mirror of
https://gitee.com/xia-chu/ZLMediaKit.git
synced 2026-05-07 03:17:49 +08:00
120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/*
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* MIT License
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*
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* Copyright (c) 2016 xiongziliang <771730766@qq.com>
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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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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "H264Parser.h"
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#include "Util/logger.h"
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using namespace ZL::Util;
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H264Parser::H264Parser(){
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}
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H264Parser::~H264Parser(){
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}
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void H264Parser::inputH264(const string &h264,uint32_t dts){
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m_parser.SetStream((const uint8_t *)h264.data(), h264.size());
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while (true) {
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if(media::H264Parser::kOk != m_parser.AdvanceToNextNALU(&m_nalu)){
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break;
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}
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switch (m_nalu.nal_unit_type) {
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case media::H264NALU::kNonIDRSlice:
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case media::H264NALU::kIDRSlice:{
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if(media::H264Parser::kOk == m_parser.ParseSliceHeader(m_nalu, &m_shdr)){
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const media::H264SPS *pPps = m_parser.GetSPS(m_shdr.pic_parameter_set_id);
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if (pPps) {
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m_poc.ComputePicOrderCnt(pPps, m_shdr, &m_iNowPOC);
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computePts(dts);
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}
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}
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}
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break;
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case media::H264NALU::kSPS:{
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int sps_id;
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m_parser.ParseSPS(&sps_id);
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}
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break;
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case media::H264NALU::kPPS:{
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int pps_id;
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m_parser.ParsePPS(&pps_id);
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}
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break;
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default:
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break;
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}
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}
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}
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void H264Parser::computePts(uint32_t iNowDTS) {
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auto iPOCInc = m_iNowPOC - m_iLastPOC;
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if (m_shdr.slice_type % 5 == 1) {
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//这是B帧
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m_iNowPTS = m_iLastPTS + m_iMsPerPOC * (iPOCInc);
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} else {
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//这是I帧或者P帧
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m_iNowPTS = iNowDTS;
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//计算每一POC的时间
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if(iPOCInc == 0){
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WarnL << "iPOCInc = 0," << m_iNowPOC << " " << m_iLastPOC;
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}else{
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m_iMsPerPOC = (m_iNowPTS - m_iLastPTS) / iPOCInc;
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}
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m_iLastPTS = m_iNowPTS;
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m_iLastPOC = m_iNowPOC;
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}
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// DebugL << m_shdr.slice_type
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// <<"\r\nNOW:"
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// << m_iNowPOC << " "
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// << m_iNowPTS << " "
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// << iNowDTS << " "
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// << "\r\nLST:"
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// << m_iLastPOC << " "
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// << m_iLastPTS << " "
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// << m_iMsPerPOC << endl;
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}
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