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AAC: Compress codebook tables and optimise sign bit handling

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The codebooks each consist of small number of values repeated in
groups of 2 or 4.  Storing the codebooks as a packed list of 2- or
4-bit indexes into a table reduces their size substantially (from 7.5k
to 1.5k), resulting in less cache pressure.

For the band types with sign bits in the bitstream, storing the number
and position of non-zero codebook values using a few bits avoids
multiple get_bits() calls and floating-point comparisons which gcc
handles miserably.

Some float/int type punning also avoids gcc brain damage.

Overall speedup 20-35% on Cortex-A8, 20% on Core i7.

Originally committed as revision 21188 to svn://svn.ffmpeg.org/ffmpeg/trunk
release/0.6
Måns Rullgård 15 years ago
parent 9d50d39629
commit c816d3d042
3 changed files with 375 additions and 54 deletions
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  1. 241
      libavcodec/aac.c
  2. 186
      libavcodec/aactab.c
  3. 2
      libavcodec/aactab.h

241
libavcodec/aac.c
Unescape View File

@ -101,7 +101,7 @@ union float754 {
static VLC vlc_scalefactors;
static VLC vlc_spectral[11];
static float cbrt_tab[1<<13];
static uint32_t cbrt_tab[1<<13];
static ChannelElement *get_che(AACContext *ac, int type, int elem_id)
{
@ -556,9 +556,13 @@ static av_cold int aac_decode_init(AVCodecContext *avccontext)
ff_init_ff_sine_windows(10);
ff_init_ff_sine_windows( 7);
if (!cbrt_tab[(1<<13) - 1])
for (i = 0; i < 1<<13; i++)
cbrt_tab[i] = cbrtf(i) * i;
if (!cbrt_tab[(1<<13) - 1]) {
for (i = 0; i < 1<<13; i++) {
union float754 f;
f.f = cbrtf(i) * i;
cbrt_tab[i] = f.i;
}
}
return 0;
}
@ -858,6 +862,66 @@ static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
}
}
static inline float *VMUL2(float *dst, const float *v, unsigned idx,
const float *scale)
{
float s = *scale;
*dst++ = v[idx & 15] * s;
*dst++ = v[idx>>4 & 15] * s;
return dst;
}
static inline float *VMUL4(float *dst, const float *v, unsigned idx,
const float *scale)
{
float s = *scale;
*dst++ = v[idx & 3] * s;
*dst++ = v[idx>>2 & 3] * s;
*dst++ = v[idx>>4 & 3] * s;
*dst++ = v[idx>>6 & 3] * s;
return dst;
}
static inline float *VMUL2S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
union float754 s0, s1;
s0.f = s1.f = *scale;
s0.i ^= sign >> 1 << 31;
s1.i ^= sign << 31;
*dst++ = v[idx & 15] * s0.f;
*dst++ = v[idx>>4 & 15] * s1.f;
return dst;
}
static inline float *VMUL4S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
unsigned nz = idx >> 12;
union float754 s = { .f = *scale };
union float754 t;
t.i = s.i ^ (sign & 1<<31);
*dst++ = v[idx & 3] * t.f;
sign <<= nz & 1; nz >>= 1;
t.i = s.i ^ (sign & 1<<31);
*dst++ = v[idx>>2 & 3] * t.f;
sign <<= nz & 1; nz >>= 1;
t.i = s.i ^ (sign & 1<<31);
*dst++ = v[idx>>4 & 3] * t.f;
sign <<= nz & 1; nz >>= 1;
t.i = s.i ^ (sign & 1<<31);
*dst++ = v[idx>>6 & 3] * t.f;
return dst;
}
/**
* Decode spectral data; reference: table 4.50.
* Dequantize and scale spectral data; reference: 4.6.3.3.
