a little bit more error checking

diff --git a/lib/dvb/tstools.cpp b/lib/dvb/tstools.cpp
index c7d9a41..bd36308 100644 (file)
--- a/lib/dvb/tstools.cpp
+++ b/lib/dvb/tstools.cpp
@@ -91,7 +91,7 @@ int eDVBTSTools::getPTS(off_t &offset, pts_t &pts, int fixed)
                if (!m_streaminfo.getPTS(offset, pts))
                        return 0;
        
-       if (!m_source->valid())
+       if (!m_source || !m_source->valid())
                return -1;
 
        offset -= offset % 188;
@@ -411,7 +411,7 @@ int eDVBTSTools::getNextAccessPoint(pts_t &ts, const pts_t &start, int direction
 
 void eDVBTSTools::calcBegin()
 {
-       if (!m_source->valid())
+       if (!m_source || !m_source->valid())
                return;
 
        if (!(m_begin_valid || m_futile))
@@ -426,7 +426,7 @@ void eDVBTSTools::calcBegin()
 
 void eDVBTSTools::calcEnd()
 {
-       if (!m_source->valid())
+       if (!m_source || !m_source->valid())
                return;
 
        off_t end = m_source->lseek(0, SEEK_END);
@@ -579,7 +579,7 @@ int eDVBTSTools::takeSample(off_t off, pts_t &p)
 int eDVBTSTools::findPMT(int &pmt_pid, int &service_id)
 {
                /* FIXME: this will be factored out soon! */
-       if (!m_source->valid())
+       if (!m_source || !m_source->valid())
        {
                eDebug(" file not valid");
                return -1;