Mirror/aicodix___modem
1
0
Fork 0
mirror of https://github.com/aicodix/modem.git synced 2026-04-27 14:30:34 +00:00
Code Issues Projects Releases Packages Wiki Activity

comb distance and offset are constant now

Browse source
This commit is contained in:
Ahmet Inan 2025-06-28 11:30:53 +02:00
commit 0089c8cb30
2 changed files with 10 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

4
decode.cc
View file

@ -272,6 +272,8 @@ struct Decoder
int cons_rows = 0;
int comb_cols = 32;
int code_cols = 0;
int comb_dist = 9;
int comb_off = 4;
switch (oper_mode) {
case 23:
mod_bits = 2;
@ -342,8 +344,6 @@ struct Decoder
}
int data_bytes = data_bits / 8;
int cons_cols = code_cols + comb_cols;
int comb_dist = comb_cols ? cons_cols / comb_cols : 1;
int comb_off = comb_cols ? comb_dist / 2 : 1;
int code_off = - cons_cols / 2;
for (int i = 0; i < symbol_pos+symbol_len+extended_len; ++i)

20
encode.cc
View file

@ -266,8 +266,8 @@ struct Encoder
const uint32_t *frozen_bits = nullptr;
int code_cols = 0;
int comb_cols = 32;
int comb_dist = 1;
int comb_off = 1;
int comb_dist = 9;
int comb_off = 4;
int data_bits = 0;
int reserved_tones = 32;
switch (oper_mode) {
@ -352,17 +352,13 @@ struct Encoder
cons_cols = code_cols + comb_cols;
code_off = offset - cons_cols / 2;
if (oper_mode > 0) {
comb_dist = comb_cols ? cons_cols / comb_cols : 1;
comb_off = comb_cols ? comb_dist / 2 : 1;
if (reserved_tones) {
value kern_fac = 1 / value(10 * reserved_tones);
for (int i = 0, j = code_off - reserved_tones / 2; i < reserved_tones; ++i, ++j) {
if (j == code_off)
j += cons_cols;
fdom[bin(j)] = kern_fac;
}
bwd(kern, fdom);
value kern_fac = 1 / value(10 * reserved_tones);
for (int i = 0, j = code_off - reserved_tones / 2; i < reserved_tones; ++i, ++j) {
if (j == code_off)
j += cons_cols;
fdom[bin(j)] = kern_fac;
}
bwd(kern, fdom);
}
for (int i = 0; i < guard_len / 4; ++i)
weight[i] = 0;