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[rtp] Extra commenting about the RTP header

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This commit is contained in:
ejurgensen 2019-02-28 23:18:42 +01:00
parent d762bd0a56
commit 9b6a892984
1 changed files with 11 additions and 1 deletions
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12
src/outputs/rtp_common.c
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@ -156,7 +156,17 @@ rtp_packet_next(struct rtp_session *session, size_t payload_len, int samples, ch
pkt->data_len = RTP_HEADER_LEN + payload_len;
pkt->seqnum = session->seqnum;
// RTP Header
// The RTP header is made of these 12 bytes (RFC 3550):
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |V=2|P|X| CC |M| PT | sequence number |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | timestamp |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | synchronization source (SSRC) identifier |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
pkt->header[0] = 0x80; // Version = 2, P, X and CC are 0
pkt->header[1] = type; // RTP payload type