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/*
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* MP3 quantization
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*
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* Copyright (c) 1999 Mark Taylor
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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: vbrquantize.c,v 1.41 2001/03/12 07:26:08 markt 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 <assert.h>
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#include "util.h"
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#include "l3side.h"
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#include "quantize.h"
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#include "reservoir.h"
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#include "quantize_pvt.h"
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#include "lame-analysis.h"
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif
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#undef MAXQUANTERROR
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typedef union {
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float f;
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int i;
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} fi_union;
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#define MAGIC_FLOAT (65536*(128))
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#define MAGIC_INT 0x4b000000
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#ifdef TAKEHIRO_IEEE754_HACK
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#ifdef MAXQUANTERROR
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#define DUFFBLOCK() do { \
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xp = xr34[0] * sfpow34_p1; \
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xe = xr34[0] * sfpow34_eq; \
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xm = xr34[0] * sfpow34_m1; \
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if (xm > IXMAX_VAL) \
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return -1; \
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xp += MAGIC_FLOAT; \
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xe += MAGIC_FLOAT; \
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xm += MAGIC_FLOAT; \
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fi[0].f = xp; \
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fi[1].f = xe; \
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fi[2].f = xm; \
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fi[0].f = xp + (adj43asm - MAGIC_INT)[fi[0].i]; \
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fi[1].f = xe + (adj43asm - MAGIC_INT)[fi[1].i]; \
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fi[2].f = xm + (adj43asm - MAGIC_INT)[fi[2].i]; \
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fi[0].i -= MAGIC_INT; \
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fi[1].i -= MAGIC_INT; \
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fi[2].i -= MAGIC_INT; \
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x0 = fabs(xr[0]); \
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xp = x0 - pow43[fi[0].i] * sfpow_p1; \
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xe = x0 - pow43[fi[1].i] * sfpow_eq; \
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xm = x0 - pow43[fi[2].i] * sfpow_m1; \
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xp *= xp; \
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xe *= xe; \
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xm *= xm; \
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xfsf_eq = Max(xfsf_eq, xe); \
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xfsf_p1 = Max(xfsf_p1, xp); \
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xfsf_m1 = Max(xfsf_m1, xm); \
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++xr; \
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++xr34; \
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} while(0)
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#else
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#define DUFFBLOCK() do { \
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xp = xr34[0] * sfpow34_p1; \
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xe = xr34[0] * sfpow34_eq; \
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xm = xr34[0] * sfpow34_m1; \
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if (xm > IXMAX_VAL) \
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return -1; \
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xp += MAGIC_FLOAT; \
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xe += MAGIC_FLOAT; \
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xm += MAGIC_FLOAT; \
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fi[0].f = xp; \
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fi[1].f = xe; \
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fi[2].f = xm; \
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fi[0].f = xp + (adj43asm - MAGIC_INT)[fi[0].i]; \
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fi[1].f = xe + (adj43asm - MAGIC_INT)[fi[1].i]; \
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fi[2].f = xm + (adj43asm - MAGIC_INT)[fi[2].i]; \
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fi[0].i -= MAGIC_INT; \
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fi[1].i -= MAGIC_INT; \
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fi[2].i -= MAGIC_INT; \
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x0 = fabs(xr[0]); \
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xp = x0 - pow43[fi[0].i] * sfpow_p1; \
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xe = x0 - pow43[fi[1].i] * sfpow_eq; \
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xm = x0 - pow43[fi[2].i] * sfpow_m1; \
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xfsf_p1 += xp * xp; \
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xfsf_eq += xe * xe; \
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xfsf_m1 += xm * xm; \
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++xr; \
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++xr34; \
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} while(0)
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#endif
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#else
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/*********************************************************************
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* XRPOW_FTOI is a macro to convert floats to ints.
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* if XRPOW_FTOI(x) = nearest_int(x), then QUANTFAC(x)=adj43asm[x]
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* ROUNDFAC= -0.0946
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*
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* if XRPOW_FTOI(x) = floor(x), then QUANTFAC(x)=asj43[x]
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* ROUNDFAC=0.4054
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*********************************************************************/
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# define QUANTFAC(rx) adj43[rx]
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# define ROUNDFAC 0.4054
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# define XRPOW_FTOI(src,dest) ((dest) = (int)(src))
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#endif
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static FLOAT8
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calc_sfb_noise(const FLOAT8 *xr, const FLOAT8 *xr34, const int bw, const int sf)
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{
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int j;
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fi_union fi;
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FLOAT8 temp;
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FLOAT8 xfsf=0;
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FLOAT8 sfpow,sfpow34;
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sfpow = POW20(sf+210); /*pow(2.0,sf/4.0); */
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sfpow34 = IPOW20(sf+210); /*pow(sfpow,-3.0/4.0);*/
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for ( j=0; j < bw ; ++j) {
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#if 0
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int ix;
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if (xr34[j]*sfpow34 > IXMAX_VAL) return -1;
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ix=floor( xr34[j]*sfpow34);
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temp = fabs(xr[j])- pow43[ix]*sfpow;
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temp *= temp;
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if (ix < IXMAX_VAL) {
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temp2 = fabs(xr[j])- pow43[ix+1]*sfpow;
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temp2 *=temp2;
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if (temp2<temp) {
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temp=temp2;
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++ix;
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}
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}
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#else
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if (xr34[j]*sfpow34 > IXMAX_VAL) return -1;
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#ifdef TAKEHIRO_IEEE754_HACK
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temp = sfpow34*xr34[j];
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temp += MAGIC_FLOAT;
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fi.f = temp;
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fi.f = temp + (adj43asm - MAGIC_INT)[fi.i];
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fi.i -= MAGIC_INT;
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#else
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temp = xr34[j]*sfpow34;
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XRPOW_FTOI(temp, fi.i);
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XRPOW_FTOI(temp + QUANTFAC(fi.i), fi.i);
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#endif
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temp = fabs(xr[j])- pow43[fi.i]*sfpow;
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temp *= temp;
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#endif
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#ifdef MAXQUANTERROR
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xfsf = Max(xfsf,temp);
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#else
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xfsf += temp;
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#endif
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}
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#ifdef MAXQUANTERROR
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return xfsf;
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#else
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return xfsf;//bw;
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#endif
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}
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static FLOAT8
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calc_sfb_noise_ave(const FLOAT8 *xr, const FLOAT8 *xr34, const int bw, const int sf)
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{
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double xp;
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double xe;
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double xm;
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#ifdef TAKEHIRO_IEEE754_HACK
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double x0;
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#endif
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int xx[3], j;
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fi_union *fi = (fi_union *)xx;
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FLOAT8 sfpow34_eq, sfpow34_p1, sfpow34_m1;
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FLOAT8 sfpow_eq, sfpow_p1, sfpow_m1;
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FLOAT8 xfsf_eq = 0, xfsf_p1 = 0, xfsf_m1 = 0;
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sfpow_eq = POW20(sf + 210); /*pow(2.0,sf/4.0); */
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sfpow_m1 = sfpow_eq * .8408964153; /* pow(2,(sf-1)/4.0) */
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sfpow_p1 = sfpow_eq * 1.189207115;
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sfpow34_eq = IPOW20(sf + 210); /*pow(sfpow,-3.0/4.0);*/
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sfpow34_m1 = sfpow34_eq * 1.13878863476; /* .84089 ^ -3/4 */
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sfpow34_p1 = sfpow34_eq * 0.878126080187;
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#ifdef TAKEHIRO_IEEE754_HACK
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/*
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* loop unrolled into "Duff's Device". Robert Hegemann
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*/
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j = (bw+3) / 4;
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switch (bw % 4) {
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default:
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case 0: do{ DUFFBLOCK();
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case 3: DUFFBLOCK();
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case 2: DUFFBLOCK();
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case 1: DUFFBLOCK(); } while (--j);
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}
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#else
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for (j = 0; j < bw; ++j) {
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if (xr34[j]*sfpow34_m1 > IXMAX_VAL) return -1;
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xe = xr34[j]*sfpow34_eq;
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XRPOW_FTOI(xe, fi[0].i);
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XRPOW_FTOI(xe + QUANTFAC(fi[0].i), fi[0].i);
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xe = fabs(xr[j])- pow43[fi[0].i]*sfpow_eq;
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xe *= xe;
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xp = xr34[j]*sfpow34_p1;
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XRPOW_FTOI(xp, fi[0].i);
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XRPOW_FTOI(xp + QUANTFAC(fi[0].i), fi[0].i);
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xp = fabs(xr[j])- pow43[fi[0].i]*sfpow_p1;
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xp *= xp;
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xm = xr34[j]*sfpow34_m1;
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XRPOW_FTOI(xm, fi[0].i);
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XRPOW_FTOI(xm + QUANTFAC(fi[0].i), fi[0].i);
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xm = fabs(xr[j])- pow43[fi[0].i]*sfpow_m1;
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xm *= xm;
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#ifdef MAXQUANTERROR
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xfsf_eq = Max(xfsf,xm);
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xfsf_p1 = Max(xfsf_p1,xp);
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xfsf_m1 = Max(xfsf_m1,xm);
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#else
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xfsf_eq += xe;
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xfsf_p1 += xp;
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xfsf_m1 += xm;
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#endif
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}
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#endif
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if (xfsf_eq < xfsf_p1)
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xfsf_eq = xfsf_p1;
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if (xfsf_eq < xfsf_m1)
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xfsf_eq = xfsf_m1;
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#ifdef MAXQUANTERROR
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return xfsf_eq;
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#else
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return xfsf_eq;//bw;
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#endif
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}
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static int
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find_scalefac(const FLOAT8 *xr, const FLOAT8 *xr34, const int sfb,
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const FLOAT8 l3_xmin, const int bw)
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{
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FLOAT8 xfsf;
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int i,sf,sf_ok,delsf;
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/* search will range from sf: -209 -> 45 */
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sf = -82;
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delsf = 128;
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sf_ok=10000;
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for (i=0; i<7; i++) {
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delsf /= 2;
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xfsf = calc_sfb_noise(xr,xr34,bw,sf);
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296 |
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297 |
if (xfsf < 0) {
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/* scalefactors too small */
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sf += delsf;
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}else{
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if (sf_ok==10000) sf_ok=sf;
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if (xfsf > l3_xmin) {
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/* distortion. try a smaller scalefactor */
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sf -= delsf;
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}else{
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sf_ok = sf;
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sf += delsf;
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}
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}
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310 |
}
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assert(sf_ok!=10000);
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#if 0
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assert(delsf==1); /* when for loop goes up to 7 */
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#endif
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return sf;
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}
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318 |
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319 |
static int
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320 |
find_scalefac_ave(const FLOAT8 *xr, const FLOAT8 *xr34, const int sfb,
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321 |
const FLOAT8 l3_xmin, const int bw)
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322 |
{
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323 |
FLOAT8 xfsf;
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324 |
int i,sf,sf_ok,delsf;
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325 |
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326 |
/* search will range from sf: -209 -> 45 */
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sf = -82;
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delsf = 128;
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329 |
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330 |
sf_ok=10000;
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331 |
for (i=0; i<7; i++) {
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delsf /= 2;
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xfsf = calc_sfb_noise_ave(xr,xr34,bw,sf);
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334 |
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335 |
if (xfsf < 0) {
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/* scalefactors too small */
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sf += delsf;
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}else{
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339 |
if (sf_ok==10000) sf_ok=sf;
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340 |
if (xfsf > l3_xmin) {
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341 |
/* distortion. try a smaller scalefactor */
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|
342 |
sf -= delsf;
|
|
|
343 |
}else{
|
|
|
344 |
sf_ok = sf;
|
|
|
345 |
sf += delsf;
|
|
|
346 |
}
|
|
|
347 |
}
|
|
|
348 |
}
|
|
|
349 |
assert(sf_ok!=10000);
|
|
|
350 |
#if 0
|
|
|
351 |
assert(delsf==1); /* when for loop goes up to 7 */
|
|
|
352 |
#endif
|
|
|
353 |
|
|
|
354 |
return sf;
|
|
|
355 |
}
|
|
|
356 |
|
|
|
357 |
|
|
|
358 |
|
|
|
359 |
/* ???
