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use a shorter guard interval

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got rid of 8k and 16k sample rates. we can resample if needed.
This commit is contained in:
Ahmet Inan 2025-07-16 12:00:49 +02:00
commit 1dbc86c66f
2 changed files with 8 additions and 20 deletions
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12
decode.cc
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@ -37,9 +37,9 @@ struct Decoder : Common
typedef int16_t code_type;
typedef SIMD<code_type, 32> mesg_type;
typedef DSP::Const<value> Const;
static const int guard_len = rate / 100;
static const int symbol_len = guard_len * 16;
static const int filter_len = (((21 * rate) / 8000) & ~3) | 1;
static const int guard_len = rate / 300;
static const int symbol_len = guard_len * 40;
static const int filter_len = 129;
static const int extended_len = symbol_len + guard_len;
static const int buffer_len = 5 * extended_len;
static const int search_pos = extended_len;
@ -423,12 +423,6 @@ int main(int argc, char **argv)
std::cerr << std::fixed << std::setprecision(1);
int output_count = argc - 2;
switch (input_file.rate()) {
case 8000:
delete new Decoder<value, cmplx, 8000>(&input_file, argv+2, output_count);
break;
case 16000:
delete new Decoder<value, cmplx, 16000>(&input_file, argv+2, output_count);
break;
case 44100:
delete new Decoder<value, cmplx, 44100>(&input_file, argv+2, output_count);
break;