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wip: MDCT, SNS in fixed point

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This commit is contained in:
Antoine Soulier
2023-04-14 14:47:31 -07:00
parent 2ce884d8ef
commit 82db8e05ae
16 changed files with 2526 additions and 2187 deletions
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49
src/lc3.c
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@@ -271,7 +271,21 @@ static void analyze(struct lc3_encoder *encoder,
float e[LC3_NUM_BANDS];
#ifdef CONFIG_FIXED_POINT
{
int nd = LC3_ND(dt, sr);
int32_t __xs[ns], __xf[ns], __xd[nd];
for (int i = 0; i < ns; i++) __xs[i] = ldexpf(xs[i], 8);
for (int i = 0; i < nd; i++) __xd[i] = ldexpf(xd[i], 8);
lc3_mdct_forward(dt, sr_pcm, sr, __xs, __xd, __xf);
for (int i = 0; i < nd; i++) xd[i] = ldexpf(__xd[i], -8);
for (int i = 0; i < ns; i++) xf[i] = ldexpf(__xf[i], -8);
}
#else
lc3_mdct_forward(dt, sr_pcm, sr, xs, xd, xf);
#endif
bool nn_flag = lc3_energy_compute(dt, sr, xf, e);
if (nn_flag)
@@ -583,16 +597,49 @@ static void synthesize(struct lc3_decoder *decoder,
lc3_tns_synthesize(dt, bw, &side->tns, xf);
#ifdef CONFIG_FIXED_POINT
{
int nd = LC3_ND(dt, sr);
int32_t __xf[ns], __xg[ns], __xs[ns], __xd[nd];
for (int i = 0; i < ns; i++) __xf[i] = ldexpf(xf[i], 8);
for (int i = 0; i < ns; i++) __xg[i] = ldexpf(xg[i], 8);
for (int i = 0; i < nd; i++) __xd[i] = ldexpf(xd[i], 8);
lc3_sns_synthesize(dt, sr, &side->sns, __xf, __xg);
lc3_mdct_inverse(dt, sr_pcm, sr, __xg, __xd, __xs);
for (int i = 0; i < nd; i++) xd[i] = ldexpf(__xd[i], -8);
for (int i = 0; i < ns; i++) xs[i] = ldexpf(__xs[i], -8);
for (int i = 0; i < ns; i++) xg[i] = ldexpf(__xg[i], -8);
}
#else
lc3_sns_synthesize(dt, sr, &side->sns, xf, xg);
lc3_mdct_inverse(dt, sr_pcm, sr, xg, xd, xs);
#endif
} else {
lc3_plc_synthesize(dt, sr, &decoder->plc, xg, xf);
memset(xf + ne, 0, (ns - ne) * sizeof(float));
memset(xf + ne, 0, (ns - ne) * sizeof(lc3_intfloat_t));
#ifdef CONFIG_FIXED_POINT
{
int nd = LC3_ND(dt, sr);
lc3_intfloat_t __xf[ns], __xs[ns], __xd[nd];
for (int i = 0; i < ns; i++) __xf[i] = ldexpf(xf[i], 8);
for (int i = 0; i < nd; i++) __xd[i] = ldexpf(xd[i], 8);
lc3_mdct_inverse(dt, sr_pcm, sr, __xf, __xd, __xs);
for (int i = 0; i < nd; i++) xd[i] = ldexpf(__xd[i], -8);
for (int i = 0; i < ns; i++) xs[i] = ldexpf(__xs[i], -8);
}
#else
lc3_mdct_inverse(dt, sr_pcm, sr, xf, xd, xs);
#endif
}
lc3_ltpf_synthesize(dt, sr_pcm, nbytes, &decoder->ltpf,