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/*
* File: livereceiver.cpp
* Author: savop
*
* Created on 4. Juni 2009, 13:28
*/
#include <vdr/thread.h>
#include <vdr/remux.h>
#include <vdr/device.h>
#include <vdr/channels.h>
#include <vdr/ringbuffer.h>
#include "livereceiver.h"
cLiveReceiver* cLiveReceiver::newInstance(cChannel* Channel, int Priority){
cDevice *Device = cDevice::GetDevice(Channel, Priority, true);
if(!Device){
ERROR("No matching device found to serve this channel!");
return NULL;
}
cLiveReceiver *Receiver = new cLiveReceiver(Channel, Device);
if(Receiver){
MESSAGE("Receiver for channel \"%s\" created successfully.", Channel->Name());
return Receiver;
}
else {
ERROR("Failed to create receiver!");
return NULL;
}
}
cLiveReceiver::cLiveReceiver(cChannel *Channel, cDevice *Device)
: cReceiver( Channel->GetChannelID(), 0, Channel->Vpid(), Channel->Apids(), Channel->Dpids(), Channel->Spids()),
mDevice(Device), mChannel(Channel){
this->mLiveBuffer = NULL;
this->mOutputBuffer = NULL;
this->mFrameDetector = NULL;
}
cLiveReceiver::~cLiveReceiver(void){
if(this->IsAttached())
this->Detach();
}
void cLiveReceiver::open(UpnpOpenFileMode){
this->mLiveBuffer = new cRingBufferLinear(RECEIVER_LIVEBUFFER_SIZE, RECEIVER_RINGBUFFER_MARGIN, true, "Live TV buffer");
this->mOutputBuffer = new cRingBufferLinear(RECEIVER_OUTPUTBUFFER_SIZE, RECEIVER_RINGBUFFER_MARGIN, true, "Streaming buffer");
this->mLiveBuffer->SetTimeouts(0, 100);
this->mOutputBuffer->SetTimeouts(0, 500);
this->mFrameDetector = new cFrameDetector(this->mChannel->Vpid(), this->mChannel->Vtype());
this->mPatPmtGenerator.SetChannel(this->mChannel);
this->mDevice->SwitchChannel(this->mChannel, false);
this->mDevice->AttachReceiver(this);
}
void cLiveReceiver::Activate(bool On){
if(On){
this->Start();
MESSAGE("Live receiver started.");
}
else {
if(this->Running()){
this->Cancel(2);
}
MESSAGE("Live receiver stopped");
}
}
void cLiveReceiver::Receive(uchar* Data, int Length){
if(this->Running()){
int bytesWrote = this->mLiveBuffer->Put(Data, Length);
if(bytesWrote != Length && this->Running()){
this->mLiveBuffer->ReportOverflow(Length - bytesWrote);
}
}
}
void cLiveReceiver::Action(void){
MESSAGE("Started buffering...");
while(this->Running()){
int bytesRead;
//MESSAGE("Buffer is filled with %d bytes", this->mLiveBuffer->Available());
uchar* bytes = this->mLiveBuffer->Get(bytesRead);
if(bytes){
int count = this->mFrameDetector->Analyze(bytes, bytesRead);
if(count){
//MESSAGE("%d bytes analyzed", count);
//MESSAGE("%2.2f FPS", this->mFrameDetector->FramesPerSecond());
if(!this->Running() && this->mFrameDetector->IndependentFrame())
break;
if(this->mFrameDetector->Synced()){
//MESSAGE("Frame detector synced to data stream");
if(this->mFrameDetector->IndependentFrame()){
this->mOutputBuffer->Put(this->mPatPmtGenerator.GetPat(), TS_SIZE);
int i = 0;
while(uchar* pmt = this->mPatPmtGenerator.GetPmt(i)){
this->mOutputBuffer->Put(pmt, TS_SIZE);
}
}
int bytesWrote = this->mOutputBuffer->Put(bytes, count);
if(bytesWrote != count){
this->mLiveBuffer->ReportOverflow(count - bytesWrote);
}
//MESSAGE("Wrote %d to output buffer", bytesWrote);
if(bytesWrote){
this->mLiveBuffer->Del(bytesWrote);
}
else {
cCondWait::SleepMs(100);
}
}
else {
ERROR("Cannot sync to stream");
}
}
}
}
MESSAGE("Receiver was detached from device");
}
int cLiveReceiver::read(char* buf, size_t buflen){
int bytesRead;
if(!this->IsAttached())
bytesRead = -1;
else {
while(!this->mOutputBuffer->Available()){
WARNING("No data, waiting...");
cCondWait::SleepMs(50);
if(!this->IsAttached()){
MESSAGE("Lost device...");
return 0;
}
}
uchar* buffer = this->mOutputBuffer->Get(bytesRead);
if(buffer){
if(buflen > (size_t)bytesRead){
memcpy(buf,(char*)buffer,bytesRead);
this->mOutputBuffer->Del(bytesRead);
}
else {
memcpy(buf,(char*)buffer,buflen);
this->mOutputBuffer->Del(buflen);
}
}
}
MESSAGE("Read %d bytes from live feed", bytesRead);
return bytesRead;
}
int cLiveReceiver::seek(off_t, int){
ERROR("Seeking not supported on broadcasts");
return 0;
}
int cLiveReceiver::write(char*, size_t){
ERROR("Writing not allowed on broadcasts");
return 0;
}
void cLiveReceiver::close(){
MESSAGE("Closing live receiver");
this->Detach();
delete this->mOutputBuffer; this->mOutputBuffer = NULL;
delete this->mLiveBuffer; this->mLiveBuffer = NULL;
this->mFrameDetector = NULL;
MESSAGE("Live receiver closed.");
}
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