layer3.c File Reference

#include "mpg123lib_intern.h"
#include "huffman.h"
#include "getbits.h"
#include "debug.h"

Include dependency graph for layer3.c:

Go to the source code of this file.

Classes
struct	III_sideinfo
struct	bandInfoStruct

Macros
#define	NEW_DCT9
#define	MASK_STYPE   int32_t
#define	MASK_UTYPE   uint32_t
#define	MASK_TYPE   MASK_UTYPE
#define	MSB_MASK   ((MASK_UTYPE)mask & (MASK_UTYPE)1<<(sizeof(MASK_TYPE)*8-1))
#define	BITSHIFT   ((sizeof(MASK_TYPE)-1)*8)
#define	REFRESH_MASK
#define	CHECK_XRPNT
#define	MACRO(v)
#define	DCT12_PART1
#define	DCT12_PART2

Functions
static	ALIGNED (16)
real	init_layer3_gainpow2 (mpg123_handle *fr, int i)
void	init_layer3 (void)
void	init_layer3_stuff (mpg123_handle *fr, real(*gainpow2)(mpg123_handle *fr, int i))
static int	III_get_side_info (mpg123_handle *fr, struct III_sideinfo *si, int stereo, int ms_stereo, long sfreq, int single)
static int	III_get_scale_factors_1 (mpg123_handle *fr, int *scf, struct gr_info_s *gr_info, int ch, int gr)
static int	III_get_scale_factors_2 (mpg123_handle *fr, int *scf, struct gr_info_s *gr_info, int i_stereo)
static int	III_dequantize_sample (mpg123_handle *fr, real xr[SBLIMIT][SSLIMIT], int *scf, struct gr_info_s *gr_info, int sfreq, int part2bits)
static void	III_i_stereo (real xr_buf[2][SBLIMIT][SSLIMIT], int *scalefac, struct gr_info_s *gr_info, int sfreq, int ms_stereo, int lsf)
static void	III_antialias (real xr[SBLIMIT][SSLIMIT], struct gr_info_s *gr_info)
void	dct36 (real *inbuf, real *o1, real *o2, real *wintab, real *tsbuf)
static void	dct12 (real *in, real *rawout1, real *rawout2, register real *wi, register real *ts)
static void	III_hybrid (real fsIn[SBLIMIT][SSLIMIT], real tsOut[SSLIMIT][SBLIMIT], int ch, struct gr_info_s *gr_info, mpg123_handle *fr)
static void	fill_pinfo_side (mpg123_handle *fr, struct III_sideinfo *si, int gr, int stereo1)
int	do_layer3 (mpg123_handle *fr)

Variables
static real	ispow [8207]
static real	aa_ca [8]
static real	aa_cs [8]
static const struct bandInfoStruct	bandInfo [9]
static int	mapbuf0 [9][152]
static int	mapbuf1 [9][156]
static int	mapbuf2 [9][44]
static int *	map [9][3]
static int *	mapend [9][3]
static unsigned int	n_slen2 [512]
static unsigned int	i_slen2 [256]
static unsigned char	pretab_choice [2][22]

Macro Definition Documentation

BITSHIFT

#define BITSHIFT   ((sizeof(MASK_TYPE)-1)*8)

Definition at line 787 of file layer3.c.

CHECK_XRPNT

#define CHECK_XRPNT

Value:

if(xrpnt >= &xr[SBLIMIT][0]) \
{ \
    if(NOQUIET) \
        error2("attempted xrpnt overflow (%p !< %p)", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); \
    return 1; \
}

DCT12_PART1

#define DCT12_PART1

Value:

    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 = REAL_MUL(in2, COS6_1); \
    in3 = REAL_MUL(in3, COS6_1);

DCT12_PART2

#define DCT12_PART2

Value:

    in0 += REAL_MUL(in4, COS6_2); \
    \
    in4 = in0 + in2; \
    in0 -= in2;      \
    \
    in1 += REAL_MUL(in5, COS6_2); \
    \
    in5 = REAL_MUL((in1 + in3), tfcos12[0]); \
    in1 = REAL_MUL((in1 - in3), tfcos12[2]); \
    \
    in3 = in4 + in5; \
    in4 -= in5;      \
    \
    in2 = in0 + in1; \
    in0 -= in1;

MACRO

#define MACRO

(

v

)

Value:

        { \
        real tmpval; \
        tmpval = tmp[(v)] + tmp[17-(v)]; \
        out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \
        out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \
        tmpval = tmp[(v)] - tmp[17-(v)]; \
        ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \
        ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); }

MASK_STYPE

#define MASK_STYPE   int32_t

Definition at line 782 of file layer3.c.

MASK_TYPE

#define MASK_TYPE   MASK_UTYPE

Definition at line 784 of file layer3.c.

MASK_UTYPE

#define MASK_UTYPE   uint32_t

Definition at line 783 of file layer3.c.

MSB_MASK

#define MSB_MASK   ((MASK_UTYPE)mask & (MASK_UTYPE)1<<(sizeof(MASK_TYPE)*8-1))

Definition at line 785 of file layer3.c.

NEW_DCT9

#define NEW_DCT9

REFRESH_MASK

#define REFRESH_MASK

Value:

    while(num < BITSHIFT) { \
        mask |= ((MASK_UTYPE)getbyte(fr))<<(BITSHIFT-num); \
        num += 8; \
        part2remain -= 8; }

Definition at line 788 of file layer3.c.

Function Documentation

ALIGNED()

static ALIGNED ( 16  )

static

Definition at line 40 of file layer3.c.

{
    int scfsi;
    unsigned part2_3_length;
    unsigned big_values;
    unsigned scalefac_compress;
    unsigned block_type;
    unsigned mixed_block_flag;
    unsigned table_select[3];
    /* Making those two signed int as workaround for open64/pathscale/sun compilers, and also for consistency, since they're worked on together with other signed variables. */
    int maxband[3];
    int maxbandl;
    unsigned maxb;
    unsigned region1start;
    unsigned region2start;
    unsigned preflag;
    unsigned scalefac_scale;
    unsigned count1table_select;
    real *full_gain[3];
    real *pow2gain;
};

dct12()

static void dct12 ( real *  in, real *  rawout1, real *  rawout2, register real *  wi, register real *  ts  )

static

Definition at line 1838 of file layer3.c.

{
#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 = REAL_MUL(in2, COS6_1); \
    in3 = REAL_MUL(in3, COS6_1);
 
#define DCT12_PART2 \
    in0 += REAL_MUL(in4, COS6_2); \
    \
    in4 = in0 + in2; \
    in0 -= in2;      \
    \
    in1 += REAL_MUL(in5, COS6_2); \
    \
    in5 = REAL_MUL((in1 + in3), tfcos12[0]); \
    in1 = REAL_MUL((in1 - in3), tfcos12[2]); \
    \
    in3 = in4 + in5; \
    in4 -= in5;      \
    \
    in2 = in0 + in1; \
    in0 -= in1;
 
    {
        real in0,in1,in2,in3,in4,in5;
        register 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 = REAL_MUL((in1 - in5), tfcos12[1]);
                tmp0 = tmp1 + tmp2;
                tmp1 -= tmp2;
            }
            ts[(17-1)*SBLIMIT] = out1[17-1] + REAL_MUL(tmp0, wi[11-1]);
            ts[(12+1)*SBLIMIT] = out1[12+1] + REAL_MUL(tmp0, wi[6+1]);
            ts[(6 +1)*SBLIMIT] = out1[6 +1] + REAL_MUL(tmp1, wi[1]);
            ts[(11-1)*SBLIMIT] = out1[11-1] + REAL_MUL(tmp1, wi[5-1]);
        }
 
        DCT12_PART2
 
        ts[(17-0)*SBLIMIT] = out1[17-0] + REAL_MUL(in2, wi[11-0]);
        ts[(12+0)*SBLIMIT] = out1[12+0] + REAL_MUL(in2, wi[6+0]);
        ts[(12+2)*SBLIMIT] = out1[12+2] + REAL_MUL(in3, wi[6+2]);
        ts[(17-2)*SBLIMIT] = out1[17-2] + REAL_MUL(in3, wi[11-2]);
 
        ts[(6 +0)*SBLIMIT]  = out1[6+0] + REAL_MUL(in0, wi[0]);
        ts[(11-0)*SBLIMIT] = out1[11-0] + REAL_MUL(in0, wi[5-0]);
        ts[(6 +2)*SBLIMIT]  = out1[6+2] + REAL_MUL(in4, wi[2]);
        ts[(11-2)*SBLIMIT] = out1[11-2] + REAL_MUL(in4, wi[5-2]);
    }
 
    in++;
 
    {
        real in0,in1,in2,in3,in4,in5;
        register real *out2 = rawout2;
 
        DCT12_PART1
 
        {
            real tmp0,tmp1 = (in0 - in4);
            {
                real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]);
                tmp0 = tmp1 + tmp2;
                tmp1 -= tmp2;
            }
            out2[5-1] = REAL_MUL(tmp0, wi[11-1]);
            out2[0+1] = REAL_MUL(tmp0, wi[6+1]);
            ts[(12+1)*SBLIMIT] += REAL_MUL(tmp1, wi[1]);
            ts[(17-1)*SBLIMIT] += REAL_MUL(tmp1, wi[5-1]);
        }
 
