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Commit 4d59de39 authored by Rostislav Pehlivanov's avatar Rostislav Pehlivanov
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opus_pvq: minor cleanups 

Removes unneeded variables, renames confusing and innacurate variables
and rewrites and slightly optimizes hadamard interleave/deinterleave
functions.
Signed-off-by: 's avatarRostislav Pehlivanov <atomnuker@gmail.com>
parent 8de3458a
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Showing with 112 additions and 144 deletions
libavcodec/opus_pvq.c
View file @ 4d59de39
......@@ -33,7 +33,7 @@ static inline int16_t celt_cos(int16_t x)
{
x = (MUL16(x, x) + 4096) >> 13;
x = (32767-x) + ROUND_MUL16(x, (-7651 + ROUND_MUL16(x, (8277 + ROUND_MUL16(-626, x)))));
return 1+x;
return x + 1;
}
static inline int celt_log2tan(int isin, int icos)
......@@ -163,7 +163,7 @@ static inline uint32_t celt_extract_collapse_mask(const int *iy, uint32_t N, uin
collapse_mask = 0;
for (i = 0; i < B; i++)
for (j = 0; j < N0; j++)
collapse_mask |= (iy[i*N0+j]!=0)<<i;
collapse_mask |= (!!iy[i*N0+j]) << i;
return collapse_mask;
}
......@@ -173,7 +173,7 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
float xp = 0, side = 0;
float E[2];
float mid2;
float t, gain[2];
float gain[2];
/* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
for (i = 0; i < N; i++) {
......@@ -192,10 +192,8 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
return;
}
t = E[0];
gain[0] = 1.0f / sqrtf(t);
t = E[1];
gain[1] = 1.0f / sqrtf(t);
gain[0] = 1.0f / sqrtf(E[0]);
gain[1] = 1.0f / sqrtf(E[1]);
for (i = 0; i < N; i++) {
float value[2];
......@@ -210,43 +208,27 @@ static inline void celt_stereo_merge(float *X, float *Y, float mid, int N)
static void celt_interleave_hadamard(float *tmp, float *X, int N0,
int stride, int hadamard)
{
int i, j;
int N = N0*stride;
int i, j, N = N0*stride;
const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
if (hadamard) {
const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[j*stride+i] = X[ordery[i]*N0+j];
} else {
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[j*stride+i] = X[i*N0+j];
}
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[j*stride+i] = X[order[i]*N0+j];
for (i = 0; i < N; i++)
X[i] = tmp[i];
memcpy(X, tmp, N*sizeof(float));
}
static void celt_deinterleave_hadamard(float *tmp, float *X, int N0,
int stride, int hadamard)
{
int i, j;
int N = N0*stride;
int i, j, N = N0*stride;
const uint8_t *order = &ff_celt_hadamard_order[hadamard ? stride - 2 : 30];
if (hadamard) {
const uint8_t *ordery = ff_celt_hadamard_ordery + stride - 2;
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[ordery[i]*N0+j] = X[j*stride+i];
} else {
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[i*N0+j] = X[j*stride+i];
}
for (i = 0; i < stride; i++)
for (j = 0; j < N0; j++)
tmp[order[i]*N0+j] = X[j*stride+i];
for (i = 0; i < N; i++)
X[i] = tmp[i];
memcpy(X, tmp, N*sizeof(float));
}
static void celt_haar1(float *X, int N0, int stride)
......@@ -264,11 +246,11 @@ static void celt_haar1(float *X, int N0, int stride)
}
static inline int celt_compute_qn(int N, int b, int offset, int pulse_cap,
int dualstereo)
int stereo)
{
int qn, qb;
int N2 = 2 * N - 1;
if (dualstereo && N == 2)
if (stereo && N == 2)
N2--;
/* The upper limit ensures that in a stereo split with itheta==16384, we'll
......@@ -471,12 +453,13 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
float *lowband, int duration, float *lowband_out, int level,
float gain, float *lowband_scratch, int fill)
{
int i;
const uint8_t *cache;
int dualstereo, split;
