mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-01 17:11:31 +08:00
388 lines
10 KiB
C++
388 lines
10 KiB
C++
//
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// Created by xzl on 2018/9/18.
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//
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#ifndef ZLMEDIAKIT_RTSPMAKER_H
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#define ZLMEDIAKIT_RTSPMAKER_H
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#include "RTP/H264RtpCodec.h"
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#include "RTP/AACRtpCodec.h"
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#include "Util/base64.h"
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namespace ZL{
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namespace Rtsp{
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/**
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* sdp基类
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*/
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class Sdp : public FrameRingInterface , public RtpRingInterface , public CodecInfo{
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public:
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typedef std::shared_ptr<Sdp> Ptr;
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/**
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* 构造sdp
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* @param sample_rate 采样率
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* @param playload_type pt类型
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*/
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Sdp(uint32_t sample_rate, uint8_t playload_type){
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_sample_rate = sample_rate;
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_playload_type = playload_type;
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}
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virtual ~Sdp(){}
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/**
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* 获取sdp字符串
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* @return
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*/
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virtual string getSdp() const = 0;
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/**
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* 返回音频或视频类型
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* @return
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*/
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TrackType getTrackType() const override {
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return TrackInvalid;
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}
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/**
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* 返回编码器id
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* @return
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*/
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CodecId getCodecId() const override{
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return CodecInvalid;
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}
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/**
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* 获取帧环形缓存
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* @return
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*/
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FrameRingInterface::RingType::Ptr getFrameRing() const override {
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return _encoder->getFrameRing();
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}
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/**
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* 获取rtp环形缓存
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* @return
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*/
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RtpRingInterface::RingType::Ptr getRtpRing() const override{
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return _encoder->getRtpRing();
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}
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/**
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* 输入帧数据，驱动rtp打包
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* @param frame 帧数据
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*/
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void inputFrame(const Frame::Ptr &frame) override{
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_encoder->inputFrame(frame);
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}
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/**
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* 也可以在外部打包rtp后直接输入rtp
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* @param rtp rtp数据包
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* @param key_pos 是否为关键帧第一个rtp包
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*/
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bool inputRtp(const RtpPacket::Ptr &rtp, bool key_pos) override{
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return _encoder->inputRtp(rtp,key_pos);
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}
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/**
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* 替换帧环形缓存，目的是多个rtp打包器共用一个环形缓存
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* @param ring
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*/
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void setFrameRing(const FrameRingInterface::RingType::Ptr &ring) override{
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_encoder->setFrameRing(ring);
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}
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/**
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* 替换帧环形缓存，目的是多个rtp打包器共用一个环形缓存
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* @param ring
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*/
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void setRtpRing(const RtpRingInterface::RingType::Ptr &ring) override{
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_encoder->setRtpRing(ring);
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}
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/**
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* 创建Rtp打包器
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* @param ssrc 打包器ssrc，可以为0
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* @param mtu mtu大小，一般小于1500字节，推荐1400
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*/
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virtual void createRtpEncoder(uint32_t ssrc, int mtu) {
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_encoder = RtpCodec::getRtpEncoderById(getCodecId(),
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ssrc,
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mtu,
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_sample_rate,
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_playload_type,
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getTrackType() * 2);
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}
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private:
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RtpCodec::Ptr _encoder;
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uint8_t _playload_type;
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uint32_t _sample_rate;
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};
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/**
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* sdp中除音视频外的其他描述部分
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*/
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class TitleSdp : public Sdp{
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public:
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/**
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* 构造title类型sdp
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* @param dur_sec rtsp点播时长，0代表直播，单位秒
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* @param header 自定义sdp描述
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* @param version sdp版本
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*/
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TitleSdp(float dur_sec = 0,
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const map<string,string> &header = map<string,string>(),
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int version = 0) : Sdp(0,0){
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_printer << "v=" << version << "\r\n";
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if(!header.empty()){
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for (auto &pr : header){
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_printer << pr.first << "=" << pr.second << "\r\n";
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}
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} else {
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_printer << "o=- 1383190487994921 1 IN IP4 0.0.0.0\r\n";
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_printer << "s=RTSP Session, streamed by the ZLMediaKit\r\n";
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_printer << "i=ZLMediaKit Live Stream\r\n";
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_printer << "c=IN IP4 0.0.0.0\r\n";
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_printer << "t=0 0\r\n";
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}
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if(dur_sec <= 0){
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_printer << "a=range:npt=0-\r\n";
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}else{
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_printer << "a=range:npt=0-" << dur_sec << "\r\n";
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}
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_printer << "a=control:*\r\n";
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}
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string getSdp() const override {
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return _printer;
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}
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private:
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_StrPrinter _printer;
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};
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/**
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* h264类型sdp
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*/
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class H264Sdp : public Sdp {
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public:
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/**
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*
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* @param sps 264 sps,带0x00000001头
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* @param pps 264 pps,带0x00000001头
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* @param playload_type rtp playload type 默认96
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* @param bitrate 比特率
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*/
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H264Sdp(const string &sps,
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const string &pps,
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int playload_type = 96,
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int bitrate = 4000) : Sdp(90000,playload_type) {
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//视频通道
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_printer << "m=video 0 RTP/AVP " << playload_type << "\r\n";
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_printer << "b=AS:" << bitrate << "\r\n";
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_printer << "a=rtpmap:" << playload_type << " H264/" << 90000 << "\r\n";
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_printer << "a=fmtp:" << playload_type << " packetization-mode=1;profile-level-id=";
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char strTemp[100];
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int profile_level_id = 0;
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string strSPS = sps.substr(4);
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string strPPS = pps.substr(4);
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if (strSPS.length() >= 4) { // sanity check
