ref: 81cae8475c46dd7e376efb542f97b52dc53c89fd
dir: /amr-wb/q_pulse.c/
/*--------------------------------------------------------------------------*
* Q_PULSE.C *
*--------------------------------------------------------------------------*
* Coding and decodeing of algebraic codebook *
*--------------------------------------------------------------------------*/
#include <stdio.h>
#include "typedef.h"
#include "basic_op.h"
#include "count.h"
#include "q_pulse.h"
#define NB_POS 16 /* pos in track, mask for sign bit */
Word32 quant_1p_N1( /* (o) return N+1 bits */
Word16 pos, /* (i) position of the pulse */
Word16 N) /* (i) number of bits for position */
{
Word16 mask;
Word32 index;
mask = sub(shl(1, N), 1); /* mask = ((1<<N)-1); */
/*-------------------------------------------------------*
* Quantization of 1 pulse with N+1 bits: *
*-------------------------------------------------------*/
index = L_deposit_l((Word16) (pos & mask));
test();
if ((pos & NB_POS) != 0)
{
index = L_add(index, L_deposit_l(shl(1, N))); /* index += 1 << N; */
}
return (index);
}
void dec_1p_N1(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 pos1;
Word32 mask, i;
mask = L_deposit_l(sub(shl(1, N), 1)); /* mask = ((1<<N)-1); */
/*-------------------------------------------------------*
* Decode 1 pulse with N+1 bits: *
*-------------------------------------------------------*/
pos1 = add(extract_l(index & mask), offset); /* pos1 = ((index & mask) + offset); */
i = (L_shr(index, N) & 1L); /* i = ((index >> N) & 1); */
test();
if (L_sub(i, 1) == 0)
{
pos1 = add(pos1, NB_POS);
}
pos[0] = pos1; move16();
return;
}
Word32 quant_2p_2N1( /* (o) return (2*N)+1 bits */
Word16 pos1, /* (i) position of the pulse 1 */
Word16 pos2, /* (i) position of the pulse 2 */
Word16 N) /* (i) number of bits for position */
{
Word16 mask, tmp;
Word32 index;
mask = sub(shl(1, N), 1); /* mask = ((1<<N)-1); */
/*-------------------------------------------------------*
* Quantization of 2 pulses with 2*N+1 bits: *
*-------------------------------------------------------*/
test();logic16();logic16();
if (((pos2 ^ pos1) & NB_POS) == 0)
{
/* sign of 1st pulse == sign of 2th pulse */
test();
if (sub(pos1, pos2) <= 0) /* ((pos1 - pos2) <= 0) */
{
/* index = ((pos1 & mask) << N) + (pos2 & mask); */
index = L_deposit_l(add(shl(((Word16) (pos1 & mask)), N), ((Word16) (pos2 & mask))));
} else
{
/* ((pos2 & mask) << N) + (pos1 & mask); */
index = L_deposit_l(add(shl(((Word16) (pos2 & mask)), N), ((Word16) (pos1 & mask))));
}
test();logic16();
if ((pos1 & NB_POS) != 0)
{
tmp = shl(N, 1);
index = L_add(index, L_shl(1L, tmp)); /* index += 1 << (2*N); */
}
} else
{
/* sign of 1st pulse != sign of 2th pulse */
test();logic16();logic16();
if (sub((Word16) (pos1 & mask), (Word16) (pos2 & mask)) <= 0)
{
/* index = ((pos2 & mask) << N) + (pos1 & mask); */