@ -880,7 +944,7 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
const int c = 1024 / ics->num_windows;
const uint16_t *offsets = ics->swb_offset;
float *coef_base = coef;
static const float sign_lookup[] = { 1.0f, -1.0f };
int err_idx;
for (g = 0; g < ics->num_windows; g++)
memset(coef + g * 128 + offsets[ics->max_sfb], 0, sizeof(float) * (c - offsets[ics->max_sfb]));
@ -888,8 +952,6 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
for (g = 0; g < ics->num_window_groups; g++) {
for (i = 0; i < ics->max_sfb; i++, idx++) {
const int cur_band_type = band_type[idx];
const int dim = cur_band_type >= FIRST_PAIR_BT ? 2 : 4;
const int is_cb_unsigned = IS_CODEBOOK_UNSIGNED(cur_band_type);
int group;
if (cur_band_type == ZERO_BT || cur_band_type == INTENSITY_BT2 || cur_band_type == INTENSITY_BT) {
for (group = 0; group < ics->group_len[g]; group++) {
@ -912,63 +974,128 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
ac->dsp.vector_fmul_scalar(cf, cf, scale, len);
}
} else {
const float *vq = ff_aac_codebook_vector_vals[cur_band_type-1];
const uint16_t *cb_vector_idx = ff_aac_codebook_vector_idx[cur_band_type-1];
VLC_TYPE (*vlc_tab)[2] = vlc_spectral[cur_band_type - 1].table;
const int cb_size = ff_aac_spectral_sizes[cur_band_type-1];
for (group = 0; group < ics->group_len[g]; group++) {
const float *vq[96];
const float **vqp = vq;
float *cf = coef + (group << 7) + offsets[i];
uint32_t *icf = (uint32_t *) cf;
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;
const float *vq_ptr;
int j;
if (index >= ff_aac_spectral_sizes[cur_band_type - 1]) {
av_log(ac->avccontext, AV_LOG_ERROR,
"Read beyond end of ff_aac_codebook_vectors[%d][]. index %d >= %d\n",
cur_band_type - 1, index, ff_aac_spectral_sizes[cur_band_type - 1]);
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)];
if (vq_ptr[1])
coef[coef_tmp_idx + 1] = sign_lookup[get_bits1(gb)];
if (dim == 4) {
if (vq_ptr[2])
coef[coef_tmp_idx + 2] = sign_lookup[get_bits1(gb)];
if (vq_ptr[3])
coef[coef_tmp_idx + 3] = sign_lookup[get_bits1(gb)];
switch ((cur_band_type-1) >> 1) {
case 0:
do {
const int index = get_vlc2(gb, vlc_tab, 6, 3);
unsigned cb_idx;
if (index >= cb_size) {
err_idx = index;
goto err_cb_overflow;
}
cb_idx = cb_vector_idx[index];
cf = VMUL4(cf, vq, cb_idx, sf + idx);
} while (len -= 4);
break;
case 1:
do {
const int index = get_vlc2(gb, vlc_tab, 6, 3);
unsigned nnz;
unsigned cb_idx;
uint32_t bits;
if (index >= cb_size) {
err_idx = index;
goto err_cb_overflow;
}
cb_idx = cb_vector_idx[index];
nnz = cb_idx >> 8 & 15;
bits = get_bits(gb, nnz) << (32-nnz);
cf = VMUL4S(cf, vq, cb_idx, bits, sf + idx);
} while (len -= 4);
break;
case 2:
do {
const int index = get_vlc2(gb, vlc_tab, 6, 3);
unsigned cb_idx;
if (index >= cb_size) {