int stereo = !!Y, split = !!Y;
int imid = 0, iside = 0;
uint32_t N0 = N;
int N_B;
int N_B0;
int N_B = N / blocks;
int N_B0 = N_B;
int B0 = blocks;
int time_divide = 0;
int recombine = 0;
......@@ -485,14 +468,10 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
int longblocks = (B0 == 1);
uint32_t cm = 0;
N_B0 = N_B = N / blocks;
split = dualstereo = (Y != NULL);
if (N == 1) {
/* special case for one sample */
int i;
float *x = X;
for (i = 0; i <= dualstereo; i++) {
for (i = 0; i <= stereo; i++) {
int sign = 0;
if (f->remaining2 >= 1<<3) {
sign = ff_opus_rc_get_raw(rc, 1);
......@@ -507,7 +486,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
return 1;
}
if (!dualstereo && level == 0) {
if (!stereo && level == 0) {
int tf_change = f->tf_change[band];
int k;
if (tf_change > 0)
......@@ -516,9 +495,8 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
if (lowband &&
(recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
int j;
for (j = 0; j < N; j++)
lowband_scratch[j] = lowband[j];
for (i = 0; i < N; i++)
lowband_scratch[i] = lowband[i];
lowband = lowband_scratch;
}
......@@ -552,7 +530,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* If we need 1.5 more bit than we can produce, split the band in two. */
cache = ff_celt_cache_bits +
ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
if (!dualstereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
N >>= 1;
Y = X + N;
split = 1;
......@@ -574,24 +552,24 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Decide on the resolution to give to the split parameter theta */
pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
offset = (pulse_cap >> 1) - (dualstereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
CELT_QTHETA_OFFSET);
qn = (dualstereo && band >= f->intensity_stereo) ? 1 :
celt_compute_qn(N, b, offset, pulse_cap, dualstereo);
qn = (stereo && band >= f->intensity_stereo) ? 1 :
celt_compute_qn(N, b, offset, pulse_cap, stereo);
tell = opus_rc_tell_frac(rc);
if (qn != 1) {
/* Entropy coding of the angle. We use a uniform pdf for the
time split, a step for stereo, and a triangular one for the rest. */
if (dualstereo && N > 2)
if (stereo && N > 2)
itheta = ff_opus_rc_dec_uint_step(rc, qn/2);
else if (dualstereo || B0 > 1)
else if (stereo || B0 > 1)
itheta = ff_opus_rc_dec_uint(rc, qn+1);
else
itheta = ff_opus_rc_dec_uint_tri(rc, qn);
itheta = itheta * 16384 / qn;
/* NOTE: Renormalising X and Y *may* help fixed-point a bit at very high rate.
Let's do that at higher complexity */
} else if (dualstereo) {
} else if (stereo) {
inv = (b > 2 << 3 && f->remaining2 > 2 << 3) ? ff_opus_rc_dec_log(rc, 2) : 0;
itheta = 0;
}
......@@ -623,7 +601,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* This is a special case for N=2 that only works for stereo and takes
advantage of the fact that mid and side are orthogonal to encode
the side with just one bit. */
if (N == 2 && dualstereo) {
if (N == 2 && stereo) {
int c;
int sign = 0;
float tmp;
......@@ -668,7 +646,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Give more bits to low-energy MDCTs than they would
* otherwise deserve */
if (B0 > 1 && !dualstereo && (itheta & 0x3fff)) {
if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
if (itheta > 8192)
/* Rough approximation for pre-echo masking */
delta -= delta >> (4 - duration);
......@@ -681,12 +659,12 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
sbits = b - mbits;
f->remaining2 -= qalloc;
if (lowband && !dualstereo)
if (lowband && !stereo)
next_lowband2 = lowband + N; /* >32-bit split case */
/* Only stereo needs to pass on lowband_out.