|
|
|
360 |
How do the following tables look like for MPEG-2-LSF
|
|
|
361 |
??? */
|
|
|
362 |
|
|
|
363 |
|
|
|
364 |
|
|
|
365 |
static const int max_range_short[SBPSY_s] =
|
|
|
366 |
{15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7 };
|
|
|
367 |
|
|
|
368 |
static const int max_range_long[SBPSY_l] =
|
|
|
369 |
{15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7};
|
|
|
370 |
|
|
|
371 |
static const int max_range_short_lsf[SBPSY_s] =
|
|
|
372 |
{15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7 };
|
|
|
373 |
|
|
|
374 |
/*static const int max_range_short_lsf_pretab[SBPSY_s] =
|
|
|
375 |
{}*/
|
|
|
376 |
|
|
|
377 |
static const int max_range_long_lsf[SBPSY_l] =
|
|
|
378 |
{15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7};
|
|
|
379 |
|
|
|
380 |
static const int max_range_long_lsf_pretab[SBPSY_l] =
|
|
|
381 |
{ 7,7,7,7,7,7, 3,3,3,3,3, 0,0,0,0, 0,0,0, 0,0,0 };
|
|
|
382 |
|
|
|
383 |
|
|
|
384 |
static int
|
|
|
385 |
compute_scalefacs_short_lsf (
|
|
|
386 |
int sf[SBPSY_s][3],gr_info *cod_info, int scalefac[SBPSY_s][3],int sbg[3])
|
|
|
387 |
{
|
|
|
388 |
int maxrange, maxrange1, maxrange2, maxover;
|
|
|
389 |
int sfb, i;
|
|
|
390 |
int ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
391 |
|
|
|
392 |
maxover = 0;
|
|
|
393 |
maxrange1 = max_range_short_lsf[0];
|
|
|
394 |
maxrange2 = max_range_short_lsf[6];
|
|
|
395 |
|
|
|
396 |
|
|
|
397 |
for (i=0; i<3; ++i) {
|
|
|
398 |
int maxsf1 = 0, maxsf2 = 0, minsf = 1000;
|
|
|
399 |
/* see if we should use subblock gain */
|
|
|
400 |
for (sfb = 0; sfb < SBPSY_s; sfb++) {
|
|
|
401 |
if (sfb < 6) {
|
|
|
402 |
if (maxsf1 < -sf[sfb][i])
|
|
|
403 |
maxsf1 = -sf[sfb][i];
|
|
|
404 |
} else {
|
|
|
405 |
if (maxsf2 < -sf[sfb][i])
|
|
|
406 |
maxsf2 = -sf[sfb][i];
|
|
|
407 |
}
|
|
|
408 |
if (minsf > -sf[sfb][i])
|
|
|
409 |
minsf = -sf[sfb][i];
|
|
|
410 |
}
|
|
|
411 |
|
|
|
412 |
/* boost subblock gain as little as possible so we can
|
|
|
413 |
* reach maxsf1 with scalefactors
|
|
|
414 |
* 8*sbg >= maxsf1
|
|
|
415 |
*/
|
|
|
416 |
maxsf1 = Max (maxsf1-maxrange1*ifqstep, maxsf2-maxrange2*ifqstep);
|
|
|
417 |
sbg[i] = 0;
|
|
|
418 |
if (minsf > 0)
|
|
|
419 |
sbg[i] = floor (.125*minsf + .001);
|
|
|
420 |
if (maxsf1 > 0)
|
|
|
421 |
sbg[i] = Max (sbg[i], (maxsf1/8 + (maxsf1 % 8 != 0)));
|
|
|
422 |
|
|
|
423 |
if (sbg[i] > 7)
|
|
|
424 |
sbg[i] = 7;
|
|
|
425 |
|
|
|
426 |
|
|
|
427 |
for (sfb = 0; sfb < SBPSY_s; sfb++) {
|
|
|
428 |
sf[sfb][i] += 8*sbg[i];
|
|
|
429 |
|
|
|
430 |
if (sf[sfb][i] < 0) {
|
|
|
431 |
maxrange = sfb < 6 ? maxrange1 : maxrange2;
|
|
|
432 |
|
|
|
433 |
scalefac[sfb][i]
|
|
|
434 |
= -sf[sfb][i]/ifqstep + (-sf[sfb][i]%ifqstep != 0);
|
|
|
435 |
|
|
|
436 |
if (scalefac[sfb][i] > maxrange)
|
|
|
437 |
scalefac[sfb][i] = maxrange;
|
|
|
438 |
|
|
|
439 |
if (maxover < -(sf[sfb][i] + scalefac[sfb][i]*ifqstep))
|
|
|
440 |
maxover = -(sf[sfb][i] + scalefac[sfb][i]*ifqstep);
|
|
|
441 |
}
|
|
|
442 |
}
|
|
|
443 |
}
|
|
|
444 |
|
|
|
445 |
return maxover;
|
|
|
446 |
}
|
|
|
447 |
|
|
|
448 |
static int
|
|
|
449 |
compute_scalefacs_long_lsf (
|
|
|
450 |
int sf [SBPSY_l],
|
|
|
451 |
const gr_info * const cod_info,
|
|
|
452 |
int scalefac [SBPSY_l] )
|
|
|
453 |
{
|
|
|
454 |
const int * max_range = max_range_long_lsf;
|
|
|
455 |
int ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
456 |
int sfb;
|
|
|
457 |
int maxover;
|
|
|
458 |
|
|
|
459 |
|
|
|
460 |
if (cod_info->preflag) {
|
|
|
461 |
max_range = max_range_long_lsf_pretab;
|
|
|
462 |
for (sfb = 11; sfb < SBPSY_l; sfb++)
|
|
|
463 |
sf[sfb] += pretab[sfb] * ifqstep;
|
|
|
464 |
}
|
|
|
465 |
|
|
|
466 |
maxover = 0;
|
|
|
467 |
for (sfb = 0; sfb < SBPSY_l; sfb++) {
|
|
|
468 |
|
|
|
469 |
if (sf[sfb] < 0) {
|
|
|
470 |
/* ifqstep*scalefac >= -sf[sfb], so round UP */
|
|
|
471 |
scalefac[sfb] = -sf[sfb]/ifqstep + (-sf[sfb] % ifqstep != 0);
|
|
|
472 |
if (scalefac[sfb] > max_range[sfb])
|
|
|
473 |
scalefac[sfb] = max_range[sfb];
|
|
|
474 |
|
|
|
475 |
/* sf[sfb] should now be positive: */
|
|
|
476 |
if (-(sf[sfb] + scalefac[sfb]*ifqstep) > maxover) {
|
|
|
477 |
maxover = -(sf[sfb] + scalefac[sfb]*ifqstep);
|
|
|
478 |
}
|
|
|
479 |
}
|
|
|
480 |
}
|
|
|
481 |
|
|
|
482 |
return maxover;
|
|
|
483 |
}
|
|
|
484 |
|
|
|
485 |
|
|
|
486 |
/*
|
|
|
487 |
sfb=0..5 scalefac < 16
|
|
|
488 |
sfb>5 scalefac < 8
|
|
|
489 |
|
|
|
490 |
ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
491 |
ol_sf = (cod_info->global_gain-210.0);
|
|
|
492 |
ol_sf -= 8*cod_info->subblock_gain[i];
|
|
|
493 |
ol_sf -= ifqstep*scalefac[gr][ch].s[sfb][i];
|
|
|
494 |
|
|
|
495 |
*/
|
|
|
496 |
static int
|
|
|
497 |
compute_scalefacs_short(int sf[SBPSY_s][3],gr_info *cod_info,
|
|
|
498 |
int scalefac[SBPSY_s][3],int sbg[3])
|
|
|
499 |
{
|
|
|
500 |
int maxrange,maxrange1,maxrange2,maxover;
|
|
|
501 |
int sfb,i;
|
|
|
502 |
int ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
503 |
|
|
|
504 |
maxover=0;
|
|
|
505 |
maxrange1 = 15;
|
|
|
506 |
maxrange2 = 7;
|
|
|
507 |
|
|
|
508 |
|
|
|
509 |
for (i=0; i<3; ++i) {
|
|
|
510 |
int maxsf1=0,maxsf2=0,minsf=1000;
|
|
|
511 |
/* see if we should use subblock gain */
|
|
|
512 |
for ( sfb = 0; sfb < SBPSY_s; sfb++ ) {
|
|
|
513 |
if (sfb < 6) {
|
|
|
514 |
if (-sf[sfb][i]>maxsf1) maxsf1 = -sf[sfb][i];
|
|
|
515 |
} else {
|
|
|
516 |
if (-sf[sfb][i]>maxsf2) maxsf2 = -sf[sfb][i];
|
|
|
517 |
}
|
|
|
518 |
if (-sf[sfb][i]<minsf) minsf = -sf[sfb][i];
|
|
|
519 |
}
|
|
|
520 |
|
|
|
521 |
/* boost subblock gain as little as possible so we can
|
|
|
522 |
* reach maxsf1 with scalefactors
|
|
|
523 |
* 8*sbg >= maxsf1
|
|
|
524 |
*/
|
|
|
525 |
maxsf1 = Max(maxsf1-maxrange1*ifqstep,maxsf2-maxrange2*ifqstep);
|
|
|
526 |
sbg[i]=0;
|
|
|
527 |
if (minsf >0 ) sbg[i] = floor(.125*minsf + .001);
|
|
|
528 |
if (maxsf1 > 0) sbg[i] = Max(sbg[i],(maxsf1/8 + (maxsf1 % 8 != 0)));
|
|
|
529 |
if (sbg[i] > 7) sbg[i]=7;
|
|
|
530 |
|
|
|
531 |
|
|
|
532 |
for ( sfb = 0; sfb < SBPSY_s; sfb++ ) {
|
|
|
533 |
sf[sfb][i] += 8*sbg[i];
|
|
|
534 |
|
|
|
535 |
if (sf[sfb][i] < 0) {
|
|
|
536 |
maxrange = sfb < 6 ? maxrange1 : maxrange2;
|
|
|
537 |
scalefac[sfb][i]= -sf[sfb][i]/ifqstep + (-sf[sfb][i]%ifqstep != 0);
|
|
|
538 |
if (scalefac[sfb][i]>maxrange) scalefac[sfb][i]=maxrange;
|
|
|
539 |
|
|
|
540 |
if (-(sf[sfb][i] + scalefac[sfb][i]*ifqstep) >maxover) {
|
|
|
541 |
maxover=-(sf[sfb][i] + scalefac[sfb][i]*ifqstep);
|
|
|
542 |
}
|
|
|
543 |
}
|
|
|
544 |
}
|
|
|
545 |
}
|
|
|
546 |
|
|
|
547 |
return maxover;
|
|
|
548 |
}
|
|
|
549 |
|
|
|
550 |
|
|
|
551 |
|
|
|
552 |
/*
|
|
|
553 |
ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
554 |
ol_sf = (cod_info->global_gain-210.0);
|
|
|
555 |
ol_sf -= ifqstep*scalefac[gr][ch].l[sfb];
|
|
|
556 |
if (cod_info->preflag && sfb>=11)
|
|
|
557 |
ol_sf -= ifqstep*pretab[sfb];
|
|
|
558 |
*/
|
|
|
559 |
static int
|
|
|
560 |
compute_scalefacs_long(int sf[SBPSY_l],gr_info *cod_info,int scalefac[SBPSY_l])
|
|
|
561 |
{
|
|
|
562 |
int sfb;
|
|
|
563 |
int maxover;
|
|
|
564 |
int ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
565 |
|
|
|
566 |
|
|
|
567 |
if (cod_info->preflag)
|
|
|
568 |
for ( sfb = 11; sfb < SBPSY_l; sfb++ )
