初始提交

2026-07-06 03:28:09 +08:00 · 2017-04-01 16:35:56 +08:00
parent aef0ecbcb9
commit 3f73024a9b
131 changed files with 18216 additions and 0 deletions
--- a/src/H264/H264Parser.cpp
+++ b/src/H264/H264Parser.cpp
@@ -0,0 +1,100 @@
+//
+//  H264Parser.cpp
+//  MediaPlayer
+//
+//  Created by xzl on 2017/1/16.
+//  Copyright © 2017年 jizan. All rights reserved.
+//
+
+#include "H264Parser.h"
+#include "Util/logger.h"
+using namespace ZL::Util;
+
+H264Parser::H264Parser(){
+    
+}
+H264Parser::~H264Parser(){
+    
+}
+void H264Parser::inputH264(const string &h264,uint32_t dts){
+    
+    m_parser.SetStream((const uint8_t *)h264.data(), h264.size());
+    while (true) {
+        if(media::H264Parser::kOk != m_parser.AdvanceToNextNALU(&m_nalu)){
+            break;
+        }
+        
+        switch (m_nalu.nal_unit_type) {
+            case media::H264NALU::kNonIDRSlice:
+            case media::H264NALU::kIDRSlice:{
+                if(media::H264Parser::kOk == m_parser.ParseSliceHeader(m_nalu, &m_shdr)){
+                    const media::H264SPS *pPps = m_parser.GetSPS(m_shdr.pic_parameter_set_id);
+                    if (pPps) {
+                        m_poc.ComputePicOrderCnt(pPps, m_shdr, &m_iNowPOC);
+                        computePts(dts);
+                    }
+                }
+            }
+                break;
+            case media::H264NALU::kSPS:{
+                int sps_id;
+                m_parser.ParseSPS(&sps_id);
+            }
+                break;
+            case media::H264NALU::kPPS:{
+                 int pps_id;
+                m_parser.ParsePPS(&pps_id);
+            }
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+void H264Parser::computePts(uint32_t iNowDTS) {
+	auto iPOCInc = m_iNowPOC - m_iLastPOC;
+	if (m_shdr.slice_type % 5 == 1) {
+		//这是B帧
+		m_iNowPTS = m_iLastPTS + m_iMsPerPOC * (iPOCInc);
+	} else {
+		//这是I帧或者P帧
+		m_iNowPTS = iNowDTS;
+		//计算每一POC的时间
+		if(iPOCInc == 0){
+			WarnL << "iPOCInc = 0," << m_iNowPOC << " " << m_iLastPOC;
+		}else{
+			m_iMsPerPOC = (m_iNowPTS - m_iLastPTS) / iPOCInc;
+		}
+		m_iLastPTS = m_iNowPTS;
+		m_iLastPOC = m_iNowPOC;
+	}
+
+    
+//	DebugL << m_shdr.slice_type
+//			<<"\r\nNOW:"
+//			<< m_iNowPOC << " "
+//			<< m_iNowPTS << " "
+//			<< iNowDTS << " "
+//			<< "\r\nLST:"
+//			<< m_iLastPOC << " "
+//			<< m_iLastPTS << " "
+//			<< m_iMsPerPOC << endl;
+
+}
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