index = L_deposit_l(add(shl(((Word16) (pos2 & mask)), N), ((Word16) (pos1 & mask)))); logic16();logic16();
test();logic16();
if ((pos2 & NB_POS) != 0)
{
tmp = shl(N, 1); /* index += 1 << (2*N); */
index = L_add(index, L_shl(1L, tmp));
}
} else
{
/* index = ((pos1 & mask) << N) + (pos2 & mask); */
index = L_deposit_l(add(shl(((Word16) (pos1 & mask)), N), ((Word16) (pos2 & mask)))); logic16();logic16();
test();logic16();
if ((pos1 & NB_POS) != 0)
{
tmp = shl(N, 1);
index = L_add(index, L_shl(1, tmp)); /* index += 1 << (2*N); */
}
}
}
return (index);
}
void dec_2p_2N1(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 pos1, pos2, tmp;
Word32 mask, i;
mask = L_deposit_l(sub(shl(1, N), 1)); /* mask = ((1<<N)-1); */
/*-------------------------------------------------------*
* Decode 2 pulses with 2*N+1 bits: *
*-------------------------------------------------------*/
/* pos1 = (((index >> N) & mask) + offset); */
pos1 = extract_l(L_add((L_shr(index, N) & mask), L_deposit_l(offset))); logic16();
tmp = shl(N, 1);
i = (L_shr(index, tmp) & 1L); logic16();/* i = (index >> (2*N)) & 1; */
pos2 = add(extract_l(index & mask), offset); logic16();/* pos2 = ((index & mask) + offset); */
test();
if (sub(pos2, pos1) < 0) /* ((pos2 - pos1) < 0) */
{
test();
if (L_sub(i, 1L) == 0)
{ /* (i == 1) */
pos1 = add(pos1, NB_POS); /* pos1 += NB_POS; */
} else
{
pos2 = add(pos2, NB_POS); /* pos2 += NB_POS; */
}
} else
{
test();
if (L_sub(i, 1L) == 0)
{ /* (i == 1) */
pos1 = add(pos1, NB_POS); /* pos1 += NB_POS; */
pos2 = add(pos2, NB_POS); /* pos2 += NB_POS; */
}
}
pos[0] = pos1; move16();
pos[1] = pos2; move16();
return;
}
Word32 quant_3p_3N1( /* (o) return (3*N)+1 bits */
Word16 pos1, /* (i) position of the pulse 1 */
Word16 pos2, /* (i) position of the pulse 2 */
Word16 pos3, /* (i) position of the pulse 3 */
Word16 N) /* (i) number of bits for position */
{
Word16 nb_pos;
Word32 index;
nb_pos = shl(1, sub(N, 1)); /* nb_pos = (1<<(N-1)); */
/*-------------------------------------------------------*
* Quantization of 3 pulses with 3*N+1 bits: *
*-------------------------------------------------------*/
test();test();logic16();logic16();logic16();logic16();
if (((pos1 ^ pos2) & nb_pos) == 0)
{
index = quant_2p_2N1(pos1, pos2, sub(N, 1)); /* index = quant_2p_2N1(pos1, pos2, (N-1)); */
/* index += (pos1 & nb_pos) << N; */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos1 & nb_pos)), N)); logic16();
/* index += quant_1p_N1(pos3, N) << (2*N); */
index = L_add(index, L_shl(quant_1p_N1(pos3, N), shl(N, 1)));
} else if (((pos1 ^ pos3) & nb_pos) == 0)
{
index = quant_2p_2N1(pos1, pos3, sub(N, 1)); /* index = quant_2p_2N1(pos1, pos3, (N-1)); */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos1 & nb_pos)), N)); logic16();
/* index += (pos1 & nb_pos) << N; */
index = L_add(index, L_shl(quant_1p_N1(pos2, N), shl(N, 1)));
/* index += quant_1p_N1(pos2, N) <<
* (2*N); */