        DCT12_PART2
 
        out2[5-0] = REAL_MUL(in2, wi[11-0]);
        out2[0+0] = REAL_MUL(in2, wi[6+0]);
        out2[0+2] = REAL_MUL(in3, wi[6+2]);
        out2[5-2] = REAL_MUL(in3, wi[11-2]);
 
        ts[(12+0)*SBLIMIT] += REAL_MUL(in0, wi[0]);
        ts[(17-0)*SBLIMIT] += REAL_MUL(in0, wi[5-0]);
        ts[(12+2)*SBLIMIT] += REAL_MUL(in4, wi[2]);
        ts[(17-2)*SBLIMIT] += REAL_MUL(in4, wi[5-2]);
    }
 
    in++;
 
    {
        real in0,in1,in2,in3,in4,in5;
        register 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 = REAL_MUL((in1 - in5), tfcos12[1]);
                tmp0 = tmp1 + tmp2;
                tmp1 -= tmp2;
            }
            out2[11-1] = REAL_MUL(tmp0, wi[11-1]);
            out2[6 +1] = REAL_MUL(tmp0, wi[6+1]);
            out2[0+1] += REAL_MUL(tmp1, wi[1]);
            out2[5-1] += REAL_MUL(tmp1, wi[5-1]);
        }
 
        DCT12_PART2
 
        out2[11-0] = REAL_MUL(in2, wi[11-0]);
        out2[6 +0] = REAL_MUL(in2, wi[6+0]);
        out2[6 +2] = REAL_MUL(in3, wi[6+2]);
        out2[11-2] = REAL_MUL(in3, wi[11-2]);
 
        out2[0+0] += REAL_MUL(in0, wi[0]);
        out2[5-0] += REAL_MUL(in0, wi[5-0]);
        out2[0+2] += REAL_MUL(in4, wi[2]);
        out2[5-2] += REAL_MUL(in4, wi[5-2]);
    }
}

Referenced by III_hybrid().

dct36()

void dct36	(	real *	inbuf,
		real *	o1,
		real *	o2,
		real *	wintab,
		real *	tsbuf
	)

Definition at line 1554 of file layer3.c.

{
#ifdef NEW_DCT9
    real tmp[18];
#endif
 
    {
        register 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];
 
 
#ifdef NEW_DCT9
#if 1
        {
            real t3;
            {
                real t0, t1, t2;
 
                t0 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
                t1 = REAL_MUL(COS6_2, in[12]);
 
                t3 = in[0];
                t2 = t3 - t1 - t1;
                tmp[1] = tmp[7] = t2 - t0;
                tmp[4]          = t2 + t0 + t0;
                t3 += t1;
 
                t2 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
                tmp[1] -= t2;
                tmp[7] += t2;
            }
            {
                real t0, t1, t2;
 
                t0 = REAL_MUL(cos9[0], (in[4] + in[8] ));
                t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
                t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
 
                tmp[2] = tmp[6] = t3 - t0      - t2;
                tmp[0] = tmp[8] = t3 + t0 + t1;
                tmp[3] = tmp[5] = t3      - t1 + t2;
            }
        }
        {
            real t1, t2, t3;
 
            t1 = REAL_MUL(cos18[0], (in[2]  + in[10]));
            t2 = REAL_MUL(cos18[1], (in[10] - in[14]));
            t3 = REAL_MUL(COS6_1,    in[6]);
 
            {
                real t0 = t1 + t2 + t3;
                tmp[0] += t0;
                tmp[8] -= t0;
            }
 
            t2 -= t3;
            t1 -= t3;
 
            t3 = REAL_MUL(cos18[2], (in[2] + in[14]));
 
            t1 += t3;
            tmp[3] += t1;
            tmp[5] -= t1;
 
            t2 -= t3;
            tmp[2] += t2;
            tmp[6] -= t2;
        }
 
#else
        {
            real t0, t1, t2, t3, t4, t5, t6, t7;
 
            t1 = REAL_MUL(COS6_2, in[12]);
            t2 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4]));
 
            t3 = in[0] + t1;
            t4 = in[0] - t1 - t1;
            t5     = t4 - t2;
            tmp[4] = t4 + t2 + t2;
 
            t0 = REAL_MUL(cos9[0], (in[4] + in[8]));
            t1 = REAL_MUL(cos9[1], (in[8] - in[16]));
 
            t2 = REAL_MUL(cos9[2], (in[4] + in[16]));
 
            t6 = t3 - t0 - t2;
            t0 += t3 + t1;
            t3 += t2 - t1;
 
            t2 = REAL_MUL(cos18[0], (in[2]  + in[10]));
            t4 = REAL_MUL(cos18[1], (in[10] - in[14]));
            t7 = REAL_MUL(COS6_1, in[6]);
 
            t1 = t2 + t4 + t7;
            tmp[0] = t0 + t1;
            tmp[8] = t0 - t1;
            t1 = REAL_MUL(cos18[2], (in[2] + in[14]));
            t2 += t1 - t7;
 
            tmp[3] = t3 + t2;
            t0 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2]));
            tmp[5] = t3 - t2;
 
            t4 -= t1 + t7;
 
            tmp[1] = t5 - t0;
            tmp[7] = t5 + t0;
            tmp[2] = t6 + t4;
            tmp[6] = t6 - t4;
        }
#endif
 
        {
            real t0, t1, t2, t3, t4, t5, t6, t7;
 
            t1 = REAL_MUL(COS6_2, in[13]);
            t2 = REAL_MUL(COS6_2, (in[9] + in[17] - in[5]));
 
            t3 = in[1] + t1;
            t4 = in[1] - t1 - t1;
            t5 = t4 - t2;
 
            t0 = REAL_MUL(cos9[0], (in[5] + in[9]));
            t1 = REAL_MUL(cos9[1], (in[9] - in[17]));
 
            tmp[13] = REAL_MUL((t4 + t2 + t2), tfcos36[17-13]);
            t2 = REAL_MUL(cos9[2], (in[5] + in[17]));
 
            t6 = t3 - t0 - t2;
            t0 += t3 + t1;
            t3 += t2 - t1;
 
            t2 = REAL_MUL(cos18[0], (in[3]  + in[11]));
            t4 = REAL_MUL(cos18[1], (in[11] - in[15]));
            t7 = REAL_MUL(COS6_1, in[7]);
 
            t1 = t2 + t4 + t7;
            tmp[17] = REAL_MUL((t0 + t1), tfcos36[17-17]);
            tmp[9]  = REAL_MUL((t0 - t1), tfcos36[17-9]);
            t1 = REAL_MUL(cos18[2], (in[3] + in[15]));
            t2 += t1 - t7;
 
            tmp[14] = REAL_MUL((t3 + t2), tfcos36[17-14]);
            t0 = REAL_MUL(COS6_1, (in[11] + in[15] - in[3]));
            tmp[12] = REAL_MUL((t3 - t2), tfcos36[17-12]);
 
            t4 -= t1 + t7;
 
            tmp[16] = REAL_MUL((t5 - t0), tfcos36[17-16]);
            tmp[10] = REAL_MUL((t5 + t0), tfcos36[17-10]);
            tmp[15] = REAL_MUL((t6 + t4), tfcos36[17-15]);
            tmp[11] = REAL_MUL((t6 - t4), tfcos36[17-11]);
        }
 
#define MACRO(v) { \
        real tmpval; \
        tmpval = tmp[(v)] + tmp[17-(v)]; \
        out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \
        out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \
        tmpval = tmp[(v)] - tmp[17-(v)]; \
        ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \
        ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); }
 
        {
            register real *out2 = o2;
            register real *w = wintab;
            register real *out1 = o1;
            register real *ts = tsbuf;
 
            MACRO(0);
            MACRO(1);
            MACRO(2);
            MACRO(3);
            MACRO(4);
            MACRO(5);
            MACRO(6);
            MACRO(7);
            MACRO(8);
        }
 
#else
 
        {
 
#define MACRO0(v) { \
    real tmp; \
    out2[9+(v)] = REAL_MUL((tmp = sum0 + sum1), w[27+(v)]); \
    out2[8-(v)] = REAL_MUL(tmp, w[26-(v)]);   } \
    sum0 -= sum1; \
    ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(sum0, w[8-(v)]); \
    ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(sum0, w[9+(v)]);
#define MACRO1(v) { \
    real sum0,sum1; \
    sum0 = tmp1a + tmp2a; \
    sum1 = REAL_MUL((tmp1b + tmp2b), tfcos36[(v)]); \
    MACRO0(v); }
#define MACRO2(v) { \
    real sum0,sum1; \
    sum0 = tmp2a - tmp1a; \
    sum1 = REAL_MUL((tmp2b - tmp1b), tfcos36[(v)]); \
    MACRO0(v); }
 
            register const real *c = COS9;
            register real *out2 = o2;
            register real *w = wintab;
            register real *out1 = o1;
            register real *ts = tsbuf;
 
            real ta33,ta66,tb33,tb66;
 
            ta33 = REAL_MUL(in[2*3+0], c[3]);
            ta66 = REAL_MUL(in[2*6+0], c[6]);
            tb33 = REAL_MUL(in[2*3+1], c[3]);
            tb66 = REAL_MUL(in[2*6+1], c[6]);
 
