rtp.h

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/*******************************************************************************
 * Copyright © 2020 The DTVKit Open Software Foundation Ltd (www.dtvkit.org)
 * Copyright © 2020 Ocean Blue Software Ltd
 *
 * This file is part of a DTVKit Software Component
 * You are permitted to copy, modify or distribute this file subject to the terms
 * of the DTVKit 1.0 Licence which can be found in licence.txt or at www.dtvkit.org
 *
 * THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
 * EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * If you or your organisation is not a member of DTVKit then you have access
 * to this source code outside of the terms of the licence agreement
 * and you are expected to delete this and any associated files immediately.
 * Further information on DTVKit, membership and terms can be found at www.dtvkit.org
 *******************************************************************************/

#ifndef __RTP_H
#define __RTP_H

/*---includes for this file--------------------------------------------------*/

/*---Constant and macro definitions for public use---------------------------*/
#define RTP_VERSION_NUMBER             2
#define RTP_HEADER_LENGTH              12
#define RTCP_HEADER_LENGTH              4
#define FEC_HEADER_SIZE                16

/* RTP Header */
#define RTP_VERSION(x)                 (((x)[0] >> 6) & 0x2)
#define RTP_EXTENSION(x)               (((x)[0] & 0x10) != 0)
#define RTP_CSRCCOUNT(x)               ((x)[0] & 0x0f)
#define RTP_MARKER(x)                  (((x)[1] >> 7) & 0x01)
#define RTP_PAYLOAD(x)                 ((x)[1] & 0x7f)
#define RTP_SEQUENCE(x)                (U16BIT)(((x)[2] << 8) + ((x)[3]))
#define RTP_TIMESTAMP(x)               (U32BIT)(((x)[4] << 24) + ((x)[5] << 16) + ((x)[6] << 8) + ((x)[7]))
#define RTP_SSRC(x)                    (U32BIT)(((x)[8] << 24) + ((x)[9] << 16) + ((x)[10] << 8) + ((x)[11]))

/* RTCP Header */
#define RTCP_RCOUNT(x)                 ((x)[0] & 0x1f)
#define RTCP_PKTTYPE(x)                ((x)[1])
/* RTCP Length in total bytes inc hdr - (not in 32 bit words, excl hdr) */
#define RTCP_LENGTH(x)                 ((x)[2] << 10) + ((x)[3] << 2)

/* FEC Header - coming after RTP header */
#define FEC_SNBASE(x)                  (U16BIT)(((x)[0] << 8) + ((x)[1]))
#define FEC_TS_RECOVERY(x)             (U32BIT)(((x)[8] << 24) | ((x)[9] << 16) | ((x)[10] << 8) | ((x)[11]))
#define FEC_D_BIT(x)                   (((x)[12] >> 6) & 0x01)
#define FEC_OFFSET(x)                  ((x)[13])
#define FEC_COUNT(x)                   ((x)[14]) /* NA */


/*---Enumerations for public use---------------------------------------------*/

/*---Global type defs for public use-----------------------------------------*/

/*---Global variable declarations for public use-----------------------------*/

/*---Global Function prototypes for public use-------------------------------*/

#endif /* __RTP_H */