Opus format with Ogg codec for BufferStream

[alnitak]

Description

BufferType to use in setBufferStream, now support also opus as data type. When adding audio chunks using addAudioDataStream using Opus, it now expects to receive a stream of an Opus file.
This can be useful for example when you have a stream coming from a network and you want to play it in real-time. Tested with the Opus coming from OpenAI's Text-To-Speech APIs.

To achieve this I've used Xiph Ogg and Opus libraries.

working on

• Linux
• Android
• Windows
• iOS
• MacOS
• Web

Use external Xiph libraries where possible:

• Linux
• MacOS

This means the opus and ogg libraries are embedded in iOS, Android, and Windows. On MacOS and Linux, you should install them with brew install libogg opus or with your distribution's package manager. If not installed, it compiles anyway, but it will throw if you want to use the opus streaming feature.

---

To avoid future incompatibilities when using other WASM compiled plugins, it is now necessary to add init_module.dart.js script to index.html:

<script src="assets/packages/flutter_soloud/web/libflutter_soloud_plugin.js" defer></script>
<script src="assets/packages/flutter_soloud/web/init_module.dart.js" defer></script>

By default when compiling a WASM library the default name for the JS module is Module and AFAIK only one can exist. Now the module name is called Module_soloud and it needs to be initialized.

---

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore