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more stereo simplifications

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This commit is contained in:
Jean-Marc Valin 2009-10-03 00:33:16 -04:00
parent abd67230c1
commit 40fc679331
1 changed files with 29 additions and 29 deletions
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58
libcelt/bands.c
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@ -348,7 +348,7 @@ static void stereo_band_mix(const CELTMode *m, celt_norm_t *X, celt_norm_t *Y, c
a1 = DIV32_16(SHL32(EXTEND32(left),14),norm); a1 = DIV32_16(SHL32(EXTEND32(left),14),norm);
a2 = dir*DIV32_16(SHL32(EXTEND32(right),14),norm); a2 = dir*DIV32_16(SHL32(EXTEND32(right),14),norm);
} }
for (j=eBands[i];j<eBands[i+1];j++) for (j=0;j<eBands[i+1]-eBands[i];j++)
{ {
celt_norm_t r, l; celt_norm_t r, l;
l = X[j]; l = X[j];
@ -511,8 +511,6 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
norm = _norm; norm = _norm;
balance = 0; balance = 0;
X = _X;
Y = _X+eBands[m->nbEBands+1];
for (i=0;i<m->nbEBands;i++) for (i=0;i<m->nbEBands;i++)
{ {
int c; int c;
@ -527,6 +525,8 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
int mbits, sbits, delta; int mbits, sbits, delta;
int qalloc; int qalloc;
X = _X+eBands[i];
Y = X+eBands[m->nbEBands+1];
BPbits = m->bits; BPbits = m->bits;
N = eBands[i+1]-eBands[i]; N = eBands[i+1]-eBands[i];
@ -552,8 +552,8 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
stereo_band_mix(m, X, Y, bandE, qb==0, i, 1); stereo_band_mix(m, X, Y, bandE, qb==0, i, 1);
mid = renormalise_vector(X+eBands[i], Q15ONE, N, 1); mid = renormalise_vector(X, Q15ONE, N, 1);
side = renormalise_vector(Y+eBands[i], Q15ONE, N, 1); side = renormalise_vector(Y, Q15ONE, N, 1);
#ifdef FIXED_POINT #ifdef FIXED_POINT
itheta = MULT16_16_Q15(QCONST16(0.63662,15),celt_atan2p(side, mid)); itheta = MULT16_16_Q15(QCONST16(0.63662,15),celt_atan2p(side, mid));
#else #else
@ -601,8 +601,8 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
c = itheta > 8192 ? 1 : 0; c = itheta > 8192 ? 1 : 0;
c2 = 1-c; c2 = 1-c;
x2 = X+eBands[i]; x2 = X;
y2 = Y+eBands[i]; y2 = Y;
if (c==0) if (c==0)
{ {
v[0] = x2[0]; v[0] = x2[0];
@ -686,15 +686,15 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
if (q1 > 0) { if (q1 > 0) {
int spread = fold ? B : 0; int spread = fold ? B : 0;
alg_quant(X+eBands[i], N, q1, spread, enc); alg_quant(X, N, q1, spread, enc);
} else { } else {
intra_fold(m, eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B); intra_fold(m, eBands[i+1]-eBands[i], norm, X, eBands[i], B);
} }
if (q2 > 0) { if (q2 > 0) {
int spread = fold ? B : 0; int spread = fold ? B : 0;
alg_quant(Y+eBands[i], N, q2, spread, enc); alg_quant(Y, N, q2, spread, enc);
} else } else
for (j=eBands[i];j<eBands[i+1];j++) for (j=0;j<N;j++)
Y[j] = 0; Y[j] = 0;
} }
@ -708,16 +708,16 @@ void quant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t *b
side = (1./32768)*iside; side = (1./32768)*iside;
#endif #endif
for (j=0;j<N;j++) for (j=0;j<N;j++)
