## libsndfile Binding for the Ada Programming Language

This is a thick binding of [libsndfile](https://libsndfile.github.io/libsndfile/)
so effort has been made to get rid of all C-isms and C-specific types wherever
possible. In particular:

<ul>
  <li>All error codes have been converted to exceptions</li>
  <li>Void pointers are completely absent</li>
  <li>The command API has been mapped to a more ordinary collection of
  subprograms instead of the single function it is in C</li>
</ul>

The package hierarchy is as follows:

<ul>
  <li>Libsndfile (Everything that isn't virtual IO or the command API)
    <ul>
      <li>Libsndfile.Commands (The command API datatypes and subprograms)</li>
      <li>Libsndfile.Virtual (The virtual IO interface)</li>
    </ul>
  </li>
</ul>

A few short example programs are available in the `example` subdirectory.

Please note that at the moment this binding is incomplete, as the RIFF chunk
API is not bound. If anyone has a pressing need for it let me know.

Finally, there appears to be a subtle bug in the virtual IO that causes the
frame count to be one lower than it should be. I am currently unsure of the
exact cause. Since the behaviour is the same regardless of whether using the
virtual IO in C or in Ada, the likely culprit is in the library itself.



#### Dependencies

Build time:
<ul>
  <li>gcc</li>
  <li>GNAT</li>
  <li>GPRbuild</li>
  <li>libsndfile</li>
</ul>

Run time:
<ul>
  <li>libsndfile</li>
</ul>



#### Building and Installation

This repository is written to use the GNAT Project Manager build tools. To
build, use the following command

`gprbuild asndfile.gpr`

There is a single build switch of `-Xbuild` which can have a value of `release`
(the default) or `debug`.

To install the binding, use

`gprinstall -p -m asndfile.gpr`

The other gpr file `example.gpr` can be used to build the short example
programs provided.

For further information on the build tools, consult the
[GPRbuild docs](https://docs.adacore.com/gprbuild-docs/html/gprbuild_ug.html).



#### Credits and Licensing

This binding and the Ada test/example programs were written by Jedidiah Barber.

All code of this binding and example programs is released into the public
domain. Consult `unlicense.txt` for further information.