demuxer.cpp
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/*******************************************************}
{ }
{ File: demuxer.cpp }
{ Created by Tsviatko Jongov }
{ http://tsviatko.jongov.com }
{ Date : 25.01.2007 }
{ }
{ CMpeg2Demux class. }
{ }
{*******************************************************/
#include "assert.h"
#include <stdio.h>
#include "demuxer.h"
#include "Pack_Header_Def.h"
#include "time.h"
#include <chrono>
#ifdef _WIN32
#include "Winsock2.h"
#pragma comment(lib, "ws2_32.lib")
#endif
#ifdef __linux__
#include "arpa/inet.h"
#endif
using namespace std;
static /*_inline*/ unsigned int asm_swap32(unsigned int x)
{
return ntohl(x);
}
static /*_inline*/ unsigned short asm_swap16(unsigned short x)
{
return ntohs(x);
}
CMpeg2Demux::CMpeg2Demux()
: m_streamType(STREAM_TYPE_UNKNOWN)
,m_userdata(NULL)
,m_userdata2(NULL)
,m_lastiskeyfram(false)
{
try
{
fBuffer = new CBuffer(1024 * 1024);
if (fBuffer == NULL)
{
}
m_lastpts = 0;
fReceiveFunction = 0;
fReceiveFunction2 = 0;
m_psvideo= new CBuffer(1024*50);
m_esvideo= new CBuffer(1024*50);
m_psaudio= new CBuffer(1024*50);
m_esaudio= new CBuffer(1024*50);
}
catch (...)
{
}
};
CMpeg2Demux::~CMpeg2Demux()
{
try
{
if (fBuffer != NULL)
{
delete fBuffer;
fBuffer = NULL;
}
if (NULL != m_psvideo)
{
delete m_psvideo;
m_psvideo = NULL;
}
if (NULL != m_esvideo)
{
delete m_esvideo;
m_esvideo = NULL;
}
if (NULL != m_psaudio)
{
delete m_psaudio;
m_psaudio = NULL;
}
if (NULL != m_esaudio)
{
delete m_esaudio;
m_esaudio = NULL;
}
}
catch (...)
{
}
};
int CMpeg2Demux::AddData(void * Data, int Size/*, DWORD pts*/)
{
try
{
if ((Data == NULL) || (Size <= 0))
{
return (-1);
}
/*m_timeStamp = pts;*/
fBuffer->add((char *)Data, Size);
if (!Demultiplex())
{
return (-1);
}
return (0);
}
catch (...)
{
return (-1);
}
}
void CMpeg2Demux::SetReceiveFunction(ReceiveFunction * func, void* userdata)
{
try
{
fReceiveFunction = func;
m_userdata = userdata;
}
catch (...)
{
}
}
void CMpeg2Demux::SetReceiveFunction2(ReceiveFunction2 * func2, void* userdata2)
{
fReceiveFunction2 = func2;
m_userdata2 = userdata2;
}
uint64_t GetLocalTimeOfMicroSecond()
{
chrono::time_point<chrono::system_clock, chrono::microseconds> tpMicro
= chrono::time_point_cast<chrono::microseconds>(chrono::system_clock::now());
return tpMicro.time_since_epoch().count();
}
int CMpeg2Demux::Demultiplex()
{
try
{
unsigned char * PDW {};
unsigned int Code {};
int Processed = 0;
int StreamID {};
int PES_packet_length {};
int PES_header_data_length {};
int Val {};
if (fBuffer->len() <= 0)
{
return (0);
}
PDW = (unsigned char *)fBuffer->head();
while (fBuffer->len() - Processed > 140)
{
if ((*(unsigned int *)PDW & 0x00FFFFFF) != 0x00010000)
{
PDW++;
Processed++;
continue;
}
Code = asm_swap32(*(unsigned int *)PDW);
StreamID = (Code & 0xFF);
if (PACK_START_CODE != Code)
{
