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added prepare()

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This commit is contained in:
Ahmet Inan 2021-10-08 11:30:20 +02:00
commit 0fac5fc62b
2 changed files with 108 additions and 119 deletions
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40
encode.cc
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@ -184,29 +184,15 @@ struct Encoder
}
cmplx mod_map(code_type *b)
{
switch (oper_mode) {
case 6:
case 7:
case 10:
case 11:
return PhaseShiftKeying<8, cmplx, code_type>::map(b);
case 8:
case 9:
case 12:
case 13:
switch (mod_bits) {
case 2:
return PhaseShiftKeying<4, cmplx, code_type>::map(b);
case 3:
return PhaseShiftKeying<8, cmplx, code_type>::map(b);
}
return 0;
}
Encoder(DSP::WritePCM<value> *pcm, const uint8_t *inp, int freq_off, uint64_t call_sign, int oper_mode) :
pcm(pcm), crc0(0xA8F4), crc1(0xD419CC15), bchenc({
0b100011101, 0b101110111, 0b111110011, 0b101101001,
0b110111101, 0b111100111, 0b100101011, 0b111010111,
0b000010011, 0b101100101, 0b110001011, 0b101100011,
0b100011011, 0b100111111, 0b110001101, 0b100101101,
0b101011111, 0b111111001, 0b111000011, 0b100111001,
0b110101001, 0b000011111, 0b110000111, 0b110110001}),
oper_mode(oper_mode)
bool prepare()
{
switch (oper_mode) {
case 6:
@ -274,10 +260,24 @@ struct Encoder
frozen_bits = frozen_64512_43072;
break;
default:
return;
return false;
}
cons_cnt = cons_bits / mod_bits;
cons_rows = cons_cnt / cons_cols;
return true;
}
Encoder(DSP::WritePCM<value> *pcm, const uint8_t *inp, int freq_off, uint64_t call_sign, int oper_mode) :
pcm(pcm), crc0(0xA8F4), crc1(0xD419CC15), bchenc({
0b100011101, 0b101110111, 0b111110011, 0b101101001,
0b110111101, 0b111100111, 0b100101011, 0b111010111,
0b000010011, 0b101100101, 0b110001011, 0b101100011,
0b100011011, 0b100111111, 0b110001101, 0b100101101,
0b101011111, 0b111111001, 0b111000011, 0b100111001,
0b110101001, 0b000011111, 0b110000111, 0b110110001}),
oper_mode(oper_mode)
{
if (!prepare())
return;
int offset = (freq_off * symbol_len) / rate;
code_off = offset - cons_cols / 2;
mls0_off = offset - mls0_len + 1;