            {
                real tmp1a,tmp2a,tmp1b,tmp2b;
                tmp1a = REAL_MUL(in[2*1+0], c[1]) + ta33 + REAL_MUL(in[2*5+0], c[5]) + REAL_MUL(in[2*7+0], c[7]);
                tmp1b = REAL_MUL(in[2*1+1], c[1]) + tb33 + REAL_MUL(in[2*5+1], c[5]) + REAL_MUL(in[2*7+1], c[7]);
                tmp2a = REAL_MUL(in[2*2+0], c[2]) + REAL_MUL(in[2*4+0], c[4]) + ta66 + REAL_MUL(in[2*8+0], c[8]);
                tmp2b = REAL_MUL(in[2*2+1], c[2]) + REAL_MUL(in[2*4+1], c[4]) + tb66 + REAL_MUL(in[2*8+1], c[8]);
 
                MACRO1(0);
                MACRO2(8);
            }
 
            {
                real tmp1a,tmp2a,tmp1b,tmp2b;
                tmp1a = REAL_MUL(( in[2*1+0] - in[2*5+0] - in[2*7+0] ), c[3]);
                tmp1b = REAL_MUL(( in[2*1+1] - in[2*5+1] - in[2*7+1] ), c[3]);
                tmp2a = REAL_MUL(( in[2*2+0] - in[2*4+0] - in[2*8+0] ), c[6]) - in[2*6+0] + in[2*0+0];
                tmp2b = REAL_MUL(( 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 =   REAL_MUL(in[2*1+0], c[5]) - ta33 - REAL_MUL(in[2*5+0], c[7]) + REAL_MUL(in[2*7+0], c[1]);
                tmp1b =   REAL_MUL(in[2*1+1], c[5]) - tb33 - REAL_MUL(in[2*5+1], c[7]) + REAL_MUL(in[2*7+1], c[1]);
                tmp2a = - REAL_MUL(in[2*2+0], c[8]) - REAL_MUL(in[2*4+0], c[2]) + ta66 + REAL_MUL(in[2*8+0], c[4]);
                tmp2b = - REAL_MUL(in[2*2+1], c[8]) - REAL_MUL(in[2*4+1], c[2]) + tb66 + REAL_MUL(in[2*8+1], c[4]);
 
                MACRO1(2);
                MACRO2(6);
            }
 
            {
                real tmp1a,tmp2a,tmp1b,tmp2b;
                tmp1a =   REAL_MUL(in[2*1+0], c[7]) - ta33 + REAL_MUL(in[2*5+0], c[1]) - REAL_MUL(in[2*7+0], c[5]);
                tmp1b =   REAL_MUL(in[2*1+1], c[7]) - tb33 + REAL_MUL(in[2*5+1], c[1]) - REAL_MUL(in[2*7+1], c[5]);
                tmp2a = - REAL_MUL(in[2*2+0], c[4]) + REAL_MUL(in[2*4+0], c[8]) + ta66 - REAL_MUL(in[2*8+0], c[2]);
                tmp2b = - REAL_MUL(in[2*2+1], c[4]) + REAL_MUL(in[2*4+1], c[8]) + tb66 - REAL_MUL(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 = REAL_MUL((in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ), tfcos36[4]);
                MACRO0(4);
            }
        }
#endif
 
    }
}

do_layer3()

int do_layer3

(

mpg123_handle *

fr

)

Definition at line 2099 of file layer3.c.

{
    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;
    int stereo = fr->stereo;
    int single = fr->single;
    int ms_stereo,i_stereo;
    int sfreq = fr->sampling_frequency;
    int stereo1,granules;
 
    if(stereo == 1)
    { /* stream is mono */
        stereo1 = 1;
        single = SINGLE_LEFT;
    }
    else if(single != SINGLE_STEREO) /* 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)>>1;
        i_stereo  = fr->mode_ext & 0x1;
    }
    else ms_stereo = i_stereo = 0;
 
    granules = fr->lsf ? 1 : 2;
 
    /* quick hack to keep the music playing */
    /* after having seen this nasty test file... */
    if(III_get_side_info(fr, &sideinfo,stereo,ms_stereo,sfreq,single))
    {
        if(NOQUIET) error("bad frame - unable to get valid sideinfo");
        return clip;
    }
 
    set_pointer(fr, 1, sideinfo.main_data_begin);
#ifndef NO_MOREINFO
    if(fr->pinfo)
    {
        fr->pinfo->maindata = sideinfo.main_data_begin;
        fr->pinfo->padding  = fr->padding;
    }
#endif
    for(gr=0;gr<granules;gr++)
    {
        /*  hybridIn[2][SBLIMIT][SSLIMIT] */
        real (*hybridIn)[SBLIMIT][SSLIMIT] = fr->layer3.hybrid_in;
        /*  hybridOut[2][SSLIMIT][SBLIMIT] */
        real (*hybridOut)[SSLIMIT][SBLIMIT] = fr->layer3.hybrid_out;
 
        {
            struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]);
            long part2bits;
            if(gr_info->part2_3_length > fr->bits_avail)
            {
                if(NOQUIET)
                    error2(
                        "part2_3_length (%u) too large for available bit count (%li)"
                    ,   gr_info->part2_3_length, fr->bits_avail );
                return clip;
            }
            if(fr->lsf)
            part2bits = III_get_scale_factors_2(fr, scalefacs[0],gr_info,0);
            else
            part2bits = III_get_scale_factors_1(fr, scalefacs[0],gr_info,0,gr);
 
            if(part2bits < 0)
            {
                if(VERBOSE2)
                    error("not enough bits for scale factors");
                return clip;
            }
 
#ifndef NO_MOREINFO
            if(fr->pinfo)
            {
                int i;
                fr->pinfo->sfbits[gr][0] = part2bits;
                for(i=0; i<39; ++i)
                    fr->pinfo->sfb_s[gr][0][i] = scalefacs[0][i];
            }
#endif
 
            if(III_dequantize_sample(fr, hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits))
            {
                if(NOQUIET)
                    error("dequantization failed!");
                return clip;
            }
            if(fr->bits_avail < 0)
            {
                if(NOQUIET)
                    error("bit deficit after dequant");
                return clip;
            }
        }
 
        if(stereo == 2)
        {
            struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]);
            long part2bits;
            if(fr->lsf)
            part2bits = III_get_scale_factors_2(fr, scalefacs[1],gr_info,i_stereo);
            else
            part2bits = III_get_scale_factors_1(fr, scalefacs[1],gr_info,1,gr);
 
            if(part2bits < 0)
            {
                if(VERBOSE2)
                    error("not enough bits for scale factors");
                return clip;
            }
 
#ifndef NO_MOREINFO
            if(fr->pinfo)
            {
                int i;
                fr->pinfo->sfbits[gr][1] = part2bits;
                for(i=0; i<39; ++i)
                    fr->pinfo->sfb_s[gr][1][i] = scalefacs[1][i];
            }
#endif
 
            if(III_dequantize_sample(fr, hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits))
            {
                if(NOQUIET)
                    error("dequantization failed!");
                return clip;
            }
            if(fr->bits_avail < 0)
            {
                if(NOQUIET)
                    error("bit deficit after dequant");
                return clip;
            }
 
            if(ms_stereo)
            {
                int i;
                unsigned int maxb = sideinfo.ch[0].gr[gr].maxb;
                if(sideinfo.ch[1].gr[gr].maxb > maxb) maxb = sideinfo.ch[1].gr[gr].maxb;
 
                for(i=0;i<SSLIMIT*(int)maxb;i++)
                {
                    real tmp0 = ((real *)hybridIn[0])[i];
                    real tmp1 = ((real *)hybridIn[1])[i];
                    ((real *)hybridIn[0])[i] = tmp0 + tmp1;
                    ((real *)hybridIn[1])[i] = tmp0 - tmp1;
                }
            }
 
            if(i_stereo) III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf);
 
            if(ms_stereo || i_stereo || (single == SINGLE_MIX) )
            {
                if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb)
                sideinfo.ch[0].gr[gr].maxb = gr_info->maxb;
                else
                gr_info->maxb = sideinfo.ch[0].gr[gr].maxb;
            }
 
            switch(single)
            {
                case SINGLE_MIX:
                {
                    register int i;
                    register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
                    for(i=0;i<SSLIMIT*(int)gr_info->maxb;i++,in0++)
                    *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */
                }
                break;
                case SINGLE_RIGHT:
                {
                    register int i;
                    register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1];
                    for(i=0;i<SSLIMIT*(int)gr_info->maxb;i++)
                    *in0++ = *in1++;
                }
                break;
            }
        }
 
