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gst/qtdemux/qtdemux.c: Catch invalid and commonly wrong playback rates in the elst atoms.

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Original commit message from CVS:
* gst/qtdemux/qtdemux.c: (qtdemux_parse_segments):
Catch invalid and commonly wrong playback rates in the elst atoms.
Fixes #567800.
This commit is contained in:
Wim Taymans 2009-01-15 14:53:18 +00:00
parent 9ee7150985
commit 293671170e
2 changed files with 20 additions and 3 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2009-01-15 Wim Taymans <wim.taymans@collabora.co.uk>
* gst/qtdemux/qtdemux.c: (qtdemux_parse_segments):
Catch invalid and commonly wrong playback rates in the elst atoms.
Fixes #567800.
2009-01-15 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* gst/spectrum/gstspectrum.c: (gst_spectrum_reset_state):

17
gst/qtdemux/qtdemux.c
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@ -3247,6 +3247,7 @@ qtdemux_parse_segments (GstQTDemux * qtdemux, QtDemuxStream * stream,
guint64 duration;
guint64 media_time;
QtDemuxSegment *segment;
guint32 rate_int;
media_time = QT_UINT32 (buffer + 20 + i * 12);
@ -3269,13 +3270,23 @@ qtdemux_parse_segments (GstQTDemux * qtdemux, QtDemuxStream * stream,
segment->media_start =
gst_util_uint64_scale (media_time, GST_SECOND, stream->timescale);
segment->media_stop = segment->media_start + segment->duration;
segment->rate = QT_FP32 (buffer + 24 + i * 12);
rate_int = GST_READ_UINT32_BE (buffer + 24 + i * 12);
if (rate_int <= 1) {
/* 0 is not allowed, some programs write 1 instead of the floating point
* value */
GST_WARNING_OBJECT (qtdemux, "found suspicious rate %" G_GUINT32_FORMAT,
rate_int);
segment->rate = 1;
} else {
segment->rate = rate_int / 65536.0;
}
GST_DEBUG_OBJECT (qtdemux, "created segment %d time %" GST_TIME_FORMAT
", duration %" GST_TIME_FORMAT ", media_time %" GST_TIME_FORMAT
", rate %g", i, GST_TIME_ARGS (segment->time),
", rate %g, (%d)", i, GST_TIME_ARGS (segment->time),
GST_TIME_ARGS (segment->duration),
GST_TIME_ARGS (segment->media_start), segment->rate);
GST_TIME_ARGS (segment->media_start), segment->rate, rate_int);
}
GST_DEBUG_OBJECT (qtdemux, "found %d non-empty segments", count);
stream->n_segments = count;