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/*
* pes2ts.c: PES2TS remux
*
* See the README file for copyright information and how to reach the author.
*
*/
#include <vdr/tools.h>
#include <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include "tsworker.h"
#include "pes2ts.h"
cPES2TSRemux::cPES2TSRemux(int VPid, int APid):
cThread("[ffnetdev] PES2TS remux"),
m_OutputBuffer(new cRingBufferLinear(OUTPUTBUFSIZE, TS_SIZE * 2)),
m_InputBuffer(new cRingBufferLinear(INPUTBUFSIZE, IPACKS)),
m_Active(false),
m_PlayModeChanged(false)
{
vpid = VPid;
apid = APid;
m_InputBuffer->SetTimeouts(0, 1000); // IMPORTANT to avoid busy wait in threads main loop and thus a high CPU load
Start();
OutputLocked = false;
}
cPES2TSRemux::~cPES2TSRemux()
{
m_Active = false;
delete m_InputBuffer;
delete m_OutputBuffer;
}
void cPES2TSRemux::Action(void)
{
unsigned int i;
uchar acc=0; // continutiy counter for audio packets
uchar vcc=0; // continutiy counter for video packets
uchar *cc; // either cc=&vcc; or cc=&acc;
unsigned short pid=0;
unsigned int packetlen;
uchar ts[188];
uchar pes[IPACKS];
unsigned int minNeededPacketlen = 10; // needed for read packet len: 6 Should be enought ... but makes no sense
m_Active = true;
while (m_Active) {
int count=0;
// fprintf(stderr, "[ffnetdev] Remuxer: Inputbuffersize: %d, Outputbuffersize: %d\n",
// m_InputBuffer->Available(), m_OutputBuffer->Available());
if (m_PlayModeChanged)
{
cCondWait::SleepMs(1500);
m_PlayModeChanged = false;
}
if (m_InputBuffer->Available() < (int)IPACKS*10) {
cCondWait::SleepMs(5);
continue;
}
if (!cTSWorker::HaveStreamClient()) {
ClearOutput();
cCondWait::SleepMs(10);
continue;
}
InputMutex.Lock();
uchar *data = m_InputBuffer->Get(count);
if (data==NULL) {
InputMutex.Unlock();
cCondWait::SleepMs(3);
continue;
}
// fprintf(stderr, "[ffnetdev] count: %07d Free: %07d AvailO %07d AvailI: %07d\n", count, m_InputBuffer->Free(),
// m_OutputBuffer->Available(), m_InputBuffer->Available());
if ( count < (int)minNeededPacketlen ) {
fprintf(stderr, "[ffnetdev] Remuxer: not enought bytes for PacketLen-Analysis, have only: %d\n", count);
InputMutex.Unlock();
cCondWait::SleepMs(2);
continue;
}
//DEBUG
//fprintf(stderr, "Data ready to read: %d\n", count);
//for (i=0; i<20; i++)
// fprintf(stderr, "%02X ", data[i]);
// END DEBUG
// check for valid PES signature in PES header
if ( (data[0]==0x00) && (data[1]==0x00) && (data[2]==0x01) ) {
packetlen = ((data[4]<<8) | data[5]) + 6 ;
if ( packetlen>IPACKS) {
fprintf(stderr, "[ffnetdev] Remuxer: IPACKS changed? packet length was %d, maximum: %d\n"
"This should not happen! Please report!\n", packetlen, IPACKS);
}
if ( count < (int)packetlen) {
fprintf(stderr, "[ffnetdev] Remuxer: not enought bytes for whole packet, have only: %d but LenShoud be %d\n", count, packetlen);
InputMutex.Unlock();
cCondWait::SleepMs(1);
continue;
}
// check for valid stream id type: is it video or audio or unknown?
if ( (data[3]>=0xC0) && (data[3]<=0xDF) || data[3] == 0xBD ) {
pid=apid;
cc=&acc;
}
else {
if ( (data[3]>=0xE0) && (data[3]<=0xEF) ) {
pid=vpid;
cc=&vcc;
}
else {
fprintf(stderr, "[ffnetdev] Remuxer: Unknown stream id: neither video nor audio type.\n");
// throw away whole PES packet
m_InputBuffer->Del(packetlen);
InputMutex.Unlock();
continue;
}
}
memcpy( pes, data, packetlen);
// we are now finished with the PES packet, delete it from ring buffer
m_InputBuffer->Del(packetlen);
InputMutex.Unlock();
}
else {
// no valid PES signature was found, so delete this stuff from ring buffer
// normally we should always receive a whole PES packet, since VDR always gives us a whole packet and not less or more
// with each call in streamdevice.c (PlayVideo, PlayAudio)
fprintf(stderr, "[ffnetdev] Remuxer: No valid PES signature found. This should not happen.\n");
m_InputBuffer->Del(1); // Probably it is better to delete 1 byte only to get in sync again!?
InputMutex.Unlock();
continue;
}
int tspacketlen = ((int)packetlen/184) * 188 + ((packetlen % 184 > 0) ? 188 : 0);
while (m_OutputBuffer->Free() < tspacketlen) {
if (!m_Active)
continue;
cCondWait::SleepMs(10);
//fprintf(stderr, "[ffnetdev] Remuxer: sleep %d %d\n", m_OutputBuffer->Free(), tspacketlen);
}
LockOutput();
bool first = true;
//--------------------------------------divide PES packet into small TS packets-----------------------
for (i=0; i< packetlen/184; i++) {
ts[0] = 0x47; //SYNC Byte
if (first) ts[1] = 0x40; // Set PUSI or
else ts[1] = 0x00; // clear PUSI, TODO: PID (high) is missing
ts[2] = pid & 0xFF; // PID (low)
ts[3] = 0x10 | ((*cc)&0x0F); // No adaptation field, payload only, continuity counter
memcpy(ts + 4, pes + i * 184, 184);
++(*cc);
m_OutputBuffer->Put(ts, 188);
first = false;
}
uchar rest = packetlen % 184;
if (rest>0) {
ts[0] = 0x47; //SYNC Byte
if (first) ts[1] = 0x40; // Set PUSI or
else ts[1] = 0x00; // clear PUSI, TODO: PID (high) is missing
ts[2] = pid & 0xFF; // PID (low)
ts[3] = 0x30 | ((*cc)&0x0F); // adaptation field, payload, continuity counter
++(*cc);
ts[4] = 183-rest;
if (ts[4]>0) {
ts[5] = 0x00;
memset(ts + 6, 0xFF, ts[4] - 1);
}
memcpy(ts + 5 + ts[4], pes + i * 184, rest);
m_OutputBuffer->Put(ts, 188);
first = false;
}
UnlockOutput();
}
m_Active = false;
}
int cPES2TSRemux::Put(const uchar *Data, int Count)
{
InputMutex.Lock();
int result = m_InputBuffer->Put(Data, Count);
InputMutex.Unlock();
return ( result);
}
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