unsigned short pespacklen = asm_swap16(*(unsigned short *)(PDW + 4)) + 6;
if (fBuffer->len() - Processed < pespacklen + 6)
{
break;
}
}
if (PACK_START_CODE == Code)//前一个pspack完或下一个pspack开始
{
if (fReceiveFunction != NULL && m_esvideo->len())//视频es
{
PS_HEADER_tag* pshead = (PS_HEADER_tag*)m_psvideo->head();
uint64_t pts = 0;
pshead->getSystem_clock_reference_base(pts);
pts = pts/90;
int64_t localPts = GetLocalTimeOfMicroSecond();
fReceiveFunction(m_streamType, m_esvideo->head(), m_esvideo->len(), pts, localPts, m_lastiskeyfram, m_userdata);
}
m_esvideo->fFirst = m_esvideo->len();
m_esvideo->compact();
if (fReceiveFunction != NULL && m_esaudio->len())//音频es
{
int64_t localPts = GetLocalTimeOfMicroSecond();
fReceiveFunction(0xC0, m_esaudio->head(), m_esaudio->len(), m_lastpts, localPts, 0, m_userdata);
}
m_esaudio->fFirst = m_esaudio->len();
m_esaudio->compact();
if (fReceiveFunction2 != NULL && m_psvideo->len())//视频ps
{
fReceiveFunction2(STREAM_TYPE_VIDEO,m_psvideo->head(),m_psvideo->len(),m_lastpts,m_lastiskeyfram,m_userdata2);
}
m_psvideo->fFirst = m_psvideo->len();
m_psvideo->compact();
if (fReceiveFunction2 != NULL && m_psaudio->len())//音频
{
fReceiveFunction2(STREAM_TYPE_AUDIO,m_psaudio->head(),m_psaudio->len(),m_lastpts,0,m_userdata2);
}
m_psaudio->fFirst = m_psaudio->len();
m_psaudio->compact();
PS_HEADER_tag* ppshead = (PS_HEADER_tag*)PDW;
unsigned long psheadlen = sizeof(PS_HEADER_tag) + ppshead->pack_stuffing_length;
if (fBuffer->len() - Processed < (int)psheadlen)
{
break;
}
//
m_lastiskeyfram = false;
if ((*(unsigned int *)(PDW+psheadlen)&0x00FFFFFF) != 0x00010000)
{
}
else
{
m_psvideo->add((char*)PDW,psheadlen);//ps头写入视频数据中
PDW += psheadlen;
Processed += psheadlen;
continue;
}
}
else if (SYSTEM_START_CODE == Code)//system_header
{
unsigned short pespacklen = asm_swap16(*(unsigned short *)(PDW + 4)) + 6;
if ((*(unsigned int *)(PDW+pespacklen)&0x00FFFFFF) != 0x00010000)
{
printf("SYSTEM_START_CODE: Warning in CMpeg2Demux::Demultiplex - ((*PDW & 0x00FFFFFF) != 0x00010000).\n");
}
else
{
m_psvideo->add((char*)PDW,pespacklen);//ps头写入视频数据中
PDW += pespacklen;
Processed +=pespacklen;
m_lastiskeyfram = true;
continue;
}
}
else if (PROGRAM_STREAM_MAP == StreamID)//psm
{
unsigned short pespacklen = asm_swap16(*(unsigned short *)(PDW + 4)) + 6;
if ((*(unsigned int *)(PDW+pespacklen)&0x00FFFFFF) != 0x00010000)
{
}
else
{
unsigned short program_stream_info_length;
//unsigned short elementary_stream_map_length;
unsigned short* plen = (unsigned short*)(PDW + 8);
program_stream_info_length = ntohs(*plen);
int test = *(PDW + 8 + program_stream_info_length + 5);//192
//assert(*(PDW+8+program_stream_info_length+5) == 0xe0);
//if(*(PDW + 8 + program_stream_info_length + 5) != 0xe0)
//{
// continue;
//}
//printf("0xe0=%d, 0x1b=%d\n", *(PDW + 8 + program_stream_info_length + 5), *(PDW + 8 + program_stream_info_length + 4));
