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ffmpeg.wasm-core
Commit 42d3fbb3 authored by Måns Rullgård's avatar Måns Rullgård
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AAC: use new dsputil functions 

Originally committed as revision 19956 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 53b57211
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Showing with 33 additions and 38 deletions
libavcodec/aac.c
View file @ 42d3fbb3
......@@ -861,18 +861,25 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
for (group = 0; group < ics->group_len[g]; group++) {
float scale;
float band_energy = 0;
float *cf = coef + group * 128;
int len = offsets[i+1] - offsets[i];
for (k = offsets[i]; k < offsets[i + 1]; k++) {
ac->random_state = lcg_random(ac->random_state);
coef[group * 128 + k] = ac->random_state;
band_energy += coef[group * 128 + k] * coef[group * 128 + k];
}
band_energy += ac->dsp.scalarproduct_float(cf, cf, len);
scale = sf[idx] / sqrtf(band_energy);
for (k = offsets[i]; k < offsets[i + 1]; k++) {
coef[group * 128 + k] *= scale;
}
ac->dsp.vector_fmul_scalar(cf, cf, scale, len);
}
} else {
for (group = 0; group < ics->group_len[g]; group++) {
const float *vq[96];
const float **vqp = vq;
float *cf = coef + (group << 7) + offsets[i];
int len = offsets[i + 1] - offsets[i];
for (k = offsets[i]; k < offsets[i + 1]; k += dim) {
const int index = get_vlc2(gb, vlc_spectral[cur_band_type - 1].table, 6, 3);
const int coef_tmp_idx = (group << 7) + k;
......@@ -885,6 +892,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
return -1;
}
vq_ptr = &ff_aac_codebook_vectors[cur_band_type - 1][index * dim];
*vqp++ = vq_ptr;
if (is_cb_unsigned) {
if (vq_ptr[0])
coef[coef_tmp_idx ] = sign_lookup[get_bits1(gb)];
......@@ -912,29 +920,18 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
} else
coef[coef_tmp_idx + j] *= vq_ptr[j];
}
} else {
coef[coef_tmp_idx ] *= vq_ptr[0];
coef[coef_tmp_idx + 1] *= vq_ptr[1];
if (dim == 4) {
coef[coef_tmp_idx + 2] *= vq_ptr[2];
coef[coef_tmp_idx + 3] *= vq_ptr[3];
}
}
} else {
coef[coef_tmp_idx ] = vq_ptr[0];
coef[coef_tmp_idx + 1] = vq_ptr[1];
if (dim == 4) {
coef[coef_tmp_idx + 2] = vq_ptr[2];
coef[coef_tmp_idx + 3] = vq_ptr[3];
}
}
coef[coef_tmp_idx ] *= sf[idx];
coef[coef_tmp_idx + 1] *= sf[idx];
if (dim == 4) {
coef[coef_tmp_idx + 2] *= sf[idx];
coef[coef_tmp_idx + 3] *= sf[idx];
}
}
if (is_cb_unsigned && cur_band_type != ESC_BT) {
ac->dsp.vector_fmul_sv_scalar[dim>>2](
cf, cf, vq, sf[idx], len);
} else if (is_cb_unsigned && cur_band_type == ESC_BT) {
ac->dsp.vector_fmul_scalar(cf, cf, sf[idx], len);
} else { /* !is_cb_unsigned */
ac->dsp.sv_fmul_scalar[dim>>2](cf, vq, sf[idx], len);
}
}
}
}
......@@ -1103,23 +1100,21 @@ static int decode_ics(AACContext *ac, SingleChannelElement *sce,
/**
* Mid/Side stereo decoding; reference: 4.6.8.1.3.
