Arduino-AppleMIDI-Library/src/rtp_Defs.h at master · lathoub/Arduino-AppleMIDI-Library · GitHub

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#pragma once

#include "AppleMIDI_Namespace.h"

BEGIN_APPLEMIDI_NAMESPACE

// 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 |P|X| CC |M| PT | Sequence number |

// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

#define RTP_VERSION_2 2

// first octet

#define RTP_P_FIELD 0x20

#define RTP_X_FIELD 0x10

#define RTP_CC_FIELD 0x0F

// second octet

#define RTP_M_FIELD 0x80

#define RTP_PT_FIELD 0x7F

/* magic number */

#define PAYLOADTYPE_RTPMIDI 97

/* Version is the first 2 bits of the first octet*/

#define RTP_VERSION(octet) (((octet) >> 6) & 0x03)

/* Padding is the third bit; No need to shift, because true is any value

other than 0! */

#define RTP_PADDING(octet) ((octet)&RTP_P_FIELD)

/* Extension bit is the fourth bit */

#define RTP_EXTENSION(octet) ((octet)&RTP_X_FIELD)

/* CSRC count is the last four bits */

#define RTP_CSRC_COUNT(octet) ((octet)&RTP_CC_FIELD)

/* Marker is the first bit of the second octet */

#define RTP_MARKER(octet) ((octet)&RTP_M_FIELD)

/* Payload type is the last 7 bits */

#define RTP_PAYLOAD_TYPE(octet) ((octet)&RTP_PT_FIELD)

typedef struct PACKED Rtp

{

uint8_t vpxcc;

uint8_t mpayload;

uint16_t sequenceNr;

uint32_t timestamp;

ssrc_t ssrc;

} Rtp_t;

END_APPLEMIDI_NAMESPACE

Arduino-AppleMIDI-Library/src/rtp_Defs.h at master · lathoub/Arduino-AppleMIDI-Library · GitHub

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