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mpegpsdemux: workaround to fix playback of certain malformed clips

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Added a workarround to permit play certain malformed clips where first
SCR is greater than last SCR. Fixes bug #454228
This commit is contained in:
Josep Torra 2009-03-13 10:07:18 +00:00 committed by Zaheer Merali
parent cf92e49a32
commit 6cb429eb4f
1 changed files with 29 additions and 2 deletions
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31
gst/mpegdemux/gstmpegdemux.c
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@ -2276,6 +2276,8 @@ gst_flups_sink_get_duration (GstFluPSDemux * demux)
GstFormat format = GST_FORMAT_BYTES;
gint64 length = 0;
guint64 offset;
guint i;
guint64 scr = 0;
/* init the sink segment */
gst_segment_init (&demux->sink_segment, format);
@ -2301,10 +2303,10 @@ gst_flups_sink_get_duration (GstFluPSDemux * demux)
/* scan for first SCR in the stream */
offset = demux->sink_segment.start;
gst_flups_demux_scan_forward_ts (demux, &offset, SCAN_SCR, &demux->first_scr);
demux->base_time = MPEGTIME_TO_GSTTIME (demux->first_scr);
GST_DEBUG_OBJECT (demux, "First SCR: %" G_GINT64_FORMAT " %" GST_TIME_FORMAT
" in packet starting at %" G_GUINT64_FORMAT,
demux->first_scr, GST_TIME_ARGS (demux->base_time), offset);
demux->first_scr, GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (demux->first_scr)),
offset);
demux->first_scr_offset = offset;
/* scan for last SCR in the stream */
offset = demux->sink_segment.stop;
@ -2328,6 +2330,31 @@ gst_flups_sink_get_duration (GstFluPSDemux * demux)
" in packet starting at %" G_GUINT64_FORMAT,
demux->last_pts, GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (demux->last_pts)),
offset);
/* Detect wrong SCR values */
if (demux->first_scr > demux->last_scr) {
GST_DEBUG_OBJECT (demux, "Wrong SCR values detected, searching for "
"a better first SCR value");
offset = demux->first_scr_offset;
for (i = 0; i < 10; i++) {
offset++;
gst_flups_demux_scan_forward_ts (demux, &offset, SCAN_SCR, &scr);
if (scr < demux->last_scr) {
demux->first_scr = scr;
demux->first_scr_offset = offset;
/* Start demuxing from the right place */
demux->sink_segment.last_stop = offset;
GST_DEBUG_OBJECT (demux, "Replaced First SCR: %" G_GINT64_FORMAT
" %" GST_TIME_FORMAT " in packet starting at %" G_GUINT64_FORMAT,
demux->first_scr,
GST_TIME_ARGS (MPEGTIME_TO_GSTTIME (demux->first_scr)), offset);
break;
}
}
}
/* Set the base_time and avg rate */
demux->base_time = MPEGTIME_TO_GSTTIME (demux->first_scr);
demux->scr_rate_n = demux->last_scr_offset - demux->first_scr_offset;
demux->scr_rate_d = demux->last_scr - demux->first_scr;
if (G_LIKELY (demux->first_pts != G_MAXUINT64 &&
demux->last_pts != G_MAXUINT64)) {