|
|
|
569 |
sf[sfb] += pretab[sfb]*ifqstep;
|
|
|
570 |
|
|
|
571 |
|
|
|
572 |
maxover=0;
|
|
|
573 |
for ( sfb = 0; sfb < SBPSY_l; sfb++ ) {
|
|
|
574 |
|
|
|
575 |
if (sf[sfb]<0) {
|
|
|
576 |
/* ifqstep*scalefac >= -sf[sfb], so round UP */
|
|
|
577 |
scalefac[sfb]= -sf[sfb]/ifqstep + (-sf[sfb] % ifqstep != 0);
|
|
|
578 |
if (scalefac[sfb] > max_range_long[sfb]) scalefac[sfb]=max_range_long[sfb];
|
|
|
579 |
|
|
|
580 |
/* sf[sfb] should now be positive: */
|
|
|
581 |
if ( -(sf[sfb] + scalefac[sfb]*ifqstep) > maxover) {
|
|
|
582 |
maxover = -(sf[sfb] + scalefac[sfb]*ifqstep);
|
|
|
583 |
}
|
|
|
584 |
}
|
|
|
585 |
}
|
|
|
586 |
|
|
|
587 |
return maxover;
|
|
|
588 |
}
|
|
|
589 |
|
|
|
590 |
|
|
|
591 |
|
|
|
592 |
|
|
|
593 |
|
|
|
594 |
|
|
|
595 |
|
|
|
596 |
|
|
|
597 |
/************************************************************************
|
|
|
598 |
*
|
|
|
599 |
* quantize and encode with the given scalefacs and global gain
|
|
|
600 |
*
|
|
|
601 |
* compute scalefactors, l3_enc, and return number of bits needed to encode
|
|
|
602 |
*
|
|
|
603 |
*
|
|
|
604 |
************************************************************************/
|
|
|
605 |
|
|
|
606 |
static int
|
|
|
607 |
VBR_quantize_granule(
|
|
|
608 |
lame_global_flags *gfp,
|
|
|
609 |
FLOAT8 xr34[576],
|
|
|
610 |
int l3_enc[576],
|
|
|
611 |
const III_psy_ratio * const ratio,
|
|
|
612 |
III_scalefac_t * const scalefac,
|
|
|
613 |
const int gr,
|
|
|
614 |
const int ch)
|
|
|
615 |
{
|
|
|
616 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
617 |
int status;
|
|
|
618 |
gr_info *cod_info;
|
|
|
619 |
III_side_info_t * l3_side;
|
|
|
620 |
l3_side = &gfc->l3_side;
|
|
|
621 |
cod_info = &l3_side->gr[gr].ch[ch].tt;
|
|
|
622 |
|
|
|
623 |
|
|
|
624 |
/* encode scalefacs */
|
|
|
625 |
if ( gfc->is_mpeg1 )
|
|
|
626 |
status=scale_bitcount(scalefac, cod_info);
|
|
|
627 |
else
|
|
|
628 |
status=scale_bitcount_lsf(gfc,scalefac, cod_info);
|
|
|
629 |
|
|
|
630 |
if (status!=0) {
|
|
|
631 |
return -1;
|
|
|
632 |
}
|
|
|
633 |
|
|
|
634 |
/* quantize xr34 */
|
|
|
635 |
cod_info->part2_3_length = count_bits(gfc,l3_enc,xr34,cod_info);
|
|
|
636 |
if (cod_info->part2_3_length >= LARGE_BITS) return -2;
|
|
|
637 |
cod_info->part2_3_length += cod_info->part2_length;
|
|
|
638 |
|
|
|
639 |
|
|
|
640 |
if (gfc->use_best_huffman==1) {
|
|
|
641 |
best_huffman_divide(gfc, gr, ch, cod_info, l3_enc);
|
|
|
642 |
}
|
|
|
643 |
return 0;
|
|
|
644 |
}
|
|
|
645 |
|
|
|
646 |
|
|
|
647 |
|
|
|
648 |
/***********************************************************************
|
|
|
649 |
*
|
|
|
650 |
* calc_short_block_vbr_sf()
|
|
|
651 |
* calc_long_block_vbr_sf()
|
|
|
652 |
*
|
|
|
653 |
* Mark Taylor 2000-??-??
|
|
|
654 |
* Robert Hegemann 2000-10-25 made functions of it
|
|
|
655 |
*
|
|
|
656 |
***********************************************************************/
|
|
|
657 |
static const int MAX_SF_DELTA = 4;
|
|
|
658 |
|
|
|
659 |
static int
|
|
|
660 |
short_block_vbr_sf (
|
|
|
661 |
const lame_internal_flags * const gfc,
|
|
|
662 |
const III_psy_xmin * const l3_xmin,
|
|
|
663 |
const FLOAT8 xr34_orig[576],
|
|
|
664 |
const FLOAT8 xr34 [576],
|
|
|
665 |
III_scalefac_t * const vbrsf )
|
|
|
666 |
{
|
|
|
667 |
int j, sfb, b;
|
|
|
668 |
int vbrmax = -10000; /* initialize for maximum search */
|
|
|
669 |
|
|
|
670 |
for (j = 0, sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
671 |
for (b = 0; b < 3; b++) {
|
|
|
672 |
const int start = gfc->scalefac_band.s[ sfb ];
|
|
|
673 |
const int end = gfc->scalefac_band.s[ sfb+1 ];
|
|
|
674 |
const int width = end - start;
|
|
|
675 |
|
|
|
676 |
vbrsf->s[sfb][b] = find_scalefac_ave (&xr34[j], &xr34_orig[j],
|
|
|
677 |
sfb, l3_xmin->s[sfb][b], width);
|
|
|
678 |
j += width;
|
|
|
679 |
}
|
|
|
680 |
}
|
|
|
681 |
|
|
|
682 |
for (sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
683 |
for (b = 0; b < 3; b++) {
|
|
|
684 |
if (sfb > 0)
|
|
|
685 |
if (vbrsf->s[sfb][b] > vbrsf->s[sfb-1][b]+MAX_SF_DELTA)
|
|
|
686 |
vbrsf->s[sfb][b] = vbrsf->s[sfb-1][b]+MAX_SF_DELTA;
|
|
|
687 |
if (sfb < SBMAX_s-1)
|
|
|
688 |
if (vbrsf->s[sfb][b] > vbrsf->s[sfb+1][b]+MAX_SF_DELTA)
|
|
|
689 |
vbrsf->s[sfb][b] = vbrsf->s[sfb+1][b]+MAX_SF_DELTA;
|
|
|
690 |
if (vbrmax < vbrsf->s[sfb][b])
|
|
|
691 |
vbrmax = vbrsf->s[sfb][b];
|
|
|
692 |
}
|
|
|
693 |
}
|
|
|
694 |
|
|
|
695 |
return vbrmax;
|
|
|
696 |
}
|
|
|
697 |
|
|
|
698 |
|
|
|
699 |
|
|
|
700 |
static int
|
|
|
701 |
long_block_vbr_sf (
|
|
|
702 |
const lame_internal_flags * const gfc,
|
|
|
703 |
const III_psy_xmin * const l3_xmin,
|
|
|
704 |
const FLOAT8 xr34_orig[576],
|
|
|
705 |
const FLOAT8 xr34 [576],
|
|
|
706 |
III_scalefac_t * const vbrsf )
|
|
|
707 |
{
|
|
|
708 |
int sfb;
|
|
|
709 |
int vbrmax = -10000; /* initialize for maximum search */
|
|
|
710 |
|
|
|
711 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
712 |
const int start = gfc->scalefac_band.l[ sfb ];
|
|
|
713 |
const int end = gfc->scalefac_band.l[ sfb+1 ];
|
|
|
714 |
const int width = end - start;
|
|
|
715 |
|
|
|
716 |
vbrsf->l[sfb] = find_scalefac_ave (&xr34[start], &xr34_orig[start],
|
|
|
717 |
sfb, l3_xmin->l[sfb], width);
|
|
|
718 |
}
|
|
|
719 |
|
|
|
720 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
721 |
if (sfb > 0)
|
|
|
722 |
if (vbrsf->l[sfb] > vbrsf->l[sfb-1]+MAX_SF_DELTA)
|
|
|
723 |
vbrsf->l[sfb] = vbrsf->l[sfb-1]+MAX_SF_DELTA;
|
|
|
724 |
if (sfb < SBMAX_l-1)
|
|
|
725 |
if (vbrsf->l[sfb] > vbrsf->l[sfb+1]+MAX_SF_DELTA)
|
|
|
726 |
vbrsf->l[sfb] = vbrsf->l[sfb+1]+MAX_SF_DELTA;
|
|
|
727 |
if (vbrmax < vbrsf->l[sfb])
|
|
|
728 |
vbrmax = vbrsf->l[sfb];
|
|
|
729 |
}
|
|
|
730 |
|
|
|
731 |
return vbrmax;
|
|
|
732 |
}
|
|
|
733 |
|
|
|
734 |
|
|
|
735 |
/* a variation for vbr-mtrh */
|
|
|
736 |
static int
|
|
|
737 |
short_block_sf (
|
|
|
738 |
const lame_internal_flags * const gfc,
|
|
|
739 |
const III_psy_xmin * const l3_xmin,
|
|
|
740 |
const FLOAT8 xr34_orig[576],
|
|
|
741 |
const FLOAT8 xr34 [576],
|
|
|
742 |
III_scalefac_t * const vbrsf )
|
|
|
743 |
{
|
|
|
744 |
int j, sfb, b;
|
|
|
745 |
int vbrmean, vbrmin, vbrmax;
|
|
|
746 |
int sf_cache[SBMAX_s];
|
|
|
747 |
|
|
|
748 |
for (j = 0, sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
749 |
for (b = 0; b < 3; b++) {
|
|
|
750 |
const int start = gfc->scalefac_band.s[ sfb ];
|
|
|
751 |
const int end = gfc->scalefac_band.s[ sfb+1 ];
|
|
|
752 |
const int width = end - start;
|
|
|
753 |
|
|
|
754 |
if (0 == gfc->noise_shaping_amp) {
|
|
|
755 |
/* the faster and sloppier mode to use at lower quality
|
|
|
756 |
*/
|
|
|
757 |
vbrsf->s[sfb][b] = find_scalefac (&xr34[j], &xr34_orig[j], sfb,
|
|
|
758 |
l3_xmin->s[sfb][b], width);
|
|
|
759 |
}
|
|
|
760 |
else {
|
|
|
761 |
/* the slower and better mode to use at higher quality
|
|
|
762 |
*/
|
|
|
763 |
vbrsf->s[sfb][b] = find_scalefac_ave (&xr34[j], &xr34_orig[j],
|
|
|
764 |
sfb, l3_xmin->s[sfb][b], width);
|
|
|
765 |
}
|
|
|
766 |
j += width;
|
|
|
767 |
}
|
|
|
768 |
}
|
|
|
769 |
|
|
|
770 |
vbrmax = -10000;
|
|
|
771 |
|
|
|
772 |
for (b = 0; b < 3; b++) {
|
|
|
773 |
|
|
|
774 |
/* make working copy, select_kth_int will reorder!
