forked from Jo2003/vlc_record
/
qextm3uparser.cpp
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/
qextm3uparser.cpp
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/*------------------------------ Information ---------------------------*//**
*
* $HeadURL$
*
* @file qextm3uparser.cpp
*
* @author Jo2003
*
* @date 12.12.2013
*
* $Id$
*
*///------------------------- (c) 2013 by Jo2003 --------------------------
#include "qextm3uparser.h"
#include <QRegExp>
#include <QStringList>
//---------------------------------------------------------------------------
//
//! \brief constructs QExtM3uParser object
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param parent (QObject *) pointer to parent object
//
//! \return --
//---------------------------------------------------------------------------
QExtM3uParser::QExtM3uParser(QObject *parent) :
QObject(parent),_iMediaIndex(-1),_iMediaIdxUsed(-1),_iTrgDuration(-1)
{
}
//---------------------------------------------------------------------------
//
//! \brief destroys QExtM3uParser object
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param --
//
//! \return --
//---------------------------------------------------------------------------
QExtM3uParser::~QExtM3uParser()
{
}
//---------------------------------------------------------------------------
//
//! \brief check for playlist type
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param pl (QString&) ref. to playlist content
//
//! \return m3u::M3U_MASTER_PL -> master playlist;
//! m3u::M3U_MEDIA_PL -> media playlist
//! m3u::M3U_UNKWN_PL -> unknown playlist type
//---------------------------------------------------------------------------
m3u::t_type QExtM3uParser::plType(const QString &pl)
{
m3u::t_type trv = m3u::M3U_UNKWN_PL;
QStringList sl = pl.split(QRegExp("[\r\n]"), QString::SkipEmptyParts);
int iM3u = 0, iTok = 0;
// to find out which type of playlist this is we should look
// for all URIs there.
// If this file only contains of playlists it is a master playlist.
// If this file only contains media URIs it is a media playlist.
// Else it is an unknown list type.
for (int i = 0; i < sl.count(); i++)
{
// no tag, but URI ...
if (!isTag(sl.at(i)) && isURI(sl.at(i)))
{
// playlist extension in URI ... ?
if (sl.at(i).indexOf("m3u", 0, Qt::CaseInsensitive) > -1)
{
// count ...
iM3u ++;
}
else
{
// count ..
iTok ++;
}
}
}
// make the final check ...
if (iM3u && !iTok)
{
trv = m3u::M3U_MASTER_PL;
}
else if (!iM3u && iTok)
{
trv = m3u::M3U_MEDIA_PL;
}
return trv;
}
//---------------------------------------------------------------------------
//
//! \brief simple check for tag
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param line (QString&) ref. to one line from playlist
//
//! \return true -> is tag; false -> no tag
//---------------------------------------------------------------------------
bool QExtM3uParser::isTag(const QString& line)
{
// simply check if line starts with "#EXT" ...
if (line.indexOf("#EXT") == 0)
{
return true;
}
else
{
return false;
}
}
//---------------------------------------------------------------------------
//
//! \brief very simple check for URI
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param line (QString&) ref. to one line from playlist
//
//! \return true -> is URI; false -> no URI
//---------------------------------------------------------------------------
bool QExtM3uParser::isURI(const QString& line)
{
QString s = line.simplified();
// Maybe a bit to simple?
// We think if line is not empty not a comment and no tag, it's an URI ...
if ((s.length() > 0) && (s.at(0) != '#'))
{
return true;
}
else
{
return false;
}
}
//---------------------------------------------------------------------------
//
//! \brief get available streams from master playlist
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param pl (QString&) ref. to one line from playlist
//! \param sVec (m3u::StreamVector&) ref. to stream vector
//
//! \return 0 -> ok; -1 -> any error
//---------------------------------------------------------------------------
int QExtM3uParser::getStreams(const QString& pl, m3u::StreamVector& sVec)
{
int iRet = -1;
QRegExp rx;
m3u::t_Stream stream;
QStringList sl = pl.split(QRegExp("[\r\n]"), QString::SkipEmptyParts);
sVec.clear();
// can be handled on master playlist only ...
if (plType(pl) == m3u::M3U_MASTER_PL)
{
for (int i = 0; i < sl.count(); i++)
{
if (isTag(sl.at(i)))
{
// get stream info ...
if (sl.at(i).indexOf("#EXT-X-STREAM-INF") > -1)
{
rx.setPattern("PROGRAM-ID=([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
stream.iId = rx.cap(1).toInt();
}
rx.setPattern("RESOLUTION=([0-9]*)x([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
stream.szRes.setWidth(rx.cap(1).toInt());
stream.szRes.setHeight(rx.cap(2).toInt());
}
rx.setPattern("BANDWIDTH=([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
stream.iBandWidth = rx.cap(1).toInt();
}
}
// other tags not supported so far ...
}
else if(isURI(sl.at(i)))
{
// get url of media playlist ...
stream.sUri = completeUri(sl.at(i).simplified());
// add element to vector ...
sVec.append(stream);
// reset stream structure ...
stream.iBandWidth = -1;
stream.iId = -1;
stream.szRes = QSize();
stream.sUri = "";
}
}
}
if (!sVec.isEmpty())
{
iRet = 0;
}
return iRet;
}
//---------------------------------------------------------------------------
//
//! \brief get stream parts / tokens from media playlist
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param pl (QString&) ref. to one line from playlist
//! \param sTVec (m3u::StreamTokVector&) ref. to stream token vector
//
//! \return 0 -> ok; 1 -> playlist already handled; -1 -> any error
//---------------------------------------------------------------------------
int QExtM3uParser::getStreamToks(const QString& pl, m3u::StreamTokVector& sTVec)
{
int iRet = -1;
int iTokCount = 0;
QRegExp rx;
m3u::t_StreamTok stok;
QStringList sl = pl.split(QRegExp("[\r\n]"), QString::SkipEmptyParts);
// reset endlist tag ...
