linux c 实现rtp头部

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            |
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
|            contributing source (CSRC) identifiers             |
|                              ...                              |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint8_t version:2;
    uint8_t padding:1;
    uint8_t extension:1;
    uint8_t csrc_count:4;
    uint8_t marker:1;
    uint8_t payload_type;
    uint16_t sequence_number;
    uint32_t timestamp;
    uint32_t ssrc;
} RTPHeader;

void create_rtp_header(RTPHeader *header, uint8_t payload_type, uint16_t sequence_number, uint32_t timestamp, uint32_t ssrc) {
    header->version = 2;
    header->padding = 0;
    header->extension = 0;
    header->csrc_count = 0;
    header->marker = 0;
    header->payload_type = payload_type;
    header->sequence_number = sequence_number;
    header->timestamp = timestamp;
    header->ssrc = ssrc;
}

void print_rtp_header(RTPHeader *header) {
    printf("RTP Header:\n");
    printf("Version: %d\n", header->version);
    printf("Padding: %d\n", header->padding);
    printf("Extension: %d\n", header->extension);
    printf("CSRC Count: %d\n", header->csrc_count);
    printf("Marker: %d\n", header->marker);
    printf("Payload Type: %d\n", header->payload_type);
    printf("Sequence Number: %d\n", header->sequence_number);
    printf("Timestamp: %u\n", header->timestamp);
    printf("SSRC: %u\n", header->ssrc);
}

int main() {
    RTPHeader header;
    create_rtp_header(&header, 96, 12345, 1633072800, 54321);
    print_rtp_header(&header);
    return 0;
}