|
|
for (gr = 0; gr < granules; gr++) {
|
|
|
|
{
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[0].gr[gr]);
|
|
long part2bits;
|
|
|
|
if (fr->lsf)
|
|
part2bits = III_get_scale_factors_2(mp, scalefacs[0], gr_infos, 0);
|
|
else {
|
|
part2bits = III_get_scale_factors_1(mp, scalefacs[0], gr_infos);
|
|
}
|
|
if (mp->pinfo != NULL) {
|
|
int i;
|
|
mp->pinfo->sfbits[gr][0] = part2bits;
|
|
for (i = 0; i < 39; i++)
|
|
mp->pinfo->sfb_s[gr][0][i] = scalefacs[0][i];
|
|
}
|
|
|
|
/* lame_report_fnc(mp->report_err, "calling III dequantize sample 1 gr_infos->part2_3_length %d\n", gr_infos->part2_3_length); */
|
|
if (III_dequantize_sample(mp, hybridIn[0], scalefacs[0], gr_infos, sfreq, part2bits))
|
|
return clip;
|
|
}
|
|
if (stereo == 2) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[1].gr[gr]);
|
|
long part2bits;
|
|
if (fr->lsf)
|
|
part2bits = III_get_scale_factors_2(mp, scalefacs[1], gr_infos, i_stereo);
|
|
else {
|
|
part2bits = III_get_scale_factors_1(mp, scalefacs[1], gr_infos);
|
|
}
|
|
if (mp->pinfo != NULL) {
|
|
int i;
|
|
mp->pinfo->sfbits[gr][1] = part2bits;
|
|
for (i = 0; i < 39; i++)
|
|
mp->pinfo->sfb_s[gr][1][i] = scalefacs[1][i];
|
|
}
|
|
|
|
/* lame_report_fnc(mp->report_err, "calling III dequantize sample 2 gr_infos->part2_3_length %d\n", gr_infos->part2_3_length); */
|
|
if (III_dequantize_sample(mp, hybridIn[1], scalefacs[1], gr_infos, sfreq, part2bits))
|
|
return clip;
|
|
|
|
if (ms_stereo) {
|
|
int i;
|
|
for (i = 0; i < SBLIMIT * SSLIMIT; i++) {
|
|
real tmp0, tmp1;
|
|
tmp0 = ((real *) hybridIn[0])[i];
|
|
tmp1 = ((real *) hybridIn[1])[i];
|
|
((real *) hybridIn[1])[i] = tmp0 - tmp1;
|
|
((real *) hybridIn[0])[i] = tmp0 + tmp1;
|
|
}
|
|
}
|
|
|
|
if (i_stereo)
|
|
III_i_stereo(hybridIn, scalefacs[1], gr_infos, sfreq, ms_stereo, fr->lsf);
|
|
|
|
if (ms_stereo || i_stereo || (single == 3)) {
|
|
if (gr_infos->maxb > mp->sideinfo.ch[0].gr[gr].maxb)
|
|
mp->sideinfo.ch[0].gr[gr].maxb = gr_infos->maxb;
|
|
else
|
|
gr_infos->maxb = mp->sideinfo.ch[0].gr[gr].maxb;
|
|
}
|
|
|
|
switch (single) {
|
|
case 3:
|
|
{
|
|
int i;
|
|
real *in0 = (real *) hybridIn[0], *in1 = (real *) hybridIn[1];
|
|
for (i = 0; i < (int) (SSLIMIT * gr_infos->maxb); i++, in0++)
|
|
*in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */
|
|
}
|
|
break;
|
|
case 1:
|
|
{
|
|
int i;
|
|
real *in0 = (real *) hybridIn[0], *in1 = (real *) hybridIn[1];
|
|
for (i = 0; i < (int) (SSLIMIT * gr_infos->maxb); i++)
|
|
*in0++ = *in1++;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (mp->pinfo != NULL) {
|
|
int i, sb;
|
|
float ifqstep;
|
|
|
|
mp->pinfo->bitrate = tabsel_123[fr->lsf][fr->lay - 1][fr->bitrate_index];
|
|
mp->pinfo->sampfreq = freqs[sfreq];
|
|
