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This commit is contained in:
Ahmet Inan 2025-07-12 14:42:00 +02:00
commit b72a2b3f31
2 changed files with 13 additions and 6 deletions
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8
decode.cc
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@ -323,12 +323,16 @@ struct Decoder : Common
for (int i = seed_off; i < tone_count; i += block_length)
chan[i] = DSP::lerp(chan[i], tone[i], value(0.5));
}
int poly_index = j ? meta_data : 0;
int poly_index = j ? meta_data >> 2 : 0;
if (poly_index < 0 || poly_index > 15) {
std::cerr << "poly index damaged" << std::endl;
meta_data = 0;
}
CODE::MLS seq(slm_poly[poly_index], seed_data+1);
int seed_value = j ? ((meta_data & 3) << 6) | seed_data : seed_data;
if (seed_value == 0) {
std::cerr << "reserved seed value detected" << std::endl;
}
CODE::MLS seq(slm_poly[poly_index], seed_value);
for (int i = 0; i < tone_count; ++i)
if (i % block_length != meta_off && i % block_length != seed_off)
demod[i] *= nrz(seq());

11
encode.cc
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@ -80,17 +80,20 @@ struct Encoder : public Common
for (int i = 0; differential && symbol_number > 0 && i < tone_count; ++i)
tone[i] *= prev[i];
value best_papr = 1000;
int trials = symbol_number ? 16 * 64 : 64;
int trials = symbol_number ? 16 * 256 : 64;
for (int trial = 0; trial < trials; ++trial) {
for (int i = 0; i < tone_count; ++i)
temp[i] = tone[i];
if (symbol_number >= 0) {
int poly_index = trial >> 6;
int meta_data = symbol_number ? poly_index : oper_mode;
int seed_value = trial & 255;
if (seed_value == 0)
continue;
int poly_index = trial >> 8;
int meta_data = symbol_number ? (poly_index << 2 | ((trial >> 6) & 3)) : oper_mode;
hadamard_encoder(meta, meta_data);
int seed_data = trial & 63;
hadamard_encoder(seed, seed_data);
CODE::MLS seq(slm_poly[poly_index], seed_data + 1);
CODE::MLS seq(slm_poly[poly_index], seed_value);
for (int i = 0, m = 0, s = 0; i < tone_count; ++i)
if (i % block_length == meta_off)
temp[i] *= meta[m++];