if (m_pserror > 5 && (*(PDW + 8 + program_stream_info_length + 5) != 0xe0 && *(PDW + 8 + program_stream_info_length + 5) != 0xc0))//判断c0是为了兼容枢纽引擎名叫博士的垃圾小厂家
{
printf("--------------------------------2 error:{%d}\n", m_pserror);
return -1;
}
if (*(PDW + 8 + program_stream_info_length + 5) != 0xe0 && *(PDW + 8 + program_stream_info_length + 5) != 0xc0)
{
//printf("--------------------------------1\n");
++m_pserror;
continue;
}
m_lastiskeyfram = true;
if (*(PDW + 8 + program_stream_info_length + 4) == 0x1b || *(PDW + 8 + program_stream_info_length + 4) == 0x03)
{
m_streamType = VIDEO_TYPE_H264; // H264
}
else if (*(PDW + 8 + program_stream_info_length + 4) == 0x24)
{
m_streamType = VIDEO_TYPE_H265; // H265
}
else if (*(PDW+8+program_stream_info_length+4) == 0x10)
{
m_streamType = VIDEO_TYPE_MPEG4; // MPEG4
}
else
{
m_streamType = STREAM_TYPE_UNKNOWN;
}
m_pserror = 0;
m_psvideo->add((char*)PDW,pespacklen);//ps头写入视频数据中
PDW += pespacklen;
Processed +=pespacklen;
continue;
}
}
else if (0xBD == StreamID)//私有数据
{
unsigned short pespacklen = asm_swap16(*(unsigned short *)(PDW + 4)) + 6;
if ((*(unsigned int *)(PDW+pespacklen)&0x00FFFFFF) != 0x00010000)
{
}
else
{
m_psvideo->add((char*)PDW,pespacklen);//ps头写入视频数据中
PDW += pespacklen;
Processed +=pespacklen;
continue;
}
}
if ((Code >= SYSTEM_START_CODE_MIN) &&
(Code <= SYSTEM_START_CODE_MAX) &&
(Code != PACK_START_CODE) &&
(Code != SYSTEM_START_CODE) &&
(StreamID != PROGRAM_STREAM_MAP) &&
(StreamID != PADDING_STREAM) &&
(StreamID != PRIVATE_STREAM_2) &&
(StreamID != ECM_STREAM) &&
(StreamID != EMM_STREAM) &&
(StreamID != PROGRAM_STREAM_DIRECTORY) &&
(StreamID != DSM_CC_STREAM) &&
(StreamID != ITU_T_STREAM_E))
{
PES_packet_length = asm_swap16(*(unsigned short *)(PDW + 4));
PES_header_data_length = *(PDW + 8);
if (PES_packet_length == 0)
PES_packet_length = fBuffer->len() - Processed/* - 4*/;
else
PES_packet_length += 6;
if (fBuffer->len() - Processed >= PES_packet_length/* + 4*/)
{
PES_HEADER_tag* peshead = (PES_HEADER_tag*)PDW;
uint64_t pts = 0;
if (peshead->PTS_DTS_flags&0x3)
{
PTS_tag* ptstag = (PTS_tag*)(PDW + 9);
ptstag->getPTS(pts);
m_lastpts = pts/90;
}
Val = 6 + 3 + PES_header_data_length;
if (0xE0 == StreamID)
{
m_esvideo->add((char*)PDW + Val, PES_packet_length - Val);
m_psvideo->add((char*)PDW, PES_packet_length);
}
else if (0xC0 == StreamID)
{
if (PES_packet_length + 6 - Val > 0)
{
m_esaudio->add((char*)PDW + Val,PES_packet_length - Val);
}
else
{
m_esaudio->add((char*)PDW + Val,PES_packet_length - 19);
}
m_psaudio->add((char*)PDW,PES_packet_length+6);
}
fBuffer->fFirst += Processed + PES_packet_length;
fBuffer->compact();
Processed = 0;
PDW = (unsigned char *)fBuffer->head();
}
else
{
break;
}
}
else {
PDW++;
Processed++;
}
};
if (Processed)
{
fBuffer->fFirst += Processed;
fBuffer->compact();
Processed = 0;
}
return (true);
}
catch (...)
{
return (-1);
}
}