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tsdemux: Handle quirk in jp2k es header handling

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The jp2k specification (ITU-T T.800) specifies that the 'brat' box
has two fields and the second one (AUF2) can be set to 0 for progressive
streams.

The problem is that the mpeg-ts specification (ITU-T H.222.0 06/2012)
says that the AUF2 field is only present if the stream is interlaced

In order to cope with both situation, accept those next 32bit if the
stream is marked as progressive and those bits contain 0

https://bugzilla.gnome.org/show_bug.cgi?id=786111
This commit is contained in:
Edward Hervey 2017-08-29 11:14:59 +02:00 committed by Edward Hervey
parent 4e239a6632
commit c393f0d768
1 changed files with 12 additions and 0 deletions
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12
gst/mpegtsdemux/tsdemux.c
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@ -2730,8 +2730,20 @@ parse_jp2k_access_unit (TSDemuxStream * stream)
goto error;
#endif
}
/* Time Code Box 'tcod' == 0x74636f64 */
/* Some progressive streams might have a AUF[1] of value 0 present */
header_tag = gst_byte_reader_get_uint32_be_unchecked (&reader);
if (header_tag == 0 && !stream->jp2kInfos.interlace) {
AUF[1] = header_tag;
header_tag = gst_byte_reader_get_uint32_be_unchecked (&reader);
/* Bump up header size and recheck */
header_size += 4;
if (stream->current_size < header_size) {
GST_ERROR_OBJECT (stream->pad, "Not enough data for header");
goto error;
}
}
if (header_tag != 0x74636f64) {
GST_ERROR_OBJECT (stream->pad,
"Expected Time code box but found %d box instead", header_tag);