err_idx = index;
goto err_cb_overflow;
}
if (cur_band_type == ESC_BT) {
for (j = 0; j < 2; j++) {
if (vq_ptr[j] == 64.0f) {
int n = 4;
/* The total length of escape_sequence must be < 22 bits according
to the specification (i.e. max is 111111110xxxxxxxxxxxx). */
while (get_bits1(gb) && n < 13) n++;
if (n == 13) {
av_log(ac->avccontext, AV_LOG_ERROR, "error in spectral data, ESC overflow\n");
return -1;
}
n = (1 << n) + get_bits(gb, n);
coef[coef_tmp_idx + j] *= cbrt_tab[n];
} else
coef[coef_tmp_idx + j] *= vq_ptr[j];
cb_idx = cb_vector_idx[index];
cf = VMUL2(cf, vq, cb_idx, sf + idx);
} while (len -= 2);
break;
case 3:
case 4:
do {
const int index = get_vlc2(gb, vlc_tab, 6, 3);
unsigned nnz;
unsigned cb_idx;
unsigned sign;
if (index >= cb_size) {
err_idx = index;
goto err_cb_overflow;
}
cb_idx = cb_vector_idx[index];
nnz = cb_idx >> 8 & 15;
sign = get_bits(gb, nnz) << (cb_idx >> 12);
cf = VMUL2S(cf, vq, cb_idx, sign, sf + idx);
} while (len -= 2);
break;
default:
for (k = 0; k < len; k += 2, icf += 2) {
const int index = get_vlc2(gb, vlc_tab, 6, 3);
unsigned nzt, nnz;
unsigned cb_idx;
uint32_t bits;
int j;
if (!index) {
icf[0] = icf[1] = 0;
continue;
}
if (index >= cb_size) {
err_idx = index;
goto err_cb_overflow;
}
cb_idx = cb_vector_idx[index];
nnz = cb_idx >> 12;
nzt = cb_idx >> 8;
bits = get_bits(gb, nnz) << (32-nnz);
for (j = 0; j < 2; j++) {
if (nzt & 1<<j) {
int n = 4;
/* The total length of escape_sequence must be < 22 bits according
to the specification (i.e. max is 111111110xxxxxxxxxxxx). */
while (get_bits1(gb) && n < 13) n++;
if (n == 13) {
av_log(ac->avccontext, AV_LOG_ERROR, "error in spectral data, ESC overflow\n");
return -1;
}
n = (1 << n) + get_bits(gb, n);
icf[j] = cbrt_tab[n] | (bits & 1<<31);
bits <<= 1;
} else {
unsigned v = ((const uint32_t*)vq)[cb_idx & 15];
icf[j] = (bits & 1<<31) | v;
bits <<= !!v;
}
cb_idx >>= 4;
}
}
}
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 (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);
}
}
}
@ -993,6 +1120,12 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024],
}
}
return 0;
err_cb_overflow:
av_log(ac->avccontext, AV_LOG_ERROR,
"Read beyond end of ff_aac_codebook_vectors[%d][]. index %d >= %d\n",
band_type[idx], err_idx, ff_aac_spectral_sizes[band_type[idx]]);
return -1;
}
static av_always_inline float flt16_round(float pf)

186
libavcodec/aactab.c
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@ -899,6 +899,192 @@ const float * const ff_aac_codebook_vectors[] = {
codebook_vector8, codebook_vector10,
};
static const float codebook_vector0_vals[] = {
-1.0000000, 0.0000000, 1.0000000
};
static const float codebook_vector2_vals[] = {
0.0000000, 1.0000000, 2.5198421,
};
/*
* bits 0:1, 2:3, 4:5, 6:7 index into _vals array
