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payload_starts_idr

o_sfu_rfc::rtp::h264

Function payload_starts_idr 

Source 
pub fn payload_starts_idr(
    payload: &[u8],
    packetization_mode: PacketizationMode,
) -> bool
Expand description

Detects an H264 RTP packet that starts an IDR access unit.

RFC 6184 carries IDR frames either as a single NAL unit, inside a STAP-A aggregation packet or as the first fragment of a FU-A packet.

The input must be the RTP codec payload, not a complete RTP packet. Truncated aggregation packets and incomplete FU-A packets return false. The helper does not parse a full access unit. It only answers whether this packet can refresh a decoder if forwarded.