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Added some algorithms (untested)

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ha7ilm 2017-03-25 23:47:23 +01:00
parent 2d5c27d3dc
commit fabca11450
1 changed files with 64 additions and 0 deletions
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64
libcsdr.c
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@ -1413,6 +1413,29 @@ char psk31_varicode_decoder_push(unsigned long long* status_shr, unsigned char s
return 0;
}
void psk31_varicode_encoder_u8_u8(unsigned char* input, unsigned char* output, int input_size, int output_max_size, int* input_processed, int* output_size)
{
*output_size=0;
for(*input_processed=0; *input_processed<input_size; *input_processed++)
{
for(int ci=0; ci<n_psk31_varicode_items; ci++) //ci: character index
{
psk31_varicode_item_t current_varicode = psk31_varicode_items[ci].ascii;
if(input[*input_processed]==current_varicode.ascii)
{
if(output_max_size<current_varicode.bitcount) return;
for(int bi=0; bi<current_varicode.bitcount; bi++) //bi: bit index
{
output[*output_size]=(psk31_varicode_items[ci]>>(current_varicode.bitcount-bi-1))&1;
*output_size++;
output_max_size--;
}
break;
}
}
}
}
rtty_baudot_item_t rtty_baudot_items[] =
{
{ .code = 0b00000, .ascii_letter=0, .ascii_figure=0 },
@ -1572,6 +1595,47 @@ void binary_slicer_f_u8(float* input, unsigned char* output, int input_size)
for(int i=0;i<input_size;i++) output[i] = input[i] > 0;
}
void psk_modulator_u8_c(unsigned char* input, complexf* output, int input_size, int npsk)
{
//outputs one complex sample per input symbol
for(int i=0;i<input_size;i++)
{
float out_phase=((2*M_PI)/npsk)*input[i];
iof(output,i)=cos(out_phase);
qof(output,i)=sin(out_phase);
}
}
void duplicate_samples_ntimes_u8_u8(unsigned char* input, unsigned char* output, int input_size_bytes, int sample_size_bytes, int ntimes)
{
int l=0;
for(int i=0;i<input_size_bytes;i+=sample_size_bytes)
for(int k=0;k<ntimes;k++)
for(int j=0;j<sample_size_bytes;j++)
output[l++]=input[i+j];
}
complexf psk31_interpolate_sine_cc(complexf* input, complexf* output, int input_size, int interpolation, complexf last_input)
{
for(int i=0;i<input_size;i++)
for(int j=0; j<interpolation; j++)
{
float rate = (1+sin(-(M_PI/2)+M_PI*((j+1)/(float)interpolation)))/2;
iof(output,i)=iof(input,i) * rate + last_input * (1-rate);
qof(output,i)=qof(input,i) * rate + last_input * (1-rate);
last_input = output[i];
}
return last_input;
}
void pack_bits_8to1_u8_u8(unsigned char* input, unsigned char* output, int input_size)
{ //output size should be input_size × 8
for(int i=0; i<input_size; i++)
for(int bi=0; bi<8; bi++) //bi: bit index
*(output++)=(input[i]>>bi)&1;
}
/*
_____ _ _______ _ _ _____
/ ____| (_) ___ |__ __(_) (_) | __ \