voxelcore/src/audio/alutil.h

#ifndef SRC_AUDIO_AUDIOUTIL_H_
#define SRC_AUDIO_AUDIOUTIL_H_

#include <string>
#include <type_traits>
#include <cstdint>

#ifdef __APPLE__
#include <OpenAL/al.h>
#else
#include <AL/al.h>
#endif

#define alCheckErrorsMacro() check_al_errors(__FILE__, __LINE__)

bool check_al_errors(const std::string& filename, const std::uint_fast32_t line);

bool load_wav_file_header(
    std::ifstream& file,
    std::uint8_t& channels,
    std::int32_t& sampleRate,
    std::uint8_t& bitsPerSample,
    ALsizei& size
);

char* load_wav(
    const std::string& filename,
    std::uint8_t& channels,
    std::int32_t& sampleRate,
    std::uint8_t& bitsPerSample,
    ALsizei& size
);

static inline ALenum to_al_format(short channels, short samples){
    bool stereo = (channels > 1);

    switch (samples) {
    case 16:
        if (stereo)
            return AL_FORMAT_STEREO16;
        else
            return AL_FORMAT_MONO16;
    case 8:
        if (stereo)
            return AL_FORMAT_STEREO8;
        else
            return AL_FORMAT_MONO8;
    default:
        return -1;
    }
}

#endif /* SRC_AUDIO_AUDIOUTIL_H_ */