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