init

2026-07-14 00:26:01 +02:00
commit a2f8c110c4
30 changed files with 3525 additions and 0 deletions
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+//
+// Created by bruno on 13. 7. 2026.
+//
+
+#ifndef AUDIOCODER_ENCODER_H
+#define AUDIOCODER_ENCODER_H
+
+#define SAMPLE_RATE 48000
+#define MAX_BITS 16
+#define CLOCK_VOICE MAX_BITS
+#define MAX_PACKET 223
+
+#include <SDL_audio.h>
+#include <stdint.h>
+
+typedef struct SynthVoice {
+    uint32_t phase;
+    uint32_t phaseStep;
+    uint16_t frequency;
+    uint8_t volume;
+} SynthVoice;
+
+typedef enum {
+    TX_IDLE,
+    TX_PREAMBLE,
+    TX_SYNC,
+    TX_DATA,
+    TX_END
+} TxState;
+
+
+typedef struct {
+
+    unsigned int bitCount;
+
+    unsigned int byteIndex;
+    unsigned int bitIndex;
+    uint8_t buffer[1024 * 1024 * 8];
+    unsigned int bufferSize;
+
+
+
+    uint16_t startFreq;
+    uint16_t endFreq;
+    uint16_t dataSpacing;
+
+
+    uint16_t clock0;
+    uint16_t clock1;
+
+    bool clockState;
+
+
+    uint32_t symbolSamples;
+    uint32_t samplesRemaining;
+
+
+    TxState state;
+    uint32_t preambleSymbols;
+    uint32_t syncIndex;
+
+    bool transmitting;
+
+
+} Encoder;
+
+
+typedef struct AudioData {
+    SynthVoice synthVoices[MAX_BITS + 1];
+    Encoder *encoder;
+} AudioData;
+
+extern Encoder encoder;
+extern AudioData encodedAudioData;
+extern SDL_AudioDeviceID dev;
+
+// Internal audio bus for loopback - simple ring buffer
+#define INTERNAL_BUFFER_SIZE 262144
+extern float internalBusSamples[INTERNAL_BUFFER_SIZE];
+extern volatile uint32_t internalBusWrite;
+extern volatile uint32_t internalBusRead;
+
+void startEncoder(Encoder *enc);
+
+void stopEncoder(Encoder *enc);
+
+void initAudioEncoder();
+
+extern const uint8_t syncBytes[4];
+
+#endif //AUDIOCODER_ENCODER_H