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sal_rtp.h
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#ifndef __MA_RTP_H__
#define __MA_RTP_H__
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif
#endif
#include "sal_standard.h"
typedef struct
{
unsigned char flag;
unsigned char channel;
unsigned short size;
} RTSP_INTERLEAVED_FRAME;
/******************************************************************
RTP_FIXED_HEADER
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 |
| .... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
******************************************************************/
typedef struct
{
/* byte 0 */
unsigned char csrc_len:4; /* CC expect 0 */
unsigned char extension:1;/* X expect 1, see RTP_OP below */
unsigned char padding:1; /* P expect 0 */
unsigned char version:2; /* V expect 2 */
/* byte 1 */
unsigned char payload:7; /* PT RTP_PAYLOAD_RTSP */
unsigned char marker:1; /* M expect 1 */
/* byte 2,3 */
unsigned short seq_no; /*sequence number*/
/* byte 4-7 */
unsigned long timestamp;
/* byte 8-11 */
unsigned long ssrc; /* stream number is used here. */
} RTP_FIXED_HEADER;/*12 bytes*/
/******************************************************************
NALU_HEADER
+---------------+
|0|1|2|3|4|5|6|7|
+-+-+-+-+-+-+-+-+
|F|NRI| Type |
+---------------+
******************************************************************/
typedef struct
{
//byte 0
unsigned char TYPE:5;
unsigned char NRI:2;
unsigned char F:1;
} NALU_HEADER; /* 1 byte */
/******************************************************************
FU_INDICATOR
+---------------+
|0|1|2|3|4|5|6|7|
+-+-+-+-+-+-+-+-+
|F|NRI| Type |
+---------------+
******************************************************************/
typedef struct
{
//byte 0
unsigned char TYPE:5;
unsigned char NRI:2;
unsigned char F:1;
} FU_INDICATOR; /*1 byte */
/******************************************************************
FU_HEADER
+---------------+
|0|1|2|3|4|5|6|7|
+-+-+-+-+-+-+-+-+
|S|E|R| Type |
+---------------+
******************************************************************/
typedef struct
{
//byte 0
unsigned char TYPE:5;
unsigned char R:1;
unsigned char E:1;
unsigned char S:1;
} FU_HEADER; /* 1 byte */
typedef struct
{
int startcodeprefix_len; //! 4 for parameter sets and first slice in picture, 3 for everything else (suggested)
unsigned len; //! Length of the NAL unit (Excluding the start code, which does not belong to the NALU)
unsigned max_size; //! Nal Unit Buffer size
int forbidden_bit; //! should be always FALSE
int nal_reference_idc; //! NALU_PRIORITY_xxxx
int nal_unit_type; //! NALU_TYPE_xxxx
char *buf; //! contains the first byte followed by the EBSP
unsigned short lost_packets; //! true, if packet loss is detected
} NALU_t;
#define UDP_MAX_SIZE (1399)
#define H264 (96)
#define AMR (97)
#define G711 (0)
typedef struct
{
unsigned char* pu8Buf; //存放所有RTP包的buffer
unsigned int u32BufSize; //buffer的大小
unsigned int u32SegmentCount; //RTP包的个数
unsigned char** ppu8Segment; //每一个RTP包的地址offset，来源是pu8Buf
unsigned int* pU32SegmentSize;//每一个RTP包的大小
} RTP_SPLIT_S;
typedef struct
{
int sps_offset;
int sps_len;
int pps_offset;
int pps_len;
int sei_offset;
int sei_len;
int idr_offset;
int idr_len;
} RTP_KEY_S;
/*
函 数 名: rtp_amr_alloc
功能描述: RTP封装AMR的音频帧 每个RTP包都包含RTP OVER TCP的交错帧头
输入参数: _pu8Frame 音频帧
_u32FrameSize 帧大小
_pu16SeqNumber RTP包的序号
_u32Timestamp RTP包的时间戳
_Ssrc RTP包的ssrc
输出参数: _pRetRtpSplit 保存RTP封包的结果，需调用rtp_free来释放
返 回 值: 成功返回0,失败返回小于0
*/
int rtp_amr_alloc(unsigned char* _pu8Frame, unsigned int _u32FrameSize,
unsigned short* _pu16SeqNumber, unsigned int _u32Timestamp,
unsigned long _Ssrc, RTP_SPLIT_S* _pRetRtpSplit);
/*
函 数 名: rtp_g711_alloc
功能描述: RTP封装G711的音频帧 每个RTP包都包含RTP OVER TCP的交错帧头
输入参数: _pu8Frame 音频帧
_u32FrameSize 帧大小
_pu16SeqNumber RTP包的序号
_u32Timestamp RTP包的时间戳
_Ssrc RTP包的ssrc
输出参数: _pRetRtpSplit 保存RTP封包的结果，需调用rtp_free来释放
返 回 值: 成功返回0,失败返回小于0
*/
int rtp_g711a_alloc(unsigned char* _pu8Frame, unsigned int _u32FrameSize,
unsigned short* _pu16SeqNumber, unsigned int _u32Timestamp,
unsigned long _Ssrc, RTP_SPLIT_S* _pRetRtpSplit);
/*
函 数 名: rtp_h264_split
功能描述: h264裸流分割nalu，获取每个nalu的分界点
输入参数: _pu8Frame 视频帧
_u32FrameSize 帧大小
输出参数: 无
返 回 值: 成功返回第二个nalu的分界点,失败返回小于0
*/
int rtp_h264_split(unsigned char* _pu8Frame, unsigned int _u32FrameSize);
/*
函 数 名: rtp_h264_alloc
功能描述: RTP封装h264的视频帧，每个RTP包都包含RTP OVER TCP的交错帧头
输入参数: _pu8Frame 视频帧
_u32FrameSize 帧大小
_pu16SeqNumber RTP包的序号
_u32Timestamp RTP包的时间戳
输出参数: _pRetRtpSplit 保存RTP封包的结果
返 回 值: 成功返回0,失败返回小于0
*/
int rtp_h264_alloc(unsigned char* _pu8Frame, unsigned int _u32FrameSize,
unsigned short* _pu16SeqNumber, unsigned int _u32Timestamp,
RTP_SPLIT_S* _pRetRtpSplit);
/*
函 数 名: rtp_free
功能描述: 释放RTP包封装的资源
输入参数: _pRetRtpSplit 保存RTP封包的结果
输出参数:
返 回 值: 成功返回0,失败返回小于0
*/
int rtp_free(RTP_SPLIT_S* _pRetRtpSplit);
int rtp_payload_get(char* encode_type);
#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif
#endif