mini_al is a simple library for playing and recording audio. It's focused on simplicity and has a very small number of APIs. This is not a full-featured audio library - it is intended to be used as a quick and easy way to connect to an audio device and deliver and capture audio data from speakers and microphones.

C/C++, single file, public domain.

Features

• Public domain
• Single file
• A very simple API

Simple Playback Example

#define MAL_IMPLEMENTATION
#include "../mini_al.h"

#define DR_WAV_IMPLEMENTATION
#include "dr_wav.h"

#include <stdio.h>

// This is the function that's used for sending more data to the device for playback.
mal_uint32 on_send_frames_to_device(mal_device* pDevice, mal_uint32 frameCount, void* pSamples)
{
    drwav* pWav = (drwav*)pDevice->pUserData;
    if (pWav == NULL) {
        return 0;
    }

    return (mal_uint32)drwav_read_f32(pWav, frameCount * pDevice->channels, (float*)pSamples) / pDevice->channels;
}

int main(int argc, char** argv)
{
    if (argc < 2) {
        printf("No input file.");
        return -1;
    }

    drwav wav;
    if (!drwav_init_file(&wav, argv[1])) {
        printf("Not a valid WAV file.");
        return -2;
    }

    mal_context context;
    if (mal_context_init(NULL, 0, &context) != MAL_SUCCESS) {
        printf("Failed to initialize context.");
        return -3;
    }

    // In this example we use the default playback device with a default buffer size and period count.
    mal_device_config config;
    config.format = mal_format_f32;
    config.channels = wav.channels;
    config.sampleRate = wav.sampleRate;
    config.bufferSizeInFrames = 0;  // Use default.
    config.periods = 0;             // Use default.
    config.onRecvCallback = NULL;   // Not used for playback.
    config.onSendCallback = on_send_frames_to_device;
    config.onStopCallback = NULL;
    config.onLogCallback  = NULL;

    mal_device device;
    if (mal_device_init(&context, mal_device_type_playback, NULL, &config, &wav, &device) != MAL_SUCCESS) {
        printf("Failed to open playback device.");
        mal_context_uninit(&context);
        drwav_uninit(&wav);
        return -4;
    }
    mal_device_start(&device);

    printf("Press Enter to quit...");
    getchar();

    mal_device_uninit(&device);
    mal_context_uninit(&context);
    drwav_uninit(&wav);

    return 0;
}