Hi everyone,

I'm new to game development and have a little c/c++ experience.

The other day i was following this tutorial of XCode GLUT C++ on Youtube:

The above video is about loading a .WAV file using OpenAL in c++.

The youtuber was coding with reference to Microsoft's WAVE PCM soundfile format here:

https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

I have been following his code and explanations but i encountered a problem that i think he didn't.

My sound file is not the same, i got a free mario_01.wav from:

http://www.talkingwav.com/nintendo_wav_sounds.html

According to the soundfile format the AudioFormat should be 1 (Linear Quantization), but i keep getting the value of 85 which indicates it is compressed.

How do i solve this problem?

Should i decompress the file? If yes, how?

Should i get another sound file? how to get the correct AudioFormat ?

Any other way?

Any corrections to the code below?

The following code is the method to load the wave file, the variable AudioFormat is concerned with the issue the issue:

Sound* Sound::loadWAVE(const char* filename) {
    FILE* fp = NULL;
    
    fp = fopen(filename, "r");
    if (!fp) {
        cout << "Could NOT open: " << filename << "!" << endl;
        fclose(fp);
        return NULL;
    }
        
    char* ChunkID = new char[4];
    fread(ChunkID, 4, sizeof(char), fp);
        
    if (strcmp(ChunkID, "RIFF")) {
        delete [] ChunkID;
        cout << "Not RIFF!" << endl;
        fclose(fp);
        return NULL;
    }
    
    fseek(fp, 8, SEEK_SET);
    char* Format = new char[4];
    fread(Format, 4, sizeof(char), fp);
        
    if (strcmp(Format, "WAVE")) {
        delete [] ChunkID;
        delete [] Format;
        cout << "Not WAVE!" << endl;
        fclose(fp);
        return NULL;
    }
    
    char* SubChunk1ID = new char[4];
    fread(SubChunk1ID, 4, sizeof(char), fp);

    if (strcmp(SubChunk1ID, "fmt ")) {
        delete [] ChunkID;
        delete [] Format;
        delete [] SubChunk1ID;
        cout << "Corrupt SubChunk1ID!" << endl;
        fclose(fp);
        return NULL;
    }
    
    unsigned int SubChunk1Size;
    fread(&SubChunk1Size, 1, sizeof(unsigned int), fp);
    unsigned int SubChunk2Location = (unsigned int)ftell(fp) + SubChunk1Size;

    // -------------------------------------- THIS PART

    unsigned short AudioFormat;
    fread(&AudioFormat, 1, sizeof(unsigned short), fp);
    
    if (AudioFormat != 1) { // AudioFormat = 85, should be 1
        delete [] ChunkID;
        delete [] Format;
        delete [] SubChunk1ID;
        cout << "Audio is NOT PCM!" << endl;
        fclose(fp);
        return NULL;
    }

    // --------------------------------------

    unsigned short NumChannels;
    fread(&NumChannels, 1, sizeof(unsigned short), fp);
    unsigned int SampleRate;
    fread(&SampleRate, 1, sizeof(unsigned int), fp);
    
    fseek(fp, 34, SEEK_SET);
    
    unsigned short BitsPerSample;
    fread(&BitsPerSample, 1, sizeof(unsigned short), fp);
    
    int ALFormat;
    if (NumChannels == 1 && BitsPerSample == 8) {
        ALFormat = AL_FORMAT_MONO8;
    } else if (NumChannels == 1 && BitsPerSample == 16) {
        ALFormat = AL_FORMAT_MONO16;
    } else if (NumChannels == 2 && BitsPerSample == 8) {
        ALFormat = AL_FORMAT_STEREO8;
    } else if (NumChannels == 2 && BitsPerSample == 16) {
        ALFormat = AL_FORMAT_STEREO16;
    } else {
        delete [] ChunkID;
        delete [] Format;
        delete [] SubChunk1ID;
        cout << "Audio is Not correctly formatted!" << endl;
        fclose(fp);
        return NULL;
    }
    
    fseek(fp, SubChunk2Location, SEEK_SET);
    char* SubChunk2ID = new char[4];
    fread(SubChunk2ID, 4, sizeof(char), fp);
    
    if (strcmp(SubChunk2ID, "data")) {
        delete [] ChunkID;
        delete [] Format;
        delete [] SubChunk1ID;
        delete [] SubChunk2ID;
        cout << "Corrupt SubChunk2ID!" << endl;
        fclose(fp);
        return NULL;
    }
    
    unsigned int SubChunk2Size;
    fread(&SubChunk2Size, 1, sizeof(unsigned int), fp);
    
    unsigned char* Data = new unsigned char[SubChunk2Size];
    fread(Data, SubChunk2Size, sizeof(unsigned char), fp);
    
    delete [] ChunkID;
    delete [] Format;
    delete [] SubChunk1ID;
    delete [] SubChunk2ID;
    fclose(fp);
    
    return new Sound(ALFormat, SampleRate, Data, SubChunk2Size);
    
}

Thank you in advance for your patience and help!

Thank you for your ideas and help !