|
|
|
775 |
*/
|
|
|
776 |
for (sfb = 0; sfb < SBMAX_s; sfb++)
|
|
|
777 |
sf_cache[sfb] = vbrsf->s[sfb][b];
|
|
|
778 |
|
|
|
779 |
/* find median value, take it as mean
|
|
|
780 |
*/
|
|
|
781 |
vbrmean = select_kth_int (sf_cache, SBMAX_s, (SBMAX_s+1)/2);
|
|
|
782 |
|
|
|
783 |
/* get min value
|
|
|
784 |
*/
|
|
|
785 |
vbrmin = 10000;
|
|
|
786 |
for (sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
787 |
if (vbrmin > vbrsf->s[sfb][b])
|
|
|
788 |
vbrmin = vbrsf->s[sfb][b];
|
|
|
789 |
}
|
|
|
790 |
|
|
|
791 |
/* patch sfb12
|
|
|
792 |
*/
|
|
|
793 |
vbrsf->s[SBPSY_s][b] = Min (vbrsf->s[SBPSY_s][b], vbrmean);
|
|
|
794 |
vbrsf->s[SBPSY_s][b] = Max (vbrsf->s[SBPSY_s][b], vbrmin-(vbrmean-vbrmin));
|
|
|
795 |
|
|
|
796 |
/* cut peaks
|
|
|
797 |
*/
|
|
|
798 |
for (sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
799 |
if (vbrsf->s[sfb][b] > vbrmean+(vbrmean-vbrmin))
|
|
|
800 |
vbrsf->s[sfb][b] = vbrmean+(vbrmean-vbrmin);
|
|
|
801 |
}
|
|
|
802 |
|
|
|
803 |
/* get max value
|
|
|
804 |
*/
|
|
|
805 |
for (sfb = 0; sfb < SBMAX_s; sfb++) {
|
|
|
806 |
if (vbrmax < vbrsf->s[sfb][b])
|
|
|
807 |
vbrmax = vbrsf->s[sfb][b];
|
|
|
808 |
}
|
|
|
809 |
}
|
|
|
810 |
|
|
|
811 |
return vbrmax;
|
|
|
812 |
}
|
|
|
813 |
|
|
|
814 |
|
|
|
815 |
/* a variation for vbr-mtrh */
|
|
|
816 |
static int
|
|
|
817 |
long_block_sf (
|
|
|
818 |
const lame_internal_flags * const gfc,
|
|
|
819 |
const III_psy_xmin * const l3_xmin,
|
|
|
820 |
const FLOAT8 xr34_orig[576],
|
|
|
821 |
const FLOAT8 xr34 [576],
|
|
|
822 |
III_scalefac_t * const vbrsf )
|
|
|
823 |
{
|
|
|
824 |
int sfb;
|
|
|
825 |
int vbrmean, vbrmin, vbrmax;
|
|
|
826 |
int sf_cache[SBMAX_l];
|
|
|
827 |
|
|
|
828 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
829 |
const int start = gfc->scalefac_band.l[ sfb ];
|
|
|
830 |
const int end = gfc->scalefac_band.l[ sfb+1 ];
|
|
|
831 |
const int width = end - start;
|
|
|
832 |
|
|
|
833 |
if (0 == gfc->noise_shaping_amp) {
|
|
|
834 |
/* the faster and sloppier mode to use at lower quality
|
|
|
835 |
*/
|
|
|
836 |
vbrsf->l[sfb] = find_scalefac (&xr34[start], &xr34_orig[start],
|
|
|
837 |
sfb, l3_xmin->l[sfb], width);
|
|
|
838 |
}
|
|
|
839 |
else {
|
|
|
840 |
/* the slower and better mode to use at higher quality
|
|
|
841 |
*/
|
|
|
842 |
vbrsf->l[sfb] = find_scalefac_ave (&xr34[start], &xr34_orig[start],
|
|
|
843 |
sfb, l3_xmin->l[sfb], width);
|
|
|
844 |
}
|
|
|
845 |
}
|
|
|
846 |
|
|
|
847 |
/* make working copy, select_kth_int will reorder!
|
|
|
848 |
*/
|
|
|
849 |
for (sfb = 0; sfb < SBMAX_l; sfb++)
|
|
|
850 |
sf_cache[sfb] = vbrsf->l[sfb];
|
|
|
851 |
|
|
|
852 |
/* find median value, take it as mean
|
|
|
853 |
*/
|
|
|
854 |
vbrmean = select_kth_int (sf_cache, SBMAX_l, (SBMAX_l+1)/2);
|
|
|
855 |
|
|
|
856 |
/* get min value
|
|
|
857 |
*/
|
|
|
858 |
vbrmin = +10000;
|
|
|
859 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
860 |
if (vbrmin > vbrsf->l[sfb])
|
|
|
861 |
vbrmin = vbrsf->l[sfb];
|
|
|
862 |
}
|
|
|
863 |
|
|
|
864 |
/* patch sfb21
|
|
|
865 |
*/
|
|
|
866 |
vbrsf->l[SBPSY_l] = Min (vbrsf->l[SBPSY_l], vbrmean);
|
|
|
867 |
vbrsf->l[SBPSY_l] = Max (vbrsf->l[SBPSY_l], vbrmin-(vbrmean-vbrmin));
|
|
|
868 |
|
|
|
869 |
/* cut peaks
|
|
|
870 |
*/
|
|
|
871 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
872 |
if (vbrsf->l[sfb] > vbrmean+(vbrmean-vbrmin))
|
|
|
873 |
vbrsf->l[sfb] = vbrmean+(vbrmean-vbrmin);
|
|
|
874 |
}
|
|
|
875 |
|
|
|
876 |
/* get max value
|
|
|
877 |
*/
|
|
|
878 |
vbrmax = -10000;
|
|
|
879 |
for (sfb = 0; sfb < SBMAX_l; sfb++) {
|
|
|
880 |
if (vbrmax < vbrsf->l[sfb])
|
|
|
881 |
vbrmax = vbrsf->l[sfb];
|
|
|
882 |
}
|
|
|
883 |
|
|
|
884 |
return vbrmax;
|
|
|
885 |
}
|
|
|
886 |
|
|
|
887 |
|
|
|
888 |
|
|
|
889 |
/******************************************************************
|
|
|
890 |
*
|
|
|
891 |
* short block scalefacs
|
|
|
892 |
*
|
|
|
893 |
******************************************************************/
|
|
|
894 |
|
|
|
895 |
static void
|
|
|
896 |
short_block_scalefacs (
|
|
|
897 |
lame_global_flags *gfp,
|
|
|
898 |
gr_info * const cod_info,
|
|
|
899 |
III_scalefac_t * const scalefac,
|
|
|
900 |
III_scalefac_t * const vbrsf,
|
|
|
901 |
int * const VBRmax )
|
|
|
902 |
{
|
|
|
903 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
904 |
const int * max_range;
|
|
|
905 |
int sfb, b;
|
|
|
906 |
int maxover, maxover0, maxover1, mover;
|
|
|
907 |
int v0, v1;
|
|
|
908 |
int minsfb;
|
|
|
909 |
int vbrmax = *VBRmax;
|
|
|
910 |
|
|
|
911 |
max_range = gfc->is_mpeg1 ? max_range_short : max_range_short_lsf;
|
|
|
912 |
|
|
|
913 |
maxover0 = 0;
|
|
|
914 |
maxover1 = 0;
|
|
|
915 |
for (sfb = 0; sfb < SBPSY_s; sfb++) {
|
|
|
916 |
for (b = 0; b < 3; b++) {
|
|
|
917 |
v0 = (vbrmax - vbrsf->s[sfb][b]) - (4*14 + 2*max_range[sfb]);
|
|
|
918 |
v1 = (vbrmax - vbrsf->s[sfb][b]) - (4*14 + 4*max_range[sfb]);
|
|
|
919 |
if (maxover0 < v0)
|
|
|
920 |
maxover0 = v0;
|
|
|
921 |
if (maxover1 < v1)
|
|
|
922 |
maxover1 = v1;
|
|
|
923 |
}
|
|
|
924 |
}
|
|
|
925 |
|
|
|
926 |
if (gfc->noise_shaping == 2)
|
|
|
927 |
/* allow scalefac_scale=1 */
|
|
|
928 |
mover = Min (maxover0, maxover1);
|
|
|
929 |
else
|
|
|
930 |
mover = maxover0;
|
|
|
931 |
|
|
|
932 |
vbrmax -= mover;
|
|
|
933 |
maxover0 -= mover;
|
|
|
934 |
maxover1 -= mover;
|
|
|
935 |
|
|
|
936 |
if (maxover0 == 0)
|
|
|
937 |
cod_info->scalefac_scale = 0;
|
|
|
938 |
else if (maxover1 == 0)
|
|
|
939 |
cod_info->scalefac_scale = 1;
|
|
|
940 |
|
|
|
941 |
/* sf = (cod_info->global_gain-210.0) */
|
|
|
942 |
cod_info->global_gain = vbrmax + 210;
|
|
|
943 |
assert(cod_info->global_gain < 256);
|
|
|
944 |
|
|
|
945 |
if (vbr_mtrh == gfp->VBR && cod_info->global_gain > 1) {
|
|
|
946 |
/* just to be safe, reduce global_gain by one
|
|
|
947 |
*/
|
|
|
948 |
cod_info->global_gain -= 1;
|
|
|
949 |
}
|
|
|
950 |
|
|
|
951 |
if (cod_info->global_gain > 255)
