mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2026-06-23 17:32:21 +08:00
93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
|
//
|
|||
|
|
// Created by xzl on 2018/10/18.
|
|||
|
|
//
|
|||
|
|
|
|||
|
|
#include "H264RtpEncoder.h"
|
|||
|
|
|
|||
|
|
void H264RtpEncoder::inputFame(const Frame::Ptr &frame, bool key_pos) {
|
|||
|
|
RtpCodec::inputFame(frame, key_pos);
|
|||
|
|
|
|||
|
|
GET_CONFIG_AND_REGISTER(uint32_t,cycleMS,Config::Rtp::kCycleMS);
|
|||
|
|
auto uiStamp = frame->stamp();
|
|||
|
|
auto pcData = frame->data();
|
|||
|
|
auto iLen = frame->size();
|
|||
|
|
|
|||
|
|
uiStamp %= cycleMS;
|
|||
|
|
int iSize = m_ui32MtuSize - 2;
|
|||
|
|
if (iLen > iSize) { //超过MTU
|
|||
|
|
const unsigned char s_e_r_Start = 0x80;
|
|||
|
|
const unsigned char s_e_r_Mid = 0x00;
|
|||
|
|
const unsigned char s_e_r_End = 0x40;
|
|||
|
|
//获取帧头数据，1byte
|
|||
|
|
unsigned char naluType = *((unsigned char *) pcData) & 0x1f; //获取NALU的5bit 帧类型
|
|||
|
|
|
|||
|
|
unsigned char nal_ref_idc = *((unsigned char *) pcData) & 0x60; //获取NALU的2bit 帧重要程度 00 可以丢 11不能丢
|
|||
|
|
//nal_ref_idc = 0x60;
|
|||
|
|
//组装FU-A帧头数据 2byte
|
|||
|
|
unsigned char f_nri_type = nal_ref_idc + 28;//F为0 1bit,nri上面获取到2bit,28为FU-A分片类型5bit
|
|||
|
|
unsigned char s_e_r_type = naluType;
|
|||
|
|
bool bFirst = true;
|
|||
|
|
bool mark = false;
|
|||
|
|
int nOffset = 1;
|
|||
|
|
while (!mark) {
|
|||
|
|
if (iLen < nOffset + iSize) { //是否拆分结束
|
|||
|
|
iSize = iLen - nOffset;
|
|||
|
|
mark = true;
|
|||
|
|
s_e_r_type = s_e_r_End + naluType;
|
|||
|
|
} else {
|
|||
|
|
if (bFirst == true) {
|
|||
|
|
s_e_r_type = s_e_r_Start + naluType;
|
|||
|
|
bFirst = false;
|
|||
|
|
} else {
|
|||
|
|
s_e_r_type = s_e_r_Mid + naluType;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
memcpy(m_aucSectionBuf, &f_nri_type, 1);
|
|||
|
|
memcpy(m_aucSectionBuf + 1, &s_e_r_type, 1);
|
|||
|
|
memcpy(m_aucSectionBuf + 2, (unsigned char *) pcData + nOffset, iSize);
|
|||
|
|
nOffset += iSize;
|
|||
|
|
makeH264Rtp(m_aucSectionBuf, iSize + 2, mark, uiStamp);
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
makeH264Rtp(pcData, iLen, true, uiStamp);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void H264RtpEncoder::makeH264Rtp(const void* data, unsigned int len, bool mark, uint32_t uiStamp) {
|
|||
|
|
uint16_t ui16RtpLen = len + 12;
|
|||
|
|
m_ui32TimeStamp = (m_ui32SampleRate / 1000) * uiStamp;
|
|||
|
|
uint32_t ts = htonl(m_ui32TimeStamp);
|
|||
|
|
uint16_t sq = htons(m_ui16Sequence);
|
|||
|
|
uint32_t sc = htonl(m_ui32Ssrc);
|
|||
|
|
|
|||
|
|
auto pRtppkt = obtainRtp();
|
|||
|
|
auto &rtppkt = *(pRtppkt.get());
|
|||
|
|
unsigned char *pucRtp = rtppkt.payload;
|
|||
|
|
pucRtp[0] = '$';
|
|||
|
|
pucRtp[1] = m_ui8Interleaved;
|
|||
|
|
pucRtp[2] = ui16RtpLen >> 8;
|
|||
|
|
pucRtp[3] = ui16RtpLen & 0x00FF;
|
|||
|
|
pucRtp[4] = 0x80;
|
|||
|
|
pucRtp[5] = (mark << 7) | m_ui8PlayloadType;
|
|||
|
|
memcpy(&pucRtp[6], &sq, 2);
|
|||
|
|
memcpy(&pucRtp[8], &ts, 4);
|
|||
|
|
//ssrc
|
|||
|
|
memcpy(&pucRtp[12], &sc, 4);
|
|||
|
|
//playload
|
|||
|
|
memcpy(&pucRtp[16], data, len);
|
|||
|
|
|
|||
|
|
rtppkt.PT = m_ui8PlayloadType;
|
|||
|
|
rtppkt.interleaved = m_ui8Interleaved;
|
|||
|
|
rtppkt.mark = mark;
|
|||
|
|
rtppkt.length = len + 16;
|
|||
|
|
rtppkt.sequence = m_ui16Sequence;
|
|||
|
|
rtppkt.timeStamp = m_ui32TimeStamp;
|
|||
|
|
rtppkt.ssrc = m_ui32Ssrc;
|
|||
|
|
rtppkt.type = TrackVideo;
|
|||
|
|
rtppkt.offset = 16;
|
|||
|
|
|
|||
|
|
uint8_t type = ((uint8_t *) (data))[0] & 0x1F;
|
|||
|
|
RtpCodec::inputRtp(pRtppkt,type == 5);
|
|||
|
|
m_ui16Sequence++;
|
|||
|
|
}
|