* 8:11 number of non-zero values
* 12:15 bit mask of non-zero values
*/
static const uint16_t codebook_vector02_idx[] = {
0x0000, 0x8140, 0x8180, 0x4110, 0xc250, 0xc290, 0x4120, 0xc260, 0xc2a0,
0x2104, 0xa244, 0xa284, 0x6214, 0xe354, 0xe394, 0x6224, 0xe364, 0xe3a4,
0x2108, 0xa248, 0xa288, 0x6218, 0xe358, 0xe398, 0x6228, 0xe368, 0xe3a8,
0x1101, 0x9241, 0x9281, 0x5211, 0xd351, 0xd391, 0x5221, 0xd361, 0xd3a1,
0x3205, 0xb345, 0xb385, 0x7315, 0xf455, 0xf495, 0x7325, 0xf465, 0xf4a5,
0x3209, 0xb349, 0xb389, 0x7319, 0xf459, 0xf499, 0x7329, 0xf469, 0xf4a9,
0x1102, 0x9242, 0x9282, 0x5212, 0xd352, 0xd392, 0x5222, 0xd362, 0xd3a2,
0x3206, 0xb346, 0xb386, 0x7316, 0xf456, 0xf496, 0x7326, 0xf466, 0xf4a6,
0x320a, 0xb34a, 0xb38a, 0x731a, 0xf45a, 0xf49a, 0x732a, 0xf46a, 0xf4aa,
};
static const float codebook_vector4_vals[] = {
-6.3496042, -4.3267487,
-2.5198421, -1.0000000,
0.0000000, 1.0000000,
2.5198421, 4.3267487,
6.3496042,
};
/*
* bits 0:3, 4:7 index into _vals array
*/
static const uint16_t codebook_vector4_idx[] = {
0x0000, 0x0010, 0x0020, 0x0030, 0x0040, 0x0050, 0x0060, 0x0070, 0x0080,
0x0001, 0x0011, 0x0021, 0x0031, 0x0041, 0x0051, 0x0061, 0x0071, 0x0081,
0x0002, 0x0012, 0x0022, 0x0032, 0x0042, 0x0052, 0x0062, 0x0072, 0x0082,
0x0003, 0x0013, 0x0023, 0x0033, 0x0043, 0x0053, 0x0063, 0x0073, 0x0083,
0x0004, 0x0014, 0x0024, 0x0034, 0x0044, 0x0054, 0x0064, 0x0074, 0x0084,
0x0005, 0x0015, 0x0025, 0x0035, 0x0045, 0x0055, 0x0065, 0x0075, 0x0085,
0x0006, 0x0016, 0x0026, 0x0036, 0x0046, 0x0056, 0x0066, 0x0076, 0x0086,
0x0007, 0x0017, 0x0027, 0x0037, 0x0047, 0x0057, 0x0067, 0x0077, 0x0087,
0x0008, 0x0018, 0x0028, 0x0038, 0x0048, 0x0058, 0x0068, 0x0078, 0x0088,
};
static const float codebook_vector6_vals[] = {
0.0000000, 1.0000000, 2.5198421, 4.3267487,
6.3496042, 8.5498797, 10.9027236, 13.3905183,
};
/*
* bits 0:3, 4:7 index into _vals array
* 8:11 number of non-zero values
* 12:15 1: only second value non-zero
* 0: other cases
*/
static const uint16_t codebook_vector6_idx[] = {
0x0000, 0x0110, 0x0120, 0x0130, 0x0140, 0x0150, 0x0160, 0x0170,
0x1101, 0x0211, 0x0221, 0x0231, 0x0241, 0x0251, 0x0261, 0x0271,
0x1102, 0x0212, 0x0222, 0x0232, 0x0242, 0x0252, 0x0262, 0x0272,
0x1103, 0x0213, 0x0223, 0x0233, 0x0243, 0x0253, 0x0263, 0x0273,
0x1104, 0x0214, 0x0224, 0x0234, 0x0244, 0x0254, 0x0264, 0x0274,
0x1105, 0x0215, 0x0225, 0x0235, 0x0245, 0x0255, 0x0265, 0x0275,
0x1106, 0x0216, 0x0226, 0x0236, 0x0246, 0x0256, 0x0266, 0x0276,
0x1107, 0x0217, 0x0227, 0x0237, 0x0247, 0x0257, 0x0267, 0x0277,
};
static const float codebook_vector8_vals[] = {
0.0000000, 1.0000000,
2.5198421, 4.3267487,
6.3496042, 8.5498797,
10.9027236, 13.3905183,
16.0000000, 18.7207544,
21.5443469, 24.4637810,
27.4731418,
};
/*
