status.h

#ifndef _STATUS_H
#define _STATUS_H 1
#include <stdint.h>


enum status_type {
  EOL = 0,	  
  COMMAND_TAG,    // Echoes tag from requester
  COMMANDS,       // Count of input commands
  GPS_TIME,       // Nanoseconds since GPS epoch (remember to update the leap second tables!)

  DESCRIPTION,    // Free form text describing source
  INPUT_DATA_SOURCE_SOCKET,
  INPUT_DATA_DEST_SOCKET,
  INPUT_METADATA_SOURCE_SOCKET,
  INPUT_METADATA_DEST_SOCKET,
  INPUT_SSRC,
  INPUT_SAMPRATE, // Nominal sample rate (integer)
  INPUT_METADATA_PACKETS,
  INPUT_DATA_PACKETS,
  INPUT_SAMPLES,
  INPUT_DROPS,
  INPUT_DUPES,

  OUTPUT_DATA_SOURCE_SOCKET,
  OUTPUT_DATA_DEST_SOCKET,
  OUTPUT_SSRC,
  OUTPUT_TTL,
  OUTPUT_SAMPRATE,
  OUTPUT_METADATA_PACKETS,
  OUTPUT_DATA_PACKETS,

  // Hardware
  AD_LEVEL,
  CALIBRATE,
  LNA_GAIN,    // Analog gain = sum of three
  MIXER_GAIN,
  IF_GAIN,
  DC_I_OFFSET,
  DC_Q_OFFSET,
  IQ_IMBALANCE,
  IQ_PHASE,
  DIRECT_CONVERSION, // Boolean indicating SDR is direct conversion -- should avoid DC

  // Tuning
  RADIO_FREQUENCY,
  FIRST_LO_FREQUENCY,
  SECOND_LO_FREQUENCY,
  SHIFT_FREQUENCY,
  DOPPLER_FREQUENCY,
  DOPPLER_FREQUENCY_RATE,

  // Filtering
  LOW_EDGE,
  HIGH_EDGE,
  KAISER_BETA,
  FILTER_BLOCKSIZE,
  FILTER_FIR_LENGTH,
  NOISE_BANDWIDTH,

  // Signals
  IF_POWER,
  BASEBAND_POWER,
  NOISE_DENSITY,

  // Demodulation configuration
  DEMOD_TYPE, // 0 = linear (default), 1 = FM
  OUTPUT_CHANNELS, // 1 or 2 in Linear, otherwise 1
  INDEPENDENT_SIDEBAND, // Linear only
  PLL_ENABLE,
  PLL_LOCK,       // Linear PLL
  PLL_SQUARE,     // Linear PLL
  PLL_PHASE,      // Linear PLL
  ENVELOPE,       // Envelope detection in linear mode
  FM_FLAT,
  
  // Demodulation status
  DEMOD_SNR,      // FM, PLL linear
  FREQ_OFFSET,    // FM, PLL linear
  PEAK_DEVIATION, // FM only
  PL_TONE,        // FM only
  
  // Settable gain parameters
  AGC_ENABLE,     // boolean, linear modes only
  HEADROOM,       // Audio level headroom
  AGC_HANGTIME,   // AGC hang time
  AGC_RECOVERY_RATE,
  AGC_ATTACK_RATE,

  GAIN,     // AM, Linear only
  OUTPUT_LEVEL,     // All modes
  OUTPUT_SAMPLES,

  OPUS_SOURCE_SOCKET,
  OPUS_DEST_SOCKET,
  OPUS_SSRC,
  OPUS_TTL,
  OPUS_BITRATE,
  OPUS_PACKETS,
};


// Previous transmitted state, used to detect changes
struct state {
  int length;
  unsigned char value[256];
};


int encode_string(unsigned char **bp,enum status_type type,void *buf,int buflen);
int encode_eol(unsigned char **buf);
int encode_byte(unsigned char **buf,enum status_type type,unsigned char x);
int encode_int(unsigned char **buf,enum status_type type,int x);
int encode_int16(unsigned char **buf,enum status_type type,uint16_t x);
int encode_int32(unsigned char **buf,enum status_type type,uint32_t x);
int encode_int64(unsigned char **buf,enum status_type type,uint64_t x);
int encode_float(unsigned char **buf,enum status_type type,float x);
int encode_double(unsigned char **buf,enum status_type type,double x);
int encode_socket(unsigned char **buf,enum status_type type,void *sock);

int compact_packet(struct state *s,unsigned char *pkt,int force);

uint64_t decode_int(unsigned char *,int);
float decode_float(unsigned char *,int);
double decode_double(unsigned char *,int);
int decode_socket(void *sock,unsigned char *,int);
char *decode_string(unsigned char *,int,void *,int);

void dump_metadata(unsigned char *,int);

#endif