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/*
* File: recplayer.cpp
* Author: savop
*
* Created on 8. Juni 2009, 11:57
*/
#include <stdio.h>
#include <fcntl.h>
#include <vdr/recording.h>
#include <vdr/tools.h>
#include "recplayer.h"
cRecordingPlayer *cRecordingPlayer::newInstance(cRecording* Recording){
if(Recording->IsPesRecording()){
ERROR("Sorry, but only TS is supported, yet!");
return NULL;
}
cRecordingPlayer *Player = new cRecordingPlayer(Recording);
return Player;
}
cRecordingPlayer::~cRecordingPlayer() {
delete this->mOffsets;
}
cRecordingPlayer::cRecordingPlayer(cRecording *Recording) {
MESSAGE(VERBOSE_SDK, "Created Recplayer");
this->mFile = NULL;
this->mTotalLenght = 0;
this->mRecording = Recording;
this->mOffsets = new off_t[VDR_MAX_FILES_PER_RECORDING];
this->mOffset = 0;
this->mIndex = 1;
}
void cRecordingPlayer::open(UpnpOpenFileMode){
this->Scan();
}
void cRecordingPlayer::close(){
delete [] this->mOffsets;
if(this->mFile) fclose(this->mFile);
}
int cRecordingPlayer::write(char*, size_t){
ERROR("Writing not allowed on recordings");
return 0;
}
int cRecordingPlayer::read(char* buf, size_t buflen){
FILE *File;
off_t fileEndOffset = this->mOffsets[this->mIndex];
if(this->mOffset > fileEndOffset){
File = this->NextFile();
}
else {
File = this->GetFile();
}
// do not read more bytes than the actual file has
size_t bytesToRead = ((fileEndOffset - this->mOffset) < (off_t)buflen)? fileEndOffset - this->mOffset : buflen;
size_t bytesRead = fread((char*)buf, sizeof(char), bytesToRead, File);
this->mOffset += (off_t)bytesRead;
return (int)bytesRead;
}
int cRecordingPlayer::seek(off_t offset, int origin){
// Calculate the new offset
switch(origin){
case SEEK_CUR:
if(this->mOffset + offset > this->mTotalLenght){
ERROR("Can't read behind end of file!");
return -1;
}
this->mOffset += (off_t)offset;
break;
case SEEK_END:
if(offset > 0){
ERROR("Can't read behind end of file!");
return -1;
}
this->mOffset = this->mTotalLenght + offset;
break;
case SEEK_SET:
if(offset > this->mTotalLenght){
ERROR("Can't read behind end of file!");
return -1;
}
this->mOffset = (off_t)offset;
break;
default:
ERROR("Unknown seek mode (%d)!", origin);
return -1;
}
// Seek to the very first file;
this->SeekInFile(1,0);
off_t fileEndOffset = this->mOffsets[this->mIndex];
// Spin until the new offset is in range of a specific file
while(this->mOffset > (fileEndOffset = this->mOffsets[this->mIndex])){
// If its not possible to switch to next file, there was an error
if(!this->NextFile()){
ERROR("Offset %lld not in the range of a file!", offset);
return -1;
}
}
off_t relativeOffset =
this->mOffset - (this->mOffsets[this->mIndex-1])
? this->mOffsets[this->mIndex-1]
: 0;
if(!this->SeekInFile(this->mIndex, relativeOffset)){
ERROR("Cannot set offset!");
return -1;
}
return 0;
}
void cRecordingPlayer::Scan(){
MESSAGE(VERBOSE_RECORDS, "Scanning video files...");
// Reset the offsets
int i = 1;
while(this->mOffsets[i++]) this->mOffsets[i] = 0;
MESSAGE(VERBOSE_RECORDS, "Offsets reseted.");
i = 0;
FILE *File;
while((File = this->GetFile(i))){
if(VDR_MAX_FILES_PER_RECORDING < i+1){
ERROR("Maximum file offsets exceeded!");
break;
}
fseek(File, 0, SEEK_END);
off_t offset = ftell(File);
MESSAGE(VERBOSE_RECORDS, "File %d has its last offset at %lld", i, offset);
this->mOffsets[i+1] = this->mOffsets[i] + offset;
this->mTotalLenght = this->mOffsets[i+1];
i++;
}
}
FILE *cRecordingPlayer::GetFile(int Index){
// No Index given: set current index
if(Index == 0) Index = this->mIndex;
// Index not changed: return current file
if(this->mIndex == Index && this->mFile) return this->mFile;
// Index changed: close open file and open new file
if(this->mFile) fclose(this->mFile);
char *filename = new char[VDR_FILENAME_BUFSIZE];
snprintf(filename, VDR_FILENAME_BUFSIZE, VDR_RECORDFILE_PATTERN_TS, this->mRecording->FileName(), Index );
MESSAGE(VERBOSE_BUFFERS, "Filename: %s", filename);
this->mFile = NULL;
if(this->mFile = fopen(filename, "r")){
this->mIndex = Index;
return this->mFile;
}
return NULL;
}
FILE *cRecordingPlayer::NextFile(void){
return this->GetFile(this->mIndex++);
}
int cRecordingPlayer::SeekInFile(int Index, off_t Offset){
FILE *File = this->GetFile(Index);
fseek(File, Offset, SEEK_SET);
return ftell(File);
}
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