* Otherwise, it's handled at the end */
if (dualstereo)
if (stereo)
next_lowband_out1 = lowband_out;
else
next_level = level + 1;
......@@ -697,7 +675,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
* because we need the normalized mid for folding later */
cm = ff_celt_decode_band(f, rc, band, X, NULL, N, mbits, blocks,
lowband, duration, next_lowband_out1,
next_level, dualstereo ? 1.0f : (gain * mid),
next_level, stereo ? 1.0f : (gain * mid),
lowband_scratch, fill);
rebalance = mbits - (rebalance - f->remaining2);
......@@ -709,14 +687,14 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
cm |= ff_celt_decode_band(f, rc, band, Y, NULL, N, sbits, blocks,
next_lowband2, duration, NULL,
next_level, gain * side, NULL,
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
} else {
/* For a stereo split, the high bits of fill are always zero,
* so no folding will be done to the side. */
cm = ff_celt_decode_band(f, rc, band, Y, NULL, N, sbits, blocks,
next_lowband2, duration, NULL,
next_level, gain * side, NULL,
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
rebalance = sbits - (rebalance - f->remaining2);
if (rebalance > 3 << 3 && itheta != 16384)
......@@ -726,7 +704,7 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
* we need the normalized mid for folding later */
cm |= ff_celt_decode_band(f, rc, band, X, NULL, N, mbits, blocks,
lowband, duration, next_lowband_out1,
next_level, dualstereo ? 1.0f : (gain * mid),
next_level, stereo ? 1.0f : (gain * mid),
lowband_scratch, fill);
}
}
......@@ -749,47 +727,44 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
f->spread, blocks, gain);
} else {
/* If there's no pulse, fill the band anyway */
int j;
uint32_t cm_mask = (1 << blocks) - 1;
fill &= cm_mask;
if (!fill) {
for (j = 0; j < N; j++)
X[j] = 0.0f;
} else {
if (fill) {
if (!lowband) {
/* Noise */
for (j = 0; j < N; j++)
X[j] = (((int32_t)celt_rng(f)) >> 20);
for (i = 0; i < N; i++)
X[i] = (((int32_t)celt_rng(f)) >> 20);
cm = cm_mask;
} else {
/* Folded spectrum */
for (j = 0; j < N; j++) {
for (i = 0; i < N; i++) {
/* About 48 dB below the "normal" folding level */
X[j] = lowband[j] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
}
cm = fill;
}
celt_renormalize_vector(X, N, gain);
} else {
memset(X, 0, N*sizeof(float));
}
}
}
/* This code is used by the decoder and by the resynthesis-enabled encoder */
if (dualstereo) {
int j;
if (N != 2)
if (stereo) {
if (N > 2)
celt_stereo_merge(X, Y, mid, N);
if (inv) {
for (j = 0; j < N; j++)
Y[j] *= -1;
for (i = 0; i < N; i++)
Y[i] *= -1;
}
} else if (level == 0) {
int k;
/* Undo the sample reorganization going from time order to frequency order */
if (B0 > 1)
celt_interleave_hadamard(f->scratch, X, N_B>>recombine,
B0<<recombine, longblocks);
celt_interleave_hadamard(f->scratch, X, N_B >> recombine,
B0 << recombine, longblocks);
/* Undo time-freq changes that we did earlier */
N_B = N_B0;
......@@ -809,10 +784,9 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Scale output for later folding */
if (lowband_out) {
int j;
float n = sqrtf(N0);
for (j = 0; j < N0; j++)
lowband_out[j] = n * X[j];
for (i = 0; i < N0; i++)
lowband_out[i] = n * X[i];
}
cm = av_mod_uintp2(cm, blocks);
}
......@@ -824,15 +798,17 @@ uint32_t ff_celt_decode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
