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made number of active carriers a constructor argument

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This commit is contained in:
Ahmet Inan 2021-06-16 13:57:48 +02:00
commit 463836c41f
2 changed files with 28 additions and 25 deletions
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26
encode.cc
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@ -31,9 +31,7 @@ struct Encoder
static const int ldpc_bits = 64800;
static const int bch_bits = ldpc_bits - 21600;
static const int data_bits = bch_bits - 12 * 16;
static const int code_cols = 432;
static const int cons_cnt = ldpc_bits / Mod::BITS;
static const int code_rows = cons_cnt / code_cols;
static const int mls0_len = 127;
static const int mls0_poly = 0b10001001;
static const int mls1_len = 255;
@ -55,6 +53,8 @@ struct Encoder
cmplx temp[symbol_len];
cmplx guard[guard_len];
cmplx papr_min, papr_max;
int code_cols;
int code_rows;
int code_off;
int mls0_off;
int mls1_off;
@ -180,7 +180,7 @@ struct Encoder
for (int k = 0; k < Mod::BITS; ++k)
bint[Mod::BITS*i+k] = code[cons_cnt*k+i];
}
Encoder(DSP::WritePCM<value> *pcm, uint8_t *inp, int freq_off, uint64_t call_sign) :
Encoder(DSP::WritePCM<value> *pcm, uint8_t *inp, int freq_off, uint64_t call_sign, int code_cols) :
pcm(pcm), crc0(0xA8F4), bchenc0({
0b100011101, 0b101110111, 0b111110011, 0b101101001,
0b110111101, 0b111100111, 0b100101011, 0b111010111,
@ -191,11 +191,13 @@ struct Encoder
0b10000000000101101, 0b10000000101110011, 0b10000111110111101,
0b10101101001010101, 0b10001111100101111, 0b11111011110110101,
0b11010111101100101, 0b10111001101100111, 0b10000111010100001,
0b10111010110100111, 0b10011101000101101, 0b10001101011100011})
0b10111010110100111, 0b10011101000101101, 0b10001101011100011}),
code_cols(code_cols), code_rows(cons_cnt / code_cols)
{
code_off = (freq_off * symbol_len) / rate - code_cols / 2;
mls0_off = code_off + 90;
mls1_off = code_off + 89;
int offset = (freq_off * symbol_len) / rate;
code_off = offset - code_cols / 2;
mls0_off = offset - mls0_len + 1;
mls1_off = offset - mls1_len / 2;
papr_min = cmplx(1000, 1000), papr_max = cmplx(-1000, -1000);
pilot_block();
schmidl_cox();
@ -283,7 +285,7 @@ int main(int argc, char **argv)
std::cerr << "Couldn't open file \"" << input_name << "\" for reading." << std::endl;
return 1;
}
const int code_len = 64800 / 8;
const int code_len = 64800 / 8, code_cols = 432;
const int data_len = code_len - (12 * 16 + 21600) / 8;
uint8_t *input_data = new uint8_t[code_len];
for (int i = 0; i < data_len; ++i)
@ -293,16 +295,16 @@ int main(int argc, char **argv)
output_file.silence(output_rate);
switch (output_rate) {
case 8000:
delete new Encoder<value, cmplx, 8000>(&output_file, input_data, freq_off, call_sign);
delete new Encoder<value, cmplx, 8000>(&output_file, input_data, freq_off, call_sign, code_cols);
break;
case 16000:
delete new Encoder<value, cmplx, 16000>(&output_file, input_data, freq_off, call_sign);
delete new Encoder<value, cmplx, 16000>(&output_file, input_data, freq_off, call_sign, code_cols);
break;
case 44100:
delete new Encoder<value, cmplx, 44100>(&output_file, input_data, freq_off, call_sign);
delete new Encoder<value, cmplx, 44100>(&output_file, input_data, freq_off, call_sign, code_cols);
break;
case 48000:
delete new Encoder<value, cmplx, 48000>(&output_file, input_data, freq_off, call_sign);
delete new Encoder<value, cmplx, 48000>(&output_file, input_data, freq_off, call_sign, code_cols);
break;
default:
std::cerr << "Unsupported sample rate." << std::endl;