add ryfi decoder module

decoder_modules/ryfi_decoder/src/ryfi/conv_codec.cpp

@@ -0,0 +1,74 @@
+#include "conv_codec.h"
+
+namespace ryfi {
+    ConvEncoder::ConvEncoder(dsp::stream<uint8_t>* in) {
+        // Create the convolutional encoder instance
+        conv = correct_convolutional_create(2, 7, correct_conv_r12_7_polynomial);
+        
+        // Init the base class
+        base_type::init(in);
+    }
+
+    ConvEncoder::~ConvEncoder() {
+        // Destroy the convolutional encoder instance
+        correct_convolutional_destroy(conv);
+    }
+
+    int ConvEncoder::encode(const uint8_t* in, uint8_t* out, int count) {
+        // Run convolutional encoder on the data
+        return correct_convolutional_encode(conv, in, count, out);
+    }
+
+    int ConvEncoder::run() {
+        int count = base_type::_in->read();
+        if (count < 0) { return -1; }
+
+        count = encode(base_type::_in->readBuf, base_type::out.writeBuf, count);
+
+        base_type::_in->flush();
+        if (!out.swap(count)) { return -1; }
+        return count;
+    }
+
+    ConvDecoder::ConvDecoder(dsp::stream<dsp::complex_t>* in) {
+        // Create the convolutional encoder instance
+        conv = correct_convolutional_create(2, 7, correct_conv_r12_7_polynomial);
+
+        // Allocate the soft symbol buffer
+        soft = dsp::buffer::alloc<uint8_t>(STREAM_BUFFER_SIZE);
+        
+        // Init the base class
+        base_type::init(in);
+    }
+
+    ConvDecoder::~ConvDecoder() {
+        // Destroy the convolutional encoder instance
+        correct_convolutional_destroy(conv);
+
+        // Free the soft symbol buffer
+        dsp::buffer::free(soft);
+    }
+
+    int ConvDecoder::decode(const dsp::complex_t* in, uint8_t* out, int count) {
+        // Convert to uint8
+        const float* _in = (const float*)in;
+        count *= 2;
+        for (int i = 0; i < count; i++) {
+            soft[i] = std::clamp<int>((_in[i] * 127.0f) + 128.0f, 0, 255);
+        }
+        
+        // Run convolutional decoder on the data
+        return correct_convolutional_decode_soft(conv, soft, count, out);
+    }
+
+    int ConvDecoder::run() {
+        int count = base_type::_in->read();
+        if (count < 0) { return -1; }
+
+        count = decode(base_type::_in->readBuf, base_type::out.writeBuf, count);
+
+        base_type::_in->flush();
+        if (!out.swap(count)) { return -1; }
+        return count;
+    }
+}