// fixupPTS is apparently called to get UI time information and such
int eMPEGStreamInformation::fixupPTS(const off_t &offset, pts_t &ts)
{
//eDebug("[eMPEGStreamInformation::fixupPTS] offset=%llu pts=%llu", offset, ts);
if (m_streamtime_accesspoints)
{
/*
* The access points are measured in stream time, rather than actual mpeg pts.
* Overrule the timestamp with the nearest access point pts.
*/
off_t nearestoffset = offset;
getPTS(nearestoffset, ts);
return 0;
}
if (m_timestamp_deltas.empty())
return -1;
std::multimap<pts_t, off_t>::const_iterator
l = m_pts_to_offset.upper_bound(ts - 60 * 90000),
u = m_pts_to_offset.upper_bound(ts + 60 * 90000),
nearest = m_pts_to_offset.end();
while (l != u)
{
if ((nearest == m_pts_to_offset.end()) || (llabs(l->first - ts) < llabs(nearest->first - ts)))
nearest = l;
++l;
}
if (nearest == m_pts_to_offset.end())
return 1;
ts -= getDelta(nearest->second);
return 0;
}
void eMPEGStreamInformation::fixupDiscontinuties()
{
m_timestamp_deltas.clear();
if (!m_access_points.size())
return;
// eDebug("Fixing discontinuities ...");
/* if we have no delta at the beginning, extrapolate it */
if ((m_access_points.find(0) == m_access_points.end()) && (m_access_points.size() > 1))
{
std::map<off_t,pts_t>::const_iterator second = m_access_points.begin();
std::map<off_t,pts_t>::const_iterator first = second++;
if (first->first < second->first) /* i.e., not equal or broken */
{
off_t diff = second->first - first->first;
pts_t tdiff = second->second - first->second;
tdiff *= first->first;
tdiff /= diff;
m_timestamp_deltas[0] = first->second - tdiff;
// eDebug("first delta is %08llx", first->second - tdiff);
}
}
if (m_timestamp_deltas.empty())
m_timestamp_deltas[m_access_points.begin()->first] = m_access_points.begin()->second;
pts_t currentDelta = m_timestamp_deltas.begin()->second, lastpts_t = 0;
for (std::map<off_t,pts_t>::const_iterator i(m_access_points.begin()); i != m_access_points.end(); ++i)
{
pts_t current = i->second - currentDelta;
pts_t diff = current - lastpts_t;
if (llabs(diff) > (90000*5)) // 5sec diff
{
// eDebug("%llx < %llx, have discont. new timestamp is %llx (diff is %llx)!", current, lastpts_t, i->second, diff);
currentDelta = i->second - lastpts_t; /* FIXME: should be the extrapolated new timestamp, based on the current rate */
// eDebug("current delta now %llx, making current to %llx", currentDelta, i->second - currentDelta);
m_timestamp_deltas[i->first] = currentDelta;
}
lastpts_t = i->second - currentDelta;
}
// eDebug("ok, found %d disconts.", m_timestamp_deltas.size());
#if 0
for (off_t x=0x25807E34ULL; x < 0x25B3CF70; x+= 100000)
{
off_t o = x;
pts_t p;
int r = getPTS(o, p);
eDebug("%08llx -> %08llx | %08llx, %d, %08llx %08llx", x, getDelta(x), getInterpolated(x), r, o, p);
}
#endif
}
