rtp.c

Purpose

Minimal RTP header/timestamp helpers.

API Reference

uint32_t XRTP_GetTimestamp(float fRate)

• Args:
  • frame rate.
• Does:
  • increments a static RTP timestamp by 90000 / fRate.
• Returns:
  • next timestamp value.

int XRTP_ParseHeader(xrtp_header_t *pHeader, const uint8_t *pData, size_t nLength)

• Args:
  • destination RTP header, raw packet bytes and total length.
• Does:
  • validates version 2 and parses header fields.
• Returns:
  • payload offset on success.
  • XSTDERR on invalid packet.

int XRTP_ParsePacket(xrtp_packet_t *pPacket, uint8_t *pData, size_t nLength)

• Parses RTP header plus the project’s additional 4-byte payload header.
• Returns parsed payload length or XSTDERR.

uint8_t *XRTP_AssemblePacket(xrtp_header_t *pHeader, const uint8_t *pData, size_t nLength)

• Builds one RTP packet into a newly allocated buffer.
• Returns buffer or NULL.