|
|
|
952 |
cod_info->global_gain = 255;
|
|
|
953 |
|
|
|
954 |
for (sfb = 0; sfb < SBPSY_s; sfb++) {
|
|
|
955 |
for (b = 0; b < 3; b++) {
|
|
|
956 |
vbrsf->s[sfb][b] -= vbrmax;
|
|
|
957 |
}
|
|
|
958 |
}
|
|
|
959 |
if ( gfc->is_mpeg1 )
|
|
|
960 |
maxover = compute_scalefacs_short (vbrsf->s, cod_info, scalefac->s,
|
|
|
961 |
cod_info->subblock_gain);
|
|
|
962 |
else
|
|
|
963 |
maxover = compute_scalefacs_short_lsf (vbrsf->s, cod_info, scalefac->s,
|
|
|
964 |
cod_info->subblock_gain);
|
|
|
965 |
|
|
|
966 |
assert (maxover <= 0);
|
|
|
967 |
|
|
|
968 |
/* adjust global_gain so at least 1 subblock gain = 0 */
|
|
|
969 |
minsfb = 999; /* prepare for minimum search */
|
|
|
970 |
for (b = 0; b < 3; b++)
|
|
|
971 |
if (minsfb > cod_info->subblock_gain[b])
|
|
|
972 |
minsfb = cod_info->subblock_gain[b];
|
|
|
973 |
|
|
|
974 |
if (minsfb > cod_info->global_gain/8)
|
|
|
975 |
minsfb = cod_info->global_gain/8;
|
|
|
976 |
|
|
|
977 |
vbrmax -= 8*minsfb;
|
|
|
978 |
cod_info->global_gain -= 8*minsfb;
|
|
|
979 |
|
|
|
980 |
for (b = 0; b < 3; b++)
|
|
|
981 |
cod_info->subblock_gain[b] -= minsfb;
|
|
|
982 |
|
|
|
983 |
*VBRmax = vbrmax;
|
|
|
984 |
}
|
|
|
985 |
|
|
|
986 |
|
|
|
987 |
|
|
|
988 |
/******************************************************************
|
|
|
989 |
*
|
|
|
990 |
* long block scalefacs
|
|
|
991 |
*
|
|
|
992 |
******************************************************************/
|
|
|
993 |
|
|
|
994 |
static void
|
|
|
995 |
long_block_scalefacs (
|
|
|
996 |
lame_global_flags *gfp,
|
|
|
997 |
gr_info * const cod_info,
|
|
|
998 |
III_scalefac_t * const scalefac,
|
|
|
999 |
III_scalefac_t * const vbrsf,
|
|
|
1000 |
int * const VBRmax )
|
|
|
1001 |
{
|
|
|
1002 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
1003 |
const int * max_range;
|
|
|
1004 |
const int * max_rangep;
|
|
|
1005 |
int sfb;
|
|
|
1006 |
int maxover, maxover0, maxover1, maxover0p, maxover1p, mover;
|
|
|
1007 |
int v0, v1, v0p, v1p;
|
|
|
1008 |
int vbrmax = *VBRmax;
|
|
|
1009 |
|
|
|
1010 |
max_range = gfc->is_mpeg1 ? max_range_long : max_range_long_lsf;
|
|
|
1011 |
max_rangep = gfc->is_mpeg1 ? max_range_long : max_range_long_lsf_pretab;
|
|
|
1012 |
|
|
|
1013 |
maxover0 = 0;
|
|
|
1014 |
maxover1 = 0;
|
|
|
1015 |
maxover0p = 0; /* pretab */
|
|
|
1016 |
maxover1p = 0; /* pretab */
|
|
|
1017 |
|
|
|
1018 |
for ( sfb = 0; sfb < SBPSY_l; sfb++ ) {
|
|
|
1019 |
v0 = (vbrmax - vbrsf->l[sfb]) - 2*max_range[sfb];
|
|
|
1020 |
v1 = (vbrmax - vbrsf->l[sfb]) - 4*max_range[sfb];
|
|
|
1021 |
v0p = (vbrmax - vbrsf->l[sfb]) - 2*(max_rangep[sfb]+pretab[sfb]);
|
|
|
1022 |
v1p = (vbrmax - vbrsf->l[sfb]) - 4*(max_rangep[sfb]+pretab[sfb]);
|
|
|
1023 |
if (maxover0 < v0)
|
|
|
1024 |
maxover0 = v0;
|
|
|
1025 |
if (maxover1 < v1)
|
|
|
1026 |
maxover1 = v1;
|
|
|
1027 |
if (maxover0p < v0p)
|
|
|
1028 |
maxover0p = v0p;
|
|
|
1029 |
if (maxover1p < v1p)
|
|
|
1030 |
maxover1p = v1p;
|
|
|
1031 |
}
|
|
|
1032 |
|
|
|
1033 |
mover = Min (maxover0, maxover0p);
|
|
|
1034 |
if (gfc->noise_shaping == 2) {
|
|
|
1035 |
/* allow scalefac_scale=1 */
|
|
|
1036 |
mover = Min (mover, maxover1);
|
|
|
1037 |
mover = Min (mover, maxover1p);
|
|
|
1038 |
}
|
|
|
1039 |
|
|
|
1040 |
vbrmax -= mover;
|
|
|
1041 |
maxover0 -= mover;
|
|
|
1042 |
maxover0p -= mover;
|
|
|
1043 |
maxover1 -= mover;
|
|
|
1044 |
maxover1p -= mover;
|
|
|
1045 |
|
|
|
1046 |
if (maxover0 <= 0) {
|
|
|
1047 |
cod_info->scalefac_scale = 0;
|
|
|
1048 |
cod_info->preflag = 0;
|
|
|
1049 |
vbrmax -= maxover0;
|
|
|
1050 |
} else if (maxover0p <= 0) {
|
|
|
1051 |
cod_info->scalefac_scale = 0;
|
|
|
1052 |
cod_info->preflag = 1;
|
|
|
1053 |
vbrmax -= maxover0p;
|
|
|
1054 |
} else if (maxover1 == 0) {
|
|
|
1055 |
cod_info->scalefac_scale = 1;
|
|
|
1056 |
cod_info->preflag = 0;
|
|
|
1057 |
} else if (maxover1p == 0) {
|
|
|
1058 |
cod_info->scalefac_scale = 1;
|
|
|
1059 |
cod_info->preflag = 1;
|
|
|
1060 |
} else {
|
|
|
1061 |
assert(0); /* this should not happen */
|
|
|
1062 |
}
|
|
|
1063 |
|
|
|
1064 |
/* sf = (cod_info->global_gain-210.0) */
|
|
|
1065 |
cod_info->global_gain = vbrmax + 210;
|
|
|
1066 |
assert (cod_info->global_gain < 256);
|
|
|
1067 |
|
|
|
1068 |
if (vbr_mtrh == gfp->VBR && cod_info->global_gain > 1) {
|
|
|
1069 |
/* just to be safe, reduce global gain by one
|
|
|
1070 |
*/
|
|
|
1071 |
cod_info->global_gain -= 1;
|
|
|
1072 |
}
|
|
|
1073 |
|
|
|
1074 |
if (cod_info->global_gain > 255)
|
|
|
1075 |
cod_info->global_gain = 255;
|
|
|
1076 |
|
|
|
1077 |
for (sfb = 0; sfb < SBPSY_l; sfb++)
|
|
|
1078 |
vbrsf->l[sfb] -= vbrmax;
|
|
|
1079 |
|
|
|
1080 |
if ( gfc->is_mpeg1 == 1 )
|
|
|
1081 |
maxover = compute_scalefacs_long (vbrsf->l, cod_info, scalefac->l);
|
|
|
1082 |
else
|
|
|
1083 |
maxover = compute_scalefacs_long_lsf (vbrsf->l, cod_info, scalefac->l);
|
|
|
1084 |
|
|
|
1085 |
assert (maxover <= 0);
|
|
|
1086 |
|
|
|
1087 |
*VBRmax = vbrmax;
|
|
|
1088 |
}
|
|
|
1089 |
|
|
|
1090 |
|
|
|
1091 |
|
|
|
1092 |
/***********************************************************************
|
|
|
1093 |
*
|
|
|
1094 |
* calc_fac()
|
|
|
1095 |
*
|
|
|
1096 |
* Mark Taylor 2000-??-??
|
|
|
1097 |
* Robert Hegemann 2000-10-20 made functions of it
|
|
|
1098 |
*
|
|
|
1099 |
***********************************************************************/
|
|
|
1100 |
|
|
|
1101 |
static FLOAT8 calc_fac ( const int ifac )
|
|
|
1102 |
{
|
|
|
1103 |
if (ifac+210 < Q_MAX)
|
|
|
1104 |
return 1/IPOW20 (ifac+210);
|
|
|
1105 |
else
|
|
|
1106 |
return pow (2.0, 0.75*ifac/4.0);
|
|
|
1107 |
}
|
|
|
1108 |
|
|
|
1109 |
|
|
|
1110 |
|
|
|
1111 |
/***********************************************************************
|
|
|
1112 |
*
|
|
|
1113 |
* quantize xr34 based on scalefactors
|
|
|
1114 |
*
|
|
|
1115 |
* calc_short_block_xr34
|
|
|
1116 |
* calc_long_block_xr34
|
|
|
1117 |
*
|
|
|
1118 |
* Mark Taylor 2000-??-??
