#include <stdio.h>
#include <stdint.h>

// Definition Wav struct
struct Wav
{
    char chunkID[4];
    uint32_t chunkSize;
    char format[4];
    char subchunk1ID[4];
    uint32_t subchunk1Size;
    uint16_t audioFormat;
    uint16_t numChannels;
    uint32_t sampleRate;
    uint32_t byteRate;
    uint16_t blockAlign;
    uint16_t bitsPerSample;
    char subchunk2ID[4];
    uint32_t subchunk2Size;
    
};

// Union zum Auslesen des Wav struct
union ReadWav
{
    struct Wav header;
    char c[44];
};

int main()
{
    char inputFileName[260];

    printf("Input file name: ");
    scanf("%s", inputFileName);

    // FILE pointer auf Datei zum einlesen
    FILE *inputFile = fopen(inputFileName, "r");

    if (!inputFile)
    {
        printf("Input file not found/corrupted!\n");
        return 1;
    }

    // Wav-Header über char Array einlesen und Freigabe von FILE pointer
    union ReadWav wavData;
    fread(wavData.c, sizeof(wavData.c), 1, inputFile);
    fclose(inputFile);

    // Headerdaten über struct ausgeben
    printf("ChunkID: %.4s\n", wavData.header.chunkID);
    printf("ChunkSize: %d bytes\n", wavData.header.chunkSize);
    printf("Format: %.4s\n", wavData.header.format);
    printf("Subchunk1ID: %.4s\n", wavData.header.subchunk1ID);
    printf("Subchunk1Size: %d bytes\n", wavData.header.subchunk1Size);
    printf("AudioFormat: %d\n", wavData.header.audioFormat);
    printf("NumChannels: %d\n", wavData.header.numChannels);
    printf("SampleRate: %d Hz\n", wavData.header.sampleRate);
    printf("ByteRate: %d bytes/second\n", wavData.header.byteRate);
    printf("BlockAlign: %d bytes\n", wavData.header.blockAlign);
    printf("BitsPerSample: %d\n", wavData.header.bitsPerSample);
    printf("Subchunk2ID: %.4s\n", wavData.header.subchunk2ID);
    printf("Subchunk2Size: %d bytes\n", wavData.header.subchunk2Size);

    return 0;
}