} else
{
index = quant_2p_2N1(pos2, pos3, sub(N, 1)); /* index = quant_2p_2N1(pos2, pos3, (N-1)); */
/* index += (pos2 & nb_pos) << N; */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos2 & nb_pos)), N)); logic16();
/* index += quant_1p_N1(pos1, N) << (2*N); */
index = L_add(index, L_shl(quant_1p_N1(pos1, N), shl(N, 1)));
}
return (index);
}
void dec_3p_3N1(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 j, tmp;
Word32 mask, idx;
/*-------------------------------------------------------*
* Decode 3 pulses with 3*N+1 bits: *
*-------------------------------------------------------*/
tmp = sub(shl(N, 1), 1); /* mask = ((1<<((2*N)-1))-1); */
mask = L_sub(L_shl(1L, tmp), 1L);
idx = index & mask; logic16();
j = offset;
tmp = sub(shl(N, 1), 1);
test();logic16();
if ((L_shr(index, tmp) & 1L) != 0L)
{ /* if (((index >> ((2*N)-1)) & 1) == 1){ */
j = add(j, shl(1, sub(N, 1))); /* j += (1<<(N-1)); */
}
dec_2p_2N1(idx, (Word16) (N - 1), j, pos);
mask = sub(shl(1, add(N, 1)), 1); /* mask = ((1<<(N+1))-1); */
tmp = shl(N, 1); /* idx = (index >> (2*N)) & mask; */
idx = L_shr(index, tmp) & mask; logic16();
dec_1p_N1(idx, N, offset, pos + 2); move16();
return;
}
Word32 quant_4p_4N1( /* (o) return (4*N)+1 bits */
Word16 pos1, /* (i) position of the pulse 1 */
Word16 pos2, /* (i) position of the pulse 2 */
Word16 pos3, /* (i) position of the pulse 3 */
Word16 pos4, /* (i) position of the pulse 4 */
Word16 N) /* (i) number of bits for position */
{
Word16 nb_pos;
Word32 index;
nb_pos = shl(1, sub(N, 1)); /* nb_pos = (1<<(N-1)); */
/*-------------------------------------------------------*
* Quantization of 4 pulses with 4*N+1 bits: *
*-------------------------------------------------------*/
test();test();logic16();logic16();logic16();logic16();
if (((pos1 ^ pos2) & nb_pos) == 0)
{
index = quant_2p_2N1(pos1, pos2, sub(N, 1)); /* index = quant_2p_2N1(pos1, pos2, (N-1)); */
/* index += (pos1 & nb_pos) << N; */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos1 & nb_pos)), N)); logic16();
/* index += quant_2p_2N1(pos3, pos4, N) << (2*N); */
index = L_add(index, L_shl(quant_2p_2N1(pos3, pos4, N), shl(N, 1)));
} else if (((pos1 ^ pos3) & nb_pos) == 0)
{
index = quant_2p_2N1(pos1, pos3, sub(N, 1));
/* index += (pos1 & nb_pos) << N; */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos1 & nb_pos)), N)); logic16();
/* index += quant_2p_2N1(pos2, pos4, N) << (2*N); */
index = L_add(index, L_shl(quant_2p_2N1(pos2, pos4, N), shl(N, 1)));
} else
{
index = quant_2p_2N1(pos2, pos3, sub(N, 1));
/* index += (pos2 & nb_pos) << N; */
index = L_add(index, L_shl(L_deposit_l((Word16) (pos2 & nb_pos)), N)); logic16();
/* index += quant_2p_2N1(pos1, pos4, N) << (2*N); */
index = L_add(index, L_shl(quant_2p_2N1(pos1, pos4, N), shl(N, 1)));
}
return (index);
}
void dec_4p_4N1(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 j, tmp;
