Crate h264_profile_level_id

Idiomatic Rust port of https://github.com/ibc/h264-profile-level-id by Iñaki Baz Castillo.

Rust utility to process H264 profile-level-id values based on Google’s libwebrtc C++ code.

Basic usage example:

use h264_profile_level_id::{Profile, Level, ProfileLevelId};

fn main () {
    let profile_level_id: ProfileLevelId = "42e01f".parse().unwrap();

    assert_eq!(profile_level_id.profile(), Profile::ConstrainedBaseline);
    assert_eq!(profile_level_id.level(), Level::Level31);

    let s = profile_level_id.to_string();

    assert_eq!(s.as_str(), "42e01f");

    let local_profile_level_id = "42e01f".parse::<ProfileLevelId>().ok();
    let local_level_asymmetry_allowed = true;

    let remote_profile_level_id = "42e015".parse::<ProfileLevelId>().ok();
    let remote_level_asymmetry_allowed = true;

    assert_eq!(
        h264_profile_level_id::generate_profile_level_id_for_answer(
            local_profile_level_id,
            local_level_asymmetry_allowed,
            remote_profile_level_id,
            remote_level_asymmetry_allowed
        ),
        Ok("42e01f".parse::<ProfileLevelId>().unwrap()),
    );
}

Structs

• ProfileLevelId
  A container encapsulating both H264 profile and level as parsed from a profile-level-id string

Enums

• GenerateProfileLevelIdForAnswerError
• Level
• ParseProfileLevelIdError
• Profile

Functions

• generate_profile_level_id_for_answer
  Generate codec parameters that will be used as answer in an SDP negotiation based on local supported parameters and remote offered parameters. Both local_profile_level_id and remote_profile_level_id represent sendrecv media descriptions, i.e they are a mix of both encode and decode capabilities. In theory, when the profile in local_profile_level_id represent a strict superset of the profile in remote_profile_level_id, we could limit the profile in the answer to the profile in remote_profile_level_id.
• is_same_profile
  Returns Some with parsed profiles if string profile-level-id correspond to the same H264 profile (Baseline, High, etc).