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ADM_tsAudio.cpp
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ADM_tsAudio.cpp
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/***************************************************************************
\file ADM_tsAudio.cpp
copyright : (C) 2006/2009 by mean
email : fixounet@free.fr
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "ADM_default.h"
#include "ADM_Video.h"
#include "ADM_aacinfo.h"
#include <string.h>
#include <math.h>
#include "ADM_ts.h"
#include "ADM_coreUtils.h"
#if 0
#define aprintf printf
#else
#define aprintf(...) {}
#endif
/**
\fn ADM_tsAccess
\param name [in] Name of the file to take audio from
\param pid [in] Pid of the audio track
\param append [in] Flag to auto append files
\param aacAdts[in] Set to true if the file is aac/adts
\param myLen/myExtra[in] ExtraData if any
*/
ADM_tsAccess::ADM_tsAccess(const char *name,uint32_t pid,int append,ADM_TS_MUX_TYPE muxing,int myLen,uint8_t *myExtra)
{
this->pid=pid;
if(!demuxer.open(name,append)) ADM_assert(0);
packet=new TS_PESpacket(pid);
this->muxing=muxing;
ADM_info("Creating audio track, pid=%x, muxing =%d\n",pid,muxing);
lastDts=ADM_NO_PTS;
wrapCount=0;
if(myLen && myExtra)
{
extraDataLen=myLen;
extraData=new uint8_t [myLen];
memcpy(extraData,myExtra,extraDataLen);
ADM_info("Creating ts audio access with %u bytes of extradata.",extraDataLen);
mixDump(extraData,extraDataLen);
}
}
/**
\fn ~ADM_tsAccess
*/
ADM_tsAccess::~ADM_tsAccess()
{
demuxer.close();
if(packet) delete packet;
packet=NULL;
if(extraData) delete [] extraData;
extraData=NULL;
}
/**
\fn push
\brief add a seek point.
*/
bool ADM_tsAccess::push(uint64_t at, uint64_t dts,uint32_t size)
{
ADM_mpgAudioSeekPoint s;
s.position=at;
s.dts=dts;
s.size=size;
seekPoints.push_back(s);
return true;
}
/**
\fn getLength
*/
uint32_t ADM_tsAccess::getLength(void)
{
if(seekPoints.size())
return (seekPoints[seekPoints.size()-1].size);
return 0;
}
/**
\fn getDurationInUs
\brief Rememember seekPoint.dts time is already scaled and in us
*/
uint64_t ADM_tsAccess::getDurationInUs(void)
{
if(!seekPoints.size()) return 0;
// Take last seek point; should be accurate enough
int offset=seekPoints.size()-1;
while(offset)
{
uint64_t dts=seekPoints[offset].dts;
if(dts==ADM_NO_PTS)
{
offset--;
continue;
}
return dts;
}
return 0; // ?
}
/**
\fn updateExtraData
\brief Re-extract extradata from audio stream at given position
*/
bool ADM_tsAccess::updateExtraData(uint64_t start)
{
int retries=20;
demuxer.setPos(start);
switch(muxing)
{
case ADM_TS_MUX_ADTS:
{
int insize=0;
int dummySize;
uint8_t *ptr=NULL;
while(retries)
{
if(false==demuxer.getNextPES(packet)) return false;
int avail=packet->payloadSize-packet->offset;
insize=avail;
ptr=packet->payload+packet->offset;
if(ADM_adts2aac::ADTS_OK==adts.convert2(insize,ptr,&dummySize,NULL))
{
uint32_t len=0;
uint8_t *data=NULL;
adts.getExtraData(&len,&data);
if(len!=2) return false;
if(extraDataLen!=len)
{
delete [] extraData;
extraData=new uint8_t[len];
extraDataLen=len;
}
memcpy(extraData,data,len);
ADM_info("AAC ADTS extradata:\n");
mixDump(extraData,extraDataLen);
adts.reset();
return true;
}
retries--;
}
}
break;
case ADM_TS_MUX_LATM:
{
uint64_t time=ADM_NO_PTS;
while(retries--)
{
if(false==demuxer.getNextPES(packet)) return false;
int avail=packet->payloadSize-packet->offset;
if(false==latm.pushData(avail,packet->payload+packet->offset))
return false;
ADM_latm2aac::LATM_STATE outcome=latm.convert(packet->pts);
if(outcome==ADM_latm2aac::LATM_ERROR)
continue;
if(outcome==ADM_latm2aac::LATM_MORE_DATA_NEEDED)
continue;
uint32_t len=0;
uint8_t *data=NULL;
if(latm.getExtraData(&len,&data) && len && data)
{
if(extraDataLen!=len)
{
delete [] extraData;
extraData=new uint8_t[len];