mp->pinfo->emph = fr->emphasis;
|
|
mp->pinfo->crc = fr->error_protection;
|
|
mp->pinfo->padding = fr->padding;
|
|
mp->pinfo->stereo = fr->stereo;
|
|
mp->pinfo->js = (fr->mode == MPG_MD_JOINT_STEREO);
|
|
mp->pinfo->ms_stereo = ms_stereo;
|
|
mp->pinfo->i_stereo = i_stereo;
|
|
mp->pinfo->maindata = mp->sideinfo.main_data_begin;
|
|
|
|
for (ch = 0; ch < stereo1; ch++) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[gr]);
|
|
mp->pinfo->big_values[gr][ch] = gr_infos->big_values;
|
|
mp->pinfo->scalefac_scale[gr][ch] = gr_infos->scalefac_scale;
|
|
mp->pinfo->mixed[gr][ch] = gr_infos->mixed_block_flag;
|
|
mp->pinfo->mpg123blocktype[gr][ch] = gr_infos->block_type;
|
|
mp->pinfo->mainbits[gr][ch] = gr_infos->part2_3_length;
|
|
mp->pinfo->preflag[gr][ch] = gr_infos->preflag;
|
|
if (gr == 1)
|
|
mp->pinfo->scfsi[ch] = gr_infos->scfsi;
|
|
}
|
|
|
|
|
|
for (ch = 0; ch < stereo1; ch++) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[gr]);
|
|
ifqstep = (mp->pinfo->scalefac_scale[gr][ch] == 0) ? .5 : 1.0;
|
|
if (2 == gr_infos->block_type) {
|
|
for (i = 0; i < 3; i++) {
|
|
for (sb = 0; sb < 12; sb++) {
|
|
int j = 3 * sb + i;
|
|
/*
|
|
is_p = scalefac[sfb*3+lwin-gr_infos->mixed_block_flag];
|
|
*/
|
|
/* scalefac was copied into pinfo->sfb_s[] above */
|
|
mp->pinfo->sfb_s[gr][ch][j] =
|
|
-ifqstep * mp->pinfo->sfb_s[gr][ch][j - gr_infos->mixed_block_flag];
|
|
mp->pinfo->sfb_s[gr][ch][j] -= 2 * (mp->pinfo->sub_gain[gr][ch][i]);
|
|
}
|
|
mp->pinfo->sfb_s[gr][ch][3 * sb + i] =
|
|
-2 * (mp->pinfo->sub_gain[gr][ch][i]);
|
|
}
|
|
}
|
|
else {
|
|
for (sb = 0; sb < 21; sb++) {
|
|
/* scalefac was copied into pinfo->sfb[] above */
|
|
mp->pinfo->sfb[gr][ch][sb] = mp->pinfo->sfb_s[gr][ch][sb];
|
|
if (gr_infos->preflag)
|
|
mp->pinfo->sfb[gr][ch][sb] += pretab1[sb];
|
|
mp->pinfo->sfb[gr][ch][sb] *= -ifqstep;
|
|
}
|
|
mp->pinfo->sfb[gr][ch][21] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
for (ch = 0; ch < stereo1; ch++) {
|
|
int j = 0;
|
|
for (sb = 0; sb < SBLIMIT; sb++)
|
|
for (ss = 0; ss < SSLIMIT; ss++, j++)
|
|
mp->pinfo->mpg123xr[gr][ch][j] = hybridIn[ch][sb][ss];
|
|
}
|
|
}
|
|
|
|
|
|
for (ch = 0; ch < stereo1; ch++) {
|
|
struct gr_info_s *gr_infos = &(mp->sideinfo.ch[ch].gr[gr]);
|
|
III_antialias(hybridIn[ch], gr_infos);
|
|
III_hybrid(mp, hybridIn[ch], hybridOut[ch], ch, gr_infos);
|
|
}
|
|
|
|
for (ss = 0; ss < SSLIMIT; ss++) {
|
|
if (single >= 0) {
|
|
clip += (*synth_1to1_mono_ptr) (mp, hybridOut[0][ss], pcm_sample, pcm_point);
|
|
}
|
|
else {
|
|
int p1 = *pcm_point;
|
|
clip += (*synth_1to1_ptr) (mp, hybridOut[0][ss], 0, pcm_sample, &p1);
|
|
clip += (*synth_1to1_ptr) (mp, hybridOut[1][ss], 1, pcm_sample, pcm_point);
|
|
}
|
|
}
|
|
}
|
|
|
|
return clip;
|
|
}
|