mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-10-31 16:47:28 +08:00
349 lines
9.4 KiB
C++
349 lines
9.4 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef ZLMEDIAKIT_H265_H
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#define ZLMEDIAKIT_H265_H
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#include "Frame.h"
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#include "Track.h"
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#include "Util/base64.h"
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#include "H264.h"
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using namespace toolkit;
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#define H265_TYPE(v) (((uint8_t)(v) >> 1) & 0x3f)
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namespace mediakit {
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bool getHEVCInfo(const string &strVps, const string &strSps, int &iVideoWidth, int &iVideoHeight, float &iVideoFps);
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/**
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* 265帧类
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*/
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class H265Frame : public FrameImp {
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public:
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typedef std::shared_ptr<H265Frame> Ptr;
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typedef enum {
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NAL_TRAIL_N = 0,
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NAL_TRAIL_R = 1,
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NAL_TSA_N = 2,
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NAL_TSA_R = 3,
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NAL_STSA_N = 4,
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NAL_STSA_R = 5,
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NAL_RADL_N = 6,
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NAL_RADL_R = 7,
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NAL_RASL_N = 8,
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NAL_RASL_R = 9,
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NAL_BLA_W_LP = 16,
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NAL_BLA_W_RADL = 17,
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NAL_BLA_N_LP = 18,
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NAL_IDR_W_RADL = 19,
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NAL_IDR_N_LP = 20,
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NAL_CRA_NUT = 21,
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NAL_RSV_IRAP_VCL22 = 22,
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NAL_RSV_IRAP_VCL23 = 23,
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NAL_VPS = 32,
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NAL_SPS = 33,
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NAL_PPS = 34,
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NAL_AUD = 35,
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NAL_EOS_NUT = 36,
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NAL_EOB_NUT = 37,
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NAL_FD_NUT = 38,
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NAL_SEI_PREFIX = 39,
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NAL_SEI_SUFFIX = 40,
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} NaleType;
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H265Frame(){
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_codec_id = CodecH265;
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}
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bool keyFrame() const override {
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return isKeyFrame(H265_TYPE(_buffer[_prefix_size]));
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}
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bool configFrame() const override{
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switch(H265_TYPE(_buffer[_prefix_size])){
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case H265Frame::NAL_VPS:
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case H265Frame::NAL_SPS:
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case H265Frame::NAL_PPS : return true;
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default : return false;
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}
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}
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static bool isKeyFrame(int type) {
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return type >= NAL_BLA_W_LP && type <= NAL_RSV_IRAP_VCL23;
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}
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};
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class H265FrameNoCacheAble : public FrameFromPtr {
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public:
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typedef std::shared_ptr<H265FrameNoCacheAble> Ptr;
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H265FrameNoCacheAble(char *ptr, uint32_t size, uint32_t dts,uint32_t pts, int prefix_size = 4) {
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_ptr = ptr;
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_size = size;
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_dts = dts;
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_pts = pts;
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_prefix_size = prefix_size;
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_codec_id = CodecH265;
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}
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bool keyFrame() const override {
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return H265Frame::isKeyFrame(H265_TYPE(((uint8_t *) _ptr)[_prefix_size]));
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}
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bool configFrame() const override{
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switch(H265_TYPE(((uint8_t *) _ptr)[_prefix_size])){
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case H265Frame::NAL_VPS:
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case H265Frame::NAL_SPS:
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case H265Frame::NAL_PPS:return true;
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default:return false;
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}
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}
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};
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typedef FrameInternal<H265FrameNoCacheAble> H265FrameInternal;
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/**
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* 265视频通道
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*/
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class H265Track : public VideoTrack {
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public:
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typedef std::shared_ptr<H265Track> Ptr;
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/**
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* 不指定sps pps构造h265类型的媒体
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* 在随后的inputFrame中获取sps pps
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*/
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H265Track() {}
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/**
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* 构造h265类型的媒体
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* @param vps vps帧数据
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* @param sps sps帧数据
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* @param pps pps帧数据
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* @param vps_prefix_len 265头长度，可以为3个或4个字节，一般为0x00 00 00 01
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* @param sps_prefix_len 265头长度，可以为3个或4个字节，一般为0x00 00 00 01
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* @param pps_prefix_len 265头长度，可以为3个或4个字节，一般为0x00 00 00 01
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*/
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H265Track(const string &vps,const string &sps, const string &pps,int vps_prefix_len = 4, int sps_prefix_len = 4, int pps_prefix_len = 4) {
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_vps = vps.substr(vps_prefix_len);
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_sps = sps.substr(sps_prefix_len);
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_pps = pps.substr(pps_prefix_len);
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onReady();
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}
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/**
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* 返回不带0x00 00 00 01头的vps
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*/
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const string &getVps() const {
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return _vps;
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}
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/**
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* 返回不带0x00 00 00 01头的sps
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*/
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const string &getSps() const {
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return _sps;
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}
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/**
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* 返回不带0x00 00 00 01头的pps
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*/
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const string &getPps() const {
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return _pps;
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}
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CodecId getCodecId() const override {
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return CodecH265;
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}
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/**
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* 返回视频高度
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*/
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int getVideoHeight() const override{
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return _height ;
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}
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/**
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* 返回视频宽度
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*/
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int getVideoWidth() const override{
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return _width;
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}
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/**
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* 返回视频fps
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*/
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float getVideoFps() const override{
