if (!f)
return -1;
m_access_points.clear();
+ m_pts_to_offset.clear();
while (1)
{
unsigned long long d[2];
d[1] = bswap_64(d[1]);
#endif
m_access_points[d[0]] = d[1];
+ m_pts_to_offset.insert(std::pair<pts_t,off_t>(d[1], d[0]));
}
fclose(f);
fixupDiscontinuties();
if (!m_access_points.size())
return;
- eDebug("Fixing discontinuities ...");
+// 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))
tdiff *= first->first;
tdiff /= diff;
m_timestamp_deltas[0] = first->second - tdiff;
- eDebug("first delta is %08llx", first->second - tdiff);
+// eDebug("first delta is %08llx", first->second - tdiff);
}
}
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);
+// 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);
+// 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());
+// eDebug("ok, found %d disconts.", m_timestamp_deltas.size());
#if 0
for (off_t x=0x25807E34ULL; x < 0x25B3CF70; x+= 100000)
/* i can be the first when you query for something before the first PTS */
if (i != m_timestamp_deltas.begin())
--i;
-
+
return i->second;
}
if (!m_timestamp_deltas.size())
return -1;
- std::map<off_t, pts_t>::const_iterator i = m_access_points.upper_bound(offset - 4 * 1024 * 1024), nearest = m_access_points.end();
-
- while (i != m_access_points.end())
+ 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_access_points.end()) || (llabs(i->second - ts) < llabs(nearest->second - ts)))
- nearest = i;
- ++i;
+ if ((nearest == m_pts_to_offset.end()) || (llabs(l->first - ts) < llabs(nearest->first - ts)))
+ nearest = l;
+ ++l;
}
- if (nearest == m_access_points.end())
- return -1;
- ts -= getDelta(nearest->first);
+ if (nearest == m_pts_to_offset.end())
+ return 1;
+
+ ts -= getDelta(nearest->second);
+
return 0;
}
int eMPEGStreamInformation::getPTS(off_t &offset, pts_t &pts)
{
std::map<off_t,pts_t>::iterator before = m_access_points.lower_bound(offset);
-
+
/* usually, we prefer the AP before the given offset. however if there is none, we take any. */
if (before != m_access_points.begin())
--before;
{
/* get the PTS values before and after the offset. */
std::map<off_t,pts_t>::iterator before, after;
-
after = m_access_points.upper_bound(offset);
before = after;
return before_ts + diff;
}
-off_t eMPEGStreamInformation::getAccessPoint(pts_t ts)
+off_t eMPEGStreamInformation::getAccessPoint(pts_t ts, int marg)
{
/* FIXME: more efficient implementation */
- pts_t delta = 0;
off_t last = 0;
+ off_t last2 = 0;
+ pts_t lastc = 0;
for (std::map<off_t, pts_t>::const_iterator i(m_access_points.begin()); i != m_access_points.end(); ++i)
{
- std::map<off_t, pts_t>::const_iterator d = m_timestamp_deltas.find(i->first);
- if (d != m_timestamp_deltas.end())
- delta = d->second;
+ pts_t delta = getDelta(i->first);
pts_t c = i->second - delta;
- if (c > ts)
- break;
+ if (c > ts) {
+ if (marg > 0)
+ return (last + i->first)/376*188;
+ else if (marg < 0)
+ return (last + last2)/376*188;
+ else
+ return last;
+ }
+ lastc = c;
+ last2 = last;
last = i->first;
}
- return last;
+ if (marg < 0)
+ return (last + last2)/376*188;
+ else
+ return last;
+}
+
+int eMPEGStreamInformation::getNextAccessPoint(pts_t &ts, const pts_t &start, int direction)
+{
+ off_t offset = getAccessPoint(start);
+ pts_t c1, c2;
+ std::map<off_t, pts_t>::const_iterator i = m_access_points.find(offset);
+ if (i == m_access_points.end())
+ {
+ eDebug("getNextAccessPoint: initial AP not found");
+ return -1;
+ }
+ c1 = i->second - getDelta(i->first);
+ while (direction)
+ {
+ if (direction > 0)
+ {
+ if (i == m_access_points.end())
+ return -1;
+ ++i;
+ c2 = i->second - getDelta(i->first);
+ if (c1 == c2) { // Discontinuity
+ ++i;
+ c2 = i->second - getDelta(i->first);
+ }
+ c1 = c2;
+ direction--;
+ }
+ if (direction < 0)
+ {
+ if (i == m_access_points.begin())
+ {
+ eDebug("at start");
+ return -1;
+ }
+ --i;
+ c2 = i->second - getDelta(i->first);
+ if (c1 == c2) { // Discontinuity
+ --i;
+ c2 = i->second - getDelta(i->first);
+ }
+ c1 = c2;
+ direction++;
+ }
+ }
+ ts = i->second - getDelta(i->first);
+ eDebug("fine, at %llx - %llx = %llx", ts, i->second, getDelta(i->first));
+ eDebug("fine, at %lld - %lld = %lld", ts, i->second, getDelta(i->first));
+ return 0;
}
eMPEGStreamParserTS::eMPEGStreamParserTS(eMPEGStreamInformation &streaminfo): m_streaminfo(streaminfo), m_pktptr(0), m_pid(-1), m_need_next_packet(0), m_skip(0)
/* advance to payload */
pkt += pkt[8] + 9;
-
+
+ /* sometimes, there are zeros before the startcode. */
+ while (pkt < (end-4))
+ if (pkt[0] || pkt[1] || pkt[2])
+ break;
+ else
+ pkt++;
+
/* if startcode found */
+// eDebug("%02x %02x %02x %02x", pkt[0], pkt[1], pkt[2], pkt[3]);
if (!(pkt[0] || pkt[1] || (pkt[2] != 1)))
{
if (pkt[3] == 0xb3) /* sequence header */
if (ptsvalid)
{
m_streaminfo.m_access_points[offset] = pts;
- eDebug("Sequence header at %llx, pts %llx", offset, pts);
+// eDebug("Sequence header at %llx, pts %llx", offset, pts);
+ } else
+ /*eDebug("Sequence header but no valid PTS value.")*/;
+ }
+
+ if (pkt[3] == 0x09 && /* MPEG4 AVC unit access delimiter */
+ (pkt[4] >> 5) == 0) /* and I-frame */
+ {
+ if (ptsvalid)
+ {
+ m_streaminfo.m_access_points[offset] = pts;
+// eDebug("MPEG4 AVC UAD at %llx, pts %llx", offset, pts);
} else
- eDebug("Sequence header but no valid PTS value.");
+ /*eDebug("MPEG4 AVC UAD but no valid PTS value.")*/;
}
}
return 0;
/* sorry for the redundant code here, but there are too many special cases... */
while (len)
{
+ /* emergency resync. usually, this should not happen, because the data should
+ be sync-aligned.
+
+ to make this code work for non-strictly-sync-aligned data, (for example, bad
+ files) we fix a possible resync here by skipping data until the next 0x47.
+
+ if this is a false 0x47, the packet will be dropped by wantPacket, and the
+ next time, sync will be re-established. */
+ int skipped = 0;
+ while (!m_pktptr && len)
+ {
+ if (packet[0] == 0x47)
+ break;
+ len--;
+ packet++;
+ skipped++;
+ }
+
+ if (skipped)
+ eDebug("SYNC LOST: skipped %d bytes.", skipped);
+
+ if (!len)
+ break;
+
if (m_pktptr)
{
/* skip last packet */
git.cweiske.de / enigma2.git / blobdiff