_bEndList = false;
sTVec.clear();
// can be handled on media playlist only ...
if (plType(pl) == m3u::M3U_MEDIA_PL)
{
for (int i = 0; i < sl.count(); i++)
{
if (isTag(sl.at(i)))
{
if (sl.at(i).contains("#EXT-X-MEDIA-SEQUENCE:"))
{
rx.setPattern("#EXT-X-MEDIA-SEQUENCE:([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
if (rx.cap(1).toInt() > _iMediaIndex)
{
_iMediaIndex = rx.cap(1).toInt();
if (_iMediaIdxUsed == -1)
{
_iMediaIdxUsed = _iMediaIndex;
}
}
else
{
// we already handled this playlist ...
iRet = 1;
break;
}
}
}
else if(sl.at(i).contains("#EXT-X-TARGETDURATION:"))
{
rx.setPattern("#EXT-X-TARGETDURATION:([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
_iTrgDuration = rx.cap(1).toInt();
}
}
else if(sl.at(i).contains("#EXTINF:"))
{
rx.setPattern("#EXTINF:([^,]*),");
if (rx.indexIn(sl.at(i)) > -1)
{
stok.iDuration = qRound(rx.cap(1).toFloat());
}
rx.setPattern("#EXTINF:.*,(.*)$");
if (rx.indexIn(sl.at(i)) > -1)
{
stok.sTitle = rx.cap(1);
}
}
else if(sl.at(i).contains("#EXT-X-BYTERANGE:"))
{
if (sl.at(i).indexOf('@') > -1)
{
// offset given ...
rx.setPattern("#EXT-X-BYTERANGE:([0-9]*)@([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
stok.iByteCount = rx.cap(1).toInt();
stok.iBOffset = rx.cap(2).toInt();
}
}
else
{
// without offset ...
rx.setPattern("#EXT-X-BYTERANGE:([0-9]*)");
if (rx.indexIn(sl.at(i)) > -1)
{
stok.iByteCount = rx.cap(1).toInt();
stok.iBOffset = 0;
}
}
}
else if(sl.at(i).contains("#EXT-X-ENDLIST"))
{
_bEndList = true;
}
// other tags not supported so far ...
}
else if(isURI(sl.at(i)))
{
iTokCount ++;
if ((_iMediaIndex + iTokCount) > _iMediaIdxUsed)
{
stok.sUri = completeUri(sl.at(i).simplified());
_iMediaIdxUsed ++;
sTVec.append(stok);
}
// reset stream structure ...
stok.iBOffset = -1;
stok.iByteCount = -1;
stok.iDuration = -1;
stok.sTitle = "";
stok.sUri = "";
}
}
}
if (!sTVec.isEmpty() && (iRet != 1))
{
iRet = 0;
}
return iRet;
}
//---------------------------------------------------------------------------
//
//! \brief reset duration and media index
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param --
//
//! \return --
//---------------------------------------------------------------------------
void QExtM3uParser::reset()
{
_iMediaIndex = -1;
_iMediaIdxUsed = -1;
_iTrgDuration = -1;
_sMasterUrl = "";
}
//---------------------------------------------------------------------------
//
//! \brief get media index
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param --
//
//! \return media index
//---------------------------------------------------------------------------
const int& QExtM3uParser::mediaIndex()
{
return _iMediaIndex;
}
//---------------------------------------------------------------------------
//
//! \brief get max. duration value
//
//! \author Jo2003
//! \date 12.12.2013
//
//! \param --
//
//! \return max. duration value
//---------------------------------------------------------------------------
const int& QExtM3uParser::targetDuration()
{
return _iTrgDuration;
}
//---------------------------------------------------------------------------
//
//! \brief set master url used in case of relative playlist pathes
//
//! \author Jo2003
//! \date 13.12.2013
//
//! \param s (const QString&) master url
//
//! \return --
//---------------------------------------------------------------------------
void QExtM3uParser::setMasterUrl(const QString &s)
{
int i = s.lastIndexOf("/");
// remove playlist part of URI ...
if (i > -1)
{
_sMasterUrl = s.left(i + 1); // include the slash ...
}
else
{
_sMasterUrl = s;
}
}
//---------------------------------------------------------------------------
//
//! \brief prepend absolute path to uri if needed
//
//! \author Jo2003
//! \date 16.12.2013
//
//! \param sIn (const QString&) master url
//
//! \return URI
//---------------------------------------------------------------------------
QString QExtM3uParser::completeUri(const QString& sIn)
{
// absolute or relative path ...
if (sIn.indexOf("://") > -1)
{
// absolute ...
return sIn;
}
else
{
// relative -> add first part ..
return _sMasterUrl + sIn;
}
}
//---------------------------------------------------------------------------
//
//! \brief end of list reached
//
//! \author Jo2003
//! \date 17.12.2013
//
//! \param --
//
//! \return true -> end reached; false -> not reached
//---------------------------------------------------------------------------
bool QExtM3uParser::endList()
{
return _bEndList;
}