Word32 mask, idx;
/*-------------------------------------------------------*
* Decode 4 pulses with 4*N+1 bits: *
*-------------------------------------------------------*/
tmp = sub(shl(N, 1), 1); /* mask = ((1<<((2*N)-1))-1); */
mask = L_sub(L_shl(1L, tmp), 1L);
idx = index & mask; logic16();
j = offset; move16();
tmp = sub(shl(N, 1), 1);
test();logic16();
if ((L_shr(index, tmp) & 1L) != 0L)
{ /* (((index >> ((2*N)-1)) & 1) == 1) */
j = add(j, shl(1, sub(N, 1))); /* j += (1<<(N-1)); */
}
dec_2p_2N1(idx, (Word16) (N - 1), j, pos);
tmp = add(shl(N, 1), 1); /* mask = ((1<<((2*N)+1))-1); */
mask = L_sub(L_shl(1L, tmp), 1L);
idx = L_shr(index, shl(N, 1)) & mask; logic16();/* idx = (index >> (2*N)) & mask; */
dec_2p_2N1(idx, N, offset, pos + 2); move16(); /* dec_2p_2N1(idx, N, offset, pos+2); */
return;
}
Word32 quant_4p_4N( /* (o) return 4*N bits */
Word16 pos[], /* (i) position of the pulse 1..4 */
Word16 N) /* (i) number of bits for position */
{
Word16 i, j, k, nb_pos, mask, n_1, tmp;
Word16 posA[4], posB[4];
Word32 index;
n_1 = (Word16) (N - 1); move16();
nb_pos = shl(1, n_1); /* nb_pos = (1<<n_1); */
mask = sub(shl(1, N), 1); /* mask = ((1<<N)-1); */
i = 0; move16();
j = 0; move16();
for (k = 0; k < 4; k++)
{
test();logic16();
if ((pos[k] & nb_pos) == 0)
{
posA[i++] = pos[k]; move16();
} else
{
posB[j++] = pos[k]; move16();
}
}
switch (i)
{
case 0:
tmp = sub(shl(N, 2), 3); /* index = 1 << ((4*N)-3); */
index = L_shl(1L, tmp);
/* index += quant_4p_4N1(posB[0], posB[1], posB[2], posB[3], n_1); */
index = L_add(index, quant_4p_4N1(posB[0], posB[1], posB[2], posB[3], n_1));
break;
case 1:
/* index = quant_1p_N1(posA[0], n_1) << ((3*n_1)+1); */
tmp = add(extract_l(L_shr(L_mult(3, n_1), 1)), 1);
index = L_shl(quant_1p_N1(posA[0], n_1), tmp);
/* index += quant_3p_3N1(posB[0], posB[1], posB[2], n_1); */
index = L_add(index, quant_3p_3N1(posB[0], posB[1], posB[2], n_1));
break;
case 2:
tmp = add(shl(n_1, 1), 1); /* index = quant_2p_2N1(posA[0], posA[1], n_1) << ((2*n_1)+1); */
index = L_shl(quant_2p_2N1(posA[0], posA[1], n_1), tmp);
/* index += quant_2p_2N1(posB[0], posB[1], n_1); */
index = L_add(index, quant_2p_2N1(posB[0], posB[1], n_1));
break;
case 3:
/* index = quant_3p_3N1(posA[0], posA[1], posA[2], n_1) << N; */
index = L_shl(quant_3p_3N1(posA[0], posA[1], posA[2], n_1), N);
index = L_add(index, quant_1p_N1(posB[0], n_1)); /* index += quant_1p_N1(posB[0], n_1); */
break;
case 4:
index = quant_4p_4N1(posA[0], posA[1], posA[2], posA[3], n_1);
break;
default:
index = 0;
fprintf(stderr, "Error in function quant_4p_4N\n");
}
tmp = sub(shl(N, 2), 2); /* index += (i & 3) << ((4*N)-2); */
index = L_add(index, L_shl((L_deposit_l(i) & (3L)), tmp)); logic16();
return (index);
}
void dec_4p_4N(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 j, n_1, tmp;
/*-------------------------------------------------------*