* bits 0:3, 4:7 index into _vals array
* 8:11 number of non-zero values
* 12:15 1: only second value non-zero
* 0: other cases
*/
static const uint16_t codebook_vector8_idx[] = {
0x0000, 0x0110, 0x0120, 0x0130, 0x0140, 0x0150, 0x0160,
0x0170, 0x0180, 0x0190, 0x01a0, 0x01b0, 0x01c0,
0x1101, 0x0211, 0x0221, 0x0231, 0x0241, 0x0251, 0x0261,
0x0271, 0x0281, 0x0291, 0x02a1, 0x02b1, 0x02c1,
0x1102, 0x0212, 0x0222, 0x0232, 0x0242, 0x0252, 0x0262,
0x0272, 0x0282, 0x0292, 0x02a2, 0x02b2, 0x02c2,
0x1103, 0x0213, 0x0223, 0x0233, 0x0243, 0x0253, 0x0263,
0x0273, 0x0283, 0x0293, 0x02a3, 0x02b3, 0x02c3,
0x1104, 0x0214, 0x0224, 0x0234, 0x0244, 0x0254, 0x0264,
0x0274, 0x0284, 0x0294, 0x02a4, 0x02b4, 0x02c4,
0x1105, 0x0215, 0x0225, 0x0235, 0x0245, 0x0255, 0x0265,
0x0275, 0x0285, 0x0295, 0x02a5, 0x02b5, 0x02c5,
0x1106, 0x0216, 0x0226, 0x0236, 0x0246, 0x0256, 0x0266,
0x0276, 0x0286, 0x0296, 0x02a6, 0x02b6, 0x02c6,
0x1107, 0x0217, 0x0227, 0x0237, 0x0247, 0x0257, 0x0267,
0x0277, 0x0287, 0x0297, 0x02a7, 0x02b7, 0x02c7,
0x1108, 0x0218, 0x0228, 0x0238, 0x0248, 0x0258, 0x0268,
0x0278, 0x0288, 0x0298, 0x02a8, 0x02b8, 0x02c8,
0x1109, 0x0219, 0x0229, 0x0239, 0x0249, 0x0259, 0x0269,
0x0279, 0x0289, 0x0299, 0x02a9, 0x02b9, 0x02c9,
0x110a, 0x021a, 0x022a, 0x023a, 0x024a, 0x025a, 0x026a,
0x027a, 0x028a, 0x029a, 0x02aa, 0x02ba, 0x02ca,
0x110b, 0x021b, 0x022b, 0x023b, 0x024b, 0x025b, 0x026b,
0x027b, 0x028b, 0x029b, 0x02ab, 0x02bb, 0x02cb,
0x110c, 0x021c, 0x022c, 0x023c, 0x024c, 0x025c, 0x026c,
0x027c, 0x028c, 0x029c, 0x02ac, 0x02bc, 0x02cc,
};
static const float codebook_vector10_vals[] = {
0.0000000, 1.0000000,
2.5198421, 4.3267487,
6.3496042, 8.5498797,
10.9027236, 13.3905183,
16.0000000, 18.7207544,
21.5443469, 24.4637810,
27.4731418, 30.5673509,
33.7419917, 36.9931811,
};
/*
* bits 0:3, 4:7 index into _vals array
* 8:9 bit mask of escape-coded entries
* 12:15 number of non-zero values
*/
static const uint16_t codebook_vector10_idx[] = {
0x0000, 0x1010, 0x1020, 0x1030, 0x1040, 0x1050, 0x1060, 0x1070,
0x1080, 0x1090, 0x10a0, 0x10b0, 0x10c0, 0x10d0, 0x10e0, 0x10f0, 0x1200,
0x1001, 0x2011, 0x2021, 0x2031, 0x2041, 0x2051, 0x2061, 0x2071,
0x2081, 0x2091, 0x20a1, 0x20b1, 0x20c1, 0x20d1, 0x20e1, 0x20f1, 0x2201,
0x1002, 0x2012, 0x2022, 0x2032, 0x2042, 0x2052, 0x2062, 0x2072,
0x2082, 0x2092, 0x20a2, 0x20b2, 0x20c2, 0x20d2, 0x20e2, 0x20f2, 0x2202,
0x1003, 0x2013, 0x2023, 0x2033, 0x2043, 0x2053, 0x2063, 0x2073,
0x2083, 0x2093, 0x20a3, 0x20b3, 0x20c3, 0x20d3, 0x20e3, 0x20f3, 0x2203,
0x1004, 0x2014, 0x2024, 0x2034, 0x2044, 0x2054, 0x2064, 0x2074,
0x2084, 0x2094, 0x20a4, 0x20b4, 0x20c4, 0x20d4, 0x20e4, 0x20f4, 0x2204,
0x1005, 0x2015, 0x2025, 0x2035, 0x2045, 0x2055, 0x2065, 0x2075,
0x2085, 0x2095, 0x20a5, 0x20b5, 0x20c5, 0x20d5, 0x20e5, 0x20f5, 0x2205,
