C++实现H264文件解析_vc c++ 解码 h264 文件

• 此文件用于演示如何使用C++解析H264文件，便于刚入门音视频的朋友学习，建议参考协议学习！

//#include "stdafx.h"#include<iostream>#include<stdio.h>#include<tchar.h>#include<windows.h>typedefenum{
	NALU_TYPE_SLICE =1,
	NALU_TYPE_DPA =2,
	NALU_TYPE_DPB =3,
	NALU_TYPE_DPC =4,
	NALU_TYPE_IDR =5,
	NALU_TYPE_SEI =6,
	NALU_TYPE_SPS =7,
	NALU_TYPE_PPS =8,
	NALU_TYPE_AUD =9,
	NALU_TYPE_EOSEQ =10,
	NALU_TYPE_EOSTREAM =11,
	NALU_TYPE_FILL =12,} NaluType;typedefenum{
	NALU_PRIORITY_DISPOSABLE =0,
	NALU_PRIRITY_LOW =1,
	NALU_PRIORITY_HIGH =2,
	NALU_PRIORITY_HIGHEST =3} NaluPriority;voidprintfH264(int j,int i,int nLen,int nFrameType){printf("%d %d", j, i);int nForbiddenBit =(nFrameType >>7)&0x1;//第1位禁止位，值为1表示语法出错int nReference_idc =(nFrameType >>5)&0x03;//第2~3位为参考级别int nType = nFrameType &0x1f;//第4~8为是nal单元类型printf("  ");switch(nReference_idc){case NALU_PRIORITY_DISPOSABLE:printf("DISPOS");break;case NALU_PRIRITY_LOW:printf("LOW");break;case NALU_PRIORITY_HIGH:printf("HIGH");break;case NALU_PRIORITY_HIGHEST:printf("HIGHEST");break;}printf("  ");switch(nType){case NALU_TYPE_SLICE:printf("SLICE");break;case NALU_TYPE_DPA:printf("DPA");break;case NALU_TYPE_DPB:printf("DPB");break;case NALU_TYPE_DPC:printf("DPC");break;case NALU_TYPE_IDR:printf("IDR");break;case NALU_TYPE_SEI:printf("SEI");break;case NALU_TYPE_SPS:printf("SPS");break;case NALU_TYPE_PPS:printf("PPS");break;case NALU_TYPE_AUD:printf("AUD");break;case NALU_TYPE_EOSEQ:printf("EOSEQ");break;case NALU_TYPE_EOSTREAM:printf("EOSTREAM");break;case NALU_TYPE_FILL:printf("FILL");break;}printf("  %d\r\n", nLen);}intGetLen(int nPos,int nTotalSize, BYTE* btData){int nStart = nPos;while(nStart < nTotalSize){if(btData[nStart]==0x00&& btData[nStart +1]==0x00&& btData[nStart +2]==0x01){return nStart - nPos;}elseif(btData[nStart]==0x00&& btData[nStart +1]==0x00&& btData[nStart +2]==0x00&& btData[nStart +3]==0x01){return nStart - nPos;}else{
			nStart++;}}return nTotalSize - nPos;//最后一帧。}int_tmain(int argc, _TCHAR* argv[]){
	BYTE *btData =NULL;
	DWORD dwFileSize =0;
	HANDLE hFile =CreateFile(L"./sintel.h264", GENERIC_READ | GENERIC_WRITE,0,NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,NULL);if(hFile != INVALID_HANDLE_VALUE){
		dwFileSize =GetFileSize(hFile,NULL);//获取文件的大小
		btData =new BYTE[dwFileSize];//new一个文件大小的buffermemset(btData,0, dwFileSize);
		DWORD dwRead =0;ReadFile(hFile, btData, dwFileSize,&dwRead,NULL);//将文件中的数据读到创建的buffer中CloseHandle(hFile);}int j =0;//多少帧int i =0;//偏移量while(i < dwFileSize -4){if(btData[i]==0x00&& btData[i +1]==0x00&& btData[i +2]==0x01){int nLen =GetLen(i +3, dwFileSize, btData);printfH264(j, i, nLen, btData[i +3]);
			j++;
			i +=3;}elseif(btData[i]==0x00&& btData[i +1]==0x00&& btData[i +2]==0x00&& btData[i +3]==0x01){int nLen =GetLen(i +4, dwFileSize, btData);printfH264(j, i, nLen, btData[i +4]);
			j++;
			i +=4;}else{
			i++;}}if(btData){delete[] btData;}return0;}

演示结果：