|
|
|
1119 |
* Robert Hegemann 2000-10-20 made functions of them
|
|
|
1120 |
*
|
|
|
1121 |
***********************************************************************/
|
|
|
1122 |
|
|
|
1123 |
static void
|
|
|
1124 |
short_block_xr34 (
|
|
|
1125 |
const lame_internal_flags * const gfc,
|
|
|
1126 |
const gr_info * const cod_info,
|
|
|
1127 |
const III_scalefac_t * const scalefac,
|
|
|
1128 |
const FLOAT8 xr34_orig[576],
|
|
|
1129 |
FLOAT8 xr34 [576] )
|
|
|
1130 |
{
|
|
|
1131 |
int sfb, l, j, b;
|
|
|
1132 |
int ifac, ifqstep, start, end;
|
|
|
1133 |
FLOAT8 fac;
|
|
|
1134 |
|
|
|
1135 |
/* even though there is no scalefactor for sfb12
|
|
|
1136 |
* subblock gain affects upper frequencies too, that's why
|
|
|
1137 |
* we have to go up to SBMAX_s
|
|
|
1138 |
*/
|
|
|
1139 |
ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
1140 |
for ( j = 0, sfb = 0; sfb < SBMAX_s; sfb++ ) {
|
|
|
1141 |
start = gfc->scalefac_band.s[ sfb ];
|
|
|
1142 |
end = gfc->scalefac_band.s[ sfb+1 ];
|
|
|
1143 |
for (b = 0; b < 3; b++) {
|
|
|
1144 |
ifac = 8*cod_info->subblock_gain[b]+ifqstep*scalefac->s[sfb][b];
|
|
|
1145 |
fac = calc_fac( ifac );
|
|
|
1146 |
/*
|
|
|
1147 |
* loop unrolled into "Duff's Device". Robert Hegemann
|
|
|
1148 |
*/
|
|
|
1149 |
l = (end-start+7) / 8;
|
|
|
1150 |
switch ((end-start) % 8) {
|
|
|
1151 |
default:
|
|
|
1152 |
case 0: do{ xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1153 |
case 7: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1154 |
case 6: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1155 |
case 5: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1156 |
case 4: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1157 |
case 3: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1158 |
case 2: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1159 |
case 1: xr34[j] = xr34_orig[j]*fac; j++; } while (--l);
|
|
|
1160 |
}
|
|
|
1161 |
}
|
|
|
1162 |
}
|
|
|
1163 |
}
|
|
|
1164 |
|
|
|
1165 |
|
|
|
1166 |
|
|
|
1167 |
static void
|
|
|
1168 |
long_block_xr34 (
|
|
|
1169 |
const lame_internal_flags * const gfc,
|
|
|
1170 |
const gr_info * const cod_info,
|
|
|
1171 |
const III_scalefac_t * const scalefac,
|
|
|
1172 |
const FLOAT8 xr34_orig[576],
|
|
|
1173 |
FLOAT8 xr34 [576] )
|
|
|
1174 |
{
|
|
|
1175 |
int sfb, l, j;
|
|
|
1176 |
int ifac, ifqstep, start, end;
|
|
|
1177 |
FLOAT8 fac;
|
|
|
1178 |
|
|
|
1179 |
ifqstep = ( cod_info->scalefac_scale == 0 ) ? 2 : 4;
|
|
|
1180 |
for ( sfb = 0; sfb < SBMAX_l; sfb++ ) {
|
|
|
1181 |
|
|
|
1182 |
ifac = ifqstep*scalefac->l[sfb];
|
|
|
1183 |
if (cod_info->preflag)
|
|
|
1184 |
ifac += ifqstep*pretab[sfb];
|
|
|
1185 |
|
|
|
1186 |
fac = calc_fac( ifac );
|
|
|
1187 |
|
|
|
1188 |
start = gfc->scalefac_band.l[ sfb ];
|
|
|
1189 |
end = gfc->scalefac_band.l[ sfb+1 ];
|
|
|
1190 |
/*
|
|
|
1191 |
* loop unrolled into "Duff's Device". Robert Hegemann
|
|
|
1192 |
*/
|
|
|
1193 |
j = start;
|
|
|
1194 |
l = (end-start+7) / 8;
|
|
|
1195 |
switch ((end-start) % 8) {
|
|
|
1196 |
default:
|
|
|
1197 |
case 0: do{ xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1198 |
case 7: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1199 |
case 6: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1200 |
case 5: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1201 |
case 4: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1202 |
case 3: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1203 |
case 2: xr34[j] = xr34_orig[j]*fac; j++;
|
|
|
1204 |
case 1: xr34[j] = xr34_orig[j]*fac; j++; } while (--l);
|
|
|
1205 |
}
|
|
|
1206 |
}
|
|
|
1207 |
}
|
|
|
1208 |
|
|
|
1209 |
|
|
|
1210 |
|
|
|
1211 |
|
|
|
1212 |
|
|
|
1213 |
|
|
|
1214 |
|
|
|
1215 |
|
|
|
1216 |
|
|
|
1217 |
/************************************************************************
|
|
|
1218 |
*
|
|
|
1219 |
* VBR_noise_shaping()
|
|
|
1220 |
*
|
|
|
1221 |
* compute scalefactors, l3_enc, and return number of bits needed to encode
|
|
|
1222 |
*
|
|
|
1223 |
* return code: 0 scalefactors were found with all noise < masking
|
|
|
1224 |
*
|
|
|
1225 |
* n>0 scalefactors required too many bits. global gain
|
|
|
1226 |
* was decreased by n
|
|
|
1227 |
* If n is large, we should probably recompute scalefacs
|
|
|
1228 |
* with a lower quality.
|
|
|
1229 |
*
|
|
|
1230 |
* n<0 scalefactors used less than minbits.
|
|
|
1231 |
* global gain was increased by n.
|
|
|
1232 |
* If n is large, might want to recompute scalefacs
|
|
|
1233 |
* with a higher quality setting?
|
|
|
1234 |
*
|
|
|
1235 |
************************************************************************/
|
|
|
1236 |
static int
|
|
|
1237 |
VBR_noise_shaping (
|
|
|
1238 |
lame_global_flags *gfp,
|
|
|
1239 |
FLOAT8 xr [576],
|
|
|
1240 |
FLOAT8 xr34orig [576],
|
|
|
1241 |
III_psy_ratio *ratio,
|
|
|
1242 |
int l3_enc [576],
|
|
|
1243 |
int digital_silence,
|
|
|
1244 |
int minbits,
|
|
|
1245 |
int maxbits,
|
|
|
1246 |
III_scalefac_t *scalefac,
|
|
|
1247 |
III_psy_xmin *l3_xmin,
|
|
|
1248 |
int gr,
|
|
|
1249 |
int ch )
|
|
|
1250 |
{
|
|
|
1251 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
1252 |
III_scalefac_t save_sf;
|
|
|
1253 |
III_scalefac_t vbrsf;
|
|
|
1254 |
gr_info *cod_info;
|
|
|
1255 |
FLOAT8 xr34[576];
|
|
|
1256 |
int shortblock;
|
|
|
1257 |
int vbrmax;
|
|
|
1258 |
int global_gain_adjust = 0;
|
|
|
1259 |
|
|
|
1260 |
cod_info = &gfc->l3_side.gr[gr].ch[ch].tt;
|
|
|
1261 |
shortblock = (cod_info->block_type == SHORT_TYPE);
|
|
|
1262 |
|
|
|
1263 |
if (shortblock)
|
|
|
1264 |
vbrmax = short_block_vbr_sf (gfc, l3_xmin, xr34orig, xr, &vbrsf);
|
|
|
1265 |
else
|
|
|
1266 |
vbrmax = long_block_vbr_sf (gfc, l3_xmin, xr34orig, xr, &vbrsf);
|
|
|
1267 |
|
|
|
1268 |
/* save a copy of vbrsf, incase we have to recomptue scalefacs */
|
|
|
1269 |
memcpy (&save_sf, &vbrsf, sizeof(III_scalefac_t));
|
|
|
1270 |
|
|
|
1271 |
do {
|
|
|
1272 |
memset (scalefac, 0, sizeof(III_scalefac_t));
|
|
|
1273 |
|
|
|
1274 |
if (shortblock) {
|
|
|
1275 |
short_block_scalefacs (gfp, cod_info, scalefac, &vbrsf, &vbrmax);
|
|
|
1276 |
short_block_xr34 (gfc, cod_info, scalefac, xr34orig, xr34);
|
|
|
1277 |
} else {
|
|
|
1278 |
long_block_scalefacs (gfp, cod_info, scalefac, &vbrsf, &vbrmax);
|
|
|
1279 |
long_block_xr34 (gfc, cod_info, scalefac, xr34orig, xr34);
|
|
|
1280 |
}
|
|
|
1281 |
VBR_quantize_granule (gfp, xr34, l3_enc, ratio, scalefac, gr, ch);
|
|
|
1282 |
|
|
|
1283 |
|
|
|
1284 |
/* decrease noise until we use at least minbits
|
|
|
1285 |
*/
|
|
|
1286 |
if (cod_info->part2_3_length < minbits) {
|
|
|
1287 |
if (digital_silence) break;
|
|
|
1288 |
//if (cod_info->part2_3_length == cod_info->part2_length) break;
|
|
|
1289 |
if (vbrmax+210 == 0) break;
|
|
|
1290 |
|
|
|
1291 |
/* decrease global gain, recompute scale factors */
|
|
|
1292 |
--vbrmax;
|
|
|
1293 |
--global_gain_adjust;
|
|
|
1294 |
memcpy (&vbrsf, &save_sf, sizeof(III_scalefac_t));
|
|
|
1295 |
}
|
|
|
1296 |
|
|
|
1297 |
} while (cod_info->part2_3_length < minbits);
|
|
|
1298 |
|
|
|
1299 |
/* inject noise until we meet our bit limit
|
|
|
1300 |
*/
|
|
|
1301 |
while (cod_info->part2_3_length > Min (maxbits, MAX_BITS)) {
|
|
|
1302 |
/* increase global gain, keep existing scale factors */
|
|
|
1303 |
++cod_info->global_gain;
|
|
|
1304 |
if (cod_info->global_gain > 255)
|
|
|
1305 |
ERRORF (gfc,"%ld impossible to encode ??? frame! bits=%d\n",
|
|
|
1306 |
// gfp->frameNum, cod_info->part2_3_length);
|
|
|
1307 |
-1, cod_info->part2_3_length);
|
|
|
1308 |
VBR_quantize_granule (gfp, xr34, l3_enc, ratio, scalefac, gr, ch);
|
|
|
1309 |
|
|
|
1310 |
++global_gain_adjust;
|
|
|
1311 |
}
|
|
|
1312 |
|
|
|
1313 |
return global_gain_adjust;
|
|
|
1314 |
}
|
|
|
1315 |
|
|
|
1316 |
|
|
|
1317 |
|
|
|
1318 |
/************************************************************************
|
|
|
1319 |
*
|
|
|
1320 |
* VBR_noise_shaping2()
|
|
|
1321 |
*
|
|
|
1322 |
* may result in a need of too many bits, then do it CBR like
|
|
|
1323 |
*
|
|
|
1324 |
* Robert Hegemann 2000-10-25
|
|
|
1325 |
*
|
|
|
1326 |
***********************************************************************/
|
|
|
1327 |
|
|
|
1328 |
int
|
|
|
1329 |
VBR_noise_shaping2 (
|
|
|
1330 |
lame_global_flags *gfp,
|
|
|
1331 |
FLOAT8 xr [576],
|
|
|
1332 |
FLOAT8 xr34orig [576],
|
|
|
1333 |
III_psy_ratio * const ratio,
|
|
|
1334 |
int l3_enc [576],
|
|
|
1335 |
int digital_silence,
|
|
|
1336 |
int minbits,
|
|
|
1337 |
int maxbits,
|
|
|
1338 |
