OVIA:

• OVIA is multimedia framework; it's the LLVM of multimedia codecs and formats.
• The name is a pronounceable acronym for Input Output Audio Video.

License:

• Contributions are accepted only under the terms of the 'Unlicense' license.
• OVIA is released under the terms of the Apache 2.0 license.

Here's a tl;dr of my license:

• Do If you permanently fork OVIA, change the name to reduce confusion.
• Do include in your acknowledgments a link to OVIA on GitHub.
• Don't plagiarize OVIA.
• Don't relicense OVIA.
• Don't sue me if something goes wrong. I have and will never guarantee OVIA works for anything, you figure out if it's right for you.

OVIA API:

OVIA has two APIs, the Internal API, and the External or Public API. ** External API **:

• include OVIA.h to get access to the External API.
• The External API allows users of OVIA to open Files and Streams, identify their content, and extract/create new streams from various data sources.

** Internal API **: The Internal API is composed of about half a dozen interfaces; those interfaces are:

• StreamIO: Provides a consistent interface for packet and chunk based formats.
• CodecIO: Abstracts away differences in Codecs and provides a consistent interface to encode/decode various codecs.
• EntropyIO: Provides various entropy coders to increase code sharing between codecs.
• TagIO: Provides a consistent interface for various metadata systems in use by various codecs/formats.
• MediaIO: Provides an abstraction to contain audio samples and image frames.

Dependencies:

OVIA depends on FoundationIO for various subsystems, like Text handling (especially Unicode), File/Network access, bit reading/writing, and more.

• So either clone OVIA with the --recurse-submodules flag, or if you've already cloned it you can use git submodule update --init --recursive to clone FoundationIO.
• OVIA also includes a submodule containing the proprietary LIVC project that won't be checked out without the correct access rights; ignore any warnings about that, the build system is designed to compile and run without it.