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profile_level_id = (strSPS[1] << 16) | (strSPS[2] << 8) | strSPS[3]; // profile_idc|constraint_setN_flag|level_idc
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}
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memset(strTemp, 0, 100);
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sprintf(strTemp, "%06X", profile_level_id);
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_printer << strTemp;
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_printer << ";sprop-parameter-sets=";
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memset(strTemp, 0, 100);
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av_base64_encode(strTemp, 100, (uint8_t *) strSPS.data(), strSPS.size());
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_printer << strTemp << ",";
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memset(strTemp, 0, 100);
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av_base64_encode(strTemp, 100, (uint8_t *) strPPS.data(), strPPS.size());
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_printer << strTemp << "\r\n";
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_printer << "a=control:trackID=" << getTrackType() << "\r\n";
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}
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string getSdp() const override {
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return _printer;
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}
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TrackType getTrackType() const override {
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return TrackVideo;
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}
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CodecId getCodecId() const override {
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return CodecH264;
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}
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private:
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_StrPrinter _printer;
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};
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/**
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* aac类型SDP
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*/
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class AACSdp : public Sdp {
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public:
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/**
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*
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* @param aac_cfg aac两个字节的配置描述
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* @param sample_rate 音频采样率
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* @param playload_type rtp playload type 默认98
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* @param bitrate 比特率
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*/
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AACSdp(const string &aac_cfg,
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int sample_rate,
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int playload_type = 98,
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int bitrate = 128) : Sdp(sample_rate,playload_type){
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_printer << "m=audio 0 RTP/AVP " << playload_type << "\r\n";
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_printer << "b=AS:" << bitrate << "\r\n";
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_printer << "a=rtpmap:" << playload_type << " MPEG4-GENERIC/" << sample_rate << "\r\n";
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char configStr[32] = {0};
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snprintf(configStr, sizeof(configStr), "%02X%02x", aac_cfg[0], aac_cfg[1]);
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_printer << "a=fmtp:" << playload_type << " streamtype=5;profile-level-id=1;mode=AAC-hbr;"
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<< "sizelength=13;indexlength=3;indexdeltalength=3;config="
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<< configStr << "\r\n";
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_printer << "a=control:trackID=" << getTrackType() << "\r\n";
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}
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string getSdp() const override {
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return _printer;
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}
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TrackType getTrackType() const override {
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return TrackAudio;
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};
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CodecId getCodecId() const override {
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return CodecAAC;
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}
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private:
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_StrPrinter _printer;
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};
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/**
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* rtsp生成器
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*/
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class RtspEncoder : public FrameRingInterface , public RtpRingInterface{
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public:
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/**
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* 构成函数
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*/
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RtspEncoder(){
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_rtpRing = std::make_shared<RtpRingInterface::RingType>();
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_frameRing = std::make_shared<FrameRingInterface::RingType>();
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}
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virtual ~RtspEncoder(){}
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/**
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* 添加音视频track
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* @param sdp 媒体描述对象
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* @param ssrc 媒体rtp ssrc
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* @param mtu 媒体rtp mtu
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*/
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void addTrack(const Sdp::Ptr & sdp,uint32_t ssrc = 0,int mtu = 1400){
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if(ssrc == 0){
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ssrc = ((uint64_t) sdp.get()) & 0xFFFFFFFF;
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}
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sdp->createRtpEncoder(ssrc, mtu);
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sdp->setFrameRing(_frameRing);
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sdp->setRtpRing(_rtpRing);
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_sdp_map[sdp->getTrackType()] = sdp;
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}
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/**
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* 获取完整的SDP字符串
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* @return SDP字符串
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*/
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string getSdp() {
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_StrPrinter printer;
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for(auto &pr : _sdp_map){
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printer << pr.second->getSdp() ;
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}
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return printer;
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}
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/**
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* 写入帧数据然后打包rtp
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* @param frame 帧数据
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*/
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void inputFrame(const Frame::Ptr &frame) override {
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auto it = _sdp_map.find(frame->getTrackType());
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if(it == _sdp_map.end()){
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return ;
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}
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it->second->inputFrame(frame);
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}
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/**
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* 也可以在外部打包好rtp然后再写入
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* @param rtp rtp包
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* @param key_pos 是否为关键帧的第一个rtp包
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*/
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bool inputRtp(const RtpPacket::Ptr &rtp, bool key_pos = true) override {
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auto it = _sdp_map.find(rtp->getTrackType());
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if(it == _sdp_map.end()){
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return false;
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}
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return it->second->inputRtp(rtp,key_pos);
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}
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/**
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* 获取rtp环形缓存
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* @return
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*/
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RtpRingInterface::RingType::Ptr getRtpRing() const override{
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return _rtpRing;
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}
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/**
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* 获取帧环形缓存
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* @return
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*/
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FrameRingInterface::RingType::Ptr getFrameRing() const override{
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return _frameRing;
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}
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/**
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* 设置帧环形缓存
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* @param ring
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*/
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void setFrameRing(const FrameRingInterface::RingType::Ptr &ring) override{
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_frameRing = ring;
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for(auto &pr : _sdp_map){
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pr.second->setFrameRing(ring);
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}
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}
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/**
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* 设置rtp环形缓存
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* @param ring
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*/
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void setRtpRing(const RtpRingInterface::RingType::Ptr &ring) override{
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_rtpRing = ring;
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for(auto &pr : _sdp_map){
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pr.second->setRtpRing(ring);
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}
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}
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private:
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map<int,Sdp::Ptr> _sdp_map;
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RtpRingInterface::RingType::Ptr _rtpRing;
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FrameRingInterface::RingType::Ptr _frameRing;
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};
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}
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}
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#endif //ZLMEDIAKIT_RTSPMAKER_H
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