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return _fps;
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}
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bool ready() override {
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return !_vps.empty() && !_sps.empty() && !_pps.empty();
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}
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/**
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* 输入数据帧,并获取sps pps
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* @param frame 数据帧
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*/
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void inputFrame(const Frame::Ptr &frame) override{
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int type = H265_TYPE(*((uint8_t *)frame->data() + frame->prefixSize()));
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if(frame->configFrame() || type == H265Frame::NAL_SEI_PREFIX){
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splitH264(frame->data(), frame->size(), frame->prefixSize(), [&](const char *ptr, int len, int prefix){
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H265FrameInternal::Ptr sub_frame = std::make_shared<H265FrameInternal>(frame, (char*)ptr, len, prefix);
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inputFrame_l(sub_frame);
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});
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} else {
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inputFrame_l(frame);
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}
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}
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private:
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/**
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* 输入数据帧,并获取sps pps
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* @param frame 数据帧
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*/
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void inputFrame_l(const Frame::Ptr &frame) {
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int type = H265_TYPE(((uint8_t *) frame->data() + frame->prefixSize())[0]);
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if (H265Frame::isKeyFrame(type)) {
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insertConfigFrame(frame);
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VideoTrack::inputFrame(frame);
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_last_frame_is_idr = true;
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return;
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}
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_last_frame_is_idr = false;
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//非idr帧
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switch (type) {
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case H265Frame::NAL_VPS: {
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//vps
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_vps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
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}
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break;
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case H265Frame::NAL_SPS: {
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//sps
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_sps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
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}
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break;
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case H265Frame::NAL_PPS: {
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//pps
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_pps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
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}
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break;
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default: {
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//other frames
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VideoTrack::inputFrame(frame);
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}
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break;
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}
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}
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/**
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* 解析sps获取宽高fps
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*/
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void onReady(){
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getHEVCInfo(_vps, _sps, _width, _height, _fps);
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}
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Track::Ptr clone() override {
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return std::make_shared<std::remove_reference<decltype(*this)>::type>(*this);
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}
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//生成sdp
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Sdp::Ptr getSdp() override ;
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//在idr帧前插入vps sps pps帧
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void insertConfigFrame(const Frame::Ptr &frame){
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if(_last_frame_is_idr){
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return;
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}
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if(!_vps.empty()){
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auto vpsFrame = std::make_shared<H265Frame>();
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vpsFrame->_prefix_size = 4;
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vpsFrame->_buffer.assign("\x0\x0\x0\x1", 4);
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vpsFrame->_buffer.append(_vps);
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vpsFrame->_dts = frame->dts();
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VideoTrack::inputFrame(vpsFrame);
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}
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if (!_sps.empty()) {
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auto spsFrame = std::make_shared<H265Frame>();
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spsFrame->_prefix_size = 4;
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spsFrame->_buffer.assign("\x0\x0\x0\x1", 4);
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spsFrame->_buffer.append(_sps);
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spsFrame->_dts = frame->dts();
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VideoTrack::inputFrame(spsFrame);
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}
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if (!_pps.empty()) {
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auto ppsFrame = std::make_shared<H265Frame>();
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ppsFrame->_prefix_size = 4;
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ppsFrame->_buffer.assign("\x0\x0\x0\x1", 4);
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ppsFrame->_buffer.append(_pps);
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ppsFrame->_dts = frame->dts();
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VideoTrack::inputFrame(ppsFrame);
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}
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}
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private:
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string _vps;
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string _sps;
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string _pps;
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int _width = 0;
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int _height = 0;
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float _fps = 0;
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bool _last_frame_is_idr = false;
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};
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/**
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* h265类型sdp
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*/
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class H265Sdp : public Sdp {
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public:
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/**
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* 构造函数
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* @param sps 265 sps,不带0x00000001头
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* @param pps 265 pps,不带0x00000001头
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* @param payload_type rtp payload type 默认96
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* @param bitrate 比特率
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*/
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H265Sdp(const string &strVPS,
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const string &strSPS,
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const string &strPPS,
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int payload_type = 96,
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int bitrate = 4000) : Sdp(90000,payload_type) {
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//视频通道
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_printer << "m=video 0 RTP/AVP " << payload_type << "\r\n";
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_printer << "b=AS:" << bitrate << "\r\n";
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_printer << "a=rtpmap:" << payload_type << " H265/" << 90000 << "\r\n";
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_printer << "a=fmtp:" << payload_type << " ";
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_printer << "sprop-vps=";
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_printer << encodeBase64(strVPS) << "; ";
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_printer << "sprop-sps=";
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_printer << encodeBase64(strSPS) << "; ";
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_printer << "sprop-pps=";
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_printer << encodeBase64(strPPS) << "\r\n";
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_printer << "a=control:trackID=" << (int)TrackVideo << "\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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CodecId getCodecId() const override {
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return CodecH265;
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}
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private:
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_StrPrinter _printer;
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};
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}//namespace mediakit
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#endif //ZLMEDIAKIT_H265_H
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