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/*
* recorder.c: The actual DVB recorder
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: recorder.c 2.2 2009/01/23 16:44:29 kls Exp $
*/
#include "recorder.h"
#include "shutdown.h"
#define RECORDERBUFSIZE MEGABYTE(5)
// The maximum time we wait before assuming that a recorded video data stream
// is broken:
#define MAXBROKENTIMEOUT 30 // seconds
#define MINFREEDISKSPACE (512) // MB
#define DISKCHECKINTERVAL 100 // seconds
// --- cRecorder -------------------------------------------------------------
cRecorder::cRecorder(const char *FileName, tChannelID ChannelID, int Priority, int VPid, const int *APids, const int *DPids, const int *SPids)
:cReceiver(ChannelID, Priority, VPid, APids, Setup.UseDolbyDigital ? DPids : NULL, SPids)
,cThread("recording")
,recordingInfo(FileName)
{
// Make sure the disk is up and running:
SpinUpDisk(FileName);
ringBuffer = new cRingBufferLinear(RECORDERBUFSIZE, TS_SIZE * 2, true, "Recorder");
ringBuffer->SetTimeouts(0, 100);
cChannel *Channel = Channels.GetByChannelID(ChannelID);
int Pid = VPid;
int Type = Channel ? Channel->Vtype() : 0;
if (!Pid && APids) {
Pid = APids[0];
Type = 0x04;
}
if (!Pid && DPids) {
Pid = DPids[0];
Type = 0x06;
}
frameDetector = new cFrameDetector(Pid, Type);
patPmtGenerator.SetChannel(Channel);
fileName = NULL;
index = NULL;
fileSize = 0;
lastDiskSpaceCheck = time(NULL);
fileName = new cFileName(FileName, true);
recordFile = fileName->Open();
if (!recordFile)
return;
// Create the index file:
index = new cIndexFile(FileName, true);
if (!index)
esyslog("ERROR: can't allocate index");
// let's continue without index, so we'll at least have the recording
}
cRecorder::~cRecorder()
{
Detach();
delete index;
delete fileName;
delete frameDetector;
delete ringBuffer;
}
bool cRecorder::RunningLowOnDiskSpace(void)
{
if (time(NULL) > lastDiskSpaceCheck + DISKCHECKINTERVAL) {
int Free = FreeDiskSpaceMB(fileName->Name());
lastDiskSpaceCheck = time(NULL);
if (Free < MINFREEDISKSPACE) {
dsyslog("low disk space (%d MB, limit is %d MB)", Free, MINFREEDISKSPACE);
return true;
}
}
return false;
}
bool cRecorder::NextFile(void)
{
if (recordFile && frameDetector->IndependentFrame()) { // every file shall start with an independent frame
if (fileSize > MEGABYTE(off_t(Setup.MaxVideoFileSize)) || RunningLowOnDiskSpace()) {
recordFile = fileName->NextFile();
fileSize = 0;
}
}
return recordFile != NULL;
}
void cRecorder::Activate(bool On)
{
if (On)
Start();
else
Cancel(3);
}
void cRecorder::Receive(uchar *Data, int Length)
{
if (Running()) {
int p = ringBuffer->Put(Data, Length);
if (p != Length && Running())
ringBuffer->ReportOverflow(Length - p);
}
}
void cRecorder::Action(void)
{
time_t t = time(NULL);
bool Synced = false;
bool InfoWritten = false;
while (Running()) {
int r;
uchar *b = ringBuffer->Get(r);
if (b) {
int Count = frameDetector->Analyze(b, r);
if (Count) {
if (!Running() && frameDetector->IndependentFrame()) // finish the recording before the next independent frame
break;
if (Synced |= frameDetector->IndependentFrame()) { // start with first independent frame
if (!InfoWritten) {
if (recordingInfo.Read()) {
if (frameDetector->FramesPerSecond() > 0 && recordingInfo.FramesPerSecond() != frameDetector->FramesPerSecond()) {
recordingInfo.SetFramesPerSecond(frameDetector->FramesPerSecond());
recordingInfo.Write();
}
}
InfoWritten = true;
}
if (!NextFile())
break;
if (index && frameDetector->NewFrame())
index->Write(frameDetector->IndependentFrame(), fileName->Number(), fileSize);
if (frameDetector->IndependentFrame()) {
recordFile->Write(patPmtGenerator.GetPat(), TS_SIZE);
fileSize += TS_SIZE;
int Index = 0;
while (uchar *pmt = patPmtGenerator.GetPmt(Index)) {
recordFile->Write(pmt, TS_SIZE);
fileSize += TS_SIZE;
}
}
if (recordFile->Write(b, Count) < 0) {
LOG_ERROR_STR(fileName->Name());
break;
}
fileSize += Count;
t = time(NULL);
}
ringBuffer->Del(Count);
}
}
if (time(NULL) - t > MAXBROKENTIMEOUT) {
esyslog("ERROR: video data stream broken");
ShutdownHandler.RequestEmergencyExit();
t = time(NULL);
}
}
}
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