* Decode 4 pulses with 4*N bits: *
*-------------------------------------------------------*/
n_1 = (Word16) (N - 1); move16();
j = add(offset, shl(1, n_1)); /* j = offset + (1 << n_1); */
tmp = sub(shl(N, 2), 2);
test();logic16();
switch (L_shr(index, tmp) & 3)
{ /* ((index >> ((4*N)-2)) & 3) */
case 0:
tmp = add(shl(n_1, 2), 1);
test();logic16();
if ((L_shr(index, tmp) & 1) == 0)
{ /* (((index >> ((4*n_1)+1)) & 1) == 0) */
dec_4p_4N1(index, n_1, offset, pos);
} else
{
dec_4p_4N1(index, n_1, j, pos);
}
break;
case 1:
tmp = add(extract_l(L_shr(L_mult(3, n_1), 1)), 1); /* dec_1p_N1((index>>((3*n_1)+1)), n_1, offset, pos) */
dec_1p_N1(L_shr(index, tmp), n_1, offset, pos);
dec_3p_3N1(index, n_1, j, pos + 1);move16();
break;
case 2:
tmp = add(shl(n_1, 1), 1); /* dec_2p_2N1((index>>((2*n_1)+1)), n_1, offset, pos); */
dec_2p_2N1(L_shr(index, tmp), n_1, offset, pos);
dec_2p_2N1(index, n_1, j, pos + 2);move16();
break;
case 3:
tmp = add(n_1, 1); /* dec_3p_3N1((index>>(n_1+1)), n_1, offset, pos); */
dec_3p_3N1(L_shr(index, tmp), n_1, offset, pos);
dec_1p_N1(index, n_1, j, pos + 3); move16();
break;
}
return;
}
Word32 quant_5p_5N( /* (o) return 5*N bits */
Word16 pos[], /* (i) position of the pulse 1..5 */
Word16 N) /* (i) number of bits for position */
{
Word16 i, j, k, nb_pos, n_1, tmp;
Word16 posA[5], posB[5];
Word32 index, tmp2;
n_1 = (Word16) (N - 1); move16();
nb_pos = shl(1, n_1); /* nb_pos = (1<<n_1); */
i = 0; move16();
j = 0; move16();
for (k = 0; k < 5; k++)
{
test();logic16();
if ((pos[k] & nb_pos) == 0)
{
posA[i++] = pos[k]; move16();
} else
{
posB[j++] = pos[k]; move16();
}
}
switch (i)
{
case 0:
tmp = sub(extract_l(L_shr(L_mult(5, N), 1)), 1); /* ((5*N)-1)) */
index = L_shl(1L, tmp); /* index = 1 << ((5*N)-1); */
tmp = add(shl(N, 1), 1); /* index += quant_3p_3N1(posB[0], posB[1], posB[2], n_1) << ((2*N)+1);*/
tmp2 = L_shl(quant_3p_3N1(posB[0], posB[1], posB[2], n_1), tmp);
index = L_add(index, tmp2);
index = L_add(index, quant_2p_2N1(posB[3], posB[4], N)); /* index += quant_2p_2N1(posB[3], posB[4], N); */
break;
case 1:
tmp = sub(extract_l(L_shr(L_mult(5, N), 1)), 1); /* index = 1 << ((5*N)-1); */
index = L_shl(1L, tmp);
tmp = add(shl(N, 1), 1); /* index += quant_3p_3N1(posB[0], posB[1], posB[2], n_1) <<((2*N)+1); */
tmp2 = L_shl(quant_3p_3N1(posB[0], posB[1], posB[2], n_1), tmp);
index = L_add(index, tmp2);
index = L_add(index, quant_2p_2N1(posB[3], posA[0], N)); /* index += quant_2p_2N1(posB[3], posA[0], N); */
break;
case 2:
tmp = sub(extract_l(L_shr(L_mult(5, N), 1)), 1); /* ((5*N)-1)) */
index = L_shl(1L, tmp); /* index = 1 << ((5*N)-1); */
tmp = add(shl(N, 1), 1); /* index += quant_3p_3N1(posB[0], posB[1], posB[2], n_1) << ((2*N)+1); */
tmp2 = L_shl(quant_3p_3N1(posB[0], posB[1], posB[2], n_1), tmp);
index = L_add(index, tmp2);
index = L_add(index, quant_2p_2N1(posA[0], posA[1], N)); /* index += quant_2p_2N1(posA[0], posA[1], N); */
