+
+RESULT eDVBChannel::seekTo(iDVBDemux *decoding_demux, int relative, pts_t &pts)
+{
+ int bitrate = m_tstools.calcBitrate(); /* in bits/s */
+
+ if (bitrate == -1)
+ return -1;
+
+ if (relative)
+ {
+ pts_t now;
+ if (getCurrentPosition(decoding_demux, now))
+ {
+ eDebug("seekTo: getCurrentPosition failed!");
+ return -1;
+ }
+ pts += now;
+ }
+
+ if (pts < 0)
+ pts = 0;
+
+ off_t offset = (pts * (pts_t)bitrate) / 8ULL / 90000ULL;
+
+ seekToPosition(decoding_demux, offset);
+ return 0;
+}
+
+RESULT eDVBChannel::seekToPosition(iDVBDemux *decoding_demux, const off_t &r)
+{
+ /* when seeking, we have to ensure that all buffers are flushed.
+ there are basically 3 buffers:
+ a.) the filepush's internal buffer
+ b.) the PVR buffer (before demux)
+ c.) the ratebuffer (after demux)
+
+ it's important to clear them in the correct order, otherwise
+ the ratebuffer (for example) would immediately refill from
+ the not-yet-flushed PVR buffer.
+ */
+ eDebug("eDVBChannel: seekToPosition .. %llx", r);
+ m_pvr_thread->pause();
+
+ /* flush internal filepush buffer */
+ m_pvr_thread->flush();
+
+ /* HACK: flush PVR buffer */
+ ::ioctl(m_pvr_fd_dst, 0);
+
+ /* flush ratebuffers (video, audio) */
+ if (decoding_demux)
+ decoding_demux->flush();
+
+ /* demux will also flush all decoder.. */
+ m_pvr_thread->seek(SEEK_SET, r);
+ m_pvr_thread->resume();
+ return 0;
+}