III_scalefac_t * const scalefac,
|
|
|
1339 |
III_psy_xmin * const l3_xmin,
|
|
|
1340 |
int gr,
|
|
|
1341 |
int ch )
|
|
|
1342 |
{
|
|
|
1343 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
1344 |
III_scalefac_t vbrsf;
|
|
|
1345 |
gr_info *cod_info;
|
|
|
1346 |
FLOAT8 xr34[576];
|
|
|
1347 |
int shortblock, ret, bits, huffbits;
|
|
|
1348 |
int vbrmax, best_huffman = gfc->use_best_huffman;
|
|
|
1349 |
|
|
|
1350 |
cod_info = &gfc->l3_side.gr[gr].ch[ch].tt;
|
|
|
1351 |
shortblock = (cod_info->block_type == SHORT_TYPE);
|
|
|
1352 |
|
|
|
1353 |
if (shortblock) {
|
|
|
1354 |
vbrmax = short_block_sf (gfc, l3_xmin, xr34orig, xr, &vbrsf);
|
|
|
1355 |
short_block_scalefacs (gfp, cod_info, scalefac, &vbrsf, &vbrmax);
|
|
|
1356 |
short_block_xr34 (gfc, cod_info, scalefac, xr34orig, xr34);
|
|
|
1357 |
} else {
|
|
|
1358 |
vbrmax = long_block_sf (gfc, l3_xmin, xr34orig, xr, &vbrsf);
|
|
|
1359 |
long_block_scalefacs (gfp, cod_info, scalefac, &vbrsf, &vbrmax);
|
|
|
1360 |
long_block_xr34 (gfc, cod_info, scalefac, xr34orig, xr34);
|
|
|
1361 |
}
|
|
|
1362 |
|
|
|
1363 |
gfc->use_best_huffman = 0; /* we will do it later */
|
|
|
1364 |
|
|
|
1365 |
ret = VBR_quantize_granule (gfp, xr34, l3_enc, ratio, scalefac, gr, ch);
|
|
|
1366 |
|
|
|
1367 |
gfc->use_best_huffman = best_huffman;
|
|
|
1368 |
|
|
|
1369 |
if (ret == -1) /* Houston, we have a problem */
|
|
|
1370 |
return -1;
|
|
|
1371 |
|
|
|
1372 |
if (cod_info->part2_3_length < minbits) {
|
|
|
1373 |
huffbits = minbits - cod_info->part2_length;
|
|
|
1374 |
bits = bin_search_StepSize (gfc, cod_info, huffbits,
|
|
|
1375 |
gfc->OldValue[ch], xr34, l3_enc);
|
|
|
1376 |
gfc->OldValue[ch] = cod_info->global_gain;
|
|
|
1377 |
cod_info->part2_3_length = bits + cod_info->part2_length;
|
|
|
1378 |
}
|
|
|
1379 |
if (cod_info->part2_3_length > maxbits) {
|
|
|
1380 |
huffbits = maxbits - cod_info->part2_length;
|
|
|
1381 |
bits = bin_search_StepSize (gfc, cod_info, huffbits,
|
|
|
1382 |
gfc->OldValue[ch], xr34, l3_enc);
|
|
|
1383 |
gfc->OldValue[ch] = cod_info->global_gain;
|
|
|
1384 |
cod_info->part2_3_length = bits;
|
|
|
1385 |
if (bits > huffbits) {
|
|
|
1386 |
bits = inner_loop (gfc, cod_info, huffbits, xr34, l3_enc);
|
|
|
1387 |
cod_info->part2_3_length = bits;
|
|
|
1388 |
}
|
|
|
1389 |
if (bits >= LARGE_BITS) /* Houston, we have a problem */
|
|
|
1390 |
return -2;
|
|
|
1391 |
cod_info->part2_3_length += cod_info->part2_length;
|
|
|
1392 |
}
|
|
|
1393 |
|
|
|
1394 |
if (cod_info->part2_length >= LARGE_BITS) /* Houston, we have a problem */
|
|
|
1395 |
return -2;
|
|
|
1396 |
|
|
|
1397 |
assert (cod_info->global_gain < 256);
|
|
|
1398 |
|
|
|
1399 |
return 0;
|
|
|
1400 |
}
|
|
|
1401 |
|
|
|
1402 |
|
|
|
1403 |
|
|
|
1404 |
|
|
|
1405 |
void
|
|
|
1406 |
VBR_quantize(lame_global_flags *gfp,
|
|
|
1407 |
FLOAT8 pe[2][2], FLOAT8 ms_ener_ratio[2],
|
|
|
1408 |
FLOAT8 xr[2][2][576], III_psy_ratio ratio[2][2],
|
|
|
1409 |
int l3_enc[2][2][576],
|
|
|
1410 |
III_scalefac_t scalefac[2][2])
|
|
|
1411 |
{
|
|
|
1412 |
lame_internal_flags *gfc=gfp->internal_flags;
|
|
|
1413 |
III_psy_xmin l3_xmin[2][2];
|
|
|
1414 |
int minbits,maxbits,max_frame_bits,totbits,gr,ch,i,bits_ok;
|
|
|
1415 |
int bitsPerFrame,mean_bits;
|
|
|
1416 |
int analog_silence;
|
|
|
1417 |
FLOAT8 qadjust;
|
|
|
1418 |
III_side_info_t * l3_side;
|
|
|
1419 |
gr_info *cod_info;
|
|
|
1420 |
int digital_silence[2][2];
|
|
|
1421 |
FLOAT8 masking_lower_db=0;
|
|
|
1422 |
FLOAT8 xr34[2][2][576];
|
|
|
1423 |
// static const FLOAT8 dbQ[10]={-6.0,-5.0,-4.0,-3.0, -2.0, -1.0, -.25, .5, 1.25, 2.0};
|
|
|
1424 |
/* from quantize.c VBR algorithm */
|
|
|
1425 |
/*static const FLOAT8 dbQ[10]=
|
|
|
1426 |
{-5.5,-4.25,-3.0,-2.50, -1.75, -.75, -.5, -.25, .25, .75};*/
|
|
|
1427 |
/* a third dbQ table ?!? */
|
|
|
1428 |
static const FLOAT8 dbQ[10]=
|
|
|
1429 |
{-6.06,-4.4,-2.9,-1.57, -0.4, 0.61, 1.45, 2.13, 2.65, 3.0};
|
|
|
1430 |
|
|
|
1431 |
qadjust=0; /* start with -1 db quality improvement over quantize.c VBR */
|
|
|
1432 |
|
|
|
1433 |
l3_side = &gfc->l3_side;
|
|
|
1434 |
//gfc->ATHlower += (4-gfp->VBR_q)*4.0;
|
|
|
1435 |
//if (gfc->ATHlower < 0) gfc->ATHlower=0;
|
|
|
1436 |
|
|
|
1437 |
|
|
|
1438 |
/* now find out: if the frame can be considered analog silent
|
|
|
1439 |
* if each granule can be considered digital silent
|
|
|
1440 |
* and calculate l3_xmin and the fresh xr34 array
|
|
|
1441 |
*/
|
|
|
1442 |
|
|
|
1443 |
assert( gfp->VBR_q <= 9 );
|
|
|
1444 |
assert( gfp->VBR_q >= 0 );
|
|
|
1445 |
analog_silence=1;
|
|
|
1446 |
for (gr = 0; gr < gfc->mode_gr; gr++) {
|
|
|
1447 |
/* copy data to be quantized into xr */
|
|
|
1448 |
if (gfc->mode_ext==MPG_MD_MS_LR) {
|
|
|
1449 |
ms_convert(xr[gr],xr[gr]);
|
|
|
1450 |
}
|
|
|
1451 |
for (ch = 0; ch < gfc->channels_out; ch++) {
|
|
|
1452 |
/* if in the following sections the quality would not be adjusted
|
|
|
1453 |
* then we would only have to call calc_xmin once here and
|
|
|
1454 |
* could drop subsequently calls (rh 2000/07/17)
|
|
|
1455 |
*/
|
|
|
1456 |
int over_ath;
|
|
|
1457 |
cod_info = &l3_side->gr[gr].ch[ch].tt;
|
|
|
1458 |
cod_info->part2_3_length=LARGE_BITS;
|
|
|
1459 |
|
|
|
1460 |
if (cod_info->block_type == SHORT_TYPE) {
|
|
|
1461 |
cod_info->sfb_lmax = 0; /* No sb*/
|
|
|
1462 |
cod_info->sfb_smin = 0;
|
|
|
1463 |
} else {
|
|
|
1464 |
/* MPEG 1 doesnt use last scalefactor band */
|
|
|
1465 |
cod_info->sfb_lmax = SBPSY_l;
|
|
|
1466 |
cod_info->sfb_smin = SBPSY_s; /* No sb */
|
|
|
1467 |
if (cod_info->mixed_block_flag) {
|
|
|
1468 |
cod_info->sfb_lmax = 8;
|
|
|
1469 |
cod_info->sfb_smin = 3;
|
|
|
1470 |
}
|
|
|
1471 |
}
|
|
|
1472 |
|
|
|
1473 |
/* quality setting */
|
|
|
1474 |
masking_lower_db = dbQ[gfp->VBR_q];
|
|
|
1475 |
if (pe[gr][ch]>750) {
|
|
|
1476 |
masking_lower_db -= Min(10,4*(pe[gr][ch]-750.)/750.);
|
|
|
1477 |
}
|
|
|
1478 |
gfc->masking_lower = pow(10.0,masking_lower_db/10);
|
|
|
1479 |
|
|
|
1480 |
/* masking thresholds */
|
|
|
1481 |
over_ath = calc_xmin(gfp,xr[gr][ch],&ratio[gr][ch],cod_info,&l3_xmin[gr][ch]);
|
|
|
1482 |
|
|
|
1483 |
/* if there are bands with more energy than the ATH
|
|
|
1484 |
* then we say the frame is not analog silent */
|
|
|
1485 |
if (over_ath) {
|
|
|
1486 |
analog_silence = 0;
|
|
|
1487 |
}
|
|
|
1488 |
|
|
|
1489 |
/* if there is no line with more energy than 1e-20
|
|
|
1490 |
* then this granule is considered to be digital silent
|
|
|
1491 |
* plus calculation of xr34 */
|
|
|
1492 |
digital_silence[gr][ch] = 1;
|
|
|
1493 |
for(i=0;i<576;i++) {
|
|
|
1494 |
FLOAT8 temp=fabs(xr[gr][ch][i]);
|
|
|
1495 |
xr34[gr][ch][i]=sqrt(sqrt(temp)*temp);
|
|
|
1496 |
digital_silence[gr][ch] &= temp < 1E-20;
|
|
|
1497 |
}
|
|
|
1498 |
} /* ch */
|
|
|
1499 |
} /* gr */
|
|
|
1500 |
|
|
|
1501 |
|
|
|
1502 |
/* compute minimum allowed bits from minimum allowed bitrate */
|
|
|
1503 |
if (analog_silence) {
|
|
|
1504 |
gfc->bitrate_index=1;
|
|
|
1505 |
} else {
|
|
|
1506 |
gfc->bitrate_index=gfc->VBR_min_bitrate;
|
|
|
1507 |
}
|
|
|
1508 |
getframebits(gfp, &bitsPerFrame, &mean_bits);
|
|
|
1509 |
minbits = (mean_bits/gfc->channels_out);
|
|
|
1510 |
|
|
|
1511 |
/* compute maximum allowed bits from max allowed bitrate */
|
|
|
1512 |
gfc->bitrate_index=gfc->VBR_max_bitrate;
|
|
|
1513 |
getframebits(gfp, &bitsPerFrame, &mean_bits);
|
|
|
1514 |
max_frame_bits = ResvFrameBegin(gfp, l3_side, mean_bits, bitsPerFrame);
|
|
|
1515 |
maxbits=2.5*(mean_bits/gfc->channels_out);
|
|
|
1516 |
|
|
|
1517 |
{
|
|
|
1518 |
/* compute a target mean_bits based on compression ratio
|
|
|
1519 |
* which was set based on VBR_q
|
|
|
1520 |
*/
|
|
|
1521 |
int bit_rate = gfp->out_samplerate*16*gfc->channels_out/(1000.0*gfp->compression_ratio);
|
|
|
1522 |
bitsPerFrame = (bit_rate*gfp->framesize*1000)/gfp->out_samplerate;
|
|
|
1523 |
mean_bits = (bitsPerFrame - 8*gfc->sideinfo_len) / gfc->mode_gr;
|
|
|
1524 |
}
|
|
|
1525 |
|
|
|
1526 |
|
|
|
1527 |
minbits = Max(minbits,125);
|
|
|
1528 |
minbits=Max(minbits,.40*(mean_bits/gfc->channels_out));
|
|
|
1529 |
maxbits=Min(maxbits,2.5*(mean_bits/gfc->channels_out));
|
|
|
1530 |
|
|
|
1531 |
|
|
|
1532 |
|
|
|
1533 |
|
|
|
1534 |
|
|
|
1535 |
|
|
|
1536 |
|
|
|
1537 |
/*
|
|
|
1538 |
* loop over all ch,gr, encoding anything with bits > .5*(max_frame_bits/4)
|
|
|
1539 |
*
|
|
|
1540 |
* If a particular granule uses way too many bits, it will be re-encoded
|
|
|
1541 |
* on the next iteration of the loop (with a lower quality setting).