break;
case 3:
tmp = add(shl(N, 1), 1); /* index = quant_3p_3N1(posA[0], posA[1], posA[2], n_1) << ((2*N)+1); */
index = L_shl(quant_3p_3N1(posA[0], posA[1], posA[2], n_1), tmp);
index = L_add(index, quant_2p_2N1(posB[0], posB[1], N)); /* index += quant_2p_2N1(posB[0], posB[1], N); */
break;
case 4:
tmp = add(shl(N, 1), 1); /* index = quant_3p_3N1(posA[0], posA[1], posA[2], n_1) << ((2*N)+1); */
index = L_shl(quant_3p_3N1(posA[0], posA[1], posA[2], n_1), tmp);
index = L_add(index, quant_2p_2N1(posA[3], posB[0], N)); /* index += quant_2p_2N1(posA[3], posB[0], N); */
break;
case 5:
tmp = add(shl(N, 1), 1); /* index = quant_3p_3N1(posA[0], posA[1], posA[2], n_1) << ((2*N)+1); */
index = L_shl(quant_3p_3N1(posA[0], posA[1], posA[2], n_1), tmp);
index = L_add(index, quant_2p_2N1(posA[3], posA[4], N)); /* index += quant_2p_2N1(posA[3], posA[4], N); */
break;
default:
index = 0;
fprintf(stderr, "Error in function quant_5p_5N\n");
}
return (index);
}
void dec_5p_5N(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 j, n_1, tmp;
Word32 idx;
/*-------------------------------------------------------*
* Decode 5 pulses with 5*N bits: *
*-------------------------------------------------------*/
n_1 = (Word16) (N - 1); move16();
j = add(offset, shl(1, n_1)); /* j = offset + (1 << n_1); */
tmp = add(shl(N, 1), 1); /* idx = (index >> ((2*N)+1)); */
idx = L_shr(index, tmp);
tmp = sub(extract_l(L_shr(L_mult(5, N), 1)), 1); /* ((5*N)-1)) */
test();logic16();
if ((L_shr(index, tmp) & 1) == 0) /* ((index >> ((5*N)-1)) & 1) */
{
dec_3p_3N1(idx, n_1, offset, pos);
dec_2p_2N1(index, N, offset, pos + 3); move16();
} else
{
dec_3p_3N1(idx, n_1, j, pos);
dec_2p_2N1(index, N, offset, pos + 3); move16();
}
return;
}
Word32 quant_6p_6N_2( /* (o) return (6*N)-2 bits */
Word16 pos[], /* (i) position of the pulse 1..6 */
Word16 N) /* (i) number of bits for position */
{
Word16 i, j, k, nb_pos, n_1;
Word16 posA[6], posB[6];
Word32 index;
/* !! N and n_1 are constants -> it doesn't need to be operated by Basic Operators */
n_1 = (Word16) (N - 1); move16();
nb_pos = shl(1, n_1); /* nb_pos = (1<<n_1); */
i = 0; move16();
j = 0; move16();
for (k = 0; k < 6; k++)
{
test();logic16();
if ((pos[k] & nb_pos) == 0)
{
posA[i++] = pos[k]; move16();
} else
{
posB[j++] = pos[k]; move16();
}
}
switch (i)
{
case 0:
index = L_shl(1L, (Word16) (6 * N - 5)); /* index = 1 << ((6*N)-5); */
index = L_add(index, L_shl(quant_5p_5N(posB, n_1), N)); /* index += quant_5p_5N(posB, n_1) << N; */
index = L_add(index, quant_1p_N1(posB[5], n_1)); /* index += quant_1p_N1(posB[5], n_1); */
break;
case 1:
index = L_shl(1L, (Word16) (6 * N - 5)); /* index = 1 << ((6*N)-5); */
index = L_add(index, L_shl(quant_5p_5N(posB, n_1), N)); /* index += quant_5p_5N(posB, n_1) << N; */
index = L_add(index, quant_1p_N1(posA[0], n_1)); /* index += quant_1p_N1(posA[0], n_1); */