norm[eBands[i]+j] = MULT16_16_Q15(n,X[eBands[i]+j]); norm[eBands[i]+j] = MULT16_16_Q15(n,X[j]);
for (j=0;j<N;j++) for (j=0;j<N;j++)
X[eBands[i]+j] = MULT16_16_Q15(X[eBands[i]+j], mid); X[j] = MULT16_16_Q15(X[j], mid);
for (j=0;j<N;j++) for (j=0;j<N;j++)
Y[eBands[i]+j] = MULT16_16_Q15(Y[eBands[i]+j], side); Y[j] = MULT16_16_Q15(Y[j], side);
stereo_band_mix(m, X, Y, bandE, 0, i, -1); stereo_band_mix(m, X, Y, bandE, 0, i, -1);
renormalise_vector(X+eBands[i], Q15ONE, N, 1); renormalise_vector(X, Q15ONE, N, 1);
renormalise_vector(Y+eBands[i], Q15ONE, N, 1); renormalise_vector(Y, Q15ONE, N, 1);
} }
RESTORE_STACK; RESTORE_STACK;
} }
@ -803,8 +803,6 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t
norm = _norm; norm = _norm;
balance = 0; balance = 0;
X = _X;
Y = _X+eBands[m->nbEBands+1];
for (i=0;i<m->nbEBands;i++) for (i=0;i<m->nbEBands;i++)
{ {
int c; int c;
@ -819,6 +817,8 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t
int mbits, sbits, delta; int mbits, sbits, delta;
int qalloc; int qalloc;
X = _X+eBands[i];
Y = X+eBands[m->nbEBands+1];
BPbits = m->bits; BPbits = m->bits;
N = eBands[i+1]-eBands[i]; N = eBands[i+1]-eBands[i];
@ -882,8 +882,8 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t
c = itheta > 8192 ? 1 : 0; c = itheta > 8192 ? 1 : 0;
c2 = 1-c; c2 = 1-c;
x2 = X+eBands[i]; x2 = X;
y2 = Y+eBands[i]; y2 = Y;
v[0] = x2[c]; v[0] = x2[c];
v[1] = y2[c]; v[1] = y2[c];
w[0] = x2[c2]; w[0] = x2[c2];
@ -953,15 +953,15 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t
if (q1 > 0) if (q1 > 0)
{ {
int spread = fold ? B : 0; int spread = fold ? B : 0;
alg_unquant(X+eBands[i], N, q1, spread, dec); alg_unquant(X, N, q1, spread, dec);
} else } else
intra_fold(m, eBands[i+1]-eBands[i], norm, X+eBands[i], eBands[i], B); intra_fold(m, eBands[i+1]-eBands[i], norm, X, eBands[i], B);
if (q2 > 0) if (q2 > 0)
{ {
int spread = fold ? B : 0; int spread = fold ? B : 0;
alg_unquant(Y+eBands[i], N, q2, spread, dec); alg_unquant(Y, N, q2, spread, dec);
} else } else
for (j=eBands[i];j<eBands[i+1];j++) for (j=0;j<N;j++)
Y[j] = 0; Y[j] = 0;
/*orthogonalize(X+C*eBands[i], X+C*eBands[i]+N, N);*/ /*orthogonalize(X+C*eBands[i], X+C*eBands[i]+N, N);*/
} }
@ -975,16 +975,16 @@ void unquant_bands_stereo(const CELTMode *m, celt_norm_t *_X, const celt_ener_t
side = (1./32768)*iside; side = (1./32768)*iside;
#endif #endif
for (j=0;j<N;j++) for (j=0;j<N;j++)
norm[eBands[i]+j] = MULT16_16_Q15(n,X[eBands[i]+j]); norm[eBands[i]+j] = MULT16_16_Q15(n,X[j]);
for (j=0;j<N;j++) for (j=0;j<N;j++)
X[eBands[i]+j] = MULT16_16_Q15(X[eBands[i]+j], mid); X[j] = MULT16_16_Q15(X[j], mid);
for (j=0;j<N;j++) for (j=0;j<N;j++)
Y[eBands[i]+j] = MULT16_16_Q15(Y[eBands[i]+j], side); Y[j] = MULT16_16_Q15(Y[j], side);
stereo_band_mix(m, X, Y, bandE, 0, i, -1); stereo_band_mix(m, X, Y, bandE, 0, i, -1);
renormalise_vector(X+eBands[i], Q15ONE, N, 1); renormalise_vector(X, Q15ONE, N, 1);
renormalise_vector(Y+eBands[i], Q15ONE, N, 1); renormalise_vector(Y, Q15ONE, N, 1);
} }
RESTORE_STACK; RESTORE_STACK;
} }