Video and audio codec implementations

Implementation Status

The current codec implementations are stub/simulation implementations designed for:

• Development and testing without external codec libraries
• API design validation and interface stabilization
• Performance testing of the transport layer

OpenH264 (Video)

• Current: Simulation using compression (achieves ~25% size reduction for testing)
• Production: Will integrate with real openh264 crate when h264 feature is enabled
• Status: Safe for development/testing, not for production video calls

Opus (Audio)

• Current: Simulation with frame size validation and format conversion
• Production: Will integrate with real opus crate when opus feature is enabled
• Status: Safe for development/testing, not for production audio calls

Migration Path

To use real codecs in production:

1. Enable the respective features: features = ["h264", "opus"]
2. Replace stub implementations in openh264.rs and opus.rs
3. Run integration tests with actual codec libraries

The stub implementations maintain the same API surface, so migration is transparent to users.