break;
case 2:
index = L_shl(1L, (Word16) (6 * N - 5)); /* index = 1 << ((6*N)-5); */
/* index += quant_4p_4N(posB, n_1) << ((2*n_1)+1); */
index = L_add(index, L_shl(quant_4p_4N(posB, n_1), (Word16) (2 * n_1 + 1)));
index = L_add(index, quant_2p_2N1(posA[0], posA[1], n_1)); /* index += quant_2p_2N1(posA[0], posA[1], n_1); */
break;
case 3:
index = L_shl(quant_3p_3N1(posA[0], posA[1], posA[2], n_1), (Word16) (3 * n_1 + 1)); /* index = quant_3p_3N1(posA[0], posA[1], posA[2], n_1) << ((3*n_1)+1); */
index = L_add(index, quant_3p_3N1(posB[0], posB[1], posB[2], n_1)); /* index += quant_3p_3N1(posB[0], posB[1], posB[2], n_1); */
break;
case 4:
i = 2; move16();
index = L_shl(quant_4p_4N(posA, n_1), (Word16) (2 * n_1 + 1)); /* index = quant_4p_4N(posA, n_1) << ((2*n_1)+1); */
index = L_add(index, quant_2p_2N1(posB[0], posB[1], n_1)); /* index += quant_2p_2N1(posB[0], posB[1], n_1); */
break;
case 5:
i = 1; move16();
index = L_shl(quant_5p_5N(posA, n_1), N); /* index = quant_5p_5N(posA, n_1) << N; */
index = L_add(index, quant_1p_N1(posB[0], n_1)); /* index += quant_1p_N1(posB[0], n_1); */
break;
case 6:
i = 0; move16();
index = L_shl(quant_5p_5N(posA, n_1), N); /* index = quant_5p_5N(posA, n_1) << N; */
index = L_add(index, quant_1p_N1(posA[5], n_1)); /* index += quant_1p_N1(posA[5], n_1); */
break;
default:
index = 0;
fprintf(stderr, "Error in function quant_6p_6N_2\n");
}
index = L_add(index, L_shl((L_deposit_l(i) & 3L), (Word16) (6 * N - 4))); logic16();/* index += (i & 3) << ((6*N)-4); */
return (index);
}
void dec_6p_6N_2(Word32 index, Word16 N, Word16 offset, Word16 pos[])
{
Word16 j, n_1, offsetA, offsetB;
n_1 = (Word16) (N - 1); move16();
j = add(offset, shl(1, n_1)); /* j = offset + (1 << n_1); */
/* !! N and n_1 are constants -> it doesn't need to be operated by Basic Operators */
offsetA = offsetB = j; move16();move16();
test();logic16();
if ((L_shr(index, (Word16) (6 * N - 5)) & 1L) == 0)
{ /* if (((index >> ((6*N)-5)) & 1) == 0) */
offsetA = offset; move16();
} else
{
offsetB = offset; move16();
}
test();logic16();
switch (L_shr(index, (Word16) (6 * N - 4)) & 3)
{ /* (index >> ((6*N)-4)) & 3 */
case 0:
dec_5p_5N(L_shr(index, N), n_1, offsetA, pos); /* dec_5p_5N(index>>N, n_1, offsetA, pos); */
dec_1p_N1(index, n_1, offsetA, pos + 5); move16();
break;
case 1:
dec_5p_5N(L_shr(index, N), n_1, offsetA, pos); /* dec_5p_5N(index>>N, n_1, offsetA, pos); */
dec_1p_N1(index, n_1, offsetB, pos + 5); move16();
break;
case 2:
dec_4p_4N(L_shr(index, (Word16) (2 * n_1 + 1)), n_1, offsetA, pos); /* dec_4p_4N(index>>((2*n_1)+1 ), n_1, offsetA, pos); */
dec_2p_2N1(index, n_1, offsetB, pos + 4); move16();
break;
case 3:
dec_3p_3N1(L_shr(index, (Word16) (3 * n_1 + 1)), n_1, offset, pos); /* dec_3p_3N1(index>>((3*n_1)+ 1), n_1, offset, pos); */
dec_3p_3N1(index, n_1, j, pos + 3);move16();
break;
}
return;
}