#ifndef NO_MOREINFO
        if(fr->pinfo)
            fill_pinfo_side(fr, &sideinfo, gr, stereo1);
#endif
 
        for(ch=0;ch<stereo1;ch++)
        {
            struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]);
            III_antialias(hybridIn[ch],gr_info);
            III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info, fr);
        }
 
#ifdef OPT_I486
        if(single != SINGLE_STEREO || fr->af.encoding != MPG123_ENC_SIGNED_16 || fr->down_sample != 0)
        {
#endif
        for(ss=0;ss<SSLIMIT;ss++)
        {
            if(single != SINGLE_STEREO)
            clip += (fr->synth_mono)(hybridOut[0][ss], fr);
            else
            clip += (fr->synth_stereo)(hybridOut[0][ss], hybridOut[1][ss], fr);
 
        }
#ifdef OPT_I486
        } else
        {
            /* Only stereo, 16 bits benefit from the 486 optimization. */
            ss=0;
            while(ss < SSLIMIT)
            {
                int n;
                n=(fr->buffer.size - fr->buffer.fill) / (2*2*32);
                if(n > (SSLIMIT-ss)) n=SSLIMIT-ss;
 
                /* Clip counting makes no sense with this function. */
                absynth_1to1_i486(hybridOut[0][ss], 0, fr, n);
                absynth_1to1_i486(hybridOut[1][ss], 1, fr, n);
                ss+=n;
                fr->buffer.fill+=(2*2*32)*n;
            }
        }
#endif
    }
 
    return clip;
}

fill_pinfo_side()

static void fill_pinfo_side ( mpg123_handle *  fr, struct III_sideinfo *  si, int  gr, int  stereo1  )

static

Definition at line 2031 of file layer3.c.

{
    int   i, sb;
    float ifqstep; /* Why not double? */
    int ch, ss;;
 
    for(ch = 0; ch < stereo1; ++ch)
    {
        struct gr_info_s *gr_infos = &(si->ch[ch].gr[gr]);
        fr->pinfo->big_values[gr][ch] = gr_infos->big_values;
        fr->pinfo->scalefac_scale[gr][ch] = gr_infos->scalefac_scale;
        fr->pinfo->mixed[gr][ch] = gr_infos->mixed_block_flag;
        fr->pinfo->blocktype[gr][ch] = gr_infos->block_type;
        fr->pinfo->mainbits[gr][ch] = gr_infos->part2_3_length;
        fr->pinfo->preflag[gr][ch] = gr_infos->preflag;
        if(gr == 1)
            fr->pinfo->scfsi[ch] = gr_infos->scfsi;
    }
 
    for(ch = 0; ch < stereo1; ++ch)
    {
        struct gr_info_s *gr_infos = &(si->ch[ch].gr[gr]);
        ifqstep = (fr->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[] before */
                    fr->pinfo->sfb_s[gr][ch][j] = -ifqstep *
                        fr->pinfo->sfb_s[gr][ch][j - gr_infos->mixed_block_flag];
                    fr->pinfo->sfb_s[gr][ch][j] -= 2 *
                        (fr->pinfo->sub_gain[gr][ch][i]);
                }
                fr->pinfo->sfb_s[gr][ch][3 * sb + i] =
                    -2 * (fr->pinfo->sub_gain[gr][ch][i]);
            }
        } else
        {
            for(sb = 0; sb < 21; ++sb)
            {
                /* scalefac was copied into pinfo->sfb[] before */
                fr->pinfo->sfb[gr][ch][sb] = fr->pinfo->sfb_s[gr][ch][sb];
                if (gr_infos->preflag)
                    fr->pinfo->sfb[gr][ch][sb] += pretab_choice[1][sb];
                fr->pinfo->sfb[gr][ch][sb] *= -ifqstep;
            }
            fr->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)
                fr->pinfo->xr[gr][ch][j] = fr->layer3.hybrid_in[ch][sb][ss];
    }
}

Referenced by do_layer3().

III_antialias()

static void III_antialias ( real  xr[SBLIMIT][SSLIMIT], struct gr_info_s *  gr_info  )

static

Definition at line 1482 of file layer3.c.

{
    int sblim;
 
    if(gr_info->block_type == 2)
    {
            if(!gr_info->mixed_block_flag) return;
 
            sblim = 1;
    }
    else sblim = gr_info->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 */
                register real bu = *--xr2,bd = *xr1;
                *xr2   = REAL_MUL(bu, *cs) - REAL_MUL(bd, *ca);
                *xr1++ = REAL_MUL(bd, *cs++) + REAL_MUL(bu, *ca++);
            }
        }
    }
}

Referenced by do_layer3().

III_dequantize_sample()

static int III_dequantize_sample ( mpg123_handle *  fr, real  xr[SBLIMIT][SSLIMIT], int *  scf, struct gr_info_s *  gr_info, int  sfreq, int  part2bits  )

static

Definition at line 795 of file layer3.c.

{
    int shift = 1 + gr_info->scalefac_scale;
    real *xrpnt = (real *) xr;
    int l[3],l3;
    int part2remain = gr_info->part2_3_length - part2bits;
    int *me;
#ifdef REAL_IS_FIXED
    int gainpow2_scale_idx = 378;
#endif
 
    /* Assumption: If there is some part2_3_length at all, there should be
       enough of it to work with properly. In case of zero length we silently
       zero things. */
    if(gr_info->part2_3_length > 0)
    {
 
    /* mhipp tree has this split up a bit... */
    int num=getbitoffset(fr);
    MASK_TYPE mask;
    /* We must split this, because for num==0 the shift is undefined if you do it in one step. */
    mask  = ((MASK_UTYPE) getbits(fr, num))<<BITSHIFT;
    mask <<= 8-num;
    part2remain -= num;
 
    /* Bitindex is zero now, we are allowed to use getbyte(). */
 
    {
        int bv       = gr_info->big_values;
        int region1  = gr_info->region1start;
        int region2  = gr_info->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;
            }
        }
    }
 
#define CHECK_XRPNT if(xrpnt >= &xr[SBLIMIT][0]) \
{ \
    if(NOQUIET) \
        error2("attempted xrpnt overflow (%p !< %p)", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); \
    return 1; \
}
 
    if(gr_info->block_type == 2)
    {
        /* decoding with short or mixed mode BandIndex table */
        int i,max[4];
        int step=0,lwin=3,cb=0;
        register real v = 0.0;
        register int *m,mc;
 
        if(gr_info->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];
            const struct newhuff *h = ht+gr_info->table_select[i];
            for(;lp;lp--,mc--)
            {
                register MASK_STYPE x,y;
                if( (!mc) )
                {
                    mc    = *m++;
//fprintf(stderr, "%i setting xrpnt = xr + %i (%ld)\n", __LINE__, *m, xrpnt-(real*)xr);
                    xrpnt = ((real *) xr) + (*m++);
                    lwin  = *m++;
                    cb    = *m++;
                    if(lwin == 3)
                    {
#ifdef REAL_IS_FIXED
                        gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
#endif
                        v = gr_info->pow2gain[(*scf++) << shift];
                        step = 1;
                    }
                    else
                    {
#ifdef REAL_IS_FIXED
                        gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2);
#endif
                        v = gr_info->full_gain[lwin][(*scf++) << shift];
                        step = 3;
                    }
                }
                {
                    const short *val = h->table;
                    REFRESH_MASK;
#ifdef USE_NEW_HUFFTABLE
                    while((y=val[(MASK_UTYPE)mask>>(BITSHIFT+4)])<0)
                    {
                        val -= y;
                        num -= 4;
                        mask <<= 4;
                    }
                    num -= (y >> 8);
                    mask <<= (y >> 8);
                    x = (y >> 4) & 0xf;
                    y &= 0xf;
#else
                    while((y=*val++)<0)
                    {
                        if (MSB_MASK) val -= y;
 
                        num--;
                        mask <<= 1;
                    }
                    x = y >> 4;
                    y &= 0xf;
#endif
                }
                CHECK_XRPNT;
                if(x == 15 && h->linbits)
                {
                    max[lwin] = cb;
                    REFRESH_MASK;
                    x += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
                    num -= h->linbits+1;
                    mask <<= h->linbits;
                    if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
                    else         *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
 
                    mask <<= 1;
                }
                else if(x)
                {
                    max[lwin] = cb;
                    if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
                    else         *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
 
                    num--;
                    mask <<= 1;
                }
                else *xrpnt = DOUBLE_TO_REAL(0.0);
 
                xrpnt += step;
                CHECK_XRPNT;
                if(y == 15 && h->linbits)
                {
                    max[lwin] = cb;
                    REFRESH_MASK;
                    y += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
                    num -= h->linbits+1;
                    mask <<= h->linbits;
                    if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
                    else         *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
 
                    mask <<= 1;
                }
                else if(y)
                {
                    max[lwin] = cb;
                    if(MSB_MASK) *xrpnt = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
                    else         *xrpnt = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
 
                    num--;
                    mask <<= 1;
                }
                else *xrpnt = DOUBLE_TO_REAL(0.0);
 
                xrpnt += step;
            }
        }
 
        for(;l3 && (part2remain+num > 0);l3--)
        {
            const struct newhuff* h;
            const short* val;
            register short a;
 
            h = htc+gr_info->count1table_select;
            val = h->table;
 