|
|
|
1542 |
* But granules which dont use
|
|
|
1543 |
* use too many bits will not be re-encoded.
|
|
|
1544 |
*
|
|
|
1545 |
* minbits: minimum allowed bits for 1 granule 1 channel
|
|
|
1546 |
* maxbits: maximum allowwed bits for 1 granule 1 channel
|
|
|
1547 |
* max_frame_bits: maximum allowed bits for entire frame
|
|
|
1548 |
* (max_frame_bits/4) estimate of average bits per granule per channel
|
|
|
1549 |
*
|
|
|
1550 |
*/
|
|
|
1551 |
|
|
|
1552 |
do {
|
|
|
1553 |
|
|
|
1554 |
totbits=0;
|
|
|
1555 |
for (gr = 0; gr < gfc->mode_gr; gr++) {
|
|
|
1556 |
int minbits_lr[2];
|
|
|
1557 |
minbits_lr[0]=minbits;
|
|
|
1558 |
minbits_lr[1]=minbits;
|
|
|
1559 |
|
|
|
1560 |
#if 0
|
|
|
1561 |
if (gfc->mode_ext==MPG_MD_MS_LR) {
|
|
|
1562 |
FLOAT8 fac;
|
|
|
1563 |
fac = .33*(.5-ms_ener_ratio[gr])/.5;
|
|
|
1564 |
if (fac<0) fac=0;
|
|
|
1565 |
if (fac>.5) fac=.5;
|
|
|
1566 |
minbits_lr[0] = (1+fac)*minbits;
|
|
|
1567 |
minbits_lr[1] = Max(125,(1-fac)*minbits);
|
|
|
1568 |
}
|
|
|
1569 |
#endif
|
|
|
1570 |
|
|
|
1571 |
|
|
|
1572 |
for (ch = 0; ch < gfc->channels_out; ch++) {
|
|
|
1573 |
int adjusted,shortblock;
|
|
|
1574 |
cod_info = &l3_side->gr[gr].ch[ch].tt;
|
|
|
1575 |
|
|
|
1576 |
/* ENCODE this data first pass, and on future passes unless it uses
|
|
|
1577 |
* a very small percentage of the max_frame_bits */
|
|
|
1578 |
if (cod_info->part2_3_length > (max_frame_bits/(2*gfc->channels_out*gfc->mode_gr))) {
|
|
|
1579 |
|
|
|
1580 |
shortblock = (cod_info->block_type == SHORT_TYPE);
|
|
|
1581 |
|
|
|
1582 |
/* Adjust allowed masking based on quality setting */
|
|
|
1583 |
if (qadjust!=0 /*|| shortblock*/) {
|
|
|
1584 |
masking_lower_db = dbQ[gfp->VBR_q] + qadjust;
|
|
|
1585 |
|
|
|
1586 |
/*
|
|
|
1587 |
if (shortblock) masking_lower_db -= 4;
|
|
|
1588 |
*/
|
|
|
1589 |
|
|
|
1590 |
if (pe[gr][ch]>750)
|
|
|
1591 |
masking_lower_db -= Min(10,4*(pe[gr][ch]-750.)/750.);
|
|
|
1592 |
gfc->masking_lower = pow(10.0,masking_lower_db/10);
|
|
|
1593 |
calc_xmin( gfp, xr[gr][ch], ratio[gr]+ch, cod_info, l3_xmin[gr]+ch);
|
|
|
1594 |
}
|
|
|
1595 |
|
|
|
1596 |
/* digital silent granules do not need the full round trip,
|
|
|
1597 |
* but this can be optimized later on
|
|
|
1598 |
*/
|
|
|
1599 |
adjusted = VBR_noise_shaping (gfp,xr[gr][ch],xr34[gr][ch],
|
|
|
1600 |
ratio[gr]+ch,l3_enc[gr][ch],
|
|
|
1601 |
digital_silence[gr][ch],
|
|
|
1602 |
minbits_lr[ch],
|
|
|
1603 |
maxbits,scalefac[gr]+ch,
|
|
|
1604 |
l3_xmin[gr]+ch,gr,ch);
|
|
|
1605 |
if (adjusted>10) {
|
|
|
1606 |
/* global_gain was changed by a large amount to get bits < maxbits */
|
|
|
1607 |
/* quality is set to high. we could set bits = LARGE_BITS
|
|
|
1608 |
* to force re-encoding. But most likely the other channels/granules
|
|
|
1609 |
* will also use too many bits, and the entire frame will
|
|
|
1610 |
* be > max_frame_bits, forcing re-encoding below.
|
|
|
1611 |
*/
|
|
|
1612 |
// cod_info->part2_3_bits = LARGE_BITS;
|
|
|
1613 |
}
|
|
|
1614 |
}
|
|
|
1615 |
totbits += cod_info->part2_3_length;
|
|
|
1616 |
}
|
|
|
1617 |
}
|
|
|
1618 |
bits_ok=1;
|
|
|
1619 |
if (totbits>max_frame_bits) {
|
|
|
1620 |
/* lower quality */
|
|
|
1621 |
qadjust += Max(.125,Min(1,(totbits-max_frame_bits)/300.0));
|
|
|
1622 |
/* adjusting minbits and maxbits is necessary too
|
|
|
1623 |
* cos lowering quality is not enough in rare cases
|
|
|
1624 |
* when each granule still needs almost maxbits, it wont fit */
|
|
|
1625 |
minbits = Max(125,minbits*0.975);
|
|
|
1626 |
maxbits = Max(minbits,maxbits*0.975);
|
|
|
1627 |
// DEBUGF("%i totbits>max_frame_bits totbits=%i maxbits=%i \n",gfp->frameNum,totbits,max_frame_bits);
|
|
|
1628 |
// DEBUGF("next masking_lower_db = %f \n",masking_lower_db + qadjust);
|
|
|
1629 |
bits_ok=0;
|
|
|
1630 |
}
|
|
|
1631 |
|
|
|
1632 |
} while (!bits_ok);
|
|
|
1633 |
|
|
|
1634 |
|
|
|
1635 |
|
|
|
1636 |
/* find optimal scalefac storage. Cant be done above because
|
|
|
1637 |
* might enable scfsi which breaks the interation loops */
|
|
|
1638 |
totbits=0;
|
|
|
1639 |
for (gr = 0; gr < gfc->mode_gr; gr++) {
|
|
|
1640 |
for (ch = 0; ch < gfc->channels_out; ch++) {
|
|
|
1641 |
best_scalefac_store(gfc, gr, ch, l3_enc, l3_side, scalefac);
|
|
|
1642 |
totbits += l3_side->gr[gr].ch[ch].tt.part2_3_length;
|
|
|
1643 |
}
|
|
|
1644 |
}
|
|
|
1645 |
|
|
|
1646 |
|
|
|
1647 |
|
|
|
1648 |
|
|
|
1649 |
if (analog_silence && !gfp->VBR_hard_min) {
|
|
|
1650 |
gfc->bitrate_index = 1;
|
|
|
1651 |
} else {
|
|
|
1652 |
gfc->bitrate_index = gfc->VBR_min_bitrate;
|
|
|
1653 |
}
|
|
|
1654 |
for( ; gfc->bitrate_index < gfc->VBR_max_bitrate; gfc->bitrate_index++ ) {
|
|
|
1655 |
|
|
|
1656 |
getframebits (gfp, &bitsPerFrame, &mean_bits);
|
|
|
1657 |
maxbits = ResvFrameBegin(gfp, l3_side, mean_bits, bitsPerFrame);
|
|
|
1658 |
if (totbits <= maxbits) break;
|
|
|
1659 |
}
|
|
|
1660 |
if (gfc->bitrate_index == gfc->VBR_max_bitrate) {
|
|
|
1661 |
getframebits (gfp, &bitsPerFrame, &mean_bits);
|
|
|
1662 |
maxbits = ResvFrameBegin(gfp, l3_side, mean_bits, bitsPerFrame);
|
|
|
1663 |
}
|
|
|
1664 |
|
|
|
1665 |
// DEBUGF("%i total_bits=%i max_frame_bits=%i index=%i \n",gfp->frameNum,totbits,max_frame_bits,gfc->bitrate_index);
|
|
|
1666 |
|
|
|
1667 |
for (gr = 0; gr < gfc->mode_gr; gr++) {
|
|
|
1668 |
for (ch = 0; ch < gfc->channels_out; ch++) {
|
|
|
1669 |
cod_info = &l3_side->gr[gr].ch[ch].tt;
|
|
|
1670 |
|
|
|
1671 |
|
|
|
1672 |
ResvAdjust (gfc, cod_info, l3_side, mean_bits);
|
|
|
1673 |
|
|
|
1674 |
/*******************************************************************
|
|
|
1675 |
* set the sign of l3_enc from the sign of xr
|
|
|
1676 |
*******************************************************************/
|
|
|
1677 |
for ( i = 0; i < 576; i++) {
|
|
|
1678 |
if (xr[gr][ch][i] < 0) l3_enc[gr][ch][i] *= -1;
|
|
|
1679 |
}
|
|
|
1680 |
}
|
|
|
1681 |
}
|
|
|
1682 |
ResvFrameEnd (gfc, l3_side, mean_bits);
|
|
|
1683 |
|
|
|
1684 |
|
|
|
1685 |
|
|
|
1686 |
}
|
|
|
1687 |
|
|
|
1688 |
|
|
|
1689 |
|