* big impact on the entire quantization and especially huge on transients */
static int celt_calc_theta(const float *X, const float *Y, int coupling, int N)
{
int j;
int i;
float e[2] = { 0.0f, 0.0f };
for (j = 0; j < N; j++) {
if (coupling) { /* Coupling case */
e[0] += (X[j] + Y[j])*(X[j] + Y[j]);
e[1] += (X[j] - Y[j])*(X[j] - Y[j]);
} else {
e[0] += X[j]*X[j];
e[1] += Y[j]*Y[j];
if (coupling) { /* Coupling case */
for (i = 0; i < N; i++) {
e[0] += (X[i] + Y[i])*(X[i] + Y[i]);
e[1] += (X[i] - Y[i])*(X[i] - Y[i]);
}
} else {
for (i = 0; i < N; i++) {
e[0] += X[i]*X[i];
e[1] += Y[i]*Y[i];
}
}
return lrintf(32768.0f*atan2f(sqrtf(e[1]), sqrtf(e[0]))/M_PI);
......@@ -851,11 +827,10 @@ static void celt_stereo_is_decouple(float *X, float *Y, float e_l, float e_r, in
static void celt_stereo_ms_decouple(float *X, float *Y, int N)
{
int i;
const float decouple_norm = 1.0f/sqrtf(1.0f + 1.0f);
for (i = 0; i < N; i++) {
const float Xret = X[i];
X[i] = (X[i] + Y[i])*decouple_norm;
Y[i] = (Y[i] - Xret)*decouple_norm;
X[i] = (X[i] + Y[i])*M_SQRT1_2;
Y[i] = (Y[i] - Xret)*M_SQRT1_2;
}
}
......@@ -864,8 +839,9 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
float *lowband, int duration, float *lowband_out, int level,
float gain, float *lowband_scratch, int fill)
{
int i;
const uint8_t *cache;
int dualstereo, split;
int stereo = !!Y, split = !!Y;
int imid = 0, iside = 0;
uint32_t N0 = N;
int N_B = N / blocks;
......@@ -878,13 +854,10 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
int longblocks = (B0 == 1);
uint32_t cm = 0;
split = dualstereo = (Y != NULL);
if (N == 1) {
/* special case for one sample - the decoder's output will be +- 1.0f!!! */
int i;
float *x = X;
for (i = 0; i <= dualstereo; i++) {
for (i = 0; i <= stereo; i++) {
if (f->remaining2 >= 1<<3) {
ff_opus_rc_put_raw(rc, x[0] < 0, 1);
f->remaining2 -= 1 << 3;
......@@ -898,7 +871,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
return 1;
}
if (!dualstereo && level == 0) {
if (!stereo && level == 0) {
int tf_change = f->tf_change[band];
int k;
if (tf_change > 0)
......@@ -907,9 +880,8 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
if (lowband &&
(recombine || ((N_B & 1) == 0 && tf_change < 0) || B0 > 1)) {
int j;
for (j = 0; j < N; j++)
lowband_scratch[j] = lowband[j];
for (i = 0; i < N; i++)
lowband_scratch[i] = lowband[i];
lowband = lowband_scratch;
}
......@@ -941,7 +913,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* If we need 1.5 more bit than we can produce, split the band in two. */
cache = ff_celt_cache_bits +
ff_celt_cache_index[(duration + 1) * CELT_MAX_BANDS + band];
if (!dualstereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
if (!stereo && duration >= 0 && b > cache[cache[0]] + 12 && N > 2) {
N >>= 1;
Y = X + N;
split = 1;
......@@ -953,7 +925,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
if (split) {
int qn;
int itheta = celt_calc_theta(X, Y, dualstereo, N);
int itheta = celt_calc_theta(X, Y, stereo, N);
int mbits, sbits, delta;
int qalloc;
int pulse_cap;
......@@ -963,10 +935,10 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Decide on the resolution to give to the split parameter theta */
pulse_cap = ff_celt_log_freq_range[band] + duration * 8;
offset = (pulse_cap >> 1) - (dualstereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