            REFRESH_MASK;
            while((a=*val++)<0)
            {
                if(MSB_MASK) val -= a;
 
                num--;
                mask <<= 1;
            }
            if(part2remain+num <= 0)
            {
                num -= part2remain+num;
                break;
            }
 
            for(i=0;i<4;i++)
            {
                if(!(i & 1))
                {
                    if(!mc)
                    {
                        mc = *m++;
//fprintf(stderr, "%i setting xrpnt = xr + %i (%ld)\n", __LINE__, *m, xrpnt-(real*)xr);
                        xrpnt = ((real *) xr) + (*m++);
                        lwin = *m++;
                        cb = *m++;
                        if(lwin == 3)
                        {
#ifdef REAL_IS_FIXED
                            gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
#endif
                            v = gr_info->pow2gain[(*scf++) << shift];
                            step = 1;
                        }
                        else
                        {
#ifdef REAL_IS_FIXED
                            gainpow2_scale_idx = (int)(gr_info->full_gain[lwin] + (*scf << shift) - fr->gainpow2);
#endif
                            v = gr_info->full_gain[lwin][(*scf++) << shift];
                            step = 3;
                        }
                    }
                    mc--;
                }
                CHECK_XRPNT;
                if( (a & (0x8>>i)) )
                {
                    max[lwin] = cb;
                    if(part2remain+num <= 0)
                    break;
 
                    if(MSB_MASK) *xrpnt = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
                    else         *xrpnt =  REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
 
                    num--;
                    mask <<= 1;
                }
                else *xrpnt = DOUBLE_TO_REAL(0.0);
 
                xrpnt += step;
            }
        }
 
        if(lwin < 3)
        { /* short band? */
            while(1)
            {
                for(;mc > 0;mc--)
                {
                    CHECK_XRPNT;
                    *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; /* short band -> step=3 */
                    *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3;
                }
                if(m >= me)
                break;
 
                mc    = *m++;
                xrpnt = ((real *) xr) + *m++;
                if(*m++ == 0)
                break; /* optimize: field will be set to zero at the end of the function */
 
                m++; /* cb */
            }
        }
 
        gr_info->maxband[0] = max[0]+1;
        gr_info->maxband[1] = max[1]+1;
        gr_info->maxband[2] = max[2]+1;
        gr_info->maxbandl   = max[3]+1;
 
        {
            int rmax = max[0] > max[1] ? max[0] : max[1];
            rmax = (rmax > max[2] ? rmax : max[2]) + 1;
            gr_info->maxb = rmax ? fr->shortLimit[sfreq][rmax] : fr->longLimit[sfreq][max[3]+1];
        }
 
    }
    else
    {
        /* decoding with 'long' BandIndex table (block_type != 2) */
        const unsigned char *pretab = pretab_choice[gr_info->preflag];
        int i,max = -1;
        int cb = 0;
        int *m = map[sfreq][2];
        register real v = 0.0;
        int mc = 0;
 
        /* long hash table values */
        for(i=0;i<3;i++)
        {
            int lp = l[i];
            const struct newhuff *h = ht+gr_info->table_select[i];
 
            for(;lp;lp--,mc--)
            {
                MASK_STYPE x,y;
                if(!mc)
                {
                    mc = *m++;
                    cb = *m++;
#ifdef CUT_SFB21
                    if(cb == 21)
                        v = 0.0;
                    else
#endif
                    {
#ifdef REAL_IS_FIXED
                        gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
#endif
                        v = gr_info->pow2gain[(*(scf++) + (*pretab++)) << shift];
                    }
                }
                {
                    const short *val = h->table;
                    REFRESH_MASK;
#ifdef USE_NEW_HUFFTABLE
                    while((y=val[(MASK_UTYPE)mask>>(BITSHIFT+4)])<0)
                    {
                        val -= y;
                        num -= 4;
                        mask <<= 4;
                    }
                    num -= (y >> 8);
                    mask <<= (y >> 8);
                    x = (y >> 4) & 0xf;
                    y &= 0xf;
#else
                    while((y=*val++)<0)
                    {
                        if (MSB_MASK) val -= y;
 
                        num--;
                        mask <<= 1;
                    }
                    x = y >> 4;
                    y &= 0xf;
#endif
                }
 
                CHECK_XRPNT;
                if(x == 15 && h->linbits)
                {
                    max = cb;
                    REFRESH_MASK;
                    x += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
                    num -= h->linbits+1;
                    mask <<= h->linbits;
                    if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
                    else         *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
 
                    mask <<= 1;
                }
                else if(x)
                {
                    max = cb;
                    if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[x], v, gainpow2_scale_idx);
                    else         *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[x], v, gainpow2_scale_idx);
                    num--;
 
                    mask <<= 1;
                }
                else *xrpnt++ = DOUBLE_TO_REAL(0.0);
 
                CHECK_XRPNT;
                if(y == 15 && h->linbits)
                {
                    max = cb;
                    REFRESH_MASK;
                    y += ((MASK_UTYPE) mask) >> (BITSHIFT+8-h->linbits);
                    num -= h->linbits+1;
                    mask <<= h->linbits;
                    if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
                    else         *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
 
                    mask <<= 1;
                }
                else if(y)
                {
                    max = cb;
                    if(MSB_MASK) *xrpnt++ = REAL_MUL_SCALE_LAYER3(-ispow[y], v, gainpow2_scale_idx);
                    else         *xrpnt++ = REAL_MUL_SCALE_LAYER3( ispow[y], v, gainpow2_scale_idx);
 
                    num--;
                    mask <<= 1;
                }
                else *xrpnt++ = DOUBLE_TO_REAL(0.0);
            }
        }
 
        /* short (count1table) values */
        for(;l3 && (part2remain+num > 0);l3--)
        {
            const struct newhuff *h = htc+gr_info->count1table_select;
            const short *val = h->table;
            register short a;
 
            REFRESH_MASK;
            while((a=*val++)<0)
            {
                if (MSB_MASK) val -= a;
 
                num--;
                mask <<= 1;
            }
            if(part2remain+num <= 0)
            {
                num -= part2remain+num;
                break;
            }
 
            for(i=0;i<4;i++)
            {
                if(!(i & 1))
                {
                    if(!mc)
                    {
                        mc = *m++;
                        cb = *m++;
#ifdef CUT_SFB21
                        if(cb == 21)
                            v = 0.0;
                        else
#endif
                        {
#ifdef REAL_IS_FIXED
                            gainpow2_scale_idx = (int)(gr_info->pow2gain + (*scf << shift) - fr->gainpow2);
#endif
                            v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift];
                        }
                    }
                    mc--;
                }
                CHECK_XRPNT;
                if( (a & (0x8>>i)) )
                {
                    max = cb;
                    if(part2remain+num <= 0)
                    break;
 
                    if(MSB_MASK) *xrpnt++ = -REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
                    else         *xrpnt++ =  REAL_SCALE_LAYER3(v, gainpow2_scale_idx);
 
                    num--;
                    mask <<= 1;
                }
                else *xrpnt++ = DOUBLE_TO_REAL(0.0);
            }
        }
 
        gr_info->maxbandl = max+1;
        gr_info->maxb = fr->longLimit[sfreq][gr_info->maxbandl];
    }
 
    part2remain += num;
    backbits(fr, num);
    num = 0;
 
    }
    else
    {
        part2remain = 0;
        /* Not entirely sure what good values are, must be > 0. */
        gr_info->maxband[0] =
        gr_info->maxband[1] =
        gr_info->maxband[2] =
        gr_info->maxbandl   = 1; /* sfb=maxband[lwin]*3 + lwin - mixed_block_flag must be >= 0 */
        gr_info->maxb       = 1;
    }
 
    while(xrpnt < &xr[SBLIMIT][0])
    *xrpnt++ = DOUBLE_TO_REAL(0.0);
 
    while( part2remain > 16 )
    {
        skipbits(fr, 16); /* Dismiss stuffing Bits */
        part2remain -= 16;
    }
    if(part2remain > 0) skipbits(fr, part2remain);
    else if(part2remain < 0)
    {
        if(VERBOSE2)
            error1("Can't rewind stream by %d bits!",-part2remain);
        return 1; /* -> error */
    }
    return 0;
}

Referenced by do_layer3().

III_get_scale_factors_1()

static int III_get_scale_factors_1 ( mpg123_handle *  fr, int *  scf, struct gr_info_s *  gr_info, int  ch, int  gr  )

static

Definition at line 585 of file layer3.c.