extraDataLen=len;
}
memcpy(extraData,data,len);
ADM_info("AAC LATM extradata:\n");
mixDump(extraData,extraDataLen);
latm.flush();
return true;
}
}
}
break;
default:
return true;
}
return false;
}
/**
\fn goToTime
\brief Rememember seekPoint.dts time is already scaled and in us
*/
bool ADM_tsAccess::goToTime(uint64_t timeUs)
{
latm.flush();
adts.reset();
if(!seekPoints.size())
return false;
if(timeUs<seekPoints[0].dts)
{
aprintf("[PsAudio] Requested %" PRIu32" tick before 1st seek point at :%" PRIu32"\n",(uint32_t)timeUs/1000,(uint32_t)seekPoints[0].dts/1000);
updateExtraData(seekPoints[0].position);
demuxer.setPos(seekPoints[0].position);
wrapCount=0;
lastDts=ADM_NO_PTS;
return true;
}
for(int i=1;i<seekPoints.size();i++)
{
if(seekPoints[i].dts >=timeUs )
{
aprintf("[PsAudio] Requested %" PRIu32" tick seeking to at :%" PRIu32" us (next is %" PRIu32"ms \n",(uint32_t)timeUs/1000,
(uint32_t)seekPoints[i-1].dts/1000,
(uint32_t)seekPoints[i].dts/1000);
updateExtraData(seekPoints[i-1].position);
demuxer.setPos(seekPoints[i-1].position);
uint64_t st=seekPoints[i-1].dts;
if(st!=ADM_NO_PTS)
{
st /= 100;
st *= 9; // now in ticks
st >>= 32;
wrapCount=(uint32_t)st;
}
lastDts=ADM_NO_PTS;
return true;
}
}
return false;
}
/**
\fn timeConvert
\brief Convert time in ticks raw from the stream to avidemux time in us starting from the beginning of the file
*/
uint64_t ADM_tsAccess::timeConvert(uint64_t x)
{
if(x==ADM_NO_PTS) return ADM_NO_PTS;
const uint64_t wrapLen=1LL<<32;
if(x<dtsOffset)
x+=wrapLen;
x-=dtsOffset;
if(lastDts!=ADM_NO_PTS)
{
if(lastDts>x && lastDts-x >= wrapLen/2)
wrapCount++;
if(wrapCount && x>lastDts && x-lastDts > wrapLen/2)
wrapCount--;
}
lastDts=x;
x+=wrapLen*wrapCount;
double f=x*100.;
f/=9.;
f+=0.49;
return (uint64_t)f;
}
/**
\fn getPacket
*/
bool ADM_tsAccess::getPacket(uint8_t *buffer, uint32_t *size, uint32_t maxSize,uint64_t *dts)
{
// If it is adts, ask ffmpeg to unwrap it...
switch(muxing)
{
case ADM_TS_MUX_ADTS:
{
int outsize=0;
*size=0;
bool gotPacket=false;
int insize=0;
uint8_t *ptr=NULL;
while(1)
{
// Manage several packet in packet
if(ADM_adts2aac::ADTS_OK==adts.convert2(insize,ptr,&outsize,buffer))
{
*size=outsize;
if(gotPacket)
*dts=timeConvert(packet->pts);
else
*dts=ADM_NO_PTS;
return true;
}
if(false==demuxer.getNextPES(packet)) return false;
int avail=packet->payloadSize-packet->offset;
if(avail>maxSize) ADM_assert(0);
insize=avail;
ptr=packet->payload+packet->offset;
gotPacket=true;
}
break;
}
case ADM_TS_MUX_NONE:
{
if(false==demuxer.getNextPES(packet)) return false;
int avail=packet->payloadSize-packet->offset;
if(avail>maxSize) ADM_assert(0);
*size=avail;
memcpy(buffer,packet->payload+packet->offset,avail);
*dts=timeConvert(packet->pts);
break;
}
case ADM_TS_MUX_LATM:
{
// Try to get one...
int retries=40; // arbitrary
bool gotPacket=false;
uint64_t time=ADM_NO_PTS;
while(latm.empty()) // fetch next LOAS frame, it will contain several frames
{
if(!retries)
{
ADM_error("Cannot get AAC packet from LATM\n");
return false;
}
if(gotPacket) time=packet->pts;
ADM_latm2aac::LATM_STATE outcome = latm.convert(time);
if(outcome != ADM_latm2aac::LATM_OK)
{
if(outcome == ADM_latm2aac::LATM_ERROR)
{
latm.flush();
ADM_warning("Error demuxing LATM frame, %d attempts remaining.\n",retries);
}
if(false==demuxer.getNextPES(packet)) return false;
int avail=packet->payloadSize-packet->offset;
if(avail>maxSize) ADM_assert(0);
gotPacket=true;
if(false==latm.pushData(avail,packet->payload+packet->offset))
latm.flush();
}
retries--;
}
uint64_t myPts;
latm.getData(&myPts,size,buffer,maxSize);
*dts=timeConvert(myPts);
break;
}
default:
ADM_assert(0);
}
if(*dts!=ADM_NO_PTS)
{
aprintf("[psAudio] getPacket dts = %" PRIu32" ms\n",(uint32_t)*dts/1000);
}
return true;
}
//EOF