offset = (pulse_cap >> 1) - (stereo && N == 2 ? CELT_QTHETA_OFFSET_TWOPHASE :
CELT_QTHETA_OFFSET);
qn = (dualstereo && band >= f->intensity_stereo) ? 1 :
celt_compute_qn(N, b, offset, pulse_cap, dualstereo);
qn = (stereo && band >= f->intensity_stereo) ? 1 :
celt_compute_qn(N, b, offset, pulse_cap, stereo);
tell = opus_rc_tell_frac(rc);
if (qn != 1) {
......@@ -975,27 +947,26 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Entropy coding of the angle. We use a uniform pdf for the
* time split, a step for stereo, and a triangular one for the rest. */
if (dualstereo && N > 2)
if (stereo && N > 2)
ff_opus_rc_enc_uint_step(rc, itheta, qn / 2);
else if (dualstereo || B0 > 1)
else if (stereo || B0 > 1)
ff_opus_rc_enc_uint(rc, itheta, qn + 1);
else
ff_opus_rc_enc_uint_tri(rc, itheta, qn);
itheta = itheta * 16384 / qn;
if (dualstereo) {
if (stereo) {
if (itheta == 0)
celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
f->block[1].lin_energy[band], N);
else
celt_stereo_ms_decouple(X, Y, N);
}
} else if (dualstereo) {
} else if (stereo) {
inv = itheta > 8192;
if (inv) {
int j;
for (j = 0; j < N; j++)
Y[j] = -Y[j];
for (i = 0; i < N; i++)
Y[i] *= -1;
}
celt_stereo_is_decouple(X, Y, f->block[0].lin_energy[band],
f->block[1].lin_energy[band], N);
......@@ -1036,7 +1007,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* This is a special case for N=2 that only works for stereo and takes
advantage of the fact that mid and side are orthogonal to encode
the side with just one bit. */
if (N == 2 && dualstereo) {
if (N == 2 && stereo) {
int c;
int sign = 0;
float tmp;
......@@ -1083,7 +1054,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Give more bits to low-energy MDCTs than they would
* otherwise deserve */
if (B0 > 1 && !dualstereo && (itheta & 0x3fff)) {
if (B0 > 1 && !stereo && (itheta & 0x3fff)) {
if (itheta > 8192)
/* Rough approximation for pre-echo masking */
delta -= delta >> (4 - duration);
......@@ -1096,12 +1067,12 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
sbits = b - mbits;
f->remaining2 -= qalloc;
if (lowband && !dualstereo)
if (lowband && !stereo)
next_lowband2 = lowband + N; /* >32-bit split case */
/* Only stereo needs to pass on lowband_out.
* Otherwise, it's handled at the end */
if (dualstereo)
if (stereo)
next_lowband_out1 = lowband_out;
else
next_level = level + 1;
......@@ -1112,7 +1083,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
* because we need the normalized mid for folding later */
cm = ff_celt_encode_band(f, rc, band, X, NULL, N, mbits, blocks,
lowband, duration, next_lowband_out1,
next_level, dualstereo ? 1.0f : (gain * mid),
next_level, stereo ? 1.0f : (gain * mid),
lowband_scratch, fill);
rebalance = mbits - (rebalance - f->remaining2);
......@@ -1124,14 +1095,14 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
cm |= ff_celt_encode_band(f, rc, band, Y, NULL, N, sbits, blocks,
next_lowband2, duration, NULL,
next_level, gain * side, NULL,
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
} else {
/* For a stereo split, the high bits of fill are always zero,
* so no folding will be done to the side. */
cm = ff_celt_encode_band(f, rc, band, Y, NULL, N, sbits, blocks,
next_lowband2, duration, NULL,
next_level, gain * side, NULL,