{
    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_info->scalefac_compress];
    int num1 = slen[1][gr_info->scalefac_compress];
 
    if(gr_info->part2_3_length == 0)
    {
        int i;
        for(i=0;i<39;i++)
            *scf++ = 0;
        return 0;
    }
 
    if(gr_info->block_type == 2)
    {
        int i=18;
        numbits = (num0 + num1) * 18 /* num0 * (17+1?) + num1 * 18 */
                - (gr_info->mixed_block_flag ? num0 : 0);
        if(numbits > gr_info->part2_3_length)
            return -1;
 
        if(gr_info->mixed_block_flag)
        {
            for (i=8;i;i--)
            *scf++ = getbits_fast(fr, num0);
 
            i = 9;
        }
 
        for(;i;i--) *scf++ = getbits_fast(fr, num0);
 
        for(i = 18; i; i--) *scf++ = getbits_fast(fr, num1);
 
        *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */
    }
    else
    {
        int i;
        int scfsi = gr_info->scfsi;
 
        if(scfsi < 0)
        { /* scfsi < 0 => granule == 0 */
            numbits = (num0 + num1) * 10 + num0;
            if(numbits > gr_info->part2_3_length)
                return -1;
 
            for(i=11;i;i--) *scf++ = getbits_fast(fr, num0);
 
            for(i=10;i;i--) *scf++ = getbits_fast(fr, num1);
 
            *scf++ = 0;
        }
        else
        {
            numbits = !(scfsi & 0x8) * num0 * 6
                    + !(scfsi & 0x4) * num0 * 5
                    + !(scfsi & 0x2) * num1 * 5
                    + !(scfsi & 0x1) * num1 * 5;
            if(numbits > gr_info->part2_3_length)
                return -1;
 
            if(!(scfsi & 0x8))
            {
                for (i=0;i<6;i++) *scf++ = getbits_fast(fr, num0);
            }
            else scf += 6;
 
            if(!(scfsi & 0x4))
            {
                for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num0);
            }
            else scf += 5;
 
            if(!(scfsi & 0x2))
            {
                for(i=0;i<5;i++) *scf++ = getbits_fast(fr, num1);
            }
            else scf += 5;
 
            if(!(scfsi & 0x1))
            {
                for (i=0;i<5;i++) *scf++ = getbits_fast(fr, num1);
            }
            else scf += 5;
 
            *scf++ = 0;  /* no l[21] in original sources */
        }
    }
 
    return numbits;
}

Referenced by do_layer3().

III_get_scale_factors_2()

static int III_get_scale_factors_2 ( mpg123_handle *  fr, int *  scf, struct gr_info_s *  gr_info, int  i_stereo  )

static

Definition at line 684 of file layer3.c.

{
    const unsigned char *pnt;
    int i,j,n=0,numbits=0;
    unsigned int slen, slen2;
 
    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}
        }
    };
 
    if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */
    slen = i_slen2[gr_info->scalefac_compress>>1];
    else
    slen = n_slen2[gr_info->scalefac_compress];
 
    gr_info->preflag = (slen>>15) & 0x1;
 
    n = 0;
    if( gr_info->block_type == 2 )
    {
        n++;
        if(gr_info->mixed_block_flag) n++;
    }
 
    pnt = stab[n][(slen>>12)&0x7];
 
    if(gr_info->part2_3_length == 0)
    {
        for(i=0;i<39;i++)
            *scf++ = 0;
        return 0;
    }
 
    slen2 = slen;
    for(i=0;i<4;i++)
    {
        int num = slen2 & 0x7;
        slen2 >>= 3;
        if(num)
            numbits += pnt[i] * num;
    }
    if(numbits > gr_info->part2_3_length)
        return -1;
 
    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(fr, 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;
}

Referenced by do_layer3().

III_get_side_info()

static int III_get_side_info ( mpg123_handle *  fr, struct III_sideinfo *  si, int  stereo, int  ms_stereo, long  sfreq, int  single  )

static

Definition at line 405 of file layer3.c.

{
    int ch, gr;
    int powdiff = (single == SINGLE_MIX) ? 4 : 0;
 
    const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } };
    const int *tab = tabs[fr->lsf];
 
    { /* First ensure we got enough bits available. */
        unsigned int needbits = 0;
        needbits += tab[1]; /* main_data_begin */
        needbits += stereo == 1 ? tab[2] : tab[3]; /* private */
        if(!fr->lsf)
            needbits += stereo*4; /* scfsi */
        /* For each granule for each channel ... */
        needbits += tab[0]*stereo*(29+tab[4]+1+22+(!fr->lsf?1:0)+2);
        if(fr->bits_avail < needbits) \
        {
            if(NOQUIET)
                error2( "%u bits for side info needed, only %li available"
                ,   needbits, fr->bits_avail );
            return 1;
        }
    }
 
    si->main_data_begin = getbits(fr, tab[1]);
 
    if(si->main_data_begin > fr->bitreservoir)
    {
        if(!fr->to_ignore && VERBOSE2) fprintf(stderr, "Note: missing %d bytes in bit reservoir for frame %li\n", (int)(si->main_data_begin - fr->bitreservoir), (long)fr->num);
 
        /*  overwrite main_data_begin for the really available bit reservoir */
        backbits(fr, tab[1]);
        if(fr->lsf == 0)
        {
            fr->wordpointer[0] = (unsigned char) (fr->bitreservoir >> 1);
            fr->wordpointer[1] = (unsigned char) ((fr->bitreservoir & 1) << 7);
        }
        else fr->wordpointer[0] = (unsigned char) fr->bitreservoir;
 
        /* zero "side-info" data for a silence-frame
        without touching audio data used as bit reservoir for following frame */
        memset(fr->wordpointer+2, 0, fr->ssize-2);
 
        /* reread the new bit reservoir offset */
        si->main_data_begin = getbits(fr, tab[1]);
    }
 
    /* Keep track of the available data bytes for the bit reservoir.
       CRC is included in ssize already. */
    fr->bitreservoir = fr->bitreservoir + fr->framesize - fr->ssize;
 
    /* Limit the reservoir to the max for MPEG 1.0 or 2.x . */
    if(fr->bitreservoir > (unsigned int) (fr->lsf == 0 ? 511 : 255))
    fr->bitreservoir = (fr->lsf == 0 ? 511 : 255);
 
    /* Now back into less commented territory. It's code. It works. */
 
    if (stereo == 1)
    si->private_bits = getbits(fr, tab[2]);
    else
    si->private_bits = getbits(fr, tab[3]);
 
    if(!fr->lsf) for(ch=0; ch<stereo; ch++)
    {
        si->ch[ch].gr[0].scfsi = -1;
        si->ch[ch].gr[1].scfsi = getbits(fr, 4);
    }
 
    for (gr=0; gr<tab[0]; gr++)
    for (ch=0; ch<stereo; ch++)
    {
        register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]);
        unsigned int qss;
        gr_info->part2_3_length = getbits(fr, 12);
        gr_info->big_values = getbits(fr, 9);
        if(gr_info->big_values > 288)
        {
            if(NOQUIET) error("big_values too large!");
            gr_info->big_values = 288;
        }
        qss = getbits_fast(fr, 8);
        gr_info->pow2gain = fr->gainpow2+256 - qss + powdiff;
        if(ms_stereo)
            gr_info->pow2gain += 2;
#ifndef NO_MOREINFO
        if(fr->pinfo)
            fr->pinfo->qss[gr][ch] = qss;
#endif
        gr_info->scalefac_compress = getbits(fr, tab[4]);
        if(gr_info->part2_3_length == 0)
        {
            if(gr_info->scalefac_compress > 0 && VERBOSE2)
                error1( "scalefac_compress should be zero instead of %i"
                ,   gr_info->scalefac_compress );
            gr_info->scalefac_compress = 0;
        }
 
        /* 22 bits for if/else block */
        if(getbits(fr,1))
        { /* window switch flag  */
            int i;
            gr_info->block_type       = getbits_fast(fr, 2);
            gr_info->mixed_block_flag = get1bit(fr);
            gr_info->table_select[0]  = getbits_fast(fr, 5);
            gr_info->table_select[1]  = getbits_fast(fr, 5);
            /*
                table_select[2] not needed, because there is no region2,
                but to satisfy some verification tools we set it either.
            */
            gr_info->table_select[2] = 0;
            for(i=0;i<3;i++)
            {
                unsigned int sbg = (getbits_fast(fr, 3)<<3);
                gr_info->full_gain[i] = gr_info->pow2gain + sbg;
#ifndef NO_MOREINFO
                if(fr->pinfo)
                    fr->pinfo->sub_gain[gr][ch][i] = sbg / 8;
#endif
            }
 
            if(gr_info->block_type == 0)
            {
                if(NOQUIET) error("Blocktype == 0 and window-switching == 1 not allowed.");
                return 1;
            }
 
            /* region_count/start parameters are implicit in this case. */
            if( (!fr->lsf || (gr_info->block_type == 2)) && !fr->mpeg25)
            {
                gr_info->region1start = 36>>1;
                gr_info->region2start = 576>>1;
            }
            else
            {
                if(fr->mpeg25)
                {
                    int r0c,r1c;
                    if((gr_info->block_type == 2) && (!gr_info->mixed_block_flag) ) r0c = 5;
                    else r0c = 7;
 
                    /* r0c+1+r1c+1 == 22, always. */
                    r1c = 20 - r0c;
                    gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
                    gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
                }
                else
                {
                    gr_info->region1start = 54>>1;
                    gr_info->region2start = 576>>1;
                }
            }
        }
        else
        {
            int i,r0c,r1c;
            for (i=0; i<3; i++)
            gr_info->table_select[i] = getbits_fast(fr, 5);
 
            r0c = getbits_fast(fr, 4); /* 0 .. 15 */
            r1c = getbits_fast(fr, 3); /* 0 .. 7 */
            gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ;
 
            /* max(r0c+r1c+2) = 15+7+2 = 24 */
            if(r0c+1+r1c+1 > 22) gr_info->region2start = 576>>1;
            else gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1;
 
            gr_info->block_type = 0;
            gr_info->mixed_block_flag = 0;
        }
        if(!fr->lsf) gr_info->preflag = get1bit(fr);
 
        gr_info->scalefac_scale = get1bit(fr);
        gr_info->count1table_select = get1bit(fr);
    }
    return 0;
}

Referenced by do_layer3().

