log2wav.c

// Jan. 2021
// by paul, inspired / recycled from microchip code by SMIOT
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>

#define MAX_PERIPHERAL 5                   //Nombre max de peripheriques externes

typedef struct{
    char Type;                                       //type du peripherique (0x01 accel, 0x02 gyro, 0x03 magneto, 0x04 temperature, 0x05 pressure, 0x06 light,...)
    char ID;                                         //ID du peripherique
    char Range;                                      //Range de la mesure (ex: 2G, 4G, 6G, 8G, 16G pour un accel)
    char Resolution;                                 //Resolution de mesure du peripherique
    short Frequency;                                  //Frequence d'echantillonage du peripherique
}PERIPHERAL_CONFIGURATION;

typedef struct{
    int headerSize;       //Taille du header ce champ exclu
    int versionNumber;
    char numberOfChan;
    char resolutionBits;
    int samplingFrequency;
    int dmaBlockSize;
    int sizeOfAdditionnalDataBuffer;
    char numberOfExternalPeripheral;
    int timeStampOfStart;
    PERIPHERAL_CONFIGURATION periphConfig[MAX_PERIPHERAL];
}HighBlueHeader;

struct WaveHeader_s {
    char chunkId[4]; // Riff Wave Header
    int  chunkSize;
    char format[4];
    char subChunk1Id[4]; // Format Subchunk
    int  subChunk1Size;
    short int audioFormat;
    short int numChannels;
    int sampleRate;
    int byteRate;
    short int blockAlign;
    short int bitsPerSample;
    //short int extraParamSize;
    char subChunk2Id[4]; // Data Subchunk
    int  subChunk2Size;
} WaveHeader_default = {{'R','I','F','F'}, 36, {'W','A','V','E'}, {'f','m','t',' '}, 16, 1, 0, 0, 0, 0, 0, {'d','a','t','a'}, 0};
typedef struct WaveHeader_s WaveHeader;


void parseLogFileHeader(FILE* logfile, HighBlueHeader* hdr, int verbose){
  // header parse
  fread(&hdr->headerSize, 4, 1, logfile);
  fread(&hdr->versionNumber, 2, 1, logfile);
  fread(&hdr->numberOfChan, 1, 1, logfile);
  fread(&hdr->resolutionBits, 1, 1, logfile);
  fread(&hdr->samplingFrequency, 4, 1, logfile);
  fread(&hdr->dmaBlockSize, 4, 1, logfile);
  fread(&hdr->sizeOfAdditionnalDataBuffer, 4, 1, logfile);
  fread(&hdr->numberOfExternalPeripheral, 1, 1, logfile);
  fread(&hdr->timeStampOfStart, 4, 1, logfile);
  if(verbose){
    printf("header size : %d\n", hdr->headerSize);
    printf("version number : %d\n", hdr->versionNumber);
    printf("number of chans : %d\n", hdr->numberOfChan);
    printf("resolutionBits : %d\n", hdr->resolutionBits);
    printf("samplingFrequency : %d\n", hdr->samplingFrequency);
    printf("dmaBlockSize : %d\n", hdr->dmaBlockSize);
    printf("sizeOfAdditionnalDataBuffer : %d\n", hdr->sizeOfAdditionnalDataBuffer);
    printf("numberOfExternalPeripheral : %d\n", hdr->numberOfExternalPeripheral);