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do unlimited clipping before the PCM writer does it

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This commit is contained in:
Ahmet Inan 2023-12-18 09:07:34 +01:00
commit 71cc33e481
1 changed files with 6 additions and 5 deletions
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11
encode.cc
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@ -70,7 +70,7 @@ struct Encoder
{
return 1 - 2 * bit;
}
void clipping_and_filtering()
void clipping_and_filtering(bool limit)
{
for (int i = 0; i < symbol_len; ++i) {
value pwr = norm(tdom[i]);
@ -84,7 +84,7 @@ struct Encoder
cmplx err = temp[i] - fdom[i];
value mag = abs(err);
value lim = 0.1;
if (mag > lim)
if (limit && mag > lim)
temp[i] -= ((mag - lim) / mag) * err;
} else {
temp[i] = 0;
@ -113,10 +113,11 @@ struct Encoder
bwd(tdom, fdom);
for (int i = 0; i < symbol_len; ++i)
tdom[i] /= std::sqrt(value(symbol_len*4));
if (papr_reduction) {
clipping_and_filtering();
clipping_and_filtering(papr_reduction);
if (papr_reduction)
tone_reservation();
}
for (int i = 0; i < symbol_len; ++i)
tdom[i] = cmplx(std::min(value(1), tdom[i].real()), std::min(value(1), tdom[i].imag()));
for (int i = 0; i < guard_len; ++i) {
value x = value(i) / value(guard_len - 1);
value ratio(0.5);