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feature: Add 2.5 ms and 5 ms LC3 plus frame durations

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fix: Check TNS bitstream data

fix: LTPF Activation with 2.5 ms frame sizes
This commit is contained in:
anonymix007
2023-12-13 10:56:20 -08:00
committed by Antoine Soulier
parent a75f187e00
commit 149cb6537e
43 changed files with 3095 additions and 1628 deletions
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47
src/sns.c
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@@ -157,7 +157,7 @@ LC3_HOT static void compute_scale_factors(
/* Pre-emphasis gain table :
* Ge[b] = 10 ^ (b * g_tilt) / 630 , b = [0..63] */
static const float ge_table[LC3_NUM_SRATE][LC3_NUM_BANDS] = {
static const float ge_table[LC3_NUM_SRATE][LC3_MAX_BANDS] = {
[LC3_SRATE_8K] = { /* g_tilt = 14 */
1.00000000e+00, 1.05250029e+00, 1.10775685e+00, 1.16591440e+00,
@@ -250,17 +250,22 @@ LC3_HOT static void compute_scale_factors(
7.19685673e+02, 8.03085722e+02, 8.96150502e+02, 1.00000000e+03 },
};
float e[LC3_NUM_BANDS];
float e[LC3_MAX_BANDS];
/* --- Copy and padding --- */
int nb = LC3_MIN(lc3_band_lim[dt][sr][LC3_NUM_BANDS], LC3_NUM_BANDS);
int n2 = LC3_NUM_BANDS - nb;
int nb = lc3_num_bands[dt][sr];
int n4 = nb < 32 ? 32 % nb : 0;
int n2 = nb < 32 ? nb - n4 : LC3_MAX_BANDS - nb;
for (int i2 = 0; i2 < n2; i2++)
e[2*i2 + 0] = e[2*i2 + 1] = eb[i2];
for (int i4 = 0; i4 < n4; i4++)
e[4*i4 + 0] = e[4*i4 + 1] =
e[4*i4 + 2] = e[4*i4 + 3] = eb[i4];
memcpy(e + 2*n2, eb + n2, (nb - n2) * sizeof(float));
for (int i2 = n4; i2 < n4+n2; i2++)
e[2*(n4+i2) + 0] = e[2*(n4+i2) + 1] = eb[i2];
memcpy(e + 4*n4 + 2*n2, eb + n4 + n2, (nb - n4 - n2) * sizeof(float));
/* --- Smoothing, pre-emphasis and logarithm --- */
@@ -269,7 +274,7 @@ LC3_HOT static void compute_scale_factors(
float e0 = e[0], e1 = e[0], e2;
float e_sum = 0;
for (int i = 0; i < LC3_NUM_BANDS-1; ) {
for (int i = 0; i < LC3_MAX_BANDS-1; ) {
e[i] = (e0 * 0.25f + e1 * 0.5f + (e2 = e[i+1]) * 0.25f) * ge[i];
e_sum += e[i++];
@@ -280,12 +285,12 @@ LC3_HOT static void compute_scale_factors(
e_sum += e[i++];
}
e[LC3_NUM_BANDS-1] = (e0 * 0.25f + e1 * 0.75f) * ge[LC3_NUM_BANDS-1];
e_sum += e[LC3_NUM_BANDS-1];
e[LC3_MAX_BANDS-1] = (e0 * 0.25f + e1 * 0.75f) * ge[LC3_MAX_BANDS-1];
e_sum += e[LC3_MAX_BANDS-1];
float noise_floor = fmaxf(e_sum * (1e-4f / 64), 0x1p-32f);
for (int i = 0; i < LC3_NUM_BANDS; i++)
for (int i = 0; i < LC3_MAX_BANDS; i++)
e[i] = fast_log2f(fmaxf(e[i], noise_floor)) * 0.5f;
/* --- Grouping & scaling --- */
@@ -680,7 +685,7 @@ LC3_HOT static void spectral_shaping(enum lc3_dt dt, enum lc3_srate sr,
{
/* --- Interpolate scale factors --- */
float scf[LC3_NUM_BANDS];
float scf[LC3_MAX_BANDS];
float s0, s1 = inv ? -scf_q[0] : scf_q[0];
scf[0] = scf[1] = s1;
@@ -694,18 +699,22 @@ LC3_HOT static void spectral_shaping(enum lc3_dt dt, enum lc3_srate sr,
scf[62] = s1 + 0.125f * (s1 - s0);
scf[63] = s1 + 0.375f * (s1 - s0);
int nb = LC3_MIN(lc3_band_lim[dt][sr][LC3_NUM_BANDS], LC3_NUM_BANDS);
int n2 = LC3_NUM_BANDS - nb;
int nb = lc3_num_bands[dt][sr];
int n4 = nb < 32 ? 32 % nb : 0;
int n2 = nb < 32 ? nb - n4 : LC3_MAX_BANDS - nb;
for (int i2 = 0; i2 < n2; i2++)
scf[i2] = 0.5f * (scf[2*i2] + scf[2*i2+1]);
for (int i4 = 0; i4 < n4; i4++)
scf[i4] = 0.25f * (scf[4*i4+0] + scf[4*i4+1] +
scf[4*i4+2] + scf[4*i4+3]);
if (n2 > 0)
memmove(scf + n2, scf + 2*n2, (nb - n2) * sizeof(float));
for (int i2 = n4; i2 < n4+n2; i2++)
scf[i2] = 0.5f * (scf[2*(n4+i2)] + scf[2*(n4+i2)+1]);
memmove(scf + n4 + n2, scf + 4*n4 + 2*n2, (nb - n4 - n2) * sizeof(float));
/* --- Spectral shaping --- */
const int *lim = lc3_band_lim[dt][sr];
const uint16_t *lim = lc3_band_lim[dt][sr];
for (int i = 0, ib = 0; ib < nb; ib++) {
float g_sns = fast_exp2f(-scf[ib]);