closeFile();
if (!nostreaminfo)
- m_streaminfo.load((std::string(filename) + ".ap").c_str());
+ {
+ eDebug("loading streaminfo for %s", filename);
+ m_streaminfo.load(filename);
+ }
if (!m_streaminfo.empty())
m_use_streaminfo = 1;
}
}
-int eDVBTSTools::getOffset(off_t &offset, pts_t &pts)
+int eDVBTSTools::getOffset(off_t &offset, pts_t &pts, int marg)
{
if (m_use_streaminfo)
{
- offset = m_streaminfo.getAccessPoint(pts);
+ if (pts >= m_pts_end && marg > 0 && m_end_valid)
+ offset = m_offset_end;
+ else
+ offset = m_streaminfo.getAccessPoint(pts, marg);
return 0;
} else
{
pts_t pts_diff = u->first - l->first;
off_t offset_diff = u->second - l->second;
+
+ if (offset_diff < 0)
+ {
+ eDebug("something went wrong when taking samples.");
+ m_samples.clear();
+ takeSamples();
+ continue;
+ }
eDebug("using: %llx:%llx -> %llx:%llx", l->first, u->first, l->second, u->second);
if (p != -1)
{
pts = p;
+ eDebug("aborting. Taking %llx as offset for %lld", offset, pts);
return 0;
}
}
int bitrate = calcBitrate();
offset = pts * (pts_t)bitrate / 8ULL / 90000ULL;
+ eDebug("fallback, bitrate=%d, results in %016llx", bitrate, offset);
offset -= offset % 188;
return 0;
{
if (!eDVBTSTools::getPTS(off, p, 1))
{
+ /* as we are happily mixing PTS and PCR values (no comment, please), we might
+ end up with some "negative" segments.
+
+ so check if this new sample is between the previous and the next field*/
+
+ std::map<pts_t, off_t>::const_iterator l = m_samples.lower_bound(p);
+ std::map<pts_t, off_t>::const_iterator u = l;
+
+ if (l != m_samples.begin())
+ {
+ --l;
+ if (u != m_samples.end())
+ {
+ if ((l->second > off) || (u->second < off))
+ {
+ eDebug("ignoring sample %llx %llx %llx (%lld %lld %lld)",
+ l->second, off, u->second, l->first, p, u->first);
+ return 1;
+ }
+ }
+ }
+
+
m_samples[p] = off;
return 0;
}
return -1;
}
+
+int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int frame_types)
+{
+ off_t offset = _offset;
+ int nr_frames = 0;
+// eDebug("trying to find iFrame at %llx", offset);
+
+ if (!m_use_streaminfo)
+ {
+// eDebug("can't get next iframe without streaminfo");
+ return -1;
+ }
+
+ /* let's find the iframe before the given offset */
+ unsigned long long data;
+
+ if (direction < 0)
+ offset--;
+
+ while (1)
+ {
+ if (m_streaminfo.getStructureEntry(offset, data, (direction == 0) ? 1 : 0))
+ {
+ eDebug("getting structure info for origin offset failed.");
+ return -1;
+ }
+ if (offset == 0x7fffffffffffffffLL) /* eof */
+ {
+ eDebug("reached eof");
+ return -1;
+ }
+ /* data is usually the start code in the lower 8 bit, and the next byte <<8. we extract the picture type from there */
+ /* we know that we aren't recording startcode 0x09 for mpeg2, so this is safe */
+ /* TODO: check frame_types */
+ int is_start = (data & 0xE0FF) == 0x0009; /* H.264 NAL unit access delimiter with I-frame*/
+ is_start |= (data & 0x3800FF) == 0x080000; /* MPEG2 picture start code with I-frame */
+
+ int is_frame = ((data & 0xFF) == 0x0009) || ((data & 0xFF) == 0x00); /* H.264 UAD or MPEG2 start code */
+
+ if (is_frame)
+ {
+ if (direction < 0)
+ --nr_frames;
+ else
+ ++nr_frames;
+ }
+// eDebug("%08llx@%llx -> %d, %d", data, offset, is_start, nr_frames);
+ if (is_start)
+ break;
+
+ if (direction == -1)
+ --offset; /* move to previous entry */
+ else if (direction == +1)
+ direction = 0;
+ }
+ /* let's find the next frame after the given offset */
+ off_t start = offset;
+
+ do {
+ if (m_streaminfo.getStructureEntry(offset, data, 1))
+ {
+ eDebug("get next failed");
+ return -1;
+ }
+ if (offset == 0x7fffffffffffffffLL) /* eof */
+ {
+ eDebug("reached eof (while looking for end of iframe)");
+ return -1;
+ }
+// eDebug("%08llx@%llx (next)", data, offset);
+ } while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00)); /* next frame */
+
+ /* align to TS pkt start */
+// start = start - (start % 188);
+// offset = offset - (offset % 188);
+
+ len = offset - start;
+ _offset = start;
+ direction = nr_frames;
+// eDebug("result: offset=%llx, len: %ld", offset, (int)len);
+ return 0;
+}
+
+int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int frame_types)
+{
+ int nr_frames = 0;
+// eDebug("trying to move %d frames at %llx", distance, offset);
+
+ frame_types = frametypeI; /* TODO: intelligent "allow IP frames when not crossing an I-Frame */
+
+ int direction = distance > 0 ? 0 : -1;
+ distance = abs(distance);
+
+ off_t new_offset = offset;
+ size_t new_len = len;
+
+ while (distance > 0)
+ {
+ int dir = direction;
+ if (findFrame(new_offset, new_len, dir, frame_types))
+ {
+// eDebug("findFrame failed!\n");
+ return -1;
+ }
+
+ distance -= abs(dir);
+
+// eDebug("we moved %d, %d to go frames (now at %llx)", dir, distance, new_offset);
+
+ if (distance >= 0)
+ {
+ offset = new_offset;
+ len = new_len;
+ nr_frames += abs(dir);
+ }
+ }
+
+ distance = (direction < 0) ? -nr_frames : nr_frames;
+// eDebug("in total, we moved %d frames", nr_frames);
+
+ return 0;
+}
git.cweiske.de / enigma2.git / blobdiff