fill >> blocks) << ((B0 >> 1) & (dualstereo - 1));
fill >> blocks) << ((B0 >> 1) & (stereo - 1));
rebalance = sbits - (rebalance - f->remaining2);
if (rebalance > 3 << 3 && itheta != 16384)
......@@ -1141,7 +1112,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
* we need the normalized mid for folding later */
cm |= ff_celt_encode_band(f, rc, band, X, NULL, N, mbits, blocks,
lowband, duration, next_lowband_out1,
next_level, dualstereo ? 1.0f : (gain * mid),
next_level, stereo ? 1.0f : (gain * mid),
lowband_scratch, fill);
}
}
......@@ -1164,39 +1135,36 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
f->spread, blocks, gain);
} else {
/* If there's no pulse, fill the band anyway */
int j;
uint32_t cm_mask = (1 << blocks) - 1;
fill &= cm_mask;
if (!fill) {
for (j = 0; j < N; j++)
X[j] = 0.0f;
} else {
if (fill) {
if (!lowband) {
/* Noise */
for (j = 0; j < N; j++)
X[j] = (((int32_t)celt_rng(f)) >> 20);
for (i = 0; i < N; i++)
X[i] = (((int32_t)celt_rng(f)) >> 20);
cm = cm_mask;
} else {
/* Folded spectrum */
for (j = 0; j < N; j++) {
for (i = 0; i < N; i++) {
/* About 48 dB below the "normal" folding level */
X[j] = lowband[j] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
X[i] = lowband[i] + (((celt_rng(f)) & 0x8000) ? 1.0f / 256 : -1.0f / 256);
}
cm = fill;
}
celt_renormalize_vector(X, N, gain);
} else {
memset(X, 0, N*sizeof(float));
}
}
}
/* This code is used by the decoder and by the resynthesis-enabled encoder */
if (dualstereo) {
int j;
if (N != 2)
if (stereo) {
if (N > 2)
celt_stereo_merge(X, Y, mid, N);
if (inv) {
for (j = 0; j < N; j++)
Y[j] *= -1;
for (i = 0; i < N; i++)
Y[i] *= -1;
}
} else if (level == 0) {
int k;
......@@ -1204,7 +1172,7 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Undo the sample reorganization going from time order to frequency order */
if (B0 > 1)
celt_interleave_hadamard(f->scratch, X, N_B >> recombine,
B0<<recombine, longblocks);
B0 << recombine, longblocks);
/* Undo time-freq changes that we did earlier */
N_B = N_B0;
......@@ -1224,10 +1192,9 @@ uint32_t ff_celt_encode_band(CeltFrame *f, OpusRangeCoder *rc, const int band,
/* Scale output for later folding */
if (lowband_out) {
int j;
float n = sqrtf(N0);
for (j = 0; j < N0; j++)
lowband_out[j] = n * X[j];
for (i = 0; i < N0; i++)
lowband_out[i] = n * X[i];
}
cm = av_mod_uintp2(cm, blocks);
}
......
libavcodec/opustab.c
View file @ 4d59de39
......@@ -930,11 +930,12 @@ const uint8_t ff_celt_bit_deinterleave[] = {
0xC0, 0xC3, 0xCC, 0xCF, 0xF0, 0xF3, 0xFC, 0xFF
};
const uint8_t ff_celt_hadamard_ordery[] = {
const uint8_t ff_celt_hadamard_order[] = {
1, 0,
3, 0, 2, 1,
7, 0, 4, 3, 6, 1, 5, 2,
15, 0, 8, 7, 12, 3, 11, 4, 14, 1, 9, 6, 13, 2, 10, 5
15, 0, 8, 7, 12, 3, 11, 4, 14, 1, 9, 6, 13, 2, 10, 5,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
};
const uint16_t ff_celt_qn_exp2[] = {
......
libavcodec/opustab.h
View file @ 4d59de39
......@@ -146,7 +146,7 @@ extern const uint8_t ff_celt_log2_frac[];
extern const uint8_t ff_celt_bit_interleave[];
extern const uint8_t ff_celt_bit_deinterleave[];
extern const uint8_t ff_celt_hadamard_ordery[];
extern const uint8_t ff_celt_hadamard_order[];
extern const uint16_t ff_celt_qn_exp2[];
extern const uint32_t ff_celt_pvq_u[1272];
......
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