III_hybrid()

static void III_hybrid ( real  fsIn[SBLIMIT][SSLIMIT], real  tsOut[SSLIMIT][SBLIMIT], int  ch, struct gr_info_s *  gr_info, mpg123_handle *  fr  )

static

Definition at line 1975 of file layer3.c.

{
    real (*block)[2][SBLIMIT*SSLIMIT] = fr->hybrid_block;
    int *blc = fr->hybrid_blc;
 
    real *tspnt = (real *) tsOut;
    real *rawout1,*rawout2;
    int bt = 0;
    size_t sb = 0;
 
    {
        int b = blc[ch];
        rawout1=block[b][ch];
        b=-b+1;
        rawout2=block[b][ch];
        blc[ch] = b;
    }
 
    if(gr_info->mixed_block_flag)
    {
        sb = 2;
        opt_dct36(fr)(fsIn[0],rawout1,rawout2,win[0],tspnt);
        opt_dct36(fr)(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1);
        rawout1 += 36; rawout2 += 36; tspnt += 2;
    }
 
    bt = gr_info->block_type;
    if(bt == 2)
    {
        for(; sb<gr_info->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<gr_info->maxb; sb+=2,tspnt+=2,rawout1+=36,rawout2+=36)
        {
            opt_dct36(fr)(fsIn[sb],rawout1,rawout2,win[bt],tspnt);
            opt_dct36(fr)(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++ = DOUBLE_TO_REAL(0.0);
        }
    }
}

Referenced by do_layer3().

III_i_stereo()

static void III_i_stereo ( real  xr_buf[2][SBLIMIT][SSLIMIT], int *  scalefac, struct gr_info_s *  gr_info, int  sfreq, int  ms_stereo, int  lsf  )

static

Definition at line 1310 of file layer3.c.

{
    real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf;
    const struct bandInfoStruct *bi = &bandInfo[sfreq];
 
    const real *tab1,*tab2;
 
#if 1
    int tab;
/* TODO: optimize as static */
    const real *tabs[3][2][2] =
    {
        { { tan1_1,tan2_1 }       , { tan1_2,tan2_2 } },
        { { pow1_1[0],pow2_1[0] } , { pow1_2[0],pow2_2[0] } },
        { { pow1_1[1],pow2_1[1] } , { pow1_2[1],pow2_2[1] } }
    };
 
    tab = lsf + (gr_info->scalefac_compress & lsf);
    tab1 = tabs[tab][ms_stereo][0];
    tab2 = tabs[tab][ms_stereo][1];
#else
    if(lsf)
    {
        int p = gr_info->scalefac_compress & 0x1;
        if(ms_stereo)
        {
            tab1 = pow1_2[p];
            tab2 = pow2_2[p];
        }
        else
        {
            tab1 = pow1_1[p];
            tab2 = pow2_1[p];
        }
    }
    else
    {
        if(ms_stereo)
        {
            tab1 = tan1_2;
            tab2 = tan2_2;
        }
        else
        {
            tab1 = tan1_1;
            tab2 = tan2_1;
        }
    }
#endif
 
    if(gr_info->block_type == 2)
    {
        int lwin,do_l = 0;
        if( gr_info->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_info->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_info->mixed_block_flag]; /* scale: 0-15 */
                if(is_p != 7)
                {
                    real t1,t2;
                    sb  = bi->shortDiff[sfb];
                    idx = bi->shortIdx[sfb] + lwin;
                    t1  = tab1[is_p]; t2 = tab2[is_p];
                    for (; sb > 0; sb--,idx+=3)
                    {
                        real v = xr[0][idx];
                        xr[0][idx] = REAL_MUL_15(v, t1);
                        xr[1][idx] = REAL_MUL_15(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_info->mixed_block_flag]; /* scale: 0-15 */
            sb   = bi->shortDiff[12];
            idx  = bi->shortIdx[12] + lwin;
#else
            is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */
            sb   = bi->shortDiff[11];
            idx  = bi->shortIdx[11] + lwin;
#endif
            if(is_p != 7)
            {
                real t1,t2;
                t1 = tab1[is_p]; t2 = tab2[is_p];
                for( ; sb > 0; sb--,idx+=3 )
                {
                    real v = xr[0][idx];
                    xr[0][idx] = REAL_MUL_15(v, t1);
                    xr[1][idx] = REAL_MUL_15(v, t2);
                }
            }
        } /* end for(lwin; .. ; . ) */
 
        /* also check l-part, if ALL bands in the three windows are 'empty' and mode = mixed_mode */
        if(do_l)
        {
            int sfb = gr_info->maxbandl;
            int idx;
            if(sfb > 21) return; /* similarity fix related to CVE-2006-1655 */
 
            idx = bi->longIdx[sfb];
            for( ; sfb<8; sfb++ )
            {
                int sb = bi->longDiff[sfb];
                int is_p = scalefac[sfb]; /* scale: 0-15 */
                if(is_p != 7)
                {
                    real t1,t2;
                    t1 = tab1[is_p]; t2 = tab2[is_p];
                    for( ; sb > 0; sb--,idx++)
                    {
                        real v = xr[0][idx];
                        xr[0][idx] = REAL_MUL_15(v, t1);
                        xr[1][idx] = REAL_MUL_15(v, t2);
                    }
                }
                else idx += sb;
            }
        }
    }
    else
    { /* ((gr_info->block_type != 2)) */
        int sfb = gr_info->maxbandl;
        int is_p,idx;
        if(sfb > 21) return; /* tightened fix for CVE-2006-1655 */
 
        idx = bi->longIdx[sfb];
        for ( ; sfb<21; sfb++)
        {
            int sb = bi->longDiff[sfb];
            is_p = scalefac[sfb]; /* scale: 0-15 */
            if(is_p != 7)
            {
                real t1,t2;
                t1 = tab1[is_p]; t2 = tab2[is_p];
                for( ; sb > 0; sb--,idx++)
                {
                     real v = xr[0][idx];
                     xr[0][idx] = REAL_MUL_15(v, t1);
                     xr[1][idx] = REAL_MUL_15(v, t2);
                }
            }
            else idx += sb;
        }
 
        is_p = scalefac[20];
        if(is_p != 7)
        {  /* copy l-band 20 to l-band 21 */
            int sb;
            real t1 = tab1[is_p],t2 = tab2[is_p];
 
            for( sb = bi->longDiff[21]; sb > 0; sb--,idx++ )
            {
                real v = xr[0][idx];
                xr[0][idx] = REAL_MUL_15(v, t1);
                xr[1][idx] = REAL_MUL_15(v, t2);
            }
        }
    }
}

Referenced by do_layer3().

init_layer3()

void init_layer3

(

void

)

Definition at line 183 of file layer3.c.

