AudioDataLib

When working with audio libraries (e.g., DirectSound, Oboe, SDL, etc.) that sit between you and the hardware, what they do for you is provide a way to send or receive an audio stream to or from the hardware. What they typically do not do is provide a way to load or save such audio data, convert it, mix it, buffer it, or even synthesize it for real-time consumption. That, however, is what this this library does.

Current features are as follows.

• Load/save WAV files.
• Load MIDI files.
• Load SF2 (sound-font) files.
• Mix/convert PCM/float audio for real-time playback of SFX. (You provide the audio callback.)
• Playback MIDI files. (You provide access to the MIDI port where messages are sent.)
• Synthesize MIDI messages into real-time, SF-based audio. (You provide access to the MIDI port where message are received.)

Documentation

A doxygen-based documentation page has been setup here for the project. As of this writing, it is a work in progress.

Setup

This project is designed to be cross-platform, but I have only tested it on Windows so far. In any case, you would do the following from a command shell.

git clone https://github.com/spencerparkin/AudioDataLib
cd AudioDataLib
mkdir Build
cd Build
cmake ..
cmake --build

The CMakeLists.txt files will need to be updated to point to your wxWidgets and SDL installations if building the tools. If all you care about is the library, then it should build just fine as it only depends on the C++ standard library.

Usage

You can do a lot of things with the library, but here's a quick example of just loading WAV file and then printing some info about it.

#include <WaveFileFormat.h>
#include <AudioData.h>
#include <ByteStream.h>
#include <Error.h>
#include <stdio.h>

using namespace AudioDataLib;

int main(int argc, char** argv)
{
    const char* filePath = "path/to/my_file.wav";
    FileData* fileData = nullptr;
    FileInputStream inputStream(filePath);
    WaveFileFormat fileFormat;
    Error error;

    if(fileFormat.ReadFromStream(inputStream, fileData, error))
        fileData->DumpInfo(stdout);
    else
    {
        fprintf(stderr, "Failed read file: %s\n", filePath);
        fprintf(stderr, "Error: %s\n", error.GetErrorMessage());
    }

    delete fileData;
    return 0;
}

There you have it. Don't be too hard on me. I worked really hard on this stuff.