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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 1.15 2005/08/14 10:53:28 kls Exp $
*/
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include "recorder.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
class cFileWriter : public cThread {
private:
cRemux *remux;
cFileName *fileName;
cIndexFile *index;
uchar pictureType;
int fileSize;
int recordFile;
time_t lastDiskSpaceCheck;
bool RunningLowOnDiskSpace(void);
bool NextFile(void);
protected:
virtual void Action(void);
public:
cFileWriter(const char *FileName, cRemux *Remux);
virtual ~cFileWriter();
};
cFileWriter::cFileWriter(const char *FileName, cRemux *Remux)
:cThread("file writer")
{
fileName = NULL;
remux = Remux;
index = NULL;
pictureType = NO_PICTURE;
fileSize = 0;
lastDiskSpaceCheck = time(NULL);
fileName = new cFileName(FileName, true);
recordFile = fileName->Open();
if (recordFile < 0)
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
}
cFileWriter::~cFileWriter()
{
Cancel(3);
delete index;
delete fileName;
}
bool cFileWriter::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 cFileWriter::NextFile(void)
{
if (recordFile >= 0 && pictureType == I_FRAME) { // every file shall start with an I_FRAME
if (fileSize > MEGABYTE(Setup.MaxVideoFileSize) || RunningLowOnDiskSpace()) {
recordFile = fileName->NextFile();
fileSize = 0;
}
}
return recordFile >= 0;
}
void cFileWriter::Action(void)
{
time_t t = time(NULL);
while (Running()) {
int Count;
uchar *p = remux->Get(Count, &pictureType);
if (p) {
if (!Running() && pictureType == I_FRAME) // finish the recording before the next 'I' frame
break;
if (NextFile()) {
if (index && pictureType != NO_PICTURE)
index->Write(pictureType, fileName->Number(), fileSize);
if (safe_write(recordFile, p, Count) < 0) {
LOG_ERROR_STR(fileName->Name());
break;
}
fileSize += Count;
remux->Del(Count);
}
else
break;
t = time(NULL);
}
else if (time(NULL) - t > MAXBROKENTIMEOUT) {
esyslog("ERROR: video data stream broken");
cThread::EmergencyExit(true);
t = time(NULL);
}
}
}
cRecorder::cRecorder(const char *FileName, int Ca, int Priority, int VPid, const int *APids, const int *DPids, const int *SPids)
:cReceiver(Ca, Priority, VPid, APids, Setup.UseDolbyDigital ? DPids : NULL, SPids)
,cThread("recording")
{
// Make sure the disk is up and running:
SpinUpDisk(FileName);
ringBuffer = new cRingBufferLinear(RECORDERBUFSIZE, TS_SIZE * 2, true, "Recorder");
ringBuffer->SetTimeouts(0, 100);
remux = new cRemux(VPid, APids, Setup.UseDolbyDigital ? DPids : NULL, SPids, true);
writer = new cFileWriter(FileName, remux);
}
cRecorder::~cRecorder()
{
Detach();
delete writer;
delete remux;
delete ringBuffer;
}
void cRecorder::Activate(bool On)
{
if (On) {
writer->Start();
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)
{
while (Running()) {
int r;
uchar *b = ringBuffer->Get(r);
if (b) {
int Count = remux->Put(b, r);
if (Count)
ringBuffer->Del(Count);
}
}
}
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