0x1006, 0x2016, 0x2026, 0x2036, 0x2046, 0x2056, 0x2066, 0x2076,
0x2086, 0x2096, 0x20a6, 0x20b6, 0x20c6, 0x20d6, 0x20e6, 0x20f6, 0x2206,
0x1007, 0x2017, 0x2027, 0x2037, 0x2047, 0x2057, 0x2067, 0x2077,
0x2087, 0x2097, 0x20a7, 0x20b7, 0x20c7, 0x20d7, 0x20e7, 0x20f7, 0x2207,
0x1008, 0x2018, 0x2028, 0x2038, 0x2048, 0x2058, 0x2068, 0x2078,
0x2088, 0x2098, 0x20a8, 0x20b8, 0x20c8, 0x20d8, 0x20e8, 0x20f8, 0x2208,
0x1009, 0x2019, 0x2029, 0x2039, 0x2049, 0x2059, 0x2069, 0x2079,
0x2089, 0x2099, 0x20a9, 0x20b9, 0x20c9, 0x20d9, 0x20e9, 0x20f9, 0x2209,
0x100a, 0x201a, 0x202a, 0x203a, 0x204a, 0x205a, 0x206a, 0x207a,
0x208a, 0x209a, 0x20aa, 0x20ba, 0x20ca, 0x20da, 0x20ea, 0x20fa, 0x220a,
0x100b, 0x201b, 0x202b, 0x203b, 0x204b, 0x205b, 0x206b, 0x207b,
0x208b, 0x209b, 0x20ab, 0x20bb, 0x20cb, 0x20db, 0x20eb, 0x20fb, 0x220b,
0x100c, 0x201c, 0x202c, 0x203c, 0x204c, 0x205c, 0x206c, 0x207c,
0x208c, 0x209c, 0x20ac, 0x20bc, 0x20cc, 0x20dc, 0x20ec, 0x20fc, 0x220c,
0x100d, 0x201d, 0x202d, 0x203d, 0x204d, 0x205d, 0x206d, 0x207d,
0x208d, 0x209d, 0x20ad, 0x20bd, 0x20cd, 0x20dd, 0x20ed, 0x20fd, 0x220d,
0x100e, 0x201e, 0x202e, 0x203e, 0x204e, 0x205e, 0x206e, 0x207e,
0x208e, 0x209e, 0x20ae, 0x20be, 0x20ce, 0x20de, 0x20ee, 0x20fe, 0x220e,
0x100f, 0x201f, 0x202f, 0x203f, 0x204f, 0x205f, 0x206f, 0x207f,
0x208f, 0x209f, 0x20af, 0x20bf, 0x20cf, 0x20df, 0x20ef, 0x20ff, 0x220f,
0x1100, 0x2110, 0x2120, 0x2130, 0x2140, 0x2150, 0x2160, 0x2170,
0x2180, 0x2190, 0x21a0, 0x21b0, 0x21c0, 0x21d0, 0x21e0, 0x21f0, 0x2300,
};
const float *const ff_aac_codebook_vector_vals[] = {
codebook_vector0_vals, codebook_vector0_vals,
codebook_vector2_vals, codebook_vector2_vals,
codebook_vector4_vals, codebook_vector4_vals,
codebook_vector6_vals, codebook_vector6_vals,
codebook_vector8_vals, codebook_vector8_vals,
codebook_vector10_vals,
};
const uint16_t *const ff_aac_codebook_vector_idx[] = {
codebook_vector02_idx, codebook_vector02_idx,
codebook_vector02_idx, codebook_vector02_idx,
codebook_vector4_idx, codebook_vector4_idx,
codebook_vector6_idx, codebook_vector6_idx,
codebook_vector8_idx, codebook_vector8_idx,
codebook_vector10_idx,
};
/* @name swb_offsets
* Sample offset into the window indicating the beginning of a scalefactor
* window band

2
libavcodec/aactab.h
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@ -64,6 +64,8 @@ extern const uint8_t * const ff_aac_spectral_bits [11];
extern const uint16_t ff_aac_spectral_sizes[11];
extern const float *ff_aac_codebook_vectors[];
extern const float *ff_aac_codebook_vector_vals[];
extern const uint16_t *ff_aac_codebook_vector_idx[];
extern const uint16_t * const ff_swb_offset_1024[13];
extern const uint16_t * const ff_swb_offset_128 [13];

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