osc-codec-json

⚠️ EXPERIMENTAL ⚠️
This crate is experimental and APIs may change significantly between versions.

JSON codec for the osc-ir intermediate representation, enabling seamless conversion between OSC data structures and JSON format.

Features

• Bidirectional Conversion: Convert IrValue to/from JSON
• Bundle Support: Full support for OSC bundles with nested structures
• Type Preservation: Special handling for binary data, timestamps, and extended types
• OSC Compatibility: Support for OSC 1.0 and 1.1 features via feature flags

Usage

Add this to your Cargo.toml:

[dependencies]
osc-codec-json = "0.1.0-alpha.1"

Basic Example

use osc_ir::{IrValue, IrBundle, IrTimetag};
use osc_codec_json::{to_json, from_json};

// Create some data
let mut bundle = IrBundle::new(IrTimetag::from_ntp(12345));
bundle.add_message(IrValue::from("hello"));
bundle.add_message(IrValue::from(42));

let value = IrValue::Bundle(bundle);

// Convert to JSON
let json = to_json(&value);
println!("{}", serde_json::to_string_pretty(&json).unwrap());

// Convert back from JSON
let restored = from_json(&json);
assert_eq!(value, restored);

Special Type Handling

The codec handles OSC-specific types with special JSON representations:

Binary Data

let binary = IrValue::Binary(vec![0xAA, 0xBB, 0xCC]);
let json = to_json(&binary);
// Results in: {"$type": "binary", "data": "qrvM"}

Timestamps

let timestamp = IrValue::from(osc_ir::IrTimestamp {
    seconds: 1234567890,
    nanos: 500_000_000
});
let json = to_json(&timestamp);
// Results in: {"$type": "timestamp", "seconds": 1234567890, "nanos": 500000000}

Extended Types

let ext = IrValue::Ext {
    type_id: 42,
    data: vec![1, 2, 3, 4]
};
let json = to_json(&ext);
// Results in: {"$type": "ext", "ext": 42, "data": "AQIDBA=="}

OSC Bundles

Bundles are represented with nested structure preservation:

let mut root = IrBundle::immediate();
root.add_message(IrValue::from("root message"));

let mut nested = IrBundle::new(IrTimetag::from_ntp(1000));
nested.add_message(IrValue::from("nested message"));
root.add_bundle(nested);

let json = to_json(&IrValue::Bundle(root));
// Results in properly nested JSON structure with timetags

Feature Flags

• osc10 (default): OSC 1.0 support
• osc11: OSC 1.1 support (includes Color and MIDI types)

Note: OSC 1.1 Color and MIDI types are currently marked as TODO and serialize to null.

API Reference

Functions

• to_json(value: &IrValue) -> serde_json::Value - Convert IR to JSON
• from_json(json: &serde_json::Value) -> IrValue - Convert JSON to IR

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.