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made offsets accessible to other methods

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This commit is contained in:
Ahmet Inan 2025-07-02 07:05:20 +02:00
commit 69ebf0ea29
2 changed files with 27 additions and 23 deletions
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22
encode.cc
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@ -40,8 +40,8 @@ struct Encoder
static const int tone_count = data_tones + pilot_tones + reserved_tones;
static const int block_length = 10;
static const int block_skew = 3;
static const int pilot_offset = 4;
static const int reserved_offset = 9;
static const int first_pilot = 4;
static const int first_reserved = 9;
DSP::WritePCM<value> *pcm;
DSP::FastFourierTransform<symbol_len, cmplx, -1> fwd;
DSP::FastFourierTransform<symbol_len, cmplx, 1> bwd;
@ -65,6 +65,8 @@ struct Encoder
int data_bytes;
int code_order;
int tone_off;
int pilot_off;
int reserved_off;
int symbol_count;
static int bin(int carrier)
@ -344,13 +346,13 @@ struct Encoder
int offset = (freq_off * symbol_len) / rate;
tone_off = offset - tone_count / 2;
}
void tone_reservation_kernel(int roff)
void tone_reservation_kernel()
{
value mag = 1 / value(10 * reserved_tones);
for (int i = 0; i < symbol_len; ++i)
temp[i] = 0;
for (int i = 0; i < reserved_tones; ++i)
temp[bin(i*block_length+tone_off+roff)] = mag;
temp[bin(i*block_length+tone_off+reserved_off)] = mag;
bwd(kern, temp);
}
void guard_interval_weights()
@ -376,7 +378,7 @@ struct Encoder
schmidl_cox();
CODE::MLS seq1(mls1_poly);
for (int i = 0, m = 0; i < tone_count; ++i) {
if (i % block_length == pilot_offset) {
if (i % block_length == first_pilot) {
tone[i] = nrz(seq1()) * mode[m++];
} else {
tone[i] = 0;
@ -410,12 +412,12 @@ struct Encoder
shuffle(perm, code);
CODE::MLS seq1(mls1_poly);
for (int j = 0, k = 0; j < symbol_count; ++j) {
int poff = (block_skew * j + pilot_offset) % block_length;
int roff = (block_skew * j + reserved_offset) % block_length;
pilot_off = (block_skew * j + first_pilot) % block_length;
reserved_off = (block_skew * j + first_reserved) % block_length;
for (int i = 0, m = 0; i < tone_count; ++i) {
if (i % block_length == poff) {
if (i % block_length == pilot_off) {
tone[i] = nrz(seq1()) * mode[m++];
} else if (i % block_length == roff) {
} else if (i % block_length == reserved_off) {
tone[i] = 0;
} else {
int bits = mod_bits;
@ -425,7 +427,7 @@ struct Encoder
k += bits;
}
}
tone_reservation_kernel(roff);
tone_reservation_kernel();
symbol();
}
}