添加c语言rtp推流的实现

device/rtp.cpp

@@ -0,0 +1,61 @@
+//
+// Created by 29019 on 2019/5/4.
+//
+
+#include "rtp.h"
+
+int Pack264(unsigned char *frame,int size, unsigned char *outbuf[]){
+    if((nullptr == frame) || (nullptr == outbuf)){
+        return 0;
+    }
+    if((frame[0] != 0x00)&&(frame[1] != 0x00)&&(frame[2] != 0x00) && (frame[3] != 0x01)){
+        return -1;
+    }
+    int packCnt = (size - 4) /MAX_RTP_LEN;
+    if(packCnt % MAX_RTP_LEN != 0){
+        packCnt +=1;
+    }
+    outbuf = (unsigned char **)malloc(sizeof(unsigned char *)*packCnt);
+    RtspInterleavedFrameHeader rtspInterleavedFrameHeader;
+    rtspInterleavedFrameHeader.magic = 0x24;
+    rtspInterleavedFrameHeader.channel = 0;
+
+    CRtpHeader header;
+    header.version = 2;
+    header.cc = 0;
+    header.m = 0;
+    header.p = 0;
+    header.pt = 96;
+    header.seq = 1;
+    header.ts = 0x1234;
+    header.x = 0;
+    header.ssrc = 0x1235;
+
+    CH264NalUnit nalUnit;
+    nalUnit.Identifier.FUType = 28;
+    nalUnit.Identifier.NRI = 2;
+    nalUnit.Identifier.F = 0;
+    nalUnit.Header.NALUnitType = 1; // idr picture
+    nalUnit.Header.Forbid = 0;
+
+    for(int i = 0;i < packCnt;i++) {
+        if(i == packCnt - 1){
+            nalUnit.Header.End = 1;
+            nalUnit.Header.Start = 0;
+            rtspInterleavedFrameHeader.length = MAX_RTP_LEN + sizeof(CH264NalUnit) + sizeof(CRtpHeader);
+
+        }else if(i == 0){
+            char *rtpBuf = (char *)malloc(MAX_RTP_LEN + sizeof(CH264NalUnit) + sizeof(CRtpHeader) +
+                                          sizeof(RtspInterleavedFrameHeader));
+            rtspInterleavedFrameHeader.length = MAX_RTP_LEN + sizeof(CH264NalUnit) + sizeof(CRtpHeader);
+            nalUnit.Header.End = 0;
+            nalUnit.Header.Start = 1;
+        }else{
+            nalUnit.Header.End = 0;
+            nalUnit.Header.Start = 0;
+            rtspInterleavedFrameHeader.length = MAX_RTP_LEN + sizeof(CH264NalUnit) + sizeof(CRtpHeader);
+
+        }
+    }
+    return packCnt;
+}

device/rtp.h

@@ -0,0 +1,42 @@
+#ifndef __RTP_PACK__
+#define __RTP_PACK__
+
+#pragma pack(1)//设定为1字节对齐
+
+#include <stdio.h>
+#include <memory.h>
+#include <stdlib.h>
+#include "thirdparty/librtsp_c/librtsp.h"
+#include "rtsp.h"
+typedef struct {
+    unsigned char cc:4;        /* CSRC count */
+    unsigned char x:1;         /* header extension flag */
+    unsigned char p:1;         /* padding flag */
+    unsigned char version:2;   /* protocol version */
+    unsigned char pt:7;        /* payload type */
+    unsigned char m:1;         /* marker bit */
+    unsigned short seq;      /* sequence number */
+    unsigned int ts;               /* timestamp */
+    unsigned int ssrc;             /* synchronization source */
+} CRtpHeader;
+typedef struct {
+    unsigned char FUType:5;
+    unsigned char NRI:2;
+    unsigned char F:1;
+}FuIdentifier;
+typedef struct {
+    unsigned char NALUnitType:5;
+    unsigned char Forbid:1;
+    unsigned char End:1;
+    unsigned char Start:1;
+}FuHeader;
+typedef struct {
+    FuIdentifier Identifier;
+    FuHeader Header;
+} CH264NalUnit;
+
+#pragma pack(4)//设定为4字节对齐
+#define  MAX_RTP_LEN 1001
+
+int Pack264(unsigned char *frame,int size, unsigned char *outbuf[]);
+#endif