{
    int i,j,k,l;
 
#if !defined(REAL_IS_FIXED) || !defined(PRECALC_TABLES)
    for(i=0;i<8207;i++)
    ispow[i] = DOUBLE_TO_REAL_POW43(pow((double)i,(double)4.0/3.0));
 
    for(i=0;i<8;i++)
    {
        const double Ci[8] = {-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037};
        double sq = sqrt(1.0+Ci[i]*Ci[i]);
        aa_cs[i] = DOUBLE_TO_REAL(1.0/sq);
        aa_ca[i] = DOUBLE_TO_REAL(Ci[i]/sq);
    }
 
    for(i=0;i<18;i++)
    {
        win[0][i]    = win[1][i]    =
            DOUBLE_TO_REAL( 0.5*sin(M_PI/72.0 * (double)(2*(i+0) +1)) / cos(M_PI * (double)(2*(i+0) +19) / 72.0) );
        win[0][i+18] = win[3][i+18] =
            DOUBLE_TO_REAL( 0.5*sin(M_PI/72.0 * (double)(2*(i+18)+1)) / cos(M_PI * (double)(2*(i+18)+19) / 72.0) );
    }
    for(i=0;i<6;i++)
    {
        win[1][i+18] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ));
        win[3][i+12] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ));
        win[1][i+24] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 ));
        win[1][i+30] = win[3][i] = DOUBLE_TO_REAL(0.0);
        win[3][i+6 ] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1 ) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 ));
    }
 
    for(i=0;i<9;i++)
    COS9[i] = DOUBLE_TO_REAL(cos( M_PI / 18.0 * (double) i));
 
    for(i=0;i<9;i++)
    tfcos36[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 ));
 
    for(i=0;i<3;i++)
    tfcos12[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 ));
 
    COS6_1 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 1));
    COS6_2 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 2));
 
#ifdef NEW_DCT9
    cos9[0]  = DOUBLE_TO_REAL(cos(1.0*M_PI/9.0));
    cos9[1]  = DOUBLE_TO_REAL(cos(5.0*M_PI/9.0));
    cos9[2]  = DOUBLE_TO_REAL(cos(7.0*M_PI/9.0));
    cos18[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/18.0));
    cos18[1] = DOUBLE_TO_REAL(cos(11.0*M_PI/18.0));
    cos18[2] = DOUBLE_TO_REAL(cos(13.0*M_PI/18.0));
#endif
 
    for(i=0;i<12;i++)
    {
        win[2][i] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 ));
    }
 
    for(i=0;i<16;i++)
    {
        double t = tan( (double) i * M_PI / 12.0 );
        tan1_1[i] = DOUBLE_TO_REAL_15(t / (1.0+t));
        tan2_1[i] = DOUBLE_TO_REAL_15(1.0 / (1.0 + t));
        tan1_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 * t / (1.0+t));
        tan2_2[i] = DOUBLE_TO_REAL_15(M_SQRT2 / (1.0 + t));
    }
 
    for(i=0;i<32;i++)
    {
        for(j=0;j<2;j++)
        {
            double base = pow(2.0,-0.25*(j+1.0));
            double p1=1.0,p2=1.0;
            if(i > 0)
            {
                if( i & 1 ) p1 = pow(base,(i+1.0)*0.5);
                else p2 = pow(base,i*0.5);
            }
            pow1_1[j][i] = DOUBLE_TO_REAL_15(p1);
            pow2_1[j][i] = DOUBLE_TO_REAL_15(p2);
            pow1_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p1);
            pow2_2[j][i] = DOUBLE_TO_REAL_15(M_SQRT2 * p2);
        }
    }
#endif
 
    for(j=0;j<4;j++)
    {
        const int len[4] = { 36,36,12,36 };
        for(i=0;i<len[j];i+=2) win1[j][i] = + win[j][i];
 
        for(i=1;i<len[j];i+=2) win1[j][i] = - win[j][i];
    }
 
    for(j=0;j<9;j++)
    {
        const struct bandInfoStruct *bi = &bandInfo[j];
        int *mp;
        int cb,lwin;
        const unsigned char *bdf;
        int switch_idx;
 
        mp = map[j][0] = mapbuf0[j];
        bdf = bi->longDiff;
        switch_idx = (j < 3) ? 8 : 6;
        for(i=0,cb = 0; cb < switch_idx ; cb++,i+=*bdf++)
        {
            *mp++ = (*bdf) >> 1;
            *mp++ = i;
            *mp++ = 3;
            *mp++ = cb;
        }
        bdf = bi->shortDiff+3;
        for(cb=3;cb<13;cb++)
        {
            int l = (*bdf++) >> 1;
            for(lwin=0;lwin<3;lwin++)
            {
                *mp++ = l;
                *mp++ = i + lwin;
                *mp++ = lwin;
                *mp++ = cb;
            }
            i += 6*l;
        }
        mapend[j][0] = mp;
 
        mp = map[j][1] = mapbuf1[j];
        bdf = bi->shortDiff+0;
        for(i=0,cb=0;cb<13;cb++)
        {
            int l = (*bdf++) >> 1;
            for(lwin=0;lwin<3;lwin++)
            {
                *mp++ = l;
                *mp++ = i + lwin;
                *mp++ = lwin;
                *mp++ = cb;
            }
            i += 6*l;
        }
        mapend[j][1] = mp;
 
        mp = map[j][2] = mapbuf2[j];
        bdf = bi->longDiff;
        for(cb = 0; cb < 22 ; cb++)
        {
            *mp++ = (*bdf++) >> 1;
            *mp++ = cb;
        }
        mapend[j][2] = mp;
    }
 
    /* Now for some serious loopings! */
    for(i=0;i<5;i++)
    for(j=0;j<6;j++)
    for(k=0;k<6;k++)
    {
        int n = k + j * 6 + i * 36;
        i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12);
    }
    for(i=0;i<4;i++)
    for(j=0;j<4;j++)
    for(k=0;k<4;k++)
    {
        int n = k + j * 4 + i * 16;
        i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12);
    }
    for(i=0;i<4;i++)
    for(j=0;j<3;j++)
    {
        int n = j + i * 3;
        i_slen2[n+244] = i|(j<<3) | (5<<12);
        n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15);
    }
    for(i=0;i<5;i++)
    for(j=0;j<5;j++)
    for(k=0;k<4;k++)
    for(l=0;l<4;l++)
    {
        int n = l + k * 4 + j * 16 + i * 80;
        n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12);
    }
    for(i=0;i<5;i++)
    for(j=0;j<5;j++)
    for(k=0;k<4;k++)
    {
        int n = k + j * 4 + i * 20;
        n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12);
    }
}

init_layer3_gainpow2()

real init_layer3_gainpow2	(	mpg123_handle *	fr,
		int	i
	)

Definition at line 172 of file layer3.c.

{
#if defined(REAL_IS_FIXED) && defined(PRECALC_TABLES)
    return gainpow2[i+256];
#else
    return DOUBLE_TO_REAL_SCALE_LAYER3(pow((double)2.0,-0.25 * (double) (i+210)),i+256);
#endif
}

init_layer3_stuff()

void init_layer3_stuff	(	mpg123_handle *	fr,
		real(*)(mpg123_handle *fr, int i)	gainpow2
	)

Definition at line 376 of file layer3.c.

{
    int i,j;
 
    for(i=-256;i<118+4;i++) fr->gainpow2[i+256] = gainpow2(fr,i);
 
    for(j=0;j<9;j++)
    {
        for(i=0;i<23;i++)
        {
            fr->longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1;
            if(fr->longLimit[j][i] > (fr->down_sample_sblimit) )
            fr->longLimit[j][i] = fr->down_sample_sblimit;
        }
        for(i=0;i<14;i++)
        {
            fr->shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1;
            if(fr->shortLimit[j][i] > (fr->down_sample_sblimit) )
            fr->shortLimit[j][i] = fr->down_sample_sblimit;
        }
    }
}

Variable Documentation

aa_ca

real aa_ca[8]

static

Definition at line 39 of file layer3.c.

Referenced by III_antialias(), and init_layer3().

aa_cs

real aa_cs[8]

static

Definition at line 39 of file layer3.c.

Referenced by III_antialias(), and init_layer3().

bandInfo

const struct bandInfoStruct bandInfo[9]

static

Definition at line 95 of file layer3.c.

Referenced by CBandSiteBase::_OnContextMenu(), CBaseBarSite::EnumBands(), CDockSite::Exec(), CBaseBarSite::FindBandByGUID(), CBaseBarSite::GetBandObject(), CDockSite::GetRBBandInfo(), III_get_side_info(), III_i_stereo(), init_layer3(), init_layer3_stuff(), CDockSite::Initialize(), CBaseBarSite::InsertBar(), CInternetToolbar::IsBandVisible(), CBaseBarSite::RemoveBand(), CBaseBarSite::ShowBand(), and CInternetToolbar::ToggleBandVisibility().

i_slen2

unsigned int i_slen2[256]

static

Definition at line 160 of file layer3.c.

Referenced by III_get_scale_factors_2(), and init_layer3().

ispow

real ispow[8207]

static

Definition at line 38 of file layer3.c.

Referenced by III_dequantize_sample(), and init_layer3().

map

int* map[9][3]

static

Definition at line 156 of file layer3.c.

mapbuf0

int mapbuf0[9][152]

static

Definition at line 153 of file layer3.c.

Referenced by init_layer3().

mapbuf1

int mapbuf1[9][156]

static

Definition at line 154 of file layer3.c.

Referenced by init_layer3().

mapbuf2

int mapbuf2[9][44]

static

Definition at line 155 of file layer3.c.

Referenced by init_layer3().

mapend

int* mapend[9][3]

static

Definition at line 157 of file layer3.c.

Referenced by III_dequantize_sample(), and init_layer3().

n_slen2

unsigned int n_slen2[512]

static

Definition at line 159 of file layer3.c.

Referenced by III_get_scale_factors_2(), and init_layer3().

pretab_choice

unsigned char pretab_choice[2][22]

static

Initial value:

=
{
    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
    {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}
}

Definition at line 758 of file layer3.c.

Referenced by fill_pinfo_side(), and III_dequantize_sample().