*/
static void apply_mid_side_stereo(ChannelElement *cpe)
static void apply_mid_side_stereo(AACContext *ac, ChannelElement *cpe)
{
const IndividualChannelStream *ics = &cpe->ch[0].ics;
float *ch0 = cpe->ch[0].coeffs;
float *ch1 = cpe->ch[1].coeffs;
int g, i, k, group, idx = 0;
int g, i, group, idx = 0;
const uint16_t *offsets = ics->swb_offset;
for (g = 0; g < ics->num_window_groups; g++) {
for (i = 0; i < ics->max_sfb; i++, idx++) {
if (cpe->ms_mask[idx] &&
cpe->ch[0].band_type[idx] < NOISE_BT && cpe->ch[1].band_type[idx] < NOISE_BT) {
for (group = 0; group < ics->group_len[g]; group++) {
for (k = offsets[i]; k < offsets[i + 1]; k++) {
float tmp = ch0[group * 128 + k] - ch1[group * 128 + k];
ch0[group * 128 + k] += ch1[group * 128 + k];
ch1[group * 128 + k] = tmp;
}
ac->dsp.butterflies_float(ch0 + group * 128 + offsets[i],
ch1 + group * 128 + offsets[i],
offsets[i+1] - offsets[i]);
}
}
}
......@@ -1200,7 +1195,7 @@ static int decode_cpe(AACContext *ac, GetBitContext *gb, ChannelElement *cpe)
if (common_window) {
if (ms_present)
apply_mid_side_stereo(cpe);
apply_mid_side_stereo(ac, cpe);
if (ac->m4ac.object_type == AOT_AAC_MAIN) {
apply_prediction(ac, &cpe->ch[0]);
apply_prediction(ac, &cpe->ch[1]);
......
libavcodec/aactab.c
View file @ 42d3fbb3
......@@ -409,7 +409,7 @@ const uint16_t ff_aac_spectral_sizes[11] = {
* 64.0f is a special value indicating the existence of an escape code in the
* bitstream.
*/
static const float codebook_vector0[324] = {
static const DECLARE_ALIGNED_16(float, codebook_vector0[324]) = {
-1.0000000, -1.0000000, -1.0000000, -1.0000000,
-1.0000000, -1.0000000, -1.0000000, 0.0000000,
-1.0000000, -1.0000000, -1.0000000, 1.0000000,
......@@ -493,7 +493,7 @@ static const float codebook_vector0[324] = {
1.0000000, 1.0000000, 1.0000000, 1.0000000,
};
static const float codebook_vector2[324] = {
static const DECLARE_ALIGNED_16(float, codebook_vector2[324]) = {
0.0000000, 0.0000000, 0.0000000, 0.0000000,
0.0000000, 0.0000000, 0.0000000, 1.0000000,
0.0000000, 0.0000000, 0.0000000, 2.5198421,
......@@ -577,7 +577,7 @@ static const float codebook_vector2[324] = {
2.5198421, 2.5198421, 2.5198421, 2.5198421,
};
static const float codebook_vector4[162] = {
static const DECLARE_ALIGNED_16(float, codebook_vector4[162]) = {
-6.3496042, -6.3496042, -6.3496042, -4.3267487,
-6.3496042, -2.5198421, -6.3496042, -1.0000000,
-6.3496042, 0.0000000, -6.3496042, 1.0000000,
......@@ -621,7 +621,7 @@ static const float codebook_vector4[162] = {
6.3496042, 6.3496042,
};
static const float codebook_vector6[128] = {
static const DECLARE_ALIGNED_16(float, codebook_vector6[128]) = {
0.0000000, 0.0000000, 0.0000000, 1.0000000,
0.0000000, 2.5198421, 0.0000000, 4.3267487,
0.0000000, 6.3496042, 0.0000000, 8.5498797,
......@@ -656,7 +656,7 @@ static const float codebook_vector6[128] = {
13.3905183, 10.9027236, 13.3905183, 13.3905183,
};
static const float codebook_vector8[338] = {
static const DECLARE_ALIGNED_16(float, codebook_vector8[338]) = {
0.0000000, 0.0000000, 0.0000000, 1.0000000,
0.0000000, 2.5198421, 0.0000000, 4.3267487,
0.0000000, 6.3496042, 0.0000000, 8.5498797,
......@@ -744,7 +744,7 @@ static const float codebook_vector8[338] = {
27.4731418, 27.4731418,
};
static const float codebook_vector10[578] = {
static const DECLARE_ALIGNED_16(float, codebook_vector10[578]) = {
0.0000000, 0.0000000, 0.0000000, 1.0000000,
0.0000000, 2.5198421, 0.0000000, 4.3267487,
0.0000000, 6.3496042, 0.0000000, 8.5498797,
......
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